CN109139104A - One kind passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method - Google Patents

One kind passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method Download PDF

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Publication number
CN109139104A
CN109139104A CN201811366831.5A CN201811366831A CN109139104A CN 109139104 A CN109139104 A CN 109139104A CN 201811366831 A CN201811366831 A CN 201811366831A CN 109139104 A CN109139104 A CN 109139104A
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China
Prior art keywords
tunnel
construction
hole
base
drain cavern
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CN201811366831.5A
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CN109139104B (en
Inventor
王存宝
赵志辉
段锋
李瑛�
胡晓辉
李奕
郑大伟
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Sixth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
Firts Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
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Firts Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
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Priority to CN201811366831.5A priority Critical patent/CN109139104B/en
Publication of CN109139104A publication Critical patent/CN109139104A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage
    • E21F16/02Drainage of tunnels
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings

Abstract

Pass through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method the invention discloses one kind, institute's construction tunnel main tunnel is divided into rear side tunnel construction sections, front side tunnel construction sections and from the inverse middle part tunnel construction sections for rushing rich water tomography and passing through of clastic rock steep dip;The same side of institute's construction tunnel main tunnel is provided with detour base tunnel and drain cavern;When carrying out drainage construction to institute's construction tunnel main tunnel, comprising steps of one, the preliminary excavation construction of rear side tunnel construction sections;Two, rear side tunnel construction sections excavation construction synchronous with drain cavern scupper body;Three, rear side tunnel construction sections, drain cavern scupper body and rear side detour base tunnel segment sync excavation construction;Four, front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction.The present invention provides new operation side by detour base tunnel, improves work efficiency, while high-order drain cavern is provided between tunnel main tunnel and detour base tunnel, it can utmostly be discharged in tomography and assign water, reduce front of tunnel heading tomography internal water pressure, guarantees each face construction safety, and can be shortened the duration.

Description

One kind passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method
Technical field
The invention belongs to technical field of tunnel construction, pass through that clastic rock steep dip is inverse to rush rich water tomography tunnel more particularly, to one kind Road drainage and construction method.
Background technique
Shear-zone, which refers to, is crushed the ground that sillar and several auxiliary faults or the plane of fracture form by dominant fault face and its two sides Band.At home, high angle reversed fault of the section dip angle greater than 45 ° or 30 ° is known as thrust, for passing through inclination angle greater than 60 ° Steep dip thrust constructing tunnel difficulty it is bigger, wherein steep dip thrust refers to that section dip angle is greater than 60 ° of thrust. Clastic rock refers to the mineral generated by parent rock physical weathering and rock debris through carrying, deposition, compacting and rock that is cementing and being formed Stone;Its component is in addition to detrital grain, and there are also miscellaneous base and cements.When carrying out constructing tunnel for Clastic Stratum of Country Rocks, difficulty of construction Larger, especially when locating stratum is the water rich strata rich in underground water, rock crushing is that the preservation of underground water is mentioned with enrichment More favorable condition is supplied, difficulty of construction is very big, Sand easily occurs in construction, along with tomography section dip angle is greater than 60 °, catastrophic effect is easily caused, seriously affects construction safety and benefit.Thus, break to the inverse rich water of rushing of clastic rock steep dip is passed through When the tunnel of layer is constructed, existing construction risk is very big, and the inverse rich water tomography that rushes of clastic rock steep dip is referred to rich in ground It is lauched and stratum is the steep dip thrust of Clastic Stratum of Country Rocks, when being excavated to that clastic rock steep dip is inverse to rush rich water tomography, face Easily broke-out diseases, gush sand, and rushing since clastic rock steep dip is inverse rich water tomography is clastic rock and rich in underground water, in high hydraulic pressure It is more likely formed water burst under effect, gushes the geological disasters such as sand, construction risk is high, and difficulty of construction is big and construction speed is slow.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing one kind passes through clast Rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, and method design is rationally and easy construction, using effect are good, by circuitous It returns base tunnel and new operation side is provided, effectively improve constructing tunnel work efficiency, while mentioning between tunnel main tunnel and detour base tunnel For high-order drain cavern, it can utmostly be discharged in tomography and assign water, reduce front of tunnel heading tomography internal water pressure, guarantee each face Construction safety, and can effectively shorten the construction period.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: one kind passes through that clastic rock steep dip is inverse to rush rich water Tomography tunnel drainage construction method, it is characterised in that: before institute's construction tunnel main tunnel is divided into rear side tunnel construction sections, is located at rear side tunnel construction sections It the front side tunnel construction sections of side and is connected between rear side tunnel construction sections and front side tunnel construction sections and rushes rich water tomography from clastic rock steep dip is inverse and wear The middle part tunnel construction sections crossed;The same side of institute's construction tunnel main tunnel is provided with detour base tunnel and drain cavern, the detour base tunnel and lets out Water hole is to pass through the inverse Tunnel for rushing rich water tomography of clastic rock steep dip from the front to the back;The detour base tunnel is in rear side tunnel construction sections The detour base tunnel of formation is excavated between the tunnel construction sections of front side, the detour base tunnel and institute's construction tunnel main tunnel are laid in same water In plane;The detour base tunnel is divided into rear side base tunnel section, middle part base tunnel section and front side base tunnel section, the front side base tunnel from the front to the back Section is located on front side of the rear side base tunnel section, the middle part base tunnel section be connected to the rear side base tunnel section and the front side base tunnel section it Between, the middle part base tunnel section is laid with institute's construction tunnel main tunnel in parallel, the rear side base tunnel section rear end and rear side tunnel construction sections phase It hands over and the intersection of the two is intersection after base tunnel, the front side base tunnel section front end is intersected with front side tunnel construction sections and the two is intersected Mouth is the preceding intersection of base tunnel;The rear side base tunnel section is located on rear side of the tunnel construction sections of middle part;
The drain cavern includes rear side hole body and is located on front side of the body of the rear side hole and with institute's construction tunnel main tunnel in parallel The front side hole body of laying, front side hole body be located at the upper side of institute's construction tunnel main tunnel and its be located at institute's construction tunnel main tunnel with Between the middle part base tunnel section, rear side hole body is gradually acclivitous Tunnel body from the front to the back;Rear side hole body Rear end is intersected with rear side tunnel construction sections and the intersection of the two is drain cavern intersection, intersection and the drain cavern after the base tunnel Intersection is respectively positioned on middle part tunnel construction sections rear side, and the drain cavern intersection and rear side hole body intersect after being respectively positioned on the base tunnel On rear side of mouthful;
Front side hole body is divided into rear portion hole body and on front side of the body of the rear portion hole and across the inverse punching richness of clastic rock steep dip The front drain cavern body of water tomography, the scupper of the rear portion hole body composition drain cavern in rear side hole body and front side hole body Body;
The middle part base tunnel section is divided into rear portion base tunnel section and is located on front side of the rear portion base tunnel section and passes through clastic rock steep dip The rear portion base tunnel section composition detour of the inverse front base tunnel section for rushing rich water tomography, the rear side base tunnel section and the middle part base tunnel section is led The rear side detour base tunnel section in hole;
When carrying out drainage construction to institute's construction tunnel main tunnel, comprising the following steps:
Step 1: the preliminary excavation construction of rear side tunnel construction sections: from the front to the back along tunnel longitudinal extension, to rear side tunnel construction sections In be located at the drain cavern intersection on rear side of tunnel segment carry out excavation construction;
Step 2: rear side tunnel construction sections excavation construction synchronous with drain cavern scupper body: being excavated to rear side tunnel construction sections described When at the present position of drain cavern intersection, along tunnel longitudinal extension from the front to the back in rear side tunnel construction sections be located at the sluicing Tunnel segment behind hole intersection and the base tunnel between intersection carries out excavation construction, while opening from the drain cavern intersection Begin to carry out excavation construction to the scupper body of drain cavern from the front to the back;
Step 3: rear side tunnel construction sections, drain cavern scupper body and rear side detour base tunnel segment sync excavation construction: to rear side tunnel When road section is excavated to after the base tunnel at the present position of intersection, along tunnel longitudinal extension from the front to the back to rear side tunnel construction sections In the tunnel segment that is located at after the base tunnel on front side of intersection carry out excavation construction;Meanwhile the scupper body of drain cavern is continued Excavation construction is carried out, and the rear side detour base tunnel section of detour base tunnel is opened from the front to the back intersection after the base tunnel Excavation construction;
Step 4: front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction: the front drain cavern Body is respectively multiple construction segments from the front to the back, offers drainage hole group outside a hole in each construction segment;
Drainage hole group includes a row or multi-row arch drainage hole and multiple rows of side for laying from the front to the back outside each hole Wall drainage hole, multiple rows of arch drainage hole are laid from the front to the back along the longitudinal extension of front side hole body;Described in every row Arch drainage hole includes multiple arch drainage holes being laid on the outside of front drain cavern body body arch from left to right, each The arch drainage hole is to be crept into from the front to the back to the inverse drilling rushed in rich water tomography of clastic rock steep dip, each arch row Water hole gradually inclination upwards from the front to the back;The aperture of all arch drainage holes is laid in institute in arch drainage hole described in every row On the same cross section for stating front side hole body;
Abutment wall drainage hole described in every row includes that two groups of left and right is symmetrically laid at left and right sides of the front drain cavern body body Abutment wall drainage hole on the outside of abutment wall, abutment wall drainage hole described in one group is located at institute's construction tunnel main tunnel in abutment wall drainage hole described in two groups Top, abutment wall drainage hole described in another group are located above detour base tunnel;Abutment wall drainage hole described in every group include it is multiple by up to The abutment wall drainage hole of lower laying, each abutment wall drainage hole is in horizontal layout;All sides in abutment wall drainage hole described in every row The aperture of wall drainage hole is laid on the same cross section of front side hole body;Each abutment wall drainage hole is by backward It is preceding to creep into the inverse drilling rushed in rich water tomography of clastic rock steep dip;
After the completion of the scupper body of drain cavern excavates, along tunnel longitudinal extension from the front to the back to the front of drain cavern Drain cavern body is constructed;
When constructing to the front drain cavern body of drain cavern, from the front to the back to multiple institutes in the front drain cavern body It states construction segment to construct respectively, the construction method of multiple construction segments is all the same;
When constructing to construction segment described in any of described front drain cavern body, process is as follows:
Step 401, drainage hole construction: using drilling machine to the arch drainage hole of drainage hole group outside hole described in the construction segment It drills respectively with abutment wall drainage hole, obtains drainage hole group outside the hole of construction molding;
Step 402, draining: it is drained by drainage hole group outside hole described in step 401;
Step 403, advanced curtain-grouting: advanced curtain-grouting is carried out to the rock stratum of the construction segment front of tunnel heading, is obtained Obtain the advanced curtain-grouting ruggedized construction of the construction segment;
Step 404, excavation construction: excavation construction is carried out to the construction segment from the front to the back along tunnel longitudinal extension;
After the completion of multiple construction segments in the front drain cavern body are constructed, the construction of drain cavern is completed Journey;
In this step, the front drain cavern body of drain cavern is carried out in work progress, from the front to the back along tunnel extending direction Excavation construction is carried out to the front base tunnel section of detour base tunnel, while along tunnel extending direction from the front to the back to institute's construction tunnel main tunnel Middle part tunnel construction sections carry out excavation construction.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: in step 4 When carrying out subsequent excavation construction to detour base tunnel from the front to the back along tunnel extending direction, the face of the detour base tunnel is located at institute State the face rear of front drain cavern body;
From the front to the back the middle part tunnel construction sections of institute's construction tunnel main tunnel excavate along tunnel extending direction in step 4 and be applied Working hour, the face of the middle part tunnel construction sections are located at the face rear of the front drain cavern body.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: the front side Tunnel construction sections be divided into the front tunnel construction sections on front side of the preceding intersection of the base tunnel and on rear side of the preceding intersection of the base tunnel after Portion's tunnel construction sections;
When carrying out front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction in step 4, led to detour After the completion of the construction of hole, excavation construction is carried out to the front tunnel construction sections of front side tunnel construction sections from the front to the back along tunnel longitudinal extension, Excavation construction is carried out to the rear portion tunnel construction sections of front side tunnel construction sections from the front to the back along tunnel longitudinal extension simultaneously.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: constructed tunnel Tunnel main tunnel supporting construction is provided in road main tunnel, the tunnel main tunnel supporting construction includes the split molding institute's construction tunnel of digging Main tunnel carry out preliminary bracing the first Tunnel structure and be laid on the inside of the first Tunnel structure first Tunnel Second Lining, the first Tunnel structure and the first Tunnel Second Lining be to institute's construction tunnel main tunnel into The supporting construction of row tunneling boring supporting;
Drain cavern supporting construction is provided in the drain cavern, the drain cavern supporting construction, which includes that split digging is molding, lets out Water hole carry out preliminary bracing the second Tunnel structure and be laid on the inside of the second Tunnel structure second Tunnel Second Lining, the second Tunnel structure and the second Tunnel Second Lining are to carry out tunneling boring to drain cavern The supporting construction of supporting;
In step 1, when carrying out excavation construction to rear side tunnel construction sections in step 2 and step 3, along the longitudinal extension side in tunnel Molding rear side tunnel construction sections progress supporting is dug to split from the front to the back, and obtains the tunnel main tunnel supporting construction of construction molding;
When carrying out excavation construction to middle part tunnel construction sections in step 4, scrape out along tunnel longitudinal extension is split from the front to the back The middle part tunnel construction sections of type carry out supporting, and obtain the tunnel main tunnel supporting construction of construction molding;
When carrying out excavation construction to the scupper body of drain cavern in step 2 and step 3, along tunnel longitudinal extension by It is split before backward to dig molding drain cavern progress supporting, and obtain the drain cavern supporting construction of construction molding;
When carrying out excavation construction to each construction segment in step 4, from the front to the back along tunnel longitudinal extension It is split to dig molding drain cavern progress supporting, and obtain the drain cavern supporting construction of construction molding;
Excavation construction is carried out to the scupper body of drain cavern from the front to the back since the drain cavern intersection in step 2 Before, first the first Tunnel structure in region locating for the drain cavern intersection and the first Tunnel Second Lining are distinguished Aperture is carried out, the drain cavern intersection of construction molding is obtained;
The rear side detour base tunnel section of detour base tunnel is carried out from the front to the back intersection after the base tunnel in step 3 It is first secondary to the first Tunnel structure in region locating for intersection after the base tunnel and the first tunnel before excavation construction Lining cutting carries out aperture respectively, obtains intersection after the base tunnel of construction molding.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: the sluicing Hole and detour base tunnel are the service gallery of institute's construction tunnel main tunnel, intersection after the base tunnel, the preceding intersection of the base tunnel and The drain cavern intersection is service gallery hole, and the service gallery hole is service gallery and institute's construction tunnel main tunnel phase The intersection of friendship;
To the first Tunnel structure in region locating for the drain cavern intersection and the first Tunnel Second Lining point Not carry out aperture boring method and to the first Tunnel structure in region locating for intersection after the base tunnel and first The boring method that Tunnel Second Lining carries out aperture respectively is identical and both for service gallery hole aperture method;
When carrying out aperture using the service gallery hole aperture method, to first of region locating for the service gallery hole Tunnel structure and the first Tunnel Second Lining carry out aperture respectively, and process is as follows:
Step A1, the first Tunnel Second Lining aperture: secondary to first tunnel in region locating for the service gallery hole Lining cutting carries out aperture, obtains two lining holes;
The structure at two lining hole is identical as the structure at the service gallery hole;
Step A2, the first Tunnel structure aperture: to first tunnel in region locating for the service gallery hole Preliminary bracing structure carries out aperture, obtains just branch hole;
The structure at the just branch hole is identical as the structure at the service gallery hole;
Step A3, hole supporting: using circumferential steel arch-shelf to just branch hole carries out supporting, the circumferential direction described in step A2 Steel arch-shelf be to it is described just branch hole carry out tunneling boring supporting support bracket and its structure with it is described at the beginning of the structure at branch hole it is identical.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: the sluicing It is provided with inclined shaft on rear side of hole, the inclined shaft front end is intersected with institute construction tunnel main tunnel and the intersection of the two is inclined shaft intersection, The inclined shaft intersection is located on rear side of the drain cavern intersection;The inclined shaft by for by the water being discharged from drain cavern from being applied The drainage channel being discharged in work tunnel main tunnel;
When carrying out the rear side preliminary excavation construction of tunnel construction sections in step 1, first along tunnel longitudinal extension from the front to the back to rear It is located at the tunnel segment on rear side of the inclined shaft intersection in the tunnel construction sections of side and carries out excavation construction;It is excavated to rear side tunnel construction sections described Behind the present position of inclined shaft intersection, then along tunnel longitudinal extension from the front to the back in rear side tunnel construction sections be located at the inclined shaft hand over Tunnel segment between prong and the drain cavern intersection carries out excavation construction, while to oblique since the inclined shaft intersection Well carries out excavation construction;
The arch drainage hole and abutment wall drainage hole are stratum drainage hole;
By passing through drainage hole group outside the hole when drainage hole group is drained outside hole described in step 401 in step 402 In each stratum drainage hole water is drained into drain cavern, then let out by being located at the inclined shaft intersection in rear side tunnel construction sections with described Tunnel segment Jiang Shui between the intersection of water hole is drained into inclined shaft, and water is discharged finally by the inclined shaft completed is excavated.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: the rear side Catch pit is provided in tunnel construction sections, the catch pit is between the drain cavern intersection and the inclined shaft intersection;It is described Gutter is provided in drain cavern, the gutter is laid along the longitudinal extension of drain cavern;The rear end in the gutter with Catch pit connection;
The aperture of each stratum drainage hole is coaxially installed with orifice tube, and the outer end of each orifice tube is inserted into To a stratum drainage hole, the inner end of each orifice tube is mounted on connecting flange, in each orifice tube End is connect by the connecting flange with the drainpipe for being connected to the gutter;
By when drainage hole group is drained outside hole described in step 401 in step 402, by pacifying in each stratum drainage hole The orifice tube of dress drains into water in drainpipe, then is drained into water in the gutter by the drainpipe, and pass through institute Gutter is stated to drain into catch pit;After the completion of oblique way, the water in catch pit is drained on the outside of inclined shaft by inclined shaft.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: multiple described The length of construction segment is all the same, and the length of each construction segment is 15m~25m;The front base tunnel section, the front The front end face of drain cavern body and the middle part tunnel construction sections is respectively positioned on same plane;
The middle part tunnel construction sections along tunnel longitudinal extension from the front to the back be respectively multiple main tunnel segments, it is each it is described just The length of hole segment is identical as the construction length of segment;
From the front to the back the middle part tunnel construction sections of institute's construction tunnel main tunnel excavate along tunnel extending direction in step 4 and be applied Working hour carries out excavation construction to multiple main tunnel segments from the front to the back respectively;The equal position of face of each main tunnel segment In the face rear of the front drain cavern body at this time and the length phase of horizontal space between the two and the construction segment Together;
The front base tunnel section is respectively multiple base tunnel segments along tunnel longitudinal extension from the front to the back, each described to lead The length for cheating segment is identical as the construction length of segment;
When carrying out excavation construction to the front base tunnel section of detour base tunnel from the front to the back along tunnel extending direction in step 4, by Excavation construction is carried out respectively to multiple base tunnel segments before backward;The face of each base tunnel segment is respectively positioned on institute at this time It states the face rear of front drain cavern body and horizontal space between the two is identical as the construction length of segment.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: each described A base tunnel drainage hole group is offered in base tunnel segment;
Each base tunnel drainage hole group includes a row or multi-row vault drainage hole and multiple rows of side for laying from the front to the back Portion's drainage hole, multiple rows of vault drainage hole are laid from the front to the back along the longitudinal extension of the front base tunnel section;Every row institute Stating vault drainage hole includes multiple vault drainage holes being laid on the outside of the front base tunnel section arch from left to right, Mei Gesuo Stating vault drainage hole is to be crept into from the front to the back to the inverse drilling rushed in rich water tomography of clastic rock steep dip, each vault draining Kong Jun gradually inclination upwards from the front to the back;The aperture of all vault drainage holes is laid in described in vault drainage hole described in every row On the same cross section of front base tunnel section;
Side drainage hole described in every row includes that two groups of left and right is symmetrically laid in abutment wall at left and right sides of the front base tunnel section The side drainage hole in outside, side drainage hole described in every group include multiple side drainage holes from top to bottom laid, Mei Gesuo Stating side drainage hole is in horizontal layout;The aperture in all side drainage holes is laid in described in side drainage hole described in every row On the same cross section of front base tunnel section;Each side drainage hole is to be crept into from the front to the back to the inverse punching richness of clastic rock steep dip Drilling in water tomography;
When carrying out excavation construction respectively to multiple base tunnel segments from the front to the back, the excavation of multiple base tunnel segments is applied Work method is all the same;
When constructing to base tunnel segment described in any of described front base tunnel section, process is as follows:
Step B1, drainage hole is constructed: using drilling machine to the vault drainage hole of base tunnel drainage hole group described in the base tunnel segment It drills respectively with side drainage hole, obtains the base tunnel drainage hole group of construction molding;
Step B2, it drains: being drained by drainage hole group outside hole described in step 401;
Step B3, advanced curtain-grouting: advanced curtain-grouting is carried out to the rock stratum of the base tunnel segment front of tunnel heading, is obtained The advanced curtain-grouting ruggedized construction of the base tunnel segment;
Step B4, excavation construction excavation construction: is carried out to the base tunnel segment from the front to the back along tunnel longitudinal extension;
After the completion of multiple equal excavation constructions in base tunnel segment in the front base tunnel section, the front base tunnel is completed The work progress of section.
Above-mentioned one kind passes through clastic rock steep dip against rich water tomography tunnel drainage construction method is rushed, it is characterized in that: each described Block wall in a hole is arranged in segment rear end of constructing, in the hole block wall and the perpendicular laying of front side hole body and its for pair The vertical block wall that front side hole body is blocked;
In step 401 carry out drainage hole construction before, need to also the construction segment rear end construct hole in block wall, constructed Hole in block wall be located on rear side of the face of the construction segment and the face of itself and the construction segment abuts.
Compared with the prior art, the present invention has the following advantages:
1, method and step is simple, design is reasonable and easy construction, input cost are lower.
2, drain cavern installation position is reasonable, and high-order drain cavern is arranged between detour base tunnel and tunnel main tunnel, steep to clastic rock Incline it is inverse rush rich water hanging wall hydrous fluids and sufficiently drained, realize that the inverse rich water hanging wall hydrous fluids that rush of clastic rock steep dip " divide The purpose of water decompression ", can effectively ensure construction safety, and the pre-grouting of tunnel main tunnel and detour base tunnel can also be effectively reduced Difficulty of construction can also accelerate construction progress while ensuring construction safety, constructing tunnel quality.
3, the design of drainage hole group rationally, had both been able to achieve drain cavern, tunnel main tunnel and detour and had led outside hole in front drain cavern body Inverse abundant, the effective draining for rushing rich water tomography of hole top clastic rock steep dip, while convenient for construction, arch drainage hole and abutment wall draining The length in hole can be effectively controlled, the effectively save cost of energy, and reduce the duration.
4, middle part tunnel construction sections are bypassed using detour base tunnel, be located on front side of the preceding intersection of base tunnel in institute's construction tunnel main tunnel It constructs tunnel segment.It is located at the tunnel segment on front side of the preceding intersection of the base tunnel in institute's construction tunnel main tunnel to apply While work, can synchronize in institute's construction tunnel main tunnel be located at the base tunnel after between intersection and the preceding intersection of the base tunnel Tunnel segment is constructed, thus can effectively improve construction efficiency, shortens the construction period.Also, detour base tunnel and tunnel main tunnel Between there are larger spacing, thus be independent of each other with the construction of tunnel main tunnel, and detour base tunnel work progress is easily controllable, construction It is process safety, reliable.
5, using effect is good and practical value is high, increases " high-order drain cavern " using in tunnel main tunnel side, while in tunnel The ipsilateral detour base tunnel performed of the right way formed in drainability with drain cavern it is complementary, utmostly be discharged tomography in assign water, protect Demonstrate,prove each face construction safety.Hydraulic pressure in tomography and displacement are reduced using high-order drain cavern, created conditions for grouting and reinforcing, Guarantee fault enhancement effect, curtain-grouting sealing operation is rapidly completed.Meanwhile using detour base tunnel is increased, new construction is provided Work surface improves Faults in Tunnels belt construction work efficiency, effectively save duration.
6, applied widely, it can effectively use to clastic rock rich water tomography containing sand, stratigraphic structure is complicated, Sand amount is big When spray anchor bored tunnel construction or the Underground Construction with similar characteristics.
In conclusion the method for the present invention design is reasonable and easy construction, using effect are good, provided newly by detour base tunnel Operation side effectively improves constructing tunnel work efficiency, while high-order drain cavern, energy are provided between tunnel main tunnel and detour base tunnel Water utmostly is assigned in discharge tomography, reduces front of tunnel heading tomography internal water pressure, guarantees each face construction safety, and energy Effectively shorten the construction period.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is construction method flow diagram of the invention.
Fig. 2 is the Construction State schematic diagram before drain cavern body in front of the present invention is constructed.
Fig. 3 is the Construction State schematic diagram after the completion of drain cavern body construction in front of the present invention.
Fig. 4 is institute's construction tunnel main tunnel of the present invention, the layout position illustration of detour base tunnel and drain cavern.
Fig. 5 is the plane installation position of detour base tunnel top heading drainage hole group before the present invention constructs to front base tunnel section Schematic diagram.
Description of symbols:
1-detour base tunnel;2-drain caverns;3-rear side tunnel construction sections;
4-front side tunnel construction sections;5-middle part tunnel construction sections;
6-clastic rock steep dips are inverse to rush rich water tomography;
7-catch pits;8-arch drainage holes;9-abutment wall drainage holes;
Block wall in 10-holes;Block wall in 11-base tunnels;12-main tunnel block walls;
13-inclined shafts;14-1-the first Tunnel structure;
14-2-the second Tunnel structure;
14-3-third Tunnel structure;
The first Tunnel Second Lining of 15-1-;
The second Tunnel Second Lining of 15-2-;
15-3-third Tunnel Second Lining;18-vault drainage holes;
19-side drainage holes.
Specific embodiment
One kind as shown in Figure 1 passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, institute's construction tunnel Main tunnel is divided into rear side tunnel construction sections 3, the front side tunnel construction sections 4 on front side of rear side tunnel construction sections 3 and is connected to rear side tunnel construction sections 3 and front side Between tunnel construction sections 4 and from the inverse middle part tunnel construction sections 5 for rushing rich water tomography 6 and passing through of clastic rock steep dip, it is detailed in Fig. 2, Fig. 3 and Fig. 4;It is applied The same side of work tunnel main tunnel is provided with detour base tunnel 1 and drain cavern 2, and the detour base tunnel 1 and drain cavern 2 are from the front to the back Pass through the inverse Tunnel for rushing rich water tomography 6 of clastic rock steep dip;The detour base tunnel 1 is in rear side tunnel construction sections 3 and front side tunnel construction sections 4 Between excavate the detour base tunnel of formation, the detour base tunnel 1 is laid in same level with institute's construction tunnel main tunnel;It is described Detour base tunnel 1 is divided into rear side base tunnel section, middle part base tunnel section and front side base tunnel section from the front to the back, and the front side base tunnel section is located at described On front side of rear side base tunnel section, the middle part base tunnel section is connected between the rear side base tunnel section and the front side base tunnel section, it is described in Portion's base tunnel section is laid with institute's construction tunnel main tunnel in parallel, and the rear side base tunnel section rear end is intersected with rear side tunnel construction sections 3 and the two Intersection be intersection after base tunnel, the front side base tunnel section front end is intersected with front side tunnel construction sections 4 and the intersection of the two is leads Cheat preceding intersection;The rear side base tunnel section is located at 5 rear side of middle part tunnel construction sections;
The drain cavern 2 includes rear side hole body and is located on front side of the body of the rear side hole and with institute's construction tunnel main tunnel in parallel The front side hole body of laying, front side hole body be located at the upper side of institute's construction tunnel main tunnel and its be located at institute's construction tunnel main tunnel with Between the middle part base tunnel section, rear side hole body is gradually acclivitous Tunnel body from the front to the back;Rear side hole body Rear end is intersected with rear side tunnel construction sections 3 and the intersection of the two is drain cavern intersection, intersection and the sluicing after the base tunnel Hole intersection is respectively positioned on 5 rear side of middle part tunnel construction sections, after the drain cavern intersection and rear side hole body are respectively positioned on the base tunnel On rear side of intersection;
Front side hole body is divided into rear portion hole body and on front side of the body of the rear portion hole and across the inverse punching richness of clastic rock steep dip The front drain cavern body of water tomography 6, the draining of the rear portion hole body composition drain cavern 2 in rear side hole body and front side hole body Hole body;
The middle part base tunnel section is divided into rear portion base tunnel section and is located on front side of the rear portion base tunnel section and passes through clastic rock steep dip The rear portion base tunnel section of the inverse front base tunnel section for rushing rich water tomography 6, the rear side base tunnel section and the middle part base tunnel section forms detour The rear side detour base tunnel section of base tunnel 1;
When carrying out drainage construction to institute's construction tunnel main tunnel, comprising the following steps:
Step 1: the preliminary excavation construction of rear side tunnel construction sections: from the front to the back along tunnel longitudinal extension, to rear side tunnel construction sections It is located at the tunnel segment on rear side of the drain cavern intersection in 3 and carries out excavation construction;
Step 2: rear side tunnel construction sections excavation construction synchronous with drain cavern scupper body: being excavated to rear side tunnel construction sections 3 described When at the present position of drain cavern intersection, let out from the front to the back in rear side tunnel construction sections 3 positioned at described along tunnel longitudinal extension Tunnel segment behind water hole intersection and the base tunnel between intersection carries out excavation construction, while from the drain cavern intersection Start to carry out excavation construction to the scupper body of drain cavern 2 from the front to the back;
Step 3: rear side tunnel construction sections, drain cavern scupper body and rear side detour base tunnel segment sync excavation construction: to rear side tunnel When road section 3 is excavated to after the base tunnel at the present position of intersection, along tunnel longitudinal extension from the front to the back to rear side tunnel Tunnel segment in section 3 on front side of intersection after the base tunnel carries out excavation construction;Meanwhile to the scupper body of drain cavern 2 Continue excavation construction, and after the base tunnel intersection from the front to the back to the rear side detour base tunnel section of detour base tunnel 1 Carry out excavation construction;
Step 4: front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction: the front drain cavern Body is respectively multiple construction segments from the front to the back, offers drainage hole group outside a hole in each construction segment;
In conjunction with Fig. 4, drainage hole group includes a row or multi-row arch drainage hole 8 and lays from the front to the back outside each hole Multiple rows of abutment wall drainage hole 9, longitudinal extension from the front to the back cloth of multiple rows of arch drainage hole 8 along front side hole body If;Arch drainage hole 8 described in every row includes multiple arches being laid on the outside of front drain cavern body body arch from left to right Portion's drainage hole 8, each arch drainage hole 8 are to be crept into from the front to the back to the inverse brill rushed in rich water tomography 6 of clastic rock steep dip Hole, the gradually inclination upwards from the front to the back of each arch drainage hole 8;All arch rows in arch drainage hole 8 described in every row The aperture in water hole 8 is laid on the same cross section of front side hole body;
Abutment wall drainage hole 9 described in every row includes that two groups of left and right is symmetrically laid at left and right sides of the front drain cavern body body Abutment wall drainage hole 9 on the outside of abutment wall, abutment wall drainage hole 9 described in one group is located at institute's construction tunnel in abutment wall drainage hole 9 described in two groups Above main tunnel, abutment wall drainage hole 9 described in another group is located at 1 top of detour base tunnel;Abutment wall drainage hole 9 described in every group includes multiple The abutment wall drainage hole 9 from top to bottom laid, each abutment wall drainage hole 9 are in horizontal layout;Abutment wall drainage hole 9 described in every row In the apertures of all abutment wall drainage holes 9 be laid on the same cross section of front side hole body;Each abutment wall drainage hole 9 It is to be crept into from the front to the back to the inverse drilling rushed in rich water tomography 6 of clastic rock steep dip;
After drain cavern 2 scupper body excavate after the completion of, along tunnel longitudinal extension from the front to the back to drain cavern 2 before Portion's drain cavern body is constructed;
When constructing to the front drain cavern body of drain cavern 2, from the front to the back to multiple in the front drain cavern body The construction segment is constructed respectively, and the construction method of multiple construction segments is all the same;
When constructing to construction segment described in any of described front drain cavern body, process is as follows:
Step 401, drainage hole construction: using drilling machine to the arch drainage hole of drainage hole group outside hole described in the construction segment 8 and abutment wall drainage hole 9 drill respectively, obtain drainage hole group outside the hole of construction molding;
Step 402, draining: it is drained by drainage hole group outside hole described in step 401;
Step 403, advanced curtain-grouting: advanced curtain-grouting is carried out to the rock stratum of the construction segment front of tunnel heading, is obtained Obtain the advanced curtain-grouting ruggedized construction of the construction segment;
Step 404, excavation construction: excavation construction is carried out to the construction segment from the front to the back along tunnel longitudinal extension;
After the completion of multiple construction segments in the front drain cavern body are constructed, the construction of drain cavern 2 is completed Process;
In this step, the front drain cavern body of drain cavern 2 is carried out in work progress, from the front to the back along tunnel extending direction Excavation construction is carried out to the front base tunnel section of detour base tunnel 1, at the same along tunnel extending direction from the front to the back to institute's construction tunnel just The middle part tunnel construction sections 5 in hole carry out excavation construction.
According to general knowledge known in this field, advanced curtain-grouting, which refers to, add comprehensively to the soil body a certain range of in front of tunnel Gu water seal curtain is formed excavating area peripheral edge, to prevent seepage action of ground water from bringing greater risk to constructing tunnel.Step 403 When the advanced curtain-grouting of middle progress, according to conventional advanced curtain-grouting method to the rock stratum of the construction segment front of tunnel heading into The advanced curtain-grouting of row.
Wherein, the detour base tunnel 1 is laid in same level with institute construction tunnel main tunnel and refers to: the detour is led It is laid in same level at the maximum excavation width in hole 1 at the maximum excavation width of institute's construction tunnel main tunnel.Before described Clear distance between side hole body and institute's construction tunnel main tunnel is 5m~10m.In the present embodiment, front side hole body and institute's construction tunnel Clear distance between main tunnel is 7m.When practice of construction, according to specific needs, to front side hole body and institute's construction tunnel main tunnel it Between clear distance adjust accordingly.Wherein, the clear distance between front side hole body and institute's construction tunnel main tunnel refer to it is described before Vertical spacing between at the top of the side bottom Dong Ti and institute's construction tunnel main tunnel, the front side hole body bottom is being located at institute's construction tunnel just Upper side at the top of hole.
In the present embodiment, as shown in Fig. 2, block wall 10 in a hole, the hole is arranged in each construction segment rear end Interior block wall 10 and the perpendicular laying of front side hole body and its be the vertical block wall blocked to front side hole body;
In step 401 carry out drainage hole construction before, need to also the construction segment rear end construct hole in block wall 10, applied Block wall 10 is located on rear side of the face of the construction segment in the hole of work and the face of itself and the construction segment abuts.
Before reality excavates any one described construction segment, it is arranged in a hole in the construction segment rear end and seals Wall 10.Wall for grouting when block wall 10 is also capable as carrying out the construction segment advanced curtain-grouting in the hole, thus It is practical.
When practice of construction, it is multiple it is described construction segments length it is all the same, it is each it is described construction segment length be 15m~ 25m.In the present embodiment, the length of each construction segment is 20m, also according to specific needs, is saved to each construction The length of section adjusts accordingly respectively.
In the present embodiment, the front end face of the front base tunnel section, the front drain cavern body and the middle part tunnel construction sections 5 is equal It is in the same plane.
In the present embodiment, the middle part tunnel construction sections 5 are respectively multiple main tunnel sections along tunnel longitudinal extension from the front to the back Section, the length of each main tunnel segment are identical as the construction length of segment;
From the front to the back the middle part tunnel construction sections 5 of institute's construction tunnel main tunnel excavate along tunnel extending direction in step 4 and be applied Working hour carries out excavation construction to multiple main tunnel segments from the front to the back respectively;The equal position of face of each main tunnel segment In the face rear of the front drain cavern body at this time and the length phase of horizontal space between the two and the construction segment Together;
The front base tunnel section is respectively multiple base tunnel segments along tunnel longitudinal extension from the front to the back, each described to lead The length for cheating segment is identical as the construction length of segment;
When carrying out excavation construction to the front base tunnel section of detour base tunnel 1 from the front to the back along tunnel extending direction in step 4, Excavation construction is carried out respectively to multiple base tunnel segments from the front to the back;The face of each base tunnel segment is respectively positioned at this time The face rear of the front drain cavern body and horizontal space between the two is identical as the construction length of segment.
Utmostly to be drained, a base tunnel drainage hole group is offered in each base tunnel segment.
In conjunction with Fig. 5, each base tunnel drainage hole group includes a row or multi-row vault drainage hole 18 and cloth from the front to the back If multiple rows of side drainage hole 19, multiple rows of vault drainage hole 18 along the front base tunnel section longitudinal extension by backward Preceding laying;Vault drainage hole 18 described in every row includes multiple arches being laid on the outside of the front base tunnel section arch from left to right Top row water hole 18, each vault drainage hole 18 are to be crept into from the front to the back to clastic rock steep dip is inverse to rush in rich water tomography 6 Drilling, the gradually inclination upwards from the front to the back of each vault drainage hole 18;All arches in vault drainage hole 18 described in every row The aperture in top row water hole 18 is laid on the same cross section of the front base tunnel section;
Side drainage hole 19 described in every row includes that two groups of left and right is symmetrically laid in the front base tunnel section left and right sides Side drainage hole 19 on the outside of wall, side drainage hole 19 described in every group include multiple side drainage holes from top to bottom laid 19, each side drainage hole 19 is in horizontal layout;All side drainage holes 19 in side drainage hole 19 described in every row Aperture is laid on the same cross section of the front base tunnel section;Each side drainage hole 19 is to creep into from the front to the back To the inverse drilling rushed in rich water tomography 6 of clastic rock steep dip;
When carrying out excavation construction respectively to multiple base tunnel segments from the front to the back, the excavation of multiple base tunnel segments is applied Work method is all the same;
When constructing to base tunnel segment described in any of described front base tunnel section, process is as follows:
Step B1, drainage hole is constructed: using drilling machine to the vault drainage hole of base tunnel drainage hole group described in the base tunnel segment 18 and side drainage hole 19 drill respectively, obtain the base tunnel drainage hole group of construction molding;
Step B2, it drains: being drained by base tunnel drainage hole group described in step B1;
Step B3, advanced curtain-grouting: advanced curtain-grouting is carried out to the rock stratum of the base tunnel segment front of tunnel heading, is obtained The advanced curtain-grouting ruggedized construction of the base tunnel segment;
Step B4, excavation construction excavation construction: is carried out to the base tunnel segment from the front to the back along tunnel longitudinal extension;
After the completion of multiple equal excavation constructions in base tunnel segment in the front base tunnel section, the front base tunnel is completed The work progress of section.
When carrying out advanced curtain-grouting in the present embodiment, in step B3, according to conventional advanced curtain-grouting method, to this The rock stratum of base tunnel segment front of tunnel heading carries out advanced curtain-grouting.
In the present embodiment, as shown in Fig. 2, block wall 11 in a base tunnel is arranged in each base tunnel segment rear end, it is described In base tunnel block wall 11 and the middle part base tunnel section it is perpendicular laying and its be the vertical envelope blocked to front side hole body Wall;
In the base tunnel block wall 11 and the front base tunnel section it is perpendicular laying and its be to the front base tunnel section into The vertical block wall that row blocks;
In step B1 carry out drainage hole construction before, need to also the base tunnel segment rear end construct base tunnel in block wall 11, institute Block wall 11 is located on rear side of the face of the base tunnel segment in the base tunnel of construction and the face of itself and the base tunnel segment abuts.
Before reality excavates any one described base tunnel segment, it is arranged in a base tunnel in the base tunnel segment rear end Block wall 11.Wall for grouting when block wall 11 is also capable as carrying out the construction segment advanced curtain-grouting in the base tunnel, It is thus practical.
3 front of rear side tunnel construction sections is provided with main tunnel block wall 12, and the main tunnel block wall 12 is in rear side tunnel construction sections 3 Vertical runs and its be the vertical block wall that rear side tunnel construction sections 3 are blocked;The main tunnel block wall 12 and institute's construction tunnel The inverse rear end face for rushing rich water tomography 6 of main tunnel intraclast rock steep dip abuts, and block wall 11 is equal in block wall 10 and base tunnel in the hole It is laid with main tunnel block wall 12 in parallel.
Block wall 10 is block wall in the hole of rear end in the hole of the construction segment rear end of the last one in the body of the front side hole, Block wall 11 is rear end base tunnel block wall in the base tunnel of the last one base tunnel segment rear end of front base tunnel section, after described Block wall and the rear end base tunnel block wall are laid on same vertical plane and after the two is respectively positioned on main tunnel block wall 12 in the hole of end Side, the clear distance in the rear end hole between block wall and main tunnel block wall 12 are 2m~5m.Wherein, block wall in the rear end hole Clear distance between main tunnel block wall 12 refers to the rear side of the front side wall of block wall and main tunnel block wall 12 in the rear end hole Horizontal space between wall.
In the present embodiment, it is located on the foremost side in arch drainage hole 8 described in a row in each construction segment, Mei Gesuo The front end for stating arch drainage hole 8 is respectively positioned on front side of the front end face of the construction segment;All arch rows in each construction segment The aperture in water hole 8 is respectively positioned on rear side of the rear end face of the construction segment.A row institute is located on the foremost side in each construction segment It states in abutment wall drainage hole 9, the front end of each abutment wall drainage hole 9 is respectively positioned on front side of the front end face of the construction segment;Each institute The aperture for stating all abutment wall drainage holes 9 in construction segment is respectively positioned on rear side of the rear end face of the construction segment.In this way, can effectively ensure All construction segments can be carried out abundant, effective draining, and can ensure that also can be carried out between two neighboring construction segment sufficiently, Effectively draining, effectively ensures construction safety.
Before being excavated any one described construction segment, the first block wall in the rear end construction hole of the construction segment 10, then drainage hole group outside the hole in the construction segment is drilled with;Recycle outside the hole that is drilled drainage hole group into Row draining, removes block wall 10 in the hole of the construction segment rear end after the completion of draining, then open the construction segment Excavation construction.It is effectively blocked by block wall 10 in hole, can ensure that and the construction segment is carried out in drainage procedure, the front side Water burst occurs in the body of hole, gushes sand accident.Also, sufficiently, effectively after draining, then excavation construction is carried out to the construction segment, can had Effect ensures construction safety.
In the present embodiment, after the aperture of all arch drainage holes 8 is respectively positioned on the construction segment in each construction segment 10 rear side of block wall in the hole at end;The aperture of all abutment wall drainage holes 9 is respectively positioned on the construction segment in each construction segment The rear side of block wall 10 in the hole of rear end effectively in drainage procedure, can excavate molding front side hole body safety in this way.
The aperture of the arch drainage hole 8 is that port, the aperture of the abutment wall drainage hole 9 are port thereafter thereafter.
In the present embodiment, it is located on the foremost side in vault drainage hole 18 described in a row in each base tunnel segment, each The front end of the vault drainage hole 18 is respectively positioned on front side of the front end face of the base tunnel segment;All vaults in each base tunnel segment The aperture of drainage hole 18 is respectively positioned on rear side of the rear end face of the base tunnel segment.A row is located on the foremost side in each base tunnel segment In the side drainage hole 19, the front end in each side drainage hole 19 is respectively positioned on front side of the front end face of the base tunnel segment;Often The aperture in all side drainage holes 19 is respectively positioned on rear side of the rear end face of the base tunnel segment in a base tunnel segment.In this way, can have Effect ensures that all base tunnel segments can be carried out abundant, effective draining, and can ensure that between two neighboring base tunnel segment also can be into Row sufficiently, effectively drains, and effectively ensures construction safety.
Before being excavated any one described base tunnel segment, the first block wall in the rear end construction base tunnel of the base tunnel segment 11, then drainage hole group outside the hole in the base tunnel segment is drilled with;Recycle outside the hole that is drilled drainage hole group into Row draining, removes block wall 11 in the base tunnel of the base tunnel segment rear end after the completion of draining, then carries out to the base tunnel segment Excavation construction.It is effectively blocked by block wall 11 in base tunnel, can ensure that and the base tunnel segment is carried out in drainage procedure, it is described Water burst occurs in the body of front side hole, gushes sand accident.Also, sufficiently, effectively after draining, then excavation construction is carried out to the base tunnel segment, It can effectively ensure construction safety.
In the present embodiment, after the aperture of all vault drainage holes 18 is respectively positioned on the base tunnel segment in each base tunnel segment 11 rear side of block wall in the base tunnel at end;The aperture in all side drainage holes 19 is respectively positioned on the base tunnel section in each base tunnel segment The rear side of block wall 10 in the hole of Duan Houduan effectively in drainage procedure, can excavate molding front side hole body safety in this way.
The aperture of the vault drainage hole 18 is that port, the aperture in the side drainage hole 19 are port thereafter thereafter.
In the present embodiment, block wall 10 in the hole, in base tunnel block wall 11 and main tunnel block wall 12 be with a thickness of The concrete walls of 20cm.When practice of construction, according to specific needs, to block wall 11 and main tunnel in block wall 10 in hole, base tunnel The wall thickness of block wall 12 adjusts accordingly respectively.
To ensure that sluicing effect, the arch drainage hole 8 and abutment wall drainage hole 9 rush rich water tomography into clastic rock steep dip is inverse 6 length is not less than 10m.When practice of construction, according to specific needs, arch drainage hole 8 and abutment wall drainage hole 9 are entered broken The inverse length for rushing rich water tomography 6 of bits rock steep dip adjusts accordingly.
In the present embodiment, the inverse rich water of rushing of the front end face and institute's construction tunnel main tunnel intraclast rock steep dip of front side hole body is broken The front end face of layer 6 is located on same vertical plane.
To improve speed of application, and to ensure construction safety, intersection and 5 rear end face of middle part tunnel construction sections after the base tunnel Between spacing be 50m~100m.Spacing between 5 rear end face of the drain cavern intersection and middle part tunnel construction sections be 120m~ 180m.Spacing between the preceding intersection of the base tunnel and 5 front end face of middle part tunnel construction sections is 20m~60m.It is described in the present embodiment Spacing after base tunnel between 5 rear end face of intersection and middle part tunnel construction sections is 70m, the drain cavern intersection and middle part tunnel construction sections 5 Spacing between rear end face is 150m, and the spacing between the preceding intersection of the base tunnel and 5 front end face of middle part tunnel construction sections is 40m.Its In, the rear end face of middle part tunnel construction sections 5 is the front end face of main tunnel block wall 12, and the front end face of middle part tunnel construction sections 5 is institute's construction tunnel The inverse front end face for rushing rich water tomography 6 of main tunnel intraclast rock steep dip.
When practice of construction, according to specific needs, between 5 rear end face of intersection after the base tunnel and middle part tunnel construction sections Spacing and the preceding intersection of base tunnel and middle part tunnel between 5 rear end face of spacing, the drain cavern intersection and middle part tunnel construction sections Spacing between 5 front end faces of section adjusts accordingly respectively.
To ensure construction safety, block wall 10 is located at that 2 intraclast rock steep dip of drain cavern is inverse to rush rich water tomography 6 in the hole On rear side of rear end face.
In the present embodiment, inclined shaft 13,13 front end of inclined shaft and institute's construction tunnel main tunnel are provided on rear side of the drain cavern 2 The intersection of intersection and the two is inclined shaft intersection, and the inclined shaft intersection is located on rear side of the drain cavern intersection;It is described oblique Well 13 is the drainage channel for will be discharged out of institute construction tunnel main tunnel from the water that drain cavern 2 is discharged;
When carrying out the rear side preliminary excavation construction of tunnel construction sections in step 1, first along tunnel longitudinal extension from the front to the back to rear It is located at the tunnel segment on rear side of the inclined shaft intersection in side tunnel construction sections 3 and carries out excavation construction;Institute is excavated to rear side tunnel construction sections 3 After stating inclined shaft intersection present position, then it is described oblique to being located in rear side tunnel construction sections 3 from the front to the back along tunnel longitudinal extension Tunnel segment between well intersection and the drain cavern intersection carries out excavation construction, while since the inclined shaft intersection Excavation construction is carried out to inclined shaft 13;
The arch drainage hole 8 and abutment wall drainage hole 9 are stratum drainage hole;
By passing through drainage hole group outside the hole when drainage hole group is drained outside hole described in step 401 in step 402 In each stratum drainage hole water is drained into drain cavern 2, then by be located in rear side tunnel construction sections 3 the inclined shaft intersection with it is described Tunnel segment Jiang Shui between drain cavern intersection is drained into inclined shaft 13, and water is discharged finally by the inclined shaft 13 completed is excavated.
The aperture of the stratum drainage hole is φ 100mm~φ 120mm, and the aperture of each stratum drainage hole is coaxial Orifice tube is installed.
In the present embodiment, the vault drainage hole 18 and side drainage hole 19 are the stratum drainage hole.Also, it is each The aperture of the stratum drainage hole is coaxially installed with orifice tube.
As shown in Fig. 2, being provided with catch pit 7 in the rear side tunnel construction sections 3, the catch pit 7 is located at drain cavern friendship Between prong and the inclined shaft intersection;Gutter is provided in the drain cavern 2, the gutter is along the longitudinal direction of drain cavern 2 Extending direction is laid;The rear end in the gutter is connected to catch pit 7.Meanwhile the draining is provided in the detour base tunnel 1 Ditch.
The aperture of each stratum drainage hole is coaxially installed with orifice tube, for convenience of draining, each orifice tube Outer end be inserted into the stratum drainage hole, the inner end of each orifice tube is mounted on connecting flange, each The orifice tube inner end passes through the connecting flange and connect with the drainpipe for being connected to the gutter;
By when drainage hole group is drained outside hole described in step 401 in step 402, by pacifying in each stratum drainage hole The orifice tube of dress drains into water in drainpipe, then water is drained into the gutter in drain cavern 2 by the drainpipe It is interior, and drained into catch pit 7 by the gutter;After the completion of the excavation of inclined shaft 13, by inclined shaft 13 by the water in catch pit 7 Drain into 13 outside of inclined shaft.
When being drained in step B2 by base tunnel drainage hole group described in step B1, by being installed in each stratum drainage hole The orifice tube water is drained into drainpipe, then water is drained by the drainpipe by the gutter in detour base tunnel 1 It is interior, and drained into catch pit 7 by the gutter;After the completion of the excavation of inclined shaft 13, by inclined shaft 13 by the water in catch pit 7 Drain into 13 outside of inclined shaft.
In addition, the junction between the orifice tube and the drainpipe is mounted on hydraulic pressure force checking device, to each The discharge pressure of stratum drainage hole carries out real-time monitoring.In the present embodiment, the direction that meets water inside the orifice tube is laid with strainer.
In this way, the intracorporal water of front drain cavern flows through drainpipe and leads to institute by gutter when actually being drained Catch pit 7 in construction tunnel main tunnel, using pumping plant and by inclined shaft 13 outside easy, fast pumping to inclined shaft 13, and to oblique It can be discharged along slope after well 13 and perforation.Similarly, the water in the front base tunnel section flows through drainpipe and leads to institute by gutter Catch pit 7 in construction tunnel main tunnel, using pumping plant and by inclined shaft 13 outside easy, fast pumping to inclined shaft 13, and to oblique It can be discharged along slope after well 13 and perforation.
In the present embodiment, the outer diameter of length 2.5m~3.5m of the orifice tube, the orifice tube are arranged greater than the stratum The aperture in water hole.
In the present embodiment, the aperture of the stratum drainage hole is φ 110mm.The internal diameter of the orifice tube be φ 108mm and Its wall thickness is 9mm.
When practice of construction, according to specific needs, the size in aperture and orifice tube to the stratum drainage hole is carried out Corresponding adjustment.
In the present embodiment, arch drainage hole 8 described in every row includes 3 arch drainage holes, 8,3 arch drainage holes 8 Respectively it is located at and is laid in the middle part drainage hole right above the body of the front side hole and to be symmetrically laid in the middle part drainage hole left The left side drainage hole and right side drainage hole of right two sides, longitudinal extension cloth of the middle part drainage hole along front side hole body If the left side drainage hole is gradually tilted to the left from the front to the back, the right side drainage hole is gradually tilted to the right from the front to the back.Its In, spacing and front side hole body between the front port of the left side drainage hole and the right front port for surveying drainage hole are opened Dig it is of same size, wherein the excavation width of front side hole body refer to the front side hole body outline excavation it is maximum excavate it is wide Degree.In this way, can effectively ensure the drainage effect in region locating for the body of the front side hole by the arch drainage hole 8, and arch The length of drainage hole 8 can also be effectively controlled, the effectively save cost of energy, and reduce the duration.
In the present embodiment, vault drainage hole 8 described in every row includes 3 vault drainage holes, 8,3 vault drainage holes 8 Respectively it is located to be laid in the arch right above the front base tunnel section drainage hole and be symmetrically laid in the arch and arranges The outer drainage hole of leftwall at left and right sides of water hole and the outer drainage hole of RightWall, drainage hole is along the front base tunnel section in the arch Longitudinal extension lay, the outer drainage hole of the leftwall is gradually tilted to the left from the front to the back, the outer drainage hole of the RightWall It is gradually tilted to the right from the front to the back.Wherein, the front port of the outer drainage hole of the leftwall is located on the right side of institute's construction tunnel main tunnel.
As shown in the above, drainage system, and detour base tunnel 1 are provided in the drain cavern 2 and detour base tunnel 1 Construction speed it is slower than the construction speed of drain cavern 2, again can be by detour base tunnel 1 in this way after drain cavern 2 is drained Row supplement draining, the draining of drain cavern 2 and detour base tunnel 1 complement one another, are able to achieve and utmostly drain.Meanwhile detour base tunnel 1 The advanced curtain-grouting difficulty of detour base tunnel 1 can be effectively reduced in interior setting drainage system, and ensures that detour base tunnel 1 is easy, fast Speed construction is completed, and work progress is safe and reliable.
In the present embodiment, the length of advanced curtain-grouting ruggedized construction described in step 402 is not less than the construction segment Longitudinal length.
To ensure drainage effect, and to further increase difficulty of construction, the arch drainage hole 8 and abutment wall drainage hole 9 Borehole bottom location be respectively positioned on the outside of the advanced curtain-grouting ruggedized construction of the construction segment, i.e., described 8 He of arch drainage hole The front end of abutment wall drainage hole 9 is respectively positioned on the outside of the advanced curtain-grouting ruggedized construction, and the construction section can also be effectively ensured in this way The advanced curtain grouting reinforcement effect of section.
Similarly, the vault drainage hole 18 and the borehole bottom location in side drainage hole 19 are respectively positioned on the described super of the base tunnel segment On the outside of preceding curtain-grouting ruggedized construction, i.e., the front end in vault drainage hole 18 and side drainage hole 19 is respectively positioned on the advanced curtain note It starches on the outside of ruggedized construction, the advanced curtain grouting reinforcement effect of the base tunnel segment can also be effectively ensured in this way.
The rear side base tunnel section is the tunnel construction sections being gradually inclined outwardly from the front to the back, and the front side base tunnel section is from the front to the back Gradually intilted tunnel construction sections.In the present embodiment, the rear side base tunnel section, the front side base tunnel section and rear side hole body with Horizontal sextant angle between institute's construction tunnel main tunnel is 60 °.Horizontal folder between rear side hole body and institute's construction tunnel main tunnel Angle is 60 °.
Outside each hole in drainage hole group in two rows of arch drainage holes 8 between the aperture of arch drainage hole 8 between Away from for 2m~5m, the spacing in the adjacent two rows abutment wall drainage hole 9 between the aperture of abutment wall drainage hole 9 is 2m~5m.In this way, It can effectively ensure the drainage effect in drain cavern 2 by multiple arch drainage holes 8 and multiple abutment wall drainage holes 9, really It is abundant to protect draining.
Also, in each base tunnel drainage hole group the aperture in two rows of 18 hogging top row water holes 18 of vault drainage hole it Between spacing be 2m~5m, the spacing in the adjacent two rows side drainage hole 19 between the aperture in side drainage hole 19 for 2m~ 5m.In this way, can effectively be ensured in detour base tunnel 1 by multiple vault drainage holes 18 and multiple side drainage holes 19 Drainage effect, it is ensured that draining is abundant.
It sufficiently drains in construction tunnel main tunnel and 1 top rock mass of detour base tunnel to ensure, is located in the body of the front side hole The horizontal space of the longitudinal centre line of the front end and front side hole body of all abutment wall drainage holes 9 above institute's construction tunnel main tunnel Not less than d1, wherein d1 is between the longitudinal centre line of front side hole body and the level of the longitudinal centre line of institute's construction tunnel main tunnel Away from.Meanwhile front end and the front side hole body of all abutment wall drainage holes 9 in the body of the front side hole above detour base tunnel 1 The horizontal space of longitudinal centre line be not less than d2, wherein d2 is the longitudinal centre line and detour base tunnel 1 of front side hole body The horizontal space of longitudinal centre line.
In the present embodiment, in the body of the front side hole before all abutment wall drainage holes 9 above institute's construction tunnel main tunnel End and the horizontal space of the longitudinal centre line of front side hole body are d1, and 1 top of detour base tunnel is located in the body of the front side hole The front end of all abutment wall drainage holes 9 and the horizontal space of longitudinal centre line of front side hole body be d2.In this way, can not only Effectively ensure drainage effect, guarantees draining sufficiently, meanwhile, make the length of abutment wall drainage hole 9 that can also be effectively controlled, it can be effective Save the cost, and reduce the duration.
Spacing in the present embodiment, in arch drainage hole 8 described in every row between two neighboring 8 aperture of arch drainage hole It is 1.8m~2.2m, the spacing in abutment wall drainage hole 9 described in every group between neighbouring two abutment wall drainage holes 9 is 2m~3m.
When practice of construction, the clear distance between front side hole body and institute's construction tunnel main tunnel is 8m~9m, and the middle part is led Cheating the clear distance between section and institute's construction tunnel main tunnel is 26m~30m.
The excavated section of the detour base tunnel 1 and drain cavern 2 is respectively less than the excavated section of institute's construction tunnel main tunnel.This implementation In example, the detour base tunnel 1 and drain cavern 2 are the service gallery of institute's construction tunnel main tunnel.
According to general knowledge known in this field, for tunnel main tunnel is with respect to service gallery, tunnel main tunnel is to need construction molding Tunnel, when constructing to tunnel main tunnel, need to usually construct service gallery, such as inclined shaft, tunnel Heng Dong, base tunnel.It is described Detour base tunnel 1 and drain cavern 2 are bicycle road service gallery type section, the excavated section width of the detour base tunnel 1 and drain cavern 2 (i.e. excavation width, the maximum excavation width of outline excavation) is 3.8m~6m and the excavation height of the two is 3.5m~5m.Cause And the detour base tunnel 1 and drain cavern 2 are narrow-bore tunnel, although the detour base tunnel 1 and drain cavern 2 both pass through clastic rock Steep dip is inverse to rush rich water tomography 6, but compared to for institute's construction tunnel main tunnel, the difficulty of construction of the detour base tunnel 1 and drain cavern 2 is equal It is greatly reduced, and the construction risk of the two is also greatly reduced.
In addition, the detour base tunnel 1 apart from institute's construction tunnel main tunnel farther out, and detour base tunnel 1 select clastic rock steep dip It is inverse to rush the relatively good position of 6 earth formation of rich water tomography, thus its difficulty of construction and construction risk further decrease.Due to from Clastic rock steep dip is very big and very time-consuming against 5 difficulty of construction of middle part tunnel construction sections that rich water tomography 6 passes through is rushed, using detour Middle part tunnel construction sections 5 can be bypassed after base tunnel 1, to the tunnel segment being located on front side of the preceding intersection of the base tunnel in institute's construction tunnel main tunnel It constructs.Construct same in tunnel segment in institute's construction tunnel main tunnel on front side of the preceding intersection of the base tunnel When, it can synchronize to the tunnel section being located at after the base tunnel between intersection and the preceding intersection of the base tunnel in institute's construction tunnel main tunnel Duan Jinhang construction, thus construction efficiency can be effectively improved, shorten the construction period;Also, it can be from intersection after the base tunnel and institute It states the base tunnel position preceding intersection Liang Ge and intersects to being located at after the base tunnel in institute's construction tunnel main tunnel before intersection and the base tunnel Tunnel segment between mouthful is constructed in opposite directions, thus can further save the time, further shortens the construction period.
In the present embodiment, the clear distance between front side hole body and institute's construction tunnel main tunnel is 8.4m, the middle part base tunnel Clear distance between section and institute's construction tunnel main tunnel is 28.4m.
When practice of construction, according to specific needs, to the clear distance between front side hole body and institute's construction tunnel main tunnel with And the clear distance between the middle part base tunnel section and institute's construction tunnel main tunnel adjusts accordingly respectively.
In the present embodiment, front side hole body is gradually acclivitous inclination hole body from the front to the back, front side hole body The gradient be 8%~11%.
In the present embodiment, the inclined shaft 13 for institute's construction tunnel main tunnel service gallery.
When practice of construction, subsequent excavation construction is carried out to detour base tunnel 1 from the front to the back along tunnel extending direction in step 4 When, the face of the detour base tunnel 1 is located at the face rear of the front drain cavern body;
From the front to the back the middle part tunnel construction sections 5 of institute's construction tunnel main tunnel excavate along tunnel extending direction in step 4 and be applied Working hour, the face of the middle part tunnel construction sections 5 are located at the face rear of the front drain cavern body.In this way, can effectively ensure The working security of detour base tunnel 1 and middle part tunnel construction sections 5.
In the present embodiment, the front side tunnel construction sections 4 divide on front side of the preceding intersection of the base tunnel front tunnel construction sections and Rear portion tunnel construction sections on rear side of the preceding intersection of the base tunnel;
When carrying out front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction in step 4, led to detour After the completion of 1 construction of hole, from the front to the back the front tunnel construction sections of front side tunnel construction sections 4 excavate along tunnel longitudinal extension and be applied Work, while excavation construction, thus energy are carried out to the rear portion tunnel construction sections of front side tunnel construction sections 4 from the front to the back along tunnel longitudinal extension Construction speed is effectively improved, the construction period is shortened.Also, it in 5 work progress of middle part tunnel, can synchronize to front side tunnel Section 4 is constructed.
In the present embodiment, tunnel main tunnel supporting construction, the tunnel main tunnel supporting knot are provided in institute's construction tunnel main tunnel Structure includes split the first Tunnel structure 14-1 and the laying dug molding institute's construction tunnel main tunnel and carry out preliminary bracing The first Tunnel Second Lining 15-1 on the inside of the first Tunnel structure 14-1, the first Tunnel structure 14-1 and the first Tunnel Second Lining 15-1 is the supporting construction that tunneling boring supporting is carried out to institute's construction tunnel main tunnel;
Drain cavern supporting construction is provided in the drain cavern 2, the drain cavern supporting construction includes that split digging is molding Drain cavern 2 carries out the second Tunnel structure 14-2 of preliminary bracing and is laid in the second Tunnel structure 14-2 Second Tunnel Second Lining 15-2, the second Tunnel structure 14-2 and the second Tunnel Second Lining 15-2 of inside It is the supporting construction that tunneling boring supporting is carried out to drain cavern 2;
In step 1, when carrying out excavation construction to rear side tunnel construction sections 3 in step 2 and step 3, along the longitudinal extension side in tunnel The molding progress of rear side tunnel construction sections 3 supporting is dug to split from the front to the back, and obtains the tunnel main tunnel supporting construction of construction molding;
When carrying out excavation construction to middle part tunnel construction sections 5 in step 4, along tunnel longitudinal extension from the front to the back to excavation Molding middle part tunnel construction sections 5 carry out supporting, and obtain the tunnel main tunnel supporting construction of construction molding;
When carrying out excavation construction to the scupper body of drain cavern 2 in step 2 and step 3, along tunnel longitudinal extension It is split from the front to the back to dig the molding progress of drain cavern 2 supporting, and obtain the drain cavern supporting construction of construction molding;
When carrying out excavation construction to each construction segment in step 4, from the front to the back along tunnel longitudinal extension It is split to dig the molding progress of drain cavern 2 supporting, and obtain the drain cavern supporting construction of construction molding;
Excavation construction is carried out to the scupper body of drain cavern 2 from the front to the back since the drain cavern intersection in step 2 Before, first to the first Tunnel structure 14-1 in region locating for the drain cavern intersection and the first Tunnel Second Lining 15-1 carries out aperture respectively, obtains the drain cavern intersection of construction molding;
The rear side detour base tunnel section of detour base tunnel 1 is carried out from the front to the back intersection after the base tunnel in step 3 Before excavation construction, first to the first Tunnel structure 14-1 in region locating for intersection after the base tunnel and the first tunnel Secondary lining 15-1 carries out aperture respectively, obtains intersection after the base tunnel of construction molding.
In the present embodiment, the drain cavern 2 and detour base tunnel 1 are the service gallery of institute's construction tunnel main tunnel, described to lead Intersection, the preceding intersection of the base tunnel and the drain cavern intersection are service gallery hole behind hole, the service gallery hole Mouthful intersection intersected for service gallery with institute construction tunnel main tunnel;
To the secondary lining of the first Tunnel structure 14-1 and the first tunnel in region locating for the drain cavern intersection It builds 15-1 and carries out the boring method of aperture and the first Tunnel knot to region locating for intersection after the base tunnel respectively The boring method that structure 14-1 and the first Tunnel Second Lining 15-1 carries out aperture respectively is identical and both for service gallery hole Aperture method;
When carrying out aperture using the service gallery hole aperture method, to first of region locating for the service gallery hole Tunnel structure 14-1 and the first Tunnel Second Lining 15-1 carry out aperture respectively, and process is as follows:
Step A1, the first Tunnel Second Lining aperture: secondary to first tunnel in region locating for the service gallery hole Lining cutting 15-1 carries out aperture, obtains two lining holes;
The structure at two lining hole is identical as the structure at the service gallery hole;
Step A2, the first Tunnel structure aperture: to first tunnel in region locating for the service gallery hole Preliminary bracing structure 14-1 carries out aperture, obtains just branch hole;
The structure at the just branch hole is identical as the structure at the service gallery hole;
Step A3, hole supporting: using circumferential steel arch-shelf to just branch hole carries out supporting, the circumferential direction described in step A2 Steel arch-shelf be to it is described just branch hole carry out tunneling boring supporting support bracket and its structure with it is described at the beginning of the structure at branch hole it is identical.
In the present embodiment, the inclined shaft intersection is the service gallery hole, to oblique since the inclined shaft intersection Before well 13 carries out excavation construction, first the first Tunnel structure 14-1 to region locating for the inclined shaft intersection and the One Tunnel Second Lining 15-1 carries out aperture respectively, obtains the inclined shaft intersection of construction molding.
To the first Tunnel structure 14-1 in region locating for the inclined shaft intersection and the first Tunnel Second Lining The boring method that 15-1 carries out aperture respectively is service gallery hole aperture method.
To ensure stabilized structure, base tunnel supporting construction is provided in the detour base tunnel 1, the base tunnel supporting construction includes At the beginning of the split molding detour base tunnel 1 of digging carries out the third Tunnel structure 14-3 of preliminary bracing and is laid in third tunnel Third Tunnel Second Lining 15-3, the third Tunnel structure 14-3 and third tunnel on the inside of phase supporting construction 14-3 Road secondary lining 15-3 is the supporting construction that tunneling boring supporting is carried out to detour base tunnel 1.It is practical that detour base tunnel 1 is excavated It is split from the front to the back to dig the molding progress of detour base tunnel 1 supporting when construction, and obtain the base tunnel supporting knot of construction molding Structure.
In the present embodiment, the first Tunnel Second Lining 15-1 is reinforced concrete structure, first tunnel initial-stage Supporting construction 14-1 includes that multiple tunneling borings laid from the front to the back and carry out tunneling boring supporting to institute's construction tunnel main tunnel support Frame and the Bolt net and jet preliminary bracing structure that tunneling boring supporting is carried out to institute's construction tunnel main tunnel, multiple tunneling boring support frames Structure snd size are all the same and it is in uniformly distributed, the shape of the tunneling boring support frame and the cross section of institute's construction tunnel main tunnel Shape is identical;The Bolt net and jet preliminary bracing structure is that the preliminary bracing structure of method for protecting support construction molding is sprayed using net, described Net spray preliminary bracing structure includes the steel mesh being mounted in institute's construction tunnel main tunnel and is sprayed in institute's construction tunnel just by one layer The concrete ejection layer that concrete on the inner wall of hole is formed, the steel mesh and the tunneling boring support frame are embedded in described mixed In solidifying soil jetted layers.Fastening company is carried out by multiple longitudinal connecting members between the two neighboring tunneling boring support frame in front and back It connects.
When carrying out the first Tunnel Second Lining aperture in the present embodiment, in step A1, first in the first Tunnel Second Lining 15- Surveying and locating on 1 arch wall, and mark out the excavation contour line at the service gallery hole;Meanwhile marking out two lining hole The excavated sections of the excavation contour line of mouth, two lining hole amplify 20cm (i.e. than the excavated section at the service gallery hole The excavation contour line at two lining hole is located on the outside of the excavation contour line at the service gallery hole and spacing between the two For 20cm), guarantee the reinforcing bar (hereinafter referred to as two lined steel muscle) of the first Tunnel Second Lining 15-1 and the overlap joint of splash guard, using hand It holds cutting machine and ring cutting is carried out to the concrete of the first Tunnel Second Lining 15-1 (hereinafter referred to as two lining concretes), joint-cutting depth 5cm, really Guarantor does not damage two lined steel muscle, uses quartering hammer to abolish two lining concretes after the completion of ring cutting, first cuts intermediate position, two lining hole 20cm is reserved at excavation contour line manually uses pneumatic pick to be cut, it is ensured that the excavation contour line concrete at two lining hole it is neat and Splash guard is not destroyed.After the completion of two lining concretes are abolished, cuts two lined steel muscle and splash guard, two lined steel muscle and splash guard are all made of and cut Cutting mill is cut, and two lined steel muscle and splash guard reserve enough laps of splice, and two lined steel muscle reserve lap of splice 70cm, waterproof Plate reserves lap of splice 60cm.
When carrying out the first Tunnel structure aperture in step A2, the excavated section at the just branch hole is more auxiliary than described Helping the excavated section at tunnel hole to amplify 10cm, (excavation contour line at the just branch hole is located at opening for the service gallery hole Dig on the outside of contour line and spacing between the two be 10cm), the first Tunnel structure 14-1 is first cut using quartering hammer Concrete ejection layer, the protection of two lining reserved steel bars and splash guard is carried out during cutting.
After the concrete ejection layer of the first Tunnel structure 14-1 is cut, the first Tunnel knot is cut The tunneling boring support frame (i.e. just branch steel arch-shelf) in structure 14-1, uses 3m long lock foot anchor tube to original before cutting just branch steel arch-shelf First branch steel arch-shelf is reinforced, while being reinforced using the circumferential steel arch-shelf, and the circumferential direction steel arch-shelf and the auxiliary are cheated The tunneling boring support frame (the tunneling boring support frame after cutting) in region locating for road hole is fastenedly connected, after making cutting The tunneling boring support frame arch springing it is not hanging.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention In the protection scope of art scheme.

Claims (10)

1. one kind is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, it is characterised in that: institute's construction tunnel is just Hole is divided into rear side tunnel construction sections (3), the front side tunnel construction sections (4) being located on front side of rear side tunnel construction sections (3) and is connected to rear side tunnel construction sections (3) Between front side tunnel construction sections (4) and from the inverse middle part tunnel construction sections (5) for rushing rich water tomography (6) and passing through of clastic rock steep dip;Constructed tunnel The same side of road main tunnel is provided with detour base tunnel (1) and drain cavern (2), and the detour base tunnel (1) and drain cavern (2) are for by rear The inverse Tunnel for rushing rich water tomography (6) of clastic rock steep dip is passed through forward;The detour base tunnel (1) be rear side tunnel construction sections (3) with The detour base tunnel of formation is excavated between front side tunnel construction sections (4), the detour base tunnel (1) and institute's construction tunnel main tunnel are laid in together On one horizontal plane;The detour base tunnel (1) is divided into rear side base tunnel section, middle part base tunnel section and front side base tunnel section from the front to the back, described Front side base tunnel section is located on front side of the rear side base tunnel section, and the middle part base tunnel section is connected to the rear side base tunnel section and the front side Between base tunnel section, the middle part base tunnel section is laid with institute's construction tunnel main tunnel in parallel, the rear side base tunnel section rear end and rear side The intersection of tunnel construction sections (3) intersection and the two is intersection, the front side base tunnel section front end and front side tunnel construction sections (4) phase after base tunnel It hands over and the intersection of the two is the preceding intersection of base tunnel;The rear side base tunnel section is located on rear side of middle part tunnel construction sections (5);
The drain cavern (2) includes rear side hole body and is located on front side of the body of the rear side hole and with institute's construction tunnel main tunnel in parallel cloth If front side hole body, front side hole body is located at the upper side of institute's construction tunnel main tunnel and it is located at institute's construction tunnel main tunnel and institute It states between the base tunnel section of middle part, rear side hole body is gradually acclivitous Tunnel body from the front to the back;After the body of the rear side hole End is intersected with rear side tunnel construction sections (3) and the intersection of the two is drain cavern intersection, intersection and the sluicing after the base tunnel Hole intersection is respectively positioned on rear side of middle part tunnel construction sections (5), and the drain cavern intersection and rear side hole body are respectively positioned on the base tunnel Afterwards on rear side of intersection;
Front side hole body is divided into rear portion hole body and breaks on front side of the body of the rear portion hole and across the inverse rich water of rushing of clastic rock steep dip The front drain cavern body of layer (6), the draining of rear portion hole body composition drain cavern (2) in rear side hole body and front side hole body Hole body;
The middle part base tunnel section is divided into rear portion base tunnel section and is located on front side of the rear portion base tunnel section and passes through the inverse punching of clastic rock steep dip The rear portion base tunnel section composition detour of the front base tunnel section of rich water tomography (6), the rear side base tunnel section and the middle part base tunnel section is led Cheat the rear side detour base tunnel section of (1);
When carrying out drainage construction to institute's construction tunnel main tunnel, comprising the following steps:
Step 1: the preliminary excavation construction of rear side tunnel construction sections: from the front to the back along tunnel longitudinal extension, to rear side tunnel construction sections (3) In be located at the drain cavern intersection on rear side of tunnel segment carry out excavation construction;
Step 2: rear side tunnel construction sections excavation construction synchronous with drain cavern scupper body: being excavated to described let out to rear side tunnel construction sections (3) When at the present position of water hole intersection, let out from the front to the back in rear side tunnel construction sections (3) positioned at described along tunnel longitudinal extension Tunnel segment behind water hole intersection and the base tunnel between intersection carries out excavation construction, while from the drain cavern intersection Start to carry out excavation construction to the scupper body of drain cavern (2) from the front to the back;
Step 3: rear side tunnel construction sections, drain cavern scupper body and rear side detour base tunnel segment sync excavation construction: to rear side tunnel construction sections (3) when being excavated to after the base tunnel at the present position of intersection, along tunnel longitudinal extension from the front to the back to rear side tunnel construction sections (3) the tunnel segment on front side of intersection after the base tunnel carries out excavation construction;Meanwhile to the scupper of drain cavern (2) Body continues excavation construction, and leads from the front to the back to the rear side detour of detour base tunnel (1) intersection after the base tunnel It cheats section and carries out excavation construction;
Step 4: front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction: the front drain cavern body by It is respectively multiple construction segments before backward, offers drainage hole group outside a hole in each construction segment;
Drainage hole group includes a row or multi-row arch drainage hole (8) and multiple rows of abutment wall for laying from the front to the back outside each hole Drainage hole (9), multiple rows of arch drainage hole (8) are laid from the front to the back along the longitudinal extension of front side hole body;Every row The arch drainage hole (8) includes multiple arch drainings being laid on the outside of front drain cavern body body arch from left to right Hole (8), each arch drainage hole (8) are to be crept into from the front to the back to the inverse brill rushed in rich water tomography (6) of clastic rock steep dip Hole, the gradually inclination upwards from the front to the back of each arch drainage hole (8);All arches in arch drainage hole (8) described in every row The aperture of portion's drainage hole (8) is laid on the same cross section of front side hole body;
Abutment wall drainage hole (9) described in every row includes that two groups of left and right is symmetrically laid in the front drain cavern body body left and right sides Abutment wall drainage hole (9) on the outside of wall, abutment wall drainage hole (9) described in one group is located at and is constructed in abutment wall drainage hole (9) described in two groups Above tunnel main tunnel, abutment wall drainage hole (9) described in another group is located above detour base tunnel (1);Abutment wall drainage hole (9) described in every group It include multiple abutment wall drainage holes (9) from top to bottom laid, each abutment wall drainage hole (9) is in horizontal layout;Every row The aperture of all abutment wall drainage holes (9) is laid on the same cross section of front side hole body in the abutment wall drainage hole (9); Each abutment wall drainage hole (9) is to be crept into from the front to the back to the inverse drilling rushed in rich water tomography (6) of clastic rock steep dip;
After drain cavern (2) scupper body excavate after the completion of, along tunnel longitudinal extension from the front to the back to drain cavern (2) before Portion's drain cavern body is constructed;
When constructing to the front drain cavern body of drain cavern (2), from the front to the back to multiple institutes in the front drain cavern body It states construction segment to construct respectively, the construction method of multiple construction segments is all the same;
When constructing to construction segment described in any of described front drain cavern body, process is as follows:
Step 401, drainage hole construction: using drilling machine to the arch drainage hole (8) of drainage hole group outside hole described in the construction segment It drills respectively with abutment wall drainage hole (9), obtains drainage hole group outside the hole of construction molding;
Step 402, draining: it is drained by drainage hole group outside hole described in step 401;
Step 403, advanced curtain-grouting: advanced curtain-grouting is carried out to the rock stratum of the construction segment front of tunnel heading, is somebody's turn to do The advanced curtain-grouting ruggedized construction of construction segment;
Step 404, excavation construction: excavation construction is carried out to the construction segment from the front to the back along tunnel longitudinal extension;
After the completion of multiple construction segments in the front drain cavern body are constructed, the construction of drain cavern (2) is completed Journey;
In this step, the front drain cavern body of drain cavern (2) is carried out in work progress, along tunnel, extending direction is right from the front to the back The front base tunnel section of detour base tunnel (1) carries out excavation construction, at the same along tunnel extending direction from the front to the back to institute's construction tunnel just The middle part tunnel construction sections (5) in hole carry out excavation construction.
2. one kind described in accordance with the claim 1 is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, special Sign is: when carrying out subsequent excavation construction to detour base tunnel (1) from the front to the back along tunnel extending direction in step 4, the detour The face of base tunnel (1) is located at the face rear of the front drain cavern body;
Excavation construction is carried out to the middle part tunnel construction sections (5) of institute's construction tunnel main tunnel from the front to the back along tunnel extending direction in step 4 When, the face of the middle part tunnel construction sections (5) is located at the face rear of the front drain cavern body.
3. one kind according to claim 1 or 2 is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, Be characterized in that: the front side tunnel construction sections (4) are divided into the front tunnel construction sections on front side of the preceding intersection of the base tunnel and are located at described Rear portion tunnel construction sections on rear side of the preceding intersection of base tunnel;
When carrying out front drain cavern body construction and detour base tunnel and tunnel main tunnel synchronous construction in step 4, to detour base tunnel (1) after the completion of constructing, from the front to the back the front tunnel construction sections of front side tunnel construction sections (4) excavate along tunnel longitudinal extension and be applied Work, while excavation construction is carried out to the rear portion tunnel construction sections of front side tunnel construction sections (4) from the front to the back along tunnel longitudinal extension.
4. one kind according to claim 1 or 2 is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, It is characterized in that: being provided with tunnel main tunnel supporting construction in institute's construction tunnel main tunnel, the tunnel main tunnel supporting construction includes split Molding institute's construction tunnel main tunnel is dug to carry out the first Tunnel structure (14-1) of preliminary bracing and be laid in the first tunnel The first Tunnel Second Lining (15-1) on the inside of road preliminary bracing structure (14-1), the first Tunnel structure (14- 1) and the first Tunnel Second Lining (15-1) is the supporting construction that tunneling boring supporting is carried out to institute's construction tunnel main tunnel;
Drain cavern supporting construction is provided in the drain cavern (2), the drain cavern supporting construction, which includes that split digging is molding, lets out Water hole (2) carries out the second Tunnel structure (14-2) of preliminary bracing and is laid in the second Tunnel structure The second Tunnel Second Lining (15-2) on the inside of (14-2), the second Tunnel structure (14-2) and the second tunnel two Secondary lining cutting (15-2) is the supporting construction that drain cavern (2) are carried out with tunneling boring supporting;
In step 1, when carrying out excavation construction to rear side tunnel construction sections (3) in step 2 and step 3, along tunnel longitudinal extension It is split from the front to the back to dig molding rear side tunnel construction sections (3) progress supporting, and obtain the tunnel main tunnel supporting construction of construction molding;
When carrying out excavation construction to middle part tunnel construction sections (5) in step 4, scrape out along tunnel longitudinal extension is split from the front to the back The middle part tunnel construction sections (5) of type carry out supporting, and obtain the tunnel main tunnel supporting construction of construction molding;
When carrying out excavation construction to the scupper body of drain cavern (2) in step 2 and step 3, along tunnel longitudinal extension by It is split before backward to dig molding drain cavern (2) progress supporting, and obtain the drain cavern supporting construction of construction molding;
When carrying out excavation construction to each construction segment in step 4, along tunnel, longitudinal extension is split from the front to the back It digs molding drain cavern (2) and carries out supporting, and obtain the drain cavern supporting construction of construction molding;
In step 2 since the drain cavern intersection from the front to the back to the scupper body of drain cavern (2) carry out excavation construction it Before, first to the first Tunnel structure (14-1) in region locating for the drain cavern intersection and the first Tunnel Second Lining (15-1) carries out aperture respectively, obtains the drain cavern intersection of construction molding;
The rear side detour base tunnel section of detour base tunnel (1) is opened from the front to the back intersection after the base tunnel in step 3 Before excavation construction, first to the first Tunnel structure (14-1) in region locating for intersection after the base tunnel and the first tunnel Secondary lining (15-1) carries out aperture respectively, obtains intersection after the base tunnel of construction molding.
5. one kind passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method according to claim 4, special Sign is: the drain cavern (2) and detour base tunnel (1) are the service gallery of institute's construction tunnel main tunnel, are intersected after the base tunnel Mouth, the preceding intersection of the base tunnel and the drain cavern intersection are service gallery hole, and the service gallery hole is auxiliary The intersection that tunnel intersects with institute construction tunnel main tunnel;
To the first Tunnel structure (14-1) in region locating for the drain cavern intersection and the first Tunnel Second Lining (15-1) carries out the boring method of aperture and the first Tunnel knot to region locating for intersection after the base tunnel respectively It is identical and both for service gallery that structure (14-1) carries out the boring method of aperture with the first Tunnel Second Lining (15-1) respectively Hole aperture method;
When carrying out aperture using the service gallery hole aperture method, to first tunnel in region locating for the service gallery hole Preliminary bracing structure (14-1) and the first Tunnel Second Lining (15-1) carry out aperture respectively, and process is as follows:
Step A1, the first Tunnel Second Lining aperture: to first Tunnel Second Lining in region locating for the service gallery hole (15-1) carries out aperture, obtains two lining holes;
The structure at two lining hole is identical as the structure at the service gallery hole;
Step A2, the first Tunnel structure aperture: to first tunnel initial-stage in region locating for the service gallery hole Supporting construction (14-1) carries out aperture, obtains just branch hole;
The structure at the just branch hole is identical as the structure at the service gallery hole;
Step A3, hole supporting: using circumferential steel arch-shelf to just branch hole carries out supporting, the circumferential direction steel arch described in step A2 Frame be to it is described just branch hole carry out tunneling boring supporting support bracket and its structure with it is described at the beginning of the structure at branch hole it is identical.
6. one kind according to claim 1 or 2 is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, It is characterized in that: being provided with inclined shaft (13) on rear side of the drain cavern (2), inclined shaft (13) front end is intersected with institute's construction tunnel main tunnel And the intersection of the two is inclined shaft intersection, the inclined shaft intersection is located on rear side of the drain cavern intersection;The inclined shaft It (13) is the drainage channel for will be discharged out of institute construction tunnel main tunnel from the water that drain cavern (2) is discharged;
When carrying out the rear side preliminary excavation construction of tunnel construction sections in step 1, first along tunnel longitudinal extension from the front to the back to rear side tunnel It is located at the tunnel segment on rear side of the inclined shaft intersection in road section (3) and carries out excavation construction;Institute is excavated to rear side tunnel construction sections (3) After stating inclined shaft intersection present position, then it is described to being located in rear side tunnel construction sections (3) from the front to the back along tunnel longitudinal extension Tunnel segment between inclined shaft intersection and the drain cavern intersection carries out excavation construction, while opening from the inclined shaft intersection Begin to carry out excavation construction to inclined shaft (13);
The arch drainage hole (8) and abutment wall drainage hole (9) are stratum drainage hole;
By when drainage hole group is drained outside hole described in step 401 in step 402, by drainage hole group outside the hole Each stratum drainage hole drains into water in drain cavern (2), then by be located in rear side tunnel construction sections (3) the inclined shaft intersection with it is described Tunnel segment Jiang Shui between drain cavern intersection is drained into inclined shaft (13), arranges water finally by the inclined shaft (13) completed is excavated Out.
7. one kind passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method according to claim 6, special Sign is: is provided with catch pit (7) in the rear side tunnel construction sections (3), the catch pit (7) be located at the drain cavern intersection and Between the inclined shaft intersection;It is provided with gutter in the drain cavern (2), the gutter is prolonged along the longitudinal direction of drain cavern (2) Stretch direction laying;The rear end in the gutter is connected to catch pit (7);
The aperture of each stratum drainage hole is coaxially installed with orifice tube, and the outer end of each orifice tube is inserted into one In a stratum drainage hole, the inner end of each orifice tube is mounted on connecting flange, and each orifice tube inner end is equal It is connect by the connecting flange with the drainpipe for being connected to the gutter;
By passing through what is installed in each stratum drainage hole when drainage hole group is drained outside hole described in step 401 in step 402 The orifice tube drains into water in drainpipe, then is drained into water in the gutter by the drainpipe, and passes through the row Ditch drains into catch pit (7);After the completion of inclined shaft (13) are excavated, the water in catch pit (7) is drained into tiltedly by inclined shaft (13) On the outside of well (13).
8. one kind according to claim 1 or 2 is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, Be characterized in that: the length of multiple construction segments is all the same, and the length of each construction segment is 15m~25m;Before described The front end face of portion's base tunnel section, the front drain cavern body and the middle part tunnel construction sections (5) is respectively positioned on same plane;
The middle part tunnel construction sections (5) along tunnel longitudinal extension from the front to the back be respectively multiple main tunnel segments, it is each it is described just The length of hole segment is identical as the construction length of segment;
Excavation construction is carried out to the middle part tunnel construction sections (5) of institute's construction tunnel main tunnel from the front to the back along tunnel extending direction in step 4 When, excavation construction is carried out respectively to multiple main tunnel segments from the front to the back;The face of each main tunnel segment is respectively positioned on The face rear of the front drain cavern body and horizontal space between the two is identical as the construction length of segment at this time;
The front base tunnel section is respectively multiple base tunnel segments, each base tunnel section along tunnel longitudinal extension from the front to the back The length of section is identical as the construction length of segment;
When carrying out excavation construction to the front base tunnel section of detour base tunnel (1) from the front to the back along tunnel extending direction in step 4, by Excavation construction is carried out respectively to multiple base tunnel segments before backward;The face of each base tunnel segment is respectively positioned on institute at this time It states the face rear of front drain cavern body and horizontal space between the two is identical as the construction length of segment.
9. one kind passes through that clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method according to claim 8, special Sign is: a base tunnel drainage hole group is offered in each base tunnel segment;
Each base tunnel drainage hole group includes a row or multi-row vault drainage hole (18) and multiple rows of side for laying from the front to the back Portion's drainage hole (19), longitudinal extension from the front to the back cloth of multiple rows of vault drainage hole (18) along the front base tunnel section If;Vault drainage hole (18) described in every row includes multiple vaults being laid on the outside of the front base tunnel section arch from left to right Drainage hole (18), each vault drainage hole (18) are to be crept into from the front to the back to clastic rock steep dip is inverse to rush rich water tomography (6) Interior drilling, the gradually inclination upwards from the front to the back of each vault drainage hole (18);Vault drainage hole (18) described in every row In the apertures of all vault drainage holes (18) be laid on the same cross section of the front base tunnel section;
Side drainage hole (19) described in every row include that two groups of left and right is symmetrically laid in abutment wall at left and right sides of the front base tunnel section The side drainage hole (19) in outside, side drainage hole (19) described in every group include multiple side drainage holes from top to bottom laid (19), each side drainage hole (19) is in horizontal layout;All side drainages in side drainage hole (19) described in every row The aperture in hole (19) is laid on the same cross section of the front base tunnel section;Each side drainage hole (19) is served as reasons It is crept into before backward to the inverse drilling rushed in rich water tomography (6) of clastic rock steep dip;
When carrying out excavation construction respectively to multiple base tunnel segments from the front to the back, the excavation construction side of multiple base tunnel segments Method is all the same;
When constructing to base tunnel segment described in any of described front base tunnel section, process is as follows:
Step B1, drainage hole is constructed: using drilling machine to the vault drainage hole (18) of base tunnel drainage hole group described in the base tunnel segment It drills respectively with side drainage hole (19), obtains the base tunnel drainage hole group of construction molding;
Step B2, it drains: being drained by drainage hole group outside hole described in step 401;
Step B3, advanced curtain-grouting: advanced curtain-grouting is carried out to the rock stratum of the base tunnel segment front of tunnel heading, this is obtained and leads Cheat the advanced curtain-grouting ruggedized construction of segment;
Step B4, excavation construction excavation construction: is carried out to the base tunnel segment from the front to the back along tunnel longitudinal extension;
After the completion of multiple equal excavation constructions in base tunnel segment in the front base tunnel section, the front base tunnel section is completed Work progress.
10. one kind according to claim 1 or 2 is passed through, clastic rock steep dip is inverse to rush rich water tomography tunnel drainage construction method, It is characterized by: block wall (10) in a hole, block wall (10) and institute in the hole is arranged in each construction segment rear end It states the perpendicular laying of front side hole body and it is the vertical block wall blocked to front side hole body;
In step 401 carry out drainage hole construction before, need to also the construction segment rear end construct hole in block wall (10), constructed Hole in block wall (10) be located on rear side of the face of the construction segment and the face of itself and the construction segment abuts.
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