CN110242321A - A kind of construction of offspur tunnel large section asymmetric double side wall - Google Patents
A kind of construction of offspur tunnel large section asymmetric double side wall Download PDFInfo
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- CN110242321A CN110242321A CN201910542817.4A CN201910542817A CN110242321A CN 110242321 A CN110242321 A CN 110242321A CN 201910542817 A CN201910542817 A CN 201910542817A CN 110242321 A CN110242321 A CN 110242321A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
Abstract
A kind of construction of offspur tunnel large section asymmetric double side wall, is related to technical field of construction in Tunnel Engineering.It is the following steps are included: large section part is followed successively by left part subregion, middle part subregion, right part subregion along the direction extended perpendicular to tunnel；The construction of left part subregion, left part construct width and main line tunnel it is wide, successively excavate that left part top bar, step and left part are got out of a predicament or an embarrassing situation in left part；Middle part zoned width calculates；Right part subregion is constructed, and step and right part are got out of a predicament or an embarrassing situation in right part top bar of successively constructing, right part；Middle part top bar is successively excavated in subregion construction in middle part when excavation, step and middle part are got out of a predicament or an embarrassing situation in middle part.A kind of construction of above-mentioned offspur tunnel large section asymmetric double side wall solves the problems, such as that offspur tunnel crosses section large section excavation method itself.For modify, supplement improve specification and regulations repair volume, professional standard provides live foundation, for accelerate this aspect research provide a kind of thinking.
Description
Technical field
The present invention relates to technical field of construction in Tunnel Engineering, non-in particular to a kind of offspur tunnel large section
The construction of symmetrical double side wall.
Background technique
The intercommunication of expressway works underground is tunnel structure, the intersection in 2 tunnels, generally 5 lanes (meeting section)
Large section must get through 2 offspur tunnels respectively since offspur tunnel is shorter, subsequently into the disconnected construction of large section.It is above-mentioned
The characteristics of tunnel, is: (1) at doubling, tunnel clearance is different, and 3 tunnel height differences are different at doubling at large section
Sample, and height difference is big；(2) at large section, span is big, is conventional tunnel more than 2 times；(3) at large section, tunnel is high
It spends about 1.6 times higher than conventional tunnel.
5 high, big, wide lane tunnels are jumped in the 2 lane tunnels that intersection is low from height, width is narrow.It constructed
The difficulty of journey is: (1) intersection, which belongs to, leads arcading without in, is most weak construction site, and especially plug part, which most easily causes, collapses
It collapses event；(2) width at large section is greater than both sides, belongs to the construction of " pregnant " section, needs to hew out and effectively apply
It realizes " jump " and crosses in work space；(3) construction period is short, and has to meet economy and efficient principle.The part
Construction is in the discussion stage in the world at present, there is no related engineering method, specification and regulations, there is no mature construction experience that can borrow
Mirror." offspur tunnel large section asymmetric double side wall excavation method " is to belong to innovation, has been successfully used in site operation.
Summary of the invention
The purpose of the present invention is to provide a kind of construction of offspur tunnel large section asymmetric double side wall, bases
Large section feature considers two offspur tunnel section sizes and with reference to general 2 lane tunnel in the poor use of geology country rock
" symmetrical double side wall ", in conjunction with sequence of construction, economically devise " asymmetric double side wall " construction.Solves fork
Tunnel crosses section large section excavation method problem itself.For modify, supplement improve specification and regulations repair volume, professional standard mentions
Live foundation is supplied, worldwide, to provide a kind of thinking to accelerate the research of this aspect.
The embodiment of the present invention is achieved in that
A kind of construction method of the construction of offspur tunnel large section asymmetric double side wall, comprising the following steps:
Construction area planning: large section part is followed successively by left part subregion, middle part along the direction extended perpendicular to tunnel
Area, right part subregion；Wherein, the width of left part subregion and the main line tunnel for connecting left part subregion are wide, left part subregion and middle part
The intersection in area is temporary steel support, its coboundary of left part subregion is permanent bracing members；The maximum width of right part subregion is small
In the fork branch line tunnel with right part piecewise connection, and the width of middle part subregion is greater than safe distance, and safe distance is middle part
The intersection of the lateral minimum range of area's excavation, right part subregion and middle part subregion is temporary steel support, remaining side of right part subregion
Boundary is permanent bracing members；The width of middle part subregion is greater than safe distance, the boundary of middle part subregion and left part subregion, right part subregion
Place is permanent bracing members, its coboundary of middle part subregion is temporary steel support；
The construction of left part subregion: the construction width and main line tunnel of left part subregion are wide, and are followed successively by left part from top to bottom
Step and left part are got out of a predicament or an embarrassing situation in step, left part；Left part top bar is successively excavated when excavation, step and left part are got out of a predicament or an embarrassing situation in left part；
The first branch part of construction simultaneously, and the permanent bracing members on boundary and temporary steel support the lock foot made of ductule in construction are solid
It is scheduled in excavation face；
Subregion construction width in middle part calculates: it is different according to the difference of rock property and its support force ability, it is supervised in conjunction with scene
It controls and is calculated obtained by metric data, obtain the minimum middle part subregion construction width not less than safe distance；
The construction of right part subregion: right part subregion construction width is that the overall width of large section subtracts left part zoned width, is subtracted
The difference of middle part zoned width, right part subregion is followed successively by right part top bar from top to bottom, step and right part are got out of a predicament or an embarrassing situation in right part, opens
Dig that right part top bar of constantly successively constructing, step and right part are got out of a predicament or an embarrassing situation in right part；The first branch part of construction simultaneously, and boundary is permanent
Property bracing members and temporary steel support construction when made of ductule lock foot be fixed in excavation face；
The construction of middle part subregion: middle part subregion is followed successively by that middle part top bar, step and middle part are got out of a predicament or an embarrassing situation in middle part from top to bottom,
Middle part top bar when excavation, step and middle part are got out of a predicament or an embarrassing situation and are successively excavated in middle part；The first branch part of construction simultaneously, temporary steel branch
Support and permanent bracing members the lock foot made of ductule in construction are fixed in excavation face；After the completion of the construction of middle part subregion,
Remove temporary steel support.
Preferably, in construction area planning step, safe distance 4m.
Preferably, in left part subregion construction procedure, left part top bar is reserved with Core Soil, and the length of Core Soil is 3-5m.
Preferably, in left part subregion construction procedure, the length that step and left part are got out of a predicament or an embarrassing situation in left part top bar, left part is equal
8-10 meters.
Preferably, in right part subregion construction procedure, the length that step and right part are got out of a predicament or an embarrassing situation in right part top bar, right part is 8-
10 meters.
Preferably, middle part top bar, the length that step and middle part are got out of a predicament or an embarrassing situation in middle part are 8-10 meters.
Compared with prior art, a kind of construction of offspur tunnel large section asymmetric double side wall of the present invention is beneficial
Effect is: solving the problems, such as that offspur tunnel crosses section large section excavation method itself.Specification and regulations are improved to modify, supplementing
Repair volume, professional standard provides live foundation, for worldwide, provide a kind of think of to accelerate the research of this aspect
Road.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is that the fork of the embodiment of the present invention crosses the structural schematic diagram of section large section tunnel；
Fig. 2 is that the fork of the embodiment of the present invention crosses longitudinal construction area planning chart of section large section tunnel；
Fig. 3 is the longitudinally split figure of left part of embodiment of the present invention subregion；
Fig. 4 is the lateral schematic diagram of left part of embodiment of the present invention subregion construction；
Fig. 5 is the longitudinally split figure of right part of embodiment of the present invention subregion；
Fig. 6 is the lateral schematic diagram of right part of embodiment of the present invention subregion construction；
Fig. 7 is the longitudinally split figure of subregion in the middle part of the embodiment of the present invention；
Fig. 8 is the lateral schematic diagram of subregion construction in the middle part of the embodiment of the present invention.
Icon: 110- branch line tunnel；120- A-road；130- left part subregion；Subregion in the middle part of 140-；150- right part subregion；
160- temporary steel support；The permanent bracing members of 170-；180- excavates direction of advance；190- length L；191- length D；111- main line
Tunnel；112- fork branch line tunnel；Five lane 121-；122- Four-Lane Road；131- left part top bar；Step in 132- left part；
133- left part is got out of a predicament or an embarrassing situation；134- Core Soil；Top bar in the middle part of 141-；Step in the middle part of 142-；It gets out of a predicament or an embarrassing situation in the middle part of 143-；151- is right
Portion's top bar；Step in 152- right part；153- right part is got out of a predicament or an embarrassing situation.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " on ", " in ", "lower", the instructions such as "left", "right" side
Position or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when the side usually put
Position or positional relationship, are merely for convenience of description of the present invention and simplification of the description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Have below to a kind of construction of offspur tunnel large section asymmetric double side wall of the embodiment of the present invention
Body explanation.
The embodiment of the present invention proposes a kind of construction of offspur tunnel large section asymmetric double side wall, including following step
It is rapid:
Construction area planning: large section part is followed successively by left part subregion, middle part along the direction extended perpendicular to tunnel
Area, right part subregion；Wherein, the width of left part subregion and the main line tunnel for connecting left part subregion are wide, left part subregion and middle part
The intersection in area is temporary steel support, its coboundary of left part subregion is permanent bracing members；The maximum width of right part subregion is small
In the fork branch line tunnel with right part piecewise connection, and the width of middle part subregion is greater than safe distance, and safe distance is middle part
The intersection of the lateral minimum range of area's excavation, right part subregion and middle part subregion is temporary steel support, remaining side of right part subregion
Boundary is permanent bracing members；The width of middle part subregion is greater than safe distance, the boundary of middle part subregion and left part subregion, right part subregion
Place is permanent bracing members, its coboundary of middle part subregion is temporary steel support；
Further, in a preferred embodiment of the present invention, in construction area planning step, safe distance 4m.General
In the case where, safe distance is the safety that 4m can guarantee middle part subregion work progress.
The construction of left part subregion: the construction width and main line tunnel of left part subregion are wide, and are followed successively by left part from top to bottom
Step and left part are got out of a predicament or an embarrassing situation in step, left part；Left part top bar is successively excavated when excavation, step and left part are got out of a predicament or an embarrassing situation in left part；
The first branch part of construction simultaneously, and the permanent bracing members on boundary and temporary steel support the lock foot made of ductule in construction are solid
It is scheduled in excavation face；
Further, in a preferred embodiment of the present invention, in left part subregion construction procedure, left part top bar is reserved with core
Soil, the length of Core Soil are 3-5m.Reserved Core Soil can guarantee the safety of entire work progress.
Further, in a preferred embodiment of the present invention, in left part subregion construction procedure, platform in left part top bar, left part
The length that rank and left part are got out of a predicament or an embarrassing situation is equal 8-10 meters.By the length setting that step and left part are got out of a predicament or an embarrassing situation in left part top bar, left part
Both facilitate excavation for 8-10 meters, and in turn ensures construction safety.
Subregion construction width in middle part calculates: it is different according to the difference of rock property and its support force ability, it is supervised in conjunction with scene
It controls and is calculated obtained by metric data, obtain the minimum middle part subregion construction width not less than safe distance；
The construction of right part subregion: right part subregion construction width is that the overall width of large section subtracts left part zoned width, is subtracted
The difference of middle part zoned width, right part subregion is followed successively by right part top bar from top to bottom, step and right part are got out of a predicament or an embarrassing situation in right part, opens
Dig that right part top bar of constantly successively constructing, step and right part are got out of a predicament or an embarrassing situation in right part；The first branch part of construction simultaneously, and boundary is permanent
Property bracing members and temporary steel support construction when made of ductule lock foot be fixed in excavation face；
Further, in a preferred embodiment of the present invention, in right part subregion construction procedure, platform in right part top bar, right part
The length that rank and right part are got out of a predicament or an embarrassing situation is 8-10 meters.8- is set by the length of getting out of a predicament or an embarrassing situation of step and right part in right part top bar, right part
10 meters had both facilitated excavation, in turn ensured construction safety.
The construction of middle part subregion: middle part subregion is followed successively by that middle part top bar, step and middle part are got out of a predicament or an embarrassing situation in middle part from top to bottom,
Middle part top bar when excavation, step and middle part are got out of a predicament or an embarrassing situation and are successively excavated in middle part；The first branch part of construction simultaneously, temporary steel branch
Support and permanent bracing members the lock foot made of ductule in construction are fixed in excavation face；After the completion of the construction of middle part subregion,
Remove temporary steel support.
Further, in a preferred embodiment of the present invention, in middle part subregion construction procedure, platform in middle part top bar, middle part
The length that rank and middle part are got out of a predicament or an embarrassing situation is 8-10 meters.The length that step and middle part are got out of a predicament or an embarrassing situation in middle part top bar, middle part is set as 8-
10 meters had both facilitated excavation, in turn ensured construction safety.
Embodiment 1
Fig. 1 is please referred to, the present embodiment is related to section large section tunnel that crosses that diverges, and is that expressway works tunnel underground is mutual
Logical offspur tunnel crosses section, is large section tunnel made of being crossed as branch line tunnel 110 and A-road 120.Above-mentioned tunnel is high
Degree is high, and junction tunnel High Defferential is big, and influence factor is more, complicated construction technique, needs to solve the problems, such as multiple Technology Difficulties.Its
In, A-road 120 includes five lanes 121 and Four-Lane Road 122.Branch line tunnel 110 includes main line tunnel 111 and fork branch line tunnel
112。
The present invention provides a kind of construction of offspur tunnel large section asymmetric double side wall, solves offspur tunnel friendship
Remittance section large section excavation method problem comprising following steps itself:
Referring to figure 2., construction area is planned: large section part is divided into a left side along the direction extended perpendicular to tunnel
Part area 130, middle part subregion 140 and right part subregion 150.Wherein, the width of left part subregion 130 with connect left part subregion 130
Main line tunnel 111 is wide.The intersection of left part subregion 130 and middle part subregion 140 is temporary steel support 160, left part subregion 130
Its coboundary is permanent bracing members 170.The maximum width of right part subregion 150 is less than the fork branch connecting with right part subregion 150
Threaded list road 112, and the width of middle part subregion 140 is greater than safe distance, above-mentioned safe distance excavates lateral for middle part subregion 140
Minimum range.Specifically, in the present embodiment, the width of safe distance 4m, middle part subregion 140 are greater than 4m.Right part subregion 150
Intersection with middle part subregion 140 is temporary steel support 160, its coboundary of right part subregion 150 is permanent bracing members 170；
The width of middle part subregion 140 is greater than safe distance, and middle part subregion 140 and the intersection of left part subregion 130, right part subregion 150 are
Permanent bracing members 170, its coboundary of middle part subregion 140 are temporary steel support 160.
It constructs referring to figure 3. with Fig. 4, left part subregion 130: construction width and main line tunnel 111 of left part subregion 130 etc.
Width, and be followed successively by left part top bar 131 from top to bottom, step 132 and left part are got out of a predicament or an embarrassing situation 133, and left part top bar in left part
131, in left part step 132 and left part get out of a predicament or an embarrassing situation 133 length L190 be equal 8-10 meters；When excavation, along excavation direction of advance 180
Successively excavate that left part top bar 131, step 132 and left part get out of a predicament or an embarrassing situation 133 in left part, and left part top bar 131 is reserved with core
Soil 134, length D191 are 3-5m；Construction just branch part, and the permanent bracing members 170 and temporary steel support on boundary simultaneously
160 lock foot in construction made of ductule is fixed in excavation face.
The construction width of middle part subregion 140 calculates: it is different according to the difference of rock property and its support force ability, in conjunction with scene
It is calculated obtained by monitoring and measurement data, obtains the minimum construction width of middle part subregion 140 not less than safe distance；In the present embodiment
Safe distance is 4m, in other embodiments, can be different according to the difference and its support force ability of rock property, specific to calculate
The size of safe distance.
Referring to figure 5. with Fig. 6, the construction of right part subregion 150: the construction width of right part subregion 150 is the overall width of large section
130 width of left part subregion is subtracted, the difference of middle part 140 width of subregion is subtracted, right part subregion 150 is followed successively by right part from top to bottom
Step 152 and right part get out of a predicament or an embarrassing situation 153 in step 151, right part, and step 152 and right part are left office in right part top bar 151, right part
The length L190 of rank 153 is 8-10 meters.Excavate that right part top bar 151 of constantly successively constructing, step 152 and right part are left office in right part
Rank 153；The just branch part, and the permanent bracing members 170 on boundary and temporary steel support 160 ductule in construction of construction simultaneously
Manufactured lock foot is fixed in excavation face；
Please refer to Fig. 7 and Fig. 8, middle part subregion 140 is constructed: middle part subregion 140 is followed successively by middle part top bar from top to bottom
141, step 142 and middle part get out of a predicament or an embarrassing situation 143 in middle part, and step 142 and middle part get out of a predicament or an embarrassing situation 143 in middle part top bar 141, middle part
Length L190 be 8-10 meters.Middle part top bar 141 when excavation, step 142 and middle part are got out of a predicament or an embarrassing situation and 143 are successively opened in middle part
It digs；Just branch part, temporary steel support 160 and permanent bracing members 170 lock foot in construction made of ductule for construction simultaneously
It is fixed in excavation face；After the completion of middle part subregion 140 is constructed, temporary steel support 160 is removed.
In conclusion the present invention provides a kind of construction of offspur tunnel large section asymmetric double side wall, basis
Large section feature considers two offspur tunnel section sizes and with reference to general 2 lane tunnel in the poor use of geology country rock
" symmetrical double side wall ", in conjunction with sequence of construction, economically devise " asymmetric double side wall " construction.Solves fork
Tunnel crosses section large section excavation method problem itself.For modify, supplement improve specification and regulations repair volume, professional standard mentions
Live foundation is supplied, worldwide, to provide a kind of thinking to accelerate the research of this aspect.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of construction of offspur tunnel large section asymmetric double side wall, which is characterized in that itself the following steps are included:
Construction area planning: large section part is followed successively by left part subregion, middle part subregion, the right side along the direction extended perpendicular to tunnel
Part area；Wherein, the width of the left part subregion and the main line tunnel for connecting the left part subregion are wide, the left part subregion with
The intersection of the middle part subregion is temporary steel support, its coboundary of the left part subregion is permanent bracing members；The right side
The maximum width in part area is less than the fork branch line tunnel with the right part piecewise connection, and the width of the middle part subregion is greater than
Safe distance, the safe distance are that the middle part subregion excavates lateral minimum range, the right part subregion and the middle part
The intersection of subregion is temporary steel support, its coboundary of the right part subregion is permanent bracing members；The middle part subregion
Width is greater than safe distance, the middle part subregion and the left part subregion, the right part subregion intersection be permanent steel branch
Support, its coboundary of the middle part subregion are temporary steel support；
Left part subregion construction: the construction width and main line tunnel of left part subregion are wide, and be followed successively by from top to bottom left part top bar,
Step and left part are got out of a predicament or an embarrassing situation in left part；The left part top bar is successively excavated when excavation, step and the left part in the left part
It gets out of a predicament or an embarrassing situation；The first branch part of construction simultaneously, and the permanent bracing members on boundary and temporary steel support are made in construction of ductule
Lock foot be fixed in excavation face；
Subregion construction width in middle part calculates: it is different according to the difference of rock property and its support force ability, in conjunction with on-site supervision amount
It is calculated obtained by measured data, obtains the minimum middle part subregion construction width not less than safe distance；
The construction of right part subregion: right part subregion construction width is that the overall width of large section subtracts left part zoned width, subtracts middle part
The difference of zoned width, the right part subregion is followed successively by right part top bar from top to bottom, step and right part are got out of a predicament or an embarrassing situation in right part, opens
Digging constantly successively construct the right part top bar, step and the right part are got out of a predicament or an embarrassing situation in the right part；The first branch part of construction simultaneously,
And the permanent bracing members and temporary steel support on boundary lock foot made of ductule in construction are fixed in excavation face；
The construction of middle part subregion: the middle part subregion is followed successively by that middle part top bar, step and middle part are got out of a predicament or an embarrassing situation in middle part from top to bottom,
Middle part top bar when excavation, step and the middle part are got out of a predicament or an embarrassing situation and are successively excavated in the middle part；It constructs and just props up simultaneously
Part, the temporary steel support and the permanent bracing members lock foot made of ductule in construction are fixed on excavation face
On；After the completion of the middle part subregion construction, temporary steel support is removed.
2. the construction of offspur tunnel large section asymmetric double side wall according to claim 1, which is characterized in that described
In construction area planning step, safe distance 4m.
3. the construction of offspur tunnel large section asymmetric double side wall according to claim 1, which is characterized in that described
In left part subregion construction procedure, the left part top bar is reserved with Core Soil, and the length of the Core Soil is 3-5m.
4. the construction of offspur tunnel large section asymmetric double side wall according to claim 2, which is characterized in that described
In left part subregion construction procedure, the length that step and the left part are got out of a predicament or an embarrassing situation in the left part top bar, the left part is equal 8-
10 meters.
5. the construction of offspur tunnel large section asymmetric double side wall according to claim 1, which is characterized in that described
In right part subregion construction procedure, the length that step and the right part are got out of a predicament or an embarrassing situation in the right part top bar, the right part is 8-10
Rice.
6. the construction of offspur tunnel large section asymmetric double side wall according to claim 1, which is characterized in that described
In the subregion construction procedure of middle part, the length that step and the middle part are got out of a predicament or an embarrassing situation in the middle part top bar, the middle part is 8-10
Rice.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810187A (en) * | 2020-07-20 | 2020-10-23 | 中国路桥工程有限责任公司 | Urban non-center pilot tunnel bifurcation tunnel turning construction method |
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