CN206174963U - Cross shallow undercut tunnel supporting construction of burying of ground fissure crushed zone - Google Patents

Cross shallow undercut tunnel supporting construction of burying of ground fissure crushed zone Download PDF

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Publication number
CN206174963U
CN206174963U CN201621164153.0U CN201621164153U CN206174963U CN 206174963 U CN206174963 U CN 206174963U CN 201621164153 U CN201621164153 U CN 201621164153U CN 206174963 U CN206174963 U CN 206174963U
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China
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tunnel
arch
shallow
supporting construction
lining
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Inventor
万昌盛
梁缄鑫
宁振国
曹佳斌
李朝成
冯艳娜
刘晓宁
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Fifth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
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Fifth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
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Abstract

The utility model discloses a cross shallow undercut tunnel supporting construction of burying of ground fissure crushed zone, including tunnel initial stage supporting construction and tunnel secondary lining, tunnel hole hunch portion top is provided with the advanced small pipe grouting reinforced structure, tunnel initial stage supporting construction including spray first shotcrete on the inner wall of tunnel hole spray the grid steelframe, the one deck that layer, many pin go on supporting forward to the tunnel hole after by hang the dress on the inner wall of tunnel hole the reinforcing bar net and spray back shotcrete on just shotcrete sprays the layer and spray the layer, many pin grid steelframe and reinforcing bar net all are fixed in just shotcrete and spray between layer and the back shotcrete injection layer, tunnel secondary lining arch wall lining cutting and tunnel invert has laid one deck concrete protection layer for concrete lining and its include between and the tunnel initial stage supporting construction. The utility model has the advantages of simple structure and reasonable design and construction convenience, excellent in use effect can go on fast, effectively strut the tunnel hole that the excavation was accomplished, and supporting construction is firm, reliable.

Description

Cross the shallow-depth-excavation tunnel supporting construction of ground fissure crushed zone
Technical field
This utility model belongs to technical field of tunnel construction, more particularly, to a kind of shallow buried covered excavation for crossing ground fissure crushed zone Tunnel support structure.
Background technology
Ground fissure is the abbreviation of ground fractures, is top stratum, the soil body in natural cause(Crustal motion, effect of water etc.) Or anthropic factor(Draw water, irrigate, excavate)Under effect, cracking is produced, and the crack of certain length and width is formed on ground A kind of macroscopical earth's surface breakoff phenomenon.Crushed zone refers to the rock band destroyed by unoriented breach and crack;Crack may By mineral-filled, in netted venation, it is also possible to be roughly equivalent to fracture belt.Ground fissure crushed zone refers to band ground fissure(I.e. There is crack in face)Crushed zone.
Subway tunnel is constructed for cut and cover method using shallow burial hidden digging, with removal cost is low, traffic impact is little The advantages of, relative to shield construction, there is stronger adaptability to stratum, it is adaptable to various sectional forms, with low cost, throw The advantages of entering little.As China carries out Construction of Urban Rail Traffic on a large scale, Dryopteris sublaetaChing et Hsu is constructed in city underground engineering In status will be further important, especially the construction technology of bored tunnel passing through building, structures, need to control into hole tunnel Stability indicator and ground settlement figureofmerit.The geological condition of ground fissure crushed zone is poor and can not form nature arch, excavates When be susceptible to cave in, roof fall situation, add ground fissure position rich groundwater, excavate and just a construction risk is very big, just As foundation bearing capacity is not enough after the completion of, the cracking of preliminary bracing is likely to result in, two lining waterproof layers are destroyed, xoncrete structure Due to vertical displacement, horizontal tensioning and twisting, destroy the liner structure of molding.How to ensure to prop up at the beginning of tunnel excavation and pass through Ground fissure, it is ensured that the stable and waterproof effect of two lining structures is the difficult point of engineering.But nowadays, cross the shallow embedding of ground fissure crushed zone It is available for reference construction information considerably less in terms of bored tunnel construction, especially the shallow-depth-excavation tunnel to ground fissure crushed zone excessively When tunnel support is carried out in digging process, do not have a set of standard, the arrangement and method for construction of specification is available for following.Thus, one kind need to be designed The shallow-depth-excavation tunnel supporting construction of the good mistake ground fissure crushed zone of simple structure, reasonable in design and easy construction, using effect, The Tunnel that completes of excavation can be carried out quickly, effective support.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, there is provided a kind of to cross ground The shallow-depth-excavation tunnel supporting construction of crack crushed zone, its simple structure, reasonable in design and easy construction, using effect are good, energy The Tunnel that completes of excavation is carried out quickly, effective support, supporting construction is firm, reliably.
To solve above-mentioned technical problem, the technical solution adopted in the utility model is:It is a kind of to cross the shallow of ground fissure crushed zone Bury bored tunnel supporting construction, it is characterised in that:Preliminary bracing is carried out including the Tunnel to constructed shallow-depth-excavation tunnel Tunnel structure and the Tunnel Second Lining being laid on the inside of Tunnel structure, set above the arch of Tunnel It is equipped with per-fore pouring liquid with small pipe ruggedized construction;The Tunnel structure and Tunnel Second Lining are and Tunnel are carried out The tunnel support structure of tunneling boring supporting;The Tunnel structure includes the first spray coagulation being injected on Tunnel inwall Grid steel frame that native jetted layers, many Pin are supported to Tunnel from the front to the back, one layer of reinforcing bar being mounted on Tunnel inwall Net and the rear pneumatically placed concrete jetted layers being injected in the just pneumatically placed concrete jetted layers, the bar-mat reinforcement are located at grid described in many Pin On the inside of steelframe, grid steel frame described in many Pin and the bar-mat reinforcement are both secured to the just pneumatically placed concrete jetted layers and are mixed with the rear spray Between solidifying soil jetted layers;The longitudinal extension of the structure all same of grid steel frame described in many Pin and its constructed shallow-depth-excavation tunnel in edge Direction is laid from the front to the back, and grid steel frame described in per Pin is laid along the transverse width direction of Tunnel;Lattice described in per Pin The tunnel bottom that grid steelframe includes the arch wall bracing frame being supported to the arch wall of Tunnel and is supported to Tunnel bottom Portion's bracing frame, the tunnel bottom bracing frame be located at the arch wall bracing frame underface, the two of the tunnel bottom bracing frame Hold the left and right sides lower end with the arch wall bracing frame to be fastenedly connected to be integrated;The Tunnel Second Lining be concrete lining and Its tunnel inverted arch for including the arch wall lining cutting being supported to the arch wall of Tunnel and Tunnel bottom being supported, the tunnel Road inverted arch is located at the underface of the arch wall lining cutting and the two pours and is integrated;The tunnel inverted arch and the Tunnel A layer concrete protective layer is laid between structure.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:The Tunnel knot Waterproof layer is equipped between structure and Tunnel Second Lining, the waterproof layer is located on the inside of concrete cover.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:Grid steel described in adjacent two Pin Between frame by multiple tracks along constructed shallow-depth-excavation tunnel longitudinal extension direction laying longitudinally connected reinforcing bar be fastenedly connected for Integrally.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:The per-fore pouring liquid with small pipe Ruggedized construction is divided into multiple reinforcing sections from the front to the back along the longitudinal extension direction of Tunnel, and two neighboring described reinforcing is saved in front and back The lap of splice between section is not less than 1m;Each described reinforcing sections includes two rows advanced tubule, often arranges described super Front ductule includes many advanced tubules being laid in above Tunnel arch from left to right, the length of the advanced tubule Spend for 2m~3m and its a diameter of Φ 40mm~Φ 45mm.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:The advanced tubule is arranged often In many advanced tubules in uniform laying, often arrange adjacent two advanced tubules in the advanced tubule Circumferential distance be 0.25m~0.35m.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:Advanced tubule described in two rows Respectively upper row's ductule and the lower row's ductule below upper row's ductule are little in advance in upper row's ductule to lead The outer limb of pipe is 30 °, and in upper row's ductule, the outer limb of advanced tubule is 10 °.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:The concrete cover is Pea gravel concreten protective layer and its thickness are 60mm~80mm.
The above-mentioned shallow-depth-excavation tunnel supporting construction for crossing ground fissure crushed zone, is characterized in that:The Tunnel knot Structure also includes multiple suspension roof support structures for carrying out supporting from the front to the back to Tunnel arch, and each described suspension roof support structure is equal Including many anchor poles for being laid in Tunnel arch from left to right.
This utility model has advantages below compared with prior art:
1st, simple structure, reasonable in design and easy construction, input construction cost are relatively low.
2nd, reasonable in design, using effect be good and supporting status safety, reliability, can ensure that shallow-depth-excavation tunnel is excavated and applies Work process is quick, be smoothed out, and including Tunnel structure and Tunnel Second Lining, is provided with above the arch of Tunnel Per-fore pouring liquid with small pipe ruggedized construction, Tunnel structure and Tunnel Second Lining are and Tunnel is carried out tunneling boring The tunnel support structure of shield;Tunnel structure includes just pneumatically placed concrete jetted layers, many Pin grid steel frames, one layer of bar-mat reinforcement With rear pneumatically placed concrete jetted layers, Tunnel Second Lining is for concrete lining and which includes arch wall lining cutting and tunnel inverted arch, and tunnel is faced upward A layer concrete protective layer is laid between arch and Tunnel structure, the Tunnel structure design for being adopted is closed Reason, and foundation bearing capacity just effectively can strengthen after the completion of Tunnel, while below Tunnel structure and tunnel Concrete cover is laid between inverted arch, Tunnel structure is less prone to cracking, so as to waterproof effect is effectively ensured.
3rd, it is widely applicable, it is adaptable to when building urban subway tunnel in ancient soil, silty clay stratum, to pass through ground fissure The construction process of shallow buried sub-surface excavated tunnel of crushed zone.
In sum, this utility model simple structure, reasonable in design and easy construction, using effect are good, can be to having excavated Into Tunnel carry out quickly, effective support, supporting construction is firm, reliable.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Description of reference numerals:
1-Tunnel structure;2-Tunnel Second Lining;3-Tunnel;
4-waterproof layer;5-concrete cover;6-advanced tubule.
Specific embodiment
As shown in figure 1, this utility model includes the tunnel that preliminary bracing is carried out to the Tunnel 3 of constructed shallow-depth-excavation tunnel Road preliminary bracing structure 1 and the Tunnel Second Lining 2 being laid on the inside of Tunnel structure 1, above the arch of Tunnel 3 It is provided with per-fore pouring liquid with small pipe ruggedized construction;The Tunnel structure 1 and Tunnel Second Lining 2 are to Tunnel 3 tunnel support structures for carrying out tunneling boring supporting;The Tunnel structure 1 includes being injected on 3 inwall of Tunnel Grid steel frame that just pneumatically placed concrete jetted layers, many Pin are supported to Tunnel 3 from the front to the back, one layer be mounted in Tunnel 3 Bar-mat reinforcement and the rear pneumatically placed concrete jetted layers being injected in the just pneumatically placed concrete jetted layers on wall, the bar-mat reinforcement is located at many On the inside of grid steel frame described in Pin, grid steel frame described in many Pin and the bar-mat reinforcement be both secured to the just pneumatically placed concrete jetted layers with Between the rear pneumatically placed concrete jetted layers;The structure all same of grid steel frame described in many Pin and its constructed shallow-depth-excavation tunnel in edge Longitudinal extension direction lay from the front to the back, laid along the transverse width direction of Tunnel 3 per grid steel frame described in Pin; Grid steel frame described in per Pin includes the arch wall bracing frame being supported to the arch wall of Tunnel 3 and 3 bottom of Tunnel is carried out The tunnel bottom bracing frame of support, the tunnel bottom bracing frame are located at the underface of the arch wall bracing frame, the tunnel bottom The two ends of portion's bracing frame are fastenedly connected with the left and right sides lower end of the arch wall bracing frame and are integrated;The Tunnel Second Lining 2 For concrete lining and it include the arch wall lining cutting being supported to the arch wall of Tunnel 3 and 3 bottom of Tunnel be supported Tunnel inverted arch, the tunnel inverted arch be located at the arch wall lining cutting underface and the two pour and be integrated;The tunnel inverted arch A layer concrete protective layer 5 is laid between the Tunnel structure 1.
In the present embodiment, waterproof layer 4 between the Tunnel structure 1 and Tunnel Second Lining 2, is equipped with, it is described Waterproof layer 4 is located on the inside of concrete cover 5.
In the present embodiment, the waterproof layer 4 is the thick EVA splash guards of 1.5mm.
When actually used, the waterproof layer 4 can also be other types of splash guard.
In the present embodiment, by the longitudinal direction of the constructed shallow-depth-excavation tunnel in multiple tracks edge between grid steel frame described in adjacent two Pin The longitudinally connected reinforcing bar that bearing of trend is laid is fastenedly connected and is integrated.
As shown in figure 1, the per-fore pouring liquid with small pipe ruggedized construction is divided from the front to the back along the longitudinal extension direction of Tunnel 3 For multiple reinforcing sections, the two neighboring lap of splice reinforced between sections is not less than 1m in front and back;Each described reinforcing is saved Duan Jun includes two rows advanced tubule 6, often arranges the advanced tubule 6 and is laid in Tunnel from left to right including many Advanced tubule 6 above 3 arch, the length of the advanced tubule 6 is 2m~3m and its a diameter of Φ 40mm~Φ 45mm.
In the present embodiment, many advanced tubules 6 in the advanced tubule 6 are often arranged in uniform laying, often The circumferential distance for arranging adjacent two advanced tubules 6 in the advanced tubule 6 is 0.25m~0.35m.
The respectively upper row's ductule of advanced tubule 6 described in the two rows and lower row below upper row's ductule is little leads Pipe, in upper row's ductule, the outer limb of advanced tubule 6 is 30 °, the extrapolation of advanced tubule 6 in upper row's ductule Angle is 10 °.
During practice of construction, the concrete cover 5 is pea gravel concreten protective layer and its thickness is 60mm~80mm.
In the present embodiment, the thickness of the concrete cover 5 is 70mm.During practice of construction, can be according to concrete need Will, the thickness of concrete cover 5 is adjusted accordingly.
In the present embodiment, the Tunnel structure 1 also carries out propping up to 3 arch of Tunnel including multiple from the front to the back The suspension roof support structure of shield, each described suspension roof support structure include many anchors for being laid in 3 arch of Tunnel from left to right Bar.The bar-mat reinforcement below 3 arch of Tunnel is fixed on the anchor pole.
During practice of construction, from the front to the back the Tunnel 3 of constructed shallow-depth-excavation tunnel is excavated, it is same in digging process Step sprays a layer concrete from the front to the back on 3 inwall of Tunnel for excavating molding, and obtains Tunnel structure 1; Afterwards, the grid steel frame is installed from the front to the back, and the bar-mat reinforcement is mounted;Subsequently, spray in the just pneumatically placed concrete One layer concrete of fill-before-fire on layer is penetrated, the rear pneumatically placed concrete jetted layers are obtained, Tunnel process is completed, tunnel is obtained Preliminary bracing structure 1.Then, in 1 bottom of Tunnel structure construction concrete cover 5, and waterproof layer 4 is applied Work.
During preliminary bracing is carried out to Tunnel 3, using tunnel lining trolley from the front to the back in the tunnel that completes of constructing 1 inner side construction tunnel secondary lining 2 of road preliminary bracing structure.
The above, is only preferred embodiment of the present utility model, not this utility model is imposed any restrictions, every Any simple modification, change and equivalent structure change above example made according to this utility model technical spirit, still Belong in the protection domain of technical solutions of the utility model.

Claims (8)

1. it is a kind of cross ground fissure crushed zone shallow-depth-excavation tunnel supporting construction, it is characterised in that:Including dark to constructed shallow embedding The Tunnel (3) holed carries out the Tunnel structure (1) of preliminary bracing and is laid in Tunnel structure (1) The Tunnel Second Lining (2) of inner side, is provided with per-fore pouring liquid with small pipe ruggedized construction above the arch of Tunnel (3);The tunnel Road preliminary bracing structure (1) and Tunnel Second Lining (2) are the tunnel support knot that tunneling boring supporting is carried out to Tunnel (3) Structure;The Tunnel structure (1) including the first pneumatically placed concrete jetted layers, many Pin being injected on Tunnel (3) inwall by The grid steel frame that Tunnel (3) is supported before backward, one layer of bar-mat reinforcement being mounted on Tunnel (3) inwall and it is injected in Rear pneumatically placed concrete jetted layers in the just pneumatically placed concrete jetted layers, the bar-mat reinforcement are located on the inside of grid steel frame described in many Pin, Grid steel frame described in many Pin and the bar-mat reinforcement are both secured to the just pneumatically placed concrete jetted layers and are sprayed with the rear pneumatically placed concrete Between layer;The longitudinal extension direction of the structure all same of grid steel frame described in many Pin and its constructed shallow-depth-excavation tunnel in edge is by rear Lay forward, transverse width direction of the grid steel frame along Tunnel (3) described in per Pin is laid;Grid steel frame described in per Pin The tunnel bottom for including the arch wall bracing frame being supported to the arch wall of Tunnel (3) and Tunnel (3) bottom being supported Portion's bracing frame, the tunnel bottom bracing frame be located at the arch wall bracing frame underface, the two of the tunnel bottom bracing frame Hold the left and right sides lower end with the arch wall bracing frame to be fastenedly connected to be integrated;The Tunnel Second Lining (2) is concrete lining Build and its tunnel for including the arch wall lining cutting being supported to the arch wall of Tunnel (3) and Tunnel (3) bottom being supported Inverted arch, the tunnel inverted arch is located at the underface of the arch wall lining cutting and the two pours and is integrated;The tunnel inverted arch with it is described A layer concrete protective layer (5) is laid between Tunnel structure (1).
2. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 1, it is characterised in that:It is described Waterproof layer (4) is equipped between Tunnel structure (1) and Tunnel Second Lining (2), the waterproof layer (4) is positioned at coagulation On the inside of protective soil layer (5).
3. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 1 or 2, it is characterised in that: The longitudinal direction laid along the longitudinal extension direction of constructed shallow-depth-excavation tunnel by multiple tracks between grid steel frame described in adjacent two Pin Connection reinforcing bar is fastenedly connected and is integrated.
4. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 1 or 2, it is characterised in that: The per-fore pouring liquid with small pipe ruggedized construction is divided into multiple reinforcing sections from the front to the back along the longitudinal extension direction of Tunnel (3), The two neighboring lap of splice reinforced between sections is not less than 1m in front and back;Each described reinforcing sections includes two rows Advanced tubule (6), often arranges the advanced tubule (6) and is laid in above Tunnel (3) arch from left to right including many Advanced tubule (6), the length of the advanced tubule (6) is 2m~3m and its a diameter of Φ 40mm~Φ 45mm.
5. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 4, it is characterised in that:Often arrange The many advanced tubules (6) in the advanced tubule (6) in uniform laying, often arrange the advanced tubule (6) In adjacent two advanced tubules (6) circumferential distance be 0.25m~0.35m.
6. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 5, it is characterised in that:Two rows The respectively upper row's ductule of the advanced tubule (6) and the lower row's ductule below upper row's ductule, it is described on In row's ductule, the outer limb of advanced tubule (6) is 30 °, and in upper row's ductule, the outer limb of advanced tubule (6) is 10°。
7. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 1 or 2, it is characterised in that: The concrete cover (5) is for pea gravel concreten protective layer and its thickness is 60mm~80mm.
8. according to the shallow-depth-excavation tunnel supporting construction of the mistake ground fissure crushed zone described in claim 1 or 2, it is characterised in that: The Tunnel structure (1) also includes multiple suspension roof support knots for carrying out supporting from the front to the back to Tunnel (3) arch Structure, each described suspension roof support structure include many anchor poles for being laid in Tunnel (3) arch from left to right.
CN201621164153.0U 2016-10-31 2016-10-31 Cross shallow undercut tunnel supporting construction of burying of ground fissure crushed zone Active CN206174963U (en)

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Application Number Priority Date Filing Date Title
CN201621164153.0U CN206174963U (en) 2016-10-31 2016-10-31 Cross shallow undercut tunnel supporting construction of burying of ground fissure crushed zone

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Application Number Priority Date Filing Date Title
CN201621164153.0U CN206174963U (en) 2016-10-31 2016-10-31 Cross shallow undercut tunnel supporting construction of burying of ground fissure crushed zone

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915720A (en) * 2018-07-15 2018-11-30 中铁二十局集团有限公司 A kind of large cross-section tunnel passes through fault belt construction method
CN111140237A (en) * 2020-01-08 2020-05-12 合肥市轨道交通集团有限公司 Underground excavation method for subway tunnel tunneling

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915720A (en) * 2018-07-15 2018-11-30 中铁二十局集团有限公司 A kind of large cross-section tunnel passes through fault belt construction method
CN108915720B (en) * 2018-07-15 2019-11-12 中铁二十局集团有限公司 A kind of large cross-section tunnel passes through fault belt construction method
CN111140237A (en) * 2020-01-08 2020-05-12 合肥市轨道交通集团有限公司 Underground excavation method for subway tunnel tunneling

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