CN112096420A - Tunnel non-center pilot tunnel supporting structure and construction method thereof - Google Patents

Tunnel non-center pilot tunnel supporting structure and construction method thereof Download PDF

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Publication number
CN112096420A
CN112096420A CN202011044757.2A CN202011044757A CN112096420A CN 112096420 A CN112096420 A CN 112096420A CN 202011044757 A CN202011044757 A CN 202011044757A CN 112096420 A CN112096420 A CN 112096420A
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CN
China
Prior art keywords
tunnel
special
contour line
arch
intermediate wall
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CN202011044757.2A
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Chinese (zh)
Inventor
林秀桂
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Priority to CN202011044757.2A priority Critical patent/CN112096420A/en
Publication of CN112096420A publication Critical patent/CN112096420A/en
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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
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • 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
    • 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
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/102—Removable shuttering; Bearing or supporting devices therefor
    • 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
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
    • 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
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Abstract

The invention relates to a tunnel supporting structure without a middle pilot tunnel, wherein a primary support of the tunnel supporting structure consists of a primary support of a front tunnel, a primary support of a rear tunnel and a middle cast-in-place special-shaped intermediate wall, in order to ensure the stability of a primary support system during construction, the special-shaped intermediate wall structure is constructed in a cast-in-place mode, primary support section steel of a rear chamber is supported on the special-shaped intermediate wall and is fixed through a pre-embedded support system, and a left chamber and a right chamber form a secondary lining structure sequentially according to a conventional mountain tunnel excavation process. The supporting method is characterized in that the method for the special-shaped intermediate wall is improved while no middle pilot tunnel is excavated, and the transverse rigidity and stability of the special-shaped intermediate wall are improved. The supporting method is more reliable and reasonable in stress mechanism, and is particularly suitable for the construction of the multi-arch tunnel with a large section and a bad geological environment.

Description

Tunnel non-center pilot tunnel supporting structure and construction method thereof
Technical Field
The invention relates to an excavation and supporting method in mountain tunnel design, in particular to a tunnel non-center pilot tunnel supporting structure and a construction method thereof.
Background
In the field of tunnel engineering design, the multi-arch tunnel is widely adopted due to the advantages of low wiring difficulty, less occupied land, small environmental influence, capability of meeting the separation of uplink and downlink and the like. The multi-arch tunnel is generally large in section and span and complex in structure. At present, the commonly used multi-arch tunnels are divided according to the existence of middle pilot tunnels, and two types mainly exist.
The construction method of the middle pilot tunnel has the problems of more construction procedures, high construction difficulty and low construction efficiency. And multiple excavation blasting relatively more disturbs surrounding rocks, and the problem of water prevention and drainage at the middle wall of the middle pilot tunnel is outstanding. Few construction methods without middle pilot tunnels have the problems that the rigidity and stability of the middle wall are insufficient when the section of the tunnel is large and the geological condition is complex, and the middle wall is likely to be biased to crack or deform due to the fact that the front tunnel and the rear tunnel are excavated in sequence. An excavation and supporting method for solving the problems of large section and complex geological conditions is to be proposed urgently.
Through patent and literature retrieval, the construction method of the project which is usually adopted at present and has no middle pilot hole or hidden middle wall is disclosed as follows: CN106761836A, CN204152527U and CN 108266191A. The comparison document includes a technology of a middle pilot hole or an implicit middle wall, wherein the wall adopts a steel frame form, the rigidity is weak, and the construction conditions are severe.
Disclosure of Invention
The invention aims to provide a tunnel supporting structure without a middle pilot tunnel, which can simplify the construction process, reduce the construction difficulty and improve the construction efficiency on the premise of ensuring the stress and the safety. Compared with the initial support form of the construction with the middle pilot tunnel, the construction method simplifies the construction steps and overcomes the problems of construction quality of water prevention and drainage of the middle wall of the multi-arch tunnel, absolute settlement and relative uneven settlement of the middle wall, the arch part and the side wall and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows: a tunnel supporting structure without a middle pilot tunnel comprises a front tunnel and a rear tunnel, wherein the front tunnel is provided with a primary section steel arch, and the tunnel supporting structure is characterized in that a cast-in-situ special-shaped intermediate wall is arranged on one side of the inner side of the primary section steel arch of the front tunnel, which is close to the rear tunnel, an embedded support system is embedded in the special-shaped intermediate wall, and the primary section steel arch of the rear tunnel is supported on the special-shaped intermediate wall and is fixed through the embedded support system.
Further, the contour line of the special-shaped intermediate wall is composed of four parts: the first special-shaped area contour line, the second special-shaped area contour line, the third special-shaped area contour line and the fourth special-shaped area contour line are sequentially connected, wherein the first special-shaped area contour line is a tunnel outer contour line; the contour line of the second special-shaped area is a first arc line with the radius of R1, and the first arc line is tangent to the reserved deformed outer contour line of the tunnel, wherein the reserved deformed outer contour line of the tunnel is outwards extended by 50-100 mm relative to the outer contour line of the tunnel; the contour line of the third deformed region is a horizontal straight line with the length of s; the fourth special-shaped area contour line is a second arc line with the radius of R2, and the second arc line is tangent to the tunnel reserved deformation outer contour line and is intersected with the third special-shaped area contour line.
Further, according to the position of the backward hole primary support type steel arch, the embedded support system is arranged on a second special-shaped area contour line and comprises a section steel reserved joint, the section steel reserved joint is formed by welding an anchor backing plate and a steel template, an anchor bolt is reserved in the anchor backing plate, the bottom of the anchor backing plate is welded with the forward hole primary support type steel arch, the embedded support system is anchored in the special-shaped middle partition wall through bolts, the end part of the backward hole type steel arch is welded with the upper part of the anchor backing plate, and the anchoring length of the anchor bolt is not less than 1 m. The pre-buried support system is anchored in the special-shaped mid-board through bolts, and provides a reliable support for the erection of the backward hole type steel arch.
The cast-in-place special-shaped mid-board reinforcement area must satisfy: t is more than or equal to 0.25mh≤1.2m，tv≤0.25m；
th-the lateral horizontal distance of the second profiled area contour from the tunnel edge;
tvthe vertical distance from the contour line of the fourth special-shaped area to the bottom of the contour line 1 of the special-shaped area.
The invention also aims to provide a construction method of the tunnel non-center pilot tunnel supporting structure, which can simplify the construction process, reduce the construction difficulty and improve the construction efficiency on the premise of ensuring the stress and the safety.
The technical scheme of the invention is as follows: a construction method of a tunnel non-center pilot tunnel supporting structure is characterized by comprising the following steps: A. excavating a pilot tunnel and implementing primary support; B. constructing a special-shaped middle partition wall structure in a mould mode, and embedding a right-hole support system; C. excavating a rear tunnel and implementing primary support; D. and (5) performing secondary lining mold building construction of the tunnel to finish the main structure of the tunnel.
Further, the construction method of the tunnel non-center pilot tunnel supporting structure comprises the following specific steps:
excavating an upper step of a preceding tunnel, and primarily supporting a steel arch frame at an arch part of the preceding tunnel;
excavating a step in the advanced tunnel, welding a profile steel reserved joint on the step primary support profile steel arch frame in the advanced tunnel close to one side of the backward tunnel, and reserving an anchor bolt on the profile steel reserved joint;
firstly, excavating a lower step of the tunnel, and firstly supporting a steel arch frame;
pouring and implementing the intermediate wall in a grading manner, and pouring a reserved anchor bolt on the reserved joint of the profile steel in the intermediate wall;
constructing a prior hole side wall and an inverted arch reinforced concrete structure;
adopting a template trolley to construct a secondary lining of the arch wall of the pilot tunnel;
excavating an upper step of a backward tunnel, and primarily supporting a steel arch frame at an arch part of the backward tunnel;
excavating a step in the backward tunnel, primarily supporting the profile steel arch in the backward tunnel, and welding one end of the primarily supporting profile steel arch in the backward tunnel on the profile steel reserved joint;
excavating a backward tunnel lower step, and primarily supporting the steel arch frame;
plain concrete filling is carried out on the upper part of the primary support steel arch frame of the step below the backward tunnel, close to the forward tunnel, so as to be matched with the inverted arch reinforced concrete structure of the backward tunnel;
constructing a post-construction hole side wall and an inverted arch reinforced concrete structure;
and (5) adopting a formwork trolley to construct a backward tunnel arch wall for secondary lining.
Compared with a supporting method without a middle pilot tunnel in a comparison file, the method disclosed by the invention has the advantages that the integrity of the middle wall is enhanced, and the requirements on stress and deformation of the excavation supporting of the front and rear tunnels are met. In order to ensure the stability of a primary support system during construction, the special-shaped intermediate wall structure is constructed by cast-in-place reinforced concrete, the transverse rigidity is high, primary support section steel of a rear chamber is supported on the special-shaped intermediate wall and is fixed by a pre-embedded support system, and a left chamber and a right chamber form a secondary lining structure sequentially according to a conventional mountain tunnel excavation process. The supporting method is characterized in that the method for the special-shaped intermediate wall is improved while no middle pilot tunnel is excavated, and the transverse rigidity and stability of the special-shaped intermediate wall are improved. The supporting method is more reliable and reasonable in stress mechanism, and is particularly suitable for the construction of the multi-arch tunnel with a large section and a bad geological environment.
Drawings
FIG. 1 is a sectional view of a working method of the present invention.
FIG. 2 is a cross-sectional view of the primary system of the present invention.
FIG. 3 is a sectional view of the cast-in-place special-shaped intermediate wall structure of the present invention.
FIG. 4 is a structural requirement diagram of the cast-in-place special-shaped intermediate wall of the invention.
Fig. 5 is a schematic view of the pre-buried support system of the present invention.
Detailed Description
The invention is further described below with reference to specific embodiments of the invention and the accompanying drawings.
A tunnel supporting structure without a middle pilot tunnel comprises a front tunnel and a rear tunnel, wherein the front tunnel is provided with a primary support, and the tunnel supporting structure is characterized in that a cast-in-place special-shaped intermediate wall is arranged on one side of the inner side of the primary support of the front tunnel close to the rear tunnel, an embedded support system is embedded in the special-shaped intermediate wall, and the primary support section steel of the rear tunnel is supported on the special-shaped intermediate wall and is fixed through the embedded support system.
In one embodiment, the invention is applied to the excavation supporting design of a geological complex multi-arch tunnel, and the engineering is characterized in that:
1) tunnel engineering is in general or in poor geological areas.
2) The tunnel engineering has a larger structural section.
3) The tunnel engineering has certain requirements on the construction period.
Aiming at the engineering, the invention recommends the adoption of the tunnel pilot hole-free primary support method provided by the invention, which comprises the following specific steps:
the step excavation 1 is carried out on the upper step of the prior tunnel, and the steel arch frame 2 is primarily supported at the arch part of the prior tunnel.
Excavating a step in the advanced tunnel 3, welding a profile steel reserved joint on a primary support profile steel arch frame of the step in the advanced tunnel 4, and reserving an anchor bolt on the profile steel reserved joint.
Excavating 5 the lower step of the pilot tunnel, and primarily supporting the steel arch 6 of the lower step of the pilot tunnel.
And (5) pouring the special-shaped intermediate wall in the implementation range 7 in a grading manner.
Constructing a prior hole side wall and an inverted arch reinforced concrete structure 8.
And adopting a template trolley to construct a secondary lining 9 of the arch wall of the prior tunnel.
And excavating an upper step 10 of the backward tunnel, and primarily supporting a steel arch 11 at the arch part of the backward tunnel.
And (3) excavating a step in the backward tunnel 12, and primarily supporting a steel arch 13 in the step in the backward tunnel.
And (5) excavating a backward cave lower step 14, and primarily supporting a steel arch 15 for the backward cave lower step.
Plain concrete filling of the area 16 is performed.
And constructing a post-construction hole side wall and an inverted arch reinforced concrete structure 17.
And (4) adopting a formwork trolley to construct a backward cave arch wall secondary lining 18.
As shown in fig. 2, a special-shaped intermediate wall 102 is arranged on one side of the antecedent-cave primary support steel arch 101 close to the backward cave, an embedded connecting steel plate 103 is arranged on the lower portion of one side of the antecedent-cave primary support steel arch 101 close to the backward cave, an embedded support system 104 is arranged in the middle of one side of the antecedent-cave primary support steel arch 101 close to the backward cave, one end of the backward-cave primary support steel arch 105 is welded on the embedded support system 104, and the other end is welded on the embedded connecting steel plate 103, so that a reliable support is provided for the erection of the backward-cave steel arch. The front tunnel primary support steel arch and the rear tunnel primary support steel arch are both provided with a downward oblique locking steel pipe 106 towards the outer soil body, the length of the locking steel pipe is 4.5m, the pipe diameter is 50mm, and the wall thickness of the locking steel pipe is 5 mm.
As shown in fig. 3, an embedded support system 104 is welded on one side of the preliminary tunnel steel arch 101 close to the backward tunnel, then main steel bars of the special-shaped intermediate wall 102 are bound, concrete is poured to form a cast-in-place intermediate wall 108, and a net shotcrete 107 is hung above the cast-in-place intermediate wall 108.
In order to ensure the integral rigidity, the construction operability and the construction quality of the cast-in-place middle wall, the contour line of the special-shaped area, the embedded support system and the reinforcement distribution area need to meet certain construction requirements.Wherein, the special-shaped regional outline mainly comprises four parts: the first special-shaped area contour line A is a tunnel outer contour line; the second special-shaped area contour line B is an arc line with the radius of R1 and is tangent to the reserved deformed outer contour line of the tunnel; the contour line C of the third deformed region is a horizontal straight line with the length of s; and the fourth special-shaped area contour line E is an arc line with the radius of R2, is tangent to the tunnel reserved deformation outer contour line and is intersected with the third special-shaped area contour line C. The pre-buried support system is arranged on a second special-shaped area contour line B according to the position of a steel arch of a backward tunnel, the section steel reserved joint is formed by welding a 16mm thick steel template and an anchor backing plate, and the anchoring length of an anchor bolt is not less than 1 m. The cast-in-place special-shaped mid-board reinforcement area must satisfy: t is more than or equal to 0.25mh≤1.2m，tvLess than or equal to 0.25 m. The reserved deformation outer contour line of the tunnel is 50-100 mm larger than the outer contour line of the tunnel, the reserved deformation amount of the tunnel is 80mm, and the detailed structure is shown in fig. 4.
The partial size expressions and meanings are as follows:
R1＝S+s
R2＝Rinverted arch+a
s＝D-H
R1-radius of the contour line 2 of the special-shaped area;
r2-radius of the special-shaped area outline 4;
s is the distance from the side line of the tunnel to the center line of the tunnel;
s-the third difference region contour line C is the length;
Rinverted arch-tunnel bottom inverted arch contour radius;
a-tunnel reserved deformation;
d is the clear distance of the tunnel;
h-steel arch height;
ththe lateral horizontal distance from the second special-shaped area contour line B to the side line of the tunnel;
tvthe vertical distance from the fourth special-shaped area contour line E to the bottom of the first special-shaped area contour line A is short.
In the pre-buried support system in the preliminary support steel arch frame 4 of the step in the pilot tunnel, the pre-buried support system is formed by combining an anchor backing plate 109 with an anchor bolt and a steel template 110, the anchor backing plate 109 is of a rectangular structure, the steel template 110 is welded on three sides of the anchor backing plate 109 respectively, one side in the middle is welded with the rectangular steel template, the other two corresponding sides are welded with the triangular steel template respectively, and a cavity is formed between the anchor backing plate 109 and the steel template 110. The embedded anchor bolts 111 are preferably provided with 4 25mmHRB400 steel bars, preferably the anchoring length is 1000mm, and are connected with the special-shaped intermediate wall; the anchor backing plate and the steel formwork are preferably 16mm thick steel plates, the anchor backing plate and three welded steel formwork forming steel reserved joints form a reliable support for the backward-moving hole type steel arch center. During construction, an anchor backing plate of the profile steel reserved joint is welded on a preliminary tunnel profile steel arch frame, an anchor bolt is reserved on the anchor backing plate and extends into the range of a cast-in-place middle wall 108, the cast-in-place middle wall is poured, the profile steel reserved joint is anchored on a special-shaped middle wall, when the hole profile steel arch frame is constructed, the end part of the hole profile steel arch frame is inserted into a cavity formed between the anchor backing plate 109 and a steel template 110 and is welded with the anchor backing plate, and therefore a reliable support is formed for the hole profile steel arch frame.
The special-shaped intermediate wall within the range 7 of the invention is poured by times, so that the sufficient transverse rigidity and stability are ensured. The special-shaped area is formed by four contour lines in a surrounding mode, the factors such as clear distance of a tunnel and the like are comprehensively considered, and the cast-in-place special-shaped intermediate wall s in the area is preferably 2.76m and thPreferably 1.2m, tvPreferably 0.25m, and the suspended net sprayed concrete 107 is adopted in the cast-in-place difficult area to enhance the initial bearing capacity.
The invention can overcome the problems of low tunnel construction efficiency, low waterproof construction quality, insufficient middle wall integral stability and the like on the premise of ensuring stress and safety, and is a mountain tunnel supporting method with wide application range and good economic benefit.

Claims (6)

1. A tunnel supporting structure without a middle pilot tunnel comprises a front tunnel and a rear tunnel, wherein the front tunnel is provided with a primary section steel arch, and the tunnel supporting structure is characterized in that a cast-in-situ special-shaped intermediate wall is arranged on one side of the inner side of the primary section steel arch of the front tunnel, which is close to the rear tunnel, an embedded support system is embedded in the special-shaped intermediate wall, and the primary section steel arch of the rear tunnel is supported on the special-shaped intermediate wall and is fixed through the embedded support system.
2. The support structure for a tunnel without a center pilot tunnel according to claim 1, wherein the contour line of the deformed intermediate wall is composed of four parts: the first special-shaped area contour line, the second special-shaped area contour line, the third special-shaped area contour line and the fourth special-shaped area contour line are sequentially connected, wherein the first special-shaped area contour line is a tunnel outer contour line; the contour line of the second special-shaped area is a first arc line with the radius of R1, and the first arc line is tangent to the reserved deformed outer contour line of the tunnel, wherein the reserved deformed outer contour line of the tunnel is outwards extended by 50-100 mm relative to the outer contour line of the tunnel; the contour line of the third deformed region is a horizontal straight line with the length of s; the fourth special-shaped area contour line is a second arc line with the radius of R2, and the second arc line is tangent to the tunnel reserved deformation outer contour line and is intersected with the third special-shaped area contour line.
3. The tunnel support structure without a pilot tunnel according to claim 1, wherein the pre-embedded support system is disposed on a contour line of the second irregular area according to a position of a preliminary supporting steel arch of the following tunnel, the pre-embedded support system comprises a reserved steel joint, the reserved steel joint is formed by welding an anchor backing plate and a steel formwork, an anchor bolt is reserved in the anchor backing plate, the bottom of the anchor backing plate is welded to the preliminary supporting steel arch of the preceding tunnel, the pre-embedded support system is anchored in the irregular intermediate wall through bolts, and an end portion of the steel arch of the following tunnel is welded to an upper portion of the anchor backing plate.
4. The tunnel pilot tunnel-free supporting structure of claim 3, wherein the cast-in-place special-shaped intermediate wall reinforcement area has to satisfy: t is more than or equal to 0.25mh≤1.2m，tv≤0.25m；
th-the lateral horizontal distance of the second profiled area contour from the tunnel edge;
tvthe vertical distance from the contour line of the fourth special-shaped area to the bottom of the contour line 1 of the special-shaped area.
5. The construction method of a support structure for a tunnel without a center pilot tunnel according to claim 1, wherein the support method comprises the steps of: A. excavating a pilot tunnel and implementing primary support; B. constructing a special-shaped middle partition wall structure in a mould mode, and embedding a rear tunnel support system; C. excavating a rear tunnel and implementing primary support; D. and (5) performing secondary lining mold building construction of the tunnel to finish the main structure of the tunnel.
6. The construction method according to claim 5, characterized by comprising the following steps:
excavating an upper step of a preceding tunnel, and primarily supporting a steel arch frame at an arch part of the preceding tunnel;
excavating a step in the advanced tunnel, welding a profile steel reserved joint on the step primary support profile steel arch frame in the advanced tunnel close to one side of the backward tunnel, and reserving an anchor bolt on the profile steel reserved joint;
firstly, excavating a lower step of the tunnel, and firstly supporting a steel arch frame;
pouring and implementing the intermediate wall in a grading manner, and pouring a reserved anchor bolt on the reserved joint of the profile steel in the intermediate wall;
constructing a prior hole side wall and an inverted arch reinforced concrete structure;
adopting a template trolley to construct a secondary lining of the arch wall of the pilot tunnel;
excavating an upper step of a backward tunnel, and primarily supporting a steel arch frame at an arch part of the backward tunnel;
excavating a step in the backward tunnel, primarily supporting the profile steel arch in the backward tunnel, and welding one end of the primarily supporting profile steel arch in the backward tunnel on the profile steel reserved joint;
excavating a backward tunnel lower step, and primarily supporting the steel arch frame;
plain concrete filling is carried out on the upper part of the primary support steel arch frame of the step below the backward tunnel, close to the forward tunnel, so as to be matched with the inverted arch reinforced concrete structure of the backward tunnel;
constructing a post-construction hole side wall and an inverted arch reinforced concrete structure;
and (5) adopting a formwork trolley to construct a backward tunnel arch wall for secondary lining.
CN202011044757.2A 2020-09-28 2020-09-28 Tunnel non-center pilot tunnel supporting structure and construction method thereof Pending CN112096420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011044757.2A CN112096420A (en) 2020-09-28 2020-09-28 Tunnel non-center pilot tunnel supporting structure and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011044757.2A CN112096420A (en) 2020-09-28 2020-09-28 Tunnel non-center pilot tunnel supporting structure and construction method thereof

Publications (1)

Publication Number Publication Date
CN112096420A true CN112096420A (en) 2020-12-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011044757.2A Pending CN112096420A (en) 2020-09-28 2020-09-28 Tunnel non-center pilot tunnel supporting structure and construction method thereof

Country Status (1)

Country Link
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Inventor after: Lin Xiugui

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Inventor after: Yuan Senlin

Inventor after: Zhang Zhong

Inventor before: Lin Xiugui

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