CN112392513A - Anti-release combined supporting structure for railway tunnel in plaster-containing stratum and construction method thereof - Google Patents
Anti-release combined supporting structure for railway tunnel in plaster-containing stratum and construction method thereof Download PDFInfo
- Publication number
- CN112392513A CN112392513A CN202011386762.1A CN202011386762A CN112392513A CN 112392513 A CN112392513 A CN 112392513A CN 202011386762 A CN202011386762 A CN 202011386762A CN 112392513 A CN112392513 A CN 112392513A
- Authority
- CN
- China
- Prior art keywords
- supporting structure
- tunnel
- construction
- stratum
- surrounding rock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 46
- 239000011505 plaster Substances 0.000 title claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000011284 combination treatment Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 239000004567 concrete Substances 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000011282 treatment Methods 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 239000004035 construction material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a release-resistant combined supporting structure of a railway tunnel in a plaster-containing stratum, which comprises a peripheral surrounding rock reinforcing layer, a primary supporting structure and a secondary lining structure which are sequentially arranged from outside to inside, wherein a prestressed anchor rod is inserted into the peripheral surrounding rock reinforcing layer, a buffer layer and a waterproof layer are arranged between the primary supporting structure and the secondary lining structure, the waterproof layer is positioned on the inner side of the buffer layer, the sections of the primary supporting structure and the secondary lining structure are oval rings, and the ratio of the radius of the short side to the radius of the long side of each oval ring is 0.75-1. The construction method comprises the following steps: the method comprises the following steps of tunnel surrounding rock depth combination treatment, primary support construction, deformation space reservation construction and secondary lining construction. The tunnel supporting structure integrally strengthens, optimizes the curvature of the side wall and is provided with the buffer layer, so that the external pressure of a paste-containing stratum is better absorbed and released, the pressure bearing of a secondary lining structure is reduced, the tunnel structure is further stabilized, the construction cost is reduced, and the tunnel supporting structure has better economy.
Description
Technical Field
The invention belongs to the technical field of tunnel and underground engineering design and construction, and particularly relates to a release-resistant combined supporting structure of a railway tunnel in a paste-containing stratum and a construction method thereof.
Background
In recent years, due to the rapid development of railway and highway tunnel business, the number of tunnels with paste-containing stratums in tunnel construction is increased, the problems of surrounding rock deformation, primary support deformation, lining cracking and the like in tunnel construction caused by the paste-containing stratums are more obvious, a new soft rock stratum tunnel support energy design theory is established, the large deformation mechanism and the control way of a weak surrounding rock tunnel are clarified, and a new theory and method support is provided for tunnel large deformation treatment. The anti-release combined supporting section of the railway tunnel in the plaster-containing stratum is optimized, and different design optimization technical schemes such as lining reinforcement, radial full-ring grouting and the like are tried. However, the methods can not well solve the problems of the tunnel with the paste stratum and have higher construction cost.
Disclosure of Invention
The invention provides a release-resistant combined supporting structure of a railway tunnel in a plaster-containing stratum and a construction method thereof, aiming at the technical problems in the prior art, the whole body of the tunnel supporting structure is reinforced, the curvature of a side wall is optimized, and a buffer layer is arranged, so that the external pressure of the plaster-containing stratum is better absorbed and released, the bearing pressure of a two-lining structure is reduced, the tunnel structure is further stabilized, the construction cost is reduced, and the economic efficiency is better.
The technical scheme adopted by the invention is as follows: a construction method of a release-resistant combined supporting structure of a railway tunnel in a plaster-containing stratum is used for constructing a supporting structure with an oval annular cross section, and comprises the following steps: the method comprises the following steps of tunnel surrounding rock depth combination treatment, primary support construction, deformation space reservation construction and secondary lining construction.
Specifically, the tunnel surrounding rock depth combination treatment comprises tunnel surrounding rock reinforcement and surrounding rock deep treatment; the method comprises the following steps of (1) reinforcing surrounding rocks around a tunnel by adopting an advanced conduit grouting system before construction to perform advanced grouting reinforcement on the surrounding rocks around the tunnel, and sealing an underground water seepage channel; and the deep treatment of the surrounding rock is to apply a prestressed anchor rod to the side wall of the tunnel to restrain the deformation of the surrounding rock.
Specifically, primary support construction: the annular I-shaped steel is connected through longitudinal steel bars to form a primary support steel frame, the primary support steel frame is closed in a full-ring mode, and then concrete is sprayed; the concrete adopts C40 impervious concrete, and the admixture selects polycarboxylate high-efficiency water reducing agent and alkali-free liquid accelerator; and sulfate-resistant cement-based slurry is adopted for back backfill grouting.
Specifically, the construction of a reserved deformation space: a deformation space is reserved between the primary supporting structure and the secondary lining structure, and specifically, geotextile is hung on the primary supporting structure, a polyethylene buffer layer is constructed, and a self-adhesive waterproof plate is hung.
Specifically, secondary lining construction: constructing a secondary lining, wherein the secondary lining adopts a molded full-ring reinforced concrete structure, the section of the secondary lining is in an elliptical ring shape, and the ratio of the radius of the short side to the radius of the long side of the structure is 0.75-1; the structure thickness and the reinforcing bars are determined by calculation according to stress: the load borne by the lining is the conventional water and soil load plus the horizontal expansive force load, and the horizontal expansive force load is determined according to a rock sample expansive force test and is not less than 200 KPa.
Specifically, the structural thickness and the stress calculation formula of the reinforcing bars are as follows:
in the formula: s () -a function of the effect related to the load acting on the structure; r () -a structural resistance function related to the strength of the structural material; fr-a representative value of the normal load acting on the structure; fr1-the typical value of the expansion load acting on the structure, directional horizontal, is not less than 200 KPa; f. ofk-a normalized value of the construction material; alpha is alphak-a representative value of a geometric parameter of the structure; c-ultimate constraint value of structure; gamma ray0-the coefficient of the operating conditions of the component, taken as 1.1; gamma ray1-expanded formation attachment safety factor, 1.2; gamma rayf-load component coefficients acting on the structure, which are valued according to building load design specifications; gamma rayf1-expansion load fractional coefficient, taking 1.35; gamma raym-fractional coefficient of structural material, which is taken according to concrete structure design specifications.
The anti-release combined supporting structure of the railway tunnel with the plaster stratum constructed by the construction method comprises a peripheral surrounding rock reinforcing layer, an initial supporting structure and a two-lining structure which are sequentially arranged from outside to inside, wherein a prestressed anchor rod is inserted into the peripheral surrounding rock reinforcing layer, a buffer layer and a waterproof layer are arranged between the initial supporting structure and the two-lining structure, the waterproof layer is positioned on the inner side of the buffer layer, the sections of the initial supporting structure and the two-lining structure are oval rings, and the ratio of the short side radius to the long side radius of each oval ring is 0.75-1.
Preferably, the waterproof layer is a self-adhesive waterproof plate. The buffer layer is a polyethylene buffer layer.
Preferably, the two-lining structure is a molded full-ring reinforced concrete structure. The two-lining structure adopts C40 and P10 reinforced concrete. The primary supporting structure is formed by connecting annular I-shaped steel through longitudinal steel bars and then spraying concrete.
Preferably, the prestressed anchor rods are inserted into both sides of the surrounding rock reinforcing layer.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the deep and shallow parts are combined with surrounding rock treatment, profile steel primary support and curvature section optimization, so that a safe and high-bearing-capacity section structure is provided for constructing a plaster-containing stratum, the deformation of the surrounding rock can be effectively controlled, external loads are borne, and the operation risk of a tunnel is greatly reduced.
2. According to the invention, a deformation space is reserved between the primary support and the secondary lining structure, and a buffer layer and a waterproof layer are applied, so that partial pressure can be released, and the influence of external load can be reduced; and the self-deformation bearing capacity of the surrounding rock is fully utilized, and the paving and hanging type buffer structure and the self-adhesion waterproof plate are arranged, so that the construction is convenient, the safety of the structure is improved while supporting materials are reduced, the construction cost is reduced, and the economic efficiency is better.
3. The secondary lining structure of the invention has definite stress system design, calculates the structural section and the reinforcing bars through reasonable horizontal expansion force, has better design feasibility, solves the problem that the current tunnel containing the plaster rock stratum is properly strengthened by feeling and experience, and can ensure the normal service of the tunnel during operation.
4. The invention is designed aiming at the unfavorable working condition of the expansion load, the curvature of the side wall is optimized, the two sides of the supporting structure are expanded outwards to form an oval annular section, and the stress capacity of the structure is improved; the oval annular supporting section structure can greatly reduce the area of an excavated section relative to an annular section, saves engineering investment and overcomes the problem of low construction efficiency of a circular section by adopting a drilling and blasting method.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a secondary lining calculation according to an embodiment of the present invention.
In the figure, 1-a surrounding rock reinforcing layer, 2-a primary supporting structure, 3-a buffer layer, 4-a waterproof layer, 5-a secondary lining structure and 6-a prestressed anchor rod.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a release-resistant combined supporting structure of a railway tunnel containing a paste stratum, which comprises a peripheral surrounding rock reinforcing layer 1, a primary supporting structure 2 and a secondary lining structure 5 which are sequentially arranged from outside to inside, wherein a prestressed anchor rod 6 is inserted into the peripheral surrounding rock reinforcing layer 1, a buffer layer 3 and a waterproof layer 4 are arranged between the primary supporting structure 2 and the secondary lining structure 5, the waterproof layer 4 is positioned on the inner side of the buffer layer 3, the sections of the primary supporting structure 2 and the secondary lining structure 5 are oval rings, and the ratio of the inner outline of each oval ring to the radius of the short side to the radius of the long side of the outer outline is 0.75-1. The elliptical annular cross-sectional structure strengthens the capacity of the primary supporting structure 2 and the secondary lining structure 5 for resisting external loads, and improves the stress capacity of the structure. The buffer layer 3 is a polyethylene buffer layer. The waterproof layer 4 is a self-adhesive waterproof board. The two-lining structure 5 is of a molded full-ring reinforced concrete structure. The two-lining structure 5 adopts C40 and P10 reinforced concrete. The primary supporting structure 2 is formed by connecting annular I-shaped steel through longitudinal steel bars and then spraying concrete. The prestressed anchor rods 6 are inserted into two sides of the surrounding rock reinforcing layer 1.
The construction method of the anti-release combined supporting structure of the railway tunnel in the plaster-containing stratum comprises the following steps:
a) the tunnel surrounding rock depth combination treatment comprises tunnel surrounding rock reinforcement and surrounding rock depth treatment; the method comprises the following steps of (1) tunnel peripheral surrounding rock reinforcement, namely adopting an advanced conduit grouting system to perform advanced grouting reinforcement on the surrounding rock around the tunnel before construction, sealing an underground water seepage channel, and reinforcing the depth to be 3-5 m; the deep treatment of the surrounding rock applies the pre-stressed anchor rods 6 with the length of more than 20m to the side wall of the tunnel, restrains the deformation of the surrounding rock and provides the supporting capability as early as possible. The prestressed anchor rod 6 adopts a full-length bonding anchor rod, a phi 25 combined hollow grouting anchor rod is adopted, all anchor rods are additionally provided with backing plates, and full grouting is ensured.
b) Primary support construction: the circumferential I-shaped steel is connected through longitudinal steel bars to form a primary support steel frame, the primary support steel frame is closed in a full ring mode, then C25 concrete with the thickness of 25cm is sprayed, the protection thickness of the primary support steel frame close to the surrounding rock side is not less than 4cm, and the protection thickness of the primary support steel frame close to the second lining side is not less than 3 cm; the distance between the circumferential I-shaped steels is densely arranged or is 500mm, the concrete adopts C40 impervious concrete, and the additive adopts a polycarboxylate high-efficiency water reducing agent and an alkali-free liquid accelerating agent; and sulfate-resistant cement-based grout is adopted for back backfilling and grouting, so that the primary support is ensured to have enough strength and rigidity to inhibit excessive deformation of surrounding rocks.
c) And (3) construction of a reserved deformation space: a deformation space is reserved between the primary supporting structure 2 and the secondary lining structure 5, partial pressure can be released, and the influence of external load is reduced. Specifically, geotextile is hung on a primary supporting structure 2, a polyethylene buffer layer 3 with the thickness of 50mm is constructed, and a self-adhesive waterproof plate with the thickness of 1.5mm is hung to ensure the close adhesion with a secondary lining.
d) Secondary lining construction: and constructing a secondary lining. The secondary lining is an inner layer structure of the composite lining, and forms a complete supporting system together with the primary shotcrete support and surrounding rocks on the outer layer. The secondary lining adopts a molded full-ring reinforced concrete structure (the thickness is 55 cm and 70 cm), is designed according to the bearing of all external loads, improves the grade and the impermeability grade and the thickness of the secondary lining, and adopts C40 and P10 reinforced concrete. The secondary molded lining is applied after the deformation of the surrounding rock and the primary support is basically stable.
The curvature of the side wall of the secondary lining is optimized, two sides of the side wall of the inner contour are properly expanded relative to the building boundary (the boundary contour line before expansion is drawn by a dotted line in figure 1) to form an oval section, the horizontal expansion load resistance of the structure is improved, the specific expansion size is determined according to expansion load calculation, and the ratio of the short side radius to the long side radius of the structure is 0.75-1. As shown in fig. 2, the structural thickness and reinforcing bars of the optimized side wall curvature lining are determined by force calculation: the load borne by the lining is the conventional water and soil load plus the horizontal expansive force load, and the horizontal expansive force load is determined according to a rock sample expansive force test and is not less than 200 KPa.
The structural thickness and the stress calculation formula of the reinforcing bars are as follows:
in the formula: s () -a function of the effect related to the load acting on the structure; r () -a structural resistance function related to the strength of the structural material; fr-a representative value of the normal load acting on the structure; fr1-the typical value of the expansion load acting on the structure, directional horizontal, is not less than 200 KPa; f. ofkStandard values of construction materials；αk-a representative value of a geometric parameter of the structure; c-ultimate constraint value of structure; gamma ray0-the coefficient of the operating conditions of the component, taken as 1.1; gamma ray1-expanded formation attachment safety factor, 1.2; gamma rayf-load component coefficients acting on the structure, which are valued according to building load design specifications; gamma rayf1-expansion load fractional coefficient, taking 1.35; gamma raym-fractional coefficient of structural material, which is taken according to concrete structure design specifications.
The present invention has been described in detail with reference to the embodiments, but the description is only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The scope of the invention is defined by the claims. The technical solutions of the present invention or those skilled in the art, based on the teaching of the technical solutions of the present invention, should be considered to be within the scope of the present invention, and all equivalent changes and modifications made within the scope of the present invention or equivalent technical solutions designed to achieve the above technical effects are also within the scope of the present invention.
Claims (10)
1. A construction method of a release-resistant combined supporting structure of a railway tunnel in a plaster-containing stratum is characterized by comprising the following steps: the construction of the supporting structure with the oval annular cross section comprises the following steps: the method comprises the following steps of tunnel surrounding rock depth combination treatment, primary support construction, deformation space reservation construction and secondary lining construction.
2. The construction method of the anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 1, wherein: the tunnel surrounding rock depth combination treatment comprises tunnel surrounding rock reinforcement and surrounding rock deep treatment; the method comprises the following steps of (1) reinforcing surrounding rocks around a tunnel by adopting an advanced conduit grouting system before construction to perform advanced grouting reinforcement on the surrounding rocks around the tunnel, and sealing an underground water seepage channel; and the deep treatment of the surrounding rock is to apply a prestressed anchor rod to the side wall of the tunnel to restrain the deformation of the surrounding rock.
3. The construction method of the anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 1, wherein: primary support construction: the annular I-shaped steel is connected through longitudinal steel bars to form a primary support steel frame, the primary support steel frame is closed in a full-ring mode, and then concrete is sprayed; the concrete adopts C40 impervious concrete, and the admixture selects polycarboxylate high-efficiency water reducing agent and alkali-free liquid accelerator; and sulfate-resistant cement-based slurry is adopted for back backfill grouting.
4. The construction method of the anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 1, wherein: and (3) construction of a reserved deformation space: a deformation space is reserved between the primary supporting structure and the secondary lining structure, and specifically, geotextile is hung on the primary supporting structure, a polyethylene buffer layer is constructed, and a self-adhesive waterproof plate is hung.
5. The construction method of the anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 1, wherein: secondary lining construction: constructing a secondary lining, wherein the secondary lining adopts a molded full-ring reinforced concrete structure, the section of the secondary lining is in an elliptical ring shape, and the ratio of the radius of the short side to the radius of the long side of the structure is 0.75-1; the structure thickness and the reinforcing bars are determined by calculation according to stress: the load borne by the lining is the conventional water and soil load plus the horizontal expansive force load, and the horizontal expansive force load is determined according to a rock sample expansive force test and is not less than 200 KPa.
6. The construction method of the anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 5, wherein: the structural thickness and the stress calculation formula of the reinforcing bars are as follows:
in the formula: s () -a function of the effect related to the load acting on the structure; r () -a structural resistance function related to the strength of the structural material; fr-a representative value of the normal load acting on the structure; fr1-the typical value of the expansion load acting on the structure, directional horizontal, is not less than 200 KPa; f. ofk-structureA standard value of the material; alpha is alphak-a representative value of a geometric parameter of the structure; c-ultimate constraint value of structure; gamma ray0-the coefficient of the operating conditions of the component, taken as 1.1; gamma ray1-expanded formation attachment safety factor, 1.2; gamma rayf-load component coefficients acting on the structure, which are valued according to building load design specifications; gamma rayf1-expansion load fractional coefficient, taking 1.35; gamma raym-fractional coefficient of structural material, which is taken according to concrete structure design specifications.
7. An anti-release combined supporting structure of a railway tunnel in a paste-containing stratum, which is constructed by adopting the construction method of any one of claims 1 to 6, is characterized in that: the prestressed anchor rod is inserted into the peripheral surrounding rock reinforcing layer, a buffer layer and a waterproof layer are arranged between the primary supporting structure and the two lining structures, the waterproof layer is located on the inner side of the buffer layer, the sections of the primary supporting structure and the two lining structures are oval rings, and the ratio of the short edge radius to the long edge radius of each oval ring is 0.75-1.
8. The anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 7, wherein: the waterproof layer adopts the self-adhesion waterproof board, the buffer layer is the polyethylene buffer layer.
9. The anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 7, wherein: the two-lining structure adopts a molded full-ring reinforced concrete structure, and adopts C40 and P10 reinforced concrete; the primary supporting structure is formed by connecting annular I-shaped steel through longitudinal steel bars and then spraying concrete.
10. The anti-release combined supporting structure of the railway tunnel with the paste stratum as claimed in claim 7, wherein: the prestressed anchor rods are inserted into two sides of the peripheral surrounding rock reinforcing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386762.1A CN112392513A (en) | 2020-12-02 | 2020-12-02 | Anti-release combined supporting structure for railway tunnel in plaster-containing stratum and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386762.1A CN112392513A (en) | 2020-12-02 | 2020-12-02 | Anti-release combined supporting structure for railway tunnel in plaster-containing stratum and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112392513A true CN112392513A (en) | 2021-02-23 |
Family
ID=74604077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011386762.1A Pending CN112392513A (en) | 2020-12-02 | 2020-12-02 | Anti-release combined supporting structure for railway tunnel in plaster-containing stratum and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112392513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006814A (en) * | 2021-04-28 | 2021-06-22 | 西南交通大学 | Pressure reducing structure and construction method for newly-built tunnel to span existing traffic tunnel |
-
2020
- 2020-12-02 CN CN202011386762.1A patent/CN112392513A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006814A (en) * | 2021-04-28 | 2021-06-22 | 西南交通大学 | Pressure reducing structure and construction method for newly-built tunnel to span existing traffic tunnel |
| CN113006814B (en) * | 2021-04-28 | 2021-10-15 | 西南交通大学 | Pressure reducing structure and construction method for newly-built tunnel to span existing traffic tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209924998U (en) | Shallow earthing shield tunnel is worn road reinforcement protection architecture down | |
| CN104264688A (en) | Manual hole digging non-uniform pile support construction technology | |
| CN109404005A (en) | Bored tunnel duck eye is into big hole pre-add solid system and construction method | |
| CN107503754A (en) | A kind of construction method of VI grade of country rock rich water Shallow tunnel with large cross-section | |
| CN107401413A (en) | Tunnel structure for expansive stratum | |
| CN110617067A (en) | Low-risk construction method for full-section boundary advanced pipe shed of extremely-soft surrounding rock tunnel | |
| CN108166989A (en) | The asymmetric twin-arch tunnel interval wall construction method of water rich strata " OC " shape | |
| CN107725058A (en) | The large deformation control method of chlorite schist stratum list hole Three-Lane Highway Tunnel | |
| CN107130607A (en) | Building basement supporting | |
| CN109914474A (en) | A kind of pipe gallery U-type groove, which is excavated, presses push construction method | |
| CN207033463U (en) | Mine shield handing-over tunnel folded type joint design in the middle part of marine site | |
| CN111810200A (en) | Shield tunnel expanding and excavating system and method based on middle upright posts and inverted arches | |
| CN112392513A (en) | Anti-release combined supporting structure for railway tunnel in plaster-containing stratum and construction method thereof | |
| CN213869901U (en) | Anti combination supporting construction that puts of cream stratum railway tunnel | |
| CN205475257U (en) | A composite pile anchor supporting construction for deepening excavation | |
| CN212642730U (en) | Collapsible loess area tunnel passes people's air defense structure | |
| CN213175669U (en) | Disturbance-resistant double-arch tunnel structure | |
| CN114703921B (en) | Construction method for preventing surging based on temporary back cover structure | |
| CN115142854A (en) | Mine method tunnel single-layer lining structure system and construction method | |
| CN109026031B (en) | Reconstruction construction method for collapsed section of gas tunnel after strong earthquake | |
| CN209959261U (en) | Real-time feedback grouting device for correcting horizontal deformation of subway tunnel | |
| CN114215546A (en) | Preliminary bracing method for soft rock tunnel | |
| CN209443472U (en) | A kind of supporting construction of double-row pile combination wide-angle anchor cable | |
| CN208106432U (en) | The asymmetric twin-arch tunnel median septum constructing device of water rich strata " OC " shape | |
| CN209339958U (en) | A kind of bored tunnel duck eye is into big hole pre-add solid system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |