CN112814736A - Tunnel collapse treatment method - Google Patents
Tunnel collapse treatment method Download PDFInfo
- Publication number
- CN112814736A CN112814736A CN202011643394.4A CN202011643394A CN112814736A CN 112814736 A CN112814736 A CN 112814736A CN 202011643394 A CN202011643394 A CN 202011643394A CN 112814736 A CN112814736 A CN 112814736A
- Authority
- CN
- China
- Prior art keywords
- section
- collapsed
- collapse
- tunnel
- reinforcing
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000011435 rock Substances 0.000 claims description 14
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004088 foaming agent Substances 0.000 claims description 5
- 239000003085 diluting agent Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 17
- 238000005507 spraying Methods 0.000 abstract description 10
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 description 9
- 239000002893 slag Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- 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
- E21D11/006—Lining anchored in the rock
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/20—Special cross- sections, e.g. corrugated
-
- 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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The application relates to the technical field of tunnel engineering construction, in particular to a tunnel collapse treatment method, which comprises the following steps: carrying out back pressure backfill on the collapsed body, carrying out back pressure on the collapsed section and the traction section firstly, and preliminarily stabilizing the collapsed body; reinforcing the primary support section; and backfilling the collapsing cavity, replacing the arch frame of the collapsing section, spraying concrete, backfilling bubble mixed light soil in the collapsing cavity of the collapsing section, and replacing the arch frame and spraying concrete in the traction section. By adopting the tunnel collapse treatment method to treat the lateral collapse of the primary support, on one hand, the construction safety can be ensured, the engineering cost is reduced, the treatment time can be greatly saved, and good economic and social benefits are obtained.
Description
Technical Field
The application relates to the technical field of tunnel engineering construction, in particular to a tunnel collapse treatment method.
Background
The tunnel penetrates through a fault fracture zone or an influence zone or a small-flexure and dislocation development section of a thin rock mass, stress release is fast caused after excavation, and surrounding rock blocks fall and collapse is caused by surrounding rock instability. The phyllite rock is extremely soft and broken, joints are extremely developed, stability is poor, some loose bodies are arranged at the top of a tunnel, some loose bodies are arranged at the arch waist part, some loose bodies are staggered and distributed, positions are difficult to judge, construction treatment is difficult, and feasible treatment measures need to be made according to geological conditions, surrounding rock stability and the like.
The collapse seriously threatens the safety of tunnel construction by the high development and high risk of the collapse, and the work of preventing and treating the collapse becomes the primary problem of the tunnel construction. The collapse section is treated by adopting the basic standard on the premise of safety and the most economical construction method, the shortest time and effective collapse.
Disclosure of Invention
The application aims to provide a tunnel collapse treatment method, which solves the technical problem that the collapse treatment construction time in the prior art is long and the cost is high to a certain extent.
The application provides a tunnel collapse treatment method, which comprises the following steps:
backfilling a collapsed body, wherein the collapsed body is formed with a collapsed section;
reinforcing a primary support section at least comprising the collapse section;
and filling the collapsed cavity of the collapsed body.
In the above technical solution, further, the preliminary bracing section includes a first predetermined section, a traction section, the collapse section, and a second predetermined section that are sequentially arranged along a direction from a start point to an end point of the tunnel.
In any one of the above technical solutions, further, the method for treating tunnel collapse further includes the steps of: and treating the rock surface of the collapsed cavity before carrying out back pressure backfill on the collapsed body.
In any one of the above technical solutions, further, the method for treating tunnel collapse further includes the steps of: reinforcing the collapsed section after reinforcing the preliminary bracing section.
In any of the above technical solutions, further, the reinforcing of the preliminary bracing section including at least the collapsed section includes the steps of: and recovering the primary support section.
In any of the above technical solutions, further, the restoring the preliminary bracing section includes: preliminarily reinforcing the traction section; and replacing the steel frames of the collapsed sections one by one and reinforcing arch legs.
In any one of the above technical solutions, further, the method for treating tunnel collapse further includes the steps of: after filling the collapsed cavity of the collapsed body, reinforcing the traction section again.
In any of the above technical solutions, further, the filler used for backfilling the collapsed cavity is bubble mixed light soil.
In any of the above technical solutions, further, the bubble-mixed light soil includes:
a first backfill component comprising: water, cement;
a second backfill composition comprising: a foaming agent, water and a diluent, which can form a bubble group;
the first backfill component and the second backfill component are mixed to form the bubble-mixed lightweight soil.
In any one of the above technical solutions, further, the collapsed body is a position where a collapsed is formed, the collapsed cavity is formed by the collapsed body, a collapsed surface is formed at an opening of the collapsed cavity, and the collapsed surface corresponds to the collapsed section.
Compared with the prior art, the beneficial effect of this application is:
the tunnel collapse treatment method specifically comprises the following steps:
carrying out back pressure backfill on the collapsed body, carrying out back pressure on the collapsed section and the traction section firstly, and preliminarily stabilizing the collapsed body;
reinforcing the primary support section;
and backfilling the collapsing cavity, replacing the arch frame of the collapsing section, spraying concrete, backfilling bubble mixed light soil in the collapsing cavity of the collapsing section, and replacing the arch frame and spraying concrete in the traction section.
By adopting the tunnel collapse treatment method to treat the lateral collapse of the primary support, on one hand, the construction safety can be ensured, the engineering cost is reduced, the treatment time can be greatly saved, and good economic and social benefits are obtained.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a tunnel collapse provided in an embodiment of the present application;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
fig. 3 is a flow chart of a bubble mixed light soil processing process of the tunnel collapse treatment method provided in the embodiment of the present application.
Reference numerals:
1-collapse body, 2-first predetermined section, 3-traction section, 4-collapse section, 5-second predetermined section and M-tunnel terminal point.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
A method of tunnel collapse treatment according to some embodiments of the present application is described below with reference to fig. 1-3.
Referring to fig. 1 to 3, an embodiment of the present application provides a method for treating a collapse of a tunnel, which is applied to a primary support section of the tunnel, where the primary support section includes a first predetermined section 2, a traction section 3, a collapse section 4, and a second predetermined section 5, which are sequentially arranged in a direction from a starting point of the tunnel to an end point M of the tunnel, where the collapse section 4 is a position where the collapse is formed, the collapse section 4 forms a collapse cavity, and a hole of the collapse cavity is a collapse surface.
The tunnel collapse processing method provided by the embodiment of the application comprises the following steps:
s1, carrying out back pressure backfill on the collapse body 1; wherein S1 comprises S11 processing the rock surface of the collapsed cavity, namely processing the rock surface of the collapsed cavity before carrying out back pressure backfill on the collapsed body 1;
s2, reinforcing the primary support section; the S2 comprises a recovery primary support section, a reinforcement collapse section 4 and a primary reinforcement traction section 3;
s3, filling collapsed cavities;
s4, the pulling section 3 is reinforced again.
The concrete implementation process of the tunnel collapse treatment method will be described in detail below.
Firstly, pulling back the hole slag generated by the collapsed hole from a slag abandoning field for storing the hole slag, carrying out back pressure backfill on the collapsed square body 1, for example, backfilling the hole slag into the collapsed hole and applying an acting force opposite to the direction of collapse and falling on the hole slag, then compacting a filler backfilled to the collapsed hole by using compaction equipment and reinforcing the traction section 3 and the collapsed square section 4, so as to prevent the filler, namely the hole slag, from falling again due to the action of gravity, and the concrete operation comprises carrying out back pressure backfill on the traction section 3 and the collapsed square section 4 and carrying out concrete spraying treatment, thus preliminarily stabilizing the collapsed square body 1, and having the functions of reducing the free surface and forming a working platform. After back pressure backfill, C25 concrete with the thickness of 10cm is sprayed on the rock surface of a collapsing cavity of the collapsing section 4 to seal the surrounding rock, so that rock mass weathering and collapse range expansion are prevented, and operators are prevented from being injured by falling blocks. In addition, it should be noted that the range of the back pressure backfill and the concrete spraying treatment should not be limited to the collapsed section 4, and the treatment range should be expanded appropriately, so that the condition of falling blocks or secondary collapse around the collapsed section 4 can be effectively avoided, and the specific treatment range may include but is not limited to the traction section 3.
And then, grouting and reinforcing the primary support section, thereby improving the stability and strength of the slag body, and simultaneously forming a waterproof layer near the original lining to play a waterproof role. The specific treatment part is as follows: a first predetermined section 2 relatively close to the beginning end of the tunnel, a traction section 3, a collapse section 4 and a second predetermined section 5 relatively close to the end of the tunnel, arranged in sequence. In detail, after the second predetermined section 5 is excavated, peripheral grouting is performed on a corresponding portion of the second predetermined section 5; peripheral grouting is carried out after the non-collapse part of the collapse section 4 is excavated, and block falling or secondary collapse is avoided; similarly, after excavating the corresponding part of the traction section 3, implementing peripheral grouting; and grouting the periphery of the first preset section 2 after excavation. In addition, it should be noted that peripheral grouting is a mature grouting process in the prior art, wherein in the present application, the circumferential spacing and the longitudinal spacing of the orifices of the grouting holes are 150cm and 150cm, the orifices of the grouting holes are arranged in a quincunx shape, and the grouting pipes adopt quincunx shapes
The hot-rolled seamless steel perforated pipe (the same material as the original advanced support) has the length of a single pipe of 300cm, and adopts pure cement slurry for grouting, wherein the water-cement ratio is 0.8: 1.
In addition, in the present application, the first predetermined section 2, the traction section 3, the collapse section 4 and the second predetermined section 5, which are divided and planned to be arranged in sequence, of the portion of the tunnel where collapse occurs, are in a range where collapse treatment is properly expanded, effective treatment, repair and reinforcement of the collapsed hole and the portion around the collapsed hole are ensured, the effect and quality of collapse treatment are ensured, and secondary collapse is avoided.
Next, the collapsed section 4 is reinforced, and the collapsed surface is subjected to a guniting treatment to close the collapsed surface, specifically, to be installed from the arch waist portion to the arch foot portion of the collapsed section 4
The length of the small guide pipe is 300cm, loose bodies backfilled into collapsed holes through back pressure are grouted for reinforcement, and pure cement slurry is used as grouting materials, wherein the water cement ratio is 0.8: 1; after grouting pre-reinforcement and collapsed surface treatment are completed, steel frames of the collapsed sections 4 are replaced one by one, foot-locking anchor pipes are repaired at positions of steel bar joints of the unstability sections (in the embodiment, the foot-locking anchor pipes can be common anchor rods and can also be self-drilling anchor rods according to design requirements), the steel frames are replaced and are firmly connected with the unstability steel frames, and a c20 concrete foundation is added at the arch waist joints to enable the joints to be connected into a whole, so that deformation prevention and stress diffusion effects are achieved, and the reinforcement effect of the collapsed sections 4 is guaranteed. For example, the distance between the longitudinal connecting steel bars of the arch frame can be adjusted to 50cm, an outer formwork of the arch frame is installed, double-layer steel bar meshes are installed, and then concrete is sprayed. And excavating the lower step surrounding rock one by one, and carrying out leg connection and spraying mixing to ensure the strength and stability of the arch frame.
Then, the primary reinforcing traction section 3 is performed, I18 h-beam rings are used for temporary reinforcing to stabilize the traction section 3, the distance between two h-beams is 60cm, an initial supporting surface is closely attached (the initial supporting is a safe construction protection measure during underground excavation construction), a gap is compacted by wood wedges and filled by spraying, and 4 steel wedges are arranged for each beam
And the length is 3m, the foot-locking anchor rod is longitudinally connected with a reinforcing steel bar, and the reinforcing steel bar adopts
And are arranged one by one at intervals of 100 cm.
Further, the collapsed cavity is backfilled by using bubble mixed light soil, and the wet volume weight of the bubble mixed light soil is preferably as follows: 5.5 to 6.5kN/m3, strongThe degree grade is preferably CF0.8, and the pre-buried pipe is adopted
And (5) pre-burying the steel pipe in sections according to lengths.
Wherein the bubble mixed light soil comprises a first backfill component and a second backfill component; stirring and mixing water and cement to form a first backfill component; adding a foaming agent and water into the diluent, mixing, diluting, transferring to a foaming device for foaming, continuously introducing compressed air into the diluent and the foaming device added with the foaming agent and water in the foaming process, enabling the foaming device to release bubble groups to form a second backfill component, mixing the first backfill component and the second backfill component to form bubble mixed light soil, and then conveying the bubble mixed light soil through a pipe pump to perform layered pouring on a target.
Preferably, the construction mixing ratio is cement: water: blowing agent 345: 205: 34, the specific mixing ratio is not limited thereto, but the obtained bubble mixed light soil has light weight and can ensure strength.
Reinforcing the traction section 3, namely performing advanced support (advanced support, which is an auxiliary measure adopted in advance of excavation of a tunnel face to ensure the stability of the excavation working face of tunnel engineering) on the traction section 3, and replacing steel frames one by one;
and (3) performing single-layer small conduit advanced support (the ultra-conduit support is within the range of 120 degrees of an arch part), replacing steel frames one by one, firmly connecting the arch-replacing steel frames with steel frames which are not unstable, and adjusting the distance between longitudinal connecting steel bars of the arch frame to 50cm from the original design of 100 cm.
Through example analysis, the tunnel collapse treatment method is particularly suitable for treating engineering construction of the palm surface collapse, the palm surface rear collapse and the primary support lateral collapse of the road tunnel. The method for treating the lateral collapse of the primary support of a certain tunnel comprises the following steps: the method comprises the steps of back pressure backfilling, concrete spraying and sealing of collapsed cavity rock surfaces of a collapse section 4, pre-reinforcing of a primary support section, concrete spraying and sealing and grouting reinforcement of collapsed body surfaces, grouting reinforcement of an arch wall, setting of a concrete strip foundation of arch feet of the collapse section 4, replacing steel frames of the collapse section 4 one by one and performing primary support, performing annular temporary reinforcement on steel frames of a traction section 3, backfilling collapsed cavities by adopting bubble mixed light soil, performing advanced support on the traction section 3, replacing steel frames one by one and the like, safely and quickly treating the collapse, effectively saving construction process time and reducing cost, and treating and reinforcing the collapse section 4, the traction section 3, a deformation section (including but not limited to a first preset section 2 and a second preset section 5) and the primary support section. The collapse treatment scheme is feasible in the implementation process, is successful in the result, provides precious experience for the collapse treatment of the tunnel under the adverse geological condition, and provides reference for the construction of the similar engineering.
Compared with the traditional collapse treatment method, the tunnel collapse treatment method provided by the embodiment of the application has the following characteristics:
1. the collapse section and the traction section are subjected to back pressure backfilling, so that the effects of stabilizing a collapse body, reducing an empty surface and forming an operation platform are achieved.
2. The steel frame increases the concrete bar basis in bow joint department, connects the joint an organic whole and plays the effect of prevention deformation and stress diffusion.
3. The collapse cavity is filled with the light soil mixed with bubbles in a segmented mode, a foaming agent is foamed by a mechanical method through a foaming system of a foaming machine, the foam generated by foaming is uniformly mixed with cement slurry, and then cast-in-place construction is carried out through a pumping system of the foaming machine.
4. The traction section and the deformation section are temporarily reinforced by adopting an annular steel frame and are tightly attached to the initial supporting surface, and the traction section is stabilized, so that the construction safety and reliability are ensured.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A tunnel collapse treatment method is characterized by comprising the following steps:
backfilling a collapsed body, wherein the collapsed body is formed with a collapsed section;
reinforcing a primary support section at least comprising the collapse section;
and filling the collapsed cavity of the collapsed body.
2. The method of treating tunnel collapse according to claim 1, wherein said preliminary bracing section comprises a first predetermined section, a traction section, said collapse section and a second predetermined section arranged in sequence in a direction from a start point to an end point of the tunnel.
3. The method for treating tunnel collapse according to claim 1, further comprising the steps of: and treating the rock surface of the collapsed cavity before carrying out back pressure backfill on the collapsed body.
4. The method for treating tunnel collapse according to claim 2, further comprising the steps of: reinforcing the collapsed section after reinforcing the preliminary bracing section.
5. The tunnel collapse treatment method according to claim 2, wherein the reinforcement of the preliminary bracing section including at least the collapsed section comprises the steps of: and recovering the primary support section.
6. The method of treating tunnel collapse according to claim 5, wherein recovering the preliminary bracing section comprises: preliminarily reinforcing the traction section; and replacing the steel frames of the collapsed sections one by one and reinforcing arch legs.
7. The method of treating tunnel collapse according to claim 6, further comprising the steps of: after filling the collapsed cavity of the collapsed body, reinforcing the traction section again.
8. The tunnel collapse treatment method according to any one of claims 1 to 7, wherein the filler used for backfilling the collapsed cavity is bubble-mixed light soil.
9. The tunnel collapse treatment method according to claim 8, wherein the bubble-mixed lightweight soil comprises:
a first backfill component comprising: water, cement;
a second backfill composition comprising: a foaming agent, water and a diluent, which can form a bubble group;
the first backfill component and the second backfill component are mixed to form the bubble-mixed lightweight soil.
10. The tunnel collapse treatment method according to any one of claims 1 to 7, wherein the collapsed body is a position where a collapse is formed, the collapsed body forms the collapsed cavity, an opening of the collapsed cavity forms a collapsed surface, and the collapsed surface corresponds to the collapsed section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643394.4A CN112814736B (en) | 2020-12-31 | 2020-12-31 | Tunnel collapse treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643394.4A CN112814736B (en) | 2020-12-31 | 2020-12-31 | Tunnel collapse treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112814736A true CN112814736A (en) | 2021-05-18 |
| CN112814736B CN112814736B (en) | 2023-01-31 |
Family
ID=75858266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011643394.4A Active CN112814736B (en) | 2020-12-31 | 2020-12-31 | Tunnel collapse treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112814736B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482657A (en) * | 2021-06-21 | 2021-10-08 | 中铁十六局集团第三工程有限公司 | Tunnel fault closed-door collapse processing and reinforcing method |
| CN113622957A (en) * | 2021-09-02 | 2021-11-09 | 中铁十八局集团有限公司 | Collapse treatment method suitable for TBM (Tunnel boring machine) unfavorable geological section with small cross section |
| CN113803089A (en) * | 2021-09-16 | 2021-12-17 | 中交一公局集团有限公司 | Artificial surrounding rock construction process for treating collapsed cavity of tunnel |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001032671A (en) * | 1999-07-16 | 2001-02-06 | Okumura Corp | Tunnel prelining construction method |
| CN101906977A (en) * | 2010-07-21 | 2010-12-08 | 中国矿业大学(北京) | Method for preventing and treating large deformation and collapse of softrock tunnel |
| CN105697033A (en) * | 2016-04-01 | 2016-06-22 | 长安大学 | Construction method for treating rock mass cavity without formworks in tunneling |
| CN106640130A (en) * | 2016-11-19 | 2017-05-10 | 中铁二十局集团第六工程有限公司 | Side-top arch collapse cavity supporting system and method for super-large-section tunnel in plateau region |
| CN110067572A (en) * | 2019-04-01 | 2019-07-30 | 中铁十二局集团有限公司 | Constructing tunnel passes through goaf emergency processing method |
| CN110608056A (en) * | 2019-09-29 | 2019-12-24 | 中铁二局集团有限公司 | Method for treating tunnel collapse of water-rich fault zone |
| CN110656954A (en) * | 2019-10-23 | 2020-01-07 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel collapse processing method for convergent collapsed cavity |
| CN111119910A (en) * | 2020-01-17 | 2020-05-08 | 中铁十九局集团第三工程有限公司 | Tunnel collapse section back-blowing sand grouting backfill structure and construction method thereof |
| CN111608696A (en) * | 2020-06-28 | 2020-09-01 | 四川省公路规划勘察设计研究院有限公司 | Tunnel collapsed cavity repairing structure and construction method |
-
2020
- 2020-12-31 CN CN202011643394.4A patent/CN112814736B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001032671A (en) * | 1999-07-16 | 2001-02-06 | Okumura Corp | Tunnel prelining construction method |
| CN101906977A (en) * | 2010-07-21 | 2010-12-08 | 中国矿业大学(北京) | Method for preventing and treating large deformation and collapse of softrock tunnel |
| CN105697033A (en) * | 2016-04-01 | 2016-06-22 | 长安大学 | Construction method for treating rock mass cavity without formworks in tunneling |
| CN106640130A (en) * | 2016-11-19 | 2017-05-10 | 中铁二十局集团第六工程有限公司 | Side-top arch collapse cavity supporting system and method for super-large-section tunnel in plateau region |
| CN110067572A (en) * | 2019-04-01 | 2019-07-30 | 中铁十二局集团有限公司 | Constructing tunnel passes through goaf emergency processing method |
| CN110608056A (en) * | 2019-09-29 | 2019-12-24 | 中铁二局集团有限公司 | Method for treating tunnel collapse of water-rich fault zone |
| CN110656954A (en) * | 2019-10-23 | 2020-01-07 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel collapse processing method for convergent collapsed cavity |
| CN111119910A (en) * | 2020-01-17 | 2020-05-08 | 中铁十九局集团第三工程有限公司 | Tunnel collapse section back-blowing sand grouting backfill structure and construction method thereof |
| CN111608696A (en) * | 2020-06-28 | 2020-09-01 | 四川省公路规划勘察设计研究院有限公司 | Tunnel collapsed cavity repairing structure and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 冉思荣: "浅谈白勉峡隧道初支塌方处理方案", 《广东科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482657A (en) * | 2021-06-21 | 2021-10-08 | 中铁十六局集团第三工程有限公司 | Tunnel fault closed-door collapse processing and reinforcing method |
| CN113622957A (en) * | 2021-09-02 | 2021-11-09 | 中铁十八局集团有限公司 | Collapse treatment method suitable for TBM (Tunnel boring machine) unfavorable geological section with small cross section |
| CN113803089A (en) * | 2021-09-16 | 2021-12-17 | 中交一公局集团有限公司 | Artificial surrounding rock construction process for treating collapsed cavity of tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112814736B (en) | 2023-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112814736B (en) | Tunnel collapse treatment method | |
| CN107849917B (en) | Tunnel construction method using advance support and lag support and device suitable for same | |
| CN109854255B (en) | Method for processing tunnel unconverged collapse | |
| CN109538216B (en) | Tunnel construction process for crossing mining and subsidence areas | |
| CN112228082B (en) | Tunnel collapse treatment method by combined grouting of pipe shed and advanced small guide pipe | |
| CN108798702B (en) | Supporting method for large-section soft rock large-deformation tunnel | |
| CN110656954B (en) | Tunnel collapse processing method for convergent collapsed cavity | |
| CN109209392B (en) | Full-ring excavation method suitable for IV-V-grade surrounding rock of large-section tunnel | |
| CN113153308B (en) | Construction method for collapse section of double-arch tunnel | |
| CN110424380B (en) | Accurate guiding construction method for cast-in-situ bored pile | |
| CN111335923B (en) | Construction method for large deformation of soft rock of tunnel with unfavorable geology | |
| CN106968139B (en) | Construction method for railway roadbed support in jacking process of underpass railway jacking frame bridge | |
| CN111365017B (en) | Construction method of underground intercommunication tunnel | |
| JP2023500745A (en) | A Comprehensive Construction Method for a Tunnel with Low Overburden Section Using the Regional Railway Mining Method | |
| CN108561156A (en) | Separate tunnel changes arch supporting construction and its construction method | |
| CN109371987A (en) | Pre-stress anti-slide pile supporting comprehensive construction method in a kind of back fill course | |
| CN114562289A (en) | Rapid treatment method for large-scale cavity collapse of soft broken surrounding rock tunnel vault | |
| CN107218062B (en) | A kind of construction method of contrary sequence method processing Tunnel Collapse | |
| CN105840209B (en) | Construction method for controlling deformation of anchor pile in tunnel body section | |
| CN107191196A (en) | Through the anti-skidding shearing resistance administration structure of the inter-laminar dislocation band of great burying underground chamber and construction method | |
| CN115370376B (en) | Construction method suitable for collapse treatment of large-span expansion tunnel | |
| CN113803092B (en) | Supporting device and method for broken soft rock roadway based on steel pipe concrete support | |
| CN112682048B (en) | Replacement reinforcement construction method for small clear distance up-span existing tunnel of newly-built tunnel | |
| CN109026031B (en) | Reconstruction construction method for collapsed section of gas tunnel after strong earthquake | |
| CN115030731A (en) | Pilot tunnel construction method in cross tunnel engineering |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |