CN212272246U - Can realize tunnel assembled supporting construction of dynamic reinforcement - Google Patents
Can realize tunnel assembled supporting construction of dynamic reinforcement Download PDFInfo
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- CN212272246U CN212272246U CN202020837555.2U CN202020837555U CN212272246U CN 212272246 U CN212272246 U CN 212272246U CN 202020837555 U CN202020837555 U CN 202020837555U CN 212272246 U CN212272246 U CN 212272246U
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Abstract
The utility model discloses a tunnel assembled supporting structure capable of realizing dynamic reinforcement, which comprises a primary supporting structure and a reinforcing structure; flanges are arranged on four sides of a prefabricated corrugated plate in the primary support structure and are used for connecting corrugated plates, reinforcing rib plates are arranged between the flanges and the prefabricated corrugated plates, and filling layers are filled between tunnel surrounding rocks and the corrugated plates; according to different reinforcement stress characteristics, the composite reinforced concrete structure is divided into a steel pipe core concrete structure suitable for reinforcing a certain cross section of a tunnel and a laminated buckled plate lining structure suitable for reinforcing a tunnel supporting structure in a certain length range; the primary supporting structure and the reinforcing structure form a composite stress structure. The structure can meet the supporting requirements under different surrounding rock stress levels, can realize dynamic reinforcement of a supporting structure, and has the advantages of high safety, high construction speed, environmental friendliness and low construction cost.
Description
Technical Field
The utility model relates to a tunnel support field specifically is a can realize tunnel assembled supporting construction of dynamic reinforcement.
Background
Mountain tunnels or urban subway tunnels are still constructed by adopting a mining method, steel gratings and sprayed concrete are adopted as a tunnel primary supporting structure in the method, and the sprayed concrete construction has the problems of serious environmental pollution, complex process, low construction efficiency and the like. In order to solve the above problems, there are construction methods using fabricated corrugated plates as a preliminary supporting structure of a tunnel (CN 108397215 a, CN 209586398U, CN 107780949 a). However, in the existing construction methods, the primary support structure is crushed and fails due to overlarge load of the surrounding rock in the high-stress surrounding rock or expansive surrounding rock area. In addition, the surrounding rock distribution has non-uniformity, so that the surrounding rock pressures at different positions of the whole line are different, if a uniform high-strength primary support structure is adopted according to the maximum load, the waste of materials is caused, and if a primary support structure with lower strength is adopted, the structural collapse failure is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can realize tunnel assembled supporting construction of developments reinforcement to solve the problem that proposes in the above-mentioned background art.
A tunnel assembled supporting structure capable of realizing dynamic reinforcement comprises a primary supporting structure and a reinforcing structure;
the primary supporting structure consists of a prefabricated steel structure and a filling layer;
the prefabricated steel structure comprises a prefabricated corrugated plate, a flange plate and a reinforcing rib plate;
the four sides of the prefabricated corrugated plate are provided with flange plates, and the flange plates are provided with bolt holes for connecting and fixing the corrugated plate structures;
the reinforcing rib plate is arranged between the flange plate and the prefabricated corrugated plate;
a preformed hole which can be connected with the reinforcing structure is reserved on the corrugated plate structure;
the filling layer is filled between the tunnel surrounding rock and the corrugated plate structure;
the reinforcing structure is used for improving the bearing capacity of the corrugated plate structure and can be divided into a steel pipe core concrete structure and a lining structure of a laminated buckled plate according to different reinforcing stress characteristics;
the steel pipe core concrete structure comprises steel pipes, concrete and an anchor ear, wherein the steel pipes and the prefabricated corrugated plate structural part are fixed through the anchor ear, and the steel pipe core concrete structure is formed in a mode that concrete is injected into preformed holes in the steel pipes, so that the steel pipe core concrete structure is suitable for reinforcing a certain cross section of a tunnel and is called a section reinforcing method;
the lining structure of the overlapped buckled plate comprises a lining corrugated plate, the lining corrugated plate is provided with preformed holes which are symmetrical to the prefabricated corrugated plate, a zone reinforcing method is formed by connecting and fixing the lining corrugated plate and the prefabricated corrugated plate through bolts, the method is suitable for reinforcing a tunnel supporting structure within a certain length range and is called as a zone reinforcing method, and the range of reinforcement of the lining structure of the overlapped buckled plate is larger;
the primary supporting structure and the reinforcing structure form a composite stressed structure.
The tunnel assembly type supporting structure capable of realizing dynamic reinforcement preferably adopts the filling layer made of cement mortar, concrete or high polymer materials.
The tunnel assembly type supporting structure capable of realizing dynamic reinforcement has the preferred scheme that the reinforcement structure can be detached and reused.
The tunnel assembled supporting structure capable of realizing dynamic reinforcement has the preferred scheme that the preformed hole can also be used as a grouting hole.
A construction method of a tunnel assembled supporting structure capable of realizing dynamic reinforcement comprises the following steps: 1) excavating a tunnel according to a designed section of the tunnel to form a tunnel excavation boundary, wherein the designed section of the tunnel can be circular, horseshoe-shaped or straight-wall arch-shaped, and different corrugated plate structures can be prefabricated according to different designed section forms;
2) assembling prefabricated corrugated plates matched with the designed section of the tunnel in the excavated tunnel space to form a closed-loop structure, wherein the structure is high in closing speed and can ensure construction safety;
3) grouting and filling construction is carried out on the back of the prefabricated corrugated plate, a grouting pipe penetrates through the reserved grouting hole, construction is carried out by adopting a retreating type grouting method, and the compactness of a filling layer is guaranteed;
4) to the additional load or special geology circumstances such as meet in the tunnel supporting work progress, construct the reinforcement structure according to the demand, accomplish fixed connection through the preformed hole between reinforcement structure and the prefabricated corrugated plate structure for corrugated plate structure and reinforcement structure form compound stress structure, realize the purpose that bears jointly, thereby improve tunnel supporting construction's total bearing capacity, guarantee the tunnel supporting safety of special circuit section.
The utility model provides a can realize tunnel assembled supporting construction's of dynamic reinforcement theory of operation: the method is characterized in that surrounding media of the tunnel engineering are surrounding rocks, and when the assembled structure is adopted for supporting the tunnel engineering, a layer of material with certain mechanical characteristics needs to be filled between the surface of the surrounding rocks formed by excavation and the prefabricated steel structure, so that the rear wall of the prefabricated structure is tightly attached to a filling layer, and the filling layer is tightly attached to the surrounding rocks, thereby forming a 'prefabricated steel structure-filling layer' primary supporting structure system. The prefabricated steel structure is installed inside the tunnel which is formed by excavation, an interface which can be connected with a reinforcing structure is reserved on the corrugated plate structure, and the reserved connecting interface can be used as a grouting hole. The prefabricated corrugated plate structure four sides have the ring flange, have the bolt hole on the ring flange for the corrugated plate structure is fixed in connection each other, is provided with the reinforced rib board between ring flange and the prefabricated corrugated plate, and the ring flange is out of shape when preventing corrugated plate structure atress bending, avoids forming at the junction and opens the crack. The reinforcing structure is used for improving the bearing capacity of the corrugated plate structure and fixedly connected with the prefabricated corrugated plate structure through bolts. The structure can meet the technical requirements of rapid tunnel construction and environmental protection, can ensure the safety of tunnel support, and reduces the engineering cost to the maximum extent.
Compared with the prior art, the beneficial effects of the utility model are that:
1) aiming at the problems of high stress and large deformation of surrounding rocks caused by complex geological conditions of the tunnel, the assembled tunnel supporting structure capable of realizing dynamic reinforcement of the supporting structure is provided, the dynamic reinforcement of the primary supporting structure of the tunnel can be met, and the supporting safety of the tunnel is guaranteed;
2) the prefabricated steel structure and the back filling layer composite tunnel primary support structure realize the assembly construction of the tunnel support, effectively improve the construction efficiency, improve the construction operation environment and reduce the construction cost;
3) the method has the advantages that a plurality of reinforcing forms such as section reinforcing and area reinforcing are provided, the reinforcing forms respectively correspond to a steel pipe-core concrete structure and a laminated buckle corrugated plate lining structure, the method is suitable for the reinforcing requirements of tunnel supporting structures of different types, the targeted reinforcing of the tunnel supporting structure is realized, and the accurate reinforcing and the effective reinforcing of the tunnel supporting structure are ensured;
4) when the deformation of the surrounding rock is stable, if the evaluation shows that the secondary lining structure and the prefabricated corrugated plate structure can meet the supporting requirement of the tunnel, the reinforcing structure can be recycled, so that the engineering cost is reduced to the maximum extent;
5) the structure has the technical advantages of dynamic reinforcement, recycling, quick construction, economy, environmental protection, shortened construction period, reduced engineering cost and the like.
Drawings
FIG. 1 is a schematic view of a pre-corrugated sheet construction;
FIG. 2 is a sectional view of tunnel excavation;
FIG. 3 is a cross-sectional view of a corrugated plate support for a tunnel;
FIG. 4 is a cross-sectional view of a tunnel filling layer;
FIG. 5 is a schematic view of a cross-sectional reinforcement structure;
fig. 6 is a schematic view of a region reinforcing structure.
In the figure: 1. prefabricated steel construction, 2, steel pipe core concrete structure, 3, prefabricated buckled plate, 4, ring flange, 5, reinforcing floor, 6, bolt hole, 7, preformed hole, 8, filling layer, 9, fold and detain buckled plate inner lining structure, 10, staple bolt, 11, steel pipe, 12, concrete, 13, country rock, 14, bolt, 15, inside lining buckled plate, 16, tunnel excavation boundary.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1-6 show a tunnel assembled supporting structure capable of implementing dynamic reinforcement, the supporting structure includes a primary supporting structure and a reinforcing structure;
the primary supporting structure consists of a prefabricated steel structure 1 and a filling layer 8;
the prefabricated steel structure comprises a prefabricated corrugated plate 3, a flange plate 4 and a reinforcing rib plate 5;
the four sides of the prefabricated corrugated plate 3 are provided with flange plates 4, and the flange plates 4 are provided with bolt holes 6 for connecting and fixing the corrugated plate structures through bolts 14;
the reinforcing rib plate 5 is arranged between the flange plate 4 and the prefabricated corrugated plate 3;
a preformed hole 7 which can be connected with a reinforcing structure is reserved on the corrugated plate structure;
the filling layer 8 is filled between the tunnel surrounding rock and the corrugated plate structure;
the reinforcing structure is used for improving the bearing capacity of the corrugated plate structure and can be divided into a steel pipe core concrete structure 2 and a lining structure 9 of a laminated buckled plate according to different reinforcing stress characteristics;
the steel pipe core concrete structure 2 comprises steel pipes 11, concrete 12 and an anchor ear 10, the steel pipes 11 and the prefabricated corrugated plates 3 are fixed through the anchor ear 10, the steel pipe core concrete structure 2 is formed in a mode that concrete 12 is injected into preformed holes in the steel pipes 11, and the steel pipe core concrete structure is suitable for reinforcing a certain cross section of a tunnel and is called a section reinforcing method;
the lining structure 9 of the overlapped buckled plate comprises a lining corrugated plate 15, the lining corrugated plate 15 is provided with preformed holes which are symmetrical to the prefabricated corrugated plate 3, and an area reinforcing method is formed by connecting and fixing the lining corrugated plate 15 and the prefabricated corrugated plate 3 through bolts 14, so that the method is suitable for reinforcing a tunnel supporting structure in a certain length range, and the range of reinforcement of the lining structure of the overlapped buckled plate is larger;
the primary supporting structure and the reinforcing structure form a composite stressed structure.
The filling layer 8 is made of cement mortar, concrete or high molecular polymer materials.
The reinforcing structure can be detached and reused.
The prepared hole 7 can also be used as a grouting hole.
A construction method of a tunnel assembled supporting structure capable of realizing dynamic reinforcement comprises the following steps: 1) excavating a tunnel according to a designed section of the tunnel to form a tunnel excavation boundary 16, wherein the designed section of the tunnel can be circular, horseshoe-shaped or straight-wall arch-shaped, and different corrugated plate structures can be prefabricated according to different designed section forms;
2) assembling the prefabricated corrugated plate 3 matched with the designed section of the tunnel in the excavated tunnel space to form a closed-loop structure, wherein the structure is high in closing speed and can ensure the construction safety;
3) grouting and filling construction is carried out after the back of the prefabricated corrugated plate 3, a grouting pipe penetrates through the preformed hole 7, construction is carried out by adopting a retreating type grouting method, and the compactness of a filling layer 8 is guaranteed;
4) to additional load or special geology circumstances such as meet in the tunnel support work progress, construct the reinforcement structure according to the demand, through preformed hole 7 fixed connection between reinforcement structure and the prefabricated buckled plate 3 for prefabricated buckled plate 3 forms compound stress structure with the reinforcement structure, realizes the purpose that bears jointly, thereby improves tunnel supporting construction's total bearing capacity, ensures the tunnel support safety of special circuit section.
The utility model provides a can realize tunnel assembled supporting construction's of dynamic reinforcement theory of operation: the surrounding medium of the tunnel engineering is surrounding rock 13, when the assembled structure is adopted for tunnel engineering supporting, a layer of material with certain mechanical characteristics needs to be filled between the surface of the surrounding rock 13 formed by excavation and the prefabricated steel structure 1, so that the rear wall of the prefabricated steel structure 1 is tightly attached to the filling layer 8, and the filling layer 8 is tightly attached to the surrounding rock 13, thereby forming a 'prefabricated steel structure-filling layer' primary supporting structure system. The prefabricated steel structure is installed inside the excavated tunnel, and the interface preformed hole 7 capable of being connected with the reinforcing structure is reserved on the corrugated plate structure and can be used as a grouting hole. Prefabricated corrugated plate structure four sides has ring flange 4, has bolt hole 6 on the ring flange 4 for corrugated plate structure is fixed in connection each other, is provided with reinforced rib plate 5 between ring flange 4 and prefabricated buckled plate 3, and ring flange 4 is out of shape when preventing corrugated plate structure atress bending, avoids opening the crack in the junction formation. The reinforcing structure is used for improving the bearing capacity of the corrugated plate structure, and is fixedly connected with the prefabricated corrugated plate 3 through the bolt 14. The structure can meet the technical requirements of rapid tunnel construction and environmental protection, can ensure the safety of tunnel support, and reduces the engineering cost to the maximum extent.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention.
Claims (4)
1. The utility model provides a can realize tunnel assembled supporting construction of dynamic reinforcement which characterized in that: the supporting structure comprises a primary supporting structure and a reinforcing structure;
the primary supporting structure consists of a prefabricated steel structure and a filling layer;
the prefabricated steel structure comprises a prefabricated corrugated plate, a flange plate and a reinforcing rib plate;
the four sides of the prefabricated corrugated plate are provided with flange plates, and the flange plates are provided with bolt holes for connecting and fixing the corrugated plate structures;
the reinforcing rib plate is arranged between the flange plate and the prefabricated corrugated plate;
a preformed hole which can be connected with the reinforcing structure is reserved on the corrugated plate structure;
the filling layer is filled between the tunnel surrounding rock and the corrugated plate structure;
the reinforcing structure is used for improving the bearing capacity of the corrugated plate structure and can be divided into a steel pipe core concrete structure and a lining structure of a laminated buckled plate according to different reinforcing stress characteristics;
the steel pipe core concrete structure comprises steel pipes, concrete and an anchor ear, wherein the steel pipes and the prefabricated corrugated plate structural member are fixed through the anchor ear, and the steel pipe core concrete structure is formed in a mode that concrete is injected into preformed holes in the steel pipes;
the lining structure of the overlapped buckled plate comprises a lining buckled plate, preformed holes symmetrical to the prefabricated buckled plate are formed in the lining buckled plate, regional reinforcement is formed in a mode that the lining buckled plate and the prefabricated buckled plate are connected and fixed through bolts, and the range of reinforcement of the lining structure of the overlapped buckled plate is larger;
the primary supporting structure and the reinforcing structure form a composite stressed structure.
2. The assembled tunnel supporting structure capable of realizing dynamic reinforcement of claim 1, wherein: the filling layer is made of cement mortar, concrete or high molecular polymer materials.
3. The assembled tunnel supporting structure capable of realizing dynamic reinforcement of claim 1, wherein: the reinforcing structure can be detached and reused.
4. The assembled tunnel supporting structure capable of realizing dynamic reinforcement of claim 1, wherein: the prepared hole is used as a grouting hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020837555.2U CN212272246U (en) | 2020-05-19 | 2020-05-19 | Can realize tunnel assembled supporting construction of dynamic reinforcement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020837555.2U CN212272246U (en) | 2020-05-19 | 2020-05-19 | Can realize tunnel assembled supporting construction of dynamic reinforcement |
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| CN202020837555.2U Active CN212272246U (en) | 2020-05-19 | 2020-05-19 | Can realize tunnel assembled supporting construction of dynamic reinforcement |
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