CN111734438A - Collapse-preventing reinforced support structure for tunnel with expansive soil matrix layer - Google Patents
Collapse-preventing reinforced support structure for tunnel with expansive soil matrix layer Download PDFInfo
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- 238000013016 damping Methods 0.000 claims abstract description 30
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 19
- 230000002265 prevention Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000035939 shock Effects 0.000 claims description 38
- 238000010521 absorption reaction Methods 0.000 claims description 31
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- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 6
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- 229920000126 latex Polymers 0.000 claims description 6
- 239000011115 styrene butadiene Substances 0.000 claims description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
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- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
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Classifications
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides an expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure, which belongs to the field of tunnel disaster prevention construction and comprises an expansive soil tunnel matrix layer, an outer layer support fixedly connected with a top arch frame plate, an inner layer support fixedly connected with a bottom arch frame plate, an outer ring arc segment reinforcing and connecting baffle plate, an inner ring arc segment reinforcing and connecting baffle plate, an outer layer energy dissipation and damping hose structure, an outer layer hose built-in cavity, a middle layer energy dissipation and damping hose structure, a middle layer hose built-in cavity, an inner layer energy dissipation and damping hose structure, an inner layer hose built-in cavity, a mixed filling layer, a bearing bottom matrix layer support stabilizing device, a sealing plate and a pre-support anchor piece, wherein the outer layer support is fixedly connected with the top arch frame plate above the inner side of the expansive soil tunnel, can control the tunnel collapse danger and reduce the vibration reaction.
Description
Technical Field
The invention belongs to the field of tunnel disaster prevention construction, and particularly relates to an anti-collapse reinforced supporting structure for a tunnel with an expansive soil matrix layer.
Background
Expansive soil (expansive soil) is also called "expansive soil". After soaking in water, the volume is expanded violently, and after dehydration, the volume is contracted obviously. The soil contains more clay minerals such as montmorillonite and illite, so that the soil is very hydrophilic. When the natural water content is higher, the expansion amount and the expansion force after water immersion are smaller, the shrinkage amount and the contraction force after water loss are larger, when the natural pore ratio is larger, the expansion amount and the expansion force are smaller, and the shrinkage amount and the contraction force are larger. However, in the construction process, it is found that the geological conditions of the surrounding rock are complex and changeable, the self-bearing capacity of the surrounding rock is weak in a rock mass crushing area, particularly in a fracture crushing zone area, the structure of the surrounding rock is extremely unstable, and great influence is caused on the safety of the tunnel. However, due to the restriction of the space in the cavern and the construction trolley and the influence of the construction process, the primary lining cannot be closed to form a ring in time, the construction of the secondary lining is usually lagged behind that of the primary lining, and the construction interval generally reaches more than 70 m. Before the primary lining is sealed and looped, the end part of the steel arch frame is generally reinforced by a foot-locking anchor rod, but the surrounding rock in a fracture and breakage zone is broken, the reinforcing effect of the foot-locking anchor rod is limited, and the grouting can take the anchoring effect for a while, so the primary lining collapse accident often occurs in the engineering, the construction progress and the engineering safety are seriously influenced, sometimes, when special conditions such as earthquake occur, the vibration causes the main structure of a mountain tunnel to generate earthquake reaction, possibly causes the main structure to be damaged in strong earthquake, therefore, the control loss, the increase of the safety coefficient and the reduction of the structural vibration reaction are the problems which need to be solved currently in series of engineering such as mountain tunnel building structures and the like, the adverse factors provide greater challenges for the construction safety of tunnel portals, and the damage to the fixed devices is caused by the extrusion of the soil during water absorption and expansion, particularly, when a tunnel is built in expansive soil, engineering accidents are easily caused when the traditional tunnel supporting device is used for supporting, and in addition, the deformation of surrounding rocks is difficult to control, so that how to design the device for preventing collapse when the tunnel is built in the expansive soil is very important.
Disclosure of Invention
In order to solve the technical problems, the invention provides an expansive soil matrix layer tunnel collapse prevention reinforced supporting structure, which overcomes the problem that the tunnel collapse engineering accident danger is easily caused by severe volume expansion after a special expansive soil tunnel matrix layer is soaked in water, has enough supporting strength and shock resistance, can bear the larger deformation of the expansive soil matrix layer, plays the roles of shock resistance supporting and shock effect elimination, and can control the tunnel collapse danger and reduce the shock reaction.
In order to achieve the purpose, the invention adopts the technical scheme that:
an anti-collapse reinforced support structure for an expansive soil matrix layer tunnel comprises an expansive soil tunnel matrix layer, an outer support fixedly connected top arch frame plate, an inner support fixedly connected bottom arch frame plate, an outer ring arc segment reinforced connecting baffle plate, an inner ring arc segment reinforced connecting baffle plate, an outer energy-consuming damping hose structure, an outer hose built-in cavity, a middle energy-consuming damping hose structure, a middle hose built-in cavity, an inner energy-consuming damping hose structure, an inner hose built-in cavity, a mixed filling layer, a bearing bottom support stabilizing device, a sealing plate and a pre-support anchor, wherein the outermost layer of the anti-collapse reinforced support structure for the expansive soil matrix layer tunnel is the expansive soil tunnel matrix layer, the outer support fixedly connected top arch frame plate is arranged above the inner side of the expansive soil tunnel matrix layer, the inner side of the outer support fixedly connected top arch frame plate is provided with an, the inner side of the outer ring arc-shaped section reinforced connecting partition plate is provided with an inner ring arc-shaped section reinforced connecting partition plate, and the inner side of the inner ring arc-shaped section reinforced connecting partition plate is provided with an inner layer supporting and fixedly connected with a bottom arch frame plate;
a plurality of outer energy-consuming damping hose structures and mixed filling layers are arranged between the outer support fixed connection top arch support plate and the outer ring arc-shaped section reinforced connection partition plate, an outer hose built-in cavity is arranged inside the outer energy-consuming damping hose structure, a plurality of middle energy-consuming damping hose structures and mixed filling layers are arranged between the outer ring arc-shaped section reinforced connection partition plate and the inner ring arc-shaped section reinforced connection partition plate, a middle hose built-in cavity is arranged inside the middle energy-consuming damping hose structure, a plurality of inner energy-consuming damping hose structures and mixed filling layers are arranged between the inner support fixed connection bottom arch support plate and the inner ring arc-shaped section reinforced connection partition plate, and an inner hose built-in cavity is arranged inside the inner energy-consuming damping hose structure; the pre-support anchor is formed by connecting a fixing sheet plate and a pre-support anchor rod, the pre-support anchor rod is provided with barbs, one end of the pre-support anchor rod is arranged in the expansive soil tunnel matrix layer, the other end of the pre-support anchor rod penetrates through the outer layer support to be fixedly connected with the top arch frame plate and is fixedly connected with the fixing sheet plate in the mixed filling layer, and a sealing plate is arranged to fixedly connect the outer layer support with the top arch frame plate and fixedly connect the inner layer support with the front end part and the rear end part of the bottom arch;
the bottom supporting and stabilizing device is arranged below the top arch frame plate fixedly connected with the outer layer support and the bottom arch frame plate fixedly connected with the inner layer support, the bottom supporting and stabilizing device is formed by a supporting connecting plate at the upper end, lateral energy dissipation and shock absorption supporting plates at the left side and the right side, a base connecting plate at the lower end and end vertical plates at the front side and the rear side in a surrounding mode, a plurality of fixed connecting hinges, movable connecting hinges and a supporting shock absorption cylinder structure are arranged inside the bottom supporting and stabilizing device, the fixed connecting hinges are fixed on the inner surface of the bottom supporting and stabilizing device, the movable connecting hinges are distributed in the middle of the fixed connecting hinges, connecting coordination supporting rod components are arranged to connect the fixed connecting hinges and the movable connecting hinges in a diamond structure formed by the connecting coordination supporting rod components, the supporting shock absorption cylinder structure is arranged inside the supporting shock absorption, A vertical damping spring structure is arranged between the base connecting plate and the adjacent movable connecting hinge, a horizontal shearing damping spring is arranged between the lateral energy dissipation damping support plate and the adjacent movable connecting hinge, and the rest cavities in the bearing bottom support stabilizing device structure are provided with weight increasing bearing reinforcing layers;
furthermore, the mixed filling layer is a mixed layer of rubber fiber and concrete, 2.5kg-4.5kg of rubber fiber material is added in each cubic meter of concrete, and the rubber fiber material is processed and manufactured by adopting waste tires.
Furthermore, the left end and the right end of the outer-layer support fixed connection top arch frame plate and the inner-layer support fixed connection bottom arch frame plate are both fixed with the support connection plate.
Furthermore, the outer ring arc-shaped section reinforced connecting partition plate, the inner ring arc-shaped section reinforced connecting partition plate, the outer layer energy dissipation and shock absorption hose structure, the middle layer energy dissipation and shock absorption hose structure, the inner layer energy dissipation and shock absorption hose structure and the lateral part energy dissipation and shock absorption support plate are made of low yield point steel plates determined according to design requirements.
Furthermore, the weight-increasing bearing reinforcing layer is prepared by mixing a fine gravel layer and styrene-butadiene latex, and the volume percentage of the styrene-butadiene latex is 20-30%.
Furthermore, the energy dissipation round holes are distributed on the lateral energy dissipation shock absorption support plate at equal intervals, and the specific number and the size of the round holes are determined according to the actual loose and compact degree of the matrix layer structure of the expansive soil tunnel.
The invention has the advantages and effects that:
the anti-collapse reinforced support structure for the tunnel of the expansive soil matrix layer has the advantages that the risk that the tunnel collapse engineering accident is easily caused by severe volume expansion after the special expansive soil tunnel matrix layer is soaked in water is overcome, the anti-collapse reinforced support structure has enough support strength and anti-seismic capacity, can bear larger deformation of the expansive soil matrix layer, plays roles of anti-seismic support and vibration effect elimination, can control the risk of tunnel collapse and reduce vibration reaction, and can control the deformation of surrounding rocks near the tunnel.
Drawings
Fig. 1 is a schematic side view of the collapse prevention reinforcing support structure for the tunnel of the expansive soil matrix layer.
Fig. 2 is a schematic view of a vertical section of the collapse prevention reinforcing support structure for the tunnel of the expansive soil matrix layer.
FIG. 3 is a schematic view of a pre-support anchor construction.
FIG. 4 is a schematic view of the structure of the load-bearing bottom-supporting stabilizer.
In the figure: 1 is an expansive soil tunnel matrix layer; 2, an outer layer support is fixedly connected with a top arch frame plate; 3, an inner layer support is fixedly connected with the bottom arch frame plate; 4, an outer ring arc-shaped segment is reinforced and connected with the partition plate; 5, an inner ring arc-shaped segment is reinforced and connected with the clapboard; 6, an outer-layer energy dissipation and shock absorption hose structure; 7 is a cavity arranged in the outer layer hose; 8 is a middle-layer energy dissipation and shock absorption hose structure; 9 is a middle layer hose built-in cavity; 10 is an inner layer energy dissipation and shock absorption hose structure; 11 is a cavity arranged in the inner hose; 12 is a mixed filling layer; 13 is a bearing bottom supporting and stabilizing device; 14 is a supporting connecting plate; 15 is a lateral energy dissipation shock absorption support plate; 16 is a base connecting plate; 17 is a horizontal shearing shock absorbing spring; 18 is a vertical damping spring structure; 19 weight-increasing load-bearing reinforced layer; 20 is a supporting shock-absorbing cylinder structure; 21 is a built-in silica gel damping layer; 22 is a fixed connecting hinge; 23 is a movable connecting hinge; 24 is a connecting and coordinating support rod component; 25 is a sealing plate; 26 is an end riser; 27 is a pre-support anchor; 28 is a fixed sheet plate; 29 is a pre-support anchor rod; the barb 30 is formed.
Detailed Description
In order to further illustrate the present invention, the following detailed description of the present invention is given with reference to the accompanying drawings and examples, which should not be construed as limiting the scope of the present invention.
Example (b): as shown in fig. 1 to 4, an anti-collapse reinforced support structure for an expansive soil matrix layer tunnel comprises an expansive soil tunnel matrix layer 1, an outer-layer support fixedly connected top arch frame plate 2, an inner-layer support fixedly connected bottom arch frame plate 3, an outer-ring arc-segment reinforced connecting baffle plate 4, an inner-ring arc-segment reinforced connecting baffle plate 5, an outer-layer energy-consuming and shock-absorbing hose structure 6, an outer-layer hose built-in cavity 7, a middle-layer energy-consuming and shock-absorbing hose structure 8, a middle-layer hose built-in cavity 9, an inner-layer energy-consuming and shock-absorbing hose structure 10, an inner-layer hose built-in cavity 11, a mixed filling layer 12, a bearing bottom support stabilizing device 13, a sealing plate 25 and a pre-support anchor 27, wherein the outermost layer of the anti-collapse reinforced support structure for the expansive soil matrix layer tunnel is the expansive soil, the inner side of the outer layer support fixed connection top arch frame plate 2 is provided with an outer ring arc-shaped section reinforced connection clapboard 4, the inner side of the outer ring arc-shaped section reinforced connection clapboard 4 is provided with an inner ring arc-shaped section reinforced connection clapboard 5, and the inner side of the inner ring arc-shaped section reinforced connection clapboard 5 is provided with an inner layer support fixed connection bottom arch frame plate 3;
a plurality of outer energy-consuming and damping hose structures 6 and mixed filling layers 12 are arranged between the outer support fixed connection top arch support plate 2 and the outer ring arc-shaped section reinforced connection partition plate 4, an outer hose built-in cavity 7 is arranged inside the outer energy-consuming and damping hose structure 6, a plurality of middle energy-consuming and damping hose structures 8 and mixed filling layers 12 are arranged between the outer ring arc-shaped section reinforced connection partition plate 4 and the inner ring arc-shaped section reinforced connection partition plate 5, a middle hose built-in cavity 9 is arranged inside the middle energy-consuming and damping hose structure 8, a plurality of inner energy-consuming and damping hose structures 10 and mixed filling layers 12 are arranged between the inner support fixed connection bottom arch support plate 3 and the inner ring arc-shaped section reinforced connection partition plate 5, and an inner hose built-in cavity 11 is arranged inside the inner layer energy; the pre-support anchor 27 is formed by connecting a fixing sheet plate 28 and a pre-support anchor rod 29, a barb 30 is arranged on the pre-support anchor rod 29, one end of the pre-support anchor rod 29 is arranged in the expansive soil tunnel matrix layer 1, the other end of the pre-support anchor rod 29 penetrates through the outer layer support fixed connection top arch frame plate 2 to be fixedly connected with the fixing sheet plate 28 in the mixed filling layer 12, and a sealing plate 25 is arranged to fixedly connect the outer layer support fixed connection top arch frame plate 2 and the inner layer support fixed connection bottom arch frame plate 3 at the front end and the rear end;
a bearing bottom supporting and stabilizing device 13 is arranged below the outer layer supporting and fixedly connecting top arch frame plate 2 and the inner layer supporting and fixedly connecting bottom arch frame plate 3, the bearing bottom supporting and stabilizing device 13 is formed by enclosing a supporting connecting plate 14 at the upper end, lateral energy dissipation and shock absorption supporting plates 15 at the left and right sides, a base connecting plate 16 at the lower end and end vertical plates 26 at the front and rear sides, a plurality of fixed connecting hinges 22, movable connecting hinges 23 and a supporting shock absorption cylinder structure 20 are arranged inside the bearing bottom supporting and stabilizing device 13, the fixed connecting hinges 22 are fixed on the inner surface of the bearing bottom supporting and stabilizing device 13, the movable connecting hinges 23 are distributed in the middle of the fixed connecting hinges 22, connecting and coordinating supporting rod members 24 are arranged to connect the fixed connecting hinges 22 and the movable connecting hinges 23 in a diamond shape, the supporting shock absorption cylinder structure 20 is arranged in a diamond structure enclosed by the connecting and coordinating supporting rod members 24, and a, a vertical damping spring structure 18 is arranged between the support connecting plate 14, the base connecting plate 16 and the adjacent movable connecting hinge 23, a horizontal shearing damping spring 17 is arranged between the lateral energy dissipation damping supporting plate 15 and the adjacent movable connecting hinge 23, and a weight increasing bearing reinforcing layer 19 is arranged in the rest cavities in the bearing bottom support stabilizing device 13;
the mixed filling layer 12 is a mixed layer of rubber fiber and concrete, 2.5kg-4.5kg of rubber fiber material is added to each cubic meter of concrete, and the rubber fiber material is processed and manufactured by waste tires.
The left end and the right end of the outer layer support fixed connection top arch frame plate 2 and the inner layer support fixed connection bottom arch frame plate 3 are both fixed with the support connection plate 14.
The outer ring arc-shaped section reinforced connecting partition plate 4, the inner ring arc-shaped section reinforced connecting partition plate 5, the outer layer energy dissipation and shock absorption hose structure 6, the middle layer energy dissipation and shock absorption hose structure 8, the inner layer energy dissipation and shock absorption hose structure 10 and the lateral part energy dissipation and shock absorption support plate 15 are made of low yield point steel plates determined according to design requirements.
The weight-increasing bearing reinforcing layer 19 is prepared by mixing a fine gravel layer and styrene-butadiene latex, and the volume percentage of the styrene-butadiene latex is 20-30%.
The energy dissipation round holes are distributed on the lateral energy dissipation shock absorption support plate 15 at equal intervals, and the specific number and the size of the round holes are determined according to the actual loose and compact degree of the expansive soil tunnel matrix layer 1 structure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides an inflation soil matrix layer tunnel prevents collapsing and strengthens bearing structure, including inflation soil tunnel matrix layer (1), outer support fixed connection top arch frame board (2), inner support fixed connection bottom arch frame board (3), outer lane segmental arc reinforced connection baffle (4), inner circle segmental arc reinforced connection baffle (5), outer power consumption shock attenuation hose structure (6), outer hose embeds cavity (7), middle level power consumption shock attenuation hose structure (8), middle level hose embeds cavity (9), inner power consumption shock attenuation hose structure (10), inner hose embeds cavity (11), mix filling layer (12), bear bottom sprag securing device (13), shrouding (25), advance anchor (27), its characterized in that: the outmost layer of the expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure is an expansive soil tunnel matrix layer (1), an outer support fixedly connected top arch frame plate (2) is arranged above the inner side of the expansive soil tunnel matrix layer (1), an outer ring arc section reinforcing and connecting partition plate (4) is arranged on the inner side of the outer support fixedly connected top arch frame plate (2), an inner ring arc section reinforcing and connecting partition plate (5) is arranged on the inner side of the outer ring arc section reinforcing and connecting partition plate (4), and an inner support fixedly connected bottom arch frame plate (3) is arranged on the inner side of the inner ring arc section reinforcing and connecting partition plate (5); a plurality of outer-layer energy-dissipation damping hose structures (6) and mixed filling layers (12) are arranged between the outer-layer support fixed connection top arch frame plate (2) and the outer-ring arc-shaped section reinforced connection partition plate (4), the inner part of the outer energy dissipation and shock absorption hose structure (6) is provided with an outer hose built-in cavity (7), a plurality of middle-layer energy dissipation and shock absorption hose structures (8) and mixed filling layers (12) are arranged between the outer ring arc-shaped section reinforced connecting partition plate (4) and the inner ring arc-shaped section reinforced connecting partition plate (5), a middle-layer hose built-in cavity (9) is arranged inside the middle-layer energy-dissipation damping hose structure (8), a plurality of inner-layer energy-dissipation damping hose structures (10) and mixed filling layers (12) are arranged between the inner-layer support and the bottom arch frame plate (3) and the inner-ring arc-shaped section reinforced connecting partition plate (5), a built-in cavity (11) of the inner-layer hose is arranged in the inner-layer energy-dissipation damping hose structure (10); the pre-support anchor (27) is formed by connecting a fixing sheet plate (28) and a pre-support anchor rod (29), an agnail (30) is arranged on the pre-support anchor rod (29), one end of the pre-support anchor rod (29) is arranged in the expansive soil tunnel matrix layer (1), the other end of the pre-support anchor rod penetrates through an outer layer support fixed connection top arch frame plate (2) to be fixedly connected with the fixing sheet plate (28) in the mixed filling layer (12), and a sealing plate (25) is arranged to fixedly connect the outer layer support with the front end part and the rear end part of the top arch frame plate (2) and the inner layer support fixed connection bottom arch frame plate (3); a bearing bottom supporting and stabilizing device (13) is arranged below the outer layer supporting and fixedly connecting top arch frame plate (2) and the inner layer supporting and fixedly connecting bottom arch frame plate (3), the bearing bottom supporting and stabilizing device (13) is formed by surrounding a supporting connecting plate (14) at the upper end, lateral energy dissipation and shock absorption supporting plates (15) at the left and right sides, a base connecting plate (16) at the lower end and end vertical plates (26) at the front and rear sides, a plurality of fixed connecting hinges (22), movable connecting hinges (23) and a supporting shock absorption cylinder structure (20) are arranged in the bearing bottom supporting and stabilizing device (13), the fixed connecting hinges (22) are fixed on the inner surface of the bearing bottom supporting and stabilizing device (13), the movable connecting hinges (23) are distributed in the middle of the fixed connecting hinges (22), and connecting coordination supporting rod members (24) are arranged to connect the fixed connecting hinges (22) and the movable connecting hinges (23), the structure is characterized in that a supporting shock-absorbing cylinder structure (20) is arranged in a diamond structure surrounded by connecting and coordinating supporting rod components (24), a built-in silica gel damping layer (21) is arranged inside the supporting shock-absorbing cylinder structure (20), a vertical shock-absorbing spring structure (18) is arranged between a supporting connecting plate (14), a base connecting plate (16) and a movable connecting hinge (23) adjacent to the base connecting plate, a horizontal shearing shock-absorbing spring (17) is arranged between a lateral energy-dissipating shock-absorbing supporting plate (15) and the movable connecting hinge (23) adjacent to the lateral energy-dissipating shock-absorbing supporting plate, and other cavities in the structure of a bearing bottom supporting and stabilizing device (13).
2. The expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure of claim 1, wherein: the mixed filling layer (12) adopts a mixed layer of rubber fiber and concrete, 2.5kg-4.5kg of rubber fiber material is added in each cubic meter of concrete, and the rubber fiber material is processed and prepared by adopting waste tires.
3. The expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure of claim 1, wherein: the left end and the right end of the outer layer support fixed connection top arch frame plate (2) and the inner layer support fixed connection bottom arch frame plate (3) are both fixed with the support connection plate (14).
4. The expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure of claim 1, wherein: the outer ring arc-shaped section reinforced connecting partition plate (4), the inner ring arc-shaped section reinforced connecting partition plate (5), the outer layer energy dissipation and shock absorption hose structure (6), the middle layer energy dissipation and shock absorption hose structure (8), the inner layer energy dissipation and shock absorption hose structure (10) and the lateral part energy dissipation and shock absorption support plate (15) are made of low yield point steel plates determined according to design requirements.
5. The expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure of claim 1, wherein: the weight-increasing bearing reinforcing layer (19) is prepared by mixing a fine gravel layer and styrene-butadiene latex, and the volume percentage of the styrene-butadiene latex is 20-30%.
6. The expansive soil matrix layer tunnel collapse prevention reinforcing and supporting structure of claim 1, wherein: the energy dissipation round holes are distributed on the lateral energy dissipation shock absorption support plate (15) at equal intervals, and the specific number and the size of the round holes are determined according to the actual loose and compact degree of the structure of the expansive soil tunnel matrix layer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723010.3A CN111734438A (en) | 2020-07-24 | 2020-07-24 | Collapse-preventing reinforced support structure for tunnel with expansive soil matrix layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723010.3A CN111734438A (en) | 2020-07-24 | 2020-07-24 | Collapse-preventing reinforced support structure for tunnel with expansive soil matrix layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113565527A (en) * | 2021-09-27 | 2021-10-29 | 中国科学院地质与地球物理研究所 | Tunnel protection structure suitable for activity rupture zone and high ground stress district |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565527A (en) * | 2021-09-27 | 2021-10-29 | 中国科学院地质与地球物理研究所 | Tunnel protection structure suitable for activity rupture zone and high ground stress district |
| CN113565527B (en) * | 2021-09-27 | 2022-01-04 | 中国科学院地质与地球物理研究所 | Tunnel protection structure suitable for activity rupture zone and high ground stress district |
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