CN213596825U - Energy dissipation and shock absorption combined shed tunnel structure for resisting landslide collapse body impact - Google Patents
Energy dissipation and shock absorption combined shed tunnel structure for resisting landslide collapse body impact Download PDFInfo
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- CN213596825U CN213596825U CN202021955577.5U CN202021955577U CN213596825U CN 213596825 U CN213596825 U CN 213596825U CN 202021955577 U CN202021955577 U CN 202021955577U CN 213596825 U CN213596825 U CN 213596825U
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Abstract
The utility model discloses an energy dissipation shock attenuation combination shed hole structure that body that landslide resistance collapses was strikeed, including back timber, shed hole board, compound buffer cushion layer and energy dissipation bumper shock absorber, the ground both sides of treating protective area are located to the back timber, the shed hole board supports the shed hole structure that the body that landslide resistance collapses was strikeed at the top of back timber through the energy dissipation bumper shock absorber, compound buffer cushion layer includes foam cushion layer, steel sheet layer and geotechnological check room and adds the muscle soil layer, by laying in proper order on shed hole board top surface from bottom to top. The energy dissipation shock absorber is arranged between the shed tunnel plate and the top beam. The utility model discloses alleviateed the dead weight of shed tunnel structure, improved the landslide resistance of shed tunnel structure and collapsed body impact energy and energy-absorbing shock-absorbing performance, improved the security and the stability of shed tunnel structure. The combined structure is simple and convenient to construct, long in service life and particularly suitable for shed tunnel structure construction of a road section frequently encountered by landslide disasters.
Description
Technical Field
The utility model relates to a side slope protection and calamity control technical field relate to a shed tunnel structure, in particular to energy dissipation shock attenuation combination shed tunnel structure that anti landslide collapses body and assaults.
Background
In the southwest of China, due to the strong rising of the Tibet plateau and the rapid deep cutting of rivers, slopes are high and steep, unloading is strong, and rock mass structures are complex. Under the combined action of natural factors such as rainfall seepage, earthquake disturbance and the like and human factors such as digging a mountain and digging a wall and gargling and excessive cutting, slope instability, rockfall and debris flow disasters are easily caused. Landslide collapse bodies such as rockfall, debris flow and the like pose serious threats to traffic construction and transportation safety in southwest of China. The reinforced concrete shed tunnel is a commonly used protective structure in road traffic engineering, and the shed tunnel utilizes a buffer layer at the top to absorb energy so as to protect the safety of the shed tunnel structure. The traditional shed tunnel buffer cushion layer is a soil layer, and the soil layer can effectively absorb energy and reduce impact force acting on the shed tunnel structure. The increase of the thickness of the soil layer can effectively improve the energy dissipation and shock absorption capacity of the shed tunnel, but simultaneously increases the self weight of the structure, improves the structural design requirement of the shed tunnel, and increases the construction cost. The thinner cushion layer thickness can not effectively absorb impact energy, and is not beneficial to protecting the shed tunnel structure. This conflict limits the use of soil layers as cushioning layers in the field of shed tunnel structure protection. To reduce the dead weight of the shed tunnel, more and more lightweight cushioning materials are used in the design of the cushioning layer. For example, the chinese utility model patent publication No. CN106194212A discloses a shed tunnel roof structure and construction method for resisting the impact of debris flow and falling rocks, which uses a steel wire grating to intercept falling rocks and uses clay and polystyrene foam (EPS) as a buffer layer to absorb energy. However, once the falling energy is large, the steel wire grating and the polystyrene foam (EPS) are easy to generate plastic damage, and the later maintenance cost is high. Therefore, the development of the energy-consuming and shock-absorbing combined shed tunnel structure which has the advantages of strong energy-absorbing and shock-absorbing performance, small structural dead weight, good durability and economic construction has important engineering significance for protecting the road traffic safety in the area with frequent landslide disasters.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's defect, providing an energy consumption shock attenuation combination shed tunnel structure that the body of antiskid landslide collapse was strikeed to alleviate the shed tunnel dead weight, and improve the landslide of shed tunnel and collapse body and strike and energy-absorbing shock attenuation performance.
The utility model aims at realizing through the following technical scheme:
the utility model provides an energy dissipation shock attenuation combination shed tunnel structure that anti landslide collapses body and assaults which characterized in that: including back timber, shed hole board, compound cushion layer and energy dissipation bumper shock absorber, the ground both sides of treating protective area are located to the back timber, the shed hole board supports the shed hole structure that the body that the landslide resistance collapses is formed at the top of back timber through energy dissipation bumper shock absorber, compound cushion layer includes by foam cushion layer, steel sheet layer and the geocell of laying in proper order in shed hole board top surface down and adds the muscle soil layer, the geocell adds the muscle soil layer and comprises geocell packing soil layer, energy dissipation bumper shock absorber includes nested interior steel pipe and outer steel pipe, the steel backing plate has all been welded to the top and the bottom of interior steel pipe and outer steel pipe, forms double-deck metal cylinder tube structure.
As an improvement, a side wall is arranged on one side, away from the mountain body, of the shed hole plate, and a groove-shaped structure used for installing the composite buffer cushion layer is formed between the side wall and the mountain body.
As an improvement, a waterproof layer is arranged on the top of the shed tunnel slab, and the foam cushion layer is laid on the waterproof layer on the top of the shed tunnel slab.
As a refinement, the foam cushion layer is expandable polyethylene foam, and the thickness of the foam cushion layer is less than half of the total thickness of the cushion layer.
As an improvement, the geocell is a geocell with lateral water permeable holes, and the side wall at the top of the shed tunnel plate is provided with corresponding drain holes.
As an improvement, the drain holes are divided into two types and are respectively arranged at the bottom of the geocell layer and the bottom of the foam layer.
Further, be equipped with respectively between steel backing plate about the energy dissipation bumper shock absorber and shed hole board and the back timber and be used for the second grade absorbing rubber packing ring, the rubber packing ring can not only play the second grade cushioning effect, can also increase the static friction between energy dissipation bumper shock absorber and shed hole board, the back timber, reduces the mountain and collapses the lateral displacement who assaults the in-process, can also reduce the rigid contact between energy dissipation bumper shock absorber and shed hole board, the back timber in addition, and effectual protection contact surface is not damaged.
As an improvement, the foam cushion layer is formed by laying one or more layers of foam blocks, and when the layers are multiple, the foam blocks are overlapped in a staggered mode.
As a refinement, the geocell is stretched flat on a steel plate layer and fixed at the ends by pins.
Compared with the prior art, the beneficial effects of the utility model reside in that:
(1) the geocell utilizes the three-dimensional honeycomb structure to limit the lateral displacement of the soil layer, effectively disperses the concentration effect of impact force, and therefore improves the energy absorption and shock absorption effects of the soil layer. Under the same shock resistance design condition, the thickness of the geocell reinforced soil layer is lower than that of the traditional soil layer, and the dead weight of the buffer layer can be effectively reduced. Meanwhile, the geocell with the drainage hole does not influence the drainage of the soil body.
(2) The Expandable Polyethylene (EPE) foam cushion layer is soft, light and flexible, can be bent to absorb and disperse external impact force, and overcomes the defects of frangibility, deformation and poor resilience of common foam plastics. When replacing a part of the thickness of the soil layer of the traditional buffer layer, the structure deadweight can be reduced, the elastic deformation can be utilized to absorb energy, and the buffer effect is good.
(3) The setting of steel sheet layer can protect the foam cushion layer, and the steel sheet layer will concentrate the power dispersion, alleviates the plastic damage of foam cushion layer, improves the life of foam cushion layer.
(4) The double-layer metal cylinder is formed by welding a steel backing plate, a rubber gasket and a steel pipe and is connected with a shed hole plate and a top beam through high-strength expansion bolts. Simple manufacture and convenient field construction. The double-layer metal cylinder absorbs impact energy by means of self-telescoping deformation and improves the impact resistance of the shed tunnel structure under the combined action of the double-layer metal cylinder and the composite buffer cushion layer.
(5) The utility model discloses energy dissipation shock attenuation integrated configuration dead weight is little, the construction is simple and convenient, with low costs, and buffering effect is good.
Drawings
Fig. 1 is the utility model discloses an energy dissipation and shock absorption combined shed tunnel structure schematic diagram of the landslide collapse resistance body impact.
Fig. 2 is a schematic structural view of the energy-consuming damper of the present invention.
Fig. 3 is a schematic view of the local structure of the energy-consuming damper of the present invention.
In the figure: 1-waterproof layer, 2-foam cushion layer, 3-steel plate layer, 4-geocell, 5-soil layer, 6-energy dissipation damper, 7-drainage hole of shed tunnel side wall, 8-inner steel pipe, 9-outer steel pipe and 10-steel backing plate.
Detailed Description
The following detailed description of the energy dissipation and shock absorption combined structure and the construction method of the present invention is made with reference to the accompanying drawings and preferred examples as follows:
as shown in fig. 1 to 3, the top beam is disposed on two sides of the ground (i.e., close to one side of the hill and far away from one side of the hill) of the area to be protected, and the shed tunnel plate is supported on the top of the top beam through the energy dissipation damper to form the shed tunnel structure resisting the impact of the landslide collapse body. The composite cushion layer comprises a foam cushion layer 2, a steel plate layer 3, geocells 4 and a soil layer 5, and the composite cushion layer is sequentially laid on a waterproof layer 1 on the top surface of the shed tunnel plate from bottom to top, wherein the geocells 4 and the soil layer 5 are mixed to form a geocell reinforced soil layer. Energy dissipation bumper shock absorber 6 is a metal double-deck cylinder section of thick bamboo, sets up between canopy hole board and back timber, and energy dissipation bumper shock absorber 6's a specific structure includes nested interior steel pipe 8 and outer steel pipe 9, the top and the bottom of interior steel pipe 8 and outer steel pipe 9 have all welded steel backing plate 10, form double-deck metal cylinder section of thick bamboo structure, during the installation, are equipped with the rubber packing ring that is used for the second grade absorbing between steel backing plate 10 and canopy hole board and back timber respectively, then are connected steel backing plate 10 with canopy hole board and back timber through the expansion bolts that excels in. A foam cushion layer 2 made of expandable polyethylene foam (EPE) is laid on the waterproof layer 1. The steel plate layer 3 is a thin steel plate layer, and the surface of the thin steel plate layer is subjected to rust prevention treatment. The geocell 4 is a geocell with lateral water permeable holes, and the precipitation can be discharged through the water permeable holes of the geocell 4 and the drainage holes 7 of the side wall of the shed tunnel. The side, far away from the mountain body, of each shed hole plate is provided with a side wall, a groove-shaped structure used for installing the composite cushion layer is formed between each side wall and the mountain body, and shed hole side wall drain holes 7 are formed in side walls at the bottom of the geocell reinforced soil layer and the bottom of the foam layer.
The construction method of the energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide collapse body impact is provided.
Collapse of the top of a hillside slope on one side of a road, and on-site investigation: the surface tension cracks in the deformation range are numerous, the front edge collapses in a small scale, the rear edge slips downwards, the substances on the surface of the hillside are loose, and the stability is poor. The upstream side of the deformable ridge collapses on a small scale continuously, and part of stones roll off, so that the passing safety of the road below is seriously threatened.
The first step is as follows: during the construction of the shed tunnel, firstly, a top beam and a shed tunnel plate are prefabricated or cast in situ in a region to be constructed, and a metal double-layer cylindrical energy dissipation damper 6 is arranged between the shed tunnel plate and the top beam. The diameter of the inner shell of the metal double-layer cylinder is 180mm, the diameter of the outer shell is 250mm, the wall thickness is 6mm, and the length is 400 mm. And is connected with the shed slab and the top beam through high-strength expansion bolts.
The second step is that: after the construction of the shed tunnel plate is completed, the top surface of the shed tunnel plate is cleaned, a waterproof layer 1 is made, corresponding positions of a foam cushion layer 2, a steel plate layer 3, a geocell reinforced soil layer and a soil layer 5 are measured and marked according to design requirements, and the total design thickness of the composite buffer layer is 50 cm.
The third step: and laying a single layer of 5 cm-thick expandable polyethylene foam (EPE) on the waterproof layer 1 on the top surface of the shed tunnel to finish the construction of the foam cushion layer 2. The foam cushion layer 2 is laid in a stacking mode, the total thickness of the foam cushion layer is 15cm, and staggered joints among single-layer foam blocks are required to be overlapped.
The fourth step: and paving a thin steel plate layer 3 with the thickness of 3mm on the surface of the paved foam cushion layer 2, and performing rust prevention treatment on the thin steel plate layer 3.
The fifth step: and laying a geocell reinforced soil layer. The geocell 4 with the height of 10cm, the welding torch of 60cm and the wall thickness of 1mm and provided with the water permeable holes is fully stretched, tiled and unfolded on the steel plate layer 3, so that the phenomenon that the welding spot of the geocell 4 is cracked due to stress concentration caused by the uneven plane is avoided. Each geocell 4 at the end part is fixed by a pin, and soil is filled into the space of the geocell gradually until the total designed thickness of the composite buffer layer is 50cm after the space of the geocell is fully filled by soil.
The above description is only for the specific description of the present invention, and not for the limitation of the protection scope of the present invention. Without departing from the technical idea of the present invention, the present invention makes various replacements and changes through the common technical knowledge and the conventional means in the field, and all belong to the protection scope of the present invention.
Claims (9)
1. The utility model provides an energy dissipation shock attenuation combination shed tunnel structure that anti landslide collapses body and assaults which characterized in that: including back timber, shed hole board, compound cushion layer and energy dissipation bumper shock absorber, the ground both sides of treating protective area are located to the back timber, the shed hole board supports the shed hole structure that the body that resists landslide and collapse and assault at the top of back timber through energy dissipation bumper shock absorber, compound cushion layer includes by foam cushion layer, steel sheet layer and the geocell of laying in proper order in shed hole board top surface down and adds muscle soil layer, the geocell adds muscle soil layer and comprises geocell packing soil layer, energy dissipation bumper shock absorber includes nested interior steel pipe and outer steel pipe, the bottom welding of interior steel pipe and outer steel pipe has the steel backing plate, forms double-deck metal cylinder tube structure.
2. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 1, wherein: one side, far away from the mountain body, of the shed hole plate is provided with a side wall, and a groove-shaped structure used for installing the composite buffer cushion layer is formed between the side wall and the mountain body.
3. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 2, wherein: the top of the shed tunnel slab is provided with a waterproof layer, and the foam cushion layer is laid on the waterproof layer at the top of the shed tunnel slab.
4. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 3, wherein: the foam cushion layer is expandable polyethylene foam, and the thickness of the foam cushion layer is less than half of the total thickness of the cushion layer.
5. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 2, wherein: the geocell is provided with lateral permeable holes, and the side wall at the top of the shed tunnel slab is provided with corresponding drain holes.
6. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 5, wherein: the drain holes are divided into two types and are respectively arranged at the bottom of the geocell layer and the bottom of the foam layer.
7. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 5, wherein: rubber gaskets for secondary shock absorption are respectively arranged between the upper steel base plate and the lower steel base plate of the energy dissipation shock absorber and between the shed hole plate and the top beam.
8. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 5, wherein: the foam cushion layer is formed by one or more layers of foam blocks in a laying mode, and when the foam blocks are multiple layers, the foam blocks are in staggered joint and lap joint.
9. The energy-consuming and shock-absorbing combined shed tunnel structure resisting landslide and collapse body impact as claimed in claim 5, wherein: the geocell is stretched and spread flat on the steel plate layer and fixed at the end part by a pin.
Applications Claiming Priority (2)
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| CN202020282947 | 2020-03-10 | ||
| CN2020202829477 | 2020-03-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652980A (en) * | 2021-09-18 | 2021-11-16 | 中国电建集团成都勘测设计研究院有限公司 | Multistage energy consumption buffer system, design method and stone blocking wall structure damage monitoring method |
| CN114753274A (en) * | 2022-04-18 | 2022-07-15 | 重庆交通大学 | Anti avalanche of severe cold tunnel engineering strikes's heat preservation open cut tunnel structure |
| CN115710870A (en) * | 2022-11-03 | 2023-02-24 | 重庆交通大学 | Open cut tunnel capable of preventing debris flow |
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2020
- 2020-09-09 CN CN202021955577.5U patent/CN213596825U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652980A (en) * | 2021-09-18 | 2021-11-16 | 中国电建集团成都勘测设计研究院有限公司 | Multistage energy consumption buffer system, design method and stone blocking wall structure damage monitoring method |
| CN114753274A (en) * | 2022-04-18 | 2022-07-15 | 重庆交通大学 | Anti avalanche of severe cold tunnel engineering strikes's heat preservation open cut tunnel structure |
| CN115710870A (en) * | 2022-11-03 | 2023-02-24 | 重庆交通大学 | Open cut tunnel capable of preventing debris flow |
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