CN202324013U - Fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure - Google Patents
Fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure Download PDFInfo
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- CN202324013U CN202324013U CN2011204685550U CN201120468555U CN202324013U CN 202324013 U CN202324013 U CN 202324013U CN 2011204685550 U CN2011204685550 U CN 2011204685550U CN 201120468555 U CN201120468555 U CN 201120468555U CN 202324013 U CN202324013 U CN 202324013U
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Abstract
The utility model relates to a fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure, which belongs to the field of tunnel engineering and geological disaster prevention and cure engineering. The fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure sequentially comprises a waterproof layer, an impact resistance pad layer, a clay water separation layer and a planting soil layer from bottom to top, wherein the waterproof layer is adjacent to an arch ring layer arranged on the tunnel top of a cut tunnel or a shed tunnel, the impact resistance pad layer is formed by paving soil filling layers and impact resistance plates at intervals, the number of the impact resistance plates is at least one layer, and the soil filling layers are respectively arranged at the upper surface and the lower surface of the impact resistance pad layer. The impact resistance plates are general polystyrene geotechnical foam plates. The polystyrene geotechnical foam plates (impact resistance plates) are additionally arranged in the soil filing layers, and the buffer, deformation and energy consumption effects of the materials under the impact effect are sufficiently utilized, so the impact duration is greatly prolonged, i.e. the impact force can be effectively reduced, and the safety of the cut tunnel and shed tunnel structure under the fallen stone impact load effect is ensured.
Description
Technical field
The utility model relates to a kind of anti-falling rocks and impacts open cut tunnel, top, hangar tunnel hole cushion layer structure, belongs to construction of tunnel, hazards control engineering field.
Background technology
Open cut tunnel is imported and exported in the tunnel both at home and abroad at present, mostly the hangar tunnel top is the plain fill bed course; All recommend to adopt the soil padding that is not less than more than the 1.5m to impact like highway in China, railway systems standard with the opposing falling rocks; Effect is not good enough in the actual engineering, and the case that the west area open cut tunnel is ruined by falling rocks all has several generations every year.From the purpose that the opposing falling rocks impacts, add reinforcement materials such as GSZ when also having some tunnels to attempt at the top backfill, but because falling rocks impacts is a kind of short-time pulse behavior, it is limited only to improve the impact resistance effect of bed course through reinforcement.
Summary of the invention
The purpose of the utility model is to provide a kind of anti-falling rocks to impact open cut tunnel, top, hangar tunnel hole cushion layer structure, has solved existing open cut tunnel, hangar tunnel hole very useful plain fill bed course impact resistance is not good, can't resist the technical problem that falling rocks impacts.
The utility model solves the technical scheme that its technical problem adopted:
A kind of anti-falling rocks impacts open cut tunnel, top, hangar tunnel hole cushion layer structure; It comprises waterproofing course, shock resistance bed course, clay water barrier and plantation soil layer from bottom to top successively; The ring course on waterproofing course and open cut tunnel or top, hangar tunnel hole is adjacent; The shock resistance bed course is to be laid at interval by back fill course and shock resistance sheet material to form, and shock resistance sheet material is provided with one deck at least, and the upper and lower surfaces of shock resistance bed course is back fill course.Shock resistance sheet material is general polystyrene geotechnique cystosepiment.
The utility model is set up polystyrene geotechnique cystosepiment (shock resistance sheet material) in back fill course; Make full use of buffering, distortion, the energy dissipating effect of this kind material under percussion, last, that is to say and effectively to reduce impact force thereby prolong greatly to impact; Thereby open cut tunnel, the safety of hangar tunnel structure under the effect of falling rocks impact load have been guaranteed; Reduce cushion thickness, reduce the bed course deadweight, thereby bring good economy, environmental protection, mitigation benefit.
As preferably, waterproofing course is made up of splash guard and geotextiles.Further preferably, the ring course on described geotextiles and open cut tunnel or hangar tunnel hole top is fixing through the bitumen layer bonding.
As preferably, back fill course thickness is 25 ~ 30cm.
As preferably, the clay impermeable layer thickness is 8 ~ 10cm.
As preferably, shock resistance sheet material is 2 ~ 3 layers, and sheet metal thickness is 10cm ~ 15cm.
The sequence of construction of the utility model is that open cut tunnel, hangar tunnel Dong Ding top are handled in advance, does waterproofing course, laminin soil (back fill course), one deck anti-ballistic materials construction in layer then, and the plantation soil layer of the superiors adopts plain soil, to satisfy the greening requirement.The plain fill layer requires to reach certain compactness, and the laying scope of shock resistance sheet material covers the scope that whole vault, haunch etc. are impacted by falling rocks maybe.
Ethene vinyl acetate modified bitumen blend (ECB) splash guard is a kind of synthetic resin macromolecule splash guard; Be to be primary raw material with the ethylene vinyl acetate copolymer; Add a certain amount of modified bitumen blend; Extrude three roll-ins through two sections and prolong the geotechnological waterproof, seepage control material of a kind of top grade that operations such as cooling off bundling is processed, the ECB splash guard is an existing product, can buy.
The key technology of the utility model is for adding several layers anti-ballistic materials in tunnel open cut tunnel, hangar tunnel top back fill course; Form the structure that is similar to " sandwich " that a kind of backfill and anti-ballistic materials are formed; Be applicable to that avalanche falling rocks disaster threatens the tunnel in area to import and export engineering; Application site is that tunnel is imported and exported open cut tunnel, the cushion of hangar tunnel structural top.
The beneficial effect of the utility model is: compared with prior art, the deadweight of moulding back pad layer reduces 20% ~ 40% than stack pile plain fill bed course, and the stand under load space has been reserved in the opposing falling rocks impact that is reduced to of bed course deadweight.The anti-ballistic materials of setting up is a kind of porous, elastic-plastic medium, under the impact load effect, can pass through elasticity, plastic strain absorption impact kinetic energy, prolongs lasting of whole impact process, can improve the bed course impact resistance more than 2 times.This material is batch production production, tailor-made sheet material, can fill in the process in soil layer and directly lay; Transportation, laying need not heavy mechanical equipment, and condition of equivalent thickness backfill bed course is compared, owing to need not to roll, tamp, the duration also slightly shortens.Although set up padded coaming, consider that volume of earthwork and impact resistance strengthen the saving of the open cut tunnel Structural Engineering amount that causes, comprehensive cost can reduce by 5% ~ 15%.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure: 1, ring course, 2, waterproofing course, 3, back fill course, 4, shock resistance sheet material, 5, the clay water barrier, 6, the plantation soil layer.
The specific embodiment
Below through specific embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Embodiment:
A kind of anti-falling rocks as shown in Figure 1 impacts open cut tunnel, top, hangar tunnel hole cushion layer structure; It comprises waterproofing course 2, shock resistance bed course, clay water barrier 5 and plantation soil layer 6 from bottom to top successively; Waterproofing course 2 is adjacent with the ring course 1 on open cut tunnel or top, hangar tunnel hole; The shock resistance bed course is to be laid at interval with shock resistance sheet material 4 by back fill course 3 to form, and the upper and lower surfaces of shock resistance bed course is back fill course.Waterproofing course 2 is made up of splash guard and geotextiles, and the ring course on described geotextiles and open cut tunnel or top, hangar tunnel hole is fixing through the bitumen layer bonding.Shock resistance sheet material in the present embodiment is 2 layers, and sheet metal thickness is 15cm.
During construction, the back fill course THICKNESS CONTROL is in 25 ~ 30cm scope, and is more suitable smaller or equal to 30cm.The clay impermeable layer thickness is 8 ~ 10cm.Impacting the laying number of plies of sheet material in the shock resistance bed course is confirmed with the impact resistance needs.Back fill course adopts plain soil with the plantation soil layer.The clay water barrier promptly adopts clay as the making raw material, forms one deck water barrier.
Adopt the cushion layer structure of the utility model; The existence of shock resistance sheet material can effectively absorb the kinetic energy in the falling rocks impact process; Increase to impact and to last more than 2 times, act on impact force bright, the hangar tunnel structural top and sharply reduce thereby make, and then improve the anti-falling rocks impact capacity of structure.Dead load after the moulding reduces 20 ~ 40% than the plain fill bed course of stack pile, and reducing of dead load reserved more bearing load space for the opposing falling rocks impacts.More than the effect of two aspects can improve the anti-falling rocks impact capacity of cushion layer structure more than 2 times.
Above-described embodiment is a kind of preferable scheme of the utility model, is not the utility model is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (6)
1. an anti-falling rocks impacts open cut tunnel, top, hangar tunnel hole cushion layer structure; It is characterized in that: it comprises waterproofing course (2), shock resistance bed course, clay water barrier (5) and plantation soil layer (6) from bottom to top successively; The ring course (1) on waterproofing course and open cut tunnel or top, hangar tunnel hole is adjacent; The shock resistance bed course is to be laid at interval by back fill course (3) and shock resistance sheet material (4) to form, and shock resistance sheet material is provided with one deck at least, and the upper and lower surfaces of shock resistance bed course is back fill course.
2. anti-falling rocks according to claim 1 impacts open cut tunnel, top, hangar tunnel hole cushion layer structure, and it is characterized in that: waterproofing course is made up of splash guard and geotextiles.
3. anti-falling rocks according to claim 2 impacts open cut tunnel, top, hangar tunnel hole cushion layer structure, it is characterized in that: the ring course on described geotextiles and open cut tunnel or top, hangar tunnel hole is fixing through the bitumen layer bonding.
4. impact open cut tunnel, top, hangar tunnel hole cushion layer structure according to claim 1 or 2 or 3 described anti-falling rocks, it is characterized in that: back fill course thickness is 25 ~ 30cm.
5. impact open cut tunnel, top, hangar tunnel hole cushion layer structure according to claim 1 or 2 or 3 described anti-falling rocks, it is characterized in that: the clay impermeable layer thickness is 8 ~ 10cm.
6. impact open cut tunnel, top, hangar tunnel hole cushion layer structure according to claim 1 or 2 or 3 described anti-falling rocks, it is characterized in that: shock resistance sheet material is 2 ~ 3 layers, and sheet metal thickness is 10cm ~ 15cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204685550U CN202324013U (en) | 2011-11-23 | 2011-11-23 | Fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204685550U CN202324013U (en) | 2011-11-23 | 2011-11-23 | Fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure |
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| Publication Number | Publication Date |
|---|---|
| CN202324013U true CN202324013U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204685550U Expired - Fee Related CN202324013U (en) | 2011-11-23 | 2011-11-23 | Fallen stone impact resistance open cut tunnel and shed tunnel top pad layer structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677703A (en) * | 2011-11-23 | 2012-09-19 | 浙江大地交通工程有限公司 | Falling-rock-impact-resistant open cut tunnel/shed tunnel ceiling cushion layer structure and construction method thereof |
| CN106194213A (en) * | 2016-08-29 | 2016-12-07 | 长江勘测规划设计研究有限责任公司 | A kind of shed hole structure crossing over debris flow gully and construction method |
| CN106194212A (en) * | 2016-08-29 | 2016-12-07 | 长江勘测规划设计研究有限责任公司 | A kind of anti-mud-rock flow and the shed tunnel top structure of rock-fall impact and construction method |
-
2011
- 2011-11-23 CN CN2011204685550U patent/CN202324013U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677703A (en) * | 2011-11-23 | 2012-09-19 | 浙江大地交通工程有限公司 | Falling-rock-impact-resistant open cut tunnel/shed tunnel ceiling cushion layer structure and construction method thereof |
| CN102677703B (en) * | 2011-11-23 | 2014-07-02 | 浙江大地交通工程有限公司 | Falling-rock-impact-resistant open cut tunnel/shed tunnel ceiling cushion layer structure and construction method thereof |
| CN106194213A (en) * | 2016-08-29 | 2016-12-07 | 长江勘测规划设计研究有限责任公司 | A kind of shed hole structure crossing over debris flow gully and construction method |
| CN106194212A (en) * | 2016-08-29 | 2016-12-07 | 长江勘测规划设计研究有限责任公司 | A kind of anti-mud-rock flow and the shed tunnel top structure of rock-fall impact and construction method |
| CN106194212B (en) * | 2016-08-29 | 2018-07-03 | 长江勘测规划设计研究有限责任公司 | The shed tunnel top structure and construction method of a kind of anti-mud-rock flow and rock-fall impact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20161123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |