CN204609899U - A kind of supporting and protection structure for soft soil layer tunnel - Google Patents
A kind of supporting and protection structure for soft soil layer tunnel Download PDFInfo
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- CN204609899U CN204609899U CN201520311100.6U CN201520311100U CN204609899U CN 204609899 U CN204609899 U CN 204609899U CN 201520311100 U CN201520311100 U CN 201520311100U CN 204609899 U CN204609899 U CN 204609899U
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Abstract
The utility model provides a kind of supporting and protection structure for soft soil layer tunnel, comprise the cover arch, Extended chemotherapy and the steel pipe pile that are positioned at tunnel portal top, described Extended chemotherapy is positioned at tunnel portal both sides, for support set arch, described steel pipe pile is between Extended chemotherapy and ground, for supporting Extended chemotherapy; Described cover arch comprises steel arch-shelf and is arranged circumferentially the pipe canopy of some steel pipe compositions on steel arch-shelf along steel arch-shelf vault, the two ends of described steel arch-shelf are fixedly connected with in a welding manner with the reserved steel bar in Extended chemotherapy respectively, and described pipe canopy is inserted with some advanced tubules.Supporting and protection structure resistance to overturning of the present utility model is strong, support capacity is high, model applied widely, construction sequence are simple, efficiency of construction is high, construction cost is low and safety factor is high, can effectively prevent tunnel portal from caving in and face-upward slope slippage.
Description
Technical field
The utility model relates to constructing tunnel field, especially, relates to a kind of supporting and protection structure used when excavating for tunnel.
Background technology
Along with the development of tunnel construction, in work progress, unavoidably run into the situation carrying out excavating in loose weak stratum, and Portal Section is because buried depth is shallow, unstability easily occurs form accidents such as coming down, cave in, further increases the difficulty of construction.
At present, in tunnel work progress, if run into soft stratum, common way the face-upward slope within the scope of tunnel portal is brushed slope on a large scale and carries out combined bolting and shotcrete, or under certain thickness of earth covering, under ensureing soil stabilization situation, apply cover arch in the mode of kerve, carry out excavating into hole under the supporting of cover arch.And traditional way will certainly make the earth volume of the brush slope strength of face-upward slope or kerve very large, increase quantity of masonry, improve construction cost, and cause vegetation to destroy on a large scale, very large to ambient influnence.
Utility model content
The utility model object is to provide a kind of supporting and protection structure for soft soil layer tunnel, to solve the problems of the technologies described above.
For achieving the above object, the utility model provides a kind of supporting and protection structure for soft soil layer tunnel, comprise the cover arch, Extended chemotherapy and the steel pipe pile that are positioned at tunnel portal top, described Extended chemotherapy is positioned at tunnel portal both sides, for support set arch, described steel pipe pile is between Extended chemotherapy and ground, for supporting Extended chemotherapy; Described cover arch comprises steel arch-shelf and is arranged circumferentially the pipe canopy of some steel pipe compositions on steel arch-shelf along steel arch-shelf vault, the two ends of described steel arch-shelf are fixedly connected with in a welding manner with the reserved steel bar in Extended chemotherapy respectively, and described pipe canopy is inserted with some advanced tubules.
Preferably, described pipe canopy is for being long pipe shed, and its degree of depth is for being not less than 15 meters.
Preferably, the outer limb of described advanced tubule is 15 degree.
Preferably, described adjacent two advanced tubule spacing are for being not more than 3 meters.
Preferably, the length of described advanced tubule is more than 4.5 meters.
Preferably, the central angle of described cover arch vault is 120 degree.
Preferably, the steel arch-shelf that described pipe canopy cover arch is inner is made up of i iron.
The utility model has following beneficial effect: 1, cover arch is fixedly connected with Extended chemotherapy, is supported by Extended chemotherapy, adds the bearing capacity of cover arch, effectively can prevent sinking and the distortion of overlapping arch, ensure the safety of personnel and machinery.2, the bearing capacity of foundation soil that the steel pipe pile being positioned at cover arch two side bottom increases, for superstructure provides enough support forces.3, adopt the long pipe shed contacted with basement rock can avoid the impact of Portal Section face-upward slope disturbance, ensure carrying out smoothly of construction.4, construction sequence is simple, and Be very effective, what be convenient to tunnel excavation enters hole fast.5, resistance to overturning is strong, support capacity is high, model applied widely, construction sequence are simple, efficiency of construction is high, construction cost is low and safety factor is high, can effectively prevent tunnel portal from caving in and face-upward slope slippage.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the front view of the utility model preferred embodiment;
Fig. 2 is the left view of the utility model preferred embodiment;
Wherein, 1, cover arch; 2, Guan Peng; 3, advanced tubule; 4, steel arch-shelf; 5, reserved steel bar; 6, Extended chemotherapy; 7, steel pipe pile.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can limit according to claim and cover is implemented.
See Fig. 1, Fig. 2, a kind of supporting and protection structure for soft soil layer tunnel, comprise be positioned at tunnel portal top cover arch 1, be positioned at tunnel portal both sides, for the Extended chemotherapy 6 of support set arch 1 and between Extended chemotherapy 6 and ground, for supporting the steel pipe pile 7 of Extended chemotherapy 6; Cover arch 1 comprises steel arch-shelf 4 and is arranged circumferentially the pipe canopy 2 of some steel pipe compositions on steel arch-shelf 4 along vault, and the two ends of described steel arch-shelf 4 are fixedly connected with in a welding manner with the reserved steel bar 5 in Extended chemotherapy 6, and pipe canopy 2 is inserted with some advanced tubules 3.Cover arch 1 is supported by Extended chemotherapy 6, adds the bearing capacity of cover arch 1, effectively can prevent sinking and the distortion of overlapping arch 1, ensure the safety of personnel and machinery.Steel pipe pile 7, on ground and between Extended chemotherapy 6, had both added the bearing capacity of ground, also for Extended chemotherapy 6 and cover arch 1 provide enough support forces.Be inserted in the some advanced tubules 3 on pipe canopy 2, reinforcement effect is served to ravelly ground, enhance stability that is loose, weak surrounding rock after slip casting, be conducive to after excavating with complete the stable of country rock in the preliminary bracing time, be unlikely to wall rock destabilization and destroy until cave in.
Wherein, pipe canopy 2 is preferably long pipe shed 2, and long pipe shed 2 can reduce the impact that in work progress, hole face-upward slope disturbance brings, and its degree of depth is preferably more than 15 meters, with the original face-upward slope basement rock of not disturbance for benchmark, contacts original basement rock as far as possible.The length of advanced tubule 3 is preferably more than 4.5 meters, and in addition between limb 15 degree of Inserting Tube canopies 2, the spacing of adjacent two advanced tubules 3 is set to be not more than 3 meters.
The construction method of above-mentioned supporting and protection structure comprises the following steps:
1, steel pipe pile 7 is applied at Extended chemotherapy 6 elevation location;
2, with vault 120 ° of scopes for benchmark, carry out kerve in bottom, both sides according to Extended chemotherapy 6 size, build Extended chemotherapy 6, and reserved steel bar 5;
3, tunneling pipe canopy 2 overlaps the section of arch 1, and frame founds i iron, welds bottom i iron with reserved steel bar 5
4, be inserted between advanced tubule 3 between pipe canopy 2
5, build cover arch 1, make cover encircle 1 and be integrated with Extended chemotherapy 6 one-tenth
The utility model enters hole fast for realizing, solve protection quantity of masonry large, construction cost is high and to problems such as the pollution effect of environment are large, a kind of new supporting and protection structure is proposed, conventional sleeve of comparing arch structure will have stronger resistance to overturning, higher support capacity, the compliance of wider model, and construction sequence is simple, efficiency of construction is high, construction good economy performance and safety high.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. the supporting and protection structure for soft soil layer tunnel, it is characterized in that, comprise the cover arch, Extended chemotherapy and the steel pipe pile that are positioned at tunnel portal top, described Extended chemotherapy is positioned at tunnel portal both sides, for support set arch, described steel pipe pile is between Extended chemotherapy and ground, for supporting Extended chemotherapy;
Described cover arch comprises steel arch-shelf and is arranged circumferentially the pipe canopy of some steel pipe compositions on steel arch-shelf along steel arch-shelf vault, the two ends of described steel arch-shelf are fixedly connected with in a welding manner with the reserved steel bar in Extended chemotherapy respectively, and described pipe canopy is inserted with some advanced tubules.
2. a kind of supporting and protection structure for soft soil layer tunnel according to claim 1, is characterized in that, described pipe canopy is for being long pipe shed, and its degree of depth is for being not less than 15 meters.
3. a kind of supporting and protection structure for soft soil layer tunnel according to claim 1, is characterized in that, the outer limb of described advanced tubule is 15 degree.
4. a kind of supporting and protection structure for soft soil layer tunnel according to claim 1, is characterized in that, described adjacent two advanced tubule spacing are for being not more than 3 meters.
5. a kind of supporting and protection structure for soft soil layer tunnel according to claim 1, is characterized in that, the length of described advanced tubule is for being not less than 4.5 meters.
6. a kind of supporting and protection structure for soft soil layer tunnel according to claim 1, is characterized in that, the central angle of described cover arch vault is 120 degree.
7. a kind of supporting and protection structure for soft soil layer tunnel according to any one of claim 1-6, is characterized in that, the steel arch-shelf of described pipe canopy cover arch inside is made up of i iron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520311100.6U CN204609899U (en) | 2015-05-14 | 2015-05-14 | A kind of supporting and protection structure for soft soil layer tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520311100.6U CN204609899U (en) | 2015-05-14 | 2015-05-14 | A kind of supporting and protection structure for soft soil layer tunnel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191198A (en) * | 2017-04-05 | 2017-09-22 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | The retaining structure and method of a kind of horizontal creep of suppression tunnel light and shade hole intersection slopes |
| CN107505449A (en) * | 2017-09-13 | 2017-12-22 | 武汉科技大学 | A kind of pipe curtain supporting construction model test apparatus |
| CN109441456A (en) * | 2018-12-14 | 2019-03-08 | 中铁二院工程集团有限责任公司 | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata |
| CN110219679A (en) * | 2019-07-22 | 2019-09-10 | 西南交通大学 | A kind of soft stratum tunnel lining structure |
| CN110656959A (en) * | 2019-10-31 | 2020-01-07 | 中铁二十局集团有限公司 | Large-section loess tunnel primary support limit-invasion arch-changing construction method |
| CN111350512A (en) * | 2020-04-16 | 2020-06-30 | 青岛市青排市政工程有限公司 | Transverse hole underground excavation process method |
| CN113417659A (en) * | 2021-06-22 | 2021-09-21 | 中国建筑第二工程局有限公司 | Pile-arch integrated protection structure for shallow-buried bias tunnel portal and construction method |
| CN116220003A (en) * | 2023-03-06 | 2023-06-06 | 中交第二航务工程局有限公司 | Construction method for controlling longitudinal displacement of tunnel portal of poor geology |
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2015
- 2015-05-14 CN CN201520311100.6U patent/CN204609899U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191198A (en) * | 2017-04-05 | 2017-09-22 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | The retaining structure and method of a kind of horizontal creep of suppression tunnel light and shade hole intersection slopes |
| CN107505449A (en) * | 2017-09-13 | 2017-12-22 | 武汉科技大学 | A kind of pipe curtain supporting construction model test apparatus |
| CN109441456A (en) * | 2018-12-14 | 2019-03-08 | 中铁二院工程集团有限责任公司 | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata |
| CN109441456B (en) * | 2018-12-14 | 2024-04-09 | 中铁二院工程集团有限责任公司 | Tunnel entering structure of weak and slippery stratum and construction method thereof |
| CN110219679A (en) * | 2019-07-22 | 2019-09-10 | 西南交通大学 | A kind of soft stratum tunnel lining structure |
| CN110656959A (en) * | 2019-10-31 | 2020-01-07 | 中铁二十局集团有限公司 | Large-section loess tunnel primary support limit-invasion arch-changing construction method |
| CN111350512A (en) * | 2020-04-16 | 2020-06-30 | 青岛市青排市政工程有限公司 | Transverse hole underground excavation process method |
| CN113417659A (en) * | 2021-06-22 | 2021-09-21 | 中国建筑第二工程局有限公司 | Pile-arch integrated protection structure for shallow-buried bias tunnel portal and construction method |
| CN116220003A (en) * | 2023-03-06 | 2023-06-06 | 中交第二航务工程局有限公司 | Construction method for controlling longitudinal displacement of tunnel portal of poor geology |
| CN116220003B (en) * | 2023-03-06 | 2024-06-18 | 中交第二航务工程局有限公司 | Construction method for controlling longitudinal displacement of tunnel portal of poor geology |
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