CN107237332A - A kind of foundation pit stope support containing drifting sand layer method of use composite soil-nailed retaining wall - Google Patents
A kind of foundation pit stope support containing drifting sand layer method of use composite soil-nailed retaining wall Download PDFInfo
- Publication number
- CN107237332A CN107237332A CN201710451292.4A CN201710451292A CN107237332A CN 107237332 A CN107237332 A CN 107237332A CN 201710451292 A CN201710451292 A CN 201710451292A CN 107237332 A CN107237332 A CN 107237332A
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- excavation
- foundation pit
- sand layer
- nailed
- drifting sand
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Retaining Walls (AREA)
Abstract
The present invention relates to a kind of method of foundation pit stope support containing drifting sand layer of use composite soil-nailed retaining wall, comprise the following steps：Construction water-stop curtain；Excavation slope is repaired after carrying out stage excavation, excavation to foundation ditch, slope requirement is reached；Injected hole surveying setting-out, mark hole position and Completion of Drilling Hole are carried out along the excavation slope；Locating support is installed, soil nailing reinforcing bar is inserted in injected hole, slurry filling filling perforation is carried out towards using corresponding grouting pressure according to aperture；Reinforced mesh is fixed on the excavation slope after slip casting it is domatic on, gunite concrete formation concrete topping；5~7d of watering maintenance after concrete topping final set 2h；The next layer of earthwork is excavated, repeats above-mentioned to reach designed elevation to foundation ditch.The present invention is able to ensure that excavation slope structure safety, it is to avoid " quicksand " phenomenon occurs for drifting sand layer, it is ensured that good foundation pit construction environment, and the outer groundwater balance of foundation ditch is not destroyed, and design of foundation pit depth is maintained, it is to avoid the sedimentation of foundation ditch nearby buildings.
Description
Technical field
The invention belongs to the technical field of the construction of excavation slope containing drifting sand layer, more particularly to one kind uses composites soil nail
The method of foundation pit stope support containing drifting sand layer of wall.
Background technology
At present, the geological conditions faced in China's foundation pit construction becomes increasingly complex, and contains in the stratum residing for many foundation ditches
Drifting sand layer.Drifting sand layer is mainly made up of saturation Extra-fine sand, and when " quicksand " phenomenon occurs for drifting sand layer, sand particle is constantly from foundation ditch side
Or bottom of foundation ditch is gushed out, execution conditions are caused to deteriorate, foundation ditch is difficult to reach projected depth, excavation slope can be caused to collapse when serious
Side；Nearby Structure is emptied due to ground, is occurred cracking, is sunk, tilts, or even collapses.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of excavation slope containing drifting sand layer of use composite soil-nailed retaining wall
Method for protecting support, it is ensured that excavation slope safety, the groundwater balance not destroyed outside foundation ditch, it is to avoid the sedimentation of foundation ditch nearby buildings.
The technical solution adopted for the present invention to solve the technical problems, which is to provide, to flow a kind of containing for use composite soil-nailed retaining wall
Layer of sand foundation pit stope support method, comprises the following steps：
(1) construction water-stop curtain；
(2) working face is excavated, excavation slope is cleared up：Excavation slope is repaiied after carrying out stage excavation, excavation to foundation ditch
It is whole, reach slope requirement；
(3) cloth hole and pore-forming：Injected hole surveying setting-out, mark hole position and Completion of Drilling Hole are carried out along the excavation slope；
(4) soil nailing reinforcing bar and slip casting are installed：Locating support is installed, soil nailing reinforcing bar is inserted in injected hole, according to aperture court
Slurry filling filling perforation is carried out to using corresponding grouting pressure；
(5) laying reinforced mesh and gunite concrete：Reinforced mesh is fixed on the excavation slope after slip casting it is domatic on,
Gunite concrete formation concrete topping；
(6) concrete curing：5~7d of watering maintenance after concrete topping final set 2h；
(7) the next layer of earthwork is excavated, repeat step (2)~step (6) to foundation ditch reaches designed elevation.
The water-stop curtain integrally closes, is arranged at the outside of foundation ditch in a ring.
Mixed with early strength agent and swelling agent in slurries in the step (4).
Mixed with accelerator in concrete in the step (5).
Beneficial effect
The present invention can be used in carrying out supporting, practical, composites soil nail wall construction to the excavation slope containing drifting sand layer
Ensure excavation slope structure safety, the connection of drifting sand layer and foundation ditch can effectively be separated by the setting of water-stop curtain, it is to avoid stream
" quicksand " phenomenon occurs for layer of sand, advantageously ensures that good foundation pit construction environment, the groundwater balance not destroyed outside foundation ditch so that
The projected depth of foundation ditch is maintained, while avoiding the sedimentation of foundation ditch nearby buildings.
Brief description of the drawings
Fig. 1 is the structural representation of composite soil-nailed retaining wall foundation pit stope support containing drifting sand layer system of the present invention.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
A kind of method of foundation pit stope support containing drifting sand layer of use composite soil-nailed retaining wall as shown in Figure 1, including following step
Suddenly：
(1) water-stop curtain stake is played, the construction of water-stop curtain 1 is carried out, water-stop curtain 1 is overall to be closed in a ring, is arranged at base
The outside in hole；
(2) working face is excavated, excavation slope 2 is cleared up：Excavation slope 2 is carried out after carrying out stage excavation, excavation to foundation ditch
Finishing, reaches slope requirement；
(3) cloth hole and pore-forming：Injected hole surveying setting-out, mark hole position and Completion of Drilling Hole are carried out along the excavation slope 2；
(4) soil nailing reinforcing bar and slip casting are installed：Locating support is installed, soil nailing reinforcing bar 3 is inserted in injected hole, according to aperture court
Carried out to using corresponding grouting pressure in slurry filling filling perforation, slurries mixed with early strength agent and swelling agent；
(5) laying reinforced mesh and gunite concrete：Reinforced mesh 4 is fixed on the domatic of the excavation slope after slip casting 2
On, gunite concrete is formed in concrete topping 5, concrete mixed with accelerator；
(6) concrete curing：5~7d of watering maintenance after the final set 2h of concrete topping 5；
(7) the next layer of earthwork is excavated, repeat step (2)~step (6) to foundation ditch reaches designed elevation.
The present invention can be used in carrying out supporting, practical, composites soil nail wall construction to the excavation slope containing drifting sand layer
Ensure excavation slope structure safety, the connection of drifting sand layer and foundation ditch can effectively be separated by the setting of water-stop curtain, it is to avoid stream
" quicksand " phenomenon occurs for layer of sand, advantageously ensures that good foundation pit construction environment, the groundwater balance not destroyed outside foundation ditch so that
The projected depth of foundation ditch is maintained, while avoiding the sedimentation of foundation ditch nearby buildings.
Claims (4)
1. a kind of method of foundation pit stope support containing drifting sand layer of use composite soil-nailed retaining wall, comprises the following steps：
(1) construction water-stop curtain (1)；
(2) working face is excavated, excavation slope (2) is cleared up：Foundation ditch is carried out to carry out excavation slope (2) after stage excavation, excavation
Finishing, reaches slope requirement；
(3) cloth hole and pore-forming：Injected hole surveying setting-out, mark hole position and Completion of Drilling Hole are carried out along the excavation slope (2)；
(4) soil nailing reinforcing bar and slip casting are installed：Locating support is installed, soil nailing reinforcing bar (3) is inserted in injected hole, according to aperture direction
Slurry filling filling perforation is carried out using corresponding grouting pressure；
(5) laying reinforced mesh and gunite concrete：Reinforced mesh (4) is fixed on the domatic of the excavation slope after slip casting (2)
On, gunite concrete formation concrete topping (5)；
(6) concrete curing：5~7d of watering maintenance after concrete topping (5) final set 2h；
(7) the next layer of earthwork is excavated, repeat step (2)~step (6) to foundation ditch reaches designed elevation.
2. a kind of method of foundation pit stope support containing drifting sand layer of use composite soil-nailed retaining wall according to claim 1, it is special
Levy and be：The water-stop curtain (1) integrally closes, is arranged at the outside of foundation ditch in a ring.
3. a kind of method of foundation pit stope support containing drifting sand layer of use composite soil-nailed retaining wall according to claim 1, it is special
Levy and be：Mixed with early strength agent and swelling agent in slurries in the step (4).
4. a kind of method of foundation pit stope support containing drifting sand layer of use composite soil-nailed retaining wall according to claim 1, it is special
Levy and be：Mixed with accelerator in concrete in the step (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451292.4A CN107237332A (en) | 2017-06-15 | 2017-06-15 | A kind of foundation pit stope support containing drifting sand layer method of use composite soil-nailed retaining wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451292.4A CN107237332A (en) | 2017-06-15 | 2017-06-15 | A kind of foundation pit stope support containing drifting sand layer method of use composite soil-nailed retaining wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107237332A true CN107237332A (en) | 2017-10-10 |
Family
ID=59987769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710451292.4A Pending CN107237332A (en) | 2017-06-15 | 2017-06-15 | A kind of foundation pit stope support containing drifting sand layer method of use composite soil-nailed retaining wall |
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| CN (1) | CN107237332A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166512A (en) * | 2017-12-28 | 2018-06-15 | 中国电建集团成都勘测设计研究院有限公司 | A kind of method for controlling the relaxation of slope excavating Rock Mass Unloading |
| CN111877366A (en) * | 2020-09-04 | 2020-11-03 | 华东交通大学 | Combined type foundation pit supporting structure and construction method thereof |
| CN113089684A (en) * | 2021-04-04 | 2021-07-09 | 泰安市岱宗机电科技开发有限公司 | Side slope support bedding surface device for foundation pit, construction method and application thereof |
| CN113123358A (en) * | 2021-04-30 | 2021-07-16 | 水发规划设计有限公司 | Ship pool deformation prevention structure under coal mining differential settlement effect and construction method |
| CN113322966A (en) * | 2021-06-14 | 2021-08-31 | 泰安市岱宗机电科技开发有限公司 | Side slope support bedding surface device for foundation pit, construction method and application thereof |
| CN114197464A (en) * | 2021-12-30 | 2022-03-18 | 中冶天工集团有限公司 | Unconsolidated formation reinforcing device and construction method thereof |
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| JPH10280410A (en) * | 1997-04-08 | 1998-10-20 | Taisei Corp | Waterproofing method of opened and digged face |
| CN105604065A (en) * | 2015-12-08 | 2016-05-25 | 西南有色昆明勘测设计（院）股份有限公司 | Foundation fit support and peat-soil deep-foundation-pit-support high-pressure jet grouting anchoring method |
| CN205617353U (en) * | 2016-04-13 | 2016-10-05 | 西京学院 | Miniature compound soil nail wall that intercepts water by force |
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2017
- 2017-06-15 CN CN201710451292.4A patent/CN107237332A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10280410A (en) * | 1997-04-08 | 1998-10-20 | Taisei Corp | Waterproofing method of opened and digged face |
| CN105604065A (en) * | 2015-12-08 | 2016-05-25 | 西南有色昆明勘测设计（院）股份有限公司 | Foundation fit support and peat-soil deep-foundation-pit-support high-pressure jet grouting anchoring method |
| CN205617353U (en) * | 2016-04-13 | 2016-10-05 | 西京学院 | Miniature compound soil nail wall that intercepts water by force |
Non-Patent Citations (3)
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| 李杰华: "关于在软弱土层地基基坑围护中复合型土钉墙技术的应用", 《黑龙江科技信息》 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166512A (en) * | 2017-12-28 | 2018-06-15 | 中国电建集团成都勘测设计研究院有限公司 | A kind of method for controlling the relaxation of slope excavating Rock Mass Unloading |
| CN111877366A (en) * | 2020-09-04 | 2020-11-03 | 华东交通大学 | Combined type foundation pit supporting structure and construction method thereof |
| CN113089684A (en) * | 2021-04-04 | 2021-07-09 | 泰安市岱宗机电科技开发有限公司 | Side slope support bedding surface device for foundation pit, construction method and application thereof |
| CN113123358A (en) * | 2021-04-30 | 2021-07-16 | 水发规划设计有限公司 | Ship pool deformation prevention structure under coal mining differential settlement effect and construction method |
| CN113123358B (en) * | 2021-04-30 | 2023-10-31 | 水发规划设计有限公司 | Ship pool deformation prevention and control structure under action of uneven settlement of coal mining and construction method |
| CN113322966A (en) * | 2021-06-14 | 2021-08-31 | 泰安市岱宗机电科技开发有限公司 | Side slope support bedding surface device for foundation pit, construction method and application thereof |
| CN114197464A (en) * | 2021-12-30 | 2022-03-18 | 中冶天工集团有限公司 | Unconsolidated formation reinforcing device and construction method thereof |
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Application publication date: 20171010 |