CN107313430A - The deep big foundation pit subregion construction method of three face Nearby Structures - Google Patents
The deep big foundation pit subregion construction method of three face Nearby Structures Download PDFInfo
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- CN107313430A CN107313430A CN201610267547.7A CN201610267547A CN107313430A CN 107313430 A CN107313430 A CN 107313430A CN 201610267547 A CN201610267547 A CN 201610267547A CN 107313430 A CN107313430 A CN 107313430A
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- foundation ditch
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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
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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
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The present invention is specifically a kind of deep big foundation pit subregion construction method of three face Nearby Structure；By the distance of foundation ditch and Nearby Structure, foundation ditch is divided into the first foundation ditch and the second foundation ditch, the first foundation ditch is more than the second foundation ditch；First foundation ditch is divided into some first small foundation ditches, the second foundation ditch is divided into some second small foundation ditches, the first foundation ditch is excavated, controls and stablize the deformation of the first foundation ditch；Excavate the second foundation ditch；Supporting is carried out to the first small foundation ditch and the second small foundation ditch with excavating, the second small foundation ditch is carried out cheating interior reinforcing；Wall by stages is successively removed with earth excavation；Tentatively support is removed during structure construction；After Underground Construction is finished, temporary supporting wall is removed；First foundation ditch and second are linked to be entirety, the excavation operation of whole foundation ditch is completed.The controllable deep big foundation pit of the present invention excavates produced deformation, effectively reduced " tau-effect " of excavation of foundation pit, it is ensured that deep pit monitor, prevents Nearby Structure run-off the straight, ftractures, collapses.
Description
Technical field
The present invention relates to the deep big foundation pit construction field of Nearby Structure, specifically a kind of deep big foundation pit subregion construction method of three faces Nearby Structure.
Background technology
With the fast development of China's economy, all kinds of construction scale of projects further expand, and city is on the middle and senior level and all kinds of engineerings such as high-rise building, river-spanning bridge, subterranean railway are emerged in multitude, and the deep big foundation pit construction involved by engineering is also more and more.These deep big foundation pits are often under the complicated execution conditions of building dense, populous, underground utilities, and develop to ultra-deep, super large direction.Due to theoretical not perfect enough the, work progress of design of foundation pit exist Unpredictability, formation properties variability it is big and surrounding enviroment intricate, foundation pit collapse caused by excavation of foundation pit, around build（Structure）Build the accidents such as thing damage, road cracking and line burst to occur repeatedly, produce bad social influence.The deep big foundation pit of three face Nearby Structures is in work progress, and the deformation of foundation ditch often causes Nearby Structure to occur excessive deformation, differential settlement, causes Nearby Structure run-off the straight, cracking or even the harm such as collapse, building is caused compared with havoc.Avoided if not adopting an effective measure, the safety of close to buildings will be jeopardized, cause serious economic loss and huge society's negative effect.
The content of the invention
It is an object of the present invention to provide a kind of improve deep pit monitor, greatly reduce the deep big foundation pit subregion construction method that foundation pit construction influences on Nearby Structure.
In order to achieve the above object, the present invention is realized in：
A kind of deep big foundation pit subregion construction method of three face Nearby Structure, including
Step 1：By the distance of foundation ditch and Nearby Structure, foundation ditch is divided into the first foundation ditch and the second foundation ditch of Nearby Structure away from building, wherein, the area of the first foundation ditch is more than the area of the second foundation ditch；
Step 2：The first foundation ditch that will be far from building using wall by stages is divided into some first small foundation ditches, and then by rationalization partition, multiple off-load, reduces large area, for a long time adverse effect of the overall off-load to Nearby Structure；
Step 3：Second foundation ditch of Nearby Structure is divided into some second small foundation ditches, significantly to reduce the foundation pit deformation as caused by long side effect；
Step 4：The first foundation ditch away from building is excavated, the deformation of the first foundation ditch is controlled and stablize；The second foundation ditch of Nearby Structure is excavated again；
Step 5：Supporting is carried out to the first small foundation ditch and the second small foundation ditch with excavating, the second small foundation ditch is carried out cheating interior reinforcing；
Step 6：Wall by stages is successively removed with earth excavation；Tentatively support is removed during structure construction；After Underground Construction is finished, temporary supporting wall is from top to bottom removed；First foundation ditch and second are linked to be entirety, the excavation operation of whole foundation ditch is completed.
The deep big foundation pit subregion construction method of three described face Nearby Structures, the overall width of the second foundation ditch is no more than 20m.
The deep big foundation pit subregion construction method of three described face Nearby Structures, the area of single first small foundation ditch is no more than 10000 ㎡.
The deep big foundation pit subregion construction method of three described face Nearby Structures, of length no more than 50m of single second small foundation ditch.
In the deep big foundation pit subregion construction method of three described face Nearby Structures, step 5, the first road support of the second small foundation ditch is concrete support, and remaining each road support is steel to support.
The mode for taking the full halls of SMW to reinforce is reinforced in the deep big foundation pit subregion construction method of three described face Nearby Structures, the hole of the second small foundation ditch.
Compared with prior art, the advantages of the present invention are：
（1）Can being actually needed according to foundation pit construction, be the big big foundation ditch and the small narrow foundation ditch of area of area by deep big foundation pit Preliminary division, and then be divided into smaller small foundation ditch and short foundation ditch is constructed, to control deep big foundation pit to excavate produced deformation.
（2）Deep big foundation pit is reasonably divided into some independent, relatively small foundation ditches by this construction method, shortens the length of side and area of foundation ditch, can effectively reduce " tau-effect " of excavation of foundation pit, it is ensured that deep pit monitor；
（3）The present invention can greatly reduce influence of the foundation ditch to Nearby Structure, prevent Nearby Structure run-off the straight, ftracture, collapse.
Brief description of the drawings
Fig. 1 is the position relationship schematic diagram of deep big foundation pit and Nearby Structure.
Fig. 2 is the partitioned mode schematic diagram of big foundation ditch and narrow foundation ditch.
Fig. 3 is the partitioned mode schematic diagram of small foundation ditch and short foundation ditch.
In figure：1 building, 2 deep big foundation pits, 3 big foundation ditches, 4 narrow foundation ditches, 5 small foundation ditches, 6 short foundation ditches.
Embodiment
The present invention is further illustrated below by way of specific embodiment.
As shown in Figure 1, Figure 2 and Figure 3, a kind of deep big foundation pit subregion construction method of three face Nearby Structure characterized in that, implement in accordance with the following steps：
Step 1：The whole deep big foundation pit 2 of Nearby Structure 1 is divided into the narrow foundation ditch 4 of the big foundation ditch 3 and Nearby Structure 1 that are relatively distant from building；
Step 2：The big foundation ditch 3 for being relatively distant from building is divided into by some small foundation ditches 5 that area is no more than particular value using wall by stages, by rationalization partition, multiple off-load, to reduce large area, for a long time adverse effect of the overall off-load to Nearby Structure；
Step 3：The narrow foundation ditch of proximate building 1 is divided into some short foundation ditches 6, significantly to reduce the foundation pit deformation as caused by long side effect.
Also include after the step 3：
Step 4：The big foundation ditch 3 for being relatively distant from building 1 is first excavated, the foundation pit deformation of big foundation ditch 3 is controlled and stablize；The narrow foundation ditch 4 of Nearby Structure 1 is excavated again；
Step 5：Supporting is carried out to small foundation ditch 5 and short foundation ditch 6 with excavating, short foundation ditch 6 is carried out to cheat interior reinforcing；
Step 6：Wall by stages is successively removed with earth excavation；Tentatively support is removed during structure construction；After Underground Construction is finished, temporary supporting wall is from top to bottom removed；Big foundation ditch 3 and narrow foundation ditch 4 are linked to be entirety.
The width of narrow foundation ditch 4 is no more than 20m.
The area of small foundation ditch 5 is no more than 10000m2.
Of length no more than 50m of short foundation ditch 6.
Preferably, the first road support of short foundation ditch 6 is concrete support, and remaining each road support is steel to support.
Preferably, the mode for taking the full halls of SMW to reinforce is reinforced in the hole of short foundation ditch 6.
During Specific construction, preferably：
（1）According to the geometry of deep big foundation pit, whole deep big foundation pit is divided into two parts, that is, the big foundation ditch and proximate building width for being relatively distant from building are no more than 20m narrow foundation ditch；
（2）Big foundation ditch is divided into by the small foundation ditch that area is no more than 10000m2 using wall by stages；
（3）Narrow foundation ditch is divided into of length no more than 50m short foundation ditch；
（4）Big foundation ditch is first excavated, after the deformation of big foundation ditch is controlled and keeps stable, then narrow foundation ditch is excavated；
（5）Supporting is carried out to small foundation ditch and short foundation ditch with excavating, short foundation ditch is carried out to cheat interior reinforcing；
（6）With the progress of earth excavation, wall by stages is successively removed；Tentatively support is removed during structure construction；After Underground Construction is finished, temporary supporting wall is from top to bottom removed；Big foundation ditch and narrow foundation ditch are linked to be entirety, the construction of deep big foundation pit is completed.
Claims (6)
1. a kind of deep big foundation pit subregion construction method of three face Nearby Structure, it is characterized in that：Including
Step 1：By the distance of foundation ditch and Nearby Structure, foundation ditch is divided into the first foundation ditch and the second foundation ditch of Nearby Structure away from building, wherein, the area of the first foundation ditch is more than the area of the second foundation ditch；
Step 2：The first foundation ditch that will be far from building using wall by stages is divided into some first small foundation ditches, and then by rationalization partition, multiple off-load, reduces large area, for a long time adverse effect of the overall off-load to Nearby Structure；
Step 3：Second foundation ditch of Nearby Structure is divided into some second small foundation ditches, significantly to reduce the foundation pit deformation as caused by long side effect；
Step 4：The first foundation ditch away from building is excavated, the deformation of the first foundation ditch is controlled and stablize；The second foundation ditch of Nearby Structure is excavated again；
Step 5：Supporting is carried out to the first small foundation ditch and the second small foundation ditch with excavating, the second small foundation ditch is carried out cheating interior reinforcing；
Step 6：Wall by stages is successively removed with earth excavation；Tentatively support is removed during structure construction；After Underground Construction is finished, temporary supporting wall is from top to bottom removed；First foundation ditch and second are linked to be entirety, the excavation operation of whole foundation ditch is completed.
2. the deep big foundation pit subregion construction method of three face according to claim 1 Nearby Structure, it is characterized in that, the overall width of the second foundation ditch is no more than 20m.
3. the deep big foundation pit subregion construction method of three face according to claim 1 Nearby Structure, it is characterized in that, the area of single first small foundation ditch is no more than 10000 ㎡.
4. the deep big foundation pit subregion construction method of three face according to claim 1 Nearby Structure, it is characterized in that, of length no more than 50m of single second small foundation ditch.
5. the deep big foundation pit subregion construction method of three face according to claim 1 Nearby Structure, it is characterized in that, in step 5, the first road support of the second small foundation ditch is concrete support, and remaining each road support is steel to support.
6. the deep big foundation pit subregion construction method of three face according to claim 1 Nearby Structure, it is characterized in that, the mode for taking the full halls of SMW to reinforce is reinforced in the hole of the second small foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610267547.7A CN107313430A (en) | 2016-04-27 | 2016-04-27 | The deep big foundation pit subregion construction method of three face Nearby Structures |
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| CN201610267547.7A CN107313430A (en) | 2016-04-27 | 2016-04-27 | The deep big foundation pit subregion construction method of three face Nearby Structures |
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| CN107313430A true CN107313430A (en) | 2017-11-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042145A (en) * | 2020-01-02 | 2020-04-21 | 中国水利水电第八工程局有限公司 | Construction method for excavating foundation pit near deep-buried large-diameter pipeline |
| CN112982498A (en) * | 2021-01-20 | 2021-06-18 | 广州地铁设计研究院股份有限公司 | Construction method of large foundation pit |
| CN115467335A (en) * | 2022-08-31 | 2022-12-13 | 中建三局第三建设工程有限责任公司 | Construction method for controlling foundation pit deformation by asymmetric earthwork excavation of deep foundation pit near subway |
| CN116815790A (en) * | 2023-08-28 | 2023-09-29 | 上海建工一建集团有限公司 | Foundation pit supporting servo system with two sides adjacent to protection objects and construction method thereof |
Citations (1)
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| CN103510520A (en) * | 2013-10-09 | 2014-01-15 | 上海市建工设计研究院有限公司 | Sectionalized construction method of deep and large foundation pit |
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2016
- 2016-04-27 CN CN201610267547.7A patent/CN107313430A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103510520A (en) * | 2013-10-09 | 2014-01-15 | 上海市建工设计研究院有限公司 | Sectionalized construction method of deep and large foundation pit |
Non-Patent Citations (1)
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| 薛永申等: "复杂环境下软土地质深大基坑分区施工技术", 《上海建设科技》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042145A (en) * | 2020-01-02 | 2020-04-21 | 中国水利水电第八工程局有限公司 | Construction method for excavating foundation pit near deep-buried large-diameter pipeline |
| CN111042145B (en) * | 2020-01-02 | 2022-03-11 | 中国水利水电第八工程局有限公司 | Construction method for excavating foundation pit near deep-buried large-diameter pipeline |
| CN112982498A (en) * | 2021-01-20 | 2021-06-18 | 广州地铁设计研究院股份有限公司 | Construction method of large foundation pit |
| CN115467335A (en) * | 2022-08-31 | 2022-12-13 | 中建三局第三建设工程有限责任公司 | Construction method for controlling foundation pit deformation by asymmetric earthwork excavation of deep foundation pit near subway |
| CN115467335B (en) * | 2022-08-31 | 2023-09-15 | 中建三局第三建设工程有限责任公司 | Construction method for controlling foundation pit deformation by asymmetric earth excavation of subway-facing deep foundation pit |
| CN116815790A (en) * | 2023-08-28 | 2023-09-29 | 上海建工一建集团有限公司 | Foundation pit supporting servo system with two sides adjacent to protection objects and construction method thereof |
| CN116815790B (en) * | 2023-08-28 | 2023-11-17 | 上海建工一建集团有限公司 | Construction method of foundation pit supporting servo system with two sides adjacent to protection object |
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Application publication date: 20171103 |
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