CN108286254A - Neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction structure - Google Patents
Neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction structure Download PDFInfo
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- CN108286254A CN108286254A CN201710054782.0A CN201710054782A CN108286254A CN 108286254 A CN108286254 A CN 108286254A CN 201710054782 A CN201710054782 A CN 201710054782A CN 108286254 A CN108286254 A CN 108286254A
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- foundation pit
- important feature
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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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- 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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to construction engineering technical fields, are a kind of structures and construction method of neighbouring important feature strip foundation pit remaining soils separation subregion excavation construction, and the structure includes：Neighbouring important feature and strip foundation pit, neighbouring important feature side are independently arranged pitting, vertically adjacent foundation pit remaining soils and sloping timbering, and the excavation for independent point of hole provides horizontal reacting force, other regions are constructed simultaneously with independent pitting.The present invention independently divides hole to conventional neighbouring important feature strip deep big foundation pit, and excavation construction method is innovated successively, under the premise of ensureing neighbouring foundation pit important feature safety, realize that other regions are constructed simultaneously in addition to reserved native range, to reduce construction deployment difficulty, the overall duration is effectively shortened.
Description
Technical field
The present invention relates to architecture Foundation Pit Engineering technical fields, and it is pre- to be specifically related to a kind of neighbouring important feature strip foundation pit
The soil body is stayed to separate subregion excavation construction structure and construction method.
Background technology
In recent years, China's real estate flourishes, all kinds of buildings are such as emerged rapidly in large numbersBamboo shoots after a spring rain, and urban built-up land is more tight
.In order to make full use of space, alleviation urban land is insufficient, and modern city uses the strategy developed to high-altitude and underground,
High level, high-rise building are more and more, and large deep foundation pit technology is also used more and more.
With the development and change of city layout and overall planning, down space integration on a large scale is carried out close to important feature
Exploitation forms multiple functions and hands over the engineering for mixing synthesis more and more.In order to ensure the safety of neighbouring important feature, adjacent depth base
The procedure arrangement that hole engineering generally use point hole subregion is constructed successively.There are speed of applications for this procedure arrangement slowly, the overall duration
Long, construction cost height, the various problems such as construction deployment difficulty.
Such as each big city is all under construction or prepares the subway built.To a large amount of involved in the construction process of city underground
Deep-foundation pit engineering, and often just occur the phase of deep foundation pit construction and Adjacent Buildings unavoidably in the intensive building area
Mutually influence problem.For this kind of adjacent foundation pits construction problem, a large amount of scholars have realized that previous base pit engineering intensity is set
Meter theory cannot meet the security requirement of engineering ambient enviroment, and the base pit engineering Deformation control being increasingly stringenter requires fortune
Among using Practical Project, but still there are many more need the problem solved to adjacent foundation pits construction problem.
Invention content
In order to overcome, neighbouring important feature carries out deep big foundation pit point hole, subregion constructs applied existing for normal process steps arrangement successively
Work speed is slow, totality is long in time limit, construction cost is high, the various problems such as construction deployment difficulty, and the present invention provides a kind of neighbouring weights
Structure strip foundation pit remaining soils are wanted to separate subregion excavation construction structure, the present invention also provides the construction parties of the structure
Method.
The technical scheme is that：A kind of neighbouring important feature strip foundation pit remaining soils separation subregion excavation construction
Structure includes mainly strip foundation pit and important feature；
The important feature is to have existed, normal operation, is located at quasi- excavation strip foundation pit short side, needs in base
The structure laid special stress on protecting in the digging process of hole；
The strip foundation pit is the foundation pit of foundation pit long side and bond length ratio more than 3, and short side direction is close to important knot
Structure can be divided into independent small point of hole, remaining soils area and other subregion three regions；
Small point of the independence is cheated as strip foundation pit close to important feature side, is independently divided using building enclosure, it is desirable that is protected
Demonstrate,prove the small-scale pit for the excavation construction that takes the lead in；
The remaining soils area is 1~2 times of excavation of foundation pit depth of top of the slope width in independent small point of hole Adjacent Pit indwelling,
For the earthen platform of simple remaining soils sloping timbering, it is therefore an objective to be excavated for independent small point of hole and provide horizontally-supported counter-force；
Other described subregions are to be separated by remaining soils, the region far from important feature and independent small point of hole, also can basis
Surrounding enviroment and foundation pit length-width ratio condition are constructed using this structure organization；
It is cheated in setting hole in other described subregions, hole is less than positioned at other subregion centre positions and area in the hole
The dell of other subregions, is mainly made of fender post and bottom plate；
Around the strip foundation pit be foundation pit enclosure structure, the foundation pit enclosure structure include foundation pit enclosure diaphragm wall and
Foundation pit enclosure stake is equipped with anchor pole one in described include in foundation pit enclosure diaphragm wall.
Further, in the above scheme, the remaining soils sloping timbering be using such as soil nail wall sloping timbering compared with
Economic support form can ensure the support pattern of reserved native slope stability.
The present invention also provides the method that neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction, steps
It is rapid as follows：
The first step：Place flattens, and completes the construction of strip foundation pit subregion and divides, and neighbouring important feature setting is small point independent
The one fixed width soil body is reserved in hole, adjacent sectors, is separated by a point hole stake with independent small point of hole, remaining area is other subregions；
Second step：Foundation pit enclosure structure construction is completed on ground；
Third walks：In addition to remaining soils area, other all subregions while excavation construction are preferential to ensure adjacent to important feature
Independent small point of hole construction speed；
4th step：After regional body structure goes out ± 0.00 after independent small point of hole, remaining soils area is excavated, while from reserved soil
In body area anchor pole two is implanted into neighbouring important feature；
5th step：It constructs to substrate, from bottom to top when construction agent structure, according to numerical simulation and monitoring in remaining soils area
Data results can suitably cancel horizontal support replacement between structure and point hole stake；
6th step：After dividing hole stake structure on two sides to complete ± 0.00 or less structure construction, removes to divide from top to bottom and cheat a stake；
7th step：If the cancellation of the 5th step structure support replacement performs, then divide hole stake that can be disposably removed from top to bottom to substrate；
8th step：Such as divide hole stake disposably to be removed from top to bottom to substrate, then post-cast strip can be closed successively from bottom to top, point
It is whole to cheat the connection of stake structure on two sides.
Further, it is embedded to the angle steel of a length of 500mm in advance at post-cast strip position, post-cast strip is embedded to angle steel in advance, can be with
Ensure the safety of agent structure.
The beneficial effects of the invention are as follows：
(1) multiple points of holes excavation construction method successively is compared, remaining soils separate subregion excavation construction method, can be effective
The security risk of control neighbouring important feature and Adjacent Pit itself, and may insure that neighbouring important feature point hole takes the lead in completing；
(2) multiple points of holes are solved and excavate the work holdup of the labour and machinery brought successively or repeatedly into constructions portions such as appearances
Administration's problem, and it is effectively saved construction cost；
(3) remaining soils separate subregion construction, realize that all subregions are constructed simultaneously, can effectively be contracted in addition to reserved native region
Casual labourer's journey overall duration.
Description of the drawings
Fig. 1 is that patent of the present invention separates subregion excavation construction region division adjacent to important feature strip foundation pit remaining soils
The plan view of structural schematic diagram；
Fig. 2 is that patent of the present invention separates subregion excavation construction region division adjacent to important feature strip foundation pit remaining soils
The front view of structural schematic diagram；
Fig. 3 is point hole horizontal support replacement schematic diagram of stake structure on two sides；
Fig. 4 is that schematic diagram is disposably removed in a point hole stake from top to bottom；
Fig. 5 is point hole stake range structure post-cast strip closure construction schematic diagram from bottom to top；
Wherein, 1-important feature；2-independent small point of holes；3-remaining soils areas；4-other subregions；5-points of hole stakes；
6-structure support replacements；7-bottom plate support replacements；8-foundation pit enclosure stakes；9-post-cast strips；10-agent structures, 11-foundation pit enclosures are continuous
Wall, 12-anchor poles one, 13-anchor poles two, 14-hole in cheat.
Specific implementation mode
If attached drawing 1, neighbouring important feature strip foundation pit remaining soils shown in Fig. 2 separate subregion excavation construction structure,
Include mainly strip foundation pit and important feature；Important feature 1 is to have existed, normal operation, is located at quasi- excavation strip
Foundation pit short side needs the structure laid special stress on protecting in Excavation Process；Strip foundation pit is foundation pit long side and bond length
Ratio is more than 3 foundation pit, and short side direction can be divided into independent small point of hole 2, remaining soils area 3 and other points close to important feature 1
4 three regions of area；Independent small point of hole 2 is strip foundation pit close to 1 side of important feature, is independently divided using building enclosure, it is desirable that
Ensure the small-scale pit of excavation construction of taking the lead in；Remaining soils area 3 is the top of the slope width 1 in independent small point of 2 Adjacent Pit indwellings of hole
~2 times of excavation of foundation pit depth are the earthen platform of simple remaining soils sloping timbering, it is therefore an objective to be excavated for independent small point of hole and provide level
Reaction of bearing, remaining soils sloping timbering are that can ensure to reserve using such as more economical support form of soil nail wall sloping timbering
The support pattern of native slope stability；Other subregions 4 are to be separated by remaining soils, the area far from important feature 1 and independent small point of hole 2
Domain；Cheat 15 in other subregions 4 in setting hole, hole 15 is positioned at other 4 centre positions of subregion in hole and area is less than other points
The dell in area 4, is mainly made of fender post and bottom plate；It is foundation pit enclosure structure, foundation pit enclosure structure packet around strip foundation pit
Foundation pit enclosure diaphragm wall 11 and foundation pit enclosure stake 8 are included, anchor pole 1 is equipped in foundation pit enclosure diaphragm wall in described include.
Below by taking the underground space engineering North of Suzhou as an example, in conjunction with attached drawing, invention is further explained.
About 2.44 ten thousand square metres of the Suzhou underground space engineering North foundation pit gross area, is rectangle, north and south is up to approximately
301m, the wide place of thing are 84m, and narrow place is 64m, foundation pit Zhou Changyue 792m.Absolute altitude 2.70m after the leveling of place.Foundation pit is dug deeply about
17.8m.Foundation pit 84m short side directions are close to subway station, away from station structure outer edge about 32m.
Two independent foundation pits are divided in North, are big foundation pit far from subway side, using+three road coagulation of 800mm thickness diaphram wall
Native inner support, neighbouring subway side are small foundation pit, using (one of the concrete support+three of+four road inner support of 800mm thickness diaphram wall
Road bracing members), two hole between useHole stake is divided to separate.
For protection subway line and station normal operation, it is desirable that take the lead in completing, close to subway pitting region, constructing again later
Adjacent hollow place region.Construction method using the present invention is determined through studying repeatedly.
Implementation steps are as follows：
The first step：Place flattens, and completes the construction of strip foundation pit subregion and divides.Neighbouring 1 side of important feature (subway) is only
Vertical point of hole 2, adjacent hollow place are separated by a point hole stake 5 close to pitting side indwelling one fixed width remaining soils area 3, with independent point of hole 2, are remained
Remaining region is other subregions 4；
Second step：Foundation pit enclosure structure 8 is completed on ground to construct；
Third walks：In addition to remaining soils area 3, other all subregions 2 and 4 excavation construction, preferential guarantees simultaneously are neighbouring important
(subway) structure side independently divides the construction speed in hole 2；
4th step：After independently a point 2 regional body structures 10 of hole go out ± 0.00, remaining soils area 3 is excavated, while from reserved
In soil body area 3 anchor pole 2 13 is implanted into neighbouring important feature 1；
5th step：3 subregion of remaining soils area is constructed to substrate, from bottom to top when construction agent structure 10, according to Numerical-Mode
Quasi- and Analysis on monitoring data is as a result, can suitably cancel horizontal structure support replacement 6 between agent structure 10 and point hole stake 5, such as Fig. 3 institutes
Show；
6th step：After dividing hole 5 both sides agent structure 10 of stake to complete ± 0.00 or less construction, removes divide a hole stake 5 from top to bottom；
7th step：If the cancellation of the 5th step structure support replacement 6 performs, then divide hole stake 5 that can be disposably removed from top to bottom to substrate,
As shown in Figure 4；
8th step：Such as divide hole stake 5 disposable dismounting from top to bottom to substrate, then post-cast strip 9 that can close successively from bottom to top,
Hole stake both sides agent structure 10 is divided to be connected to be whole, as shown in Figure 5.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited in upper
The specific implementation mode stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (3)
1. a kind of neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction structure, which is characterized in that main
Including strip foundation pit and important feature；
The important feature is to have existed, normal operation, is located at quasi- excavation strip foundation pit short side, needs to open in foundation pit
Dig the structure laid special stress on protecting in the process；
The strip foundation pit is the foundation pit that foundation pit long side and bond length ratio are more than 3, and short side direction, can close to important feature
It is divided into independent small point of hole, remaining soils area and other subregion three regions；
Small point of the independence is cheated as strip foundation pit close to important feature side, is independently divided using building enclosure, it is desirable that fraction
The small-scale pit of first excavation construction；
The remaining soils area is 1~2 times of excavation of foundation pit depth of top of the slope width in independent small point of hole Adjacent Pit indwelling, for letter
The earthen platform of easy remaining soils sloping timbering；
Other described subregions are to be separated by remaining soils, the region far from important feature and independent small point of hole；
Other described subregions are cheated in interior setting hole, and hole is positioned at other subregion centre positions in the hole and area is less than other
The dell of subregion, is mainly made of fender post and bottom plate；
It is foundation pit enclosure structure around the strip foundation pit, the foundation pit enclosure structure includes foundation pit enclosure diaphragm wall and foundation pit
Fender post.
2. a kind of neighbouring important feature strip foundation pit remaining soils according to claim 1 separate subregion excavation construction knot
Structure, which is characterized in that the remaining soils sloping timbering is using the more economical support form energy of such as soil nail wall sloping timbering
Enough support patterns for ensureing reserved native slope stability.
It is applied 3. a kind of neighbouring important feature strip foundation pit remaining soils according to claim 1 or 2 separate subregion excavation
The construction method of work structure, which is characterized in that implementation steps are as follows：
The first step：Place flattens, and completes the construction of strip foundation pit subregion and divides, the neighbouring independent small point of hole of important feature setting, phase
Adjacent subregion reserves the one fixed width soil body, is separated by a point hole stake with independent small point of hole, remaining area is other subregions；
Second step：Foundation pit enclosure structure construction is completed on ground；
Third walks：In addition to remaining soils area, other all subregions while excavation construction, the preferential independence for ensureing neighbouring important feature
Small point of hole construction speed；
4th step：After regional body structure goes out ± 0.00 after independent small point of hole, remaining soils area is excavated, while from remaining soils area
Introversive neighbouring important feature is implanted into anchor pole two；
5th step：It constructs to substrate, from bottom to top when construction agent structure, according to numerical simulation and monitoring data in remaining soils area
Analysis result can suitably cancel horizontal support replacement between structure and point hole stake；
6th step：After dividing hole stake structure on two sides to complete ± 0.00 or less structure construction, removes to divide from top to bottom and cheat a stake；
7th step：If the cancellation of the 5th step structure support replacement performs, then divide hole stake that can be disposably removed from top to bottom to substrate；
8th step：Hole stake is such as divided disposably to be removed from top to bottom to substrate, then post-cast strip can be closed successively from bottom to top, point hole stake
Structure on two sides connection is whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054782.0A CN108286254A (en) | 2017-01-24 | 2017-01-24 | Neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054782.0A CN108286254A (en) | 2017-01-24 | 2017-01-24 | Neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction structure |
Publications (1)
| Publication Number | Publication Date |
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| CN108286254A true CN108286254A (en) | 2018-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710054782.0A Pending CN108286254A (en) | 2017-01-24 | 2017-01-24 | Neighbouring important feature strip foundation pit remaining soils separate subregion excavation construction structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487798A (en) * | 2018-12-29 | 2019-03-19 | 中交（广州）建设有限公司 | Station asymmetry excavation supporting structure and construction technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103590406A (en) * | 2013-11-29 | 2014-02-19 | 中船第九设计研究院工程有限公司 | Construction method for synchronously excavating ultra-large type deep foundation pits in partitioned mode |
-
2017
- 2017-01-24 CN CN201710054782.0A patent/CN108286254A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103590406A (en) * | 2013-11-29 | 2014-02-19 | 中船第九设计研究院工程有限公司 | Construction method for synchronously excavating ultra-large type deep foundation pits in partitioned mode |
Non-Patent Citations (1)
| Title |
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| 许世雄等: "长条形深大基坑分坑支护分区开挖施工及工序优化技术", 《施工技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487798A (en) * | 2018-12-29 | 2019-03-19 | 中交（广州）建设有限公司 | Station asymmetry excavation supporting structure and construction technology |
| CN109487798B (en) * | 2018-12-29 | 2024-03-22 | 中交（广州）建设有限公司 | Asymmetric excavation construction process for station |
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Application publication date: 20180717 |