CN108824485A - The construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation - Google Patents
The construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation Download PDFInfo
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- CN108824485A CN108824485A CN201810626735.3A CN201810626735A CN108824485A CN 108824485 A CN108824485 A CN 108824485A CN 201810626735 A CN201810626735 A CN 201810626735A CN 108824485 A CN108824485 A CN 108824485A
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- main structure
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- pipe pile
- excavation
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses the construction methods of rock-soil layer supporting outside side wall in a kind of sheltered reverse excavation, including following construction procedure：（1）The Construction Arrangement solid matter steel-pipe pile outside the design boundary of main structure side wall, steel-pipe pile insertion depth be by ground surface to the bottom surface of main structure bottom plate below；（2）Dig one layer of earthwork from up to down by ground, and excavate the groove of certain depth downwards along the steel-pipe pile inner wall of main structure side, in the trench and excavate layer pour one layer of hypogee contignation formed main structure top plate, after main structure top plate reaches some strength, foundation pit is backfilled on main structure top plate and forms coating；（3）The construction of underground main body structural excavation is carried out, the construction of main structure exterior wall is carried out after excavation, finally pours to form main structure bottom plate in main structure bottom.Construction technology of the present invention is simple, accelerates main structure side wall construction speed, strong operability, safety is higher, and construction cost is low.
Description
Technical field
The present invention relates to a kind of outer rock-soil layer branch of side wall in underground engineering construction construction field more particularly to sheltered reverse excavation
The construction method of shield.
Background technique
With urban construction and the continuous development of other infrastructures, the development and utilization of the underground space is to become China
The development trend of building trade, the underground construction engineering of complex environment is more and more therewith, and the difficulty of design and construction is also more next
Bigger, the construction of underground engineering at present mostly uses greatly along two methods of the practice or contrary sequence method.In the construction process due to the suitable practice
The limitation that will receive environmental condition etc. causes construction cost the drawbacks such as increase, be unfavorable for excavating again, therefore, multiple for environment
Miscellaneous underground engineering is constructed more appropriate using sheltered reverse excavation.Sheltered reverse excavation refers to is excavated to certain depth by ground downwards
Afterwards, will be top closed, remaining lower part engineering is constructed under closed top plate, i.e., successively excavates from top to bottom and build master
Body structure is until bottom.In current sheltered reverse excavation work progress, usually using export-oriented along main structure side wall design boundary
It is lower fluting to main structure bottom, casting concrete and form diaphragm wall, in this, as hypogee structure side wall and side wall outside
The building enclosure of rock-soil layer, while having off position construction intermediate studdle in building interior, to form the vertical load-bearing of contrary sequence method
System.This method relatively expends reinforcing bar and concrete, and the construction period that the solidification of concrete need to consume, complicated construction technique are applied
Work is expensive.
Summary of the invention
In order to solve the above technical problems, the present invention provides the constructions of rock-soil layer supporting outside side wall in a kind of sheltered reverse excavation
Method, this method can effectively solve going along with sb. to guard him for the outer rock-soil layer of hypogee structure side wall and side wall, and have efficiently construction,
The advantages that structure safety and reduction construction cost.
In order to achieve the above object, the invention adopts the following technical scheme：
The construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation, including following construction procedure：
（1）The Construction Arrangement solid matter steel-pipe pile outside the design boundary of main structure side wall, steel-pipe pile insertion depth are by ground surface
To the bottom surface of main structure bottom plate；
（2）Dig one layer of earthwork from up to down by ground, and the steel-pipe pile inner wall along main structure side excavates downwards certain depth
Groove, in the trench and excavate layer pour one layer of hypogee contignation formed main structure top plate, work as main structure
After top plate reaches some strength, foundation pit is backfilled on main structure top plate and forms coating；
（3）The construction of underground main body structural excavation is carried out, the construction of main structure exterior wall is carried out after excavation, finally at main structure bottom
Portion pours to form main structure bottom plate.
Preferably, the insertion depth of the steel-pipe pile be by least 2m below ground surface to the bottom surface of main structure bottom plate,
So that steel-pipe pile is simultaneously by horizontally-supported in coating, main structure top plate, main structure bottom plate and its underpart rock-soil layer
Effect, to improve the stability and bearing capacity of steel-pipe pile.
Preferably, the spacing of adjacent two steel-pipe pile of the solid matter steel-pipe pile is 350~450mm, avoids being spaced excessive, is led
Cause work progress in because between adjacent steel-pipe pile rock-soil layer it is unstable due to cause rock-soil layer partial collapse.
Preferably, stage excavation mode is used when the underground main body structural excavation is constructed, after completing one layer of excavation, is carried out
The construction of this layer of structure outer.
Preferably, the steel-pipe pile is equipped with multiple apertures, can be into steel-pipe pile when regional level of ground water of constructing is higher
Slip casting, so that slurry passes through soil layer around the aperture and stake being arranged on steel-pipe pile and forms soil cement, to improve the anti-of soil layer
Penetrating power and stability.
Compared with prior art, beneficial effects of the present invention are as follows：
1. the present invention substitutes RC Continuous wall by using arrangement solid matter steel-pipe pile, saves and disappear needed for concrete setting
The duration of consumption, and steel-pipe pile is cheap, saves the duration to reach, reduces the purpose of construction cost；
2. the present invention passes through the insertion depth of strict control steel-pipe pile, so that the interior water that steel-pipe pile is applied by various structures simultaneously
Flat supporting role improves the stability and bearing capacity of steel-pipe pile, the unstable of steel-pipe pile is effectively avoided to lead to main structure
And partial collapse accident occurs for surrounding rock-soil layer, substantially increases construction safety；
3. the present invention passes through the spacing to steel pipe setting aperture and the adjacent steel-pipe pile of strict control, effectively solution work progress
The adverse effect occurred by soil layer unstability, improve construction safety.
Detailed description of the invention
Fig. 1 is general structure schematic diagram of the invention.
Fig. 2 is steel-pipe pile schematic diagram in Fig. 1.
It is marked in figure：1- rock-soil layer, 2- coating, 3- main structure top plate, 4- main structure, 5- main structure bottom plate,
6- main structure side wall, 7- steel-pipe pile, 8- aperture.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
As Figure 1-Figure 2, in a kind of sheltered reverse excavation the outer rock-soil layer supporting of side wall construction method, using covered back-digging
When method is constructed, before main structure 4 is constructed, Construction Arrangement outside boundary is first designed along main structure side wall 6 by screw pile driver
Solid matter steel-pipe pile, the insertion depth of the steel-pipe pile 7 are to be made by least 2m below ground surface to the bottom surface of main structure bottom plate 5
For the building enclosure of rock-soil layer 1 outside underground main body structure side wall 6 and side wall.The spacing of adjacent two steel-pipe pile 7 is 350~450mm,
Avoid being spaced it is excessive, cause in work progress because between adjacent two steel-pipe pile rock-soil layer it is unstable due to cause rock-soil layer locally to collapse
It collapses.
Then, one layer of earthwork is dug from up to down by ground, and 7 inner wall of steel-pipe pile along 4 side of main structure excavates downwards
The groove of 400~500mm depth, casting concrete contignation is as main structure top plate 3, after it reaches some strength,
Then the interior horizontal support structure that can be used as building enclosure backfills foundation pit, the as covering in diagram on main structure top plate 3
Layer 2, to reach the safety requirements that can continue to construct downwards.
When carrying out 4 excavation construction of underground main structure, stage excavation mode is generally used, legend of the present invention, which uses, divides three
Layer, which excavates, carries out Technical Analysis, after completing first layer excavation, carries out the construction of this layer of structure outer.Then the second layer is carried out
It excavates, at the end of the second layer excavates, the structure side wall that first layer construction is built is in vacant state, in main structure top plate 3
Also there is construction joint between the side wall for thering is construction joint to be formed between main structure side wall 6, and constructing after each layer excavates, is covering
Under the collective effect of layer 2, main structure top plate 3 and soil pressure, main structure side wall 6 is also easy to produce deformation or cracking phenomena, at this point,
By the setting of solid matter steel-pipe pile, solid matter steel-pipe pile directly bears the soil pressure effect of the outer rock-soil layer 1 of main structure side wall 6,
The stress for effectively slowing down main structure side wall 6 avoids main structure side wall from directly being acted on and had an adverse effect by soil pressure,
To improve working security, it is successively excavated to main structure bottom downwards, finally pours to form main structure bottom plate 5.
Solid matter steel-pipe pile is ultimately formed simultaneously by coating 2, main structure top plate 3, main structure bottom plate 5 and its underpart
The interior horizontal support effect of rock-soil layer, substantially increases the stability and bearing capacity of steel-pipe pile 7, restricts steel-pipe pile 7 weeks with this
Influence of the country rock soil layer 1 to underground structure major project.
Particularly, when regional level of ground water of constructing is higher, multiple apertures 8 can be set on steel-pipe pile 7, it can be toward steel-pipe pile
Slip casting in 7, so that slurry forms soil cement by soil layer around the aperture 8 and stake on steel-pipe pile 7, to improve the anti-of soil layer
Penetrating power and stability.
With the help of the introduction present in aforementioned specification and relevant drawings, those skilled in the art in the invention will
It will recognize that many modifications and other embodiments of the invention.It will consequently be understood that the present invention is not limited to disclosed specific realities
Scheme is applied, modification and other embodiments are to be considered as included in scope of the appended claims.Although spy is used herein
Determine term, they are only used with generic and descriptive sense, rather than limitation.
Claims (5)
1. the construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation, it is characterised in that：Including following construction procedure：
（1）The Construction Arrangement solid matter steel-pipe pile outside the design boundary of main structure side wall, steel-pipe pile insertion depth are by ground surface
To the bottom surface of main structure bottom plate；
（2）Dig one layer of earthwork from up to down by ground, and the steel-pipe pile inner wall along main structure side excavate 400 downwards~
The groove of 500mm depth, casting concrete contignation is as main structure top plate, after it reaches some strength, in main body
Foundation pit is backfilled in structure roof forms coating；
（3）The construction of underground main body structural excavation is carried out, the construction of main structure exterior wall is carried out after excavation, finally at main structure bottom
Portion pours to form main structure bottom plate.
2. the construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation as described in claim 1, it is characterised in that：
The insertion depth of the steel-pipe pile is by least 2m below ground surface to the bottom surface of main structure bottom plate.
3. the construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation as described in claim 1, it is characterised in that：
The spacing of adjacent two steel-pipe pile of the solid matter steel-pipe pile is 350~450mm.
4. the construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation as described in claim 1, it is characterised in that：
Stage excavation mode is used when the underground main body structural excavation is constructed, and after completing one layer of excavation, carries out this layer of structure outer
Construction.
5. the construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation as described in claim 1-4 any one,
It is characterized in that：The steel-pipe pile is equipped with multiple apertures, when regional level of ground water of constructing is higher, can infuse into steel-pipe pile
Slurry, so that slurry passes through soil layer around the aperture and stake being arranged on steel-pipe pile and forms soil cement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626735.3A CN108824485A (en) | 2018-06-19 | 2018-06-19 | The construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation |
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|---|---|---|---|
| CN201810626735.3A CN108824485A (en) | 2018-06-19 | 2018-06-19 | The construction method of the outer rock-soil layer supporting of side wall in a kind of sheltered reverse excavation |
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| CN108824485A true CN108824485A (en) | 2018-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232686A (en) * | 2021-12-03 | 2022-03-25 | 中铁四院集团西南勘察设计有限公司 | Construction method for underground structure cover excavation and top-down construction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202969371U (en) * | 2012-11-14 | 2013-06-05 | 福建工程学院 | Novel pipe pile |
| CN103741714A (en) * | 2013-12-09 | 2014-04-23 | 中国建筑第二工程局有限公司 | Full-cover excavation top-down construction method for underground engineering |
| CN105464134A (en) * | 2015-12-31 | 2016-04-06 | 上海建工集团股份有限公司 | Top-down and bottom-up combined construction method and supporting structure of multi-layer underground space below existing facility |
| CN205776406U (en) * | 2016-05-31 | 2016-12-07 | 中铁第四勘察设计院集团有限公司 | A kind of encircling type underground structure covered back-digging waterproof construction |
-
2018
- 2018-06-19 CN CN201810626735.3A patent/CN108824485A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202969371U (en) * | 2012-11-14 | 2013-06-05 | 福建工程学院 | Novel pipe pile |
| CN103741714A (en) * | 2013-12-09 | 2014-04-23 | 中国建筑第二工程局有限公司 | Full-cover excavation top-down construction method for underground engineering |
| CN105464134A (en) * | 2015-12-31 | 2016-04-06 | 上海建工集团股份有限公司 | Top-down and bottom-up combined construction method and supporting structure of multi-layer underground space below existing facility |
| CN205776406U (en) * | 2016-05-31 | 2016-12-07 | 中铁第四勘察设计院集团有限公司 | A kind of encircling type underground structure covered back-digging waterproof construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232686A (en) * | 2021-12-03 | 2022-03-25 | 中铁四院集团西南勘察设计有限公司 | Construction method for underground structure cover excavation and top-down construction |
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Application publication date: 20181116 |