CN106592606A - Foundation pit support construction method suitable for three-free-face building envelope - Google Patents
Foundation pit support construction method suitable for three-free-face building envelope Download PDFInfo
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- CN106592606A CN106592606A CN201710044540.3A CN201710044540A CN106592606A CN 106592606 A CN106592606 A CN 106592606A CN 201710044540 A CN201710044540 A CN 201710044540A CN 106592606 A CN106592606 A CN 106592606A
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- Prior art keywords
- foundation pit
- construction
- foundation
- excavated
- building enclosure
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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
- 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)
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Abstract
The invention relates to a foundation pit support construction method suitable for a three-free-face building envelope. The construction method comprises the following construction steps: (1) constructing fender posts and top beams of a foundation pit, wherein three faces of the fender posts of the foundation pit are in a free state in an underground ground floor; (2) carrying out earth excavation of the foundation pit, and constructing breast beams and concrete supports, wherein the supports in the foundation pit are all made of reinforced concrete; and (3) excavating to the bottom of the foundation pit and pouring a concrete cushion and a concrete bottom plate. According to the invention, reinforced concrete supports are adopted, so that the stress form of the building envelope is changed, pressed and pulled characteristics of the reinforced concrete supports are fully expressed, the safety of a supporting structure of the foundation pit is improved, and the integrity of the supporting structure is better; and in addition, the supporting problem caused during the excavation process of the three-free-face deep foundation pit is better solved, so that the excavation construction is safer and more reasonable.
Description
【Technical field】
The present invention relates to the construction method that a kind of foundation ditch is supported, and in particular to a kind of to be suitable to three bases for facing sky building enclosure
Hole Construction of Supporting method, belongs to architectural engineering construction technique field.
【Background technology】
As the step of urbanization does not stop to stride forward, the development in city is more and more faster, and underground space development will be in city
Critical role is occupied in city's construction.In deep-foundation pit engineering, it is country rock that the periphery of foundation ditch is typically surrounding, the supporter of employing
System is generally all that form, the support below of first support Guan Liang+reinforced concrete support all adopts bracing members, only pressurized
Not tension；Or using baffle plate supporting between anchor cable+stake.
However, in urban architecture compact district, complicated surrounding enviroment make excavation of foundation pit to face various problems, its
It is middle than it is more prominent be exactly that foundation pit enclosure stake outer portion region does not have country rock, the state in sky is faced.If adopting in this case
Inner support system is bracing members, and bracing members are unable to tension, then be possible to base in having where free face
Short side is faced to (dorsad foundation ditch inner side) deformation in hole, so that bracing members come off, causes security incident.
Therefore, be to solve above-mentioned technical problem, it is necessory to provide a kind of innovation be suitable to three face sky building enclosure
Foundation ditch Construction of Supporting method, to overcome the defect of the prior art.
【The content of the invention】
To solve the above problems, it is an object of the invention to provide a kind of three foundation ditches for facing sky building enclosure that are suitable to are supported
Construction method, it is whole with fender post, base plate, Guan Liang one frame structure of composition in the form of waist rail+reinforced concrete support
Body, increased the stability of foundation ditch support.
For achieving the above object, the technical scheme taken of the present invention is：It is a kind of to be suitable to three foundation ditches for facing sky building enclosure
Construction of Supporting method, it includes following construction procedure：
1), construction foundation pit fender post and Guan Liang, foundation pit enclosure stake has three faces in facing dummy status in the negative one layer of underground；
2), pit earthwork is excavated, construct waist rail and concrete support, and internal support of foundation pit is all using armored concrete
Support；
3) bottom of foundation ditch, cast plain concrete cushion layer and base plate, are excavated to.
The present invention the three foundation ditch Construction of Supporting methods for facing sky building enclosure that are suitable to be further：The step 1) in,
Foundation pit enclosure stake is cast-in-situ bored pile；Pit earthwork excavates palpus fender post and reaches and can carry out after design requirement.
The present invention the three foundation ditch Construction of Supporting methods for facing sky building enclosure that are suitable to be further：The step 2) in,
The waist rail and per pass reinforced concrete support that the foundation pit enclosure stake, Guan Liang, per pass are supported forms a whole stress system.
The present invention the three foundation ditch Construction of Supporting methods for facing sky building enclosure that are suitable to be further：The step 2) in,
Before pit earthwork is excavated, sump and intercepting ditch composition top drainage system are provided with the outside of foundation ditch；Protect in digging process
Building enclosure, the cubic metre of earth and stone in the range of building enclosure 300mm is removed using excavated by manual work.
The present invention the three foundation ditch Construction of Supporting methods for facing sky building enclosure that are suitable to also be：The step 2) in, work as base
Hole earth excavation can carry out applying for waist rail and concrete support to waist rail designed elevation；After reaching waist rail designed elevation,
Waist rail embedded ribs are dug out with hydraulic breaker and pneumatic pick machine, when cutting, concrete is cut on pile body from horizontal direction first, while from
On down in layer slowly cut, till waist rail embedded ribs are dug out, dug with air compressor machine will cut face blow and spray totally, will
Embedded ribs are adjusted to design attitude.
Compared with prior art, the present invention has the advantages that：
1) present invention all adopts reinforced concrete support, changes the stress form of building enclosure, gives full play to reinforcing bar
Concrete compression tension characteristic, while improving the safety of foundation pit supporting construction, supporting construction globality is preferable.
2) under similar conditions the scope of application is wider for the present invention, for features as poor geologic condition, surrounding enviroment are complicated and cause to face
For the foundation ditch in empty face, advantageously.
3) present invention can provide it is a kind of it is safe, can it is pressurized and can tension be suitable to three face sky building enclosure
The design and construction method that foundation ditch is supported.
【Description of the drawings】
Fig. 1 be the present invention step 2) after the completion of schematic diagram.
Fig. 2 be the present invention step 3) after the completion of schematic diagram.
【Specific embodiment】
Refer to shown in Figure of description 1 and accompanying drawing 2, the present invention is suitable to three foundation ditches for facing sky building enclosure for a kind of
Support construction method, it includes following construction procedure：
1), construction foundation pit fender post 1 and Guan Liang 2, foundation pit enclosure stake 1 has three faces in facing sky shape in underground negative one layer 3
State, i.e., without rock mass or only very thin rock mass, such as Fig. 1.
2), pit earthwork is excavated, construction waist rail 4 and concrete support 5, it is contemplated that have three to face sky in underground negative one layer 3
The presence in face, internal support of foundation pit all adopts reinforced concrete support, can not only pressurized but also tension, support profile such as Fig. 2.
3) bottom of foundation ditch, cast plain concrete cushion layer and base plate 6, such as Fig. 2, are excavated to.
Further, the step 1) in, fender post 1 is cast-in-situ bored pile；Excavation of foundation pit palpus fender post reaches design will
Can carry out after asking.
In the step (2), waist rail 4 and per pass reinforced concrete support 5 that foundation pit enclosure stake 1, Guan Liang 2, per pass are supported
Form a whole stress system, it is ensured that three face the safety of the foundation ditch of dummy status and globality, can be pressurized and can receive
Draw, it is better than traditional bracing members mechanical property.
Sky, traditional bracing members are faced because underground negative one layer 3 has three, it is impossible to which meeting not only pressurized but also tension stress will
Ask, so pressure and pulling force just can only can be born using armored concrete.
Before Excavation Process, sump and the composition top drainage system of intercepting ditch 7 should be provided with the outside of foundation ditch, it is to avoid
Hole other places shows that water is flowed in foundation ditch；
Strict protection building enclosure 1 is answered in digging process, the cubic metre of earth and stone in the range of building enclosure 300mm is using artificial
Excavate；
Applying for waist rail 4 and concrete support 5 is carried out by after 4 designed elevation of waist rail is excavated to；
Reach the designed elevation of waist rail 4 after, dig out waist rail embedded ribs with hydraulic breaker and pneumatic pick machine, when cutting, first from
Horizontal direction cuts concrete on pile body, while in layer slowly cut from top to bottom, till waist rail embedded ribs are dug out, chisel
Complete air compressor machine will cut face and blow and spray totally, and embedded ribs are adjusted to into design attitude.
Near free face 8 during construction reinforced bar concrete support, it should strengthen monitoring, carry out information-aided construction.
In the step (3), base plate 6 being carried out in time and being poured, base plate 6 has one after the completion of pouring equivalent to hole bottom position
The effect of support, to periphery fender post 1 very strong constraint is played.Base plate 6 is constituted with fender post 1, reinforced concrete support 5, waist rail 4
One entirety, can strengthen the non-deformability of the foundation pit enclosure structure.
Specific embodiment above is only the preferred embodiment of this creation, all in this wound not to limit this creation
Any modification, equivalent substitution and improvements for being done etc. within the spirit of work and principle, should be included in this creation protection domain it
It is interior.
Claims (5)
- It is 1. a kind of to be suitable to the three foundation ditch Construction of Supporting methods for facing sky building enclosure, it is characterised in that：Including following construction procedure：1), construction foundation pit fender post and Guan Liang, foundation pit enclosure stake has three faces in facing dummy status in the negative one layer of underground；2), pit earthwork is excavated, and construct waist rail and concrete support, internal support of foundation pit all adopts reinforced concrete support；3) bottom of foundation ditch, cast plain concrete cushion layer and base plate, are excavated to.
- 2. the three foundation ditch Construction of Supporting methods for facing sky building enclosure are suitable to as claimed in claim 1, it is characterised in that：It is described Step 1) in, foundation pit enclosure stake is cast-in-situ bored pile；Pit earthwork excavates palpus fender post and reaches and can carry out after design requirement.
- 3. the three foundation ditch Construction of Supporting methods for facing sky building enclosure are suitable to as claimed in claim 1, it is characterised in that：It is described Step 2) in, the waist rail and per pass reinforced concrete support that the foundation pit enclosure stake, Guan Liang, per pass are supported forms a whole and receives Power system.
- 4. the three foundation ditch Construction of Supporting methods for facing sky building enclosure are suitable to as claimed in claim 1, it is characterised in that：It is described Step 2) in, before pit earthwork is excavated, sump and intercepting ditch composition top drainage system are provided with the outside of foundation ditch；Excavated Building enclosure is protected in journey, the cubic metre of earth and stone in the range of building enclosure 300mm is removed using excavated by manual work.
- 5. the three foundation ditch Construction of Supporting methods for facing sky building enclosure are suitable to as claimed in claim 1, it is characterised in that：It is described Step 2) in, after pit earthwork is excavated to waist rail designed elevation by carry out applying for waist rail and concrete support；Reach waist After beam designed elevation, waist rail embedded ribs are dug out with hydraulic breaker and pneumatic pick machine, when cutting, first from horizontal direction on pile body Concrete is cut, while in layer slowly cutting from top to bottom, till waist rail embedded ribs are dug out, having dug will be cut with air compressor machine Face blows and sprays totally, and embedded ribs are adjusted to into design attitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044540.3A CN106592606A (en) | 2017-01-19 | 2017-01-19 | Foundation pit support construction method suitable for three-free-face building envelope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044540.3A CN106592606A (en) | 2017-01-19 | 2017-01-19 | Foundation pit support construction method suitable for three-free-face building envelope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106592606A true CN106592606A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710044540.3A Pending CN106592606A (en) | 2017-01-19 | 2017-01-19 | Foundation pit support construction method suitable for three-free-face building envelope |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288136A (en) * | 2017-08-17 | 2017-10-24 | 中国建筑第八工程局有限公司 | The structure and its method of building foundation pit protection |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850226A (en) * | 1981-09-21 | 1983-03-24 | Marubeni Kenzai Lease Kk | Brace receiver |
| CN105804084A (en) * | 2016-03-25 | 2016-07-27 | 中铁三局集团广东建设工程有限公司 | Excavation construction method of small foundation pit near excavated deep foundation pit |
| CN205776249U (en) * | 2016-05-27 | 2016-12-07 | 中国建筑西南勘察设计研究院有限公司 | A kind of combined inner supporting structure |
-
2017
- 2017-01-19 CN CN201710044540.3A patent/CN106592606A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850226A (en) * | 1981-09-21 | 1983-03-24 | Marubeni Kenzai Lease Kk | Brace receiver |
| CN105804084A (en) * | 2016-03-25 | 2016-07-27 | 中铁三局集团广东建设工程有限公司 | Excavation construction method of small foundation pit near excavated deep foundation pit |
| CN205776249U (en) * | 2016-05-27 | 2016-12-07 | 中国建筑西南勘察设计研究院有限公司 | A kind of combined inner supporting structure |
Non-Patent Citations (1)
| Title |
|---|
| 陈克济: "《地铁工程施工技术》", 30 June 2014, 中国铁道出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288136A (en) * | 2017-08-17 | 2017-10-24 | 中国建筑第八工程局有限公司 | The structure and its method of building foundation pit protection |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
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Application publication date: 20170426 |