CN212175798U - Whole strutting arrangement of deep basal pit - Google Patents
Whole strutting arrangement of deep basal pit Download PDFInfo
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- CN212175798U CN212175798U CN201922224083.3U CN201922224083U CN212175798U CN 212175798 U CN212175798 U CN 212175798U CN 201922224083 U CN201922224083 U CN 201922224083U CN 212175798 U CN212175798 U CN 212175798U
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- foundation pit
- reinforced concrete
- bottom plate
- concrete supporting
- supporting column
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Abstract
The utility model discloses an integral supporting device for a deep foundation pit, which comprises an enclosing purlin, a structural bottom plate, reinforced concrete supporting columns and a counter support; a U-shaped enclosing purlin is additionally arranged at the middle pit part of the reinforced concrete supporting column at the outer side of the deep foundation pit, and the enclosing purlin and the reinforced concrete supporting column of the foundation pit are connected in a planting bar mode; the reinforced concrete supporting column top steel bars are anchored into the structural bottom plate, so that the structural bottom plate is fixedly connected with the reinforced concrete supporting column; the opposite-bracing reinforcing steel bars are anchored into the structural bottom plate. The local support and the bottom plate are connected in a mode that the influence of a temporary structure on a permanent structure can be reduced in the construction process, and the exposure time of a foundation pit can be reduced while the safety of the foundation pit is guaranteed.
Description
Technical Field
The utility model relates to a construction technical field, concretely relates to whole strutting arrangement of deep basal pit.
Background
The technical scheme in the prior art is as follows: in recent years, with the rapid development of urban construction in China, high-rise and super high-rise buildings are continuously emerging, various large-scale projects are increased day by day, the underground space development scale is also increased, the depth of a foundation pit is deepened, and secondary excavation is increasingly carried out in the existing excavation foundation pit, wherein the inner foundation pit of the secondary excavation is called as a pit-in-pit or an inner pit. As the depth of the foundation pit increases, the danger level of the foundation pit increases, so that a supporting system is required to be added for ensuring the safety of the foundation pit. In the past, a multi-layer horizontal support system and a stand column support are adopted to support a foundation pit in a layered mode.
The prior art has the following disadvantages: in the existing foundation pit excavation operation adopting the inner support system, the more the support systems are, the more the mechanical excavation earthwork conflicts with the support upright posts, and the design height of part of the supports cannot meet the mechanical construction operation surface; the inner support system requires that an annular surrounding purlin is arranged inside a foundation pit, so that the cost and the construction period are increased, the support system conflicts with a structure, the steel bar anchoring length required by the structure cannot be ensured by the reserved position of the structural steel bar, and the quality of a permanent structure is influenced by the temporary structure system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a whole strutting arrangement of deep basal pit has not only reduced the influence of support system to permanent structure quality, can improve the efficiency of construction moreover, shorten construction period, reduce the foundation ditch exposure time.
The integral supporting device for the deep foundation pit comprises an enclosing purlin, a structural bottom plate, reinforced concrete supporting columns and opposite supports; a U-shaped enclosing purlin is additionally arranged at the middle pit part of the reinforced concrete supporting column at the outer side of the deep foundation pit, and the enclosing purlin and the reinforced concrete supporting column of the foundation pit are connected in a planting bar mode; the reinforced concrete supporting column top steel bars are anchored into the structural bottom plate, so that the structural bottom plate is fixedly connected with the reinforced concrete supporting column; the opposite-bracing reinforcing steel bars are anchored into the structural bottom plate.
Preferably, 3 steel bars of 22mm are planted on each reinforced concrete support column.
Preferably, the depth of anchoring each reinforced concrete supporting column during bar planting is more than or equal to 300 mm.
Preferably, the depth of the anchor in the surrounding purlin during bar planting is more than or equal to 400 mm.
Preferably, the purlin is a U-shaped purlin.
The working process and principle are as follows: a U-shaped enclosing purlin is additionally arranged at the position of a pit 6 of a support pile outside a deep foundation pit 5, and the enclosing purlin and the support pile of the foundation pit are connected in a rib planting mode. The supporting system is provided with a corner brace and a diagonal brace, and the diagonal brace is connected with the structural bottom plate, so that the local support and the structural bottom plate form the supporting system. The supporting upright posts are shared with the upper layer or the lower layer of support.
The utility model has the advantages that: the local support and the bottom plate are connected in a mode that the influence of a temporary structure on a permanent structure can be reduced in the construction process, and the exposure time of a foundation pit can be reduced while the safety of the foundation pit is guaranteed. The construction method reduces the investment of materials and labor, thereby reducing the engineering cost, ensuring the construction quality and the use function, shortening the construction period and obtaining good technical and economic benefits.
Drawings
Fig. 1 is the utility model discloses a deep basal pit strutting arrangement sketch map.
Fig. 2 is the utility model discloses the deep foundation ditch local bracing (second support) plane sketch map.
Fig. 3 is a detailed view of the connection between the enclosing purlin at the position A and the supporting piles of the utility model.
Fig. 4 is a detailed view of the connection between the structural bottom plate and the support piles at the position B of the utility model.
The purlin comprises an enclosing purlin 1, a structural bottom plate 2, reinforced concrete supporting columns 3, a butt brace 4, a deep foundation pit 5, a pit-in-pit 6 and reinforcing steel bars 7.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
As shown in fig. 1 to 4, the integral supporting device for the deep foundation pit comprises an enclosing purlin 1, a structural bottom plate 2, reinforced concrete supporting columns 3 and opposite supports 4; a U-shaped enclosing purlin 1 is additionally arranged at the middle pit part of the reinforced concrete support column 3 at the outer side of the deep foundation pit, and the enclosing purlin 1 and the reinforced concrete support column 3 of the foundation pit are connected in a planting bar mode; the reinforced concrete supporting columns 3 are anchored into the structural bottom plate 2 through reinforcing bars, so that the structural bottom plate 2 is fixedly connected with the reinforced concrete supporting columns 3; the counter-bracing 4 steel bars are anchored into the structural bottom plate 2.
Specifically, the purlin and the support pile are connected in a manner that: 3 reinforcing steel bars 7 with the length of 22mm are embedded in each supporting pile, the anchoring depth of each supporting pile is more than or equal to 300mm, and the anchoring depth of each anchoring surrounding purlin is more than or equal to 400 mm; the connection mode of the structural bottom plate and the support piles is as follows: anchoring the top reinforcing steel bars of the supporting piles into the structural bottom plate to enable the structural bottom plate and the supporting piles to form a whole; the connection mode of the diagonal brace (inclined brace) and the shallow foundation structure bottom plate is as follows: and anchoring the diagonal bracing into the shallow foundation slab.
The working process and principle are as follows: a U-shaped enclosing purlin is additionally arranged at the position of a pit 6 of a support pile outside a deep foundation pit 5, and the enclosing purlin and the support pile of the foundation pit are connected in a rib planting mode. The supporting system is provided with a corner brace and a diagonal brace, and the diagonal brace is connected with the structural bottom plate, so that the local support and the structural bottom plate form the supporting system. The supporting upright posts are shared with the upper layer or the lower layer of support.
Based on the above, the utility model discloses well local support and bottom plate connected mode not only can reduce the influence of temporary structure to permanent structure in the work progress, can also reduce the foundation ditch exposure time when guaranteeing foundation ditch safety. The construction method reduces the investment of materials and labor, thereby reducing the engineering cost, ensuring the construction quality and the use function, shortening the construction period and obtaining good technical and economic benefits.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (5)
1. The integral supporting device for the deep foundation pit is characterized by comprising an enclosing purlin (1), a structural bottom plate (2), reinforced concrete supporting columns (3) and a counter brace (4); a U-shaped enclosing purlin (1) is additionally arranged at the middle pit position of the reinforced concrete supporting column (3) at the outer side of the deep foundation pit, and the enclosing purlin (1) and the reinforced concrete supporting column (3) of the foundation pit are connected in a planting bar mode; the reinforced concrete supporting column (3) is anchored into the structural bottom plate (2) by a steel bar, so that the structural bottom plate (2) is fixedly connected with the reinforced concrete supporting column (3); the opposite support (4) is anchored into the structural bottom plate (2).
2. The integral supporting device for the deep foundation pit according to claim 1, wherein: 3 reinforcing steel bars (7) with the length of 22mm are planted on each reinforced concrete supporting column (3).
3. The integral supporting device for the deep foundation pit as claimed in claim 2, wherein: the depth of anchoring each reinforced concrete supporting column (3) during bar planting is more than or equal to 300 mm.
4. The integral supporting device for the deep foundation pit as claimed in claim 3, wherein: the depth of the anchor in the surrounding purlin (1) during bar planting is more than or equal to 400 mm.
5. The integral supporting device for the deep foundation pit as claimed in claim 4, wherein: the enclosing purlin (1) is a U-shaped enclosing purlin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922224083.3U CN212175798U (en) | 2019-12-12 | 2019-12-12 | Whole strutting arrangement of deep basal pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922224083.3U CN212175798U (en) | 2019-12-12 | 2019-12-12 | Whole strutting arrangement of deep basal pit |
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| Publication Number | Publication Date |
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| CN212175798U true CN212175798U (en) | 2020-12-18 |
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| CN201922224083.3U Active CN212175798U (en) | 2019-12-12 | 2019-12-12 | Whole strutting arrangement of deep basal pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005388A (en) * | 2019-12-12 | 2020-04-14 | 中冶天工集团有限公司 | Deep foundation pit integral supporting device and supporting method thereof |
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2019
- 2019-12-12 CN CN201922224083.3U patent/CN212175798U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005388A (en) * | 2019-12-12 | 2020-04-14 | 中冶天工集团有限公司 | Deep foundation pit integral supporting device and supporting method thereof |
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