CN113006083A - Support changing construction method for foundation pit inner support - Google Patents
Support changing construction method for foundation pit inner support Download PDFInfo
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- CN113006083A CN113006083A CN202110230923.6A CN202110230923A CN113006083A CN 113006083 A CN113006083 A CN 113006083A CN 202110230923 A CN202110230923 A CN 202110230923A CN 113006083 A CN113006083 A CN 113006083A
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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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Abstract
The invention relates to a support replacement construction method for an inner support of a foundation pit, which comprises the following steps: step S1: dividing the foundation pit into a plurality of construction areas through a post-cast strip; step S2: constructing an inner support structure in a construction area to support the construction area; step S3: constructing a main structure in the construction area; step S4: in the process of constructing the girder and slab of the main structure, constructing inclined struts obliquely connected to the main structure and the inner support structure; step S5: after the diagonal braces and the main structure beam slabs meet the design strength, removing the inner support structure in the construction area; step S6: and transferring the inner support structure to the next construction area, and repeating the steps S2 to S5 until the construction of the foundation pit is completed. The invention can partially remove the internal supporting structure in advance. When the inner supporting structure of the foundation pit is dismantled, the stability and force transmission continuity of the main structure are ensured and the safety stability of the structure is improved through the integral structure formed by the inclined strut, the main structure and the inner supporting structure.
Description
Technical Field
The invention relates to the field of building construction, in particular to a support changing construction method for an inner support of a foundation pit.
Background
The foundation pit inner support is one kind of foundation pit support. In the foundation pit inner support system, the premise of inner support dismantling construction is that the inner support dismantling construction can be carried out after the concrete structure is completely constructed and the design strength is reached. The key condition influencing the inner support removal is to ensure that the structure construction is completed so as to replace the inner support to transmit force and bear force.
If the inner support spans one or more post-cast strips, planning according to normal construction running water, wherein one of two areas divided by the post-cast strips is constructed in advance, and the other area is constructed later. The concrete main body structures in all areas need to be completely constructed, the inner support dismantling construction can be carried out after the designed strength is achieved, the inner support of the part cannot be dismantled in advance, and the construction progress is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a support changing construction method for an inner support of a foundation pit, and solves the problem that the construction progress is influenced because part of the inner support cannot be dismounted in advance in the prior art.
The technical scheme for realizing the purpose is as follows:
the invention provides a support replacing construction method for an inner support of a foundation pit, which comprises the following steps:
step S1: dividing the foundation pit into a plurality of construction areas through a post-cast strip;
step S2: constructing an inner support structure within one of the construction zones to support the construction zone;
step S3: constructing a main structure in the construction zone;
step S4: in the process of constructing the main body structure, constructing inclined struts obliquely connected to the main body structure and the inner support structure simultaneously;
step S5: after the inclined strut and the main structure meet the design strength, removing the inner support structure in the construction area;
step S6: and transferring the inner support structure to the next construction area, and repeating the steps S2 to S5 until the construction of the foundation pit is completed.
The support changing construction method for the foundation pit inner support is further improved in that the step S2 comprises the following steps:
constructing a plurality of vertical column piles in the construction area;
the construction level connect in construction district in a plurality of interior bracing roof beam of a plurality of column pile, the tip of interior bracing roof beam supports in one the inner wall of construction district.
The support changing construction method for the foundation pit inner support is further improved in that the step S3 comprises the following steps:
constructing a main body beam which is horizontally arranged and is in cross connection in the construction area, wherein the main body beam is positioned below the inner supporting beam;
constructing a main body column fixed at the bottom of the main body beam;
the construction is laid on the main body plate of the main body beam.
The support changing construction method for the foundation pit inner support is further improved in that the step S4 comprises the following steps:
one end of the inclined strut is fixed at the joint of the main beam and the main column, and the other end of the inclined strut is fixed at the intersection of the upright column pile and the inner supporting beam.
The support changing construction method for the foundation pit inner support is further improved in that the method further comprises the step of constructing a multi-layer inner support beam along the height direction of the upright post pile.
The support-changing construction method of the foundation pit inner support is further improved in that,
the method further comprises the step of constructing a multi-layer main structure along the height direction of the upright post pile, wherein each layer of main structure is located below the inner supporting beam of the corresponding layer.
The support changing construction method for the foundation pit inner support is further improved in that the step S4 comprises the following steps: and constructing a plurality of inclined struts on the same side of the inner support beam on the same layer.
The support changing construction method for the foundation pit inner support has the beneficial effects that:
the invention supports between the main structure and the inner support structure by constructing the inclined strut while constructing the main structure, and integrally forms a triangular support back-jacking shape, thereby having the effect of reinforcing and supporting the foundation pit. After the concrete strength of the main body structure reaches the design requirement, the inner support structure can be partially dismantled, the support is dismantled in advance, and the quick support dismantling effect is achieved, so that the problem that the construction progress is influenced because the inner support of the part cannot be dismantled in advance in the prior art is solved. When the inner supporting structure of the foundation pit is dismantled, the stability and force transmission continuity of the main structure are ensured and the safety stability of the structure is improved through the integral structure formed by the inclined strut, the main structure and the inner supporting structure.
Drawings
Fig. 1 and fig. 2 are schematic perspective views of construction states at two viewing angles in the support replacement construction method for the foundation pit inner support according to the present invention.
Fig. 3 is a front view of a construction state of the support changing construction method for the foundation pit inner support of the present invention.
Fig. 4 is a plan view of a construction state of the support replacement construction method for the foundation pit inner support according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, a schematic perspective view of a construction state at two viewing angles of the support replacement construction method for the support in the foundation pit according to the present invention is shown. Fig. 3 is a front view of a construction state of the support changing construction method for the foundation pit inner support of the present invention. With reference to fig. 1 to 3, the method for replacing the support of the foundation pit inner support of the present invention includes:
step S1: dividing the foundation pit into a plurality of construction areas through a post-cast strip;
step S2: constructing the inner support structure 10 within a construction zone to support the construction zone;
step S3: constructing the main structure 20 in a construction zone;
step S4: in the process of constructing the main body structure 20, constructing the diagonal braces 30 obliquely connected to the main body structure 20 and the inner support structure 10 at the same time;
step S5: after the inclined strut 30 and the main structure 20 meet the design strength, the inner support structure 10 in the construction area is dismantled;
step S6: the inner support structure 10 is transferred to the next construction zone and the steps S2 to S5 are repeated until the construction of the foundation pit is completed.
The invention supports between the main structure and the inner support structure by constructing the inclined strut while constructing the main structure, and integrally forms a triangular support back-jacking shape, thereby having the effect of reinforcing and supporting the foundation pit. After the concrete strength of the main body structure reaches the design requirement, the inner support structure can be partially dismantled, the support is dismantled in advance, and the quick support dismantling effect is achieved, so that the problem that the construction progress is influenced because the inner support of the part cannot be dismantled in advance in the prior art is solved. When the inner supporting structure of the foundation pit is dismantled, the stability and force transmission continuity of the main structure are ensured and the safety stability of the structure is improved through the integral structure formed by the inclined strut, the main structure and the inner supporting structure.
As a preferred embodiment of the support replacement construction method for the foundation pit inner support of the present invention, step S2 includes: constructing a plurality of vertical upright piles 11 in a construction area; a plurality of inner support beams 12 horizontally connected to the plurality of stud piles 11 are constructed in a construction zone, and ends of the inner support beams 12 are supported on an inner wall of a construction zone. Through constructing a plurality of upright piles 11 and interior bracing beam 12 drawknot and connecting into overall structure, form interior bearing structure 10, support the foundation ditch through interior bearing structure 10, guarantee the stability of the interior structure of foundation ditch, be convenient for carry out the construction of foundation ditch.
Further, the inner bracing beam 12 includes a transverse inner bracing beam 120 transversely connected to two adjacent stud piles 11, and a longitudinal inner bracing beam 121 longitudinally connected to two adjacent stud piles 11. The two transverse inner bracing beams 120 and the two longitudinal inner bracing beams 121 enclose a rectangle.
As a preferred embodiment of the method for replacing the support of the foundation pit inner support according to the present invention, fig. 4 is a plan view of a construction state of the method for replacing the support of the foundation pit inner support according to the present invention. As shown in fig. 1 to 4, step S3 includes: constructing a main body beam 21 which is horizontally arranged and is in cross connection in a construction area, wherein the main body beam 21 is positioned below the inner supporting beam 12; constructing a main body column 22 fixed at the bottom of the main body beam 21; the main body plate 23 laid on the main body beam 21 is constructed.
Further, after the construction is completed, the test blocks of the main body structure 20 are checked to confirm that the inclined strut and the main body structure both meet the design strength, so that the safety is ensured, and the dismantling construction is facilitated.
As a preferred embodiment of the support replacement construction method for the foundation pit inner support of the present invention, step S4 includes: one end of the inclined strut 30 is fixed at the joint of the main body beam 21 and the main body column 22, and the other end of the inclined strut 30 is fixed at the intersection of the stud pile 11 and the inner supporting beam 12. The integral structure formed by the inclined strut, the main body structure and the inner support structure ensures the stability of the main body structure and the continuity of force transmission, and improves the safety and stability of the structure.
As a preferred embodiment of the support changing construction method for the foundation pit support of the present invention, the method further includes constructing a multi-layer inner support beam 12 along the height direction of the stud pile 11. The specific layer number is determined according to the requirement of actual foundation pit construction.
As a preferred embodiment of the support changing construction method for the foundation pit support, the method further includes constructing a plurality of layers of main structures 20 along the height direction of the stud pile 11, and each layer of main structure 20 is located below the inner support beam 12 of the corresponding layer.
As a preferred embodiment of the support replacement construction method for the foundation pit inner support of the present invention, step S4 includes: a plurality of inclined struts 30 are constructed on the same side of the inner support beam 12 on the same layer, and the inclined struts are not allowed to be arranged in different directions on the same layer, so that the stress stability is ensured.
In particular, the inner support beams are typically provided above the body structure. And if one or more post-cast strips stretch across the middle of one inner supporting beam, planning according to normal construction flowing water, and constructing one construction area in the two construction areas divided by the post-cast strips in advance.
The support changing construction method for the foundation pit inner support has the beneficial effects that:
the invention supports between the main structure and the inner support structure by constructing the inclined strut while constructing the main structure, and integrally forms a triangular support back-jacking shape, thereby having the effect of reinforcing and supporting the foundation pit. After the concrete strength of the main body structure reaches the design requirement, the inner support structure can be partially dismantled, the support is dismantled in advance, and the quick support dismantling effect is achieved, so that the problem that the construction progress is influenced because the inner support of the part cannot be dismantled in advance in the prior art is solved. When the inner supporting structure of the foundation pit is dismantled, the stability and force transmission continuity of the main structure are ensured and the safety stability of the structure is improved through the integral structure formed by the inclined strut, the main structure and the inner supporting structure.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (7)
1. A support changing construction method for an inner support of a foundation pit is characterized by comprising the following steps:
step S1: dividing the foundation pit into a plurality of construction areas through a post-cast strip;
step S2: constructing an inner support structure within one of the construction zones to support the construction zone;
step S3: constructing a main structure in the construction zone;
step S4: in the process of constructing the main body structure, constructing inclined struts obliquely connected to the main body structure and the inner support structure simultaneously;
step S5: after the inclined strut and the main structure meet the design strength, removing the inner support structure in the construction area;
step S6: and transferring the inner support structure to the next construction area, and repeating the steps S2 to S5 until the construction of the foundation pit is completed.
2. The method for constructing a replacement support for an inner support of a foundation pit according to claim 1, wherein the step S2 comprises:
constructing a plurality of vertical column piles in the construction area;
the construction level connect in construction district in a plurality of interior bracing roof beam of a plurality of column pile, the tip of interior bracing roof beam supports in one the inner wall of construction district.
3. The method for constructing a replacement support for an inner support of a foundation pit according to claim 2, wherein the step S3 comprises:
constructing a main body beam which is horizontally arranged and is in cross connection in the construction area, wherein the main body beam is positioned below the inner supporting beam;
constructing a main body column fixed at the bottom of the main body beam;
the construction is laid on the main body plate of the main body beam.
4. The method for constructing a replacement support for an inner support of a foundation pit according to claim 3, wherein the step S4 comprises:
one end of the inclined strut is fixed at the joint of the main beam and the main column, and the other end of the inclined strut is fixed at the intersection of the upright column pile and the inner supporting beam.
5. The method of replacing a support in an excavation as claimed in claim 2, further comprising constructing a multi-layered inner support beam along a height direction of the stud pile.
6. The method of constructing a replacement support for an inner support of a foundation pit according to claim 5,
the method further comprises the step of constructing a multi-layer main structure along the height direction of the upright post pile, wherein each layer of main structure is located below the inner supporting beam of the corresponding layer.
7. The method for constructing a replacement support for an inner support of a foundation pit according to claim 5, wherein the step S4 comprises: and constructing a plurality of inclined struts on the same side of the inner support beam on the same layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110230923.6A CN113006083A (en) | 2021-03-02 | 2021-03-02 | Support changing construction method for foundation pit inner support |
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| CN202110230923.6A CN113006083A (en) | 2021-03-02 | 2021-03-02 | Support changing construction method for foundation pit inner support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411757A (en) * | 2022-02-08 | 2022-04-29 | 中建八局南方建设有限公司 | Construction method of early demolition of inner support zone of deep foundation pit |
Citations (4)
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| CN110409454A (en) * | 2019-08-07 | 2019-11-05 | 上海建工二建集团有限公司 | Block-by-block construction system and method for open foundation pit |
| CN110644499A (en) * | 2019-09-23 | 2020-01-03 | 中天建设集团有限公司 | Construction tool and construction method for asynchronous construction conversion support of foundation pit |
| CN111058455A (en) * | 2019-11-29 | 2020-04-24 | 上海市建工设计研究总院有限公司 | Deep foundation pit supporting structure and deep foundation pit construction method |
| CN111305221A (en) * | 2019-12-09 | 2020-06-19 | 中建四局土木工程有限公司 | Method for replacing inner support of foundation pit |
-
2021
- 2021-03-02 CN CN202110230923.6A patent/CN113006083A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409454A (en) * | 2019-08-07 | 2019-11-05 | 上海建工二建集团有限公司 | Block-by-block construction system and method for open foundation pit |
| CN110644499A (en) * | 2019-09-23 | 2020-01-03 | 中天建设集团有限公司 | Construction tool and construction method for asynchronous construction conversion support of foundation pit |
| CN111058455A (en) * | 2019-11-29 | 2020-04-24 | 上海市建工设计研究总院有限公司 | Deep foundation pit supporting structure and deep foundation pit construction method |
| CN111305221A (en) * | 2019-12-09 | 2020-06-19 | 中建四局土木工程有限公司 | Method for replacing inner support of foundation pit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411757A (en) * | 2022-02-08 | 2022-04-29 | 中建八局南方建设有限公司 | Construction method of early demolition of inner support zone of deep foundation pit |
| CN114411757B (en) * | 2022-02-08 | 2024-09-13 | 中建八局南方建设有限公司 | Construction method of early removal of inner support partitions in deep foundation pit |
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Application publication date: 20210622 |
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