CN117005422A - A construction method for support replacement structure - Google Patents
A construction method for support replacement structure Download PDFInfo
- Publication number
- CN117005422A CN117005422A CN202310793700.XA CN202310793700A CN117005422A CN 117005422 A CN117005422 A CN 117005422A CN 202310793700 A CN202310793700 A CN 202310793700A CN 117005422 A CN117005422 A CN 117005422A
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- China
- Prior art keywords
- steel pipe
- support
- construction
- pipe column
- foundation pit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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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- 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
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a construction method of a support changing structure, which comprises the following steps: s1: based on the foundation pit supporting requirement and the building requirement to be constructed, the position and the stress calculation of the steel pipe column are completed; s2: completing construction of supporting piles at the edge of the foundation pit based on the foundation pit supporting requirement, and completing construction of the steel pipe column at a preset position based on the calculation result of S1; s3: after the construction of the support pile and the steel pipe column is completed, taking soil downwards, and installing a first layer of steel pipe support after taking the soil to a preset depth; s4: continuing to construct downwards, and carrying out steel pipe support construction layer by layer until the excavation of the foundation pit is completed; s5: after the foundation pit is excavated, carrying out force transfer belt construction, and then sequentially carrying out basement cushion layer, waterproof and bottom plate structure construction according to design requirements. The method combines the foundation pit support design and the building structure design, ensures that the steel pipe column can be used as a steel pipe support stress point and can be used as a permanent structural member support structure for construction, constructs the steel pipe column in advance, and is permanently combined, so that the cost is saved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method of a support changing structure.
Background
With the continuous development of cities, in order to achieve the maximum utilization of land, development of underground space is gradually increased in the construction process, so that higher requirements are put forward on foundation pit safety.
The foundation pit support is used as an important means for guaranteeing the safety of underground space operation, different foundation pit depths and different support forms are adopted, and a plurality of reinforced concrete or steel pipe support technologies are adopted for deep foundation pits with complex surrounding environments and inapplicable pile anchor support structure forms. The two support supporting technologies still have great limitations, the construction period of the reinforced concrete support is longer, the construction cost is high, meanwhile, the construction difficulty is high when the concrete support is dismantled, the efficiency is low, a large number of waste concrete blocks can appear along with the dismantling of the support, and the recycling of materials and the treatment of building residues are not facilitated; the steel pipe support is convenient to construct, easy to detach and low in cost, but can only be suitable for foundation pits with smaller longitudinal and transverse distances, and the longer the support length is, the more easily the instability is.
In order to ensure the stability of the foundation pit support, reduce the construction difficulty, improve the construction efficiency and reduce the cost investment, the support construction method of the foundation pit support is provided.
Disclosure of Invention
The invention aims at: in order to overcome the problems in the prior art, the invention discloses a construction method of a support changing structure, which combines foundation pit support design and building structure design, deepens the steel pipe column structure design and stress rechecking, ensures that the steel pipe column can be used as a steel pipe support stress point and can be used as a permanent structural member support structure for construction, constructs the steel pipe column in advance, combines the steel pipe column forever, and saves cost.
The aim of the invention is achieved by the following technical scheme:
the construction method of the support changing structure comprises the following steps:
s1: based on the foundation pit supporting requirement and the building requirement to be constructed, the position and the stress calculation of the steel pipe column are completed;
s2: completing construction of supporting piles at the edge of the foundation pit based on the foundation pit supporting requirement, and completing construction of the steel pipe column at a preset position based on the calculation result of S1;
s3: after the construction of the support pile and the steel pipe column is completed, taking soil downwards, and installing a first layer of steel pipe support after taking the soil to a preset depth;
s4: continuing to construct downwards, and carrying out steel pipe support construction layer by layer until the excavation of the foundation pit is completed;
s5: after the foundation pit is excavated, carrying out force transfer belt construction, and then sequentially carrying out basement cushion layer, waterproof and bottom plate structure construction according to design requirements.
According to a preferred embodiment, in step S1, the steel pipe column is used as both a steel pipe supporting stress point and a building structure supporting building structure as a building structure member by means of steel pipe column position and stress calculation.
According to a preferred embodiment, the steel pipe column construction of step S2 includes: and positioning and paying off the steel pipe column according to a design drawing, pressing the steel pipe into the design elevation by adopting a static pressure method, taking out soil at the contact position of the steel pipe by utilizing a grab or a rotary drilling rig after the steel pipe is pressed down, and pouring concrete to form the steel pipe column.
According to a preferred embodiment, the installation process of the first layer steel pipe support in step S3 includes: and after the soil is taken to a preset depth, a steel bar is planted on the support pile to construct a waist beam, a backing plate and a bracket are welded on the steel pipe column, and after the waist beam meets the strength requirement, the first layer of steel pipe support is installed.
According to a preferred embodiment, step S5 further comprises: the stiffening ring is welded at the position of the steel pipe column extending into the basement bottom plate, so that the connection integrity of the steel pipe column and the underground structure is enhanced, and the aim of partially stopping water is fulfilled.
According to a preferred embodiment, the construction method of the support changing structure further comprises:
s6: after the construction of the bottom plate structure is completed, carrying out upward structural construction;
s7: and constructing the basement structure and the support beam in a layer-by-layer upward mode, dismantling the steel pipe support, and finishing the construction of the basement structure.
According to a preferred embodiment, step S6 further comprises: and when the structural strength of the force transmission belt and the bottom plate reaches 75%, removing the steel pipe support at the bottommost layer, and cutting off the bracket.
According to a preferred embodiment, step S6 further comprises: when the basement structure beam plate is constructed, the support beam is synchronously constructed.
According to a preferred embodiment, steps S6 and S7 further comprise priming the steel pipe column for damage, and after hand sanding, priming.
The foregoing inventive concepts and various further alternatives thereof may be freely combined to form multiple concepts, all of which are contemplated and claimed herein. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The invention has the beneficial effects that:
the method adopts the steel pipe column as a main structural column and a steel pipe support stress member, combines foundation pit support design and building structural design, deepens the steel pipe column structural design and stress rechecking, ensures that the steel pipe column can be used as a steel pipe support stress point and a permanent structural member support structure for construction, constructs the steel pipe column in advance, combines the steel pipe column permanently and saves cost; the steel pipe column is used as a stress point of the steel pipe support, so that the length of the steel pipe support is reduced, the instability risk of the steel pipe support is reduced, and meanwhile, the steel pipe support is adopted, so that the characteristics of convenience in construction, easiness in disassembly and low manufacturing cost are exerted.
Drawings
FIG. 1 is a schematic construction view of a support pile and a steel pipe column according to the present invention;
FIG. 2 is a schematic construction diagram of step S3 of the present invention;
FIG. 3 is a schematic construction diagram of step S4 of the present invention;
FIG. 4 is a schematic construction diagram of step S5 of the present invention;
FIG. 5 is a schematic construction diagram of step S6 of the present invention;
fig. 6 is a construction schematic of step S7 of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, in the present invention, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present invention can be known by those skilled in the art without any creative effort.
Example 1:
the embodiment discloses a construction method of a support changing structure, which comprises the following steps:
1. and the deepened design combines foundation pit support design and building structure design, determines the stress position of the steel pipe support, carries out steel pipe column structural design and stress rechecking, and ensures that the steel pipe column can be used as a stress point of the steel pipe support and also can be used as a support structure of a permanent structural member for construction.
2. And (3) carrying out support pile construction by adopting a rotary drilling rig, carrying out positioning and paying off on the steel pipe column according to a design drawing after the construction of the external support pile is completed, pressing the steel pipe into the design elevation by adopting a static pressure method, continuously checking the perpendicularity of the steel pipe in the process, ensuring the construction precision of the steel pipe column, taking out soil in the steel pipe by utilizing a grab bucket or the rotary drilling rig after the steel pipe is pressed down, and casting concrete to form the steel pipe column, wherein the construction precision is shown in reference to fig. 1.
3. After the construction of the support pile and the steel pipe column is completed, taking soil downwards, planting ribs on the support pile to construct a waist beam after taking the soil to a certain depth, welding a backing plate and a bracket on the steel pipe column, and installing a first layer of steel pipe support after the waist beam meets the strength requirement, wherein the first layer of steel pipe support is shown by referring to fig. 2.
4. And continuing to take earth downwards, and carrying out steel pipe support construction layer by layer until the excavation of the foundation pit is completed, as shown in reference to fig. 3.
5. After the foundation pit is excavated, carrying out construction of a force transmission belt, welding a stiffening ring at the position of the steel pipe column extending into the basement bottom plate, so as to strengthen the connection integrity of the steel pipe column and the underground structure, and simultaneously playing a part of water stopping effect, and then carrying out construction of a basement cushion layer, water resistance and the bottom plate structure according to requirements, as shown in reference to fig. 4.
6. After the construction of the bottom plate structure is completed, the structure construction is continued upwards, when the structural strength of the force transmission belt and the bottom plate reaches 75%, the bottommost steel pipe support can be removed, the bracket is cut off, the damaged primer on the steel pipe column body is manually polished, the thickness of the primer is complemented, and when the basement structure beam plate is constructed, the support beam is synchronously constructed, and the support beam is replaced as shown in reference to fig. 5.
7. And constructing the basement structure and the support beam in a layer-by-layer upward mode, dismantling the steel pipe support until the basement structure construction is completed, and referring to FIG. 6.
The foundation pit supporting and supporting structure consists of supporting piles, steel pipe columns, steel pipe supports, waist beams, corbels, force transmission belts, supporting beam replacement and basement structures. The construction method adopts the steel pipe column as a main structural column and a steel pipe support stress member, combines foundation pit support design and building structural design, deepens the steel pipe column structural design and stress rechecking, ensures that the steel pipe column can be used as a steel pipe support stress point and also can be used as a permanent structural member support structure for construction, and is constructed in advance, combined permanently, and saves cost; the steel pipe column is used as a stress point of the steel pipe support, so that the length of the steel pipe support is reduced, the instability risk of the steel pipe support is reduced, and meanwhile, the steel pipe support is adopted, so that the characteristics of convenience in construction, easiness in disassembly and low manufacturing cost are exerted.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. The construction method of the support changing structure is characterized by comprising the following steps of:
s1: based on the foundation pit supporting requirement and the building requirement to be constructed, the position and the stress calculation of the steel pipe column are completed;
s2: completing construction of supporting piles at the edge of the foundation pit based on the foundation pit supporting requirement, and completing construction of the steel pipe column at a preset position based on the calculation result of S1;
s3: after the construction of the support pile and the steel pipe column is completed, taking soil downwards, and installing a first layer of steel pipe support after taking the soil to a preset depth;
s4: continuing to construct downwards, and carrying out steel pipe support construction layer by layer until the excavation of the foundation pit is completed;
s5: after the foundation pit is excavated, carrying out force transfer belt construction, and then sequentially carrying out basement cushion layer, waterproof and bottom plate structure construction according to design requirements.
2. The method for constructing a support changing structure according to claim 1, wherein in the step S1, the steel pipe column can be used as a steel pipe supporting stress point and a building structure supporting building structure as a building structure member through the position and stress calculation of the steel pipe column.
3. The construction method of the support changing structure according to claim 1, wherein the steel pipe column construction of step S2 includes:
and positioning and paying off the steel pipe column according to a design drawing, pressing the steel pipe into the design elevation by adopting a static pressure method, taking out soil at the contact position of the steel pipe by utilizing a grab or a rotary drilling rig after the steel pipe is pressed down, and pouring concrete to form the steel pipe column.
4. The construction method of a support changing structure according to claim 1, wherein the installation process of the first layer steel pipe support in the step S3 includes:
and after the soil is taken to a preset depth, a steel bar is planted on the support pile to construct a waist beam, a backing plate and a bracket are welded on the steel pipe column, and after the waist beam meets the strength requirement, the first layer of steel pipe support is installed.
5. The method for constructing a support changing structure according to claim 1, wherein step S5 further comprises: the stiffening ring is welded at the position of the steel pipe column extending into the basement bottom plate, so that the connection integrity of the steel pipe column and the underground structure is enhanced, and the aim of partially stopping water is fulfilled.
6. The method of constructing a support change structure according to claim 1, further comprising:
s6: after the construction of the bottom plate structure is completed, carrying out upward structural construction;
s7: and constructing the basement structure and the support beam in a layer-by-layer upward mode, dismantling the steel pipe support, and finishing the construction of the basement structure.
7. The method of constructing a strut-change structure as claimed in claim 6, wherein step S6 further comprises: and when the structural strength of the force transmission belt and the bottom plate reaches 75%, removing the steel pipe support at the bottommost layer, and cutting off the bracket.
8. The method of constructing a support change structure according to claim 7, wherein step S6 further comprises: when the basement structure beam plate is constructed, the support beam is synchronously constructed.
9. The method of constructing a support change structure according to claim 8, wherein steps S6 and S7 further comprise applying a primer to the damaged steel pipe column, and manually polishing the steel pipe column to make up the primer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310793700.XA CN117005422A (en) | 2023-06-30 | 2023-06-30 | A construction method for support replacement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310793700.XA CN117005422A (en) | 2023-06-30 | 2023-06-30 | A construction method for support replacement structure |
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| Publication Number | Publication Date |
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| CN117005422A true CN117005422A (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310793700.XA Pending CN117005422A (en) | 2023-06-30 | 2023-06-30 | A construction method for support replacement structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000355941A (en) * | 1999-06-16 | 2000-12-26 | Shimizu Corp | Building and its construction method |
| CN109610473A (en) * | 2018-12-26 | 2019-04-12 | 福建建中建设科技股份有限公司 | A kind of construction method of the large-scale pool structure foundation pit supporting system of municipal administration |
| CN110397043A (en) * | 2019-07-18 | 2019-11-01 | 中国建筑第四工程局有限公司 | A three-in-one method of foundation pit support internal support system and basement structure system |
| CN111424676A (en) * | 2020-03-31 | 2020-07-17 | 中国一冶集团有限公司 | Main frame beam support changing structure and construction method |
| WO2021023246A1 (en) * | 2019-08-07 | 2021-02-11 | 上海建工二建集团有限公司 | Open foundation pit block construction system and method |
| CN115679981A (en) * | 2022-10-04 | 2023-02-03 | 上海申元岩土工程有限公司 | Vertical supporting structure of combination formula steel pipe under support and landing stage load |
-
2023
- 2023-06-30 CN CN202310793700.XA patent/CN117005422A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000355941A (en) * | 1999-06-16 | 2000-12-26 | Shimizu Corp | Building and its construction method |
| CN109610473A (en) * | 2018-12-26 | 2019-04-12 | 福建建中建设科技股份有限公司 | A kind of construction method of the large-scale pool structure foundation pit supporting system of municipal administration |
| CN110397043A (en) * | 2019-07-18 | 2019-11-01 | 中国建筑第四工程局有限公司 | A three-in-one method of foundation pit support internal support system and basement structure system |
| WO2021023246A1 (en) * | 2019-08-07 | 2021-02-11 | 上海建工二建集团有限公司 | Open foundation pit block construction system and method |
| CN111424676A (en) * | 2020-03-31 | 2020-07-17 | 中国一冶集团有限公司 | Main frame beam support changing structure and construction method |
| CN115679981A (en) * | 2022-10-04 | 2023-02-03 | 上海申元岩土工程有限公司 | Vertical supporting structure of combination formula steel pipe under support and landing stage load |
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