CN113216205A - Partition wall support conversion method in deep foundation pit and foundation pit dividing construction - Google Patents
Partition wall support conversion method in deep foundation pit and foundation pit dividing construction Download PDFInfo
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- CN113216205A CN113216205A CN202110500897.4A CN202110500897A CN113216205A CN 113216205 A CN113216205 A CN 113216205A CN 202110500897 A CN202110500897 A CN 202110500897A CN 113216205 A CN113216205 A CN 113216205A
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- foundation pit
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a partition wall support conversion method in deep foundation pit dividing construction, which comprises the following steps of firstly dividing a deep foundation pit into a plurality of construction areas; excavating a soil body and arranging an inner support on one of the soil bodies, constructing a bottom plate structure and arranging support-changing section steel, removing the inner support and constructing an underground structure layer by layer; then excavating an area adjacent to the deep foundation pit formed by excavation; installing support-changing section steel, removing an upper inner support, forming a through hole on the intermediate wall, and when constructing an underground structure layer by layer, connecting a structural beam of a back-excavated deep foundation pit with a corresponding structural beam in a front deep foundation pit by penetrating the intermediate wall through the through hole to form a support-changing structural beam, and canceling the arrangement of the support-changing section steel of the back-excavated deep foundation pit; dismantling the intermediate wall between the two deep foundation pits layer by layer from top to bottom, and forming an integral structure by the plate; compared with the prior art, the arrangement of section steel support replacement of adjacent areas is cancelled; the defects that materials are wasted, stress is unstable, and the transmission of forces on two sides cannot be guaranteed in the underground wall dismantling process are overcome.
Description
Technical Field
The invention belongs to the technical field of civil construction, and particularly relates to a partition wall support conversion method in deep foundation pit division construction.
Background
In the deep foundation pit enclosure design and construction, when the area of a foundation pit is large or the surrounding geological environment is complex and needs to be constructed separately, an enclosure wall body is arranged between pits, in order to control the deformation of the foundation pit, in the underground structure at two sides of a middle partition wall, after the replacement support section steel needs to be arranged layer by layer in the underground structure from bottom to top, an enclosure inner support can be removed, and the underground structure construction is completed; and after the underground structures of the two adjacent foundation pits are constructed, the enclosure of the intermediate walls is dismantled layer by layer from top to bottom, and the structures are connected to form an integral stable structure. In the prior art, structural steel supports are required to be arranged in the construction process of structures on two sides of an intermediate wall to be connected with the intermediate wall to form a change support, so that the defects of material waste, unstable stress, incapability of guaranteeing the transmission of forces on two sides in the process of dismantling the underground intermediate wall and the like exist. Therefore, the existing technologies are not perfect enough and are expected to be further improved.
Disclosure of Invention
The invention aims to provide a partition wall support conversion method in deep foundation pit and foundation pit division construction.
The purpose of the invention can be realized by the following technical scheme:
a partition wall support conversion method in deep foundation pit division foundation pit construction comprises the following steps:
the method comprises the following steps that firstly, a deep foundation pit is divided into a plurality of construction areas through an intermediate wall;
after the construction of the deep foundation pit waterproof curtain, the building enclosure and the crown beam is finished, performing layer-by-layer soil excavation and inner support arrangement on one area, constructing a bottom plate structure and arranging support-changing section steel, removing the inner supports and constructing an underground structure layer by layer;
thirdly, excavating an area adjacent to the deep foundation pit formed by excavating according to the construction method in the second step;
fourthly, after the bottom plate structure of the deep foundation pit adjacent to the middle deep foundation pit in the third step is constructed, the support-changing section steel is installed, the upper inner support is removed, a through hole is formed in the middle partition wall and is positioned at the position of the floor beam of the underground structure of the deep foundation pit in the two areas, when the underground structure is constructed layer by layer, the structural beam of the later-excavated deep foundation pit penetrates through the middle partition wall through the through hole to be connected with the corresponding structural beam in the previous deep foundation pit, the support-changing structural beam is formed, and the arrangement of the support-changing section steel of the later-excavated deep foundation pit is cancelled;
fifthly, removing the intermediate walls between the two deep foundation pits layer by layer from top to bottom, and connecting the floor plates of the two deep foundation pits to form an integral structure;
and sixthly, continuing to perform the third step to the fifth step until the construction of the deep foundation pit is finished.
As a further scheme of the invention, the underground structure in the first step comprises a concrete bottom plate structure, a wall column and a beam slab structure which are constructed by foundation pits.
As a further scheme of the invention, the support-changing section steel is in a structure that end plates are welded at two ends of H-shaped steel, and the support-changing section steel is arranged in a bottom plate or a structural floor according to a preset interval and is connected with the intermediate wall to form a support change.
As a further scheme of the invention, the intermediate wall is a retaining wall between adjacent foundation pits when the foundation pits of the deep foundation pit are constructed.
As a further scheme of the invention, the intermediate wall is a row pile or a ground connecting wall.
As a further scheme of the invention, when the intermediate wall divides the deep foundation pit into A, B two construction areas, the method comprises the following steps:
firstly, after construction of a deep foundation pit waterproof curtain, a building enclosure and a crown beam is finished, firstly excavating soil bodies in an area A layer by layer and arranging an inner support, then constructing a bottom plate structure and arranging support-changing section steel, dismantling the inner support and constructing an underground structure layer by layer;
secondly, constructing a B area according to the steps of the A area;
thirdly, after the construction of the bottom plate structure of the area B is finished, installing support-changing section steel, removing an upper inner support, forming a through hole on the middle partition wall, wherein the through hole is positioned at the beam part of the underground structure floor of the area A and the area B;
and fourthly, removing the intermediate walls layer by layer from top to bottom, and connecting the floor plates in the area A and the area B to form an integral structure.
The invention has the beneficial effects that:
compared with the prior art, the method has the advantages that holes are formed in the middle partition wall and are located at the beam parts of the underground structural floors in the areas A and B, when the underground structure is constructed layer by layer, the structural beams in the areas B penetrate through the middle partition wall and are connected with the structural beams corresponding to the areas A, the support change is formed, and the arrangement of section steel support change in the areas B is cancelled; the invention avoids the defects of material waste, unstable stress, incapability of ensuring the transmission of forces on two sides in the process of dismantling the underground wall and the like.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a construction schematic diagram of a partition wall support conversion method in deep foundation pit division construction;
fig. 2 is another construction schematic diagram of the partition wall support conversion method in the deep foundation pit and sub-foundation pit construction.
Reference numerals: 1. a waterproof curtain of the deep foundation pit; 2. an enclosure structure; 3. an intermediate wall; 4. a crown beam; 5. an underground structure; 7. changing support section steel; 8. a through hole; 9. and replacing the support structure beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for supporting and converting a partition wall in deep foundation pit division construction is shown in figures 1 and 2 and comprises the following steps:
firstly, dividing a deep foundation pit into a plurality of construction areas through an intermediate wall 3;
secondly, after the construction of the deep foundation pit waterproof curtain 1, the building enclosure 2 and the crown beam 4 is finished, performing layer-by-layer soil excavation and inner support arrangement on one area, constructing a bottom plate structure and arranging support-changing section steel 7, removing the inner supports and constructing the underground structure 5 layer by layer;
the underground structure 5 is a concrete bottom plate structure, a wall column and a beam slab structure for foundation pit construction;
the support-changing section steel 7 is an H-shaped steel with a certain section size, two ends of the H-shaped steel are welded with end plates, the end plates are arranged in a bottom plate or a structural floor according to a preset interval and are connected with the intermediate wall 3 to form a support change, and a force transmission effect is achieved;
the intermediate wall 3 is a retaining wall between adjacent foundation pits during foundation pit construction of the deep foundation pit, and is generally a row pile, a diaphragm wall and the like according to the depth of the foundation pit and the surrounding environment;
thirdly, excavating an area adjacent to the deep foundation pit formed by excavating according to the construction method in the second step;
fourthly, after the construction of the bottom plate structure of the deep foundation pit adjacent to the middle deep foundation pit in the third step is finished, the support-changing section steel 7 is installed, the upper inner support is removed, the through hole 8 is formed in the middle partition wall 3, the through hole 8 is located in the position of the underground structural floor beam of the deep foundation pit in the two areas, when the underground structure 5 is constructed layer by layer, the structural beam of the later-excavated deep foundation pit penetrates through the middle partition wall 3 through the through hole 8 to be connected with the corresponding structural beam in the previous deep foundation pit, the support-changing structural beam 9 is formed, and the arrangement of the support-changing section steel 7 of the later-;
and fifthly, removing the intermediate walls 3 between the two deep foundation pits layer by layer from top to bottom, and connecting the floor plates of the two deep foundation pits to form an integral structure.
In one embodiment of the invention, the deep foundation pit is divided into A, B areas, and the specific construction method comprises the following steps:
s1, after the construction of the deep foundation pit waterproof curtain, the enclosure structure and the crown beam is finished, firstly excavating soil bodies in the area A layer by layer and arranging an inner support, then constructing a bottom plate structure and arranging support-changing section steel 7, dismantling the inner support and constructing the underground structure 5 layer by layer;
s2, constructing a B area according to the steps of the A area;
s3, after the construction of the bottom plate structure of the area B is finished, installing support-changing section steel 7, removing an upper inner support, forming a through hole 8 in the intermediate wall 3, wherein the through hole 8 is positioned at the beam part of the underground structure floor in the area A and the area B, when the underground structure 5 is constructed layer by layer, the structural beam in the area B passes through the intermediate wall 3 through the through hole 8 to be connected with the corresponding structural beam in the area A, so that a support-changing structural beam 9 is formed, and the arrangement of the support-changing section steel 7 in the area B is cancelled;
and S4, removing the intermediate walls 3 layer by layer from top to bottom, and connecting the floor plates in the areas A and B to form an integral structure.
Compared with the prior art, the invention has the advantages that the through hole 8 is formed in the middle partition wall, the through hole 8 is positioned at the beam parts of the underground structural floor in the area A and the area B, when the underground structure is constructed layer by layer, the structural beam in the area B passes through the middle partition wall to be connected with the structural beam corresponding to the area A, the support change is formed, and the arrangement of the section steel support change in the area B is cancelled.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (6)
1. A partition wall support conversion method in deep foundation pit division foundation pit construction is characterized by comprising the following steps:
firstly, dividing a deep foundation pit into a plurality of construction areas through an intermediate wall (3);
secondly, after the construction of the deep foundation pit waterproof curtain (1), the building enclosure structure (2) and the crown beam (4) is finished, excavating soil layer by layer and arranging an inner support in one area, constructing a bottom plate structure and arranging support-changing section steel (7), dismantling the inner support and constructing an underground structure (5) layer by layer;
thirdly, excavating an area adjacent to the deep foundation pit formed by excavating according to the construction method in the second step;
fourthly, after the construction of the bottom plate structures of the deep foundation pits in the adjacent areas of the middle deep foundation pit in the third step is finished, the support-changing section steel (7) is installed, the upper inner support is removed, a through hole (8) is formed in the middle partition wall (3), the through hole (8) is located in the underground structure floor beam part of the deep foundation pits in the two areas, and when the underground structure (5) is constructed layer by layer, the structural beam of the later-excavated deep foundation pit penetrates through the middle partition wall (3) through the through hole (8) to be connected with the corresponding structural beam in the previous deep foundation pit, so that a support-changing structural beam (9) is formed;
fifthly, removing the intermediate wall (3) between the two deep foundation pits layer by layer from top to bottom, and connecting floor plates of the two deep foundation pits to form an integral structure;
and sixthly, continuing to perform the third step to the fifth step until the construction of the deep foundation pit is finished.
2. The method for supporting and converting the partition wall in the deep foundation pit and excavation partition construction according to claim 1, wherein the underground structure (5) in the first step comprises a concrete bottom plate structure, a wall column and a beam plate structure in the excavation partition construction.
3. The method for supporting and converting the partition wall in the deep foundation pit division construction according to claim 1, wherein the support-changing section steel (7) is a structure of welding end plates at both ends of H-shaped steel, and the support-changing section steel (7) is arranged in a bottom plate or a structural floor at a preset interval to be connected with the partition wall (3) to form support changing.
4. The method for supporting and converting the intermediate wall in the foundation pit divisional construction of the deep foundation pit according to claim 1, wherein the intermediate wall (3) is a retaining wall between adjacent foundation pits in the foundation pit divisional construction of the deep foundation pit.
5. The method for supporting and converting the intermediate wall in the foundation pit construction of the deep foundation pit according to claim 1, wherein the intermediate wall (3) is a row pile or a diaphragm wall.
6. The method for supporting and converting a partition wall in foundation pit division construction of a deep foundation pit according to claim 4, wherein when the partition wall (3) divides the deep foundation pit into A, B two construction areas, the method comprises the steps of:
firstly, after construction of a deep foundation pit waterproof curtain (1), a building enclosure (2) and a crown beam (4) is finished, firstly excavating soil body layer by layer in an area A and arranging an inner support, then constructing a bottom plate structure and arranging support-changing section steel (7), dismantling the inner support and constructing an underground structure (5) layer by layer;
secondly, constructing a B area according to the steps of the A area;
thirdly, after the construction of the bottom plate structure of the area B is finished, installing support-changing section steel (7), removing an upper inner support, forming a through hole (8) in the intermediate wall (3), wherein the through hole (8) is positioned at the beam part of the underground structure floor of the area A and the area B, and when the underground structure (5) is constructed layer by layer, the structural beam of the area B penetrates through the intermediate wall (3) through the through hole (8) to be connected with the corresponding structural beam of the area A to form a support-changing structural beam (9), and the arrangement of the support-changing section steel (7) of the area B is cancelled;
and fourthly, removing the intermediate walls (3) layer by layer from top to bottom, and connecting the floor plates in the areas A and B to form an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110500897.4A CN113216205A (en) | 2021-05-08 | 2021-05-08 | Partition wall support conversion method in deep foundation pit and foundation pit dividing construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110500897.4A CN113216205A (en) | 2021-05-08 | 2021-05-08 | Partition wall support conversion method in deep foundation pit and foundation pit dividing construction |
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| CN113216205A true CN113216205A (en) | 2021-08-06 |
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| CN202110500897.4A Pending CN113216205A (en) | 2021-05-08 | 2021-05-08 | Partition wall support conversion method in deep foundation pit and foundation pit dividing construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351762A (en) * | 2022-01-26 | 2022-04-15 | 中国建筑第八工程局有限公司 | Construction method for clearly dismantling partition wall in basement re-building stage |
| CN115125960A (en) * | 2022-08-05 | 2022-09-30 | 中建市政工程有限公司 | Common foundation pit excavation method for adjacent foundation pits with different bottom elevations |
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| CN103726494A (en) * | 2013-12-30 | 2014-04-16 | 上海建工二建集团有限公司 | Method for dismantling division wall between foundation pits in semi-reversed construction mode |
| CN105155549A (en) * | 2015-06-18 | 2015-12-16 | 中建三局第二建设工程有限责任公司 | Partition support system for large-area deep foundation pit under forward and backward working condition, and construction method thereof |
| CN106436716A (en) * | 2016-07-08 | 2017-02-22 | 上海建工七建集团有限公司 | Separation wall dismounting method and structure |
| CN107401182A (en) * | 2017-08-29 | 2017-11-28 | 广州宏途设备工程有限公司 | One kind wears dividing wall support changing structure for use and its application method |
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2021
- 2021-05-08 CN CN202110500897.4A patent/CN113216205A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726494A (en) * | 2013-12-30 | 2014-04-16 | 上海建工二建集团有限公司 | Method for dismantling division wall between foundation pits in semi-reversed construction mode |
| CN105155549A (en) * | 2015-06-18 | 2015-12-16 | 中建三局第二建设工程有限责任公司 | Partition support system for large-area deep foundation pit under forward and backward working condition, and construction method thereof |
| CN106436716A (en) * | 2016-07-08 | 2017-02-22 | 上海建工七建集团有限公司 | Separation wall dismounting method and structure |
| CN107401182A (en) * | 2017-08-29 | 2017-11-28 | 广州宏途设备工程有限公司 | One kind wears dividing wall support changing structure for use and its application method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351762A (en) * | 2022-01-26 | 2022-04-15 | 中国建筑第八工程局有限公司 | Construction method for clearly dismantling partition wall in basement re-building stage |
| CN115125960A (en) * | 2022-08-05 | 2022-09-30 | 中建市政工程有限公司 | Common foundation pit excavation method for adjacent foundation pits with different bottom elevations |
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