CN113373935A - Foundation pit bottom plate force transmission structure and construction method thereof - Google Patents
Foundation pit bottom plate force transmission structure and construction method thereof Download PDFInfo
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- CN113373935A CN113373935A CN202110487665.XA CN202110487665A CN113373935A CN 113373935 A CN113373935 A CN 113373935A CN 202110487665 A CN202110487665 A CN 202110487665A CN 113373935 A CN113373935 A CN 113373935A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 73
- 238000010276 construction Methods 0.000 title abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000007774 longterm Effects 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 9
- 239000002689 soil Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
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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
Abstract
The invention provides a foundation pit bottom plate force transmission structure and a construction method thereof, aiming at enhancing the pressure resistance of a foundation pit and ensuring the safety of the foundation pit and surrounding buildings in the foundation pit construction process. The technical scheme of the foundation pit bottom plate force transmission structure is as follows: the device comprises a force transmission section bottom plate arranged on the side part of a main bottom plate of a newly-built foundation pit and a downward-turning bracket arranged in the bottom of the newly-built foundation pit; the side part of the force transmission section bottom plate is connected with the side part of the main bottom plate, the bottom of the force transmission section bottom plate is connected with the upper part of the downward turning bracket, and the side part of the downward turning bracket is connected with a temporary enclosure wall inserted into the bottom of the newly-built foundation pit.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a foundation pit bottom plate force transmission structure and a construction method thereof.
Background
In order to ensure the safety of the foundation pit and the surrounding buildings, a building enclosure structure, such as a counter support at the top of the foundation pit, is arranged on the foundation pit in the construction process of the foundation pit. The opposite supports are arranged between the enclosure walls on the two sides of the foundation pit, so that the pressure resistance of the enclosure walls can be enhanced, and the foundation pit is prevented from deforming.
However, when the position of the newly-built foundation pit is close to other existing foundation pits, the enclosure wall close to one side of the existing foundation pit in the newly-built foundation pit needs to be removed in the construction process. At this moment, the counter strut can lose the fulcrum, and the counter strut cannot continue to bear the task of preventing the deformation of the foundation pit, so that the hidden danger is brought to the construction of the foundation pit.
Disclosure of Invention
The invention provides a foundation pit bottom plate force transmission structure and a construction method thereof, aiming at enhancing the pressure resistance of a foundation pit and ensuring the safety of the foundation pit and surrounding buildings in the foundation pit construction process.
The technical scheme of the foundation pit bottom plate force transmission structure is as follows:
a foundation pit bottom plate force transmission structure comprises a force transmission section bottom plate arranged on the side part of a main bottom plate of a newly-built foundation pit and a downward-turning bracket arranged in the bottom of the newly-built foundation pit; the side part of the force transmission section bottom plate is connected with the side part of the main bottom plate, the bottom of the force transmission section bottom plate is connected with the upper part of the downward turning bracket, and the side part of the downward turning bracket is connected with a temporary enclosure wall inserted into the bottom of the newly-built foundation pit.
According to the foundation pit bottom plate force transmission structure, a long-term enclosure wall, a temporary enclosure wall and a main bottom plate are connected into a whole, so that support is provided for a foundation pit. Turning over the bracket down and setting up in newly-built foundation ditch bottom to be connected with interim enclosure wall, demolish to newly-built foundation ditch bottom position at interim enclosure wall like this, can not install under the condition to propping, foundation ditch bottom plate force transmission structure also can conduct the soil pressure that long-term enclosure wall received to interim enclosure wall, has alleviateed the pressure of long-term enclosure wall, has played the compressive capacity of reinforcing foundation ditch, guarantees foundation ditch construction in-process foundation ditch and the effect of building safety on every side. In addition, the force transmission section bottom plate arranged between the main bottom plate and the downward turning bracket can ensure that the construction of the main bottom plate and the downward turning bracket cannot be influenced mutually, thereby improving the construction efficiency.
Further, among the foundation ditch bottom plate biography force structure, turn over the inside bracket biography power reinforcing bar that sets up of bracket down, bracket biography power reinforcing bar exposes down the reinforcing bar section of turning over the bracket and the contained angle of newly-built foundation ditch bottom to be the acute angle, and the directional main bottom plate direction of its tip, turn over the bracket down and pass power reinforcing bar and pass power section bottom plate through the bracket and be connected. The bracket force transmission steel bar can convert part of bearing force into downward pressure, so that the connection strength of the downward-turning bracket and the bottom of the newly-built foundation pit is increased, the transverse pressure of the downward-turning bracket is reduced, and the pressure resistance of the foundation pit support structure is improved.
Further, among the foundation ditch bottom plate force transmission structure, in order to increase force transmission structure's stability, the wall lateral part that encloses temporarily sets up the wall reinforcing bar that encloses temporarily, the wall reinforcing bar that encloses temporarily passes force with the bracket and passes force the reinforcing bar connection.
Further, in the foundation ditch bottom plate biography power structure, biography power section bottom plate includes the bottom plate piecemeal that sets gradually along main bottom plate extending direction, and adjacent bottom plate piecemeal interconnect inserts newly-built foundation ditch bottom after the engineering stake passes the bottom plate piecemeal, is fixed in newly-built foundation ditch bottom with the bottom plate piecemeal. Under the condition that some construction time limits exist, the bottom plate of the force transmission section cannot be constructed at one time. The bottom plate of the force transmission section is decomposed into the bottom plate blocks, so that the construction task can be decomposed, and the construction of the bottom plate of the whole force transmission section is completed step by step within limited time. The engineering pile can further improve the pressure resistance of the foundation pit support structure.
The invention also provides a construction method of the foundation pit bottom plate force transmission structure, which comprises the following steps:
s1, constructing a newly-built foundation pit on one side of the existing foundation pit, arranging a long-term enclosure wall of the newly-built foundation pit on the side part, far away from the existing foundation pit, of the newly-built foundation pit, and arranging a temporary enclosure wall of the newly-built foundation pit on the side part, near the existing foundation pit, of the newly-built foundation pit;
s2, newly building a foundation pit for excavation, and arranging a counter brace between the long-term enclosure wall and the temporary enclosure wall;
s3, constructing a main bottom plate at the bottom of the newly-built foundation pit, and reserving a space for constructing a downward turning bracket;
s4, constructing a downward turning bracket, wherein one end of the downward turning bracket is connected with the temporary enclosure wall;
s5, constructing a force transmission section bottom plate, and connecting the temporary enclosure wall and the main bottom plate through a downward turning bracket and the force transmission section bottom plate;
s6, after meeting the supporting requirement, dismantling the counter support;
s7, removing the temporary enclosure wall to the bottom of the newly-built foundation pit;
and S8, constructing a post-pouring section bottom plate, and connecting the post-pouring section bottom plate with the existing foundation pit into a whole.
According to the construction method of the foundation pit bottom plate force transmission structure, the long-term enclosure wall, the temporary enclosure wall and the main bottom plate are connected into a whole to provide support for the foundation pit. Turning over the bracket down and setting up in newly-built foundation ditch bottom to be connected with interim enclosure wall, demolish to newly-built foundation ditch bottom position at interim enclosure wall like this, can not install under the condition to propping, foundation ditch bottom plate force transmission structure also can conduct the soil pressure that long-term enclosure wall received to interim enclosure wall, has alleviateed the pressure of long-term enclosure wall, has played the compressive capacity of reinforcing foundation ditch, guarantees foundation ditch construction in-process foundation ditch and the effect of building safety on every side. In addition, the force transmission section bottom plate arranged between the main bottom plate and the downward turning bracket can ensure that the construction of the main bottom plate and the downward turning bracket cannot be influenced mutually, thereby improving the construction efficiency.
Drawings
FIG. 1 is a schematic view of a foundation pit floor force transfer structure of the present invention;
FIG. 2 is a top view of a foundation pit floor force transfer structure of the present invention;
fig. 3 is a schematic view of a construction method of a foundation pit bottom plate force transmission structure of the invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example 1:
referring to fig. 1 to 3, the present embodiment provides a foundation pit floor force transmission structure, which includes a force transmission section floor 1 arranged at the side of a main floor a1 of a newly-built foundation pit a, and a downward-turning corbel 2 arranged in the bottom of the newly-built foundation pit a; the side part of the force transmission section bottom plate 1 is connected with the side part of the main bottom plate a1, the bottom of the force transmission section bottom plate 1 is connected with the upper part of the downward turning bracket 2, and the side part of the downward turning bracket 2 is connected with a temporary enclosure wall a2 inserted into the bottom of a newly-built foundation pit a.
According to the foundation pit bottom plate force transmission structure, the long-term enclosure wall a3, the temporary enclosure wall a2 and the main bottom plate a1 are connected into a whole, and support is provided for a foundation pit. The downward-turning bracket 2 is arranged in the bottom of a newly-built foundation pit a and is connected with a temporary enclosure wall a2, so that the temporary enclosure wall a2 is dismantled to the bottom of the newly-built foundation pit a, and under the condition that the diagonal brace c cannot be installed, the foundation pit bottom plate force transmission structure can also transmit the soil pressure borne by the long-term enclosure wall a3 to the temporary enclosure wall a2, so that the pressure of the long-term enclosure wall a3 is reduced, the pressure resistance of the foundation pit is enhanced, and the safety of the foundation pit and surrounding buildings in the foundation pit construction process is ensured. In addition, the force transmission section bottom plate 1 arranged between the main bottom plate a1 and the downward turning bracket 2 can ensure that the construction of the main bottom plate a1 and the downward turning bracket 2 cannot be influenced mutually, thereby improving the construction efficiency.
In a preferable embodiment, in the foundation pit bottom plate force transmission structure, a bracket force transmission steel bar 21 is arranged inside the downward-turning bracket 2, an included angle between a steel bar section of the downward-turning bracket 2 exposed by the bracket force transmission steel bar 21 and the bottom of the newly-built foundation pit a is an acute angle, the end part of the downward-turning bracket 2 points to the direction of the main bottom plate a1, and the downward-turning bracket 2 is connected with the force transmission section bottom plate 1 through the bracket force transmission steel bar 21. The bracket force transmission steel bar 21 can convert part of bearing force into downward pressure, so that the connection strength of the downward-turning bracket 2 and the bottom of the newly-built foundation pit a is increased, the transverse pressure of the downward-turning bracket 2 is reduced, and the pressure resistance of the foundation pit support structure is improved.
In a preferable embodiment, in the foundation pit floor force transmission structure, in order to increase the stability of the force transmission structure, temporary enclosure wall reinforcements a21 are arranged at the side of the temporary enclosure wall a2, and the temporary enclosure wall reinforcements a21 are connected with the bracket force transmission reinforcements 21.
In a preferred embodiment, in the foundation pit floor force transmission structure, the force transmission section floor 1 comprises floor partitions 11 sequentially arranged along the extending direction of the main floor a1, adjacent floor partitions 11 are connected with each other, the engineering piles 3 penetrate through the floor partitions 11 and then are inserted into the bottom of the newly-built foundation pit a, and the floor partitions 11 are fixed at the bottom of the newly-built foundation pit a. Under some conditions with construction time limitation, the bottom plate 1 of the force transmission section cannot be constructed at one time. The bottom plate 1 of the force transmission section is decomposed into the bottom plate blocks 11, so that the construction task can be decomposed, and the construction of the bottom plate 1 of the whole force transmission section is completed step by step within limited time. The engineering pile 3 can further improve the pressure resistance of the foundation pit support structure.
Example 2:
referring to fig. 1 to 3, the present embodiment provides a construction method of a foundation pit floor force transmission structure according to embodiment 1, including the following steps:
s1, constructing a newly-built foundation pit a on one side of the existing foundation pit b, arranging a long-term enclosure wall a3 of the newly-built foundation pit a at the side part of the newly-built foundation pit a far away from the existing foundation pit b, and arranging a temporary enclosure wall a2 of the newly-built foundation pit a at the side part of the newly-built foundation pit a close to the existing foundation pit b;
s2, newly building a foundation pit a for excavation, and arranging a counter brace c between the long-term enclosure wall 1 and the temporary enclosure wall 2;
s3, constructing a main bottom plate a1 at the bottom of the newly-built foundation pit a, and reserving a space for constructing a downward turning bracket 2;
s4, constructing a downward turning bracket 2, wherein one end of the downward turning bracket 2 is connected with a temporary enclosure wall a 2;
s5, constructing a force transmission section bottom plate 1, and connecting a temporary enclosure wall a2 and a main bottom plate a1 through a downward turning bracket 2 and the force transmission section bottom plate 1;
s6, after the requirement of supporting is met, the counter stay c is removed;
s7, removing the temporary enclosure wall a2 to the bottom of the newly-built foundation pit a;
and S8, constructing a post-pouring section bottom plate d, and connecting the post-pouring section bottom plate d with the existing foundation pit b into a whole.
In the construction method of the foundation pit bottom plate force transmission structure of the embodiment, the long-term enclosure wall a3, the temporary enclosure wall a2 and the main bottom plate a1 are connected into a whole to provide support for the foundation pit. The downward-turning bracket 2 is arranged in the bottom of a newly-built foundation pit a and is connected with a temporary enclosure wall a2, so that the temporary enclosure wall a2 is dismantled to the bottom of the newly-built foundation pit a, and under the condition that the diagonal brace c cannot be installed, the foundation pit bottom plate force transmission structure can also transmit the soil pressure borne by the long-term enclosure wall a3 to the temporary enclosure wall a2, so that the pressure of the long-term enclosure wall a3 is reduced, the pressure resistance of the foundation pit is enhanced, and the safety of the foundation pit and surrounding buildings in the foundation pit construction process is ensured. In addition, the force transmission section bottom plate 1 arranged between the main bottom plate a1 and the downward turning bracket 2 can ensure that the construction of the main bottom plate a1 and the downward turning bracket 2 cannot be influenced mutually, thereby improving the construction efficiency.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (5)
1. A foundation pit bottom plate force transmission structure is characterized by comprising a force transmission section bottom plate (1) arranged on the side part of a main bottom plate (a1) of a newly-built foundation pit (a) and a downward-turning bracket (2) arranged in the bottom of the newly-built foundation pit (a); the side part of the force transmission section bottom plate (1) is connected with the side part of the main bottom plate (a1), the bottom of the force transmission section bottom plate (1) is connected with the upper part of the downward turning bracket (2), and the side part of the downward turning bracket (2) is connected with a temporary enclosure wall (a2) inserted into the bottom of a newly-built foundation pit (a).
2. The foundation pit bottom plate force transmission structure according to claim 1, wherein a bracket force transmission steel bar (21) is arranged in the downward-turning bracket (2), the angle between the steel bar section of the bracket force transmission steel bar (21) exposed out of the downward-turning bracket (2) and the bottom of the newly-built foundation pit (a) is an acute angle, the end part of the bracket force transmission steel bar is directed to the main bottom plate (a1), and the downward-turning bracket (2) is connected with the force transmission section bottom plate (1) through the bracket force transmission steel bar (21).
3. A foundation pit floor force transmission structure according to claim 2, wherein the side of the temporary enclosure wall (a2) is provided with temporary enclosure wall steel bars (a21), and the temporary enclosure wall steel bars (a21) are connected with the bracket force transmission steel bars (21).
4. The foundation pit floor force transmission structure according to claim 1, wherein the force transmission section floor (1) comprises floor partitions (11) arranged in sequence along the extension direction of the main floor (a1), adjacent floor partitions (11) are connected with each other, and the engineering pile (3) penetrates through the floor partitions (11) and then is inserted into the bottom of the newly-built foundation pit (a) to fix the floor partitions (11) to the bottom of the newly-built foundation pit (a).
5. A method of constructing a foundation pit floor force transfer structure as claimed in any one of claims 1 to 4, comprising the steps of:
s1, constructing a newly-built foundation pit (a) on one side of the existing foundation pit (b), arranging a long-term enclosure wall (a3) of the newly-built foundation pit (a) at the side part of the newly-built foundation pit (a) far away from the existing foundation pit (b), and arranging a temporary enclosure wall (a2) of the newly-built foundation pit (a) at the side part of the newly-built foundation pit (a) near the existing foundation pit (b);
s2, newly building a foundation pit (a), excavating, and arranging a counter brace (c) between the long-term enclosure wall (1) and the temporary enclosure wall (2);
s3, constructing a main bottom plate (a1) at the bottom of the newly-built foundation pit (a), and reserving a space for constructing a downward turning bracket (2);
s4, constructing a downward turning bracket (2), wherein one end of the downward turning bracket (2) is connected with a temporary enclosure wall (a 2);
s5, constructing a force transmission section bottom plate (1), and connecting a temporary enclosure wall (a2) and a main bottom plate (a1) through a downward turning bracket (2) and the force transmission section bottom plate (1);
s6, after the requirement of supporting is met, the counter stay (c) is removed;
s7, removing the temporary enclosure wall (a2) to the bottom of the newly-built foundation pit (a);
and S8, constructing a post-pouring section bottom plate (d), and connecting the post-pouring section bottom plate (d) with the existing foundation pit (b) into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487665.XA CN113373935A (en) | 2021-05-06 | 2021-05-06 | Foundation pit bottom plate force transmission structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487665.XA CN113373935A (en) | 2021-05-06 | 2021-05-06 | Foundation pit bottom plate force transmission structure and construction method thereof |
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| CN113373935A true CN113373935A (en) | 2021-09-10 |
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| CN202110487665.XA Pending CN113373935A (en) | 2021-05-06 | 2021-05-06 | Foundation pit bottom plate force transmission structure and construction method thereof |
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Citations (3)
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| KR20100118482A (en) * | 2009-04-28 | 2010-11-05 | (주)씨엠파트너스건축사사무소 | To use reclamation steel perimeter beam and slab diaphragm effect in order for one side of the basement outer wall continuous construct was possible ,which the basement infrastructure construction method |
| CN104975606A (en) * | 2015-06-29 | 2015-10-14 | 上海市基础工程集团有限公司 | Method for handling high-low strides at adjacent parts of reverse building foundation pit and adjacent foundation pit |
| CN113174962A (en) * | 2021-04-22 | 2021-07-27 | 上海建工集团股份有限公司 | Foundation pit bottom plate force transmission structure and construction method thereof |
-
2021
- 2021-05-06 CN CN202110487665.XA patent/CN113373935A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100118482A (en) * | 2009-04-28 | 2010-11-05 | (주)씨엠파트너스건축사사무소 | To use reclamation steel perimeter beam and slab diaphragm effect in order for one side of the basement outer wall continuous construct was possible ,which the basement infrastructure construction method |
| CN104975606A (en) * | 2015-06-29 | 2015-10-14 | 上海市基础工程集团有限公司 | Method for handling high-low strides at adjacent parts of reverse building foundation pit and adjacent foundation pit |
| CN113174962A (en) * | 2021-04-22 | 2021-07-27 | 上海建工集团股份有限公司 | Foundation pit bottom plate force transmission structure and construction method thereof |
Non-Patent Citations (3)
| Title |
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| 何国建等: "在运营地铁隧道正上方的深基坑土方开挖施工技术", 《建筑施工》 * |
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Application publication date: 20210910 |
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