CN114687358A - Narrow foundation pit foundation reinforcing structure and reinforcing method thereof - Google Patents
Narrow foundation pit foundation reinforcing structure and reinforcing method thereof Download PDFInfo
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- CN114687358A CN114687358A CN202210405598.7A CN202210405598A CN114687358A CN 114687358 A CN114687358 A CN 114687358A CN 202210405598 A CN202210405598 A CN 202210405598A CN 114687358 A CN114687358 A CN 114687358A
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- strut
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 32
- 230000000087 stabilizing effect Effects 0.000 claims description 30
- 238000009434 installation Methods 0.000 claims description 12
- 239000010410 layer Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects 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
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a narrow foundation pit foundation reinforcing structure and a reinforcing method thereof, belonging to the technical field of building construction and foundation treatment.
Description
Technical Field
The invention relates to the technical field of building construction and foundation treatment, in particular to a narrow foundation pit foundation reinforcing structure and a reinforcing method thereof.
Background
In municipal pipeline engineering and urban rail transit engineering, construction space is significantly restricted, and excavation foundation pits are often long and narrow, and the ratio of the width of the foundation pit to the depth of the foundation pit is large. This is in contrast to conventional construction pits, in which the ratio is much greater. The stability of the foundation pit is closely related to the safety of the foundation pit itself and adjacent buildings.
In the prior art, the soil pressure of the base part of the narrow foundation pit is large and easy to bulge, and the supporting columns are extruded in all directions, so that the pit bottom is not stable enough, the construction safety is influenced, the pit bottom reinforcement is an effective method for supporting the foundation pit in a soft soil area, but the special property of the narrow foundation pit is not considered in the structure and construction method form of the pit bottom reinforcement, and the reinforcement structure in the foundation pit is not stable enough.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a narrow foundation pit foundation reinforcing structure and a reinforcing method thereof, which can ensure that the narrow foundation pit foundation is more stable, so that workers can construct more safely.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention has the preferable technical scheme that the device comprises four supporting columns, an oblique supporting column and a transverse supporting column, wherein the four supporting columns are distributed at four corners of a narrow foundation pit ground, and one end of each supporting column is inserted into a soil layer; one end of the oblique strut is fixed at the position of the support column on the soil surface, and the other end of the oblique strut is obliquely arranged downwards and is abutted against the bottom of the support column at the opposite angle; the transverse strut is positioned on the soil surface layer and arranged along the horizontal direction, and two ends of the transverse strut are respectively fixedly connected with the two diagonal supporting columns, so that the oblique strut, the transverse strut and the two diagonal supporting columns form a triangular structure; be provided with the screw rod along vertical direction, the one end of screw rod with the one end fixed connection that the slant pillar is located the soil layer below, the other end and transverse strut sliding connection, just be provided with two nuts on the screw rod and be used for with the transverse strut locking.
The invention has the preferable technical scheme that one end of the inclined strut, which is contacted with the transverse strut, is provided with a connecting plate, and the transverse strut is connected to the inclined strut in a sliding way through the connecting plate; the supporting column and one end of the transverse supporting column in contact are provided with installation adjusting plates, so that the transverse supporting column is connected to the supporting column in a sliding mode.
The invention has the preferable technical scheme that one end of the transverse strut, which is far away from the inclined strut, is provided with a through hole, and the transverse strut and the inclined strut are connected by a screw rod penetrating through the through hole.
The cross stabilizing device preferably comprises two cross stabilizing columns, one end of each cross stabilizing column is fixed on the supporting column which is not in contact with the transverse column and the oblique column, and the other end of each cross stabilizing column is fixed on the transverse column.
The present invention preferably has the technical solution that the contact area of the stabilizing cross pillar against the cross pillar is greater than the contact area of the stabilizing cross pillar against the supporting pillar.
The invention has the preferable technical scheme that one end of the oblique strut, which is far away from the transverse strut, is provided with a butting platform; one end of the screw rod is fixed on the abutting-joint table through a first nut.
The invention preferably adopts the technical scheme that one end of the screw rod, which is in contact with the transverse strut, is provided with a second nut.
The invention has the preferable technical scheme that the length of the screw is greater than that of a right-angle side formed by assembling the oblique strut and the transverse strut.
The invention preferably adopts the technical scheme that the method comprises the following steps: step S00: performing primary excavation on a narrow foundation pit foundation in a construction site; step S10: respectively erecting the four supporting columns at four corners in the ground of the narrow foundation pit; step S20: one of the supporting columns is provided with the installation adjusting plate, one end of the inclined supporting column with the abutting table is fixedly arranged below the installation adjusting plate and abuts against the supporting column, and the other end of the inclined supporting column is fixedly arranged on the other opposite supporting column; step S30: mounting the screw on the abutment table; step S40: filling part of soil in the narrow foundation pit, and temporarily fixing the part of soil covering the oblique support; step S50: installing one end of the transverse strut on the connecting plate of the oblique strut, installing the other end of the transverse strut on the installation adjusting plate on the supporting strut, and penetrating through the screw rod; step S60: filling the remaining soil in the narrow foundation pit, covering the large part of the inclined strut by the soil, and exposing the screw rod part out of the soil; step S70: installing one ends of the two cross stabilizing columns on the other two supporting columns which are not in contact with the oblique supporting column and the transverse supporting column respectively, installing the other ends of the two cross stabilizing columns on the transverse supporting column, and enabling the area of one end of each cross stabilizing column in contact with the transverse supporting column to be larger than the area of one end of each cross stabilizing column in contact with the supporting column.
The invention has the beneficial effects that:
the invention aims to solve the technical problem of providing a narrow foundation pit foundation reinforcing structure and a reinforcing method thereof, wherein the structure comprises four supporting columns, an oblique supporting column and a transverse supporting column, the four supporting columns are distributed at four corners of a narrow foundation pit ground, one end of the oblique supporting column is fixed on the supporting column, the other end of the oblique supporting column is fixed on the opposite supporting column, one end of the transverse supporting column is positioned on the oblique supporting column and is jointly fixed on the supporting column, and the other end of the transverse supporting column is positioned on the opposite supporting column and is positioned above the oblique supporting column, so that the oblique supporting column, the transverse supporting column and the two supporting columns form a triangular structure, the narrow foundation pit foundation can be ensured to be more stable, and workers can construct more safely.
Drawings
Fig. 1 is a schematic structural diagram of a narrow foundation pit foundation reinforcing structure provided in an embodiment of the invention;
FIG. 2 is a schematic view of the overall structure of a narrow foundation pit foundation reinforcing structure provided in an embodiment of the invention;
FIG. 3 is a schematic plan view of a narrow foundation pit foundation reinforcing structure provided in an embodiment of the invention;
in the figure:
1. supporting a pillar; 11. installing an adjusting plate; 2. an oblique strut; 21. a connecting plate; 22. a butting stand; 3. a transverse strut; 4. a screw; 41. a first nut; 42. a second nut; 5. and stabilizing the cross columns.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-3, the reinforcing structure for a foundation of a narrow foundation pit and the reinforcing method thereof provided by the invention comprise four supporting columns 1, an oblique column 2 and a transverse column 3, wherein the four supporting columns 1 are distributed at four corners of the ground of the narrow foundation pit, and one end of each supporting column is inserted into a soil layer; one end of the oblique strut 2 is fixed on the position of the support column 1 on the soil surface, and the other end of the oblique strut 2 is obliquely arranged downwards and is propped against the bottom of the diagonal support column 1; the transverse strut 3 is positioned on the soil surface layer and arranged along the horizontal direction, and two ends of the transverse strut are respectively and fixedly connected with the two diagonal supporting columns 1, so that the oblique strut 2, the transverse strut 3 and the two supporting columns 1 form a triangular structure; be provided with screw rod 4 along vertical direction, the one end fixed connection that the one end and the slant pillar 2 of screw rod 4 are located the soil layer below, the other end and transverse strut 3 sliding connection, and be provided with two nuts on the screw rod 4 and be used for with the locking of transverse strut 3.
Preferably, a connecting plate 21 is arranged at one end of the oblique strut 2, which is in contact with the transverse strut 3, and the transverse strut 3 is slidably connected to the oblique strut 2 through the connecting plate 21; the one end of propping up pillar 1 and the contact of lateral strut 3 disposes installation regulating plate 11 for lateral strut 3 sliding connection is on propping up pillar 1, conveniently adjusts the position relation between lateral strut 3 and the slant pillar 2, prevents to influence the construction because earth is not hard up or the uplift makes prop pillar 1 become unstable enough.
Preferably, a through hole is opened at one end of the transverse strut 3 away from the oblique strut 2, and the transverse strut 3 and the oblique strut 2 are connected by a screw 4 passing through the through hole.
Preferably, two cross stabilizing columns 5 are further included, each cross stabilizing column 5 having one end fixed to the support column 1 not in contact with the lateral support column 3 and the diagonal support column 2, and the other end fixed to the lateral support column 3, increasing the stability of the reinforcement structure.
Preferably, the contact area of the stabilizing cross column 5 against the transverse strut 3 is larger than the contact area of the stabilizing cross column 5 against the support column 1, the stress area is larger, and the deviation is prevented from influencing construction safety and reinforcement.
Preferably, the end of the diagonal strut 2 away from the lateral strut 3 is provided with a butting platform 22; one end of the screw 4 is fixed to the abutment table 22 by a first nut 41.
Preferably, the end of the screw 4 in contact with the transverse strut 3 is provided with a second nut 42.
Preferably, the length of the screw rod 4 is greater than the length of the right-angle side formed by assembling the oblique post 2 and the transverse post 3.
A reinforcing method using a narrow foundation pit foundation reinforcing structure comprises the following steps:
step S00: performing primary excavation on a narrow foundation pit foundation in a construction site; step S10: respectively erecting four supporting columns 1 at four corners in the ground of the narrow foundation pit; finally, the narrow foundation pit is in stroke;
step S20: a groove is formed by obliquely digging downwards the narrow foundation pit foundation along the diagonal direction, the digging amount is minimum, so that one end of the oblique strut 2 is positioned above the soil layer, and the other end of the oblique strut is obliquely laid down to abut against the bottom of the diagonal support strut 1; at the same time, the screw 4 is fixedly mounted on the abutment table 22; the inner wall of the groove can support the oblique supporting column 2 stably, the oblique supporting column 2 arranged obliquely connects the diagonal supporting columns 1 to form a whole, acting force is provided between the oblique supporting column 2 and the diagonal supporting columns, and therefore the supporting columns 1 are not prone to inclination.
Step S30: installing a transverse strut 3, connecting two ends of the transverse strut 3 with the diagonal support columns 1 through screws respectively, and adjusting the installation position through waist-shaped holes arranged on an installation adjusting plate 11 and a connecting plate 21; step S40: the other end of the screw rod 4 penetrates through the transverse strut 3 and is locked by mounting nuts on the upper side and the lower side;
step S50: two cross stabilizing columns 5 are installed along the horizontal direction, one ends of the cross stabilizing columns are respectively fixed on the other two supporting columns 1, and the other ends of the cross stabilizing columns are fixed on two sides of the transverse supporting column 3; four support posts 1 are connected to form a whole.
Step S60: the positions of the two nuts are adjusted, so that the screw rod 4 is in a tensioned state; at this time, the abutting table 22 is in close contact with the supporting column 1, and simultaneously, a downward acting force is applied to one end of the transverse strut 3, and simultaneously, the bolt fixed to the end of the transverse strut 3 is adjusted, so that the end moves downwards slightly, and the transverse strut 3 applies a downward acting force to the transverse stabilizing column 5; the adjusting screw rod 4 is tensioned to solve the problem that the abutting table 22 at the bottom of the groove is inconvenient to fix, and in the other direction, the adjusting screw rod can provide horizontal repulsive component force for the two supporting columns 1 at opposite angles, so that the supporting columns 1 and the supporting columns have a far-away movement trend, the acting force can well resist soil layer pressure given by soil, and the stability of the supporting columns 1 is guaranteed. Meanwhile, the transverse strut 3 and the cross stabilizing column 5 apply downward acting force to the soil, so that the acting force of soil layer uplift can be resisted well. And the horizontal pressure of soil and the pressure of vertical direction can restrict each other, and lateral pressure can transmit the butt platform 22 for oblique pillar 2, because the butt platform is not fixed, it can realize the skew and drag to exert the effort for horizontal pillar through the screw rod, thereby form the effect of restriction each other, soil layer stability is better.
Step S70: backfilling the groove provided with the oblique strut 2; the remaining soil is filled in the narrow foundation pit ground, so that the soil is buried in the transverse strut 3, the stability of the oblique strut 2 can be maintained by the acting force of the soil, the oblique strut 2 is connected with the supporting strut 1, and the whole soil layer below the oblique strut can be used as a base structure of the frame, so that the oblique strut is more stable and firm.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (8)
1. The utility model provides a narrow foundation ditch foundation reinforcement structure which characterized in that:
the foundation pit supporting structure comprises four supporting columns (1), an oblique supporting column (2) and a transverse supporting column (3), wherein the four supporting columns (1) are distributed at four corners of a narrow foundation pit ground, and one end of each supporting column is inserted into a soil layer;
one end of the oblique strut (2) is fixed on the position, located on the soil surface, of the supporting column (1), and the other end of the oblique strut (2) is obliquely arranged downwards and abuts against the bottom of the supporting column (1) at the opposite angle;
the transverse strut (3) is positioned on the soil surface layer and arranged along the horizontal direction, and two ends of the transverse strut are respectively and fixedly connected with the two diagonal supporting columns (1), so that the oblique strut (2), the transverse strut (3) and the two supporting columns (1) form a triangular structure;
be provided with screw rod (4) along vertical direction, the one end of screw rod (4) with slant pillar (2) are located the one end fixed connection of soil layer below, the other end and transverse strut (3) sliding connection, just be provided with two nuts on screw rod (4) and be used for with transverse strut (3) locking.
2. The narrow foundation pit foundation reinforcement structure of claim 1, wherein:
a connecting plate (21) is arranged at one end, fixed with the oblique strut (2), of the oblique strut (2), a waist-shaped hole is formed in the connecting plate (21), and the installation position of the oblique strut (2) on the support column (1) is adjusted through the waist-shaped hole;
transverse strut (3) with the one end that props up post (1) fixed is configured with installation regulating plate (11), the transverse strut (3) other end with connecting plate (21) fixed connection, installation regulating plate (11) are provided with waist type hole and make transverse strut (3) are adjusted and are installed position on propping up post (1).
3. The narrow foundation pit foundation reinforcement structure of claim 2, wherein:
the cross stabilizing device is characterized by further comprising two cross stabilizing columns (5), wherein one end of each cross stabilizing column (5) is fixed on the supporting column (1) which is not in contact with the transverse supporting column (3) and the oblique supporting column (2), and the other end of each cross stabilizing column is fixed on the transverse supporting column (3).
4. The narrow foundation pit foundation reinforcement structure of claim 3, wherein:
the contact area of the cross stabilizing columns (5) against the transverse strut (3) is larger than the contact area of the cross stabilizing columns (5) against the supporting column (1).
5. The narrow foundation pit foundation reinforcement structure of claim 4, wherein:
one end of the oblique strut (2) far away from the transverse strut (3) is provided with a butting platform (22);
one end of the screw rod (4) is fixed on the abutting-joint platform (22) through a first nut (41).
6. The narrow foundation pit foundation reinforcement structure of claim 5, wherein:
and two second nuts (42) are arranged at one end of the screw rod (4) which is in contact with the transverse strut (3).
7. The narrow foundation pit foundation reinforcement structure of claim 6, wherein:
the length of the screw rod (4) is greater than that of a right-angle side formed after the oblique strut (2) and the transverse strut (3) are assembled.
8. A reinforcing method using the narrow foundation pit foundation reinforcing structure of claim 7, characterized in that:
the method comprises the following steps: step S00: performing primary excavation on a narrow foundation pit foundation in a construction site;
step S10: respectively erecting four supporting columns (1) at four corners in the ground of the narrow foundation pit;
step S20: a groove is formed by obliquely digging downwards along the diagonal direction, so that one end of the oblique strut (2) is positioned above the soil layer, and the other end of the oblique strut is obliquely laid down to abut against the bottom of the diagonal strut (1); meanwhile, the screw (4) is fixedly arranged on the abutting table (22);
step S30: installing a transverse strut (3), connecting two ends of the transverse strut (3) with the diagonal support columns (1) through screws respectively, and adjusting the installation position through waist-shaped holes arranged on an installation adjusting plate (11) and a connecting plate (21);
step S40: the other end of the screw rod (4) penetrates through the transverse strut (3) and is locked by mounting nuts on the upper side and the lower side;
step S50: two cross stabilizing columns (5) are installed along the horizontal direction, one ends of the cross stabilizing columns are respectively fixed on the other two supporting columns (1), and the other ends of the cross stabilizing columns are fixed on two sides of the transverse strut (3);
step S60: adjusting the positions of the two nuts to enable the screw rod (4) to be in a tensioned state; the abutting table (22) is in close contact with the supporting column (1), a downward acting force is applied to one end of the transverse strut (3), and a bolt fixed at the end of the transverse strut (3) is adjusted, so that the end is slightly moved downwards, and the transverse strut (3) applies a downward acting force to the transverse stabilizing column (5);
step S70: backfilling the groove provided with the oblique strut (2); and filling the remaining soil in the narrow foundation pit to bury the transverse strut (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210405598.7A CN114687358B (en) | 2022-04-18 | 2022-04-18 | Narrow foundation pit foundation reinforcement structure and reinforcement method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210405598.7A CN114687358B (en) | 2022-04-18 | 2022-04-18 | Narrow foundation pit foundation reinforcement structure and reinforcement method thereof |
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| Publication Number | Publication Date |
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| CN114687358A true CN114687358A (en) | 2022-07-01 |
| CN114687358B CN114687358B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210405598.7A Active CN114687358B (en) | 2022-04-18 | 2022-04-18 | Narrow foundation pit foundation reinforcement structure and reinforcement method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450911A1 (en) * | 1979-03-07 | 1980-10-03 | Sade Travaux Hydraulique | Construction technique for reinforcing narrow excavations - uses side grout type material instead of trench timbers |
| CN113356224A (en) * | 2021-05-24 | 2021-09-07 | 广东省交通规划设计研究院集团股份有限公司 | Reinforcing method for narrow foundation pit foundation and foundation pit structure |
| CN113863319A (en) * | 2021-10-20 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | Foundation pit passive area reinforcing method |
-
2022
- 2022-04-18 CN CN202210405598.7A patent/CN114687358B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450911A1 (en) * | 1979-03-07 | 1980-10-03 | Sade Travaux Hydraulique | Construction technique for reinforcing narrow excavations - uses side grout type material instead of trench timbers |
| CN113356224A (en) * | 2021-05-24 | 2021-09-07 | 广东省交通规划设计研究院集团股份有限公司 | Reinforcing method for narrow foundation pit foundation and foundation pit structure |
| CN113863319A (en) * | 2021-10-20 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | Foundation pit passive area reinforcing method |
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| Publication number | Publication date |
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| CN114687358B (en) | 2024-03-29 |
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Effective date of registration: 20220719 Address after: 365000 2F, No. 4-3 Baoshan Road, Junxi Town, Datian County, Sanming City, Fujian Province Applicant after: Haiyi Construction Engineering Group Co.,Ltd. Address before: 365000 2F, No. 4-3 Baoshan Road, Junxi Town, Datian County, Sanming City, Fujian Province Applicant before: Haiyi Construction Engineering Group Co.,Ltd. Applicant before: Fujian Jiangxia University |
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