CN220521354U - Soft soil foundation pit supporting structure and lattice type steel pipe pile - Google Patents
Soft soil foundation pit supporting structure and lattice type steel pipe pile Download PDFInfo
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- CN220521354U CN220521354U CN202322051389.XU CN202322051389U CN220521354U CN 220521354 U CN220521354 U CN 220521354U CN 202322051389 U CN202322051389 U CN 202322051389U CN 220521354 U CN220521354 U CN 220521354U
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- steel pipe
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- type steel
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- pressing plate
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 99
- 239000010959 steel Substances 0.000 title claims abstract description 99
- 239000002689 soil Substances 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 claims abstract description 8
- 230000035515 penetration Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model belongs to the field of soft soil foundation pit support, and discloses a soft soil foundation pit support structure and lattice type steel pipe piles, wherein the soft soil foundation pit support structure is formed by arranging a plurality of lattice type steel pipe piles on a soil retaining side; the lattice type steel pipe pile consists of a three-limb lacing bar type pile body and a pressing plate welded at the top of the pile body, and a hole is formed in the middle of the pressing plate; the lattice type steel pipe piles are all arranged in the front or/and one front or one back alternately on the soil retaining side, and one row or a plurality of rows are arranged in the front or one back alternately; and a row of lattice type steel pipe piles positioned on the temporary side are connected together through a plurality of waist beams. The lattice type steel pipe piles are used as the support of the soft soil foundation pit, compared with the conventional rotary digging pore-forming pouring support piles, the construction period can be greatly shortened, and the construction cost is saved; compared with the steel sheet pile support, the side stiffness of the support structure can be improved, deformation is effectively restrained, and safety is improved.
Description
Technical Field
The utility model relates to the field of soft soil foundation pit support, in particular to a soft soil foundation pit support structure and lattice type steel pipe piles.
Background
In engineering construction, excavation of foundation pits on soft foundations deposited in Hunan or sea phases is often encountered. At this time, if the conventional rotary-digging hole-forming concrete bored concrete pile is adopted, the defects of difficult hole forming, poor concrete pouring quality (easy necking, mud clamping and the like), long construction period, high cost and the like exist, and if the conventional steel sheet pile is adopted, the problems of insufficient safety reserve, large foundation pit deformation and the like often occur due to the weak side rigidity of the steel sheet pile although the defects are avoided.
Therefore, it is necessary to design a pile foundation for soft soil foundation pit support to solve the above-mentioned problems.
Disclosure of Invention
The utility model aims to solve the technical problems existing in the prior art. Therefore, the utility model provides a soft soil foundation pit supporting structure, a supporting method thereof and lattice type steel pipe piles.
The technical scheme adopted for solving the technical problems is as follows:
providing a soft soil foundation pit supporting structure, wherein a plurality of lattice steel pipe piles are arranged on a soil retaining side; the lattice type steel pipe pile consists of a three-limb lacing bar type pile body and a pressing plate welded at the top of the pile body, and a hole is formed in the middle of the pressing plate; the lattice type steel pipe piles are all arranged in the front or/and one front or one back alternately on the soil retaining side, and one row or a plurality of rows are arranged in the front or one back alternately; and a row of lattice type steel pipe piles positioned on the temporary side are connected together through a plurality of waist beams.
The supporting method of the soft soil foundation pit supporting structure is also provided, and the supporting method is constructed according to the following method:
arranging a plurality of lattice steel pipe piles into one row or a plurality of rows at a set interval on the soil retaining side in a way of all positive arrangement or/and one positive-negative alternation;
connecting a row of lattice type steel pipe piles on the empty side together through a plurality of waist beams;
when the lattice type steel pipe piles are provided with a plurality of rows, adopting H-shaped steel to weld and connect the pressing plates of the plurality of rows of lattice type steel pipe piles into a whole;
and after the foundation pit is backfilled, pulling out the lattice type steel pipe piles, and recycling.
Preferably, the lattice type steel pipe pile is driven into soil body through static pressure or hammering, and a pile cap is arranged on a pile pressing plate during pile pressing.
Preferably, after the lattice type steel pipe pile is implanted into the soil body, fine stone concrete can be poured into the holes of the pressing top plate at the top of the steel pipe pile, so that the strength of the steel pipe type steel pipe pile is enhanced.
Still provide one kind weak soil foundation ditch supporting construction in lattice formula steel-pipe pile, the three limb batten strip pile body is by three column limbs that are equilateral triangle and the polylith batten strip of welding between two adjacent column limbs constitute, column limb and batten strip and roof board are full penetration welded joint.
Preferably, the column limb adopts a steel pipe, and a conical pile tip is welded at the bottom of the steel pipe.
Preferably, the steel pipe is made of Q235B or Q345B steel, the outer diameter of the steel pipe is 146 mm-245 mm, and the wall thickness of the steel pipe is 6 mm-16 mm.
Preferably, the conical pile tip is made of Q235B steel, the plate thickness is 6mm, and the cone angle is 40-60 degrees.
Preferably, the batten is made of Q235B steel, the plate thickness is 8-16 mm, and the distance between the topmost batten and the pressing plate is not more than 200mm.
Preferably, the height-width ratio of the batten strips is 1:2-1:2.5, and the distance between two adjacent batten strips is 1-2 times the height of the batten strips.
Preferably, the pressing plate is made of Q235B steel, the outer contour of the pressing plate is an equilateral triangle with angles removed, and the holes are profiling holes of the outer contour of the pressing plate.
Compared with the prior art, the utility model has the beneficial effects that:
the lattice type steel pipe piles are used as the support of the soft soil foundation pit, compared with the conventional rotary digging pore-forming pouring support piles, the construction period can be greatly shortened, and the construction cost is saved; compared with the steel sheet pile support, the side stiffness of the support structure can be improved, deformation is effectively restrained, and safety is improved.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a plan view of a first embodiment of a soft soil foundation pit supporting structure provided by the present utility model;
FIG. 2 is a plan view of a second embodiment of the soft soil foundation pit supporting structure provided by the present utility model;
FIG. 3 is a plan view of a third embodiment of a soft soil foundation pit supporting structure provided by the present utility model;
fig. 4 is a schematic structural view of a lattice type steel pipe pile according to the present utility model;
fig. 5 is a top perspective view of the lattice-type steel-pipe pile provided in fig. 4.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that all directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indication is correspondingly changed.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Example 1
The present embodiment provides a soft soil foundation pit supporting structure, as shown in fig. 1 to 3, which is formed by arranging a plurality of lattice type steel pipe piles 1 on a soil retaining side.
Preferably, as shown in fig. 4 and fig. 5, the lattice type steel pipe pile 1 is composed of a three-limb batten type pile body 1.1 and a pressing top plate 1.2 welded at the top of the pile body, the pressing top plate is arranged to enable the pile body to be uniformly stressed when being driven into soil, meanwhile, the connection strength of three column limbs of the pile body can be enhanced, a hole 1.2.0 is formed in the middle of the pressing top plate 1.2, concrete is conveniently poured into the pile body, and the strength of the pile body is enhanced.
In specific implementation, the supporting mode of the lattice type steel pipe pile is preferably as follows:
first embodiment: as shown in fig. 1, the lattice-type steel pipe piles 1 are all arranged in a row on the soil-retaining side.
Second embodiment: as shown in fig. 2, the lattice-type steel pipe piles 1 are alternately arranged in a row on the earth-retaining side.
Third embodiment: as shown in fig. 3, the lattice-type steel pipe piles 1 are alternately arranged in a plurality of rows, one on each side of the earth retaining wall, and two rows are provided in the illustrated embodiment, and more than two rows may be provided.
Preferably, a row of lattice type steel pipe piles 1 of the supporting structure positioned on the empty side are connected together through a plurality of waist beams 2.
The supporting method of the soft soil foundation pit supporting structure of the embodiment is as follows:
driving a plurality of lattice steel pipe piles into soil on the soil retaining side according to the actual situation and the preset interval by static pressure or hammering according to the implementation mode, and arranging pile caps on a pile pressing plate when pile pressing;
connecting a row of lattice type steel pipe piles on the empty side together through a plurality of waist beams;
when the lattice type steel pipe piles 1 are provided with a plurality of rows, the H-shaped steel 3 is adopted to weld and connect the pressing plates 1.2 of the plurality of rows of lattice type steel pipe piles 1 into a whole;
according to the design strength, fine stone concrete can be poured into holes of a pressing top plate at the top of the steel pipe pile when necessary, so that the strength of the steel pipe type steel pipe pile is enhanced;
and after the foundation pit is backfilled, pulling out the lattice type steel pipe piles, and recycling.
Example 2
The present embodiment provides a lattice steel pipe pile according to embodiment 1, as shown in fig. 4 and fig. 5, a pile body 1.1 of the steel pipe pile 1 is composed of three equilateral triangle-shaped column limbs 1.1.1 and a plurality of battens 1.1.2 welded between two adjacent column limbs 1.1.1, wherein the column limbs 1.1.1 are connected with the battens 1.1.2 and a roof pressing plate 1.2 by full penetration weld joints. According to the steel pipe pile, the column limbs are connected into a whole through the plurality of lacing bars, so that the lateral rigidity of the steel pipe pile is greatly improved.
Preferably, the column limb 1.1.1 is made of steel pipe, the steel pipe is made of Q235B or Q345B steel, the outer diameter of the steel pipe is 146 mm-245 mm, and the wall thickness of the steel pipe is 6 mm-16 mm; the bottom of the steel pipe is welded with a conical pile tip, the conical pile tip is made of Q235B steel, the thickness of the steel pipe is 6mm, the cone angle is 40-60 degrees, and the arrangement of the conical pile tip can enable the steel pipe pile to be driven into the soil body smoothly.
Preferably, the batten strip 1.1.2 is made of Q235B steel, the plate thickness is 8-16 mm, and the distance between the topmost batten strip 1.1.2 and the pressing plate 1.2 is not more than 200mm.
Preferably, the height-width ratio of the batten strips 1.1.2 is 1:2-1:2.5, and the distance between two adjacent batten strips is 1-2 times the height of the batten strips. The design meets the requirements of the steel pipe pile on lateral rigidity resistance and meets the requirements of the connection strength of the column limbs.
Preferably, the pressing plate 1.2 is made of Q235B steel, the outline of the pressing plate is an equilateral triangle with angles removed, and the hole 1.2.0 is a profiling hole of the outline of the pressing plate. The pressing plate adopts the shape of the chamfer reserved hole, so that the consumption of steel can be reduced, the cost is saved, a grasping space can be provided for the vibrating hammer, and the steel pipe pile can be conveniently driven and pulled.
Noteworthy are: the lattice type steel pipe pile provided by the utility model can be combined with other foundation pit supporting forms, such as lattice type steel pipe pile, upper slope or soil nailing wall, lattice type steel pipe pile, internal support or diagonal support, lattice type steel pipe pile, soil body reinforcement, lattice type steel pipe pile, anchor rod (anchor rope) and the like.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.
Claims (8)
1. The utility model provides a weak soil foundation ditch supporting construction which characterized in that: a plurality of lattice steel pipe piles are arranged on the soil retaining side;
the lattice type steel pipe pile consists of a three-limb lacing bar type pile body and a pressing plate welded at the top of the pile body, and a hole is formed in the middle of the pressing plate;
the lattice type steel pipe piles are all arranged in the front or/and one front or one back alternately on the soil retaining side, and one row or a plurality of rows are arranged in the front or one back alternately;
and a row of lattice type steel pipe piles positioned on the temporary side are connected together through a plurality of waist beams.
2. A lattice type steel pipe pile as defined in claim 1, wherein: the three-limb lacing bar type pile body consists of three equilateral triangle-shaped column limbs and a plurality of lacing bars welded between two adjacent column limbs, wherein the column limbs are connected with the lacing bars and the pressing plate through full penetration welding seams.
3. The lattice type steel pipe pile according to claim 2, wherein: the column limb adopts a steel pipe, and a conical pile tip is welded at the bottom of the steel pipe.
4. A lattice type steel pipe pile according to claim 3, wherein: the steel pipe is made of Q235B or Q345B steel, the outer diameter of the steel pipe is 146-245 mm, and the wall thickness of the steel pipe is 6-16 mm.
5. A lattice type steel pipe pile according to claim 3, wherein: the conical pile tip is made of Q235B steel, the plate thickness is 6mm, and the cone angle is 40-60 degrees.
6. The lattice type steel pipe pile according to claim 2, wherein: the lacing bars are made of Q235B steel, the plate thickness is 8-16 mm, and the distance between the topmost lacing bars and the pressing plate is not more than 200mm.
7. The lattice type steel pipe pile according to claim 6, wherein: the height-width ratio of the battens is 1:2-1:2.5, and the distance between two adjacent battens is 1-2 times the height of the battens.
8. The lattice type steel pipe pile according to claim 2, wherein: the pressing plate is made of Q235B steel, the outer contour of the pressing plate is an equilateral triangle with angles removed, and the holes are profiling holes of the outer contour of the pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322051389.XU CN220521354U (en) | 2023-08-01 | 2023-08-01 | Soft soil foundation pit supporting structure and lattice type steel pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322051389.XU CN220521354U (en) | 2023-08-01 | 2023-08-01 | Soft soil foundation pit supporting structure and lattice type steel pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220521354U true CN220521354U (en) | 2024-02-23 |
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ID=89931368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322051389.XU Active CN220521354U (en) | 2023-08-01 | 2023-08-01 | Soft soil foundation pit supporting structure and lattice type steel pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220521354U (en) |
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2023
- 2023-08-01 CN CN202322051389.XU patent/CN220521354U/en active Active
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