CN113605404A - Steel plate-H-shaped steel combined type foundation pit supporting structure and construction method thereof - Google Patents
Steel plate-H-shaped steel combined type foundation pit supporting structure and construction method thereof Download PDFInfo
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- CN113605404A CN113605404A CN202110879587.8A CN202110879587A CN113605404A CN 113605404 A CN113605404 A CN 113605404A CN 202110879587 A CN202110879587 A CN 202110879587A CN 113605404 A CN113605404 A CN 113605404A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 198
- 239000010959 steel Substances 0.000 title claims abstract description 198
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 239000002689 soil Substances 0.000 description 12
- 239000002023 wood Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a steel plate-H-shaped steel combined foundation pit supporting structure which comprises H-shaped steel arranged at intervals along the edge of a foundation pit and a supporting steel plate inserted between two adjacent H-shaped steel; the grooves of two adjacent H-shaped steels are arranged oppositely, the clamping pieces are fixedly arranged in the grooves of the H-shaped steels, a clamping groove is formed between each clamping piece and the flange of each H-shaped steel, and the two ends of the supporting steel plate in the horizontal direction are inserted into the clamping grooves respectively. The application also discloses a construction method of any one of the steel plate-H-shaped steel combined type foundation pit supporting structures. In this application, set up the card in the recess of H shaped steel and held the piece, utilize the card to hold the draw-in groove of a piece with the edge of a wing, restrict strutting the steel sheet, avoid strutting the steel sheet and break away from the draw-in groove, guaranteed the work progress in, strut the stability of steel sheet.
Description
Technical Field
The invention relates to a steel plate-H-shaped steel combined foundation pit supporting structure and a construction method thereof.
Background
The steel structure support wall is continuously popularized due to the advantages of convenience in construction, recoverability and the like, the plate-type support wall formed by the H-shaped steel and the support wood plate is applied to an area with a better soil structure, the support wood plate is inserted between two adjacent H-shaped steel serving as a support pile, the groove of the H-shaped steel is used as a clamping groove of the support wood plate, and the steel structure support wall has the advantages of quickness in construction and convenience in recovery.
However, the grooves of the H-shaped steel are generally ten times the thickness of the supporting boards, the supporting boards have a large moving space in the grooves, when the soil outside the foundation pit is pressed against the supporting boards all the time, the supporting boards can be kept stable, but in the construction of the foundation pit, the local collapse of the soil in a partial area always occurs, although the large problem cannot be caused to the whole foundation pit, the supporting boards in the corresponding area lose the compaction effect of the soil after the local collapse, because the width of the grooves of the H-shaped steel is large, the partial supporting boards incline and separate from the grooves of the H-shaped steel, the separated supporting boards need to be reinstalled, the reinstallation process usually lasts for a long time, the normal construction in the area is affected, and the overall construction progress of the foundation pit is also affected. Because the supporting wood boards are assembled step by step, the wood boards and the H-shaped steel are not effectively connected, and the mutual gap is large, the supporting structure can only retain soil and cannot stop water.
Disclosure of Invention
In order to solve the problems, the invention firstly provides a steel plate-H-shaped steel combined foundation pit supporting structure which comprises H-shaped steel arranged at intervals along the edge of a foundation pit and a supporting steel plate inserted between two adjacent H-shaped steel;
the grooves of two adjacent H-shaped steels are arranged oppositely, the clamping pieces are fixedly arranged in the grooves of the H-shaped steels, a clamping groove is formed between each clamping piece and the flange of each H-shaped steel, and the two ends of the supporting steel plate in the horizontal direction are inserted into the clamping grooves respectively. Preferably, the web of the H-shaped steel is perpendicular to the inner wall of the foundation pit where the H-shaped steel is located. The width of the clamping groove is 5-20mm larger than the thickness of the supporting steel plate. In this application, set up the card in the recess of H shaped steel and held the piece, utilize the card to hold the draw-in groove of a piece with the edge of a wing, restrict strutting the steel sheet, avoid strutting the steel sheet and break away from the draw-in groove, guaranteed the work progress in, strut the stability of steel sheet.
Furthermore, a limiting part is fixedly installed on the supporting steel plate, a limiting groove is formed between the limiting part and the supporting steel plate, and the flange of the H-shaped steel is inserted into the limiting groove. Preferably, the limiting piece is welded on the supporting steel plate, and the limiting piece is at least arranged in the range of 1-2m below the supporting steel plate. After the limiting part is arranged, the steel sheet pile sinking guide device can accurately guide the steel sheet pile sinking together with the clamping part.
Furthermore, in order to change different clamping parts conveniently, the distance between the clamping part and the flange is adjusted, supporting steel plates with different thicknesses are adopted, or H-shaped steel is convenient to recover and is used as other parts, and the clamping part is detachably arranged on a web plate of the H-shaped steel.
Further, in order to reduce the resistance when sinking, the bottom of the clamping piece is in a wedge shape with the small end protruding downwards.
Furthermore, in order to improve the construction efficiency and simultaneously facilitate the extraction and recovery of the supporting steel plates, only one supporting steel plate is inserted between two adjacent H-shaped steels and exceeds the set bottom surface of the foundation pit downwards. At present, a supporting plate between two adjacent H-shaped steels is generally formed by a plurality of boards, the boards are overlapped in the height direction, no connection exists between the boards, when construction is carried out, an outer wall of an underground structure is from bottom to top, the boards with corresponding heights are gradually removed along with gradual rising of the outer wall, when the construction method is adopted, due to extrusion of a soil body outside a foundation pit on the boards, one end of each board needs to be forcefully pushed to the outside of the foundation pit, then the boards are shaken left and right, and the boards are taken out. Or the wood board is rotated along the vertical direction, and the wood board can be taken out after being rotated for a certain angle because the height of the wood board is smaller than the width between two adjacent H-shaped steels, so that the recovery methods of the two wood boards are low in efficiency, and part of the wood board can be damaged sometimes and cannot be reused.
In this application, adopt the steel sheet as the strake board, though earlier cost-push is improved, owing to can retrieve completely, reuse can improve the efficiency of construction moreover, will adopt the plank to have higher comprehensive cost advantage as the strake board.
Secondly, in order to smoothly implement the steel plate-H-shaped steel combined foundation pit supporting structure, the application also discloses a construction method of any one of the steel plate-H-shaped steel combined foundation pit supporting structures, and the construction method comprises the following steps:
(1) sinking the H-shaped steel carrying the clamping piece into the ground along a set position; then inserting a supporting steel plate between two adjacent H-shaped steels, and inserting the supporting steel plate into a clamping groove between a clamping piece and the flange of the H-shaped steel;
(2) excavating a foundation pit, and constructing an underground structure;
(3) and after the underground structure is finished, pulling out the supporting steel plate and the H-shaped steel, and recovering.
By utilizing the construction method, the construction of the supporting structure can be smoothly completed, and the construction cost can be effectively reduced because the supporting steel plate and the H-shaped steel are recovered.
Further, in the step (1), a mud distribution plate is detachably mounted on the H-shaped steel, the mud distribution plate is inserted into the clamping groove and sinks into the ground along with the H-shaped steel, then the mud distribution plate is pulled out to form a mud distribution hole, then the supporting steel plate is inserted between two adjacent H-shaped steels, and at least part of two ends of the supporting steel plate is located in the mud distribution hole.
Sinking the in-process at H shaped steel, earth can form an earth strip in the draw-in groove between H shaped steel and the card holder, moreover because the draw-in groove is narrower, under the effect of frictional force, the hardness of earth strip can be great, consequently when sinking and strut the steel sheet, need adopt great pressure just can accomplish, not only make the power consumption increase when sinking and strut the steel sheet, but also reduced the speed of sinking, be unfavorable for the promotion of efficiency of construction. In addition, solid particles such as underground small stones can be plugged into the clamping groove, blocking effect on the clamping groove can be increased, the supporting steel plate can sink in an unfinished mode sometimes, and the clamping groove needs to be dredged by professional equipment.
After the mud distributing plate is arranged, the flange of the H-shaped steel and a clamping groove between clamping pieces are blocked in advance by the mud distributing plate, the mud is prevented from entering the clamping groove, the H-shaped steel sinks, the mud distributing plate is extracted, a mud distributing hole is formed, the resistance of a supporting steel plate when the supporting steel plate sinks can be reduced, in the field construction process, the mud distributing plate is arranged, the sinking resistance can be reduced by 10-40% when the supporting steel plate sinks, the sinking resistance can be reduced according to the difference of soil quality, and the condition that the supporting steel plate cannot sink due to the fact that solid particles are clamped in the clamping groove can not occur.
Specifically, this divide mud board includes that the portion of lifting by crane together and connect two branch mud legs in this portion of lifting by crane, and these two branch mud legs extend in parallel, are provided with one between two branch mud legs and ride the wall seam, ride the wall seam card and hold on the web of H shaped steel, make two branch mud legs insert respectively in the draw-in groove of H shaped steel both sides. This design can comparatively conveniently utilize a branch mud board to carry out the shutoff to the draw-in groove of same H shaped steel both sides, can once only form two branch mud holes, improves work efficiency.
Furthermore, in order to facilitate installation and smooth pulling out of the mud separating plate, the width of the riding wall gap is 1-2mm larger than the thickness of the web plate of the H-shaped steel, and in the horizontal direction, the mud separating legs at least exceed one side of the clamping piece departing from the web plate outwards.
Furthermore, in order to reduce the amount of soil entering the mud distributing holes when the supporting steel plate sinks, two sides of the lower end of the supporting steel plate are respectively provided with a guide plate, when the supporting steel plate is inserted downwards, each guide plate is inserted into one mud distributing hole, and the guide plates are completely covered by the mud distributing holes when the supporting steel plate is observed along the vertical direction. In the process of sinking and supporting the steel plate, under the promotion of supporting the steel plate, the earthwork of supporting the steel plate below can flow all around, makes partial earth enter into branch mud downthehole, causes the jam in branch mud hole, sets up the deflector after, the deflector can at first enter into branch mud downthehole, because the hindrance of deflector, can reduce effectively because the extrusion of supporting the steel plate and enter into the soil volume in branch mud hole.
H shaped steel, supporting steel plate and card are held the piece and are formed shaped steel sheet pile supporting construction, and this supporting construction wholeness is good, and rigidity is big, not only can keep off the soil, can regard as the stagnant water curtain simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a steel plate-H-shaped steel combined type foundation pit supporting structure
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic structural view of the mud separating plate.
Fig. 4 is a schematic view in the direction of a-a in fig. 3.
Fig. 5 is a schematic structural view of the supporting steel plate.
FIG. 6 is a construction flow chart of the steel plate-H-shaped steel combined type foundation pit supporting structure.
Fig. 7 is a perspective view of the H-section steel with the mud separating plate inserted.
Fig. 8 is a perspective view of the H-section steel with the supporting steel plate inserted.
Detailed Description
Referring to fig. 1 and 2, a steel plate-H-section combined type foundation pit supporting structure includes H-sections 10 arranged at intervals along the edge of a foundation pit 100, and a supporting steel plate 31 interposed between two adjacent H-sections 10. In this embodiment, only one supporting steel plate is inserted between two adjacent H-shaped steels, and the supporting steel plate extends downward beyond the set bottom surface 101 of the foundation pit 100.
The web 11 of H shaped steel 10 is perpendicular to the inner wall of the foundation ditch of place department, makes the recess 23 of two adjacent H shaped steel 10 set up relatively, and fixed mounting has the card to hold piece 21 in the recess 23 of H shaped steel, is called first flange 12 and second flange 13 respectively with two flanges of H shaped steel 10, and wherein first flange 12 is towards the inside of foundation ditch, and second flange 13 is towards the outside of foundation ditch.
In this embodiment, the retaining member 21 is made of an angle steel, one side wall of the angle steel abuts against the web 11, the first bolt 22 fastens the one side wall of the angle steel to the web 11, a clamping groove 24 is formed between the other side wall of the angle steel and the first flange 12, and two ends of the supporting steel plate 31 in the horizontal direction are respectively inserted into the clamping groove 24.
In this embodiment, the thickness S of the supporting steel plate is 12mm, and the width W of the slot 24 is 22 mm.
An L-shaped limiting member 32 is welded to the inner surface of the supporting steel plate 31, a limiting groove 321 is formed between the limiting member 32 and the supporting steel plate, and the first flange 12 of the H-shaped steel 10 is inserted into the limiting groove 321. The inner surface of the supporting steel plate 31 is a surface facing only the inside of the foundation pit, and in fig. 1, the supporting steel plate 31 is a surface facing upward. In this embodiment, the stopper 32 and the supporting steel plate 31 have the same height, and are welded together. Because the supporting steel plate has higher strength and also has the function of guiding, it can be understood that, in another embodiment, the limiting piece can also be arranged only at the lower part of the supporting steel plate, and the height is 1-2 meters.
In order to reduce the resistance of the soil body, the bottom end 211 of the retaining member 21 is in the shape of a wedge with a small end protruding downward, specifically, in this embodiment, the lower end surface 212 of the angle steel is an inclined surface, and the included angle α between the lower end surface 212 and the horizontal plane is 60 °.
The construction method of the steel plate-H-shaped steel combined foundation pit supporting structure in the embodiment is described below with reference to fig. 6, and the construction method specifically includes the following steps:
(1) referring to step (a) of fig. 6, the H-section steel 10 carrying the retainer 21 is sunk into the ground along a set position.
The mud separating plate 50 is detachably mounted on the H-shaped steel 10, please refer to fig. 3, 4 and 7, the mud separating plate 50 comprises a lifting part 51 and two mud separating legs 52 connected to the lifting part 51, the two mud separating legs 52 extend in parallel, a wall riding seam 53 is arranged between the two mud separating legs, one end of the wall riding seam 53, which is far away from the lifting part 51, is open, and the wall riding seam 53 is clamped on the web plate 11 of the H-shaped steel 10, so that the two mud separating legs are respectively inserted into the clamping grooves 24 on two sides of the H-shaped steel. The width of the riding seam is 15mm, and in the horizontal direction, the mud distributing leg 52 extends outwards beyond the side of the holding piece 21, which faces away from the web plate 11. In this embodiment, the thickness of the flange of the H-section steel 10 is 13 mm.
The lifting part 51 is provided with a lifting hole 54, the two mud distributing legs 52 are provided with positioning holes 55, the second bolt 15 fixes the mud distributing legs on the first flange 12 and the clamping member 21 through the positioning holes 55, and when the H-shaped steel 10 is completely sunk, the positioning holes are positioned above the ground so as to be convenient for pulling out the pins when the mud distributing plate is lifted subsequently.
Referring to step (b) of fig. 6, when the H-section steel 10 is sunk, the mud separating plate is simultaneously sunk into the ground, then the second bolt is removed, and the mud separating plate is pulled out by the lifting hole 54 to form a mud separating hole 59.
Referring to step (c) of fig. 6 and also referring to fig. 8, the supporting steel plate is inserted between two adjacent H-shaped steels, and the supporting steel plate is inserted into the clamping groove between the clamping member and the flange of the H-shaped steel, and two ends of the supporting steel plate are at least partially located in the mud distributing holes 59.
(2) Referring to step (d) of fig. 6, the excavation of the foundation pit 100 is performed, and the process is completed.
Referring to step (e) of fig. 6, the underground structure 80 is constructed in the foundation pit 100.
(3) Referring to step (f) of fig. 6, after the underground structure is completed, the supporting steel plate 31 and the H-section steel 10 are pulled out, recovered, and the generated gap is grouted and backfilled.
In the present embodiment, referring to fig. 5, in order to reduce the earth from entering the mud separating holes 59 when the supporting steel plate 31 sinks, two guide plates 312 are respectively disposed on two sides of the lower end of the supporting steel plate 31. Along the width direction of the supporting steel plate, the bottom surface 314 of the guide plate 312 inclines downwards from inside to outside, and the included angle beta between the bottom surface 314 of the guide plate 312 and the horizontal plane is 50 degrees.
When the support steel plate is inserted downwards, each guide plate is inserted into a mud separating hole, and the mud separating holes completely cover the guide plates when the guide plates are observed along the vertical direction.
In this embodiment, the width of the supporting steel plate is 1.1 m, the soil is specifically plastic powdery clay, the steel plate is sunk by using the static pile driver, and the sinking pressure is 50 tons through detection, compared with a case that the mud separating plate is not arranged, when the supporting steel plate is sunk at the same sinking speed, the sinking pressure is 68 tons, and the sinking pressure can be reduced by 36%.
Claims (10)
1. A steel plate-H-shaped steel combined foundation pit supporting structure is characterized by comprising H-shaped steel arranged at intervals along the edge of a foundation pit and a supporting steel plate inserted between two adjacent H-shaped steel;
the grooves of two adjacent H-shaped steels are arranged oppositely, the clamping pieces are fixedly arranged in the grooves of the H-shaped steels, a clamping groove is formed between each clamping piece and the flange of each H-shaped steel, and the two ends of the supporting steel plate in the horizontal direction are inserted into the clamping grooves respectively.
2. The steel plate-H section combined type foundation pit supporting structure of claim 1, wherein a stopper is fixedly installed on the supporting steel plate, a stopper groove is formed between the stopper and the supporting steel plate, and a flange of the H section is inserted into the stopper groove.
3. The steel plate-H section combined type foundation pit supporting structure of claim 1,
the clamping piece is detachably arranged on a web plate of the H-shaped steel.
4. The steel plate-H section combined type foundation pit supporting structure of claim 1,
the bottom end of the clamping piece is in a wedge shape with the small end protruding downwards.
5. The steel plate-H section combined type foundation pit supporting structure of claim 1,
only one supporting steel plate is inserted between two adjacent H-shaped steels and exceeds the set bottom surface of the foundation pit downwards.
6. The construction method of the steel plate-H section combined type foundation pit supporting structure of any one of claims 1 to 5, comprising the steps of:
(1) sinking the H-shaped steel carrying the clamping piece into the ground along a set position; then inserting a supporting steel plate between two adjacent H-shaped steels, and inserting the supporting steel plate into a clamping groove between a clamping piece and the flange of the H-shaped steel;
(2) excavating a foundation pit, and constructing an underground structure;
(3) and after the underground structure is finished, pulling out the supporting steel plate and the H-shaped steel, and recovering.
7. The construction method according to claim 6,
in the step (1), the mud distributing plate is detachably mounted on the H-shaped steel, the mud distributing plate is inserted into the clamping groove and sinks underground along with the H-shaped steel synchronously, then the mud distributing plate is pulled out to form a mud distributing hole, then the supporting steel plate is inserted between two adjacent H-shaped steels, and at least part of two ends of the supporting steel plate is located in the mud distributing hole.
8. The construction method according to claim 7,
this divide mud board includes that the portion of lifting by crane together and connect two branch mud legs in this portion of lifting by crane, and these two branch mud legs extend in parallel, are provided with one between two branch mud legs and ride the wall seam, ride the wall seam card and hold on the web of H shaped steel, make two branch mud legs insert respectively in the draw-in groove of H shaped steel both sides.
9. The construction method according to claim 7,
the width of the wall riding gap is 1-2mm larger than the thickness of a web plate of the H-shaped steel, and in the horizontal direction, the mud distributing legs at least exceed one side of the clamping piece departing from the web plate outwards.
10. The construction method according to claim 7,
the two sides of the lower end of the supporting steel plate are respectively provided with a guide plate, when the supporting steel plate is inserted downwards, each guide plate is inserted into a mud distributing hole, and the mud distributing holes completely cover the guide plates when the supporting steel plate is observed along the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879587.8A CN113605404A (en) | 2021-08-02 | 2021-08-02 | Steel plate-H-shaped steel combined type foundation pit supporting structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879587.8A CN113605404A (en) | 2021-08-02 | 2021-08-02 | Steel plate-H-shaped steel combined type foundation pit supporting structure and construction method thereof |
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| CN113605404A true CN113605404A (en) | 2021-11-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000017655A (en) * | 1998-06-30 | 2000-01-18 | Toshihiko Fujii | Soldier piles and lagging method and groove forming member to be used therefor |
| JP3681746B1 (en) * | 2005-03-23 | 2005-08-10 | 丸紅建材リース株式会社 | Iron sheet pile and its insertion method |
| CN105696601A (en) * | 2016-02-27 | 2016-06-22 | 武汉市创先专利技术服务有限公司 | Reusable foundation pit supporting device with water stopping function and construction method |
| CN206784395U (en) * | 2017-04-25 | 2017-12-22 | 江苏长江机械化基础工程公司 | A kind of pattern foundation pit supporting structure longitudinal rigidity enhancing structure |
| KR101872996B1 (en) * | 2017-11-02 | 2018-07-02 | 김종운 | soil retaining structure |
-
2021
- 2021-08-02 CN CN202110879587.8A patent/CN113605404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000017655A (en) * | 1998-06-30 | 2000-01-18 | Toshihiko Fujii | Soldier piles and lagging method and groove forming member to be used therefor |
| JP3681746B1 (en) * | 2005-03-23 | 2005-08-10 | 丸紅建材リース株式会社 | Iron sheet pile and its insertion method |
| CN105696601A (en) * | 2016-02-27 | 2016-06-22 | 武汉市创先专利技术服务有限公司 | Reusable foundation pit supporting device with water stopping function and construction method |
| CN206784395U (en) * | 2017-04-25 | 2017-12-22 | 江苏长江机械化基础工程公司 | A kind of pattern foundation pit supporting structure longitudinal rigidity enhancing structure |
| KR101872996B1 (en) * | 2017-11-02 | 2018-07-02 | 김종운 | soil retaining structure |
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Application publication date: 20211105 |
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