CN221276615U - External-pulling double-row steel sheet pile foundation pit supporting structure - Google Patents
External-pulling double-row steel sheet pile foundation pit supporting structure Download PDFInfo
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- CN221276615U CN221276615U CN202322501748.7U CN202322501748U CN221276615U CN 221276615 U CN221276615 U CN 221276615U CN 202322501748 U CN202322501748 U CN 202322501748U CN 221276615 U CN221276615 U CN 221276615U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 200
- 239000010959 steel Substances 0.000 title claims abstract description 200
- 238000010276 construction Methods 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model relates to the technical field of foundation pit support, and provides a foundation pit support structure with externally-pulled double-row steel sheet piles, which comprises the following components: the front Larson steel sheet piles are arranged around the foundation pit and are connected with a double-spliced steel enclosing purlin; the rear Larson steel sheet piles are arranged around the foundation pit and are positioned at the outer sides of the front Larson steel sheet piles; and the opposite-pull steel bar pull rod is arranged between the front-row Larson steel sheet pile and the rear-row Larson steel sheet pile, and two ends of the opposite-pull steel bar pull rod are respectively tied with the front-row Larson steel sheet pile and the rear-row Larson steel sheet pile. The beneficial effects of the utility model are as follows: the front-row Larson steel sheet piles and the rear-row Larson steel sheet piles are connected through the opposite-pull steel bar pull rods, the front-row Larson steel sheet piles are used as supporting steel plates, the rear-row Larson steel sheet piles are used as pile anchors, a portal cantilever form is formed for retaining soil of the foundation pit, the whole stability performance is good, the method is suitable for construction of all secondary foundation pits, and is particularly suitable for construction of deep and ultra-deep thick silt geological foundation pits, and soil deformation is coordinated and stable.
Description
Technical Field
The utility model belongs to the technical field of foundation pit support, and particularly relates to an externally-pulled double-row steel sheet pile foundation pit support structure.
Background
At present, for a secondary foundation pit under the geological condition of ultra-deep silt, the composite soil nailing wall has the problems that the slope laying proportion is large, a large slope laying space is required, the slope is difficult to form, the stability is poorer than that of a row pile support and the like; the stability of the pile row support is higher than that of the composite soil nailing wall, but for a foundation pit with deep silt geology, the pile row support only by the cantilever often cannot meet the requirements, and if the cantilever pile with higher rigidity and the anchor cable support or the inner support are used, the problems of poor economy and long construction period exist; meanwhile, the supporting mode is one-time input, and circulation and recycling cannot be realized. Therefore, in order to meet the safety, economical efficiency and high efficiency of the construction of the secondary foundation pit under the geological condition of deep or ultra-deep thick sludge, a novel supporting mode and a construction method are needed to meet the requirements of site construction.
Disclosure of utility model
Aiming at the problems in the prior art, the application provides an externally-pulled double-row steel sheet pile foundation pit supporting structure, which aims to solve the problems of poor stability, poor economy, long construction period, incapability of turnover use and the like of a conventional secondary foundation pit supporting under the geological condition of deep or ultra-deep thick sludge.
The utility model provides a foundation pit supporting structure of an externally-pulled double-row steel sheet pile, which comprises the following components: the front-row Larson steel sheet piles are arranged around the foundation pit, the lower ends of the front-row Larson steel sheet piles are inserted into the soil body of the foundation pit, and the upper ends of the front-row Larson steel sheet piles are higher than the top of the foundation pit and are connected with double-spliced steel enclosing purlins; the rear-row Larson steel sheet piles are arranged around the foundation pit and are positioned on the outer sides of the front-row Larson steel sheet piles, the lower ends of the rear-row Larson steel sheet piles are inserted into soil outside the foundation pit, and the upper ends of the rear-row Larson steel sheet piles are higher than the top of the foundation pit; and the opposite-pulling steel bar pull rod is arranged between the front-row Larson steel sheet pile and the rear-row Larson steel sheet pile, and two ends of the opposite-pulling steel bar pull rod are respectively tied with the front-row Larson steel sheet pile and the rear-row Larson steel sheet pile.
Further, two ends of the opposite-pulling steel bar pull rod extend to opposite ends of the front-row Larson steel sheet piles and the rear-row Larson steel sheet respectively, and anchor heads are arranged at two ends of the opposite-pulling steel bar pull rod respectively.
Further, the anchor head comprises binding strips, a lining plate and anchor rod reinforcing steel bars; the anchor bar steel bar is connected with the opposite-pull steel bar pull rod through the binding strip, and the lining plate is also connected with the anchor bar steel bar.
Further, a double-spliced groove steel waist beam is connected to one side of the rear-row Larson steel sheet pile, which is opposite to the front-row Larson steel sheet pile; the opposite-pulling steel bar pull rod passes through the double-spliced groove steel waist beam.
Further, the lower end of the rear Larson steel sheet pile, which is positioned at the double-spliced groove steel waist beam, is also provided with a bracket.
Further, the double-spliced steel purlin is arranged on the inner side of the front-row Larson steel sheet pile along the edge of the foundation pit, a corner of the foundation pit is provided with a gusset, and the gusset is connected with the double-spliced steel purlin.
Further, the double-spliced steel purlin is multiple, and the multiple double-spliced steel purlins are spliced along the length direction of the double-spliced steel purlins.
Further, guide rail frames are respectively arranged on the inner side and the outer side of the front-row Larson steel sheet piles, and guide grooves are formed in the guide rail frames and are formed in the circumferential direction of the foundation pit; the lower ends of the front-row Larson steel sheet piles penetrate through the guide grooves and are inserted into the foundation pit soil body.
Further, the guide rail frame comprises at least two rows of guide beams, the two rows of guide beams are respectively arranged on the inner side and the outer side of the front-row Larson steel sheet piles, and the guide grooves are formed between the two rows of guide beams.
Further, the guide rail frame further comprises purlin surrounding piles which are arranged on one sides of the two rows of guide beams, which are opposite to the guide grooves, and the purlin surrounding piles are connected with the guide beams.
The beneficial effects of the utility model are as follows: the front-row Larson steel sheet piles and the rear-row Larson steel sheet piles are connected through the opposite-pull steel bar pull rods, the front-row Larson steel sheet piles are used as supporting steel plates, the rear-row Larson steel sheet piles are used as pile anchors, a portal cantilever form is formed for retaining soil of the foundation pit, the whole stability performance is good, the method is suitable for construction of all secondary foundation pits, and is particularly suitable for construction of deep and ultra-deep thick silt geological foundation pits, and soil deformation is coordinated and stable. The construction efficiency of the front-row Larson steel sheet piles, the rear-row Larson steel sheet piles, the opposite-pull steel bar pull rods and other components is high, the construction period is short, the cost is low, the requirements on construction sites are low, the construction requirements of the secondary foundation pit support of all the basic projects can be met, and the popularization and application are wide. And each component part of the supporting structure can be recycled.
Drawings
Fig. 1 is a schematic top view of a foundation pit supporting structure of an external-pull double-row steel sheet pile.
Fig. 2 is a partial top view schematic illustration of the connection of the front and rear rows of lassen steel sheet piles of fig. 1 by tie bars.
Fig. 3 is an enlarged schematic view of the connection of the rear-row lassen steel sheet piles with the double-spliced-groove steel wale of fig. 2.
Fig. 4 is a left side schematic view of fig. 3.
Fig. 5 is a schematic diagram of the front view structure of fig. 3.
Fig. 6 is an enlarged schematic view of the anchor head of fig. 5.
Fig. 7 is a schematic diagram of the splicing of two adjacent double-spliced steel purlins of the foundation pit supporting structure of the external-pull double-row steel sheet pile.
FIG. 8 is a partial schematic view of the gusset of FIG. 1 connected to a double-tailored steel purlin.
Fig. 9 is a schematic front view of the cooperation of the guide rail frame of the foundation pit supporting structure of the external-pull double-row steel sheet pile and the front-row Larson steel sheet pile.
Fig. 10 is a schematic top view of fig. 9.
In the figure: 1-front-row Larson steel sheet piles; 2-rear-row Larson steel sheet piles; 3-pulling a steel bar pull rod; 4-double-spliced steel purlin; 5-double-spliced groove steel waist beams; 6-anchor head; 61-binding; 62-anchor bar reinforcement; 63-lining board; 7-brackets; 8-a guide rail frame; 81-guide beams; 82-enclosing purlin piles; 9-gussets; 10-splice plate.
Detailed Description
The utility model is described in further detail below with reference to the drawings and specific examples.
The foundation pit supporting structure of the external-pulling double-row steel sheet pile shown in fig. 1-10 comprises: the steel plate pile comprises a front Larson steel plate pile 1, a rear Larson steel plate pile 2, a opposite-pulling steel bar pull rod 3 and a guide rail frame 8.
The front-row Larson steel sheet piles 1 are arranged around the foundation pit, the lower ends of the front-row Larson steel sheet piles 1 are inserted into the soil body of the foundation pit, the upper ends of the front-row Larson steel sheet piles 1 are higher than the top of the foundation pit, and the double-spliced steel enclosing purlin 4 is connected. The double-spliced steel enclosing purlin 4 is arranged on the inner side of the front-row Larson steel sheet pile 1 along the edge of the foundation pit, the inner side of the front-row Larson steel sheet pile 1 refers to one side of the front-row Larson steel sheet pile 1, which is close to the foundation pit, and on the contrary, the outer side of the front-row Larson steel sheet pile 1 refers to one side of the front-row Larson steel sheet pile, which is opposite to the foundation pit. As shown in fig. 1 and 8, a corner of the foundation pit is provided with a gusset 9, and the gusset 9 is connected with the double-spliced steel purlin 4. As shown in fig. 7 and 8, a plurality of double-spliced steel purlins 4 are provided, and the plurality of double-spliced steel purlins 4 are spliced along the length direction thereof. Two adjacent double-spliced steel purlins 4 in the length direction are spliced through a splice plate 10. Splice plate 10 is welded or bolted to double-spliced steel purlin 4.
The rear-row Larson steel sheet piles 2 are arranged around the foundation pit and are positioned on the outer sides of the front-row Larson steel sheet piles 1, the lower ends of the rear-row Larson steel sheet piles 2 are inserted into soil bodies outside the foundation pit, and the upper ends of the rear-row Larson steel sheet piles 2 are higher than the top of the foundation pit.
The side of the rear-row Larson steel sheet pile 2, which is opposite to the front-row Larson steel sheet pile 1, is connected with a double-spliced groove steel waist beam 5; the opposite-pulling steel bar pull rod 3 passes through the double-spliced groove steel waist beam 5. The rear-row Larson steel sheet pile 2 comprises a plurality of steel sheet piles, and the double-spliced groove steel waist beam 5 is connected with the plurality of steel sheet piles of the rear-row Larson steel sheet pile 2. The lower end of the rear Larson steel sheet pile 2, which is positioned at the double-spliced groove steel waist beam 5, is also provided with a bracket 7.
The opposite-pull steel bar pull rod 3 is arranged between the front-row Larson steel sheet pile 1 and the rear-row Larson steel sheet pile 2, and two ends of the opposite-pull steel bar pull rod are respectively in drawknot with the front-row Larson steel sheet pile 1 and the rear-row Larson steel sheet pile 2.
The two ends of the opposite-pulling steel bar pull rod 3 extend to opposite ends of the front-row Lasen steel sheet piles 1 and the rear-row Lasen steel sheet respectively, and anchor heads 6 are arranged at the two ends of the opposite-pulling steel bar pull rod 3 respectively.
As shown in fig. 3-5, the opposite-pulling steel bar pull rod 3 sequentially passes through the rear-row Larson steel sheet pile 2 and the double-spliced groove steel waist beam 5 and is connected with the anchor head 6. And the double-spliced groove steel waist beam 5 is positioned at the upper end of the bracket 7, and the bracket 7 adopts a reinforced tripod.
The anchor head 6 comprises binding strips 61, a lining plate 63 and anchor bar reinforcing steel bars 62; the anchor bar 62 is connected with the tie bar 3 through the tie bar 61, and the lining plate 63 is also connected with the anchor bar 62.
As shown in fig. 9-10, the inner side and the outer side of the front-row Larson steel sheet pile 1 are respectively provided with a guide rail frame 8, and the guide rail frames 8 are provided with guide grooves arranged along the circumference of the foundation pit; the lower end of the front-row Larson steel sheet pile 1 penetrates through the guide groove and is inserted into the foundation pit soil body. The guide rail frame 8 comprises at least two rows of guide beams 81, the two rows of guide beams 81 are respectively arranged on the inner side and the outer side of the front row of Larson steel sheet piles 1, and guide grooves are formed between the two rows of guide beams 81. The guide rail frame 8 further comprises purlin surrounding piles 82, wherein the purlin surrounding piles 82 are arranged on one side of the two rows of guide beams 81, which is opposite to the guide grooves, and are connected with the guide beams 81.
In this embodiment, the double-spliced steel purlin 4 is formed by splicing two steel sections along the width direction. The double-spliced steel waist beam 5 is formed by splicing two channel steels in the opposite directions of the notches. The splicing mode adopts welding.
The construction steps of the foundation pit supporting structure of the external-pulling double-row steel sheet pile in the embodiment are as follows:
Step one, construction preparation. Before construction, according to a site survey report, the model, the length, the specification and the like of the front-row Larson steel sheet pile 1, the rear-row Larson steel sheet pile 2, the double-spliced steel purlin 4, the double-spliced steel waist beam 5 and the angle brace 9 are confirmed, materials are checked and accepted before entering the field, and the quality and the specification of the materials are ensured to meet the requirement of construction.
And step two, installing a guide rail frame 8. In order to ensure that the axial position of the front-row Larson steel sheet pile 1 is correct and the pile is vertical, control pile driving precision, prevent buckling deformation of the front-row Larson steel sheet pile 1 and improve the penetrating capacity of the front-row Larson steel sheet pile 1, a guide rail frame 8 with certain rigidity is arranged, the guide rail frame 8 adopts a single-layer double-sided form and consists of an I-steel guide beam 81 and an enclosing purlin pile 82, and the enclosing purlin pile 82 is arranged along the length direction of the guide beam 81 at intervals of 4 m.
And thirdly, performing driving on the front-row Larson steel sheet piles 1 and the rear-row Larson steel sheet piles 2. The construction method of screen type driving is adopted, the screen type driving method is adopted, the crane is used for driving with a vibro hammer, sheet piles (namely front Larson steel sheet piles 1 and rear Larson steel sheet piles 2) are inserted into guide grooves of a guide rail frame 8 in a row, the screen type driving method is adopted after the sheet piles are in a screen wall shape, a group of sheet piles at two ends of the screen wall are driven to the design elevation, and after the front Larson steel sheet piles 1 are welded and fixed on a double-spliced steel enclosing purlin 4, the sheet piles are driven in the middle according to the sequence by 1/3 or 1/2. The inclination of the sheet pile is monitored at any time in the process of construction, and when the inclination is too large and cannot be adjusted by a drawing method, the sheet pile needs to be pulled up for construction.
The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the utility model without departing from the principles thereof are intended to be comprehended by those skilled in the art and are intended to be within the scope of the utility model.
Claims (10)
1. The utility model provides a double steel sheet pile foundation ditch supporting construction of external pulling type which characterized in that includes:
the front-row Larson steel sheet piles are arranged around the foundation pit, the lower ends of the front-row Larson steel sheet piles are inserted into the soil body of the foundation pit, and the upper ends of the front-row Larson steel sheet piles are higher than the top of the foundation pit and are connected with double-spliced steel enclosing purlins;
The rear-row Larson steel sheet piles are arranged around the foundation pit and are positioned on the outer sides of the front-row Larson steel sheet piles, the lower ends of the rear-row Larson steel sheet piles are inserted into soil outside the foundation pit, and the upper ends of the rear-row Larson steel sheet piles are higher than the top of the foundation pit; and
And the opposite-pull steel bar pull rod is arranged between the front-row Larson steel sheet pile and the rear-row Larson steel sheet pile, and two ends of the opposite-pull steel bar pull rod are respectively tied with the front-row Larson steel sheet pile and the rear-row Larson steel sheet pile.
2. The foundation pit supporting structure of the external-pulling double-row steel sheet pile according to claim 1, wherein two ends of the opposite-pulling steel bar pull rod extend to opposite ends of the front-row Larson steel sheet pile and the rear-row Larson steel sheet respectively, and anchor heads are arranged at two ends of the opposite-pulling steel bar pull rod respectively.
3. The foundation pit supporting structure of the external-pulling double-row steel sheet pile according to claim 2, wherein the anchor head comprises binding strips, lining plates and anchor rod reinforcing bars; the anchor bar steel bar is connected with the opposite-pull steel bar pull rod through the binding strip, and the lining plate is also connected with the anchor bar steel bar.
4. The foundation pit supporting structure of the externally pulled double-row steel sheet pile, which is characterized in that a side of the rear-row Larson steel sheet pile, which is opposite to the front-row Larson steel sheet pile, is connected with a double-spliced groove steel waist beam; the opposite-pulling steel bar pull rod passes through the double-spliced groove steel waist beam.
5. The foundation pit supporting structure of the externally pulled double-row steel sheet pile according to claim 4, wherein a bracket is further arranged at the lower end of the rear-row Larson steel sheet pile, which is positioned at the double-spliced groove steel waist beam.
6. The foundation pit supporting structure of the external pulling double-row steel sheet pile according to claim 1, wherein the double-spliced steel purlin is arranged on the inner side of the front row Lassen steel sheet pile along the edge of the foundation pit, a corner of the foundation pit is provided with a corner brace, and the corner brace is connected with the double-spliced steel purlin.
7. The foundation pit supporting structure of the external pulling double-row steel sheet pile according to claim 6, wherein a plurality of the double-spliced steel purlins are spliced along the length direction of the double-spliced steel purlins.
8. The foundation pit supporting structure of the external-pull double-row steel sheet piles, as set forth in claim 1, wherein guide rail frames are respectively arranged on the inner side and the outer side of the front-row Larson steel sheet piles, and guide grooves are formed in the guide rail frames and are arranged along the circumferential direction of the foundation pit; the lower ends of the front-row Larson steel sheet piles penetrate through the guide grooves and are inserted into the foundation pit soil body.
9. The foundation pit supporting structure of the pull-out double-row steel sheet pile according to claim 8, wherein the guide rail frame comprises at least two rows of guide beams, the two rows of guide beams are respectively arranged on the inner side and the outer side of the front-row Larson steel sheet pile, and the guide grooves are formed between the two rows of guide beams.
10. The foundation pit supporting structure of the externally pulled double-row steel sheet piles of claim 9, wherein the guide rail frame further comprises purlin surrounding piles which are arranged on one side of the two rows of guide beams, which is opposite to the guide grooves, and are connected with the guide beams.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221276615U true CN221276615U (en) | 2024-07-05 |
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