CN210507489U - Circular cofferdam and island building platform support - Google Patents
Circular cofferdam and island building platform support Download PDFInfo
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- CN210507489U CN210507489U CN201920919202.4U CN201920919202U CN210507489U CN 210507489 U CN210507489 U CN 210507489U CN 201920919202 U CN201920919202 U CN 201920919202U CN 210507489 U CN210507489 U CN 210507489U
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- cofferdam
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 88
- 239000010959 steel Substances 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims description 38
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000010276 construction Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 3
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 15
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 15
- 238000009412 basement excavation Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of bridge construction cofferdam technique and specifically relates to a circular cofferdam and island platform support of building is related to. The circular cofferdam includes: a plurality of steel sheet piles; one end of each steel sheet pile is arranged at the bottom of the foundation pit, the other end of each steel sheet pile extends towards the opening end of the foundation pit, the steel sheet piles are sequentially connected, and the steel sheet pile at the head end is connected with the steel sheet pile at the tail end, so that the steel sheet piles sequentially connected form a cylinder shape. The technical problems that horizontal supports can be added in foundation pits to cause cofferdam cost increase and construction period is long in the prior art are solved.
Description
Technical Field
The utility model belongs to the technical field of bridge construction cofferdam technique and specifically relates to a circular cofferdam and island platform support of building is related to.
Background
When the structure is located in a river channel for construction, a construction method of constructing an island and a steel sheet pile cofferdam is often adopted, the cofferdam is square, and horizontal supports are gradually installed along with the increase of the excavation depth of a foundation pit, so that the steel sheet pile is stressed integrally, and the aim of stabilizing the cofferdam and supporting the foundation pit is fulfilled.
However, in the conventional cofferdam support of the square steel sheet pile, when the depth of the foundation pit is too large, due to the fact that the cantilever of the exposed part of the steel sheet pile is too long, the foundation pit collapses under the action of outside soil pressure, water pressure and dynamic load. In order to increase the external force resistance of the cofferdam, a horizontal support needs to be installed; after the horizontal support is installed, the construction height is limited, the speed of foundation pit excavation (adopting excavator excavation) and earthwork loading and unloading is seriously influenced, and the hoisting work of bearing platform reinforcing steel bars, templates and steel tower anchoring frames is seriously influenced; because a certain number of horizontal supports are added in the foundation pit, the manufacturing cost of the cofferdam is correspondingly increased, and the construction period is correspondingly prolonged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circular cofferdam to it can increase horizontal brace in the foundation ditch to exist among the alleviating prior art, leads to cofferdam cost-push, the technical problem of construction cycle length.
The utility model provides a pair of circular cofferdam, include: a plurality of steel sheet piles; one end of each steel sheet pile is arranged at the bottom of the foundation pit, the other end of each steel sheet pile extends towards the opening end of the foundation pit, the steel sheet piles are sequentially connected, and the steel sheet pile at the head end is connected with the steel sheet pile at the tail end, so that the steel sheet piles sequentially connected form a cylinder shape.
Further, the slotting directions of two adjacent steel sheet piles are opposite.
Further, the circular cofferdam also comprises a plurality of reinforcing mechanisms;
one end, facing the side wall of the foundation pit, of each groove, far away from the foundation pit, of each steel sheet pile is provided with one reinforcing mechanism, and the two adjacent reinforcing mechanisms are fixedly connected.
Further, the circular cofferdam also comprises a bearing mechanism;
the bearing mechanism is fixedly arranged below the reinforcing mechanism and is fixedly connected with one end, far away from the foundation pit, of the steel sheet pile, of the groove facing the side wall of the foundation pit.
Further, the bearing mechanism comprises a bearing plate and a supporting rod;
one end of the bearing plate and one end of the supporting rod are connected to the steel sheet pile, one end of the supporting rod is located below one end of the bearing plate, and the other end of the supporting rod is connected to one end, far away from the steel sheet pile, of the bearing plate.
Furthermore, the circular cofferdam also comprises a drainage ditch;
the drainage ditch is arranged at one side, close to the steel sheet pile, of the bottom of the foundation pit.
Further, the drainage ditch comprises a ditch body and a plurality of water collecting wells;
the ditch body is the annular and establishes the bottom of foundation ditch, it is a plurality of the sump pit is followed the extending direction interval of ditch body sets up.
Further, the reinforcing mechanism comprises two oppositely arranged I-shaped steels which are fixedly connected.
Furthermore, a stair is arranged in the circular cofferdam.
Another object of the utility model is to provide a platform support builds island, including two circular cofferdams as above.
Further, the island building platform support further comprises a channel, and the channel connects the two circular cofferdams.
The utility model provides a pair of circular cofferdam includes: a plurality of steel sheet piles; one end of each steel sheet pile is arranged at the bottom of the foundation pit, the other end of each steel sheet pile extends towards the opening end of the foundation pit, the steel sheet piles are sequentially connected, and the steel sheet pile at the head end is connected with the steel sheet pile at the tail end, so that the steel sheet piles sequentially connected form a cylinder shape. A plurality of steel sheet piles are the cylinder setting, and the whole atress of cofferdam of cylinder can increase the atress performance of cofferdam, and then can cancel the horizontally support, and meanwhile, foundation ditch itself need not adjust to there can increase horizontal support in the foundation ditch in alleviating prior art, lead to cofferdam cost increase, the technical problem of construction cycle length.
The utility model provides a pair of island platform support builds, including two as above circular cofferdams. The beneficial effect that its produced is the same with the effect of circular cofferdam, no longer gives unnecessary details.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view of a circular cofferdam provided by an embodiment of the present invention;
fig. 2 is a partial enlarged view of a circular cofferdam provided by the embodiment of the present invention;
fig. 3 is a front view of the circular cofferdam provided by the embodiment of the present invention disposed in the foundation pit;
fig. 4 is a top view of the island platform support provided by the embodiment of the present invention.
Icon: 1-circular cofferdam; 2, foundation pit; 3-a channel; 100-steel sheet piles; 200-a strengthening mechanism; 300-a carrying mechanism; 400-drainage ditch; 500-stairs; 310-a carrier plate; 320-a support bar; 410-a gutter body; 420-water collecting well.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1-3, the utility model provides a circular cofferdam 1, include: a plurality of steel sheet piles 100; one end of the steel sheet pile 100 is arranged at the bottom of the foundation pit 2, the other end of the steel sheet pile 100 extends towards the opening end of the foundation pit 2, a plurality of steel sheet piles are sequentially connected, and the steel sheet pile 100 at the head end is connected with the steel sheet pile 100 at the tail end, so that the plurality of steel sheet piles 100 which are sequentially connected form a cylinder shape.
Wherein, the steel sheet pile 100 is a V-shaped Larsen steel sheet pile 100(400 multiplied by 155 multiplied by 15.5mm) with the length of 12 m.
In this embodiment, a plurality of steel sheet piles 100 enclose a cylindrical cofferdam, and the whole stress of the cylindrical cofferdam can increase the stress performance of the cofferdam, so that the horizontal support can be cancelled, and meanwhile, the foundation pit 2 itself does not need to be adjusted, so as to solve the technical problems that the horizontal support is increased in the foundation pit 2 in the prior art, the cofferdam cost is increased, and the construction period is long.
In the above embodiment, the two adjacent steel sheet piles 100 are slotted in opposite directions.
In this embodiment, two adjacent steel sheet piles 100 are provided with opposite grooving directions, when the cylindrical cofferdam 1 is stressed, a certain acting force can be offset between the two steel sheet piles 100 with opposite grooving directions, and the two adjacent steel sheet piles can be detachably connected through the structure of the steel sheet pile 100 per se by the arrangement of the two adjacent steel sheet piles 100, so that the construction speed can be increased.
Specifically, the circular cofferdam 1 further comprises a plurality of reinforcing mechanisms 200; one end, facing the side wall of the foundation pit 2, of each steel sheet pile 100, which is far away from the foundation pit 2, is provided with one reinforcing mechanism 200, and the two adjacent reinforcing mechanisms 200 are fixedly connected.
The reinforcing mechanism 200 includes two oppositely disposed i-beams, and the two i-beams are fixedly connected.
In this embodiment, the reinforcing mechanisms 200 are disposed on the steel sheet pile 100 with the slot facing away from the center, and a plurality of reinforcing mechanisms 200 may be fixedly connected by welding to form a circular steel purlin, so as to enhance the stress performance of the cylindrical cofferdam.
The prior art is strutted through conventional square steel sheet pile cofferdam, and when 2 degree of depth of foundation ditch is big, need install the installation level and support to improve the ability of the anti external force of cofferdam, and then lead to the cost increase of cofferdam, problem that the construction cycle is long. In the application, the steel sheet piles 100 are surrounded into a cylindrical shape, and the directions of the grooves of the two adjacent steel sheet piles 100 are different, so that the force is easily offset when the cofferdam is stressed, and the stress performance of the cofferdam can be increased by using the characteristic of the integral stress of the cylindrical shape, so that the problems are solved, the construction efficiency is improved, and the cost is reduced.
In the above embodiment, the circular cofferdam 1 further comprises a bearing mechanism 300; the bearing mechanism 300 is fixedly arranged below the reinforcing mechanism 200 and is fixedly connected with one end, away from the foundation pit 2, of the steel sheet pile 100, the opening of which faces the side wall of the foundation pit 2.
In this embodiment, a bearing mechanism 300 is fixed on each steel sheet pile 100 with the slot facing the side wall of the foundation pit 2, and in the construction process, the bearing mechanism 300 is welded on the steel sheet pile 100, and then the two ends of the reinforcing mechanism 200 are respectively placed on the two adjacent bearing mechanisms 300, so that the construction speed can be increased.
In the above embodiment, the carrying mechanism 300 includes a carrying plate 310 and a supporting rod 320; one end of the bearing plate 310 and one end of the supporting rod 320 are both connected to the steel sheet pile 100, one end of the supporting rod 320 is located below one end of the bearing plate 310, and the other end of the supporting rod 320 is connected to one end of the bearing plate 310, which is far away from the steel sheet pile 100.
In this embodiment, a triangle is formed between the supporting rod 320, the bearing plate 310 and the steel sheet pile 100, and the supporting rod 320, the bearing plate 310 and the steel sheet pile 100 are all welded, so that the reinforcing mechanism 200 is more stable when placed on the bearing plate 310, and the bearing plate 310 can be disposed at an included angle with the steel sheet pile 100, so that the end of the bearing plate 310, which is far away from the steel sheet pile 100, is located above the end of the bearing plate connected with the steel sheet pile 100, so as to place the reinforcing mechanism 200.
In the above embodiment, the circular cofferdam 1 further comprises a drainage ditch 400; the drainage ditch 400 is arranged at one side of the bottom of the foundation pit 2 close to the steel sheet pile 100.
Specifically, the drainage ditch 400 includes a ditch body 410 and a plurality of collector wells 420; the trench body 410 is annularly arranged at the bottom of the foundation pit 2, and the plurality of water collecting wells 420 are arranged at intervals along the extending direction of the trench body 410.
In this embodiment, a dewatering well is disposed at a position corresponding to the water collecting well 420 on the outer side of the foundation pit 2, the dewatering well is communicated with the water collecting well 420, and the depth of the dewatering well is greater than that of the foundation pit 2, so that water collected in the water collecting well 420 can enter the dewatering well, and water storage in the foundation pit 2 is avoided.
In the above embodiment, the circular cofferdam 1 is provided with stairs 500 therein.
In this embodiment, the stairs 500 are provided to facilitate the staff entering the circular cofferdam 1.
The specific construction method comprises the following steps:
1. inserting and striking a steel sheet pile 100 with the length of 12m by using a vibrating hammer, fully striking the steel sheet pile 100 into the ground, and closing the steel sheet pile 100 into a circle according to the coordinate position; and simultaneously, pumping a dewatering well outside the steel sheet pile 100 for dewatering, arranging a circle of well point dewatering well outside the cofferdam by 2.5m, wherein the diameter of a single dewatering well is 600mm, the well depth is 21m, the filter pipe length is 2m, and the inter-well distance is 6.5 m.
2. After the steel sheet pile 100 is closed, an excavator is used for downwards excavating for 1.5m, the bearing mechanism 300 is installed and welded with the steel sheet pile 100, the reinforcing mechanism 200 is installed after the bearing mechanism 300 is welded, the reinforcing mechanism 200 is arranged along the inner side of the circular steel sheet pile 100, the reinforcing mechanism 200 is welded end to end into a circle and is welded with the bearing mechanism 300 into a whole, and a closed circular stressed structure is formed.
3. Continuously excavating earthwork in the cofferdam by using an excavator, excavating to the bottom of the foundation pit 2, and pouring bottom sealing concrete; when the earthwork is excavated, the dewatering well needs to synchronously pump water, so that the groundwater is prevented from seeping back; and pumping water until the construction of the bearing platform is finished.
Example 2
As shown in fig. 4, another object of the present invention is to provide a support for island-building platform, which comprises two circular cofferdams 1.
Specifically, the island building platform support further comprises a channel 3, and the channel 3 connects the two circular cofferdams 1.
In the embodiment, the cofferdam is convenient for the construction of the bearing platform, and the construction space of the bearing platform is ensured.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A circular cofferdam, characterized in that it comprises: a plurality of steel sheet piles;
one end of each steel sheet pile is arranged at the bottom of the foundation pit, the other end of each steel sheet pile extends towards the opening end of the foundation pit, the steel sheet piles are sequentially connected, and the steel sheet pile at the head end is connected with the steel sheet pile at the tail end, so that the steel sheet piles sequentially connected form a cylinder shape.
2. The circular cofferdam of claim 1, wherein the directions of slotting of two adjacent steel sheet piles are opposite.
3. The circular cofferdam of claim 2, wherein said circular cofferdam further comprises a plurality of reinforcing mechanisms;
one end, facing the side wall of the foundation pit, of each groove, far away from the foundation pit, of each steel sheet pile is provided with one reinforcing mechanism, and the two adjacent reinforcing mechanisms are fixedly connected.
4. The circular cofferdam of claim 3, wherein said circular cofferdam further comprises a load bearing mechanism;
the bearing mechanism is fixedly arranged below the reinforcing mechanism and is fixedly connected with one end, far away from the foundation pit, of the steel sheet pile, of the groove facing the side wall of the foundation pit.
5. The circular cofferdam of claim 4, wherein said bearing means comprises a bearing plate and a support bar;
one end of the bearing plate and one end of the supporting rod are connected to the steel sheet pile, one end of the supporting rod is located below one end of the bearing plate, and the other end of the supporting rod is connected to one end, far away from the steel sheet pile, of the bearing plate.
6. The circular cofferdam of claim 1, wherein said circular cofferdam further comprises drainage ditches;
the drainage ditch is arranged at one side, close to the steel sheet pile, of the bottom of the foundation pit.
7. The circular cofferdam of claim 6, wherein said drainage ditch comprises a ditch body and a plurality of water collection wells;
the ditch body is the annular and establishes the bottom of foundation ditch, it is a plurality of the sump pit is followed the extending direction interval of ditch body sets up.
8. The circular cofferdam of claim 3, wherein said reinforcing means comprises two oppositely disposed i-beams, said two i-beams being fixedly connected.
9. Island-building platform support, characterized in that it comprises two circular cofferdams according to any of the claims from 1 to 8.
10. Island building platform support according to claim 9, characterized in that it further comprises a channel connecting the two circular cofferdams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920919202.4U CN210507489U (en) | 2019-06-18 | 2019-06-18 | Circular cofferdam and island building platform support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920919202.4U CN210507489U (en) | 2019-06-18 | 2019-06-18 | Circular cofferdam and island building platform support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210507489U true CN210507489U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920919202.4U Active CN210507489U (en) | 2019-06-18 | 2019-06-18 | Circular cofferdam and island building platform support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210507489U (en) |
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2019
- 2019-06-18 CN CN201920919202.4U patent/CN210507489U/en active Active
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