CN212506438U - Structure for reducing influence of foundation pit construction on adjacent pile foundation - Google Patents
Structure for reducing influence of foundation pit construction on adjacent pile foundation Download PDFInfo
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- CN212506438U CN212506438U CN202020662674.9U CN202020662674U CN212506438U CN 212506438 U CN212506438 U CN 212506438U CN 202020662674 U CN202020662674 U CN 202020662674U CN 212506438 U CN212506438 U CN 212506438U
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Abstract
The utility model relates to a foundation ditch construction technical field is a structure that reduces foundation ditch construction to closing on pile foundation influence particularly, is being equipped with the recess between the foundation ditch of treating the construction and closing on the pile foundation, is equipped with the pressure water pocket in the recess, and the pressure water pocket has three layer construction, from interior to exterior is inlayer, tensile middle level and elasticity skin in proper order, the inlayer make by the material that has gas tightness and water proofness. Compared with the prior art, the utility model, its advantage lies in: under intensive urban area carries out the foundation ditch construction condition, can effectively reduce the negative friction that produces in the foundation ditch precipitation leads to neighbouring pile foundation through the setting of recess and pressure water pocket, can effectively reduce the influence of the horizontal displacement of the soil body on every side that foundation ditch construction arouses simultaneously to neighbouring pile foundation, fill water through filling the pressure water pocket and exert pressure or reduce pressure, with the horizontal displacement of the soil body that produces in weakening the foundation ditch work progress, thereby can reduce the influence of foundation ditch excavation to peripheral building by a wide margin, construction cost is reduced, and construction efficiency is improved.
Description
Technical Field
The utility model relates to a foundation ditch construction technical field is a structure that reduces foundation ditch construction to closing on pile foundation influence particularly.
Background
The foundation pit precipitation and the displacement of the supporting structure in the foundation pit construction inevitably cause the soil body around the foundation pit to generate vertical settlement and horizontal displacement. The foundation pit precipitation can cause the reduction of underground water level around the adjacent soil-squeezing pile and the increase of effective stress in soil around the adjacent pile foundation, so that negative frictional resistance is generated on the pile foundation, and the existence of the negative frictional resistance can cause the pile foundation to generate vertical additional settlement. The displacement of the foundation pit supporting structure will result in horizontal displacement in the surrounding soil mass, thereby generating horizontal additional load in the adjacent pile foundation and causing horizontal displacement of the pile foundation.
Disclosure of Invention
An object of the utility model is to solve prior art not enough, provide a structure that reduces foundation ditch construction to closing on the pile foundation influence, through setting up the pressure water pocket, reduce the influence to neighbouring pile foundation production.
In order to realize above-mentioned purpose, design a structure that reduces foundation ditch construction to closing on pile foundation influence, treat the foundation ditch of construction and be equipped with the recess between the pile foundation that closes on, the recess in be equipped with pressure water pocket, the inner chamber that has one in the pressure water pocket and is used for filling liquid, just the surface of pressure water pocket be equipped with the business turn over water valve of a UNICOM to inner chamber, pressure water pocket have three layer construction, from interior to exterior be inlayer, tensile middle level and elasticity skin in proper order, the inlayer make by the material that has gas tightness and water proofness.
The inner layer is made of PVC or TPU material.
The tensile middle layer is made of high polymer propylene, PET or other polyester materials.
The elastic outer layer is made of rubber materials.
The depth of the groove is 3/4 of the depth of the foundation pit.
The distance between the groove and the pile foundation is not less than 0.5 m and not more than 1 m, and the width of the groove is within 300 mm.
The recess for one encircle set up in the hoop recess that closes on the hoop outside of pile foundation.
The length of each side of the annular groove is matched with the length of one pressure water bag, so that each side of the annular groove can just contain one pressure water bag.
Near side recess is equipped with near side recess near one side of foundation ditch near the foundation ditch, just near side recess both ends to keeping away from the direction of foundation ditch be equipped with the extension recess.
The groove is internally provided with a plurality of pressure water bags which are connected with each other in sequence along the arrangement direction of the groove.
Compared with the prior art, the utility model, composite structure is simple feasible, easily installs and dismantles, and its advantage lies in: under intensive urban area carries out the foundation ditch construction condition, can effectively reduce the negative friction that foundation ditch precipitation produced in leading to neighbouring pile foundation through the setting of recess and pressure water pocket, can effectively reduce the influence of the horizontal displacement of the soil body on every side that foundation ditch construction arouses simultaneously to neighbouring pile foundation, through filling the water energy application pressure or reduce pressure to the pressure water pocket, with the horizontal displacement of the soil body that produces in the weakening foundation ditch work progress, thereby can reduce the influence of foundation ditch excavation to peripheral building by a wide margin, construction cost is reduced, construction efficiency is improved, realize the safe quick construction of intensive urban area foundation ditch, and the pressure water pocket can also fold the collection after draining, be convenient for deposit and transport the back reuse.
Drawings
Fig. 1 is a schematic view of a structure for reducing the influence of foundation pit construction on adjacent pile foundations according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a structure for reducing the effect of foundation pit construction on adjacent pile foundations of the present invention in one embodiment;
FIG. 3 is a schematic structural view of a pressurized water bladder according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a pressurized water bladder of the present invention in one embodiment;
in the figure: 1. the steel structure concrete pile foundation comprises an annular groove 2, a bridge pile foundation 3, a foundation pit 4, a near side groove 5, an extension groove 6, a building pile foundation 7, a pile foundation 8, a pressure water bag 8-1, a water inlet and outlet valve 8-2, an elastic outer layer 8-3, a tensile middle layer 8-4 and an inner layer 9.
Detailed Description
The structure and principle of such a device will be apparent to those skilled in the art from the following further description of the invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the construction of the foundation pit, the vertical settlement and the horizontal displacement of the soil body around the foundation pit can be caused due to the precipitation of the foundation pit and the displacement of the supporting structure, particularly under the condition of carrying out the foundation pit construction in a dense urban area, the vertical settlement and the horizontal displacement will cause the influences of settlement, extra load and the like on the pile foundation of the adjacent building, therefore, the embodiment provides a structure for reducing the influence of foundation pit construction on the adjacent pile foundation, a groove is arranged between a foundation pit to be constructed and an adjacent pile foundation, a pressure water bag is arranged in the groove, the pressure water bag is provided with an inner cavity filled with liquid, reduce the transmission of horizontal load through the pressure water pocket to adaptability adjustment, still help reducing the foundation ditch precipitation in addition and lead to the burden frictional resistance of the vertical direction that produces in the adjacent pile foundation, be particularly useful for reducing the influence of foundation ditch construction to adjacent overhead bridge embedded rock pile.
Referring to fig. 1, for the bridge pile foundation in the precipitation influence area, like the left bridge pile foundation in fig. 1, the hoop that encircles the bridge pile foundation is provided with end-to-end hoop recess, makes the pressure water pocket seal the setting around the bridge pile foundation, preferably, in this embodiment, the projection of hoop recess on the horizontal plane is a square, and the length at every side border of square suits with the length of a pressure water pocket for each side homoenergetic at the hoop recess just in time can place a pressure water pocket. And to the pile foundation not in precipitation influence area, like the building pile foundation on fig. 2 right side, the building pile foundation is kept away from foundation ditch one side and is not in precipitation influence area, consequently only is close to one side of foundation ditch at the building pile foundation, and the left side in this embodiment is provided with near side recess promptly, just near side recess around both ends to the direction of keeping away from the foundation ditch be equipped with the extension recess to the pressure water pocket only sets up in precipitation influence area, with the influence of laying to the building pile foundation of reduction pressure water pocket.
And a plurality of pressure water bags which are mutually connected front and back are sequentially arranged in the grooves along the arrangement direction of the grooves, and the length of each pressure water bag in the vertical direction is slightly larger than the depth of each groove, so that the grooves can be filled with the pressure water bags after the pressure water bags are filled with liquid. Referring to fig. 2, the depth of the groove is determined according to the depth of the foundation pit, and is not generally deeper than the depth of the foundation pit, and preferably, the depth of the groove is set to 3/4 of the depth of the foundation pit. The distance between the groove and the pile foundation is not less than 0.5 m and not more than 1 m, the width of the groove is not too large, and the width is controlled within 300 mm.
With reference to fig. 3 and 4, an inner cavity for filling liquid is formed in the pressure water bag, an opening communicated with the inner cavity is formed in the surface of the pressure water bag, a water inlet and outlet valve is arranged at the opening to control opening and closing of the opening so as to realize water filling and water discharging operations, the pressure water bag is of a three-layer structure and sequentially comprises an inner layer, a tensile middle layer and an elastic outer layer from inside to outside, and the inner layer is made of a material with air tightness and water tightness. In the embodiment, the elastic outer layer is made of rubber material, the tensile middle layer is made of high polymer propylene, PET or other polyester materials, and the inner layer is made of PVC or TPU materials.
The using steps are as follows:
(1) firstly, a groove is dug between a foundation pit to be constructed and an adjacent pile foundation.
(2) Then, pressure water bags which are mutually connected are arranged in the grooves in a segmented mode, the width of each pressure water bag is 3 m, and the length of each pressure water bag in the vertical direction is slightly larger than the depth of each groove.
(3) And then filling water into the pressure water bag to enable the pressure water bag to fill the groove, wherein the flowability of the liquid in the pressure water bag is used for weakening the static friction force in the vertical direction caused by the vertical settlement of the soil body in the foundation pit construction process.
(4) Pressure is applied or reduced by charging and discharging water into the pressure water bag, so that the horizontal displacement of the soil body generated in the foundation pit construction process is weakened.
(5) After the foundation pit construction is completed, the pressure water bag is taken out after liquid in the pressure water bag is pumped out, and then the groove is backfilled to partially recover the frictional resistance on the periphery of the pile, and the pressure water bag can be recycled.
Claims (10)
1. The utility model provides a reduce structure of foundation ditch construction to closing on pile foundation influence, its characterized in that is being equipped with the recess between the foundation ditch of treating the construction and closing on the pile foundation, the recess in be equipped with pressure water pocket, the inner chamber that has a and is used for the filling liquid in the pressure water pocket, just the surface of pressure water pocket be equipped with the business turn over water valve of a UNICOM to inner chamber, pressure water pocket three layer construction has, from interior to exterior is inlayer, tensile middle level and elasticity skin in proper order, the inlayer make by the material that has gas tightness and water proofness.
2. The structure for reducing the influence of foundation pit construction on adjacent pile foundations as claimed in claim 1, wherein said inner layer is made of PVC or TPU material.
3. The structure for reducing the influence of foundation pit construction on the adjacent pile foundation as claimed in claim 1, wherein said tensile intermediate layer is made of polyester material.
4. A structure for reducing the impact of foundation pit construction on adjacent pilings as claimed in claim 1 wherein the resilient outer layer is formed from a rubber material.
5. The structure for reducing the impact of foundation pit construction on adjacent pilings as claimed in claim 1, wherein the depth of said recess is 3/4 times the depth of said pit.
6. The structure for reducing the influence of foundation pit construction on the adjacent pile foundations as claimed in claim 1, wherein the distance between the groove and the pile foundations is not less than 0.5 m and not more than 1 m, and the width of the groove is within 300 mm.
7. The structure for reducing the influence of foundation pit construction on the adjacent pile foundation as claimed in claim 1, wherein said groove is a circumferential groove disposed around the circumferential outer side of the adjacent pile foundation.
8. The structure for reducing the influence of foundation pit construction on the adjacent pile foundations as claimed in claim 7, wherein the length of each side of the circumferential groove is adapted to the length of one pressure water bag, so that exactly one pressure water bag can be accommodated on each side of the circumferential groove.
9. The structure for reducing the influence of foundation pit construction on the adjacent pile foundation as claimed in claim 1, wherein a near side groove is formed at one side of the adjacent foundation pit near the foundation pit, and extension grooves are formed at both ends of the near side groove in the direction away from the foundation pit.
10. The structure for reducing the influence of foundation pit construction on the adjacent pile foundations as claimed in claim 1, wherein a plurality of pressure water bags are sequentially arranged in the groove along the arrangement direction of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020662674.9U CN212506438U (en) | 2020-04-27 | 2020-04-27 | Structure for reducing influence of foundation pit construction on adjacent pile foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020662674.9U CN212506438U (en) | 2020-04-27 | 2020-04-27 | Structure for reducing influence of foundation pit construction on adjacent pile foundation |
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| CN212506438U true CN212506438U (en) | 2021-02-09 |
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| CN202020662674.9U Active CN212506438U (en) | 2020-04-27 | 2020-04-27 | Structure for reducing influence of foundation pit construction on adjacent pile foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424727A (en) * | 2020-04-27 | 2020-07-17 | 中铁上海工程局集团华海工程有限公司 | Structure for reducing influence of foundation pit construction on adjacent pile foundation and construction method |
-
2020
- 2020-04-27 CN CN202020662674.9U patent/CN212506438U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424727A (en) * | 2020-04-27 | 2020-07-17 | 中铁上海工程局集团华海工程有限公司 | Structure for reducing influence of foundation pit construction on adjacent pile foundation and construction method |
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