CN210341957U - Precipitation structure suitable for caisson - Google Patents
Precipitation structure suitable for caisson Download PDFInfo
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- CN210341957U CN210341957U CN201920490255.9U CN201920490255U CN210341957U CN 210341957 U CN210341957 U CN 210341957U CN 201920490255 U CN201920490255 U CN 201920490255U CN 210341957 U CN210341957 U CN 210341957U
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- well
- caisson
- precipitation
- deep well
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- 238000001556 precipitation Methods 0.000 title claims abstract description 54
- 239000002349 well water Substances 0.000 claims abstract description 18
- 235000020681 well water Nutrition 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 239000000463 material Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 5
- 241000353135 Psenopsis anomala Species 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to a precipitation structure suitable for caisson, its characterized in that combines with well interior open drainage structures by well outer deep well precipitation structure, well outer deep well precipitation structure arranges a deep well in every caisson periphery promptly, and each peripheral deep well of caisson connects through well casing and a deep well water pump and connects, and deep well water pump motor cabinet is equipped with the rubber seal circle with the well head junction, and the effective precipitation area of every well outer deep well is set for 300m2The depth of the deep well arranged on the periphery of each caisson is 18m, and the depth of precipitation reachesTo 14-16 m; the well internal open drainage structure is characterized in that a well hole is distributed in each caisson, a well pipe is vertically fixed in each well hole, the well pipe and the extended caisson are matched and connected with a deep well water pump, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well pipe opening, and the precipitation depth of a deep well in the caisson is set to be 15 m. The utility model discloses a construction method that deep well precipitation outside the well combines with well open drain has displacement, precipitation depth and plane arrangement and disturbs advantages such as little.
Description
[ technical field ]
The utility model relates to a caisson technical field, specific precipitation structure suitable for caisson that says so.
[ background art ]
In the technical field of caissons, because soil layers have high water content and poor structural property, the influence factor is fully considered in the design and construction of the caisson, and necessary precipitation measures are taken in the construction process. According to the investigation, no pollution source exists around the site, underground water has micro-corrosivity to concrete in class III environment, and when the ground is soaked in water for a long time, the ground has micro-corrosivity to reinforcing steel bars in the concrete; when alternately immersed in water, it is weakly corrosive to the reinforcing steel bars in the concrete. Groundwater is weakly corrosive to steel structures. When groundwater is slightly corrosive to concrete, the foundation soil is also slightly corrosive to concrete. In order to ensure that the caisson construction process is not influenced by underground water, a precipitation structure suitable for the caisson and a laying process thereof are urgently needed.
[ summary of the invention ]
An object of the utility model is to overcome the defect that prior art exists, provide a precipitation structure suitable for caisson and lay technology thereof
The precipitation structure is characterized in that the precipitation structure is combined with an underground open drainage structure through an underground deep well precipitation structure, namely, a deep well is arranged on the periphery of each caisson, the deep well on the periphery of each caisson is connected with a deep well water pump through a well pipe, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well mouth, and the effective precipitation area of each underground deep well is set to be 300m2The depth of a deep well arranged on the periphery of each caisson is 18m, and the depth of precipitation reaches 14-16 m;
the well internal open drainage structure is characterized in that a well hole is distributed in each caisson, a well pipe is vertically fixed in each well hole, the well pipe and the extended caisson are matched and connected with a deep well water pump, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well pipe opening, and the precipitation depth of a deep well in the caisson is set to be 15 m.
The diameter of a well hole in the caisson is 700mm, a well pipe with the diameter of 273mm is vertically fixed in a deep well forming hole, and surrounding filling draining materials are uniformly arranged on the periphery of a gap between the well pipe and the well hole.
More than 0.5m of each well bottom is provided with a filter pipe with the length of 4.0m, 4.0m below the natural ground is provided with a filter pipe with the length of 2.0m, melon seed slices and coarse sand are filled in the filter pipe to be used as filter materials, and a water suction head of a deep well pump is placed at a sand settling pipe position at the lower opening of a draining pipe so as to effectively pump underground water.
Every 2 ports of the deep well pump are connected into a group, a vacuum pump is arranged, and the pressure difference between the inside and the outside of the well is increased by vacuumizing so as to accelerate precipitation.
When earthwork is excavated, soil in the caisson is collapsed, a water collecting well is additionally arranged at a position away from a blade foot of the caisson, the depth of the water collecting well is 1-1.5 m deeper than the underground water level, the water collecting well is connected with a high-lift submersible pump, accumulated water in the water collecting well is discharged to the outside of the caisson by the high-lift submersible pump, and the depths of the water collecting well and the open trench are continuously deepened along with the excavation of the caisson.
The utility model relates to a precipitation structure suitable for caisson, the construction method that outer deep well precipitation and well interior surface drainage combine, including the inside and outside precipitation measure of caisson, adopt the outer deep well precipitation of caisson and the method that the interior surface drainage of caisson combines, especially deep well precipitation has that the displacement is big, precipitation is dark and the advantage such as the plane arrangement interference is little.
[ description of the drawings ]
FIG. 1 deep well precipitation plan
FIG. 2 is a schematic view of drainage of construction
FIG. 3 Process flow for deep well placement
Description of the drawings
1 well, 2 well pipes, 3 deep wells around the caisson, 4 open caisson.
[ detailed description of the invention ]
The technical solution of the present invention will be further described with reference to the accompanying drawings and examples, which are believed to be clear to those skilled in the art.
As shown in fig. 1-2, a precipitation structure suitable for caissons is characterized in that an outdoor deep well precipitation structure is combined with an indoor open drainage structure, the outdoor deep well precipitation structure is that a deep well is arranged at the periphery of each caisson, the deep well at the periphery of each caisson is connected with a deep well water pump through a well pipe, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well mouth, and the effective precipitation area of each outdoor deep well is set to be 300m2The depth of a deep well arranged on the periphery of each caisson is 18m, and the depth of precipitation reaches 14-16 m;
the well internal open drainage structure is characterized in that a well hole is distributed in each caisson, a well pipe is vertically fixed in each well hole, the well pipe and the extended caisson are matched and connected with a deep well water pump, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well pipe opening, and the precipitation depth of a deep well in the caisson is set to be 15 m.
The diameter of a well hole in the caisson is 700mm, a well pipe with the diameter of 273mm is vertically fixed in a deep well forming hole, and surrounding filling draining materials are uniformly arranged on the periphery of a gap between the well pipe and the well hole.
More than 0.5m of each well bottom is provided with a filter pipe with the length of 4.0m, 4.0m below the natural ground is provided with a filter pipe with the length of 2.0m, melon seed slices and coarse sand are filled in the filter pipe to be used as filter materials, and a water suction head of a deep well pump is placed at a sand settling pipe position at the lower opening of a draining pipe so as to effectively pump underground water.
Every 2 ports of the deep well pump are connected into a group, a vacuum pump is arranged, and the pressure difference between the inside and the outside of the well is increased by vacuumizing so as to accelerate precipitation.
When earthwork is excavated, soil in the caisson is collapsed, a water collecting well is additionally arranged at a position away from a blade foot of the caisson, the depth of the water collecting well is 1-1.5 m deeper than the underground water level, the water collecting well is connected with a high-lift submersible pump, accumulated water in the water collecting well is discharged to the outside of the caisson by the high-lift submersible pump, and the depths of the water collecting well and the open trench are continuously deepened along with the excavation of the caisson.
As shown in fig. 3, a layout process suitable for caisson precipitation structure is characterized by comprising the steps of layout of deep well precipitation structure outside a well and layout of open drainage structure in the well, and the process flow comprises the following steps:
the structure for lowering water of the deep well outside the well is installed,
firstly, measuring and positioning a well point, digging a well, installing a protective cylinder and protecting a wall by using clean water;
step two, each deep well is provided with a deep well water pump, the discharge capacity is 10 tons per hour, the lift is 38m, the connection part of a motor seat of the deep well pump and a well head is filled with rubber, the sealing is ensured, the air leakage is prevented, each 2 deep well pumps are connected into a group, a vacuum pump is provided, the pressure difference between the inside and the outside of the well is increased through vacuumizing, the water collecting speed is accelerated, and the precipitation effect is improved;
installing an open drainage structure in the well,
firstly, measuring and positioning a well point, and forming a well hole at the positioned well point by adopting a dry drilling method of a rotary drilling rig;
backfilling a bottom hole sand cushion layer, taking the melon seed slices and coarse sand as filter materials, and filling the draining materials uniformly around to prevent the draining materials from being discharged too quickly so as to prevent the draining materials from being emptied locally to influence the dewatering effect;
step three, hanging and putting the well pipe in the well hole, and backfilling the filter layer between the well pipe and the well hole wall
Washing the well, arranging a water pump below the well pipe, installing a water pumping control circuit, trying to pump water, normally precipitating water, pulling out the well pipe after precipitation is finished, and sealing the well;
and step seven, arranging a deep well water pump on the well pipe, wherein the discharge capacity is 10 tons per hour, the lift is 38m, a rubber is filled at the joint of a motor seat of the deep well pump and the well pipe opening, the sealing is ensured, the air leakage is prevented, every 2 openings of the deep well pump are connected into a group, arranging a vacuum pump, and increasing the pressure difference between the inside and the outside of the well through vacuumizing so as to accelerate the water collecting speed and improve the precipitation effect.
According to the water content of the well depth and the soil layer of the caisson area, a section of filter pipe with the length of 4.0m is arranged above the well bottom by 0.5m, and a section of filter pipe with the length of 2.0m is arranged at the position 4.0m below the natural ground. The water suction head of the deep well pump is arranged at the position of the sand sediment pipe at the lower opening of the draining pipe so as to effectively pump underground water.
When the earthwork is excavated and the soil body in the box is collapsible, a water collecting well is dug at the position away from the blade foot, the depth of the water collecting well is 1-1.5 m deeper than the underground water level, and the depth of the open trench and the water collecting well is continuously deepened along with the excavation of the box. The accumulated water in the water collecting well is discharged out of the caisson by a high-lift submersible pump.
Deep well precipitation scheduling
The deep well setting should be completed in the construction preparation stage. And the inspection and acceptance can be carried out after one well is installed. The setting time of the 2 deep wells is controlled to be about 2 days. And (4) carrying out pre-dewatering after the deep-well pump is installed and checked. In order to ensure the precipitation effect in the pit, the pre-precipitation time before the caisson is about 15 days. During the construction of the caisson, the precipitation should be continuously carried out, and the precipitation depth should be controlled to be about 0.5-1.0m below the bottom of the open caisson. The precipitation period should meet the design requirements.
As shown in the construction drainage schematic diagram of FIG. 2, when the excavated earthwork finds the soil body in the box to be collapsed, a water collecting well is excavated at the position away from the blade foot, and the depth of the water collecting well is 1-1.5 m deeper than the underground water level. The depth of open ditches and water collecting wells should be continuously deepened along with the excavation of soil in the tanks. The accumulated water in the water collecting well is discharged out of the caisson by a high-lift submersible pump.
Claims (5)
1. The precipitation structure is characterized in that the precipitation structure is combined with an underground open drainage structure through an underground deep well precipitation structure, namely, a deep well is arranged on the periphery of each caisson, the deep well on the periphery of each caisson is connected with a deep well water pump through a well pipe, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well mouth, and the effective precipitation area of each underground deep well is set to be 300m2The depth of a deep well arranged on the periphery of each caisson is 18m, and the depth of precipitation reaches 14-16 m;
the well internal open drainage structure is characterized in that a well hole is distributed in each caisson, a well pipe is vertically fixed in each well hole, the well pipe and the extended caisson are matched and connected with a deep well water pump, a rubber sealing ring is arranged at the joint of a motor base of the deep well water pump and a well pipe opening, and the precipitation depth of a deep well in the caisson is set to be 15 m.
2. A precipitation structure suitable for use in a caisson according to claim 1, wherein the diameter of the wellbore in the caisson is 700mm, a well casing of 273mm diameter is vertically fixed in the bore of the deep well, and surrounding material is evenly filled around the gap between the well casing and the wellbore.
3. The water lowering structure suitable for the caisson of claim 1, wherein a section of filter pipe with a length of 4.0m is arranged at more than 0.5m of each well bottom, a section of filter pipe with a length of 2.0m is arranged at a position 4.0m below the natural ground, the filter pipe is filled with melon seed slices and coarse sand as filter materials, and the water suction head of the deep well pump is placed at the position of the sand settling pipe at the lower opening of the water lowering pipe so as to effectively pump the underground water.
4. The structure of claim 1, wherein 2 deep well pumps are connected into a group, and a vacuum pump is provided to increase the pressure difference between the inside and outside of the well by pumping vacuum, thereby accelerating the precipitation.
5. The dewatering structure suitable for the caisson of claim 1, wherein the soil body in the caisson is collapsed when the earthwork is excavated, a water collecting well is additionally arranged at the position away from the caisson cutting edge, the depth of the water collecting well is 1-1.5 m deeper than the underground water level, the water collecting well is connected with a high-lift submersible pump, accumulated water in the water collecting well is discharged out of the caisson by the high-lift submersible pump, and the depths of the water collecting well and the open trench are continuously deepened along with the excavation of the soil in the caisson.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920490255.9U CN210341957U (en) | 2019-04-12 | 2019-04-12 | Precipitation structure suitable for caisson |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920490255.9U CN210341957U (en) | 2019-04-12 | 2019-04-12 | Precipitation structure suitable for caisson |
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| CN210341957U true CN210341957U (en) | 2020-04-17 |
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| CN201920490255.9U Expired - Fee Related CN210341957U (en) | 2019-04-12 | 2019-04-12 | Precipitation structure suitable for caisson |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111910664A (en) * | 2019-12-31 | 2020-11-10 | 上海绿地建设(集团)有限公司 | Precipitation structure suitable for caisson and laying process thereof |
| CN111962537A (en) * | 2019-10-18 | 2020-11-20 | 上海绿地建设(集团)有限公司 | Precipitation structure suitable for caisson and laying process thereof |
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2019
- 2019-04-12 CN CN201920490255.9U patent/CN210341957U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962537A (en) * | 2019-10-18 | 2020-11-20 | 上海绿地建设(集团)有限公司 | Precipitation structure suitable for caisson and laying process thereof |
| CN111910664A (en) * | 2019-12-31 | 2020-11-10 | 上海绿地建设(集团)有限公司 | Precipitation structure suitable for caisson and laying process thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200417 |