CN217679207U

CN217679207U - Underground structure Cheng Jiangshui wellhead plugging structure

Info

Publication number: CN217679207U
Application number: CN202221578399.8U
Authority: CN
Inventors: 肖体昌; 杨秋驰; 任莉灵; 李政; 张锐
Original assignee: 11th Construction Co ltd Of Sichuan Province
Current assignee: Sichuan Huaxi Yibin Construction Co.,Ltd.
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-28
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses an underground works Cheng Jiangshui well head block structure belongs to deep basal pit construction technical field, including locating the precipitation well in the foundation that permeates water, the well head of precipitation well is equipped with the well lid, the precipitation well top is equipped with the reservation steel pipe that draws water of the well lid that runs through the precipitation well, draws water and reserves and be equipped with the seal ring between the well lid of steel pipe and precipitation well, it is equipped with and is used for confined steel pipe plug cap to draw water and reserve the steel pipe top. The utility model discloses precipitation well head block structure can stop precipitation well head and precipitation well head surrounding edge and seal the back and appear seepage phenomenon, can take only to seal the well head concrete and do not seal the precipitation well outlet, connects groundwater out more than the water-resistant board top, adds the automatic long-term precipitation decompression of a ware that utilizes groundwater pressure again, alleviates the damage of groundwater pressure counter-current water board and the outer shear wall concrete structure of basement through precipitation.

Description

Underground structure Cheng Jiangshui wellhead plugging structure

Technical Field

The utility model belongs to the technical field of the deep basal pit construction, concretely relates to underground works Cheng Jiangshui well head block structure.

Background

When the foundation pit is excavated, the underground water level is higher than the excavation ground, and underground water can continuously seep and gush into the pit, so that the foundation pit can be constructed under a dry condition, and foundation pit dewatering work is required to be performed to prevent slope instability, basic quicksand, pit bottom uplift, pit bottom piping and foundation bearing capacity reduction. The main dewatering methods include open ditch dewatering with water collecting well, light well point dewatering, jet well point dewatering, electroosmosis well point dewatering, deep well point dewatering, etc. The deep well point is a method for lowering water in foundation pit support, which has the advantages of large water displacement, large lowering depth, large lowering range and the like, and because the lowering water is carried out on the periphery of underground engineering (basement) in many underground basic engineering, the influence on surrounding buildings, underground pipelines, roads and the like is possible, a water-resistant plate is additionally arranged in the water-resistant plate in case of the condition, and the plugging measure should be considered in the reserving mode of the well head of the water-lowering well; after the precipitation period of the foundation pit reaches the design construction height requirement, the precipitation well needs to be plugged in time, and the safety of construction and use is guaranteed.

With the increasing number of high-rise and water (lake, river, sea) side building projects, a plurality of anti-floating precipitation wells are additionally arranged in underground buildings, after the anti-floating precipitation meets the design requirements, the water-resistant plate concrete at the position of a precipitation well mouth is plugged, and the existing precipitation well plugging method is as follows: filling a crushed stone material into the dewatering well, filling the crushed stone material to the bottom of the foundation mat, pouring waterproof concrete into the pre-embedded waterproof steel sleeve, and welding and plugging the upper port of the waterproof steel sleeve by using a flange cover. The plugging method has the defect of poor sealing property, and the water seepage phenomenon can occur on the raft concrete foundation layer. The reason is that: after the waterproof concrete in the waterproof steel sleeve solidifies, can take place the shrink, make and form the gap between waterproof steel sleeve's inner wall and the waterproof concrete, after precipitation well water level rises again, can ooze from this gap, enter into raft upper portion, ponding still can appear when serious, has seriously influenced high-rise building's safe handling.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an underground worker Cheng Jiangshui well head block structure to solve the problem that provides in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an underground works Cheng Jiangshui well head block structure, is including locating the precipitation well in the foundation that permeates water, the precipitation well head is equipped with the well lid, the precipitation well top is equipped with the reservation steel pipe that draws water that runs through the precipitation well lid, draws water and reserves and be equipped with the seal ring between steel pipe and the precipitation well lid, it is equipped with and is used for confined steel pipe block cap to draw water to reserve the steel pipe top.

Further preferably, the water pumping reserved steel pipe is provided with a water drainage branch pipe, and the water drainage branch pipe is connected with the water pumping reserved steel pipe through a flange. The body self-draining resists the pressurized water during construction.

Preferably, the steel pipe plugging cap is a steel pipe clamping type blind plate plugging cap or a steel pipe external thread plugging cap. Different plugging caps are selected according to different diameters of the pipe orifices.

Preferably, the inner wall of the dewatering well is provided with a well wall water permeable net. The construction and installation of the water permeable net are simple and convenient, the material is environment-friendly, and the water permeable efficiency and the pressure bearing capacity are high.

Preferably, a sealing rubber pad is arranged in the steel pipe plugging cap.

Preferably, the well lid kneck of the water pumping reserved steel pipe and the dewatering well is provided with a waterproof coiled material. And engineering leakage is avoided.

Preferably, the water stop ring is positioned on a water-resistant plate concrete layer. The water infiltration route is prolonged.

Preferably, the thickness of the well cover is 6mm.

Preferably, the thickness of the water stop ring is 4mm.

Draining water during basement construction, sequentially according to the design of a precipitation scheme, arranging a precipitation well during construction, arranging a water permeable net on a well wall, specially manufacturing a well cover, controlling the height of a water stop ring at the middle position of a water-resistant plate concrete layer, treating and pumping water by a waterproof coiled material to reserve a well cover interface of a steel pipe and a precipitation well, sealing a seam by a material-compatible sealing material, reinforcing steel bars at the well mouth, spacing pumping water to the outside of a basement by a self-priming pump during construction to backfill of earthwork at the surrounding edge of the basement, backfilling earthwork outside the basement, connecting the water-pumping reserved steel pipe with a drainage branch pipe, flowing water from the drainage branch pipe into the water-collecting well of the basement, removing the drainage branch pipe after construction, filling gravel into the precipitation well (the precipitation can seal the precipitation well by reaching the construction height required by design), adding a water-stopping rubber pad in a steel pipe cap cover for sealing, selecting a steel pipe buckling type blind plate blocking cap when the diameter D of a pipeline opening is greater than 80mm, selecting a steel pipe external thread blocking cap when the diameter D of the pipeline opening is less than or equal to 80mm, installing a steel pipe surface layer steel pipe, and adopting concrete with a water-resistant plate and adding a concrete expanding agent for sealing concrete at the same level after water-resistant plate.

The utility model discloses precipitation well head block structure can stop precipitation well head and precipitation well head surrounding edge and seal the back and appear seepage phenomenon, can take and only seal well head concrete and do not seal the precipitation well outlet, connect groundwater more than the water-resistant plate top, add the automatic long-term precipitation decompression of a ware that utilizes groundwater pressure again, alleviate groundwater pressure through precipitation and confront the damage of water board and the outer shear wall concrete structure of basement, the rubble is irritated and is filled the precipitation well and ensure that the ground below the water-resistant plate does not produce the cavity, collapse, fill noncondensing and seal the well head before unblocked and spill over groundwater, concrete seals before the precipitation well head with the well head after the water-tight, carry out the first reinforced concrete of water-resistant plate again and pour the construction, can ensure sealed concrete construction quality like this, the purpose once more is that sealed well head concrete surface is more pleasing to the eye.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the basement drainage of the present invention;

FIG. 3 is a schematic diagram of the drainage in the main body construction of the present invention;

fig. 4 is a schematic view of an embodiment of the present invention;

FIG. 5 is a schematic view of the present invention in a closed state;

parts and numbering in the figures:

1-a dewatering well; 2-well cover; 3, pumping water to reserve a steel pipe; 4-a water stop ring; 5-steel pipe blocking cap; 6-a branch drain pipe; 7-waterproof board concrete layer.

Detailed Description

The following further describes the present invention with reference to the drawings and examples, but not to limit the present invention, and any technical solutions based on the transformation or inference of the present invention all belong to the protection scope of the present invention.

Example one

As shown in fig. 1, a Cheng Jiangshui wellhead plugging structure for underground works, including locating the precipitation well 1 in the foundation that permeates water, the wellhead of precipitation well 1 is equipped with well lid 2, the precipitation well 1 top is equipped with the water pumping reservation steel pipe 3 that runs through the well lid 2 of precipitation well 1, is equipped with the seal ring 4 between the water pumping reservation steel pipe 3 and the well lid 2 of precipitation well 1, the water pumping reservation steel pipe 3 top is equipped with and is used for confined steel pipe blanking cap 5.

Preferably, the inner wall of the dewatering well 1 is provided with a well wall water permeable net. The construction and installation of the water permeable net are simple and convenient, the material is environment-friendly, and the water permeable efficiency and the pressure bearing capacity are high.

Preferably, a sealing rubber pad is arranged in the steel pipe plugging cap 5.

Preferably, the interface of the pumping reserved steel pipe 3 and the well lid 2 of the dewatering well 1 is provided with a waterproof coiled material. And engineering leakage is avoided.

Preferably, the water stop ring 4 is positioned on a water-resistant plate concrete layer 7. The water infiltration route is prolonged.

Preferably, the thickness of the well cover 2 is 6mm.

Preferably, the thickness of the water stop ring 4 is 4mm.

If fig. 2, drainage during the basement construction, according to the design of precipitation scheme in proper order, set up the precipitation well during the construction, the net that permeates water is installed to the wall of a well, purpose-built well

lid

2, 4 high controls of seal ring are at water resistant slab concrete layer 7 intermediate positions, adopt waterproofing membrane to handle the well lid 2 kneck that draws water reservation steel pipe 3 and precipitation well 1, adopt the compatible sealing material of material nature to seal the seam, well head department carries out the reinforcing bar and strengthens, adopt the spacing pumping of self priming pump to the underground during construction basement to basement surrounding side earth stone backfill.

Example two

The utility model provides an underground works Cheng Jiangshui well head block structure, is including locating precipitation well 1 in the foundation that permeates water, 1 well head of precipitation well is equipped with well

lid

2, 1 top of precipitation well is equipped with the water pumping reservation steel pipe 3 that runs through the well lid 2 of precipitation well 1, is equipped with seal ring 4 between the well lid 2 of water pumping reservation steel pipe 3 and precipitation well 1, the 3 tops of water pumping reservation steel pipe are equipped with and are used for confined steel pipe blanking cap 5.

Further preferably, the pumping reserved steel pipe 3 is provided with a drainage branch pipe 6, and the drainage branch pipe 6 is connected with the pumping reserved steel pipe 3 through a flange. The body self-draining resists the pressurized water during construction.

Preferably, the steel pipe plugging cap 5 is a steel pipe buckle type blind plate plugging cap or a steel pipe external thread plugging cap.

Preferably, a water-stopping rubber pad is arranged in the steel pipe plugging cap 5.

Preferably, the 2 knecks of the well lid of the steel pipe 3 and dewatering well 1 are reserved for pumping water and are provided with waterproof coiled materials. And engineering leakage is avoided.

Preferably, the water stop ring 4 is positioned on the water-resistant concrete layer 7. The water infiltration route is prolonged.

Preferably, the thickness of the well cover 2 is 6mm.

Preferably, the thickness of the water stop ring 4 is 4mm.

As shown in the figures 3-5, the underground chamber is backfilled with earthwork, a drainage branch pipe 6 is connected with a water pumping reserved steel pipe 3, underground water gushes from the drainage branch pipe 6 to flow into a basement water collecting well for pumping water by a submersible pump, after construction, a dewatering well 1 is sealed, the dewatering well 1 is filled with gravel (the construction height of dewatering reaches the design requirement can seal the dewatering well), the drainage branch pipe 6 is dismantled, a water-stopping rubber pad is added into a steel pipe plug cap 5 to seal, when the diameter D of a pipeline opening is larger than 80mm, a steel pipe buckling type blind plate plug cap is selected, when the diameter D of the pipeline opening is smaller than or equal to 80mm, a steel pipe external thread plug cap is selected, concrete is poured for the first time to the elevation of a water-resistant plate bottom plate, a water-resistant plate surface layer steel pipe is installed, and after the concrete is poured for the first time and finally set, the concrete is sealed by adding a swelling agent higher than the water-resistant plate concrete.

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 it; 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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides an underground works Cheng Jiangshui well head block structure, is including locating precipitation well (1) in the foundation that permeates water, its characterized in that, the well head of precipitation well (1) is equipped with well lid (2), precipitation well (1) top is equipped with draws water and reserves steel pipe (3) of well lid (2) of running through precipitation well (1), draws water and reserves between well lid (2) of steel pipe (3) and precipitation well (1) to be equipped with seal ring (4), it is equipped with and is used for confined steel pipe plug cap (5) to draw water to reserve steel pipe (3) top.

2. The underground Cheng Jiangshui wellhead plugging structure of claim 1, wherein a water draining branch pipe (6) is arranged on the water pumping reserved steel pipe (3), and the water draining branch pipe (6) is connected with the water pumping reserved steel pipe (3) through a flange.

3. The underground Cheng Jiangshui wellhead plugging structure of claim 1, wherein the steel pipe plugging cap (5) is a steel pipe snap-in blind plate plugging cap or a steel pipe external thread plugging cap.

4. The underground construction Cheng Jiangshui wellhead plugging structure of claim 1, wherein a well wall water penetration net is arranged on the inner wall of the dewatering well (1).

5. The underground Cheng Jiangshui wellhead plugging structure of claim 1, wherein a water-stopping rubber pad is arranged in the steel pipe plugging cap (5).

6. The underground construction Cheng Jiangshui wellhead plugging structure of claim 1, wherein a waterproof coiled material is arranged at the interface of the pumping reserved steel pipe (3) and the well lid (2) of the dewatering well (1).

7. The underground Cheng Jiangshui wellhead plugging structure of claim 1, wherein the water stop ring (4) is located on a water resistant slab concrete layer (7).

8. The underground Cheng Jiangshui wellhead plugging structure of any one of claims 1-7, wherein the well lid (2) is 6mm thick.

9. The underground Cheng Jiangshui wellhead plugging structure of any one of claims 1-7, wherein the water stop ring (4) is 4mm thick.