CN218932867U

CN218932867U - Construction structure of caisson with bottom at water collection pit and elevator shaft

Info

Publication number: CN218932867U
Application number: CN202223350990.0U
Authority: CN
Inventors: 张明雨; 赵亮粤; 袁文博; 张广钰; 侯全君; 相佳斌
Original assignee: Risesun Construction Engineering Co ltd
Current assignee: Risesun Construction Engineering Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-04-28
Anticipated expiration: 2032-12-14

Abstract

The utility model provides a construction structure of a caisson with a bottom at a water collecting pit and an elevator shaft, which comprises a caisson and a caisson base groove, wherein the caisson is arranged in the caisson base groove, a small water collecting pit is built at the center of the bottom of the caisson base groove, a dense mesh net is arranged at the outer side of the small water collecting pit, and stones are filled between the outer side of the dense mesh net and soil; the U-shaped steel bars are welded on the outer side wall of the caisson, the lifting rings are welded on the four corners of the top end of the caisson, a hole is formed in the center of the bottom of the caisson, a seamless steel pipe is welded, the bottom of the seamless steel pipe extends into a small water collecting pit, a water stop ring is welded in the middle of the seamless steel pipe, the upper height of the seamless steel pipe is equal to the thickness of a cushion layer and is equal to +700, and a valve is arranged. The bottom of the caisson is provided with the connecting valve for precipitation, construction is not needed by adding precipitation wells around the caisson, the balance weight is prevented from being added at four corners of the top of the caisson, and potential safety hazards are reduced. The construction is simple, the operability is strong, and the construction efficiency is improved.

Description

Construction structure of caisson with bottom at water collection pit and elevator shaft

Technical Field

The utility model belongs to the technical field of construction engineering, and particularly relates to a construction structure of a caisson with a bottom at a water collecting pit and an elevator shaft.

Background

In the foundation pit construction process, because the groundwater level of a part of construction sites is higher, although the groundwater level is reduced to 500mm below the elevation of the raft plate through well point precipitation, the foundation of the elevator shaft and the water collecting pit is always still below the water level, normal construction cannot be performed, precipitation construction cost is high by adding precipitation wells around the foundation pit, and the waterproof quality and the waterproof effect of the basement are directly affected because the precipitation wells at the part are not treated in place. Moreover, the sand layer has soil quality, and collapse and sand flow are very easy to occur during construction. The construction conditions increase the construction difficulty of the elevator shaft.

Disclosure of Invention

The utility model provides a construction structure of a caisson with a bottom at a water collecting pit and an elevator shaft, which can effectively solve the problems.

In order to solve the problems, the utility model adopts the following technical scheme: a construction structure of a caisson with a bottom at a water collecting pit and an elevator shaft comprises a caisson and a caisson base groove, wherein the caisson is arranged in the caisson base groove, a small water collecting pit is built at the center of the bottom of the caisson base groove, a dense mesh net is arranged at the outer side of the small water collecting pit, and stones are filled between the outer side of the dense mesh net and soil; the U-shaped steel bars are welded on the outer side wall of the caisson, the lifting rings are welded on the four corners of the top end of the caisson, a hole is formed in the center of the bottom of the caisson, a seamless steel pipe is welded, the bottom of the seamless steel pipe extends into a small water collecting pit, a water stop ring is welded in the middle of the seamless steel pipe, the upper height of the seamless steel pipe is equal to the thickness of a cushion layer and is equal to +700, and a valve is arranged.

Further, the side length or diameter of the small water collection pit is 500mm, the depth is less than or equal to 500mm, and the wall thickness is 120mm.

The thickness of the caisson steel plate is 6mm; the longitudinal and transverse spacing of the U-shaped steel bars is less than or equal to 500mm, and the dimensions of the U-shaped steel bars are 200mm in length and 20mm in diameter; the diameter of the hanging ring is phi 10, and the length of the hanging ring is 200mm; the diameter of the seamless steel tube is 25mm.

Further, the seamless steel pipe is separated from the bottom of the small water collecting pit by 100mm, water filtering holes are arranged within the range of 200mm of the end head, the distance is 20mm, and 8mm holes are drilled; the water stop ring is a steel plate processing water stop ring with the thickness of 3mm, and the width of the outer ring is not less than 50mm.

Further, the outer side of the water filtering hole is wrapped by a fine steel wire mesh.

The utility model has the beneficial effects that:

the bottom of the caisson is provided with the connecting valve for precipitation, construction is not needed by adding precipitation wells around the caisson, the balance weight is prevented from being added at four corners of the top of the caisson, and potential safety hazards are reduced. The construction is simple, the operability is strong, and the construction efficiency is improved.

Drawings

FIG. 1 is a schematic view of the structure of a caisson according to the present utility model;

FIG. 2 is a schematic diagram of the utility model caisson in combination with a caisson base tank;

FIG. 3 is a schematic diagram of a small sump structure of the caisson foundation trench of the present utility model;

wherein: A. a caisson; 1. u-shaped reinforcing steel bars; 2. a hanging ring; 3. a seamless steel pipe; 4. a water stop ring; 5. a valve; 6. a water filtering hole; 7. a waterproof layer; 8. a dense mesh net; 9. stones; 10. a cushion layer; 11. a well wall.

Detailed Description

The present application is described in further detail below with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model.

Examples:

1. the excavation size of the foundation trench of the caisson is the upper opening size of the steel plate caisson A plus the width of concrete pouring. After the earthwork of the foundation trench of the caisson is excavated to the bottom elevation, a small water collecting pit with the side length or diameter of 500mm, the depth of less than or equal to 500mm and the wall thickness of 120mm is built at the center position of the bottom, so that the water level is ensured to be below 500mm of the bottom surface of the foundation. The outside of the small-sized water collection pit is provided with a dense mesh net 8, and stones 9 are filled between the outside of the dense mesh net 8 and soil to form a permeable layer.

2. The size of the upper opening and the lower opening of the steel plate caisson A is the design size of the elevator shaft and the water collecting pit plus the thickness of the waterproof and waterproof protective layer. The thickness of the steel plate is 6mm, the longitudinal and transverse spacing is less than or equal to 500mm, U-shaped steel bars 1 with phi 20 and 200mm length are welded on the outer side wall of the caisson A, lifting rings 2 with phi 10 and 200mm length are welded on the four corners of the top end of the caisson A, a hole is formed in the center of the bottom of the caisson A, a seamless steel pipe 3 with the diameter of 25mm is welded, the bottom of the seamless steel pipe 3 stretches into a small water collecting pit (100 mm away from the bottom of the pit, water filtering holes 6 are punched in the range of 200mm end, the spacing is 20mm, 8mm holes are drilled, the outer side of the caisson A is wrapped by a fine mesh steel wire net to prevent mud blockage), a water stop ring 4 is welded in the middle of the caisson A (the steel plate with the thickness of 3mm is not less than 50 mm), the upper height is the thickness of a cushion layer +700, and a valve 5 is arranged.

3. Before the caisson A is in place, a caisson A position control line is discharged outside the fertilizer groove of the caisson A according to the design, and the hoisting position and elevation of the caisson A in place are required to meet the design requirements.

4. After the caisson A is lifted and positioned, the valve 5 is opened and connected with the overhanging water pump to carry out precipitation, and concrete with the same cushion mark is poured around the caisson. Concrete is poured in layers along the periphery of the caisson, and the pouring height of each layer is less than or equal to 500mm. And (3) after the first step of pouring is finished, correcting the position A of the caisson again, and if displacement occurs, correcting in time.

The bottom of the caisson A is provided with the connecting valve 5 for precipitation, construction is not needed by adding precipitation wells around the caisson A, the addition of counterweights at four corners of the top of the caisson is avoided, and potential safety hazards are reduced. The construction is simple, the operability is strong, and the construction efficiency is improved.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. The utility model provides a pit, elevator shaft department have a caisson construction structure, includes caisson (A) and caisson foundation ditch, caisson (A) are arranged in caisson foundation ditch, its characterized in that: a small water collecting pit is built in the center of the bottom of the foundation tank of the caisson, a dense mesh net (8) is arranged at the outer side of the small water collecting pit, and stones (9) are filled between the outer side of the dense mesh net (8) and soil;

the novel water-stop type caisson is characterized in that U-shaped steel bars (1) are welded on the outer side wall of the caisson (A), lifting rings (2) are welded on the four corners of the top end of the caisson (A), a hole is formed in the center of the bottom of the caisson (A), a seamless steel pipe (3) is welded, the bottom of the seamless steel pipe (3) stretches into a small water-collecting pit, a water-stop ring (4) is welded in the middle of the seamless steel pipe (3), the upper portion of the seamless steel pipe (3) is +700 in thickness of a cushion layer, and a valve (5) is arranged.

2. The construction structure of a pit and elevator shaft with a bottom caisson according to claim 1, wherein: the side length or diameter of the small water collecting pit is 500mm, the depth is less than or equal to 500mm, and the wall thickness is 120mm.

3. The construction structure of a pit and elevator shaft with a bottom caisson according to claim 1, wherein: the thickness of the steel plate of the caisson (A) is 6mm; the longitudinal and transverse spacing of the U-shaped steel bars (1) is less than or equal to 500mm, and the dimensions of the U-shaped steel bars are 200mm in length and 20mm in diameter; the diameter of the hanging ring (2) is phi 10, and the length of the hanging ring is 200mm; the diameter of the seamless steel tube (3) is 25mm.

4. The construction structure of a pit and elevator shaft with a bottom caisson according to claim 1, wherein: the seamless steel pipe (3) is arranged at a distance of 100mm from the bottom of the small water collecting pit, water filtering holes (6) are formed within a range of 200mm from the end head, the distance is 20mm, and 8mm holes are drilled; the water stop ring (4) is a steel plate processing water stop ring (4) with the thickness of 3mm, and the width of the outer ring is not less than 50mm.

5. The construction structure of a pit and elevator shaft with a bottom caisson according to claim 4, wherein: the outside of the water filtering holes (6) is wrapped by a fine steel wire mesh.