CN210621729U

CN210621729U - Concrete heavy-calibre sump pit structure

Info

Publication number: CN210621729U
Application number: CN201920902974.7U
Authority: CN
Inventors: 刘晓艳; 米雨萌; 阎伟; 佟亚龙; 焦文龙
Original assignee: Hebei Research Institute of Investigation and Design of Water Conservancy and Hydropower
Current assignee: Hebei Research Institute of Investigation and Design of Water Conservancy and Hydropower
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-05-26
Anticipated expiration: 2029-06-14

Abstract

The utility model discloses a concrete heavy-calibre sump pit structure belongs to dyke and dam body seepage prevention and infiltration technical field, is located dykes and dams low reaches or in the dam overburden for reduce artesian head and osmotic pressure, a serial communication port, concrete heavy-calibre sump pit structure includes at least: the well casing is formed by pouring concrete, the inner diameter of the well casing is not less than 800mm, a water permeable hole is formed in the side wall of the well casing, the lower end of the well casing is buried in a water permeable stratum, and wellhead concrete is poured around the upper end of the well casing; the geotextile is wrapped on the outer wall of the well pipe; and the anti-filtering body is positioned outside the geotextile. The utility model discloses a water seepage is collected through the sump pit structure, can reduce dam body and dyke, in order to reduce artesian head and osmotic pressure in dykes and dams low reaches or dam inner cover layer to prevent to take place a well casing drainage and seepage facility of phenomenons such as piping and flowing soil, swamp. The water collected in the large-diameter water collecting well can be used by surrounding villagers.

Description

Concrete heavy-calibre sump pit structure

Technical Field

The utility model belongs to the technical field of dyke and dam body prevention of seepage and infiltration, especially, relate to a concrete heavy-calibre sump pit structure.

Background

It is known that the dam is a vital component in the hydraulic engineering, and the safety of the dam is directly related to the safety of the hydraulic engineering, wherein the leakage problem of the dam is always a focus of attention, whether the new dam or the prior dams have some leakage problems more or less, and the leakage problem is particularly obvious in some reservoirs built in early years. The leakage of the dam not only can influence the life production and the life of downstream residents, restricts the exertion of other benefits of the project, but also causes great hidden danger to the safety of the dam.

The water collecting well is widely applied to the problem of water seepage at the downstream of a dam, and can be combined with facilities such as a drainage ditch, a drainage pump and the like to collect and discharge the seepage water. Although the water collecting well is often used for solving the problem of dam leakage, the function of the water collecting well is undoubted, however, the water collecting well used in most of the prior engineering is of a sand-free pipe structure, has small pipe diameter and general water permeability, can collect only a small amount of seepage water and needs to be removed in time, so that the design and development of a concrete large-caliber water collecting well structure which can solve the leakage and can be used as a water well is particularly important.

Disclosure of Invention

Problem to prior art existence, the utility model provides a concrete heavy-calibre sump pit structure, this concrete heavy-calibre sump pit structure can reduce the harm of dykes and dams seepage, can realize the function of well simultaneously.

The utility model discloses a realize like this, a concrete heavy-calibre sump pit structure is arranged in dykes and dams low reaches or dam inner cover layer for reduce artesian head and osmotic pressure, concrete heavy-calibre sump pit structure includes at least:

the well casing (1) is formed by pouring concrete, the inner diameter of the well casing (1) is not less than 800mm, the side wall of the well casing (1) is provided with water permeable holes (2), the lower end of the well casing (1) is embedded into a water permeable stratum (6), and the periphery of the upper end of the well casing (1) is poured with wellhead concrete (4);

the geotechnical cloth (5) is wrapped on the outer wall of the well pipe (1);

the anti-filtering body (3) is positioned on the outer side of the geotextile (5).

Further, the geotextile (5) is an N layer, and N is a natural number larger than 0.

Further, the thickness of the anti-filter body (3) is 500 mm.

Further, the inlet height of each water permeable hole (2) is smaller than the outlet height, wherein the inlet is positioned on the outer wall of the well pipe (1) and the outlet is positioned on the inner wall of the well pipe (1).

By adopting the technical scheme, the utility model discloses following advantage has:

the concrete well pipe wall of the utility model is provided with permeable holes, the pipe wall is wrapped with geotextile, the periphery of the well pipe is provided with the reverse filter body which can filter soil and drain water, not only can prevent protected soil from being separated out along with seepage water, but also can ensure that the seepage water can be smoothly discharged, so that seepage energy of the dam can be released, and the drainage and pressure reduction effects can be achieved; the geotextile can play a role in filtering, so that seepage water enters the water collecting well through the water permeable holes, effectively prevents water inlet and water permeable holes such as soil particles and fine sand, can prevent the clogging of the water permeable holes and the water collecting well, and can ensure the water quality in the water collecting well. The drainage holes are formed in the pipe wall of the concrete well pipe, the distance between the water permeable holes can be determined according to the leakage condition of a dam, the water permeability can be adjusted, and the pipe diameter of the concrete well pipe can be properly selected according to the leakage quantity and the requirement of a villager on the well.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

wherein: 1. a well pipe; 2. water permeable holes; 3. an anti-filter body; 4. concrete at the well mouth; 5. geotextile; 6. a permeable formation.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

For further explanation of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings:

referring to fig. 1, a concrete large-diameter sump pit structure located at a downstream of a dam or in a cover layer in the dam for reducing a confined water head and an osmotic pressure, includes:

the well casing comprises a well casing 1 formed by pouring concrete, wherein the inner diameter of the well casing 1 is not less than 800mm, a water permeable hole 2 is formed in the side wall of the well casing 1, the lower end of the well casing 1 is embedded into a water permeable stratum 6, and wellhead concrete 4 is poured around the upper end of the well casing 1;

the geotextile 5 is wrapped on the outer wall of the well pipe 1;

an anti-filter body 3 located outside the geotextile 5.

Preferably, in order to improve the quality of the obtained geotextile, the geotextile 5 is an N layer, and N is a natural number greater than 0.

The thickness of the body 3 of anti-filter is 500 mm.

The inlet height of each water permeable hole 2 is smaller than the outlet height, wherein the inlet is located on the outer wall of the well casing 1 and the outlet is located on the inner wall of the well casing 1. Because the inlet height of the permeable hole is smaller, the difficulty of the tiny impurities in the water entering the well pipe can be increased to the maximum extent in the permeation process, and the water quality in the well pipe is improved.

The main structure and working principle of the above preferred embodiment: mainly comprises a well pipe 1 and an anti-filtering body 3; the wall of the concrete well pipe is provided with a drain hole 2, and the periphery of the well pipe is provided with an anti-filtering body 3. When the seepage condition appears in dykes and dams low reaches, arrange the sump pit in dykes and dams low reaches leakage zone, the infiltration water accessible permeable bed passes the anti-filter body and gathers in the sump pit, and wherein the anti-filter body can filter the soil drainage, can prevent that protected soil from following the seepage water and appearing, can guarantee the unobstructed discharge of infiltration water again, makes the seepage flow energy of dykes and dams release, reaches drainage pressure reduction effect.

The interval in the hole of permeating water can be adjusted according to dykes and dams infiltration condition to reach the effect of precipitation.

The outer wall of the well pipe 1 is wrapped with the geotextile, the geotextile can play a role in filtering, water seepage can be caused to enter the water collecting well through the water permeable holes, and the water inlet and permeable holes for water seepage such as soil particles, fine sand and the like can be effectively prevented, so that clogging of the water permeable holes and the water collecting well can be prevented, and the water quality in the water collecting well can be ensured.

The concrete large-diameter water collecting well has a larger diameter, can be used as a water collecting well for reducing pressure and discharging seepage and can also be used as a water taking well for taking water from surrounding villagers, and the diameter can be selected according to different conditions.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a concrete heavy-calibre sump pit structure, is arranged in dykes and dams low reaches or dam inner cover layer for reduce artesian head and osmotic pressure, its characterized in that, concrete heavy-calibre sump pit structure includes at least:

the geotechnical cloth (5) is wrapped on the outer wall of the well pipe (1);

2. The concrete large-caliber water collecting well structure according to claim 1, wherein the geotextile (5) is N-layer, and N is a natural number more than 0.

3. Concrete heavy caliber sump well structure according to claim 1 or 2, characterized in that the thickness of the anti-filter body (3) is 500 mm.

4. A concrete heavy caliber sump well structure according to claim 3, wherein each water permeable hole (2) has an inlet height smaller than an outlet height, wherein the inlet is located at the outer wall of the well pipe (1) and the outlet is located at the inner wall of the well pipe (1).