CN212000920U

CN212000920U - Steel plate core wall rock-fill dam

Info

Publication number: CN212000920U
Application number: CN201922429318.2U
Authority: CN
Inventors: 吴剑疆; 吴正桥; 王立成; 金鹏; 秦明豪; 李宁博; 杨春宝; 徐丽; 常玉龙; 王澍
Original assignee: China Water Resources Beifang Investigation Design and Research Co Ltd; China Renewable Energy Engineering Institute
Current assignee: China Water Resources Beifang Investigation Design and Research Co Ltd; China Renewable Energy Engineering Institute
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-11-24
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a steel sheet core rock-fill dam utilizes the steel sheet to replace asphalt concrete to carry out the prevention of seepage as the barrier material of dam body, and dam shell material still utilizes local materials such as rockfill material, sets up bed course or transition layer etc. between steel sheet and dam shell material. The utility model discloses an use the steel sheet to replace the concrete core wall, can prevent that the deformation of the topography geological conditions and the dam body of dam site department from to the fracture problem of leaking that the core wall caused, reduce the degree of difficulty that the core wall leaked water and detected and repaired, get rid of the work progress that artifical paving or machinery paved for the construction progress can effectively improve prevention of seepage effect simultaneously under the prerequisite that does not increase construction cost, simplifies the construction measure, reduces the engineering maintenance degree of difficulty.

Description

Steel plate core wall rock-fill dam

Technical Field

The utility model relates to a core rock-fill dam, especially a steel sheet core rock-fill dam.

Background

In recent years, the asphalt concrete core wall dam is widely applied to dam engineering, and has the advantages of lower requirement on geological conditions at a dam site, capability of fully utilizing local materials, lower construction cost and higher construction speed. With the development of the technology, the dam type is continuously broken through on the height of the dam, and the maximum dam height of the asphalt concrete core wall dam reaches more than 160 meters. The asphalt concrete rockfill dam is characterized by that it adopts asphalt concrete as impervious body and utilizes rockfill material as supporting structure of dam body.

The asphalt concrete core rock-fill dam has the advantages that the requirement on dam shell materials is low, the seepage-proofing circuit is short, the core wall is slightly influenced by climate, and the defects that the topographic and geological conditions at the dam site and the deformation of the dam body have larger influence on the core wall, and the water leakage phenomenon is easy to occur because the technology of construction units is uneven and the asphalt concrete core wall is constructed layer by layer in a stacking way, particularly the pouring asphalt concrete core wall, is not compact due to aggregate separation or vibration. The problem exists in part of asphalt concrete core dams built in recent years, and after the problem occurs, the core is very difficult to detect and repair; and built dams have already had such events; the re-construction of the completed dam by digging asphalt concrete is not only difficult, but also needs to be done again after digging dam shell materials, and the repairing cost is high and the time is long.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a steel sheet core rock-fill dam is provided, adopts the steel sheet to replace asphalt concrete core, can prevent the problem of leaking that causes the core because the deformation of the topography geological conditions and the dam body of dam site department to and because the technique of construction unit is uneven the problem that leads to the core to leak. The problem of overlarge temperature stress caused by temperature change of the steel plate can be solved through water prevention, rust prevention and heat preservation by spraying polyurethane 5cm on the steel plate.

In order to solve the technical problem, the utility model discloses a technical scheme is: a steel plate core wall rock-fill dam is characterized in that a transition layer is arranged in the middle of a main rock-fill body, an anti-seepage steel plate is arranged in the transition layer, and polyurethane is sprayed on the surface of the anti-seepage steel plate.

The thickness of the anti-seepage steel plate is more than or equal to 1 cm.

The thickness of the polyurethane is more than or equal to 5cm, the heat preservation and rust prevention effects are achieved, and the excessive temperature stress of the temperature load on the steel plate and the corrosion and aging of the steel plate are prevented.

The utility model has the advantages that: the method has the advantages that the steel plate is adopted to replace the asphalt concrete core wall, the transition layers are arranged on two sides of the steel plate and are connected with the main rockfill area, and the problem of water leakage of the core wall due to topographic and geological conditions at a dam site and deformation of a dam body and the problem of water leakage of the core wall due to uneven technology of construction units can be solved. Secondly, the steel plate can be insulated by spraying a polyurethane protective layer, so that overlarge temperature stress on the steel plate caused by temperature load is prevented, and an anti-rust effect can be achieved. And thirdly, because the steel plate is a conductor, when the steel plate has water seepage, the water seepage position of the steel plate can be found through quality detection.

Drawings

Fig. 1 is a typical section view of the steel plate core rock-fill dam of the present invention.

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

as shown in figure 1, the utility model discloses a steel sheet core rock-fill dam sets up transition layer 3 in the middle of main rockfill body 4, sets up steel sheet 1 of preventing seepage in transition layer 3, steel sheet 1 surface spraying polyurethane 2 of preventing seepage.

The thickness of the anti-seepage steel plate 1 is more than or equal to 1 cm. The thickness of the polyurethane 2 is more than or equal to 5cm, the heat preservation and rust prevention effects are achieved, and the excessive temperature stress of the temperature load on the steel plate and the corrosion and aging of the steel plate are prevented.

The utility model discloses a prevention of seepage steel sheet 1 replaces traditional asphalt concrete core material, handles through addding polyurethane layer 2 and keeps warm rust-resistant, and all the other sections are arranged with traditional asphalt concrete core rock-fill dam.

In the present embodiment, after the dam foundation is excavated, foundation treatment is performed, and then the main rock-fill body 4 is first constructed by filling the adjacent rock-fill material during construction in the same manner as the conventional asphalt concrete rock-fill dam construction. After the main rockfill 4 is filled to a certain height, the construction of the steel plate 1, the polyurethane layer 2 and the transition layer 3 can be carried out until the whole construction is completed.

The material requirements of the transition layer 3, the main rock-fill body 4 and other areas are similar to those of the traditional asphalt concrete rock-fill dam, and refer to the design specifications of asphalt concrete panels and core walls of the asphalt concrete rock-fill dam (SL 501-2010).

Compared with concrete materials, the steel plate has higher cost of single materials, but has good anti-seepage effect, and basically can not seep water as long as the construction quality is good. Even if water seepage occurs due to problems of construction quality and the like, the water seepage position of the steel plate can be found through quality detection because the steel plate is a conductor. From economic analysis, assuming that a 1cm steel plate is used for replacing a 1 m concrete slab, the steel amount for the steel plate with the area of 1 square meter is 0.078t, the concrete amount for the concrete with the area of 1 square meter is 1 square, and after multiplying the two by the corresponding unit price, the difference between the two is not great, and considering the material price, the manufacturing cost of the asphalt concrete should be higher, namely the steel plate may have more advantages economically. The utility model discloses an use the steel sheet to replace the concrete core wall, can prevent but the fracture problem of leaking that the deformation of the topography geological conditions and the dam body of dam site department caused the core wall, reduce the degree of difficulty that the core wall leaked water and detected and repaired, get rid of the artifical work process that paves or machinery paves for the construction progress, under the prerequisite that can not increase construction cost again simultaneously, effectively improve prevention of seepage effect, simplify the construction measure, reduce the engineering maintenance degree of difficulty.

The above-mentioned examples are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention should not be limited by the examples, i.e. all equivalent changes or modifications made by the spirit of the present invention are still within the scope of the present invention.

Claims

1. The steel plate core wall rock-fill dam is characterized in that a transition layer (3) is arranged in the middle of a main rock-fill body (4), an anti-seepage steel plate (1) is arranged in the transition layer (3), polyurethane (2) is sprayed on the surface of the anti-seepage steel plate (1), the thickness of the anti-seepage steel plate (1) is larger than or equal to 1cm, the thickness of the polyurethane (2) is larger than or equal to 5cm, the heat preservation and rust prevention effects are achieved, and excessive temperature stress of a temperature load on a steel plate and corrosion and aging of the steel plate are prevented.