Earth rock cofferdam with functions of water seepage observation and construction water storage

Abstract

The invention relates to an earth rock cofferdam with water seepage observation and construction water storage functions. The method is suitable for the technical field of civil engineering. The technical problem to be solved by the application is to provide an earth rock cofferdam with functions of water seepage observation and construction water storage. According to the technical scheme, the earth rock cofferdam with the functions of water seepage observation and construction water storage comprises an earth rock cofferdam body; the plastic drainage belts are uniformly distributed in the earth rock cofferdam body, the first ends of the plastic drainage belts penetrate into a foundation below the earth rock cofferdam body, and the second ends of the plastic drainage belts extend out of the downstream slope surface of the earth rock cofferdam body; and the drainage ditch is arranged at the downstream cofferdam foot of the earth rock cofferdam body, is positioned below the second end of the plastic drainage belt, and is provided with a measuring weir and a gate.

Description

Technical Field

[0001] The present invention relates to an earth-rock cofferdam capable of both water seepage observation and construction water storage, and is applicable to the technical field of civil engineering. Background Art

[0002] Construction diversion is a critical technology for water conservancy and hydropower projects. Currently, the construction of pumped-storage power stations and reservoirs in China is in full swing. Project cofferdams are typically 5-20 meters high. During construction, water seepage from the cofferdams must be monitored. Excessive seepage can lead to safety hazards such as pipe bursts and weir failures. Flowmeters embedded within the cofferdams are typically used to monitor seepage. However, due to the large span of the cofferdams, monitoring points are often not fully covered. This can lead to sudden increases in cofferdam seepage, but the flowmeters may show no abnormal data. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in view of the above-mentioned problems, an earth-rock cofferdam with the functions of water seepage observation and construction water storage is provided.

[0004] The technical solution adopted by the present invention is: an earth-rock cofferdam with both seepage observation and construction water storage, comprising:

[0005] Earth-rock cofferdam body;

[0006] There are a plurality of plastic drainage belts, which are evenly distributed in the earth-rock cofferdam body, wherein the first end of the plastic drainage belt penetrates into the foundation below the earth-rock cofferdam body, and the second end of the plastic drainage belt extends out from the downstream slope of the earth-rock cofferdam body;

[0007] The drainage ditch is arranged at the downstream weir foot of the earth-rock cofferdam body, is located below the second end of the plastic drainage belt, and is equipped with a water measuring weir and a gate.

[0008] The plastic drainage strip comprises a vertical section, a steeply inclined section and a gently inclined section;

[0009] Among them, the vertical section is vertically arranged in the foundation below the earth-rock cofferdam body, the upper end of the vertical section is connected to the steeply inclined section, and the steeply inclined section gradually tilts downstream from bottom to top; the upper end of the steeply inclined section is located in the middle of the earth-rock cofferdam body and is connected to the gently inclined section, and the gently inclined section gradually tilts downward from upstream to downstream.

[0010] The junction of the steeply inclined section and the gently inclined section is determined based on a seepage curve simulated by an earth-rock cofferdam body model.

[0011] Sprayed concrete facing is provided on the downstream slope of the earth-rock cofferdam body and in the area from the weir foot to the plastic drainage belt.

[0012] The second end of the plastic drainage belt extends 10 to 20 cm from the downstream slope of the earth and rock cofferdam body.

[0013] The plastic drainage belt is replaced by a drainage flower pipe wrapped with sponge.

[0014] The beneficial effects of the present invention are as follows: the present invention collects the water flowing inside the cofferdam through a number of plastic drainage belts evenly distributed in the earth-rock cofferdam body, discharges it through the second end of the plastic drainage belt, and collects it uniformly by a drainage ditch. The drainage ditch is connected to a water measuring weir for monitoring the seepage volume, and a gate is set to store the cofferdam seepage water as construction reserve water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the embodiment.

[0016] 1. Earth-rock cofferdam body; 2. Plastic drainage board; 3. Sprayed concrete face protection; 4. Drainage ditch; 5. Anti-seepage inclined wall. DETAILED DESCRIPTION

[0017] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0018] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0019] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0020] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0021] Example 1: Figure 1 As shown, this embodiment provides an earth-rock cofferdam with the functions of water seepage observation and construction water storage, including an earth-rock cofferdam body, a plastic drainage belt and a drainage ditch.

[0022] In this example, several plastic drainage strips are evenly distributed in the earth-rock cofferdam body. The first end of the plastic drainage strip penetrates into the foundation below the earth-rock cofferdam body, and the second end of the plastic drainage strip extends out 10 to 20 cm from the downstream slope of the earth-rock cofferdam body.

[0023] In this embodiment, the plastic drainage belt is divided into sections, which are a vertical section, a steeply inclined section and a gently inclined section from the first end to the second end. The vertical section is vertically arranged in the foundation below the earth-rock cofferdam body, and the upper end of the vertical section is connected to the steeply inclined section. The steeply inclined section gradually inclines downstream from bottom to top. The upper end of the steeply inclined section is located in the middle of the earth-rock cofferdam body and is connected to the gently inclined section. The gently inclined section gradually inclines downward from upstream to downstream.

[0024] In this embodiment, the junction of the steeply inclined section and the gently inclined section is located on the seepage curve simulated by the earth-rock cofferdam body model or slightly above the seepage curve.

[0025] In this case, a drainage ditch is set at the downstream foot of the earth-rock cofferdam body. The drainage ditch is located below the second end of the plastic drainage belt and is used to receive the water discharged from the drainage belt. The drainage ditch is connected to the measuring weir and a simple gate is set. The measuring weir is used to monitor the seepage volume. When the gate is closed, the cofferdam seepage water can be stored as construction reserve water.

[0026] In this example, sprayed concrete facing is set on the downstream slope of the earth-rock cofferdam body and in the area from the weir foot to the plastic drainage belt.

[0027] Example 2: This example is basically the same as Example 1, except that a drainage flower pipe wrapped with sponge is used in this example instead of the plastic drainage belt in Example 1.

[0028] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An earth-rock cofferdam with both seepage observation and construction water storage, characterized in that: include: Earth-rock cofferdam body; There are a plurality of plastic drainage belts, which are evenly distributed in the earth-rock cofferdam body, wherein the first end of the plastic drainage belt penetrates into the foundation below the earth-rock cofferdam body, and the second end of the plastic drainage belt extends out from the downstream slope of the earth-rock cofferdam body; The drainage ditch is arranged at the downstream weir foot of the earth-rock cofferdam body, is located below the second end of the plastic drainage belt, and is equipped with a water measuring weir and a gate.

2. The earth-rock cofferdam with both seepage observation and construction water storage according to claim 1 is characterized in that: The plastic drainage strip comprises a vertical section, a steeply inclined section and a gently inclined section; Among them, the vertical section is vertically arranged in the foundation below the earth-rock cofferdam body, the upper end of the vertical section is connected to the steeply inclined section, and the steeply inclined section gradually tilts downstream from bottom to top; the upper end of the steeply inclined section is located in the middle of the earth-rock cofferdam body and is connected to the gently inclined section, and the gently inclined section gradually tilts downward from upstream to downstream.

3. The earth-rock cofferdam with both seepage observation and construction water storage according to claim 1 is characterized in that: The junction of the steeply inclined section and the gently inclined section is determined based on a seepage curve simulated by an earth-rock cofferdam body model.

4. The earth-rock cofferdam with both seepage observation and construction water storage according to claim 1 is characterized in that: Sprayed concrete facing is provided on the downstream slope of the earth-rock cofferdam body and in the area from the weir foot to the plastic drainage belt.

5. The earth-rock cofferdam with both seepage observation and construction water storage according to claim 1 is characterized in that: The second end of the plastic drainage belt extends 10 to 20 cm from the downstream slope of the earth and rock cofferdam body.

6. The earth-rock cofferdam with both seepage observation and construction water storage function according to claim 1 is characterized in that: The plastic drainage belt is replaced by a drainage flower pipe wrapped with sponge.

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