Earth and rockfill dam seepage flow measuring device

Abstract

The utility model discloses an earth and rockfill dam seepage flow measuring device, and belongs to the technical field of earth and rockfill dam safety monitoring. The device comprises a seepage collecting assembly and a pipeline, the seepage collecting assembly is arranged on the downstream of the earth and rockfill dam, the upstream end of the pipeline extends into the seepage collecting assembly, the downstream end of the pipeline inclines downwards relative to the upstream end, and a seepage flow automatic detection and transmission assembly is arranged at the downstream end of the pipeline. The water level in the seepage collecting assembly is reduced through the obliquely-arranged pipeline and the river channel gradient, the purpose of reducing the upstream water level of the dam body and the height of a seepage line is achieved, and it is guaranteed that the dam is stable; the seepage flow automatic detection and transmission assembly is used for automatically detecting the seepage flow of the earth and rockfill dam and automatically transmitting the seepage flow to the reservoir dam control center in real time for recording, and when the instantaneous seepage flow collected by the seepage flow automatic detection and transmission assembly exceeds a seepage flow warning value preset by the reservoir dam control center, the seepage flow is automatically transmitted to the reservoir dam control center. And the reservoir dam control center gives an alarm to remind management personnel.

Description

Technical Field

[0001] The utility model relates to a seepage measurement device for an earth-rock dam, belonging to the technical field of earth-rock dam safety monitoring. Background Art

[0002] Real-time monitoring of seepage behind earth-rock dams is essential for the safe operation of earth-rock dams. Typically, a concrete retaining wall is built behind the dam to collect seepage, and a thin-walled weir is placed on top of the wall. Common weir cross-sectional shapes include triangle, rectangle, and trapezoid.

[0003] Concrete retaining walls can collect as much seepage as possible from a dam. However, to ensure the weir can overflow freely and avoid being affected by downstream water, the top of the concrete retaining wall is typically elevated a certain distance above the riverbed. This raises the water level and the infiltration line upstream of the dam, reducing its weight and negatively impacting dam stability. Furthermore, existing weirs require frequent inspections to monitor dam leakage and manually observe and record data, making it difficult to detect abnormal changes in seepage volume and potential seepage damage such as piping. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a seepage measurement device for an earth-rock dam.

[0005] The utility model is achieved through the following technical solutions:

[0006] A seepage flow measurement device for an earth-rock dam comprises a seepage flow collection component and a pipeline. The seepage flow collection component is arranged downstream of the earth-rock dam. The upstream end of the pipeline extends into the seepage flow collection component, and the downstream end is arranged downwardly inclined relative to the upstream end. The downstream end is provided with a seepage flow automatic detection and transmission component.

[0007] The seepage collection assembly comprises an excavated groove, and a rock backfill layer is provided in the excavated groove.

[0008] The excavation groove is formed by excavating a side slope at the downstream foot of the earth-rock dam and the downstream slope of the earth-rock dam, and a sprayed concrete layer is provided on the downstream slope of the excavation groove.

[0009] The bottom of the excavated trench and the sprayed concrete layer are both paved with anti-seepage geotextiles.

[0010] The upstream end of the pipeline passes through the downstream slope of the excavated trench and extends into the block stone backfill layer.

[0011] The upstream end of the pipeline is fixed in the block stone backfill layer by means of shotcrete blocks, and the downstream end is supported and fixed by piers.

[0012] A filter screen is provided at the upstream end of the pipeline.

[0013] The seepage flow automatic detection and transmission component comprises a flow meter, a data acquisition card and a wireless transceiver module. The flow meter is installed on the pipeline, and the data acquisition card is electrically connected to the flow meter and the wireless transceiver module.

[0014] The beneficial effects of the present invention are as follows: The automatic seepage detection and transmission component is arranged at the downstream end of the pipeline, effectively extending the seepage measurement point of the earth-rock dam to the riverbed at a certain distance behind the dam. This facilitates the use of the inclined pipeline and the river gradient to lower the water level in the seepage collection component, thereby lowering the water level upstream of the dam body and the height of the infiltration line, helping to ensure the stability of the dam. The automatic seepage detection and transmission component automatically detects the seepage of the earth-rock dam and automatically transmits the seepage in real time to the reservoir dam control center for recording. When the instantaneous seepage collected by the automatic seepage detection and transmission component exceeds the seepage warning value preset by the reservoir dam control center, the reservoir dam control center issues an alarm to alert management personnel, facilitating the timely detection of abnormal changes in seepage and seepage damage such as pipe bursts, thereby ensuring the stable and safe operation of the dam. In addition, there is no need to build a concrete retaining wall, reducing project investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] In the figure: 1-earth-rock dam, 2-rock backfill layer, 3-filter, 4-riverbed ground line, 5-seepage automatic detection and transmission component, 6-pier, 7-pipeline, 8-sprayed concrete block. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0018] like Figure 1As shown, the earth-rock dam seepage measurement device described in the present invention includes a seepage collection component and a pipeline 7. The seepage collection component is arranged downstream of the earth-rock dam 1, the upstream end of the pipeline 7 extends into the seepage collection component, and the downstream end is arranged downwardly inclined relative to the upstream end, and the downstream end is provided with a seepage automatic detection transmission component 5. Placing the automatic seepage detection and transmission assembly 5 at the downstream end of pipeline 7 effectively extends the seepage measurement point of the earth-rockfill dam 1 to the riverbed a certain distance behind the dam. This facilitates lowering the water level in the seepage collection assembly by utilizing the inclined pipeline 7 and the river channel gradient, thereby lowering the water level upstream of the dam and the height of the seepage line, thus helping to ensure dam stability. The automatic seepage detection and transmission assembly 5 automatically detects the seepage flow of the earth-rockfill dam 1 and transmits the data in real time to the reservoir dam control center for recording. When the instantaneous seepage flow collected by the automatic seepage detection and transmission assembly 5 exceeds the seepage flow warning value preset by the reservoir dam control center, the reservoir dam control center issues an alarm to alert management personnel, facilitating the timely detection of abnormal seepage flow changes and seepage damage such as piping, thereby ensuring the stable and safe operation of the dam. The upstream section of pipeline 7 is located below the riverbed ground line 4.

[0019] The seepage collection assembly comprises an excavated groove, and a rock backfill layer 2 is provided in the excavated groove.

[0020] The excavation groove is formed by excavating a side slope at the downstream foot of the earth-rock dam 1 and the downstream slope of the earth-rock dam 1, and a sprayed concrete layer is provided on the downstream slope of the excavation groove.

[0021] The bottom of the excavated trench and the sprayed concrete layer are both paved with anti-seepage geotextiles.

[0022] The upstream end of the pipeline 7 passes through the downstream slope of the excavated trench and extends into the block stone backfill layer 2.

[0023] The upstream end of the pipeline 7 is fixed in the block stone backfill layer 2 by a shotcrete block 8 , and the downstream end is supported and fixed by a buttress 6 .

[0024] A filter screen 3 is provided at the upstream end of the pipeline 7 .

[0025] The seepage automatic detection and transmission component 5 includes a flow meter, a data acquisition card and a wireless transceiver module. The flow meter is installed on the pipeline 7, and the data acquisition card is electrically connected to the flow meter and the wireless transceiver module.

Claims

1. A seepage measurement device for earth-rock dams, characterized by: The invention comprises a seepage collection component and a pipeline (7), wherein the seepage collection component is arranged downstream of the earth-rock dam (1), the upstream end of the pipeline (7) extends into the seepage collection component, the downstream end is arranged downwardly inclined relative to the upstream end, and the downstream end is provided with a seepage automatic detection and transmission component (5).

2. The earth-rock dam seepage measurement device according to claim 1, characterized in that: The seepage collection assembly comprises an excavated groove, and a rock backfill layer (2) is provided in the excavated groove.

3. The earth-rock dam seepage measurement device according to claim 2, characterized in that: The excavated groove is formed by excavating a side slope at the downstream foot of the earth-rock dam (1) and the downstream slope of the earth-rock dam (1), and a sprayed concrete layer is provided on the downstream slope of the excavated groove.

4. The earth-rock dam seepage measurement device according to claim 3, characterized in that: The bottom of the excavated trench and the sprayed concrete layer are both paved with anti-seepage geotextiles.

5. The earth-rock dam seepage measurement device according to claim 1, characterized in that: The upstream end of the pipeline (7) passes through the downstream slope of the excavated groove and extends into the block stone backfill layer (2).

6. The earth-rock dam seepage measurement device according to claim 2, characterized in that: The upstream end of the pipeline (7) is fixed in the block stone backfill layer (2) by means of a sprayed concrete block (8), and the downstream end is supported and fixed by means of a buttress (6).

7. The earth-rock dam seepage measurement device according to claim 1, characterized in that: A filter screen (3) is provided at the upstream end of the pipeline (7).

8. The earth-rock dam seepage measurement device according to claim 1, characterized in that: The seepage automatic detection and transmission component (5) comprises a flow meter, a data acquisition card and a wireless transceiver module; the flow meter is installed on the pipeline (7); and the data acquisition card is electrically connected to the flow meter and the wireless transceiver module.

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