Earth and rockfill dam for simulating piping dam break test

Abstract

The invention relates to an earth and rockfill dam for simulating a piping dam break test. The earth and rockfill dam comprises a dam body which is built by rock materials, wherein a weak layer capable of generating a piping channel is laid at a set position of the dam body according to the test requirement; a water pipe which penetrates through the dam body is arranged in the weak layer; through holes which are distributed along the axial direction at intervals are formed in a pipe wall of the water pipe; and the water pipe which is positioned at the upstream end of the dam body is provided with a valve. During test, water is injected into the water pipe so as to wash the weak layer, so that the formation of piping channel inside the dam body is simulated and accelerated. The field piping test development time can be controlled, and the phenomena that the field test fails even an unexpected sudden dam break event occurs and losses of life and property are caused because the piping channel formation time cannot be controlled are avoided.

Description

technical field

[0001] The invention relates to an earth-rock dam, in particular to an earth-rock dam used in a simulated piping dam break test. Background technique

[0002] my country has built more than 88,000 reservoir dams and more than 6.4 million small ponds and dams, of which more than 90% are earth-rock dams. These reservoirs have been built for a long time, many of which were built by local farmers themselves. The hydrological series is short, and the flood control storage capacity and flood discharge capacity of the reservoirs are underestimated. The design and construction standards of many reservoirs are low. Once a dam failure occurs, it will bring serious damage to the downstream. disaster. According to statistics, the proportion of piping failure in earth-rock dam failure events is as high as 29%, which is one of the main reasons for earth-rock dam failure.

[0003] However, because the piping failure process of earth-rock dams is accompanied by complex pro...

Examples

Embodiment 1

[0022] according to figure 1 , figure 2 and image 3 As shown, the present invention includes a dam body 1 . The dam body 1 is mainly formed by stacking earth and rock materials on the dam foundation, the elevation of the top of the dam body 1 is 8m, and the water level above the dam is 7.6m.

[0023] In the test plan, the position where the piping channel appears is preset at a height of 1m relative to the dam foundation. Therefore, a weak layer 2 mainly composed of sand is laid at a position 1m high from the dam foundation in the dam body 1 (of course, other materials that are easy to be lost under the scouring action of water flow can also be used for laying), and the depth of the weak layer 2 is 0.6 m, the width is 1.5m, and the sand is fine sand with a fineness modulus of 2.2-1.6.

[0024] In the weak layer 2, a water pipe 3 with a diameter of 30 cm is buried, and the water pipe 3 runs through the dam body 1 along the upstream and downstream directions of the dam bod...

Embodiment 2

[0030] according to figure 1 , figure 2 and image 3 As shown, the present invention includes a dam body 1 . The dam body 1 is mainly formed by stacking earth and rock materials on the dam foundation, the elevation of the top of the dam body 1 is 8m, and the water level above the dam is 7.6m.

[0031] In the test plan, the position where the piping channel appears is preset at a height of 1m relative to the dam foundation. Therefore, a weak layer 2 mainly composed of sand is laid at a position 1m high from the dam foundation in the dam body 1 (of course, other materials that are easy to be lost under the action of water flow can also be used for laying), and the depth of the weak layer 2 is 0.6m , the width is 1.5m, and the sand is fine sand with a fineness modulus of 2.2-1.6.

[0032] In the weak layer 2, a water pipe 3 with a diameter of 20 cm is embedded, and the water pipe 3 runs through the dam body 1 along the upstream and downstream directions of the dam body 1.

...

technical field

[0001] The invention relates to an earth-rock dam, in particular to an earth-rock dam used in a simulated piping dam break test. Background technique

[0002] my country has built more than 88,000 reservoir dams and more than 6.4 million small ponds and dams, of which more than 90% are earth-rock dams. These reservoirs have been built for a long time, many of which were built by local farmers themselves. The hydrological series is short, and the flood control storage capacity and flood discharge capacity of the reservoirs are underestimated. The design and construction standards of many reservoirs are low. Once a dam failure occurs, it will bring serious damage to the downstream. disaster. According to statistics, the proportion of piping failure in earth-rock dam failure events is as high as 29%, which is one of the main reasons for earth-rock dam failure.

[0003] However, because the piping failure process of earth-rock dams is accompanied by complex pro...

Examples

Embodiment 1

[0022] according to figure 1 , figure 2 and image 3 As shown, the present invention includes a dam body 1 . The dam body 1 is mainly formed by stacking earth and rock materials on the dam foundation, the elevation of the top of the dam body 1 is 8m, and the water level above the dam is 7.6m.

[0023] In the test plan, the position where the piping channel appears is preset at a height of 1m relative to the dam foundation. Therefore, a weak layer 2 mainly composed of sand is laid at a position 1m high from the dam foundation in the dam body 1 (of course, other materials that are easy to be lost under the scouring action of water flow can also be used for laying), and the depth of the weak layer 2 is 0.6 m, the width is 1.5m, and the sand is fine sand with a fineness modulus of 2.2-1.6.

[0024] In the weak layer 2, a water pipe 3 with a diameter of 30 cm is buried, and the water pipe 3 runs through the dam body 1 along the upstream and downstream directions of the dam bod...

Embodiment 2

[0030] according to figure 1 , figure 2 and image 3 As shown, the present invention includes a dam body 1 . The dam body 1 is mainly formed by stacking earth and rock materials on the dam foundation, the elevation of the top of the dam body 1 is 8m, and the water level above the dam is 7.6m.

[0031] In the test plan, the position where the piping channel appears is preset at a height of 1m relative to the dam foundation. Therefore, a weak layer 2 mainly composed of sand is laid at a position 1m high from the dam foundation in the dam body 1 (of course, other materials that are easy to be lost under the action of water flow can also be used for laying), and the depth of the weak layer 2 is 0.6m , the width is 1.5m, and the sand is fine sand with a fineness modulus of 2.2-1.6.

[0032] In the weak layer 2, a water pipe 3 with a diameter of 20 cm is embedded, and the water pipe 3 runs through the dam body 1 along the upstream and downstream directions of the dam body 1.

...

Images