Waste mud compaction device and waste mud compaction method

Abstract

The invention discloses a waste mud compaction device and a waste mud compaction method. The waste mud compaction device comprises waste mud and a cofferdam. Drain boards are arranged in the waste mudin the transverse direction or in the slightly transversely skewing direction, and the distance between the drain board on the highest layer and the top surface of the waste mud is 3.5-5 m. A water permeable connecting body communicating with the drain boards is arranged on the side, close to the mud, of the cofferdam, and the water permeable connecting body is connected with a drain pipe. Waterin the waste mud is drained sequentially through the drain boards, the water permeable connecting body and the drain pipe under a vacuum environment. According to the waste mud compaction device and the waste mud compaction method, the problem that drain boards are bent in the prior art is solved, and the vacuum pressure transfer effect is better; by means of the characteristic that the mud is impervious to water and air, vacuum films need not be arranged, construction convenience is greatly improved, cost is saved, and the environment is protected; and the settlement amount can reach 30-60% of the thickness of a treated soil layer, the compression amount is very large, an anti-bending drain passageway or thick cotton thread or plastic blind drain for soft soil solidification is selected to serve as the water permeable connecting body, and thus unblocking can be kept even under the conditions of the large settlement amount and the dynamic compaction effect.

Description

technical field [0001] The invention relates to a soil compaction structure, in particular to a waste mud compaction device and a waste mud compaction method. Background technique [0002] At present, in the treatment of waste sludge such as silt, slag sludge, sludge, and project discharge mud, vacuum preloading methods are often used. As shown in Figure 1 (a), the cofferdam 1 forms a space on the original ground 8, and the space in this space Fill the waste mud 9, after the mud filling is completed, vertically set the drainage board 5 on the top of the mud surface, set the drainage branch pipe 3 (small circle in the figure) and the main drainage pipe 2, lay the sealing film 10, and finally use the vacuum pump 6 to pump the main drainage pipe 2 Vacuum for vacuum preloading. There are following problems in this method: (1) the drainage channel is connected to the atmosphere and must be isolated with an airtight sealing film, but laying the sealing film 10 on the waste mud su...

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Problems solved by technology

There are following problems in this method: (1) the drainage channel is connected to the atmosphere and must be isolated with an airtight sealing film, but laying the sealing film 10 on the waste mud surface is not only complicated but also costly, and the sealing film is not easy to degrade or It is difficult to degrade and will pollute the environment to a certain extent; (2) The mud sinks a lot during the vacuum preloading treatment, causing the drainage board to bend, which greatly hinders the transmission of the vacuum degree, such as Figure 1(b) , 1(c) As shown, in order to easily see the shape of the bent drainage plate, the outline of the bent drainage plate is depicted with lines in Figure 1(c); (3) The bearing capacity of the mud after vacuum preloading is still low, and the later settlement (4) The wrapping force of the mud is small when the drainage board is installed, which often causes the problem of pulling back, resulting in insufficient length of the drainage board

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