Drainage device and layout method for shallow silt foundation treatment

Abstract

The invention mainly discloses a drainage device for shallow silt foundation treatment. The drainage device has the technical scheme that the drainage device comprises drainage pipelines, vacuum equipment, a drainage board and a gridding screen, wherein the drainage board and the gridding screen are arranged at an interval from bottom to top, the drainage pipelines are respectively connected to the middle and both ends of the drainage board and the gridding screen, water inlet holes with microfiltration membranes are respectively formed in the pipe walls of a main drainage pipe and a secondary drainage pipe, and blockage detection devices are arranged on the side walls of the drainage pipelines. The method comprises the following steps of (1) preparing for construction; (2) partitioning a foundation; (3) laying the drainage board and the gridding screen; (4) laying the drainage pipelines; (5) installing the blockage detection devices; (6) installing a water flow sensor; (7) burying observation equipment; (8) performing vacuum drainage. The drainage device has the effects of high drainage efficiency, difficulty in blocking the drainage pipelines, convenience in checking blocked drainage pipelines, time saving, labor saving, energy conservation, environmental friendliness and cost saving, and the bearing capacity of the foundation is increased.

Description

technical field [0001] The invention relates to a drainage device and a laying method for shallow mud foundation treatment. Background technique [0002] At present, weak cohesive soil layers are widely distributed in the southeastern coastal areas of my country, with high water content, large void ratio, high compressibility, poor water permeability, low strength, long consolidation time, high sensitivity, large disturbance, and foundation bearing capacity and The stability often cannot meet the engineering requirements, even in a flowing state. This kind of foundation usually needs to take treatment measures to improve the bearing capacity of the foundation. Drainage consolidation method is the main method to deal with soft ground nowadays, among which vacuum preloading method is the most widely used method. The vacuum preloading method is to lay a sealing film on the surface of the foundation, vacuumize it through a special vacuum device, and lay a drainage board and a dr...

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Problems solved by technology

[0003] However, there are obvious defects in this method. Only relying on the drainage board for drainage, the drainage area is small and the efficiency is low. The drainage board has been buried in soft soil for a long time without being fixed, and it is easy to deform with the soil or even break, which greatly affects its performance. Drainage performance

During the drainage process of the shallow silt foundation, after the water with fine soil particles passes through the holes of the drainage plate and is discharged along the drainage pipe, some soil particles are easy to block the drainage holes of the drainage plate, and the other part of the soil particles that pass through the drainage holes Silt and silt enter the drainage pipe along the water flow, and it is easy to deposit in the drainage pipe, causing silting, hindering water penetration, deteriorating drainage effect, and finally leading to poor soil reinforcement effect

Since the drainage pipes are buried in the ground, there are a large number of them. Once the drainage pipes are clogged, it is difficult to find out the specific clogged pipes. It is necessary to check and check one by one. The detection time is long and the efficiency is low.

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