Deep strengthening method of vacuum electroosmosis dewatering and low-energy dynamic compaction

Abstract

The invention discloses a deep densification method for a vacuum electro osmosis precipitation and a lower energy dynamic consolidation and its construction procedures comprises (1) a vacuum well point precipitation, (2) the vacuum electro osmosis precipitation, (3) the lower energy dynamic consolidation, (4) a vibration rolling and a leveling field, characterized in that a field drainage system should be first constructed before the vacuum well point precipitation proceeded. The method of constructing the field drainage system is that the middle coarse sand bedding is spread on the field, and the bedding which is thicker than 40 centimeters is consisted of a horizontal drainage with a drainage drain, while a plastic drain-board is inserted in the sand bedding and keeps distance of 0.8-1.4 meters between adjacent boards, and the length of the plastic drain-board is equal with a fastening depth, thereby constructing a vertical drainage system, and then a clay layer is spread and compacted on the bedding. An intact drainage system consists of the middle coarse sand bedding and the plastic drain-board in the invention, therefore deep and shallow soft soil is all strengthened, and the power of the lower energy dynamic consolidation is increased thereby expanding the effect depth of the lower energy dynamic consolidation and realizing the deep soft soil fastened.

Description

technical field [0001] The invention relates to a civil engineering foundation reinforcement method, in particular to a comprehensive reinforcement method for large-area soft soil foundations, which is suitable for foundations such as silt, silty clay, etc. Stabilization of silt and silty soil foundations. Background technique [0002] In construction engineering, it is necessary to strengthen the foundation, especially for soft soil or soft soil with a large water content, it is necessary to carry out precipitation and reinforcement treatment. [0003] In the southern and coastal areas of my country, there are extensively weak clay layers deposited in marine, lacustrine and river facies. This kind of soil is characterized by high water content, high compressibility, low strength and poor water permeability. Under the action of building loads, it will Considerable settlement and settlement difference are produced. For this kind of foundation, especially for large-scale const...

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Problems solved by technology

However, the disadvantage of the above method is that the reinforcement depth of the construction method is small. On the one hand, the range of action of vacuum well point dewatering and vacuum electroosmotic dewatering is usually within 6 meters in depth. It must not be too large, otherwise, due to the slow dissipation of excess pore water pressure, "rubbery soil" will easily appear. Therefore, the above method is mainly suitable for treating shallow soft soil not greater than 6 meters, and it is difficult to treat soft soil with a greater depth

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