Vacuum preloading soft soil foundation treatment method

Abstract

The invention discloses a vacuum preloading soft soil foundation treatment method. The vacuum preloading soft soil foundation treatment method includes the steps that at least three different-processing-depth layers in a to-be-treated soft soil foundation is each provided with at least three vertical vacuum pressure observation holes, pressure measurement pipes are arranged in the vacuum pressure observation holes, vacuum manometers are connected to the upper ends of the pressure measurement pipes, and ground surface settlement observation points are arranged at the positions, close to hole openings of the vacuum pressure observation holes, of the surface of the to-be-treated soft soil foundation, an information construction method is achieved, and construction decision making is more scientific and reasonable; as an intermittent type vacuum preloading control state is started after the stratum vacuum pressure field formation stage and the ground surface rapid sedimentation stage are finished and the stable sedimentation stage is started, and the intermittent pump stopping and pump starting circulation operation is repeatedly carried out, the vacuum drainage consolidation efficiency can be improved, the construction period is shortened, power consumption can be reduced in the same construction period, and meanwhile foundation softening after vacuum preloading treatment is reduced.

Description

technical field [0001] The invention relates to a soft soil foundation treatment technology, in particular to a vacuum preloading soft soil foundation treatment method, which can solve the problems of softening, low vacuum drainage consolidation efficiency, long construction period, and high energy consumption. Background technique [0002] With the rapid development of economic construction and the continuous expansion of construction scale in my country's coastal areas, the construction land is becoming more and more scarce. Therefore, land reclamation from the sea has become the main way to solve the problem of land shortage caused by urban construction and expansion in coastal areas. At present, a large number of new technologies and achievements have been applied to land reclamation projects, among which the vacuum preloading method has been widely used because of its remarkable effect and more environmental protection. However, the existing vacuum preloading method h...

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Problems solved by technology

However, the existing vacuum preloading method has the following two problems: the first problem is that the soft soil softens after vacuuming; the second problem is that the reinforcement efficiency is not very high

Regarding the problem of low reinforcement efficiency, it is mainly because the soft soil accumulated on the surface of the drainage board during the reinforcement process blocks the effective discharge of water in the soil, and the current solution to this problem is to increase the vacuuming time

However, increasing the vacuuming time to solve the problem of softening and / or the problem of low reinforcement efficiency will lead to the problem of high energy consumption

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