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Method for consolidating soft soil ground foundation by dynamic pre drainage consolidation method

A technology of dynamic consolidation and soft soil foundation, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of high cost, long construction period, failure to achieve the treatment purpose, etc., and achieve short construction period, convenient production and high effect Good results

Active Publication Date: 2008-11-19
HEBEI CONSTR & INVESTIGATION RES INST
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Problems solved by technology

[0002] In the construction foundation treatment technology, there are many methods for soft soil foundation treatment, including cushion replacement method, preloading method, CFG pile, cement-soil mixing method, high-pressure jet grouting method, lime pile method, etc., but these methods It has its own disadvantages and limitations in dealing with soft foundations formed by recent alluvial, land reclamation and artificial lake excavation and filling.
Generally, it is characterized by high cost, long construction period, etc., and sometimes even fails to achieve the purpose of processing

Method used

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  • Method for consolidating soft soil ground foundation by dynamic pre drainage consolidation method
  • Method for consolidating soft soil ground foundation by dynamic pre drainage consolidation method

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Embodiment Construction

[0034] The following examples illustrate the invention.

[0035] A recently dredged soft soil foundation is mainly composed of silt, with poor permeability and extremely low strength, and it is difficult for construction machinery to enter. It is required that the characteristic value of the bearing capacity of the foundation after treatment is not less than 100kpa, and the treatment depth is required to be greater than 3m. The hardening method includes the following steps:

[0036] (1) Fabrication of pre-drainage device and installation of pre-drainage system

[0037] The pre-drainage device is mainly composed of a well point pipe drainage device, a branch pipe, a water collection pipe, and a drainage power unit. Among them, the well point pipe structure of the well point pipe drainage device is as follows: figure 1 , figure 2 As shown, the well point pipe is divided into three sections from bottom to top. There is a sealing end cover 8 at the bottom of the lower section,...

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Abstract

The invention discloses a method for reinforcing a coastal recent blow filled soft ground, comprising the following steps that: firstly, a pre-drainage device is manufactured and assembled; secondly, pre-drainage is performed for the first time, and dynamic drainage measures are auxiliarily increased; thirdly, dynamic consolidation is performed for the first time; fourthly, the pre-drainage is performed for the second time; fifthly, the dynamic consolidation is performed for the second time; sixthly, the pre-drainage is performed for the third time and the drainage device is disassembled; seventhly, the dynamic consolidation is performed for the third time. The method is based on the dynamic property, the drainage consolidation mechanism and the dynamic consolidation mechanism of saturated soft soil and organically integrates the well point precipitation technology, the dynamic drainage technology and the heavy tamping dynamic consolidation technology, thereby the method guarantees the implementation and processing effects on the soft ground and has the technical and economic advantages of short construction time, low manufacturing cost and good effect.

Description

technical field [0001] The invention relates to a method for reinforcing soft ground recently filled by dredging along the coast, in particular to a method for pre-drainage dynamic consolidation and strengthening soft ground, which belongs to the technical field of civil engineering. Background technique [0002] In the construction foundation treatment technology, there are many methods for soft soil foundation treatment, including cushion replacement method, preloading method, CFG pile, cement-soil mixing method, high-pressure jet grouting method, lime pile method, etc., but these methods It has its own shortcomings and limitations in dealing with the soft foundation of newly filled soil formed by recent alluvial, land reclamation and artificial lake excavation and filling. Generally, it is manifested as high cost, long construction period, etc., and sometimes even fails to achieve the processing purpose. Therefore, finding a treatment method that can be applied to the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/12E02D19/20E02D3/046
Inventor 聂庆科胡建敏王国辉李友东张春来高飞陈军红
Owner HEBEI CONSTR & INVESTIGATION RES INST
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