Hydraulic reclamation soft area foundation treatment method

Abstract

The invention discloses a hydraulic reclamation soft area foundation treatment method. The method comprises the following steps that S1, hydraulic reclamation is carried out on soft soil to form a first hydraulic reclamation soil layer; S2, vacuum preloading treatment is carried out; S3, a plurality of first steel pipes are arranged in the first hydraulic reclamation soil layer; S4, first geobagsare filled with gravels; S5, a horizontal plate is arranged, and a plurality of first gravel piles are formed through grouting; S6, a plurality of second steel pipes are arranged at intervals, and hydraulic reclamation is carried out on soft soil to form a second hydraulic reclamation soil layer; S7, any second steel pipe is filled with gravels, and vacuum preloading treatment is conducted; S8, third steel pipes sleeve the second steel pipes, and and hydraulic reclamation is carried out on soft soil to form a third hydraulic reclamation soil layer; S9, the steps S7-S8 are repeated to form an Nth hydraulic reclamation soil layer to reach a set height; S10, vacuum preloading treatment is carried out; and S11, high-pressure grouting is conducted to form a plurality of second gravel piles. Themethod has the beneficial effects of being good in reinforcing effect, high in foundation bearing capacity and uniform in bearing capacity distribution.

Description

technical field [0001] The invention relates to the technical field of ground treatment. More specifically, the invention relates to a foundation treatment method for dredging and filling weak areas. Background technique [0002] With the rapid development of the economy, a large number of projects need to be carried out in the soft soil areas of the coast and along the river, but the foundations in these areas are generally difficult to meet the needs of civil engineering construction. Therefore, it is necessary to treat the foundation to make the bearing capacity meet the requirements. very important process. There are many methods for foundation treatment. Among them, the vacuum preloading method is widely used in foundation reinforcement projects in soft soil areas such as ports, sea reclamation and land reclamation, and is one of the most effective methods for treating dredged fill. [0003] At present, the vacuum preloading method is used to treat the foundation in t...

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Problems solved by technology

[0003] At present, the use of vacuum preloading method to treat the foundation in the weak area of ​​dredging fill has the problems of serious loss of vacuum degree and poor drainage and consolidation effect inside the soil; at the same time, the large settlement of the dredged fill soil will also cause vertical drainage The problem of plate deformation or even bending will further affect the effect of foundation reinforcement

Moreover, for the foundation in the weak area of ​​dredging filling with a large depth, the current foundation treatment method will have the problems that the surface of the foundation is hard and the inside is soft, the deep soil reinforcement is not enough, and the distribution of the bearing capacity of the entire foundation is extremely uneven, which will affect the quality of civil engineering and construction safety

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