Foundation treatment method of dredging filling weak area

Abstract

The invention discloses a foundation treatment method for dredging and filling weak areas, which comprises the following steps: step 1, dredging soft soil to form a first dredging filling layer; step 2, vacuum preloading treatment; step 3, first dredging filling layer Set a plurality of first steel pipes at intervals; step 4, fill gravel into the first geotechnical bag; step 5, set a horizontal plate, and grout to form a plurality of first gravel piles; step 6, arrange a plurality of second steel pipes at intervals , dredge soft soil to form the second dredge fill layer; step 7, fill gravel into any second steel pipe, and carry out vacuum preloading treatment; step 8, set a third steel pipe on the second steel pipe, blow fill soft soil soil to form the third dredging fill layer; step 9, repeat steps 7 to 8 to form the Nth dredging fill layer to reach the set height; step 10, perform vacuum preloading treatment; step 11, form multiple first Two gravel piles. The invention has the beneficial effects of good reinforcement effect, high foundation bearing capacity and uniform 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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