Novel partial deep layer pressurizing type vacuum preloading soft soil foundation processing method

Abstract

The invention relates to a novel partial deep layer pressurizing type vacuum preloading soft soil foundation processing method. According to the technical scheme, the method comprises a vertical drainage system, a transverse drainage system, vacuum extraction equipment, a pressurizing system, pressurizing equipment and a sealing system; a vertical drainage board adopts a novel anti-clogging drainage board, the vertical drainage board is divided into two parts to be driven, one part is driven into a soil body, and the other part is exposed out of the surface of the soil body. The technology enables a deep soil body to obtain higher air pressure, enables a larger pressure difference to be formed among the deep soil body, an upper soil body and the vertical drainage board, and enables the free water in the deep soil body to fast flow to the upper soil body and the drainage boards. In addition, the flow direction of airflow from a jet head obliquely upwards points to the drainage boards, therefore the seepage of the pore water in the deep soil body to the drainage boards can be accelerated, and the deep soil body can obtain better reinforcement effect.

Description

technical field [0001] The invention belongs to the technical field of soft soil foundation treatment, and more specifically relates to a local deep pressurized vacuum preloading method for treating soft soil foundations, which is mainly suitable for drainage reinforcement treatment of soft soil foundations. Background technique [0002] There are a large amount of soft soil and silty soil distributed in the coastal areas along the river in my country. How to deal with the soft soil foundation to meet the needs of engineering construction has always been a technical problem. Especially in coastal areas, how to deal with deep marine soil has become one of the key technologies for transportation, ports and urban construction. [0003] Commonly used in the treatment of soft soil foundations are drainage consolidation method, replacement method, dynamic compaction method, grouting method, cement-soil mixing method, surcharge preloading method, geotechnical polymer and underpinni...

AI Technical Summary

Problems solved by technology

The existing vacuum preloading technology usually binds the vertical drainage plate with the corrugated filter tube as the horizontal drainage system to form a drainage system. The rapid increase of the lower vacuum degree is beneficial to the reinforcement of the surface soil, but it will cause a certain attenuation of the transmission of the vacuum degree to the vertical drainage board, and the loss of the vacuum degree along the transmission at the drainage board will make the inserted soil more complicated. The vacuum obtained by the deep drainage board is small, so the vacuum suction formed in the deep drainage board and the surrounding soil is less, so that the deep soil cannot be effectively reinforced

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