Composite reinforcing method for combining soft foundation light well point pipe with plastic drainage plate

Abstract

The invention relates to a composite power reinforcing method for combining a soft foundation light well point pipe with a plastic drainage plate. The method comprises the following process steps of: excavating a drainage ditch; distributing light well plastic drainage well points and carrying out vacuum pumping; striking a light well point pipe, a plastic drainage plate and a peripheral seal pipe and distributing the light well plastic drainage well points on a soft foundation needing treatment, wherein the plastic drainage plate has a mechanical inserting method and a water-washing hole formation inserting method, in the mechanical inserting method, the plastic drainage plate with needed depth is inserted by adopting a plate inserting machine, after an inserting pipe of the plate inserting machine is drawn, the light well point pipe is immediately inserted into a jack of the plastic drainage plate, and the terminal of the plastic drainage plate is pressed into the ground surface below 0.5m, a sand filter material is placed into the jack to fill with the distance of 0.45-0.55m from an opening of the jack, and then the opening of the jack is tightly sealed by clay; mounting water dropping equipment; pumping vacuum for dewatering; finishing dewatering; and solidifying by power. The method can reduce the water content of a soil body of a sludge interlayer.

Description

(1) Technical field [0001] The invention relates to a soft soil foundation treatment method, in particular to a large-area soft soil foundation treatment using a light well point pipe combined with a plastic drainage plate composite well point (hereinafter referred to as: light well plastic drainage well point) reinforcement method. It is suitable for deep and shallow treatment of soft foundation with high mud content and mud interlayer in new dredger fill. It belongs to the technical field of foundation treatment. (2) Background technology [0002] At present, with the rapid development of coastal areas, tidal flats and reclamation methods are used to solve the shortage of industrial land. For the treatment of this type of soil, the "vacuum preloading method" can be applied, but this method has a long construction period (generally more than three months). Especially when the sand content of the dredger fill is high, or the sand is mixed with mud, and there are irregular ...

AI Technical Summary

Problems solved by technology

In fact, this method cannot control the optimal water content required for the soil to be reinforced by dynamic compaction, and also produces the phenomenon of "spring soil"

According to this, during the construction process, after the drainage board is inserted, supplemented with vacuum well point dewatering (light well point dewatering), through this method, the water content of the soil in the area to be reinforced can be quickly reduced, and then dynamic compaction or dynamic consolidation is carried out. However, during the construction process, a large amount of groundwater gushes out of the ground through the plastic drainage board due to the impact of the impact on the underlying layer when the well point pipe is pulled out for dynamic compaction because the end of the plastic drainage board is exposed to the ground. The reason why the dynamic reinforcement equipment cannot continue construction is that the vacuum well point dewatering cannot reduce the water content of the silt interlayer soil. After tamping, most of the free water in the silt interlayer overflows through the channel of the plastic drainage board. Muddy and unable to meet the requirements for entry of reinforced equipment

Images