Low-level prepressing drainage dynamic consolidating soft soil foundation processing method

Abstract

The present invention discloses a soft soil foundation treatment construction method by adopting low-position precompressed dewatered dynamic compaction process. It is characterized by that said method includes the following steps: firstly, building horizontal dewatering network on the foundation surface; then placing vertical dewatering body in the soft soil layer, inserting said vertical dewatering body into the bottom portion of soft soil layer; setting water-collecting wells around the periphery of said soft soil foundation, and making them be communicated with water-collecting channel of precompressed zone edge; back-filling broken stone soil and rolling by layers.

Description

Technical field: [0001] The invention relates to a foundation treatment technology for construction engineering, and is a new method of soil foundation treatment, specifically, a low-level preloading drainage dynamic compaction method "soft soil foundation treatment method. Background technique: [0002] The existing foundation treatment methods are not effective in dealing with soft soil foundations, which also directly affects the construction quality of buildings. Such as: the existing dynamic drainage consolidation method, the depth of soft soil treatment is small; the water collection well is outside the preload range, which is not convenient for management and maintenance; the water collection well cannot continue to be used during the period of dynamic compaction and ground buildings; the settlement after construction is large. In the high vacuum compaction method, the backfill soil (or sand) needs to be dewatered by intubation; the backfill is limited by the particle...

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Problems solved by technology

[0002] The existing foundation treatment methods do not work well on soft soil foundations, which also directly affects the construction quality of buildings

Such as: the existing dynamic drainage consolidation method, the depth of soft soil treatment is small; the water collection well is outside the preloading range, which is not convenient for management and maintenance; the water collection well cannot continue to be used during the period of dynamic compaction and ground buildings; the settlement after construction is large

In the high vacuum compaction method, the backfill soil (or sand) needs to be dewatered by intubation; the backfill is limited by the particle size; the post-construction settlement is large; the drainage cost is high; the strength of the hard shell is not high due to the limited particle size of the fill

The low-level vacuum layered pre-compression compaction method requires intubation for drainage; the backfill soil (or sand) is limited by the particle size; the pre-press drainage must use a vacuum pump for drainage, and the power cost is high; the cost is high; low soil strength

Compared with surcharge preloading, the construction period is long; the surface rebound modulus and strength are low; the post-construction settlement is large

Compared with vacuum preloading, it is necessary to use a jet pump to drain water, which is expensive; the surface density is low and the strength is small; the settlement after construction is large

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