Method for improving pile foundation performance of soil-compaction piles by lateral soil-compaction, drainage and consolidation

Abstract

The invention relates to a method for improving pile foundation performance, in particular to a method for improving the pile foundation performance of soil-compaction piles by lateral soil-compaction, drainage and consolidation. The method is especially suitable for the soil-compaction piles in a slit soft-soil foundation with a high water content, and comprises the steps of before soil-compaction pile construction, inserting one or more vertical drainage bodies in the foundation between the soil-compaction piles; then, conducting the soil-compaction pile construction; utilizing the soil-compaction effect of the piles to make soil around the piles subjected to the lateral compaction, so that water is drained and the soil is consolidated. According to the method, the construction is simple, the cost is low, and the effect of improving the pile foundation performance is excellent.

Description

technical field [0001] The invention relates to a method for improving the performance of pile foundations, in particular to a method for improving the performance of pile foundations by laterally squeezing soil for drainage and consolidation. . Background technique [0002] Soil or water-retaining structures built on soft soil foundations, such as retaining walls, sluice lock chambers, ship locks, navigation walls, etc., need to bear large horizontal loads due to the requirements of retaining soil or water. In order to meet the anti-sliding stability requirements of such soil retaining or water retaining structures, it is generally necessary to treat the foundation. [0003] Soil-squeezed piles are a commonly used ground treatment method, including precast concrete piles, steel pipe piles, and immersed pipe piles. Soil-squeezing piles refer to piles in which a large amount of soil is squeezed during the pile-forming process, causing the soil around the pile to be severely...

AI Technical Summary

Problems solved by technology

[0005] (1) The lateral resistance of the foundation soil around the pile is an important factor affecting the horizontal bearing capacity of the pile, while the soil lateral resistance index of the high moisture content silt soft soil is low, resulting in a small horizontal bearing capacity of the pile;

[0006] (2) The soil squeezing effect during the pile forming process may cause quality accidents such as broken piles and necking of cast-in-situ piles. For precast concrete piles or steel pipe piles, it may cause piles to float, reduce bearing capacity, and increase negative effects such as settlement.

However, when a large number of piles need to be arranged in the foundation foundation of a soil-retaining or water-retaining building, in order to meet the requirements of the center distance of the piles, the foundation plane will be large, resulting in a large area of ​​the foundation, a large amount of excavation, and a high cost. advanced disadvantages;

[0007] (3) Due to the low permeability of silt soft soil foundation with high water content and slow consolidation, the consolidation after construction may cause the building foundation to be separated from the soil, and the consolidation will produce negative friction on the pile foundation and other unfavorable phenomena

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