A sheet pile shore wall structure with stepped reinforcement on deep soft soil foundation

Abstract

The invention discloses a sheet pile and bulkhead wall structure for deep soft soil foundation stepped reinforcement. The sheet pile and bulkhead wall structure is characterized in that an upper bearing platform is arranged on a pile foundation composed of front-row piles and stirring piles; a reinforcement area and a landside reinforcement area are arranged on the two sides of the front-row piles correspondingly; an anchor structure is arranged on the landside reinforcement area; the water-side reinforcement area and the landside reinforcement area are a rectangular reinforcement area and a stepped reinforcement area which are formed by arranging cemented soil stirring piles or high-pressure jet grouting piles in a grating-shaped or full manner; and the anchor structure is formed by anchoring and connecting a pull rod and the upper bearing platform. Compared with the prior art, while the high soil blocking / water blocking height is achieved, stress and displacement of a soil blocking / water blocking bulkhead wall structure are reduced, the later-period creep residual deformation is reduced, the foundation bearing capacity is improved, the project amount and the manufacturing cost are decreased, the water stopping and leakage stoppage effects are greatly improved, and the sheet pile and bulkhead wall structure is particularly suitable for being used for dock wall projects in deep soft soil foundations with bulkhead wall front edges needing dry operation conditions.

Description

technical field [0001] The invention relates to the technical fields of dock walls, harbor wharves, coastal soil retaining, water stop, etc., and in particular relates to a sheet pile shore wall structure suitable for stepped reinforcement treatment of deep and thick soft soil foundations. Background technique [0002] With the development of southern coastal cities such as the Pearl River Delta and the Yangtze River Delta, the construction of southern coastal industrial areas and shipyards has continued to expand. The geological conditions of southern coastal cities are generally poor, especially in the Pearl River Delta, Yangtze River Delta, Fujian and other places where there are often relatively thick silt and silty soil distribution, and deep soft soil areas, especially under the geological conditions of deep silt layers, due to soft soil The soil quality has the characteristics of high water content, high compressibility, high sensitivity and low strength. In order to...

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Problems solved by technology

In addition, with the increase of the size of the ship and the increase of the development demand of the deep-water port, the height difference between the retaining wall and the quay wall continues to increase, and the sheet pile structure is prone to flaring, kicking instability, and overall slope instability.

[0003] The application of existing technology in soft soil foundation has small structural bearing capacity, high earth pressure behind the wall in the retaining area, large creep residual deformation in the later stage, and poor stability, especially for deep and thick soft soil foundation behind sheet piles. and plugging effect, the project cost is high, which cannot meet the requirements of large-scale dock and deep-water development of the wharf

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