Construction method of engineering foundation pre-soaking dynamic consolidation

Abstract

The invention provides a construction method of engineering foundation pre-soaking dynamic consolidation. The construction method includes the following steps that 1, the construction range is determined, and the thickness of blow filling sand is measured; 2, sites and the number of laid plastic drainage plates in the construction range are determined, and the arranged depth of the plastic drainage plates is determined; 3, the plastic drainage plates are laid, and a blow filling sand foundation is subjected to vibroflotation and drainage through a conventional vibroflot; 4, water with the preset water yield is sprayed into the construction range of the blow filling sand foundation by prefabricated pre-soaking ramming equipment so as to maintain the preset water content of the blow fillingsand foundation, then dynamic consolidation is carried out by the pre-soaking ramming equipment, and fixed point spraying of ramming points is carried out by the pre-soaking ramming equipment in the process of dynamic consolidation so as to ensure no dust; and 5, the foundation bearing capacity and liquefaction resistance performance are detected. According to the construction method of engineering foundation pre-soaking dynamic consolidation, the problems that the quality of dynamic consolidation and subsequent vibration rolling construction is affected and the environment is polluted due tothe fact that a surface layer is difficult to be compacted in the treatment process of the existing blow filling sand foundation are effectively solved.

Description

technical field [0001] The invention relates to the technical field of engineering foundations, in particular to a construction method of engineering foundations by a pre-soaked water dynamic compaction method. Background technique [0002] At present, the fourth phase of the Suzhou Port Taicang Port Area project is located on the right bank of the Baimaosha South Waterway in the lower reaches of the Yangtze River from Lang Port to Qiya Port in the Floating Bridge Operation Area of ​​the Suzhou Port Taicang Port Area, adjacent to berths 13 and 14 of the upstream third phase project. It is planned to build four 50,000-ton container berths (the hydraulic structure is designed according to the berth of a 100,000-ton container ship) and related supporting facilities, with a designed annual passing capacity of 2 million TEUs. [0003] The rear land area is made of dredged sand on the Changjiang beach, and the large area of ​​exposed topsoil in the site is made of finer grained dr...

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Problems solved by technology

[0004] In view of this, the present invention proposes a construction method of engineering foundation pre-soaked dynamic compaction method, which aims to solve the problem that the surface layer of the existing dredged sand foundation is difficult to compact during the treatment process, which affects the construction quality of dynamic compaction and subsequent vibratory rolling. After construction disturbance, it is easy to raise dust and cause environmental pollution

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