上海地区深古河道静压桩施工异常分析与对策

Analysis and Countermeasures of Construction of Press-in Pile Anomaly in Deep Ancient River Bed Area in Shanghai

进入深古河道地层的静压桩基础是上海地区常见的桩基础形式,但在实践中常会遇到设计参数无法符合施工实际的情况。究其原因,由于深古河道区域地层成因复杂,会在工程尺度上呈现明显离散性,由此导致依据地勘成果形成的设计参数与实际工况不吻合。本文以某项目的静压桩施工为例,从勘察、设计、施工各方面对引起异常工况的可能原因做了分析,并从施工角度提出合理的解决和优化方案,对上海地区深古河道区域静压桩施工有一定借鉴意义。

The press-in pile foundation entering the deep ancient river formation is a common form of pile foundation in Shanghai, but in practice, the design parameters can not conform to the actual construction situation. The reason is that because of the complex stratigraphic causes in the deep ancient river area, it will be obviously discrete on the engineering scale, and the design parameters formed according to the geological prospecting results are not consistent with the actual working conditions. This paper takes the construction of press-in piles in a project as an example, analyzes the possible causes of the abnormal working conditions from the survey, design and construction parties, and puts forward a reasonable solution and optimization scheme from the perspective of construction, which has some reference significance for the construction of press-in piles in the deep ancient river area in Shanghai.