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上海市地处长江三角洲下游,有很厚的冲积软土层,该土层属淤泥质粉质粘土或淤泥质粘土,具有含水量高、孔隙比大、承载力低的特性;另外,湖塘河沟暗浜密布。北新泾地区就具有上海典型的地貌、地层特征,从而给多层建筑施工带来了困难,因为多层建筑既不能像高层建筑那样大量使用桩基,又不能像低层建筑那样使用天然地基,如果在地基处理、勘察、设计、施工等方面处理不当,建筑物就会产生严重沉降或倾斜,危及建筑物安全使用。如发生事故,可采用锚杆静压桩技术进行加固处理。锚杆静压桩进行托换加固及纠偏加固施工,方法简单、占用施工场地小、施工时无振动、无嗓音、无污染、施工速度快、见效也快。
Shanghai, located in the lower reaches of the Yangtze River Delta, has a thick alluvial soft soil layer. The soil layer is silty silty clay or silty clay, with high water content, large void ratio, and low bearing capacity; The ditch is dark. The Beixinjing area has the typical landform and strata characteristics of Shanghai, which has brought difficulties to the construction of multi-story buildings, because multistory buildings cannot use pile foundations as much as high-rise buildings, nor can they use natural foundations like low-rise buildings. In improper handling of foundations, surveying, designing, construction, etc., the building will cause serious settlement or tilt and endanger the safe use of buildings. In the event of an accident, anchor rod static pressure piles can be used for reinforcement. Anchor rod static pressure piles underpinning reinforcement and rectifying and reinforcing construction, the method is simple, occupying a small construction site, no vibration, no noise, no pollution, construction speed, and quick results.