论文部分内容阅读
针对上海下盐公路存在浅层软土的问题,采用浅层软土就地固化方法代替传统的浅层复合地基处理方法。通过无侧限抗压强度试验并结合双层地基的承载力确定固化剂的掺量及固化厚度,再根据工程特点,对固化厚度进行优化,确定了两种不同形态的处理固化方式。介绍采用国产的简易就地浅层固化设备进行浅层软土固化时适宜的施工方法。通过现场试验结果表明,试验段现场无侧限抗压强度与室内无侧限抗压强度的比值满足设计要求,并提出采用此工艺进行施工时的设计建议值为0.36。通过现场十字板剪切强度得到地基的承载力,均能满足设计的承载力要求。最后通过沉降监测数据表明,浅层部分固化加水泥土墙的处理方式满足处理效果及经济两方面的要求。
Aiming at the problem of shallow soft soil existing in Shanghai Xialu Highway, the method of on-site curing of shallow soft soil is adopted to replace the traditional shallow composite foundation treatment. Through the unconfined compressive strength test combined with the bearing capacity of double-layer foundation to determine the amount of curing agent and curing thickness, and then according to the engineering characteristics of the cured thickness is optimized to determine the two different forms of curing methods. Describes the use of domestic simple local shallow curing equipment for shallow soft soil curing method suitable for construction. The field test results show that the ratio of unconfined compressive strength in the test section to unconfined compressive strength in the laboratory meets the design requirements, and the proposed design value when using this process is 0.36. The ultimate bearing capacity of the foundation can be obtained by the shear strength of the cross-slab at the site, which can meet the design requirements of the bearing capacity. Finally, the settlement monitoring data show that the shallow part of the curing plus cement wall treatment to meet both the treatment effect and economic requirements.