城市湿陷性土的研究

Study on Urban Collapsibility Soil

在非湿陷性黄土地区,随着城市建设的高速发展和扩张,形成大量的填方场地,同时地下水位大幅下降,在城市建设中出现了大量的浅层湿陷性填土和次生湿陷性地基土,该地基土的湿陷性不易被发现,在勘察中往往被勘察人员忽视,针对此问题,采用定性分析和试验的研究方法,验证了浅层湿陷性填土和次生湿陷性地基土的客观存在、演变机理及其危害性,以引起勘察工作者对浅层湿陷性填土和次生湿陷性地基土湿陷性的足够重视,以便更好地做好勘察工作。

In non-slumping loess areas, collapsibility of foundation soil is often overlooked by surveyors. With the rapid development and expansion of urban construction, a large number of filling sites have been formed, and groundwater stage has also dropped significantly. As a result, a mass of shallow collapsible fill and secondary collapsible foundation soil have emerged in urban construction. It adopts qualitative analysis and experimental research methods for practical engineering, verifying the objective existence, evolution mechanism and harm of shallow collapsible fill and secondary collapsible foundation soil. At the same time, the concept of secondary collapsible soil was first proposed. The shallow collapsible fill and secondary collapsible foundation soil should cause surveyors to pay enough attention to do a better job of surveying.