测斜仪测量路基水平位移过程中的局限性分析  

Analysis on Limitation of Inclinometer in Measuring Lateral Displacement of Soft Soil Foundation Under Embankment

作　　者：刘金龙[1] 栾茂田[2] 王吉利[3] 

机构地区：[1]合肥学院建筑工程系,合肥230022 [2]大连理工大学土木水利学院岩土工程研究所,大连116024 [3]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《长江科学院院报》2007年第5期56-59,共4页Journal of Changjiang River Scientific Research Institute

基　　金：中国科学院武汉岩土力学研究所领域前沿基础研究基金(Q110305);合肥学院引进人才启动基金(RC027)

摘　　要：基于多个工程的实测数据,对利用测斜仪和边桩对路基侧向位移过程中的局限性进行了考察。对比分析表明:铝合金测斜管导向槽的扭转较小,而塑料测斜管的扭转问题较为严重;测斜管达到极限变形后,极限弯曲部位以下地方的侧向位移无法进一步测量;测斜管两端被相对固定,且测斜管管材的刚度远远大于饱和软土,导致软土与测斜管不能协调变形。因而,基于测斜管得到的侧向位移数值是近似的。为此,需要改进现有的测斜仪和边桩测试技术,突破依靠导轮式测头在测斜管导向槽内的滑动来考察侧向位移大小的设计理念,减少侧向位移测试技术中的诸多非确定因素。On the basis of the measured values of lateral displacements of some engineering, the limitation of lateral displacement measured by inclinometers and side pilings is analyzed. The results show that the twisting angle of an aluminous alloy pipe is rather little, while the twisting problem of a plastic pipe is serious, that, when the deformation of an inclinometer pipe reaches an extreme state, the lateral displacement under the extreme deformation location can not be gotten conveniently any more, and that, moreover, the inclinometer cannot get the compatibility of deformation with soil, for it is fixed with both ends by hard soil and has a greater stiffness than soil. So, the value of lateral displacement obtained ftom the inclinometer is inaccurate. Therefore, the technique of measuring lateral displacement should be improved, the design methodology of gauge head with wheel guiding in the inclinometer pipe modified, and the number of uncertain factors influencing the testing results abated.

关 键 词：软土路基 侧向位移 测斜仪 边桩 局限性 

分 类 号：U412.22[交通运输工程—道路与铁道工程]