湿陷性黄土在强夯作用下的非完全弹性碰撞与冲击应力解析  

Non-perfect elastic collision and impact stress analysis during dynamic compaction on collapsible loess

作　　者：水伟厚[1] 高广运[1] 吴延炜 王亚凌 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]中化岩土工程有限公司,北京102600

出　　处：《建筑结构学报》2003年第5期92-97,共6页Journal of Building Structures

基　　金：上海市重点学科资助。

摘　　要：在考虑夯锤自重的基础上,结合动力基础半空间理论,并基于夯锤与土体的非完全弹性碰撞,导出了强夯夯锤位移、速度、加速度和锤底冲击应力时程关系等一系列解析式。同时利用工程实测数据,对湿陷性黄土地基上夯锤与土体的共同作用进行了研究。研究表明,恢复系数影响夯锤的冲击速度,冲击速度显著影响强夯的冲击应力。Based on considering the tamper weig ht itself and the non-perfect elastic collision of the tamper and ground i n dynamic compaction(DC),series solutions of the displaceme nt,velocity,acceleration and impact stress were derived by use of the half space theory.Moreove r,the interaction of the tamper and g round was studied by comparing the calculated values with experimental data obtained on the collapsible loess site.It is shown that the coefficient of restitution affects the inpact velocity of tamper and imp act velocity affects the impact stre ss apparently.

关 键 词：湿陷性黄土 强夯 非完全弹性碰撞 冲击应力 动力基础 半空间理论 

分 类 号：TU444[建筑科学—岩土工程] TU431[建筑科学—土工工程]