膨胀土路堑边坡防护机理分析  

Study on Mechanism of Expansive Soil Cut Slope Protection

作　　者：李雄威[1] 周峰[2] 梅国雄[2,3] 张鹤年[4] 

机构地区：[1]常州工学院土木建筑工程学院,江苏常州213002 [2]南京工业大学土木工程学院,江苏南京210009 [3]南昌航空航天大学,江西南昌330063 [4]江苏省交通规划设计院,江苏南京210005

出　　处：《港工技术》2010年第1期45-49,共5页Port Engineering Technology

基　　金：江苏省六大人才高峰基金资助项目(06-F-014)

摘　　要：在室内试验和现场试验结果的基础上,考虑气象因素影响,采用数值模拟的方法,分析浆砌片石和框锚结构防护系统的工作特性。结果表明,浆砌片石护坡可保持边坡湿度场稳定,减缓温差及温度变化对坡体的影响,降低浅层土体风化程度,阻止大气影响深度向土体深处发展;在框锚结构护坡系统中,锚杆在强风化区内设置自由段,不仅不会降低边坡的安全系数还有利于锚杆的稳定,框架梁使边坡滑动土体的下滑推力转由深部土体承担,可有效维持浅层土体的稳定性。锚杆轴向力和框架梁弯矩的分布特征可为工程设计提供参考。On the basis of field test and laboratory test, protection characteristic of grouted rubble and frame-anchor structure is analyzed by means of numerical simulation considering the influence of atmosphere. The results show that grouted rubble may keep the slope moisture steady, lessen the influence caused by the difference in heat and temperature, and prevent the developing of atmosphere influence depth. To frame-anchor structure that setting anchor bolts a free part in the high weathering zone can not only keep the safety coefficient of slope but also be in favor of the stability of anchor. Frame beam can make the deep soil bear the push force of slide mass, and then, make the surface stable. The distribution characteristics of anchor axial force and frame beam bending moment are useful for engineering design.

关 键 词：膨胀土 路堑边坡 浆砌片石 框锚结构 

分 类 号：TU443[建筑科学—岩土工程]