预应力抗浮锚杆锚固段的参数变化对筏板基础内力影响的研究

Internal force of the raft foundation under the influence of the pre-stressed anti-floating anchor's anchorage segment's parametric variation

预应力抗浮锚杆作为一种抗浮技术措施,在国内得到了广泛的应用,但因各地土质的不同,应用效果相差较大,没有统一的衡量标准。本文以合肥地区地质条件为基础,对筏板基础和预应力抗浮锚杆进行了理论分析,并采用有限元软件ABAQUS对筏板基础-预应力抗浮锚杆-土体进行了整体共同工作分析。分析结果表明:筏板基础截面的弯矩随着锚固段长度和刚度的增加而呈非线性减小,但是当增加到一定长度和刚度后,筏板基础截面的弯矩趋近于恒值。说明了单纯地增大锚固段长度和刚度并不能有效减小筏板基础截面弯矩,这为类似的工程提供了参考依据。

The pre-stressed anti-floating anchor regard as a anti-floating technical measure and it has been widely used interiorly However, the soil is different and application effect is large, so there is no measuring standard. This article is on the basis of HeFei^s soil and analyze on raft foundation and pre- stressed anti-floating anchor on theory, then continue modeling by the finite dement software ABAQUS on raft foundation pre-stressed anti-floating anchor soil Through finite element method a- nalysis show that we can learn raft foundation sectional moment will reduce nonlinearly with mounting length of the anchorage segment and stiffness, however, when increase to a certain length and stiff- ness, raft sectional moment will tend to be steady. And illustrate the increasing anchorage segment＇s length and stiffness simply can＇t reduce raft foundation sectional moment, for the similar engineering to provide reasonable basis.