循环荷载下土体变形的深层平板静力载荷测试
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摘要
循环荷载作用下土体变形的深层平板静力载荷研究,是目前建筑地基构建中极其重要的步骤,对建筑物的安全和土地测绘具有重要意义。当前土体变形的平板载荷测试方式,对变形模量的测定准确性较差,经验系数修正不准确,导致深层平板静力载荷测试精度较低。本文根据土体变形的深层平板静力载荷测试装置和测试步骤,利用测试截面的选取、对承压板沉降的测读、反复加荷,直到达到预设的停止标准等步骤,完成土体变形的深层平板静力载荷初步测试。实验表明,测试得到的土体变形的深层平板静力载荷变形模量,精确度高。利用有限元解和Boussinesq解之间的比值,及Mindlin解和Boussinesq解之间的比值等参数,进一步验证了所提方法获得结果与实际值贴合程度较高,表明所提方法具有可靠性。
The research on the static load of deep plate of soil deformation under cyclic load is an extremely important step in building foundation construction at present, which is of great significance to the safety of buildings and land mapping. The accuracy of the measurement of deformation modulus is poor, and the correction of empirical coefficient is not accurate. According to the static load testing device and test procedure of deep plate, the selection of test section is used to measure the static load of deep plate. The experimental results show that the deformation modulus of the deep plate of soil deformation obtained by the test is of high accuracy. The ratio of the finite element solution to the Boussinesq solution, and the ratio between the Mindlin solution and the Boussinesq solution are used, and the parameters such as the ratio of the finite element solution to the Boussinesq solution and the ratio of the Mindlin solution to the Boussinesq solution are used. It is further verified that the proposed method has a high degree of matching with the actual value, which indicates that the proposed method has good agreement with the actual value. The method is reliable.
The research on the static load of deep plate of soil deformation under cyclic load is an extremely important step in building foundation construction at present, which is of great significance to the safety of buildings and land mapping. The accuracy of the measurement of deformation modulus is poor, and the correction of empirical coefficient is not accurate. According to the static load testing device and test procedure of deep plate, the selection of test section is used to measure the static load of deep plate. The experimental results show that the deformation modulus of the deep plate of soil deformation obtained by the test is of high accuracy. The ratio of the finite element solution to the Boussinesq solution, and the ratio between the Mindlin solution and the Boussinesq solution are used, and the parameters such as the ratio of the finite element solution to the Boussinesq solution and the ratio of the Mindlin solution to the Boussinesq solution are used. It is further verified that the proposed method has a high degree of matching with the actual value, which indicates that the proposed method has good agreement with the actual value. The method is reliable.
引文
[1] 浦少云, 饶军应, 杨凯强,等. 循环荷载下土体变形特性研究[J]. 岩土力学, 2017, 38(11):3261-3270.
[2] 黄娟, 丁祖德, 袁铁映,等. 循环荷载作用下泥炭质土的动变形特性试验研究[J]. 岩土力学, 2017, 38(9):2551-2558.
[3] 吴晓刚. 地铁吊脚桩深基坑围护结构及土体变形规律[J]. 科学技术与工程, 2016, 16(14):280-287.
[4] 陈东, 周传波, 李超人,等. 左右线盾构超越施工影响下的土体变形规律研究[J]. 城市轨道交通研究, 2017, 20(1):44-47.
[5] 王志丰, 沈水龙, 谢永利. 水平旋喷桩施工引起周围土体变形分析[J]. 岩土力学, 2016, 37(4):1083-1088.
[6] 赵占军. 明挖基坑中拔除钢板桩引起的土体变形研究[J]. 施工技术, 2016, 45(7):55-58.
[7] 唐益群, 尹叶鹏. 循环荷载作用下软土中单桩承载及变形特性数值试验研究[J]. 上海国土资源, 2017, 38(1):83-86.
[8] 熊勇, 罗强, 张良,等. 基于小型平板载荷试验的粉质黏土变形演化状态特征分析[J]. 岩土力学, 2015, 36(9):2560-2568.
[9] 于长龙, 李军. 星载通信-雷达-电子侦察射频部分一体化概论[J]. 电子设计工程, 2017, 25(5):92-96.
[2] 黄娟, 丁祖德, 袁铁映,等. 循环荷载作用下泥炭质土的动变形特性试验研究[J]. 岩土力学, 2017, 38(9):2551-2558.
[3] 吴晓刚. 地铁吊脚桩深基坑围护结构及土体变形规律[J]. 科学技术与工程, 2016, 16(14):280-287.
[4] 陈东, 周传波, 李超人,等. 左右线盾构超越施工影响下的土体变形规律研究[J]. 城市轨道交通研究, 2017, 20(1):44-47.
[5] 王志丰, 沈水龙, 谢永利. 水平旋喷桩施工引起周围土体变形分析[J]. 岩土力学, 2016, 37(4):1083-1088.
[6] 赵占军. 明挖基坑中拔除钢板桩引起的土体变形研究[J]. 施工技术, 2016, 45(7):55-58.
[7] 唐益群, 尹叶鹏. 循环荷载作用下软土中单桩承载及变形特性数值试验研究[J]. 上海国土资源, 2017, 38(1):83-86.
[8] 熊勇, 罗强, 张良,等. 基于小型平板载荷试验的粉质黏土变形演化状态特征分析[J]. 岩土力学, 2015, 36(9):2560-2568.
[9] 于长龙, 李军. 星载通信-雷达-电子侦察射频部分一体化概论[J]. 电子设计工程, 2017, 25(5):92-96.