基于自平衡试桩法大直径嵌岩桩尺寸效应分析

›› 2012, Vol. 33 ›› Issue (8): 2403-2407.

基于自平衡试桩法大直径嵌岩桩尺寸效应分析

龚成中^{1, 2}，何春林¹，龚维明²，戴国亮²

1. 淮阴工学院，江苏淮安 223001；2. 东南大学土木工程学院，南京 210096

收稿日期:2011-03-09 出版日期:2012-08-10 发布日期:2012-08-13
作者简介:龚成中，男，1970年生，博士，副教授，主要从事岩土工程方面的教学与科研工作
基金资助:
江苏省自然科学基金项目(No. BK2011406)；山东省交通厅科技项目(No. 2010Y-3)

Analysis of size effect on large diameter rock-socketed pile based on self-balance method

GONG Cheng-zhong^{1, 2}，HE Chun-lin¹，GONG Wei-ming²，DAI Guo-liang²

1. Huaiyin Institute of Technology, Huaian, Jiangsu 223001, China; 2. School of Civil Engineering, Southeast University, Nanjing 210096, China

Received:2011-03-09 Online:2012-08-10 Published:2012-08-13

摘要/Abstract

摘要： 基于自平衡测试技术，通过现场的原位测试方法，对大直径嵌岩桩的尺寸效应进行了研究，内容包括桩径尺寸和嵌岩深度变化以及桩端阻力尺寸效应的影响分析等。从测试结果来看，嵌岩桩也存在一定程度的尺寸效应现象。当其他条件一定时，随着桩径的增大，桩侧阻力存在着减小现象；在同一种岩层的情况下，随着嵌岩深度的增大，桩侧阻力发挥也并不相同，嵌岩深度越大，桩侧阻力发挥也越小。实测结果表明，桩周岩石的特性变化对桩侧阻力影响最大，岩石抗压强度越高，桩侧阻力也越大。此外，桩径的变化对桩端阻力的影响更为明显。因此，在大直径嵌岩桩的设计中应注意尺寸效应对桩基承载力的影响。

关键词: 嵌岩桩, 尺寸效应, 桩侧阻力, 桩端阻力

Abstract: Based on the self-balanced test technology, the size effect on the large diameter rock-socketed pile has been analyzed by using in-situ testing methods, including the change of diameter, the depth socketed in rock and size effect on tip resistance of pile and so on. From the result of test, it can be seen that it exit a certain phenomenon of the size effect on the large diameter rock-socketed pile. With the increasing of pile diameter, the side resistance is decreased while other conditions are invariable. From the socketed depth point of view, the side resistance of pile is not the same in the case of the same rock areas because of the difference of its socketed depth. The greater the depth embedded in rock, the smaller the side resistance of pile. The experimental results show that the character of the rock around the pile has the greatest impact on the pile side resistance. The higher the compressive strength of rock, the side resistance of pile is also greater. In addition, the effect of diameter change on the pile tip resistance is even more apparent. Therefore, the design of large diameter pile should pay attention to the size effect on the bearing capacity in rock areas.

Key words: rock-socketed pile, size effect, shaft resistance, tip resistance

中图分类号:

TU 47

龚成中，何春林，龚维明，戴国亮 . 基于自平衡试桩法大直径嵌岩桩尺寸效应分析[J]. , 2012, 33(8): 2403-2407.

GONG Cheng-zhong ，HE Chun-lin ，GONG Wei-ming ，DAI Guo-liang . Analysis of size effect on large diameter rock-socketed pile based on self-balance method[J]. , 2012, 33(8): 2403-2407.

参考文献

相关文章 15

[1]	周梦佳, 温彦锋, 邓刚, 王蕴嘉, 宋二祥, . 堆石料单颗粒劈裂试验破碎强度随机性与尺寸效应的三维离散元模拟[J]. 岩土力学, 2019, 40(S1): 503-510.
[2]	吴爽爽, 胡新丽, 章涵, 周昌, 龚辉, . 嵌岩桩负摩阻力现场试验与计算方法研究[J]. 岩土力学, 2019, 40(9): 3610-3617.
[3]	袁维, 刘尚各, 聂庆科, 王伟, . 基于冲切破坏模式的嵌岩桩桩端溶洞顶板临界厚度确定方法研究[J]. 岩土力学, 2019, 40(7): 2789-2798.
[4]	杨苏春, 张明义, 王永洪, 桑松魁, 苗德滋. 基于现场试验的闭口静压管桩贯入层状地基桩端阻力研究[J]. 岩土力学, 2018, 39(S2): 91-99.
[5]	高桂云，王成虎，王春权，. 双圆环直接拉伸试验试样最优尺寸范围研究[J]. , 2018, 39(S1): 191-202.
[6]	李杨，佘成学. 堆石料单粒强度尺寸效应的颗粒流模拟方法研究[J]. , 2018, 39(8): 2951-2959.
[7]	刘海峰，朱长歧，孟庆山，王星，李小刚，吴文娟, . 礁灰岩嵌岩桩的模型试验[J]. , 2018, 39(5): 1581-1588.
[8]	宿辉, 杨家琦, 胡宝文, 高轩, 马辉, . 颗粒离散元岩石模型的颗粒尺寸效应研究[J]. 岩土力学, 2018, 39(12): 4642-4651.
[9]	薛晨，符文熹，何思明，. 组装式变尺寸直剪仪的研制[J]. , 2018, 39(10): 3907-3914.
[10]	周海娟，马刚，袁葳，周伟，常晓林, . 堆石颗粒压缩破碎强度的尺寸效应[J]. , 2017, 38(8): 2425-2433.
[11]	张玉成，杨光华，胡海英，刘翔宇，骆以道，姜燕, . 载荷试验尺寸效应及地基承载力确定方法探讨[J]. , 2016, 37(S2): 263-272.
[12]	王洪新. 基坑的尺寸效应及考虑开挖宽度的抗隆起稳定安全系数计算方法[J]. , 2016, 37(S2): 433-441.
[13]	王青元，朱万成，刘洪磊，牛雷雷，李如飞 , . 单轴压缩下绿砂岩长期强度的尺寸效应研究[J]. , 2016, 37(4): 981-990.
[14]	梁昌玉，李晓，吴树仁，. 中低应变率加载条件下花岗岩尺寸效应的能量特征研究[J]. , 2016, 37(12): 3472-3480.
[15]	王卫东，吴江斌，王向军. 嵌岩桩嵌岩段侧阻和端阻综合系数研究[J]. , 2015, 36(S2): 289-295.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed