基岩与混凝土胶结面的剪切试验和数值分析

沈吴钦; 吴昌将; 曹小建; 韦盛阳

doi:10.13204/j.gyjzG22052107

基岩与混凝土胶结面的剪切试验和数值分析

doi: 10.13204/j.gyjzG22052107

1. 南通大学交通与土木工程学院, 江苏南通 226019;
2. 同济大学岩土及地下工程教育部重点实验室, 上海 200092

基金项目:

江苏省自然科学基金青年项目（BK20180954）。

详细信息

作者简介:
沈吴钦,男,1999年出生,硕士研究生。

通讯作者:
吴昌将,博士,高级工程师,15921360161@163.com。

计量
- 文章访问数: 126
- HTML全文浏览量: 15
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2022-05-21
- 网络出版日期: 2023-10-17

Field Shear Tests and Numerical Analysis on Cemented Surfaces Between Concrete and Bedrocks

1. School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 以赣江公路大桥重力式锚碇基础工程为依托，在弱微风化泥质粉砂岩的地质条件下，针对混凝土与基岩之间胶结面不同粗糙度的实际情况，开展现场大型剪切试验研究，分析锚碇基础混凝土与基岩之间胶结面的剪切作用机理、破坏模式、变形特性以及抗剪强度参数。同时，为能有效评估胶结面粗糙度对抗剪强度的影响，引入随机分布特征参数，对胶结面的粗糙度进行定量指标化，并采用蒙特卡洛模拟方法模拟胶结面的起伏形态。最后，借助剪切试验数值模拟分析的手段，对不同粗糙形态胶结面的抗剪强度进行研究，进而提出一种基于随机接触面数值计算的胶结面抗剪强度评估的新方法。此外，为验证该抗剪强度计算方法的准确性，将现场直剪试验结果与其进行对比，取得了较一致的结果。
- 胶结面 /
- 现场剪切试验 /
- 破坏模式 /
- 抗剪强度 /
- 随机接触面
Abstract: Based on gravity anchorage foundations of Ganjiang Highway Bridge situated on weakly weathered argillaceous siltstone, large-scale shear tests on the site were conducted to study shear mechanisms, failure modes, deformation characteristics and shear strength parameters of cemented interfaces, aimed at cemented interfaces with different roughnesses between anchorage foundation concrete and bedrock. Simultaneously, to effectively estimate the effect of cemented surface roughness on shear strength, characteristic parameters of random distribution were firstly introduced to quantify the cemented interface roughness, and the Monte-Carlo method was simulated the undulating pattern of cemented interfaces. Then, numerical simulation analysis on shear tests was implemented to study shear strength with different cemented interface roughnesses. Eventually, a new evaluation method for cemented interface shear strength was proposed based on numerical simulations with random contact interfaces. In addition, the results from numerical simulations were compared with the data by direct shear tests on the site, and the comparison results indicated they were highly consistent.
- cemented interface /
- field shear test /
- failure mode /
- shear strength /
- random contact interface

HTML全文

参考文献(17)

[1]	赖允瑾, 吴昌将, 张子新. 软岩地基悬索桥重力式锚碇齿坎效应的试验研究与数值分析[J]. 岩石力学与工程学报, 2010, 29(3):593-602.
[2]	吉林, 眭峰, 王保田. 润扬大桥锚碇基岩摩阻力试验研究[J]. 岩石力学与工程学报, 2003, 23(2):256-260.
[3]	杨令强, 李园园, 林明强. 门楼水库溢流坝段岩石与混凝土抗剪参数的确定[J]. 岩土力学, 2008, 29(增刊1):515-518.
[4]	王保田, 朱珍德, 张福海, 等. 花岗岩与混凝土胶结面抗剪强度的试验研究[J]. 岩土力学, 2004, 25(11):1717-1721.
[5]	SAIANG D, MALMGREN L, NORDLUND E. Laboratory tests on shotcrete-rock joints in direct shear, tension and compression[J]. Rock Mechanics and Rock Engineering, 2005, 38(4):275-297.
[6]	TIAN H M, CHEN W Z, YANG D S, et al. Experimental and numerical analysis of the shear behavior of cemented concrete-rock joints[J]. Rock Mechanics and Rock Engineering, 2015, 48(1):213-222.
[7]	郭中华, 王炜, 陆建, 等. 砂浆-灰岩双相材料剪切强度及压剪断裂判据探析[J]. 岩石力学与工程学报, 2003, 22(3):429-433.
[8]	唐兴华,王明年,童建军,等.高温变温条件下喷射混凝土-花岗岩胶结面剪切强度[J].铁道学报,2017,39(12):131-136.
[9]	BARTON N R, CHOUBEY V. The shear strength of rock joint in theory and practice[J]. Rock Mechanics and Rock Engineering, 1977, 10(1):1-54.
[10]	LEE S D, LEE C I. Characterization of joint profiles and their roughness parameters[J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1997(34):3-4.
[11]	谢和平, PARISEAU W G. 岩石节理粗糙系数(JRC)的分形估计[J]. 中国科学(B辑), 1994, 24(5):524-530.
[12]	宋磊博, 江权, 李元辉, 等. 基于剪切行为结构面形貌特征的描述[J]. 岩土力学, 2017, 38(2):525-533.
[13]	陈世江, 朱万成, 于庆磊, 等. 基于多重分形特征的岩体结构面剪切强度研究[J]. 岩土力学, 2015, 36(3):703-710.
[14]	沈明荣, 张清照. 规则齿型结构面剪切特性的模型试验研究[J]. 岩石力学与工程学报, 2010, 29(4):713-719.
[15]	李晓锋, 李海波, 夏祥, 等. 类节理岩石直剪试验力学特性的数值模拟研究[J]. 岩土力学, 2016, 37(2):583-591.
[16]	张雅慧, 汪丁建, 唐辉明, 等. 基于PFC2D数值试验的异性结构面剪切强度特性研究[J]. 岩土力学, 2016, 37(4):1031-1041.
[17]	杜时贵, 王小翠. 智能JRC测量仪的研制[J]. 岩土力学, 2006, 27(增刊):1202-1204.