岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2014年
12期
2481-2489
,共9页
岩石力学%充填模型%峰值剪切强度%灌浆节理%直剪试验
巖石力學%充填模型%峰值剪切彊度%灌漿節理%直剪試驗
암석역학%충전모형%봉치전절강도%관장절리%직전시험
rock mechanics%peak shear strength model%peak shear strength%cement-grouted joints%direct shear test
通过理论分析和室内直剪试验,对充填水泥浆岩石节理的峰值剪切强度模型进行研究。首先,建立考虑三维形貌特征的充填水泥浆岩石节理峰值剪切强度模型;其次,采用建立的强度模型计算充填水泥浆节理的峰值剪切强度并与直剪试验结果进行对比;最后,对模型计算值和试验值之间的误差进行分析。研究结果表明,建立的充填水泥浆节理峰值剪切强度模型描述了三维形貌、充填度、节理岩壁与水泥结石强度比对充填节理峰值剪切强度的影响;模型计算的充填水泥浆节理峰值剪切强度与试验结果吻合较好,验证了模型的合理性;模型预测的峰值剪切强度与试验值之间存在一定误差,造成误差的主要原因包括模型本身缺陷和试件制备导致的节理黏结缺陷。充填水泥浆岩石节理峰值剪切强度模型的建立具有一定的理论意义,为进一步建立充填水泥浆节理本构理论奠定了基础。
通過理論分析和室內直剪試驗,對充填水泥漿巖石節理的峰值剪切彊度模型進行研究。首先,建立攷慮三維形貌特徵的充填水泥漿巖石節理峰值剪切彊度模型;其次,採用建立的彊度模型計算充填水泥漿節理的峰值剪切彊度併與直剪試驗結果進行對比;最後,對模型計算值和試驗值之間的誤差進行分析。研究結果錶明,建立的充填水泥漿節理峰值剪切彊度模型描述瞭三維形貌、充填度、節理巖壁與水泥結石彊度比對充填節理峰值剪切彊度的影響;模型計算的充填水泥漿節理峰值剪切彊度與試驗結果吻閤較好,驗證瞭模型的閤理性;模型預測的峰值剪切彊度與試驗值之間存在一定誤差,造成誤差的主要原因包括模型本身缺陷和試件製備導緻的節理黏結缺陷。充填水泥漿巖石節理峰值剪切彊度模型的建立具有一定的理論意義,為進一步建立充填水泥漿節理本構理論奠定瞭基礎。
통과이론분석화실내직전시험,대충전수니장암석절리적봉치전절강도모형진행연구。수선,건립고필삼유형모특정적충전수니장암석절리봉치전절강도모형;기차,채용건립적강도모형계산충전수니장절리적봉치전절강도병여직전시험결과진행대비;최후,대모형계산치화시험치지간적오차진행분석。연구결과표명,건립적충전수니장절리봉치전절강도모형묘술료삼유형모、충전도、절리암벽여수니결석강도비대충전절리봉치전절강도적영향;모형계산적충전수니장절리봉치전절강도여시험결과문합교호,험증료모형적합이성;모형예측적봉치전절강도여시험치지간존재일정오차,조성오차적주요원인포괄모형본신결함화시건제비도치적절리점결결함。충전수니장암석절리봉치전절강도모형적건립구유일정적이론의의,위진일보건립충전수니장절리본구이론전정료기출。
A peak shear strength model for cement filled rock joints was proposed based on the results of theoretical analysis and direct shear tests. Firstly,three-dimensional morphology parameters of the cement filled rock joints was obtained. Then,the peak shear strength of the cement filled rock joints was calculated using the proposed model and comparisons were made between the calculated and measured results. Finally,the errors between the predicted and the measured peak shear strengths were analyzed. The predicted results was close to the measured ones. The model was found to capture well the influence of the three-dimensional morphology characteristics,the percentage of cement filling and the strength ratio of joint rock wall to cement stone. Errors were mainly caused by the inaccuracy of the proposed model and the defect of bond between joint and cement stone.