工程地质学报
工程地質學報
공정지질학보
2015年
2期
344-351
,共8页
胡熠%谢强%李朝阳%渠孟飞
鬍熠%謝彊%李朝暘%渠孟飛
호습%사강%리조양%거맹비
岩溶路基%注浆%物探%综合检测%评价标准
巖溶路基%註漿%物探%綜閤檢測%評價標準
암용로기%주장%물탐%종합검측%평개표준
Karst roadbed%Grouting%Geophysical%Comprehensive detection%Detection standard
为研究岩溶路基注浆质量综合物探检测方法及相关检测评价标准，在南广铁路全线的岩溶路基中选取具有代表性的试验区段，对电阻率法、瞬态面波法和电磁波CT法等物探检测方法的特性和检测评判标准展开了现场试验研究。根据上述物探检测方法的适用性和经济性，提出了一种在不同工程条件下多种物探检测方法优化组合的综合物探检测方法。并通过统计分析注浆合格的岩溶路基注浆前后电阻率、面波波速及电磁波吸收系数变化规律，初步得出了上述3种检测方法的注浆质量检测评价标准：电阻率法检测合格标准为溶洞注浆前后电阻率变化率大于20％，卵石土层电阻率变化率大于10％；瞬态面波法检测合格标准为注浆后土体波速大于20.6h＋130.3，溶洞波速大于17.1 h＋236.9；电磁波CT法检测合格标准为溶洞注浆前后电磁波吸收系数差值大于0.4dB·m－1，卵石土层电磁波吸收系数差值大于0.1 dB·m－1。
為研究巖溶路基註漿質量綜閤物探檢測方法及相關檢測評價標準，在南廣鐵路全線的巖溶路基中選取具有代錶性的試驗區段，對電阻率法、瞬態麵波法和電磁波CT法等物探檢測方法的特性和檢測評判標準展開瞭現場試驗研究。根據上述物探檢測方法的適用性和經濟性，提齣瞭一種在不同工程條件下多種物探檢測方法優化組閤的綜閤物探檢測方法。併通過統計分析註漿閤格的巖溶路基註漿前後電阻率、麵波波速及電磁波吸收繫數變化規律，初步得齣瞭上述3種檢測方法的註漿質量檢測評價標準：電阻率法檢測閤格標準為溶洞註漿前後電阻率變化率大于20％，卵石土層電阻率變化率大于10％；瞬態麵波法檢測閤格標準為註漿後土體波速大于20.6h＋130.3，溶洞波速大于17.1 h＋236.9；電磁波CT法檢測閤格標準為溶洞註漿前後電磁波吸收繫數差值大于0.4dB·m－1，卵石土層電磁波吸收繫數差值大于0.1 dB·m－1。
위연구암용로기주장질량종합물탐검측방법급상관검측평개표준，재남엄철로전선적암용로기중선취구유대표성적시험구단，대전조솔법、순태면파법화전자파CT법등물탐검측방법적특성화검측평판표준전개료현장시험연구。근거상술물탐검측방법적괄용성화경제성，제출료일충재불동공정조건하다충물탐검측방법우화조합적종합물탐검측방법。병통과통계분석주장합격적암용로기주장전후전조솔、면파파속급전자파흡수계수변화규률，초보득출료상술3충검측방법적주장질량검측평개표준：전조솔법검측합격표준위용동주장전후전조솔변화솔대우20％，란석토층전조솔변화솔대우10％；순태면파법검측합격표준위주장후토체파속대우20.6h＋130.3，용동파속대우17.1 h＋236.9；전자파CT법검측합격표준위용동주장전후전자파흡수계수차치대우0.4dB·m－1，란석토층전자파흡수계수차치대우0.1 dB·m－1。
This paper studies the comprehensive geophysical detection method and evaluation standard of karst roadbed grouting effect.The typical test areas of Nanning-Guangzhou railway karst roadbed are selected.The field test research of detection standard and characteristics are studied using resistivity method,transient surface wave method and electromagnetic wave CT method.The applicability and economy of the above geophysical detection methods are evaluated.The comprehensive geophysical detection method of variety methods combination in different engineering conditions is proposed.The differential values of resistivity,surface wave velocity and electromagnetic wave absorption coefficient are statistically analyzed using the test data of grouting.The grouting is qualified,and preliminarily obtained in the karst roadbed.The grouting effect detection standards are proposed for the above three geophysical methods.The resistivity method detection standard is that the resistivity differential values of karst cave is more than 20%,and the pebble soil is more than 1 0%.The transient surface wave method detection standard is that the wave velocity of clay is more than 20.6h+1 30.3,and the karst cave is more than 1 7.1 h+236.9.The electromagnetic wave CT method detection standard is that the electromagnetic wave absorption coefficient differential values of karst cave is more than 0.4dB·m-1 ,and the pebble soil is more than 0.1 dB·m-1 .
