交河故城崖壁裂隙灌浆效果的电法探测与评价

Electrical surveying and evaluation of the grout filling effect for the cliff fractures in Jiaohe ancient city

采用高密度电法对交河故城崖壁裂隙灌浆前后的电阻率进行了对比探测,通过电性分析,提出了灌浆效果的评价方法。对比分析结果显示,灌浆前裂隙表现为极高阻,灌浆后裂隙电阻率为凝固浆液与周边土体的综合反应,裂隙越小,越接近土体,裂隙越大,越接近凝固浆液。总体结果显示,交河古城崖壁灌浆效果较好,浆液充填饱满,灌浆后不存在裂缝或孔洞。

The comparison surveying of the resistivity before and after the grouting for the cliff fractures in Jiaohe ancient city was carried by using high-density resistivity tomography. Through the analysis on the resistivity the evaluation method for the grouting effect was put forward. The surveying results showed that the resistivity in the fractures was very high before grouting and was the comprehensive effect from the slurry and surrounding soil after grouting, which indicated that the grouting effect was better and the fractures were filled with slurry without cracks or voids.