CAJ | 학술논문

从变形和测压管水位2个方面对硗碛大坝坝基廊道纵0＋168.12结构缝渗漏原因进行了分析,结果表明结构缝变形过大是造成渗漏的根本原因。对结构缝进行水溶性聚氨酯灌浆处理后,渗漏现象消失,结构缝左侧、防渗体下游的测压管水位仍与库水位相关,但呈逐年下降的趋势;采用BP神经网络模型对坝后渗流量进行分析和预报,结果表明坝后渗流量基本稳定,从而得出水溶性聚氨酯灌浆处理对于改善该结构缝的防渗性能具有明显效果,但结构缝左侧灌浆平洞上部防渗体系可能仍存在局部缺陷的结论。同时,对＂防渗墙＋廊道＋心墙＂联合防渗体系今后的观测、检测和计算分析亦提出了相应建议。
종변형화측압관수위2개방면대교적대패패기랑도종0＋168.12결구봉삼루원인진행료분석,결과표명결구봉변형과대시조성삼루적근본원인。대결구봉진행수용성취안지관장처리후,삼루현상소실,결구봉좌측、방삼체하유적측압관수위잉여고수위상관,단정축년하강적추세;채용BP신경망락모형대패후삼류량진행분석화예보,결과표명패후삼류량기본은정,종이득출수용성취안지관장처리대우개선해결구봉적방삼성능구유명현효과,단결구봉좌측관장평동상부방삼체계가능잉존재국부결함적결론。동시,대＂방삼장＋랑도＋심장＂연합방삼체계금후적관측、검측화계산분석역제출료상응건의。
The seepage causes for structural joints of 0 ＋168.12 foundation corridor of Qiaoqi Dam are analyzed from the two aspects of deformation and piezometric water level.The results show that large deformation of the structural joints is the basic cause of seepage.Leakage phenomenon of the structural joints is disappeared after they are treated by use of aqurous polyurethane grouting.The piezometric water levels at their left side and in the downstream of the impervious system still relate with the reservoir water level,but it has a declining trend year by year.The analysis of BP neural network model shows that the seepage behind the dam is stable.It is seen that the grouting by using aqurous polyurethane has a significant effect to improve this impervious performance of the structural joints.However,the local part of the impervious system above the grouting corridor at the left side of the structural joints probably still has defect.At the same time,several advices of the joint impervious system of ＂impervious wall＋corridor＋core wall＂ are proposed for the future observation,tests and computation.