摘要
对于场地浅部存在渗透性强、给水度大、坑内外水头差大的卵(碎)石或漂(块)石等复杂地层,制订基坑截水帷幕设计方案及施工方案时不应简单照搬其他类似工程,而应根据场地环境条件、工程地质条件及水文地质条件先进行方案性试验、生产性试验,对比、分析后择优确定凝固剂、掺入量、水灰比、机械设备、施工工艺等,尤其应慎用喷射桩连成帷幕法。只有这样,才能做到综合分析、因地制宜,使所制订的方案更科学、更合理,更好地保证工程质量、成功截水。否则就可能造成帷幕严重渗漏,继而不得不返工或采取应急补救措施。
Due of the strong permeability, the large strength of water rupply and the wide differfnce of water head, the gravelly soil and the boulder soil are strong complicated stratums. In this kind of construction site,it is wrong to simply imitate the similar engineering project to design waterproof curtain of the foundation trench and to plan construction scheme. The investigation test and the production test should be conducted according to the environmental condition, engineering geological condition and hydrogeological condition. Having contrasted and analyzed the test results, the coagulant, volume mixing,water cement ratio, mechanical equipment and construction technology can be determined.accurately. It should be cautious to determine the final solution that jet grout pile waterproof curtain. Based on the comprehensive analysis and adjusting measures to local conditions, the scheme is more scientific and more reasonable. The waterproof curtain is good and it can intercept the grounderwater successfully. Otherwise, the curtain maybe is aleak badly. Then, it has to rework or to take remedial action.
出处
《建筑技术开发》
2022年第13期35-39,共5页
Building Technology Development
关键词
复杂地层
深基坑
截水帷幕
方案设计
complicated stratum
deep foundation trench
waterproof curtain
scheme determine
作者简介
刘学峰(1970-),男,山东高密人,高级工程师,主要研究方向为岩土工程勘察、设计及施工。
