城市基坑工程注浆技术及其应用

研究目的：地下水是影响城市基坑工程安全、顺利施工的重要因素，注浆技术是治理地下水的一种有效手段，因此，注浆技术已成为基坑工程施工中必不可少的辅助工法。通过工程实例，研究城市基坑工程注浆技术。研究方法：结合工程实例，研究城市基坑工程注浆技术参数、工艺，以及注浆效果评定标准。研究结果：在基坑工程施工中，通过在围护结构外施作注浆止水帷幕，以保证桩基的安全施工；通过对围护结构外进行桩问注浆，从而保证基坑的安全开挖；在基坑开挖到含水构造时，通过施作基底注浆止水帷幕，以防止基底涌水和上鼓；基坑完成后，通常会存在或多或少的桩问渗漏水，通过对桩间进行渗漏水治理，从而提高基坑防水等级，降低运营抽水费用。研究结论：对基坑工程的注浆技术进行了较为系统的总结与研究，提出基坑工程注浆效果检查项目和标准。

Application of Grouting Technology in City Excavation Engineering

Research purposes: Ground water is an important influence factor to excavation engineering and grouting technology is an effective method to father ground water.Therefore,grouting technology is an imperative assistant method to excavation engineering.By the example of the engineering,this paper researches grouting technology of city excavation engineering.Research methods:By the engineering example,this paper researches parameter,technique and effect standard of grouting technology.Research results:In the excavation engineering construction,we can assure safety in construction of pile.By grouting midst pile out enclosing,we can assure safety in construction of excavation construction.When the excavation work to water structure,we can prevent water burst and bulge out of the fundus through making the grouting water stop purdah on the fundus.After the excavation is finished,there usually exists more or less leakage water middle the pile and we increase water stop standard and reduce the pump water charge through fathering the leakage water of the pile middle.Research conclusions:This paper systemically summarizes and studies grouting technology of excavation engineering through engineering example,and puts forward the inspection items and standards of grouting effect.