井点回灌系统截水帷幕的建立及其应用研究

 井点回灌系统截水帷幕是利用回灌井点，在基坑降水的同时对地层补水，由于回灌压力的作用形成截水帷幕，阻挡保护区内地下水的流失，使基坑周围一定范围内的地下水保持动态平衡；井点回灌系统截水帷幕是一种经济适用的截水帷幕施工方法，它对减少由基坑降水引起的周围地面沉降具有积极的工程意义和广泛的应用前景。但目前回灌系统的设计尚不完整、系统。本文提出了采用井点回灌法建立截水帷幕的设计方法及程序，并成功地应用于昆明市银河星辰花园基坑开挖的实践中，并取得了很好的经济效益和社会效益。可为类似工程提供实践参考。

Construction and Application of Curtain for Cutting off Water in Well Point Recharging System

The curtain for cutting off water in well point recharging system is to complement water when it is dropped in foundation pit by using water returning to the well. The curtain for cutting off water is formed by the pressure of returning water, which prevents the loss of underground water in the protecting area and balances the underground water around the foundation pit. The curtain for cutting off water in well point recharging system is an economic and suitable way, which has positive influence on reducing the sink of surrounding resulted from dropping water in foundation and has a wide prospect in its usage. But presently the water returning system is not so perfect and systematical. The essay put forward the designing method and the steps in making use of returning water to build the water curtain interception, which was successfully applied in digging of foundation pig in the residential quarter of Yinghe Xingchen Garden in Kunming and had acquired good economic efficiency and social efficiency. It also can serve as a reference for the similar engineering practice.