横泉水库旧坝体及黄土台地强夯处理实践

On Practices of Strong Pounding Handling on Old Dam Body and Loess Bench of Hengquan Reservoir

山西省横泉水库在原有遗留工程基础上进行重新建设,以往的4次施工,填筑了长400m、高17m左右的左岸坝体,填土约120万m3,但坝体填筑质量极差,干容重和渗透系数根本无法满足设计要求。此次重新建设,决定对这部分干容重不达设计要求且具有湿陷性的左岸旧坝体以及左岸黄土台地进行强夯处理,对坝体进行强夯处理在省内还是首次进行,在国内也比较少见,通过处理,坝体质量达到了设计要求,并且节约了投资,效果明显。

On the basis of past remained works, the Hengquan Reservoir is reconstructed. In the past four times of construction, the left dam was embanked 400 m long and 17 m high, the total soil volume of embankment was 12×10^5 m^3, but the quality of dam body is very bad. The dry density and the coefficient of permeability can＇t meet the design demand. In this process of present reconstruction, it is determined to use strong pounding method to handling the old left dam body, the dry density of which can＇t meet the design demand and collapsibility of which exists. It is the first time to use this method on the dam body in our province and is rare in our country. Through handling, the quality of the dam body meets the design demand, the cost of project is saved and the effect is obvious.