在渗流河床砂卵砾石地基建造高压旋喷防渗桩墙的实例分析

文章介绍了在上游无截渗条件下,在有较多漂石的河床砂卵砾石层中进行高压旋喷灌浆,针对其存在的造孔难、保孔难、灌浆成桩难三大技术难题,通过技术攻关改造设备、改进施工工艺实现顺利施工,并对钻灌作业予以技术质量把关,为在类似复杂地层进行高压旋喷灌浆建造防渗桩墙提供借鉴。

膜袋充砂围堰+钢板桩防渗心墙围堰的应用

介绍了广西北海市合浦县总江水闸除险加固工程的基本情况。对"膜袋充砂围堰+钢板桩防渗心墙"和"土石围堰+高压旋喷灌浆防渗心墙"全断面围堰施工导流方案进行了综合比较。结合总江水闸挡河闸坝施工导流实践,论述了膜袋充砂围堰+钢板桩防渗心墙全断面围堰施工导流的施工方法。

驼儿潭水库除险加固工程大坝渗流稳定计算

小型水库除险加固工程土石坝多存在大坝渗流稳定问题,常采用设置排水棱体培厚坝坡或设置防渗心墙等工程措施。驼儿潭水库除险加固工程通过设置高压旋喷桩防渗心墙,有效减低坝体浸润线,提高坝体抗渗能力及坝坡渗流稳定性。针对小型水库除险加固工程土石坝渗流稳定的计算方法进行探讨,并介绍了几点经验。

套井回填在岩口水库大坝病害除险中的应用

主要介绍套井冲抓回填法施工工艺在义乌市岩口水库大坝病险治理中的应用情况 ,总结出套井冲抓回填法在大坝 (粘土防渗心墙 )病害治理中有工艺简单、操作方便、高效科学。

Leachate Control Technology Using H-Jointed Steel Pipe Sheet Piles with H-H Joints at Coastal Landfills

H-H joint of ＂H-jointed SPSP with H-H joint＂, which is made up of interlocking two H-steel sections of different sizes, is the one of SPSP＇s joint to improve the hydraulic conductivity. ＂H-H jointed SPSP with H-H joint＂ is expected to be applied to a vertical cutoff wall in coastal landfill sites. In H-jointed SPSP with H-H joint, the H-joint is completely imperviousness. H-H joint, however, is pervious at interlocked state because a gap of 8 to 11 mm is left between the interlocking flanges, therefore, a water interception treatment must be conducted to seal the gap. The water shielding treatment of H-H joint is executed by coating the gaps with a water-swelling sheet of paint before its installation. Then, hollow space is generated in H-H joint after treating by water-swelling sheet, and that space can be used effectively. This paper proposes leachate control technologies using H-H joint interior space of SPSP cutoff walls. The possibility of those technologies and hydraulic conductivity of H-jointed SPSP with H-H joints are demonstrated by conducting the hydraulic conductivity test.