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一、概况淮阴复线船闸工程是京杭运河续建工程项目之一。现在该工程已通过验收并放水通航。该船闸闸址地基土层如图1所示,各层土的颗粒级配特征系数见表1,其中④、⑥两层为中粗砂承压含水层,混合水头为▽+10.15m(以废黄河零点为准),总导水系数T=329.05平方米/天,基坑挖至▽-1.0m。淮阴一线船闸施工时曾发生承压水突涌,因此,防止基坑发生承压水突涌,成为确保该工程顺利施工的关键。经研究,我们决定采用管井井群抽水,降低承压水头。
I. Overview Huaiyin double-line ship lock project is one of the Beijing-Hangzhou Canal continued construction projects. Now the project has passed the acceptance and release of navigation. The foundation of the shiplock gate site is shown in Fig. 1, and the characteristic coefficients of particle gradation of each layer of soil are shown in Table 1, where the two layers are medium-coarse sand confined aquifers with a mixing head of ▽ + 10.15m Waste Yellow River zero shall prevail), the total water conductivity T = 329.05 square meters / day, dug excavation ▽ -1.0m. Occurred in the construction of Huaiyin first-line locks sudden pressure water surge, therefore, to prevent pit-induced water surge, as the key to ensuring the smooth construction of the project. After research, we decided to pipe well group pumping, reducing the pressure head.