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塔贝拉四期扩建工程钢板桩格型围堰最大水深为32m,总填砂量达9.6×104 m3,原设计填砂方案拟采用振冲密实工艺,填砂密实工艺和桩格施工程序相互穿插,影响较大。为优化填砂工艺,优选填砂料源,通过填砂方案比选最终确定采用自重密实填砂工艺,利用填砂试验模拟格体填砂过程并设计了填砂质检方法。试验结果表明,优选的填砂料利用自重填砂即可满足设计要求的桩格填砂体相对密度,自重填砂简化了施工工艺,缩减了工程工期和投资,可为钢板桩围堰填砂提供借鉴。
The maximum water depth of steel sheet pile cofferdam in Phase IV Expansion Project in Taibeila is 32m and the total fill volume is 9.6 × 104m3. The original design of sand filling plan is to use vibro-compaction technology, sand filling densification process and pile construction procedure Interspersed, a greater impact. In order to optimize the sand filling process, the source of sand filling material is preferred, and the self-compaction sand filling process is determined by comparison and selection of sand filling options. The sand filling test is used to simulate the sand filling process and the sand filling quality inspection method is designed. The test results show that the preferred sand filling material can meet the design requirements of the relative density of the pile sand filling body by self-gravity sand filling, and the gravity sand filling simplifies the construction technology and reduces the construction duration and investment, which can be used for sand filling of steel sheet cofferdam Provide reference.