水下降水关键技术的研究与应用

为了降低水体下土层中的水位或水压,拟采用一种非常规的水下降水技术,保证水下工程的安全。水下降水技术是一种全新的技术,和陆上降水相比,其技术环节更复杂、施工难度更大。通过对某工程在水下降水施工过程中的技术难点、可行性分析、设计计算、土层参数确定等环节的探索、研究,并采用止水套管技术、新型隔水材料、水下降水试验模型、套管稳定性分析等一系列创新技术,建立一套可行的水下降水技术方案,确保该工程安全、顺利完成。水下降水技术在该工程的应用为国内外首次,但水下降水施工难度大、费用高,还存在一定的技术风险,还有一些技术环节需要进一步探讨。

Research and Application of Key Technologies of Dewatering under Water

In order to reduce the water level or water pressure in the soil below the water body, an unconventional water descent technology is proposed to ensure the safety of underwater engineering. Underwater dewatering technology is a new technology. Compared with land dewatering, its technical link is more complex and construction is more difficult. Through exploring and researching the technical difficulties, feasibility analysis, design calculation and determination of soil parameters of a project in the process of construction of water descent, A series of innovative technologies are adopted, such as waterproof casing technology, new waterproof material, underwater dewatering test model and casing stability analysis. Successful application of underwater dewatering technology has pioneered both at home and abroad. However, the construction of underwater dewatering is difficult and expensive. There are still some technical risks, and some technical links need to be further explored.