Design and Application of Drainage System for Super Deep Excavation Using Open Cut Method
Water foundation excavation project is a more complex foundation project,in addition to the influence of hydrological conditions and complex geological formations,it also faces the role of waves and tidal currents,especially in the open water using open excavation method for the construction of oversized deep excavation project,the descending excavation may cause the deformation of retaining structure,leakage of the supporting structure,and sliding of the surrounding soil and other engineering problems.Combined with engineering examples,on the basis of fully studying the geological and hydrological conditions of the project,numerical modeling is established to analyze the leakage and overall stability of the support and water-stop system,and the design of open drainage and tube well descending is carried out respectively on the basis of the analytical results,and in the actual construction,faced with the problem of local leakage of super-long single-row stirred pile water-stop curtain,a method of searching for the leakage point is proposed to dynamically stop water leakage through the addition of a light well point for the local leakage point.
deep excavationwater-stop curtainsleakagelight well points
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