Construction organization design of super deep diaphragm wall with top-down construction method for deep foundation pit
The surrounding ground wall of the foundation pit of this project is divided into six categories: A, B, C, D, E, F, a total of 11 groove sections, 59 pieces in total. The thickness of the ground wall is 1.0m, 1.2m, and the groove depth is 40~47.1m. Steel box joints are used. The concrete strength grade is C35 (underwater), and the impermeability grade is P10; There are 15 core tube ground walls in total, with H-shaped steel joints, thickness of 1.2m and 1.3m, bottom elevation of -47.15m, concrete strength of C60, and rock penetration of 2-7m; See the table below for details. Ground wall type, wall top elevation, wall bottom elevation, thickness, remarks, foundation pit peripheral ground wall A type -2.65m -42.65m 1.2m, 10 pieces of bottom 3m plain concrete foundation pit peripheral ground wall B type -2.65m -47.55m 1.0m, 16 pieces of bottom 5.7m plain concrete foundation pit peripheral ground wall C type -2.65m -45.75m 1.0m, 8 pieces of bottom 3.5m plain concrete foundation pit peripheral ground wall D type -2.65m -49.75m 1.0m, 7 pieces of bottom 4.5m plain concrete foundation pit peripheral ground wall E type -2.65m -49.75m 1.0m 9 pieces of bottom 5m plain concrete foundation pit peripheral ground wall F-shaped -2.65m-49.75m 1.2m 9 pieces of bottom 5m plain concrete core tube ground wall -47.15m 1.2m 1.3m 15 pieces of H-shaped steel joints