Three pipe double high pressure rotary jet sprouting reinforced construction method and its equipment
A technology of grouting reinforcement and construction method, which is applied in basic structure engineering, construction, sheet pile wall and other directions, can solve problems such as insufficient soil crushing energy, and achieve the effect of enhancing crushing effect and increasing injection energy.
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[0019] The present invention will be further described below in conjunction with specific embodiments and drawings.
[0020] The maximum excavation depth of an ultra-deep foundation pit project reaches 41m. The maintenance system of the foundation pit is an underground continuous wall and reinforced concrete support. The thickness of the underground continuous wall is 1.2m and the depth reaches 65.5m. Taking into account the high requirements of the underground continuous wall joints for water stopping, high-pressure jet grouting piles were constructed outside the underground continuous wall joints for water stopping reinforcement. According to the design requirements, the maximum reinforcement depth is up to 50m, the diameter of the reinforced pile is greater than 1.8m, and the uniaxial unconfined compressive strength is not less than 1.2MPa. The joints are arranged in two rows, according to the quality of the underground continuous wall construction. There are three cases of thr...
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