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提出了带钢支撑的水泥土搅拌桩-钢筋混凝土灌注桩连拱基坑支护方案,充分利用水泥土搅拌桩耐压、钢筋混凝土灌注桩可受弯的材料特性,通过拱将两者结合起来,在灌注桩的中部设钢支撑。分析了水泥土搅拌桩、钢筋混凝土灌注桩、钢支撑的受力方式,给出计算方法。理论及工程实践证明带钢支撑的水泥土搅拌桩-钢筋混凝土灌注桩连拱基坑支护体系合理、有效和经济。
A steel-soil-supported cement-soil mixing pile-reinforcement concrete-filled concrete pile with double-arch foundation pit support plan was proposed. The pressure resistance of cement-soil mixing piles and the bendable material characteristics of reinforced concrete cast-in-place piles were used to combine the two. In the middle of the cast-in-place pile, there is a steel support. The force modes of cement-soil mixing piles, reinforced concrete cast-in-place piles and steel supports are analyzed and the calculation methods are given. The theory and engineering practice prove that the supporting system of cement-soil mixing piles with steel supports-reinforced concrete cast-in-place piles with multiple arches is rational, effective and economical.