Trapezoidal staggered type foundation pit supporting mechanism and foundation pit supporting method

The invention relates to a trapezoidal staggered type foundation pit supporting mechanism and a foundation pit supporting method. A soil body is surrounded between a front-row supporting wall and a lateral supporting wall by forming a trapezoidal structure, under the action of each crown beam, the soil body can form a stress whole with the front-row supporting wall and the lateral supporting wall together, and therefore, the trapezoid staggered type foundation pit supporting mechanism is composed of a plurality of stress wholes, and the lateral bending resistance of the trapezoid staggered type foundation pit supporting mechanism is improved on the whole. And in the process, cast-in-place piles in the trapezoidal staggered type foundation pit supporting mechanism are still arranged in a single row, so that the manufacturing cost is effectively controlled. 本发明涉及一种梯形交错式基坑支护机构和基坑支护方，通过形成梯形的结构将土体围在前排支撑墙与侧向支撑墙之间，在各个冠梁的作用下，使得土体能够与前述的前排支撑墙和所述侧向支撑墙一起形成一个受力整体，从而所述梯形交错式基坑支护机构由多个此受力整体组成，整体上提升其侧向抗弯能力。而且在此过程中是所述梯形交错式基坑支护机