Analysis of Temperature Effect of Concrete Ring Beam and Lining in Ultra-deep Foundation Pit
In order to analyze the temperature effect in the process of ring beam pouring,this paper takes the foundation pit engineering of a high-rise building as an example to analyze the temperature effect in the process of ring beam pouring and the evolution rule of the mechanical response of underground diaphragm wall during the process of pouring.The results show that with the increase of the pouring time,the circum-ferential strain increases in the reverse direction and then decreases,then increases in the forward direction and then decreases.The stress of the circumferential reinforcement on the side of the pit is stable,then decreases and then increases,then stabilises and then decreases and then increases,and the maximum compressive stress is 32.5 MPa.The stress of the circumferential reinforcement on the earth facing side fluctuates within 11.7 MPa.The concrete placement of annular support beams inside the foundation pit will have a certain impact on the stress response of the existing underground diaphragm wall at different positions.Compressive stress and tensile stress will be generated in the circumferential and vertical direction of the pit facing side of the underground diaphragm wall,and the growth range of tensile stress near the underground dia-phragm wall is significantly smaller than that of the compressive stress at the pit facing side.
Mass concreteTemperature control technologyNumerical simulationStrainStress
国家科技期刊平台
NSTL
万方数据
