超深基坑混凝土环梁及内衬浇筑温度效应分析  

Analysis of Temperature Effect of Concrete Ring Beam and Lining in Ultra-deep Foundation Pit

作　　者：苟国朋 Gou Guopeng(Zunyi Free Rrade Cooperative Real Estate Development Co.Ltd.,Zunyi,Guizhou 563000)

机构地区：[1]遵义自贸协同房地产开发有限公司,贵州遵义563000

出　　处：《江西建材》2024年第7期341-343,共3页

摘　　要：文中以某高层建筑基坑工程为例,分析了环梁浇筑过程中的温度效应及浇筑过程中地下连续墙力学响应的演变规律。结果表明,随着浇筑时间的增加,环向应变表现为反向增加后降低,然后正向增加再降低的变化规律;迎坑侧环向钢筋应力表现为先稳定后降低再增加,然后稳定再降低后增加的变化规律,最大压应力为32.5 MPa;迎土侧环向钢筋应力基本在11.7 MPa以内波动;基坑内部环形支撑梁的混凝土浇筑会对已建的地下连续墙不同位置的应力响应造成一定的影响,地下连续墙的迎坑侧环向和竖向会产生压应力和拉应力,近地下连续墙侧的拉应力增长幅度显著小于迎坑侧的压应力增长幅度。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 circumferential 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 diaphragm wall is significantly smaller than that of the compressive stress at the pit facing side.

关 键 词：大体积混凝土 温控技术 数值模拟 应变 应力 

分 类 号：TU74[建筑科学—建筑技术科学]