高强钢筋混凝土井壁水平极限承载特性实验

摘要：针对西部地区某煤矿冻结井筒的支护问题，根据相似理论，采用模型实验方法研究了高强混凝土井壁的水平极限承载特性。实验结果表明：井壁结构在水平荷载达到10MPa后，钢筋应力进入屈服应力阶段，表现出明显的塑性流动；井壁破坏荷载达18．4MPa，破坏前混凝土的最大环向应变可达-3400×10^-6。实验结果可为井筒支护参数优选和工程监测提供参数。

Horizontal Ultimate Bearing Capacity Test of High Strength Reinforced Concrete Shaft Lining

Aiming at the retaining problem of the freezing shaft lining of coal mines in the west areas of China, model test was conducted to study the horizontal ultimate bearing and deformation characteristics of high strength reinforced concrete shaft lining, based on the similarity theory. The results show that reinforcement stress goes into yield stress stage and shows obvious plastic flow when the shaft lining is under horizontal load greater than 10 MPa ; The breaking load of shaft lining can reach 18. g MPa, and the shear strain values of concrete can reach -3 400 × 10^-6 when shaft lining is damaged. The test results can make parameter optimization and provide pa-rameters for engineering monitoring of shaft lining.