直螺纹灌浆套筒钢筋连接技术的试验与应用

针对码头工程中钢筋连接采用焊接、机械连接功效慢的问题，本文研究灌浆直螺纹套筒钢筋连接技术，通过室内拉伸试验，对比不同套筒长度的钢筋锚固系统破坏强度。结果表明：套筒长度与钢筋直径之比大于等于8且锚固系统破坏时，钢筋应力可达360 MPa以上；套筒可根据钢筋的设计拉力和灌浆材料的剪切强度确定。通过工程检验，采用直螺纹套筒灌浆技术可满足码头工程使用要求，提高钢筋连接效率，降低施工期环境污染，该技术可为绿色建造提供思路。

Test and application of straight thread grouting sleeve reinforcement connection technology

Regarding the problem of slow efficiency of welding and mechanical connection for steel bar connection in wharf engineering, this paper studies the connection technology of grouting straight thread sleeve steel bar, and compares the failure strength of the anchorage system with different sleeve length by indoor tensile fest.The results show that the ratio of sleeve length to the diameter of the reinforcement is 8 or more, and the stress of the reinforcement can reach over 360 MPa when the anchorage system fails.The sleeve design can be determined according to the design tension of reinforcement and the shear strength of grouting material.Through the engineering inspection, the straight thread sleeve grouting technology can meet the engineering requirements, provide high steel bar connection efficiency, and reduce environmental pollution during construction.This technology can provide ideas for green construction.