握裹力对加筋水泥土墙承载性能影响的试验研究

根据对加筋水泥土梁承载特性的试验研究 ,得出加筋水泥土梁随型钢锚固程度不同可能存在两种破坏模式 :在锚固充分的情况下表现为水泥土体的剪切破坏和在锚固不足的情况下表现为型钢与水泥土间的握裹失效破坏 ;型钢与水泥土间的握裹应力随着载荷的增大而增大 ,达到握裹强度后便保持不变 ,且越靠近梁端 ,越迟达到握裹强度。当梁端握裹应力最终达到握裹强度后各点握裹应力全部达到握裹强度 ,荷载的进一步增加将使型钢与水泥土界面发生滑移甚至脱离 ,导致梁体承载能力丧失。握裹强度随着水泥土抗压强度的提高而提高 ,握裹力随型钢与水泥土间握裹面积及锚固长度的增加而增大。

EXPERIMENTAL STUDY ON THE INFLUENCE OF BOND FORCE ON THE MECHANICAL PROPERTIES OF REINFORCED CEMENT-SOIL WALL

According to the experimental study on mechanical properties of reinforced cement|soil beams, reinforced cement soil beams have two possible failure modes:shear failure occurs if anchoring force is enough and bond failure occurs if anchoring force isn't enough; the bond stress at a certain location between shape steel and cement soil accretes with the increase of load, then keep basically invariable when it reaches bond strength. The closer its location is to beams′ end, the later it reaches bond strength. When the bond stress at the end of beams reaches bond strength eventually, the bond stress is uniform along the interface. Further load would create slippage between shape steel and cement soil and causes failure of beams; the bond strength accretes with the increase of compressive strength of cement soil, and the bond force also accretes with the increase of bond length and contact area between shape steel and cement soil.