南水北调中线工程南阳三标滑坡成因与处理方法

南水北调中线工程南阳三标膨胀土渠段，在经历数次降雨后，渠段局部土体在多次干湿循环后强度降低、地表水进入裂隙、改性土未及时回填到位，造成渠坡两次滑坡和抗滑桩倾覆破坏。经及时处理，快速施工，确保了中线主体按时完工。

Discussion on the Reason of Slope Sliding and Treatment in the Third Bided-Section of NanYang

The slope and piles of the third bided-section in Nanyang were broken, because strength of swelling clay rapidly discreased after precipitation, ground water was saturated into gap and cement mixed swelling clay was not filled in certain height. After dealing with it on time and quick construction, the completing time of the South-to-North Water Transferred Project middle route will be flexed.