黄土地区全掏挖基础施工适宜性分析——以河南某特高压输电线路为例

全掏挖施工是人工在地基中直接掏挖出基础形状,插入钢筋笼、灌入混凝土形成基础的一种施工方法。采用全掏挖可以充分利用原状土的强度,减少对地表植被的破坏。通过实地调查当地水窖、窑洞及附近线路基础的处理方法,结合数值分析,分析了晋东南-南阳-荆门1000kV特高压线路河南黄土地段采用全掏挖的适宜性。结果表明,在河南马兰黄土中采用全掏挖有一定的安全度,可以采用。

Bell pile with manual dig aperture is excavated by hand. After the pile has the shape of concrete foundation, the reinforcing cage is inserted and concrete is caste in place. Since the soil above the foundation has its original structure strength, Hand excavated foundation has the advantages over other kind of foundation, besides, it has little damage of the vegetation above the soil. After a thorough survey the numerical calculation, the feasibility of hand-excavated foundation of a 1000kV transmission line in loess is discussed. It is founded that this kind of foundation is suitable in the loess in He 'Nan province.