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一、前言常磐公路起点于崎玉县三乡市附近。这是一片夹在江户河和中河之间的沼泽地,标高为1.5～2.5米,软土深达40～50米。该地区因大量抽取地下水,发生过显著的地基沉降。虽然最近加强了抽水规定,地基沉降逐渐减少,但仍未停止。目前,该地区的公路计划用高架桥结构,其基础准备采用长50米的支承桩。在这种地基自然沉降的地区使用长支承桩会受到
I. Foreword Chang-Pan Highway starts at Sanxiang near Saitama Prefecture. This is a wetland sandwiched between the Edo River and Nakagawa, with elevation of 1.5-2.5 meters and soft soil of 40-50 meters. Significant ground settlement has occurred in the area due to the heavy extraction of groundwater. Although the pumping regulations have been recently strengthened, the settlement of the foundation has gradually decreased, but it has not stopped. At present, the region’s roads are planned for viaduct structures and are basically prepared for use with support piles of 50 meters in length. The use of long bearing piles in areas where this foundation naturally settles will be encountered