【摘要】 介绍了南宁永和大桥北岸沉井的施工。以单管高喷压旋喷形成帷幕墙,减少渗水量,以物探检测帷幕墙体缺陷的位置,避免了处理复喷的盲目性,实现了沉井的排水下沉,并阐述了该地质情况下沉井的下沉规律,对相似地质条件下的沉井施工具有一定的借鉴作用。更多还原

【Abstract】 The construction of the north bank open caisson of Yonghe Bridge in Nanning is presented. In the construction of the caisson, the single fluid, high pressure rotatory jet-grouting technique is used to form a curtain wall around the caisson pit to reduce water seepage, the geophysical prospecting technique is then used to locate grouting defects on the curtain wall to avoid blindness of repeated grouting, and consequently, to realize the smooth sinking of the caisson by dewatering. In the paper, the regularities of caisson sinking under the specific geologic conditions on the north bank side of the Bridge are described as well. The techniques herewith are supposed to be of certain reference to the construction of the caissons under similar geologic conditions.更多还原