下楼溪中桥钻孔灌注桩首件分析

The first article analysis of downstairs creek bridge cast-in-place bored pile

根据我标段施工情况决定第一棵钻孔灌注桩为下楼溪中桥0#台~6#桩,下楼溪中桥位于福建省漳浦县霞美镇下楼溪河段,该桥跨越下楼溪,桥位距入海口旧镇港直线距离约1 175 m,河流与海直接相连,桥桥位处河面宽约12 m,水深约0.5~2.0 m,河流两侧均为耕地,地面平坦。桥址处河道顺直,桥梁中心线与河流交角110°,为潮汐感潮段。下楼溪中桥下部结构：桥墩采用柱式墩（3柱）＋盖梁,柱径1.2 m,桩径1.5 m,钻孔灌注桩基础;桥台采用三柱式桩柱台,桩径1.5m,钻孔灌注桩基础。

According to bid section construction situation,the downstairs creek bridge Number zero 0-6# pile was decided as the first cast-in-place bored pile,downstairs creek bridge was located in Zhangpu County of Fujian Province Xia Mei Zhen downstairs River,the bridge was across the river down the stairs,the distance from the bridge into the old town of Haikou port is about 1175 m,the water depth is about 0.5 ~ 2.0 m,on both sides of the river were cultivated land,the ground is flat.At the bridge site,the river is straight,the intersection angle of bridge centerline and river is 110°,and it is tide tidal course,The substructure of the downstairs creek bridge： the pier used cylinder pier（3 columns） and coping,the column diameter was 1.2 meter,the pile diameter was 1.5 meter,the foundation was cast-in-place bored pile; The abutment was three-column type abutment,the pile diameter was 1.5 meter,and the foundation was cast-in-place bored pile.