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一、前 言甘河桥是大同市区至口泉煤矿区的公路桥，运输车辆繁忙，过往行人甚多，旧桥已不能适应，城建规划要求在两个月内拆除旧桥并建起新桥。旧桥为砂岩砌石桥墩砖拱结构的六墩五孔拱桥，桥长30m，宽10m，高6m，R=2m的半圆拱桥，拱高和跨度均为4m，桥墩厚度1.2m，素砼路面厚22cm，桥头两侧筑有5×1.5×4m砌石灌灰浆护坡墙，桥体总拆除方量为1403m~3。桥底部有2m深的板石灌灰浆整体基础。
I. Introduction Gan River Bridge is Datong to the mouth of the coal mine zone highway bridge, transport vehicles busy, many pedestrians in the past, the old bridge has not adapted to the urban planning requirements within two months to demolish the old bridge and the establishment of the new bridge . The old bridge is a six-pier five-hole arch bridge with a sandstone masonry brick pierstructure. The bridge is 30 m long, 10 m wide, 6 m high and R = 2 m. The arch height and span are both 4 m and the pier thickness is 1.2 m. Thick 22cm, built on both sides of the bridgehead 5 × 1.5 × 4m masonry filling mortar wall, the total removal of the bridge side of the amount of 1403m ~ 3. The bottom of the bridge has 2m deep slabstone grout as a whole.