岚马线水泉沟转体桥修复方案比选

The Comparison and Selection Reparation Plans of Lanma Artery Shuiquan Ditch Twist Bridge

岚马线水泉沟桥建成于 1994年 5月 ,为 1.0m～ 45 .0m钢架拱桥 ,转体施工。建成后 ,由于尖山矿水管在桥面上通过 ,且大吨位、超载车辆过往频繁 ,致使该桥两侧主拱肋出现裂缝 ,微弯板裂缝严重 ,成为险桥。提出了 3种修复方案 :① 在旧桥位上方建新桥 ;② 在原桥右侧建新桥 ;③ 加固方案 ,全部更换微弯板及桥面铺装。对 3种方案进行了分析、比选 ,选择了第 1种方案 。

Lanma artery,shuiquan ditch bridge was built in may,1994. It is rigid-framed structure arch bridge,twist construction. After it was built the waterpipe of jianshan mine had been going through the bridge surface and heavy tonnage and overloading vehicle had made it frequent traffic, so crevices emerged on both sides of main arch ribs and minute curved plates crevices were serious. These made it become a danger bridge. The paper suggested three repair programs. First,we should build a new bridge above the old one. Second,we should build a new bridge on the right side of the old one. Third,we should renew the old one and replace all the minute curved plates and bridge surface equipment with new one. We compared and analyzed the three plans. Last we chose plan No.1. This plan seemed as an innovation design.