浅谈厚覆砂层岩溶地区桥梁钻孔桩基础施工工艺

本文通过广东省某特大桥钻孔桩基础施工,介绍厚覆砂层岩溶地区桥梁桩基施工常出现的问题、施工工艺、施工安全的保证措施、成桩问题及处理措施。     

太原市长风文化岛跨汾河学府景观桥建设项目可行性分析

可行性研究是建设项目投资前期的一项重要工作,是项目投资决策过程中一个必不可少的程序。本文对太原市长风文化岛跨汾河学府景观桥桥位地质条件、气象、水文、桥型设计、施工方案、工程管理、经济效益等进行了全面分析,认为该项目在技术上和经济上可行,但如何提高项目的偿还贷款能力仍需进一步讨论。     

新亚欧大陆桥沿线矿业城市发展与矿业扶贫初探

分析了新亚欧大陆桥沿线的能源及矿产资源特征，指出了矿产资源开发与提高城市人口素质和促使农村贫困人口脱贫之间的相互关系，进行了沿线矿产资源综合经济评价和城市的职能分类，论证了沿线矿业城市的城镇化水平与经济发展之间的内在联系，提出了依托中心城市建设带动沿线资源开发与加工，依托矿业开发扩大和就业和农村贫困人口脱贫的重要作物以及有主加强沿线矿产资源开发的国际合作，坚持生态环境保护，引导城乡经济协调与持续发     

锄沟（右线）大桥设计

文章介绍了锄沟大桥55m＋4×90m＋55m主跨六跨预应力混凝土连续钢构桥的设计,对该桥的总体设计、结构内力分析以及箱梁施工程序等进行了介绍。     

宽幅多室波形钢腹板桥施工控制技术研究

简述了卫河特大桥工程概况,研究了宽幅多室波形钢腹板桥施工控制技术,介绍了施工监测的内容(挠度监测、应变监测)以及施工监控的方法,并对施工监控的结果进行了分析。     

2×90m叠合拱桥钢箱梁落梁后的施工控制

甬台温铁路雁荡山特大桥主跨为2×90m钢箱梁叠合拱结构,两孔主拱间设钢箱辅助拱。该桥钢箱梁落梁就位后,对该桥成桥施工过程中的线形、应力以及吊杆索力进行计算和监测。结果表明:全桥的应力控制在比较低的水平,终张拉实测索力与目标值比较吻合,全桥的最终线形也接近于设计值。     

Comparison of seismic capacity/demand ratios of two kinds of foundation schemes of Taizhou Bridge

Pile group foundation and caisson foundation are two common foundation schemes of long-span bridges, and the seismic performances of the two kinds of foundations are different. Taking Taizhou Bridge as an example, which is the first kilometer level three-pylon two-span suspension bridge in the world, two foundation schemes are designed for the middle pylon, and two whole bridge models with two different foundation schemes of the middle pylon are established respectively in this paper. The effects of foundation-soil interaction are simulated by equivalent linear soil springs whose stiffnesses are calculated according to m method. Seismic capacity/demand ratios of the two models are calculated. The following conclusions can be drawn: the weak positions of the two schemes are not the same; if caisson foundation is adopted for the middle pylon, the weak position is the bearing capacity of the middle pylon foundation, while if pile group foundation is adopted for the middle pylon, the weak position is the bearing capacity of the side pylon foundation.     

Numerical analysis on bearing capacity of middle pylon caisson foundation of Taizhou Bridge

Because of the computation difficulty of the bearing capacity of large underwater caisson foundation on thick overburden layer ground, the geotechnical software FLAC3D was utilized in the 3D numerical analysis on the bearing capacity of middle pylon foundation. From the computational results, it is concluded that the caisson foundation has a good bearing capacity on thick overburden layer ground and the bearing capacity can be improved assuming that the soil near the area of basal corner is reinforced.     

特大深基坑自凝灰浆挡水帷幕技术

自凝灰浆是性能良好的柔性防渗墙材料.结合目前国内最大的圆形深基坑-武汉阳逻长江公路大桥南锚碇基坑工程,介绍了自凝灰浆的组成、防渗墙施工工艺和施工检测技术.     

福建金门岛的藻类植物

福建金门岛淡水藻类的调查，经鉴定有50属155种21变种1变型（不包括硅藻门），隶属于5个门．它们分别是蓝藻门、甲藻门、裸藻门、绿藻门和黄藻门，绿藻门种类最多，有107种16变种1变型．其中，绿藻门栅藻属的伪瑞士栅藻Scenedesmus pseudohelveticus Kirjakov．和普通栅藻Scenedesum communis Hegew．在我国是第一次报道．