摘要
我国的三分之二的国土面积为山区,有许多的桥梁建设在峡谷中,峡谷地区一般为裸岩陡坡地貌,且下部河流水深,因此在这种环境条件下进行桥梁建设会难度较大,尤其是桩基础的施工,因此选择恰当的施工方法极其重要。目前桥梁基础结构施工多采用人工挖孔灌注桩、单壁围堰、双壁围堰、钢平台、筑岛围堰以及沉井基础等方法。本文首先对这几种施工技术在一般条件下的优缺点、施工流程、适用条件、和施工中常出现的问题进行了分析,然后着重分析了深水裸岩陡坡条件下的桩基础施工时要注意的问题以及解决办法,进而为深水裸岩陡坡大直径桩基础施工的实施奠定基础。
Two-thirds of China＇s land area is mountainous. There are many bridges built in canyons. The canyon area is gen- erally characterized by bare rock steep slopes and the depth of the lower rivers. Therefore, it is difficult to build bridges under such environmental conditions. Especially for the construction of pile foundations, it is extremely important to choose the proper construction method. Currently, most of the bridge infrastructure construction uses manual digging piles, single-wall cofferdams, double-wall cofferdams, steel platforms, island cofferdams, and caisson foundations. This article first analyzes the advantages and disadvantages of these types of construction technology under normal conditions, construction procedures, applicable conditions, and problems that often occur during construction. Then, it focuses on the analysis of the construction of pile foundations under the condition of steep slopes in deep water and bare rock. The problems and solutions will further lay the foundation for the imple- mentation of the construction of large-diameter pile foundations for steep slopes in deep water.
出处
《科学技术创新》
2018年第26期102-105,共4页
Scientific and Technological Innovation
关键词
桥梁
桩基础
裸岩陡坡
深水
施工技术
Bridges
Pile foundations
Slopes of bare rock
Deep water
Construction technology
