软基现浇梁钢管支架施工方法研究

Study on Cast-in-situ Beam Steel Tube Support Construction Method of Soft Foundation

现浇箱梁在施工过程中主要采用满堂支架、门式支架、钢管立柱等施工方法,在地基承载力较差的施工条件下,满堂支架、门式支架存在基础处理难、基础处理复杂等问题,钢管立柱方案较为可行。对于珠三角地区的软土地基,钢管立柱基础处理需要耗费一定数量的混凝土或钢管,成本较高。结合该问题,提供一种利用预应力管桩及钢管柱作为基础的施工方案,可有效解决实际需求。

The construction methods of full support, portal scaffold and steel tube upright are mainly used in the construction process of cast-in-situ box beam. Under the construction condition of poor subgrade bearing capacity, there are problems hard and complex to treat the foundations of full support and portal scaffold, but the steel tube upright scheme is feasible. For the soft soil subgrade of Pearl River Delta, the steel tube upright foundation treatment is required to consume a certain quantity of concrete or steel tube. Its cost is higher.According to this problem, a construction scheme of using the pre-stressed pipe pile and steel tube column as the foundation is provided, which can efficiently solve the practical demands.