滨水道路半路半桥改扩建技术方案研究

Research on Technical Schemes for Reconstruction and Expansion of Half-way and Half-bridge on Waterfront Roads

摘要:

滨水道路改扩建需综合考虑交通、防洪、景观、环保、经济等诸多因素，当道路拓宽受背水侧山体或既有建（构）筑物制约时，采用路基加宽方案往往不易实施。相比之下，采用半路半桥方案对滨水道路进行拓宽改造，可在提升滨水区域交通出行能力的同时，最大化地利用既有道路，减小对临水侧河道行洪影响，具有广阔的应用前景。但是，在半路半桥改扩建过程中，存在着新增桥梁与既有路基衔接、临水侧横向岸坡稳定、半路半桥排水设计、半路半桥施工组织等关键技术问题。为此，以重庆市某滨水道路改扩建工程为背景，通过深入研究，提出了针对上述问题的具体处理措施，以确保半路半桥改扩建工程的技术合理性和施工安全性，也可为同类滨水道路改扩建工程提供经验和参考。

Abstract:

The reconstruction and expansion of waterfront roads need to comprehensively consider various factors such as traffic, flood control, landscape, environmental protection and economy. When the road widening is restricted by the of the mountain or existing buildings (structures) on the backwater side, it is difficult to implement the roadbed widening scheme. In contrast, the use of half-way and half-bridge scheme for the expansion and reconstruction of waterfront roads can not only enhance the traffic capacity of the waterfront area, but also maximize the utilization of the existing roads and reduce the impact on flood discharge in the riverway adjacent to water, which has the broad application prospects. However, during the reconstruction and expansion of half-way and half-bridge, there are several key technical problems such as the connection between the new bridge and the existing roadbed, the stability of the lateral bank slope adjacent to the water, the drainage design of half-way and half-bridge, and the construction organization of half-way and half-bridge. To this end, based on the background of a waterfront road reconstruction and expansion project in Chongqing, through in-depth research, the specific treatment measures to address the above issues are proposed to ensure the technical rationality and construction safety of the half-way and half-bridge reconstruction and expansion project, and can also provide experience and reference for similar waterfront road reconstruction and expansion projects.