A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Frozen soil variable stiffness road and bridge transition structure and construction process thereof
The invention provides a frozen soil variable-stiffness road and bridge transition structure and a construction process thereof. The frozen soil variable-stiffness road and bridge transition structure comprises a bridge abutment and a roadbed. The roadbed comprises a graded broken stone hardcore, a reinforced concrete retaining wall, a block broken stone packing layer, a soil filling layer and a rigid butt strap. The reinforced concrete retaining wall is provided with a plurality of filling areas and connected with the bridge abutment. The block broken stone packing layers are arranged in the multiple filling areas, slopes are arranged on the sides, away from the graded broken stone hardcore, of the block broken stone packing layers, and the heights of the slopes are gradually decreased in the direction from the side close to the bridge abutment to the side away from the bridge abutment; the rigid transition slab is borne by the block gravel packing layer and connected with the bridge abutment. According to the variable-stiffness roadbed structure, the differential compaction settlement disease caused by sudden stiffness change of the roadbed under the long-term dynamic load effect is improved through the variable-stiffness roadbed design, the permafrost foundation is prevented from being melted through the cooling effect of the block gravel packing layer, and the durability of road engineering is improved while the problem of bump at the bridgehead is effectively solved.
本申请提供一种冻土变刚度路桥过渡结构及其施工工艺，冻土变刚度路桥过渡结构包括桥台和路基。路基包括级配碎石垫层、钢筋混凝土支挡墙、块碎石填料层、填土层和刚性搭板。钢筋混凝土支挡墙设有多个填充区域，钢筋混凝土支挡墙与桥台连接。块碎石填料层设于多个填充区域内，块碎石填料层背离级配碎石垫层的一侧设置有斜坡，且斜坡的高度在由靠近桥台的一侧向远离桥台的一侧的方向上逐渐减小；刚性搭板被块碎石填料层承载且与桥台连接。不仅通过变刚度路基设计改善路基在长期动荷载作用下因刚度骤变而产生的差异性压实沉降病害，还利用块碎石填料层的降温作用阻止了多年冻土地基融化，有效地改善桥头跳车问题的同时还提高了道路工程的耐久性。
Frozen soil variable stiffness road and bridge transition structure and construction process thereof
The invention provides a frozen soil variable-stiffness road and bridge transition structure and a construction process thereof. The frozen soil variable-stiffness road and bridge transition structure comprises a bridge abutment and a roadbed. The roadbed comprises a graded broken stone hardcore, a reinforced concrete retaining wall, a block broken stone packing layer, a soil filling layer and a rigid butt strap. The reinforced concrete retaining wall is provided with a plurality of filling areas and connected with the bridge abutment. The block broken stone packing layers are arranged in the multiple filling areas, slopes are arranged on the sides, away from the graded broken stone hardcore, of the block broken stone packing layers, and the heights of the slopes are gradually decreased in the direction from the side close to the bridge abutment to the side away from the bridge abutment; the rigid transition slab is borne by the block gravel packing layer and connected with the bridge abutment. According to the variable-stiffness roadbed structure, the differential compaction settlement disease caused by sudden stiffness change of the roadbed under the long-term dynamic load effect is improved through the variable-stiffness roadbed design, the permafrost foundation is prevented from being melted through the cooling effect of the block gravel packing layer, and the durability of road engineering is improved while the problem of bump at the bridgehead is effectively solved.
本申请提供一种冻土变刚度路桥过渡结构及其施工工艺，冻土变刚度路桥过渡结构包括桥台和路基。路基包括级配碎石垫层、钢筋混凝土支挡墙、块碎石填料层、填土层和刚性搭板。钢筋混凝土支挡墙设有多个填充区域，钢筋混凝土支挡墙与桥台连接。块碎石填料层设于多个填充区域内，块碎石填料层背离级配碎石垫层的一侧设置有斜坡，且斜坡的高度在由靠近桥台的一侧向远离桥台的一侧的方向上逐渐减小；刚性搭板被块碎石填料层承载且与桥台连接。不仅通过变刚度路基设计改善路基在长期动荷载作用下因刚度骤变而产生的差异性压实沉降病害，还利用块碎石填料层的降温作用阻止了多年冻土地基融化，有效地改善桥头跳车问题的同时还提高了道路工程的耐久性。
Frozen soil variable stiffness road and bridge transition structure and construction process thereof
冻土变刚度路桥过渡结构及其施工工艺
LI SHUANGYANG (author) / YOU TIANTIAN (author) / YANG JIALE (author) / ZHAO YONGCHUN (author) / JIANG QI (author)
2021-06-18
Patent
Electronic Resource
Chinese
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