A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bridge-tunnel joint tunnel broadening structure and bridging construction method
The invention discloses a bridge-tunnel joint tunnel broadening structure and a bridging construction method. The method comprises the steps of carrying out excavation construction on a tunnel exit main tunnel through an annular excavation reserved core soil method, and enabling the width of a tunnel portal section to be greater than the width of a tunnel main body section; carrying out bridge abutment construction in the tunnel exit main tunnel; after the abutment construction is completed, carrying out backfill construction on the abutment back of the abutment; mounting a bridge erecting machine on the abutment back; conducting beam piece erecting construction on the tunnel portal section through the bridge erecting machine; and carrying out mold-building secondary lining construction after the beam pieces are erected. According to the invention, the tunnel exit bridge-tunnel joint part is widened, the width of the widened structural section is consistent with the clear width of theconstruction clearance of a tunnel emergency stop area, so that bridge-tunnel joint and bridging construction of the double gird bridge erecting machine are met. Meanwhile, the emergency stop area secondary lining formwork trolley can be comprehensively utilized for constructing a tunnel portal lining, and the cost generated by formwork modification is reduced.
本发明公开了一种桥隧衔接部位隧道扩宽结构及架桥施工方法，包括以下步骤：通过环形开挖预留核心土法对隧道出口正洞进行挖掘施工，使隧道洞口段宽度大于隧道主体段宽度；在隧道出口正洞内进行桥台施工；所述桥台施工完成后对所述桥台的台背进行回填施工；在所述桥台台背上安装架桥机；通过所述架桥机在隧道洞口段进行梁片架设施工；所述梁片架设完成后进行模筑二次衬砌施工。本发明对隧道出口桥隧衔接部位进行扩宽，扩宽结构截面和隧道紧急停车带建筑限界净宽一致，从而满足桥隧衔接及双导梁架桥机架梁施工，同时能综合够利用紧急停车带二衬模板台车对洞口衬砌进行施工，减少模板修改产生的费用。
Bridge-tunnel joint tunnel broadening structure and bridging construction method
The invention discloses a bridge-tunnel joint tunnel broadening structure and a bridging construction method. The method comprises the steps of carrying out excavation construction on a tunnel exit main tunnel through an annular excavation reserved core soil method, and enabling the width of a tunnel portal section to be greater than the width of a tunnel main body section; carrying out bridge abutment construction in the tunnel exit main tunnel; after the abutment construction is completed, carrying out backfill construction on the abutment back of the abutment; mounting a bridge erecting machine on the abutment back; conducting beam piece erecting construction on the tunnel portal section through the bridge erecting machine; and carrying out mold-building secondary lining construction after the beam pieces are erected. According to the invention, the tunnel exit bridge-tunnel joint part is widened, the width of the widened structural section is consistent with the clear width of theconstruction clearance of a tunnel emergency stop area, so that bridge-tunnel joint and bridging construction of the double gird bridge erecting machine are met. Meanwhile, the emergency stop area secondary lining formwork trolley can be comprehensively utilized for constructing a tunnel portal lining, and the cost generated by formwork modification is reduced.
本发明公开了一种桥隧衔接部位隧道扩宽结构及架桥施工方法，包括以下步骤：通过环形开挖预留核心土法对隧道出口正洞进行挖掘施工，使隧道洞口段宽度大于隧道主体段宽度；在隧道出口正洞内进行桥台施工；所述桥台施工完成后对所述桥台的台背进行回填施工；在所述桥台台背上安装架桥机；通过所述架桥机在隧道洞口段进行梁片架设施工；所述梁片架设完成后进行模筑二次衬砌施工。本发明对隧道出口桥隧衔接部位进行扩宽，扩宽结构截面和隧道紧急停车带建筑限界净宽一致，从而满足桥隧衔接及双导梁架桥机架梁施工，同时能综合够利用紧急停车带二衬模板台车对洞口衬砌进行施工，减少模板修改产生的费用。
Bridge-tunnel joint tunnel broadening structure and bridging construction method
桥隧衔接部位隧道扩宽结构及架桥施工方法
ZHANG ZHOUCHANG (author) / HUANG GUI (author) / LIANG FU (author) / ZHANG JIEKE (author) / XIE WEIFENG (author)
2020-06-12
Patent
Electronic Resource
Chinese
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