A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Reverse-sequence construction method for underneath passing of existing expressway through road
The invention provides a reversed-sequence construction method for underneath passing of an existing expressway on a road. The reversed-sequence construction method for underneath passing of the existing expressway through the road comprises the following steps that S1, underneath passing bridge construction is conducted on the expressway; and S2, underneath pass bridge construction in S1 comprises the following steps that (1) a step and temporary inverted arch method is adopted for excavation, the upper section of an excavated tunnel is annularly excavated through reserved core soil every time the excavation is circularly conducted by 0.6 m, so that the stability of surrounding rocks is kept, and the steps comprise the upper step and the lower step. The reverse construction method for the road underneath passing the existing expressway has the advantages that operation is easy, the bearing capacity and firmness of steel frames, supports and the like during excavation can be enhanced, the safety of a tunnel can be enhanced, and therefore the danger of harms to workers can be reduced.
本发明提供一种用于道路下穿既有高速公路的逆序施工方法。所述用于道路下穿既有高速公路的逆序施工方法包括以下步骤：S1：对高速公路进行下穿桥梁施工；S2：所述S1的下穿桥梁施工包括如下步骤：(1).采用台阶加临时仰拱法进行开挖，每循环开挖0.6m，对开挖隧道的上断面采用预留核心土环行开挖，以保持周围岩石的稳定，所述台阶包括有上台阶和下台阶。本发明提供的用于道路下穿既有高速公路的逆序施工方法操作简单，可以加强挖掘时的钢架和支护等的承载力和牢固性的优点，致使可以加强隧道的安全性，从而可以减少对工人造成危害的危险性的优点。
Reverse-sequence construction method for underneath passing of existing expressway through road
The invention provides a reversed-sequence construction method for underneath passing of an existing expressway on a road. The reversed-sequence construction method for underneath passing of the existing expressway through the road comprises the following steps that S1, underneath passing bridge construction is conducted on the expressway; and S2, underneath pass bridge construction in S1 comprises the following steps that (1) a step and temporary inverted arch method is adopted for excavation, the upper section of an excavated tunnel is annularly excavated through reserved core soil every time the excavation is circularly conducted by 0.6 m, so that the stability of surrounding rocks is kept, and the steps comprise the upper step and the lower step. The reverse construction method for the road underneath passing the existing expressway has the advantages that operation is easy, the bearing capacity and firmness of steel frames, supports and the like during excavation can be enhanced, the safety of a tunnel can be enhanced, and therefore the danger of harms to workers can be reduced.
本发明提供一种用于道路下穿既有高速公路的逆序施工方法。所述用于道路下穿既有高速公路的逆序施工方法包括以下步骤：S1：对高速公路进行下穿桥梁施工；S2：所述S1的下穿桥梁施工包括如下步骤：(1).采用台阶加临时仰拱法进行开挖，每循环开挖0.6m，对开挖隧道的上断面采用预留核心土环行开挖，以保持周围岩石的稳定，所述台阶包括有上台阶和下台阶。本发明提供的用于道路下穿既有高速公路的逆序施工方法操作简单，可以加强挖掘时的钢架和支护等的承载力和牢固性的优点，致使可以加强隧道的安全性，从而可以减少对工人造成危害的危险性的优点。
Reverse-sequence construction method for underneath passing of existing expressway through road
一种用于道路下穿既有高速公路的逆序施工方法
LIU CHANGQING (author)
2022-08-30
Patent
Electronic Resource
Chinese
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