Construction method suitable for mountain river rock stratum surface bridge foundation

Abstract

The invention relates to the technical field of bridge engineering, and particularly relates to a construction method suitable for a mountain river rock stratum surface bridge. The construction method is used for bridge construction on the rock stratum surface of a river. The rock stratum surface comprises a first area with high terrain and a second area with low terrain. The construction method comprises the following steps that steel pipe sinking piles are constructed on a covering layer of the second area until the steel pipe sinking piles abut against the second area; a foundation pit is excavated in the covering layer of the rock stratum surface until the pit bottom of the foundation pit reaches a preset position; a water stop structure is constructed in the foundation pit; an expanded foundation is constructed on the first area in the foundation pit; and bridge foundation construction is completed on the expanded foundation and the steel pipe sinking piles. The problem that the depth of the covering layer of the rock stratum surface with high terrain is insufficient, and consequently only drilling and other schemes need to be adopted for bridge foundation construction is solved. According to the scheme, a heavy crane and other large equipment do not need to be used, materials are obtained according to the local conditions, the economic cost is saved, and the construction period is shortened.

Description

technical field [0001] The application relates to the technical field of bridge engineering, in particular to a construction method suitable for bridge foundations on rocky layers of rivers in mountainous areas. Background technique [0002] Flash floods often occur in mountainous river areas, causing bridges to be washed away and traffic to be interrupted. In order not to affect local travel and quickly restore traffic, steel trestle bridges are often used to replace water-damaged bridges to meet local traffic needs. [0003] However, in mountainous river areas, there are often sandy rock interface interfaces, and the interface is mostly inclined rock surfaces. Because the thickness of the sediment or other soft layers covered on the surface of the rock layers varies greatly, the sediment and other covering layers on the higher rock layers thinner. Therefore, the depth of insertion and driving of the construction pile position on the higher rock surface is shallower. Con...

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Problems solved by technology

[0004] The embodiment of the present application provides a construction method suitable for bridge foundations on the rock surface of mountainous rivers to solve the problem of insufficient depth of covering layers such as sediment that can be drilled when constructing bridge foundations on rock surfaces with high terrain in the related art Resulting in an increase in the cost of bridge foundation construction

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