A Method for Excavating Ground Beam Foundation Pit Under the Condition of Uninterrupted River Channel in Cold Regions

Abstract

The invention relates to a method for excavating foundation pits of ground system beams under the condition of non-stop flow of rivers in cold regions, comprising the following steps: step 1, setting a drainage ditch between two shafts; step 2, constructing interception weirs on both sides of the drainage ditch; step 3. Carry out support construction for the closure weir; step 4, construct the excavation area on both sides of the closure weir; step 5, pour pile foundations in the excavation area; step 6, backfill sand in the excavation area before winter Soil; step seven, excavate the foundation pit before the end of winter according to the number of days for the excavation of the ground beam foundation pit and the completion of construction; step eight, organize the completion of the foundation pit construction and backfill before the end of winter and the melting of the permafrost; Using this method to excavate the foundation pit, the temperature in winter is low, and a frozen soil layer can be formed in the ground, which can prevent the water in the drainage ditch from penetrating into the foundation pit, and at the same time, the filling of sand can prevent the water flow from penetrating into the original ground to form ponding, and can Reduce construction procedures, reduce construction costs, and make rational use of natural conditions.

Description

technical field [0001] The invention relates to the field of road and bridge engineering, in particular to a method for excavating ground beam foundation pits under the condition of continuous flow of rivers in cold regions. Background technique [0002] The tie beam refers to the beam that acts as a tie rod, mainly to connect two piles or piers into a whole to bear the force. For example, in a bridge, in order to improve the structure of the columns and piles, the overall rigidity of the pile or pier will be strengthened. A tie beam is added between the two columns. During the construction of the bridge across the river, the foundation pit is located in the river channel, and there is a small amount of water flow in the river channel, which is relatively large during the flood season. Therefore, drainage and water stop measures must be considered during excavation. [0003] During the construction of traditional ground system beams, the water surface elevation in the draina...

AI Technical Summary

Problems solved by technology

[0003] During the construction of traditional ground system beams, the water surface elevation in the drainage ditch is higher than the original ground elevation, and the river water infiltrates into the excavation area to cause water accumulation, and then it is necessary to clean up the accumulation water in the excavation area before excavation operations, increasing the Reduced equipment investment and increased engineering costs

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