Method for constructing special shaped deepwater cofferdams on steep rocky riverbeds
A construction method and technology of cofferdam, applied in the direction of infrastructure engineering, construction, etc., to achieve the effect of high construction feasibility and low construction cost
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[0022] This example is in figure 1 The environment shown requires the construction of bridge foundations 5, figure 1 Among them, the riverbed below the water level 2 is a rocky riverbed, that is, the rock mass 3. The rock quality of the rock mass 3 is relatively hard, and the rock surface of the riverbed surface 1 has a relatively large slope, so it is not suitable for slotting or other methods to fix the enclosure. Weir wall6.
[0023] see figure 2 and image 3 , the cofferdam in the present embodiment is constructed according to the following steps:
[0024] 1. The prefabricated cofferdam wall 6 is provided with grouting pipes 7 vertically and vertically penetrating through the cofferdam wall 6, and the grouting pipes 7 are spaced and evenly arranged in the cofferdam wall 6;
[0025] 2. Sink the cofferdam wall 6 to the river bed, keep the top of the grouting pipe 7 exposed above the water level 2, and use the grouting pipe 7 to flush the river bed with jet water. The fl...
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