Floodplain area bearing platform reinforced concrete bottom sealing structure and construction method thereof

Abstract

The invention provides a floodplain area bearing platform reinforced concrete bottom sealing structure and a construction method thereof. According to the construction method, concrete steel bars anda pile foundation steel casing are welded to enable bottom sealing concrete to become a multi-point supported reinforced concrete plate unit, then the water pressure and the concrete gravity are bornethrough the plate unit, the bond stress between plain concrete and the casing is substituted, and thus bearing platform foundation cleaning and bottom sealing concrete construction are in a water-free operation environment. Compared with the traditional plain concrete, the thickness of the bottom sealing concrete can be decreased greatly, thus the volume of the bottom sealing concrete and the foundation cleaning volume are decreased, moreover, the mode of foundation cleaning through cooperation of a long-arm excavator and manual work is adopted, compared with the mode of water storage for foundation cleaning through cooperation of a high-pressure water gun and a slurry pump, resources can be distributed reasonably, resource investment is reduced, the construction period is shortened, andthe construction progress is accelerated.

Description

technical field [0001] The invention relates to the field of bridge cap construction, in particular to a reinforced concrete bottom cover structure and construction method of a cap cap in a floodplain area. Background technique [0002] The traditional plain concrete back cover mainly relies on the weight of the concrete itself and the gripping force between the concrete, the steel cofferdam and the steel casing to resist the water pressure formed by the water head difference inside and outside the steel cofferdam. Make a closed environment inside the cofferdam, prevent water from seeping into the cofferdam from the bottom of the cofferdam, and provide a construction platform for the construction of the cap. [0003] Traditional plain back-sealing concrete has the following disadvantages: [0004] 1. The process is cumbersome and complicated, the construction is difficult and the construction period is long; [0005] 2. There is a water head difference inside and outside t...

AI Technical Summary

Problems solved by technology

[0004] 1. The process is cumbersome and complicated, the construction is difficult and the construction period is long;

[0005] 2. There is a water head difference inside and outside the steel cofferdam (the internal and external water pressure is unbalanced), which is prone to cofferdam deformation or even collapse accidents, and the safety factor is low;

[0006] 3. Complicated procedures and working conditions increase the input of manpower and material resources in the force calculation of the steel cofferdam and the observation of the cofferdam;

[0007] 4. The thickness of traditional plain bottom-sealing concrete is often large, so the volume of foundation clearing and back-sealing concrete in the cofferdam is also large, which greatly increases the investment of construction personnel and high construction costs

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