Construction method for changing support of foundation pit at irregular place of rampway

Abstract

The invention discloses a construction method for changing a support of a foundation pit at an irregular place of a rampway, and the construction method comprises the following steps of (1) setting supporting piles on the outer circumferential direction of a rampway irregular place, placing an inner support system on the inner side of each supporting pile, and digging a foundation pit; (2) paving a rampway irregular-place soleplate inside the foundation pit, and building an inner wall and an outer wall on two sides of the rampway irregular-place soleplate; (3) backfilling between the supporting piles and the outer wall; (4) respectively binding two ends of a reinforced steel bar of a rampway roof beam with sliding ribs which are reserved on the inner wall and the outer wall; (5) respectively joining two ends of a reinforced steel bar of a support changing beam with the inner wall and the outer wall; (6) pouring the support changing beam concrete; (7) disassembling the inner suppot system; and (8) continuously binding the reinforced steel bar of the rampway roof beam and the reinforced steel bars of the inner wall and the outer wall of the rampway, and then binding the reinforced steel bar of the rampway roof so as to make the reinforced steel bar of the rampway roof connected with the reinforced steel bar of the rampway roof beam and the reinforced steel bars of the inner wall and the outer wall of the rampway; and finally pouring the concrete. Due to the adoption of the method, the support changing system is balanced and stable to stress and sufficient in strength.

Description

technical field [0001] The invention relates to a construction method for brace replacement of foundation pits, in particular to a construction method for brace replacement of foundation pits at irregular-shaped slopes. Background technique [0002] In the deep foundation construction of high-rise buildings, the foundation pit support project has a long construction period and high cost, which is the key stage of the whole project. There are many design forms of foundation pit support, but limited by the location of the project and geological conditions, there are often few economical and applicable support forms. At present, the concrete internal support system has been more and more used in deep foundation pit support projects because of its low requirements on the surrounding environment and convenient construction. Demolition is an inevitable process. In the construction of the car ramp in the basement, when the ramp is at a special-shaped corner, the force is complica...

AI Technical Summary

Problems solved by technology

[0012] Although the 1st to 8th patents have a series of advantages, they cannot solve a series of problems such as the construction of special support technology at the special-shaped corner of the ramp when the ramp is in a special-shaped corner when the force is complicated during the construction of the basement car ramp. , so as to remove the inner support of the foundation pit, and then carry out the subsequent ramp construction to ensure the safety of the ramp construction

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