A combined ladder key structure and its construction method

Abstract

The invention relates to the technical field of landslide control and foundation pit support, and concretely relates to a combined ladder key structure and a construction method. The combined ladder key structure comprises ladder key units. Each ladder key unit is formed by a U-shaped cross arm, a rectangular vertical leg and a transverse locking key, wherein one end of the U-shaped cross arm is exposed out of a slide body and rigidly connected to the top of the rectangular vertical leg; the other end of the U-shaped cross arm is placed in a base rock, perpendicular to and in a rigid connection with the transverse locking key; adjacent ladder key units are connected in a stair shape; the rectangular vertical leg of the ladder key unit on the upper part vertically inserted through U-shaped cross arms of the ladder key units on the lower part, and rigidly connected to the same; and the U-shaped cross arm, the rectangular vertical legs and the transverse locking keys are all made from reinforced concrete. By the use of the combined ladder key structure and the construction method, great slide resistance performance, small engineering work, simple construction, low cost and great supporting effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of landslide control and foundation pit support, in particular to a combined ladder key structure and construction method. Background technique [0002] Anti-slide piles are widely used in landslide control and slope protection due to their high rigidity, good stability, convenient construction, and strong anti-slip performance. The working principle of the anti-slide pile is mainly to drive the pile into the bedrock at a certain depth from the slope, and to balance the landslide of the free end of the rock and soil by means of the embedding effect and passive resistance of the rock and soil at the embedded end of the bedrock. Thrust or slope pressure to maintain landslide or slope stability. [0003] In the current design of anti-slide piles, most of them are based on the straight pile structure, and the understanding and use of the full utilization of the rock and soil mass behind the pile and the optimiz...

AI Technical Summary

Problems solved by technology

The existing technology has the following technical problems: First, the measures to increase the cross-sectional area of ​​the anti-slide pile and the amount of reinforcement not only require a large amount of engineering and high treatment costs, but also make the on-site construction more difficult when restricted by the red line of the land or the space of existing buildings , which limits the effective use of traditional anti-slide piles; the second is to set the prestressed anchor cable measures on the pile body. Due to the high cost of the anchor cable and the prestress relaxation loss and corrosion phenomenon of the anchor cable, the durability of landslide or slope control and the Significant lack of reliability

At the same time, the anti-slide piles of the prior art are generally independent of each other, causing some anti-slide piles to bear a large landslide thrust, while some anti-slide piles are in an empty state, resulting in unreasonable utilization of resources and potential increase. project cost

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