Ultra-deep rotary excavating pile concrete pouring construction method for preventing guide pipe cage clamping

Abstract

The invention relates to the technical field of rotary excavating pile construction, and discloses an ultra-deep rotary excavating pile concrete pouring construction method for preventing guide pipe cage clamping. The method comprises the following construction steps that 1) a guide pipe is manufactured, and an annular protrusion is arranged on a guide pipe trunk section; 2) a pile hole is rotatably excavated, and a reinforcement cage is put down; 3) the guide pipe is connected, and a lengthened guide pipe set is formed; 4) the lengthened guide pipe set is put down to the designed elevation; 5) concrete is poured to the set elevation; and 6) the lengthened guide pipe set is lifted, and the guide pipe is dismounted. Through the above steps, when the lengthened guide pipe set is put down and lifted in the reinforcement cage, due to the fact that the outer diameter of the annular protrusion is larger than the diameter of connecting screw threads at the two ends of the guide pipe; and when the center axis of the lengthened guide pipe set deviates from the center axis of the pile hole, the part of the annular protrusion makes contact with the reinforcement cage in advance, the connecting screw threads at the two ends of the guide pipe can be effectively prevented from making contact with the reinforcement cage, scratching between the connecting screw threads and the reinforcement cage is avoided, and therefore the cage clamping accident is effectively avoided.

Description

technical field [0001] The patent of the present invention relates to the technical field of rotary excavation pile construction, in particular, relates to an ultra-deep rotary excavation pile concrete pouring construction method for preventing conduit jamming. Background technique [0002] With the vigorous improvement of the construction capacity of rotary excavation equipment, the depth of rotary excavation irrigation piles is also gradually increased, especially in areas where the depth of bedrock is relatively deep, the hole depth of rotary excavation piles reaches 100m. The increasing depth of excavated piles puts forward new requirements for the quality control of the concrete pouring process. Usually, the concrete pouring of ultra-deep rotary excavation piles adopts the conduit method, and the single-section pouring conduits are butt-jointed and lengthened to the design pouring depth one by one. In addition, during the concrete pouring process of the ultra-deep rota...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultra-deep rotary excavation pile concrete pouring construction method that prevents the conduit from being stuck in the cage, and aims to solve the problem of the cage being stuck between the conduit and the reinforcement cage in the prior art during the construction of the rotary excavation pile

Images