Defect reinforcing and processing construction method of drill filling pile

Abstract

The invention discloses a construction method for consolidation treatment of a defective bored pile, which comprises the following steps: 1. measure lofting: according to the result obtained by the sound wave detection of a defective pile foundation, the measure lofting of the defective pile foundation is performed, and the central position of the defective pile foundation and the thickness of the defective position are determined; 2. excavating a central hole: according to the position of the pile foundation undergoing the measure lofting, the hole is excavated from the center of the pile foundation; 3. processing the defective part: when the defective part is reached by manual excavation, the defective part is checked and cleaned, and no less than 0.5m is excavated in thickness; and, 4. casting concrete: reinforcing steel material which is the same as that used in the pile foundation is processed into a reinforcing steel cage for consolidation, the reinforcing steel cage for consolidation is placed on the bottom part of the hole and fixed; the concrete is cast in the mode of layered casting and layered vibration, after casting the concrete, the pile foundation is naturally cured. The method ensures the engineering quality and saves construction cost and time. The method is particularly suitable for the treatment of the casting pile which has high ground water level and big infiltration capacity and of which the defective part is arranged on the medium upper part of the bored pile and less than 10m away from the ground and the diameter is more than 1.5m.

Description

technical field

[0001] The invention relates to a construction method of construction engineering, in particular to a construction method for reinforcing and treating defects of bored cast-in-place piles. Background technique

[0002] At present, bridge construction, which is an important part of highway construction, is developing rapidly. There are various forms of medium and small bridges and overpasses on general highways and high-grade highways. Similarly, there are many structural forms of the foundation of the bridge. Bored piles are used in many foundation structures. However, due to the use of underwater pouring concrete, there will be quality defects of varying degrees such as mud inclusions, floating slurry, and necking during construction. The current method for dealing with such defects is to discard and re-drill holes for filling. This method is expensive and takes a long time; the second is to remove the defect and re-cast the above part after excavation. This...