Bored pile pore-forming quality detecting device and method

Abstract

The invention relates to a bored pile pore-forming quality detecting device. A fluid density signal input interface, an ultrasonic communication interface and a three-dimensional posture interface of a pore-forming detecting host of the bored pile pore-forming quality detecting device are sequentially connected with a fluid density sensor, an ultrasonic launching and receiving sensor and a three-dimensional posture sensor through cable transfer nodes of a take-up and pay-off spool and a cable bus. The cable bus is wound around the take-up and pay-off spool and controlled to be taken up and paid off by the take-up and pay-off spool, the cable bus is taken up and paid off on a depth counting pulley, the depth counting pulley records the take-up and pay-off length of the cable bus, and the depth feedback signal output end of the depth counting pulley is connected with the pore-forming detecting host. A GPS sensor is located over a probe, and the signal output end of the GPS sensor is connected with the GPS signal input end of the pore-forming detecting host. The bored pile pore-forming quality detecting device can detect parameters such as pore diameters, pore depths, perpendicularities, whole-pore mud densities, dreg thicknesses, boring inclination directions and pore opening coordinates of bored pile formed pores, and the bored pile pore-forming quality reliability is ensured.

Description

technical field [0001] The invention relates to the technical field of foundation pile construction in civil engineering, in particular to a device and method for detecting the quality of bored pile holes. Background technique [0002] Bored piles are one of the commonly used forms of foundation piles for buildings, which transfer the load of the superstructure to deep and stable soil or rock layers. Reduce uneven settlement of foundations and buildings. The construction of bored piles is divided into two parts: hole formation and pile formation, among which hole formation is the first link in the construction of bored piles. Because its operation process is completed underground and underwater, quality control is difficult, and complex geological conditions or mistakes in construction may cause problems such as hole collapse, diameter shrinkage, pile hole deflection, and excessive sediment. The quality of the holes directly affects the quality of the piles after concrete ...

AI Technical Summary

Problems solved by technology

Because its operation process is completed underground and underwater, quality control is difficult. Complex geological conditions or mistakes in construction may cause problems such as hole collapse, diameter shrinkage, pile hole deflection, and excessive sediment thickness.

The quality of the hole directly affects the quality of the pile after concrete pouring; the small diameter of the pile hole will reduce the side friction resistance of the pile, the bearing capacity of the pile tip, and the bearing capacity of the whole pile; The upper side resistance increases, but the lower side resistance cannot be fully exerted. At the same time, the concrete pouring amount of the single pile increases, and the cost increases; the deflection of the pile hole changes the vertical bearing and mechanical characteristics of the pile to a certain extent, and weakens the bearing capacity of the pile foundation. In addition, the inclination of the hole will easily lead to problems such as difficulty in hanging the reinforcement cage, collapse of the hole, and insufficient thickness of the reinforcement protection layer; too thick sediment at the bottom of the pile will reduce the pile length, and for end-bearing piles, it will directly affect the end bearing of the pile tip. ability

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