Superimposed pile self-reflexive force balance load box

Abstract

The invention discloses a stacked pile body self-counter-force balance load box which comprises an upper plate, a lower plate and hydraulic oil cylinders, wherein coaxial center holes are formed in the upper plate and the lower plate; the hydraulic oil cylinders are symmetrically and uniformly arranged between the upper plate and the lower plate, are connected in series through oil feeding and returning pipes and are connected with an oil feeding valve and an oil returning valve of a hydraulic station; an upper piston and a lower piston are arranged in each hydraulic oil cylinder; the top of each lower piston is supported at the bottom of the related upper piston, and a through hole is formed in the center of each lower piston; upper displacement rods are welded on the upper plate and are sleeved with upper protection sleeves; lower displacement rods are welded on the lower plate and penetrate through the upper plate; lower protection sleeves are sleeved on the lower displacement rods. According to the stacked pile body self-counter-force balance load box, the bottom area of a stacked jack is effectively reduced; under the condition that the bottom area is reduced, thrust can be increased, so that a slurry guide hole in the stacked pile body self-counter-force balance load box is larger than a grouting pipe for on-site grouting and can conveniently extend out of the load box for grouting; therefore the authenticity and the effectiveness of detection are guaranteed, and finally the detection is finished according to a standard.

Description

technical field [0001] The invention relates to a detection device for measuring the bearing capacity of foundation piles in the construction of building foundation piles, in particular to a superimposed pile body self-reflexive force balance load box. Background technique [0002] Construction projects, especially the construction of high-rise buildings and large structures, require the use of a large number of pile foundations. According to the requirements of the national code for quality acceptance of foundation and pile foundation projects, static load testing of the bearing capacity of test piles and engineering piles should be carried out to determine and test the bearing capacity of single piles, which is a mandatory clause for the quality acceptance requirements of foundation piles. The reaction device of the traditional initial static load test ballast platform is to use sand bags and concrete prefabricated blocks on the ballast platform to counterweight; stacking ...

AI Technical Summary

Problems solved by technology

The reaction device of the traditional initial static load test ballast platform is to use sand bags and concrete prefabricated blocks on the ballast platform to counterweight; stacking sand bags and concrete prefabricated blocks is very heavy, unsafe, consumes a lot of sand bags, and is slow , Low construction efficiency, low transportation efficiency

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