Simulation device and method for evaluating concrete pouring quality

Abstract

The invention discloses a simulation device for evaluating concrete pouring quality. One side of the horizontal device is connected with a vacuum pump through a first conveying pipe, the other side ofthe horizontal device is connected with a vertical device through a second conveying pipe, a pressure gauge and a first valve are arranged on the first conveying pipe, a second valve is arranged on the second conveying pipe, and an exhaust hole with a valve is formed in the upper end of the vertical device. An evaluation method using the device is provided. The whole process of pouring and maintenance of the pressure grouting pile is visually monitored, and the grouting pressure and the lifting rate of the construction key parameters are evaluated through the coarse particle distribution uniformity parameter alpha, the pore volume parameter beta, the density parameter rho and the volume shrinkage parameter [delta]V.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering testing, in particular to a simulation device and method for evaluating the quality of concrete pouring. Background technique [0002] Long auger drilled pressure grouting piles, that is, use long auger drilling rigs to drill holes to the design elevation, use concrete pumps to press out the superfluid fine stone concrete from the bottom of the drill bit, lift the drill bit while pressing the concrete until the pile is formed, and pour the concrete to the design level After the elevation, insert the reinforcement cage into the concrete pile body once to the design elevation with the help of the self-weight of the reinforcement cage or a special vibrating device to form a reinforced concrete pouring pile. Because there is no mud skin on the side of the pile and no sediment at the bottom of the pile, this kind of pile greatly improves the bearing capacity of the pile. [0003] Duri...

AI Technical Summary

Problems solved by technology

However, the traditional method of evaluating the quality of the pile body is to drill the core and take samples after the pile body is maintained and formed, which has the following disadvantages: 1. The concrete test disturbance of the drilled core is relatively large, and the difference from the real state of the pile body concrete is relatively large; 2. It is impossible to observe the collapse of concrete and the uniformity of pile body in real time; 3. It is impossible to realize the comparison of pile body quality under the condition of controlling grouting pressure and lifting speed

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