Fixed lateral limit rock-socketed pile test device and method

Abstract

The invention discloses a fixed-limited rock-socketed pile test device and a method thereof, and relates to the rock-socketed pile technology of rock mass mechanics. The structure of this device is: from bottom to top, the lower cover plate, lower sealing ring, pressure chamber, upper sealing ring and upper cover plate are connected in turn to form the main structure; the sealing nut is screwed into the grouting vent hole, and the screw rod passes through the perforation , screw the screw nut to make the screw screw into the threaded hole of the lower cover; the rock sample is placed in the pressure chamber, and the PVC-U pipe is embedded in the drill hole of the rock sample, and the model pile is inserted into the PVC-U pipe through the central guide pipe, and screwed Open the grouting vent hole and pour the grout. The present invention can simulate the end-bearing characteristics of rock-socketed piles in rocks, use the fixed side limit to simulate the confining pressure conditions of rock-socketed piles in actual rock formations, obtain the law of bearing capacity changing with pile end displacement, and calculate the bearing capacity of pile ends Force, and uniform standards, can achieve multiple industrial replication, suitable for pouring and testing of various types of rock-socketed piles.

Description

technical field [0001] The invention relates to the technology of rock-socketed piles in rock mass mechanics, in particular to a test device and method for fixed-limited rock-socketed piles. Background technique [0002] The pile whose end is embedded in the rock mass is called a rock-socketed pile (also known as a rock-socketed pier). Regardless of the degree of weathering of the rock mass, as long as the pile end is embedded in the rock mass, it can be called a rock-socketed pile. The difference in the characteristics of the rock-socketed piles is caused by the difference in the characteristics of the rock mass. [0003] At present, the model test devices for rock-socketed piles are relatively simple and not systematic enough. Most of them are drilled on the sampled large rock, the bottom of the hole is flattened, and the model pile of reinforced concrete is poured in the hole after the hole is cleared. After the condensation reaches the design strength, the test is carri...

AI Technical Summary

Problems solved by technology

The test results obtained by this method are greatly affected by human error: the size effect is caused by the different sizes of the rock blocks used in the test, and the large difference in the pouring and curing process of concrete also affects the strength of the model pile; The pressure is only the effect of the rock mass structure around the pile, and the confining pressure effect is small, which cannot reflect the confining pressure effect of the rock-socketed pile at a certain depth

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