Post grouting pile indoor long-term test device for simulating underground water flowing and test method thereof

Abstract

The invention discloses a post grouting pile indoor long-term test device for simulating underground water flowing, the post grouting pile indoor long-term test device includes a test box and a dynamic water simulation device, the dynamic water simulation device is used for pouring a water flow into the test box for simulating the underground water flowing, the test box is internally provided with a simulating pile, the lower end of the simulating pile is provided with a slurry outletting hole, the upper end of the simulating pile is connected with a grouting device for cement slurry perfusion; the test box is provided with a lever frame, one end of the lever frame is rotatably connected with the test box, the other end of the lever frame is hung, and the hung end is connected with a weight loading device. The post grouting pile indoor long-term test device for simulating the underground water flowing solves post grouting bearing tests under the condition of simulation of the underground water flowing, the actual grouting process and the cement slurry condensation rate after the grouting can be fully understood, the cement slurry dosage can be clear, cost can be saved, and by post grouting pile indoor long-term tests for simulating the underground water flowing, the rule of grouting pile long-term bearing performance can be disclosed, and the post grouting technology can be more perfect.

Description

technical field [0001] The invention relates to a grouting pile test device and a test method in the field of civil engineering, in particular to an indoor long-term test device and a construction method of a post-grouting pile simulating groundwater flow. Background technique [0002] Post-grouting technology plays an important role in improving the bearing capacity of pile foundations. Many scholars at home and abroad have done corresponding indoor test analysis and research on the bearing mechanism of post-grouting piles, and obtained a series of fruitful theoretical and practical application results. However, most post-grouting theories are based on no groundwater or static groundwater obtained under the conditions. There are two ways for the formation of groundwater. One is that groundwater forms dynamic water due to the flow of water due to the difference in water head in the area; the other is that groundwater leaks and forms dynamic water due to defects and damages ...

AI Technical Summary

Problems solved by technology

There are few studies on grouting theory under the condition of groundwater flow. Most of the research on the theory of grouting after indoor model piles does not consider the groundwater or the groundwater static condition, but the diffusion of grout under the groundwater static condition and the groundwater flow condition. The law and diffusion mechanism are very different. It is unreasonable to use the conclusions obtained from the model test under the static groundwater condition to guide the grouting engineering practice under the groundwater flow condition. in-depth study

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