Bottom Stress Test Device for Cast-in-situ Pile

Abstract

The invention relates to a device for monitoring the soil pressure and bearing capacity at the bottom of cast-in-situ piles, in particular to a stress test device at the bottom of cast-in-situ piles; the stress test device at the bottom of cast-in-situ piles includes: a pressure box; Pipe, elastic ring, observation cable; the lower end of the elastic ring is connected to the telescopic rod, the other end of the telescopic rod is connected to the pressure box, the outer side of the telescopic rod is sleeved with a guide tube, and the observation cable is connected to the pressure box along the telescopic rod; the structure of the present invention Simple and easy to install, the stretching characteristics of the elastic ring ensure that the steel cage plays a role of buffering and protecting the pressure box during the pile setting process, and the elastic deformation accumulated by the elastic ring will be gradually released during the fine adjustment of the height of the steel cage, pushing the pressure box to be tightly connected with the pile subsoil contact, the invention can effectively monitor the stress state at the bottom of the pile, and has reliable technology, low cost and good practical application effect.

Description

technical field [0001] The invention relates to a device for testing soil pressure and bearing capacity at the bottom of cast-in-situ piles, in particular to a stress test device at the bottom of cast-in-place piles. Background technique [0002] Cast-in-situ piles are often used in the foundation engineering of high-rise buildings and large bridges to fully transfer the superstructure load to the deep soil layer, thereby solving engineering problems such as bearing capacity and settlement of large buildings. The bearing capacity of a pile includes two parts: the pile side bearing capacity and the pile bottom bearing capacity. The development process of each part's bearing capacity and the determination of the ultimate bearing capacity are important issues in engineering design and construction. The monitoring of pile bottom stress is of great significance for understanding the working state of cast-in-situ piles, safety monitoring and feedback design. [0003] It is more a...

AI Technical Summary

Problems solved by technology

[0005] The pile bottom stress testing device for cast-in-situ piles provided by the present invention solves the problem that the pressure box in the prior art cannot be effectively installed or the method of using a steel bar meter can cause monitoring Problems such as large error in results, low test accuracy, and difficult analysis

Images