Double-control progressive stable loading method of large-scale compression and direct shear integrated testing instrument

By employing a dual-control progressive stable loading method in a large-scale integrated compression and direct shear testing instrument, integrating strain control and stress control, the problem of long testing cycles for large-diameter coarse-grained soils is solved, achieving improved testing efficiency and data accuracy. This method is suitable for compression tests, direct shear tests, and long-term rheological tests.

CN120685448BActive Publication Date: 2026-07-24CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
2 Cites 0 Cited by

Patent Information

Application Number
CN202510754384.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2025-05-30
Filing Date
2025-06-06
Publication Date
2026-07-24
Estimated Expiration
2045-06-06

AI Technical Summary

Technical Problem

Existing technologies for conducting full-gradation sample model tests on large-particle coarse-grained soils involve long sample preparation and testing cycles, and are complex to operate, making it difficult to meet the needs of simplifying sample preparation and improving testing efficiency.

Method used

A large-scale integrated compression and direct shear testing instrument is adopted, which integrates two testing methods: strain control and stress control. Through an automatic control system, dual-control progressive stable loading is carried out to achieve comprehensive control of strain and stress, avoiding step-by-step changes in loading. The strain rate is monitored and controlled in real time, and the control mode is automatically switched according to the test requirements.

Benefits of technology

It simplifies the sample preparation process, improves testing efficiency, and provides more accurate data on the creep and rheological deformation characteristics of rockfill under long-term loads, meeting the automatic control requirements of compression tests, direct shear tests, and long-term rheological tests.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a double-control progressive stable loading method of a large compression and direct shear integrated tester, integrates strain control type and stress control type two test methods, and an automatic control system is switched according to a preset test scheme according to test requirements, can perform sustained stable loading, and the control mode in specific tests can be strain stress type comprehensive control, or strain type and stress type control respectively. The stress level borne by the sample is progressively changed, so that the stepwise change of the grading loading is avoided. The compression / direct shear conventional mechanical property test, long-term compression / direct shear rheological test can be performed, and the comprehensive test combining the mechanical property test and the long-term rheological test is realized.
Need to check novelty before this filing date? Find Prior Art