Measuring device and detection method for stress and strain between sand body particles

Abstract

The invention provides a measuring device and detection method for stress and strain between sand particles, which includes a protective shell with a spherical shape, the protective shell is provided with a plurality of pull hooks, and the inner wall of the protective shell is equipped with a layer A film-shaped central interlayer, the inner wall of the central interlayer is glued with an inner layer, and the cavity of the protective shell is integrated with a measurement sensing element, a signal acquisition and transmission system, a storage element, a power supply element, and a data processing and analysis element. The device and method can be used for real-time monitoring of the stress and strain inside the coral sand to ensure safety in island and reef engineering construction.

Description

technical field [0001] The invention relates to the field of construction detection of deep coral sand island reef dredging and filling, in particular to a measuring device and a detecting method for stress and strain generated inside sand particles due to interaction after dredging and filling of important engineering reef sands. Background technique [0002] The Nansha Islands are far away from the mainland of China. There are only small-scale buildings on these islands and reefs. Due to the need to expand the islands and reefs in a short period of time, the consolidation time of the coral sand in the later stage is shortened, and the shape of the coral sand particles is irregular, increasing The void ratio of the coral sand is reduced. When it is subjected to a force, the corners are prone to fracture and breakage. Once the engineering construction is carried out on the upper part of the sand filling, the coral sand in the foundation is easily broken due to the increase in...

AI Technical Summary

Problems solved by technology

[0002] The Nansha Islands are far away from the mainland of China. There are only small-scale buildings on these islands and reefs. Due to the need to expand the islands and reefs in a short period of time, the consolidation time of the coral sand in the later stage is shortened, and the shape of the coral sand particles is irregular, increasing The void ratio of the coral sand is reduced. When it is subjected to a force, the corners are prone to fracture and breakage. Once the engineering construction is carried out on the upper part of the sand filling, the coral sand in the foundation is easily broken due to the increase in the gravity of the upper part, causing the foundation to collapse. Increased the instability of engineering safety. Therefore, it is necessary to monitor the stress and strain inside coral sand in real time during engineering construction to ensure the safety of engineering construction.

[0003] At the same time, the existing devices for monitoring stress and strain are all based on the surface layer of particles, which cannot penetrate deep into the particles to detect the stress and strain generated by the interaction of different particles. As a result, researchers only understand the changes in the mechanical properties of the external macroscopic, and it is difficult to analyze the internal fine particles. Explain the macroscopic changes caused by the macroscopic changes

Images