In-situ monitoring method and system for scour of soil around bridge pile

Abstract

The invention discloses an in-situ monitoring method and system for scour of soil around a bridge pile. The monitoring system comprises a feeler lever and a master control device, wherein the feeler lever comprises a lever body and four electrodes which are distributed in the length direction of the lever body at intervals; the electrodes comprise a first electrode, a second electrode, a third electrode and a fourth electrode sequentially from top to bottom; the first electrode and the fourth electrode serve as current electrodes; the second electrode and the third electrode serve as measuring electrodes; the distance between the first electrode and the second electrode is equal to that between the fourth electrode and the third electrode; the master control device comprises a master processor, a feeler lever power supply circuit and a potential measuring circuit; the feeler lever power supply circuit is respectively and electrically connected with the current electrodes and the master processor; the potential measuring circuit is respectively and electrically connected with the measuring electrodes and the master processor; the master processor controls the feeler lever power supply circuit to supply power for the current electrodes, and controls the potential measuring circuit to measure a potential difference between the two measuring electrodes. With adoption of the in-situ monitoring system disclosed by the invention, the scour of the soil around the bridge pile can be stably and efficiently monitored in situ with the simple structure and the low cost.

Description

technical field [0001] The invention belongs to the technical field of scour monitoring of bridge foundations, and in particular relates to an in-situ monitoring method and system for soil scour around bridge piles. Background technique [0002] In most of the bridge failures in recent years, the pile foundation instability caused by the river scouring the soil around the bridge piles is considered to be an important factor. After the water flow washes away the soil around the bridge pier abutment, the stress system of the pile foundation is broken, and there may be serious disasters such as instant collapse and collapse before small damage without warning. Most of these accidents occur in bad weather or extreme sea conditions, when it is not easy to observe the bed condition from the shore or the bridge deck, and it is not easy to carry out corresponding detection on the water surface. Therefore, it is necessary to use in-situ monitoring methods to monitor the erosion pro...

AI Technical Summary

Problems solved by technology

Although the method of determining the position of the water-soil interface by using the change of the electrode ring resistivity is relatively stable, it has the disadvantages of a large number of electrodes, a long test period, and high cost.

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