Underground cave multi-facet detection method

Abstract

The invention discloses an underground cave multi-facet detection method. The method comprises the following steps: (1) a probe hole is arranged at a position needing detection on the ground; and (2) a power supply electrode A, a measuring electrode M and a measuring electrode N are arranged in the probe hole, a power supply electrode B is arranged on the ground of the probe hole, and a voltage magnitude delta u at the two ends of a measuring point O is successively measured in the probe hole by using the measuring electrode M and the measuring electrode N according to a set point distance; when the voltage magnitude delta u of the measuring point O is measured, the power supply electrode A, according to a set electrode distance extreme difference, successively enlarges the polar distance between the power supply electrode A and the measuring point O and successively records the voltage magnitude delta u of the measuring point O; at the same time, the current value I of the power supply loop between the power supply electrode A and the power supply electrode B is recorded; and the situations of underground caves can be analyzed and determined according to the curve abnormal characteristics of the B [rho] curve diagram of each measuring point. Compared with the prior art, the underground cave multi-facet detection method has the following advantages: the underground caves can be detected in a direct, rapid, economic and accurate manner, safety risks are eliminated, the application scope is wide, the precision is high, and the like.

Description

Technical field [0001] The invention relates to the field of underground karst cave detection, in particular to an underground karst cave multi-directional detection method. Background technique [0002] In areas where karst caves are developed, in order to ensure the safety of the construction project, the construction parties have invested a lot of manpower, financial resources and time to conduct preliminary exploration of the engineering site, detailed exploration and advance drilling of the pile position, with the purpose of identifying the site and pile position The development of unfavorable geological bodies such as caves and weak interlayers. In fact, even through the preliminary and detailed survey of the engineering site and the use of one pile 1-2 holes in advance for each pile before the pile is formed, it is difficult to prevent the existence of a large number of limestone sites under complex conditions because the drilling is a single hole. The underground karst c...

AI Technical Summary

Problems solved by technology

In fact, even through the preliminary and detailed survey of the project site and the advance drilling of each pile with 1-2 holes before the pile is formed, it is difficult to prevent the limestone site under complex conditions from still having a large number of The underground karst caves have not been exposed and there are still hidden dangers to the safety of half of the rock-socketed and half of the karst caves after the foundation piles are piled up.

Images