A grounding grid breakpoint diagnostic method for a transient electromagnetic method, based on a transient electromagnetic detection apparatus. The method comprises: (101) disposing a test line at a position above a grounding grid to be diagnosed on the ground, and determining coordinates of a detection point; (102) obtaining information about coordinates of the detection point, and coinciding the center of the transient electromagnetic detection apparatus with the coordinates of the detection point; (103) performing, by the transient electromagnetic detection apparatus, measurement along the test line point by point, so as to obtain measurement data; (104) processing, by using diagram forming software, the measurement data to form a longitudinal resistivity cross-section diagram of the detection point according to a preset formula; (105) determining whether a breakpoint occurs at the detection point according to the longitudinal resistivity cross-section diagram. The method does not depend on a design material of a grounding grid, and can implement non-excavation grounding grid breakpoint diagnosis without outage, thereby reducing economic losses in a diagnosis process.

Grounding grid breakpoint diagnostic method for transient electromagnetic method

The invention discloses a soil slope slip surface comprehensive forecasting method. The technique integrates three geophysical methods of a ground penetrating radar method, a high-density electrical method and a surface wave exploration method, and through different differences of physical properties and method principle, rapid acquisition and real-time data processing and comparison validation of slope slip surface on-site data are realized, so that method can draw on each other's strength and can overcome the problem of nondeterminacy of the single method, and has the advantages of high observation precision, high efficiency, high resolution, visual achievement and high reliability and the like.

Soil slope slip surface comprehensive forecasting method

The invention relates to a shallow water tidal flats foundation stone section detection method, and is used for effectively solving the problem of fast and low cost detection of a foundation stone section in shallow water and tidal flats areas; the method comprises the steps: first of all, a shallow water tidal flats foundation stone section detection device is mounted, and then the following steps of section positioning and scanning, electrode laying, electric parameter measurement, data processing and calculation of stone lost amount are carried out; a mobile measurement device of the detection device is mounted on a ship hull, the ship hull is welded with a support frame, a hydraulic pump is mounted at the upper part of the support frame, a lifting column of the hydraulic pump is vertically mounted in a stand column groove of the lower part of a stand column shell body in a penetration manner and is connected with a connection rod, the connecting rod is connected with an orbital slot of a motor, an electrical prospecting instrument and a wire winding wheel are mounted on the ship hull, the wire winding wheel is connected with a cable bus, and the electrical prospecting instrument is communicated with an electrode change-over switch. The method is simple, easy to operate, low in cost, high in working efficiency, and accurate in detection, guarantees the construction quality, is effectively used in river banks and seacoast dikes, and ensures needs of flood and tide prevention.

Shallow water tidal flats foundation stone section detection method

The invention provides a construction process for building a concrete cut-off wall through water jetting. The construction process comprises the following steps of (1) construction preparation, wherein the step comprises the following steps of 1) lofting a water jetting wall-building construction axis, leveling a field, and paving a rail; 2) lofting the center of the groove section, and carrying out groove section dividing; and 3) moving a wall building machine to the transverse rail, and adjusting and detecting the wall building machine; (2) water jetting and wall building, wherein the step comprises the following steps of 1) grooving the cut-off wall; and 2) pouring concrete; and (3) carrying out integrity physical exploration detection after the cut-off wall is completed. According to the construction process for building the concrete cut-off wall through water jetting, during grooving, an impact column at the lower end of a former is matched with a water guide pipe, the grooving efficiency in the construction process is greatly improved, and meanwhile, during construction of second-stage grooves, the wall building machine former with the vertically-symmetrical inclined nozzlesarranged on the left side and the right side is adopted, the effect of cleaning the irregular lap joint faces of first-stage grooves is greatly improved, potential quality hazards caused by the fact that the lap joint faces are not cleaned in place are reduced, and the engineering quality of the cut-off wall is greatly improved.

Construction process for building concrete cut-off wall through water jetting

The invention relates to a method adopting a transient electromagnetic method and a seismic imaging method to detect gold prospecting holes The seismic imaging method comprises the following steps that: seismic wave signals are processed; according to changing situations of reflected wave lineups, geological anomalies can be inference qualitatively; and according to the speed of a medium on a reflecting interface, the depth of the geological anomalies is calculated The transient electromagnetic method comprises the following steps that: reflected signals of a detected body are received; and resistance anomalies of the detected body can be determined according to the changing situations of detected resistance rate Through comprehensive testing of the seismic imaging method and the transient electromagnetic method, high resistance anomalies existing on the detected body are inferred, and underground hollow holes can be inferred according to the high resistance anomalies The method provided by the invention has been used for testing gold prospecting holes repeatedly, and the method is proved to be effective; and then, the method is used for performing general testing on gold prospecting holes at the left bank of a certain power station, excellent effects are realized, and great economic benefits are obtained

Method adopting transient electromagnetic method and seismic imaging method to detect gold prospecting holes

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Method adopting transient electromagnetic method and seismic imaging method to detect gold prospecting holes