Submarine pit depth development measuring device and use method

Abstract

The invention provides a submarine pit depth development measuring device and a use method. The device comprises a sleeve, a telescopic member, a first return elastic member, positive and negative electrode sheets, a controller, a signal transmitter, a signal receiver, a measuring device and a weight member. The positive and negative electrode sheets are arranged in the sleeve with spacing and areconnected with the measuring device. The controller is connected with the measuring device and the signal transmitter. The signal transmitter is connected with the signal receiver. The telescopic member is slidably attached to the sleeve and can transmit the weight member. Both ends of the first return elastic member are connected with the telescopic member and the negative electrode sheet respectively. The weight member slidably sleeves the sleeve and is placed on the seabed. When the weight member slides downward, the telescopic member is driven to slide into the sleeve to enable the positive electrode sheet to contact the negative electrode sheet. The measuring device measures the resistance value between the positive and negative electrode sheets and transmits the resistance signal tothe controller. The controller compares the resistance signal with set resistance to determine and control whether the signal transmitter transmits a signal to the signal receiver. The device has theadvantages of simple structure, convenient implementation and high precision.

Description

technical field [0001] The invention relates to a device for measuring the depth development of a seabed pit and a method for using it. Background technique [0002] Submarine pits are one of the common geological disasters in the ocean, and they are often found on the general seabed or at the contact surface between the pile foundation of an oil platform and the seabed. There are generally three reasons for the formation of seabed pits. One is that the positive and negative pressures of strong waves cause circular shear damage to the seabed soil, and some soils are continuously taken out of their original positions, and then formed on the surface of the seabed. The second is that the seabed liquefies, sandblasting occurs, and the ejected sand is taken away, thereby forming pits on the seabed; the third is that some parts of the local seabed where the soil strength is low, erosion occurs, Dimples form on the surface of the seabed. The contact position between the pile foun...

AI Technical Summary

Problems solved by technology

The contact position between the pile foundation of the oil platform and the seabed surface is eroded by the vortex of the water flow, forming a pit. According to the survey, the maximum depth of the pit reaches 2.0m. After the pit is formed, the bearing capacity of the pile foundation of the oil platform is reduced, which is harmful to the safety of the project. unfavorable

Since the formation of pits, the depth and horizontal scale have become larger and larger. Because pits are generally formed under extreme sea conditions, traditional measurement methods are difficult to use; if you want to understand the relationship between the depth and time of pit development, frequent On-site measurement, heavy workload

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