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Rock formation vibration-testing apparatus and method

A vibration testing and rock formation technology, which is applied to measuring devices, vibration measurements in solids, and vibration measurements, etc., can solve the problems of easily damaged measuring points and poor measurement accuracy, and achieve low cost, high accuracy, and comprehensive test data. Effect

Inactive Publication Date: 2009-02-18
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] The present invention aims at the deficiencies in the above-mentioned prior art, and proposes a rock formation vibration testing device and method, which overcomes the shortcomings of the previous rock blasting vibration testing method, such as poor measurement accuracy and easy damage to the measuring points, and has high precision, monitoring device, etc. Not easily damaged, comprehensive test data, low device cost, etc.

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  • Rock formation vibration-testing apparatus and method
  • Rock formation vibration-testing apparatus and method
  • Rock formation vibration-testing apparatus and method

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Embodiment

[0029] The project example is a pipe jacking project. The pipe jacking project is located in the silt about 24 meters below the water surface of the bay, the elevation of the center of the pipe jacking is -23.0mm, the thickness of the silt is about 20.1m, and the water depth is about 3.5m. The pipe jacking pipe has an outer diameter of 2.15 meters and a wall thickness of 2.2 cm. Intensified drilling supplementary geological data show that the pile number +528 to +578 is rock, and the total length of the rock section is about 50 meters, and rock blasting is required. Before the blasting construction, the silt in the range of 8.0m×5.5m near the rock interface was reinforced with high-pressure jet grouting piles. Blasting construction is required to ensure that the medium around the rock mass is not disturbed and damaged by the harmful effects of blasting, so as to prevent sudden landslides and water gushing.

[0030] The schematic diagram of the layout of the blasting excavati...

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Abstract

Disclosed are a rock vibration testing device and a method thereof, belonging to the technical field of construction engineering; the device comprises a sensor, a hose, a lead wire, a claw lathe dog, a connecting lathe dog and a protective metal casing; the sensor and the lead wire are connected through a lead wire interface on the sensor; the hose is sleeved outside the sensor; the protective metal casing is sleeved outside the lead wire; the hose is connected with the protective metal casing through the connecting lathe dog; the hose is fixed in a rock bore through the coated claw lathe dog and grout; and the tail end of the lead wire is connected with an automatic data collection device. The invention does not need to worry about the problems that the precision of the sensor can not be ensured as well as the sensor and the lead wire are damaged caused by flying rocks and mobile excavating machinery during the blasting excavation process.

Description

technical field [0001] The invention relates to a testing device and method in the technical field of construction engineering, in particular to a rock formation vibration testing device and method for blasting excavation. Background technique [0002] Blasting is a common method of excavation in tunneling in rocky areas. The vibration generated by blasting will cause the originally stable surrounding rock to lose its bearing capacity or increase the thickness of the loose circle of surrounding rock. Vibration testing is usually used to monitor the vibration effect of the surrounding rock at the project site to determine the relationship between blasting, surrounding rock stability and support design, so as to determine the appropriate blasting scheme on the premise of ensuring the stability of the surrounding rock. At present, the testing method for the vibration response of the surrounding rock in the blasting construction in the engineering field is as follows: select a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H1/00
Inventor 叶冠林张璐璐王建华
Owner SHANGHAI JIAO TONG UNIV
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