Automatic control device and method for head-on earth pressure in mechanical tube jacking construction

Abstract

The invention relates to the technical field of mechanical control of building construction and mainly discloses an automatic control device and an automatic control method for the head-earth pressure in mechanical tube jacking construction. The automatic control device comprises a tube jacking machine, a front shell, hydraulic oil cylinders, a rear shell, a sealing device, a jacking-in tube section, an overflow valve, a hydraulic pump station, a hydraulic pipeline and a hydraulic oil loop, and is characterized in that the tube jacking machine is arranged at the front end of jacking-in direction in the mechanical jacking, the front shell and the rear shell are arranged at the rear part of the tube jacking machine, and are connected by a plurality of hydraulic oil cylinders, sealing devices are arranged outside the hydraulic oil cylinders, the plurality of hydraulic oil cylinders are respectively connected in parallel by the hydraulic pipeline and are respectively connected with the hydraulic pump station, and the hydraulic pump station is provided with the hydraulic oil loop which is provided with the overflow valve. The automatic control device disclosed by the invention can respond to the head-on earth pressure of the tube jacking machine in real time, then the control device automatically adjusts the jacking force of a head of the tube jacking machine, the control oil supply can be realized by the adjustable overflow valve on an oil path, so that the tube jacking machine can respond to the pressure of the head-on earth pressure in real time, the effect of earth pressure balance is realized, and the method is simple and effective.

Description

[technical field] [0001] The invention relates to the technical field of building construction machinery control, and mainly relates to an automatic control device and method for mechanical pipe jacking head-on earth pressure. [Background technique] [0002] Pipe jacking machine is the key construction machinery equipment of trenchless pipe jacking technology. It integrates optical, mechanical, electrical, hydraulic, sensing and information technologies. It has the functions of excavating and cutting soil, conveying soil residue, measuring and guiding deviation correction, etc. It has been widely used in municipal drainage, water supply, electric power, industrial and other pipeline projects . Pipe jacking construction has the characteristics of small excavation volume, high degree of automation, fast construction speed, no damage to existing facilities, no impact on social order, and no climate impact. The head-on soil pressure of mechanical pipe jacking construction will...

AI Technical Summary

Problems solved by technology

Manual adjustment results are imprecise and not strict

In addition, even if an automatic device is used, the speed adjustment of the rear main jack will lag behind, resulting in unfavorable factors such as ineffective adjustment of the excavation speed of the excavation surface, mismatching with the jacking speed and other unfavorable factors, resulting in the inability to adjust and control the head-on soil pressure in time

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