A device for adjusting the vertical slope of box culvert jacking and its monitoring and control method

Abstract

The invention discloses an adjusting device for a longitudinal slope of jacking of a box culvert and a monitoring and controlling method thereof. The adjusting device comprises a monitoring system, ananalysis system and an adjustment system. The monitoring system transmits the elevation information of the box culvert front end monitored in real time to the analysis system. The analysis system isused for analyzing the elevation information, and the relative elevation difference is compared with the set warning threshold value. If the relative elevation difference exceeds the set warning threshold value, an adjustment command is issued to the adjustment system. The adjustment system controls the longitudinal slope of the jacking of the box culvert according to the adjustment command. According to the adjusting device for the longitudinal slope of jacking of the box culvert and the monitoring and controlling method thereof, the real-time monitoring of the elevation of the box culvert inthe jacking process is realized, and adjustment can be carried out in real time, so that the phenomena of ''head lowering'' and ''head rising'' of the box culvert are restrained, and it is ensured that that the elevation difference of the box culvert is within the allowable range of the standard to realize the automatic rectification of the box culvert in the elevation direction.

Description

technical field [0001] The invention relates to a box culvert jacking construction technology, in particular to a device for adjusting the longitudinal gradient of box culvert jacking and a control method thereof. Background technique [0002] In recent years, with the acceleration of road construction in our country, many level crossings between railways and highways have appeared. In order to relieve traffic pressure and improve the safety of traffic, box culverts passing under railways have become a common form to solve this problem. The box culvert jacking method is to jack reinforced concrete box culverts under the existing lines to form different underground traffic passages to facilitate the passage of vehicles. The general construction process of box culvert jacking is to excavate the working foundation pit on the side of the railway line jacking, and do a good job of protecting the working foundation pit, then pour slides in the pit, pour reinforced concrete box cul...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned measures to adjust the longitudinal slope of the box culvert have certain defects, such as the slope of the sliding head and the slope of the bow slope are often uncontrollable. If the slope is too large, the front end of the box culvert will "raise"; Weak foundations will still "stick their heads"

Other corrective measures to increase the bearing capacity of the foundation by replacing the foundation soil and extending the length of the slideway need to be carried out on the basis of continuous monitoring of the elevation, which requires continuous observation, which is not a small task for the monitoring personnel. challenge

Especially when the jacking distance of the box culvert is long, it is difficult to determine the length of the foundation to be reinforced

If the box culvert once "tie the head", all the remaining foundation soil in the forward direction will be reinforced or the slide board will be extended, which will inevitably cause certain losses

Therefore, the entire correction process requires a lot of manpower and material resources, and it is difficult to achieve real-time monitoring and real-time adjustment

[0007] At present, no intelligent solution has been proposed for the problems existing in the adjustment method of the longitudinal slope of the above-mentioned box culvert

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