Box body state measurement method in one-dimensional jacking construction process of large box body

Abstract

The invention discloses a box body state measurement method in the one-dimensional jacking construction process of a large box body, which is characterized in that a midline observation ruler is respectively arranged at the front and rear end parts of a longitudinal midline on the top surface of the large box body; simultaneously, an angular point observation ruler is respectively arranged at four corners on the top surface of the large box body; by means of the matching among a total station or a theodolite arranged at the other side of the existing railway, a leveling instrument, the midline observation rulers and the angular point observation rulers, the state data of the longitudinal midline and the four angular points in the jacking process of the large box body can be read out directly in time; calculation is unnecessary; therefore, operators are convenient to adjust the jacking direction and level of the large box body in time; furthermore, the construction precision is high and the observation speed is high; simultaneously, the number, the labor intensity and the time of observers can also be reduced; furthermore, the interference on construction progress is less.

Description

technical field [0001] The invention belongs to the technical field of transportation, in particular to a method for measuring the state of a large box during one-dimensional jacking construction. Background technique [0002] With the rapid development of the national economy, the existing traffic facilities need to be gradually transformed. When the old frame bridge under the existing railway can no longer meet the traffic requirements, or a road intersecting it needs to be built under the existing railway, it is necessary to install the new frame bridge under the railroad track at the junction of the railway and the road. The frame bridge is mainly composed of a large box body and auxiliary facilities such as a bottom plate and a wing plate. At present, the method of setting up large boxes under the existing railway is mainly to adopt the jacking method, which mainly includes two methods of one-dimensional and two-dimensional jacking. Set multiple jacks on the side, and...

AI Technical Summary

Problems solved by technology

However, there are following problems in the one-dimensional jacking method of the large box in the prior art: since the volume and the weight of the large box are very large, the edge angle of the front end of the large box is affected by the degree of soil eating during the jacking process. The influence of these factors will be different, so it is necessary to observe its overall state at any time, and adjust it in time when deviation is found, so as to ensure the construction accuracy and quality

The specific method is to measure the deviation of the longitudinal axis of the box as the observation point and the horizontal deviation of the four corners of the top surface of the box by the staff using a vertical tower ruler and a hanging ball after a pick is pushed into the jack. However, due to this The measurement method requires more manpower and takes a long time, which will undoubtedly affect the construction speed and increase the construction cost

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