Automatic control system for segmental bridge prefabricated line form

Abstract

The invention provides an automatic control system for a segmental bridge prefabricated line form, and belongs to the technical field of segmental bridge prefabrication construction. The invention solves problems that a conventional reconstruction method employing manual operation is slow in measurement and is low in automation degree. The system is used for controlling a forming module group which consists of an end die, a pouring region and a matched region, and the matched region of the forming module group is provided with a matched segment. A pouring segment is formed in the pouring region. The system comprises an automatic measurement and setting unit for measuring and setting the geometric positions of the matched segment and the pouring segment, a central control unit for receivingthe measurement data of the automatic measurement and setting unit and carrying out the calculation of an adjustment quantity, and an automatic adjustment unit for adjusting the position of the matched segment. The central control unit calculates an error of the matched segment according to the data measured by the automatic measurement and setting unit, and controls the adjustment quantity of the automatic adjustment unit. The system can achieve the automatic setting-out and automatic adjustment, is high in measurement precision, is high in automation degree, and is high in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of segmental bridge prefabricated construction, and relates to an automatic control system for segmental bridge prefabricated alignment. Background technique [0002] The prefabricated site of segmental construction bridges is often located near the bridge site, with poor geological conditions, which is prone to displacement of the measurement reference tower, which affects the accuracy of segmental construction matching of the short-line method. Therefore, a measurement method of consolidating the measurement tower with the end form is proposed. This method is to lay out six measurement point components during the setting out stage, and determine the current segment and the matching node by measuring the distance and angle between the measurement point components. The relative position of the segment. Due to the generally poor geological conditions of the prefabricated site, the reference tower and the tar...

AI Technical Summary

Problems solved by technology

At the same time, due to the long time-consuming check of the deviation of the reference tower and the target tower, in actual engineering applications, the check of the reference tower and the target tower will not be carried out before the construction of each segment, and it is generally carried out once a month check

During the one-month construction period, the deviation between the reference tower and the target tower is unknown.

Therefore, when the traditional construction method is used to determine the horizontal position, due to the change of the theoretical center line, there will be an error in the measurement of the relative horizontal position of each segment, and this error will increase rapidly with the increase of the pouring cycle, which will eventually make the bridge The deviation of the central axis exceeds the allowable value range

In addition, the external reference tower is greatly affected by the external environment such as weather, temperature, wind, environmental vibration, etc., which will adversely affect the accuracy of the prefabricated construction of the segmental bridge

[0003] Moreover, manual stakeout is used for traditional section bridge stakeout, and it is necessary to repeatedly check and adjust the position of the matching section according to the measurement data of the total station until the stakeout error requirements are met.

The degree of automation of this process is low. The stakeout measurement program, the matching section position adjustment program and the stakeout accuracy check not only take a long time, but also are easily affected by the operation of the surveyor, and the production efficiency needs to be further improved.

Furthermore, the linear adjustment method of segmental bridges is mostly completed by foreign industry software. It is necessary to manually input the stakeout data and backtest data of each segment into the software, and calculate the stakeout data of the next segment through the software. The process is complicated and tedious

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