Contact measurement method based on application of laser plummet
A technology of laser plummet and measuring method, which is applied in the direction of active optical measuring devices, measuring instruments, measuring devices, etc., can solve the problems of low transmission efficiency of above-ground and underground points, low observation accuracy, etc., and save investment in personnel and equipment , reduced workload, high precision effect
Active Publication Date: 2021-11-30
CCCC SECOND HARBOR ENG
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Problems solved by technology
[0004] Another object of the present invention is to provide a method of contact measurement based on the application of laser plummet to solve the technical problems of low transmission efficiency of above-ground and underground points and low observation accuracy in the connection measurement of subway construction control network and tunnel shaft construction connection measurement
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Embodiment 1
[0038] Such as figure 1As shown, the laser plummet is used for contact measurement. On the ground, that is, the ground above the tunnel shaft, the laser plummet is set up at a convenient location for projection. After accurate leveling, the laser beam 2 is turned on for vertical projection. Make marks on the positioning board inside, and complete the four-point projection according to the four 90° directions marked on the instrument respectively. The intersection points connected by diagonal lines are the vertical projection points, and mark them well. After the projecting work is completed, the prism 3 for observation is replaced on the base of the laser plummet on the ground, and the prism 3 for observation is erected underground at the position of the vertical projection point, accurately centered and leveled, and the prism is erected at the vertical projection point At 3 o'clock, set up the prism base 4 above the positioning plate 5 in the tunnel, set the prism 3 on the pr...
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The invention discloses a contact measurement method based on a laser plummet, which uses the laser plummet to set a vertical projection point, and directly replaces the prism at the position of the laser plummet, eliminating the trouble of hanging steel wires and not needing to consider the outside world The impact of the environment on the stability of the steel wire reduces the workload of frequently adjusting the prism. The total station is used for automatic observation of the prism, and there is no need to paste reflective patches on the steel wire. Manual aiming and measurement avoids measurement errors caused by human factors It improves the efficiency and accuracy, and saves time. The above-ground and underground measurements can be carried out separately, which saves the investment of personnel and equipment, and the obtained data has a small amount of calculation, less cumulative errors, and high precision.
Description
technical field [0001] The invention relates to the technical field of connection measurement of a subway construction control network. More specifically, the present invention relates to a contact measurement method based on the application of a laser plummet. Background technique [0002] Contact survey is a comprehensive survey work that transmits the ground coordinates, azimuth and elevation to the underground tunnel as the starting data for various underground survey work. The function of contact measurement is to transmit the ground measurement control network to the underground, establish an underground construction measurement control network, and carry out measurement and stakeout of underground construction structures and other measurement work. At present, the commonly used contact measurement method is to hang the steel wire above the shaft, and two or three total stations observe the distance and azimuth of the steel wire above and below the ground at the same ...
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IPC IPC(8): G01C15/00
CPCG01C15/00G01C15/004
Inventor 丰冬冬黄敏孔凡荣朱潇潇陈龙黄留玉桂德明刘青山张成张喜春李宝成
Owner CCCC SECOND HARBOR ENG