Measuring and setting method of hydropower station underground engineering free station setting precision control network

Abstract

The invention discloses a measuring and setting method of a hydropower station underground engineering free station setting precision control network. Through arranging the control network, data is observed by an observation method, and various indexes are measured and calculated according to the obtained data in cooperation with an adjustment algorithm and a formula. The method specifically comprises the following steps that a plurality of 360-degree prism devices are linearly and symmetrically distributed on the upstream side wall and the downstream side wall of an underground workshop to form a corner network; special control points are arranged at the two ends of the central axis of the arranged corner network and are matched with a control network formed by a plurality of 360-degree prism devices for observation; a free setting station is selected between the special control points at the two ends, and measurement is conducted through a full-circle corner method; and when processing is carried out according to the observation data, a Helmholtz adjustment algorithm is used as a core, an independent coordinate calculation model of the j observation point of the ith observation station of the free setting station is set, and analysis is carried out through adjustment calculation of various indexes. By adopting the method, a flexible network distribution form is realized, manpower and material resources are saved, the economic benefit is improved, the measurement precision is improved, and the measurement efficiency is improved.

Description

technical field [0001] The invention relates to the construction field of a hydropower station, in particular to a method for surveying and setting up a precise control network of a hydropower station's underground engineering. Background technique [0002] In the construction of underground engineering of large-scale hydropower stations, special parts such as underground powerhouses need to install high-precision special equipment and on-site construction needs, and special measurement and control networks need to be deployed. The traditional method is generally arranged as a corner network, and the polar coordinate method is used for measurement, stakeout and detection; the special control network established by using the corner network method has low relative accuracy, poor stability, low network observation efficiency, is susceptible to external influences, and is difficult to restore and other shortcomings; the station setting is limited and the accuracy is low when mea...

AI Technical Summary

Problems solved by technology

The traditional method is generally arranged as a corner network, and the polar coordinate method is used for measurement, stakeout and detection; the special control network established by using the corner network method has low relative accuracy, poor stability, low network observation efficiency, is susceptible to external influences, and is difficult to restore and other disadvantages; the station setting is limited and the accuracy is low when measuring stakeout and detection (generated control point encryption error, station centering error and orientation error, etc.)

Images