A Measuring Method Applicable to Fast Lofting Anchor Bolt Hole Position in Large-scale Underground Cavern

A technology of underground caverns and measurement methods, which is applied in the direction of measuring with tilt sensors, measuring devices, and measuring instruments. It can solve the problems of investing large equipment resources and arduous workload, so as to ensure the accuracy of stakeout, clear calibration, and high precision. Effect

Active Publication Date: 2018-09-11
CHINA GEZHOUBA GRP THREE GORGES CONSTR ENG CO LTD
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  • Description
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Problems solved by technology

However, large-scale underground excavation projects often have a large excavation range of hundreds of meters. Such dense bolt holes require surveyors to measure and stake out one hole at a time. The workload is extremely difficult and often requires a lot of manpower and equipment. resource

Method used

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  • A Measuring Method Applicable to Fast Lofting Anchor Bolt Hole Position in Large-scale Underground Cavern
  • A Measuring Method Applicable to Fast Lofting Anchor Bolt Hole Position in Large-scale Underground Cavern

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specific Embodiment 1

[0044] For example, in the Jinsha River Xiluodu Hydropower Underground Powerhouse 1 42m×30m vertically excavated the side wall, the area of ​​1260 square meters is arranged according to the distance of 1.2m×1.2m, which is arranged in a plum blossom shape, and the first row is 30 / 1.2=25 , the second row is 26, 42 / 0.6=70 rows, a total of 25*35 rows+26*35 rows=1785. The specific operation is as follows:

[0045] This method only needs one total station and more than two laser level instruments (reasonably selected according to the actual workload and project period required by the project department) in the process of bolt hole position calibration. This project chooses to use two laser levels due to the narrow working area. spirit level. The total station is responsible for providing the absolute coordinate reference for the laser level (providing the coordinates of the vertical and horizontal axes of the plane and the elevation reference). The Leica total station TS06 with pri...

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Abstract

A measurement method suitable for quickly setting out bolt hole positions in large underground caverns, using the absolute and precise coordinate measurement function of a high-precision mirrorless total station to provide real-time absolute coordinate information for the relative horizontal and vertical datum lines emitted by the laser level, Provide multiple visible laser measurement benchmarks for large-area bolt hole position setting out, calculate the deviation value of the bolt hole design coordinates through the absolute coordinates of the reference lines, and use hand-held rangefinders, steel rulers, vertical rulers and other tools on the spot. Measure and calibrate, use total station to check and verify at any time during the operation, effectively avoid error accumulation and ensure stakeout accuracy. In this way, the purpose of fast and efficient measurement and setting-out of a large area and a large number of bolt holes can be realized.

Description

technical field [0001] The invention relates to a method for measuring setting out, in particular to a method for measuring hole positions of fast setting out bolts in large underground caverns. Background technique [0002] With the acceleration of national infrastructure and energy construction, large-scale underground projects are becoming more and more common, such as large-scale underground mine excavation, large-scale tunnels, urban subways, large-scale underground hydropower plants, etc. In the field of hydropower, medium and large caverns such as the Baihetan Hydropower Station, the underground powerhouse of the Wudongde Hydropower Station, and the underground powerhouse of the N-J Power Station in Pakistan are all super-large projects. As the construction technology and construction methods of underground engineering become more and more advanced, higher requirements are put forward for construction measurement technology, especially in the process of spray anchor s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00G01B5/00
CPCG01B5/00G01C15/008
Inventor 邱章云万山雄田学芝孙泽凤曹鹏亮李铁生李鲁黑丁艳江胡锦和丁光志褚先兵
Owner CHINA GEZHOUBA GRP THREE GORGES CONSTR ENG CO LTD
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