Method for precisely controlling section of underwater dike core stones
A technology of precise control and cross-section, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problems of offshore positioning measurement, the inability of conventional measurement methods, etc., to achieve real-time three-dimensional dynamic measurement positioning and stakeout, The effect of reducing the total amount of throwing and high precision
Active Publication Date: 2009-10-28
CHINA SHENHUA ENERGY CO LTD +2
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Problems solved by technology
The above-mentioned operations, especially in the operation of filling the gravel layer and embankment core stone, need to be positioned and measured in the open sea, but the conventional measurement methods cannot be applied to the positioning and measured in the open sea
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Embodiment Construction
[0023] The method for accurately controlling the cross-section of an underwater embankment core stone of the present invention includes a method for throwing and filling operations and a preparation method before throwing and filling operations.
[0024] The preparation method before throwing and filling operation is introduced in detail as follows:
[0025] First of all, do a good job in GPS static measurement, solve positioning parameters, set up GPS reference stations, etc., and perform GPS RTK dynamic measurement comparisons on known points to ensure the accuracy of plane and elevation.
[0026] Then, the mesh division in the cushion construction area is completed. The grid division is based on the axis, from the construction start pile number to the end pile number, so as to control the throwing position.
[0027] Next, install GPS positioning equipment on the barge, install a GIB system antenna at the bow and stern of the positioning ship, and input the location of the ...
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The invention discloses a method for precisely controlling section of underwater dike core stones, including a throwing filling work method and a preparing method before throwing filling work. The preparing method before throwing filling work includes: 11. GPS static measuring, resolving positioning parameters, setting work of GPS standard station; 12. completing grid division in the blanket construction region; 13. installing GPS positioning equipment on the barge. The throwing filling work method includes: 21. positioning two anchor machines both in front of and behind the positioning barge, wherein every two anchor positions of four anchor machines has a 45 DEG angle therebetween; 22. stopping the positioning barge on the direction perpendicular to the dike axis; 23. strictly controlling altimetric of throwing filling work in water lever, GPS and RTK combined manner during throwing filling; 24. shifting the positioning barge along the dike axis to a next section for throwing filling under the control of GPS measurement system after throwing filling of one section. The precise underwater dike core stone control method is precise in positioning, capable of evidently reducing total amount of throwing filling, and saving work time.
Description
technical field [0001] The invention relates to a method for measuring and locating an underwater embankment core throwing and filling, in particular to a method for accurately controlling the section of an embankment core by using an underwater grid method. Background technique [0002] Generally, the basic treatment of the port outer channel improvement project is divided into sand blasting cushion, laying drainage boards, laying geotextiles, filling gravel layers and embankment core stones and other links. The above-mentioned operations, especially in the operation of filling the gravel layer and embankment core stone, require positioning and measurement in the open sea, but conventional measurement methods cannot be applied to the positioning and measurement in the open sea. [0003] Therefore, it is necessary to invent a method using dynamic measurement and positioning technology to meet the needs of open sea positioning and measurement. Contents of the invention [...
Claims
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IPC IPC(8): G01S13/06
Inventor 张宝奇凌文刘凤松刘爽
Owner CHINA SHENHUA ENERGY CO LTD