Method for controlling drawing of excavation outline in three-centered arch and fork construction of sinking and driving engineering
A technology of control lines and three-center circles, which is applied in the direction of earth square drilling, mining equipment, tunnels, etc., can solve the problems of high labor intensity, large design errors, time-consuming and laborious problems, etc., and achieve improved line drawing efficiency and design errors. Small, accurate positioning effect
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[0021] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0022] Such as figure 1 , figure 2 and Figure 4 As shown, the section of the three-center circular arch roadway fork is a gradual cross section, and the section of the fork from the opening to the fork core (commonly known as the tip of the nose) gradually expands from small to small. The law is that the vault climbs vertically according to a fixed slope; The sloped side wall on the side of the fork extends at a fixed slope. Therefore, before entering the fork for construction, two control lines parallel to the vault and the sloped side wall can be set to control the height and width of the roadway at the current working face of the fork respectively. For the convenience of operation and memory, in the present invention, the plumb distance between the vault control line p and the fork vault, and the distance between the control line q of the hypotenuse w...
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