Quanzhou Observation Standard 304 Stainless Steel Observation Elevation Iron Bearing Platform Six piece Set Settlement Observation Point
Category:
metallurgy/Stainless steel material/Stainless steel bars
Model:
Brand:
Cangzhou Shuntian
grade:
Observation standard
cross-sectional shape:
round bar
surface treatment:
glossy surface
Processing Technology:
Forging
tensile strength:
370MPa～480MPa
Processing Service:
deep processing
execution standard:
National Standard
quality grade:
A-level
Processing & Customization:
yes
Is it imported:
No
weight:
one
Scope of application:
rail transit
delivery service:
Can be delivered to the factory
Type of goods sales:
spot
Item Number:
twenty thousand one hundred and twenty
warehouse address:
Cangzhou, Hebei
warehouse phone:
fifteen billion one hundred and three million three hundred and seventy-two thousand six hundred and sixty-seven
manufacturer:
Cangzhou Shuntian Steel Pipe Co., Ltd
Retail Price
12.00USD
重量
kg
- Product Description
-
grade Observation standard
cross-sectional shape round bar
surface treatment glossy surface
Processing Technology Forging
tensile strength 370MPa～480MPa
Processing Service deep processing
execution standard National Standard
quality grade A-level
Processing & Customization yes
Is it imported No
weight one
Scope of application rail transit
delivery service Can be delivered to the factory
Type of goods sales spot
Item Number twenty thousand one hundred and twenty
warehouse address Cangzhou, Hebei
warehouse phone fifteen billion one hundred and three million three hundred and seventy-two thousand six hundred and sixty-seven
manufacturer Cangzhou Shuntian Steel Pipe Co., Ltd
Description :
Quanzhou Observation Standard 304 Stainless Steel Observation Elevation Iron Bearing Platform Six piece Set Settlement Observation Point
In order to ensure that the tunnel project can be completed with the required accuracy, which requires high standards for every aspect of the entire project, yesterday I brought you the key points of tunnel measurement. Today, I will introduce several methods of horizontal control measurement and provide detailed measurement steps.
1： Plane control measurement: In tunnel engineering, it is mainly used to determine the plane position of each control point at the entrance, in order to guide the design in reverse underground, guide tunnel excavation, and achieve the required accuracy for penetration.. (Note: The planar control network includes planar control points)
Detailed explanation on plane control measurement in tunnel engineering
1: Alignment method: This method is suitable for short length straight tunnels. We set the entrance points of the straight tunnel as two points, and then mark the centerline direction of the straight tunnel on the ground to obtain the two points located in the straight direction at the measurement location. Using a theodolite, we extend the straight line in the direction of the approximate azimuth using a forward and backward mirror, and measure and calculate the lengths using the theodolite line of sight method. (Note: The relative error of distance measurement cannot exceed 1:5000)
2: Triangle network method: This method is suitable for mountainous areas with long tunnels and complex terrain. It requires measuring all angles and multiple side lengths of the triangle network, or all side lengths, to make it a corner network. The point accuracy of the triangle network is high, which is conducive to controlling the lateral error of the tunnel.
Detailed explanation on plane control measurement in tunnel engineering
2: Wire measurement method: Connect two tunnel entrances and set up a wire. The turning angle of the wire needs to be observed using a U2 level theodolite, and the distance needs to be measured using a photoelectric rangefinder. By reverse calculating the coordinates of two points at the entrance, the distance and azimuth in the direction of the line connecting the two points can be obtained. Based on this data, the excavation direction can be calculated. (Note: The relative error cannot exceed 1:10000)
AfterSalesService :
Key words:- Quanzhou Observation Standard
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