Score urgently. Shaft inspection measurement scheme. 100

In tunnel construction, in addition to increasing the working face by excavating the flat ridge and inclined shaft, the method of excavating the shaft can also be used to increase the working face, and the whole tunnel is divided into several sections, and the sectional excavation is carried out. For example, in the construction of urban underground railways, each underground station is a large shaft, which is excavated with a shield between the stations, and is not affected by the dense buildings and heavy traffic on the urban ground.

In order to ensure that the excavation face in all directions of the underground can be accurately penetrated, the point coordinates, azimuth and elevation in the ground control network must be transmitted to the underground through the shaft, which is called the shaft contact measurement.

In the vertical and contact measurement work, the main azimuth is transmitted, and according to the layout form, there are mainly one well orientation, two well orientation, gyro theodolite orientation and other methods. The specific content is a bit much, you can go and check out the book on this subject, I will give you a link, you can refer to it:

Four points were arranged around the shaft wall to observe the settlement; Two convergence observation lines are set up on the side wall of the shaft in a cross, which are determined according to the situation of the surrounding rock, and a convergence observation section is set up from 5 meters to 10 meters.

-,I really haven't done this before.。

Vertical wells? Measuring the settlement of the cave entrance? Peripheral convergence should be possible. Ha ha.

If there is a requirement for monitoring and measurement in the project department. There should be a technical disclosure.

I really don't know what to do.

Vertical ruler method: The steel ruler is hung from the shaft, and the elevation can be transferred to the top of the shaft by reading the value with a level.

Hope it helps!

It is recommended to use an excavator for slag removal with a diameter of more than six meters!

For example, the grabber slag is removed from the manual multi-template, and the grabber under the slag cannot be caught and needs to be pulled out manually, and the bottom cleaning needs to be manual. The excavator will not be the same as these two to make up.

manual excavation; mechanical excavation; Blow up.

Excavation from top to bottom, when the wellbore is excavated to a certain depth (one section high), the wall is built from the bottom to the top, and the excavation and masonry are alternated. The process sequence in each section of height is to first drill the hole and fire the gun, then install the rock and remove the gangue, and finally carry out the wall masonry.

Before the wellbore is officially excavated, it is necessary to install the sinking derrick at the wellhead, and install the overhead wheel platform and the gangue unloading platform on the derrick. At the same time, the wellbore lock construction is carried out, and the sealing plate, fixed plate and hanging plate are installed. In addition, well-sinking hoists and shaft-sinking winches are installed around the wellhead, and auxiliary production workshops such as compressor fan rooms, ventilator rooms and concrete mixing plants are built.

Once all the preparations have been completed, the official excavation of the wellbore can begin.