Earthwork elevation control method, how to determine the elevation of large excavation earthwork

Before construction, mark the filling and excavation height of each pile, and when it is close to the design elevation, use a level to measure and control it. Elevation control is the most basic.

The temporary leveling point is led to the top ring beam, and the tape measure is pulled down.

Lead the elevation point given by the survey unit to the crane standard section and temporarily set up one.

Leave a few more.

Positioning, measurement and control. Synchronous detection.

Dig the foundation according to the soil quality, the outer edge of the slope, the inner soil is all dug to the bottom of the design foundation, the elevation should exceed 300mm, and there is no depth limit.

The bottom elevation is entered into the outdoor apron to see the excavation depth.

Landlord, if you are using an automatic leveling level, and you are not too troublesome to adjust the zero position of the compensator to make the 2C difference larger, thus changing the elevation.

If you're using an electronic level, it's like the guy upstairs said, no way.

Declare that this method is the accuracy of the level, and in practice, please strictly follow the national measurement law, statutory requirements and related regulations to ensure the accuracy of measurement data.

If you still have any questions, please feel free to share them.

Loyalty.

According to the slope, measure frequently, and control the elevation.

Put the excavation line, all excavated from the top of the slope, make a slope tripod, put the level to see the slope, 5m with an instrument to retest once. That is, the excavation line after putting 5m. And so on.

S-level, or total station measurement.

1. The absence of the original landform elevation does not affect the earthwork excavation. According to the elevation control point, the excavation is carried out in combination with the construction drawing. Without considering the calculation of earthwork, as long as there are construction drawings, coordinates, and elevation control points, the building can be lofed (to determine the excavation area) and the excavation depth can be controlled to reach the base elevation.

2. Use the original geomorphic elevation and post-excavation geomorphological elevation data, and use CASS and other earthwork calculation software to calculate the earthwork quantity. In the excavation process, the original geomorphic elevation is generally used for the control of the current elevation and the elevation of roads and pipelines. When there is no original geomorphic elevation, it can be guided from the elevation control point, and the temporary elevation control point can be set to facilitate the measurement operation.

3. Earthwork excavation steps: 1) Before construction, prepare a special earthwork excavation plan according to the scale and characteristics of the project, and make specific descriptions and treatment methods for natural conditions such as topography, geology, hydrology, meteorology, etc.; 2) Determine the construction method and project schedule requirements, construction conditions and possible construction methods, etc., and select the excavation method. 3) Construction equipment, personnel preparation, and entry.

4) Operate according to the construction plan to ensure safe construction. 5) Earthwork excavation depth elevation, excavation area control, professional surveyors to cooperate with the construction. 6) The rest of the external transportation, reasonable allocation of earthwork, to avoid the waste of secondary reversal.

7) The excavation is completed, and the handover is accepted.

4. The general earthwork excavation project adopts open excavation. Cut-and-cover methods include: comprehensive excavation, part-part excavation, layered excavation and sectional excavation.

Comprehensive excavation is suitable for projects with shallow excavation depth and small scope. When the excavation range is large, it is necessary to use sub-site excavation. If the excavation depth is larger, the layered excavation is adopted, and the stone excavation is often combined with the deep hole ladder blasting (see deep hole blasting) according to the stratification layer.

Sectional excavation is suitable for larger length channels, spillways and other projects. For tunnel excavation, there are excavation methods such as full-section excavation, partial excavation and pilot tunnel method.

You have to see whether the cross-sectional pavement has marked steps, if it is marked, it means that the section includes the amount of steps, and vice versa.

How do you know the type of earthwork if there is no description in the general description of the drawing?

Answer: In the case that there is no description in the general description of the drawing, the category of earthwork can be known through the following two methods:

1.Survey drilling data.

2.The actual excavation situation is determined by referring to the Quota Schedule: Soil and Rock (Platts) Classification Table.

Check out the geological survey report, there will be it above!