Level Metre

Theme of the laboratory work

For drawing the altimetric profiles (longitudinal and transversal) it is necessary the knowledge of the constructive types of level metres and also of the way of functioning.

Data

1. The elevation of the support bench marks (ZR = 386.75 m)

2. The corresponding readings on the rod of each traverse point (L2, L0, L1)

3. The distances determined on field by the optical method between the station point and the aimed points

4. Site plan sketch

The application will consist of:

1. Description of the level metre (component parts, constructive types, axes and movements)

2. Measurements and drawing of the longitudinal profile between points S-12

3. Determination of the concrete quantity required for making a straightway between A and B

Station Point Aimed Point L2

(m) L0

(m) L1

(m)

S R 1.903 1.790 1.678

1 1.677 1.658 1.640

2 1.504 1.485 1.466

3 1.512 1.492 1.472

4 1.369 1.348 1.327

5 1.381 1.358 1.336

6 1.233 1.210 1.187

7 1.235 1.210 1.186

8 1.092 1.067 1.042

9 1.097 1.070 1.045

10 0.943 0.917 0.890

11 0.938 0.910 0.882

12 0.782 0.754 0.725

B 0.449 0.329 0.208

By leveling geometric called directly lifting is done by surveying precision and high precision. Corresponding to each level of clearance, are used for leveling floors and groom, with features that ensure the required accuracy.

Further, it shows the main geometrical surveying instruments found in practice, both technical lifts, construction, and high precision measurements, conducted for scientific purposes.

1. Description levels, construction scheme, the components parts, axes, movements

Levels are classified into two major groups: levels without sniper and sniper levels.

No sniper levels are part of simple tools that are not easily used for surveying, but to solve various problems in the card construction sites. This group includes: the rubber tube and the builder and plank.

Levels sniper makes sure orizontalizarea as targeting the telescope axis. This is done either with orizontalizare toric level, either with an optical compensator.

A. Sniper and sniper levels toric

Levels are also called classical in terms of design, are classified in two basic types: smooth riding levels without screw and screw for fine riding levels.

a) The level of fine calibration without screw

Characterized in that the support, forming a telescope firmly, with a fixed position relative to each other. It consists of the following elements: sniper, with the axis of view, for smooth toric orizontalizarea targeting the telescope axis, the axis D-D ', called directrice; ambaza that supports the entire instrument, foot screws.

To block movement telescope horizontally, the vertical axis V-V ', the device is provided with a screw or locking lever and to move is fine surb micrometers.

In this category, use of increasingly rare levels are NT, NG, NI 060 Zeisse Wild nk 01. These levels are used in technical leveling and construction execution, determining the level differences are made with a mean squared error 10 ... 20 mm / km.