How to give TOC level during concreting , elevation method by total station sokkia скачать в хорошем качестве

How to give TOC level during concreting , elevation method by total station sokkia

 To give elevation with a total station, you set it up, input a known starting elevation (Benchmark), take a backsight to that point to find your instrument height (HI), and then shoot your foresight points, using the formula: Point Elevation = HI + (V-Reading) - (Rod Height) or Point Elevation = Elevation of Known Point + HI - Rod Height to get elevations of new spots, even on buildings, by measuring vertical angles and distances.  Key Steps & Concepts: Setup & Leveling: Place the tripod over your known point (Benchmark/BM) and level the instrument using the electronic level on the controller until the readings are near zero (or within acceptable tolerance). Ensure the instrument is precisely centered over the point using the optical or laser plummet. Input Known Data: Enter the known elevation of your starting point (BM) into the total station's controller. Take a Backsight (BS): Sight a prism or reflective surface on your known point (BM). Measure the Rod Height (RH), which is the distance from the ground to the center of the prism. The total station calculates the Instrument Height (HI) using the BM elevation, the vertical angle, and the slope distance (L) to the prism, or directly by measuring the vertical difference. Formula: HI = (Elevation of BM) + (Rod Height) - (Vertical Distance to Prism). Take Foresights (FS) / Shots: Turn the instrument to your new point (e.g., the top of a wall, a new stake). Measure the vertical angle (or vertical distance) and slope distance to that point. The instrument uses its internal software (like the Pythagorean theorem) to calculate the elevation of the new point. Formula: Elevation of New Point = HI + (V-Reading) - (Rod Height) or Elevation of New Point = (Known Elevation) + HI - (Rod Height). For Building Heights (Without BM): Set up, measure the instrument height (HI) above your base point. Shoot the base of the wall (Rod Height 0). Shoot the top of the wall (Rod Height X). The software calculates the height difference (e.g., Top Elevation = HI + Vertical Angle Component - Rod Height at Top).  Key Measurements: Benchmark (BM): A point with a known elevation (Height/Elevation). Instrument Height (HI): Height from the ground to the center of the telescope axis (or prism center for some functions). Rod Height (RH): Height from the ground to the center of the prism/target. Vertical Angle (V): Angle from the horizontal to the line of sight. Slope Distance (L): Distance from the instrument to the prism (hypotenuse).