建筑工程重点（Key points of construction engineering）.docVIP

建筑工程重点（Key points of construction engineering） Knowledge point 1: Construction survey main work and method Construction survey main work 1. Measurement of known length 2. Measurement of known angles 3. Measurement of the plane location of the building details 4. Measurement of elevation position and inclination line of building details Construction survey method: 1. Distance measurement: the accuracy requirement can be divided into ordinary amount and precision distance. 2. Measurement of Angle: using theodolite 3. Measurement of the plane position of the detail point of the building: the method can be realized by right-angle coordinate method, polar coordinate method, forward intersection method and distance intersection method 4. Measurement of building elevation: it can be measured directly by means of water level or steel ruler Problem analysis It is most convenient to use (A) to measure the plane position of the building detail when the construction control network is grid or axis. A. Rectangular coordinates B. polar coordinates C. Forward intersection method D. Distance intersection method Typical type: The elevation of A point is 36.05 m, and the point of point A is the rear view point, the point B is the front view point, the level measurement is 1.12 m, the rear view reading is 1.22m, and the elevation of B is () m.  35.15 A  35.95 B  36.15 C D  36.95 Answer: C A point elevation = A point elevation = A point elevation + rear view reading = 36.05 + 1.22-1.12 = 36.15. Knowledge point two: The function and use of construction measuring instrument transit 1. Composition: normal, horizontal disk and base 2. Function: the main function is to measure the horizontal Angle between the two directions; Secondly, it can also measure the vertical Angle; Using a leveling ruler, it also measures the horizontal and high difference between two points. level Composition: consists of three parts: the telescope, the level and the base 2. Function: the main function is to m