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The basic requirement of the construction process control survey.doc

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ThebasicrequirementoftheconstructionprocesscontrolsurveyThebasicrequirementoftheconstructionprocesscontrolsurvey

The basic requirement of the construction process control survey 1. The positioning control network construction process, can use the original area of plane and elevation control network has been established, when meet the requirements of construction measurement technology, should be used. 2. The local potential flat, buildings, structures, uncluttered and try to deploy grid architecture as a factory of plane control network, so that construction work easier. Grid architecture is the main technical requirements, from the need to satisfy the precision of the general building location, precision estimate. Its setting USES secondary net encryption scheme. The head of building grid control, can use axis method or cloth mesh method. 1 P034 3. The building field is greater than 1 square kilometers or important industrial factories, should establish equivalent to level 1 wire precision of plane control network; Construction site less than 1 square kilometers or general building area, according to the need to establish the equivalent of secondary and tertiary wire precision of plane control network. 4. The structure of the control survey, should be arranged according to design requirements, the point should be chosen in good visibility and conducive to long-term preservation. Control network encrypted indication piles, should be built in the building in line or on the direction of the center line of the main equipment. Main control network and the main equipment center line endpoint, fixed peg should be buried concrete. Level of the building elevation control points, buried separately on the signs of the plane control network of the building, near the site can also use the level of point, the spacing should be around 200 mm. When the water in the construction on time cant save, it is necessary to introduce the elevation measurement to the solid buildings or structures. Lead the precision of measurement, should not be lower than the original level of grade requirement