3 results about "Level line" patented technology

SUMMARY OF THE INVENTION An object of the present invention is to provide a surveying aid that enables a level line to be stretched accurately and easily at a predetermined location and that enables dimensions from the level line to be measured accurately and easily. [Solution] The surveying auxiliary tool 100 is installed on a structure (for example, a water stake 71) installed on the ground, and is capable of tensioning a water line 91. The surveying auxiliary tool 100 comprises a clamper 1 that clamps the structure (for example, a water stake 71), a support plate 2 that is rotatably installed relative to the clamper 1 and is placed on the structure (for example, a water stake 71), and a slider 3 that engages with a slit guide 21 formed on the support plate 2 and is installed so as to be movable along the slit guide 21. A weight 5 can be hung from the slider 3, and a water line 91 can be hooked onto the slider 3.

The utility model relates to building tool technical field especially relates to a kind of masonry horizontal positioner, including level line, the level line is installed on positioner body, the central block card slot is opened in the lower surface of positioner body, the length of block card slot is same with block width, block card slot and block gap cooperation, the annular groove for fixing level line is opened in the two ends of positioner body around outer wall respectively. Compared with traditional method, the utility model has high precision, can not be prone to displacement after being installed on the upper surface and outer edge of block simultaneously, and has high stability. In addition, the utility model has simple structure, can be repeatedly used, and has low use cost.

The invention relates to the technical field of closure-free construction, in particular to a dam construction method without closure construction, which comprises the following steps: acquiring an intersection point of a river channel water level line and a riverbed section line, identifying a span section by combining a track center line and a truss node coordinate, carrying out track alignment correction, and according to the matching of a drill hole number and a track mileage point, determining the closure-free construction of a dam. And the construction sequence is judged according to the rock stratum elevation and the drilling state. According to the method, the intersection relation between a river water level line and a river bed section line is extracted and connected to form a water passing boundary line, a water passing gallery range is delimited, a construction area is spatially separated, and span sections are screened by combining a track center line, truss node coordinates and a bearing value; the arrangement process of the river-crossing structure is matched with the riverbed form and the structure stress state, the track is controlled to be consistent with the dam axis by combining track center line countershaft judgment and position correction, and the conditions of arrangement deviation and drilling position dislocation of the river-crossing structure are reduced according to matching of the drilling number and the track mileage point.