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A Precise Construction Lofting Method for Cantilever Bridge Construction

A cantilever, precise technology, applied in the direction of measuring devices, instruments, surveying and navigation, etc., can solve problems such as errors and engineering influences, and achieve the effect of ensuring accuracy, solving accuracy problems, and expanding suitable time

Inactive Publication Date: 2016-03-16
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] In order to solve the technical problem that the current cantilever beam bridge construction is prone to error and cause the project to be affected, the invention provides an accurate construction lofting method for the cantilever beam bridge construction

Method used

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  • A Precise Construction Lofting Method for Cantilever Bridge Construction

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Embodiment Construction

[0016] see figure 1 , the present invention comprises the following steps:

[0017] Step 1: Set up a total station on the obligatory centering observation pier near the construction site of the cantilever beam bridge for observation, and stake out two control points for the precise construction and lofting of the cantilever beam bridge. The two control points are the cantilever beam bridge The extension line of the axis is at the stable geological section of the bridge head in two opposite directions of the cantilever beam bridge and can observe each other;

[0018] Step 2: Set the pre-stakeout point as the midpoint a of the length of the cantilever beam section along the bridge axis. Let one of the control points be A and the other control point be B. In theory, the three points A, a, and B are collinear. Set up a total station at control point A, aim at control point B on the left side of the face to determine the first line of sight direction, and then in the first line of...

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Abstract

The invention discloses a precise construction sampling method for cantilever bridge construction. According to the method, two control points for precise construction sampling of the cantilever bridge construction are sampled in an observation stabilization stage by centering an observation pier forcibly; then, a sampling point is precisely determined by erecting total stations at the two control points for observing each other. The construction sampling of the cantilever bridge construction is performed by the utilizing the method, the sampling stability of the cantilever bridge construction can be guaranteed, and the sampling precision of the cantilever bridge construction can also be improved.

Description

technical field [0001] The invention relates to an accurate construction lofting method for the construction of a cantilever beam bridge. Background technique [0002] For tall cantilever beam bridges, the accuracy of construction lofting is a key factor that determines the quality and success of construction. The accuracy of construction stakeout mainly involves plane positioning and elevation positioning. The accuracy of plane positioning is the most important thing in the quality control of construction lofting. At present, the construction of highways in mountainous areas has been carried out in a large area, and there are more and more tall bridges, especially bridges with high piers. Cantilever girder bridges or T-shaped steel girder bridges are widely used in mountainous areas, and the higher the pier height, the higher the quality of the foundation, pier body, and cantilever sections. It often occurs that due to the large error of construction lofting or even erro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 唐利民郑健龙
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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