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A positioning device for water height addition of bridge steel cofferdams and a positioning method thereof

A positioning device and positioning method technology, applied in measuring devices, instruments, surveying and mapping and navigation, etc., can solve problems such as construction difficulties, and achieve the effects of great promotion value, convenient manufacture, and low cost

Active Publication Date: 2009-03-04
THE 2ND ENG CO LTD MBEC
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  • Application Information

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Problems solved by technology

[0002] In bridge construction, if the steel cofferdam needs to be raised while floating on the water, the positioning speed and accuracy of the raised height are important factors for the construction progress and quality. The method of measurement, this method has certain requirements on weather factors such as wind force and operating platform, which brings certain difficulties to the construction.

Method used

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  • A positioning device for water height addition of bridge steel cofferdams and a positioning method thereof
  • A positioning device for water height addition of bridge steel cofferdams and a positioning method thereof
  • A positioning device for water height addition of bridge steel cofferdams and a positioning method thereof

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Embodiment Construction

[0013] Control attached figure 1 , Set the reference point 1 and the laser point-pointing instrument 3 on the original steel cofferdam (or other structures); set the alignment point 2 on the parts that need to be connected.

[0014] Control attached figure 2 , 3 , the reference point 1 is composed of upper and lower base plates 4, the upper base plate is used to locate the direction, the laser spotting instrument 3 is placed under the lower base plate, and the two base plates 4 are connected with the original steel cofferdam B and fixed by a stiffening plate. The substrate 4 is made of 40×40cm steel plate with a thickness of 8mm, and a φ5cm hole is opened in the center, and a 1mm thick iron plate 5 is placed on it, with a size of φ10cm. A φ1mm alignment hole 6 is opened at the center of the thin iron plate 5, which is convenient for positioning and measuring positioning through the laser. It is welded and fixed with the thin iron plate 5 and the base plate 4 afterward.

[...

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Abstract

The inventions are positioning device and method to heighten bridge steel cofferdam on water. The device is composed of reference point, para point and laser casting point apparatus. The reference point contains upper and lower base plates. The upper base plate is used to fix direction and the lower sets laser casting point apparatus below. Both of them are connected with initial steel cofferdam and fixed by stiffening plate. The steps of positioning method: locate upper and lower plates of reference point on top of steel cofferdam. Reckon relative coordinate of the para point in center of para pole. Template positioning thin iron plate is fixed with the two base plates. Locate para point corresponding to the reference point. Steps of glass plate positioning are same as locating reference. In order to heighten the steel cofferdam, set laser casting point apparatus and equip block heightening steel cofferdam to get exact position based on superposition of para point and laser. It has merits of simple structure, convenient production, low cost and can resolve the difficulty to heighten steel cofferdam under float condition of water in bridge construction.

Description

technical field [0001] The present invention relates to a bridge steel cofferdam water height positioning device and its positioning method, which is suitable for bridge construction, if the steel cofferdam (or other structures) needs to be raised under dynamic conditions such as floating on water , using the principle of laser projection to guide positioning and monitor shape and position. It belongs to the technical field of bridge construction. Background technique [0002] In bridge construction, if the steel cofferdam needs to be raised while floating on the water, the positioning speed and accuracy of the raised height are important factors for the construction progress and quality. The method of measurement, this method has certain requirements on weather factors such as wind force and operating platform, which brings certain difficulties to the construction. Contents of the invention [0003] The object of the present invention is to address the above-mentioned e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/04G01C15/00
Inventor 罗瑞华于祥君季跃华农代培钱登齐王建华邱琼海何正诚刘学明刘晓霞
Owner THE 2ND ENG CO LTD MBEC
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