A cylindrical forced centering observation pier and its embedding method

Abstract

The invention relates to a cylinder forced centering observation pillar, which comprises a cylindrical pipe adopted as a casting template, wherein a concrete chassis integrally combined with the cylindrical pipe is wrapped on the lower portion of the cylindrical pipe, the upper portion of the cylindrical pipe is positioned on the concrete chassis on the ground surface, an upper concrete column integrally combined with the cylindrical pipe is casted in the cylindrical pipe, and a forced centering scale disk is fixedly arranged on the top surface center of the upper concrete column in the cylindrical pipe. The cylinder forced centering observation pillar embedment method comprises: 1) digging a pile hole; 2) paving foundation reinforcing steel bars, and inserting four pillar vertical ribs; 3) penetrating the cylindrical pipe through the pillar vertical ribs; 4) carrying out one-time integrated casting; and 5) casting the processed forced centering scale disk so as to complete the cylinder forced centering observation pillar embedment. With the cylinder forced centering observation pillar and the cylinder forced centering observation pillar embedment method of the present invention, the construction process is simple, the sighting eccentric influence can be eliminated, and the use effect is good.

Description

technical field [0001] The invention relates to an observation pier for precision engineering measurement and an embedding method thereof, in particular to a cylinder forced centering observation pier and an embedding method thereof. Background technique [0002] At present, the high-level control network points in the field of water conservancy and hydropower construction survey in my country generally use reinforced concrete marking piers, most of which are stainless steel, and the center of the marking is forced to center, which needs to be used with connecting bolts. In the field of highway and railway construction, due to the long lines and the high cost of traditional compulsory centering pier, landmarks are often used. This brings inconvenience to the encryption and use of the control network, and also increases the instrument alignment error during the observation process. The standard pier shapes of the above-mentioned control network points mainly include square a...

AI Technical Summary

Problems solved by technology

[0003] When observing these piers, a prominent problem is often encountered, that is, the eccentricity of the aiming. Sometimes due to the poor quality of the construction of the landmarks, the center of the piers is not the center of the mandatory bids, and when the sun shines on these landmarks There are refracted shadows at different angles at different times during the pier. Even if the target plate is concentric with the pier, it is difficult to accurately center it. Therefore, it is necessary to manually erect a target plate or a sign post for accurate rear-sight orientation and direction inspection.

There are two inconveniences in fixing the target plate and sign post on the center of the mark. One is that it needs to be removed when setting up the instrument for observation. The other is that the target plate and sign post are more expensive and easy to be taken away by others. Therefore, it is necessary to send people often during operations. Check and maintain, bring trouble to use

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