Method for linear directional measurement by utilizing laser in pipe jacking engineering

Abstract

The invention discloses a method for linear directional measurement by utilizing laser in pipe jacking engineering. The method is characterized by comprising the following steps of plane control point layout, guide point layout on a vertical shaft guard wall, vertical shaft coordinate transmitting, elevation base line layout, guide rail arrangement and detection. The method has the benefits that conventional laser beam single-point orientation is changed into laser cross plane orientation, guide reference is uninterruptedly provided for pipe jacking construction, the deviation of the center of a jacking pipeline from the design axis can be timely discovered, and the construction precision is improved; the method is simple and easy to learn, the measuring speed is high, complicated measurements are reduced, the problem of difficulty in repeated measurement in the directional measurement process of conventional jacking pipes is eliminated, and surveyors are liberated from severe measurement environments; the measurement accuracy is high; a geoplane not only can accurately and rapidly measure whether a machine head is lifted or lowered, but also can set a flow slope, so as to perform sloping rapid induction measurement on the jacking pipe.

Description

technical field [0001] The invention relates to a linear directional measurement method, in particular to a linear directional measurement method using a laser in a pipe jacking project, and belongs to the technical field of building construction. Background technique [0002] The pipeline laying in the rainwater and sewage engineering of municipal engineering generally adopts full-section excavation construction. With the acceleration of urbanization, the laying of sewage pipelines is getting deeper and deeper, and the excavation construction is getting deeper and deeper as the buried depth of pipelines deepens Uneconomical. In addition, urban infrastructure is very crowded and complicated, and drainage pipelines often cross existing roads, railways and other transportation facilities, and excavation construction is often severely restricted. Under the constraints of these conditions, both the design unit and the construction unit are looking for a convenient new technolog...

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Problems solved by technology

[0004] 1. In terms of short-distance pipe jacking construction, the main content of the measurement work is the inspection and measurement during the jacking process. During normal jacking, it is measured every 60-80cm. When the measurement error is large, it is necessary to measure every 30-40cm. Observation once, so the work intensity is high and the efficiency is low, which greatly restricts the construction progress of the project

[0005] 2. The orientation method of underground construction has low precision, bulky instruments, and cumbersome procedures; the method of orientation measurement is low in efficiency and high in strength, while the construction path of urban underground pipe jacking projects is getting longer and longer, the accuracy requirements are getting higher and higher, and the route is getting more and more difficult. Complex, traditional measurement methods and instruments can no longer adapt to the characteristics of modern underground engineering

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