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Trackless measurement construction method for inner ring network of subway tunnel

A construction method and technology in the tunnel, which are applied in the directions of measuring device, height/level measurement, surveying and mapping, and navigation, etc., can solve problems such as the tight construction period of subway power supply, and achieve the effect of advancing the entry time, ensuring accuracy and avoiding rework.

Active Publication Date: 2019-10-25
CHINA RAILWAY 12TH BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction period of the subway power supply is generally relatively tight. Under normal circumstances, the survey construction based on the laid and adjusted steel rails or connecting passages in the tunnel often cannot meet the requirements of the construction period.

Method used

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  • Trackless measurement construction method for inner ring network of subway tunnel
  • Trackless measurement construction method for inner ring network of subway tunnel
  • Trackless measurement construction method for inner ring network of subway tunnel

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a trackless measurement construction method for a ring network in a subway tunnel, which includes the following steps.

[0047] Step 1. Determine the starting mileage and calculate the coordinates of the starting point

[0048] Take the preset distance N1 inward of the tunnel entrance as the starting point, and the mileage obtained by adding the preset distance N1 to the tunnel entrance mileage is the starting measurement mileage.

[0049] When measuring the ring network of the tunnel, considering the convenience of construction, generally select the position 5 meters inward of the opening (that is, N1=5 meters) to start the measurement, and add 5 meters to the mileage of the tunnel opening to get the starting mileage. Combined with the horizontal and vertical section diagram of the line, the starting point of the tunnel entrance is the structural boundary point, and the coordinates of the structural boundary point, as well as the coordinates of...

Embodiment 2

[0080] In the power supply system and comprehensive monitoring system equipment installation project of the first phase of the Beijing Rail Transit New Airport Line, a trackless measurement construction method for the inner ring network of the subway tunnel described in Example 1 was adopted, taking into account both measurement accuracy and efficiency. After practice , achieved good results.

[0081] In terms of economic benefits: first, when there is less cross-interference, the construction efficiency is greatly improved, and the construction efficiency is greatly improved, and the same number of people can complete more projects, which saves construction costs; Coordination expenses, and possible layoff costs.

[0082] Compared with the previous survey construction, after the design rail surface position and slope distance are given, it becomes very simple to determine the installation height of the ring network support. A group of three can quickly and accurately complete...

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Abstract

The invention, which belongs to the technical field of subway construction, provides a trackless measurement construction method for an inner ring network of a subway tunnel. The method comprises: step one, determining a starting mileage and calculating a coordinate of a starting point; step two, calculating a measuring starting point and a designed track surface elevation of one corresponding point position at an interval with a preset distance N2; step three, locating and marking the designed track surface elevation position based on the measuring starting point; step four, with the measuring starting point as a starting point, measuring and marking a designed track surface elevation of one corresponding point position at an interval with the preset distance N2; step five, measuring a slope distance in a shield tunnel by using a total station and taking an average value; step six, determining a mounting height position of a ring network bracket; and step seven, carrying out spot checking and rechecking in the measuring process. With the trackless measurement construction method, the entrance time is advanced substantially; the mounting height measurement and construction of the bracket are performed before track laying construction, so that the working period pressure is reduced in the follow-up procedure, the intersected construction interference is reduced and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of subway construction, and specifically discloses a trackless measurement construction method for an inner ring network of a subway tunnel. Background technique [0002] In the subway power supply construction, the ring network is the basis for the normal operation of the subway and occupies a very important position in the power supply network. As the installation of the ring network support is an important process of the ring network professional, the measurement of the installation height of the support is the premise of the support installation and the key to the precision control. The outer support of the tunnel is generally installed on the column of the evacuation platform, and there are reserved holes, which do not involve the measurement of the installation height. The construction period of the subway power supply is generally relatively tight. Under normal circumstances, the survey construction ...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 王铭韩悌斌缪嘉杰辛东红梁卫兵张杰刘金录赵立峰
Owner CHINA RAILWAY 12TH BUREAU GRP
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