Construction method of up-down crossed tunnel

A construction method and tunnel technology, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as cross-tunnel mutual interference, and achieve the effects of improving construction safety and solving safety and technical problems

Active Publication Date: 2021-02-19
GUANGZHOU ENG CO LTD OF CHINA RAILWAY 19TH BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology allows for division of tunneling into smaller areas with separate supports made up of materials like concrete or steel reinforced plates. It also monitors how well these supporting structures are being driven during excavation operations while controllably releasing fresh material around them when needed. By doing this, they ensure proper functioning of nearby tunnelling walls without any issues caused by overexcitation or other factors affecting their performance. Overall, this innovative solution improves overall efficiency and security measures against explosions threatening both inside and outside buildings' surroundings.

Problems solved by technology

This patented describes how we have developed an improved way to construct long distance tunneling systems with multiple intersecting passages without affecting their own strength or integrity.

Method used

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  • Construction method of up-down crossed tunnel
  • Construction method of up-down crossed tunnel
  • Construction method of up-down crossed tunnel

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Embodiment Construction

[0027]Seefigure 1 ,figure 1 It is a schematic diagram of the upper and lower crossing tunnel in the embodiment of the construction method of the upper and lower crossing tunnel of the present invention. This embodiment is an embodiment of a construction method in which the tunnel 2 to be constructed underpasses the existing tunnel 1. The tunnel 2 to be constructed is a highway tunnel, and the existing tunnel 1 is a high-speed railway tunnel. In the vertical projection, the existing tunnel 1 and the tunnel 2 to be built have an intersection 120, and the angle between the extending direction of the existing tunnel 1 and the extending direction of the tunnel 2 to be built is 60 degrees.

[0028]First of all, it is planned to carry out the construction of tunnel 2 to be constructed by the drilling and blasting method. Considering that the existing tunnel 1 has been in operation for many years, the lining strength has decreased. At the same time, the vertical distance between the existing tunn

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Abstract

The invention provides a construction method of an up-down crossed tunnel. The construction method comprises the steps that a blasting distance data set and a blasting dosage data set are calculated according to obtained surrounding rock parameter data, preset blasting parameter data and preset blasting vibration speed control data based on a Sadov's formula; a crossed influence section of a tunnel to be built is divided into a strong disturbance area and a weak disturbance area according to the blasting distance data set; the strong disturbance area is excavated, and a primary supporting structure is built in the strong disturbance area; and the strong disturbance area and the weak disturbance area are sequentially subjected to subsection blasting according to obtained vibration monitoring data, the blasting distance data set and the blasting dosage data set, and the vibration monitoring data are obtained through a vibration monitor arranged in an existing tunnel. According to the construction method, the safety problem and the technical problem of mutual interference of adjacent tunnels are solved.

Description

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Claims

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Application Information

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Owner GUANGZHOU ENG CO LTD OF CHINA RAILWAY 19TH BUREAU GRP
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