Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Construction method of blasting excavation for large-diameter pipeline in rock cavern wall

A large-diameter pipeline and construction method technology, which is applied to the construction field of large-diameter pipeline blasting and excavation, can solve the problems of difficult blasting quality control, difficult pipe grooves, loose surrounding rock, etc., so as to reduce the number of blasting cycles, shorten the construction period, The effect of reducing project cost

Active Publication Date: 2017-09-01
ZHEJIANG PROVINCIAL NO 1 WATER CONSERVANCY & ELECTRIC POWER CONSTR GRP HLDG
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the excavation of the tunnel, due to the redistribution of stress in the surrounding rock, the exposure of joints and fissures, the loosening of the surrounding rock caused by blasting vibration, etc., it is very difficult to excavate the pipe groove by blasting on the wall of the tunnel. There is even a safety hazard of roof fall, and it is difficult to control the blasting quality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Construction method of blasting excavation for large-diameter pipeline in rock cavern wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings, but it should not be understood that the scope of the above-mentioned theme of the present invention is limited to the above-mentioned embodiments.

[0031] like figure 1 As shown, a construction method for blasting and excavating a large-diameter pipeline in a rock cavern wall includes the following steps:

[0032] (1) Measurement and setting out: measure the upper and lower contour lines of the pipe groove and the positions of the peripheral holes and cut holes along the axis of the hole. The peripheral holes are located on the contour line, and the cut holes are located in the middle of the upper and lower rows of peripheral holes. None greater than ± 5cm.

[0033] (2) Arrangement of wind and electricity pipelines: Arranged on the wall of the cave opposite the pipe groove not affected by excavation, the height shall not be less than 1.8m, in order to reduce...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a pipeline construction method, in particular to a construction method for large-caliber pipeline blasting excavation. In order to solve the deficiencies in the prior art, the invention provides a safe and adaptable construction method for blasting and excavating large-diameter pipelines in rock cave walls. A construction method for blasting and excavating a large-diameter pipeline in a rock cavern wall of the present invention includes the steps of measuring and setting out, connecting a wind power pipeline to a working surface, drilling, charging and detonating, slag removal, trimming, and cleaning. Compared with the vertical drilling and blasting excavation technology used in general tunnels, the long section of each cycle footage is only 2 to 4 meters long (I to III types of surrounding rock), the horizontal drilling and blasting excavation method can excavate 20 meters at a time, and the work Efficiency is greatly improved.

Description

technical field [0001] The invention relates to a pipeline construction method, in particular to a construction method for large-caliber pipeline blasting excavation. Background technique [0002] Excavating pipe grooves in the formed rock cave wall to bury large-diameter pipes currently lacks relevant design and construction specifications, and there are few application examples. The process is novel, risky, and difficult. After the excavation of the tunnel, due to the redistribution of stress in the surrounding rock, the exposure of joints and fissures, the loosening of the surrounding rock caused by blasting vibration, etc., it is very difficult to excavate the pipe groove by blasting on the wall of the tunnel. There is even a safety hazard of roof fall, and the blasting quality is also difficult to control. If conventional tunnel excavation technology is used for construction, drilling and blasting along the axis of the tunnel longitudinally, because one side is the fre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00
Inventor 何国玮丁信刚吴丽燕汪红君刘峰浩
Owner ZHEJIANG PROVINCIAL NO 1 WATER CONSERVANCY & ELECTRIC POWER CONSTR GRP HLDG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com