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

Water delivery tunnel whole-section one-time blasting forming construction method

A technology for water conveyance tunnels and construction methods, which is applied in blasting, tunneling, earthwork drilling, etc., which can solve the problems of poor blasting effect, high cost, and low work efficiency, and achieve the effects of reducing blasting costs, reducing costs, and speeding up construction progress

Inactive Publication Date: 2018-06-19
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for Class I surrounding rocks with relatively complete rock mass (weakly weathered), hard rock, and undeveloped joints, the use of a single emulsion explosive has defects such as poor blasting effect, short footage, low work efficiency, and high cost, such as In the tunnel blasting project in Sri Lanka (mainly Class I surrounding rock), local emulsion explosives are used, and the average footage per cycle is only 0.4m, and the blast hole utilization rate is only 25%; and the cost of blasting equipment for each cycle footage needs to be 3500 , the blasting cost per meter reached 8750 yuan

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
  • Water delivery tunnel whole-section one-time blasting forming construction method
  • Water delivery tunnel whole-section one-time blasting forming construction method
  • Water delivery tunnel whole-section one-time blasting forming construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Cloth holes

[0021] Before measuring and setting out, first clear the soil and broken layer on the surface of the tunnel face, use the total station to measure and release the tunnel face, draw the contour of the tunnel face, and then determine the vertex, center point, and upper semi-circular arc on the contour of the tunnel face Left and right boundary points, bottom left and right boundary points (such as figure 1 shown), and then stake out at the control points, and use a 5m tape measure to check the size between the boundary points on site to ensure that the stake out points are accurate.

[0022] Take the center point of the face as the position of the center hole, surround the center hole, and determine the cutout eye, the first row of auxiliary eyes, the second row of auxiliary eyes, and the third row of auxiliary eyes on the face of the face from the inside to the outside. , the positions of the peripheral eye and the floor eye (the distribution is as foll...

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 discloses a water delivery tunnel whole-section one-time blasting forming construction method. The water delivery tunnel whole-section one-time blasting forming construction method comprises following steps that firstly, a blasting center hole, a breaking-in hole, an auxiliary hole, a periphery hole and a bottom plate hole are determined in the face of a tunnel, and drilling is carried out on the corresponding position; secondly, an ammonium nitrate fuel oil mixture is loaded in blast holes of the breaking-in hole and the auxiliary hole, a continuous coupling charging structure is adopted, hydrogel explosive is arranged in blast holes of the periphery hole and the bottom plate hole, and a continuous non-coupling charging structure is adopted; thirdly, explosive non-electric millisecond detonators are connected to form a blast network, and connected to the position outside the holes, and blasting excavation is achieved. The ammonium nitrate fuel oil mixture is adopted to serve as main blasting explosive, the hydrogel explosive serves as the auxiliary detonating explosive, in combination with the non-electric millisecond detonators, the blasting sequence is strictly controlled, the blasting effect and the construction proceed are improved, combination of the ammonium nitrate fuel oil mixture and the hydrogel explosive is adopted, the cost of each meter of a footageblasting device is reduced obviously, and the blasting cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of tunnel blasting, and in particular relates to a construction method for forming the whole section of a water conveyance tunnel by blasting at one time. Background technique [0002] At present, the explosives used in the construction method of tunnel blasting mainly include emulsion explosives, ammonium nitrate explosives and hydrogel, etc., especially emulsion explosives, which are the most commonly used explosives in tunnel blasting. This type of explosive is used in all However, for Class I surrounding rocks with relatively complete rock mass (weakly weathered), hard rock, and undeveloped joints, the use of a single emulsion explosive has disadvantages such as poor blasting effect, short footage, low work efficiency, and high cost, such as In the tunnel blasting project in Sri Lanka (mainly Class I surrounding rock), local emulsion explosives are used, and the average footage per cycle is only 0.4m, and the bla...

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 Applications(China)
IPC IPC(8): F42D1/00F42D1/10F42D3/04E21D9/00
CPCF42D1/00E21D9/006F42D1/10F42D3/04
Inventor 江学良赵富发杨遵俭杨慧石洪涛张继琪刘潺
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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