Chemical dissolution and cleaning dredging method for crystallization blockage of karst tunnel drainage system

A tunnel drainage and chemical dissolution technology, which is applied to chemical instruments and methods, cleaning methods and appliances, drainage, etc., can solve the problems of early prevention and treatment of diseases that have not been carried out, and achieve the effect of simple and effective construction methods and strong operability

Active Publication Date: 2018-08-17
NANJING UNIV OF TECH +2
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above studies involved the research on the tunnel drainage system blocked by karst crystals, and the corresponding treatment methods are all remedial methods after the tunnel structure is seriously damaged, and early prevention and tre

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The technical scheme of the present invention is described in detail below by way of example:

[0022] 1. The construction method of chemical dissolution and cleaning and dredging of karst tunnel drainage system crystallization blockage, including the following steps:

[0023] The first step: Electromagnetic detection of blockage points. Based on the investigation and acquisition of the crystallization blockage area of ​​the karst tunnel drainage system, 1000MHz high-frequency geological radar is used to detect and obtain the precise crystallization blockage point positions in the PVC plastic drainage board on the back of the tunnel lining structure and the blind ditch pipe and blockage length;

[0024] Step 2: Dissolving and cleaning the pipe layout, starting from the positions at both ends of the blocking point moving 10mm inward toward the center of the blocking point. In this interval, drill holes with a diameter of 25mm at intervals of 30 to 40cm, and the depth of ...

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 chemical dissolution and cleaning dredging method for crystallization blockage of a karst tunnel drainage system. The problems that blockage of the drainage system by karstcrystallization universally exists in tunnel engineering in karst areas, and a serious threat to safety and long-term operation of a tunnel engineering structure is brought are solved. According to the chemical dissolution and cleaning dredging method for crystallization blockage of the karst tunnel drainage system, a polymer carboxylic acid type organic acid reagent with the concentration of 2000-2200 ppm and the dichromate index of 17.71-20% is adopted as a dissolution and cleaning solvent. The chemical dissolution and cleaning dredging method comprises the construction steps of electromagnetic detection of blockage points, arrangement of dissolution and cleaning pipelines, a chemical dissolution phase, auxiliary dredging measures, a cycle cleaning stage, and blockage of dissolution andcleaning pipeline holes. The dissolution and cleaning solvent is environmentally friendly, does not react with cement-based and PVC plastic materials, and can effectively clear karst crystal substances of the drainage system. The construction method can effectively solve the problem of blockage of the drainage system by karst crystallization universally existing in tunnel engineering in the karstareas.

Description

technical field [0001] The invention relates to a method for chemically dissolving, cleaning and dredging crystal blockage in a karst tunnel drainage system. The invention belongs to the technical field of tunnel engineering disease treatment. It is suitable for operation and maintenance of karst tunnel engineering, especially in karst developed areas. Background technique [0002] The area of ​​karst-developed areas in my country is close to 1 / 3 of the country's land area, and the disease problem of karst tunnels is particularly serious. The hazards of karst tunnels mainly come from two aspects: one is the adverse effect of karst development on the long-term stability of the tunnel structure caused by geological structure and rock quality cracking; the other is the erosion effect of karst water on the tunnel lining structure and drainage system. Among them, a prominent problem caused by the latter is that the karst groundwater entrains rock debris to precipitate and cryst...

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
IPC IPC(8): E21F16/02B08B9/032B08B9/027
CPCB08B9/027B08B9/032E21F16/02
Inventor 张鹏洪英维李俊辉杨恒卫牛国良
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap