Title:
GROUTING PIPE AND METHOD OF REINFORCING TUNNEL BY SURFACE GROUTING
Document Type and Number:
WIPO Patent Application WO/2021/139063
Kind Code:
A1
Abstract:
A grouting pipe and a method of reinforcing a tunnel (5) by surface grouting. The grouting pipe comprises a first sleeve valve pipe (1), a second sleeve valve pipe (2) and a third sleeve valve pipe (4). The sleeve valve pipes are connected in a sleeved manner and perform grouting by means of grout holes (3) on the sleeve valve pipes. The method comprises steps: 1. sampling and testing soil in a tunnel (5) and determining soil parameters; 2. performing surveying and leveling of a construction site; 3. drilling and preparing an outer cover material (7); and 4. performing grouting section by section by means of the grout holes. The method performs surface grouting to reinforce the tunnel (5) by means of a surface-constructed grouting pipe and is applicable to extremely deep tunnels (5) as well as tunnels (5) of normal depth, and is also applicable to various geological structures.
Inventors:
CHEN ZHAOYU (CN)
HE KAIWEI (CN)
XIE CAIBIN (CN)
ZHOU WEN (CN)
WANG JUN (CN)
HE KAIWEI (CN)
XIE CAIBIN (CN)
ZHOU WEN (CN)
WANG JUN (CN)
Application Number:
PCT/CN2020/090408
Publication Date:
July 15, 2021
Filing Date:
May 15, 2020
Export Citation:
Assignee:
CHINA RAILWAY NO 2 ENG GROUP CO LTD (CN)
CHINA RAILWAY ERJU 4TH ENG CO LTD (CN)
CHINA RAILWAY ERJU 4TH ENG CO LTD (CN)
International Classes:
E21D9/00
Foreign References:
| CN111140238A | 2020-05-12 | |||
| CN205677636U | 2016-11-09 | |||
| CN207597388U | 2018-07-10 | |||
| CN110630273A | 2019-12-31 | |||
| CN204112308U | 2015-01-21 | |||
| CN109630155A | 2019-04-16 | |||
| JP2000145398A | 2000-05-26 |
Attorney, Agent or Firm:
SICHUAN LIJIU LAW FIRM (CN)
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