Construction method adopting grouting to stop water in bare rock of underground cavern

A technology for underground caverns and bare rock, which is applied in underground caverns, earthwork drilling, wellbore lining, etc., and can solve problems such as increasing safety risks in underground cavern construction, restricting cavern construction progress, and affecting the quality of bolting and spraying support. , to achieve the effect of increasing the combination, reducing the use of materials, and saving construction costs

Active Publication Date: 2016-12-21
SINOHYDRO BUREAU 14 CO LTD
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the construction of underground engineering, the excavation of underground caverns generally requires a shotcrete support. During the period of anchor shotcrete support, water seepage in the surrounding rocks of the caverns is often encountered, especially in water-rich areas, where water seepage in the surrounding rocks of underground caverns seriously affects The quality of anchor shotcrete support restricts the progress of cavern construction and increases the safety risk of underground cavern construction
At present, in domestic underground cavern surrounding rock bare rock sections, systemic consolidation grouting is often used after the completion of bolt and shotcrete support, or consolidation grouting after secondary concrete lining construction in seepage sections. Consolidation grouting is for the purpose of consolidating the surrounding rock. After the consolidation grouting construction is completed, although it can reduce the water seepage of the cavern, it cannot achieve the purpose of preventing the water seepage of the underground cavern, especially it is more difficult to grout and stop water in the bare rock of the cavern

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 adopting grouting to stop water in bare rock of underground cavern
  • Construction method adopting grouting to stop water in bare rock of underground cavern
  • Construction method adopting grouting to stop water in bare rock of underground cavern

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A construction method of grouting and water-stopping in the bare rock of an underground cavern includes the following steps:

[0035] Step (1): Determine the grouting range for the seepage area of ​​the underground cavern: After the surrounding rock of the underground cavern is excavated, check the seepage area, and take the area beyond 6.0m around the seepage area as the grouting range;

[0036] Step (2), determination of grouting hole parameters in the grouting range of underground caverns: arranging grouting holes within the grouting range, grouting hole diameter 40mm, grouting hole spacing 0.4-0.6m, grouting hole depth 6.0mm, and grouting hole density in the seepage area Greater than the density of the grouting holes around the seepage area;

[0037] Step (3), pre-embedded seepage drainage pipe and grout return pipe: the drainage pipe is 40cm long, the drainage pipe is equipped with a drainage pipe gate valve, the lower part of the drainage pipe penetrates into the groutin...

Embodiment 2

[0046] A construction method of grouting and water-stopping in the bare rock of an underground cavern includes the following steps:

[0047] Step (1) Determine the grouting range of the seepage area of ​​the underground cavern: After the surrounding rock of the underground cavern is excavated, check the seepage area, and take the range beyond 9.0m around the seepage area as the grouting range;

[0048] Step (2), determination of grouting hole parameters in the grouting range of underground caverns: arranging grouting holes within the grouting range, the grouting hole diameter is 90mm, the grouting hole spacing is 0.8-1.0m, the grouting hole depth is 6.0m~12.0m, and the seepage area is grouted. The density of the holes is greater than the density of the grouting holes around the water seepage area;

[0049] Step (3), pre-embedded seepage drainage pipe and grout return pipe: the drainage pipe is 60cm long, the drainage pipe is equipped with a drainage pipe gate valve, the lower part of...

Embodiment 3

[0060] A construction method of grouting and water-stopping in the bare rock of an underground cavern includes the following steps:

[0061] Step (1): Determine the grouting range of the seepage area of ​​the underground cavern: After the surrounding rock of the underground cavern is excavated, check the seepage area, and take the area beyond 7.0m around the seepage area as the grouting range;

[0062] Step (2), determination of grouting hole parameters for the grouting range of underground caverns: arranging grouting holes within the grouting range, the grouting hole diameter is 70mm, the grouting hole spacing is 0.6~0.8m, the grouting hole depth is 6.0m~12.0m, and the seepage area is grouted. The density of the holes is greater than the density of the grouting holes around the water seepage area;

[0063] Step (3), pre-embedded seepage drainage pipe and grout return pipe: the drainage pipe is 50cm long, the drainage pipe is equipped with a drainage pipe gate valve, the lower part o...

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 construction method adopting grouting to stop water in bare rock of an underground cavern and belongs to the technical field of civil construction. The construction method comprises six steps of determining a grouting range for a water seepage area of the underground cavern; determining parameters of grouting holes in the grouting range of the underground cavern; pre-burying a water seepage drainage pipe and a return pipe; spraying concrete in the grouting range; performing grouting in the grouting range with a method; ending grouting according to a standard. According to the construction method adopting grouting to stop water in the bare rock of the underground cavern, construction of the grouting holes and pre-burying of the drainage pipe before spraying of the concrete are sufficiently used, slide waste of the sprayed concrete material is reduced, combination of the sprayed concrete material with rock surface is increased, grouting is performed after concrete spraying according to the grouting ideas of grouting outer-ring holes firstly and then grouting inner-ring holes, grouting seepage-free holes firstly, then grouting small-seepage holes and finally grouting large-seepage holes, water seepage in the cavern is prevented effectively, repeated grouting to stop water is avoided, time is saved, and the construction progress is accelerated.

Description

Technical field [0001] The invention belongs to the technical field of civil construction, and in particular relates to a construction method for grouting and stopping water in the bare rock of an underground cavern. Background technique [0002] In the construction of underground engineering, the excavation of underground caverns generally requires a shotcrete bolt support. During the period of bolt shotcrete support, water seepage is often encountered in the surrounding rock of the cavern, especially in water-rich areas. The quality of bolting and shotcreting support restricts the construction progress of the cavern and increases the safety risk of underground cavern construction. At present, the surrounding rock and bare rock sections of domestic underground caverns often adopt system consolidation grouting after anchoring and shotcreting support is completed, or consolidation grouting after the construction of secondary concrete lining in seepage sections. The purpose of cons...

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): E21D11/38E21D11/10
CPCE21D11/105E21D11/38
Inventor 吴波郭钊王合君李福邱东明王鹤
Owner SINOHYDRO BUREAU 14 CO LTD
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