Construction method for high-speed railway double-track tunnel penetrating through vertical mud gushing karst cave

A technology for double-track tunnels and high-speed railways. It is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., and can solve problems such as difficult construction, mud gushing in disturbed and dissolved cavities, and potential safety hazards.

Active Publication Date: 2021-11-09
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the problem of falling blocks on the top of the cave and water leakage along the cracks during rainy periods, the sand filling has limited anti-buffering capacity and is prone to water accumulation; at the bottom of the tunnel, since the outside of the cave is limestone, non-blasting excavation is very difficult, and blasting Excavation not only causes damage to the rock, but is prone to landslide hazards; it also disturbs the solution cavity to generate mud gushing, causing potential safety hazards
The construction period of the pile foundation, cap, and simply supported beam bridge is long, especially the depth of the pile foundation is too large, exceeding 70 meters, and the construction in the tunnel is very difficult, and the completed pile foundation, cap, Simply supported beams, whose settlement and convergence observation time is long, it is difficult to meet the construction schedule

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 for high-speed railway double-track tunnel penetrating through vertical mud gushing karst cave
  • Construction method for high-speed railway double-track tunnel penetrating through vertical mud gushing karst cave
  • Construction method for high-speed railway double-track tunnel penetrating through vertical mud gushing karst cave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 and figure 2 As shown, a reinforcement system for a high-speed railway double-track tunnel passing through a vertical mud gushing cave, specifically:

[0042] On the top where the main tunnel 1 passes through the karst cave, a protective arch 1-1, a concrete layer 1-2, a flexible buffer layer 1-3 and a protective layer 1-4 are sequentially built from bottom to top;

[0043] An arch bridge 4 is built at the bottom where the main tunnel 1 passes through the karst cave. The top of the arch bridge 4 is filled with a filling layer 4-1 of concrete material. Two arched door openings 4-2 are reserved on both sides of the arch bridge 4. A base plate 4-3 of reinforced concrete material is poured above the filling layer 4-1; a foundation cushion 3-1 is provided at the bottom of the foundation pit 3 below the arch bridge 4; a foundation cushion 3-1 is built between the arch bridge 4 and the foundation cushion 3-1 Bearing vertical wall 4-4.

[0044] like Figure 1...

Embodiment 2

[0050] A construction method for a high-speed railway double-track tunnel passing through a vertical mud gushing karst cave, the specific steps are as follows:

[0051] (1) Construct the protective structure on the top of the tunnel

[0052] Build the protective arch 1-1 at the top where the tunnel main hole 1 passes through the karst cave, and then fill the top of the protective arch 1-1 with plain concrete to form a concrete layer 1-2; stack sandbags on the top of the concrete layer 1-2, as Flexible buffer layer 1-3; finally, pouring reinforced concrete on top of the flexible buffer layer 1-3 to form a protective layer 1-4;

[0053] When constructing the arch protection arch 1-1, the pipe-shed method (pipe-shed method) is used for pre-support first, and then the reinforced concrete arch protection arch is constructed; specifically: φ159 steel pipe 1-11 is used for pre-support at a position 10cm outside the outline of the arch protection arch , steel pipes 1-11 with a distan...

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 for a high-speed railway double-track tunnel penetrating through a vertical mud gushing karst cave. According to a reinforcing system, through the structures of a protective arch, a concrete layer, a flexible buffer layer and a protective layer at the top of the tunnel at the karst cave, the problems that mud is not poured downwards from the top, and water is prevented can be solved, and through the structures of an anchor cable, a ring beam and a foundation cushion layer at the bottom of the tunnel, the problem that mud is not gushed upwards can be solved; and three arch bridges are erected in the middle, bearing vertical walls are additionally arranged under the arch bridges, the stability of the arch bridges is ensured, ballastless tracks are safely laid on the bridges, and the railway safely passes through the mud gushing karst cave.

Description

technical field [0001] The invention relates to the technical field of tunnel subsidence construction, in particular to a construction method when a high-speed railway double-track tunnel passes through a vertical mud gushing karst cave. Background technique [0002] Tunnels often pass through karst geology when they are built. Since karst morphological features mainly include karst ditches, underground rivers, and karst caves, when building tunnels, it is easy to cause ground subsidence and surface subsidence caused by water gushing or mud inrush, such as tunnel holes. Surface subsidence often occurs at the top to form potholes. The traditional method is to clean up all the gushing fillings, build arch protection at the arch, fill with thick river sand, and use it as a buffer layer; dissolve the cavity at the bottom of the tunnel Bored piles are constructed, abutments are laid, cast-in-place prefabricated simply supported beams are constructed, and ballastless tracks are co...

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): E21D11/10E21D11/08E21D11/38E21D21/00E21F16/02
CPCE21D11/105E21D11/08E21D11/38E21D21/0026E21F16/02E21D11/04E21D9/14E21D9/001
Inventor 张馨赵志涛席居法张湘平贾宝新刘家顺
Owner CHINA RAILWAY 18TH BUREAU GRP 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