Underground engineering multi-span multi-layer tunnel excavation method

A technology for tunnel excavation and underground engineering, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as strong limitations, high cost, and high risks, and achieve low engineering cost, short construction period, and reduce excavation risks. Effect

Active Publication Date: 2021-09-21
CHINA RAILWAY LIUYUAN GRP CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When constructing asymmetric multi-span and large-section tunnels based on the existing traditional underground excavation method, there are problems such as strong limitations, high risks, and high costs. The multi-span and multi-span tunnel excavation method for underground engineering is to construct the vertical load-bearing system at the top of each span, and finally construct the side-span structure and the remaining structure between each span, which effectively avoids the existing large-section tunnel excavation method Construction risks during excavation

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
  • Underground engineering multi-span multi-layer tunnel excavation method
  • Underground engineering multi-span multi-layer tunnel excavation method
  • Underground engineering multi-span multi-layer tunnel excavation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1 , 3 As shown, a method for excavating multi-span and multi-storey tunnels in underground engineering comprises the following construction steps:

[0031] S1, construct super-strong support for the bottom pilot tunnel at the connection of each span, excavate the bottom pilot tunnel 1, and construct the bottom longitudinal beam foundation structure 4 in the lower pilot tunnel 1;

[0032] S2, construction of super-strong support for the top pilot tunnel at the connection of each span, excavation of the upper pilot tunnel 2 corresponding to the lower pilot tunnel 1, and construction of the top longitudinal beam structure 5 in the upper pilot tunnel 2;

[0033] Among them, the construction sequence of the lower pilot tunnel 1 and the upper pilot tunnel 2 and the excavation distance between horizontal and vertical adjacent pilot tunnels can be determined according to the characteristics of the stratum and tunnel engineering.

[0034] S3, adopting t...

Embodiment 2

[0044] Embodiment 2: as figure 2As shown, a method for excavating multi-span and multi-storey tunnels in underground engineering differs from Embodiment 1 in that, in the step S4, excavation is used to connect two upper pilot tunnels 2 between the top structural columns 3 of each span. The middle guide hole 6, the arch structure is composed of the middle guide hole 6 and the primary branches of the arch portion of the two upper guide holes 2 combined. In step S7, it is also necessary to break the initial support structure of the pilot hole 6 between the spanning structural columns 3 .

[0045] Among them, during the construction of tunnels with more than three spans by underground excavation method, the horizontal excavation distance between the middle pilot tunnel 6 where the arch roof structure between the structural columns of each span is located can be determined according to the characteristics of the stratum and engineering characteristics; Construction advance suppor...

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 an underground engineering multi-span multi-layer tunnel excavation method which comprises the following construction steps that S1, bottom layer lower pilot tunnels are excavated at connecting parts of all spans, and bottom longitudinal beam foundation structures are constructed in the lower pilot tunnels; S2, upper pilot tunnels corresponding to the lower pilot tunnels are excavated, and top longitudinal beam structures are constructed in the upper pilot tunnels; S3, structural columns for connecting the top longitudinal beam structures and the bottom longitudinal beam foundation structures between all the spans are constructed in sequence; S4, arch slab structures are constructed below arch structures between the top layer structural columns of all the spans; S5, multiple layers of side-span tunnel structures at the leftmost side structural columns and the rightmost side structural columns are excavated correspondingly; and S6, residual structures between the structural columns of all the spans are constructed. According to the excavation method, vertical force transmission structures between the spans are sequentially constructed through the small pilot tunnels, then vertical bearing systems on the tops of the spans are constructed, and finally the side-span structures and the remaining structures between the spans are constructed, so that the construction risk in the excavation process of an existing large-section tunnel underground excavation method is effectively avoided.

Description

technical field [0001] The invention relates to the field of underground engineering, in particular to a multi-span and multi-layer tunnel excavation method for underground engineering with high construction safety, short construction period and small ground subsidence. Background technique [0002] With the development needs of urban transportation, the development of underground space has been paid attention to. However, most of the development locations are located under the road. Due to the constraints of traffic guidance and other factors, underground excavation method is required for construction. Among them, when tunnels with asymmetric multi-span and multi-storey structures are constructed by underground excavation methods, for example, side piles need to be installed using the traditional hole pillar method and hole pile method, resulting in high cost and long construction period; using partial excavation Such as the side hole method and the middle hole method, alth...

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): E21D9/00E21D9/14E21D11/00E21D11/10E21D11/12
CPCE21D9/00E21D9/14E21D11/003E21D11/105E21D11/12Y02E10/20
Inventor 王齐张哲强刘亮张美琴彭柳松张金伟李晓英彭晨柳晔吕杰秦威风张磊
Owner CHINA RAILWAY LIUYUAN 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