EP2511472A1 - Method for making tunnels or perforations in civil engineering works using sacrificial tunnels - Google Patents

Method for making tunnels or perforations in civil engineering works using sacrificial tunnels Download PDF

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Publication number
EP2511472A1
EP2511472A1 EP10835511A EP10835511A EP2511472A1 EP 2511472 A1 EP2511472 A1 EP 2511472A1 EP 10835511 A EP10835511 A EP 10835511A EP 10835511 A EP10835511 A EP 10835511A EP 2511472 A1 EP2511472 A1 EP 2511472A1
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EP
European Patent Office
Prior art keywords
tunnel
sacrificial
tunnels
main tunnel
perforations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10835511A
Other languages
German (de)
French (fr)
Other versions
EP2511472A4 (en
EP2511472B1 (en
Inventor
Javier GARCÍA BARBA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GARCIA BARBA, JAVIER
Original Assignee
Universidad de Alicante
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Publication date
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Publication of EP2511472A1 publication Critical patent/EP2511472A1/en
Publication of EP2511472A4 publication Critical patent/EP2511472A4/en
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Publication of EP2511472B1 publication Critical patent/EP2511472B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D13/00—Large underground chambers; Methods or apparatus for making them
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001—Improving soil or rock, e.g. by freezing; Injections

Definitions

  • the present invention focuses on the creation of one or several tunnels or perforations (called tunnel or sacrificial tunnels) with section circular and small diameter and located concentrically at some distance from the main tunnel or perforation, they can be coated or not, such that they assume stresses and deformations (horizontal and vertical) caused by the earth strata or solid rocks located above the main tunnel or perforation.
  • tunnel or sacrificial tunnels with section circular and small diameter and located concentrically at some distance from the main tunnel or perforation, they can be coated or not, such that they assume stresses and deformations (horizontal and vertical) caused by the earth strata or solid rocks located above the main tunnel or perforation.
  • the results of numerical models carried out demarcate that it must be located at a distance from the keystone of the main tunnel (2) of between 30% and 50% of the height of the main tunnel or perforation; in the case of considering the need that they are several, they will be distributed in a horizontal plane symmetrically with respect to a vertical plane containing the guideline of the main tunnel (2) and the keystone of the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

Method for making tunnels or perforations in civil engineering works using sacrificial tunnels. This invention concerns the excavation of sacrificial tunnels to reduce or eliminate the need to use supporting elements in the construction of any tunnel. Accordingly a method is provided to make tunnels or perforations in civil engineering works to reduce or eliminate the use of supporting elements for earth or solid rock, characterized by the creation of a sacrificial tunnel, such that this sacrificial tunnel deforms by taking on the stresses and deformations caused by the weight of the earth and preventing transmission thereof to the main tunnel. The sacrificial tunnel, which may be used in conjunction with others, must in any case have a smaller diameter than the main tunnel and be located at a specific distance above the keystone of the main tunnel.

Description

    Field of the invention
  • The invention falls within the technical sector of the creation of tunnels and perforations for making linear construction projects, whether road, railroad, mining, communication, and goods transport tunnels, and all those related with perforations for the extraction of gases or combustible (solid or liquid) materials.
    • Background of the invention
  • The creation of the different types of tunnels and perforations in civil engineering works is carried out mainly in earth of solid rocks with low bearing capacity or high deformability, where a whole of systems annexed to the main excavation takes place and they serve as support of the earth or solid rock in which the excavation is made.
  • As an anchor and support mechanism solid bolts are used normal to the direction of advance of the main tunnel, they can be grouped in structures of bolt umbrella or fiberglass bolts located on the advancing front, achieving the supporting of the structure when reducing stresses and deformations (horizontal and vertical) that occur during the excavation works, caused by the weight of the earth or solid rock located above the excavation site, assuming these materials part of stress and deformation states of the work.
  • Regardless of the constructive procedure considered for the creation (German, Belgian, new Austrian method, tunnel boring machine in different formats), the bolts are very important elements in the above-defined sector, since their correct sizing allows a proper realization of the work, avoiding partial or complete collapses of both the advancing front and the part already excavated. Currently, this whole set of annexed systems needs for its creation both a complex equipment of work and high budget rates.
  • The aim would be to reduce stresses and deformations values in the main tunnel, moderating and eliminating in turn the need to use systems annexed to the same and thus decreasing both the time-frame for construction and the budget rates intended for that purpose, allowing an increase in safety during the realization of the works.
    • Explanation of the invention
  • The present invention focuses on the creation of one or several tunnels or perforations (called tunnel or sacrificial tunnels) with section circular and small diameter and located concentrically at some distance from the main tunnel or perforation, they can be coated or not, such that they assume stresses and deformations (horizontal and vertical) caused by the earth strata or solid rocks located above the main tunnel or perforation.
    • Brief description of the drawings
  • In the event that the sacrificial tunnel (1) is unique, as shown in figures 1 and 2, the sacrificial tunnel (1) is located above the vertical of the keystone of the main tunnel (2), at a distance of between 30% and 50% of the height of the latter, and with a diameter of between 10% and 20% of the height of the main tunnel, keeping the axis of the sacrificial tunnel parallel to the axis of the main tunnel.
    • Figure 1
      Cross section of a tunnel in any section of earth, made with semicircular shape with elephant leg in the support area, being represented only and because of symmetry, the left side of the work. Above the keystone of the main tunnel (2), is located the sacrificial tunnel (1), in order to assume part of the stress and deformational state of the earth above it to the zero height of the same.
    • Figure 2
      Cross-longitudinal section of the same tunnel shown in Figure 1, in which can be seen as the sacrificial tunnel (1) is parallel to the main tunnel (2), at a distance defined above the keystone of the latter.
    Detailed description of the invention
  • The sacrificial tunnel (1), located in the vertical or in the vicinity of the keystone of the main tunnel or perforation, will be in circular section acting similarly to a sacrificial anode for the protection of corrosive processes, being responsible for taking the stresses and deformations due to the existence of the different earth strata or solid rocks located above the main tunnel or perforation, being deformed under these loads and thus avoiding that they are transmitted to the main section of the tunnel or perforation.
  • To do this, and depending on the mechanical and resistance characteristics of the earth or solid rock on which the works are carried out, the sacrificial tunnel (1) must be made prior to the main tunnel or perforation and by suitable mechanical methods during the excavation, being considered the best possible solution to its subsequent coating, in terms of the type of earth or solid rock object of the excavation works.
  • Numerical models carried out on different types of earth and rocky materials show that the diameter of the sacrificial tunnel (1) must have a value of between 10% and 20% of the height of the main tunnel (2) (or in the case of perforations, of the diameter of the same), being coated with hollow steel tube, gunite or hollow concrete, hollow glass fiber or geogrid with low transverse stiffness. In the event that the sacrificial tunnel (1) is unique, the results of numerical models carried out demarcate that it must be located at a distance from the keystone of the main tunnel (2) of between 30% and 50% of the height of the main tunnel or perforation; in the case of considering the need that they are several, they will be distributed in a horizontal plane symmetrically with respect to a vertical plane containing the guideline of the main tunnel (2) and the keystone of the same.
    • Exemplary embodiment
  • The present invention is further illustrated by the following two examples, which are not intended to be limiting of its scope:
    • Example 1
  • The main tunnel of 6 m in height (with semicircular section and elephant leg in the lower sides) and coating of gunite, is located in an earth of low bearing capacity, the sacrificial tunnel is a concrete circular hollow tube with high transverse stiffness (EI = 2,25.104 KN.m2/m), located on the vertical of the keystone of the main tunnel, 2.50 meters above the keystone and with a radius of 0.25 meters.
    • Example 2
  • In an area with high deformation capacity, the main tunnel is 6 meters in height (with semicircular section and elephant leg in the lower sides) and coating of gunite. The sacrificial tunnel would be in circular section of steel hollow tube with low transverse stiffness (EI = 1000 KN.m2/m), located on the vertical of the keystone of the main tunnel, 2 meters above the keystone and with a radius of 0.35 meters.

Claims (4)

  1. Method for making tunnels or perforations in civil engineering works to reduce or eliminate the use of supporting systems for earth or solid rock, characterized by the creation of a sacrificial tunnel, with a diameter of between 10% and 20% of the height of the main tunnel, and at the vertical of the keystone of the main tunnel at a distance of between 30% and 50% of the height of the main tunnel.
  2. Method according to the claim 1, where the sacrificial tunnel is coated with hollow steel, gunite or hollow concrete, hollow glass fiber or geogrid.
  3. Method according to previous claims, where there are several sacrificial tunnels, located in a horizontal plane of symmetrically shape with respect to a vertical plane containing the guideline of the main tunnel and the keystone of the same.
  4. Use of method according to the claim 3 to reduce the stress state and deformations affecting the main tunnel during its creation.
EP10835511.6A 2009-12-09 2010-12-09 Method for making tunnels or perforations in civil engineering works using sacrificial tunnels Not-in-force EP2511472B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200902300A ES2361702B2 (en) 2009-12-09 2009-12-09 PROCEDURE FOR THE EXECUTION OF TUNNELS OR PERFORATIONS IN CIVIL WORK THROUGH SACRIFICE TUNNELS.
PCT/ES2010/000499 WO2011070188A1 (en) 2009-12-09 2010-12-09 Method for making tunnels or perforations in civil engineering works using sacrificial tunnels

Publications (3)

Publication Number Publication Date
EP2511472A1 true EP2511472A1 (en) 2012-10-17
EP2511472A4 EP2511472A4 (en) 2015-10-28
EP2511472B1 EP2511472B1 (en) 2017-11-15

Family

ID=44114497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10835511.6A Not-in-force EP2511472B1 (en) 2009-12-09 2010-12-09 Method for making tunnels or perforations in civil engineering works using sacrificial tunnels

Country Status (3)

Country Link
EP (1) EP2511472B1 (en)
ES (2) ES2361702B2 (en)
WO (1) WO2011070188A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE658228A (en) * 1964-01-18 1965-04-30
DE2320366A1 (en) * 1973-04-21 1974-11-07 Beton & Monierbau Ag PROCESS FOR SECURING THE OUTBREAK AND LIMITING MOUNTAIN DEFORMATIONS IN THE MOUNTAIN MANNICAL PRODUCTION OF TUBE-SHAPED CAVES
DE3501128C3 (en) * 1985-01-15 1998-11-12 Keller Grundbau Gmbh Sealing for the execution of underground structures
JP2955893B2 (en) * 1991-05-27 1999-10-04 大成建設株式会社 Ground reinforcement method
JP2648051B2 (en) * 1991-07-19 1997-08-27 株式会社フジタ Construction method of arch shell in tunnel precedent
JP2597298B2 (en) * 1993-09-06 1997-04-02 アイサワ工業株式会社 Preceding method for the ground in front of the tunnel face
JPH09328999A (en) * 1996-06-11 1997-12-22 Hazama Gumi Ltd Method for excavating large scale underground cavity
US6520718B1 (en) * 1998-11-27 2003-02-18 Shigeki Nagatomo, Et Al. Sardine-bone construction method for large-section tunnel
JP2005200992A (en) * 2004-01-19 2005-07-28 Ohbayashi Corp Construction method for tunnel
FR2875015B1 (en) * 2004-09-07 2007-01-05 Bouygues Travaux Publics Sa METHOD AND DEVICE FOR DETECTING THE POSSIBLE MOVEMENTS OF A GROUND CONSECUTIVE TO THE CREATION OF AN EXCAVATION EXTENDED IN THE FIELD

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011070188A1 *

Also Published As

Publication number Publication date
ES2361702B2 (en) 2011-11-02
EP2511472A4 (en) 2015-10-28
ES2361702A1 (en) 2011-06-21
ES2660009T3 (en) 2018-03-20
EP2511472B1 (en) 2017-11-15
WO2011070188A1 (en) 2011-06-16

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