EP2251492A1 - Système de protection pour la sécurisation de chantiers présentant un risque d'éboulements - Google Patents

Système de protection pour la sécurisation de chantiers présentant un risque d'éboulements Download PDF

Info

Publication number
EP2251492A1
EP2251492A1 EP10004683A EP10004683A EP2251492A1 EP 2251492 A1 EP2251492 A1 EP 2251492A1 EP 10004683 A EP10004683 A EP 10004683A EP 10004683 A EP10004683 A EP 10004683A EP 2251492 A1 EP2251492 A1 EP 2251492A1
Authority
EP
European Patent Office
Prior art keywords
reinforcing elements
protection system
tensile
reinforcement
elements
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
EP10004683A
Other languages
German (de)
English (en)
Other versions
EP2251492B1 (fr
Inventor
Andrea Roth
Daniel Flum
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.)
Geobrugg AG
Original Assignee
Geobrugg AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Geobrugg AG filed Critical Geobrugg AG
Priority to PL10004683T priority Critical patent/PL2251492T3/pl
Publication of EP2251492A1 publication Critical patent/EP2251492A1/fr
Application granted granted Critical
Publication of EP2251492B1 publication Critical patent/EP2251492B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements

Definitions

  • the invention relates to a protection system for securing earthquake-prone buildings, such as roads, dams and similar structures.
  • the invention has for its object to avoid these disadvantages and to provide a protection system for roads, dams and similar structures, which is easily and indefinitely progressively installed on site, and the eventuality of a catastrophic collapse reliable prevents and at the same time, however, makes the occurring earth fall recognizable.
  • the structure to be secured is reinforced with rod-shaped, high-tensile and limited tensile reinforcement elements, preferably steel strands, which are preferably laid unstressed between the substructure and the cover layer of the structure.
  • the steel strands which are preferably used as reinforcing elements are known to be commercially available components whose tensile strength and rigidity are determined by the lay length and the diameter and the number of their wires stranded together.
  • the number, location and structure of the steel strands can be adapted to the requirements of a probable event case, so that the road surface or terrain surface learns only permissible deformations according to regulations. At the same time, the fall is visible due to the deformation occurring on the surface.
  • the inventive reinforcement can also be continuously installed, since it is inserted depending on the road type and requirements from the traffic load in the substructure, in the lower region of the superstructure or directly under the Asphaittrag für or concrete pavement. In the case of refurbishment, it can be inserted as a retrofit measure after milling the cover layer underneath.
  • the reinforcing elements are placed in a plane adjacent to each other in the longitudinal direction of the structure. This simplifies the construction of the reinforcement and at the same time ensures a uniform securing of the vulnerable area.
  • the reinforcing elements are conveniently placed in approximately equal lateral spacings. These are determined on a case by case basis, depending on the diameter of the possible collapse funnel, the maximum traffic load or load, the road layout and the position of the reinforcement.
  • each reinforcing element is composed of a plurality of longitudinally one behind the other individual elements, the end coupled or overlapped inserted become. The result is an infinite force-locking reinforcement system between them.
  • the invention further provides that a planar covering element, preferably a wire mesh with wires made of high-strength steel, is applied to the reinforcing elements.
  • the cover element ensures that the load is distributed in terms of area to the reinforcing elements, and at the same time prevents them from penetrating into the overlying cover layer and possibly causing them to break open.
  • the forces acting on the reinforcing elements are removed by friction over the longitudinal axis of the structure. Since the friction between the strand and the ground is relatively low, the previously mentioned flat element, preferably a high-strength braid, which is connected non-positively to the longitudinal elements at regular intervals serves to remove the frictional forces over a reasonable distance. The installation of the braid is crucial. End anchorage of the reinforcement is normally not required, but can be accomplished with reasonable means at a reasonable cost.
  • connection members such as wire rope clamps or similar standard parts.
  • the invention also provides that the reinforcement formed by the reinforcement elements and the cover is inserted directly under the cover layer or in the lower region of the superstructure of the building. In this way, the installation of the reinforcement is facilitated and reduces their load due to ballast.
  • protection system is intended for the protection of earthquake-prone roads.
  • the same system can also be used in dams or similar structures as tensile reinforcement.
  • a reinforcement 4 is inserted between the substructure 1 and the cover layer 2 of the structure 3.
  • the gravel layer could also be part of the superstructure.
  • the reinforcement is embedded in a gravel layer to avoid the direct interaction between the mesh and the asphalt base course.
  • the reinforcement is located more or less directly under the asphalt base course, which is composed of rod-shaped, high-tensile and axially limited stretchable (stretch-resistant) reinforcing elements 5a to 5n and a surface covering element 6 lying thereon.
  • the reinforcing elements 5a to 5n are commercially available steel strands, preferably prestressing steel strands. The number, thickness and lay length of their stranded wires are adapted to the particular conditions of use to give the reinforcement 4 the high tensile strength and rigidity required to withstand the load in case of an incident.
  • the steel strands are usually installed in an untensioned condition. They may also be biased to a slight extent, if necessary. In principle, however, a prestressing of the steel strands is not required, since they automatically load themselves under load, so that one can count on their full load capacity even without prestressing.
  • the reinforcing elements 5a to 5n at regular intervals of about 20 to 50 cm in a plane next to each other installed in the longitudinal direction 7 of the building.
  • the steel strands used may be windable to transport them in a wound state. Otherwise, they are transported as straight bars with a length of up to 12 m.
  • the lateral clearances vary depending on the size of the gravity funnel, the design traffic load, the position of the reinforcement and the project-specific requirements with respect to the maximum permissible deformation.
  • the reinforcing elements 5a to 5n form in elongated structures often longitudinally extending longitudinal reinforcement whose reinforcing elements are composed of a plurality of longitudinally one behind the other and end coupled or overlapped strands. This creates an infinite force-locking connection between them.
  • the anchoring of the system is preferably carried out by friction with the applied flat element over the longitudinal axis of the structure.
  • the flat cover 6 is a high-strength wire mesh, by means of which the force acting on the reinforcement 4 load is distributed flat. This prevents on the one hand that the steel strands 5a to 5n can break the cover layer 2. On the other hand, the load is redistributed at about a strand break due to overload. This is additionally supported, that, like out FIG. 2 it can be seen that the wire mesh 6 is connected to the steel strands 5a to 5n by means of clamps (eg wire rope clamps) 8 or similar standard parts. The wire mesh 6 thus fulfills the task of preventing lateral deflection of the steel strands.
  • clamps eg wire rope clamps
  • wire mesh instead of the wire mesh, in principle, other similar lattice structures or spiral rope nets can be used.
  • a corrosion protection such as by galvanizing, aluminum-zinc coating or wrapping the reinforcement parts with suitable plastics. It can also be used stainless or other high-alloy steels.
  • FIGS. 3 and 4 shows the reinforcement 4 according to the invention, that in case of incident, the top layer of the structure undergoes no inadmissible deformations even at high loads, because the reinforcing elements 5a to 5n can remove the load on the longitudinal axis of the building.
  • FIG. 3 is a load test with a load of about 30 to documented.
  • FIG. 4 shows the topcoat after completion of the experiment and removal of the intended structure. It can be milled off and replaced without affecting the underlying reinforcement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Road Paving Structures (AREA)
EP10004683A 2009-05-08 2010-05-04 Système de protection pour la sécurisation de chantiers présentant un risque d'éboulements Not-in-force EP2251492B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10004683T PL2251492T3 (pl) 2009-05-08 2010-05-04 System ochronny do zabezpieczania budowli zagrożonych zapadliskami

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00728/09A CH701029A2 (de) 2009-05-08 2009-05-08 Schutzsystem zur Sicherung erdfallgefährdeter Bauwerke.

Publications (2)

Publication Number Publication Date
EP2251492A1 true EP2251492A1 (fr) 2010-11-17
EP2251492B1 EP2251492B1 (fr) 2012-07-04

Family

ID=42712708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10004683A Not-in-force EP2251492B1 (fr) 2009-05-08 2010-05-04 Système de protection pour la sécurisation de chantiers présentant un risque d'éboulements

Country Status (3)

Country Link
EP (1) EP2251492B1 (fr)
CH (1) CH701029A2 (fr)
PL (1) PL2251492T3 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1054110A1 (fr) * 1999-05-18 2000-11-22 Huesker Synthetic GmbH & Co. Procédé permettant le développement d'une végétation sur une surface en pente
EP2206836A1 (fr) * 2008-12-23 2010-07-14 Andreas Herold Structure de flanc

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1054110A1 (fr) * 1999-05-18 2000-11-22 Huesker Synthetic GmbH & Co. Procédé permettant le développement d'une végétation sur une surface en pente
EP2206836A1 (fr) * 2008-12-23 2010-07-14 Andreas Herold Structure de flanc

Also Published As

Publication number Publication date
CH701029A2 (de) 2010-11-15
EP2251492B1 (fr) 2012-07-04
PL2251492T3 (pl) 2012-11-30

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