EP0046818B1 - Connexion glissante à serrage pour des segments chevauchants de poutrelles des soutènements de galeries minières - Google Patents

Connexion glissante à serrage pour des segments chevauchants de poutrelles des soutènements de galeries minières Download PDF

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Publication number
EP0046818B1
EP0046818B1 EP80105216A EP80105216A EP0046818B1 EP 0046818 B1 EP0046818 B1 EP 0046818B1 EP 80105216 A EP80105216 A EP 80105216A EP 80105216 A EP80105216 A EP 80105216A EP 0046818 B1 EP0046818 B1 EP 0046818B1
Authority
EP
European Patent Office
Prior art keywords
clamping assembly
sliding clamping
profile
hose
assembly according
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.)
Expired
Application number
EP80105216A
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German (de)
English (en)
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EP0046818A1 (fr
Inventor
Werner Dr.-Ing. Dürrfeld
Heinrich Quante
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.)
GTG Gesteins- und Tiefbau GmbH
Original Assignee
GTG Gesteins- und Tiefbau GmbH
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 GTG Gesteins- und Tiefbau GmbH filed Critical GTG Gesteins- und Tiefbau GmbH
Priority to EP80105216A priority Critical patent/EP0046818B1/fr
Priority to DE8080105216T priority patent/DE3068602D1/de
Publication of EP0046818A1 publication Critical patent/EP0046818A1/fr
Application granted granted Critical
Publication of EP0046818B1 publication Critical patent/EP0046818B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure

Definitions

  • the invention relates to a pressure-compliant clamping connection of overlapping and interleaved expansion profile segments of route development in mining and tunneling according to the preamble of claim 1.
  • the invention is particularly applicable to channel-shaped, preferably congruent channel profiles and to their various tab connections.
  • This is either a half-clamp, which encompasses the outer profile end and interacts with hook-head screws, which are supported with their heads on the flanges of the inner profile.
  • Such tab connections are particularly suitable for floor-supported channel profiles.
  • Such tab connections are used particularly frequently on flange-supported channel profiles. Clamping connections of this type must be designed in such a way that, regardless of the sliding together of the profiles, the most uniform possible resistance to expansion is established in the construction concerned and, on the other hand, they do not separate the profile ends from one another even with increasing overlap.
  • the insertion resistance in the overlap depends on the frictional connection of the profile ends in the overlap and thus on the fluctuating coefficients of friction and the tightening of the tab bolts.
  • the flat iron is made of relatively soft steel and hangs freely between the profile ends (Spruth, line expansion in steel, Verlagippoetz GmbH, Essen, 1955, p. 136 fig. 113).
  • the profile ends are held together using one-piece tabs that cannot be braced.
  • the non-positive, pressure-compliant connections either have deflectors which cover a partial cross-section of the face of the inner profile facing the mountains and are intended to avoid braking of the tab connection assigned to the inner profile.
  • the hook heads or the half clamps interacting with them are fixed with the help of brackets at least on the front side of the inner profile (Spruth, op. Cit. P. 135, fig. 111).
  • the aim was to open the support hoses and to connect the building to the mountains based on this, but at the same time to prevent gaps in the overlaps into which the expansion could move.
  • the cross-section of the support hoses should therefore be reduced in the area of the tensioning connections in order to create a weak point there, which should lead to overloading of the support hose at this point when the structure gives way.
  • the support hose should be overloaded at the point in question, in order to form shear fractures in the hose filling, which enable the construction to act in the otherwise normal manner by pushing the individual segments against one another (DE-B- 2,627,256).
  • the invention has for its object to provide a pressure-compliant, preferably maintenance-free tensioning connection, which results in an equalization of the expansion resistance when inserting the profiles in the overlaps and at the same time ensures the connection of the overlap to the mountains even when the full flexibility is used.
  • Reinforced building material has the property of forming cracks in the event of overload, but at the same time maintaining its cohesion for a comparatively long time. Since, according to the invention, the load on the reinforced building material is limited to the form fit of the end face of the inner profile and the bracket of the flap on the embedding in the underside of the backfill body, on the one hand it prevents the connections from sliding along the underside of the building material body and on the other hand limits its destruction to this partial area . There, deformation work is carried out, which locally cuts the building material and possibly also the reinforcement. The deformation work is performed at every transition to sliding friction, which smoothes the function in the load-displacement diagram, i. H. the resistance to expansion is evened out.
  • the blocking of the connection is avoided, however, in that the non-embedding or partial embedding of the parts of the tab connection which overlap the inner profile and which are associated with the end of the outer profile in the backfill body reduces or prevents the deformation resistance of these parts compared to the deformation resistance of the parts of the other tab connection.
  • the non-embedding and the partial embedding are equivalent within certain limits, because it has surprisingly been found that the only thing that is important is to reduce the resistance to deformation of the parts of the tab connection assigned to the end of the outer profile that overlap the inner profile.
  • prefabricated backfill bodies can be used for the overlaps of the burrows, which can be used as building materials, e.g. B. are designed as reinforced concrete parts. But you can also make the backfill on the spot with a formwork made of concrete after you have installed the reinforcement in the formwork. In particular, lost formwork should be preferred because it makes a special formwork removal process unnecessary.
  • the fabric hoses described at the outset are preferably suitable in partial lengths corresponding to the overlaps, or else in the known embodiment in which the hoses backfill the entire extent of the expansion.
  • Such fabric hoses are particularly suitable because the fabric of these hoses is simultaneously effective as lost formwork and as reinforcement of the hardened mortar.
  • These backfill hoses are also particularly easy to use. All you need is, contrary to the previous method of handling, in which tubes which have been unwound to form a roll package and inserted by the local people into the ridge segment are inserted with their freely hanging ends after the stamps have been attached, after the tabs have been attached to the end of the tab assigned to the forest segment only to lay the hose in a fold.
  • the inner or ridge segment profile of an arched extension is designated by 1.
  • This segment can form a one-piece cap, but can also overlap with another ridge segment in the apex of the route.
  • the connection shown in Fig. 1 is at all overlaps of the arch.
  • the ridge segment or inner profile 1, like the outer or butt segment profile 2 overlapped with its end, consists of congruent channel profile sections.
  • there are flange-supported channel profiles which accordingly combine a profile base 3, adjoining, outwardly diverging legs 4, 5 and flanges 6, 7 arranged at the ends of the legs 4, 5 in a structural unit.
  • the profiles of the inner and outer profiles 1 and 2 which are laid one inside the other, are then supported on one another at the flanges, while a distance 8 is formed between the profile bases 3 of the nested profiles 1, 2.
  • a screwable tab 10 is assigned to the end 9 of the inner or ridge segment profile lying in the overlap, while a screwable tab 14 is assigned to the end 12 of the outer or butt segment profile 2, which is generally designated 11 by the overlap of the two profile segments 1, 2.
  • the two tabs 10, 14 are identical, so that the tab 10 is explained in more detail with reference to FIG. 2.
  • the half clamp 15 has ear-shaped projections which are positively connected to the end face 30 of the outer profile 12 by means of cams 29.
  • a woven hose 31 is unwound from a roll package and inserted into the interior of the profiles 1, 2. Its ends were tied off as shown schematically at 32 and 33.
  • the hose section 31 was pressurized with a hydraulic mortar filled 34 and positioned in such a way - biases that he can be seen with a large part of its outer surface, as at 35, is applied flat against a wire mat delay 36 of the mountain 37th
  • the flattening of the hose, designated 35 is adjoined by outwardly curved side parts 46, 47, which merge into inwardly curved partial regions 48, 49, which are connected to one another by an essentially flattened or slightly outwardly curved part 50.
  • Another fold 58 is created on the flanks of the tube by the loose insertion of the fabric tube, which has brought about a positive fit at 59 with the hook heads of the tab 10.
  • the fold 56 is formed much deeper than the folds 56, 58.
  • the resistance to deformation that the tube of the profile 1 opposes is also greater than that of the hook heads 24 Find the tab 14 of the outer profile 2 on the hose.
  • the ridge segments 1 forming the inner profile are first placed on the usual pre-pledge rails. Then you cut the desired hose length 31 from the roll and place it completely in the end 9 of the inner profile 1. The free end 32 is allowed to hang down over the end face 27 of the inner profile. Otherwise, the hose section 31 is additionally connected to the inner profile 1. Then you put the shock stamp 2 forming the outer profile from the inside against the ridge segment profile 1 and attach the tabs 10, 14, which is not hindered by the hose lying inside the profile 1.
  • the fold 55 is formed by pulling the hose end lying in the inner profile 1 downwards. Then a probe is inserted into the tube, with which the tube is filled under pressure with the mortar 34, whereby the shape of the tube 31 described above is created. The wire mat warp 36 is also pressed against the mountain ridge 37.
  • the fabric hose 31 has only been slightly stretched due to a strong reduction in the cavity above the tab 14, so that no positive locking has occurred with the screw heads 24 of the tab 14.
  • the fold 55 has been formed by pushing back the end of the hose 31 which initially hangs down, as a result of which the form-locking connection shown in connection with FIG. 3 also results in the screw heads on a fold 59 on the tab 10.
  • the effects described in connection with FIGS. 1 to 3 also occur in the embodiment according to FIG. 4, with the difference that a positive fit and an increased braking effect associated therewith the heads of the lug screws of the connection 14 does not occur.
  • the hose section 31 can extend over the entire circumference of the arch, which is then filled with the mortar at several points in succession and stretched out.
  • a molded body made of reinforced concrete is used as a finished part after Attaching the tabs 10, 14 inserted between the wire warping mats 36 and the expansion profiles 1, 2. Then you will usually provide an additional backfill of the delay 36 with hand stones, but more appropriately but with a known blowing offset, which is introduced from the front side of the expansion into the space between the wire warping mats 36 and the mountains.
  • backfill bodies corresponding to the hose 31 can also be produced with in-situ concrete.
  • a lost formwork is used, in which reinforcement may have been inserted beforehand. Expediently, however, the lost formwork is reinforced and you can then do without reinforcing the core of the backfill.
  • the fold 55 must be made stronger by pushing the hose together than the fold forming on the inner half clamp of the tab 14. This is relatively easy to do by pulling the end 33 of the hose section 31 and thereby smoothing the hose in the area of the clamp 14.
  • the fabric hose 31 is inserted over the entire scope of the construction.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Claims (6)

1. Connexion glissante à serrage pour des segments chevauchants de soutènements de galeries minières, dans laquelle on prévoit dans la zone de chevauchement une attache vissable respective, associée à l'extrémité du profilé intérieur tourné vers le terrain et du profilé extérieur, qui est reliée par concordance de formes au côté frontal (27; 30) du profilé intérieur ou extérieur (1; 2), caractérisée en ce que le côté frontal (27) du profilé intérieur (1) est fixé par concordance de formes et au moyen de ses flas- quas (6, 7) contre lesquels s'applique l'étrier (28) de l'attache (10) par encastrage dans le côté inférieur (50) d'un élément de remplissage arrière (31), réalisé en un matériau armé qui remplit au minimum la cavité située à l'arrière de la zone de chevauchement (11) et du profilé extérieur (2) au moins partiellement sur une longueur correspondant à la flexibilité, et en ce qu'en n'encastrant pas ou en n'encastrant que partiellement la partie (24) de l'attache (14) associée à l'extrémité (12) du profilé extérieur (2) et en saillie sur le profilé intérieur (1), on réduit ou on élimine la résistance à la déformation de cette partie par rapport à la résistance à la déformations des parties (28, 24) de l'autre attache (10).
2. Connexion glissante à serrage selon la revendication 1, caractérisée en que l'élément arrière de remplissage (31) est constitué par un tronçon de tuyau tissé sur métier circulaire, rempli d'une matière de remplissage qui prend et durcit hydrauliquement quand elle est soumise à une pression, tronçon dans lequel est constitué un pli (55) pour réaliser l'adaptation par concordance de formes avec les parties (19, 28) de l'attache (10) associée à l'extrémité (9).
3. Connexion glissante à serrage selon la revendication 1, caractérisée par un élément de montage en matériau de construction constituant l'élément de remplisage arrière (31).
4. Connexion glissante à serrage selon la revendication 1, caractérisée par un coffrage dans lequel est coulé le béton et est disposée l'armure, constituant l'élément de remplissage arrière (31).
5. Connexion glissante à serrage selon la revendication 4, caractérisée en ce que le coffrage dans lequel est coulé le béton est constitué sous forme d'un coffrage perdu qui contient l'armature.
6. Connexion glissante à serrage selon l'une des revendications 1 à 5, caractérisée par un élément de refoulement fixé au côté frontal (27) du profilé intérieur (1).
EP80105216A 1980-09-02 1980-09-02 Connexion glissante à serrage pour des segments chevauchants de poutrelles des soutènements de galeries minières Expired EP0046818B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP80105216A EP0046818B1 (fr) 1980-09-02 1980-09-02 Connexion glissante à serrage pour des segments chevauchants de poutrelles des soutènements de galeries minières
DE8080105216T DE3068602D1 (en) 1980-09-02 1980-09-02 Sliding clamping assembly for mine roof support arches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80105216A EP0046818B1 (fr) 1980-09-02 1980-09-02 Connexion glissante à serrage pour des segments chevauchants de poutrelles des soutènements de galeries minières

Publications (2)

Publication Number Publication Date
EP0046818A1 EP0046818A1 (fr) 1982-03-10
EP0046818B1 true EP0046818B1 (fr) 1984-07-18

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EP80105216A Expired EP0046818B1 (fr) 1980-09-02 1980-09-02 Connexion glissante à serrage pour des segments chevauchants de poutrelles des soutènements de galeries minières

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EP (1) EP0046818B1 (fr)
DE (1) DE3068602D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239343C2 (de) * 1982-10-23 1986-01-23 TechnoARBED Deutschland GmbH, 6600 Saarbrücken Spannverbindung für ineinanderliegende verschiebbare Rinnenprofile für den Grubenausbau
JPS6040499A (ja) * 1983-08-16 1985-03-02 岡部株式会社 トンネルにおける鋼ア−チ支保工
GB9013211D0 (en) * 1990-06-13 1990-08-01 Bradbury Lyndon D Roadway support
CN108019228A (zh) * 2018-01-17 2018-05-11 安徽理工大学 一种柔性让压的治理巷道底臌的联合支护结构及其施工方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627256C3 (de) * 1976-06-18 1979-09-20 5600 Wuppertal Ausbau für den Untertagebergbau

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Spruth, Streckenausbau in Stahl, Verlag Glückauf GmbH, Essen, 1955, S. 136 *

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Publication number Publication date
EP0046818A1 (fr) 1982-03-10
DE3068602D1 (en) 1984-08-23

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