CN104343458A - Full-section wide-width one-piece type steel bracket and supporting method thereof - Google Patents

Full-section wide-width one-piece type steel bracket and supporting method thereof Download PDF

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Publication number
CN104343458A
CN104343458A CN201410513372.4A CN201410513372A CN104343458A CN 104343458 A CN104343458 A CN 104343458A CN 201410513372 A CN201410513372 A CN 201410513372A CN 104343458 A CN104343458 A CN 104343458A
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China
Prior art keywords
shaped steel
annular solid
type connector
lap
joint
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CN201410513372.4A
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Chinese (zh)
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CN104343458B (en
Inventor
余伟健
王平
杜少华
朱永建
李树清
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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Priority to CN201410513372.4A priority Critical patent/CN104343458B/en
Publication of CN104343458A publication Critical patent/CN104343458A/en
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Publication of CN104343458B publication Critical patent/CN104343458B/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/006Lining anchored in the rock
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/18Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/18Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E21D11/22Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure

Abstract

The invention discloses a full-section wide-width one-piece type steel bracket and a supporting method thereof. The steel bracket comprises a plurality of parallel annular bodies, wherein a plurality of beam type connectors are axially and symmetrically arranged on each annular body to form a connected structure of the annular bodies; a plurality of anchor rods are radially and uniformly distributed on the annular bodies and the beam type connectors. According to the steel bracket, the annular bodies are connected by the beam type connectors to form the one-piece bracket, so that the supporting range of the annular bodies is expanded in the direction of a roadway, and the overall supporting effect is enhanced; meanwhile, the beam type connectors of the two adjacent annular bodies are slidably connected, so that the annular body bracket can be axially contracted along the roadway and the supporting effect of the soft rock roadway is greatly improved.

Description

A kind of tunneling boring large width concatemer shape steel bracket and supporting method thereof
Technical field
The present invention relates to soft rock roadway support field, particularly a kind of tunneling boring large width concatemer shape steel bracket of the heavily stressed large deformation soft rock roadway support for underground mining or geotechnics and supporting method thereof.
Background technology
Along with the exploitation of mineral resources, the supporting of various soft-rock tunnel (as geology soft-rock tunnel and deep-well high stress and soft rock mine roadway) becomes a difficult problem for puzzlement mining development.For soft-rock tunnel, common flexible supporting structure or rigid protection structure are all not enough to maintain the stable of tunnel, and main Problems existing has: 1. flexible supporting structure strength deficiency, effectively can not control the continuous deformation of country rock; 2. rigid protection structural support scope is little, is difficult to form integral rigidity supporting, and to form integral rigidity supporting, support cost can be very high, uneconomical economically.Find through further investigation, the support issues of soft-rock tunnel be solved, need one can continue to provide high resistance, simultaneously large the and good supporting and protection structure of globality of supporting scope.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the tunneling boring large width concatemer shape steel bracket that a kind of supporting intensity is high, supporting area is large, cost is low, resistance to overturning is good, and the method adopting shape steel bracket to carry out supporting is provided.
The technical scheme that the present invention solves the problem is: a kind of tunneling boring large width concatemer shape steel bracket, comprise multiple annular solid arranged in parallel, each annular solid is arranged with vertically multiple beam type connector, form the conjoined structure of multiple annular solid, described annular solid and beam type connector are evenly laid with many anchor poles radially.
In above-mentioned tunneling boring large width concatemer shape steel bracket, described annular solid comprises about two the first shaped steel be oppositely arranged and about two the second shaped steel be oppositely arranged, it is straight plate shape in the middle part of described first shaped steel, two ends are curved, described second shaped steel is arch, described first shaped steel and the second shaped steel dislocation lap joint the oval frame shelf structure of the looping body that joins end to end.
In above-mentioned tunneling boring large width concatemer shape steel bracket, the overlapping part place of the first shaped steel and the second shaped steel is located at by described beam type connector, beam type connector comprises two the 3rd shaped steel and the 4th shaped steel that are parallel to each other, 3rd shaped steel is provided with a depressed area, depressed area dorsad the 4th shaped steel is arranged, the overlapping part of described first shaped steel and the second shaped steel is wrapped in the depressed area of the 3rd shaped steel, with the first bolt and the first nut, the 3rd shaped steel and the 4th shaped steel are clamped, lap-joint is also fixed by the second bolt and the second nut by the beam type connector dislocation lap joint of corresponding position respectively and on the annular solid be adjacent, the two ends of the beam type connector on each annular solid.
In above-mentioned tunneling boring large width concatemer shape steel bracket, the two ends of described 3rd shaped steel and the 4th shaped steel all offer chute, can slide in chute in the chute that second bolt is arranged in adjacent two beam type connector lap-joints, can relative sliding between adjacent two beam type connectors under the cooperation of the second bolt and the second nut.
In above-mentioned tunneling boring large width concatemer shape steel bracket, the cross sectional shape of described 3rd shaped steel and the 4th shaped steel and the mating shapes of the first shaped steel and the second shaped steel overlapping part, described first shaped steel and the second shaped steel all adopt concavo-convex alternate shaped steel.
In above-mentioned tunneling boring large width concatemer shape steel bracket, described first shaped steel and the second shaped steel lap-joint are folded with the first contractibility high resistant pad, on described adjacent two annular solids, the beam type connector lap-joint of corresponding position is folded with the second contractibility high resistant pad, and on described beam type connector, skyhook position is provided with the 3rd contractibility high resistant pad.
Adopt tunneling boring large width concatemer shape steel bracket to carry out a method for supporting, comprise the following steps:
1) first annular solid is placed on a section in tunnel, at the sandwiched first contractibility high resistant pad of the first shaped steel of annular solid and the lap-joint of the second shaped steel;
2) the first shaped steel of annular solid and the lap-joint of the second shaped steel are folded between beam type connector the 3rd shaped steel and the 4th shaped steel, and with the first bolt and the first nut, the 3rd shaped steel and the 4th shaped steel are clamped, the annular solid that this completes on a section is installed;
3) step 1) and step 2 is repeated), keep at a certain distance away and second annular solid installed, by the beam type connector of second annular solid together with the beam type connector dislocation lap joint of first annular solid corresponding position, and place the second contractibility high resistant pad in lap-joint, utilize the second nut and the second bolt lap-joint to be tightened, this completes the connection between two adjacent ring bodies;
4) annular solid if desired connected more than two, then repeats step 3), and the conjoined structure completing multiple annular solid is installed;
5) at the bolthole place skyhook that each annular solid is preset, skyhook after the 3rd contractibility high resistant pad with holes is placed at the bolthole place that beam type connector is preset, by annular solid and beam type fastening connector on crag.
Beneficial effect of the present invention is:
1, annular solid of the present invention adopts concavo-convex alternate shaped steel, adds the rigid contact area of annular solid and rock mass, overcomes the shortcoming that ordinary stent lifting surface area is little;
2, the present invention adds arc contractibility high resistant pad and makes annular solid have contractibility diametrically can to allow pressure between the first shaped steel and the second shaped steel, overcome the deficiency that conventional stent junction easily bloats in tunnel, can allow pressure in the radial direction of tunnel simultaneously, simultaneously, this pad has high-drag on hoop, certain supporting power can be ensured, make roadway surrounding rock and annular solid realize cooperative transformation;
3, the present invention adopts beam type connector that annular solid is connected into concatemer support, walk upwards to expand the supporting scope of annular solid in tunnel, strengthen the effect of integer support, simultaneously, slidably connected mode is adopted between the beam type connector of adjacent two annular solids, make annular solid axially also can realize contractibility along tunnel, this also significantly strengthens the supporting effect of soft-rock tunnel;
4, the present invention is provided with anchor pole on annular solid and beam type connector, further increases the stability of annular solid.
Accompanying drawing explanation
Fig. 1 is the front view of the embodiment of the present invention.
Fig. 2 is the lateral view of the embodiment of the present invention.
Fig. 3 is the stereogram of the embodiment of the present invention.
Fig. 4 is the front view of annular solid in the embodiment of the present invention.
Fig. 5 is the top view of annular solid in the embodiment of the present invention.
Fig. 6 is the lateral view of annular solid in the embodiment of the present invention.
Fig. 7 is the front view of beam type connector in the embodiment of the present invention.
Fig. 8 is the lateral view of beam type connector in the embodiment of the present invention.
Fig. 9 is the sectional drawing of beam type connector in the embodiment of the present invention.
Figure 10 is the johning knot composition of adjacent two beam type connectors in the embodiment of the present invention.
Figure 11 is the profile of annular solid overlapping part in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, Figure 2, Figure 3 shows, shape steel bracket of the present invention comprises multiple annular solid arranged in parallel, each annular solid is arranged with vertically multiple beam type connector 4, by beam type connector 4, adjacent two annular solids are linked together, form the conjoined structure of multiple annular solid, described annular solid and beam type connector 4 are evenly laid with many anchor poles 5 radially, anchor pole 5 is through described annular solid and beam type connector 4, be fixed on crag by annular solid and beam type connector 4, the length of anchor pole 5 and density are determined according to the concrete condition in tunnel.
As shown in Fig. 4, Fig. 5, Fig. 6, each annular solid comprises two the first shaped steel 2 be oppositely arranged and two the second shaped steel 1 be oppositely arranged, described first shaped steel 2 and the second shaped steel 1 all adopt concavo-convex alternate shaped steel, be straight plate shape in the middle part of described first shaped steel 2, two ends are curved, and described second shaped steel 1 is in arch, described second shaped steel 1 size is slightly little, described first shaped steel 2 size is slightly large, but both size and dimensions match, and can agree with in junction; Described first shaped steel 2 and the second shaped steel 1 dislocation lap joint the oval frame shelf structure of the looping body that joins end to end, first shaped steel 2 and the second shaped steel 1 lap-joint are folded with the first contractibility high resistant pad 3, first contractibility high resistant pad 3 is curved, it has contractibility in the radial direction of tunnel, hoop has high-drag, realizes the two-way high resistant of supporting section and allow pressure.
First shaped steel 2 of each annular solid and the overlapping part 15 of the second shaped steel 1 are equipped with beam type connector 4, as shown in figure 11, described beam type connector 4 comprises two the 3rd shaped steel 8 and the 4th shaped steel 9 that are parallel to each other, 3rd shaped steel 8 is provided with a depressed area 7, depressed area 7 dorsad the 4th shaped steel 9 is arranged, the overlapping part of described first shaped steel 2 and the second shaped steel 1 is wrapped in the depressed area 7 of the 3rd shaped steel 8, with the first bolt 11 and the first nut 12, the 3rd shaped steel 8 and the 4th shaped steel 9 are clamped, as shown in Figure 9, on beam type connector 4, skyhook 5 position is provided with the 3rd contractibility high resistant pad 13, 3rd contractibility high resistant pad 13 is curved, as shown in Figure 8, the all curved and mating shapes of its shape and the first shaped steel and the second shaped steel overlapping part in the cross section of described 3rd shaped steel 8 and the 4th shaped steel 9.
As Fig. 3, shown in Figure 10, often beam type connector 4 dislocation lap joint of corresponding position on adjacent two annular solids, lap-joint is fixed by the second bolt and the second nut 14, wherein: the 3rd shaped steel 8 of beam type connector 4 and the two ends of the 4th shaped steel 9 all offer chute 10(as shown in Figure 7), can slide in chute 10 in the chute 10 that second bolt is arranged in adjacent two beam type connector 4 lap-joints, under the cooperation of the second bolt and the second nut 14 dislocation lap joint two beam type connectors 4 between can relative sliding, thus form the conjoined structure of multiple annular solid, the second contractibility high resistant pad 6 is folded with two beam type connector 4 lap-joints, curved and its shape and the 3rd shaped steel and the 4th shaped steel cross sectional shape of second contractibility high resistant pad 6 matches, second contractibility high resistant pad 6 has contractibility in the radial direction of tunnel, hoop has high-drag, axially also there is contractibility along tunnel, form the full section face large width concatemer support that three-dimensional can contract.
Supporting method of the present invention is as follows:
1) first annular solid is placed on a section in tunnel, at the first shaped steel 2 of annular solid and the sandwiched first contractibility high resistant pad 3 of lap-joint of the second shaped steel 1;
2) the first shaped steel 2 of annular solid and the lap-joint of the second shaped steel 1 are folded between beam type connector 4 the 3rd shaped steel 8 and the 4th shaped steel 9, and with the first bolt 11 and the first nut 12, the 3rd shaped steel 8 and the 4th shaped steel 9 are clamped, this completes the support installing of a section;
3) step 1) and step 2 is repeated), keep at a certain distance away and second annular solid installed, by the beam type connector 4 of second annular solid together with beam type connector 4 dislocation lap joint of first annular solid corresponding position, and place the second contractibility high resistant pad 6 in lap-joint, utilize the second nut 14 and the second bolt lap-joint to be tightened, this completes the connection between two adjacent ring bodies;
4) annular solid if desired connected more than two, then repeats step 3), and the conjoined structure completing multiple annular solid is installed;
5) at the bolthole place skyhook 5 that each annular solid is preset, skyhook 5 after the 3rd contractibility high resistant pad with holes is placed at the bolthole place that beam type connector 4 is preset, is anchored on annular solid and beam type connector 4 on crag.
It is to be noted that beam type connector 4 is divided into two kinds: a kind of is arrange depressed area 7 in one end of the 3rd shaped steel 8, and wrap up the overlapping part 15 of the first shaped steel 2 and the second shaped steel 1, the other end has chute 10; And another kind arranges depressed area 7, two ends have chute 10.If only need two annular solids to be connected, the beam type connector 4 that first annular solid and second annular solid are installed is all that one end arranges depressed area 7, and the other end has the beam type connector 4 of chute, but the direction of installing is contrary.If desired connect more annular solid and form concatemer support, first annular solid is identical with the beam type connector 4 that last annular solid adopts, all that one end arranges depressed area 7, the other end has the beam type connector 4 of chute, but installation direction is contrary, and first annular solid arranges depressed area 7 in the middle of adopting with the annular solid in the middle of last annular solid, two ends have the beam type connector 4 of chute 10, by at the second bolt and the second nut 14 by the beam type connector dislocation lap joint of corresponding position on adjacent two annular solids, realize contractibility and connect.

Claims (7)

1. a tunneling boring large width concatemer shape steel bracket, it is characterized in that: comprise multiple annular solid arranged in parallel, each annular solid is arranged with vertically multiple beam type connector, form the conjoined structure of multiple annular solid, described annular solid and beam type connector are evenly laid with many anchor poles radially.
2. tunneling boring large width concatemer shape steel bracket as claimed in claim 1, it is characterized in that: described annular solid comprises about two the first shaped steel be oppositely arranged and about two the second shaped steel be oppositely arranged, it is straight plate shape in the middle part of described first shaped steel, two ends are curved, described second shaped steel is arch, described first shaped steel and the second shaped steel dislocation lap joint the oval frame shelf structure of the looping body that joins end to end.
3. tunneling boring large width concatemer shape steel bracket as claimed in claim 2, it is characterized in that: the overlapping part place of the first shaped steel and the second shaped steel is located at by described beam type connector, beam type connector comprises two the 3rd shaped steel and the 4th shaped steel that are parallel to each other, 3rd shaped steel is provided with a depressed area, depressed area dorsad the 4th shaped steel is arranged, the overlapping part of described first shaped steel and the second shaped steel is wrapped in the depressed area of the 3rd shaped steel, with the first bolt and the first nut, the 3rd shaped steel and the 4th shaped steel are clamped, lap-joint is also fixed by the second bolt and the second nut by the beam type connector dislocation lap joint of corresponding position respectively and on the annular solid be adjacent, the two ends of the beam type connector on each annular solid.
4. tunneling boring large width concatemer shape steel bracket as claimed in claim 3, it is characterized in that: the two ends of described 3rd shaped steel and the 4th shaped steel all offer chute, can slide in chute in the chute that second bolt is arranged in two beam type connector lap-joints, under the cooperation of the second bolt and the second nut dislocation lap joint two beam type connectors between can relative sliding.
5. tunneling boring large width concatemer shape steel bracket as claimed in claim 4, it is characterized in that: the cross sectional shape of described 3rd shaped steel and the 4th shaped steel and the mating shapes of the first shaped steel and the second shaped steel overlapping part, described first shaped steel and the second shaped steel all adopt concavo-convex alternate shaped steel.
6. tunneling boring large width concatemer shape steel bracket as claimed in claim 5, it is characterized in that: described first shaped steel and the second shaped steel lap-joint are folded with the first contractibility high resistant pad, on described adjacent two annular solids, the beam type connector lap-joint of corresponding position is folded with the second contractibility high resistant pad, and on described beam type connector, skyhook position is provided with the 3rd contractibility high resistant pad.
7. adopt the tunneling boring large width concatemer shape steel bracket as described in claim 1 ~ claim 6 to carry out a method for supporting, comprise the following steps:
1) first annular solid is placed on a section in tunnel, at the sandwiched first contractibility high resistant pad of the first shaped steel of annular solid and the lap-joint of the second shaped steel;
2) the first shaped steel of annular solid and the lap-joint of the second shaped steel are folded between beam type connector the 3rd shaped steel and the 4th shaped steel, and with the first bolt and the first nut, the 3rd shaped steel and the 4th shaped steel are clamped, the annular solid that this completes on a section is installed;
3) step 1) and step 2 is repeated), keep at a certain distance away and second annular solid installed, by the beam type connector of second annular solid together with the beam type connector dislocation lap joint of first annular solid corresponding position, and place the second contractibility high resistant pad in lap-joint, utilize the second nut and the second bolt lap-joint to be tightened, this completes the connection between two adjacent ring bodies;
4) annular solid if desired connected more than two, then repeats step 3), and the conjoined structure completing multiple annular solid is installed;
5) at the bolthole place skyhook that each annular solid is preset, skyhook after the 3rd contractibility high resistant pad with holes is placed at the bolthole place that beam type connector is preset, by annular solid and beam type fastening connector on crag.
CN201410513372.4A 2014-09-29 2014-09-29 Full-section wide-width one-piece type steel bracket and supporting method thereof Active CN104343458B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104806271A (en) * 2015-05-15 2015-07-29 湖南科技大学 Precutting-groove U-shaped steel bracket with automatic propelling function and construction method thereof
CN105952474A (en) * 2016-07-08 2016-09-21 山东大学 Rapid construction method for primary support of confined concrete of large-section tunnel

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CN103615259A (en) * 2013-12-06 2014-03-05 中国矿业大学(北京) Structure and method for anchor net cable-shape steel support coupling supporting
CN104047614A (en) * 2014-07-15 2014-09-17 山东科技大学 Supporting method for high-expansion argillization soft rock roadway replacement
CN204113321U (en) * 2014-09-29 2015-01-21 湖南科技大学 A kind of tunneling boring large width concatemer shape steel bracket

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Publication number Priority date Publication date Assignee Title
CN101725362A (en) * 2009-12-09 2010-06-09 中国矿业大学(北京) Composite support device of dynamic pressure softrock tunnel based on steel pipe concrete bracket
CN102852533A (en) * 2012-10-18 2013-01-02 山东大学 High-strength three-dimensional support system of yielding type restriction concrete lagging jack
CN202882942U (en) * 2012-10-18 2013-04-17 山东大学 Confined concrete quantifying yielding arch centering based on mining U-shaped steels
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104806271A (en) * 2015-05-15 2015-07-29 湖南科技大学 Precutting-groove U-shaped steel bracket with automatic propelling function and construction method thereof
CN105952474A (en) * 2016-07-08 2016-09-21 山东大学 Rapid construction method for primary support of confined concrete of large-section tunnel
CN105952474B (en) * 2016-07-08 2018-10-12 山东大学 A kind of large cross-section tunnel confined concrete preliminary bracing rapid constructing method

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