CN102678137B - Flexible grille support and application method thereof - Google Patents
Flexible grille support and application method thereof Download PDFInfo
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- CN102678137B CN102678137B CN201210141901.3A CN201210141901A CN102678137B CN 102678137 B CN102678137 B CN 102678137B CN 201210141901 A CN201210141901 A CN 201210141901A CN 102678137 B CN102678137 B CN 102678137B
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- bow member
- monomer
- main reinforcement
- joint
- reinforcing steel
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Abstract
The invention discloses a flexible grille support and an application method thereof. The flexible grille support comprises a single arch frame which is formed by welded main reinforcing steel bars and stirrups and consists of multiple sections, and the main reinforcing steel bars of adjacent sections are connected by at least one support clamping cable; the support clamping cable is structurally characterized in that reinforcing steel buckles with same quantity as the main reinforcing steel bars of the grille support are welded by virtue of connecting ribs, each reinforcing steel buckle is formed by two splint plates which are in butt joint by virtue of connecting pins and bolts, two circular holes are formed in the abutting surfaces of the splint plates, the main reinforcing steel bars of two sections are inserted into the circular holes from two sides, and a certain pretightening force is applied through the bolts. Compared with other metal flexible supports, the flexible grille support has the advantages of small steel consumption, low cost, light weight, and convenience for transportation and installation; and meanwhile, a flexible critical internal force can be manually controlled.
Description
Technical field
The present invention relates to the support technology of mine working and all kinds of construction of tunnel.
Background technology
In the supporting of mine working and all kinds of construction of tunnel, for suitable for surrounding rock distortion, generally adopt U-shaped steel collapsible timbering at present, shape is commonly Semicircular arched, is made up of arched girder and leg post, has syllogic and four-part form.When installation, if first four-part form is that arched girder is combined, then utilize forestope arch roof beam structure on top board, then help to dig needling two, perpendicular leg post, then leg post and arched girder are locked with card cable, forms one, two of front and back connect with pull bar.It is moving that in the time that pressure from surrounding rock arrives certain value, support produces contracting, and pressure from surrounding rock reduces, and avoids stent failure, guarantees that tunnel or tunnel are in good state.But U-shaped steel collapsible timbering exists the shortcomings such as steel consumption is large, cost is high, weight is large, and transportation and installation are inconvenient.
Grillage is a kind of rack form that is widely used in recent years tunnel support, grillage is welded with main reinforcement and stirrup, general bow member is monomer bow member, for the stability of bow member or the specific (special) requirements of supporting, longitudinally connecting between bow member, make it to become grid-like, so be called grillage.Because grillage belongs to rigid protection, incompressible, when pressure from surrounding rock or distortion are when larger, this support easily occurs that the de-stabilises such as flexing destroy and cause stent failure.
Summary of the invention
For solve when pressure from surrounding rock or distortion when larger support there is the problem that the de-stabilises such as flexing destroy, the invention provides one and there is yieldable grille frame.
The present invention provides the using method of this contractibility grille frame simultaneously.
A kind of contractibility grille frame, comprises the monomer bow member being welded with main reinforcement and stirrup, it is characterized in that, monomer bow member is made up of some joints, and the main reinforcement between joint and joint is connected with the bracket clamp cable that is no less than; The structure of described bracket clamp cable is, with the upper reinforcing bar clasp identical with grille frame main reinforcement quantity of dowel welding, reinforcing bar clasp is formed with connecting pin and bolt docking by two clamping plates, the interface of clamping plate is provided with two circular holes, from both sides, the main reinforcement of two joints is inserted circular hole respectively by two circular holes, and apply certain pretightning force by bolt.
The shape of monomer bow member can be designed to circle, the shape of a hoof, straight leg arch according to drift section shape.
The using method of the present invention's contracting grille frame is that monomer bow member is chamber experiment first by experiment before installing, and tests the size of the bolt of reinforcing bar clasp, makes bolt torque meet the axial force of the supports before grille frame contracting is moved; When monomer bow member is installed, main reinforcement between the joint of monomer bow member and joint is inserted circular hole from bracket clamp cable both sides respectively, connect into blank, and the section configuration of monomer bow member is dwindled as far as possible, after dwindling, be convenient to erect in tunnel, after erecting, the main reinforcement between joint and joint is around strutted to tunnel, make it meet design size requirement, Ran Hou Give bolt applies definite moment of torsion, thereby reaches certain pretightning force, longitudinally connecting between bow member, make it to become grid-like again.
Operating principle of the present invention is: in the time that the suffered axial force of reinforcing bar reaches certain value, the connecting portion of main reinforcement produces relative sliding, makes grille frame realize contracting moving, avoids support to occur buckling failure and loses efficacy, and guarantees that tunnel or tunnel are in good state.
Operating principle and the advantage of the yieldable grille frame of the present invention are: when pressure from surrounding rock or distortion are when larger, the connecting portion of main reinforcement produces relative sliding, it is moving that grille frame is realized contracting, avoids support to occur buckling failure and lost efficacy, and guarantees that tunnel or tunnel are in good state.Compared with other metal collapsible timbering, have that steel consumption is little, cost is low, weight support frame is light, transportation and the advantage such as easy for installation.The moving critical internal force (axle power and moment of flexure) of contracting can carry out Artificial Control simultaneously.
Accompanying drawing explanation
Fig. 1 is the yieldable grille frame structure chart of straight leg Semicircular arched;
Fig. 2 is the I portion enlarged drawing of Fig. 1;
Fig. 3 is the A-A enlarged drawing of Fig. 2;
Fig. 4 is the enlarged drawing of reinforcing bar clasp.
Marginal data: 1-canopy leg; 2-arched girder; 3-reinforcing bar clasp; 4-main reinforcement; 5-dowel; 6-clamping plate; 7-connecting pin; 8-bolt; 9-stirrup.
The specific embodiment
As Figure 1-4, contractibility grille frame of the present invention is the monomer bow member being welded with main reinforcement 4 and stirrup 9, wherein, monomer bow member is made up of some joints, and joint is connected with the bracket clamp cable that main reinforcement 4 use between saving are no less than (in figure take as example); The structure of described bracket clamp cable is, with the upper reinforcing bar clasp 3 identical with grille frame main reinforcement 4 quantity of dowel 5 welding, reinforcing bar clasp 3 is formed by two clamping plates 6 use connecting pins 7 and bolt 8 docking, the interface of clamping plate 6 is provided with two circular holes, insert circular hole from both sides by the main reinforcement of two joints 4 respectively by two circular holes, and apply certain pretightning force by bolt 8.
The shape of monomer bow member can be designed to circle, the shape of a hoof, straight leg arch according to drift section shape.Fig. 1 only draws straight leg arch, and the monomer bow member of straight leg arch is made up of canopy leg 1 and arched girder 2.
Claims (3)
1. a contractibility grille frame, comprises the monomer bow member being welded with main reinforcement and stirrup, it is characterized in that, monomer bow member is made up of more piece, and the main reinforcement between joint and joint is connected with the bracket clamp cable that is no less than; The structure of described bracket clamp cable is, with the upper reinforcing bar clasp identical with grille frame main reinforcement quantity of dowel welding, reinforcing bar clasp is formed with connecting pin and bolt docking by two clamping plates, the interface of clamping plate is provided with two circular holes, from both sides, the main reinforcement of two joints is inserted circular hole respectively by two circular holes, and apply certain pretightning force by bolt.
2. contractibility grille frame as claimed in claim 1, is characterized in that, monomer bow member be shaped as circle, the shape of a hoof or straight leg arch.
3. the using method of contractibility grille frame as claimed in claim 1 or 2, is characterized in that, monomer bow member is chamber experiment first by experiment before installing, and the size of the bolt of experiment reinforcing bar clasp makes bolt torque meet the axial force of the supports before grille frame contracting is moved; When monomer bow member is installed, main reinforcement between the joint of monomer bow member and joint is inserted circular hole from bracket clamp cable both sides respectively, connect into blank, and the section configuration of monomer bow member is dwindled as far as possible, after dwindling, be convenient to erect in tunnel, after erecting, the main reinforcement between joint and joint is around strutted to tunnel, make it meet design size requirement, Ran Hou Give bolt applies definite moment of torsion, thereby reaches certain pretightning force, longitudinally connecting between bow member, make it to become grid-like again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210141901.3A CN102678137B (en) | 2012-04-28 | 2012-04-28 | Flexible grille support and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210141901.3A CN102678137B (en) | 2012-04-28 | 2012-04-28 | Flexible grille support and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102678137A CN102678137A (en) | 2012-09-19 |
| CN102678137B true CN102678137B (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210141901.3A Expired - Fee Related CN102678137B (en) | 2012-04-28 | 2012-04-28 | Flexible grille support and application method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN102678137B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3168815A (en) * | 1958-08-16 | 1965-02-09 | Bochumer Eisen Heintzmann | Arched mine gallery support and beam therefor |
| CN202560247U (en) * | 2012-04-28 | 2012-11-28 | 山东科技大学 | Contractible grating support |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010022494A1 (en) * | 2008-08-26 | 2010-03-04 | Mc Nally Michael P | Tunnel roof supporting structure |
| KR101213675B1 (en) * | 2010-08-24 | 2012-12-18 | 주식회사 픽슨이앤씨 | Prefabricate tunnel using wave type steel plate |
-
2012
- 2012-04-28 CN CN201210141901.3A patent/CN102678137B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3168815A (en) * | 1958-08-16 | 1965-02-09 | Bochumer Eisen Heintzmann | Arched mine gallery support and beam therefor |
| CN202560247U (en) * | 2012-04-28 | 2012-11-28 | 山东科技大学 | Contractible grating support |
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| Publication number | Publication date |
|---|---|
| CN102678137A (en) | 2012-09-19 |
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