CN202560247U - Contractible grating support - Google Patents
Contractible grating support Download PDFInfo
- Publication number
- CN202560247U CN202560247U CN2012202023659U CN201220202365U CN202560247U CN 202560247 U CN202560247 U CN 202560247U CN 2012202023659 U CN2012202023659 U CN 2012202023659U CN 201220202365 U CN201220202365 U CN 201220202365U CN 202560247 U CN202560247 U CN 202560247U
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- CN
- China
- Prior art keywords
- support
- contractible
- main reinforcement
- bow member
- circular holes
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- Withdrawn - After Issue
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Abstract
The utility model discloses a contractible grating support which comprises a single-body arch frame formed by welding of main steel bars and hooping, wherein the single-body arch frame is formed by a plurality of sections, and the main steel bars between the sections are connected through no less than one support clamping cable. The support clamping cables are in the structure that link steel bars are welded with steel bar buckles with the same quantity as the main steel bars of the grating support, the steel bar buckles are formed by abutting joint of two clamping plates through connecting pins and bolts, the abutting surface of the clamping plates is provided with two circular holes, two sections of the main steel bars are inserted into the circular holes through the two circular holes, and the pretightening force is exerted through the bolts. Compared with other metal contractible supports, the contractible grating support has the advantages of being small in steel consumption, low in cost, light in weight of the support, and convenient to transport and install; and at the same time, the contractible critical internal force can be manually controlled.
Description
Technical field
The utility model 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 the suitable for surrounding rock distortion, generally adopt U shaped steel collapsible timbering at present, shape is commonly the semicircle arch, is made up of arched girder and leg post, and syllogic and four-part form are arranged.During installation, if four-part form then at first is to combine arched girder, utilize then forestope the arch roof beam structure on top board, help to dig needling two again, perpendicular leg post is locked leg post and arched girder with the card cable again, constitutes one, two of front and back connect with pull bar.Support produces and contracts when pressure from surrounding rock arrives certain value, 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 that steel consumption is big, cost is high, weight is big, shortcomings such as transportation and inconvenient installation.
The grid bow member is a kind of rack form that is widely used in tunnel support in recent years; The grid bow member is welded with main reinforcement and stirrup; General bow member is the monomer bow member, for the stability of bow member or the specific (special) requirements of supporting, vertically connecting between the bow member; Make it to become grid-like, so be called the grid bow member.Because the grid bow member belongs to the rigidity supporting, incompressible, when pressure from surrounding rock or distortion were big, de-stabilise such as flexing appears in this support easily to be destroyed and causes stent failure.
The utility model content
The problem that de-stabilise such as flexing destroys occurs in order to solve when pressure from surrounding rock or distortion are big support, the utility model provides a kind of yieldable grid support that has.
A kind of contractibility grid support comprises the monomer bow member that is welded with main reinforcement and stirrup, it is characterized in that the monomer bow member is made up of some joints, and joint uses the bracket clamp cable that is no less than to be connected with the main reinforcement between the joint; The structure of described bracket clamp cable is; Go up and the identical reinforcing bar clasp of grid support main reinforcement quantity with the dowel welding; The reinforcing bar clasp is formed with connecting pin and bolt butt joint by two clamping plates; The interface of clamping plate is provided with two circular holes, inserts the circular hole from both sides with the main reinforcement of two joints respectively through two circular holes, and applies certain pretightning force through bolt.
The shape of monomer bow member can be designed to circle, the shape of a hoof, straight leg arch according to the drift section shape.
The contract method for using of personality grid support of the utility model is, at first by laboratory experiment, the size of the bolt of experiment reinforcing bar clasp made bolt torque meet the grid support preceding axial force of the supports that contracts before the monomer bow member was installed; When the monomer bow member is installed, the joint of monomer bow member and the main reinforcement between the joint are inserted the 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, and to be convenient in the tunnel, erect after dwindling, the main reinforcement between will saving and save after erecting struts around the tunnel; Make it meet the design size requirement, apply definite moment of torsion to bolt then, thereby reach certain pretightning force; Vertically connecting between the bow member, make it to become grid-like again.
The operating principle of the utility model is: when the suffered axial force of reinforcing bar reaches certain value; The connecting portion of main reinforcement produces relatively and slides; Make the grid support realize contracting, avoid support buckling failure to occur and lost efficacy, guarantee that tunnel or tunnel are in good state.
The operating principle and the advantage of the yieldable grid support of the utility model are: when pressure from surrounding rock or distortion are big; The connecting portion of main reinforcement produces relatively and slides; The grid support is realized contracting, avoids support buckling failure to occur and loses efficacy, and guarantees that tunnel or tunnel are in good state.Compare with other metal collapsible timbering, have that steel consumption is little, cost is low, weight support frame is light, transportation and advantage such as easy for installation.The critical internal force that contracts simultaneously (axle power and moment of flexure) can carry out Artificial Control.
Description of drawings
Fig. 1 is the structure chart of straight leg semicircle arch contractibility grid support;
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; The 2-arched girder; 3-reinforcing bar clasp; The 4-main reinforcement; The 5-dowel; The 6-clamping plate; The 7-connecting pin; The 8-bolt; The 9-stirrup.
The specific embodiment
Shown in Fig. 1-4; The contractibility grid support of the utility model is the monomer bow member that is welded with main reinforcement 4 and stirrup 9; Wherein, the monomer bow member is made up of some joints, and the bracket clamp cable that joint and main reinforcement 4 usefulness between saving are no less than (among the figure be example with) is connected; The structure of described bracket clamp cable is; Go up and the identical reinforcing bar clasp 3 of grid support main reinforcement 4 quantity with dowel 5 welding; 8 butt joints form reinforcing bar clasp 3 with bolt by two clamping plates 6 usefulness connecting pins 7; The interface of clamping plate 6 is provided with two circular holes, inserts the circular hole from both sides with the main reinforcement 4 of two joints respectively through two circular holes, and applies certain pretightning force through bolt 8.
The shape of monomer bow member can be designed to circle, the shape of a hoof, straight leg arch according to the drift section shape.Fig. 1 straight leg arch of only drawing, the monomer bow member of straight leg arch is made up of canopy leg 1 and arched girder 2.
Claims (2)
1. a contractibility grid support comprises the monomer bow member that is welded with main reinforcement and stirrup, it is characterized in that the monomer bow member is made up of more piece, and joint uses the bracket clamp cable that is no less than to be connected with the main reinforcement between the joint; The structure of described bracket clamp cable is; Go up and the identical reinforcing bar clasp of grid support main reinforcement quantity with the dowel welding; The reinforcing bar clasp is formed with connecting pin and bolt butt joint by two clamping plates; The interface of clamping plate is provided with two circular holes, inserts the circular hole from both sides with the main reinforcement of two joints respectively through two circular holes, and applies certain pretightning force through bolt.
2. contractibility grid support as claimed in claim 1 is characterized in that, the monomer bow member be shaped as circle, the shape of a hoof or straight leg arch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202023659U CN202560247U (en) | 2012-04-28 | 2012-04-28 | Contractible grating support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202023659U CN202560247U (en) | 2012-04-28 | 2012-04-28 | Contractible grating support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202560247U true CN202560247U (en) | 2012-11-28 |
Family
ID=47209911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202023659U Withdrawn - After Issue CN202560247U (en) | 2012-04-28 | 2012-04-28 | Contractible grating support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202560247U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678137A (en) * | 2012-04-28 | 2012-09-19 | 山东科技大学 | Flexible grille support and application method thereof |
-
2012
- 2012-04-28 CN CN2012202023659U patent/CN202560247U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678137A (en) * | 2012-04-28 | 2012-09-19 | 山东科技大学 | Flexible grille support and application method thereof |
| CN102678137B (en) * | 2012-04-28 | 2014-07-02 | 山东科技大学 | Flexible grille support and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121128 Effective date of abandoning: 20140702 |
|
| RGAV | Abandon patent right to avoid regrant |