CN207363681U - A kind of drag-line steel grating bow member - Google Patents
A kind of drag-line steel grating bow member Download PDFInfo
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- CN207363681U CN207363681U CN201721485022.7U CN201721485022U CN207363681U CN 207363681 U CN207363681 U CN 207363681U CN 201721485022 U CN201721485022 U CN 201721485022U CN 207363681 U CN207363681 U CN 207363681U
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Abstract
The utility model discloses a kind of drag-line steel grating bow member, it is the steel grating bow member for being close to excavation face surrounded by arc steel grating subsegment and vertical steel grating subsegment by some guy of twisted steel cable rings and subsegment connection structure；The guy of twisted steel cable ring is upper, middle and lower three parts one steel strand wires of other tensioning in arc steel grating subsegment, and connects cyclization by drag-line connection structure；The drag-line connection structure is that two angle steel are welded in non junction side on steel strand wires Three-head connector, and angle steel is equipped with a circular hole, a bolt is inserted with circular hole；The subsegment connection structure is formed by two pieces of square flange docking, and square flange is equipped with five circular holes, and four main reinforcements and a longitudinally connected muscle are inserted with circular hole.The utility model drag-line steel grating bow member steel consumption is small, overall uniform force, the advantages that installation is convenient, suitable for the preliminary bracing of mine working etc..
Description
Technical field
A kind of drag-line steel grating bow member and its construction method are the utility model is related to, belongs to coal, military project, metallurgy, friendship
The underground engineering support fields such as logical, water conservancy.
Background technology
The problems such as in order to solve land deterioration, population explosion, shortage of resources, underground engineering construction enters rapid development
Stage.During underground engineering construction, in order to relax Surrounding Rock Movement, suppress roof delamination, prevent stone from dropping, prevent side wall
Wall caving etc. to underground engineering, it is necessary to carry out supporting, one of which method for protecting support is bow member supporting.Arch support supporting contractibility
The good, large carrying capacity of energy, can effectively suppress the deformation of country rock, be widely used in the ground such as coal, military project, metallurgy, traffic, water conservancy
In lower engineering.
The arch support for mostly descending engineer application at present is steel arch-shelf.Steel arch-shelf overall stiffness is big, can provide compared with
Big early stage supporting intensity, belongs to permanent support.But in the combined supporting combined with anchor pole, bar-mat reinforcement, gunite concrete,
The combination situation of steel arch-shelf is relatively low, and in the junior underground engineering of Surrounding Rock Strength, be easy to cause the waste of steel.In order to
Overcome this shortcoming, attempt to use grillage in some underground engineerings.Grillage common at present has：
Such as：Chinese utility model patent ZL201120448709.X discloses bored tunnel grillage, the invention bag
Include at least four main reinforcements, more stirrups and reinforcing rib, main reinforcement, stirrup and reinforcing rib are welded to be formed the first pedestal bow member, in
Between bow member and the second pedestal bow member be once spliced into the arc coordinated with tunnel.The grillage has certain supporting intensity,
But overall unbalance stress, local deformation are serious in the underground engineering of country rock weak broken.
Chinese invention patent ZL201410251336.5 discloses the steel grating bow member and its construction method of size adjustable, should
Invention includes some Arc grid subsegments, subsegment connection structure and collapsible connection structure, and Arc grid subsegment is passed through subsegment
Connection structure and collapsible connection structure, which form a circle, is close to the steel grating bow member for excavating end face.The grillage size adjustable,
Each face of bow member can be made to be touched with the excavated section backbreak, but the total bearing capacity of grillage is still up for improving.
In conclusion the steel grating bow member of bored tunnel grillage and size adjustable, although strong with certain supporting
Degree, but because of overall discontinuity, locally occur large deformation cause steel grating bow member to destroy, drag-line steel grating bow member
It can solve the problems, such as that common lattice steel grid bow member entirety unbalance stress and local deformation are serious, reach the mesh for improving total bearing capacity
's.
The content of the invention
Deficiency the purpose of the utility model is to overcome existing grillage provides that a kind of steel consumption is small, cost price
It is low, supporting intensity is high, lightweight construction, speed of application are fast, the drag-line steel grating bow member of overall uniform force.Pass through the steel lattice
Grid bow member solves the problems, such as the preliminary bracing of subway tunnel, mine working etc..
A kind of construction of drag-line steel grating bow member of the utility model is：It is by arc steel grating subsegment, vertical steel lattice
Grid subsegment, guy of twisted steel cable ring and subsegment connection structure composition, it is characterised in that the arc steel grating subsegment and vertical steel
Grid subsegment is connected by two internal main reinforcements and two exterior main reinforcement compositions, four main reinforcements by stirrup, and inside and outside main reinforcement is led to
Cross reinforcing rib connection；Arc steel grating subsegment and vertical steel grating subsegment pass through some guy of twisted steel cable rings and subsegment connection structure
What is surrounded is close to the steel grating bow member of excavation face；The guy of twisted steel cable ring is the upper, middle and lower three in arc steel grating subsegment
One steel strand wires of tensioning respectively, and cyclization is connected by drag-line connection structure；The drag-line connection structure is in steel strand wires three
Two angle steel are welded on head connector non junction side, angle steel is equipped with a circular hole, a bolt is inserted with circular hole；Described
Subsegment connection structure is formed by two pieces of square flange docking, and square flange is equipped with five circular holes, and four are inserted with circular hole
Main reinforcement and a longitudinally connected muscle.
It is before steel strand wires both ends fixation is carried out, it is necessary to logical to prevent steel strand wires from producing cable sag effect under Gravitative Loads
Cross tensioner and symmetrical tensioning is carried out at the same time to the both ends of steel strand wires.
To strengthen the concatenation ability of subsegment connection structure, two eight word muscle, the intersection point of eight word muscle are welded at four main reinforcements
The position slightly center hole away from square flange, in order to penetrate longitudinally connected muscle from center hole.
A kind of construction method of drag-line steel grating bow member of the utility model is：The top of arc steel grating subsegment, in
A steel strand wires are laid in portion and lower part respectively, and steel strand wires both ends are carried out at the same time with symmetrical tensioning by tensioner, it is to be tensioned extremely
It is fixed in after design load in drag-line connection structure；Stirrup is placed in the gap in drag-line connection structure between two angle steel, is treated
Apply certain pretightning force after adjusting to suitable position by bolt；By the above method in arc steel grating subsegment key node
After locating three guy of twisted steel cable rings of tensioning, it is close to excavation face and sets up arc steel grating subsegment and vertical steel grating subsegment, will be each
Four main reinforcements of subsegment end are rolled over and correspond in insertion square flange surrounding circular hole, and apply certain pretension by bolt
Power, forms overall drag-line steel grating bow member；More Pin drag-lines steel grating bow members at square flange center hole by setting up
Longitudinally connected muscle is connected with each other, and longitudinally connected muscle is welded at eight word muscle nodes.
A kind of drag-line steel grating bow member of the utility model has the following advantages that：
(1) guy of twisted steel cable ring set, can be effective using the high characteristic of steel strand wires tensile strength on arc-shaped steel grillage
So that the overall uniform force of steel grating bow member, can effectively prevent under pressure from surrounding rock effect steel grating bow member locally occur it is excessive
Deformation；
(2) the symmetrical simultaneous tension in steel strand wires both ends, is disposably stretched to design load, saves the construction time；
(3) steel strand tension process can apply prestressing force to arc steel grating subsegment, can effectively improve steel grating bow member
Bending resistance and rigidity, increase steel grating bow member durability；
(4) arc steel grating subsegment and vertical steel grating subsegment can be spliced by subsegment connection structure, can make steel lattice
It is close to excavation face in each face of grid bow member;
(5) circular hole is equipped among square flange, longitudinally connected muscle can be penetrated by circular hole, realize more Pin drag-lines
The quick connection of steel grating bow member.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of drag-line steel grating bow member of the utility model；
Fig. 2 is the structure diagram of arc steel grating subsegment in the utility model；
Fig. 3 is A-A profiles in the utility model；
Fig. 4 is the structure diagram of drag-line connection structure in the utility model；
Fig. 5 is the structure diagram of the utility model neutron section connection structure.
Marginal data：1- arc steel grating subsegments；The vertical steel grating subsegments of 2-；3- guy of twisted steel cable rings；4- subsegments connect
Structure；5- main reinforcements；6- stirrups；7- reinforcing ribs；8- steel strand wires；9- drag-line connection structures；10- steel strand wires Three-head connectors；11- angles
Steel；12- bolts；13- square flanges；Eight word muscle of 14-；The longitudinally connected muscle of 15-.
Embodiment
A kind of drag-line steel grating bow member as shown in Figure 1 is twisted by arc steel grating subsegment 1, vertical steel grating subsegment 2, steel
Line drag-line ring 3 and subsegment connection structure 4 form, and the arc steel grating subsegment 1 and vertical steel grating subsegment 2 are by two
Portion's main reinforcement 5 and two exterior main reinforcements 5 form, and four main reinforcements 5 are connected by stirrup 6, and inside and outside main reinforcement 5 is connected by reinforcing rib 7；
Arc steel grating subsegment 1 and vertical steel grating subsegment 2 are surrounded tight by some guy of twisted steel cable rings 3 and subsegment connection structure 4
Paste the steel grating bow member of excavation face；The guy of twisted steel cable ring 3 is other of the upper, middle and lower three parts in arc steel grating subsegment 1
A steel strand wires 8 are drawn, and cyclization is connected by drag-line connection structure 9；The drag-line connection structure 9 is in three companies of steel strand wires
Two angle steel 11 of welding, angle steel 11 on 10 non junction side of device is connect to be equipped with a circular hole, a bolt 12 is inserted with circular hole；Institute
The subsegment connection structure 4 stated is docked by two pieces of square flanges 13 and formed, and square flange 13 is equipped with five circular holes, in circular hole
It is inserted with four main reinforcements 5 and a longitudinally connected muscle 15.
A kind of construction method of drag-line steel grating bow member of the utility model is：The top of arc steel grating subsegment 1,
A steel strand wires 8 are laid in middle part and lower part respectively, and symmetrical tensioning is carried out at the same time to 8 both ends of steel strand wires by tensioner, wait to open
It is fixed in after being pulled to design load in drag-line connection structure 9；Stirrup 6 is placed in drag-line connection structure 9 between two angle steel 11
Gap, it is to be adjusted to applying certain pretightning force by bolt 12 after suitable position；By the above method in arc steel grating
At 1 key node of subsegment after three guy of twisted steel cable rings 3 of tensioning, it is close to excavation face and sets up arc steel grating subsegment 1 and vertical steel
Grid subsegment 2, by four main reinforcements 5 of each subsegment end are rolled over and corresponding insertion 13 surrounding circular hole of square flange in, and lead to
Cross bolt 12 and apply certain pretightning force, form overall drag-line steel grating bow member；More Pin drag-lines steel grating bow member sides of passing through
Longitudinally connected muscle 15 is set up at 13 center hole of shape ring flange to be connected with each other, and longitudinally connected muscle weldering 15 is connected on eight word muscle, 14 node
Place.
Claims (1)
1. a kind of drag-line steel grating bow member, it be by arc steel grating subsegment, vertical steel grating subsegment, guy of twisted steel cable ring and
Subsegment connection structure forms, it is characterised in that arc steel grating subsegment and vertical steel grating subsegment pass through some guy of twisted steel cable
What ring and subsegment connection structure surrounded is close to the steel grating bow member of excavation face；The guy of twisted steel cable ring is in arc steel grating
Upper, middle and lower three parts one steel strand wires of other tensioning of subsegment, and cyclization is connected by drag-line connection structure；The drag-line connection
Structure is that two angle steel of welding, angle steel are equipped with a circular hole, a bolt are inserted with circular hole on steel strand wires Three-head connector；
The subsegment connection structure is formed by two pieces of square flange docking, and square flange is equipped with five circular holes, is inserted in circular hole
There are four main reinforcements and a longitudinally connected muscle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721485022.7U CN207363681U (en) | 2017-11-09 | 2017-11-09 | A kind of drag-line steel grating bow member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721485022.7U CN207363681U (en) | 2017-11-09 | 2017-11-09 | A kind of drag-line steel grating bow member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207363681U true CN207363681U (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721485022.7U Active CN207363681U (en) | 2017-11-09 | 2017-11-09 | A kind of drag-line steel grating bow member |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605510A (en) * | 2017-11-09 | 2018-01-19 | 山东科技大学 | A kind of drag-line steel grating bow member and its construction method |
| CN114562296A (en) * | 2022-04-06 | 2022-05-31 | 中铁第一勘察设计院集团有限公司 | Grid steel frame structure with spiral stirrups and construction method thereof |
-
2017
- 2017-11-09 CN CN201721485022.7U patent/CN207363681U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605510A (en) * | 2017-11-09 | 2018-01-19 | 山东科技大学 | A kind of drag-line steel grating bow member and its construction method |
| CN107605510B (en) * | 2017-11-09 | 2023-08-22 | 山东科技大学 | Dragline type steel grid arch frame and construction method thereof |
| CN114562296A (en) * | 2022-04-06 | 2022-05-31 | 中铁第一勘察设计院集团有限公司 | Grid steel frame structure with spiral stirrups and construction method thereof |
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