CN203939508U - The steel grating bow member that size is adjustable - Google Patents
The steel grating bow member that size is adjustable Download PDFInfo
- Publication number
- CN203939508U CN203939508U CN201420300536.0U CN201420300536U CN203939508U CN 203939508 U CN203939508 U CN 203939508U CN 201420300536 U CN201420300536 U CN 201420300536U CN 203939508 U CN203939508 U CN 203939508U
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- CN
- China
- Prior art keywords
- subsegment
- bow member
- connection structure
- grid
- arc
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model relates to the adjustable steel grating bow member of a kind of size.The purpose of this utility model be to provide a kind of easy for installation, be connected firmly, steel grating bow member that lower-cost size is adjustable, with by simple and effective method, the excavation end face that bow member is close to backbreak, plays the effect that adds strong supporting.The technical solution of the utility model is: the steel grating bow member that a kind of size is adjustable, it is characterized in that: form a circle and be close to the steel grating bow member that excavates end face by fixed connection structure and collapsible connection structure by some Arc grid subsegments, described fixed connection structure is to piece together T font structure by two blocks of angle steel that are fixedly welded on respectively adjacent two Arc grid subsegment ends, and two angle steel are fixed through bolt attaching nut; Described collapsible connection structure comprises the some connecting reinforcements that connect adjacent two Arc grid subsegments, and connecting reinforcement is strengthened stirrup reinforcement by connection through linkage section, and the Arc grid subsegment at described connecting reinforcement and two ends is welded and fixed.
Description
Technical field
The utility model relates to the adjustable steel grating bow member of a kind of size.The poor bow member of cavern, especially wall rock condition that is applicable to carry out grillage supporting need be close to the underground construction of excavation face.
Background technology
In the poor hole of wall rock condition section, in digging process, inevitably there will be certain phenomenon of backbreaking, the hole section of particularly growing at structural plane, easily causes backbreaking of large-size.Now conventionally adopt the grillage of sealing to carry out system supporting.The design of grillage at present generally adopts regular sectional form, and now the size of bow member is rule and fixing, and in the time that backbreaking of tunnel is more serious, just has the unmatched situation of bow member and tunnel, cannot play the supporting effect of expection.
Summary of the invention
The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, provide a kind of easy for installation, be connected firmly, steel grating bow member that lower-cost size is adjustable, with by simple and effective method, the excavation end face that bow member is close to backbreak, plays the effect that adds strong supporting.
The technical scheme that the utility model adopts is: the steel grating bow member that a kind of size is adjustable, it is characterized in that: form a circle and be close to the steel grating bow member that excavates end face by fixed connection structure and collapsible connection structure by some Arc grid subsegments, described fixed connection structure is to piece together T font structure by two blocks of angle steel that are fixedly welded on respectively adjacent two Arc grid subsegment ends, and two angle steel are fixed through bolt attaching nut; Described collapsible connection structure comprises the some connecting reinforcements that connect adjacent two Arc grid subsegments, and connecting reinforcement is strengthened stirrup reinforcement by connection through linkage section, and the Arc grid subsegment at described connecting reinforcement and two ends is welded and fixed.
Described Arc grid subsegment is made up of the main muscle of two arc inner rings and the main muscle of two arc outer rings, and described main muscle, by grid subsegment stirrup reinforcement by connection, is connected through grid subsegment abdomen muscle between the main muscle of inside and outside circle.
Described collapsible connection structure comprises linkage section reinforcement abdomen muscle, and this linkage section is strengthened abdomen muscle and connected the main muscle of inner ring in the main muscle in outer ring and adjacent Arc grid subsegment.
The beneficial effects of the utility model are: the utility model is connected Arc grid subsegment and forms the steel grating sealing with collapsible connection structure by fixed connection structure, make it be close to crag as far as possible, by effectively, simply adjusting the connected mode of grillage, each of bow member is touched with the excavated section of backbreaking, successfully solve poor at country rock, to backbreak the section grillage supporting of more hole problem, for the benefit of bow member supporting provides safe and reliable guarantee.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of Arc grid subsegment in the utility model.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the structure chart of fixed connection structure in the utility model.
Fig. 5 is the structure chart of collapsible connection structure in the utility model.
Detailed description of the invention
As shown in Figure 1, the present embodiment is connected into the steel grating bow member (quantity of fixed connection structure and collapsible connection structure arranges flexibly according to field condition) of a sealing by fixed connection structure 2 and collapsible connection structure 3 by 8 Arc grid subsegments 1, steel grating bow member is close to excavation end face and is arranged.
As shown in Figure 2 and Figure 3, in the present embodiment, Arc grid subsegment 1 is made up of two main muscle 4 and two main muscle 4 that are arranged in arc outer ring that are arranged in arc inner ring, four main muscle 4, by grid subsegment stirrup 6 reinforcement by connection, are connected by grid subsegment abdomen muscle 5 between the main muscle of inside and outside circle of homonymy.
In this example, fixed connection structure 2 is for to piece together T font structure by two blocks of angle steel 7, two angle steel 7 are fixed through bolt attaching nut, two angle steel of T font structure are fixedly welded on respectively adjacent two Arc grid subsegment 1 ends (seeing Fig. 4), wherein angle steel 7 will be welded in Arc grid subsegment 1 in advance in factory, and screw bolt and nut is on-the-spot twists admittedly.
As shown in Figure 5, in this example, collapsible connection structure 3 comprises the some connecting reinforcements 8 that connect adjacent two Arc grid subsegments 1, there is gap in 1 of the two Arc grid subsegment connecting by collapsible connection structure 3 in this example, can be by adjusting connecting reinforcement 8 length adjustment gap lengths, connecting reinforcement 8 is fixed with Arc grid subsegment 1 Site Welding at two ends.For strengthening the rigidity of collapsible connection structure, adopt linkage section reinforcement abdomen muscle 10, linkage section to strengthen stirrup 9 and carry out reinforcement.Between connecting reinforcement 8, strengthen stirrup 9 reinforcement by connection by linkage section, connecting reinforcement 8 is fixed with Arc grid subsegment 1 Site Welding at two ends.The main muscle 4 that is positioned at arc inner ring in Arc grid subsegment 1 by linkage section strengthen abdomen muscle 10 connect homonymy in adjacent Arc grid subsegment 1 the main muscle in arc outer ring.
The construction method of the present embodiment is as follows:
A, processing factory make Arc grid subsegment 1, the bow member that makes it to form a circle and match with design section, and in Arc grid subsegment, weld angle steel 7;
B, each Arc grid subsegment 1 is transported in cavern, adopts lock waist lock foot anchoring stock that Arc grid subsegment 1 is tentatively fixed in excavation face;
C, be connected and fixed syndeton 2, adopt screw bolt and nut that the angle steel of adjacent two Arc grid subsegments 17 is connected;
D, adjustment Arc grid subsegment 1 position make it to be close to crag as far as possible;
E, employing collapsible connection structure 3 connect the Arc grid subsegment 1 not yet connecting, and by being welded to connect reinforcing bar 8, telescopic Arc grid subsegment 1 are connected, and the linkage section of construction collapsible connection structure 3 is strengthened abdomen muscle 10 and linkage section reinforcement stirrup 9;
F, make many Pin steel grating bow member and be connected to each other with longitudinal dowel as stated above;
G, pneumatically placed concrete are strengthened the supporting of steel grating bow member.
Claims (3)
1. the steel grating bow member that size is adjustable, it is characterized in that: form a circle and be close to the steel grating bow member that excavates end face by fixed connection structure (2) and collapsible connection structure (3) by some Arc grid subsegments (1), described fixed connection structure (2) is for to piece together T font structure by two blocks of angle steel (7) that are fixedly welded on respectively adjacent two Arc grid subsegment (1) ends, and two angle steel (7) are fixed through bolt attaching nut; Described collapsible connection structure (3) comprises the some connecting reinforcements (8) that connect adjacent two Arc grid subsegments (1), connecting reinforcement (8) is strengthened stirrup (9) reinforcement by connection through linkage section, and described connecting reinforcement (8) is welded and fixed with the Arc grid subsegment (1) at two ends.
2. the adjustable steel grating bow member of size according to claim 1, it is characterized in that: described Arc grid subsegment (1) is made up of the main muscle (4) of two arc inner rings and the main muscle (4) of two arc outer rings, described main muscle (4), by grid subsegment stirrup (6) reinforcement by connection, is connected through grid subsegment abdomen muscle (5) between the main muscle of inside and outside circle.
3. the adjustable steel grating bow member of size according to claim 2, it is characterized in that: described collapsible connection structure (3) also comprises linkage section reinforcement abdomen muscle (10), this linkage section is strengthened abdomen muscle and is connected the main muscle of inner ring (4) in main muscle in outer ring (4) and adjacent Arc grid subsegment (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420300536.0U CN203939508U (en) | 2014-06-06 | 2014-06-06 | The steel grating bow member that size is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420300536.0U CN203939508U (en) | 2014-06-06 | 2014-06-06 | The steel grating bow member that size is adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203939508U true CN203939508U (en) | 2014-11-12 |
Family
ID=51858831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420300536.0U Withdrawn - After Issue CN203939508U (en) | 2014-06-06 | 2014-06-06 | The steel grating bow member that size is adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203939508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047619A (en) * | 2014-06-06 | 2014-09-17 | 中国水电顾问集团华东勘测设计研究院有限公司 | Steel grating lagging jack with adjustable size and construction method thereof |
| CN105781593A (en) * | 2016-05-13 | 2016-07-20 | 中铁四局集团第三建设有限公司 | Steel grating assisted diversion tunnel preliminary bracing structure and method |
-
2014
- 2014-06-06 CN CN201420300536.0U patent/CN203939508U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047619A (en) * | 2014-06-06 | 2014-09-17 | 中国水电顾问集团华东勘测设计研究院有限公司 | Steel grating lagging jack with adjustable size and construction method thereof |
| CN104047619B (en) * | 2014-06-06 | 2016-10-05 | 中国水电顾问集团华东勘测设计研究院有限公司 | The steel grating bow member of size adjustable and construction method thereof |
| CN105781593A (en) * | 2016-05-13 | 2016-07-20 | 中铁四局集团第三建设有限公司 | Steel grating assisted diversion tunnel preliminary bracing structure and method |
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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: 20141112 Effective date of abandoning: 20161005 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20141112 Effective date of abandoning: 20161005 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |