CN104047619B - The steel grating bow member of size adjustable and construction method thereof - Google Patents

The steel grating bow member of size adjustable and construction method thereof Download PDF

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Publication number
CN104047619B
CN104047619B CN201410251336.5A CN201410251336A CN104047619B CN 104047619 B CN104047619 B CN 104047619B CN 201410251336 A CN201410251336 A CN 201410251336A CN 104047619 B CN104047619 B CN 104047619B
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China
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connection
subsegment
arc
arc grid
fixed
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CN104047619A (en
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陈晓江
章梦捷
黄东军
余雪松
沈明
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Co Ltd Of China Hydropower Advisory Group East China Survey Design Academe
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Co Ltd Of China Hydropower Advisory Group East China Survey Design Academe
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Abstract

The present invention relates to steel grating bow member and the construction method thereof of a kind of size adjustable.It is an object of the invention to provide a kind of easy for installation, be connected firmly, the steel grating bow member of lower-cost size adjustable and construction method thereof, with by simple and effective method, make bow member be close to the excavation end face backbreak, play the effect of strengthening supporting.The technical scheme is that the steel grating bow member of a kind of size adjustable, it is characterized in that: formed a circle by fixed connection structure and collapsible connection structure by some Arc grid subsegments and be close to excavate the steel grating bow member of end face, described fixed connection structure pieces together T font structure for being respectively welded the angle steel being fixed on adjacent two Arc grid subsegment ends by two pieces, and two angle steel are fixed through bolt attaching nut;Described collapsible connection structure includes the some connection reinforcing bars connecting adjacent two Arc grid subsegments, connects reinforcing bar and strengthens stirrup reinforcement by connection through linkage section, and described connection reinforcing bar is welded and fixed with the Arc grid subsegment at two ends.

Description

The steel grating bow member of size adjustable and construction method thereof
Technical field
The present invention relates to steel grating bow member and the construction method thereof of a kind of size adjustable.It is applicable to carry out lattice The underground engineering of excavation face need to be close to by the cavern of grid bow member supporting, the especially poor bow member of wall rock condition.
Background technology
In wall rock condition poor hole section, digging process inevitably there will be certain phenomenon of backbreaking, special It not the hole section grown at structural plane, easily cause backbreaking of large-size.Now generally use the lattice closed Grid bow member carries out system supporting.The general sectional form using rule of design of current grillage, now encircles The size of frame is rule and fixing, and when the ratio of backbreaking of tunnel is when more serious, exists for bow member with tunnel not The situation of coupling, it is impossible to play expected supporting effect.
Content of the invention
The technical problem to be solved in the present invention is: for the problem of above-mentioned existence, provide a kind of easy for installation, Be connected firmly, the steel grating bow member of lower-cost size adjustable and construction method thereof, with by simple and effective Method, make bow member be close to the excavation end face backbreak, play the effect of strengthening supporting.
The technical solution adopted in the present invention is: the steel grating bow member of a kind of size adjustable, it is characterised in that: Formed a circle by fixed connection structure and collapsible connection structure by some Arc grid subsegments and be close to excavate end The steel grating bow member in face, described fixed connection structure is fixed on adjacent two Arc grids for being respectively welded by two pieces The angle steel of subsegment end pieces together T font structure, and two angle steel are fixed through bolt attaching nut;Described scalable Attachment structure includes the some connection reinforcing bars connecting adjacent two Arc grid subsegments, connects reinforcing bar and adds through linkage section Strong stirrup reinforcement by connection, described connection reinforcing bar is welded and fixed with the Arc grid subsegment at two ends.
Described Arc grid subsegment is made up of the main muscle of two arc-like inner band and the main muscle of two arc-like outer band, institute State main muscle and pass through grid subsegment stirrup reinforcement by connection, be connected through grid subsegment abdomen muscle between the main muscle of inside and outside circle.
Described collapsible connection structure includes that linkage section strengthens abdomen muscle, and this linkage section is strengthened abdomen muscle and connected outer ring master Muscle and the main muscle of inner ring in adjacent Arc grid subsegment.
The method of the steel grating bow member of size adjustable of the present invention, comprises the following steps that
A, processing factory make Arc grid subsegment, are allowed to the bow member matching with design section that can form a circle, And in Arc grid subsegment, weld angle steel;
B, by the transport of each Arc grid subsegment in cavern, use lock waist lock foot anchoring stock by the beginning of Arc grid subsegment Step is fixed in excavation face;
C, be fixedly connected access node structure, uses screw bolt and nut by the Bolted angle connection of adjacent two Arc grid subsegments;
D, adjustment Arc grid subsegment position are allowed to be close to crag as far as possible;
E, employing collapsible connection structure connect the Arc grid subsegment not yet connecting, by being welded to connect reinforcing bar Making telescopic Arc grid subsegment be connected, the linkage section of construction collapsible connection structure strengthens abdomen muscle and connection Duan Jiaqiang stirrup;
F, as stated above make many Pin steel grating bow member and with longitudinally connected muscle interconnect;
G, pneumatically placed concrete strengthen the supporting of steel grating bow member.
The invention has the beneficial effects as follows: the present invention passes through fixed connection structure and collapsible connection structure connects arc Shape grid subsegment formed close steel grating so that it is be close to crag as far as possible, by effective, simply adjust lattice The connected mode of grid bow member, makes each face of bow member and the excavated section backbreak touch, successfully solves at country rock Poor, the problem of more hole section grillage supporting of backbreaking, is that the benefit of bow member supporting provides safe and reliable Guarantee.
Brief description
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of Arc grid subsegment in the present invention.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the structure chart of fixed connection structure in the present invention.
Fig. 5 is the structure chart of collapsible connection structure in the present invention.
Detailed description of the invention
As it is shown in figure 1, the present embodiment and can be stretched by fixed connection structure 2 by 8 Arc grid subsegments 1 Contracting attachment structure 3 connects into steel grating bow member (fixed connection structure and a collapsible connection structure closed Quantity arrange flexibly according to field condition), steel grating bow member be close to excavation end face arrange.
As shown in Figure 2 and Figure 3, in the present embodiment Arc grid subsegment 1 by two masters being arranged in arc-like inner band Muscle 4 and two main muscle 4 being arranged in arc-like outer band form, and four main muscle 4 are by grid subsegment stirrup 6 even Connect reinforcing, be 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 being pieced together T font structure by two blocks of angle steel 7, and two angle steel 7 are through spiral shell Bolt attaching nut is fixed, and two angle steel of T font structure are respectively welded and are fixed on adjacent two Arc grid subsegments 1 End (see Fig. 4), wherein angle steel 7 will be welded in Arc grid subsegment 1, screw bolt and nut in advance in factory On-the-spot stubborn solid.
As it is shown in figure 5, collapsible connection structure 3 includes connecting adjacent two Arc grid subsegments 1 in this example Some connection reinforcing bars 8, are existed between the two Arc grid subsegments 1 being connected by collapsible connection structure 3 in this example Gap, can connect reinforcing bar 8 length adjustment gap length by adjusting, connect the arc lattice of reinforcing bar 8 and two ends Grid subsegment 1 Site Welding is fixed.For strengthening the rigidity of collapsible connection structure, linkage section is used to strengthen abdomen muscle 10th, linkage section is strengthened stirrup 9 and is carried out reinforcement.Connect and connected by linkage section reinforcement stirrup 9 between reinforcing bar 8 Reinforcing, Arc grid subsegment 1 Site Welding connecting reinforcing bar 8 with two ends is fixed.In Arc grid subsegment 1 The main muscle 4 being positioned at arc-like inner band by linkage section strengthen abdomen muscle 10 connect in adjacent Arc grid subsegment 1 with Side the main muscle of arc-like outer band.
The construction method of the present embodiment is as follows:
A, processing factory make Arc grid subsegment 1, are allowed to the bow member matching with design section that can form a circle, And in Arc grid subsegment, weld angle steel 7;
B, transport each Arc grid subsegment 1 to cavern, use lock waist lock foot anchoring stock by Arc grid subsegment 1 is tentatively fixed in excavation face;
C, be fixedly connected access node structure 2, uses screw bolt and nut by the angle steel of adjacent two Arc grid subsegments 1 7 connect;
D, adjustment Arc grid subsegment 1 position are allowed to be close to crag as far as possible;
E, employing collapsible connection structure 3 connect the Arc grid subsegment 1 not yet connecting, by being welded to connect Reinforcing bar 8 makes telescopic Arc grid subsegment 1 be connected, and the linkage section of construction collapsible connection structure 3 is strengthened Abdomen muscle 10 and linkage section strengthen stirrup 9;
F, as stated above make many Pin steel grating bow member and with longitudinally connected muscle interconnect;
G, pneumatically placed concrete strengthen the supporting of steel grating bow member.

Claims (2)

1. the steel grating bow member of a size adjustable, it is characterised in that: by some Arc grid subsegments (1) Formed a circle by fixed connection structure (2) and collapsible connection structure (3) and be close to excavate the steel lattice of end face Grid bow member, described fixed connection structure (2) is fixed on adjacent two Arc grid subsegments for being respectively welded by two pieces (1) angle steel (7) of end pieces together T font structure, and two angle steel (7) are fixed through bolt attaching nut; Described collapsible connection structure (3) includes the some connection reinforcing bars connecting adjacent two Arc grid subsegments (1) (8), connect reinforcing bar (8) through linkage section strengthen stirrup (9) reinforcement by connection, described connection reinforcing bar (8) with The Arc grid subsegment (1) at two ends is welded and fixed;
The main muscle (4) by two arc-like inner band for the described Arc grid subsegment (1) and the master of two arc-like outer band Muscle (4) forms, and main ribs (4) passes through grid subsegment stirrup (6) reinforcement by connection, the main muscle of inside and outside circle Between through grid subsegment abdomen muscle (5) be connected;
Described collapsible connection structure (3) also includes that linkage section strengthens abdomen muscle (10), and this linkage section strengthens abdomen Muscle connects the main muscle in outer ring (4) and the main muscle of the inner ring (4) on adjacent Arc grid subsegment (1).
2. the method for the steel grating bow member of a size adjustable described in claim 1 of constructing, it is characterised in that step Rapid as follows:
A, processing factory make Arc grid subsegment (1), are allowed to the arch matching with design section that can form a circle Frame, and in Arc grid subsegment, weld angle steel (7);
B, by the transport of each Arc grid subsegment (1) in cavern, use lock waist lock foot anchoring stock by Arc grid Subsegment (1) is tentatively fixed in excavation face;
C, be fixedly connected access node structure (2), uses screw bolt and nut by adjacent two Arc grid subsegments (1) Angle steel (7) connect;
D, adjustment Arc grid subsegment (1) position are allowed to be close to crag as far as possible;
E, employing collapsible connection structure (3) connect the Arc grid subsegment (1) not yet connecting, by weldering Connecing reinforcing bar (8) in succession makes telescopic Arc grid subsegment (1) be connected, construction collapsible connection structure (3) Linkage section strengthen abdomen muscle (10) and linkage section reinforcement stirrup (9);
F, as stated above make many Pin steel grating bow member and with longitudinally connected muscle interconnect;
G, pneumatically placed concrete strengthen the supporting of steel grating bow member.
CN201410251336.5A 2014-06-06 2014-06-06 The steel grating bow member of size adjustable and construction method thereof Active CN104047619B (en)

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Publication number Priority date Publication date Assignee Title
CN106988765A (en) * 2016-12-13 2017-07-28 范玫光 High intensity grid steel frame and its manufacture method
CN106968687B (en) * 2017-04-01 2020-04-14 湖南科技大学 Closed type circular ring yielding support device and method for mining roadway of steep coal seam

Citations (6)

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Publication number Priority date Publication date Assignee Title
CN101037944A (en) * 2007-04-27 2007-09-19 惠中华 Shallow buried and underground excavated engineering project execution method and equipment thereof
CN201025038Y (en) * 2007-04-27 2008-02-20 惠中华 Adjustable pre-stress steel arch frame
CN102587936A (en) * 2012-04-01 2012-07-18 中国矿业大学 Fully-enclosed integral assembly grid concrete support method
CN202370542U (en) * 2011-11-14 2012-08-08 中建五局土木工程有限公司 Grid crown frame for underground tunnel
JP2013129985A (en) * 2011-12-21 2013-07-04 Hikari Keikaku Sekkei Jimusyo Co Ltd Seismic strengthening method with reinforced inner lining of tunnel
CN203939508U (en) * 2014-06-06 2014-11-12 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 that size is adjustable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002371798A (en) * 2001-06-15 2002-12-26 Nippon Steel Corp Steel timbering and its manufacturing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101037944A (en) * 2007-04-27 2007-09-19 惠中华 Shallow buried and underground excavated engineering project execution method and equipment thereof
CN201025038Y (en) * 2007-04-27 2008-02-20 惠中华 Adjustable pre-stress steel arch frame
CN202370542U (en) * 2011-11-14 2012-08-08 中建五局土木工程有限公司 Grid crown frame for underground tunnel
JP2013129985A (en) * 2011-12-21 2013-07-04 Hikari Keikaku Sekkei Jimusyo Co Ltd Seismic strengthening method with reinforced inner lining of tunnel
CN102587936A (en) * 2012-04-01 2012-07-18 中国矿业大学 Fully-enclosed integral assembly grid concrete support method
CN203939508U (en) * 2014-06-06 2014-11-12 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 that size is adjustable

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