CN207647522U - A kind of reusable telescopic interim steelframe inverted arch structure - Google Patents

A kind of reusable telescopic interim steelframe inverted arch structure Download PDF

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Publication number
CN207647522U
CN207647522U CN201721734834.0U CN201721734834U CN207647522U CN 207647522 U CN207647522 U CN 207647522U CN 201721734834 U CN201721734834 U CN 201721734834U CN 207647522 U CN207647522 U CN 207647522U
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China
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arch
steel
interim
shelf
inverted arch
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CN201721734834.0U
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Inventor
韩常领
李宗平
夏才初
徐晨
董长松
张钊
王兴刚
姚铁峰
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CCCC First Highway Consultants Co Ltd
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CCCC First Highway Consultants Co Ltd
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Abstract

The utility model is related to a kind of reusable telescopic interim steelframe inverted arch structures, including laterally recessed interim inverted arch steel arch-shelf;It is disconnected in the middle part of interim inverted arch steel arch-shelf and is fixedly installed interim steel arch-shelf jack connector;Interim inverted arch steel arch-shelf both ends are connected to just Zhi Yongjiu steel arch-shelfs by channel steel.The utility model solves to build in weak surrounding rock, collapsible loess, expansive rock and high-ground stress area and cannot form enclosed construction in tunneling process in time, lead to that Supporting Structure deformation is excessive, problems of crack, be conducive to Tunnel and close cyclization as early as possible, and repeatable utilization, it is convenient for disassembly and assembly, it is cost-effective.

Description

A kind of reusable telescopic interim steelframe inverted arch structure
Technical field
The utility model belongs to technical field of tunnel construction, and in particular to a kind of reusable telescopic interim steelframe Inverted arch structure.
Background technology
In weak surrounding rock, collapsible loess, expansive rock especially high ground stress soft rock stress constructing tunnel, general country rock and branch Protection structure deformation ratio is larger, it may appear that supporting cracking invades the case where limit is even caved in, and needs to change arch after invading limit, construction risk increases. Processing method common at present is to set lock foot anchoring stock at step excavation and arch springing thus(Pipe)With the interim inverted arch of setting, set Anchor pole(Pipe)It is larger to the disturbance of country rock, have an impact to rock integrity, is used when deflection is not very big.Interim inverted arch one As be made of grid steel frame or shaped steel arch, connection reinforcing bar and pneumatically placed concrete or form concrete, with the main timely shape of hole supporting At enclosed construction, the deformation of steel arch-shelf and country rock is controlled;But this inverted arch disturbed in demolishing process it is larger, control it is bad can It can make to have done supporting cracking, and cannot reuse, cause prodigious waste, speed of application is slower.
The country also proposed interim steelframe inverted arch at present, but the interim steelframe of these inverted arch is bolted in first Zhi Gang On arch, because pressure from surrounding rock is larger, the shear stress of screwed joint is larger, and when dismounting is difficult to unload, therefore interim steel arch-shelf is once It installs and is difficult to unload again, can only slice off, steelframe end can be made to damage, if steelframe end need to be repaiied by reusing It is multiple.Therefore surrouding rock deformation and supporting sedimentation how are achieved effective control, ensures that supporting construction is reliable and stable, easy for construction, expense It is low, become urgent problem in construction.
Invention content
The purpose of this utility model is to provide a kind of reusable telescopic interim steelframe inverted arch structure, can effectively control Country rock and Supporting Structure deformation processed make tunnel form enclosed construction in time, ensure construction safety.
Technical solution used by the utility model is:
A kind of reusable telescopic interim steelframe inverted arch structure, it is characterised in that:
Including laterally recessed interim inverted arch steel arch-shelf;
It is disconnected in the middle part of interim inverted arch steel arch-shelf and is fixedly installed interim steel arch-shelf jack connector;
Interim inverted arch steel arch-shelf both ends are inserted into channel steel, are connect with first Zhi Yongjiu steel arch-shelfs.
Interim steel arch-shelf jack connector includes channel steel casing, bolt slot and bolt, is extension type thousand in channel steel casing Jin apical grafting head, extension type jack connector both ends are bolted with interim inverted arch steel arch-shelf.
Interim inverted arch steel arch-shelf both ends are connected to just Zhi Yongjiu steel arch-shelfs by channel steel, and Open Side Down and first Zhi Yongjiu for channel steel Steel arch-shelf is welded to each other, and covers interim inverted arch steel arch-shelf end.
It is provided with I-steel diagonal brace above channel steel and just between Zhi Yongjiu steel arch-shelfs, forms spigot-and-socket joint.
Interim inverted arch steel arch-shelf bottom setting prevents the steel plate that country rock floats.
The utility model has the following advantages:
1. by the way that interim inverted arch is arranged, can effective deformation controlling for rock surrounding gateways, control the development of country rock plastic circle, the invention device It can reuse, it is cost-effective, and interim steelframe is easy to loading and unloading, convenient for construction.
2. just being used between Zhi Yongjiu steel arch-shelfs and i shaped steel diagonal brace, channel steel in the utility model and being formed by welding spigot-and-socket Connector, interim inverted arch steel arch-shelf are directly protruding into the groove of back-off channel steel, are formed enclosed construction with permanent steel arch-shelf, are not needed It is bolted or welds, it is easy to disassemble.
3. in the horizontal direction, a small-size jack is arranged in the middle of every interim steel arch-shelfs of a Pin, composition is scalable Formula connector makes interim steel arch-shelf be in close contact with permanent steel arch-shelf, while providing branch in the horizontal direction by jack pressurization Counter-force is protected, the bearing capacity of interim steelframe is improved.
4. this interim inverted arch structure can effectively avoid soft in weak surrounding rock, collapsible loess, expansive rock especially high-ground stress Supporting construction caused by rock section excessive deformation cracks, invades limit, arch changes phenomena such as even caving in;Country rock and branch can effectively be controlled Protection structure deforms, and forms enclosed construction in time, ensures construction safety.
Description of the drawings
Fig. 1 is the interim inverted arch structural schematic diagram of top bar.
Fig. 2 is the connecting portion between interim steelframe inverted arch and permanent steelframe.
Fig. 3 is extension type jack connector(Casing containing channel steel).
Fig. 4 is interim inverted arch bell and spigot joint drawing.
Fig. 5 is the interim inverted arch dismounting schematic diagram of top bar.
Fig. 6 is the interim inverted arch dismounting schematic diagram of middle step.
In figure, the first Zhi Yongjiu steel arch-shelfs of 1-;2- I-steel diagonal braces;3- channel steels;The interim inverted arch steel arch-shelfs of 4-;5- steel plates;6- Interim steel arch-shelf jack connector;6a- extension type jack connectors;6b- channel steel casings;6c- bolt slots and bolt;7- cores The part that native top is emptied.
Specific implementation mode
The utility model is described in detail With reference to embodiment.
The utility model is related to a kind of reusable telescopic interim steelframe inverted arch structure, including laterally recessed face When inverted arch steel arch-shelf 4.Interim 4 both ends of inverted arch steel arch-shelf are connected to just Zhi Yongjiu steel arch-shelfs 1 by channel steel 3.Interim inverted arch steel arch 4 middle part of frame disconnects and is fixedly installed interim steel arch-shelf jack connector 6.
Interim steel arch-shelf jack connector 6 includes channel steel casing 6b, and channel steel casing 6b is made of the channel steel to interlock up and down, profit Interim steelframe is linked to be entirety with the bolt slot and bolt 6c that are installed in preformed groove.It is very heavy for extension type in channel steel casing 6b Apical grafting head 6a, the extension type jack both ends connector 6a are bolted with interim inverted arch steel arch-shelf 4.Utilize interim steel arch-shelf Jack connector 6 makes interim inverted arch steel arch-shelf 4 connect with first Zhi Yongjiu steel arch-shelfs 1, forms telescopic joint, and can provide phase The support force answered.
Interim 4 both ends of inverted arch steel arch-shelf are connected to just Zhi Yongjiu by the anchor tip that channel steel 3 and I-steel diagonal brace 2 form Steel arch-shelf 1.Open Side Down is welded to each other with first Zhi Yongjiu steel arch-shelfs 1 for channel steel 3, and covers interim 4 end of inverted arch steel arch-shelf.Channel steel It is provided with I-steel diagonal brace 2 between 3 tops and just Zhi Yongjiu steel arch-shelfs 1, is formed and does not have to the fixed spigot-and-socket joint of bolt.
The 4 bottom setting of interim inverted arch steel arch-shelf prevents the steel plate 5 that country rock floats, and improves interim inverted arch holistic resistant behavior, A closed supporting structure system is formed with branch steelframe at the beginning of interim inverted arch arch, main hole.
After interim 4 installation forming of inverted arch steel arch-shelf, it is laid with dregs and forms workbench;Temporary steel is unclamped after the completion of to be onstructed Arch jack connector 6, as bench excavation unloads interim inverted arch steel arch-shelf 4, by channel steel 3, I-steel before multiple pneumatically placed concrete Diagonal brace 2 slices off, interim inverted arch steel arch-shelf 4 and steel plate 5 are reused forward.
Work progress:
When installation, first channel steel 3, I-steel diagonal brace 2 are welded on just Zhi Yongjiu steel arch-shelfs 1, forming channel steel 3, Open Side Down Spigot-and-socket joint device.After bench excavation bottom surface is formed, steel plate 5 is first placed, one layer of temporary backing is equivalent to, prevents on country rock It is floating, improve interim inverted arch holistic resistant behavior.Interim 4 both sides end of inverted arch steel arch-shelf is stretched into the groove of channel steel 3, and spiral shell is not necessarily to It tethers and connects or weld.In the horizontal direction, a small-sized extension type is arranged in the middle of the interim inverted arch steel arch-shelfs of every Pin 4 Jack connector 6a, the extension type jack both ends connector 6a are connected by screw bolts with interim 4 end of inverted arch steel arch-shelf, and composition can Telescoping joint.Channel steel the casing 6b, channel steel casing 6b to interlock up and down and interim is installed at extension type jack connector 6a Reserved bolt slot on 4 end of inverted arch steel arch-shelf.It is pressurizeed by extension type jack connector 6a, makes to stretch into facing in channel steel 3 When inverted arch steel arch-shelf 4 be in close contact with first Zhi Yongjiu steel arch-shelfs 1, and drag is provided, then by bolt slot and bolt 6c by slot Steel sleeve 6b connect and fixes with interim inverted arch steel arch-shelf 4, completes interim inverted arch steel arch-shelf 4 and installs, backfill dregs, forms work Platform carries out construction operation.
When dismounting, step or the rock for both sides of getting out of a predicament or an embarrassing situation in digging first(Soil)Body removes the steel plate 5 at the place that fallen through, stays centre Core Soil.When tearing interim inverted arch steel arch-shelf 4 open, bolt pine will be first connected at the channel steel casing 6b of extension type jack connector 6a It opens, and jack 6a is unclamped into release, discharge the extruding force between interim inverted arch steel arch-shelf 4 and just Zhi Yongjiu steel arch-shelfs 1, then 20-30cm is emptied on intercalated nucleus cubsoil top, interim inverted arch steel arch-shelf 4 is gently pressed downward with hook machine, disengages it from channel steel 3, by It is not connected by screw bolts or welds between interim inverted arch steel arch-shelf 4 and just Zhi Yongjiu steel arch-shelfs 1, interim inverted arch steel arch-shelf 4 It dismantles very convenient.The channel steel 3 of welding, I-steel diagonal brace 2 are sliced off.The dismounting of interim steelframe inverted arch finishes.Gunite concrete, shape At the first branch structure of closure.Interim inverted arch steel arch-shelf 4, steel plate 5, extension type jack connector 6a, the channel steel casing 6b unloaded It can continue to reuse.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are new by reading this practicality Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model Cover.

Claims (5)

1. a kind of reusable telescopic interim steelframe inverted arch structure, it is characterised in that:
Including laterally recessed interim inverted arch steel arch-shelf(4);
Interim inverted arch steel arch-shelf(4)Middle part disconnects and is fixedly installed interim steel arch-shelf jack connector(6);
Interim inverted arch steel arch-shelf(4)Channel steel is inserted at both ends(3)It is interior, with first Zhi Yongjiu steel arch-shelfs(1)Connection.
2. the reusable telescopic interim steelframe inverted arch structure of one kind according to claim 1, it is characterised in that:
Interim steel arch-shelf jack connector(6)Including channel steel casing(6b), bolt slot and bolt(6c), channel steel casing(6b)It is inside Extension type jack connector(6a), extension type jack connector(6a)Both ends and interim inverted arch steel arch-shelf(4)Pass through bolt Connection.
3. the reusable telescopic interim steelframe inverted arch structure of one kind according to claim 1, it is characterised in that:
Interim inverted arch steel arch-shelf(4)Both ends pass through channel steel(3)It is connected to just Zhi Yongjiu steel arch-shelfs(1), channel steel(3)Open Side Down with First Zhi Yongjiu steel arch-shelfs(1)It is welded to each other, and covers interim inverted arch steel arch-shelf(4)End.
4. the reusable telescopic interim steelframe inverted arch structure of one kind according to claim 1, it is characterised in that:
Channel steel(3)Top and first Zhi Yongjiu steel arch-shelfs(1)Between be provided with I-steel diagonal brace(2), form spigot-and-socket joint.
5. the reusable telescopic interim steelframe inverted arch structure of one kind according to claim 1, it is characterised in that:
Interim inverted arch steel arch-shelf(4)Bottom setting prevents the steel plate that country rock floats(5).
CN201721734834.0U 2017-12-13 2017-12-13 A kind of reusable telescopic interim steelframe inverted arch structure Active CN207647522U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109882207A (en) * 2019-03-28 2019-06-14 中铁十六局集团第一工程有限公司 The interim horizontal support in double -side approach tunnel, support device and its assembly, method for dismounting
CN110259483A (en) * 2019-07-17 2019-09-20 中铁上海工程局集团华海工程有限公司 The adjustable interim inverted arch steelframe installation structure of one kind and construction method
CN112145196A (en) * 2020-09-30 2020-12-29 中铁二十局集团有限公司 Tunnel inverted arch structure and construction method thereof
CN112160771A (en) * 2020-11-06 2021-01-01 湖南五新模板有限公司 Upward-floating-prevention overhead arch formwork system
CN112696212A (en) * 2020-12-31 2021-04-23 中铁二院工程集团有限责任公司 Compressible tunnel bottom structure for inhibiting tunnel bottom bulging and construction method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109882207A (en) * 2019-03-28 2019-06-14 中铁十六局集团第一工程有限公司 The interim horizontal support in double -side approach tunnel, support device and its assembly, method for dismounting
CN110259483A (en) * 2019-07-17 2019-09-20 中铁上海工程局集团华海工程有限公司 The adjustable interim inverted arch steelframe installation structure of one kind and construction method
CN112145196A (en) * 2020-09-30 2020-12-29 中铁二十局集团有限公司 Tunnel inverted arch structure and construction method thereof
CN112160771A (en) * 2020-11-06 2021-01-01 湖南五新模板有限公司 Upward-floating-prevention overhead arch formwork system
CN112696212A (en) * 2020-12-31 2021-04-23 中铁二院工程集团有限责任公司 Compressible tunnel bottom structure for inhibiting tunnel bottom bulging and construction method

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