CN106703835B - It is a kind of at the beginning of tunnel branch construct grid steel frame exempt from weld quick assembling supporting construction - Google Patents
It is a kind of at the beginning of tunnel branch construct grid steel frame exempt from weld quick assembling supporting construction Download PDFInfo
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- CN106703835B CN106703835B CN201611236849.4A CN201611236849A CN106703835B CN 106703835 B CN106703835 B CN 106703835B CN 201611236849 A CN201611236849 A CN 201611236849A CN 106703835 B CN106703835 B CN 106703835B
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- arch
- anchor head
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 142
- 239000010959 steel Substances 0.000 title claims abstract description 142
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 238000004873 anchoring Methods 0.000 claims description 12
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000003447 ipsilateral effect Effects 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of grid steel frames constructed for branch at the beginning of tunnel to exempt to weld quick assembling supporting construction comprising along more Pin grid steel arch-shelfs that tunnel longitudinal gap is arranged, grid steel arch-shelf described in every Pin is anchored in tunnel wall by locking foot anchor tube attachment device；It is connected with each other between the adjacent grid steel arch-shelf by one-above-the-other layout.It is the configuration of the present invention is simple, easy to install and use, it is connected by assembled between grid steel arch-shelf and one-above-the-other layout, lock foot device, eliminates welding, avoid the relevant issues such as speed of application caused by welding is slow, pollute, quality is difficult to guarantee；Simultaneously by grid steel arch-shelf prewelding steel plate, and reserving hole on the steel plate, pilot hole is carried out using hole, facilitates construction.
Description
Technical field
The present invention relates to a kind of Tunnel devices, belong to constructing tunnel field of engineering technology, and in particular to a kind of
The grid steel frame constructed for branch at the beginning of tunnel exempts to weld quick assembling supporting construction.
Background technique
Currently, composite lining is widely applied in China's Tunnel Engineering, according to New Austrian Tunneling Method design concept, preliminary bracing is
Primary load bearing structure.The Composite Supporting System that Tunnel is made of gunite concrete, anchor pole, steelframe etc., wherein steel
Frame has biggish supporting intensity and rigidity, can significantly increase preliminary bracing ability.In order to increase the whole steady of every Pin steelframe
It is qualitative, it is attached between adjacent steelframe frequently with longitudinally connected reinforcing bar；In order to which steelframe is anchored at country rock deep, steel is given full play to
The stiffness and strength of frame, steelframe step foot is standing to set lock foot anchor tube.Traditional longitudinally connected reinforcing bar and lock foot and steelframe use
It is welded to connect, existing technology has the following problems:
1, welding has that speed of application is slow in tunnel, does not meet in ten Eight Terms Guidelines of Modelling of Tunnel Excavation in Soft Rock
The requirement of " early closing "；
2, welding generates a large amount of toxic gases, pollutes environment, is unfavorable for the occupational health of construction personnel；
3, since site welding is connected to overhead welding and working space is narrow, welding quality is difficult to ensure；
4, progress weld job is higher to air-conditioning requirement in gas tunnel, and there are certain security risks.
One kind is disclosed in Chinese utility model patent CN 205477642U to grow up buried Gas Outburst tunnel solderless branch
Protection structure is made of preliminary bracing steelframe and advance support steel skeleton, and preliminary bracing steelframe is made of more Pin arches, and arch passes through
The lock foot anchor tube being anchored in tunnel wall is fixedly connected with nut；It is fixed between adjacent arch by longitudinally connected pull rod and nut
Connection；The advance support steel skeleton include more protract and the seamless steel pipe for anchoring of being in the milk formed pipe booth structure, every is seamless
Steel pipe corresponds to a grout hole, and multiple grout holes are scattered in two rows, two rows grouting along the top of tunnel control contour line and left and right side
Hole mutual dislocation, and seamless steel pipe when meeting coal seam with the part for being pierced by coal seam, advance support steel skeleton further includes along tunnel
Wall is inclined outwardly the advanced tubule of 40~50 ° of insertion rock stratum or coal seam and more floral tube structures of anchoring of being in the milk.The structure is deposited
Versatility it is poor, cannot inclination angle between the actual condition adjustment anchor tube and steel arch-shelf according to lock foot anchor tube, it cannot be guaranteed that anchor
Pipe and the technical issues of being stably connected with of steel arch-shelf, while also cannot achieve the connection of the fast and stable of steel arch-shelf longitudinal direction.
Summary of the invention
In view of the above-mentioned drawbacks of the prior art, the purpose of the present invention is to solve the deficiency of the above background technology,
There is provided it is a kind of at the beginning of tunnel branch construct grid steel frame exempt from weld quick assembling supporting construction, be not only simple in structure, assembly side
Just, and speed of application caused by tunnel welding procedure slow can be efficiently avoided, pollution, quality are difficult to guarantee etc., and correlations are asked
Topic.
In order to solve the above technical problems, present invention employs such a grid steel frames constructed for branch at the beginning of tunnel to exempt to weld
Quick assembling supporting construction comprising along more Pin grid steel arch-shelfs that tunnel longitudinal gap is arranged, grid steel arch described in every Pin
Frame is anchored in tunnel wall by locking foot anchor tube attachment device；Pass through one-above-the-other layout phase between the adjacent grid steel arch-shelf
It connects；The lock foot anchor tube attachment device includes the guiding steel plate being fixed on the grid steel arch-shelf, the guiding steel plate
It is equipped with the pilot hole passed through for lock foot anchor tube；Anchoring connector is installed on pilot hole in the guiding steel plate；The anchoring
Connector is made of anchor head special bolt, nut and two groups of taperliners；The anchor head special bolt pass through pilot hole, described two groups
Taperliner covers on anchor head special bolt and is located at the inside and outside two sides of the guiding steel plate, and the nut is tightened in anchor head
On special bolt, two groups of taperliners and two sides inside and outside guiding steel plate are fitted closely, the central axis of the anchor head special bolt
The end slope of line and the guiding steel plate；The axis direction of the anchor head special bolt is provided with through grouting pipe；It is described
The inner end of anchor head special bolt is connected with lock foot anchor tube；The lock foot anchor tube is installed in tunnel wall；Grid steel arch described in every Pin
Frame is welded with multiple junction steel plates along its circumferential equidistant placement in advance along the both sides of the face of tunnel longitudinal direction；On the junction steel plate
It is provided with the slotted hole for connecting the one-above-the-other layout；The one-above-the-other layout is provided with externally threaded for both ends
Longitudinally connected reinforcing bar；The both ends of the longitudinally connected reinforcing bar, which are each passed through, to be arranged symmetrically on the two neighboring grid steel arch-shelf
Slotted hole on junction steel plate is simultaneously realized affixed with the junction steel plate by locking nut.
In a kind of preferred embodiment of the invention, every group of taperliner includes wedge-shaped rubber backing plate peace steel pad
Plate；The wedge-shaped rubber backing plate and the flat billet coaxial package are on the anchor head special bolt；The flat billet
The tapered end face paste of one end face and the wedge-shaped rubber backing plate is closed, the other end of the flat billet and the guiding steel plate
It is oriented to hole end surface fitting；The planar end surface of the wedge-shaped rubber backing plate is limited by the nut being connected on the anchor head special bolt
It is fixed.
In a kind of preferred embodiment of the invention, the wedge-shaped rubber backing plate inner face and backing plate axis are tilted, outside
End face is vertical with backing plate axis.
In a kind of preferred embodiment of the invention, the anchor head special bolt includes hexagonal bolt head；The hexagonal
Bolt head is located at anchor head special bolt outer end；The nut and anchor head special bolt inner end external screw thread cooperate, two groups of wedge shapes
The pilot hole of gasket and guiding steel plate is between nut and the hexagonal bolt head of anchor head special bolt.
In a kind of preferred embodiment of the invention, the outer end of the anchor head special bolt is disposed with and the Grouting Pipe
The filling adaptor of road connection.
In a kind of preferred embodiment of the invention, the grid steel arch-shelf includes coaxially arranged interior arch and bowed out
Frame is provided with Figure of eight between the interior arch and the outer arch；The guiding steel plate be welded on the outer arch in advance and with
Tunnel wall surface parallel arrangement；The pilot hole is symmetrically disposed on the guiding steel plate of tunnel steelframe both sides.
In a kind of preferred embodiment of the invention, the external screw thread and lock foot anchor tube of the inner end of the anchor head special bolt
The internal screw thread of outer end matches.
In a kind of preferred embodiment of the invention, the connection steel that is arranged on the both sides of the face of same grid steel arch-shelf
The interlaced arrangement of plate.
In a kind of preferred embodiment of the invention, the length of longitudinally connected reinforcing bar is steelframe longitudinal pitch+steelframe peace
Fill longitudinal tolerance value.
In a kind of preferred embodiment of the invention, the slotted hole on junction steel plate is waist-shaped hole.
In a kind of preferred embodiment of the invention, it is welded in the ipsilateral two neighboring connection steel of same grid steel arch-shelf
Spacing between plate 2 is equal to length/2 of longitudinally connected reinforcing bar 3.
The beneficial effects of the present invention are: it is the configuration of the present invention is simple, easy to install and use, pass through grid steel arch-shelf and lock foot anchor
Assembly connection between pipe, eliminates welding, avoids the correlations such as speed of application caused by welding is slow, pollute, quality is difficult to guarantee
Problem；Simultaneously by grid steel arch-shelf prewelding steel plate, and reserving hole on the steel plate, pilot hole is carried out using hole,
Facilitate construction；And the anchoring connector specially designed can replace the different wedge-shaped rubber backing plate of wedge degree according to specific requirement to reality
Existing steelframe and the adjustment for locking foot anchor tube inclination angle；Injected hole is reserved by setting anchoring connector and in anchoring connector, facilitates connection
With construction, accelerate installation speed, grid steel arch-shelf is fixed by the way that one-above-the-other layout is arranged, improves installation speed
Degree, correction are flexible and convenient, it is ensured that the adjustability connected within the scope of steelframe installation tolerance.
Detailed description of the invention
Fig. 1 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Structural schematic diagram；
Fig. 2 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Main view along tunnel longitudinal direction；
Fig. 3 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Top view along tunnel longitudinal direction；
Fig. 4 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Lock the guiding steel plate structure schematic diagram of foot anchor tube attachment device；
Fig. 5 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Lock the structural schematic diagram of foot anchor tube attachment device；
Fig. 6 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Lock foot anchor tube attachment device explosion diagram；
Fig. 7 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Lock the anchoring joint structure schematic diagram of foot anchor tube attachment device；
Fig. 8 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
Lock the structural schematic diagram of the anchor head special bolt of foot anchor tube attachment device；
Fig. 9 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
The attachment structure schematic diagram of one-above-the-other layout and grid steel arch-shelf；
Figure 10 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
One-above-the-other layout longitudinally connected bar construction schematic diagram；
Figure 11 is that a kind of grid steel frame constructed for branch at the beginning of tunnel of the embodiment of the present invention exempts to weld quick assembling supporting construction
One-above-the-other layout junction steel plate structural schematic diagram；
In figure: A- grid steel arch-shelf, B- lock foot anchor tube attachment device, C- one-above-the-other layout, arch in A-1-, outside A-2-
Arch, A-3- Figure of eight, B-2 are oriented to steel plate, and B-2-1- is oriented to circular hole；B-3- anchors connector；B-3-1- anchor head special bolt；B-
3-2- wedge-shaped rubber backing plate；The flat billet of B-3-3-；B-3-4- nut；B-3-1-1- filling adaptor；B-3-1-2- special bolt
Head；B-3-1-3- reserves hollow grouting pipe；B-3-1-4- special bolt screw thread；B-4- locks foot anchor tube；B-4-1- locks foot anchor
Internal screw thread, C-2- junction steel plate, C-3- slotted hole, the longitudinally connected reinforcing bar of C-4-, C-5- locking nut, outside C-6- is arranged in pipe end
Screw thread.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As Fig. 1 to it is shown in Fig. 2 it is a kind of for tunnel at the beginning of the grid steel frame constructed of branch exempt to weld quick assembling supporting construction
Structural schematic diagram is it is found that present invention is mainly used for carryings when tunnel initial-stage construction comprising arranges along tunnel longitudinal gap
More Pin grid steel arch-shelf A, every Pin grid steel arch-shelf A by lock foot anchor tube attachment device B be anchored in tunnel wall；Adjacent grid
It is connected with each other between steel arch-shelf A by one-above-the-other layout C；For the ease of the quick fixation of the every Pin grid steel arch-shelf A of the present invention,
Lock foot anchor tube attachment device B for stationary grizzly steel arch-shelf includes the guiding steel plate B-2 being fixed on grid steel arch-shelf A, is led
The pilot hole B-2-1 passed through for lock foot anchor tube B-4 is equipped with to steel plate B-2；Pacify on pilot hole B-2-1 in guiding steel plate B-2
Equipped with anchoring connector B-3；Anchoring connector B-3 is made of anchor head special bolt B-3-1, nut B-3-4 and two groups of taperliners；Anchor
Head special bolt B-3-1 passes through pilot hole B-2-1, and two groups of taperliners are covered on anchor head special bolt B-3-1 and are located at
It is oriented to the inside and outside two sides of steel plate B-2, nut B-3-4 is tightened on anchor head special bolt B-3-1, by two groups of taperliners and guiding
Two sides fits closely inside and outside steel plate B-2, the central axis of anchor head special bolt B-3-1 and the end slope of guiding steel plate B-2；Anchor
The axis direction of head special bolt B-3-1 is provided with through grouting pipe B-3-1-3；The inner end of anchor head special bolt B-3-1 with
Foot anchor tube B-4 is locked to be connected；Lock foot anchor tube B-4 be installed in tunnel wall, every group of taperliner include wedge-shaped rubber backing plate B-3-2 and
Flat billet B-3-3；Wedge-shaped rubber backing plate B-3-2 peace billet B-3-3 coaxial package is on anchor head special bolt B-3-1；
An end face of flat billet B-3-3 and the tapered end face paste of wedge-shaped rubber backing plate B-3-2 are closed, the other end of flat billet B-3-3
Face is bonded with the end face pilot hole B-2-1 of guiding steel plate B-2；The planar end surface of wedge-shaped rubber backing plate B-3-2 is by being connected to anchor head
Nut B-3-4 on special bolt B-3-1, which is limited, to be fixed；Wedge-shaped rubber backing plate B-3-2 inner face and backing plate axis tilt, outer end
Face is vertical with backing plate axis；Anchor head special bolt B-3-1 includes hexagonal bolt head；Hexagonal bolt head is located at anchor head special bolt B-
The outer end 3-1；Nut B-3-4 and anchor head special bolt B-3-1 inner end external screw thread cooperate, two groups of taperliners and guiding steel plate 2
Pilot hole B-2-1 is located between nut B-3-4 and the hexagonal bolt head of anchor head special bolt B-3-1；Anchor head special bolt B-3-1
Outer end be disposed with the filling adaptor B-3-1-1 being connected to grouting pipe B-3-1-3；Grid steel arch-shelf A includes coaxially arranged
Interior arch A-1 and outer arch A-2, is provided with Figure of eight A-3 between interior arch A-1 and outer arch A-2；It is oriented to steel plate B-2 prewelding
It is arranged in parallel on outer arch A-2 and with tunnel wall surface；Pilot hole B-2-1 is symmetrically disposed on the guiding of the tunnel both sides steelframe B-1
On steel plate B-2；The external screw thread of the inner end of anchor head special bolt B-3-1 is matched with the internal screw thread of the lock outer end foot anchor tube B-4.This hair
Bright every Pin grid steel arch-shelf A is welded with multiple connection steel along its circumferential equidistant placement in advance along the both sides of the face of tunnel longitudinal direction
Plate C-2；The slotted hole C-3 for connecting one-above-the-other layout C is provided on junction steel plate C-2；One-above-the-other layout C is both ends
It is provided with externally threaded longitudinally connected reinforcing bar C-4；The both ends of longitudinally connected reinforcing bar C-4 are each passed through two neighboring grid steel arch
The slotted hole C-3 on junction steel plate C-2 that is arranged symmetrically on frame A is simultaneously realized solid with junction steel plate C-2 by locking nut C-5
It connects, for the ease of the reasonable Arrangement of longitudinally connected reinforcing bar C-4, the connection being arranged on the both sides of the face of same grid steel arch-shelf A
The interlaced arrangement of steel plate C-2；The length of longitudinally connected reinforcing bar C-4 is that steelframe longitudinal pitch is inclined plus the longitudinal permission of steelframe installation
Difference, the slotted hole on junction steel plate C-2 is waist-shaped hole, is welded in the ipsilateral two neighboring junction steel plate of same grid steel arch-shelf
Spacing between C-2 is equal to length/2 of longitudinally connected reinforcing bar C-4.
Its installation step of the invention is as follows:
Step 1: process: in processing factory, processing guiding steel plate B-2 simultaneously reserves pilot hole B-2-1 in two sides, in
Sky lock foot anchor tube B-4 has the junction steel plate C-2 of slotted hole C-3 by steelframe side head setting internal screw thread B-4-1, processing, according to
Construction and step height requirement are oriented to steel plate B-2 and junction steel plate C-2 in grid steel arch-shelf A prewelding.
Step 2: boring procedure: construction site is excavated, and after the processing of excavation face out break, applies just pneumatically placed concrete, grid steel
Arch A is in place, installs one-above-the-other layout, and installation quality after the assay was approved, utilizes the pilot hole B- reserved on guiding steel plate B-2
2-1 drills, general by setting downwards with 30-45° angle of horizontal direction degree, studies intensively depth greater than anchor tube length certain distance.
Tubulature process: step 3 after the completion of drilling, locks foot anchor tube B-4 and passes through insertion drilling from pilot hole B-2-1.
Step 4, assembled process: anchor head special bolt B-3-1 first passes through wedge-shaped rubber backing plate B-3-2, flat billet B-3-
3, pilot hole B-2-1, nut B-3-4 and guiding steel plate B-2 assembly clamping, then rotating special bolt head B-3-1-2 makes spiral shell
Bolt bottom is connect with the lock end foot anchor tube B-4, and then rotating nuts B-3-4 locks anchor head B-3 and steel plate B-2, finally by
The filling adaptor B-3-1-1 being arranged on anchor head special bolt B-3-1 carries out slip casting operation, is finally completed lock foot anchor tube by design position
It sets and angle positioning can guarantee that lock foot anchor tube can effectively become one with steelframe again simultaneously.
Step 5 is jetted through journey again: after completing above-mentioned operation, carrying out answering spray operation by design requirement after qualified by inspection, connect
Carry out lower circulation and excavate and supporting operation.
It should be understood that the above description is merely a specific embodiment, but protection scope of the present invention is not
Be confined to this, anyone skilled in the art within the technical scope disclosed by the invention, the variation that can be readily occurred in
Or replacement, it should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of grid steel frame constructed for branch at the beginning of tunnel exempts to weld quick assembling supporting construction, including along tunnel longitudinal gap
More Pin grid steel arch-shelfs (A) of arrangement, grid steel arch-shelf (A) described in every Pin are anchored at tunnel by locking foot anchor tube attachment device (B)
On road wall；It is connected with each other between the adjacent grid steel arch-shelf (A) by one-above-the-other layout (C)；It is characterized by:
Lock foot anchor tube attachment device (B) includes the guiding steel plate (B-2) being fixed on the grid steel arch-shelf (A), described
Guiding steel plate (B-2) is equipped with the pilot hole (B-2-1) passed through for lock foot anchor tube (B-4)；Leading in guiding steel plate (B-2)
Anchoring connector (B-3) is installed on hole (B-2-1)；The anchoring connector (B-3) is by anchor head special bolt (B-3-1), nut
(B-3-4) it is formed with two groups of taperliners；The anchor head special bolt (B-3-1) passes through pilot hole (B-2-1), two groups of wedges
Shape gasket covers on anchor head special bolt (B-3-1) and is located at the inside and outside two sides of guiding steel plate (B-2), the nut
(B-3-4) it is tightened on anchor head special bolt (B-3-1), two groups of taperliners and two sides inside and outside guiding steel plate (B-2) are close
Fitting, the end slope of the central axis of the anchor head special bolt (B-3-1) and guiding steel plate (B-2)；The anchor head
The axis direction of special bolt (B-3-1) is provided with through grouting pipe (B-3-1-3)；The anchor head special bolt (B-3-1)
Inner end with lock foot anchor tube (B-4) be connected；The lock foot anchor tube (B-4) is installed in tunnel wall；
Grid steel arch-shelf (A) described in every Pin is welded with multiple along its circumferentially disposed connection in advance along the both sides of the face of tunnel longitudinal direction
Steel plate (C-2)；The slotted hole (C-3) for connecting the one-above-the-other layout (C) is provided on the junction steel plate (C-2)；
The one-above-the-other layout (C) is that both ends are provided with externally threaded longitudinally connected reinforcing bar (C-4)；The longitudinally connected reinforcing bar
(C-4) both ends are each passed through oval on the junction steel plate (C-2) being arranged symmetrically on the two neighboring grid steel arch-shelf (A)
It is simultaneously realized by locking nut (C-5) affixed with the junction steel plate (C-2) in hole (C-3).
2. a kind of grid steel frame constructed for branch at the beginning of tunnel according to claim 1 exempts to weld quick assembling supporting construction,
It is characterized by: taperliner described in every group includes the peaceful billet (B-3-3) of wedge-shaped rubber backing plate (B-3-2)；The wedge shape
Rubber mat plate (B-3-2) and flat billet (B-3-3) coaxial package are on the anchor head special bolt (B-3-1)；It is described
The tapered end face paste of one end face of flat billet (B-3-3) and the wedge-shaped rubber backing plate (B-3-2) is closed, the flat billet
(B-3-3) other end is bonded with end face pilot hole (B-2-1) of guiding steel plate (B-2)；The wedge-shaped rubber backing plate
(B-3-2) planar end surface is fixed by nut (B-3-4) limit being connected on the anchor head special bolt (B-3-1).
3. a kind of grid steel frame constructed for branch at the beginning of tunnel according to claim 2 exempts to weld quick assembling supporting construction,
It is characterized by: wedge-shaped rubber backing plate (B-3-2) inner face and backing plate axis tilt, outer end face is vertical with backing plate axis.
4. a kind of grid steel frame constructed for branch at the beginning of tunnel according to claim 1 exempts to weld quick assembling supporting construction,
It is characterized by: the anchor head special bolt (B-3-1) includes hexagonal bolt head；The hexagonal bolt head is located at the dedicated spiral shell of anchor head
The outer end bolt (B-3-1)；The nut (B-3-4) and anchor head special bolt (B-3-1) inner end external screw thread cooperate, two groups of wedge shapes
Gasket and the pilot hole (B-2-1) for being oriented to steel plate (2) are located at the hexagonal spiral shell of nut (B-3-4) Yu anchor head special bolt (B-3-1)
Between bolt head.
5. a kind of grid steel frame constructed for branch at the beginning of tunnel according to claim 1 exempts to weld quick assembling supporting construction,
It is characterized by: the outer end of the anchor head special bolt (B-3-1) is disposed with the note being connected to the grouting pipe (B-3-1-3)
It starches connector (B-3-1-1).
6. a kind of grid steel frame constructed for branch at the beginning of tunnel according to claim 1 exempts to weld quick assembling supporting construction,
It is characterized by: the grid steel arch-shelf (A) includes coaxially arranged interior arch (A-1) and outer arch (A-2), the interior arch
(A-1) it is provided between the outer arch (A-2) Figure of eight (A-3)；The guiding steel plate (B-2) is welded in the outer arch in advance
(A-2) it is arranged in parallel on and with tunnel wall surface；The pilot hole (B-2-1) is symmetrically disposed on leading for the tunnel steelframe both sides (B-1)
To on steel plate (B-2).
7. it is quick that a kind of grid steel frame constructed for branch at the beginning of tunnel according to any claim from 1 to 6 exempts from weldering
Assemble supporting construction, it is characterised in that: the external screw thread and lock foot anchor tube (B-4) of the inner end of the anchor head special bolt (B-3-1)
The internal screw thread of outer end matches.
8. a kind of grid steel frame constructed for branch at the beginning of tunnel according to claim 1 exempts to weld quick assembling supporting construction,
It is characterized by: junction steel plate (C-2) the interlaced arrangement being arranged on the both sides of the face of same grid steel arch-shelf (A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107676110B (en) * | 2017-08-23 | 2023-09-08 | 北京工业大学 | Connecting structure of lock leg anchoring device and supporting arch frame |
| CN108150104B (en) * | 2018-02-09 | 2023-12-26 | 中交隧道工程局有限公司 | Pin locking anchor pipe drilling positioning device and anchor pipe fixing method |
| CN108518229A (en) * | 2018-04-24 | 2018-09-11 | 中铁五局集团第五工程有限责任公司 | Large deformation weak broken wall rock outsized section tunnel excavation supporting structure and construction method |
| CN113006827B (en) * | 2021-02-23 | 2023-06-13 | 中铁十九局集团第三工程有限公司 | Rigid lock leg supporting structure of soft rock tunnel steel frame |
| CN113464148A (en) * | 2021-07-30 | 2021-10-01 | 中铁二十三局集团有限公司 | Construction method of large structure with Xigeda stratum section shallow-buried underground ground surface |
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