CN110374637A - Tunnel bilayer steelframe and its installation method - Google Patents
Tunnel bilayer steelframe and its installation method Download PDFInfo
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- CN110374637A CN110374637A CN201910618879.9A CN201910618879A CN110374637A CN 110374637 A CN110374637 A CN 110374637A CN 201910618879 A CN201910618879 A CN 201910618879A CN 110374637 A CN110374637 A CN 110374637A
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- 238000009434 installation Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000011435 rock Substances 0.000 claims description 17
- 239000002689 soil Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 230000005641 tunneling Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 181
- 239000002356 single layer Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
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Classifications
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- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/30—Bases for lower arch members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- Geochemistry & Mineralogy (AREA)
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Abstract
The present invention relates to constructing tunnel engineering field, a kind of tunnel bilayer steelframe and its installation method are provided.Including the top bar internal layer steelframe and top bar outer layer steelframe coincideing with tunnel top bar profile, get out of a predicament or an embarrassing situation profile identical get out of a predicament or an embarrassing situation internal layer steelframe and outer layer steelframe of getting out of a predicament or an embarrassing situation with tunnel, identical inverted arch internal layer steelframe and inverted arch outer layer steelframe with tunnel inverted arch profile；The lower end of the top bar internal layer steelframe and top bar outer layer steelframe correspondence is connect with the upper end of get out of a predicament or an embarrassing situation internal layer steelframe and outer layer steelframe of getting out of a predicament or an embarrassing situation, the lower end for getting out of a predicament or an embarrassing situation internal layer steelframe is connect with basic plane, the upper end of inverted arch internal layer steelframe of the lateral surface of the lower end of the internal layer steelframe of getting out of a predicament or an embarrassing situation with nock upward is connect, and the upper end of inverted arch outer layer steelframe of the lower end of the outer layer steelframe of getting out of a predicament or an embarrassing situation with nock upward is connect.The first Zhi Gangdu that tunnel is improved using the double-deck steelframe, solves the problems, such as serious deformation.
Description
Technical field
The invention belongs to constructing tunnel engineering field, in particular to a kind of tunnel bilayer steelframe and its installation method.
Background technique
In constructing tunnel engineering, high ground stress soft rock stress serious deformation problem is had been a concern, high ground stress soft rock stress
Have the defects that weak country rock, self-stable ability difference and crustal stress are horizontal and high, if technology measure is improper, it is easy to occur to squeeze
Large deformation is pressed, leads to that tunnel injection concrete cracking, peeling, steelframe distortion fractures, preliminary bracing invades that limit changes, secondary lining is opened
It splits chip off-falling or even the diseases such as collapse, causes to seriously affect to constructing tunnel quality, safety, progress and cost.Control large deformation
One of method is exactly to improve just Zhi Gangdu, and the effect of the large deformation of single layer steelframe control at present has been difficult to obtain ideal effect, institute
With it is necessary to the mounting structures to steelframe and installation method to make improvement, to guarantee large deformation requirement.
Summary of the invention
The purpose of the present invention is to provide a kind of tunnel bilayer steelframes, and the first Zhi Gangdu in tunnel is improved using the double-deck steelframe,
Solve the problems, such as serious deformation.
To achieve the goals above, the present invention takes following technical scheme: a kind of tunnel bilayer steelframe, including on tunnel
Step profile identical top bar internal layer steelframe and top bar outer layer steelframe are got out of a predicament or an embarrassing situation the identical internal layer of getting out of a predicament or an embarrassing situation of profile with tunnel
Steelframe and outer layer steelframe of getting out of a predicament or an embarrassing situation, the inverted arch internal layer steelframe and inverted arch outer layer steelframe coincideing with tunnel inverted arch profile；It is described to appear on the stage
The lower end of rank internal layer steelframe and top bar outer layer steelframe correspondence and internal layer steelframe and the upper of outer layer steelframe of getting out of a predicament or an embarrassing situation of getting out of a predicament or an embarrassing situation
End connection, the lower end for getting out of a predicament or an embarrassing situation internal layer steelframe are connect with basic plane, the outside of the lower end of the internal layer steelframe of getting out of a predicament or an embarrassing situation
The upper end of inverted arch internal layer steelframe of the face with nock upward is connect, the lower end of the outer layer steelframe of getting out of a predicament or an embarrassing situation and the inverted arch of nock upward
The upper end of outer layer steelframe connects.
Optionally, when the top bar outer layer steelframe is not installed, it is arranged between two lower ends of the top bar internal layer steelframe
There is interim inverted arch.
Optionally, the outside of the top bar internal layer steelframe, get out of a predicament or an embarrassing situation the internal layer steelframe and the inverted arch internal layer steelframe
Face is all provided with standing screw, and the top bar outer layer steelframe described is got out of a predicament or an embarrassing situation on outer layer steelframe and the inverted arch outer layer steelframe
All offer the mounting hole with standing screw cooperation.
Optionally, the mounting hole is bar shaped stepped hole, and the bar shaped stepped hole is arranged from the inside to the outside there are two reducer,
And inner reducer width is consistent with the standing screw, outer reducer width is greater than inner reducer width.
Optionally, the top bar internal layer steelframe includes arc top internal layer steelframe, the both ends of the arc top internal layer steelframe and arc
The connection of top side internal layer steelframe；The corresponding top bar outer layer steelframe includes arc top outer layer steelframe, the arc top outer layer steelframe
Both ends are connect with arc top side outer layer steelframe.
Optionally, the inverted arch internal layer steelframe includes arc bottom internal layer steelframe, the both ends and arc bottom of the arc bottom internal layer steelframe
The connection of side internal layer steelframe；The corresponding inverted arch outer layer steelframe includes arc bottom outer layer steelframe, the both ends of the arc bottom outer layer steelframe
It is connect with arc bottom side outer layer steelframe.
It optionally, further include cushion cap, the cushion cap includes the substrate being arranged on basic plane, the internal layer steel of getting out of a predicament or an embarrassing situation
The lower end of frame is connect with substrate, and the interior outside for reinforcing the lower end of inclined plate and the internal layer steelframe of getting out of a predicament or an embarrassing situation is provided on the substrate
Face connection.
Optionally, the top bar internal layer steelframe, get out of a predicament or an embarrassing situation internal layer steelframe and the inverted arch internal layer steelframe pass through solid
Determine anchor pole to connect with border country rock.
The object of the invention is also to provide a kind of installation methods of tunnel bilayer steelframe, improve tunnel using the double-deck steelframe
First Zhi Gangdu, solve the problems, such as serious deformation.
To achieve the goals above, the present invention takes following technical scheme: a kind of installation method of tunnel bilayer steelframe, packet
Include following steps:
A, the tunneling top bar soil body, corresponding top bar border country rock install top bar internal layer steelframe；
B, tunneling is got out of a predicament or an embarrassing situation the soil body, excavation get out of a predicament or an embarrassing situation the soil body when, the lower section of the lower end of corresponding top bar internal layer steelframe
Basis of formation plane of leveling land is carried out, then corresponding top bar border country rock installs internal layer steelframe of getting out of a predicament or an embarrassing situation, and will get out of a predicament or an embarrassing situation
The top and bottom correspondence of internal layer steelframe is connect with the lower end of top bar internal layer steelframe and basic plane；
C, the tunneling inverted arch soil body, it is first that inverted arch internal layer steelframe and inverted arch outer layer steelframe is previously-joined, with
Inverted arch border country rock installation inverted arch internal layer steelframe is corresponded to afterwards, and will be outside the lower end of inverted arch internal layer steelframe and internal layer steelframe of getting out of a predicament or an embarrassing situation
Side is attached；
D, the lower end for outer layer steelframe of getting out of a predicament or an embarrassing situation is connect with the upper end of inverted arch outer layer steelframe, while the outer layer steelframe that will get out of a predicament or an embarrassing situation
Internal layer steelframe is connect with getting out of a predicament or an embarrassing situation；The lower end of top bar outer layer steelframe is connect with the upper end for outer layer steelframe of getting out of a predicament or an embarrassing situation, simultaneously will
Top bar outer layer steelframe is connect with top bar internal layer steelframe.
Optionally, in the step A, interim inverted arch, the step D are connected between two lower ends of top bar internal layer steelframe
In, interim inverted arch is removed when top bar outer layer steelframe is installed.
Compared with prior art: top bar outer layer steelframe, get out of a predicament or an embarrassing situation outer layer steelframe and inverted arch outer layer steelframe is arranged in the present invention
The overall structure stability for further increasing first branch steelframe prevents the influence meeting of subsequent crustal stress so that large deformation occurs for tunnel.
Detailed description of the invention
Fig. 1 is the double-deck steelframe schematic diagram of the present invention；
Fig. 2 is internal layer steelframe and outer layer steelframe connection schematic diagram；
Fig. 3 is cushion cap and internal layer steelframe connection schematic diagram of getting out of a predicament or an embarrassing situation.
Appended drawing reference:
1, top bar internal layer steelframe；11, arc top internal layer steelframe；12, arc top side internal layer steelframe；2, top bar outer layer steelframe；
21, arc top outer layer steelframe；22, arc top side outer layer steelframe；3, it gets out of a predicament or an embarrassing situation internal layer steelframe；4, it gets out of a predicament or an embarrassing situation outer layer steelframe；5, in inverted arch
Layer steelframe；51, arc bottom internal layer steelframe；52, arc bottom side internal layer steelframe；6, inverted arch outer layer steelframe；61, arc bottom outer layer steelframe；62, arc
Bottom side outer layer steelframe；7, interim inverted arch；81, standing screw；82, mounting hole；9, cushion cap；91, substrate；92, reinforce inclined plate；10,
Fixing anchor bar.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawings and examples
The present invention is described in further detail.It is understood that described embodiment is a part of the embodiments of the present invention,
Instead of all the embodiments.Specific embodiment described herein is used only for explaining the present invention, rather than to limit of the invention
It is fixed.Based on described the embodiment of the present invention, those of ordinary skill in the art's every other embodiment obtained is belonged to
The scope of protection of the invention.
A kind of tunnel bilayer steelframe, as shown in Figure 1, tunnel can be divided into semicircular top bar area according to tunnel contour line
What domain, the top bar that postpones region were inwardly arranged downwards get out of a predicament or an embarrassing situation region and inverted arch region, the abutment wall in corresponding top bar region
It is provided with top bar internal layer steelframe 1 and top bar outer layer steelframe 2, the abutment wall in region of getting out of a predicament or an embarrassing situation is provided with internal layer steelframe 3 of getting out of a predicament or an embarrassing situation
With outer layer steelframe 4 of getting out of a predicament or an embarrassing situation, the bottom in inverted arch region is provided with inverted arch internal layer steelframe 5 and inverted arch outer layer steelframe 6；
Top bar region and region of getting out of a predicament or an embarrassing situation successively are excavated, first progress top bar internal layer steelframe 1 and internal layer steel of getting out of a predicament or an embarrassing situation
The fixed installation of frame 3 a, wherein basic plane is reserved, so that getting out of a predicament or an embarrassing situation under internal layer steelframe 3 when excavation gets out of a predicament or an embarrassing situation region
End be directly anchored on basic plane, have the advantage that: if being not provided with basic plane, tunnel top bar region, under
Top bar internal layer steelframe 1 and internal layer steelframe 3 of getting out of a predicament or an embarrassing situation may under the action of the crustal stress that the border country rock of stepped area is applied
Certain deformation can occur, it is possible that docking is uneven when inverted arch internal layer steelframe 5 is docked with internal layer steelframe 3 of getting out of a predicament or an embarrassing situation at this time
Situation, but after basic plane is arranged, partially stress can be undertaken by basic plane in this way, reduce top bar internal layer steelframe 1
And the deformation for internal layer steelframe 3 of getting out of a predicament or an embarrassing situation, even if deformation occurs inverted arch internal layer steelframe 5 and the lower end for internal layer steelframe 3 of getting out of a predicament or an embarrassing situation is outer
Also there is the selective adjustment of relatively large mounting surface in side when connecting；In addition to this present invention setting top bar outer layer steelframe 2, under
Step outer layer steelframe 4 and inverted arch outer layer steelframe 6 further increase the overall structure stability of first branch steelframe, prevent subsequent crustal stress
Influence meeting so that tunnel occur large deformation.
In some embodiments, as shown in Figure 1, after fixed top bar internal layer steelframe 1, top bar internal layer steelframe 1
It is provided with interim inverted arch 7 between two lower ends, temporary support can be played the role of, top bar internal layer steelframe 1 is avoided to be answered by ground
Power influence deforms, and influences the abutting joint of subsequent get out of a predicament or an embarrassing situation internal layer steelframe 3 and top bar internal layer steelframe 1.
In some embodiments, as shown in Fig. 2, when installation top bar outer layer steelframe 2, get out of a predicament or an embarrassing situation outer layer steelframe 4 and inverted arch
When outer layer steelframe 6, so that mounting hole 82 is directed at top bar internal layer steelframe 1, gets out of a predicament or an embarrassing situation on internal layer steelframe 3 and inverted arch internal layer steelframe 5
Standing screw 81, be then fixed using nut, certainly except bolt connecting mode except, those skilled in the art may be used also
Inside and outside two layers of the steelframe of U-shaped board clamping can be used and connected using the fixed internal layer steelframe of other structures connector and outer layer steelframe
It connects.
In some embodiments, as shown in Fig. 2, because the influence top bar internal layer steelframe 1 of crustal stress, internal layer steel of getting out of a predicament or an embarrassing situation
Some deformation, which may occur, for frame 3 and inverted arch internal layer steelframe 5 causes mounting hole 82 that cannot be aligned with standing screw 81, so installation
Hole 82 is that bar shaped is convenient for cooperating with standing screw 81, in addition to lateral surface is protruded when nut being avoided to install, so by mounting hole
82 are arranged to stepped hole convenient for nut inlay card to outer reducer.
In some embodiments, as shown in Figure 1, top bar internal layer steelframe 1 includes arc top internal layer steelframe 11, arc top internal layer steel
The both ends of frame 11 are connect with arc top side internal layer steelframe 12；Corresponding top bar outer layer steelframe 2 includes arc top outer layer steelframe 21, arc top
The both ends of outer layer steelframe 21 are connect with arc top side outer layer steelframe 22.Inverted arch internal layer steelframe 5 includes arc bottom internal layer steelframe 51, in arc bottom
The both ends of layer steelframe 51 are connect with arc bottom side internal layer steelframe 52；Corresponding inverted arch outer layer steelframe 6 includes arc bottom outer layer steelframe 61, arc
The both ends of bottom outer layer steelframe 61 are connect with arc bottom side outer layer steelframe 62.It can be according to actual installation requirements by top bar internal layer steelframe
1, top bar outer layer steelframe 2, inverted arch internal layer steelframe 5 and inverted arch outer layer steelframe 6 are divided into several parts, can be assembled into one in advance
Installation is fixed with tunnel border country rock again in a entirety, peace can also be fixed with tunnel border country rock one by one in its branch
Dress.
In some embodiments, a basic plane, this base are modified out in advance when region as shown in figure 3, excavation is got out of a predicament or an embarrassing situation
Plinth plane can casting concrete this region is reinforced, when pouring while cushion cap 9 can be embedded in basic plane, then will
The get out of a predicament or an embarrassing situation lower end of internal layer steelframe 3 is connect with substrate 91, is auxiliarily fixed using inclined plate 92 is reinforced, those skilled in the art are also
It can connect or be welded using other mechanical structured members, complete the fixation of internal layer steelframe 3 of getting out of a predicament or an embarrassing situation.
In some embodiments, as shown in Figure 1, top bar internal layer steelframe 1, get out of a predicament or an embarrassing situation internal layer steelframe 3 and inverted arch internal layer steel
Frame 5 is connect by fixing anchor bar 10 with border country rock.
A kind of installation method of tunnel bilayer steelframe, includes the following steps:
A, according to tunnel contour line and the deformation allowance tunneling top bar soil body, corresponding top bar border country rock is used
Top bar internal layer steelframe 1 is fixedly mounted in fixing anchor bar 10, is connected with interim inverted arch 7 between two lower ends of top bar internal layer steelframe 1,
Interim inverted arch 7 plays the role of temporary support, and top bar internal layer steelframe 1 is avoided to be influenced to deform by crustal stress；
B, get out of a predicament or an embarrassing situation the soil body according to tunnel contour line and deformation allowance tunneling, excavation get out of a predicament or an embarrassing situation the soil body when, it is corresponding
Basis of formation plane of leveling land is carried out below the lower end of top bar internal layer steelframe 1, casting concrete is added this region
Gu cushion cap 9 is embedded in basic plane when pouring, by the lower end of the upper end for internal layer steelframe 3 of getting out of a predicament or an embarrassing situation and top bar internal layer steelframe 1
Connection, then the lower end for internal layer steelframe 3 of getting out of a predicament or an embarrassing situation is connect with substrate 91, it is auxiliarily fixed using inclined plate 92 is reinforced, using solid
Determine anchor pole 10 and internal layer steelframe 3 of getting out of a predicament or an embarrassing situation is fixedly mounted；
It C, will be outside inverted arch internal layer steelframe 5 and inverted arch according to tunnel contour line and the deformation allowance tunneling inverted arch soil body
Layer steelframe 6 is previously-joined, and then inverted arch internal layer steelframe is fixedly mounted using fixing anchor bar 10 in corresponding inverted arch border country rock
5, and inverted arch internal layer steelframe 5 and the lateral surface of the lower end for internal layer steelframe 3 of getting out of a predicament or an embarrassing situation are attached；In advance by inverted arch in this step
Internal layer steelframe 5 connect with inverted arch outer layer steelframe 6 and has the advantage that: because inverted arch internal layer steelframe 5 is in the bottommost in tunnel,
Biggish crustal stress from top to bottom is born, if only biggish deformation probably occurs for the inverted arch internal layer steelframe 5 of single layer, from
And cannot normally be matched when inverted arch outer layer steelframe 6 being caused to connect with inverted arch internal layer steelframe 5, connection can ask in advance to avoid above-mentioned
Topic, so that inverted arch steelframe 5 bears biggish crustal stress；
D, the lower end for outer layer steelframe 4 of getting out of a predicament or an embarrassing situation is connect with the upper end of inverted arch outer layer steelframe 6, while the outer layer steel that will get out of a predicament or an embarrassing situation
Frame 4 is connect with internal layer steelframe 3 of getting out of a predicament or an embarrassing situation；Interim inverted arch 7 is removed and then by the lower end of top bar outer layer steelframe 2 and leave from office
The upper end of rank outer layer steelframe 4 connects, while top bar outer layer steelframe 2 being connect with top bar internal layer steelframe 1；It leaves office in this step
Rank outer layer steelframe 4 and the erection sequence of top bar outer layer steelframe 2 successively can be adjusted according to the actual situation.
It is as why not directly being taken in the above method that the direct split of two layers of steelframe of top bar, two layers of steelframe of getting out of a predicament or an embarrassing situation is straight
Split is connect, or directlys adopt the biggish top bar steelframe of thickness, steelframe of getting out of a predicament or an embarrassing situation, is because of the how excessive construction and installation of steelframe
When also can be more difficult, and after installing two layers of steelframe of top bar in advance or two layers of steelframe of getting out of a predicament or an embarrassing situation, at this time if steel
Frame deforms, and deformed sections will be larger, is unfavorable for being adjusted the installation of subsequent steelframe, and uses present invention layering
The mode of installation, the first construction and installation of single layer steelframe are more convenient, in addition also can effectively keep away after using interim inverted arch 7, cushion cap 9
Exempt from top bar internal layer steelframe 1, internal layer steelframe 3 of getting out of a predicament or an embarrassing situation deforms, also ensure that pair of subsequent steelframe followed by installation
It is coupled together, even if some deformations occur, subsequent single layer steelframe can be also more easily adapted to conform to compared to the biggish steelframe of thickness
Property make some adjustment, for example cut, bend.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of tunnel bilayer steelframe, it is characterised in that: including the top bar internal layer steelframe (1) coincideing with tunnel top bar profile
With top bar outer layer steelframe (2), get out of a predicament or an embarrassing situation profile identical get out of a predicament or an embarrassing situation internal layer steelframe (3) and outer layer steelframe of getting out of a predicament or an embarrassing situation with tunnel
(4), the inverted arch internal layer steelframe (5) and inverted arch outer layer steelframe (6) coincideing with tunnel inverted arch profile；
The lower end of the top bar internal layer steelframe (1) and the top bar outer layer steelframe (2) is corresponding and gets out of a predicament or an embarrassing situation internal layer steelframe (3)
It is connected with the upper end for outer layer steelframe (4) of getting out of a predicament or an embarrassing situation, the lower end for getting out of a predicament or an embarrassing situation internal layer steelframe (3) is connect with basic plane, described
The get out of a predicament or an embarrassing situation upper end of inverted arch internal layer steelframe (5) of the lateral surface with nock upward of lower end of internal layer steelframe (3) is connect, the leave from office
The upper end of inverted arch outer layer steelframe (6) of the lower end of rank outer layer steelframe (4) with nock upward is connect.
2. bilayer steelframe in tunnel according to claim 1, it is characterised in that: do not install the top bar outer layer steelframe (2)
When, interim inverted arch (7) are provided between two lower ends of the top bar internal layer steelframe (1).
3. bilayer steelframe in tunnel according to claim 1, it is characterised in that: the top bar internal layer steelframe (1), it is described under
Step internal layer steelframe (3) and the lateral surface of the inverted arch internal layer steelframe (5) are all provided with standing screw (81), outside the top bar
It is all offered and the standing screw on layer steelframe (2), get out of a predicament or an embarrassing situation outer layer steelframe (4) and the inverted arch outer layer steelframe (6)
(81) mounting hole (82) cooperated.
4. bilayer steelframe in tunnel according to claim 3, it is characterised in that: the mounting hole (82) is bar shaped stepped hole,
The bar shaped stepped hole is arranged from the inside to the outside there are two reducer, and inner reducer width and the standing screw (81) one
It causes, outer reducer width is greater than inner reducer width.
5. bilayer steelframe in tunnel according to claim 1, it is characterised in that: the top bar internal layer steelframe (1) includes arc
It pushes up internal layer steelframe (11), the both ends of the arc top internal layer steelframe (11) are connect with arc top side internal layer steelframe (12)；It is corresponding described
Top bar outer layer steelframe (2) includes arc top outer layer steelframe (21), the both ends of the arc top outer layer steelframe (21) and arc top side outer layer
Steelframe (22) connection.
6. bilayer steelframe in tunnel according to claim 1, it is characterised in that: the inverted arch internal layer steelframe (5) includes arc bottom
The both ends of internal layer steelframe (51), the arc bottom internal layer steelframe (51) are connect with arc bottom side internal layer steelframe (52)；It is faced upward described in corresponding
Encircleing outer layer steelframe (6) includes arc bottom outer layer steelframe (61), the both ends of the arc bottom outer layer steelframe (61) and arc bottom side outer layer steelframe
(62) it connects.
7. bilayer steelframe in tunnel according to claim 1, it is characterised in that: it further include cushion cap (9), cushion cap (9) packet
The substrate (91) being arranged on basic plane is included, the lower end of the internal layer steelframe (3) of getting out of a predicament or an embarrassing situation is connect with substrate (91), the base
Reinforcement inclined plate (92) is provided on plate (91) to connect with the interior lateral surface of the lower end of the internal layer steelframe (3) of getting out of a predicament or an embarrassing situation.
8. bilayer steelframe in tunnel according to claim 1, it is characterised in that: the top bar internal layer steelframe (1), it is described under
Step internal layer steelframe (3) and the inverted arch internal layer steelframe (5) are connect by fixing anchor bar (10) with border country rock.
9. a kind of installation method of bilayer steelframe in tunnel as described in claim 1, characterized by the following steps:
A, the tunneling top bar soil body, corresponding top bar border country rock installation top bar internal layer steelframe (1)；
B, tunneling is got out of a predicament or an embarrassing situation the soil body, excavation get out of a predicament or an embarrassing situation the soil body when, the lower section of the lower end of corresponding top bar internal layer steelframe (1) into
Capable basis of formation plane of leveling land, then corresponding top bar border country rock installation is got out of a predicament or an embarrassing situation internal layer steelframe (3), and will be got out of a predicament or an embarrassing situation
The top and bottom correspondence of internal layer steelframe (3) is connect with the lower end of top bar internal layer steelframe (1) and basic plane；
C, the tunneling inverted arch soil body, it is first that inverted arch internal layer steelframe (5) and inverted arch outer layer steelframe (6) is previously-joined,
Then corresponding inverted arch border country rock installation inverted arch internal layer steelframe (5), and by inverted arch internal layer steelframe (5) and internal layer steelframe of getting out of a predicament or an embarrassing situation
(3) lateral surface of lower end is attached；
D, the lower end for outer layer steelframe (4) of getting out of a predicament or an embarrassing situation is connect with the upper end of inverted arch outer layer steelframe (6), while the outer layer steel that will get out of a predicament or an embarrassing situation
Frame (4) is connect with internal layer steelframe (3) of getting out of a predicament or an embarrassing situation；By the lower end of top bar outer layer steelframe (2) and the upper of outer layer steelframe (4) of getting out of a predicament or an embarrassing situation
End connection, while top bar outer layer steelframe (2) being connect with top bar internal layer steelframe (1).
10. installation method according to claim 9, it is characterised in that: in the step A, top bar internal layer steelframe (1)
It is connected between two lower ends interim inverted arch (7), in the step D, by interim inverted arch (7) when installing top bar outer layer steelframe (2)
It removes.
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| CN111219199A (en) * | 2020-01-14 | 2020-06-02 | 中国建筑第五工程局有限公司 | Arch frame yielding support structure and construction method |
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