CN114483112B - Arch leg structure, construction method and arch leg system of tunnel primary support - Google Patents
Arch leg structure, construction method and arch leg system of tunnel primary support Download PDFInfo
- Publication number
- CN114483112B CN114483112B CN202111588773.2A CN202111588773A CN114483112B CN 114483112 B CN114483112 B CN 114483112B CN 202111588773 A CN202111588773 A CN 202111588773A CN 114483112 B CN114483112 B CN 114483112B
- Authority
- CN
- China
- Prior art keywords
- steel frame
- steel
- tunnel
- arch
- primary support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 227
- 239000010959 steel Substances 0.000 claims abstract description 227
- 238000009412 basement excavation Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract description 6
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural 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 provides an arch foot structure of a tunnel primary support, which comprises the following components: a plurality of steel frames, cross diagonal braces and steel groove supporting feet; the plurality of steel frames are arranged at intervals along the axial direction of the tunnel, and at least two adjacent steel frames are arranged according to a preset height difference; the multi-truss steel frame at least comprises: the lower end of the first steel frame is mounted to a preset excavation height; the lower end of the second steel frame is arranged below the preset excavation height, namely, the second steel frame is embedded into a rock-soil body, and the lower end of the second steel frame and the lower end of the first steel frame form a height difference. The steel frame embedded in the rock-soil body can play a role in supporting and blocking the cantilever retaining wall approximately, resists the deformation pressure of lateral surrounding rock, further improves the integrity of the steel frame at the arch foot position of the primary support through the cross diagonal bracing, and diffuses the local extrusion stress of the surrounding rock on the primary support. In addition, the steel groove supporting legs can play the roles of fixing the steel frame and inhibiting the curvature change of the tail end of the steel frame, and can be reused. The method can be applied to the technical field of tunnel engineering primary support design and construction.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering primary support design and construction, and particularly relates to an arch springing structure, a construction method and an arch springing system of a tunnel primary support.
Background
In the construction process of underground engineering such as a tunnel, a step method is a common construction method, because the tunnel section is divided into a plurality of small sections, the risks of face slumping and top surrounding rock slumping in one cycle operation are reduced, a plurality of working faces can be provided for cooperative operation, mechanical transition is facilitated, and construction progress is accelerated, but the defect is that multiple disturbance is generated on the surrounding rock, so that the deformation of a arch foot steel frame unit connection point at a step is the largest, and the deformation becomes a weak point of the whole primary support. The effect of this is, on the one hand, that the lower steel frame cannot be connected smoothly according to the original design curvature due to the change of curvature of the ends of the steel frame units. On the other hand, the steel frame connecting part is locally protruded and deformed, which is not beneficial to the even laying of the lining waterproof board and the lining reinforcing steel bars, especially the secondary lining construction limit can be invaded when the extrusion deformation is serious, the engineering is forced to be reworked and replaced, the materials are wasted and the construction period is delayed.
Namely, for tunnel engineering, when the step method construction is applied to an initial support arch foot steel frame, the steel frame unit connection points are at the same horizontal height, after external disturbance factors are received, the arch foot steel frame ends are easily extruded and deformed in a combined mode, curvature change of the steel frame unit ends is further caused, the curvature change is even superior to local deformation of the steel frame, secondary lining is limited, and finally reworking and replacing are performed, so that material waste is caused.
Therefore, for the design of the arch leg part of the primary support in tunnel engineering, how to avoid the weak stress points of the primary support at the same horizontal height so as to improve the integral extrusion deformation resistance of the primary support steel frame is a technical problem which needs to be solved by the technicians in the field.
Disclosure of Invention
The invention provides a tunnel primary support arch foot structure to at least solve the technical problems.
In order to solve the above-mentioned problems, a first aspect of the present invention provides a arch leg structure of a tunnel preliminary support, the arch leg structure comprising: the plurality of steel frames are arranged at intervals along the axial direction of the tunnel, and at least two adjacent steel frames are installed according to a preset height difference; the multi-truss steel frame at least comprises: the lower end of the first steel frame is mounted to a preset excavation height; the second steel frame, the second steel frame lower extreme is installed to the preset excavation height below, the lower extreme embedding ground body of second steel frame, first steelframe with the length of second steel frame is the same, the lower extreme of second steel frame with first steelframe lower extreme forms the difference in height.
In the first aspect, the preset height difference is 30-80cm.
In a first aspect, the arch springing structure further comprises: and the longitudinal connecting structure is connected between the first steel frame and the second steel frame.
In a first aspect, the longitudinal connecting structure comprises a plurality of longitudinal connecting plates and a plurality of diagonal struts;
one or more longitudinal connecting plates and one or more diagonal braces are correspondingly connected between each first steel frame and each second steel frame; wherein,,
and if the number of the diagonal braces is two, the diagonal braces are arranged in a crossing way.
In a first aspect, the arch bar structure further includes steel channel support legs, the channel support legs including: the support plate is provided with four support feet on one side for embedding the excavated surface layer loose rock mass and fixing the position of the support plate; the other side of backup pad is provided with the mounting groove, be used for installing in the mounting groove the steelframe, mounting groove size corresponds with steelframe tip size.
In a second aspect, the invention provides a construction method of a tunnel primary support arch foot steel frame, wherein the arch foot consists of a plurality of arch foot steel frames, and the construction method comprises the following steps: after the tunnel arch foot position is excavated, one or more first steel frames are arranged at the excavated position, and the lower ends of the first steel frames are installed to a preset excavation height; one or more second steel frames are correspondingly arranged according to the positions of the first steel frames, so that the lower ends of the one or more second steel frames are correspondingly arranged below a preset excavation height and are embedded into a rock-soil body; the length of each first steel frame is the same as that of each second steel frame;
in a second aspect, the preset height difference between the first steel frame and the second steel frame is set to 30-80cm.
In a second aspect, the construction method further includes: a longitudinal connecting rib and an inclined strut are arranged between the first steel frame and the second steel frame, the inclined strut adopts a steel plate and is welded between the adjacent steel frames, and two ends of the inclined strut are correspondingly connected to the height difference positions of the first steel frame and the second steel frame respectively;
in the second aspect, when the first steel frame and the second steel frame are installed, steel groove supporting legs are paved at the lower ends of the first steel frame and the second steel frame, and the lower ends of the first steel frame and the second steel frame are correspondingly placed in the installation groove, so that the lower ends of the first steel frame and the second steel frame are conveniently fixed.
In a third aspect, the present invention provides a tunnel preliminary bracing arch leg system comprising a tunnel preliminary bracing arch leg structure as claimed in any one of the preceding claims.
The beneficial effects are that: the invention provides an arch foot structure of a tunnel primary support, which consists of a plurality of steel frames, is axially arranged along a tunnel, is designed according to a preset height difference between at least two adjacent steel frames to form a structure of leaving stubbles, and solves the technical problems that the plurality of steel frames forming the arch foot structure are arranged at equal heights and are supported in a lateral limiting manner at the lower end of the steel frame, so that the initial support of the arch foot part has poor lateral deformation resistance. The integrity of the arch foot position steel frame structure of the primary support is improved through the crossed diagonal bracing, and the method is beneficial to diffusing local extrusion stress of surrounding rock to the primary support. The steel groove supporting feet can play the roles of fixing the steel frame and inhibiting the curvature change of the tail end of the steel frame, and can be reused. The invention has simple design and construction, saves the construction cost and greatly improves the construction efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a first construction of a tunnel primary support arch leg structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a arch springing structure of a tunnel primary support according to a first embodiment of the present invention;
FIG. 3 is a third block diagram of a tunnel primary support arch leg structure in accordance with the first embodiment of the present invention;
fig. 4 is a connection structure diagram of a steel tank supporting structure and a single steel frame according to the first embodiment of the present invention;
FIG. 5 is a block diagram of a steel trough support structure in accordance with a first embodiment of the present invention;
reference numerals illustrate:
1. a longitudinal connecting plate;
2. a first steel frame;
3. a steel frame unit connecting plate;
4. diagonal bracing;
5. the second steel frame;
6. a steel tank support structure;
601. a support plate;
602. a mounting groove;
603. and supporting the feet.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
Meanwhile, in the embodiment of the present specification, when an element is referred to as being "fixed to" another element, it may be directly on the other element or may be present with an intervening element. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and the like are used in the embodiments of the present specification for the purpose of illustration only and are not intended to limit the present invention.
Based on the technical problems in the background art, the invention is based on the technical problems, and the space arrangement type, the longitudinal connection structure and the installation method of the steel frame of the arch springing part in the tunnel primary support are required to be optimally designed. The prior art is usually carried out from the idea of reinforcement, such as the steps of setting up lock foot anchor rods/pipes, reinforcing steel frame longitudinal connection, adding concrete cushion blocks to arch feet, and the like, and such reinforcing steps have become common practice for coping with extrusion deformation of the arch foot steel frame, but the following defects still exist in the process of design and construction: 1. the hole forming is difficult when the conventional foot locking anchor rod/pipe is arranged on some weak broken surrounding rock stratum, and the cost of adopting the self-advancing anchor rod/pipe is high; 2. the drilling process of the large-diameter self-advancing anchor rod/pipe takes a long time, and the large-diameter foot locking anchor rod/pipe drill working surface is required to be implemented only in a middle step and a lower step, and cannot be implemented at the arch foot of the upper step. 3. The size selection of the foot locking anchor rod/pipe and the selection of the setting angle still have great experience and blindness. 4. The longitudinal connecting ribs mainly improve the longitudinal integrity of the steel frame, and the control of the deformation of the steel frame extruded laterally is limited. 5. The round log or the steel frame diagonal bracing is additionally arranged in the tunnel, so that the internal construction space of the tunnel is occupied, the construction space can be gradually dismantled along with the pushing of the subsequent construction, and a certain degree of waste is generated. Next, the present specification will propose a technical solution for solving the above technical problem from one embodiment:
embodiment one:
as shown in fig. 1-5, a first embodiment provides a arch leg structure of a tunnel primary support, where the arch leg structure includes: the plurality of steel frames are arranged at intervals along the axial direction of the tunnel, and at least two adjacent steel frames are arranged according to a preset height difference; the multi-truss steel frame at least comprises: the lower end of the first steel frame 2 is mounted to a preset excavation height; the second steel frame 5, the second steel frame 5 lower extreme is installed to the preset excavation height below, imbeds the ground body promptly, and the difference in height is formed with the 2 lower extreme of first steelframe to the lower extreme of second steel frame 5.
In the technical scheme of the first embodiment, the arch foot structure is composed of a plurality of steel frames and is arranged along the axial direction of the tunnel, and the adjacent at least two steel frames are designed according to the preset height difference to form a stubble-retaining structure. The integrity of the arch foot position steel frame structure of the primary support is improved through the crossed diagonal bracing, and the method is beneficial to diffusing local extrusion stress of surrounding rock to the primary support. The steel groove supporting feet can play the roles of fixing the steel frame and inhibiting the curvature change of the tail end of the steel frame, and can be reused. The invention has simple design and construction, saves the construction cost and greatly improves the construction efficiency.
Specifically, for a preset height difference, the first embodiment proposes an implementation manner, which includes: the preset height difference is 30-80cm.
Further, for the arch springing structure of the above embodiment, this embodiment also proposes an implementation manner, which includes: a cross diagonal brace 4; the crossed diagonal bracing 4 can be made of steel plates and welded between adjacent steel frames, and the two ends of the diagonal bracing correspond to the height difference positions of the first steel frame and the second steel frame respectively. So as to ensure the connection stability between the first steel frame 2 and the second steel frame 5 and the integrity of the supporting structure.
Specifically, for the arch springing structure, the first embodiment also proposes an implementation, which includes the arch springing structure further includes a steel groove supporting structure 6, and the steel groove supporting structure 6 includes: the supporting plate 601, four supporting feet 603 are arranged at four corners of one surface of the supporting plate 601 and are supported on the ground; the other side of the supporting plate 601 is provided with a mounting groove 602, and the lower ends of the first steel frame and the second steel frame 5 units are arranged in the mounting groove 602.
Further, for the number of the mounting grooves 602 arranged on the supporting plate 601, the number of the steel frames applied in the single excavation supporting circulation footage can be determined, that is, the size of the supporting plate 601 and the number of the mounting grooves 602 arranged on the supporting plate 601 can be correspondingly set according to the number of the first steel frames 2 or the second steel frames 5, so that a plurality of the mounting grooves 602 arranged on the same supporting plate 601 can fix the lower ends of a plurality of the first steel frames 2 or the second steel frames 5, and the lateral stability of the lower ends of the first steel frames 2 or the second steel frames 5 is further improved.
It should be noted that, the application scenario of the first embodiment is preferably applied to a tunnel constructed by a step method, and the following is exemplified by construction of one steel frame by one excavation supporting circulation footage of the tunnel by the step method and construction of a plurality of steel frames by one excavation supporting circulation footage.
A steel frame is constructed by excavating and supporting circulation footage:
after the excavation of one circular footage at the arch foot part is completed, when the steel frame is erected, the steel frame units with the same curvature as the previous steel frame and the length being 30-80cm more are arranged.
The part with more length than the steel frame unit is buried in soil or rock mass, and the height of the tail end of the steel frame unit is 30-80cm lower than that of the tail end of the previous steel frame unit.
On one hand, due to the design that connection points of the steel frame units are staggered up and down within a range of 30-80cm, the fact that the rock-soil body at the lower end of the steel frame unit, which is buried in the step position, is too shallow is considered, so that an effective cantilever retaining effect cannot be achieved, and the construction is inconvenient when the steel frame unit is buried too deep.
After the construction of the steel frame is completed, the next construction cycle is carried out, and when the steel frame is erected, a steel frame unit with the same length and curvature as the upper steel frame is installed.
In the follow-up construction progress, the steel frame design and construction of arch springing position and so on, finally along the tunnel axis direction, the adjacent steel frame unit tie points of arch springing position are not kept at the same height, but are staggered up and down.
Other conventional measures such as reinforced meshes, sprayed concrete and the like related to the primary support of the arch springing part except the steel frame can still be normally implemented according to tunnel design, construction specifications and tunnel design drawings.
For the tunnel primary support of two-step construction, the arch foot part corresponds to the upper step and the lower step. For the primary support of the tunnel constructed by the step method, the arch foot part corresponds to the upper, middle and lower steps.
Multiple steel frames are constructed by excavating and supporting circulation footage:
the multiple steel frame units simultaneously applied in one cycle can keep the same curvature and length, the multiple steel frame units simultaneously applied in the next cycle are lengthened uniformly by 30-80cm, and the connection points of the steel frame units between adjacent cycles are staggered up and down.
In the follow-up construction progress, the steel frame unit design and construction of arch springing position and so on, finally along the tunnel axis direction, the steel frame unit tie points of adjacent circulation of arch springing position are not kept at the same height, but are staggered up and down.
Other conventional measures such as reinforced meshes, sprayed concrete and the like related to the primary support of the arch springing part except the steel frame can still be normally implemented according to tunnel design, construction specifications and tunnel design drawings.
For the tunnel primary support of two-step construction, the arch foot part corresponds to the upper step and the lower step. For the tunnel primary support constructed by the three-step method, the arch foot part corresponds to the upper, middle and lower steps.
Further, in the first embodiment, when the primary support is designed with two or more layers, the first primary support can be designed and constructed with reference to the description of the present patent.
Embodiment two:
the second embodiment provides a construction method of a tunnel primary support arch foot steel frame, wherein the arch foot is composed of a plurality of arch foot steel frames, and the construction method comprises the following steps: after the tunnel arch foot position is excavated, one or more first steel frames are arranged at the excavated position, and the lower ends of the first steel frames are installed to a preset excavation height; one or more second steel frames are correspondingly arranged according to the positions of the first steel frames, so that the lower ends of the one or more second steel frames are correspondingly arranged below a preset excavation height and are embedded into a rock-soil body; the length of each first steel frame is the same as that of each second steel frame.
Further, for a preset height difference between the first steel frame and the second steel frame, the second embodiment proposes an implementation manner, which includes: and setting the preset height difference between the first steel frame and the second steel frame to be 30-80cm.
Specifically, for the connection manner between the first steel frame and the second steel frame, the second embodiment proposes an implementation manner, which includes: the first steel frame with between the second steel frame, set up vertical connecting rib and bracing, the bracing adopts the steel sheet, welds between adjacent steel frame, and the bracing both ends correspond to first steel frame and second steel frame difference in height position respectively, and bracing and vertical connecting rib form the bearing structure who maintains a steel frame and second steel frame jointly, can make the connection between first steel frame and the second steel frame more stable, perhaps can understand, through the connected mode that combines together bracing and vertical connecting rib for the torsion resistance effect of steel frame is better.
Further, in order to ensure the installation stability of the first steel frame or the second steel frame, the second embodiment proposes an embodiment, which includes: when the steel frame is installed, steel groove supporting legs are paved at the lower end of the steel frame, the steel frame is placed in the steel groove, the end parts of the steel frame are convenient to fix, the bottoms of the first steel frame or the second steel frame are prevented from being directly contacted with a tunnel face or a rock-soil structure inside a tunnel, deformation occurs, and smooth connection of the lower steel frame units is affected.
Embodiment III:
the third embodiment of the invention provides a arch leg system of a tunnel primary support, which comprises any arch leg structure of the tunnel primary support, and a stubble-remaining structure is formed by designing at least two adjacent steel frames in the arch leg structure according to a preset height difference, so that the construction problem that steel frame connection points are easy to be extruded by surrounding rocks due to equal-height arrangement of a plurality of steel frame weak points forming the arch leg structure in the prior art is solved. In terms of mechanics, the first steel frame and the second steel frame which form the arch foot structure are arranged according to the height difference, the second steel frame which is embedded into the rock mass part can play a role of supporting and blocking similar to a cantilever retaining wall to resist the deformation pressure of lateral surrounding rock, and meanwhile, if the arch foot structure is extruded, disturbance stress is further dispersed when being transmitted along the tunnel direction, so that the stability of the arch foot structure is improved, further arch foot supporting consumable materials are saved, engineering cost is saved, construction is simple and convenient, and operation efficiency is improved.
Since the second embodiment and the first embodiment are an embodiment under the same inventive concept, the partial structures thereof are completely the same, and therefore, the structure substantially the same as that of the first embodiment in the second embodiment is not described in detail, and the detailed description thereof is omitted herein.
Finally, it should be noted that: the foregoing examples are merely illustrative of one specific embodiment of the present invention, and are not intended to limit the scope of the present invention, although the present invention has been described in detail with reference to the foregoing examples, it will be understood by those skilled in the art that the present invention is not limited thereto: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit of the corresponding technical solutions. Are intended to be encompassed within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. A tunnel primary support arch leg structure, the arch leg structure comprising:
the plurality of steel frames are arranged at intervals along the axial direction of the tunnel, and at least two adjacent steel frames are installed according to a preset height difference; the preset height difference is 30-80cm; the connection points of the adjacent steel frame units at the arch foot parts of the steel frame are arranged in an up-down staggered way; the multi-truss steel frame at least comprises:
the lower end of the first steel frame is mounted to a preset excavation height;
the second steel frame, the second steel frame lower extreme is installed to the preset excavation height below, the lower extreme embedding ground body of second steel frame, first steelframe with the length of second steel frame is different, the lower extreme of second steel frame with first steelframe lower extreme forms the difference in height.
2. A tunnel primary support arch springing structure according to claim 1, wherein said arch springing structure further comprises:
and the longitudinal connecting structure is connected between the first steel frame and the second steel frame.
3. The tunnel primary support arch springing structure of claim 2, wherein,
the longitudinal connecting structure comprises a plurality of longitudinal connecting plates and a plurality of diagonal braces;
one or more longitudinal connecting plates and one or more diagonal braces are correspondingly connected between each first steel frame and each second steel frame; wherein,,
and if the number of the diagonal braces is two, the diagonal braces are arranged in a crossing way.
4. A tunnel primary support arch leg structure according to claim 1, further comprising steel channel support legs comprising:
the support plate is provided with four support feet on one side for embedding the excavated surface layer loose rock mass and fixing the position of the support plate; the other side of backup pad is provided with the mounting groove, be used for installing in the mounting groove the steelframe, mounting groove size corresponds with steelframe tip size.
5. A method of constructing a arch springing structure for primary support of a tunnel as defined in any one of claims 1 to 4, said arch springing structure being comprised of a plurality of steel frames, said method comprising:
after the tunnel arch foot position is excavated, one or more first steel frames are arranged at the excavated position, and the lower ends of the first steel frames are installed to a preset excavation height;
one or more second steel frames are correspondingly arranged according to the positions of the first steel frames, so that the lower ends of the one or more second steel frames are correspondingly arranged below a preset excavation height, namely, are embedded into a rock-soil body; the length of each first steel frame is different from that of each second steel frame; setting a preset height difference between the first steel frame and the second steel frame to be 30-80cm; the connection points of the adjacent steel frame units at the arch foot parts of the steel frame are arranged in an up-and-down staggered way.
6. A method of constructing a tunnel primary support arch springing structure according to claim 5, further comprising:
and a longitudinal connecting plate and inclined struts are arranged between the first steel frame and the second steel frame, the inclined struts are made of steel plates and welded between the adjacent steel frames, and the two ends of the inclined struts respectively correspond to the height difference positions of the first steel frame and the second steel frame.
7. A method of constructing a tunnel primary support arch springing structure according to claim 5, further comprising:
when the first steel frame and the second steel frame are installed, steel groove supporting legs are paved at the lower ends of the first steel frame and the second steel frame, the lower ends of the first steel frame and the second steel frame are correspondingly placed in the installation groove, and the ends of the first steel frame and the second steel frame are convenient to fix.
8. An arch springing system for primary support of a tunnel, characterized in that:
the arch system comprising a tunnel primary support arch structure according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588773.2A CN114483112B (en) | 2021-12-23 | 2021-12-23 | Arch leg structure, construction method and arch leg system of tunnel primary support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588773.2A CN114483112B (en) | 2021-12-23 | 2021-12-23 | Arch leg structure, construction method and arch leg system of tunnel primary support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114483112A CN114483112A (en) | 2022-05-13 |
| CN114483112B true CN114483112B (en) | 2023-05-23 |
Family
ID=81493401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111588773.2A Active CN114483112B (en) | 2021-12-23 | 2021-12-23 | Arch leg structure, construction method and arch leg system of tunnel primary support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114483112B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004324139A (en) * | 2003-04-23 | 2004-11-18 | Ando Corp | Construction method of tunnel timbering |
| CN111636896A (en) * | 2020-06-11 | 2020-09-08 | 大连交通大学 | Submarine tunnel anti-seismic lining structure and construction method thereof |
| CN112459807A (en) * | 2020-12-09 | 2021-03-09 | 北京市政路桥股份有限公司 | Tunnel soft rock large-deformation support reinforcing device and method |
| AU2021102866A4 (en) * | 2021-05-26 | 2021-07-22 | China Railway Third Bureau Group Co., Ltd. | A method for structure reinforcement of existing tunnel lining |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4015585C1 (en) * | 1990-05-15 | 1991-11-21 | Peter Von Dipl.-Ing. 4630 Bochum De Linsingen-Heintzmann | |
| CN203130108U (en) * | 2013-03-15 | 2013-08-14 | 中铁十二局集团第二工程有限公司 | Primary support structure of reinforced tunnel |
| CN205918433U (en) * | 2016-08-24 | 2017-02-01 | 宜城大瑾实业有限公司 | Nature loess tunnel steel arching callus on sole board falls into |
| CN107387129B (en) * | 2017-07-17 | 2020-01-17 | 中路高科交通检测检验认证有限公司 | Rapid construction method for controlling extrusion type deformation of tunnel |
| CN214035702U (en) * | 2020-12-11 | 2021-08-24 | 中交一航局第三工程有限公司 | Steel arch frame for single-line tunnel three-arm rock drilling trolley inverted arch full-section excavation |
| CN112647985B (en) * | 2020-12-28 | 2022-08-12 | 中国科学院武汉岩土力学研究所 | Combined supporting device of lock pin anchor pipe/anchor rod and steel arch frame and construction method |
-
2021
- 2021-12-23 CN CN202111588773.2A patent/CN114483112B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004324139A (en) * | 2003-04-23 | 2004-11-18 | Ando Corp | Construction method of tunnel timbering |
| CN111636896A (en) * | 2020-06-11 | 2020-09-08 | 大连交通大学 | Submarine tunnel anti-seismic lining structure and construction method thereof |
| CN112459807A (en) * | 2020-12-09 | 2021-03-09 | 北京市政路桥股份有限公司 | Tunnel soft rock large-deformation support reinforcing device and method |
| AU2021102866A4 (en) * | 2021-05-26 | 2021-07-22 | China Railway Third Bureau Group Co., Ltd. | A method for structure reinforcement of existing tunnel lining |
Non-Patent Citations (1)
| Title |
|---|
| Application of a combined supporting technology with U-shaped steel support and anchor-grouting to surrounding soft rock reinforcement in roadway;Wang HuiZheng等;JOURNAL OF CENTRAL SOUTH UNIVERSITY;第25卷(第5期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114483112A (en) | 2022-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109404012B (en) | IV-VI-level surrounding rock overexcavation tunnel primary support method | |
| JP2007205161A (en) | Retaining wall and its construction method | |
| KR101649948B1 (en) | Construction Method for Circumscribed Regular Polygon Deep Foundation | |
| KR20140013497A (en) | Method for constructing block type reinforced retaining wall in cut site | |
| KR101182704B1 (en) | Construction method of undergroud structure using PHC pile | |
| CN112682048B (en) | Replacement reinforcement construction method for small clear distance up-span existing tunnel of newly-built tunnel | |
| CN114483112B (en) | Arch leg structure, construction method and arch leg system of tunnel primary support | |
| JP7303169B2 (en) | Bench construction method on slope | |
| CN105888699A (en) | Anti-settlement supporting structure of loess tunnel and construction method thereof | |
| CN210288419U (en) | Reverse column diagonal bracing reinforcing system for large-span reverse foundation pit | |
| CN116006187A (en) | Method for expanding tunnel excavation step distance | |
| CN115110966A (en) | Tunnel supporting structure and construction method | |
| JP5280150B2 (en) | Yamadome retaining wall and method of forming Yamadome retaining wall | |
| CN113417646A (en) | Large-section tunnel supporting structure suitable for Xigeda stratum and construction method | |
| CN210507009U (en) | Wide structure of shoulder barricade nation of existing road | |
| CN116446887B (en) | Tunnel construction method for existing partial collapse position of primary support section | |
| JPH07119548B2 (en) | Reinforcement structure of eyeglass type tunnel | |
| CN111379576B (en) | Method for connecting primary support and large-diameter pipe shed in shed cover construction | |
| KR20160050480A (en) | Method for Constructing Retaining Wall | |
| CN111075452A (en) | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method | |
| CN216305957U (en) | Construction structure for restraining sinking amount of primary support of tunnel based on step method excavation | |
| JP4134215B2 (en) | Horizontal frame structure and underground soil retaining support method using it | |
| CN114382104B (en) | Back-rest reinforced concrete retaining structure and construction method thereof | |
| CN221120006U (en) | Support structure of underpass | |
| KR101100074B1 (en) | Soil retaining method using h-pile for increasing vertical interval of strut |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |