CN217151969U - Integral supporting construction in multiple arch tunnel - Google Patents
Integral supporting construction in multiple arch tunnel Download PDFInfo
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- CN217151969U CN217151969U CN202220221050.2U CN202220221050U CN217151969U CN 217151969 U CN217151969 U CN 217151969U CN 202220221050 U CN202220221050 U CN 202220221050U CN 217151969 U CN217151969 U CN 217151969U
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- 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
Abstract
The utility model discloses an integral supporting construction in even tunnel encircles for the operation of strutting of even tunnel engineering, supporting construction includes multiunit longitudinal arrangement's mirror symmetry fixed connection's hoop shaped steel bow member, and the mirror image is adjacent through Y type nodal fixation between the hoop shaped steel bow member, wear to be equipped with multiunit longitudinal profile steel bow member between multiunit longitudinal arrangement's mirror symmetry fixed connection's the hoop shaped steel bow member, and through the vertical nodal fixation of ring between longitudinal profile steel bow member and the hoop shaped steel bow member, and the mirror image is adjacent be equipped with the horizontal shaped steel bow member with longitudinal profile steel bow member vertical fixation between the hoop shaped steel bow member, directly carry out the subsection excavation and set up jointly to main hole and strut, reduced the disturbance number of times, improved tunnel and country rock stability.
Description
Technical Field
The utility model discloses be applied to the tunnel engineering field, specifically be an integral supporting construction in continuous tunnel.
Background
The multi-arch tunnel is an important structural form in tunnel engineering. Based on the structural characteristics of the multi-arch tunnel, the construction method, the supporting technology and the like of the multi-arch tunnel are greatly different from those of a conventional separated tunnel, and the multi-arch tunnel is more difficult to construct and higher in manufacturing cost under most conditions. At present, multi-arch tunnels are constructed by matching a middle hole method with a CD construction method, a CRD construction method or a double-side-wall pit guiding construction method, the method is used for constructing a large section into a small section, supporting is carried out while excavating, and the deformation control effect on surrounding rocks is good. Therefore, the method is not suitable for the ideal multi-arch tunnel construction method.
China is one of the countries with the largest tunnel and underground engineering scale, the most complex situation and the most rapid development in the world. Based on the characteristics of mountains in China and the current situation of continuous development of urban underground space in China, the clear distance of the tunnel is smaller and smaller under the conditions of terrain, geology, linearity and the like, so that a large number of engineering examples of multi-arch tunnels appear in actual engineering, and the multi-arch tunnels become an important structural form in tunnel engineering. Compared with a separated tunnel, the multi-arch tunnel has the advantages of small occupied land, small damage to the environment, shortened line length, saved construction cost and the like. However, the tunnel is in a multi-arch structure form, the span is large, the construction process is complex, the working procedures are multiple, the working procedure interference is large, and the quality of the construction technology directly influences the quality and the manufacturing cost of the whole project. The traditional multi-arch tunnel excavation method and the tunnel section supporting form have the defects, and a new supporting structure and a new construction method are urgently needed.
Disclosure of Invention
The utility model aims to solve the technical problem that to prior art not enough, provide an integral supporting construction in chain arch tunnel.
For solving the technical problem, the utility model discloses an integral supporting construction of even tunnel encircles for the operation of strutting of even tunnel engineering, supporting construction includes multiunit longitudinal arrangement's mirror symmetry fixed connection's hoop shaped steel bow member, and the mirror image is adjacent through Y type nodal fixation between the hoop shaped steel bow member, wear to be equipped with multiunit longitudinal steel bow member between multiunit longitudinal arrangement's mirror symmetry fixed connection's the hoop shaped steel bow member, and through the vertical nodal fixation of ring between longitudinal steel bow member and the hoop shaped steel bow member, and the mirror image is adjacent be equipped with the horizontal shaped steel bow member with longitudinal steel bow member vertical fixation between the hoop shaped steel bow member.
As a possible implementation manner, further, the Y-shaped node comprises a first fixing arm and a second fixing arm corresponding to the circumferential steel arch frame adjacent to the mirror image, and one end of the second fixing arm is connected with the middle section of the first fixing arm through a bolt to form a Y-shaped structure.
As a possible embodiment, the first fixing arm is further bent outward along a connection point to which the second fixing arm is connected.
As a possible implementation manner, further, one end of the first fixing arm close to the second fixing arm is bent in an arc shape, and one end of the first fixing arm far away from the second fixing arm is bent vertically.
As a possible implementation manner, further, a plurality of sets of fixing steel plates are arranged in each of the first fixing arm and the second fixing arm.
The utility model adopts the above technical scheme, following beneficial effect has: the utility model discloses directly carry out the subsection excavation and set up the joint to main hole and strut, reduced the disturbance number of times, improved tunnel and country rock stability. The primary support and the waterproof can be independently constructed, and the primary support connecting body of the adjacent chambers is used for supporting, so that the deformation control effect is good, and the waterproof effect is good. Compared with the prior construction method, the technology has less temporary support and simple working procedures; the support construction is simple and the quality is good; the excavation and supporting construction of the left and right chambers can utilize the staggered distance mode of the left and right chambers and the partition wall to separate, thereby effectively avoiding the mutual influence of cross operation and ensuring the engineering quality. The utility model discloses the problem that traditional construction method exists can effectively be solved to the technique, adapts to the double arch of china and even encircles the tunnel construction demand at most, and application prospect is wide.
Drawings
The present invention will be described in further detail with reference to the following drawings and embodiments:
FIG. 1 is a schematic view of the whole structure of the present invention;
FIG. 2 is a schematic view of the Y-shaped node structure of the present invention;
FIG. 3 is a schematic view of the cross-sectional construction sequence of the method of the present invention;
FIG. 4 is a schematic view of the construction sequence of the method part of the vertical section of the present invention.
Detailed Description
In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
As shown in fig. 1-2, the utility model provides an integral supporting construction in continuous tunnel for the operation of strutting of continuous tunnel engineering, supporting construction includes multiunit longitudinal arrangement's mirror symmetry fixed connection's hoop shaped steel bow member 1, and the mirror image is adjacent it is fixed through Y type node 2 between the hoop shaped steel bow member 1, wear to be equipped with multiunit longitudinal steel bow member 3 between multiunit longitudinal arrangement's mirror symmetry fixed connection's the hoop shaped steel bow member 1, and through the fixed of ring longitudinal node between longitudinal steel bow member 3 and the hoop shaped steel bow member 1, and the mirror image is adjacent be equipped with between the hoop shaped steel bow member 1 with the transverse shaped steel bow member 4 of longitudinal steel bow member 3 vertical fixation.
As a possible implementation manner, further, the Y-shaped node 2 includes a first fixing arm 21 and a second fixing arm 22 corresponding to the circumferential steel arch 1 adjacent in a mirror image, and one end of the second fixing arm 22 is connected with the middle section of the first fixing arm 21 through a bolt to form a Y-shaped structure. The first fixing arm 21 is bent outward along a connection point with the second fixing arm 22. The end of the first fixing arm 21 close to the second fixing arm 22 is bent in an arc shape, and the end of the first fixing arm far from the second fixing arm 22 is bent vertically. A plurality of groups of fixing steel plates 23 are arranged in the first fixing arm 21 and the second fixing arm 22.
As shown in fig. 3-4, the quick construction method of the integral supporting structure of the multi-arch tunnel comprises the following steps:
(1) and (5) preparing for construction. On the basis of being familiar with and checking a design drawing, checking the field geology, hydrology and surrounding environment; according to the field topography, a tee joint is made on the field, enough construction materials, machines and tools are prepared, and measurement lofting and other work in the early stage are made.
(2) And (5) excavating the core soil reserved on the upper step and the lower step at the staggered distance of the four pilot tunnels. Constructing a small advanced guide pipe and a pipe shed support at the design position of the periphery of the excavation outline, excavating a first pilot tunnel by adopting a reserved core soil method under the protection of the advanced support, and controlling the excavation depth to be 2-3 steel frame distances; performing primary support: primarily spraying concrete for 2-4 cm, then erecting a steel arch frame, and hanging a steel mesh on a construction anchor rod; excavating a pilot tunnel after a pilot tunnel excavation support is carried out for 3-5 m, and controlling the excavation length to be 2-3 steel frame distances; performing primary support: primarily spraying concrete for 2-4 cm, erecting a steel arch frame, constructing an anchor rod, hanging a reinforcing mesh, and re-spraying the concrete to the designed thickness of the constructed steel arch frame; after the pilot tunnel excavation support is carried out for 10m, excavating the pilot tunnel, controlling the excavation length to be 2-3 steel frame distances, and applying initial support: 2-4 cm of primary sprayed concrete, arranging a steel arch frame, and hanging a steel bar mesh on a construction anchor rod; after excavating and supporting 3-5 m of the pilot tunnel, excavating the pilot tunnel, controlling the excavating length to be 2-3 steel frame distances, and constructing primary support: and (3) primarily spraying concrete for 2-4 cm, erecting a steel arch frame, constructing an anchor rod, hanging a reinforcing mesh, and re-spraying concrete to the designed thickness of the constructed steel arch frame. As shown in fig. 3.
(3) The working procedures are circulated, and all the cavities are excavated alternately. According to the construction method, firstly, secondly, a cycle is completed by excavating the pilot tunnel to the fourth. Excavating upper earthwork by adopting manually reserved core soil, excavating through a channel reserved by a temporary inverted arch, turning into a lower step, and transporting to the outside of a tunnel through a small excavator; fourthly, excavating the earthwork at the lower part by manually matching with a small excavator, and transporting the earthwork to the outside of the hole through a small loader. And excavating the left and right chambers according to the excavation offset distance of (2-3) D (D is the span of the tunnel), wherein the specific distance can be reasonably set according to actual stratum conditions and monitoring measurement results.
(4) And erecting a profile steel frame. As shown in fig. 4. Firstly, the wall part in the primary support structure is made of I25a type I-shaped steel, and the rest parts are made of I20a type I-shaped steel, and the primary support structure is formed by accurate lofting, blanking and sectional welding; and secondly, manually installing the upper pilot tunnel section steel and transporting the upper pilot tunnel section steel by using a small flat car. The lower pilot tunnel section steel is manually matched with the small excavator for installation, the verticality of the steel frame is noticed during installation, the phenomenon that the steel frame is inclined forwards and backwards or inclined forwards and backwards is prevented, the lower pilot tunnel section steel is mechanically connected with the upper pilot tunnel steel frame, namely, a common bolt M20 is adopted for connection, and the annular steel frame and the longitudinal steel frame are also mechanically connected in the same way, so that the lower pilot tunnel section steel becomes a combined supporting structure. The form of the combined support formed by the tunnel excavation is shown in fig. 1, wherein the position and the method of the joint node of the initial combined support are also the key technology of the utility model, and the node is shown in fig. 2.
(5) And carrying out waterproof reinforcement on the primary support structure and carrying out secondary lining construction. And excavating the left and right chambers at intervals, independently constructing under the isolation of the intermediate wall, and forming a combined primary support structure. Reinforcing the upper part of the Y-shaped node, backfilling by adopting stone concrete, re-spraying to a full state, hanging a waterproof plate, constructing secondary lining concrete, and dismantling the transverse steel arch frame after completion to perform a traffic test.
The above embodiments are the embodiments of the present invention, and for those skilled in the art, according to the teaching of the present invention, the equivalent changes, modifications, replacements and variations made by the claims of the present invention should all belong to the scope of the present invention without departing from the principle and spirit of the present invention.
Claims (5)
1. The utility model provides an integral supporting construction of double arch tunnel for the operation of strutting of double arch tunnel engineering, its characterized in that: supporting construction includes multiunit longitudinal arrangement's mirror symmetry fixed connection's hoop shaped steel bow member, and the mirror image is adjacent it is fixed through Y type node to hoop shaped steel bow member between, wear to be equipped with multiunit longitudinal shaped steel bow member between multiunit longitudinal arrangement's mirror symmetry fixed connection's the hoop shaped steel bow member, and through the vertical node fixation of ring between longitudinal shaped steel bow member and the hoop shaped steel bow member, and the mirror image is adjacent be equipped with between the hoop shaped steel bow member with longitudinal shaped steel bow member vertical fixation's horizontal shaped steel bow member.
2. The integral supporting structure of the multi-arch tunnel according to claim 1, wherein: y type node includes the corresponding first fixed arm and the second fixed arm of hoop shaped steel bow member adjacent with the mirror image, second fixed arm one end passes through bolted connection with first fixed arm middle section and forms Y style of calligraphy structure.
3. The integral supporting structure of the multi-arch tunnel according to claim 2, wherein: the first fixing arm is bent outwards along a connecting point connected with the second fixing arm.
4. The integral supporting structure of the multi-arch tunnel according to claim 3, wherein: the first fixed arm is bent for the arc near second fixed arm one end, and its one end of keeping away from the second fixed arm is vertical bending.
5. The integral supporting structure of the multi-arch tunnel according to claim 4, wherein: all be equipped with multiunit fixed steel sheet in first fixed arm and the second fixed arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220221050.2U CN217151969U (en) | 2022-01-26 | 2022-01-26 | Integral supporting construction in multiple arch tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220221050.2U CN217151969U (en) | 2022-01-26 | 2022-01-26 | Integral supporting construction in multiple arch tunnel |
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| Publication Number | Publication Date |
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| CN217151969U true CN217151969U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220221050.2U Active CN217151969U (en) | 2022-01-26 | 2022-01-26 | Integral supporting construction in multiple arch tunnel |
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- 2022-01-26 CN CN202220221050.2U patent/CN217151969U/en active Active
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