CN218509504U - Integrated construction structure of tunnel open-excavation and underground excavation primary support arch - Google Patents
Integrated construction structure of tunnel open-excavation and underground excavation primary support arch Download PDFInfo
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- CN218509504U CN218509504U CN202222852797.0U CN202222852797U CN218509504U CN 218509504 U CN218509504 U CN 218509504U CN 202222852797 U CN202222852797 U CN 202222852797U CN 218509504 U CN218509504 U CN 218509504U
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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
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Abstract
The utility model discloses a tunnel is obviously done and is secretly excavated just strut and encircle integration construction structures, include: the concrete layer comprises a steel arch frame, a primary sprayed concrete layer and an arch protection concrete layer; the steel arch comprises a plurality of groups of primary steel arches and a plurality of groups of auxiliary steel arches; the plurality of groups of primary steel arch frames are respectively fixed on the erection surface, and the plurality of groups of primary steel arch frames are respectively erected at the inner side part of the primary sprayed concrete layer; the plurality of groups of the reinforcing steel arch frames are respectively erected at the outer side part of the primary sprayed concrete layer at intervals and are fixedly connected with each other; the arch protection concrete layer is poured on the outer side of the primary spraying concrete layer. The technical problem that in the prior art, when an arch protection is additionally arranged on a tunnel, a temporary arch support structure still needs to be erected, and therefore the temporary steel frame formwork support and temporary arch dismantling process are complex is solved.
Description
Technical Field
The utility model relates to a tunnel construction technical field particularly, relates to a tunnel of being applied to shallow section of burying tunnel work progress is obviously done the undercut and is just strutted and encircle integration construction structure.
Background
At present, with the rapid development of high-speed rail construction, a high-speed rail network is gradually encrypted. The elevation of the railway track is greatly influenced by the existing station, the factors of high-speed railway items are more considered in the design route selection stage, and meanwhile, after route selection is completed, the tunnel arrangement position is easily influenced by bad geographical factors, so that the conditions that partial tunnel mouths have bias voltage, tunnel bodies have shallow sections and the like are caused. Among the prior art, generally can pass through the form that sets up the fender arch or add the open cut tunnel to bad special geographical position like this to this reduces the operation risk, but actually influences great to technical degree of difficulty and progress in the work progress, especially still need set up interim bow member bearing structure before the fender arch concrete placement, and interim steelframe formwork support and interim bow member demolish the process loaded down with trivial details.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a tunnel is obviously done and is dug preliminary bracing arch integration construction structures to when setting up the fender arch in the tunnel among the solution prior art, still need to set up interim bow member bearing structure, and the loaded down with trivial details technical problem of process is demolishd to interim steelframe template support and interim bow member that lead to.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a tunnel is made secretly and is dug primary support and encircle integration construction structure openly, includes:
the concrete layer comprises a steel arch frame, a primary sprayed concrete layer and an arch protection concrete layer;
the steel arch comprises a plurality of groups of primary steel arches and a plurality of groups of auxiliary steel arches;
the plurality of groups of the primary support steel arches are respectively fixed on the erection surface, and the plurality of groups of the primary support steel arches are respectively erected on the inner side part of the primary sprayed concrete layer;
the plurality of groups of the repair steel arches are respectively erected at the outer side part of the primary sprayed concrete layer at intervals and are fixedly connected with one another;
and the arch protection concrete layer is poured on the outer side part of the primary spraying concrete layer.
On the basis of the above technical solution, it is right that the present invention is further explained as follows:
as a further proposal of the utility model, the utility model also comprises a steel frame inner mould layer;
the steel frame inner mould layer can be fixedly connected with the inner side parts of the primary steel arch frames in a separable mode.
As a further proposal of the utility model, the inner mould layer of the steel frame is installed on the basis of the annular erection surface of the wooden mould plate with the width of 30cm, the thickness of 5cm and the length of 2-3 m;
and the spraying thickness of the primary sprayed concrete layer is 4cm higher than that of the primary support steel arch frame.
As a further proposal of the utility model, the utility model also comprises a lock pin anchor pipe;
and the plurality of groups of the primary support steel arch frames are respectively fixed on the erection surface through the locking anchor pipes.
As a further proposal of the utility model, a plurality of groups the repair steel arch center is welded and fixed through the longitudinal connecting rib.
As a further proposal of the utility model, the utility model also comprises an arch protection outer mould layer;
the arch protection outer mold layer is detachably and fixedly connected to the outer side part of the primary sprayed concrete layer.
As a further aspect of the utility model, the fender encircles the outer mould layer with just spout and have preset high interval between the concrete layer, it pours and locates to protect encircles the concrete layer protect the outer mould layer with just spout inside the high interval between the concrete layer.
The utility model discloses following beneficial effect has:
the device carries out the foundation support through steel bow member, lock foot anchor pipe and the construction of just spouting the concrete layer, utilize just spouting the concrete layer simultaneously and set up as the basis and protect hunch concrete layer, avoided setting up interim bow member bearing structure, make the structure more be favorable to whole atress, reduce the hunch portion and warp, on showing the basis that has improved structure global rigidity and security, whole economic nature is strong, need not interim steelframe template and supports and demolish the process, construction efficiency and construction progress have been improved.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and the structures, proportions, sizes, etc. shown in the present specification are only used to match the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and any modifications of the structures, changes of the proportion relations, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present invention without affecting the functions and the achievable objects of the present invention.
FIG. 1 is the embodiment of the utility model provides a tunnel is made secretly and is made preliminary bracing arch integrated construction structure's schematic structure diagram
Fig. 2 is a schematic construction structure diagram of step S1 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the utility model.
Fig. 3 is one of the schematic construction structural diagrams of step S3 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the present invention.
Fig. 4 is a second schematic construction diagram of step S3 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method according to the embodiment of the present invention.
Fig. 5 is a schematic construction structure diagram of step S4 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the present invention.
Fig. 6 is a schematic construction structure diagram of step S5 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the present invention.
Fig. 7 is a schematic construction structure diagram of step S6 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the present invention.
Fig. 8 is a schematic construction structure diagram of step S7 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the present invention.
Fig. 9 is a schematic construction structure diagram of step S8 of the tunnel open-tunneling and underground-excavation primary support arch integrated construction method provided by the embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the steel arch frame 1, the lock foot anchor pipe 2, the steel frame inner mould layer 3, the primary shotcrete layer 4, the arch protection outer mould layer 5, the arch protection concrete layer 6, the arch protection backfill layer 7.
Open cut tunnel arch protection 9, original ground line a and side slope b.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right" and "middle" are used for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof without substantial changes in the technical content should be regarded as the scope of the present invention.
As shown in fig. 2, the embodiment of the utility model provides a tunnel is obviously done and is secretly strutted just and encircle integration construction structures, including steel bow member 1, lock foot anchor pipe 2, steelframe inner mould layer 3, just spout concrete layer 4, protect and encircle outer mould layer 5 and protect and encircle concrete layer 6, be used for through steel bow member 1, lock foot anchor pipe 2 and just spout concrete layer 4 construction and carry out the foundation support, utilize just spouting concrete layer 4 to set up as the basis and protect encircleed concrete layer 6 simultaneously, avoided setting up interim bow member bearing structure, make the structure more be favorable to whole atress, reduce the hunch portion and warp, on showing the basis that has improved whole rigidity of structure and security, whole economic nature is strong, need not interim steelframe template support and demolish the process, construction efficiency and construction progress have been improved. The specific settings are as follows:
the steel arch 1 comprises a plurality of groups of primary steel arches and a plurality of groups of auxiliary steel arches; wherein, a plurality of groups just prop up the steel bow member and pass through respectively lock foot anchor pipe 2 is fixed in erects the face, and a plurality of groups just prop up the steel bow member and erect respectively in just spout the inside portion on concrete layer 4, the separable rigid coupling in steelframe inner mould layer 3 sets up in a plurality of groups just prop up the inside portion of steel bow member for through just propping up the steel bow member as the installation basis of spouting concrete layer 4 just, spout concrete layer 4's spacing basis through steelframe inner mould layer 3 as just simultaneously.
The repair steel arches are erected on the outer side portions of the primary concrete spraying layers 4 respectively, and are welded and fixed through longitudinal connecting ribs, the repair steel arches are used as installation bases of the arch protection concrete layers 6 through the primary concrete spraying layers 4, the overall structural performance is improved by means of the repair steel arches, overall stress is facilitated, arch portion deformation is reduced, and overall structural rigidity and safety are improved remarkably.
Specifically, the outer side part of the primary spraying concrete layer 4 is detachably and fixedly connected with an arch protection outer mold layer 5, a preset height interval is formed between the arch protection outer mold layer 5 and the primary spraying concrete layer 4, and the arch protection concrete layer 6 is poured and arranged inside the height interval between the arch protection outer mold layer 5 and the primary spraying concrete layer 4 so as to realize arch protection addition without setting up a temporary arch support structure, so that the economical efficiency is high.
The steel frame inner mold layer 3 is installed on the basis of a wood formwork annular erection surface with the width of 30cm, the thickness of 5cm and the length of 2-3 m.
The spraying thickness of the primary sprayed concrete layer 4 is 4cm higher than that of the primary support steel arch frame.
As shown in fig. 2 to 9, the embodiment of the present invention further provides an integrated tunnel open-excavation and primary support arch construction method, which is used to firstly construct the steel arch frame 1, the foot-locking anchor pipe 2 and the primary sprayed concrete layer 4, and then construct the arch protection concrete layer 6 on the basis of the primary sprayed concrete layer 4 for pouring, so that the structure is more favorable for overall stress, the deformation of the arch part is reduced, and the overall rigidity and safety of the structure are significantly improved; meanwhile, a temporary arch support structure erected before the arch protection concrete layer 6 is poured is cancelled, and a steel arch 1 structure for primary support is used for supporting, so that the supporting and dismantling processes of a temporary steel frame template are effectively reduced. The method specifically comprises the following steps:
s1: retesting the open cut tunnel arch 9 of the open cut tunnel section corresponding to the original ground line a, retesting and lofting the design cross section, and determining the soil covering depth from the tunnel top of the open cut tunnel section to the original ground line a and the open cut tunnel range (refer to fig. 2);
s2: carrying out pit detection excavation on the foundation of the open cut tunnel arch protection 9 for changing the open cut tunnel into the hidden tunnel construction, determining the integral depth of the excavation after the excavation, and making an angle for the subsequent additional arch protection construction;
s3: excavating the vault of the open cut tunnel arch protection 9 to the foundation of the open cut tunnel arch protection 9, reserving partial soil on the step of the open cut tunnel arch protection 9 to serve as the foundation for subsequent arch protection construction support, changing the open cut tunnel into V-level surrounding rock to form a side slope b, correspondingly processing a primary steel arch in the steel arch 1, and installing the primary steel arch of the steel arch 1 after the excavation is finished (refer to fig. 3 to 4);
s4: applying a locking anchor pipe 2 at the bottom side end of the primary steel arch and grouting, after grouting, annularly installing the inner side of the primary steel arch on the ground by using a wood template with the width of 30cm, the thickness of 5cm and the length of 2-3 m, and fixing the wood template to form a steel frame inner mold layer 3 (refer to fig. 5);
s5: after the steel frame inner mold layer 3 is fixed, C25 concrete is sprayed from the outer side of the primary steel arch by a wet spraying manipulator, and the spraying thickness exceeds 4cm of the primary steel arch to form a primary sprayed concrete layer 4 (refer to fig. 6);
s6: installing a plurality of groups of reinforcing steel arch frames at intervals on the outer side of the primary sprayed concrete layer 4, welding and installing the plurality of groups of reinforcing steel arch frames by adopting longitudinal connecting ribs, installing an arch protection outer mold layer 5 on the outer side of each reinforcing steel arch frame by utilizing a wood mold after the reinforcing steel arch frame is installed, and reserving an arch protection concrete layer 6 pouring space between the arch protection outer mold layer 5 and the outer side of the primary sprayed concrete layer 4 (refer to fig. 7);
s7: after the arch protection outer mold layer 5 is installed, concrete is poured in the reserved pouring space by using an overhead pump to form an arch protection concrete layer 6, and after the arch protection concrete layer 6 is poured, the steel frame inner mold layer 3 and the arch protection outer mold layer 5 are removed (refer to fig. 8);
s8: and (3) carrying out layered backfilling by adopting graded broken stones until the distance between the graded broken stones and the vault is not less than 2m (refer to fig. 9).
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. The utility model provides a tunnel is openly done and is dug just strut and encircle integrated construction structure which characterized in that includes:
the concrete layer comprises a steel arch frame, a primary sprayed concrete layer and an arch protection concrete layer;
the steel arch comprises a plurality of groups of primary steel arches and a plurality of groups of auxiliary steel arches;
the plurality of groups of primary steel arch frames are respectively fixed on the erection surface, and the plurality of groups of primary steel arch frames are respectively erected at the inner side part of the primary sprayed concrete layer;
the plurality of groups of the repair steel arches are respectively erected at the outer side part of the primary sprayed concrete layer at intervals and are fixedly connected with one another;
and the arch protection concrete layer is poured on the outer side part of the primary spraying concrete layer.
2. The tunnel open-air and underground excavation primary support arch integrated construction structure of claim 1, characterized by further comprising a steel frame inner mold layer;
the steel frame inner mould layer can be fixedly connected with the inner side parts of the primary steel arch frames in a separable mode.
3. The integrated construction structure of the open-excavation and primary support arch of the tunnel according to claim 2,
the steel frame inner mould layer is installed on the basis of a wood template annular erection surface with the width of 30cm, the thickness of 5cm and the length of 2-3 m;
and the spraying thickness of the primary spraying concrete layer is 4cm higher than that of the primary support steel arch frame.
4. The tunnel open-air and underground excavation primary support arch integrated construction structure according to claim 2, further comprising a locking anchor pipe;
and the plurality of groups of the primary support steel arch frames are respectively fixed on the erection surface through the locking anchor pipes.
5. The integrated construction structure of the open-excavation and primary support arch of the tunnel according to claim 4,
and a plurality of groups of the additional steel arch frames are welded and fixed through longitudinal connecting ribs.
6. The tunnel open-air and underground excavation primary support arch integrated construction structure of claim 5, characterized by further comprising an arch protection outer mold layer;
the arch protection outer mold layer is detachably and fixedly connected to the outer side part of the primary sprayed concrete layer.
7. The integrated construction structure of the open-excavation and primary support arch of the tunnel according to claim 6,
the arch protection outer mold layer and the primary spraying concrete layer are arranged at a preset height interval, and the arch protection concrete layer is poured inside the height interval between the arch protection outer mold layer and the primary spraying concrete layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222852797.0U CN218509504U (en) | 2022-10-28 | 2022-10-28 | Integrated construction structure of tunnel open-excavation and underground excavation primary support arch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222852797.0U CN218509504U (en) | 2022-10-28 | 2022-10-28 | Integrated construction structure of tunnel open-excavation and underground excavation primary support arch |
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| Publication Number | Publication Date |
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| CN218509504U true CN218509504U (en) | 2023-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222852797.0U Active CN218509504U (en) | 2022-10-28 | 2022-10-28 | Integrated construction structure of tunnel open-excavation and underground excavation primary support arch |
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| CN (1) | CN218509504U (en) |
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- 2022-10-28 CN CN202222852797.0U patent/CN218509504U/en active Active
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