CN215761716U - Tunnel steel bow member supporting mechanism - Google Patents
Tunnel steel bow member supporting mechanism Download PDFInfo
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- CN215761716U CN215761716U CN202121902681.2U CN202121902681U CN215761716U CN 215761716 U CN215761716 U CN 215761716U CN 202121902681 U CN202121902681 U CN 202121902681U CN 215761716 U CN215761716 U CN 215761716U
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Abstract
The utility model discloses a tunnel steel arch support mechanism, which is characterized in that: the steel arch truss comprises a plurality of steel arches, two I-shaped steel beams and a plurality of frame beams; the two I-shaped steel beams are distributed in parallel at intervals, the steel arches are distributed at intervals along the length direction of the I-shaped steel beams, and the frame beams are distributed at intervals along the length direction of the I-shaped steel beams; two connecting plates are fixedly arranged at two ends of the steel arch frame respectively and are inserted into the upper side grooves of the two I-shaped steel beams respectively and fixedly connected with each other; two ends of the frame beam are respectively and fixedly provided with two upper bending sections which are inserted into the lower side grooves of the two I-shaped steel beams and are fixedly connected. The utility model can make the construction simpler and more convenient; and the problems that the instability damage of the steel arch in the tunnel support in the prior art is low in lateral rigidity and insufficient in upper and lower supporting force can be solved.
Description
Technical Field
The utility model belongs to a tunnel steel arch support mechanism.
Background
After the tunnel is excavated, because the self-stability of the surrounding rock of the soil tunnel is poor and each part is excavated and is separated by a certain distance, the steel arch frame can not be closed in a full section in a short time, and the problem of instability of the surrounding rock caused by sinking of the steel arch frame can occur. And the instability damage of the steel arch in the tunnel support is usually the problems of low lateral rigidity and insufficient up-and-down supporting force. Therefore, it is necessary to design and develop a tunnel steel arch support mechanism to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In view of one or more of the above-identified deficiencies in the prior art, the present invention provides a tunnel steel arch support mechanism.
In order to achieve the purpose, the utility model provides a tunnel steel arch support mechanism, which is characterized in that: the steel arch truss comprises a plurality of steel arches, two I-shaped steel beams and a plurality of frame beams; the two I-shaped steel beams are distributed in parallel at intervals; the steel arches are distributed at intervals along the length direction of the I-shaped steel beam, and the frame beams are distributed at intervals along the length direction of the I-shaped steel beam; two connecting plates are fixedly arranged at two ends of the steel arch frame respectively and are inserted into the upper side grooves of the two I-shaped steel beams respectively and fixedly connected with each other; two ends of the frame beam are respectively and fixedly provided with two upper bending sections which are respectively inserted into the lower side grooves of the two I-shaped steel beams and are fixedly connected.
By adopting the scheme, firstly, the steel arches, the two I-shaped steel beams and the plurality of frame beams are combined to form the omnibearing support, so that the rigidity and the effectiveness of the support are enhanced, and the problems of settlement, transverse deformation displacement and longitudinal deformation displacement are solved; secondly, the two I-shaped steel beams and the plurality of frame beams can provide stable support with enough strength for the steel arch, so that the steel arches are prevented from loosening along the transverse direction and the longitudinal direction of the two I-shaped steel beams; thirdly, the steel arch frame is inserted into the upper side grooves of the two I-shaped steel beams through the two connecting plates respectively, so that the limiting can be realized and the displacement and the deformation of the two ends of the steel arch frame can be avoided; in addition, the positioning and installation are convenient, and the construction is very convenient; and the problems that the instability damage of the steel arch in the tunnel support in the prior art is low in lateral rigidity and insufficient in upper and lower supporting force can be solved.
Preferably, the steel arch is an inverted U-shaped structure formed by bending I-shaped steel sections.
Preferably, the connecting plate is fixed with the upper side in-groove bottom wall of the I-shaped steel beam through bolts.
Preferably, the connecting plate is rectangular and is welded and fixed with the end face of the steel arch frame.
Preferably, the frame beam comprises four main steel bars and a plurality of stirrups, the four main steel bars are distributed in a rectangular shape, and the stirrups are distributed at intervals along the length direction of the steel bars and are fixedly connected with the four main steel bars.
Preferably, the stirrups are fixed on the four main reinforcing steel bars in an inner hoop mode or an outer hoop mode.
Preferably, the frame beam and the two i-shaped steel beams are fixed through concrete.
Preferably, the stirrups on the bent-up section of the frame beam are more densely distributed than the stirrups on the straight section in the middle thereof.
Further, the device also comprises a reinforcing rod; the reinforcing rod penetrates through two side walls of the upper side groove of the I-shaped steel beam and the end part of the steel arch frame, and two ends of the reinforcing rod are respectively in threaded fit with the two nuts and are locked in a two-way mode.
The utility model has the beneficial effects that:
firstly, the utility model can realize that a plurality of steel arches are additionally arranged in the primary support, can rapidly provide enough support resistance, meets the main rigidity required by the primary support, and rapidly controls the continuous relaxation of surrounding rocks and the continuous expansion of a plastic zone; excessive deformation of surrounding rocks is limited, and the stability of a tunnel supporting structure system is ensured; the problems that the instability damage of the steel arch in the tunnel support in the prior art is low in lateral rigidity and insufficient in upper and lower supporting force can be solved;
secondly, because each steel arch frame is combined with two I-shaped steel beams and a plurality of frame beams to form a combined support, the rigidity and the effectiveness of the support are enhanced, and the stress condition is good, the two I-shaped steel beams and the plurality of frame beams can provide stable support with enough strength for the steel arch frame, and the steel arch frames are prevented from moving and loosening along the transverse direction and the longitudinal direction of the two I-shaped steel beams; meanwhile, the steel arch center is respectively inserted into the upper side grooves of the two I-shaped steel beams through the two connecting plates, so that the limiting can be realized, the displacement and the deformation of the two ends of the steel arch center can be avoided, the positioning and the installation are convenient, and the construction is very convenient;
thirdly, the two upper bending sections of the frame beam are inserted into the lower side grooves of the two I-shaped steel beams and fixedly connected, so that the two I-shaped steel beams are kept parallel and have stable and reliable spacing, and the integral rigidity strength is ensured.
Drawings
Fig. 1-2 are schematic structural views of the present invention.
Fig. 3 is an enlarged view at B in fig. 1.
Fig. 4 is an enlarged view at a in fig. 2.
Fig. 5 is a schematic structural view of the frame beam and two i-shaped steel beams of the present invention fixed by concrete.
Fig. 6 is a perspective view of the frame beam.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
example (b): referring to fig. 1 to 6, a tunnel steel arch support mechanism includes a plurality of steel arches 1, two i-beams 2, and a plurality of frame beams 3.
In this embodiment, the steel arch 1 is an inverted U-shaped structure formed by bending an i-shaped steel section. The steel arch 1 is low in cost and high in yield strength.
In this embodiment, two connecting plates 1-1 are respectively and fixedly arranged at two ends of the steel arch frame 1. Specifically, the connecting plate 1-1 is rectangular and is welded and fixed with the end face of the steel arch frame 1.
The two I-shaped steel beams 2 are distributed at intervals in parallel, the steel arches 1 are distributed at equal intervals along the length direction of the I-shaped steel beams 2, and the steel arches 1 of the frame beams 3 are distributed at equal intervals along the length direction of the I-shaped steel beams 2.
Wherein, the two connecting plates 1-1 are respectively inserted into the upper side grooves 2-1 of the two I-shaped steel beams 2 and are fixedly connected.
Because the two connecting plates 1-1 are respectively inserted into the upper side grooves 2-1 of the two I-shaped steel beams 2, the two connecting plates 1-1 cannot move close to or away from each other, and the steel arch frame 1 is prevented from left-right deviation and deformation.
Specifically, each connecting plate 1-1 is fixedly connected with the inner bottom wall of the upper side groove 2-1 of the I-shaped steel beam 2 through four bolts 4. Because the connecting plate 1-1 is inserted into the upper side groove 2-1 of the I-shaped steel beam 2 and then is fixed by the four bolts 4, the assembling is convenient, the connecting plate is firm and reliable, the construction difficulty is low, and the overall firmness and stability after the assembling are improved.
Two upper bending sections 3-1 are fixedly arranged at two ends of the frame beam 3 respectively, and the two upper bending sections 3-1 are inserted into the lower side grooves 2-2 of the two I-shaped steel beams 2 and are fixedly connected. The frame beam 3 can realize stable and firm support for two ends of the steel arch 1, enable the protection mechanism to bear higher yield strength, simultaneously enable the steel arch 1, the I-shaped steel beam 2 and the frame beam 3 to form circumferential all-dimensional protection, and solve the problems of settlement, axial deformation displacement and radial deformation displacement.
Preferably, the frame beam 3 includes four main steel bars a and a plurality of stirrups b, the four main steel bars a are distributed in a rectangular shape, and the stirrups b are distributed at intervals along the length direction of the steel bars a and are fixedly connected with the four main steel bars a.
Preferably, the stirrups b are fixed on the four main steel bars a in an inner hoop manner or an outer hoop manner.
Preferably, the frame beam 3 and the two i-beam beams 2 are fixed by concrete 6. Therefore, a rail (such as a light rail or a high-speed rail) can be arranged above the middle part of the frame beam 3, and the requirements on the foundation strength and the bearing capacity of the rail are also ensured.
Preferably, the stirrups b on the bent-up section 3-1 of the frame beam 3 are more densely distributed than the stirrups b on the middle straight section 3-2 thereof. The combination strength between the upper bending section 3-1 of the frame beam 3 and the I-shaped steel beam 2 can be improved, and the cost is reasonably reduced.
Further, a reinforcing rod 7 is also included; the reinforcing rod 7 penetrates through two side walls 2-11 of the upper side groove 2-1 of the I-shaped steel beam 2 and the end part of the steel arch 1 at the same time, and two ends of the reinforcing rod 7 are respectively in threaded fit with the two nuts 8 and are locked in a two-way mode. This prevents the i-section steel beam 2 from being loosened up and down and further improves the supporting ability.
Because each steel arch is combined with two I-shaped steel beams 2 and a plurality of frame beams 3 to form a combined support, the rigidity and the effectiveness of the support are enhanced, and the stress condition is good, the two I-shaped steel beams 2 and the plurality of frame beams 3 can provide stable support with enough strength for the steel arch, and the steel arches are prevented from loosening along the transverse direction and the longitudinal direction of the two I-shaped steel beams 2; meanwhile, the steel arch is respectively inserted into the upper side grooves of the two I-shaped steel beams 2 through the two connecting plates, so that the limiting can be realized, the displacement and the deformation of the two ends of the steel arch are avoided, the positioning and the installation are convenient, and the construction is very convenient; and the problems that the instability damage of the steel arch in the tunnel support in the prior art is low in lateral rigidity and insufficient in upper and lower supporting force can be solved.
In addition, the two bent sections 3-1 of the frame beam 3 are inserted into the lower side grooves 2-2 of the two I-shaped steel beams 2 and fixedly connected, so that the two I-shaped steel beams 2 are kept parallel, the distance between the two I-shaped steel beams is stable and reliable, and the integral rigidity strength is ensured.
Therefore, the utility model can realize that a plurality of steel arches are additionally arranged in the primary support, can rapidly provide enough support resistance, meets the main rigidity required by the primary support, and rapidly controls the continuous relaxation of surrounding rocks and the continuous expansion of a plastic zone; and the excessive deformation of surrounding rocks is limited, and the stability of a tunnel supporting structure system is ensured.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. The utility model provides a tunnel steel bow member supporting mechanism which characterized in that: comprises a plurality of steel arches (1), two I-shaped steel beams (2) and a plurality of frame beams (3);
the two I-shaped steel beams (2) are distributed in parallel at intervals; the steel arches (1) are distributed at intervals along the length direction of the I-shaped steel beam (2), and the frame beams (3) are distributed at intervals along the length direction of the I-shaped steel beam (2);
two connecting plates (1-1) are fixedly arranged at two ends of the steel arch frame (1) respectively, and the two connecting plates (1-1) are inserted into the upper side grooves (2-1) of the two I-shaped steel beams (2) respectively and are fixedly connected;
two ends of the frame beam (3) are respectively and fixedly provided with two upper bending sections (3-1), and the two upper bending sections (3-1) are respectively inserted into the lower side grooves (2-2) of the two I-shaped steel beams (2) and are fixedly connected.
2. A tunnel steel arch support mechanism of claim 1, wherein: the steel arch frame (1) is of an inverted U-shaped structure formed by bending I-shaped steel sections.
3. A tunnel steel arch support mechanism of claim 1, wherein: the connecting plate (1-1) is fixed with the inner bottom wall of the upper side groove (2-1) of the I-shaped steel beam (2) through a bolt (4).
4. A tunnel steel arch support mechanism according to any one of claims 1 to 3, wherein: the connecting plate (1-1) is rectangular and is welded and fixed with the end face of the steel arch frame (1).
5. A tunnel steel arch support mechanism of claim 1, wherein: this frame roof beam (3) includes four main reinforcing bars (a) and a plurality of stirrup (b), and these four main reinforcing bars (a) are the rectangle and distribute, each stirrup (b) are followed reinforcing bar (a) length direction interval distribution and with four main reinforcing bar (a) fixed connection.
6. A tunnel steel arch support mechanism of claim 5, wherein: and the stirrups (b) are fixed on the four main reinforcing steel bars (a) in an inner hoop mode or an outer hoop mode.
7. A tunnel steel arch support mechanism of any one of claims 1 to 3 or 5 or 6, wherein: the frame beam (3) is fixed with the two I-shaped steel beams (2) through concrete (6).
8. A tunnel steel arch support mechanism according to any one of claims 5 or 6, wherein: the stirrups (b) arranged on the upward bending section (3-1) of the frame beam (3) are distributed more densely than the stirrups (b) arranged on the middle straight section (3-2) of the frame beam.
9. A tunnel steel arch support mechanism of any one of claims 1 to 3 or 5 or 6, wherein: also comprises a reinforcing rod (7);
the reinforcing rod (7) penetrates through two side walls (2-11) of the upper side groove (2-1) of the I-shaped steel beam (2) and the end part of the steel arch frame (1) at the same time, and two ends of the reinforcing rod (7) are respectively in threaded fit with the two nuts (8) and are locked in a bidirectional mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121902681.2U CN215761716U (en) | 2021-08-15 | 2021-08-15 | Tunnel steel bow member supporting mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121902681.2U CN215761716U (en) | 2021-08-15 | 2021-08-15 | Tunnel steel bow member supporting mechanism |
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| CN215761716U true CN215761716U (en) | 2022-02-08 |
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| CN202121902681.2U Active CN215761716U (en) | 2021-08-15 | 2021-08-15 | Tunnel steel bow member supporting mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562297A (en) * | 2022-04-01 | 2022-05-31 | 中铁第一勘察设计院集团有限公司 | Rectangular steel arch frame tunnel supporting structure with honeycomb sandwich structure and profile steel combined |
-
2021
- 2021-08-15 CN CN202121902681.2U patent/CN215761716U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562297A (en) * | 2022-04-01 | 2022-05-31 | 中铁第一勘察设计院集团有限公司 | Rectangular steel arch frame tunnel supporting structure with honeycomb sandwich structure and profile steel combined |
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