CN214035702U - Steel arch frame for single-line tunnel three-arm rock drilling trolley inverted arch full-section excavation - Google Patents
Steel arch frame for single-line tunnel three-arm rock drilling trolley inverted arch full-section excavation Download PDFInfo
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- CN214035702U CN214035702U CN202022941371.3U CN202022941371U CN214035702U CN 214035702 U CN214035702 U CN 214035702U CN 202022941371 U CN202022941371 U CN 202022941371U CN 214035702 U CN214035702 U CN 214035702U
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Abstract
A steel bow member that is used for single track tunnel three-armed rock drilling platform truck area inverted arch full-face excavation relates to railway tunnel construction field. The steel arch frames are connected into a whole through longitudinal connecting steel bars, and each steel arch frame comprises an arch steel frame unit, a side wall steel frame unit and a steel frame joint for connecting all the units; the two ends of the arch steel frame unit are connected with one end of the arch steel frame unit through steel frame joints by bolts, the other end of the arch steel frame unit is connected with one end of the side wall steel frame unit through steel frame joints by bolts, and the other end of the side wall steel frame unit is lengthened by 70cm and is supported on the concrete cushion block. The utility model discloses a reasonable division of unit festival section, the biggest shear force that the country rock formed is avoided to the weak position of connecting plate atress, connects the steelframe hunch foot to lengthen 70cm in addition, avoids full section area invert excavation to cause the hunch foot unsettled, guarantees that safety and effective prevention during the construction just warp and invades the limit and change the arch. The manufacturing is easy, the assembly is rapid, and a large amount of labor, materials and time cost are saved.
Description
Technical Field
The utility model relates to a railway tunnel construction field specifically is a steel bow member that is used for the full section excavation of single track railway tunnel three-armed rock drilling platform truck area inverted arch.
Background
The full section excavation bending moment of railway single track tunnel and axial force are great, and the steelframe sets up 7 units usually, has 6 to connect, and encircles waist joint department and be located the most unfavorable department of atress, easily causes the steelframe to warp. The full-section inverted arch excavation can be closed in time to form a ring to effectively control deformation, and if the steel frame falls to the bottom according to design, the steel frame is suspended and arch falling is possibly caused.
SUMMERY OF THE UTILITY MODEL
For solving the above problem, the utility model provides a steel bow member that is used for single line tunnel three-armed rock drilling platform truck area invert full-section excavation can improve the steelframe and assemble efficiency, practice thrift the cost of labor by a wide margin.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a steel bow member that is used for single track tunnel three-armed rock drilling platform truck area inverted arch full-face excavation, its characterized in that: the steel arch frames are connected into a whole through longitudinal connecting steel bars, and each steel arch frame comprises an arch steel frame unit, a side wall steel frame unit and a steel frame joint for connecting all the units; the two ends of the arch steel frame unit are connected with one end of the arch steel frame unit through steel frame joints by bolts, the other end of the arch steel frame unit is connected with one end of the side wall steel frame unit through steel frame joints by bolts, and the other end of the side wall steel frame unit is lengthened by 70cm and is supported on the concrete cushion block.
The arch steel frame unit, the arch waist steel frame unit and the side wall steel frame unit are all made of 18-number I-steel.
The steel frame joint is made of 220mm by 16mm steel plates.
The total length of the arch steel frame units is 8014.5mm, the total length of the arch waist steel frame units is 3653.6mm, and the total length of each side wall steel frame unit is 4225.2 mm.
The utility model relates to a steel bow member that full section construction of railway single track tunnel three-arm drill jumbo was used, through the reasonable division of unit festival section, the biggest shear force that the country rock formed is avoided to the weak position of connecting plate atress, connects steelframe arch springing extension 70cm in addition, can avoid full section area invert excavation to cause the spring arch unsettled, guarantees that safe and effective prevention just props up deformation during the construction and invades the limit and trade the arch. The full-section steel frame is easy to manufacture and quick to assemble, and a large amount of labor cost, material cost and time cost can be saved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an assembly diagram of the present invention;
FIG. 3 is a schematic side view of two adjacent steel arches;
in the figure: the steel frame unit comprises an A-arch steel frame unit, a B-arch waist steel frame unit, a C-side wall steel frame unit and a 1-steel frame joint.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the specific embodiments.
Examples
The steel arch frame is used for single-track tunnel three-arm rock drilling trolley inverted arch full-section excavation, as shown in figure 3, a plurality of adjacent steel arch frames are connected through longitudinal connecting steel bars to form a whole, as shown in figure 1, each steel arch frame comprises an arch part steel frame unit A, an arch waist steel frame unit B, a side wall steel frame unit C and a steel frame joint 1 for connecting all the units; the two ends of the arch steel frame unit A are connected with one end of the arch steel frame unit B through the steel frame joint 1 through bolts, the other end of the arch steel frame unit B is connected with one end of the side wall steel frame unit C through the steel frame joint 1 through bolts, and the other end of the side wall steel frame unit C is lengthened by 70cm and is supported on the concrete cushion block.
The arch steel frame unit, the arch waist steel frame unit and the side wall steel frame unit are all made of 18-number I-steel.
The steel frame joint is made of 220mm by 16mm steel plates.
The total length of the arch steel frame units is 8014.5mm, the total length of the arch waist steel frame units is 3653.6mm, and the total length of each side wall steel frame unit is 4225.2 mm.
As shown in fig. 2, the working principle of the present invention is illustrated: the two sides are assembled in sequence and then the middle is assembled. The method comprises the following specific steps: measuring and positioning the position of each steel frame, taking 5 points of each steel frame as control points, simultaneously operating left and right auxiliary arms of the multifunctional arch truss splicing machine, clamping 1/C and 5/C sections to a design position, then using a clamp to abut against the steel frame, operating left and right working baskets, aligning the 2/B section arch truss and the 4/B section arch truss with the 1/C section and 5/C section bolt holes, installing bolts, tightly abutting the working baskets against the 2/B section and the 4/B section arch truss, clamping the 3/A section arch truss by using a middle main arm, lifting the 3/A section arch truss to a proper position, enabling the clamped arch truss to swing left and right and front and back through the action of the main arm, aligning with the installed 2/B section and 4/B section arch truss bolts, installing bolts, after splicing the arch truss, jointly matching the main arm and the left and right auxiliary arms to position the whole steel arch truss, And welding the connecting ribs. During installation, the main work task is to move the arch centering to a proper position by using the working arm, install bolts and weld and fix the steel frame by using a system anchor rod, and the arch foot support is cushioned on the concrete block. And (4) circularly installing a second truss, a third truss and the like, and longitudinally connecting the steel frames into a stressed whole by adopting connecting ribs.
The utility model relates to a steel bow member that full section construction of railway single track tunnel three-arm drill jumbo was used, through the reasonable division of unit festival section, the biggest shear force that the country rock formed is avoided to the weak position of connecting plate atress, connects steelframe arch springing extension 70cm in addition, can avoid full section area invert excavation to cause the spring arch unsettled, guarantees that safe and effective prevention just props up deformation during the construction and invades the limit and trade the arch. The full-section steel frame is easy to manufacture and quick to assemble, and a large amount of labor cost, material cost and time cost can be saved.
Claims (4)
1. A steel bow member that is used for single track tunnel three-armed rock drilling platform truck area inverted arch full-face excavation, its characterized in that: the steel arch frames are connected into a whole through longitudinal connecting steel bars, and each steel arch frame comprises an arch steel frame unit, a side wall steel frame unit and a steel frame joint for connecting all the units; the two ends of the arch steel frame unit are connected with one end of the arch steel frame unit through steel frame joints by bolts, the other end of the arch steel frame unit is connected with one end of the side wall steel frame unit through steel frame joints by bolts, and the other end of the side wall steel frame unit is lengthened by 70cm and is supported on the concrete cushion block.
2. The steel arch for inverted arch full face excavation of single-line tunnel three-armed rock drilling jumbo according to claim 1, characterized in that: the arch steel frame unit, the arch waist steel frame unit and the side wall steel frame unit are all made of 18-number I-steel.
3. The steel arch for inverted arch full face excavation of single-line tunnel three-armed rock drilling jumbo according to claim 1, characterized in that: the steel frame joint is made of 220mm by 16mm steel plates.
4. The steel arch for inverted arch full face excavation of single-line tunnel three-armed rock drilling jumbo according to claim 1, characterized in that: the total length of the arch steel frame units is 8014.5mm, the total length of the arch waist steel frame units is 3653.6mm, and the total length of each side wall steel frame unit is 4225.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022941371.3U CN214035702U (en) | 2020-12-11 | 2020-12-11 | Steel arch frame for single-line tunnel three-arm rock drilling trolley inverted arch full-section excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022941371.3U CN214035702U (en) | 2020-12-11 | 2020-12-11 | Steel arch frame for single-line tunnel three-arm rock drilling trolley inverted arch full-section excavation |
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| Publication Number | Publication Date |
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| CN214035702U true CN214035702U (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022941371.3U Active CN214035702U (en) | 2020-12-11 | 2020-12-11 | Steel arch frame for single-line tunnel three-arm rock drilling trolley inverted arch full-section excavation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483112A (en) * | 2021-12-23 | 2022-05-13 | 中国科学院武汉岩土力学研究所 | Arch foot structure, construction method and arch foot system for tunnel primary support |
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2020
- 2020-12-11 CN CN202022941371.3U patent/CN214035702U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483112A (en) * | 2021-12-23 | 2022-05-13 | 中国科学院武汉岩土力学研究所 | Arch foot structure, construction method and arch foot system for tunnel primary support |
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