CN216381432U - Connecting structure of temporary inverted arch of steel arch frame - Google Patents
Connecting structure of temporary inverted arch of steel arch frame Download PDFInfo
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- CN216381432U CN216381432U CN202123041976.8U CN202123041976U CN216381432U CN 216381432 U CN216381432 U CN 216381432U CN 202123041976 U CN202123041976 U CN 202123041976U CN 216381432 U CN216381432 U CN 216381432U
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- arch
- temporary inverted
- inverted arch
- steel plate
- steel
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Abstract
The utility model relates to a connecting structure of a temporary inverted arch of a steel arch, which is used for connecting an upper permanent arch and the temporary inverted arch. The technical scheme adopted by the utility model is as follows: the device comprises a connecting part I fixed on an upper permanent arch frame and a connecting part II connected to the end part of a temporary inverted arch; the connecting part I is provided with a connecting steel plate I which is welded and fixed on the flange of the upper permanent arch frame, the connecting steel plate I is fixedly connected with the web plate of the upper permanent arch frame through a connecting and fixing steel plate, and the connecting steel plate I is provided with a bolt hole I; the connecting part II is provided with a connecting seat matched with the end part of the temporary inverted arch, the connecting seat is connected with the temporary inverted arch through a connecting shaft, the connecting shaft is arranged in a connecting hole in the temporary inverted arch in a penetrating mode, and the connecting seat is provided with a bolt hole II corresponding to the bolt hole I in the connecting steel plate I; the connecting part I and the connecting part II are connected into a whole through connecting bolts which are arranged in the bolt holes I and II in a penetrating mode.
Description
Technical Field
The utility model relates to a connecting structure of a temporary inverted arch of a steel arch frame. The steel arch support is suitable for supporting the steel arch during step excavation of the underground cavern.
Background
When the geological conditions of surrounding rocks are poor and the excavation size of a cavern is large, the excavation mode of the underground cavern is usually stepped excavation, and the support mode is a steel arch frame equal-strength support so as to meet the requirements of stability and deformation control of the underground cavern in the excavation support stage. After excavation of the upper step of the cavern is finished, the steel arch centering of the upper step can be matched with a temporary inverted arch to form an upper step arch centering support system with a closed full section, so that stability and deformation control of surrounding rocks of the upper cavern after the excavation period of the upper step and the bottom of the lower step are uncovered and before the steel arch centering of the lower step is in place are guaranteed. The connecting structure of the temporary inverted arch and the steel arch is a key component in an upper step arch closed system, if the connecting structure cannot effectively bear and transfer force, a weak part exists in the upper step arch closed system, so that the arch closed system is influenced to play a role in supporting, and the stability or deformation control of surrounding rocks of a cavern is influenced; if connection structure is too complicated, then can increase interim bow member construction degree of difficulty, influence the construction progress, be difficult to reuse then can increase the engineering investment.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: in view of the above-mentioned problems, a connection structure of a temporary inverted arch of a steel arch is provided.
The technical scheme adopted by the utility model is as follows: a connection structure of a temporary inverted arch of a steel arch for connecting an upper permanent arch and the temporary inverted arch, characterized in that: the device comprises a connecting part I fixed on an upper permanent arch frame and a connecting part II connected to the end part of a temporary inverted arch;
the connecting part I is provided with a connecting steel plate I which is welded and fixed on the flange of the upper permanent arch frame, the connecting steel plate I is fixedly connected with the web plate of the upper permanent arch frame through a connecting and fixing steel plate, and the connecting steel plate I is provided with a bolt hole I;
the connecting part II is provided with a connecting seat matched with the end part of the temporary inverted arch, the connecting seat is connected with the temporary inverted arch through a connecting shaft, the connecting shaft is arranged in a connecting hole in the temporary inverted arch in a penetrating mode, and the connecting seat is provided with a bolt hole II corresponding to the bolt hole I in the connecting steel plate I;
the connecting part I and the connecting part II are connected into a whole through connecting bolts which are arranged in the bolt holes I and II in a penetrating mode.
The connecting seat is provided with lug plates positioned on two sides of the end part of the temporary inverted arch and a connecting steel plate II fixedly connected with the lug plates and provided with the bolt hole II.
The temporary inverted arch is formed by connecting a plurality of H-shaped steel arch frames.
The end part of the temporary inverted arch is provided with a plurality of threaded rods which are tangentially arranged with the temporary inverted arch, the outer end of each threaded rod is provided with a supporting spherical surface which is used for abutting against the connecting part I, the inner end of each threaded rod is in threaded connection with the threaded sleeve, and the threaded sleeve is fixed on the temporary inverted arch.
The utility model has the beneficial effects that: the temporary inverted arch is connected with the connecting seat through the connecting shaft, and the position of the connecting seat can be properly adjusted through the connecting shaft, so that the connecting seat can be tightly connected with a connecting steel plate I on the permanent arch frame. After the temporary inverted arch is connected with the connecting steel plate I on the permanent arch frame through the connecting seat, the threaded rod is matched with the threaded sleeve to enable the threaded rod to prop against the connecting steel plate I, so that the stress of the permanent arch frame is transferred to the temporary inverted arch.
The permanent arch and the temporary inverted arch form an effective closed arch system through the connecting structure, so that the permanent arch and the temporary inverted arch are tightly attached to the excavation surface as much as possible, the arch support problem when surrounding rocks are poor and step-by-step excavation is required is successfully solved, and safe and reliable guarantee is provided for the arch support effect. Meanwhile, the temporary arch frame and the connecting structure can be repeatedly utilized, construction is convenient, and construction cost is saved.
Drawings
Fig. 1 is a schematic structural view of embodiment 1.
FIG. 2 is a schematic view showing the connection position between the upper permanent arch and the temporary inverted arch in example 1.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a sectional view B-B of fig. 2.
Fig. 5 is a cross-sectional view C-C of fig. 4.
FIG. 6 is a schematic view showing the connection position between the upper permanent arch and the temporary inverted arch in example 2.
Fig. 7 is a cross-sectional view taken along line D-D of fig. 6.
In the figure: 1. an upper permanent arch; 2. a connecting structure; 3. h-shaped steel arch centering; 4. a connecting part I; 5. a connecting member II; 6. connecting and fixing the steel plates; 7. connecting a steel plate I; 8. connecting a steel plate II; 9. an ear plate; 10. a connecting shaft; 11. a bolt hole II; 12. a lower permanent arch; 13. a threaded sleeve; 14. a threaded rod.
Detailed Description
Example 1: as shown in fig. 1, in this embodiment, an upper permanent arch is connected to a closed steel arch (the position of the fixed connection structure is flexibly set according to the field situation) through a fixed connection structure and a temporary inverted arch, the steel arch is arranged to be close to the excavation end face, and the temporary inverted arch is formed by connecting 3 h-shaped steel arches.
As shown in fig. 2, the connection structure 2 in this embodiment is divided into two parts, i, a connection member i fixed on the upper permanent arch and ii, which is connected to the end of the temporary inverted arch, wherein the connection member i has a connection steel plate i welded and fixed on the flange of the upper permanent arch, and the connection steel plate i and the web of the upper permanent arch are fixedly connected through the connection and fixation steel plate (see fig. 3); the connecting part II is provided with a connecting seat matched with the end part of the temporary inverted arch, the connecting seat is connected with the temporary inverted arch through a connecting shaft, and the connecting shaft is arranged in a connecting hole in the temporary inverted arch and a mounting hole in the connecting seat in a penetrating mode and is matched with a nut to be fixed (see figure 4).
In the embodiment, a bolt hole I is formed in the connecting steel plate I; and a bolt hole II corresponding to the bolt hole I on the connecting steel plate I is formed in the connecting seat. The connecting part I and the connecting part II are connected into a whole through connecting bolts which are commonly arranged in the bolt holes I and the bolt holes II in a penetrating mode.
The connecting seat has two otic placodes that are located interim invert tip both sides in this embodiment to and with otic placode fixed connection and set up connecting plate II of bolt hole II (see fig. 5).
The construction method of the embodiment is as follows:
a. manufacturing an upper permanent arch and a temporary inverted arch in a processing plant to form a circle of arch matched with the designed stepped section;
b. welding a connecting part I on the upper permanent arch frame, then transporting the upper permanent arch frame into a cavern, and preliminarily fixing the upper permanent arch frame on an excavation surface by adopting a waist-locking foot-locking anchor rod;
c. connecting the connecting part II with the temporary arch frame through a connecting shaft and a nut, and then transporting the connecting part II into the cavern;
d. connecting the connecting steel plates I and II by adopting connecting bolts and nuts so as to connect the temporary inverted arch with the upper permanent arch frame;
e. and after the lower permanent arch is in place and connected with the upper permanent arch, removing the connecting part II and the temporary arch, and transporting the parts to the front of the upper step for excavation for recycling.
Example 2: the structure of the present embodiment is substantially the same as that of embodiment 1, except that the present embodiment is provided with 4 threaded rods arranged tangentially to the temporary inverted arch at the end of the temporary inverted arch, the outer end of each threaded rod is a supporting spherical surface, the inner end of each threaded rod is in threaded connection with a threaded sleeve, and the threaded sleeve is fixed on the temporary inverted arch (see fig. 6). In this embodiment, the threaded rod and the threaded sleeve are disposed in a cavity formed by connecting the i-steel arch frame and the i-steel arch frame (see fig. 7).
When connecting steel sheet I, II are connected through connecting bolt and nut, will interim inverted arch and the permanent bow member in upper portion be connected the back, rotate the threaded rod and make threaded rod and swivel nut cooperation after stretch out and make it support sphere support linked steel sheet I to can make the permanent bow member in upper portion pressure that receives transmit for interim inverted arch through the threaded rod, make the structure more reliable and more stable.
Claims (4)
1. A connection structure of a temporary inverted arch of a steel arch for connecting an upper permanent arch and the temporary inverted arch, characterized in that: the device comprises a connecting part I fixed on an upper permanent arch frame and a connecting part II connected to the end part of a temporary inverted arch;
the connecting part I is provided with a connecting steel plate I which is welded and fixed on the flange of the upper permanent arch frame, the connecting steel plate I is fixedly connected with the web plate of the upper permanent arch frame through a connecting and fixing steel plate, and the connecting steel plate I is provided with a bolt hole I;
the connecting part II is provided with a connecting seat matched with the end part of the temporary inverted arch, the connecting seat is connected with the temporary inverted arch through a connecting shaft, the connecting shaft is arranged in a connecting hole in the temporary inverted arch in a penetrating mode, and the connecting seat is provided with a bolt hole II corresponding to the bolt hole I in the connecting steel plate I;
the connecting part I and the connecting part II are connected into a whole through connecting bolts which are arranged in the bolt holes I and II in a penetrating mode.
2. A connection structure of a temporary inverted arch of a steel arch according to claim 1, wherein: the connecting seat is provided with lug plates positioned on two sides of the end part of the temporary inverted arch and a connecting steel plate II fixedly connected with the lug plates and provided with the bolt hole II.
3. A connection structure of a temporary inverted arch of a steel arch according to claim 1, wherein: the temporary inverted arch is formed by connecting a plurality of H-shaped steel arch frames.
4. A connecting structure of a temporary inverted arch of a steel arch according to claim 1 or 3, wherein: the end part of the temporary inverted arch is provided with a plurality of threaded rods which are tangentially arranged with the temporary inverted arch, the outer end of each threaded rod is provided with a supporting spherical surface which is used for abutting against the connecting part I, the inner end of each threaded rod is in threaded connection with the threaded sleeve, and the threaded sleeve is fixed on the temporary inverted arch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123041976.8U CN216381432U (en) | 2021-12-06 | 2021-12-06 | Connecting structure of temporary inverted arch of steel arch frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123041976.8U CN216381432U (en) | 2021-12-06 | 2021-12-06 | Connecting structure of temporary inverted arch of steel arch frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381432U true CN216381432U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123041976.8U Active CN216381432U (en) | 2021-12-06 | 2021-12-06 | Connecting structure of temporary inverted arch of steel arch frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381432U (en) |
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2021
- 2021-12-06 CN CN202123041976.8U patent/CN216381432U/en active Active
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