CN210396759U - Tunnel preliminary bracing structure - Google Patents
Tunnel preliminary bracing structure Download PDFInfo
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- CN210396759U CN210396759U CN201920944649.7U CN201920944649U CN210396759U CN 210396759 U CN210396759 U CN 210396759U CN 201920944649 U CN201920944649 U CN 201920944649U CN 210396759 U CN210396759 U CN 210396759U
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Abstract
The utility model relates to a tunnel preliminary bracing structure, this structure include I-steel, locating plate and two stock, the vertical perpendicular to water flat line of I-steel, the locating plate with the I-steel is connected, and it is equipped with two through-holes that the horizontal direction interval set up, and the interval of two through-holes is greater than the width of I-steel, the locating plate with the I-steel is connected, and two stock are worn to locate respectively in two through-holes, with the locating plate is connected. The utility model has the advantages of strut effectual, the stock location is accurate, convenient operation is swift, low in manufacturing cost. The method improves the civilized construction quality and the safety, and is suitable for primary tunnel support.
Description
Technical Field
The utility model relates to a tunnel construction technical field especially relates to a tunnel preliminary bracing structure.
Background
After the tunnel is excavated, the initial stress field of the surrounding rock changes, a secondary stress field is formed, and the surrounding rock generates deformation pressure, loosening pressure, expansion pressure and impact pressure in the process, so that a plastic ring and an elastic ring of the surrounding rock are generated, a cavern generates convergence deformation, and instability can occur if the surrounding rock is not supported in time. The convergence deformation of the cavern is generally limited by adopting a combined supporting mode so as to enable the cavern to be in a controllable state. Meanwhile, in the process of building the tunnel, a local section is excavated by adopting a shallow-buried underground excavation construction method, and in order to strictly limit the settlement of the earth surface, the local section is usually supported by adopting a 'strong support' idea, wherein the adopted support mode is combined support. The combined support adopts a support form of 'steel arch centering (or steel grating) + anchor rod + steel bar net piece + longitudinal connecting bar + sprayed concrete', wherein the steel arch centering and the anchor rod are used as important support means, and a weak surrounding rock tunnel and a shallow tunnel are generally adopted.
The steel arch frame is high in rigidity and mainly used for supporting surrounding rock pressure, and has the following effects that ① supports surrounding rock, ② reinforces the surrounding rock, ③ improves the frictional resistance between stratums, ④ plays a role in suspension and reinforces locally unstable rock, the steel arch frame and the anchor rod form a supporting whole by welding the end of the anchor rod on the steel arch frame, the stress of a supporting system is more reasonable, the anchor rod is required to be perpendicular to the stratums as much as possible when being applied, so that the anchor rod can fully play a supporting role.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems in the prior art and providing a tunnel preliminary bracing structure and a manufacturing method thereof.
The utility model discloses a technical scheme who takes for reaching above-mentioned purpose is:
a tunnel preliminary bracing structure, comprising:
the I-shaped steel is longitudinally vertical to the horizontal line;
the positioning plate is connected with the I-shaped steel and is provided with two through holes which are arranged at intervals in the horizontal direction, and the distance between the two through holes is larger than the width of the I-shaped steel; and
and the two anchor rods are respectively penetrated in the two through holes and connected with the positioning plate.
Preferably, the positioning plate is rectangular, and the width of the positioning plate is greater than that of the I-shaped steel.
Preferably, the positioning plate is made of steel and is connected with the I-shaped steel in a welding mode.
Preferably, the inner diameters of the two through holes of the positioning plate are matched with the outer diameters of the two anchor rods.
Preferably, the two through holes are round holes, and the two anchor rods are seamless round steel tubes.
Preferably, the two anchor rods are fixedly connected with the positioning plate in a welding mode.
Preferably, the lower ends of the two anchor rods and the lower end of the I-shaped steel are in the same horizontal position.
The utility model has the advantages of substantive characteristics and apparent technological progress, the utility model discloses a tunnel preliminary bracing structure has that strut effectually, the stock location is accurate, convenient operation is swift, low in manufacturing cost. The method improves the civilized construction quality and the safety, and is suitable for primary tunnel support.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a side view of a primary tunnel supporting structure according to an embodiment of the present invention;
fig. 2 is a top view of a primary tunnel supporting structure provided by an embodiment of the present invention;
fig. 3 is a front view of a primary tunnel supporting structure provided by an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3 the embodiment of the utility model provides a pair of tunnel preliminary bracing structure includes I-steel 3, locating plate 1 and two stock 2, the vertical perpendicular to water flat line of I-steel 3, locating plate 1 with 3 fixed connection of I-steel, locating plate 1 are equipped with two through-holes 11 that the horizontal direction interval set up, the interval of two through-holes 11 is greater than the width of I-steel 3, two stock 2 wear to locate respectively in two through-holes 11, with locating plate 1 is connected.
In this embodiment, locating plate 1 sets up to the rectangle, and the width of locating plate 1 is greater than the width of I-steel 3, locating plate 1 is steel, its with I-steel 3 passes through the welding mode and is connected. The inner diameters of the two through holes 11 of the positioning plate 1 are matched with the outer diameters of the two anchor rods 2. The two through holes 11 are round holes, and the two anchor rods 2 are seamless round steel pipes. The two anchor rods 2 are fixedly connected with the positioning plate in a welding mode. The lower ends of the two anchor rods 2 and the lower end of the I-shaped steel 3 are in the same horizontal position. According to the structure, the I-shaped steel 3 can provide a large supporting force vertically to the ground, the two anchor rods 2 and the ground form an included angle smaller than 90 degrees, the included angle is penetrated through the two through holes 11 of the positioning plate 1 and is fixed, meanwhile, the lower ends of the two anchor rods 2 and the lower end of the I-shaped steel 3 are located at the same horizontal position, and therefore the lower ends of the two anchor rods 2 and the lower end of the I-shaped steel 3 form a very stable supporting shape which is approximately distributed in a triangular shape, and therefore the I-shaped steel 3 has good stability and can keep the posture of being vertically to the ground.
The utility model has the advantages of strut effectual, the stock location is accurate, convenient operation is swift, low in manufacturing cost. The method improves the civilized construction quality and the safety, and is suitable for primary tunnel support.
Claims (7)
1. A tunnel preliminary bracing structure, characterized by comprising:
the I-shaped steel is longitudinally vertical to the horizontal line;
the positioning plate is connected with the I-shaped steel and is provided with two through holes which are arranged at intervals in the horizontal direction, and the distance between the two through holes is larger than the width of the I-shaped steel; and
and the two anchor rods are respectively penetrated in the two through holes and connected with the positioning plate.
2. The preliminary tunnel support structure of claim 1, wherein: the locating plate sets up to the rectangle, and the width of locating plate is greater than the width of I-steel.
3. The preliminary tunnel support structure of claim 2, wherein: the locating plate is made of steel and is connected with the I-shaped steel in a welding mode.
4. The preliminary tunnel support structure of claim 3, wherein: the inner diameters of the two through holes of the positioning plate are matched with the outer diameters of the two anchor rods.
5. The preliminary tunnel support structure of claim 4, wherein: the two through holes are round holes, and the two anchor rods are seamless round steel tubes.
6. The preliminary tunnel support structure of claim 5, wherein: the two anchor rods are fixedly connected with the positioning plate in a welding mode.
7. The preliminary tunnel support structure of claim 6, wherein: the lower ends of the two anchor rods and the lower end of the I-shaped steel are located at the same horizontal position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944649.7U CN210396759U (en) | 2019-06-21 | 2019-06-21 | Tunnel preliminary bracing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944649.7U CN210396759U (en) | 2019-06-21 | 2019-06-21 | Tunnel preliminary bracing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210396759U true CN210396759U (en) | 2020-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920944649.7U Active CN210396759U (en) | 2019-06-21 | 2019-06-21 | Tunnel preliminary bracing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210396759U (en) |
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2019
- 2019-06-21 CN CN201920944649.7U patent/CN210396759U/en active Active
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