CN216553958U

CN216553958U - Tunnel supporting device

Info

Publication number: CN216553958U
Application number: CN202122876539.1U
Authority: CN
Inventors: 耿萍; 王稼祥
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-05-17
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a tunnel supporting device, which has the following structure: an outer guard ring beam is arranged on the outer side of the arched supporting steel beam, a plurality of groups of outer guard ring beam plates are spliced into a half-round annular structure through first clamping pieces, and a second clamping piece is arranged at the end part of the spliced annular structure; horizontal supporting bottom plates are welded at two ends of the supporting steel beam, and a hydraulic lifting oil cylinder is arranged between the second clamping piece and the supporting bottom plates; an adjusting component is arranged between the supporting steel beam and the outer guard ring beam. The utility model has simple structure, is convenient for disassembly, transportation and field installation; and meanwhile, the tunnel supporting device is high in structural stability.

Description

Tunnel supporting device

Technical Field

The utility model belongs to the technical field of tunnel engineering, and particularly relates to a tunnel supporting device.

Background

When the tunnel passes through a weak and broken stratum, the ground stress is large, surrounding rocks show strong rheological property, a working face is unstable, and collapse can happen at any time, and sometimes self-collapse is not even dug. At the moment, if a conventional supporting method is still adopted, the deformation and collapse of the surrounding rock cannot be effectively controlled and prevented, the range of the relaxation strain of the surrounding rock is further expanded, the surrounding rock is relaxed in a wider range, the stratum state and the groundwater environment are changed, the ground surface is affected in serious conditions, the ground form is changed, and the stability and the safety of a ground building are endangered. In this case, the surrounding rock should be reinforced in advance before the tunnel construction to improve the stability of the surrounding rock, and then excavated. In weak surrounding rocks, a plurality of methods are used for improving the stability of the surrounding rocks. According to construction experience at home and abroad, a basic method for improving the stability of the surrounding rock is to control the relaxation and loss of the surrounding rock. The principle is as follows: stabilize the face, close and consolidate the stratum in time. The measures are comprehensive and complementary and are determined according to specific conditions such as the properties of the surrounding rock, the construction method and the like. In this respect, abundant experience is accumulated domestically, but still many problems exist. On one hand, the conventional advance support mode such as a pipe shed, a small conduit and other support structures has low shear rigidity, has poor support effect under the conditions of IV-level and V-level relative to broken surrounding rocks, and is more difficult to achieve the effect of improving the stability of rock masses in front of a tunnel face if meeting the ground layer developed by underground water; on the other hand, the traditional supporting method needs to be improved and perfected on the engineering and mechanization level of the construction technology.

Traditional tunnel supporting device is when using, and in tunnel supporting device was too big to be transported the tunnel, tunnel supporting device undersize led to supporting device dismouting to consume time, the not enough problem of tunnel supporting device structural stability simultaneously.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a tunnel supporting device.

The utility model discloses a tunnel supporting device, which has the following structure: the outer side of the arched supporting steel beam is provided with an outer guard ring beam, the outer guard ring beam is formed by splicing a plurality of groups of outer guard ring beam plates into an annular structure of a half circle through first clamping pieces, and a second clamping piece is arranged at the end part of the spliced annular structure.

The both ends of supporting the girder steel are welded with horizontally supporting baseplate, install hydraulic lifting hydro-cylinder between second joint spare and the supporting baseplate.

An adjusting component is arranged between the supporting steel beam and the outer guard ring beam.

Further, the outer retaining ring beam plates are arranged into 8 groups.

Furthermore, the outer retaining ring beam plate comprises an arc-shaped inner steel plate and an outer steel plate which are of concentric structures, and a supporting steel plate welded between the inner steel plate and the outer steel plate at equal intervals.

Furthermore, the first clamping piece and the second clamping piece both comprise a connecting steel plate and a clamping plate; clamping plates are fixedly arranged on the surfaces of the two sides of the connecting steel plate of the first clamping piece through welding, and clamping plates are fixedly arranged on the surface of one side of the connecting steel plate of the second clamping piece through welding;

two clamping plates are a group, and the two clamping plates are clamped on two sides of the supporting steel plate.

Furthermore, the adjusting component comprises a reverse double-threaded rod, an upper internal thread sleeve and a lower internal thread sleeve which are screwed at two ends of the reverse double-threaded rod; the one end welding that upper portion internal thread sleeve is different from reverse double-threaded pole is on the inboard surface of outer protective shroud beam board, and the telescopic one end rotation that is different from upper portion internal thread sleeve of lower part internal thread is connected with the roof, and the surface contact of roof and support girder steel.

The beneficial technical effects of the utility model are as follows:

1. through the outer protective ring roof beam that supports the girder steel outside setting, connect through first joint spare between two outer protective ring roof beams simultaneously, support simultaneously and be provided with adjusting part between girder steel and the outer protective ring roof beam, thereby be convenient for support the girder steel and support outer protective ring roof beam and the annular structure of first joint spare concatenation through adjusting part, the convenience in tunnel supporting device transportation to the tunnel has been increased, the annular structure tip of outer protective ring roof beam and the concatenation of first joint spare simultaneously passes through second joint spare and hydraulic lifting hydro-cylinder and is connected with the supporting baseplate, thereby be convenient for support the annular structure both ends of outer protective ring roof beam and the concatenation of first joint spare, thereby improved the convenience that supports the tunnel.

2. Through the adjusting part who constitutes by reverse double-threaded rod, upper portion internal thread sleeve, lower part internal thread sleeve and roof, reverse double-threaded rod's both ends are closed respectively soon in upper portion internal thread sleeve and lower part internal thread telescopic inside simultaneously, and lower part internal thread sleeve rotates with the roof to be connected, are convenient for support the girder steel and support outer retainer beam through adjusting part.

3. Through the supporting steel plate between steel sheet and the outer steel sheet including the welding, first joint spare is including the centre gripping cardboard of welding at the connecting steel sheet both sides surface simultaneously, and two centre gripping cardboards are a set of centre gripping in the both sides of supporting steel plate simultaneously to be convenient for two outer retaining ring roof beams and pass through first joint spare and connect, and the second joint spare of being convenient for supports the outer retaining ring roof beam that is located the tip like the reason, has improved the convenience of tunnel supporting construction concatenation, thereby has improved the stability that the tunnel was strutted.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of an outer shroud beam plate structure according to the present invention;

FIG. 3 is a schematic structural view of a first clip member in the present invention;

FIG. 4 is a schematic structural view of a second clip of the present invention;

FIG. 5 is a schematic view of the connection structure of the outer guard ring beam plate and the first clip of the present invention;

FIG. 6 is a schematic view of an adjustment assembly according to the present invention;

in the figure: 1. supporting the steel beam; 2. a support base plate; 3. an outer retainer beam plate; 31. an inner steel plate; 32. an outer steel plate; 33. a support steel plate; 4. a first clip member; 41. connecting steel plates; 42. clamping the clamping plate; 5. a second clip member; 6. a hydraulic lifting cylinder; 7. an adjustment assembly; 71. a reverse double threaded rod; 72. an upper internal thread sleeve; 73. a lower internal thread sleeve; 74. a top plate.

Detailed Description

The utility model is described in further detail below with reference to the figures and the detailed description.

The tunnel supporting device of the utility model is shown in figure 1, and has the structure that: the outside of arched support girder steel 1 is provided with outer guard ring roof beam, and outer guard ring roof beam splices into the annular structure of half circle by the outer guard ring roof beam board 3 of multiunit through first joint spare 4, and the annular structure tip of concatenation is provided with second joint spare 5. Horizontal supporting bottom plates 2 are welded at two ends of the supporting steel beam 1, and hydraulic lifting oil cylinders 6 are installed between the second clamping pieces 5 and the supporting bottom plates 2. An adjusting component 7 is arranged between the supporting steel beam 1 and the outer guard ring beam.

Preferably, the outer shroud beam plates 3 are arranged in 8 groups.

Further, the outer shroud beam 3, as shown in fig. 2, includes an arc-shaped inner steel plate 31 and an outer steel plate 32 having a concentric structure, and a support steel plate 33 welded between the inner steel plate 31 and the outer steel plate 32 at an equal interval.

Further, the first clamping member 4 and the second clamping member 5 each include a connecting steel plate 41 and a clamping plate 42. As shown in fig. 3, clamping plates 42 are fixed to both side surfaces of the connecting steel plate 41 of the first clamping member 4 by welding. As shown in fig. 4, a clamping plate 42 is fixed on one side surface of the connecting steel plate 41 of the second clamping member 5 by welding;

as shown in fig. 5, the clamping plates 42 are in a set of two, and the two clamping plates 42 are clamped on both sides of the support steel plate 33.

Further, as shown in fig. 6, the adjusting unit 7 includes a reverse double threaded rod 71, an upper female screw sleeve 72 and a lower female screw sleeve 73 screwed to both ends of the reverse double threaded rod 71; one end of the upper internal thread sleeve 72 different from the reverse double-threaded rod 71 is welded on the inner side surface of the outer guard ring beam plate 3, one end of the lower internal thread sleeve 73 different from the upper internal thread sleeve 72 is rotatably connected with a top plate 74, and the top plate 74 is in contact with the outer surface of the support steel beam 1.

The working principle and the using process of the utility model are as follows: during the use, transport the suitable position department in tunnel to support girder steel 1, the lower surface of supporting baseplate 2 this moment and the bottom contact in tunnel, outer guard ring beam slab 3 and first joint spare 4 splice after transporting in the tunnel simultaneously, outer guard ring beam slab 3 that lies in the tip simultaneously splices through second joint spare 5, two centre gripping cardboard 42 cards are in the both sides of supporting steel sheet 33 this moment, rotate reverse double-threaded rod 71, make the both ends of reverse double-threaded rod 71 rotatory in the inside of upper portion internal thread sleeve 72 and lower part internal thread sleeve 73, upper portion internal thread sleeve 72 and lower part internal thread sleeve 73 theory of interacting under reverse double-threaded rod 71 simultaneously, make roof 74 and the outer surface contact who supports girder steel 1.

Claims

1. A tunnel supporting device is characterized in that an outer guard ring beam is arranged on the outer side of an arched supporting steel beam (1), the outer guard ring beam is spliced into a half-circle annular structure by a plurality of groups of outer guard ring beam plates (3) through first clamping pieces (4), and second clamping pieces (5) are arranged at the end parts of the spliced annular structure;

horizontal supporting bottom plates (2) are welded at two ends of the supporting steel beam (1), and a hydraulic lifting oil cylinder (6) is arranged between the second clamping piece (5) and the supporting bottom plates (2);

an adjusting component (7) is arranged between the supporting steel beam (1) and the outer guard ring beam.

2. The tunnel support device according to claim 1, characterized in that the outer retainer beam panels (3) are arranged in 8 groups.

3. The tunnel support device according to claim 1, wherein the outer retainer beam plate (3) comprises arc-shaped inner and outer steel plates (31, 32) having a concentric structure, and support steel plates (33) welded at equal intervals between the inner and outer steel plates (31, 32).

4. A tunnel supporting device according to claim 3, characterised in that the first (4) and second (5) clips each comprise a connecting steel plate (41) and a clamping clip (42); clamping plates (42) are fixedly welded on the surfaces of the two sides of a connecting steel plate (41) of the first clamping piece (4), and clamping plates (42) are fixedly welded on the surface of one side of the connecting steel plate (41) of the second clamping piece (5);

the two clamping plates (42) are a group, and the two clamping plates (42) are clamped at two sides of the supporting steel plate (33).

5. The tunnel support device according to claim 1, characterized in that the adjusting assembly (7) comprises a reverse double threaded rod (71), an upper internally threaded sleeve (72) and a lower internally threaded sleeve (73) screwed on both ends of the reverse double threaded rod (71); one end of the upper internal thread sleeve (72), different from the reverse double-threaded rod (71), is welded on the inner side surface of the outer guard ring beam plate (3), one end of the lower internal thread sleeve (73), different from the upper internal thread sleeve (72), is rotatably connected with a top plate (74), and the top plate (74) is in contact with the outer surface of the support steel beam (1).