CN214247374U

CN214247374U - Subway engineering excavates supporting construction with pilot tunnel

Info

Publication number: CN214247374U
Application number: CN202120237230.5U
Authority: CN
Inventors: 刘松地
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-21
Anticipated expiration: 2031-01-28

Abstract

The utility model relates to the technical field of pilot tunnel supporting, in particular to a pilot tunnel excavation supporting structure for subway engineering, which comprises a bearing body, a thread bush and a hydraulic cylinder, wherein the inside of the bearing body is fixedly connected with the thread bush, the inner wall of the thread bush is movably connected with a threaded rod, the bottom end of the threaded rod is fixedly connected with a bearing, the top of the bearing is fixedly connected with a driven gear, the right side of the driven gear is movably connected with a driving gear, the top of the driving gear is fixedly connected with a stepping motor, the top of the bearing body is fixedly connected with an anchor rod, the anchor rod can be inserted into a soil layer to fix the supporting structure, the supporting structure is prevented from being unstable in supporting and collapsing, the practicability of the device is improved, a relatively compact paint film can be formed on the metal surface by antirust paint, the metal is prevented from being rusted due to the reaction of external oxygen or water and the metal, the practicability of the device is improved, and a fixing plate can provide support for the supporting structure, avoid the steel pipe area of contact undersize to lead to the holding power not enough, improved the practicality of device.

Description

Subway engineering excavates supporting construction with pilot tunnel

Technical Field

The utility model relates to a pilot tunnel supports technical field, specifically is a pilot tunnel excavation supporting construction for subway engineering.

Background

During the construction of the multi-arch tunnel, a three-pilot-hole method is often adopted for construction, namely, a middle pilot hole is firstly excavated, then an intermediate wall is constructed, and then left and right pilot holes are respectively excavated, wherein the middle pilot hole is mainly constructed for firstly constructing the intermediate wall, the construction of the subway necessarily involves the excavation of rock-soil bodies, the safety of ground buildings and underground pipelines is greatly threatened due to overlarge ground surface settlement and deformation generated in the construction process, the underground excavation station of the subway is almost all the excavation with a large section, the construction difficulty is large, and the immeasurable loss can be caused by slight errors.

When the pilot tunnel excavation, need supporting construction to strut, current supporting construction is mostly split type structure, and the dismouting is comparatively troublesome, and to the pilot tunnel of equidimension not, need use different supporting construction moreover, adaptability is more weak, and current supporting construction only can carry out the rigidity to the pilot tunnel simultaneously and support, when the vibrations are transmitted at the pilot tunnel top, in case exceed the limit that supporting construction can bear vibrations, then the most likely can take place to collapse, cause the loss of inestimable.

Therefore, how to design a guide tunnel excavation supporting structure for subway engineering becomes a problem that needs to be solved currently.

Disclosure of Invention

An object of the utility model is to provide a subway engineering excavates supporting construction with pilot tunnel to solve the current supporting construction dismouting that proposes in the above-mentioned background art troublesome, current supporting construction is difficult to bear vibrations scheduling problem.

In order to achieve the above object, the utility model provides a following technical scheme: a pilot tunnel excavation supporting structure for subway engineering comprises a bearing body, a threaded sleeve and a hydraulic cylinder, wherein the threaded sleeve is fixedly connected inside the bearing body, a threaded rod is movably connected to the inner wall of the threaded sleeve, a bearing is fixedly connected to the bottom end of the threaded rod, a driven gear is fixedly connected to the top of the bearing, a driving gear is movably connected to the right side of the driven gear, a stepping motor is fixedly connected to the top of the driving gear, a rotating shaft is fixedly connected to the left side of the bearing body, a movable rod is movably connected inside the rotating shaft, a fixing bolt is movably connected to the bottom end of the movable rod, a supporting body is fixedly connected to the top of the bearing body, the hydraulic cylinder is fixedly connected to the left side of the driven gear, a hydraulic rod is fixedly connected inside the hydraulic cylinder, a damping spring is fixedly connected to the outer wall of the hydraulic rod, and a rubber pad is fixedly connected to the top of the hydraulic rod, the top fixedly connected with telescopic link of rubber pad, the top fixedly connected with bracing piece of telescopic link, step motor's outer wall fixedly connected with motor cover.

Preferably, the bottom of the bearing is fixedly connected with a connecting block, and the bottom of the connecting block is fixedly connected with a fixing plate.

Preferably, the top of the support body is fixedly connected with an anchoring rod.

Preferably, the outer wall of the anchoring rod is fixedly connected with antirust paint.

Preferably, the screw thread cover of the internal portion of bearing body, the threaded rod of screw thread cover inner wall, the bearing of threaded rod bottom, the driven gear at bearing top, the driving gear on driven gear right side, the step motor at driving gear top, the left axis of rotation of bearing body, the inside movable rod of axis of rotation, the fixing bolt of movable rod bottom and the supporter at bearing body top constitute supporting mechanism jointly.

Preferably, the hydraulic cylinder on the left side of the driven gear, the hydraulic rod inside the hydraulic cylinder, the damping spring on the outer wall of the hydraulic rod, the rubber pad on the top of the hydraulic rod, the telescopic rod on the top of the rubber pad and the support rod on the top of the telescopic rod form the damping mechanism together.

Compared with the prior art, the beneficial effects of the utility model are that:

1. according to the guide tunnel excavation supporting structure for the subway engineering, the supporting mechanism is arranged, the stepping motor is started to drive the driving gear to rotate, the driven gear further drives the threaded rod to rotate, the movable rod is transversely limited, the threaded sleeve moves upwards in a straight line, the support body supports the guide tunnel, the guide tunnel can be supported, adjustment can be performed according to different sizes of the guide tunnel, multiple support rods are not needed to be spliced, and time waste of splicing the support rods is saved;

2. this subway engineering is with pilot tunnel excavation supporting construction, through setting up damper, when the bearing body receives the vibrations that the pilot tunnel conduction comes, can conduct vibrations to the bracing piece, then transmit the rubber pad for through the telescopic link, through the inside hydraulic oil of hydraulic stem compression pneumatic cylinder, with conduction pressure and vibrations, damping spring is also compressed by the hydraulic stem simultaneously, thereby absorb partial pressure, can weaken and cushion the vibrations of pilot tunnel conduction, thereby reinforcing supporting construction's shock resistance, reduce the influence of vibrations to the pilot tunnel.

Drawings

Fig. 1 is a schematic view of the overall structure of the device body of the present invention;

fig. 2 is a schematic structural view of the supporting mechanism of the present invention;

FIG. 3 is a schematic structural view of the damping mechanism of the present invention;

fig. 4 is a schematic structural diagram of the support body of the present invention.

In the figure: 1. a support body; 2. a motor cover; 3. connecting blocks; 4. a fixing plate; 5. an anchor rod; 6. antirust paint; 7. a threaded sleeve; 8. a threaded rod; 9. a bearing; 10. a driven gear; 11. a driving gear; 12. a stepping motor; 13. a rotating shaft; 14. a movable rod; 15. fixing the bolt; 16. a support body; 17. a hydraulic cylinder; 18. a hydraulic lever; 19. a damping spring; 20. a rubber pad; 21. a telescopic rod; 22. a support rod.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defined as "first", "second" may explicitly or implicitly include one or more such features, in the description of the invention "plurality" means two or more unless explicitly and specifically defined otherwise.

Referring to fig. 1-4, the present invention provides a technical solution: a pilot tunnel excavation supporting structure for subway engineering comprises a bearing body 1, a threaded sleeve 7 and a hydraulic cylinder 17, wherein the interior of the bearing body 1 is fixedly connected with the threaded sleeve 7, the inner wall of the threaded sleeve 7 is movably connected with a threaded rod 8, the bottom end of the threaded rod 8 is fixedly connected with a bearing 9, the top of the bearing 9 is fixedly connected with a driven gear 10, the right side of the driven gear 10 is movably connected with a driving gear 11, the top of the driving gear 11 is fixedly connected with a stepping motor 12, the left side of the bearing body 1 is fixedly connected with a rotating shaft 13, the interior of the rotating shaft 13 is movably connected with a movable rod 14, the bottom end of the movable rod 14 is movably connected with a fixing bolt 15, the top of the bearing body 1 is fixedly connected with a supporting body 16, the left side of the driven gear 10 is fixedly connected with the hydraulic cylinder 17, the interior of the hydraulic cylinder 17 is fixedly connected with a hydraulic rod 18, and the outer wall of the hydraulic rod 18 is fixedly connected with a damping spring 19, the top fixedly connected with rubber pad 20 of hydraulic stem 18, the top fixedly connected with telescopic link 21 of rubber pad 20, the top fixedly connected with bracing piece 22 of telescopic link 21, the outer wall fixedly connected with motor cover 2 of step motor 12.

Preferably, bearing 9's bottom fixedly connected with connecting block 3, the bottom fixedly connected with fixed plate 4 of connecting block 3, current supporting construction uses the steel pipe to set up mostly, make it support subaerial, thereby reach the effect of support, however, area of contact between steel pipe and the ground is less, make the steel pipe comparatively unstable as supporting, through setting up fixed plate 4, set up fixed plate 4 in the bottom of connecting block 3, make fixed plate 4 bury underground, because area of contact between fixed plate 4 and the soil is great, with the soil compaction or carry out the concrete placement after, can provide stable holding power for supporting construction, the practicality of device has been improved.

Preferably, the top fixedly connected with anchor rod 5 of supporter 16, current supporting construction is strutted the pilot tunnel top usually, however only supports through the body of rod and is difficult to carry out the stable stay to the pilot tunnel, through setting up anchor rod 5, sets up anchor rod 5 at the top of supporter 16, when supporter 16 supports the pilot tunnel, anchor rod 5 can insert the soil layer to fix supporting construction, avoid supporting construction unstable to lead to the structure to collapse, improved the practicality of device.

Preferably, anchor pole 5's outer wall fixedly connected with anti-rust paint 6, current supporting construction is mostly the metal and makes, because inside moisture and some electrolytes that contain of soil layer, it can make branch take place electrochemical reaction to make branch rust corrosion very likely, through setting up anti-rust paint 6, with the outer wall of anti-rust paint 6 spraying at anchor pole 5, make anti-rust paint 6 carry out the cladding to anchor pole 5, the fine and close film that anti-rust paint 6 formed can prevent corrosive substance's invasion, metal branch has been protected, supporting construction's life has been prolonged, the practicality of device has been improved.

Preferably, a threaded sleeve 7 inside a bearing body 1, a threaded rod 8 on the inner wall of the threaded sleeve 7, a bearing 9 at the bottom end of the threaded rod 8, a driven gear 10 on the top of the bearing 9, a driving gear 11 on the right side of the driven gear 10, a stepping motor 12 on the top of the driving gear 11, a rotating shaft 13 on the left side of the bearing body 1, a movable rod 14 inside the rotating shaft 13, a fixing bolt 15 at the bottom end of the movable rod 14 and a support body 16 on the top of the bearing body 1 jointly form a supporting mechanism, when a pilot tunnel is excavated, the supporting structure is required to be supported, most of the existing supporting structures are split structures, the dismounting is troublesome, different supporting structures are required to be used for pilot tunnels with different sizes, the adaptability is weak, and by arranging the supporting mechanism, when the pilot tunnel is required to be supported, the supporting structure is firstly placed inside the pilot tunnel, then the stepping motor 12 is started to drive the driving gear 11 fixedly connected with the supporting mechanism to rotate, because the driving gear 11 is meshed with the driven gear 10, the driving gear 11 can drive the driven gear 10 to rotate, because the driven gear 10 is fixedly connected with the threaded rod 8, the driven gear 10 can drive the threaded rod 8 to rotate, the threaded rod 8 rotates in the bearing 9, the movable rod 14 is transversely limited, the threaded sleeve 7 cannot rotate along with the threaded rod 8, the threaded sleeve 7 linearly moves upwards, the support body 16 supports the pilot hole, the rotating shaft 13 and the movable rod 14 are rotationally adjusted, the bottom of the movable rod 14 is connected with the ground, the fixed bolt 15 is driven into the ground, the movable rod 14 can be fixed, the mechanism can support the pilot hole, can be adjusted according to different sizes of the pilot holes, has better adaptability, improves the practicability of the device, and does not need to splice a plurality of rods, the time waste of branch concatenation has been saved, has improved the practicality of device.

Preferably, the hydraulic cylinder 17 on the left side of the driven gear 10, the hydraulic rod 18 inside the hydraulic cylinder 17, the damping spring 19 on the outer wall of the hydraulic rod 18, the rubber pad 20 on the top of the hydraulic rod 18, the telescopic rod 21 on the top of the rubber pad 20 and the support rod 22 on the top of the telescopic rod 21 jointly form a damping mechanism, the existing supporting structure can only rigidly support the pilot tunnel, when the vibration transmitted from the top of the pilot tunnel exceeds the limit of the vibration which can be borne by the supporting structure, collapse is very likely to occur, and an immeasurable loss is caused, by arranging the damping mechanism, because the support rod 22 is fixed inside the bearing body 1, when the bearing body 1 is subjected to the vibration transmitted from the pilot tunnel, part of the vibration can be transmitted to the support rod 22, then the vibration is transmitted to the rubber pad 20 through the telescopic rod 21, and then the hydraulic oil inside the hydraulic cylinder 17 is compressed through the hydraulic rod 18 to transmit pressure and vibration, damping spring 19 is also compressed by hydraulic stem 18 simultaneously, because rubber pad 20 has the elasticity with damping spring 19, when vibrations compress rubber pad 20 and damping spring 19, can cushion vibrations through the compression process, compressed object has the trend of recovering deformation simultaneously, can produce the restoring force opposite with pressure, thereby offset partial pressure, this mechanism can weaken and cushion the vibrations of pilot tunnel conduction, thereby strengthen supporting construction's shock resistance, reduce the influence of vibrations to the pilot tunnel, the practicality of device has been improved.

The working principle is as follows: firstly, by arranging a supporting mechanism, when a pilot hole needs to be supported, firstly, the supporting structure is placed in the pilot hole, then a stepping motor 12 is opened to drive a driving gear 11 fixedly connected with the driving gear to rotate, the driving gear 11 is meshed with a driven gear 10, the driving gear 11 can drive the driven gear 10 to rotate, the driven gear 10 can drive a threaded rod 8 to rotate due to the fixed connection of the driven gear 10 and the threaded rod 8, so that the threaded rod 8 rotates in a bearing 9, then a movable rod 14 is transversely limited, so that a threaded sleeve 7 cannot rotate along with the threaded rod 8, the threaded sleeve 7 moves upwards and linearly, a supporting body 16 supports the pilot hole, then a rotating shaft 13 and the movable rod 14 are rotated and adjusted, the bottom of the movable rod 14 is connected with the ground, and then a fixed bolt 15 is nailed into the ground, the movable rod 14 can be fixed, the mechanism can support the pilot tunnel and can be adjusted according to the size of the pilot tunnel, the mechanism has better adaptability, the practicability of the device is improved, a plurality of rods are not required to be spliced, the time waste of splicing the support rods is saved, and the practicability of the device is improved;

then, by arranging the damping mechanism, because the support rod 22 is fixed inside the support body 1, when the support body 1 is subjected to vibration transmitted from the pilot tunnel, partial vibration can be transmitted to the support rod 22, then the vibration is transmitted to the rubber pad 20 through the telescopic rod 21, then hydraulic oil in the hydraulic cylinder 17 is compressed through the hydraulic rod 18 to transmit pressure and vibration, meanwhile, the damping spring 19 is also compressed by the hydraulic rod 18, because the rubber pad 20 and the damping spring 19 have elasticity, when the rubber pad 20 and the damping spring 19 are compressed by vibration, the vibration can be buffered through the compression process, meanwhile, a compressed object has the tendency of restoring deformation, and restoring force opposite to the pressure can be generated, so as to offset partial pressure, the mechanism can weaken and buffer the vibration transmitted from the pilot tunnel, thereby enhancing the shock resistance of the support structure and reducing the influence of the vibration on the pilot tunnel, the practicability of the device is improved;

then, by arranging the fixing plate 4, the fixing plate 4 is arranged at the bottom of the connecting block 3, so that the fixing plate 4 is buried underground, and because the contact area between the fixing plate 4 and the ground is large, after soil is compacted or concrete pouring is carried out, stable supporting force can be provided for a supporting structure, and the practicability of the device is improved;

next, by arranging the anchor rod 5, the anchor rod 5 is arranged at the top of the support body 16, when the support body 16 supports the pilot tunnel, the anchor rod 5 can be inserted into the soil layer, so that the supporting structure is fixed, the structural collapse caused by the instability of the supporting structure is avoided, and the practicability of the device is improved;

finally, through setting up anti-rust paint 6, with the outer wall of anti-rust paint 6 spraying at anchor pole 5 for anti-rust paint 6 carries out the cladding to anchor pole 5, and the fine and close film that anti-rust paint 6 formed can prevent corrosive substance's invasion, has protected metal branch, has prolonged supporting construction's life, has improved the practicality of device, and this is exactly this kind of subway engineering is with guide hole excavation supporting construction's theory of operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a subway engineering excavates supporting construction with pilot tunnel, includes bearing body (1), thread bush (7) and pneumatic cylinder (17), its characterized in that: the bearing support is characterized in that a threaded sleeve (7) is fixedly connected inside the bearing support (1), a threaded rod (8) is movably connected to the inner wall of the threaded sleeve (7), a bearing (9) is fixedly connected to the bottom end of the threaded rod (8), a driven gear (10) is fixedly connected to the top of the bearing (9), a driving gear (11) is movably connected to the right side of the driven gear (10), a stepping motor (12) is fixedly connected to the top of the driving gear (11), a rotating shaft (13) is fixedly connected to the left side of the bearing support (1), a movable rod (14) is movably connected inside the rotating shaft (13), a fixing bolt (15) is movably connected to the bottom end of the movable rod (14), a support body (16) is fixedly connected to the top of the bearing support (1), and a hydraulic cylinder (17) is fixedly connected to the left side of the driven gear (10), the inside fixedly connected with hydraulic stem (18) of pneumatic cylinder (17), the outer wall fixedly connected with damping spring (19) of hydraulic stem (18), the top fixedly connected with rubber pad (20) of hydraulic stem (18), the top fixedly connected with telescopic link (21) of rubber pad (20), the top fixedly connected with bracing piece (22) of telescopic link (21).

2. The guide tunnel excavation supporting structure for subway engineering according to claim 1, characterized in that: the outer wall of the stepping motor (12) is fixedly connected with a motor cover (2).

3. The guide tunnel excavation supporting structure for subway engineering according to claim 1, characterized in that: the bottom fixedly connected with connecting block (3) of bearing (9), the bottom fixedly connected with fixed plate (4) of connecting block (3).

4. The guide tunnel excavation supporting structure for subway engineering according to claim 1, characterized in that: the top of the supporting body (16) is fixedly connected with an anchoring rod (5).

5. The guide tunnel excavation supporting structure for subway engineering according to claim 4, characterized in that: the outer wall of the anchoring rod (5) is fixedly connected with antirust paint (6).

6. The guide tunnel excavation supporting structure for subway engineering according to claim 1, characterized in that: the bearing support is characterized in that a threaded sleeve (7) inside a bearing support body (1), a threaded rod (8) on the inner wall of the threaded sleeve (7), a bearing (9) at the bottom end of the threaded rod (8), a driven gear (10) at the top of the bearing (9), a driving gear (11) on the right side of the driven gear (10), a stepping motor (12) at the top of the driving gear (11), a left rotating shaft (13) of the bearing support body (1), a movable rod (14) inside the rotating shaft (13), a fixing bolt (15) at the bottom end of the movable rod (14) and a support body (16) at the top of the bearing support body (1) jointly form a supporting mechanism.

7. The guide tunnel excavation supporting structure for subway engineering according to claim 1, characterized in that: pneumatic cylinder (17) on driven gear (10) left side, inside hydraulic stem (18) of pneumatic cylinder (17), damping spring (19) of hydraulic stem (18) outer wall, rubber pad (20) at hydraulic stem (18) top, telescopic link (21) and bracing piece (22) at telescopic link (21) top at rubber pad (20) top constitute damper jointly.