Soft rock roadway drainage structure

Abstract

The invention relates to the technical field of soft rock roadway drainage, in particular to a soft rock roadway drainage structure which comprises a roadway body, drainage ditches are arranged at the bottom of the roadway body in a bilateral symmetry mode, a plurality of drainage holes are formed in the side wall of the roadway body, and drainage pipes are fixedly embedded in the drainage holes. The connecting structure of the drainage hopper, the right trapezoid frame and the drainage pipe is adopted, the drainage pipe can be tightly supported through the drainage hopper, the installation stability of the drainage pipe is guaranteed, seeping water which cannot flow out of the drainage pipe is collected, and the drainage pipe is prevented from leaking out of the roadway body. Meanwhile, the side wall of the soft rock roadway is supported through the right trapezoid frame, the structural strength of the side wall of the soft rock roadway is improved, the number of the formed drainage holes is reduced, and the adverse effect on the side wall of the soft rock roadway is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of soft rock tunnel drainage, and in particular to a soft rock tunnel drainage structure. Background Art

[0002] Soft rock tunnel refers to an underground tunnel excavated in soft rock. Soft rock is a rock with low strength, high porosity and poor cementation. In engineering classification, rocks with uniaxial compressive strength less than 20MPa are usually called soft rocks. The stability of soft rock tunnels is relatively poor because the mechanical properties of soft rock itself are relatively fragile.

[0003] In soft rock tunnels, groundwater will enter the drainage pipe through the drainage holes, and then flow into the drainage ditch. In the drainage ditch, the water will gather in the collection well. After sedimentation in the collection well, it will be discharged out of the tunnel through the drainage pipe system. This can effectively lower the groundwater level in the soft rock tunnel, reduce the softening effect of water on soft rock, and thus improve the stability of the soft rock tunnel.

[0004] The existing drainage structure guided by drainage pipes has the following problems:

[0005] 1: When using drainage pipes to drain water, it is necessary to open several drainage holes on the side walls of the soft rock tunnel. Opening a large number of drainage holes will directly affect the structural stability of the side walls of the soft rock tunnel.

[0006] 2: The structural strength of the side wall of the soft rock tunnel is low. The drainage pipe will become loose after long-term use. The loose drainage pipe will fall off. Even if it does not fall off, a large amount of seepage water will flow out from the contact gap between the drainage pipe and the side wall of the soft rock tunnel, greatly affecting the drainage effect, and further affecting the stability of the soft rock tunnel.

[0007] 3: When arranging the drainage pipes, the structural strength of the side walls of the soft rock tunnels is taken into consideration, and the drainage pipes are arranged at a certain height from the soft rock tunnels. The seepage water below the drainage pipes cannot penetrate into the drainage pipes. The accumulated pressure of this seepage water will flow directly from the contact seam below the drainage pipes and the side walls of the soft rock tunnels, which will affect the structural strength of the bottom of the soft rock tunnels over the years. Summary of the invention

[0008] Technical problem to be solved: A soft rock tunnel drainage structure provided by the present invention can solve the above-mentioned problems.

[0009] Technical solution: In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a soft rock tunnel drainage structure, including a tunnel body, a drainage ditch is symmetrically arranged at the bottom of the tunnel body, a plurality of drainage holes are opened on the side wall of the tunnel body, a drainage pipe is embedded and fixed in the drainage hole, a section of the drainage pipe between the side wall of the tunnel body is opened with a plurality of immersion holes, and a drainage mechanism is arranged between the drainage ditch and the adjacent side wall of the tunnel body to introduce the seepage water on the side wall of the tunnel body into the drainage ditch.

[0010] The drainage mechanism includes drainage buckets equidistantly arranged on the side walls of the tunnel body along the front-to-back direction, and a plurality of drainage buckets are connected end to end in sequence. A support assembly for supporting the drainage bucket and the side walls of the tunnel body is arranged at the lower side of the drainage bucket. The support assembly includes a right-angled ladder frame fixedly connected to the lower side of the drainage bucket by a plurality of fixed plates, and a positioning assembly for adjusting the outflow position of the flowing water in the drainage bucket is arranged on the inclined surface of the right-angled ladder frame.

[0011] The positioning assembly includes a slot frame 1 hinged at the top of the inclined surface of the right-angled ladder frame, a slot frame 2 is arranged at the bottom of the slot frame 1, a guide groove is opened on the side wall of the slot frame 1, a guide block is fixedly connected to the position corresponding to the guide groove on the inner side of the side wall of the slot frame 2, the guide block is slidably connected in the guide groove, a telescopic column is hinged at the bottom of the slot frame 2, the telescopic column is slidably embedded in the sleeve, the bottom end of the sleeve is hinged to the bottom of the inclined surface of the right-angled ladder frame, the outer thread of the sleeve is connected with a locking bolt, the front and rear sides of the lower end of the slot frame 2 are fixedly connected with connecting pins, the connecting pins are movably connected in the sliding groove of the sliding frame, the left and right ends of the front and rear sliding frames are respectively fixedly connected by mounting plates, and the mounting plates are fixedly connected to the bottom of the tunnel body by a number of mounting bolts.

[0012] As a preferred technical solution of the present invention, the lower end of the drainage pipe is cut into a horizontal opening and the end is against the side wall of the drainage bucket.

[0013] As a preferred technical solution of the present invention, a downwardly bent flow guide port is provided at the lower end of the second trough frame.

[0014] As a preferred technical solution of the present invention, the support assembly also includes a rib plate fixedly connected between the vertical wall and the bottom wall of the right-angle ladder frame, and the side walls of the right-angle ladder frame in contact with the bottom of the tunnel body are integrally fixedly connected with a plurality of fixing ears, and the fixing ears are fixedly connected to the bottom of the tunnel body by bolts.

[0015] As a preferred technical solution of the present invention, the drainage bucket is V-shaped as a whole, and the bottom wall of the drainage bucket is recessed downward into a trapezoid to form a trapezoidal cavity. The bottom wall of the trapezoidal cavity is provided with a drain outlet and fixedly connected with a water collecting pipe mouth, and the lower end of the water collecting pipe mouth points to trough frame one.

[0016] As a preferred technical solution of the present invention, the front side of the drainage bucket is fixedly connected with a docking seam, and the rear side of the drainage bucket 31 is provided with a docking protrusion, and two adjacent drainage buckets are connected end to end through the docking seam and the docking protrusion.

[0017] As a preferred technical solution of the present invention, a screening component for filtering the flowing water is arranged on the lower side of the interior of the second trough frame, and the screening component includes a mounting rod fixedly connected between the front and rear side walls of the second trough frame, a flap is rotatably connected to the middle part of the mounting rod, a sieve plate is fixedly connected to the lower side of the flap, a plurality of sieve holes are provided on the sieve plate, the lower end of the sieve plate is pressed against the bottom wall of the second trough frame, and torsion springs are symmetrically fixedly connected to the front and rear sides of the flap, the torsion spring is sleeved on the mounting rod and the end thereof away from the flap is fixedly connected to the side wall of the second trough frame.

[0018] As a preferred technical solution of the present invention, the side surfaces of the front and rear sliding frames that are away from each other are fixedly connected with a plurality of docking rods, and the outer ends of the docking rods are fixedly connected with docking flanges. The positions of the front and rear docking flanges correspond to the front and rear edge positions of the drainage bucket, and the drainage mechanisms arranged in the front and rear directions are fixedly connected in sequence by docking flanges, a plurality of bolts and nuts.

[0019] Beneficial effects:

[0020] 1. The connection structure of the drainage bucket, the right-angle ladder frame and the drainage pipe adopted in the present invention can support the drainage pipe tightly through the drainage bucket, ensuring that the drainage pipe will not fall off from the drainage hole as the soft rock tunnel structure sinks, causing the drainage pipe to be unable to collect seepage water from the side wall of the soft rock tunnel. The drainage bucket fits the side wall of the soft rock tunnel, which can further collect the seepage water. At the same time, the present invention supports the side wall of the soft rock tunnel through the right-angle ladder frame, improves the structural strength of the side wall of the soft rock tunnel, reduces the number of drainage holes, and improves the support effect on the side wall of the soft rock tunnel.

[0021] 2. The screening component used in the present invention can screen the gravels in the seepage water through the screen plate, so as to prevent the gravels accumulated over the years from clogging the drainage ditch and causing poor drainage.

[0022] 3. The docking rod and docking flange structure adopted in the present invention connects the rows of drainage mechanisms in series, so that the multiple drainage mechanism structures are locked in an integrated manner, and the external force exerted on the drainage mechanism is apportioned by the integrated structural locking, thereby ensuring the overall stability of the multiple connected drainage mechanisms. It can also reduce the influence of the local looseness on the stability of the overall drainage structure when the connection between the local drainage mechanism and the bottom of the soft rock tunnel becomes loose, thereby ensuring the drainage effect in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a distribution diagram of the tunnel body, drainage mechanism, drainage ditch and drainage pipe of the present invention.

[0025] Figure 2 It is a schematic cross-sectional structural diagram of the drainage mechanism of the present invention.

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of a single drainage mechanism of the present invention.

[0027] Figure 4 The present invention Figure 3 Schematic diagram of the enlarged structure of area A in the middle.

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the drainage bucket of the present invention.

[0029] Figure 6 It is a schematic diagram of the state of multiple drainage mechanisms docking in the present invention.

[0030] Figure 7 It is a top view of a plurality of drainage mechanisms of the present invention after docking.

[0031] In the figure: 1, tunnel body; 2, drainage ditch; 3, drainage mechanism; 31, drainage bucket; 311, trapezoidal cavity; 312, water collecting pipe mouth; 313, fixing plate; 314, docking protrusion; 315, docking seam; 32, adjustment component; 321, trough frame 1; 322, guide block; 323, guide groove; 324, trough frame 2; 3241, connecting pin; 3242, diversion port; 325, telescopic column; 3 251. Locking bolt; 326. Sleeve; 327. Screening component; 3271. Flap; 3272. Torsion spring; 3273. Screen plate; 3274. Mounting rod; 328. Sliding frame; 3281. Slide groove; 329. Mounting plate; 33. Docking rod; 331. Docking flange; 4. Support assembly; 41. Right-angle ladder frame; 42. Rib plate; 43. Fixing ear; 5. Drain pipe; 51. Immersion hole. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0033] See also Figure 1 and Figure 2 A soft rock tunnel drainage structure comprises a tunnel body 1, a drainage ditch 2 is symmetrically arranged at the bottom of the tunnel body 1, a plurality of drainage holes are opened on the side wall of the tunnel body 1, a drainage pipe 5 is embedded and fixed in the drainage hole, a section of the drainage pipe 5 between the side wall of the tunnel body 1 is provided with a plurality of soaking holes 51, and a drainage mechanism 3 is arranged between the drainage ditch 2 and the adjacent side wall of the tunnel body 1 to guide the seepage water on the side wall of the tunnel body 1 into the drainage ditch 2.

[0034] See also Figure 1 , Figure 2 and Figure 3 The drainage mechanism 3 includes drainage buckets 31 equidistantly arranged on the side wall of the tunnel body 1 along the front-to-back direction, and a plurality of drainage buckets 31 are connected end to end in sequence. A support assembly 4 for supporting the drainage bucket 31 and the side wall of the tunnel body 1 is provided at the lower side of the drainage bucket 31. The support assembly 4 includes a right-angled ladder frame 41 fixedly connected to the lower side of the drainage bucket 31 through a plurality of fixing plates 313, and a positioning assembly 32 for adjusting the outflow position of the flowing water in the drainage bucket 31 is provided on the inclined surface of the right-angled ladder frame 41.

[0035] See also Figure 1 , Figure 2 and Figure 3 The positioning assembly 32 includes a slot frame 1 321 hinged on the top of the inclined surface of the right-angled trapezoidal frame 41, a slot frame 2 324 is arranged at the bottom of the slot frame 1 321, a guide groove 323 is opened on the side wall of the slot frame 1 321, a guide block 322 is fixedly connected to the position of the guide groove 323 on the inner side of the side wall of the slot frame 2 324, the guide block 322 is slidably connected in the guide groove 323, and a telescopic column 325 is hinged at the bottom of the slot frame 2 324, and the telescopic column 325 is slidably embedded in the sleeve 32 6, the bottom end of the sleeve 326 is hinged at the bottom of the inclined surface of the right-angle ladder frame 41, and the outer thread of the sleeve 326 is connected with a locking bolt 3251, and the front and rear sides of the lower end of the slot frame 324 are fixedly connected with a connecting pin 3241, and the connecting pin 3241 is movably connected in the slide groove 3281 of the sliding frame 328, and the left and right ends of the front and rear sliding frames 328 are respectively fixedly connected by a mounting plate 329, and the mounting plate 329 is fixedly connected to the bottom of the tunnel body 1 by a plurality of mounting bolts.

[0036] During specific operation, the seepage water from the side wall of the lane body 1 will enter the drainage pipe 5 through the immersion hole 51, and the drainage pipe 5 will concentrate the seepage water into the drainage bucket 31. The drainage bucket 31 is provided to support the drainage pipe 5, which can further improve the installation stability of the drainage pipe 5. Then, the drainage bucket 31 concentrates the seepage water, and under the action of gravity, the seepage water will flow into the trough frame 1 321, and then be transported to the drainage ditch 2 through the trough frame 2 324. In actual situations, the drainage ditch 5 is curved, and the lower end of the trough frame 2 324 cannot be confirmed. To ensure that it is always directly above the drain ditch 2, when the lower end of the trough frame 324 is not enough to reach the drain ditch 2 or exceeds the range of the drain ditch 2, the telescopic column 325 is made active by loosening the locking bolt 3251, and the telescopic column 325, the connecting pin 3241 and the sliding frame 328 work together to adjust the lower end position of the trough frame 324 to ensure that the water discharged from the trough frame 324 can accurately fall into the drain ditch 2. After the adjustment is completed, the telescopic column 325 needs to be locked in position by the locking bolt 3251.

[0037] See also Figure 2 The lower end of the drainage pipe 5 is cut into a horizontal opening and its end is against the side wall of the drainage bucket 31. The drainage pipe 5 is provided with a horizontal opening to avoid the side wall of the drainage bucket 31 from causing flow obstruction to the water flow. The end of the drainage pipe 5 is set to be against the side wall of the drainage bucket 31, which can support the drainage pipe 5 and ensure the stable installation of the drainage pipe 5, and avoid the drainage pipe 5 from loosening and falling off due to structural settlement of the soft rock tunnel.

[0038] See also Figure 2 The lower end of the second trough frame 324 is provided with a downwardly bent diversion port 3242. The diversion port 3242 can redirect the water flow to ensure that the seepage water can be accurately introduced into the drainage ditch 2.

[0039] See also Figure 2 and Figure 3 The support assembly 4 also includes a rib plate 42 fixedly connected between the vertical wall and the bottom wall of the right-angled ladder frame 41. The side wall of the right-angled ladder frame 41 in contact with the bottom of the tunnel body 1 is integrally fixedly connected with a plurality of fixing ears 43, and the fixing ears 43 are fixedly connected to the bottom of the tunnel body 1 by bolts.

[0040] During specific operation, the structural strength of the right-angled ladder frame 41 is ensured by the rib plate 42 , and the right-angled ladder frame 41 is stably fixed to the bottom of the tunnel body 1 by the fixing ears 43 , and the right-angled ladder frame 41 is used to support the side wall of the tunnel body 1 .

[0041] See also Figure 2 , Figure 3 and Figure 5 The drainage bucket 31 is V-shaped as a whole, and the bottom wall of the drainage bucket 31 is recessed downward into a trapezoid to form a trapezoidal cavity 311. The bottom wall of the trapezoidal cavity 311 is provided with a water outlet and is fixedly connected to a water collecting pipe mouth 312, and the lower end of the water collecting pipe mouth 312 points to the trough frame 1 321.

[0042] During specific operation, the V-shaped drainage bucket 31 can be used to concentrate the seepage water in the drainage pipe 5 and collect the seepage water sliding down the side wall of the tunnel body 1. The structure covers a large area, which can ensure the comprehensive collection of the seepage water sliding down the side wall of the tunnel body 1. The trapezoidal cavity 311 is set to ensure the rapid concentration of the seepage water, and the seepage water is discharged into the trough frame 321 through the water collection pipe mouth 312.

[0043] See also Figure 5 The front side of the drainage bucket 31 is fixedly connected with a docking seam 315, and the rear side of the drainage bucket 31 is provided with a docking protrusion 314. Two adjacent drainage buckets 31 are connected end to end through the docking seam 315 and the docking protrusion 314 of the two.

[0044] During specific operation, the two drainage buckets 31 are tightly connected by cooperating with the docking seam 315 and the docking protrusion 314, thereby effectively reducing the leakage of the seepage water.

[0045] See also Figure 3 and Figure 4 A screening component 327 for filtering the flowing water is arranged on the lower side of the interior of the second trough frame 324, and the screening component 327 includes a mounting rod 3274 fixedly connected between the front and rear side walls of the second trough frame 324, a flap 3271 is rotatably connected to the middle part of the mounting rod 3274, a sieve plate 3273 is fixedly connected to the lower side of the flap 3271, a plurality of sieve holes are opened on the sieve plate 3273, the lower end of the sieve plate 3273 is tightly pressed against the bottom wall of the second trough frame 324, and torsion springs 3272 are symmetrically fixedly connected to the front and rear sides of the flap 3271, the torsion spring 3272 is sleeved on the mounting rod 3274 and the end thereof away from the flap 3271 is fixedly connected to the side wall of the second trough frame 324.

[0046] During specific work, since the side walls of the tunnel body 1 are often accompanied by the falling of gravel during the water seepage process, the long-term accumulated gravel will affect the drainage function of the drainage ditch 2. The gravel in the seepage water is screened by the sieve plate 3273, which can reduce the impact of the gravel on the drainage ditch 2. The sieve plate 3273 is flipped by regularly operating the flap 3271 to make the sieve plate 3273 detach from the trough frame 324, so that the gravel inside the trough frame 324 can be cleaned. The torsion spring 3272 is provided to automatically reset the sieve plate 3273 to the state of contact with the trough frame 324.

[0047] See also Figure 3 and Figure 6 The side surfaces of the front and rear sliding frames 328 that are away from each other are fixedly connected with a plurality of docking rods 33, and the outer ends of the docking rods 33 are fixedly connected with docking flanges 331. The positions of the front and rear docking flanges 331 correspond to the front and rear positions of the drainage bucket 31. The drainage mechanisms 3 arranged in the front and rear directions are fixedly connected in sequence by the docking flanges 331, a plurality of bolts and nuts.

[0048] During specific operation, the rear docking flange 331 of the previous drainage mechanism 3 is docked with the front docking flange 331 of the subsequent drainage mechanism 3, and then fixedly connected by a number of bolts and nuts. Multiple drainage mechanisms 3 are fixedly connected in sequence. When the supporting force is concentrated on a local drainage mechanism 3, the external force can be shared to ensure the overall stability of the multiple connected drainage mechanisms 3. When the connection between the local drainage mechanism 3 and the bottom of the tunnel body 1 is loose, the influence of the local looseness on the stability of the overall structure can be reduced. During specific use, the tunnel body 1 is curved, and it cannot be guaranteed that the drainage mechanisms 3 can be connected in a large number of straight lines. It is possible to select to connect multiple drainage mechanisms 3 in the straight section of the tunnel body 1. The specific number is determined according to the length of the straight section. For the curved section of the tunnel body 1, a single drainage mechanism 3 is selected for use.

[0049] See also Figure 1 and Figure 7 When in use: S1: Install the sliding frame 328 on both sides of the drainage ditch 2 through the mounting plate 329, and stably fix the right-angle ladder frame 41 at the bottom corner position of the tunnel body 1 through the fixing ear 43, and use the right-angle ladder frame 41 to support the side wall of the tunnel body 1.

[0050] S2: When the lower end of the second trough frame 324 is not enough to reach the drain ditch 2 or exceeds the range of the drain ditch 2, the telescopic column 325 is made active by loosening the locking bolt 3251, and the telescopic column 325, the connecting pin 3241 and the sliding frame 328 work together to adjust the lower end position of the second trough frame 324 so that the lower end of the second trough frame 324 can be aligned with the drain ditch 2. After the adjustment is completed, it is locked again by the locking bolt 3251.

[0051] S3: The rear docking flange 331 of the previous drainage mechanism 3 is docked with the front docking flange 331 of the next drainage mechanism 3, and then fixedly connected by a plurality of bolts and nuts. Multiple drainage mechanisms 3 are fixedly connected in sequence, and at the same time, the two drainage buckets 31 are tightly docked by cooperating with the docking seam 315 and the docking protrusion 314.

[0052] S4: When in use, the seepage water on the side wall of the tunnel body 1 will enter the drain pipe 5 through the immersion hole 51, and the drain pipe 5 will concentrate the seepage water into the drainage bucket 31. The drainage bucket 31 is provided to support the drain pipe 5, which can further improve the installation stability of the drain pipe 5. The seepage water is then concentrated by the drainage bucket 31, and under the action of gravity, the seepage water will flow into the trough frame 1 321, and then be transported to the drainage ditch 2 through the trough frame 2 324. The gravel in the seepage water is screened by the sieve plate 3273. When the gravel needs to be cleaned later, the sieve plate 3273 is flipped by the flap 3271 to separate the sieve plate 3273 from the trough frame 2 324, and the gravel inside the trough frame 2 324 is cleaned.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soft rock tunnel drainage structure, comprising a tunnel body (1), a drainage ditch (2) is symmetrically arranged at the bottom of the tunnel body (1), a plurality of drainage holes are opened on the side wall of the tunnel body (1), a drainage pipe (5) is embedded and fixed in the drainage hole, and a section of the drainage pipe (5) between the side wall of the tunnel body (1) is opened with a plurality of immersion holes (51), characterized in that: A drainage mechanism (3) is provided between the drainage ditch (2) and the side wall of the adjacent tunnel body (1) to guide the seepage water on the side wall of the tunnel body (1) into the drainage ditch (2); The drainage mechanism (3) comprises drainage buckets (31) equidistantly arranged on the side wall of the tunnel body (1) along the front-to-back direction, a plurality of drainage buckets (31) are connected end to end in sequence, a support assembly (4) for supporting the drainage bucket (31) and the side wall of the tunnel body (1) is arranged at the lower side of the drainage bucket (31), the support assembly (4) comprises a right-angle ladder frame (41) fixedly connected to the lower side of the drainage bucket (31) through a plurality of fixing plates (313), and a position adjustment assembly (32) for adjusting the outflow position of the flowing water in the drainage bucket (31) is arranged on the inclined surface of the right-angle ladder frame (41); The positioning assembly (32) comprises a slot frame 1 (321) hinged on the top of the inclined surface of the right-angled ladder frame (41); a slot frame 2 (324) is arranged at the bottom of the slot frame 1 (321); a guide groove (323) is opened on the side wall of the slot frame 1 (321); a guide block (322) is fixedly connected to the position of the inner side of the side wall of the slot frame 2 (324) corresponding to the guide groove (323); the guide block (322) is slidably connected in the guide groove (323); a telescopic column (325) is hinged on the bottom of the slot frame 2 (324); the telescopic column (325) is slidably embedded in the sleeve (32 6), the bottom end of the sleeve (326) is hinged to the bottom of the inclined surface of the right-angled ladder frame (41), the outer thread of the sleeve (326) is connected with a locking bolt (3251), the front and rear sides of the lower end of the second slot frame (324) are fixedly connected with a connecting pin (3241), the connecting pin (3241) is movably connected in the slide groove (3281) of the sliding frame (328), the left and right ends of the front and rear sliding frames (328) are respectively fixedly connected by a mounting plate (329), and the mounting plate (329) is fixedly connected to the bottom of the tunnel body (1) by a plurality of mounting bolts.

2. A soft rock tunnel drainage structure according to claim 1, characterized in that: The support assembly (4) further comprises a rib plate (42) fixedly connected between the vertical wall and the bottom wall of the right-angled ladder frame (41); a plurality of fixing ears (43) are integrally fixedly connected to the side wall of the right-angled ladder frame (41) in contact with the bottom of the tunnel body (1); and the fixing ears (43) are fixedly connected to the bottom of the tunnel body (1) by bolts.

3. A soft rock tunnel drainage structure according to claim 1, characterized in that: The drainage bucket (31) is V-shaped as a whole, and the bottom wall of the drainage bucket (31) is recessed downward into a trapezoidal shape to form a trapezoidal cavity (311). The bottom wall of the trapezoidal cavity (311) is provided with a water outlet and is fixedly connected to a water collecting pipe mouth (312), and the lower end of the water collecting pipe mouth (312) points to the trough frame one (321).

4. A soft rock tunnel drainage structure according to claim 1, characterized in that: The front side of the drainage bucket (31) is fixedly connected with a docking seam (315), and the rear side of the drainage bucket (31) is provided with a docking protrusion (314). Two adjacent drainage buckets (31) are connected end to end through the docking seams (315) and the docking protrusions (314) thereof.

5. The soft rock tunnel drainage structure according to claim 1, characterized in that: A screening component (327) for filtering water flowing through is arranged at the lower side of the interior of the second trough frame (324), the screening component (327) comprising a mounting rod (3274) fixedly connected between the front and rear side walls of the second trough frame (324), a flap (3271) being rotatably connected to the middle of the mounting rod (3274), a sieve plate (3273) being fixedly connected to the lower side of the flap (3271), a plurality of sieve holes being provided on the sieve plate (3273), the lower end of the sieve plate (3273) being tightly pressed against the bottom wall of the second trough frame (324), a torsion spring (3272) being symmetrically fixedly connected to the front and rear sides of the flap (3271), the torsion spring (3272) being sleeved on the mounting rod (3274) and the end thereof away from the flap (3271) being fixedly connected to the side wall of the second trough frame (324).

6. The soft rock tunnel drainage structure according to claim 1, characterized in that: A plurality of docking rods (33) are fixedly connected to the side surfaces of the front and rear sliding frames (328) that are away from each other, and a docking flange (331) is fixedly connected to the outer end of the docking rod (33). The positions of the front and rear docking flanges (331) correspond to the front and rear positions of the drainage bucket (31). The drainage mechanisms (3) arranged in the front and rear directions are fixedly connected in sequence through the docking flanges (331), a plurality of bolts and nuts.

7. The soft rock tunnel drainage structure according to claim 1, characterized in that: The lower end of the drainage pipe (5) is cut into a horizontal opening and its end is against the side wall of the drainage bucket (31).

8. The soft rock tunnel drainage structure according to claim 1, characterized in that: The lower end of the second trough frame (324) is provided with a downwardly bent flow guide port (3242).

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