An assembled underground integrated pipe gallery and construction method

Abstract

The present invention discloses a prefabricated underground utility tunnel and a construction method. The utility tunnel includes prefabricated pipes, corrugated pipes, elastic devices, a first sliding plate, and a second sliding plate. The two prefabricated pipes are connected by corrugated pipes. A first sliding plate is fixed on one of the prefabricated pipes, and a second sliding plate is fixed on the other prefabricated pipe. A chute is formed on the first sliding plate, and a slider is fixedly connected to the second sliding plate. The slider is embedded in the chute and is slidably connected to the chute. An elastic device is arranged on the corrugated pipe, and the elastic device is used to reset the corrugated pipe. By providing the corrugated pipe and the elastic device, the present invention can provide space for deformation or movement of the prefabricated pipe when the prefabricated pipe deforms or moves, avoiding damage to the pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground integrated pipe gallery construction, and specifically relates to a prefabricated underground integrated pipe gallery and a construction method thereof. Background Art

[0002] An underground integrated pipe gallery is a public tunnel built underground in a city for centralized laying of municipal pipelines such as electricity, communication, radio and television, and water supply. The underground pipe gallery can effectively prevent the phenomenon of "zipper roads", enabling technicians to repair, maintain, expand and transform various pipelines in the pipe gallery without repeatedly excavating the road surface. At the same time, it greatly reduces the pipeline repair time and is widely used in urban construction.

[0003] In the prior art, the prefabricated underground pipe gallery is a tubular structure. Usually, the pipes are first prefabricated in segments, then excavated at the construction site, and then multiple segments of pipes are hoisted and spliced to form an underground pipe gallery. Finally, backfilling is carried out to put the underground pipe gallery into use.

[0004] The above-mentioned related technology has the following defects: The multiple segments of pipes are often fixedly connected by bolts. Under the action of soil extrusion and its own thermal expansion and contraction, the pipes will be extruded against each other, which may cause damage to the pipes. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a prefabricated underground integrated pipe gallery and a construction method thereof to prevent the pipes from being damaged due to soil extrusion or the influence of thermal expansion and contraction of the prefabricated pipes.

[0006] To solve the above technical problem, the technical solution adopted by the present invention is:

[0007] A prefabricated underground integrated pipe gallery includes prefabricated pipes, corrugated pipes, elastic devices, a first sliding plate and a second sliding plate.

[0008] Two prefabricated pipes are connected by a corrugated pipe; a first sliding plate is fixed on one of the prefabricated pipes, and a second sliding plate is fixed on the other prefabricated pipe; a chute is provided on the first sliding plate, and a slider is fixedly connected to the second sliding plate; the slider is embedded in the chute and is slidably connected to the chute.

[0009] An elastic device is provided on the corrugated pipe, and the elastic device is used to reset the corrugated pipe.

[0010] Further preferably, the elastic device includes a first spring and two adjusting plates; the two adjusting plates are respectively fixed at both ends of the corrugated pipe, and the two adjusting plates are connected by a first spring, and the elastic force of the first spring is used to reset the corrugated pipe in a contracted or stretched state.

[0011] Further preferably, a first reset plate is fixed on the first sliding plate, and the first reset plate is connected to the second sliding plate through a second spring.

[0012] A second reset plate is fixed on the second sliding plate, and the second reset plate is connected to the first sliding plate through a third spring.

[0013] Further preferably, a receiving box is arranged on the side wall of the prefabricated pipe intersecting with the plane where the first sliding plate and the second sliding plate are located, and the receiving box is connected to the prefabricated pipe through a pushing component.

[0014] A water permeable hole is formed in the bottom of the receiving box, and an expansion strip is vertically fixed on the water permeable hole.

[0015] A rotating shaft is fixed on the side wall of the receiving box, and the rotating shaft is used to connect the first driving component; the first driving component is used to drive the pushing component to expand or contract the distance between the two prefabricated pipes.

[0016] Further preferably, the pushing component includes a pushing bar, a ratchet, a ratchet tooth and a torsion spring; a fixing block is arranged on the side wall of one prefabricated pipe, and the pushing bar is connected in parallel with the side wall of the prefabricated pipe through the fixing block; two fixing plates are arranged on the side wall of the other prefabricated pipe, and a rotatable rotating rod is arranged between the fixing plates; the end of the ratchet tooth is connected to the rotating rod, and a torsion spring is arranged on the ratchet tooth, with one end of the torsion spring fixed on the ratchet tooth and the other end connected to the prefabricated pipe.

[0017] One end of the pushing bar is fixed with a ratchet, and the ratchet cooperates with the ratchet tooth; the other end of the pushing bar is a slope.

[0018] Further preferably, the first driving component includes a flap and a pushing block; the flap is sleeved on the rotating shaft, the flap can rotate along the rotating shaft, one end of the flap is placed on the top of the expansion strip and fits with the expansion strip, and the other end of the flap is placed on the top of the pushing block and fits with the top of the pushing block; the pushing block is arranged perpendicular to the pushing bar, the bottom end of the pushing block is a slope, and the pushing block passes through the bottom of the receiving box and cooperates with the end slope of the pushing bar.

[0019] Further preferably, a first guide rod, a first rack, a second rack and a first gear are further arranged in the receiving box; the first rack is vertically fixed on the top wall in the receiving box through the first guide rod, the first rack is sleeved on the first guide rod, and the bottom end of the first rack fits with the expansion strip; the second rack is arranged in the receiving box, and the bottom end of the second rack passes through the bottom of the receiving box and abuts against the ratchet tooth.

[0020] The first gear is fixed on the receiving box, the first rack and the second rack are arranged in parallel on both sides of the first gear, and the first rack and the second rack are respectively meshed with the first gear.

[0021] Further preferably, a screw rod is also arranged in the storage box. The screw rod includes a limit groove, a limit block, and a conical head; a limit groove is axially formed on the screw rod, a limit block is fixedly connected to the top of the accommodation box, and the limit block is slidably connected to the limit groove; the screw rod penetrates through the top wall of the accommodation box, and a conical head is fixedly connected to the top of the screw rod.

[0022] Further preferably, a second driving assembly is also arranged in the storage box. The second driving assembly includes a first bevel gear, a second bevel gear, and a bearing plate; the bearing plate is fixed on the side wall of the accommodation box, the second bevel gear is rotatably installed on the bearing plate, the screw rod is sleeved on the second bevel gear and is threadedly connected to the second bevel gear; the first bevel gear is fixedly connected to the rotating shaft, and the first bevel gear meshes with the second bevel gear.

[0023] A construction method for an assembled underground utility tunnel specifically includes the following steps:

[0024] Step 1: Excavate the soil at the construction site to excavate a construction pit that meets the placement requirements of the precast pipes.

[0025] Step 2: Install the precast pipes in the excavated construction pit, install a corrugated pipe at one end of the precast pipe, and install another precast pipe at the other end of the corrugated pipe; and set an elastic device on the corrugated pipe.

[0026] Step 3: Make the slider slidably connected to the inner wall of the chute, then fixedly install the first sliding plate on the precast pipe, and fixedly install the second sliding plate on another adjacent precast pipe.

[0027] Step 4: Install the pushing assembly on the precast pipe.

[0028] Step 5: Install the first driving assembly and the second driving assembly in the storage box, and place the storage box above the precast pipe.

[0029] Step 6: Backfill the construction pit so that both the precast pipes and the storage box are buried in the soil at the construction site.

[0030] The present invention has the following beneficial effects:

[0031] 1. When the soil is extruded or the precast pipes themselves are affected by thermal expansion and contraction, the precast pipes can extrude or stretch the corrugated pipes, and the first spring is compressed. At this time, the adjusting plate and the first spring can play a shock-absorbing role to prevent the pipes from being damaged; when the deformation of the precast pipes and the adjacent precast pipes is restored, under the elastic force of the first spring, it is convenient for the corrugated pipes to return to their original positions.

[0032] 2. When there is groundwater or infiltrated rainwater at the accommodation box, the water flow can enter the accommodation box through the water-permeable holes and come into contact with the expansion strip. The expansion strip can expand when it meets water. At this time, under the action of the pushing component, the distance between the precast pipe and another adjacent precast pipe can be reduced, preventing the water flow from penetrating through the corrugated pipe into the pipeline.

[0033] 3. When there is groundwater or infiltrated rainwater at the accommodation box, the water flow can enter the accommodation box through the water-permeable holes and come into contact with the expansion strip. The expansion strip can expand when it meets water. The screw penetrates the ground at the construction site, and a part is located above the ground surface, so as to play a role in warning and indicating the position of the water flow influence at the precast pipe.

[0034] 4. When the ground where the accommodation box is located dries up, the expansion strip dehydrates and shortens, the second rack loses the downward pressure and lifts up. Under the action of the torsion spring, the ratchet resets and lifts up, and the connection between the pawl and the ratchet is disconnected, so that the distance between the precast pipe and another adjacent precast pipe returns to the original position. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of an assembled underground utility tunnel of the present invention.

[0036] Figure 2 It is a cross-sectional view of the first sliding plate of an assembled underground utility tunnel of the present invention.

[0037] Figure 3 It is a cross-sectional view of the accommodation box of an assembled underground utility tunnel of the present invention.

[0038] Figure 4 It is a schematic diagram of the second bevel gear of an assembled underground utility tunnel of the present invention.

[0039] Among them:

[0040] 1. Precast pipe; 11. Fixed block; 12. Fixed plate; 13. Rotating rod;

[0041] 2. Corrugated pipe;

[0042] 3. Elastic device; 31. First spring; 32. Adjusting plate;

[0043] 4. First sliding plate; 41. Chute; 42. First reset plate; 43. Second spring;

[0044] 5. Second sliding plate; 51. Slide block; 52. Second reset plate; 53. Third spring;

[0045] 6. Accommodating box; 61. Water-permeable hole; 62. Expansion strip; 63. Rotating shaft; 64. Guide rod; 65. First rack; 66. Second rack; 67. First gear; 68. Screw rod; 681. Limit groove; 682. Limit block; 683. Conical head

[0046] 7. Pushing component; 71. Pushing strip; 72. Pawl; 73. Ratchet teeth; 74. Torsion spring

[0047] 8. First driving component; 81. Flap; 82. Pushing block

[0048] 9. Second driving component; 91. First bevel gear; 92. Second bevel gear; 93. Bearing plate Specific embodiments

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present invention. The specific dimensions adopted in this embodiment are only for exemplifying the technical solution and do not limit the protection scope of the present invention

[0050] The present invention will be further described in detail below in conjunction with the drawings and specific preferred embodiments

[0051] As Figure 1 shown, the corrugated pipe 2 is located between two adjacent precast pipes 1. One side of the corrugated pipe 2 is fixedly connected to one of the precast pipes 1, and the other side of the corrugated pipe 2 is fixedly connected to the other precast pipe 1. Four groups of elastic devices 3 for facilitating the reset of the corrugated pipe 2 are provided on the corrugated pipe 2

[0052] The underground integrated pipe gallery generally includes a number of precast pipes connected to each other through corrugated pipes. Multiple groups of precast pipes can be set according to actual site needs, and the precast pipes and corrugated pipes are constructed and installed

[0053] When the precast pipe 1 deforms or moves, the precast pipe 1 can squeeze or stretch the corrugated pipe 2, and the corrugated pipe 2 can provide space for the deformation or movement of the precast pipe 1, thereby reducing the possibility of the pipeline being damaged; by using the elastic device 3, the shock absorption effect can be achieved on the deformation of the corrugated pipe 2, reducing the possibility of the corrugated pipe 2 being damaged, and at the same time facilitating the reset of the corrugated pipe 2

[0054] As Figure 2As shown in the figure, each set of elastic devices 3 includes a first spring 31 and two adjusting plates 32. The two adjusting plates 32 are arranged in parallel, and both adjusting plates 32 are fixedly connected to the end of the bellows 2. The number of first springs 31 in each set of elastic devices 3 is 3. One end of each first spring 31 is fixedly connected to one of the adjusting plates 32, and the other end of the first spring 31 is fixedly connected to the other adjusting plate 32. Three sets of first springs 31 are arranged on each surface of each end cross-section of the bellows 2, and a total of nine sets of first springs 31 are arranged at each end.

[0055] When the bellows 2 is compressed or stretched, the bellows 2 can drive the two adjusting plates 32 to move, so that the first spring 31 is compressed or stretched. Under the elastic force of the first spring 31, it can play a shock-absorbing role in the movement of the bellows 2, reduce the possibility of damage to the bellows 2, and at the same time facilitate the reset of the bellows 2.

[0056] As Figure 1 and Figure 2 shown in the figure, first sliding plates 4 are fixedly connected to two opposite sides of the precast pipe 1 respectively. Corresponding to the two first sliding plates 4, two second sliding plates 5 are fixedly connected to another precast pipe 1. A dovetail chute 41 is formed on the first sliding plate 4, and a dovetail slider 51 is fixedly connected to the second sliding plate 5. The slider 51 is slidably connected to the inner wall of the chute 41; a first reset plate 42 is fixedly connected to the first sliding plate 4, a second spring 43 is fixedly connected to the first reset plate 42, and the second spring 43 is fixedly connected to the second sliding plate 5; a second reset plate 52 is fixedly connected to the second sliding plate 5, a third spring 53 is fixedly connected to the second reset plate 52, and the third spring 53 is fixedly connected to the first sliding plate 4.

[0057] In the normal state, the first sliding plate 4 and the second sliding plate 5 can support the precast pipe 1 and another adjacent precast pipe 1; when relative movement occurs between two adjacent precast pipes 1, one of the precast pipes 1 moves to drive the first sliding plate 4 to move, and the other precast pipe 1 moves to drive the second sliding plate 5 to move. The movement of the second sliding plate 5 drives the slider 51 to move, so that space can be provided for the movement of the precast pipe 1, and at the same time, it plays a guiding role in the movement of the precast pipe 1; by using the second spring 43 and the third spring 53, it is convenient for the first sliding plate 4 and the second sliding plate 5 to reset.

[0058] As Figure 1 and Figure 3 shown in the figure, a receiving box 6 is arranged at the top of two adjacent precast pipes 1. A water permeable hole 61 is formed at the bottom of the receiving box 6, and an expansion strip 62 is arranged in the receiving box 6. The bottom of the expansion strip 62 can block the water permeable hole 61.

[0059] As Figure 1 and Figure 3As shown, a pushing assembly 7 is provided on the prefabricated pipe 1. The pushing assembly 7 includes a pushing bar 71, a pawl 72, and a ratchet 73. A fixing block 11 is fixedly connected to the top of one prefabricated pipe 1 near the corrugated pipe 2. The pushing bar 71 is fixedly connected to the fixing block 11. The pawl 72 is fixedly connected to the top of the pushing bar 71. Two fixing plates 12 are provided on the top of the other prefabricated pipe 1. A rotating rod 13 is rotatably connected to the two fixing plates 12. The ratchet 73 is fixedly connected to the rotating rod 13. Two torsion springs 74 are fixedly connected to the ratchet 73. The two torsion springs 74 are arranged in one-to-one correspondence with the two fixing plates 12, and the torsion springs 74 are fixedly connected to the fixing plates 12. The pawl 72 can cooperate with the ratchet 73.

[0060] As Figure 3 shown, a first driving assembly 8 is provided in the receiving box 6. The first driving assembly 8 includes a flap 81 and a pushing block 82. A rotating shaft 63 is rotatably installed on the inner wall of the receiving box 6. The flap 81 is fixedly connected to the rotating shaft 63. One end of the flap 81 can be attached to the top of the expansion strip 62. The pushing block 82 penetrates the bottom wall of the receiving box 6, and the pushing block 82 is slidably connected to the receiving box 6. The other end of the flap 81 can be attached to the pushing block 82. An inclined surface is provided at the bottom end of the pushing block 82, and an inclined surface is provided on the pushing bar 71. The inclined surface of the pushing block 82 can be attached to the inclined surface of the pushing bar 71.

[0061] As Figure 3 shown, a guide rod 64 is fixedly connected to the top wall of the receiving box 6. A first rack 65 is slidably connected to the guide rod 64. The bottom of the first rack 65 can be attached to the top of the expansion strip 62. A second rack 66 is slidably connected in the receiving box 6. The second rack 66 penetrates the bottom wall of the receiving box 6, and the bottom of the second rack 66 can be attached to the ratchet 73. A first gear 67 is rotatably installed in the receiving box 6. Both the first rack 65 and the second rack 66 are meshed with the first gear 67.

[0062] In the normal state, the flap 81 is in a horizontal state. At this time, under the action of the torsion spring 74, the pawl 72 and the ratchet teeth 73 do not cooperate. When there is groundwater or rainwater infiltration between the accommodation box 6 and the prefabricated pipe 1, the water flow can contact the expansion strip 62 through the water permeable holes 61. The expansion strip 62 is made of a water-absorbing and expanding material, such as water-absorbing and expanding rubber, etc. The expansion strip 62 can expand when encountering water. On the one hand, it can push the flap 81 to rotate. The rotation of the flap 81 drives the push block 82 to move downward. Under the action of the inclined surfaces of the push block 82 and the push bar 71, the movement of the push block 82 drives the push bar 71 to move, and the movement of the push bar 71 drives the pawl 72 to move. On the other hand, it can push the first rack 65 to move. The movement of the first rack 65 drives the first gear 67 to rotate. The rotation of the first gear 67 drives the second rack 66 to move. The movement of the second rack 66 pushes the ratchet teeth 73 to rotate, so that the ratchet teeth 73 rotate in the horizontal direction, and further the pawl 72 and the ratchet teeth 73 cooperate, reducing the distance between the two prefabricated pipes 1 and preventing the water flow from entering the interior of the prefabricated pipe 1 through the corrugated pipe 2. When the water flow between the accommodation box 6 and the prefabricated pipe 1 is cleared, the expansion strip 62 returns to its original state. Under the action of the torsion spring 74, the ratchet teeth 73 no longer cooperate with the pawl 72, so that under the action of the elastic device 3, the reset of the prefabricated pipe 1 can be facilitated.

[0063] As Figure 3 and Figure 4 shown, a screw rod 68 is arranged in the accommodation box 6. A limit groove 681 is opened on the screw rod 68. A limit block 682 is fixedly connected to the top of the accommodation box 6. The limit block 682 is slidably connected to the inner wall of the limit groove 681. The screw rod 68 penetrates through the top wall of the accommodation groove. A conical head 683 is fixedly connected to the top of the screw rod 68.

[0064] As Figure 3 and Figure 4 shown, a second driving assembly 9 is arranged in the accommodation box 6. The second driving assembly 9 includes a first bevel gear 91 and a second bevel gear 92. The first bevel gear 91 is fixedly connected to the rotating shaft 63. A bearing plate 93 is fixedly connected to the side wall of the accommodation box 6. The second bevel gear 92 is rotatably installed on the bearing plate 93. The screw rod 68 is threadedly connected to the second bevel gear 92. The first bevel gear 91 meshes with the second bevel gear 92.

[0065] In the normal state, the screw rod 68 is buried in the soil. When the expansion strip 62 expands, the expansion strip 62 pushes the flap 81 to rotate. The rotation of the flap 81 drives the rotating shaft 63 to rotate. The rotation of the rotating shaft 63 drives the first bevel gear 91 to rotate. The rotation of the first bevel gear 91 drives the second bevel gear 92 to rotate. The rotation of the second bevel gear 92 drives the screw rod 68 to move, so that the screw rod 68 penetrates through the ground at the construction site and a part is located above the ground surface, thus being able to play a warning role for the water flow influence at the prefabricated pipe 1. By using the function of the conical head 683, it is convenient for the screw rod 68 to penetrate through the ground at the construction site.

[0066] The implementation principle of the present invention is as follows: when adjacent two prefabricated pipes 1 are deformed or displaced, by the action of the corrugated pipe 2, space can be provided for the deformation or displacement of the prefabricated pipe 1, reducing the possibility of the pipeline being damaged; by the action of the elastic device 3, the possibility of the corrugated pipe 2 being damaged can be reduced, and the reset of the corrugated pipe 2 can be facilitated; by using the first sliding plate 4 and the second sliding plate 5, in the normal state, they can support the prefabricated pipe 1 and the corrugated pipe 2, and when the prefabricated pipe 1 is deformed or displaced, they can play a guiding role; by arranging the accommodation box 6 and the expansion strip 62, when there is water flow influence at the prefabricated pipe 1, the distance between adjacent two prefabricated pipes 1 can be reduced, reducing the possibility of water flow entering the interior of the prefabricated pipe 1 through the corrugated pipe 2; at the same time, by using the screw 68, warning and positioning functions can be achieved.

[0067] The present invention also discloses a construction method for an assembled underground utility tunnel, including the following steps:

[0068] Step 1: Excavate the soil at the construction site to excavate a construction pit that meets the placement requirements of the prefabricated pipe 1;

[0069] Step 2: Install the prefabricated pipe 1 in the excavated construction pit, install the corrugated pipe 2 at one end of the prefabricated pipe 1, and install another prefabricated pipe 1 at the other end of the corrugated pipe 2; and connect the elastic device 3;

[0070] Step 3: Make the slider 51 slideably connected to the inner wall of the chute 41, then fixedly install the first sliding plate 4 on the prefabricated pipe 1, and fixedly install the second sliding plate 5 on another adjacent prefabricated pipe 1;

[0071] Step 4: Install the pushing component 7 on the prefabricated pipe 1;

[0072] Step 5: Install the first driving component 8 and the second driving component 9 in the accommodation box 6, and place the accommodation box 6 above the prefabricated pipe 1;

[0073] Step 6: Backfill the construction pit so that the prefabricated pipe 1 and the accommodation box 6 are both buried in the soil at the construction site.

[0074] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. An assembled underground integrated pipe gallery, characterized in that: It includes a precast pipe (1), a corrugated pipe (2), an elastic device (3), a first sliding plate (4) and a second sliding plate (5); The two precast pipes (1) are connected by a corrugated pipe (2); A first sliding plate (4) is fixed on one of the precast pipes (1), and a second sliding plate (5) is fixed on the other precast pipe (1); a chute (41) is provided on the first sliding plate (4), and a slider (51) is fixedly connected to the second sliding plate (5); the slider (51) is embedded in the chute (41) and is slidably connected to the chute (41); An elastic device (3) is provided on the corrugated pipe (2), and the elastic device (3) is used to reset the corrugated pipe (2); On the side wall of the precast pipe (1) intersecting with the plane where the first sliding plate (4) and the second sliding plate (5) are located, a receiving box (6) is arranged, and the receiving box (6) is connected to the precast pipe (1) through a pushing component (7); A water permeable hole (61) is provided on the bottom of the receiving box (6), and an expansion strip (62) is vertically fixed on the water permeable hole (61); A rotating shaft (63) is rotatably installed on the inner wall of the receiving box (6), and the rotating shaft (63) is used to connect a first driving component (8); the first driving component (8) is used to drive the pushing component (7) to expand or contract the distance between the two precast pipes (1); The pushing component (7) includes a pushing bar (71), a ratchet pawl (72), a ratchet tooth (73), and a torsion spring (74); A fixing block (11) is arranged on the side wall of one precast pipe (1), and the pushing bar (71) is connected in parallel with the side wall of the precast pipe (1) through the fixing block (11); two fixing plates (12) are arranged on the side wall of the other precast pipe (1), and a rotating rod (13) is rotatably connected between the fixing plates (12); the end of the ratchet tooth (73) is connected to the rotating rod (13), and a torsion spring (74) is arranged on the ratchet tooth (73), one end of the torsion spring (74) is fixed on the ratchet tooth (73), and the other end is connected to the precast pipe (1); One end of the pushing bar (71) is fixed with a ratchet pawl (72), and the ratchet pawl (72) cooperates with the ratchet tooth (73); the other end of the pushing bar (71) is set as an inclined surface; The first driving component (8) includes a flap (81) and a pushing block (82); The flap (81) is fixedly connected to the rotating shaft (63), one end of the flap (81) is placed on the top of the expansion strip (62) and fits with the expansion strip (62), and the other end of the flap (81) is placed on the top of the pushing block (82) and fits with the top of the pushing block (82); The pushing block (82) is arranged perpendicular to the pushing bar (71), the bottom end of the pushing block (82) is an inclined surface, and the pushing block (82) passes through the bottom of the receiving box (6) and cooperates with the inclined surface at the end of the pushing bar (71); A first guide rod (64), a first rack (65), a second rack (66), and a first gear (67) are further arranged in the receiving box (6); The first rack (65) is vertically fixed on the top wall inside the receiving box through the first guide rod (64), the first rack (65) is sleeved on the first guide rod (64), and the bottom end of the first rack (65) fits with the expansion strip (62); The second rack (66) is arranged in the accommodation box (6), and the bottom end of the second rack (66) passes through the bottom of the accommodation box (6) and abuts against the ratchet teeth (73); The first gear (67) is fixed on the accommodation box (6). The first rack (65) and the second rack (66) are arranged in parallel on both sides of the first gear (67), and the first rack (65) and the second rack (66) are respectively meshed with the first gear (67).

2. The prefabricated underground integrated pipe gallery according to claim 1, wherein: The elastic device (3) includes a first spring (31) and two adjusting plates (32); the two adjusting plates (32) are respectively fixed at both ends of the corrugated pipe (2), and the two adjusting plates (32) are connected by the first spring (31). The first spring (31) is used to reset the corrugated pipe (2) in a contracted or stretched state.

3. The prefabricated underground utility tunnel according to claim 1, characterized in that: A first reset plate (42) is fixed on the first sliding plate (4), and the first reset plate (42) is connected to the second sliding plate (5) by a second spring (43); A second reset plate (52) is fixed on the second sliding plate (5), and the second reset plate (52) is connected to the first sliding plate (4) by a third spring (53).

4. The prefabricated underground utility tunnel according to claim 1, wherein: A screw rod (68) is further arranged in the accommodation box (6); the screw rod (68) includes a limiting groove (681), a limiting block (682), and a conical head (683); A limiting groove (681) is axially formed on the screw rod (68). A limiting block (682) is fixedly connected to the top of the accommodation box (6), and the limiting block (682) is slidably connected to the limiting groove (681); the screw rod (68) penetrates through the top wall of the accommodation box (6), and a conical head (683) is fixedly connected to the top of the screw rod (68).

5. The prefabricated underground utility tunnel according to claim 4, wherein: A second driving component (9) is further arranged in the accommodation box (6); the second driving component (9) includes a first bevel gear (91), a second bevel gear (92), and a bearing plate (93); The bearing plate (93) is fixed on the side wall of the accommodation box (6). The second bevel gear (92) is rotatably installed on the bearing plate (93). The screw rod (68) is sleeved on the second bevel gear (92) and is threadedly connected to the second bevel gear (92); the first bevel gear (91) is fixedly connected to the rotating shaft (63), and the first bevel gear (91) is meshed with the second bevel gear (92).

6. A construction method of an assembled underground integrated pipe gallery according to claim 5, characterized in that: Specifically, it includes the following steps: Step 1: Excavate the soil at the construction site to dig out a construction pit that meets the placement requirements of the precast pipe (1); Step 2: Install the precast pipe (1) in the excavated construction pit, install the corrugated pipe (2) at one end of the precast pipe (1), and install another precast pipe (1) at the other end of the corrugated pipe (2); and arrange the elastic device (3) on the corrugated pipe (2); Step 3: Make the slider (51) slidably connected to the inner wall of the chute (41), then fixedly install the first sliding plate (4) on the precast pipe (1), and fixedly install the second sliding plate (5) on another adjacent precast pipe (1); Step 4: Install the pushing component (7) on the precast pipe (1); Step Five: Install the first driving component (8) and the second driving component (9) in the accommodation box (6), and place the accommodation box (6) above the prefabricated pipe (1); Step Six: Backfill the construction pit so that both the prefabricated pipe (1) and the accommodation box (6) are buried in the soil at the construction site.

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