A detachable tunnel rectangular pipe section

Abstract

The present invention belongs to the technical field of tunnel excavation, and specifically is a detachable tunnel rectangular pipe segment, comprising a pipe segment body, one end face of the pipe segment body is provided with a steel collar, and the other end of the pipe segment body is provided with a steel ring; the steel collar comprises a collar portion and an annular plate; the end face of the annular plate is evenly provided with a plurality of through holes, and fastening bolts are passed through the through holes; in the present invention, the steel collar and the steel ring are arranged to be detachable from the pipe segment; the steel collar and the steel ring are respectively fixed to the two ends of the pipe segment body by fastening bolts; after the steel collar or the steel ring collides with external objects and is damaged, the steel collar or the steel ring can be removed from the pipe segment body for repair or replacement with a new steel collar and steel ring, which is convenient and quick, avoids waste, and reduces losses.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel excavation, in particular to a detachable tunnel rectangular pipe segment. Background Art

[0002] During the tunnel excavation process, in order to prevent soil collapse and construction accidents, pipe sections with rectangular end faces are laid while excavation is proceeding. The pipe sections are gradually laid in the already excavated culvert.

[0003] After the pipe segment is prefabricated, it is hoisted onto a vehicle by a hoist, transported to the construction site, and then unloaded by the hoist and laid flat on the construction site. When it is put into use, the pipe segment is hoisted vertically to the ground by the hoist and then hoisted into the culvert. From production to use, the pipe segment is hoisted many times in the middle process. The pipe segment is relatively heavy. During the hoisting process, the pipe segment swings and is difficult to control. The steel sleeve on the pipe segment is relatively weak. When external objects collide with the edge of the steel sleeve, it is easy to cause the steel sleeve to break, resulting in the steel sleeve being difficult to seal and fit on the steel ring on another pipe segment when it is put into use later. When the pipe segment is manufactured, the steel sleeve and the pipe segment are processed and formed as one piece. If the steel sleeve is seriously damaged and cannot be used, the pipe segment cannot be put into use, which causes waste, increases investment costs, and prolongs the construction period.

[0004] To this end, the present invention provides a detachable tunnel rectangular pipe section. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the detachable tunnel rectangular pipe section described in the present invention includes a pipe section body, one end face of the pipe section body is provided with a steel collar, and the other end of the pipe section body is provided with a steel ring; the steel collar includes a collar portion and an annular plate; the end face of the annular plate is evenly provided with a plurality of through holes, and fastening bolts are passed through the through holes, and the annular plate is fixed to one end face of the pipe section by the fastening bolts, the outer ring of the annular plate is the collar portion, the collar portion is wide-mouthed, and a steel ring is embedded in the collar portion; the steel ring includes an embedded portion and an annular seat; the end face of the annular seat is evenly provided with a plurality of through holes, and the through holes are penetrated by fastening bolts. The annular seat is fixed to the other end face of the pipe segment by fastening bolts, and the outer ring of the annular seat is the embedded part; in the process of tunnel excavation, in order to prevent earthwork from collapsing and causing construction accidents, during the excavation process, pipe segments with rectangular end faces are laid while excavating, and the pipe segments are gradually laid in the excavated culvert; after the pipe segments are prefabricated, they are hoisted onto the vehicle by a hoisting device and transported to the construction site, and then unloaded by the hoisting device and laid flat on the construction site. When put into use, the pipe segments are hoisted to be perpendicular to the ground by the hoisting device, and then hoisted into the culvert; the pipe segments are produced and put into use. In the process of use, the pipe section is lifted many times, and the pipe section is relatively heavy. During the lifting process, the pipe section swings and is difficult to control. The steel collar on the pipe section is relatively weak. When external objects collide with the edge of the steel collar, it is easy to cause the steel collar to break, resulting in the steel collar being difficult to seal and fit on the steel ring on another pipe section when it is put into use later. When the pipe section is manufactured, the steel collar and the pipe section are processed into an integral part. If the steel collar is seriously damaged and cannot be used, the pipe section cannot be put into use, causing waste, increasing investment costs, and extending the construction period. In the present invention, the steel collar and the steel ring and the pipe section are arranged to be detachable The invention discloses a method for fixing a plurality of steel sleeves and a plurality of steel rings on the plurality of pipe segments. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers. The plurality of steel sleeves and the plurality of steel rings are connected to each other by a plurality of screw thread rollers.

[0007] Preferably, the axial reinforcement inside the pipe segment body is fixed with a ring-shaped connecting plate, and a plurality of threaded holes are provided on the connecting plate, and the threaded holes correspond to the positions of the through holes, and the fastening bolts pass through the through holes and are threadedly connected in the threaded holes; when the pipe segment body is prefabricated, a steel connecting plate is provided in the pipe segment body, and the fastening bolts pass through the through holes and are threadedly connected in the threaded holes on the connecting plate. At this time, the end of the fastening bolt is not connected to the concrete on the pipe segment body, but the anti-disassembly force between the steel sleeve and the pipe segment body is concentrated on the connecting plate and the steel sleeve, thereby ensuring the firmness between the steel sleeve and the pipe segment body, and the steel ring is also connected to the connecting plate as described above, thereby ensuring the firmness between the steel ring and the pipe segment body.

[0008] Preferably, a ring-shaped groove is provided on the inclined surface of the inner surface of the collar portion; a ring-shaped clamping groove is provided on the inclined surface of the outer surface of the front end of the embedded portion, and a ring-shaped sealing ring is provided in the clamping groove, the cross section of the sealing ring is T-shaped, and the protruding clamping groove portion of the sealing ring is embedded in the groove; when the pipe segment is put into use, it is also necessary to spray anti-corrosion paint on the surface of the steel collar and the steel ring to reduce the erosion of soil moisture on the steel material and fill the potholes and unevenness on the surface. The steel collar and the steel ring are both made of steel materials, and there will be residual gaps when they are connected. These residual gaps will cause moisture to penetrate into the interior of the pipe segment body. A single spray of anti-corrosion paint still fails to ensure the sealing between pipe sections. For this purpose, a sealing ring and a groove are provided. When the steel rings are plugged in, the sealing ring is gradually embedded in the groove, thereby improving the sealing between the steel rings and the steel rings, thereby improving the sealing between the two adjacent pipe sections. When the steel ring is embedded in the steel ring, the steel ring squeezes the steel ring and rubs the sealing ring. At this time, the sealing ring may be offset and misplaced, resulting in poor sealing. The sealing ring of the present invention is embedded in the groove to restrict the sealing ring and prevent the sealing ring from being dislocated, thereby ensuring that the sealing ring is accurately embedded in the groove.

[0009] Preferably, a plurality of No. 1 glue injection holes are provided on the outer surface of the collar portion, and the No. 1 glue injection holes extend through the groove; a plurality of No. 2 glue injection holes are provided on the outer surface of the embedded portion, and the No. 2 glue injection holes extend through the bottom of the slot; after the two pipe sections are spliced, sealing glue is injected into the No. 1 glue injection hole and the No. 2 glue injection hole, and the sealing glue overflows into the groove and the slot, bonding and fixing the sealing ring, and at the same time, excess sealing glue overflows along the slot into the gap between the steel collar and the steel ring, further improving the sealing performance.

[0010] Preferably, a plurality of overflow holes are provided inside the sealing ring, the overflow holes penetrate and connect the inner surface of the sealing ring and the protruding surface, and a plurality of side holes are provided at the protruding position of the sealing ring, and the side holes are connected to the overflow holes; the sealing glue flows into the card slot, then flows along the overflow holes, and merges with the sealing glue in the groove to fully fill the gap between the sealing ring and the groove, and the sealing glue flows along the side holes, thereby increasing the effective contact area between the sealing glue and the sealing ring, increasing the stability and anti-deformation strength, and also for improving the sealing between the steel ring and the steel ring.

[0011] Preferably, fixing holes are provided on the collar portion, the embedded portion and the annular seat, and a fastening screw is passed through the fixing hole. The inner end of the fastening screw is welded with a limiting plate, and the outer end of the fastening screw passes through the fixing holes on the annular seat, the embedded portion and the collar portion in sequence, and is fastened to the horizontal plane of the outer surface of the collar portion by a nut; two adjacent pipe sections are connected together through the steel collar, and when the pipe section body is subjected to axial force, the pipe section body can be stabilized together, but when the two adjacent pipe sections are subjected to radial force, gaps are likely to appear between the steel collars and the steel rings, affecting the sealing performance. For this reason, fastening screws are provided on the steel collar and the steel ring, and the fastening screws are arranged along the annular shape of the steel collar. The fastening screws fix the steel collar and the steel ring together, and the force is evenly distributed, while increasing the radial resistance between the two pipe sections and improving the firmness between the two adjacent pipe sections.

[0012] Preferably, a fastening assembly is provided on each side of the limit plate; the fastening assembly includes a traction rod, a sleeve and a fixing seat; both ends of the sleeve are threadedly connected to one end of the traction rod, the other end of one of the traction rods is rotatably connected to the fixing seat, the fixing seat is fixed to the pipe section by an expansion screw, and the other end of the other traction rod is rotatably connected to the limit plate; by setting the fastening assembly, after the fastening screw is tightened, the sleeve is rotated, the sleeve pulls the traction rod, the traction rod pulls the pipe section body, and the pipe section bodies are pulled closer to each other, thereby further improving the stability and connection strength between the two pipe sections.

[0013] Preferably, a rubber tube is provided in the fixing hole, and a ring-shaped cavity is provided in the middle position of the rubber tube, and sealant and a pointed cone are contained in the cavity. The diameter in the middle position of the rubber tube is smaller than the diameter at both ends, and the end of the pointed cone is fixed to the inner ring surface of the cavity, and the tip of the pointed cone points to the outer surface of the cavity rubber tube; the fastening screw passes through the fixing hole, and a gap remains between the fixing hole and the fastening screw. The moisture in the concrete will penetrate into the pipe segment along the gap. For this purpose, a rubber tube is provided, and the rubber tube is inserted into the fixing hole, and the fastening screw is inserted into the rubber tube. The fastening screw and the fixing hole are filled and sealed by the rubber tube, and the cavity in the middle position of the rubber tube is squeezed at the same time, and the pointed cone pierces the cavity, so that the sealant in the cavity overflows into the fixing hole, and the sealant fills the gap again, thereby improving the sealing between the fastening screw and the fixing hole.

[0014] Preferably, a plurality of strip grooves are provided on the surface of the rubber tube, the strip grooves are provided along the axis of the rubber tube, and the middle position of the strip grooves is opposite to the tip position of the pointed cone; after the sealant overflows out of the cavity, it flows along the strip grooves, so that the sealant fully covers the surface of the rubber tube, which helps to improve the sealing between the rubber tube and the fixing hole.

[0015] Preferably, a boss is provided at the position where the threaded hole is opened on the connecting disk, and the threaded hole passes through the boss; by providing the boss, the number of threaded connection circles between the fastening bolt and the connecting disk is extended, thereby improving the connection stability between the fastening bolt and the connecting disk.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention relates to a detachable rectangular tunnel pipe section, wherein the steel collar and the steel ring are detachably arranged with the pipe section; the steel collar and the steel ring are respectively fixed to the two ends of the pipe section by fastening bolts, and recesses are provided at the two ends of the through hole through which the fastening bolts pass, so that after the fastening bolts are tightened, the outer ends of the fastening bolts can be placed in the recesses and be flush with the two ends of the through hole, so that after the two pipe sections are connected to each other, the outer end faces of the steel rings are tightly attached to the inner side walls of the steel collars, thereby ensuring the sealing between the two pipe sections; after the steel collar or the steel ring collides with external objects and is damaged, the steel collar or the steel ring can be removed from the pipe section for repair or replacement with new steel collar and steel rings, which is convenient and quick, avoids waste, and reduces losses.

[0018] 2. The detachable rectangular tunnel pipe segment described in the present invention has a steel connecting plate provided in the pipe segment body when the pipe segment body is prefabricated, and the fastening bolts pass through the through holes and are threadedly connected to the threaded holes on the connecting plate. At this time, the ends of the fastening bolts are not connected to the concrete on the pipe segment body, but the anti-disassembly force between the steel sleeve and the pipe segment body is concentrated on the connecting plate and the steel sleeve, thereby ensuring the firmness between the steel sleeve and the pipe segment body, and the steel ring is also connected to the connecting plate as described above, thereby ensuring the firmness between the steel ring and the pipe segment body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a three-dimensional diagram of the detachable rectangular tunnel pipe section of the present invention;

[0021] Figure 2 It is a three-dimensional diagram of the coordination diagram of the detachable tunnel rectangular pipe section of the present invention;

[0022] Figure 3 This is a cross-sectional view of the detachable rectangular tunnel pipe section of the present invention;

[0023] Figure 4 yes Figure 3A partial enlarged view of the middle part;

[0024] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0025] Figure 6 It is a three-dimensional diagram of the rubber in the present invention;

[0026] Figure 7 is a cross-sectional view of the rubber of the present invention;

[0027] Figure 8 It is a three-dimensional diagram of the connecting disk of the present invention;

[0028] In the figure: pipe segment 1, steel collar 2, steel ring 3, collar part 4, annular plate 5, through hole 6, fastening bolt 7, embedded part 8, annular seat 9, steel bar 10, connecting plate 11, threaded hole 12, groove 13, card slot 1, sealing ring 15, No. 1 glue injection hole 16, No. 2 glue injection hole 17, overflow hole 18, side hole 19, fixing hole 20, fastening screw 21, limit plate 22, traction rod 23, sleeve 24, fixing seat 25, rubber tube 26, cavity 27, pointed cone 28, strip groove 29, boss 30. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] Example 1:

[0031] Reference Figure 1 、 Figure 2 Figure 3 and Figure 4A detachable tunnel rectangular pipe segment comprises a pipe segment body 1, one end face of the pipe segment body 1 is provided with a steel collar 2, and the other end of the pipe segment body 1 is provided with a steel ring 3; the steel collar 2 comprises a collar portion 4 and an annular plate 5; the end face of the annular plate 5 is evenly provided with a plurality of through holes 6, and fastening bolts 7 pass through the through holes 6. The annular plate 5 is fixed to one end face of the pipe segment by the fastening bolts 7. The outer ring of the annular plate 5 is the collar portion 4, and the collar portion 4 is wide-mouthed, and the collar portion 4 is embedded with a steel ring 3; the steel ring 3 comprises an embedded portion 8 and an annular seat 9; the end face of the annular seat 9 is evenly provided with a plurality of through holes 6, and fastening bolts 7 pass through the through holes 6. The annular seat 9 is fixed to the other end face of the pipe segment by fastening bolts 7, and the outer ring of the annular seat 9 is the embedded part 8; in the process of tunnel excavation, in order to prevent earthwork from collapsing and causing construction accidents, during the excavation process, the pipe segments with rectangular end faces are laid while excavating, and the pipe segments are gradually laid in the culvert that has been dug; after the pipe segments are prefabricated, they are hoisted onto the vehicle by the hoisting device and transported to the construction site, and then unloaded by the hoisting device and laid flat on the construction site. When put into use, the pipe segments are hoisted to be perpendicular to the ground by the hoisting device, and then hoisted into the culvert; the pipe segments undergo multiple hoisting processes from production to commissioning. The pipe segment is relatively heavy and during the lifting process, the pipe segment swings and is difficult to control, and the steel collar 2 on the pipe segment is relatively weak. When external objects collide with the edge of the steel collar 2, it is easy to cause the steel collar 2 to break, resulting in the steel collar 2 being difficult to seal and fit on the steel ring 3 on another pipe segment when it is put into use later. When the pipe segment is manufactured, the steel collar 2 and the pipe segment are integrally processed and formed. If the steel collar 2 is seriously damaged and cannot be used, the pipe segment cannot be put into use, causing waste, increasing investment costs, and extending construction time. In the present invention, the steel collar 2 and the steel ring 3 are arranged to be detachable from the pipe segment; the steel collar 2 and the steel ring 3 are connected by The fastening bolts 7 are fixed on both ends of the pipe segment body 1 respectively, and recesses are provided at the two ends of the through hole 6 through which the fastening bolts 7 pass, so that after the fastening bolts 7 are tightened, the outer ends of the fastening bolts 7 can be placed in the recesses and are flush with the two ends of the through hole 6, so that after the two pipe segments 1 are connected to each other, the outer end faces of the steel rings 3 are tightly attached to the inner walls of the steel sleeves 2, ensuring the sealing between the two pipe segments 1; after the steel sleeves 2 or 3 are damaged by colliding with external objects, they can be removed from the pipe segment body 1 for repair or replacement with new steel sleeves 2 and 3, which is convenient and quick, avoids waste, and reduces losses.

[0032] Reference Figure 3 and Figure 4The axial steel bars 10 inside the pipe segment body 1 are fixedly connected with a ring-shaped connecting plate 11, and a plurality of threaded holes 12 are provided on the connecting plate 11. The threaded holes 12 correspond to the positions of the through holes 6. The fastening bolts 7 pass through the through holes 6 and are threadedly connected in the threaded holes 12. When the pipe segment body 1 is prefabricated, a steel connecting plate 11 is provided in the pipe segment body 1. The fastening bolts 7 pass through the through holes 6 and are threadedly connected in the threaded holes 12 on the connecting plate 11. At this time, the end of the fastening bolt 7 is not connected to the concrete on the pipe segment body 1, but the anti-disassembly force between the steel collar 2 and the pipe segment body 1 is concentrated on the connecting plate 11 and the steel collar 2, thereby ensuring the firmness between the steel collar 2 and the pipe segment body 1, and the steel ring 3 is also connected to the connecting plate 11 as described above, thereby ensuring the firmness between the steel ring 3 and the pipe segment body 1.

[0033] Reference Figure 4 and Figure 5 , a ring-shaped groove 13 is provided on the inclined surface of the inner surface of the collar portion 4; a ring-shaped card groove 14 is provided on the inclined surface of the outer surface of the front end of the embedded portion 8, and a ring-shaped sealing ring 15 is provided in the card groove 14. The cross section of the sealing ring 15 is T-shaped, and the protruding card groove 14 part of the sealing ring 15 is embedded in the groove 13; when the pipe segment is put into use, it is also necessary to spray anti-corrosion paint on the surface of the steel collar 2 and the steel ring 3 to reduce the erosion of soil moisture on the steel material and fill the potholes and uneven surfaces on the surface. The steel collar 2 and the steel ring 3 are both made of steel materials, and there will be residual gaps when docking. These residual gaps will cause moisture to penetrate into the interior of the pipe segment body 1. A single spray anti-corrosion paint The paint still fails to ensure the sealing between the pipe sections. For this purpose, a sealing ring 15 and a groove 13 are provided. When the steel ring 2 and the steel ring 3 are plugged in, the sealing ring 15 is gradually embedded in the groove 13, thereby improving the sealing between the steel ring 2 and the steel ring 3, thereby improving the sealing between the two adjacent pipe sections. When the steel ring 3 is embedded in the steel ring 2, the steel ring 3 squeezes the steel ring 2 and rubs the sealing ring 15. At this time, the sealing ring 15 may be offset and misplaced, resulting in poor sealing. The sealing ring 15 of the present invention is embedded in the card groove 14 to restrict the sealing ring 15 and prevent the sealing ring 15 from moving out of position, thereby ensuring that the sealing ring 15 is accurately embedded in the groove 13.

[0034] Reference Figure 5 The outer surface of the collar portion 4 is provided with a plurality of No. 1 glue injection holes 16, which extend through the groove 13; the outer surface of the embedded portion 8 is provided with a plurality of No. 2 glue injection holes 17, which extend through the bottom of the card slot 14; after the two pipe sections are spliced, sealing glue is injected into the No. 1 glue injection holes 16 and the No. 2 glue injection holes 17, and the sealing glue overflows into the groove 13 and the card slot 14, bonding and fixing the sealing ring 15. At the same time, excess sealing glue overflows along the card slot 14 into the gap between the steel collar 2 and the steel ring 3, further improving the sealing performance.

[0035] Reference Figure 5 , a plurality of overflow holes 18 are opened inside the sealing ring 15, and the overflow holes 18 penetrate and connect the inner surface and the protruding surface of the sealing ring 15, and a plurality of side holes 19 are opened at the protruding position of the sealing ring 15, and the side holes 19 are connected to the overflow holes 18; the sealing glue flows into the card groove 14, and then flows along the overflow holes 18, and merges with the sealing glue in the groove 13, fully filling the gap between the sealing ring 15 and the groove 13, and the sealing glue flows along the side holes 19, thereby increasing the effective contact area between the sealing glue and the sealing ring 15, increasing the stability and anti-deformation strength, and also for improving the sealing between the steel ring 2 and the steel ring 3.

[0036] Reference Figure 4 , the collar portion 4, the embedded portion 8 and the annular seat 9 are all provided with fixing holes 20, and a fastening screw 21 is passed through the fixing hole 20, and the inner end of the fastening screw 21 is welded with a limiting plate 22, and the outer end of the fastening screw 21 passes through the annular seat 9, the embedded portion 8 and the fixing holes 20 on the collar portion 4 in turn, and is fastened to the horizontal plane of the outer surface of the collar portion 4 by a nut; the two adjacent pipe sections are plugged together through the steel collar 2. When the pipe section body 1 is subjected to axial force, the pipe section body 1 can be stable together, but when the two adjacent pipe sections are subjected to radial force, gaps are likely to appear between the steel collar 2 and the steel ring 3, affecting the sealing performance. For this reason, a fastening screw 21 is provided on the steel collar 2 and the steel ring 3. The fastening screw 21 is arranged in an annular manner along the steel collar 2. The fastening screw 21 fixes the steel collar 2 and the steel ring 3 together, and the force is evenly distributed. At the same time, the radial resistance between the two pipe sections is increased, and the firmness between the adjacent two pipe sections is improved.

[0037] Reference Figure 4 , a fastening assembly is provided on each side of the limit plate 22; the fastening assembly includes a traction rod 23, a sleeve 24 and a fixing seat 25; both ends of the sleeve 24 are threadedly connected to one end of the traction rod 23, the other end of one traction rod 23 is rotatably connected to the fixing seat 25, and the fixing seat 25 is fixed to the pipe segment by an expansion screw, and the other end of the other traction rod 23 is rotatably connected to the limit plate 22; by setting the fastening assembly, after the fastening screw 21 is tightened, the sleeve 24 is rotated, the sleeve 24 pulls the traction rod 23, and the traction rod 23 pulls the pipe segment body 1, pulling the pipe segment bodies 1 closer to each other, further improving the stability and connection strength between the two pipe segment bodies 1.

[0038] Reference Figure 5 、 Figure 6 and Figure 7The fixing hole 20 is provided with a rubber tube 26, and a ring-shaped cavity 27 is provided in the middle of the rubber tube 26. The cavity 27 contains sealant and a pointed cone 28. The diameter of the middle position of the rubber tube 26 is smaller than the diameter of its two ends. The end of the pointed cone 28 is fixed to the inner surface of the cavity 27, and the tip of the pointed cone 28 points to the outer surface of the rubber tube 26 in the cavity 27; the fastening screw 21 passes through the fixing hole 20, and there is a gap between the fixing hole 20 and the fastening screw 21. The moisture in the concrete will flow along The rubber tube 26 is inserted into the fixing hole 20 and the fastening screw 21 is inserted into the rubber tube 26. The space between the fastening screw 21 and the fixing hole 20 is filled and sealed by the rubber tube 26. At the same time, the cavity 27 in the middle of the rubber tube 26 is squeezed, and the pointed cone 28 pierces the cavity 27, so that the sealant in the cavity 27 overflows into the fixing hole 20. The sealant fills the gap again, thereby improving the sealing between the fastening screw 21 and the fixing hole 20.

[0039] Reference Figure 6 The surface of the rubber tube 26 is provided with a plurality of strip grooves 29 , which are provided along the axis of the rubber tube 26 , and the middle position of the strip groove 29 is opposite to the tip position of the pointed cone 28 ; after the sealant overflows out of the cavity 27 , it flows along the strip grooves 29 , so that the sealant fully covers the surface of the rubber tube 26 , which helps to improve the sealing between the rubber tube 26 and the fixing hole 20 .

[0040] Example 2:

[0041] Reference Figure 8 , compared with Example 1, as another embodiment of the present invention, a boss 30 is provided at the position where the threaded hole 12 is opened on the connecting disk 11, and the threaded hole 12 passes through the boss 30; by providing the boss 30, the number of threaded connection circles between the fastening bolt 7 and the connecting disk 11 is extended, and the connection stability of the fastening bolt 7 and the connecting disk 11 is improved.

[0042] Working principle: In the present invention, the steel collar 2 and the steel ring 3 are arranged to be detachable from the pipe segment; the steel collar 2 and the steel ring 3 are respectively fixed to the two ends of the pipe segment body 1 by fastening bolts 7, and recesses are provided at the two ends of the through hole 6 through which the fastening bolts 7 pass, so that after the fastening bolts 7 are tightened, the outer ends of the fastening bolts 7 can be placed in the recesses and are flush with the two ends of the through hole 6, so that after the two pipe segments 1 are connected to each other, the outer end faces of the steel rings 3 are tightly attached to the inner side walls of the steel collar 2, ensuring the sealing between the two pipe segments 1; after the steel collar 2 or the steel ring 3 collides with external objects and is damaged, the steel collar 2 or the steel ring 3 can be removed from the pipe segment body 1 for repair or replacement with new steel collar 2 and steel ring 3, which is convenient and quick, avoids waste, and reduces losses;

[0043] When the pipe segment 1 is prefabricated, a steel connecting plate 11 is provided inside the pipe segment 1. The fastening bolt 7 passes through the through hole 6 and is threadedly connected to the threaded hole 12 on the connecting plate 11. At this time, the end of the fastening bolt 7 is not connected to the concrete on the pipe segment 1, but the anti-disassembly force between the steel collar 2 and the pipe segment 1 is concentrated on the connecting plate 11 and the steel collar 2, ensuring the firmness between the steel collar 2 and the pipe segment 1. The steel ring 3 is also connected to the connecting plate 11 as described above, ensuring the firmness between the steel ring 3 and the pipe segment 1.

[0044] When the pipe joint is put into use, it is necessary to spray anti-corrosion paint on the surface of the steel collar 2 and the steel ring 3 to reduce the erosion of the steel material by soil moisture and fill the potholes and uneven surfaces on the surface. The steel collar 2 and the steel ring 3 are both made of steel. There will be residual gaps when they are connected. These residual gaps will cause moisture to penetrate into the pipe joint body 1. The single spraying of anti-corrosion paint still cannot ensure the sealing between the pipe joints. For this purpose, a sealing ring 15 and a groove 13 are provided. When the steel collar 2 and the steel ring 3 are plugged in, the sealing ring 15 is gradually It is gradually embedded in the groove 13, improving the sealing between the steel ring 2 and the steel ring 3, thereby improving the sealing between the two adjacent pipe sections. When the steel ring 3 is embedded in the steel ring 2, the steel ring 3 squeezes the steel ring 2 and rubs the sealing ring 15. At this time, the sealing ring 15 may be offset and misplaced, resulting in poor sealing. The sealing ring 15 of the present invention is embedded in the card groove 14, which restricts the sealing ring 15 and prevents the sealing ring 15 from being misplaced, thereby ensuring that the sealing ring 15 is accurately embedded in the groove 13.

[0045] After the two pipe sections are joined, sealant is injected into the No. 1 and No. 2 injection holes 16 and 17. The sealant overflows into the groove 13 and the clamping groove 14, bonding and fixing the sealing ring 15. At the same time, the excess sealant overflows along the clamping groove 14 into the gap between the steel sleeve ring 2 and the steel ring 3, further improving the sealing performance.

[0046] The sealing glue flows into the card groove 14, then flows along the overflow hole 18, and merges with the sealing glue in the groove 13 to fully fill the gap between the sealing ring 15 and the groove 13. The sealing glue also flows along the side hole 19, increasing the effective contact area between the sealing glue and the sealing ring 15, increasing the stability and anti-deformation strength, and also improving the sealing between the steel ring 2 and the steel ring 3.

[0047] Two adjacent pipe sections are connected together through the steel collar 2. When the pipe section body 1 is subjected to axial force, the pipe section body 1 can be stable together. However, when the two adjacent pipe sections are subjected to radial force, gaps are likely to appear between the steel collar 2 and the steel ring 3, affecting the sealing performance. For this reason, a fastening screw 21 is provided on the steel collar 2 and the steel ring 3. The fastening screw 21 is arranged in an annular manner along the steel collar 2. The fastening screw 21 fixes the steel collar 2 and the steel ring 3 together, evenly applies force, and at the same time increases the radial resistance between the two pipe sections, thereby improving the firmness between the two adjacent pipe sections.

[0048] By setting up the fastening assembly, after the fastening screw 21 is tightened, the sleeve 24 is rotated, the sleeve 24 pulls the traction rod 23, and the traction rod 23 pulls the pipe segments 1, pulling the pipe segments 1 closer to each other, further improving the stability and connection strength between the two pipe segments 1;

[0049] The fastening screw 21 passes through the fixing hole 20. A gap remains between the fixing hole 20 and the fastening screw 21. Moisture in the concrete will penetrate into the pipe segment 1 along the gap. For this purpose, a rubber tube 26 is provided. The rubber tube 26 is inserted into the fixing hole 20 and pinched. The fastening screw 21 is inserted into the rubber tube 26. The space between the fastening screw 21 and the fixing hole 20 is filled and sealed by the rubber tube 26. At the same time, the cavity 27 in the middle of the rubber tube 26 is squeezed. The pointed cone 28 pierces the cavity 27, causing the sealant in the cavity 27 to overflow into the fixing hole 20. The sealant fills the gap again, thereby improving the sealing between the fastening screw 21 and the fixing hole 20.

[0050] After the sealant overflows out of the cavity 27, it flows along the strip groove 29, so that the sealant fully covers the surface of the rubber tube 26, which helps to improve the sealing between the rubber tube 26 and the fixing hole 20; by providing the boss 30, the number of threaded connection turns between the fastening bolt 7 and the connecting plate 11 is extended, thereby improving the connection stability of the fastening bolt 7 and the connecting plate 11.

[0051] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable rectangular tunnel pipe section, characterized by: It comprises a pipe segment body (1), one end face of the pipe segment body (1) is provided with a steel collar (2), and the other end of the pipe segment body (1) is provided with a steel ring (3); the steel collar (2) comprises a collar portion (4) and an annular plate (5); the end face of the annular plate (5) is uniformly provided with a plurality of through holes (6), a fastening bolt (7) is passed through the through holes (6), the annular plate (5) is fixed to one end face of the pipe segment body (1) by the fastening bolt (7), the outer ring of the annular plate (5) is the collar portion (4), the collar portion (4) is wide-mouthed, and the collar portion (4) is embedded with a steel ring (3); the steel ring (3) comprises an embedded portion (8) and an annular seat (9); the end face of the annular seat (9) is uniformly provided with a plurality of through holes (6), a fastening bolt (7) is passed through the through holes (6), the annular seat (9) is fixed to the other end face of the pipe segment body (1) by the fastening bolt (7), and the outer ring of the annular seat (9) is the embedded portion (8); An annular groove (13) is provided on the inclined surface of the inner surface of the collar portion (4); an annular groove (14) is provided on the inclined surface of the outer surface of the front end of the embedded portion (8); an annular sealing ring (15) is provided in the groove (14); the cross section of the sealing ring (15) is T-shaped, and the protruding portion of the sealing ring (15) outside the groove (14) is embedded in the groove (13); The outer surface of the collar portion (4) is provided with a plurality of No. 1 glue injection holes (16), which extend through the groove (13); the outer surface of the embedded portion (8) is provided with a plurality of No. 2 glue injection holes (17), which extend through the inner bottom of the slot (14); The collar portion (4), the embedded portion (8) and the annular seat (9) are all provided with fixing holes (20), a fastening screw (21) is passed through the fixing hole (20), the inner end of the fastening screw (21) is welded with a limiting plate (22), and the outer end of the fastening screw (21) passes through the fixing holes (20) on the annular seat (9), the embedded portion (8) and the collar portion (4) in sequence, and is fastened to the horizontal surface of the outer surface of the collar portion (4) by a nut; A fastening assembly is provided on each side of the limiting plate (22); the fastening assembly comprises a traction rod (23), a sleeve (24) and a fixing seat (25); both ends of the sleeve (24) are threadedly connected to one end of the traction rod (23), the other end of one of the traction rods (23) is rotatably connected to the fixing seat (25), and the other end of the other traction rod (23) is rotatably connected to the limiting plate (22).

2. The detachable rectangular tunnel pipe section according to claim 1, characterized in that: The axial reinforcement (10) inside the pipe segment body (1) is fixedly connected to a ring-shaped connecting plate (11), and a plurality of threaded holes (12) are provided on the connecting plate (11). The threaded holes (12) correspond to the positions of the through holes (6), and the fastening bolts (7) pass through the through holes (6) and are threadedly connected in the threaded holes (12).

3. The detachable rectangular tunnel pipe section according to claim 1, characterized in that: A plurality of overflow holes (18) are provided inside the sealing ring (15), and the overflow holes (18) penetrate and connect the inner surface and the protruding surface of the sealing ring (15). A plurality of side holes (19) are provided at the protruding position of the sealing ring (15), and the side holes (19) are connected to the overflow holes (18).

4. The detachable rectangular tunnel pipe section according to claim 1, characterized in that: A rubber tube (26) is provided in the fixing hole (20), and a ring-shaped cavity (27) is provided in the middle of the rubber tube (26). A sealant and a pointed cone (28) are contained in the cavity (27). The diameter of the middle position of the rubber tube (26) is smaller than the diameter of the two ends thereof. The end of the pointed cone (28) is fixed to the inner ring surface of the cavity (27), and the tip of the pointed cone (28) points to the outer surface of the rubber tube (26) in the cavity (27).

5. The detachable rectangular tunnel pipe section according to claim 4, characterized in that: The surface of the rubber tube (26) is provided with a plurality of strip grooves (29), the strip grooves (29) being provided along the axis of the rubber tube (26), and the middle position of the strip grooves (29) being opposite to the tip position of the pointed cone (28).

6. The detachable rectangular tunnel pipe section according to claim 2, characterized in that: A boss (30) is provided at the location where the threaded hole (12) is provided on the connection plate (11), and the threaded hole (12) passes through the boss (30).

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