A kind of urban underground comprehensive pipe gallery and construction method thereof

Abstract

The present invention discloses an urban underground integrated pipe gallery and a construction method thereof, which relates to the technical field of urban integrated pipe networks, and is used to solve the problem that the existing technology uses foundation treatment, trenching and sand filling, flexible joints and other methods to reduce the damage of ground fissures to bottom line pipelines, but the effect is poor. The urban underground integrated pipe gallery of the present invention includes a plurality of pipe sections, and the plurality of pipe sections include: a plurality of first pipe sections; at least one second pipe section, the second pipe section and the first pipe section have the same shape, and the cross-sectional area of ​​the second pipe section is larger than the cross-sectional area of ​​the first pipe section; at least two connecting pipe sections, and the connecting pipe section connects the second pipe section with the first pipe section.

Description

Technical Field

[0001] The present invention relates to the technical field of urban integrated pipe networks, and in particular to an urban underground integrated pipe gallery and a construction method thereof. Background Art

[0002] Urban underground comprehensive pipeline corridor is one of the important linear projects in urban infrastructure. It is inevitable to cross ground fissures during its construction. Existing engineering examples show that due to the influence of ground fissures, underground pipelines often break and stagger up and down, that is, the emergence and existence of ground fissures have caused serious harm to underground linear projects.

[0003] Many scholars have studied the impact of uneven soil settlement on underground linear engineering, and have mainly proposed three treatment solutions represented by foundation treatment, trenching and sand filling, and the use of flexible joints. Existing engineering practices have shown that the above three measures have a certain effect on reducing the damage of uneven soil settlement to underground pipelines. However, compared with general uneven soil settlement (mainly induced by soil consolidation settlement), ground fissure deformation has the characteristics of large deformation amplitude and long duration. Therefore, the use of foundation treatment and trenching and sand filling measures cannot be fully applied to pipelines in the area affected by ground fissures; and the impact of ground fissure deformation on pipelines is a section rather than a point, so only the use of flexible joints, although it can reduce the damage of ground fissures to pipelines to a certain extent, its prevention and control effect is poor. Summary of the invention

[0004] The present invention provides an urban underground comprehensive pipe gallery and a construction method thereof, which are used to solve the problem that the damage of ground fissures to bottom line pipelines is reduced by using foundation treatment, trenching and sand filling, flexible joints and the like in the prior art, but the effect is poor.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] In a first aspect, the present invention provides an urban underground integrated pipe corridor, comprising a plurality of pipe sections, wherein the plurality of pipe sections include: a plurality of first pipe sections; at least one second pipe section, wherein the second pipe section has the same shape as the first pipe section and the cross-sectional area of ​​the second pipe section is greater than the cross-sectional area of ​​the first pipe section; and at least two connecting pipe sections, wherein the connecting pipe sections connect the second pipe section with the first pipe section.

[0007] Optionally, the first pipe section, the second pipe section and the connecting pipe section are all made of glass fiber reinforced polyurethane composite materials.

[0008] Optionally, it also includes: a plurality of flexible pipe gallery joints, wherein the flexible pipe gallery joints are used for sealingly connecting two adjacent pipe sections.

[0009] Optionally, the cross-section of the pipe segment is a rectangle with corners and arms.

[0010] Optionally, the inner wall height h1 of the second pipe section satisfies: h1 = h3 + 2 × d v , Wherein, h3 is the inner wall height of the first pipe section, d v The reserved width for the vertical deformation of the pipe gallery, V v is the vertical activity rate between the upper and lower walls of the ground fissure, T is the design service life of the pipeline corridor, It is the correction coefficient of the vertical deformation of the corridor.

[0011] Optionally, the inner wall width b1 of the second pipe section satisfies: b1=b3+2×d h , Wherein, b3 is the inner wall width of the first pipe section, d h Reserve width for horizontal deformation of the pipe gallery, V h is the horizontal activity rate between the upper and lower walls of the ground fissure, T is the design service life of the pipeline corridor, It is the correction coefficient of the horizontal deformation of the corridor.

[0012] Optionally, the first end of the connecting pipe segment is connected to the first pipe segment, and the second end of the connecting pipe segment is connected to the second pipe segment. The outer diameter of the connecting pipe segment gradually increases from the first end to the second end, and the angle between the pipe wall of the connecting pipe segment and the horizontal direction ranges from 15° to 30°.

[0013] The multiple pipe sections of the urban underground comprehensive pipe gallery provided by the present invention include multiple first pipe sections, at least one second pipe section and at least two connecting pipe sections. When crossing a ground fissure, the second pipe section is arranged at the ground fissure, and the second pipe section is connected to the first pipe sections located on both sides of the ground fissure through the connecting pipe sections. Since the second pipe section and the first pipe section have the same shape and the cross-sectional area of ​​the second pipe section is larger than the cross-sectional area of ​​the first pipe section, that is, the area of ​​the second pipe section is larger, the shear resistance is improved, and the section can withstand the larger shear force caused by the ground fissure, thereby reducing the breaking or deformation of the pipe sections of the urban underground comprehensive pipe gallery; and even if the ground fissure causes the deformation of the second pipe section, since the reserved gap between the second pipe section and the pipeline wall inside the second pipe section is larger, the second pipe section has a larger deformation space, so that the deformed second pipe section will not have a significant impact on the normal use of the pipeline inside the pipe gallery.

[0014] In the second aspect, the present invention provides a construction method for an urban underground integrated pipe corridor for the above-mentioned technical solution, comprising the following steps: a connecting pipe section, a second pipe section, another connecting pipe section and another first pipe section are installed in sequence at one end of a first pipe section by a hoisting manner, and two adjacent pipe sections are fixedly connected by a flexible pipe corridor joint.

[0015] Optionally, the cross-section of the first pipe section, the cross-section of the second pipe section, the cross-section of the connecting pipe section and the flexible pipe gallery joint are all rectangles with corners and arms, and the flexible pipe gallery joint includes a flexible joint body, which is formed by splicing four right-angle pipe gallery joint segments and multiple strip pipe gallery joint segments; the connection between two adjacent pipe sections through the flexible pipe gallery joint specifically includes: installing the four right-angle pipe gallery joint segments in one of the flexible pipe gallery joints on the four corners of one of the pipe sections; sealingly installing one or more strip pipe gallery joint segments between two adjacent right-angle pipe gallery joint segments; connecting another pipe section to the flexible pipe gallery joint.

[0016] Optionally, the flexible pipe gallery joint includes a flexible joint body, an internal mounting plate, a plurality of fasteners and an external mounting plate, the internal mounting plates are respectively located in the flexible joint body, one end of the plurality of fasteners are connected to the internal mounting plates, the other ends of the plurality of fasteners pass through the inner wall of the flexible joint body and are located on the outside of the flexible joint body, the external mounting plate is provided with a plurality of mounting holes that cooperate with the fasteners, the fasteners are internal bolts, and the flexible joint body is provided with at least two grooves, which can be sealed and clamped with the ends of the pipe sections; the connection between the two adjacent pipe sections through the flexible pipe gallery joint specifically includes: inserting one of the pipe sections into a groove of the flexible joint body, and inserting the other pipe section into another groove of the flexible joint body; placing the external mounting plate on the inner side of the flexible joint body, the plurality of fasteners in the flexible pipe gallery joint respectively pass through the plurality of mounting holes correspondingly and are connected to the external mounting plate, and the two pipe sections are pressed tightly by the cooperation of nuts and fasteners.

[0017] Optionally, when placing the external mounting plate on the inner side of the flexible joint body, a plurality of fasteners in the flexible pipe gallery joint respectively pass through a plurality of mounting holes to be connected to the external mounting plate, and after the two pipe sections are compressed by the cooperation of nuts and fasteners, it also includes: bonding each of the external mounting plates to the contact surface of the flexible joint body.

[0018] The construction method of the urban underground comprehensive pipe gallery provided by the present invention comprises the following steps: when crossing a ground fissure, a connecting pipe segment, a second pipe segment, another connecting pipe segment and another first pipe segment are sequentially installed at one end of a first pipe segment on one side of the ground fissure in a hoisting manner, and two adjacent pipe segments are fixedly connected by a flexible pipe gallery joint, wherein the second pipe segment is arranged at the ground fissure. Since the second pipe segment and the first pipe segment have the same shape and the cross-sectional area of ​​the second pipe segment is larger than the cross-sectional area of ​​the first pipe segment, that is, the area of ​​the second pipe segment is larger, the shear resistance is improved, and the second pipe segment can withstand a larger shear force caused by the ground fissure, thereby reducing the breaking or deformation of the pipe segments of the urban underground comprehensive pipe gallery; and even if the ground fissure causes the deformation of the second pipe segment, since the reserved gap between the second pipe segment and the pipeline wall therein is larger, the second pipe segment has a larger deformation space, so that the deformed second pipe segment will not have a significant impact on the normal use of the pipeline inside the pipe gallery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A partial cross-sectional schematic diagram of an urban underground comprehensive pipe gallery according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a flexible joint in an urban underground integrated pipe gallery according to an embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a right-angle pipe gallery joint section of a flexible joint in an urban underground comprehensive pipe gallery according to an embodiment of the present invention;

[0023] Figure 4 It is a cross-sectional schematic diagram of a right-angle pipe gallery joint section of a flexible joint in an underground comprehensive pipe gallery according to an embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram of a strip-shaped pipe gallery joint section of a flexible joint in an underground comprehensive pipe gallery according to an embodiment of the present invention;

[0025] Figure 6 It is a cross-sectional schematic diagram of a strip-shaped pipe gallery joint section of a flexible joint in an underground comprehensive pipe gallery according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of an external mounting plate in an underground integrated pipe gallery according to an embodiment of the present invention;

[0027] Figure 8This is one of the cross-sectional schematic diagrams of connecting pipe sections in an underground comprehensive pipe gallery according to an embodiment of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the second pipe section in the underground comprehensive pipe gallery according to an embodiment of the present invention;

[0029] Fig.10 It is a cross-sectional schematic diagram of the second pipe section in the underground comprehensive pipe gallery according to an embodiment of the present invention;

[0030] Fig.11 It is a structural schematic diagram of a connecting pipe section in an underground comprehensive pipe gallery according to an embodiment of the present invention;

[0031] Fig.12 This is the second cross-sectional schematic diagram of the connecting pipe segment in the underground comprehensive pipe gallery according to the embodiment of the present invention;

[0032] Fig.13 It is a schematic end view of a first end of a connecting pipe segment in an underground integrated pipe gallery according to an embodiment of the present invention;

[0033] Fig.14 It is a schematic end view of the second end of the connecting pipe segment in the underground comprehensive pipe gallery according to an embodiment of the present invention;

[0034] Fig.15 It is a structural schematic diagram of the first pipe section in the underground comprehensive pipe gallery according to an embodiment of the present invention;

[0035] Fig.16 It is a cross-sectional schematic diagram of the first pipe section in the underground comprehensive pipe gallery according to an embodiment of the present invention;

[0036] Fig.17 A schematic diagram of the size relationship between the second pipe segment and the connecting pipe segment in the underground comprehensive pipe gallery according to an embodiment of the present invention;

[0037] Fig.18 A numerical simulation model of an urban underground comprehensive pipe gallery according to an embodiment of the present invention;

[0038] Fig.19 It is a numerical simulation model of the traditional concrete pipe gallery;

[0039] Fig. 20 This is the stress distribution diagram of the traditional concrete pipe gallery along the axial direction (Y direction);

[0040] Fig.21 This is the shear stress distribution diagram of the traditional concrete pipe gallery along the Z direction;

[0041] Fig. 22 This is a stress distribution diagram of the urban underground comprehensive pipe gallery along the axial direction (Y direction) according to an embodiment of the present invention;

[0042] Fig.23 This is a shear stress distribution diagram of an urban underground comprehensive pipe gallery along the Z direction according to an embodiment of the present invention;

[0043] Fig.24 This is one of the flow diagrams of the construction method of the urban underground comprehensive pipe gallery according to an embodiment of the present invention;

[0044] Fig.25 This is the second flow chart of the construction method of the urban underground comprehensive pipeline corridor according to the embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of the present invention, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] Reference Figure 1 , Fig. 9 , Fig.15 and Fig.17 The urban underground integrated pipe gallery of the embodiment of the present invention includes multiple pipe segments 1, and the multiple pipe segments 1 include multiple first pipe segments 11, at least one second pipe segment 12 and at least two connecting pipe segments 13, wherein the first pipe segments 11 and the second pipe segments 12 have the same shape, the cross-sectional area of ​​the second pipe segments 12 is larger than the cross-sectional area of ​​the first pipe segments 11, and the connecting pipe segments 13 connect the second pipe segments 12 with the first pipe segments 11.

[0049] The multiple pipe sections 1 of the urban underground comprehensive pipe gallery provided by the present invention include multiple first pipe sections 11, at least one second pipe section 12 and at least two connecting pipe sections 13. When crossing a ground fissure, the second pipe section 12 is arranged at the ground fissure, and the second pipe section 12 is connected to the first pipe sections 11 located on both sides of the ground fissure through the connecting pipe sections 13. Since the first pipe section 11 and the second pipe section 12 have the same shape, the cross-sectional area of ​​the second pipe section 12 is larger than the cross-sectional area of ​​the first pipe section 11, that is, the area of ​​the second pipe section 12 is increased, the shear resistance is improved, and the pipe section 1 of the urban underground comprehensive pipe gallery can be reduced from being broken or deformed; and even if the ground fissure causes the deformation of the second pipe section 12, due to the large reserved gap between the second pipe section 12 and the pipeline wall inside it, the second pipe section 12 has a large deformation space, so that the deformed second pipe section 12 will not have a significant impact on the normal use of the pipeline inside the pipe gallery.

[0050] It should be noted that the cross section of the pipe section 1 can be rectangular or circular. For the second pipe section 12 and the first pipe section 11 both of which have rectangular cross sections, the wall thickness of the first pipe section 11 can be designed to be the same as that of the second pipe section 12, and the outer wall width of the second pipe section 12 can be greater than the outer wall width of the first pipe section 11, or the wall thickness of the first pipe section 11 can be designed to be the same as that of the second pipe section 12, and the outer wall height of the second pipe section 12 can be greater than the outer wall height of the first pipe section 11; for the second pipe section 12 and the first pipe section 11 both of which have circular cross sections, the wall thickness of the first pipe section 11 can be designed to be the same as that of the second pipe section 12, and the outer diameter of the second pipe section 12 can be greater than the outer diameter of the first pipe section 11. The number of the second pipe sections can be equal to the number of actual ground fissures.

[0051] In order to further improve the structural strength of the pipe segment 1, the first pipe segment 11, the second pipe segment 12 and the connecting pipe segment 13 are made of glass fiber reinforced polyurethane composite materials. Compared with concrete, glass fiber reinforced polyurethane composite materials not only have higher compressive strength, but also have tensile strength close to compressive strength, and their elastic modulus is smaller. Therefore, when the ground fissures are active, the stress generated when the pipe segment 1 made of glass fiber reinforced polyurethane composite materials deforms itself is smaller, which reduces the cracking of the pipe wall of the pipe segment 1 during the ground fissure activity; and the pipe segment 1 can better improve the stress state of the pipeline corridor itself in the area affected by the ground fissures, reducing the adverse effects of uneven settlement caused by the ground fissures on the durability of the pipeline corridor. During use, the pipe segment 1 is not easy to crack, has a higher anti-seepage ability, and is conducive to application in an environment with a high groundwater level.

[0052] It should be noted that there are many methods for making the above-mentioned glass fiber reinforced polyurethane composite material. The glass fiber reinforced polyurethane composite material used in the pipe segment 1 in the embodiment of the present invention is prepared according to the preparation method of glass fiber reinforced polyurethane composite material recorded in the master's thesis "Research on Variable Glass Fiber Reinforced Reaction Injection Molding Process". Since the glass fiber reinforced polyurethane composite material is made by injection molding process, the material hardens quickly and has high early strength, which can greatly shorten the construction period in the process of pipe segment production; compared with the traditional integrated pipe corridor made of concrete, since the raw materials for preparing the glass fiber reinforced polyurethane composite material are mainly liquid raw materials, it has stronger fluidity. In the process of preparing the pipe segment 1 of the glass fiber reinforced polyurethane composite material, the vibration process in the process of making the pipe segment of the traditional concrete pipe corridor can be omitted, and its plasticity is good, and the quality of the pipe segment is easier to ensure.

[0053] In some embodiments, the above-mentioned urban underground integrated pipe gallery further includes: a plurality of flexible pipe gallery joints 14, and the flexible pipe gallery joints 14 are used for sealing and connecting two adjacent pipe sections 1, such as Figure 1 When the ground fissures are active, the pipe segment 1 is subjected to the shear force of the ground fissures and is squeezed with the adjacent pipe segments. The flexible joint can alleviate the mutual squeezing force between the two adjacent pipe segments 1 through its own deformation. The flexible joint has a good deformation compensation effect, which can further prevent the damage of the pipe segment 1, and realize a smooth transition from the cross-sectional size and cross-sectional shear stiffness of the corridor, which effectively improves the stress state of the original corridor pipe segment 1 and joints under the activity of the ground fissures.

[0054] Furthermore, the cross section of the pipe section 1 is a rectangle with corners and arms, which improves the structural strength of the rectangular pipe section at the corners compared to the pipe section with a rectangular cross section, that is, the corner structural strengths of the first pipe section 11, the second pipe section 12 and the connecting pipe section 13 are all higher.

[0055] It should be noted that: for the solution that multiple pipe sections 1 in the urban underground comprehensive pipe gallery are all rectangular with corners and arms, the flexible pipe gallery joint 14 is a rectangular with corners and arms that matches the pipe section 1, such as Figure 2 As shown, the assembly between the flexible joint and the pipe section 1 is facilitated.

[0056] Furthermore, the above-mentioned flexible pipe gallery joint 14 includes a flexible joint body 141, which is formed by splicing a plurality of flexible joint body segments 1411 end to end. By changing the length of the flexible joint body segment 1411, it can be suitable for connecting pipe sections 1 of different sizes, so that the application range of the flexible pipe gallery joint 14 is wider and the construction difficulty of connecting the flexible pipe gallery joint 14 with the pipe section 1 is reduced.

[0057] For the solution that the flexible pipe gallery joint 14 is a rectangle with an armpit at the corner, the multiple flexible joint body segments 1411 include four right-angle pipe gallery joint segments 1411a and multiple strip pipe gallery joint segments 1411b, that is, the flexible joint body 141 is formed by splicing four right-angle pipe gallery joint segments 1411a and multiple strip pipe gallery joint segments 1411b, and one or more strip pipe gallery joint segments 1411b are spliced ​​between two adjacent right-angle pipe gallery joint segments 1411a. Figure 2 As shown, by changing the length or number of the strip-shaped pipe gallery joint segments 1411b, the flexible pipe gallery joint can be adapted to connect pipe sections 1 of different sizes.

[0058] In order to increase the connection force of the multiple flexible joint body sections 1411, both ends of the multiple flexible joint body sections 1411 are provided with a tooth groove 1412, and the tooth groove 1412 at the end of one flexible joint body section 1411 can be spliced ​​with the tooth groove 1412 at the end of another flexible joint body section 1411. Figures 2 to 6 Of course, other groove shapes can also be used, such as a dovetail groove at one end of the flexible joint body section 1411, and a protrusion that matches the dovetail groove at the other end of the flexible joint body section 1411. Compared with the dovetail groove, the horse tooth groove 1412 has more teeth and better sealing performance.

[0059] Furthermore, the flexible joint body 141 is provided with at least two grooves 1413, and the at least two grooves 1413 can be respectively sealed and clamped with the ends of two adjacent pipe sections 1. For example, the cross section of the flexible joint body 141 is an I-shape, such as Figure 3 and Figure 5 As shown, the I-shaped flexible joint body 141 includes an outer annular sealing ring, an inner annular sealing ring and an annular connecting sealing ring connecting the outer annular sealing ring and the inner annular sealing ring. The annular connecting sealing ring is located on the center line of the pipe wall of the outer annular sealing ring and the center line of the pipe wall of the inner annular sealing ring, and the annular connecting sealing ring is perpendicular to the outer annular sealing ring and the inner annular sealing ring, so that two grooves 1413 are formed on both sides of the annular connecting sealing ring. Two adjacent pipe sections 1 can be respectively clamped in the two grooves 1413 of the flexible pipe corridor, which is convenient to install and easy to manufacture. Specifically, the flexible joint body 141 is made of rubber material in one piece. Of course, the two grooves on the above-mentioned flexible joint body 141 may not be completely aligned, that is, the two grooves 1413 overlap partially in the vertical direction, which can be applied to the working condition where the two pipe sections 1 have a certain angle.

[0060] Based on the above embodiment, the flexible pipe gallery joint 14 further includes: a plurality of fasteners 142 and a plurality of mounting plates 143, the fasteners 142 can be inserted into the flexible joint body 141, the plurality of mounting plates 143 are respectively located on both sides of the opening direction of the groove 1413, and every two oppositely arranged mounting plates 142 are connected by a plurality of fasteners 142 to clamp two adjacent pipe sections 1, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 The above scheme realizes the clamping of the two pipe sections 1 sealed and connected by the flexible pipe gallery joint 14 through the connection and cooperation of multiple mounting plates 143 and multiple fasteners 142. The clamping force of the mounting plates 143 on the two pipe sections 1 is reliable, so that the connection force of the two pipe sections 1 is large, and the operation is simple and the construction speed is fast; at the same time, multiple mounting plates 146 can press the flexible pipe gallery joint 14 on the wall surface of the pipe section 1, and the fasteners 142 apply pre-pressure to the flexible pipe gallery joint 14 through the mounting plates 143, so that the flexible joint body 141 between the mounting plates 143 presses the wall surfaces of the pipe section 1 at various locations, further improving the shear resistance of the flexible pipe gallery joint 14 It can effectively prevent the flexible pipe gallery joint 14 from being dislocated or rotated due to external force, and when the flexible pipe gallery joint 14 is deformed, it can automatically compensate for the joint gap to achieve a better sealing effect and have a better waterproof effect. It can not only avoid the influence of water pressure on the waterproof ability of the flexible pipe gallery joint 14, but also effectively avoid the problem of waterproof failure when the flexible pipe gallery joint 14 is subjected to shear force. It can resist the structural waterproof failure caused by the shear force generated on the flexible pipe gallery joint 14 by ground fissure activity, uneven foundation settlement, earthquake and other effects, and avoid the repeated maintenance of the flexible pipe gallery joint 14 and the occurrence of "road zipper".

[0061] In addition, the pre-pressure applied by the mounting plate 143 can effectively connect the plurality of flexible joint body sections together to achieve a higher integrity.

[0062] Further, the plurality of mounting plates 143 include an internal mounting plate 1431 and an external mounting plate 1432, wherein the internal mounting plate 1431 is located in the flexible joint body 141, the fastener 142 is a built-in bolt, and the external mounting plate 1432 is provided with a plurality of mounting holes 143a that cooperate with the fastener 142, one end of the plurality of fasteners 142 is connected to the internal mounting plate 1431, and the other ends of the plurality of fasteners 142 pass through the inner wall of the flexible joint body 141 and are located on the outer side of the flexible joint body 141, such as Figure 2 , Figure 4 , Figure 6 and Figure 7When the flexible pipe gallery joint 14 fixes two pipe sections 1, it is only necessary to align the ends of the multiple fasteners 142 with the mounting holes 143a on the external mounting plate 1432, and pass the ends of the multiple fasteners 142 through the mounting holes 143a on the external mounting plate 1432, and then connect the nuts 144 with the fasteners 142, so that the two pipe sections 1 can be pressed together by the external mounting plate 1432 and the internal mounting plate 1431 to form a reliable pressing force. The mounting plate only needs to be installed on the inner side of the pipe gallery, and the disassembly and assembly operation is convenient. When repairing, it only needs to be carried out inside the pipe gallery, which effectively avoids the need to excavate the soil above the pipe gallery for repair, reduces the difficulty of repair, and has good applicability. Compared with the scheme that multiple mounting plates 143 are all located outside the flexible joint body 141, the flexible joint body 141 is provided with a connection hole that cooperates with the fastener. When the flexible pipe gallery joint 14 fixes two pipe sections 1, it is necessary to first place a mounting plate 143 on the outer wall of the pipe section 1, and align the mounting hole 143a on the mounting plate 143 with the connection hole on the flexible joint body 141, and then insert the bolt with the nut from the outside of the mounting plate 143 into the mounting hole 143a and the connection hole in turn, and then align the mounting hole 143a on another mounting plate 143 on the inner side of the flexible pipe gallery joint 14 with the bolt, insert the bolt into the mounting hole 143a, and then press the two mounting plates 143 against the outer wall of the two pipe sections 1 through the nut, which makes the disassembly and assembly operation more troublesome and the maintenance difficult. Specifically, the fastener 142 is a friction type high-strength bolt, which can apply a large pre-pressure to clamp the two mounting plates and the flexible joint body, generate a large friction force, and thus improve the integrity and rigidity of the flexible pipe gallery joint.

[0063] In some possible embodiments, the contact surface of the external mounting plate 1432 with the flexible joint body 141 is a frosted surface, and the friction between the frosted surface of the external mounting plate 1432 and the flexible joint body 141 is relatively large, which can form an overall force, thereby improving the shear resistance of the external mounting plate 1432. In addition, the internal mounting plate 1431 and the external mounting plate 1432 are both steel plates.

[0064] Furthermore, an adhesive layer is provided between the contact surfaces of the external mounting plate 1432 and the flexible joint body 141 , and the adhesive layer can further improve the connection force between the external mounting plate 1432 and the flexible joint body 141 .

[0065] When designing the inner wall height h1 of the second pipe section 12, the formula h1 = h3 + 2 × d v , Wherein, h3 is the inner wall height of the first pipe section 11, d v The reserved width for the vertical deformation of the pipe gallery, V v is the vertical activity rate between the upper and lower walls of the ground fissure, T is the design service life of the pipeline corridor, is the correction coefficient of the vertical deformation of the pipe gallery. When calculating the inner wall height h1 of the second pipe section 12, the reserved width d of the vertical deformation of the pipe gallery is taken into account. v The vertical activity rate V between the upper and lower walls of the ground fissure v , and through the correction coefficient of the vertical deformation of the corridor The height h1 is corrected so that the inner wall height h1 of the second pipe section 12 calculated by the above formula can bear the pressure, shear force, etc. generated by the ground fissure activity required by the design. It should be noted that: The value range is 0.8~1.2.

[0066] Similarly, when designing the inner wall width b1 of the second pipe section 12, the formula b1 = b3 + 2 × d h , Wherein, b3 is the inner wall width of the first pipe section 11, d h Reserve width for horizontal deformation of the pipe gallery, V h is the horizontal activity rate between the upper and lower walls of the ground fissure, T is the design service life of the pipeline corridor, is the correction coefficient of the horizontal deformation of the pipe gallery. The reserved width d for the horizontal deformation of the pipe gallery is taken into account when calculating the inner wall width b1 of the second pipe segment 12. h The horizontal activity rate V between the upper and lower walls of the ground fissure h , and through the correction coefficient of the horizontal deformation of the corridor The width b1 is corrected so that the inner wall width b1 of the second pipe section 12 calculated by the above formula can bear the pressure, shear force, etc. generated by the ground fissure activity required by the design. It should be noted that: The value range is 0.8~1.2.

[0067] Based on the above embodiment, the first end 131 of the connecting pipe segment 13 is connected to the first pipe segment 11, and the second end 132 of the connecting pipe segment 13 is connected to the second pipe segment 12. The outer diameter of the connecting pipe segment 13 gradually increases from the first end 131 to the second end 132, that is, the angle θ between the pipe wall of the connecting pipe segment 13 and the horizontal direction is greater than 0°. Figure 8 shown.

[0068] Considering that if the angle θ is too small, the length of the connecting pipe section 13 required is too long, which increases the cost of the connecting pipe section; if the angle θ is too large, stress concentration is easy to occur on the connecting pipe section 13, and the stress mutation is too fast. Therefore, in the embodiment of the present invention, the angle θ between the pipe wall of the connecting pipe section 13 and the horizontal direction ranges from 15° to 30°, such as 15°, 20°, 25° or 30°.

[0069] Based on the above technical solution, three pipe segments 1 of urban underground integrated pipe corridors with different sizes are designed below. Among them, the cross-sections of the first pipe segment 11, the second pipe segment 12 and the third pipe segment in the following three embodiments are all rectangular with corners and arms. Fig. 9 , Fig.10 and Fig.17 The relevant parameters of the second pipe section 12 are represented by letters as follows: length L1, wall thickness t1, outer wall width B1, outer wall height H1, inner wall width b1, inner wall height h1 and haunch size s1. Figures 11 to 14 The letters of the relevant parameters of the connecting pipe section 13 are as follows: length L2, wall thickness t2, haunch size s2, outer wall width B of the second end of the connecting pipe section 21 , the outer wall height H of the second end of the connecting pipe segment 21 , the inner wall width b of the second end of the connecting pipe segment 21 , the inner wall height h of the second end of the connecting pipe segment 21 , the outer wall width B of the first end of the connecting pipe segment 22 , the outer wall height H of the first end of the connecting pipe segment 22 , the inner wall width b of the second end of the connecting pipe segment 22 and the inner wall height h of the second end of the connecting pipe segment 22 . Reference Fig.15 , Fig.16 and Fig.17 The relevant parameters of the first pipe section 11 are expressed in letters as follows: length L3, wall thickness t3, outer wall width B3, outer wall height H3, inner wall width b3, inner wall height h3 and haunch size s3; and the above parameters satisfy: B1 = B 21 , H1=H 21 , b1=b 21 , h1=h 21 , B 22 =B3,H 22 =H3,b 22 =b3,h 22 =h3.

[0070] Example 1

[0071] This embodiment is a pipe gallery A, and the standard cross-sectional dimensions of the pipe gallery A are as follows: the outer wall width is 4.5m, the outer wall height is 3.6m, the inner wall width is 3.8m, the inner wall height is 2.9m, the armhole dimension is 0.2m, and the design service life of the pipe gallery is T=100 years.

[0072] During the construction of the tunnel A, it is necessary to cross the ground fissure X. The impact range of the ground fissure is 15m on both sides of the ground fissure. The vertical activity rate between the upper and lower walls is V. v is 10 mm / year, and the horizontal activity rate V h3mm / year. According to the engineering experience and the importance of the project, the vertical deformation correction coefficient is is 1.2, the horizontal deformation correction factor The dimensions of each pipe section in pipe gallery A are designed as follows:

[0073] (1) The design dimensions of the first pipe section are as follows:

[0074] According to the project requirements, the length L3 of the first pipe section is 3.60m; the cross-sectional dimensions of the first pipe section are the same as those of the pipe gallery A: the outer wall width B3 is 4.50m, the outer wall height H3 is 3.60m, the inner wall width b3 is 3.80m, and the inner wall height h3 is 2.90m; the wall thickness t3 of the first pipe section is (B3-b3) / 2 is (H3-h3) / 2 is 0.35m, and the armpit dimension s3 of the first pipe section is 0.20m.

[0075] (2) The design dimensions of the second pipe section are as follows:

[0076] According to the value of the impact range of the ground fissure, the length L1 of the second pipe section is 30.00m, the wall thickness t1 of the second pipe section is 0.50m, and the armpit dimension s1 is 0.30m.

[0077] Calculate the horizontal deformation reserved width d h :

[0078]

[0079] Calculate the vertical deformation reserve width d v :

[0080]

[0081] Calculate the inner wall width and inner wall height of the second pipe section as follows:

[0082] b1=b3+2×d h =3.80+2×0.36=4.52m; h1=h3+2×d v =2.90+2×1.20=5.30m.

[0083] Calculate the outer wall width and outer wall height of the second pipe segment as:

[0084] B1=b1+2×t1=4.52+2×0.5=5.52m; H1=h1+2×t1=5.3+2×0.5=6.30m.

[0085] (3) The design dimensions of the connecting pipe joint are as follows:

[0086] The length L2 of the connecting pipe section is 4.10m, the wall thickness t2 is 0.46m, the haunch dimension s2 is 0.3m, and the outer wall width B of the second end is 21 = B1 = 5.40m, the outer wall height H at the second end 21 = H1 = 6.30m, the inner wall width b at the second end 21 = b1 = 4.40 m, the inner wall height of the second end h 21 = h1 = 5.30 m, the outer wall width B at the first end 22 = B3 = 4.50m, the outer wall height H at the first end 22 =H3=3.60m, the inner wall width b at the first end 22 = b3 = 3.80 m, the inner wall height of the first end h 22 =h3=2.90m, the angle θ between the pipe wall and the horizontal direction is 30°.

[0087] Example 2

[0088] This embodiment is the pipe gallery B, and the standard cross-sectional dimensions of the pipe gallery B are as follows: the outer wall width is 4.20m, the outer wall height is 3.20m, the inner wall width is 3.60m, the inner wall height is 2.60m, the armhole dimension is 0.20m, and the design service life of the pipe gallery is T=100 years.

[0089] During the construction of the tunnel B, it is necessary to cross the ground fissure Y. The impact range of the ground fissure is 20m on both sides of the ground fissure. The vertical activity rate between the upper and lower walls is V. v is 25 mm / year, and the horizontal activity rate V h 10mm / year. According to the engineering experience and the importance of the project, the vertical deformation correction coefficient is is 0.8, the horizontal deformation correction coefficient The size of each pipe section in pipe gallery B is designed as follows:

[0090] (1) The design dimensions of the first pipe section are as follows:

[0091] According to the project requirements, the length L3 of the first pipe section is 5.00m, and the cross-sectional dimensions of the first pipe section are the same as those of the pipe gallery B: the outer wall width B3 is 4.20m, the outer wall height H3 is 3.20m, the inner wall width b3 is 3.60m, the inner wall height h3 is 2.60m, the wall thickness t3 of the first pipe section is (B3-b3) / 2 is (H3-h3) / 2 is 0.30m, and the added arm size s3 of the first pipe section is 0.20m.

[0092] (2) The design dimensions of the second pipe section are as follows:

[0093] According to the value of the impact range of the ground fissure, the length L1 of the second pipe section is 40.00m, the wall thickness t1 of the second pipe section is 0.60m, and the armpit dimension s1 is 0.60m.

[0094] Calculate the horizontal deformation reserved width d h :

[0095]

[0096] Calculate the vertical deformation reserve width d v :

[0097]

[0098] Calculate the inner wall width and inner wall height of the second pipe section as follows:

[0099] b1=b3+2×d h =3.60+2×1.10=5.80m; h1=h3+2×d v =2.60+2×2.00=6.60m.

[0100] Calculate the outer wall width and outer wall height of the second pipe segment as:

[0101] B1=b1+2×t1=5.80+2×0.60=7.00m; H1=h1+2×t1=6.60+2×0.60=7.80m.

[0102] (3) The design dimensions of the connecting pipe joint are as follows:

[0103] The length L2 of the connecting pipe section is 7.50m, the wall thickness t2 is 0.46m, the haunch dimension s2 is 0.5m, and the outer wall width B of the second end is 21 = B1 = 7.00m, the outer wall height H at the second end 21 = H1 = 8.20m, the inner wall width b at the second end 21 = b1 = 5.80 m, the inner wall height of the second end h 21 = h1 = 7.00 m, the outer wall width B at the first end 22 = B3 = 4.20m, the outer wall height H at the first end 22 =H3=3.20m, the inner wall width b at the first end 22 = b3 = 3.60 m, the inner wall height of the first end h 22 =h3=2.60m, the angle θ between the pipe wall and the horizontal direction is 20°.

[0104] Example 3

[0105] This embodiment is the pipe gallery C, and the standard cross-sectional dimensions of the pipe gallery C are as follows: the outer wall width is designed to be 4.80m, the outer wall height is 3.90m, the inner wall width is 4.00m, the inner wall height is 3.10m, the armhole dimension is 0.30m, and the designed service life of the pipe gallery is T=100 years.

[0106] During the construction of the pipeline corridor C, it is necessary to cross the ground fissure Z. The impact range of the ground fissure is 18m on both sides of the ground fissure. The vertical activity rate between the upper and lower walls is V v is 7 mm / year, and the horizontal activity rate V h 5mm / year. According to the engineering experience and the importance of the project, the vertical deformation correction coefficient is is 1.1, the horizontal deformation correction factor The size of each pipe section in pipe gallery C is designed as follows:

[0107] (1) The design dimensions of the first pipe section are as follows:

[0108] According to the project requirements, the length L3 of the first pipe section is 4.80m, and the cross-sectional dimensions of the first pipe section are the same as those of the pipe gallery C: the outer wall width B3 is 4.80m, the outer wall height H3 is 3.90m, the inner wall width b3 is 4.00m, the inner wall height h3 is 3.10m, the wall thickness t3 of the first pipe section is (B3-b3) / 2 is (H3-h3) / 2 is 0.40m, and the armpit dimension s3 of the first pipe section is 0.30m.

[0109] (2) The design dimensions of the second pipe section are as follows:

[0110] According to the value of the impact range of the ground fissure, the length L1 of the second pipe section is 36.00m, the wall thickness t1 of the second pipe section is 0.50m, and the armpit dimension s1 is 0.40m.

[0111] Calculate the horizontal deformation reserved width d h :

[0112]

[0113] Calculate the vertical deformation reserve width d v :

[0114]

[0115] Calculate the inner wall width and inner wall height of the second pipe section as follows:

[0116] b1=b3+2×d h =4.00+2×0.40=4.80m; h1=h3+2×d v =3.10+2×0.77=4.70m.

[0117] Calculate the outer wall width and outer wall height of the second pipe segment as:

[0118] B1=b1+2×t1=4.80+2×0.50=5.80m; H1=h1+2×t1=4.70+2×0.50=5.70mm.

[0119] (3) The design dimensions of the connecting pipe joint are as follows:

[0120] The length L2 of the connecting pipe section is 5.00m, the wall thickness t2 is 0.46m, the haunch dimension s2 is 0.3m, and the outer wall width B of the second end is 21 = B1 = 5.90m, the outer wall height H at the second end 21 = H1 = 5.70m, the inner wall width b at the second end 21 = b1 = 4.90 m, the inner wall height of the second end h 21 = h1 = 4.70m, the outer wall width B at the first end 22 = B3 = 4.80m, the outer wall height H at the first end 22 =H3=3.90m, the inner wall width b at the first end 22 = b3 = 4.00 m, the inner wall height of the first end h 22 =h3=4.00m, the angle θ between the pipe wall and the horizontal direction is 15°.

[0121] During the implementation process, the above-mentioned embodiments 1 to 3 better estimate the deformation of the ground fissures within the design service life of the pipeline corridor, and take it into consideration when designing the cross-section of the second pipe segment 12 in the integrated pipeline corridor, which greatly reduces the adverse effects of the deformation of the pipeline corridor caused by the activity of ground fissures within the design service life of the integrated pipeline corridor on its internal pipelines; and the pipe diameter of the connecting pipe segment 13 gradually increases from the first end to the second end, realizing a smooth transition from the cross-sectional size and cross-sectional shear stiffness of the pipeline corridor, and better improving the stress state of the pipe segments and flexible joints of the integrated pipeline corridor under the activity of ground fissures.

[0122] In order to compare the mechanical properties of the integrated pipe gallery of the present invention with those of the traditional concrete pipe gallery, the integrated pipe gallery of the present invention (such as Fig.18 The geometric model of the traditional concrete pipe gallery (as shown in Fig.19 As shown), the model is simplified (the stress form of the pipe gallery is simplified), and its simulation parameters are: the length of the glass fiber reinforced polyurethane composite material used in the pipe segment of the integrated pipe gallery of the present invention is 25 mm, the mass content of the glass fiber reinforced polyurethane composite material is 10%, and the density of the glass fiber reinforced polyurethane composite material is about 525 kg / m 3 The elastic modulus of glass fiber reinforced polyurethane composite material is about 511.4Mpa; the density of concrete used in the concrete corridor is 2500kg / m3 , the elastic modulus of concrete is 30000Mpa. Under the influence of the same ground fissure activity, the mechanical properties of the integrated pipe gallery of the present invention and the traditional concrete pipe gallery are analyzed respectively, as follows:

[0123] Fig. 20 and Fig.21 They are the stress distribution diagram of the traditional concrete pipe gallery along the axial direction (Y direction) and the shear stress distribution diagram along the Z direction. It can be seen from the figure that under the influence of ground fissure activity, the axial (Y direction) stress of the traditional concrete pipe gallery is mainly concentrated between -500MPa and 500MPa, and the shear stress along the Z direction of the pipe gallery is mainly between 0MPa and 120MPa.

[0124] Fig. 22 and Fig.23 They are respectively the stress distribution diagram of the integrated pipe gallery of the present invention along the axial direction (Y direction) and the shear stress distribution diagram along the Z direction. It can be seen from the figure that under the influence of ground fissure activity, the axial (Y direction) stress of the integrated pipe gallery of the present invention is mainly concentrated between -15MPa and 15MPa, and the shear stress along the Z direction of the pipe gallery is mainly between 0MPa and 3MPa.

[0125] According to the above numerical simulation results, compared with the traditional concrete pipe gallery, under the influence of ground fissure activity, the stress of the integrated pipe gallery of the present invention is significantly lower than that of the traditional concrete pipe gallery, and its stress range is lower than the strength allowable value of glass fiber reinforced polyurethane composite material -40MPa to 30.5MPa. Therefore, the integrated pipe gallery of the present invention can adapt to large deformation caused by ground fissure activity without cracking and damage.

[0126] An embodiment of the present invention also provides a construction method for the urban underground comprehensive pipe gallery in the above embodiment, comprising the following steps:

[0127] A connecting pipe section, a second pipe section, another connecting pipe section and another first pipe section are installed in sequence at one end of a first pipe section in a hoisting manner, and two adjacent pipe sections are fixedly connected by a flexible pipe gallery joint.

[0128] The construction method of the urban underground comprehensive pipe gallery provided by the present invention comprises the following steps: when crossing a ground fissure, a connecting pipe segment, a second pipe segment, another connecting pipe segment and another first pipe segment are sequentially installed at one end of a first pipe segment on one side of the ground fissure in a hoisting manner, and two adjacent pipe segments are fixedly connected by a flexible pipe gallery joint, wherein the second pipe segment is arranged at the ground fissure. Since the second pipe segment and the first pipe segment have the same shape and the cross-sectional area of ​​the second pipe segment is larger than the cross-sectional area of ​​the first pipe segment, that is, the area of ​​the second pipe segment is larger, the shear resistance is improved, and the second pipe segment can withstand a larger shear force caused by the ground fissure, thereby reducing the breaking or deformation of the pipe segments of the urban underground comprehensive pipe gallery; and even if the ground fissure causes the deformation of the second pipe segment, since the reserved gap between the second pipe segment and the pipeline wall therein is larger, the second pipe segment has a larger deformation space, so that the deformed second pipe segment will not have a significant impact on the normal use of the pipeline inside the pipe gallery.

[0129] Further, for some urban underground comprehensive pipe corridors, the cross-section of the first pipe section, the cross-section of the second pipe section, the cross-section of the connecting pipe section and the flexible pipe corridor joint are all rectangular with corners and haunches, and the flexible pipe corridor joint includes a flexible joint body, which is formed by splicing four right-angle pipe corridor joint sections and multiple strip pipe corridor joint sections. Fig.24 The connection between the two adjacent pipe sections through the flexible pipe gallery joint specifically includes:

[0130] Step S101: Install four right-angle pipe gallery joint sections in a flexible pipe gallery joint on the four corners of a pipe segment.

[0131] Step S102: One or more strip-shaped pipe gallery joint sections are sealed and installed between two adjacent right-angle pipe gallery joint sections.

[0132] Step S103: fixedly connecting another pipe segment to the flexible pipe gallery joint.

[0133] Further, for some urban underground comprehensive pipe corridors, the flexible pipe corridor joints include a flexible joint body, a built-in mounting plate, a plurality of fasteners and an external mounting plate, wherein the built-in mounting plates are respectively located in the flexible joint body, one end of the plurality of fasteners are connected to the built-in mounting plates, the other ends of the plurality of fasteners pass through the inner wall of the flexible joint body and are located on the outside of the flexible joint body, a plurality of mounting holes matching the fasteners are opened on the external mounting plate, the fasteners are built-in bolts, and at least two grooves are provided on the flexible joint body, and the grooves can be sealed and clamped with the ends of the pipe sections, refer to Fig.25 The connection between the two adjacent pipe sections through the flexible pipe gallery joint specifically includes:

[0134] Step S201: inserting one pipe section into a groove of the flexible joint body, and inserting another pipe section into another groove of the flexible joint body;

[0135] Step S202: placing an external mounting plate on the inner side of the flexible joint body, and a plurality of fasteners in the flexible pipe gallery joint pass through a plurality of mounting holes respectively to connect with the external mounting plate, and the two pipe sections are compressed by the cooperation of nuts and fasteners.

[0136] Further, after the external mounting plate is placed on the inner side of the flexible joint body, a plurality of fasteners in the flexible pipe gallery joint respectively pass through a plurality of mounting holes to connect with the external mounting plate, and the two pipe sections are compressed by the cooperation of nuts and fasteners, the method further includes:

[0137] Step S203: bonding each external mounting plate to the contact surface of the flexible joint body.

[0138] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0139] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An urban underground comprehensive pipe gallery, characterized in that: The invention comprises a plurality of pipe sections, wherein the plurality of pipe sections comprises: Multiple first tube segments; at least one second pipe section, wherein the second pipe section has the same shape as the first pipe section, and the cross-sectional area of ​​the second pipe section is greater than the cross-sectional area of ​​the first pipe section; at least two connecting pipe sections, the connecting pipe sections connecting the second pipe section with the first pipe section; A plurality of flexible pipe gallery joints, wherein the flexible pipe gallery joints are used for sealingly connecting two adjacent pipe sections; The cross section of the pipe section is a rectangle with corners and arms; the inner wall height h1 of the second pipe section satisfies: h1 = h3 + 2 × d v , d v =V v ×T×φ v ; Wherein, h3 is the inner wall height of the first pipe section, d v The reserved width for the vertical deformation of the pipe gallery, V v is the vertical activity rate between the upper and lower walls of the ground fissure, T is the design service life of the pipeline corridor, φ v It is the correction coefficient of the vertical deformation of the corridor, and its value range is 0.8-1.

2.

2. The urban underground comprehensive pipe gallery according to claim 1 is characterized in that: The first pipe section, the second pipe section and the connecting pipe section are all made of glass fiber reinforced polyurethane composite materials.

3. The urban underground comprehensive pipe gallery according to claim 1 is characterized in that: The inner wall width b1 of the second pipe section satisfies: b1=b3+2×d h , d h =V h ×T×φ h ; Wherein, b3 is the inner wall width of the first pipe section, d h Reserve width for horizontal deformation of the pipe gallery, V h is the horizontal activity rate between the upper and lower walls of the ground fissure, T is the design service life of the pipeline gallery, φ h It is the correction coefficient of the horizontal deformation of the corridor, and its value range is 0.8-1.

2.

4. The urban underground comprehensive pipe gallery according to claim 1, characterized in that: The first end of the connecting pipe segment is connected to the first pipe segment, and the second end of the connecting pipe segment is connected to the second pipe segment. The outer diameter of the connecting pipe segment gradually increases from the first end to the second end, and the angle between the pipe wall of the connecting pipe segment and the horizontal direction ranges from 15° to 30°.

5. A construction method for the urban underground comprehensive pipe gallery as claimed in claim 1, characterized in that: The following steps are involved: A connecting pipe section, a second pipe section, another connecting pipe section and another first pipe section are installed in sequence at one end of a first pipe section in a hoisting manner, and two adjacent pipe sections are fixedly connected by a flexible pipe gallery joint.

6. The construction method of the urban underground comprehensive pipe gallery according to claim 5 is characterized in that: The cross-section of the first pipe section, the cross-section of the second pipe section, the cross-section of the connecting pipe section and the flexible pipe gallery joint are all rectangular with corners and haunches. The flexible pipe gallery joint includes a flexible joint body, which is formed by splicing four right-angle pipe gallery joint sections and a plurality of strip-shaped pipe gallery joint sections. The connection between the two adjacent pipe sections through the flexible pipe gallery joint specifically includes: Install four right-angle pipe gallery joint sections in one of the flexible pipe gallery joints on the four corners of one of the pipe sections; One or more strip-shaped pipe gallery joint sections are sealed and installed between two adjacent right-angle pipe gallery joint sections; Connect another pipe section to the flexible pipe gallery joint.

7. The construction method of the urban underground comprehensive pipe gallery according to claim 5 is characterized in that: The flexible pipe gallery joint comprises a flexible joint body, an internal mounting plate, a plurality of fasteners and an external mounting plate, wherein the internal mounting plates are respectively located in the flexible joint body, one end of the plurality of fasteners are connected to the internal mounting plates, the other ends of the plurality of fasteners pass through the inner wall of the flexible joint body and are located on the outside of the flexible joint body, a plurality of mounting holes matching the fasteners are provided on the external mounting plate, the fasteners are internal bolts, and at least two grooves are provided on the flexible joint body, which can be sealed and clamped with the ends of the pipe sections; the connection between the two adjacent pipe sections through the flexible pipe gallery joint specifically comprises: Insert one of the pipe sections into a groove of the flexible joint body, and insert another pipe section into another groove of the flexible joint body; The external mounting plate is placed on the inner side of the flexible joint body, and the multiple fasteners in the flexible pipe gallery joint respectively pass through the multiple mounting holes and are connected to the external mounting plate, and the two pipe sections are compressed by the cooperation of nuts and fasteners.

8. The construction method of the urban underground comprehensive pipe gallery according to claim 7 is characterized in that: After placing the external mounting plate on the inner side of the flexible joint body, a plurality of fasteners in the flexible pipe gallery joint respectively pass through a plurality of mounting holes correspondingly to be connected to the external mounting plate, and the two pipe sections are compressed by the cooperation of nuts and fasteners, the method further includes: Each of the external mounting plates is bonded to a contact surface of the flexible joint body.

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