A passage footbridge for crossing underground pipelines in shallow-buried sections and its construction method

Abstract

The present invention discloses a passage bridge for crossing shallow-buried underground pipelines and a construction method thereof. The bridge includes a first concrete spread foundation provided on one side of the underground pipeline, a second concrete spread foundation provided on the other side of the underground pipeline, thick checker plates, and a number of I-beam members; each I-beam member is erected and fixed between the first concrete spread foundation and the second concrete spread foundation through one of its flanges and spans across the underground pipeline; the thick checker plates are laid and fixed on the other flanges of the respective I-beam members. In the present invention, the load generated by mechanical equipment walking on the thick checker plates is transmitted to the first concrete spread foundation and the second concrete spread foundation on both sides of the pipeline through the I-beam members, and then the load is diffused to the surrounding through the foundation by the first concrete spread foundation and the second concrete spread foundation, achieving the effect of step-by-step load transfer and stress diffusion, weakening the acting force directly on the pipeline, and achieving the purpose of protecting the underground pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic safety, and in particular to a passing bridge for crossing shallow-buried underground pipelines and a construction method thereof. Background Art

[0002] At present, the pipelines buried shallowly underground generally include natural gas pipelines or Sinopec pipelines. Since there is pressure in the natural gas pipelines or Sinopec pipelines, when heavy construction machinery (such as rotary drilling rigs, truck cranes, and mixers) passes over the roads above the natural gas pipelines or Sinopec pipelines buried shallowly underground, the load will be transmitted to the vicinity of the pipelines through the soil, causing alternating circumferential stress changes in the pipelines. Such stress changes will gradually cause local permanent cumulative damage in one or several places of the pipelines, leading to major safety hazards such as pipeline breakage and leakage. Therefore, when there are many problems in the existing bridge construction process, such as the existence of underground pipelines in the construction area and the inability to relocate them, in order to ensure the safety of the pipelines and the passing during the construction process, corresponding protective measures are usually taken. However, the traditional protective measures generally adopt the method of laying a certain thickness of diamond plate after C20 concrete hardening treatment above the pipelines. This method diffuses the load above the pipelines through the large contact area between the steel plate and the ground, so as to achieve the purpose of reducing the stress on the pipelines. Although this method can reduce the stress on the pipelines to a certain extent, it has the following defects:

[0003] 1. The concrete hardening treatment will cause a certain degree of waste, and the hardened concrete cannot be reused.

[0004] 2. The stiffness of the steel plate is limited. When heavy construction machinery passes, the steel plate will be deflected under pressure, so that most of the load directly acts on the foundation, and the effect of diffusing the load is small, which is not applicable to the shallow-buried section.

[0005] 3. The laid steel plate cannot be fixed well, and it is easy to slide during the walking process of heavy construction machinery, and continuous adjustment is required. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, one of the purposes of the present invention is to provide a passing bridge for crossing shallow-buried underground pipelines, which can achieve a large effect of diffusing the load through step-by-step load transfer and stress diffusion, weaken the acting force directly acting on the underground pipelines, avoid most of the load directly acting on the pipelines, and is applicable to the bridge construction project of shallow-buried underground pipelines; at the same time, it can avoid waste of resources.

[0007] The second object of the present invention is to provide a construction method for a passage bridge used to cross the underground pipelines in the shallow-buried section, which can greatly shorten the construction period, avoid the waste of concrete resources, reduce the production cost, and can well protect the pipelines buried underground when there are problems such as the existence of underground pipelines in the construction area that cannot be relocated during the construction process; at the same time, it can be widely applied to traffic engineering and municipal water conservancy projects.

[0008] The first object of the present invention is achieved by the following technical solutions:

[0009] A passage bridge used to cross the underground pipelines in the shallow-buried section includes:

[0010] A first concrete spread foundation, which is arranged on one side of the underground pipeline;

[0011] A second concrete spread foundation, which is arranged on the other side of the underground pipeline;

[0012] A number of I-beam members, and each I-beam member is erected and fixed between the first concrete spread foundation and the second concrete spread foundation through one of its flanges and spans across the underground pipeline;

[0013] Thick checkered steel plates, which are laid and fixed on the other flanges of each I-beam member.

[0014] Furthermore, the passage bridge used to cross the underground pipelines in the shallow-buried section of the present invention further includes a first steel part, and the first steel part is pre-buried on the first concrete spread foundation for welding with the flanges of each I-beam member erected on the first concrete spread foundation.

[0015] Furthermore, the first steel part has a first connection surface and two first pre-buried parts, the two first pre-buried parts are connected through the first connection surface, the two first pre-buried parts are pre-buried on the first concrete spread foundation, and the first connection surface is located above the first concrete spread foundation and welded with the I-beam member.

[0016] Furthermore, the first connection surface fits with the top surface of the first concrete spread foundation.

[0017] Furthermore, the passage bridge used to cross the underground pipelines in the shallow-buried section of the present invention further includes a second steel part, and the second steel part is pre-buried on the second concrete spread foundation for welding with the flanges of each I-beam member erected on the second concrete spread foundation.

[0018] Further, the second steel member has a second connection surface and two second embedded parts. The two second embedded parts are connected by the second connection surface, and the two second embedded parts are embedded in the second concrete enlarged foundation. The second connection surface is located above the second concrete enlarged foundation and welded to the I-beam member.

[0019] Further, the second connection surface is in contact with the top surface of the second concrete enlarged foundation.

[0020] Further, the thick pattern steel plate is welded to the I-beam member.

[0021] Further, two adjacent I-beam members are close to each other.

[0022] The second object of the present invention is achieved by the following technical solution:

[0023] A construction method for a passage bridge for crossing shallow-buried underground pipelines includes the following steps:

[0024] S1. Site investigation and plan determination

[0025] According to the actual position of the underground pipelines on site, the bearing capacity of the on-site foundation, the width of the traffic lane, and the passing capacity of the bridge, determine the size of the concrete enlarged foundation, the number of I-beam members, and the thickness of the thick pattern steel plate, and design a bridge structure that meets the requirements;

[0026] S2. Setting of the concrete enlarged foundation

[0027] According to the sizes of the first concrete enlarged foundation and the second concrete enlarged foundation determined in the design plan, use an excavator to excavate a first foundation pit with a determined size and depth at the position of the first concrete enlarged foundation on site, and a second foundation pit with a determined size and depth at the position of the second concrete enlarged foundation on site. Pour C20 concrete in the first foundation pit to form the first concrete enlarged foundation, and pour C20 concrete in the second foundation pit to form the second concrete enlarged foundation;

[0028] S3. Setting of the I-beam members

[0029] Embed the first steel member before the first concrete enlarged foundation begins to set, and embed the second steel member before the second concrete enlarged foundation begins to set. At the same time, do a good job in covering and sprinkling water for curing the first concrete enlarged foundation and the second concrete enlarged foundation. When the setting strength of the first concrete enlarged foundation and the second concrete enlarged foundation reaches 80% or more of the design strength, place the I-beam members in sequence according to the design form, and fix the contact parts between the two ends of the I-beam members and the first steel member and the second steel member by welding;

[0030] S4. Laying the thick pattern steel plate

[0031] After the installation of the I-beam member, thick checkered steel plates are laid on the I-beam member, and the contact part between the thick checkered steel plate and the I-beam member is fixed by welding to form a passage bridge spanning the underground pipeline;

[0032] S5. Backfilling

[0033] Use sandy soil to densely backfill the gaps generated by the excess excavation around the bridge.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1. The passage bridge for spanning the shallow-buried underground pipeline of the present invention forms a spanning system through the I-beam member and the thick checkered steel plate, and forms the main load-bearing system through the first concrete spread foundation, the second concrete spread foundation and the I-beam member. That is, the load generated by the mechanical equipment walking on the thick checkered steel plate is transmitted to the first concrete spread foundation and the second concrete spread foundation on both sides of the underground pipeline through the I-beam member for acceptance, and the first concrete spread foundation and the second concrete spread foundation then spread the load transmitted from the upper part to the surrounding through the foundation, thereby greatly weakening the acting force directly acting on the underground pipeline through the step-by-step load transmission and stress diffusion, avoiding most of the load directly acting on the underground pipeline, and being applicable to the bridge construction project of the underground pipeline in the shallow-buried section to achieve the purpose of protecting and preventing the underground pipeline.

[0036] 2. The concrete spread foundation adopted by the passage bridge for spanning the shallow-buried underground pipeline of the present invention can be reused, reducing material waste, having certain economy, and thus achieving the waste reduction of resources.

[0037] 3. In the construction process of the construction method of the passage bridge for spanning the shallow-buried underground pipeline of the present invention, since the concrete spread foundation can be reused, it reduces material waste, thereby avoiding the extravagance and waste of concrete resources, reducing the production cost, avoiding a large amount of projects for the hardening treatment of C20 concrete, and thus being able to greatly shorten the construction period; and during the construction process, when there are problems such as the existence of underground pipelines in the construction area that cannot be relocated, it can well protect the pipelines buried underground; at the same time, it can be widely applied to traffic engineering and municipal water conservancy projects. Brief Description of the Drawings

[0038] Figure 1 It is a structural schematic diagram of the passage bridge for spanning the shallow-buried underground pipeline of the present invention;

[0039] Figure 2 It is an elevation schematic diagram of the passage bridge for spanning the shallow-buried underground pipeline of the present invention;

[0040] Figure 3Schematic diagram of the application of the access bridge for crossing buried underground pipelines in the present invention on a road;

[0041] Figure 4 Schematic diagram of the structure of the I-beam member according to an embodiment of the present invention;

[0042] Figure 5 Schematic cross-sectional structure diagram of the first steel member according to an embodiment of the present invention;

[0043] Figure 6 Schematic cross-sectional structure diagram of the second steel member according to an embodiment of the present invention;

[0044] Figure 7 Schematic flow chart of the construction method of the access bridge for crossing buried underground pipelines in the present invention.

[0045] In the figure: 10, the first concrete enlarged foundation; 101, pipeline; 102, the first steel member; 1021, the first embedded part; 1022, the first connection surface; 20, the second concrete enlarged foundation; 201, the second steel member; 2011, the second embedded part; 2012, the second connection surface; 30, I-beam member; 301, wing plate; 40, thick pattern steel plate. Specific embodiments

[0046] Next, in combination with the drawings and specific embodiments, the present invention will be preferentially described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] Embodiment:

[0050] Please refer to Figures 1-6 , the present invention shows a passage bridge for crossing underground pipelines in a shallow-buried section, including a first concrete spread foundation 10, a second concrete spread foundation 20, a thick checkered steel plate 40 and a number of I-beam members 30. The first concrete spread foundation 10 is arranged on one side of the underground pipeline 101, and the second concrete spread foundation 20 is arranged on the other side of the underground pipeline 101; each I-beam member 30 is erected and fixed between the first concrete spread foundation 10 and the second concrete spread foundation 20 through one of its flanges 301 and spans across the underground pipeline 101; the thick checkered steel plate 40 is laid and fixed on the other flange 301 of each I-beam member 30. It can be seen that the bridge of the present invention forms a crossing system through the I-beam members 30 and the thick checkered steel plate 40, and forms a main load-bearing system through the first concrete spread foundation 10, the second concrete spread foundation 20 and the I-beam members 30, that is, the load generated by the mechanical equipment walking on the thick checkered steel plate 40 is transmitted to the first concrete spread foundation 10 and the second concrete spread foundation 20 on both sides of the underground pipeline 101 through the I-beam members 30 for acceptance. The first concrete spread foundation 10 and the second concrete spread foundation 20 then diffuse the load transmitted from the upper part to the surroundings through the foundation, achieving the effect of gradually transmitting the load and diffusing the stress, greatly weakening the acting force directly acting on the underground pipeline 101, avoiding most of the load directly acting on the underground pipeline 101, and being applicable to the bridge construction project of the underground pipeline 101 in the shallow-buried section to achieve the purpose of protecting and safeguarding the underground pipeline 101.

[0051] As a preferred embodiment, the present invention may further include the following additional technical features: The access footbridge for crossing the shallow-buried underground pipeline 101 of the present invention further includes a first steel member 102 and a second steel member 201. The first steel member 102 is pre-embedded in the first concrete spread foundation 10 and is used to be welded to the wing plate 301 of each I-beam member 30 erected on the first concrete spread foundation 10, so as to fix the wing plate 301 of each I-beam member 30 erected on the first concrete spread foundation 10 to the first concrete spread foundation 10; The second steel member 201 is pre-embedded in the second concrete spread foundation 20 and is used to be welded to the wing plate of each I-beam member 30 erected on the second concrete spread foundation 20, so as to fix the wing plate of each I-beam member 30 erected on the second concrete spread foundation 20 to the second concrete spread foundation 20. It can be seen from this that the first steel member 102 is mainly used to be welded to the wing plate of each I-beam member 30 erected on the first concrete spread foundation 10, so as to fix the wing plate of each I-beam member 30 erected on the first concrete spread foundation 10 to the first concrete spread foundation 10; The second steel member 201 is mainly used to be welded to the wing plate of each I-beam member 30 erected on the second concrete spread foundation 20, so as to fix the wing plate of each I-beam member 30 erected on the second concrete spread foundation 20 to the second concrete spread foundation 20, thereby preventing the displacement of each I-beam member 30 when the vehicle travels on the thick pattern steel plate 40, and effectively preventing the relative movement of each component of the footbridge due to the repeated passage of mechanical equipment.

[0052] In this embodiment, the first steel member 102 has a first connection surface 1022 and two first embedded parts 1021. The two first embedded parts 1021 are connected through the first connection surface 1022. The two first embedded parts 1021 are pre-embedded in the first concrete spread foundation 10, and the first connection surface 1022 is located above the first concrete spread foundation 10 and is welded to each I-beam member 30. That is to say, it can be understood that the first steel member 102 is fixed to the first concrete spread foundation 10 by pre-embedding its first embedded parts 1021 in the first concrete spread foundation 10, thereby avoiding fixing the first steel member 102 to the first concrete spread foundation 10 by external components such as fasteners, achieving the efficiency of material saving, and at the same time facilitating the installation and fixation of the first steel member 102; Secondly, the first steel member 102 fixes the wing plate of each I-beam member 30 erected on the first concrete spread foundation 10 to the first concrete spread foundation 10 by welding its first connection surface 1022 to the wing plate erected on the first concrete spread foundation 10. In addition, by fitting the first connection surface 1022 to the top surface of the first concrete spread foundation 10, the top surface of the first concrete spread foundation 10 can support the first steel member 102, thereby improving the service life of the first steel member 102.

[0053] In this embodiment, the second steel member 201 has a second connection surface 2012 and two second embedded parts 2011. The two second embedded parts 2011 are connected through the second connection surface 2012. The two second embedded parts 2011 are embedded in the second concrete spread foundation 20. The second connection surface 2012 is located above the second concrete spread foundation 20 and welded to each I-beam member 30. That is to say, it can be understood that the second steel member 201 is fixed on the second concrete spread foundation 20 by embedding its second embedded parts 2011 in the second concrete spread foundation 20, thus avoiding fixing the second steel member 201 on the second concrete spread foundation 20 through external components such as fasteners, achieving the effect of saving materials, and at the same time facilitating the installation and fixation of the second steel member 201. Secondly, the second steel member 201 fixes the I-beam members 30 on the wing plate erected on the second concrete spread foundation 20 on the second concrete spread foundation 20 by welding its second connection surface 2012 to the wing plate erected on the second concrete spread foundation 20. In addition, the second connection surface 2012 is attached to the top end surface of the second concrete spread foundation 20, so that the top end surface of the second concrete spread foundation 20 can support the second steel member 201 and improve the service life of the second steel member 201.

[0054] In this embodiment, the thick pattern steel plate 40 is welded to the I-beam member 30, that is, it is welded and fixed to the I-beam member 30 at the four corner points and the midpoint of each side of the thick pattern steel plate 40, effectively preventing the vehicle from moving during the passage on the temporary bridge. In addition, two adjacent I-beam members 30 are closely adjacent to each other to further improve the bending strength of the I-beam members 30, thereby improving the bearing capacity of the temporary bridge of the present invention, so that the temporary bridge of the present invention can better meet the protection requirements during the construction of the underground pipeline 101.

[0055] It should be noted that the design dimensions of the first concrete spread foundation 10 and the second concrete spread foundation 20 are determined according to the width of the driving lane and the bearing capacity, and the reliability is relatively high. Of course, the number of I-beam members 30 is determined by the inventor according to factors such as the bearing capacity of the on-site foundation and the passing capacity of the temporary bridge, and is not limited here.

[0056] Please refer to Figure 7 , the present invention shows a construction method for a temporary bridge for crossing an underground pipeline in a shallow buried section, including the following steps:

[0057] S1. On-site investigation and determination of the plan

[0058] According to the actual position of the on-site underground pipeline, the bearing capacity of the on-site foundation, the width of the passing lane, and the passing capacity of the temporary bridge, determine the size of the concrete spread foundation, the number of I-beam members, and the thickness of the thick pattern steel plate, and design a temporary bridge structure that meets the requirements.

[0059] S2. Setting of the concrete spread foundation

[0060] According to the sizes of the first and second concrete spread foundations determined in the design plan, use an excavator to excavate the first foundation pit with determined size and depth at the location of the first concrete spread foundation on-site, and excavate the second foundation pit with determined size and depth at the location of the second concrete spread foundation on-site. Pour C20 concrete in the first foundation pit to form the first concrete spread foundation, and pour C20 concrete in the second foundation pit to form the second concrete spread foundation. That is to say, after determining the location of the underground pipeline, use an excavator to excavate the first foundation pit on one side of the underground pipeline according to the structural size of the first concrete spread foundation, and use an excavator to excavate the second foundation pit on the other side of the underground pipeline according to the structural size of the second concrete spread foundation; among them, the C20 concrete poured in the first foundation pit forms the first concrete spread foundation after solidification, and the C20 concrete poured in the second foundation pit forms the second concrete spread foundation after solidification.

[0061] S3. Setting of the I-beam members

[0062] Embed the first steel piece before the initial setting of the first concrete spread foundation, embed the second steel piece before the initial setting of the second concrete spread foundation, and at the same time do a good job in covering and sprinkling water for curing the first and second concrete spread foundations. When the solidification strength of the first and second concrete spread foundations reaches 80% or more of the design strength, place the I-beam members in sequence according to the design form, and at the same time fix the contact parts between the two ends of the I-beam members and the first and second steel pieces by welding.

[0063] Specifically, before the initial setting of the first concrete spread foundation, the first steel piece is embedded at the center line position on the top of the first concrete spread foundation. Before the initial setting of the second concrete spread foundation, the second steel piece is embedded at the center line position on the top of the second concrete spread foundation. It can be seen that the load borne by the first steel piece is transmitted from the middle position of the first concrete spread foundation to both sides, and the load borne by the second steel piece is transmitted from the middle position of the second concrete spread foundation to both sides, making the load-bearing capacity of the first and second concrete spread foundations better, and further improving the overall stiffness of the passing temporary bridge of the present invention.

[0064] S4. Laying thick diamond plates

[0065] After the installation of the I-beam members, lay thick diamond plates on the I-beam members, and fix the contact parts between the thick diamond plates and the I-beam members by welding to form a passing temporary bridge spanning the underground pipeline.

[0066] S5. Backfilling

[0067] Backfill and compact the voids generated by the excess excavation around the temporary bridge with sandy soil.

[0068] As can be seen from the above steps, in the construction process of the construction method of the temporary bridge for crossing the shallow-buried underground pipelines of the present invention, the concrete spread foundation adopted can be reused, reducing the waste of materials, thus avoiding the extravagance and waste of concrete resources, reducing the production cost, and avoiding a large amount of projects for the hardening treatment of C20 concrete, thereby greatly shortening the construction period; and in the construction process, when there are problems such as the existence of underground pipelines in the construction area that cannot be relocated, it can well protect the pipelines already buried underground; at the same time, it can be widely applied to traffic engineering and municipal water conservancy projects.

[0069] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A construction method for a passage bridge used to cross the underground pipelines in a shallow-buried section, characterized in that, It includes the following steps: S1. On-site investigation and determination of the plan According to the actual positions of the underground pipelines on-site, the bearing capacity of the on-site foundation, the width of the traffic lane, and the passing capacity of the temporary bridge, determine the size of the concrete spread foundation, the number of I-beam members, and the thickness of the thick checkered steel plate, and design a temporary bridge structure that meets the requirements; S2. Setting of the concrete spread foundation According to the sizes of the first concrete spread foundation and the second concrete spread foundation determined in the design plan, use an excavator to dig a first foundation pit with determined size and depth at the position of the first concrete spread foundation on-site, and a second foundation pit with determined size and depth at the position of the second concrete spread foundation on-site. Pour C20 concrete in the first foundation pit to form the first concrete spread foundation, and pour C20 concrete in the second foundation pit to form the second concrete spread foundation; S3. Setting of the I-beam members Embed a first steel part before the first concrete spread foundation begins to set. Among them, the first steel part has a first connection surface and two first embedded parts connected through the first connection surface. The two first embedded parts are embedded in the first concrete spread foundation so that the first connection surface is located above the first concrete spread foundation; Embed a second steel part before the second concrete spread foundation begins to set. Among them, the second steel part has a second connection surface and two second embedded parts connected through the second connection surface. The two second embedded parts are embedded in the second concrete spread foundation so that the second connection surface is located above the second concrete spread foundation; At the same time, do a good job in covering and sprinkling water for curing the first concrete spread foundation and the second concrete spread foundation. When the setting strength of the first concrete spread foundation and the second concrete spread foundation reaches 80% or more of the design strength, place the I-beam members in sequence according to the design form. At the same time, the two ends of the I-beam members are fixed to the first connection surface and the second connection surface respectively by welding; among them, the traffic direction is consistent with the length direction of the I-beam members; S4. Laying the thick checkered steel plate After the I-beam members are installed, lay the thick checkered steel plate on the I-beam members. The contact part between the thick checkered steel plate and the I-beam members is fixed by welding to form a temporary bridge for crossing the underground pipelines; S5. Backfilling Backfill the gaps generated by the excess excavation around the temporary bridge tightly with sandy soil; The temporary bridge for crossing the shallow-buried section of the underground pipelines formed by the construction method includes: A first concrete spread foundation, arranged on one side of the underground pipelines; A second concrete spread foundation, arranged on the other side of the underground pipelines; Several I-beam members, each I-beam member is erected and fixed between the first concrete spread foundation and the second concrete spread foundation through one of its flanges and crosses the underground pipelines; The thick checkered steel plate, laid and fixed on the other flange of each I-beam member.

2. The construction method of a passage footbridge for crossing buried underground pipelines in shallow buried sections as described in claim 1, characterized in that, Before the first concrete spread foundation begins to set, the first steel part is embedded at the top center line position of the first concrete spread foundation. Before the second concrete spread foundation begins to set, the second steel part is embedded at the top center line position of the second concrete spread foundation.

3. A passage footbridge for crossing underground pipelines in a shallow-buried section, formed by the construction method described in claim 1 or 2, characterized in that, The access bridge for crossing the underground pipelines in the shallow-buried section includes: The first concrete spread foundation, which is arranged on one side of the underground pipeline; The second concrete spread foundation, which is arranged on the other side of the underground pipeline; The first steel member, and the first steel member is embedded in the first concrete spread foundation; The second steel member, and the second steel member is embedded in the second concrete spread foundation; A plurality of I-beam members, and each I-beam member is erected between the first concrete spread foundation and the second concrete spread foundation through one of its flanges and spans across the underground pipeline; and the opposite ends of the flanges of each I-beam member are respectively welded to the first steel member and the second steel member; each I-beam member is arranged in a row, and the traffic direction is consistent with the length direction of the I-beam member; The thick chequered steel plate, which is laid and fixed on the other flange of each I-beam member.

4. The passage footbridge for crossing the underground pipelines in the shallow buried section according to claim 3, characterized in that, The first steel member has a first connection surface and two first embedded parts, and the two first embedded parts are connected by the first connection surface, and the two first embedded parts are embedded in the first concrete spread foundation, and the first connection surface is located above the first concrete spread foundation and is welded to the I-beam member.

5. The passage footbridge for shallow-buried underground pipelines as described in claim 4, characterized in that, The first connection surface is in contact with the top surface of the first concrete spread foundation.

6. The passage footbridge for crossing the shallow-buried section of underground pipelines as described in claim 3, characterized in that, The second steel member has a second connection surface and two second embedded parts, and the two second embedded parts are connected by the second connection surface, and the two second embedded parts are embedded in the second concrete spread foundation, and the second connection surface is located above the second concrete spread foundation and is welded to the I-beam member.

7. The passage footbridge for crossing the underground pipeline in the shallow buried section as described in claim 6, characterized in that, The second connection surface is in contact with the top surface of the second concrete spread foundation.

8. The passage footbridge for crossing the underground pipelines in the shallow buried section as described in claim 3, wherein The thick chequered steel plate is welded to the I-beam member.

9. A passage footbridge for crossing underground pipelines in a shallow buried section as described in claim 3, characterized in that Two adjacent I-beam members are closely adjacent to each other.

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