Construction method for main body structure of entrance and exit of subway station intruded by gantry track support

Abstract

The invention provides a construction method for a portal track support invading subway station entrance and exit main body structure, and relates to the field of building construction, the construction method comprises the following steps: excavating a station entrance and exit foundation pit in a shield area construction process; part of the multiple fender posts located below the top beam of the station foundation pit are dismantled, a to-be-reinforced area is formed in the dismantling position of each fender post, and supporting components are installed in at least part of the to-be-reinforced area in the multiple to-be-reinforced areas; after construction of all the supporting components is completed, the remaining fender posts in the multiple fender posts are dismantled; and the supporting component is poured in the station main body structure. The method can solve the problem that the construction of the station entrance and exit main body structure is affected by the reinforced concrete fender posts below the gantry crane track foundation crown beam during subway shield interval construction, ensures that the station entrance and exit main body structure and the shield interval can be constructed simultaneously, shortens the construction period, reduces the engineering cost, and performs acceptance inspection and transfer as soon as possible.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a construction method for a gantry track support intruding into a main structure of a subway station entrance and exit. Background Art

[0002] In traditional subway shield section construction, the station foundation pit crown beam is used as the gantry track foundation. The gantry crane is used to lift shield segments, shield debris and miscellaneous materials. Below the crown beam are the reinforced concrete retaining piles of the station main foundation pit. The construction of the station entrances and exits requires breaking down these retaining piles to connect the entrances and exits with the main structure of the station. In other words, in the traditional construction process, the station entrances and exits can only be constructed after the shield section is penetrated and the gantry crane is dismantled. Traditional construction methods will seriously restrict the construction period and affect the handover of the subway line. Summary of the invention

[0003] The purpose of the present invention is to provide a construction method for a gantry rail support invading the main structure of a subway station entrance and exit, which can improve the problem that the reinforced concrete retaining piles under the crown beam of the gantry crane rail foundation during the construction of the subway shield section affect the construction of the main structure of the station entrance and exit, ensure that the main structure of the station entrance and exit and the shield section can be constructed at the same time, shorten the construction period, reduce the project cost, and ensure early acceptance and handover.

[0004] The embodiment of the present invention is achieved as follows:

[0005] The present invention provides a construction method for a gantry rail support intruding into a main structure of a subway station entrance and exit, comprising the following steps:

[0006] Step S100, excavating a station entrance and exit foundation pit during the shield area construction;

[0007] Step S200, removing some of the plurality of retaining piles located below the crown beam of the station foundation pit, forming an area to be reinforced at each position where the retaining piles are removed, and installing support members in at least some of the plurality of areas to be reinforced;

[0008] Step S300: after the construction of all the supporting members is completed, the remaining retaining piles among the plurality of retaining piles are removed;

[0009] Step S400: casting the supporting member into the main structure of the station.

[0010] In an optional embodiment, in step S200, among the plurality of retaining piles, some of the retaining piles are removed by leaving one out of two.

[0011] Based on the above scheme, some retaining piles are dismantled reasonably and regularly, which is not only convenient for construction, but also convenient for ensuring that the remaining retaining piles and the added supporting components cooperate to play a better stabilizing role, improve the safety and reliability of construction, and reduce the accident rate.

[0012] In an optional embodiment, in step S200, when removing the retaining piles, the retaining piles are chiseled out to 90 mm-110 mm below the bottom slab cushion layer of the station entrance and exit.

[0013] Based on the above scheme, when dismantling the retaining piles, a pit is formed by chiseling off 90mm-110mm at the bottom of the retaining pile. When constructing the supporting member, the bottom of the supporting member can be inserted into the pit to improve the supporting stability of the supporting member, thereby improving the construction safety. The supporting member is positioned by the pit, which is conducive to the layout of the supporting member, improves the accuracy of the position of the supporting member, and improves the construction efficiency.

[0014] In an optional embodiment, in step S200, a first embedded fixing member is firstly arranged at the bottom of the area to be reinforced, and a second embedded fixing member is arranged at the top of the area to be reinforced, and then the supporting member is welded and fixed to the first embedded fixing member and the second embedded fixing member at the same time.

[0015] Based on the above solution, by providing the first embedded fixing member and the second embedded fixing member, the connection firmness of the supporting member can be improved and the construction safety can be improved.

[0016] In an optional embodiment, in step S200, the first embedded fixing part is fixed to the main reinforcement of the retaining pile by welding, and the second embedded fixing part is fixed to the main reinforcement of the station foundation pit crown beam by welding.

[0017] Based on the above solution, the connection method between the first embedded fixing member and the second embedded fixing member is simple and reliable, with low construction cost and high construction efficiency.

[0018] In an optional embodiment, in step S200, the supporting member includes a first lattice column, a supporting steel pipe, and a second lattice column, and the following steps are performed when constructing the first embedded fixings, the supporting member, and the second embedded fixings: installing the first embedded fixings, fixing the first lattice column to the first embedded fixings, fixing the supporting steel pipe to the first lattice column, then fixing the second lattice column to the supporting steel pipe, fixing the second lattice column to the second embedded fixings, and fixing the second embedded fixings.

[0019] Based on the above scheme, the support member, the first embedded fixing member and the second embedded fixing member are constructed from bottom to top, which is convenient for construction and can improve the stability and reliability of the overall structure. In addition, the support member is made of a combination of lattice columns and supporting steel pipes, and the overall structural strength is high. During the pouring process, it is conducive to combining with concrete to improve the structural strength.

[0020] In an optional embodiment, the first lattice column and the supporting steel pipe are fixedly connected via a flange structure; and the second lattice column and the supporting steel pipe are fixedly connected via a flange structure.

[0021] Based on the above scheme, the connection method of the first lattice column, the supporting steel pipe and the second lattice column is simple and reliable, the construction is flexible and convenient, the connection position is firm and not easy to loosen, and the overall structure is stable.

[0022] In an optional embodiment, the first lattice column or the second lattice column includes an alternating arrangement of annular steel and angle steel groups, the annular steel is welded to the angle steel group, the angle steel group includes a plurality of angle steel bodies arranged in an annular shape, and adjacent angle steel bodies have a spacing.

[0023] Based on the above solution, the structures of the first lattice column and the second lattice column are simple, which is conducive to construction, and the first lattice column and the second lattice column have high structural strength and good supporting stability.

[0024] In an optional embodiment, in step S200, a first gap is provided between the first lattice column and the first embedded fixing member, a second gap is provided between the second lattice column and the second embedded fixing member, and the first gap and the second gap are densely filled with grouting material.

[0025] Based on the above solution, the grouting material is used to fill the gap between the first lattice column and the crown beam, thereby improving the stability and reliability of the connection position between the first lattice column and the crown beam. Similarly, the grouting material is used to fill the gap between the second lattice column and the part of the retaining pile buried underground, thereby improving the stability and reliability of the connection position between the second lattice column and the retaining pile.

[0026] In an optional embodiment, in step S300, after the remaining retaining piles are removed, a plurality of the supporting members are connected to form a whole.

[0027] Based on the above solution, all supporting components are connected to form a whole, thereby improving the stability and reliability of the support. After pouring, the overall structure is more solid and reliable, meeting the construction requirements.

[0028] The beneficial effects of the embodiments of the present invention are:

[0029] In summary, the construction method of the gantry track support invading the main structure of the subway station entrance and exit provided in this embodiment can remove the reinforced concrete retaining piles under the crown beam of the gantry track foundation in advance during the construction of the station entrance and exit, and use support components to support instead of the retaining piles to bear the force, and after the support components are completed, remove the remaining retaining piles to ensure that the support components are used to support the stability between the bottom of the crown beam and the bottom plate of the station entrance and exit. When constructing the main structure of the station entrance and exit, the support components can be directly cast into the main structure of the station without affecting the stress of the main structure of the station. That is to say, in the prior art, when constructing the main structure of the station entrance and exit, the station entrance and exit construction can only be carried out after the shield section construction is completed and the retaining piles are removed. In this way, the shield section and the station entrance and exit must be constructed successively and cannot be carried out at the same time, resulting in a long construction period. In this embodiment, supporting components are used instead of retaining piles to support the force during the construction of the shield section, and the supporting components can be directly cast in the main structure of the station entrance and exit without the need for subsequent demolition. This ensures that the station entrance and exit are constructed simultaneously with the shield section. After the shield section is connected, the station entrance and exit can also be constructed, which can greatly shorten the construction period, reduce construction costs, and realize the early handover and operation of the subway line. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of a gantry rail support intruding into the main structure of a subway station entrance and exit according to an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the arrangement of multiple retaining piles according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the first lattice column or the second lattice column according to an embodiment of the present invention.

[0034] icon:

[0035] 100-retaining piles; 101-first retaining pile; 102-second retaining pile; 103-third retaining pile; 104-fourth retaining pile; 200-crown beam; 300-supporting member; 301-annular steel; 302-angle steel body; 310-first lattice column; 320-supporting steel pipe; 330-second lattice column; 400-station entrance and exit top plate; 500-station entrance and exit bottom plate; 600-first embedded fixings; 700-second embedded fixings; 800-gantry track foundation. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 or an electrical 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the prior art, when constructing a shield section and the main structure of a station entrance and exit, it is necessary to complete the construction of the shield section first, and then remove the retaining piles 100 supporting the station entrance and exit before constructing the main structure of the station entrance and exit. The reason is that the retaining piles 100 are reinforced concrete structures and cannot be directly cast together with the concrete of the main body of the station main entrance. They must be removed before the main structure of the station entrance and exit can be cast. This results in a long construction period and high construction costs.

[0043] In view of this, the designer provides a construction method for gantry rail supports invading the main structure of subway station entrances and exits, which can shorten the construction period and reduce construction costs.

[0044] Please combine Figure 1-Figure 3 In this embodiment, the construction method of the gantry rail support intruding into the main structure of the subway station entrance and exit includes the following steps:

[0045] Step S100, excavating a station entrance and exit foundation pit during the shield area construction;

[0046] Step S200, removing some of the plurality of retaining piles 100 located below the station foundation pit crown beam 200 and forming a to-be-reinforced area at the removed position of each retaining pile 100, and installing a support member 300 in at least some of the plurality of to-be-reinforced areas;

[0047] Step S300: after the construction of all the supporting members 300 is completed, the remaining retaining piles 100 among the plurality of retaining piles 100 are removed;

[0048] Step S400: Cast the supporting member 300 in the main structure of the station.

[0049] Based on the above, the working principle of the construction method of the gantry track support intruding into the main structure of the subway station entrance and exit provided in this embodiment is as follows:

[0050] During the construction of the station entrance and exit, the reinforced concrete retaining piles 100 below the crown beam 200 of the gantry track foundation 800 can be removed in advance, and the support members 300 can be used to support the retaining piles 100 instead of bearing the force. After the support members 300 are completed, the remaining retaining piles 100 are removed to ensure that the support members 300 are used to support the bottom of the crown beam 200 and the station entrance and exit floor 500. When constructing the main structure of the station entrance and exit, the support member 300 can be directly cast into the main structure of the station without affecting the stress of the main structure of the station. That is to say, in the prior art, when constructing the main structure of the station entrance and exit, the station entrance and exit construction can only be carried out after the shield section construction is completed and the retaining piles 100 are removed. In this way, the shield section and the station entrance and exit must be constructed successively and cannot be carried out at the same time, resulting in a long construction period. In this embodiment, during the construction of the shield section, the support member 300 is used instead of the retaining pile 100 to support the force, and the support member 300 can be directly cast in the main structure of the station entrance and exit, and there is no need to remove it later. This can ensure that the station entrance and exit and the shield section are constructed at the same time. After the shield section is connected, the station entrance and exit can also be completed. The construction period can be greatly shortened, the construction cost can be reduced, and the subway line can be handed over to operation as soon as possible.

[0051] The following embodiments illustrate the details of the construction method of the gantry rail support intruding into the main structure of the subway station entrance and exit provided in this application by way of examples.

[0052] In this embodiment, optionally, in step S200, a plurality of retaining piles 100 are distributed at corresponding positions of the station entrance and exit and arranged side by side, and among the plurality of retaining piles 100, some of the retaining piles 100 are removed in a manner of leaving one out of two. That is, in the preset direction, the first retaining pile 101 at the head end is retained, then the second retaining pile 102 and the third retaining pile 103 are removed in sequence based on the first retaining pile 101, the fourth retaining pile 104 is retained, and then the two retaining piles 100 adjacent to the fourth retaining pile 104 are removed based on the fourth retaining pile 104, and so on. During the demolition process, the position corresponding to each retaining pile 100 forms an area to be reinforced. It should be understood that the retaining pile 100 is inserted into a deeper position underground and extends below the cushion layer of the station entrance and exit floor 500. When the retaining pile 100 is chiseled out, not only the part of the retaining pile 100 that is exposed above the cushion layer of the station entrance and exit floor 500 is chiseled out, but also the part of the retaining pile 100 that extends at least 90mm-110mm below the cushion layer of the station entrance and exit floor 500 is chiseled out. In this way, the remaining part of the retaining pile 100 buried underground serves as a basic support, and a pit is formed at the chiseled position, which is conducive to positioning the support structure 300.

[0053] It should be noted that the method of chiseling out the retaining piles 100 in two-for-one manner and removing some of the retaining piles 100 in a reasonable and regular manner is not only convenient for construction, but also convenient for ensuring that the remaining retaining piles 100 cooperate with the added support members 300 to play a good stabilizing role, thereby improving the safety and reliability of construction and reducing the accident rate. When removing the retaining piles 100, a pit is formed by chiseling out 90mm-110mm from the bottom of the retaining pile 100. When constructing the support member 300, the bottom of the support member 300 can be inserted into the pit to improve the support stability of the support member 300, thereby improving the construction safety. The support member 300 is positioned by relying on the pit, which is conducive to the layout of the support member 300, improving the accuracy of the position of the support member 300, and improving the construction efficiency.

[0054] It should be understood that the retaining piles 100 can be chiseled to 90 mm, 100 mm or 110 mm below the cushion layer of the station entrance and exit floor 500.

[0055] In this embodiment, optionally, in step S200, a first embedded fixing member 600 is first set at the bottom of the area to be reinforced, and a second embedded fixing member 700 is set at the top of the area to be reinforced, and then the supporting member 300 is welded and fixed to the first embedded fixing member 600 and the second embedded fixing member 700 at the same time.

[0056] It should be noted that, by providing the first embedded fixing member 600 and the second embedded fixing member 700 , the connection firmness of the supporting member 300 can be improved, and the construction safety can be improved.

[0057] It should be understood that both the first embedded part and the second embedded part can be set as steel plates.

[0058] It should be noted that in step S200, the first embedded fixing member 600 is welded and fixed to the main reinforcement of the retaining pile 100, and the second embedded fixing member 700 is welded and fixed to the main reinforcement of the station foundation pit crown beam 200. In this way, the connection method of the first embedded fixing member 600 and the second embedded fixing member 700 is simple and reliable, with low construction cost and high construction efficiency.

[0059] In this embodiment, optionally, in step S200, the support member 300 includes a first lattice column 310, a support steel pipe 320, and a second lattice column 330. When constructing the first embedded fixture 600, the support member 300, and the second embedded fixture 700, the following steps are performed: installing the first embedded fixture 600, fixing and connecting the first lattice column 310 with the first embedded fixture 600, fixing and connecting the support steel pipe 320 with the first lattice column 310, then fixing and connecting the second lattice column 330 with the support steel pipe 320, fixing and connecting the second lattice column 330 with the second embedded fixture 700, and fixing the second embedded fixture 700. With such a design, the support member 300, the first embedded fixture 600, and the second embedded fixture 700 are constructed from bottom to top, which is convenient for construction and can improve the stability and reliability of the overall structure. Furthermore, the support member 300 is made of a combination of a lattice column and a support steel pipe 320, and the overall structural strength is high, which is conducive to combining with concrete during the pouring process to improve the structural strength. During construction, the support steel pipe 320 penetrates the station entrance top plate 400 and the station entrance bottom plate 500.

[0060] It should be understood that the first lattice column 310 is fixedly connected to the supporting steel pipe 320 through a flange structure; the second lattice column 330 is fixedly connected to the supporting steel pipe 320 through a flange structure. In this way, the connection method of the first lattice column 310, the supporting steel pipe 320 and the second lattice column 330 is simple and reliable, the construction is flexible and convenient, and the connection position is firm and not easy to loosen, and the overall structure is stable.

[0061] Optionally, the first lattice column 310 or the second lattice column 330 includes annular steels 301 and angle steel groups arranged alternately, the annular steels 301 are welded to the angle steel groups, the angle steel groups include a plurality of angle steel bodies 302 arranged in an annular shape, and there is a spacing between adjacent angle steel bodies 302. In this embodiment, the structures of the first lattice column 310 and the second lattice column 330 are arranged to be the same.

[0062] It should be noted that the first lattice column 310 and the second lattice column 330 have simple structures, which is convenient for construction, and the first lattice column 310 and the second lattice column 330 have high structural strength and good supporting stability.

[0063] In this embodiment, optionally, in step S200, a first gap is provided between the first lattice column 310 and the first embedded fixing member 600, and a second gap is provided between the second lattice column 330 and the second embedded fixing member 700, and the first gap and the second gap are densely filled with grouting material.

[0064] It should be understood that by filling the gap between the first lattice column 310 and the cap beam 200 with grouting material, the stability and reliability of the connection position between the first lattice column 310 and the cap beam 200 are improved. Similarly, by filling the gap between the second lattice column 330 and the part of the retaining pile 100 buried underground with grouting material, the stability and reliability of the connection position between the second lattice column 330 and the retaining pile 100 are improved.

[0065] It should be noted that the height of the first gap or the height of the second gap can be set to 15mm-25mm. In this embodiment, the height of the first gap or the height of the second gap is set to 20mm.

[0066] In this embodiment, optionally, in step S300, after the remaining retaining piles 100 are removed, multiple support members 300 are connected to form a whole, for example, multiple support members 300 can be connected to form a whole by channel steel. All support members 300 are connected to form a whole, thereby improving the stability and reliability of the support. After the pouring is completed, the overall structure is more solid and reliable, meeting the construction requirements.

[0067] It should be noted that, after the support of the plurality of support members 300 is completed, all the remaining retaining piles 100 are removed, and the depth of the chiseling is set as required. Furthermore, after the plurality of support members 300 are connected as a whole, concrete pouring can be performed.

[0068] The construction method of the gantry rail support invading the main structure of the subway station entrance and exit provided in this embodiment effectively improves the problem that the reinforced concrete retaining piles 100 under the gantry crane rail foundation crown beam 200 affect the construction of the main structure of the entrance and exit, ensures that the construction of the station entrance and exit does not interfere with the operation of the shield gantry crane, and the shield section is excavated normally, shortens the construction period, and reduces construction costs.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method for a gantry track support intruding into the main structure of a subway station entrance and exit, It is characterized in that The steps include: Step S100, excavating a station entrance and exit foundation pit during the shield area construction; Step S200, removing some of the plurality of retaining piles located below the crown beam of the station foundation pit, forming an area to be reinforced at each position where the retaining piles are removed, and installing support members in at least some of the plurality of areas to be reinforced; Step S300: after the construction of all the supporting members is completed, the remaining retaining piles among the plurality of retaining piles are removed; Step S400: casting the supporting member into the main structure of the station.

2. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 1, Features: In the step S200, among the plurality of retaining piles, some of the retaining piles are removed by leaving one out of two.

3. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 1, Features: In the step S200, when the retaining piles are removed, the retaining piles are chiseled out to 90 mm to 110 mm below the bottom slab cushion of the station entrance and exit.

4. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 1, Features: In the step S200, a first embedded fixing piece is firstly arranged at the bottom of the area to be reinforced, and a second embedded fixing piece is arranged at the top of the area to be reinforced, and then the supporting member is welded and fixed to the first embedded fixing piece and the second embedded fixing piece at the same time.

5. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 4, Features: In the step S200, the first embedded fixing part is fixed to the main reinforcement of the retaining pile by welding, and the second embedded fixing part is fixed to the main reinforcement of the crown beam of the station foundation pit by welding.

6. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 4, Features: In step S200, the supporting member includes a first lattice column, a supporting steel pipe, and a second lattice column. When constructing the first embedded fixing part, the supporting member, and the second embedded fixing part, the following installation steps are performed: installing the first embedded fixing part, fixing and connecting the first lattice column to the first embedded fixing part, fixing and connecting the supporting steel pipe to the first lattice column, then fixing and connecting the second lattice column to the supporting steel pipe, fixing and connecting the second lattice column to the second embedded fixing part, and fixing the second embedded fixing part.

7. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 6, Features: The first lattice column and the supporting steel pipe are fixedly connected via a flange structure; the second lattice column and the supporting steel pipe are fixedly connected via a flange structure.

8. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 6, Features: The first lattice column or the second lattice column comprises annular steel and angle steel groups arranged alternately, the annular steel is welded to the angle steel group, the angle steel group comprises a plurality of angle steel bodies arranged in an annular shape, and adjacent angle steel bodies have a spacing.

9. The construction method of the gantry track support intruding into the main structure of the subway station entrance and exit according to claim 6, Features: In the step S200, a first gap is provided between the first lattice column and the first embedded fixing member, and a second gap is provided between the second lattice column and the second embedded fixing member. The first gap and the second gap are densely filled with grouting material.

10. The construction method of the main structure of the gantry rail support intruding into the subway station entrance and exit according to claim 1, Features: In the step S300, after the remaining retaining piles are removed, the plurality of support members are connected to form a whole.

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