Supporting structure, construction method and system of annular pipe-roofing underground large-span space structure

Abstract

The invention belongs to the technical field of tunnels and underground engineering in civil engineering, and particularly relates to a supporting structure of an annular pipe-roofing underground large-span space structure, a construction method system and a system. The supporting structure comprises shield segments, the first shield segment and the second shield segment are correspondingly arranged in a first tunnel and a second tunnel formed by tunneling of a shield tunneling machine in an underground space of a shield segment respectively, and a first shield segment channel and a second shield segment channel are formed respectively; the upper annular pipe curtain group and the lower annular pipe curtain group are correspondingly arranged between the first shield segment channel and the second shield segment channel and connected with the first shield segment channel and the second shield segment channel, and a subway platform area is formed between the upper annular pipe curtain group and the lower annular pipe curtain group; and the pile structures are arranged at the pipe piece notches of the first shield pipe piece channel and the second shield pipe piece, the tops of the pile structures are connected with the upper circumferential pipe curtain group, and the bottoms of the pile structures are connected with the lower circumferential pipe curtain group.

Description

Technical Field

[0001] The present application belongs to the technical field of tunnels and underground engineering in civil engineering, and in particular to a support structure, a construction method system and a system for an annular pipe curtain underground large-span space structure. Background Art

[0002] With the acceleration of urbanization, the development and utilization of underground space has received more and more attention. Underground space can not only effectively alleviate ground traffic congestion and save land resources, but also provide cities with multiple functions, such as parking lots, commercial facilities, urban infrastructure, etc. However, the development of underground space faces many technical challenges, especially in the design and construction of large-span space structures.

[0003] At present, traditional underground space structures mostly adopt concrete frames or steel structures. Although these methods meet the stability requirements of the structure to a certain extent, in the case of large spans, problems such as material waste, complex construction technology, and long construction period often occur. Summary of the invention

[0004] Based on this, it is necessary to provide a support structure, construction method system and system for a large-span underground space structure of a circular pipe curtain in response to the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a support structure for an annular pipe-roof underground large-span space structure, comprising:

[0006] Shield segments, the shield segments comprising a first shield segment and a second shield segment, the first shield segment and the second shield segment are respectively arranged in a first tunnel and a second tunnel formed by the shield machine excavating in the underground space of the shield section, and respectively constitute a first shield segment channel and a second shield segment channel;

[0007] The upper annular pipe curtain group and the lower annular pipe curtain group are respectively arranged between the first shield segment channel and the second shield segment channel, and are respectively connected to the first shield segment channel and the second shield segment channel, and a subway platform area is formed between the upper annular pipe curtain group and the lower annular pipe curtain group;

[0008] The pile structure is arranged at the segment gap formed after the segments on the adjacent sides of the first shield segment channel and the second shield segment channel are removed, and the top of the pile structure is connected to the upper annular pipe curtain group, and the bottom is connected to the lower annular pipe curtain group.

[0009] In some practicable modes, the first shield segment channel and the second shield segment channel are arranged in parallel; the tunnel structures inside the first shield segment channel and the second shield segment channel, and the upper annular pipe curtain group and the lower annular pipe curtain group constitute the prototype of a subway station;

[0010] It also includes segment transverse supports and segment longitudinal supports, which are respectively arranged in the tunnel structure and connected to the tunnel structure through connection points.

[0011] Some practicable methods further include a first tube curtain transverse support, a second tube curtain transverse support, a tube curtain oblique support, a first tube curtain longitudinal support, and a second tube curtain longitudinal support; the first tube curtain transverse support, the second tube curtain transverse support, the tube curtain oblique support, the first tube curtain longitudinal support, and the second tube curtain longitudinal support are all arranged in the subway platform area; wherein,

[0012] The two ends of the first tube-roof transverse support are respectively connected to the inner walls of the two ends of the upper annular tube-roof group through connection points;

[0013] One end of the first tube curtain longitudinal support is connected to the upper annular tube curtain group through the connection point, and the other end is connected to the lower annular tube curtain group through the connection point;

[0014] The second tube curtain transverse support is arranged in the middle area of ​​the subway platform area and is disposed between the two first tube curtain longitudinal supports, and its two ends are respectively connected to the two first tube curtain longitudinal supports;

[0015] The second tube curtain longitudinal support is arranged between the two first tube curtain longitudinal supports, and the top end is connected to the upper annular tube curtain group through a connection point, and the bottom end is connected to the second tube curtain transverse support;

[0016] There are two pipe curtain oblique supports, and the top ends of the two pipe curtain oblique supports are connected to the overlapping areas of the first pipe curtain transverse support and the second pipe curtain longitudinal support; the bottom ends of the two pipe curtain oblique supports are respectively connected to the overlapping areas of the second pipe curtain transverse support and the first pipe curtain longitudinal support, so that the pipe curtain oblique supports, the second pipe curtain transverse support and the second pipe curtain longitudinal support together form a triangle, providing support for the central expansion of the subway platform area.

[0017] Some practicable methods further include a connecting structure, which is arranged between the first pipe curtain longitudinal support and the shield segment, with one end connected to the first pipe curtain longitudinal support and the other end connected to the shield segment; the connecting structure is arranged along the length direction of the shield segment, and the circumferential cross-section of the connecting structure is a concave structure; wherein the open end of the connecting structure is arranged horizontally, the end face of the open end is connected to the outer wall of the shield segment, and the outer end face of the closed end of the connecting structure is connected to the first pipe curtain longitudinal support.

[0018] Some of the possible implementations also include an upper cast structure layer and a lower cast structure layer; wherein,

[0019] When the first tube curtain transverse support, the second tube curtain transverse support, the tube curtain oblique support, the first tube curtain longitudinal support and the second tube curtain longitudinal support are removed, the upper cast structure layer and the lower cast structure layer are both formed by pouring concrete; wherein the upper cast structure layer is formed by pouring concrete under the upper annular tube curtain group, and the lower cast structure layer is formed by pouring concrete on the upper side of the lower annular tube curtain group;

[0020] It also includes a segment casting structure layer; wherein, part of the segments adjacent to the first shield segment channel and the second shield segment channel are removed so that the first shield segment channel and the second shield segment channel are both segment gaps of a "C"-shaped structure, the pile structure is set in the segment gap, the segment transverse support and the segment longitudinal support are removed, and the segment casting structure layer is set on the inner wall of the first shield segment channel and the second shield segment channel.

[0021] In a second aspect, the present application provides a construction method for a support structure of an annular pipe-roof underground large-span space structure, which is applied to the support structure of the annular pipe-roof underground large-span space structure, and the method includes:

[0022] Using a shield machine to excavate in the underground space of the shield section to form a first tunnel and a second tunnel;

[0023] Arranging a first shield segment and a second shield segment in the first tunnel and the second tunnel respectively, and forming a first shield segment channel and a second shield segment channel respectively;

[0024] An upper annular tube curtain group and a lower annular tube curtain group are arranged between the first shield segment channel and the second shield segment channel, and a subway platform area is formed between the upper annular tube curtain group and the lower annular tube curtain group;

[0025] After the segments on the adjacent sides of the first shield segment channel and the second shield segment channel are removed, a pile structure is arranged at the segment gaps formed;

[0026] The top and bottom of the pile structure are respectively connected to the upper annular pipe curtain group, and the bottom is connected to the lower annular pipe curtain group to form a supporting structure of the annular pipe curtain underground large-span space structure.

[0027] In some practicable manners, the step of arranging the first shield segment and the second shield segment in the first tunnel and the second tunnel respectively, and forming the first shield segment channel and the second shield segment channel respectively, includes:

[0028] The inner walls of the first shield segment channel and the second shield segment channel are supported laterally and longitudinally by using the segment transverse support and segment longitudinal support.

[0029] In some practicable manners, the step of arranging an upper annular pipe curtain group and a lower annular pipe curtain group between the first shield segment channel and the second shield segment channel, and forming a subway platform area between the upper annular pipe curtain group and the lower annular pipe curtain group includes:

[0030] The first tube curtain is used for lateral support to support the inner walls at both ends of the upper annular tube curtain group;

[0031] The first tube curtain longitudinal support is used to form support for the upper annular tube curtain group and the lower annular tube curtain group;

[0032] Using the second tube curtain transverse support to form support for the adjacent first tube curtain longitudinal support;

[0033] Using the second tube curtain longitudinal support to form support for the second tube curtain transverse support and the upper annular tube curtain group;

[0034] The tube curtain oblique support is used to form support for the overlapping area between the first tube curtain transverse support and the second tube curtain longitudinal support, and the overlapping area between the second tube curtain transverse support and the first tube curtain longitudinal support.

[0035] In some practicable methods, the step of connecting the top and bottom of the pile structure to the upper annular pipe-roof group respectively, and connecting the bottom to the lower annular pipe-roof group, to form a supporting structure of an annular pipe-roof underground large-span space structure includes:

[0036] Casting the inner wall of the upper annular pipe curtain group to form an upper casting structure layer;

[0037] Casting the inner wall of the lower annular pipe curtain group to form a lower casting structure layer;

[0038] After removing some segments on adjacent sides of the first shield segment channel and the second shield segment channel, the inner walls of the first shield segment channel and the second shield segment are cast to form a segment casting structure layer.

[0039] In a third aspect, the present application provides a construction system for a support structure of an annular pipe-roof underground large-span space structure, which is applied to the support structure of the annular pipe-roof underground large-span space structure, and the construction system includes:

[0040] The sensing layer includes geological sensors, displacement sensors and pressure sensors, wherein:

[0041] The geological sensors are arranged in the pipe curtain and the excavation surface to monitor the physical and mechanical parameters of the soil, including at least soil strength, water content and porosity;

[0042] The displacement sensors are installed at the contact point between the pipe curtain and the soil, surrounding buildings and the ground to monitor the deformation in real time;

[0043] The pressure sensor is arranged at the contact position between the pipe curtain and the soil, and monitors the change of the soil pressure borne by the pipe curtain;

[0044] A transmission layer, connected to the perception layer by wire or wirelessly, and used to collect data collected by the perception layer;

[0045] The decision layer is connected to the transport layer, and is used to receive the data collected by the transport layer, and analyze the data using a big data model to obtain a corresponding solution, wherein the decision layer is configured as follows:

[0046] transmitting the data to a target geological model and a target structural mechanics model;

[0047] Analyzing the data using the target geological model and the target structural mechanics model to obtain analysis results;

[0048] According to the analysis results, the corresponding solution is obtained. Beneficial effect: The present application provides a support structure of an annular pipe curtain underground large-span space structure, including shield segments, the shield segments include a first shield segment and a second shield segment, the first shield segment and the second shield segment are respectively arranged in a first tunnel and a second tunnel formed by the shield machine excavating in the underground space of the shield section, respectively constituting a first shield segment channel and a second shield segment channel; an upper annular pipe curtain group and a lower annular pipe curtain group are respectively arranged between the first shield segment channel and the second shield segment channel, and are respectively connected to the first shield segment channel and the second shield segment channel, and a subway platform area is formed between the upper annular pipe curtain group and the lower annular pipe curtain group; a pile structure is arranged at a segment gap formed by removing the segments on the adjacent sides of the first shield segment channel and the second shield segment channel, and the top is connected to the upper annular pipe curtain group, and the bottom is connected to the lower annular pipe curtain group. By laying an annular pipe curtain between two already constructed shield tunnels, a stable underground structure is formed, so that a support system can be constructed between the shield tunnel and the middle expansion space to ensure the stability of the expansion of the middle platform layer. The structure is used to support the upper and lower annular pipe curtain groups. The above structure can reduce material waste, complex construction technology, long construction period and other problems in the case of large spans. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 A schematic diagram of a support structure of an annular pipe-roof underground large-span space structure in an embodiment;

[0051] Figure 2 for Figure 1 A simple schematic diagram of

[0052] Figure 3 It is a schematic diagram of a structural cross section of a supporting structure of an annular pipe-curtain underground large-span space structure in an embodiment at the initial stage after the shield section construction is completed;

[0053] Figure 4 It is a schematic cross-sectional view of a support structure after excavation of the internal soil of an annular pipe-roof underground large-span space structure in one embodiment is completed;

[0054] Figure 5 It is a schematic diagram of a cross-section of a structure of a large-span underground space structure of a ring-shaped pipe curtain in one embodiment after the construction of the supporting structure is completed;

[0055] Figure 6 The present invention is a flow chart of a construction method of a supporting structure of an annular pipe-curtain underground large-span space structure in one embodiment.

[0056] Reference numerals:

[0057] 1. The first shield segment channel; 2. The second shield segment channel; 3. The upper annular pipe curtain group; 4. The lower annular pipe curtain group; 5. The pile structure; 6. The transverse support of the segment; 7. The longitudinal support of the segment; 8. The connection point; 9. The transverse support of the first pipe curtain; 10. The transverse support of the second pipe curtain; 11. The oblique support of the pipe curtain; 12. The longitudinal support of the first pipe curtain; 13. The longitudinal support of the second pipe curtain; 14. The connection structure; 15. The upper cast structure layer; 16. The lower cast structure layer; 17. The cast structure layer of the segment; 18. The first vehicle track; 19. The second vehicle track; 20. The platform. DETAILED DESCRIPTION

[0058] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all couplings of one or more related listed items.

[0060] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0061] Some terms involved in this application are explained below to facilitate understanding of this application:

[0062] Shield section, the area where the shield machine works.

[0063] In the case of large spans, there are often problems such as material waste, complex construction technology, and long construction period. In recent years, the annular pipe curtain structure has gradually attracted attention. This structural form can effectively share the load through the combination of annular pipes, and has good bending and shear resistance, strong adaptability, and can meet the needs of large-span spaces. At the same time, the annular pipe curtain structure can adopt a modular design during the construction process, which can improve construction efficiency, shorten the construction period, and reduce construction costs.

[0064] However, the current research on the annular pipe-roof structure is mostly focused on its theoretical analysis and preliminary design, and there is relatively little systematic research on specific construction methods, especially in the application of underground large-span space environments, and there is still a lack of mature solutions. Therefore, the development of a support structure, construction method system and system for an annular pipe-roof underground large-span space structure not only has important theoretical significance, but also has broad application prospects. It is a technical problem that needs to be solved urgently in the current construction engineering field.

[0065] In a first aspect, the present application provides a support structure for an annular pipe-curtain underground large-span space structure, including shield segments, an upper annular pipe-curtain group and a lower annular pipe-curtain group.

[0066] Specifically, during the shield section construction:

[0067] The shield segments include a first shield segment and a second shield segment. The first shield segment and the second shield segment are respectively arranged in a first tunnel and a second tunnel formed by excavating the shield machine in the underground space of the shield section, forming a first shield segment channel 1 and a second shield segment channel 2 respectively.

[0068] After the shield section construction is completed:

[0069] The upper annular pipe curtain group 3 and the lower annular pipe curtain group 4 are respectively arranged between the first shield segment channel 1 and the second shield segment channel 2, and are respectively connected to the first shield segment channel 1 and the second shield segment channel 2. A subway platform 20 area is formed between the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4; the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4 are both composed of a plurality of pipes, and each pipe is composed of a plurality of pipe sections. In addition, when the upper annular pipe curtain group 3 is assembled with the shield segment, since the underground space is soil except for the first tunnel and the second tunnel, each pipe in the upper annular pipe curtain group 3 needs to be extended from the first shield segment channel 1 to the second shield segment channel 2 with a set arc, and the two ends of the upper annular pipe curtain group 3 can abut on the lower left inner wall of the first shield segment and the lower right inner wall of the second shield segment. In this way, the external force on each pipe in the upper annular pipe curtain group 3 can be transmitted to the shield segment, and then transmitted from the shield segment to the underground outside the shield segment. However, due to the pressure from above, the lower annular pipe curtain group 4 will not be transmitted to both sides. Therefore, the two ends of the pipes in the lower annular pipe curtain group 4 do not need to extend into the shield segment.

[0070] The pile structure 5 is arranged at the segment gap formed by the removal of the segments on the adjacent sides of the first shield segment channel 1 and the second shield segment channel 2, and the top is connected to the upper annular pipe curtain group 3, and the bottom is connected to the lower annular pipe curtain group 4.

[0071] It should be noted that the first shield segment channel 1 and the second shield segment channel 2 are arranged in parallel; the tunnel structure inside the first shield segment channel 1 and the second shield segment channel 2, as well as the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4 constitute the prototype of the subway station. In other words, the prototype of the subway station uses the first shield segment channel 1 and the second shield segment channel 2 as the driving road; the enclosed area of ​​the first shield segment channel 1, the second shield segment channel 2, the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4 is used as the platform 20 of the subway station. In this case, the enclosed area can be expanded, and thus, the subway station at this time is called a prototype.

[0072] Further, in order to ensure the stability of the first shield segment channel 1 and the second shield segment channel 2, first, support is applied in the first shield segment channel 1 and the second shield segment channel 2, that is, a support structure of an annular pipe curtain underground large-span space structure also includes a segment transverse support 6 and a segment longitudinal support 7, which are respectively arranged in the tunnel structure and connected to the tunnel structure through a connection point 8. In this way, the segment transverse support 6 and the segment longitudinal support 7 are used to form support for the shield segment, so that the shield segment can form support for the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4. Exemplarily, the segment transverse support 6 and the segment longitudinal support 7 can be arranged separately, that is, the segment transverse support 6 and the segment longitudinal support 7 are arranged in the tunnel structure at intervals along the length direction of the tunnel structure, or the segment transverse support 6 and the segment longitudinal support 7 can be formed into a structure similar to a tic-tac-toe shape, which act together on a circumferential section to form support for the tunnel structure, which can be specifically arranged as needed.

[0073] Furthermore, after the construction of the shield section is completed, in order to ensure that the enclosed area of ​​the first shield segment channel 1, the second shield segment channel 2, the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4 has better support when expanding, a support structure of the underground large-span space structure of the annular pipe curtain also includes a first pipe curtain transverse support 9, a second pipe curtain transverse support 10, a pipe curtain oblique support 11, a first pipe curtain longitudinal support 12 and a second pipe curtain longitudinal support 13; the first pipe curtain transverse support 9, the second pipe curtain transverse support 10, the pipe curtain oblique support 11, the first pipe curtain longitudinal support 12 and the second pipe curtain longitudinal support 13 are all arranged in the subway platform 20 area.

[0074] Among them, the two ends of the first tube curtain transverse support 9 are respectively connected to the inner walls of the two ends of the upper annular tube curtain group 3 through the connection point 8; one end of the first tube curtain longitudinal support 12 is connected to the upper annular tube curtain group 3 through the connection point 8, and the other end is connected to the lower annular tube curtain group 4 through the connection point 8; the second tube curtain transverse support 10 is arranged in the middle area of ​​the subway platform 20 area, and is set between the two first tube curtain longitudinal supports 12, and its two ends are respectively connected to the two first tube curtain longitudinal supports 12; the second tube curtain longitudinal support 13 is arranged between the two first tube curtain longitudinal supports 12, and the top end is connected to the upper annular tube curtain group 3. The pipe curtain group 3 is connected through the connection point 8, and the bottom end is connected to the second pipe curtain transverse support 10; the number of the pipe curtain oblique supports 11 is two, and the top ends of the two pipe curtain oblique supports 11 are connected to the overlapping area of ​​the first pipe curtain transverse support 9 and the second pipe curtain longitudinal support 13; the bottom ends of the two pipe curtain oblique supports 11 are respectively connected to the overlapping area of ​​the second pipe curtain transverse support 10 and the first pipe curtain longitudinal support 12, so that the pipe curtain oblique support 11, the second pipe curtain transverse support 10 and the second pipe curtain longitudinal support 13 are surrounded to form a triangle, providing support for the expansion of the subway platform 20 area.

[0075] The above structure uses the pipe curtain transverse support and the pipe curtain longitudinal support to form support for the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4, and then uses the pipe curtain oblique support 11 to form further support for the maximum stress area of ​​the upper annular pipe curtain group 3, thereby ensuring the implementation of the expansion. In addition, in order to cooperate with the bottom stress point of the pipe curtain oblique support 11, a support is also provided on the outside of the first pipe curtain longitudinal support 12 at the connection between the pipe curtain oblique support 11, the first pipe curtain transverse support 9 and the first pipe curtain longitudinal support 12. In other words, a support structure for an annular pipe curtain underground large-span space structure also includes a connecting structure 14, which is provided between the first pipe curtain longitudinal support 12 and the shield segment, with one end connected to the first pipe curtain longitudinal support 12 and the other end connected to the shield segment. In this way, the connecting structure 14, as a support on the outside of the first pipe curtain longitudinal support 12, can provide support force for the pipe curtain oblique support 11, thereby preventing the pipe curtain oblique support 11 from exerting a large force on the first pipe curtain longitudinal support 12 during the expansion process, causing the first pipe curtain longitudinal support 12 to deform, thereby affecting the support of the first pipe curtain longitudinal support 12 to the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4.

[0076] It should be noted that in order to facilitate the connection or connection between the connection structure 14 and the circular first shield segment channel 1 and the second shield segment channel 2, the connection structure 14 is set to a concave structure. Exemplarily, the connection structure 14 is arranged along the length direction of the shield segment, and the circumferential cross-section of the connection structure 14 is a structure in which two side walls of the concave shape are provided with outwardly extending protrusions; wherein the open end of the connection structure 14 is arranged horizontally, the open end is connected to the outer wall of the shield segment, and the outer end surface of the closed end of the connection structure 14 is connected to the first pipe curtain longitudinal support 12.

[0077] In this way, the ends of the two side walls of the concave structure can adapt to the first shield segment channel 1 and the second shield segment channel 2 of the circular structure, forming two contact points, thereby improving the stability of the support. The protrusions can increase the strength of the connection structure 14.

[0078] In one embodiment, after the prototype subway station is expanded, the relevant supporting structures need to be dismantled, that is, after dismantling the first pipe curtain transverse support 9, the second pipe curtain transverse support 10, the pipe curtain diagonal support 11, the first pipe curtain longitudinal support 12 and the second pipe curtain longitudinal support 13, the adjacent parts of the first shield segment channel 1 and the second shield segment channel 2 are dismantled, so that the first shield segment channel 1 and the second shield segment channel 2 are both "C" shaped structures.

[0079] It should be noted that, when the first pipe curtain transverse support 9, the second pipe curtain transverse support 10, the pipe curtain oblique support 11, the first pipe curtain longitudinal support 12 and the second pipe curtain longitudinal support 13 are removed, then the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4 need to be poured with concrete to ensure stability. When part of the first pipe curtain transverse support 9, the second pipe curtain transverse support 10, the pipe curtain oblique support 11, the first pipe curtain longitudinal support 12 and the second pipe curtain longitudinal support 13 are removed, the removed part is poured with concrete for reinforcement. Specifically, a supporting structure of an annular pipe curtain underground large-span space structure also includes an upper pouring structure layer 15 and a lower pouring structure layer 16; the upper pouring structure layer 15 and the lower pouring structure layer 16 are both formed by pouring concrete; wherein, the upper pouring structure layer 15 is formed by pouring concrete below the upper annular pipe curtain group 3, and the lower pouring structure layer 16 is formed by pouring concrete above the lower annular pipe curtain group 4.

[0080] It should also be noted that when removing a portion of the first pipe curtain transverse support 9, the second pipe curtain transverse support 10, the pipe curtain oblique support 11, the first pipe curtain longitudinal support 12 and the second pipe curtain longitudinal support 13, and pouring concrete, the portion of the pipe segments adjacent to the first shield segment channel 1 and the second shield segment channel 2 can be further removed to form a "C"-shaped structure, so as to form an installation device for the pile structure 5. After the pile structure 5 is installed, the pile structure 5 and the first shield segment channel 1 or the second shield segment channel 2 form a "d"-shaped structure extending up and down. In this way, the pile structure 5 is used to support the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4, thereby ensuring the stability of the upper annular pipe curtain group 3 and the lower annular pipe curtain group 4.

[0081] Finally, it should be noted that the adjacent segments of the first shield segment channel 1 and the second shield segment channel 2 are removed so that the first shield segment channel 1 and the second shield segment channel 2 are both segment gaps of "C"-shaped structure. The pile structure 5 is set in the segment gap, and the segment transverse support 6 and the segment longitudinal support 7 are removed. In addition, if the end of the upper annular pipe curtain group 3 extends into the first shield segment channel 1 and the second shield segment channel 2 and abuts against the inner wall of the shield segment, it is also necessary to remove part of the upper annular pipe curtain group 3 in the first shield segment channel 1 and the second shield segment channel 2. In this way, no support will be arranged in the first shield segment channel 1 and the second shield segment channel 2. In order to ensure the stability of the first shield segment channel 1 and the second shield segment channel 2 after the segment transverse support 6 and the segment longitudinal support 7 are removed, a support structure of a large-span underground space structure of an annular pipe curtain also includes a segment casting structure layer 17, and the segment casting structure layer 17 is arranged on the inner wall of the first shield segment channel 1 and the second shield segment channel 2. That is, when the segment transverse support 6 and the segment longitudinal support 7 are removed, concrete is poured on the inner wall of the first shield segment channel 1 and the second shield segment channel 2 to form the segment casting structure layer 17, so as to improve the stability of the first shield segment channel 1 and the second shield segment channel 2.

[0082] Furthermore, the pile structure 5 can be adjusted to a more beautiful columnar structure as needed, or the outer wall of the pile structure 5 can be poured with concrete to form a beautiful columnar structure.

[0083] In one embodiment, after the construction of the shield section is completed, a supporting structure of a circular pipe-curtain underground large-span space structure also includes a first vehicle track 18, a second vehicle track 19 and a platform 20. The first vehicle track 18 and the second vehicle track 19 are laid in the first tunnel and the second tunnel respectively; wherein concrete is laid and poured between the first vehicle track 18 and the second vehicle track 19 to form the platform 20.

[0084] In a second aspect, the present application provides a construction method for a support structure of an annular pipe-roof underground large-span space structure, which is applied to the support structure of the annular pipe-roof underground large-span space structure, and the method includes:

[0085] S1, using a shield machine to excavate in the underground space of the shield section to form the first tunnel and the second tunnel;

[0086] S2, arranging the first shield segment and the second shield segment in the first tunnel and the second tunnel respectively, and forming the first shield segment channel and the second shield segment channel respectively;

[0087] S3, between the first shield segment channel and the second shield segment channel, an upper annular tube curtain group and a lower annular tube curtain group are arranged respectively, and a subway platform area is formed between the upper annular tube curtain group and the lower annular tube curtain group;

[0088] S4, arranging a pile structure at the segment gap formed after the segments on the adjacent sides of the first shield segment channel and the second shield segment channel are removed;

[0089] S5, the top and bottom of the pile structure are connected to the upper annular pipe curtain group respectively, and the bottom is connected to the lower annular pipe curtain group, so as to form a supporting structure of the annular pipe curtain underground large-span space structure.

[0090] In one embodiment, the steps of arranging the first shield segment and the second shield segment in the first tunnel and the second tunnel respectively, and forming the first shield segment channel and the second shield segment channel respectively, include:

[0091] The inner walls of the first shield segment channel and the second shield segment channel are supported laterally and longitudinally by using the segment transverse support and segment longitudinal support.

[0092] In one embodiment, between the first shield segment channel and the second shield segment channel, an upper annular tube curtain group and a lower annular tube curtain group are arranged respectively, and the steps of forming a subway platform area between the upper annular tube curtain group and the lower annular tube curtain group include:

[0093] The first tube curtain lateral support is used to form support for the inner walls at both ends of the upper annular tube curtain group;

[0094] The first tube curtain longitudinal support is used to form support for the upper annular tube curtain group and the lower annular tube curtain group;

[0095] Using the second tube curtain transverse support to form support for the adjacent first tube curtain longitudinal support;

[0096] The second pipe curtain longitudinal support is used to form support for the second pipe curtain transverse support and the upper annular pipe curtain group;

[0097] The tube curtain oblique support is utilized to form support for the overlapping area between the first tube curtain transverse support and the second tube curtain longitudinal support, and the overlapping area between the second tube curtain transverse support and the first tube curtain longitudinal support.

[0098] In one embodiment, the steps of connecting the top and bottom of the pile structure to the upper annular pipe curtain group respectively, and connecting the bottom to the lower annular pipe curtain group, to form a supporting structure of the annular pipe curtain underground large-span space structure include:

[0099] Cast the inner wall of the upper annular pipe curtain group to form an upper casting structure layer;

[0100] Casting the inner wall of the lower annular pipe curtain group to form a lower casting structure layer;

[0101] After removing some segments on the adjacent sides of the first shield segment channel and the second shield segment channel, the inner walls of the first shield segment channel and the second shield segment are cast to form a segment casting structure layer.

[0102] The second aspect of the present application provides a construction method for a support structure of an annular pipe-curtain underground large-span space structure. For specific steps of implementation, please refer to the description of the support structure of an annular pipe-curtain underground large-span space structure in the first aspect, which will not be repeated here.

[0103] During the formation and construction of the support structure of the underground large-span space structure of the annular pipe curtain, it is necessary to understand the relevant parameters of the soil in order to ensure the smooth progress of the construction. Therefore, the third aspect of the present application provides a construction system for the support structure of the underground large-span space structure of the annular pipe curtain, and the system includes a perception layer, a transmission layer and a decision-making layer.

[0104] The sensing layer includes geological sensors, displacement sensors and pressure sensors, among which:

[0105] Geological sensors are installed in the pipe curtain and on the excavation surface to monitor the physical and mechanical parameters of the soil, including at least soil strength, water content and porosity. Geological sensors are used to collect parameters such as soil strength, water content and porosity to form geological parameter data, so as to provide a basis for adjusting excavation parameters using the geological parameter data.

[0106] Displacement sensors are installed at the contact point between the pipe curtain and the soil, surrounding buildings and the ground to monitor deformation in real time. The displacement sensors collect the displacement and deformation conditions of different areas where displacement may occur, and form displacement data based on the displacement and deformation conditions, so as to timely discover potential safety risks based on the displacement data.

[0107] The pressure sensor is installed at the contact point between the pipe curtain and the soil to monitor the changes in the soil pressure on the pipe curtain. The pressure at the contact point between the pipe curtain and the soil is collected by the pressure sensor, thereby monitoring the changes in the pressure on the pipe curtain and forming pressure data, so as to ensure the safety of the pipe curtain structure based on the pressure data.

[0108] The transmission layer is connected to the perception layer by wired or wireless means, and is used to collect the data collected by the perception layer; the transmission layer collects geological parameter data, displacement data and pressure data respectively, and the collection method can be wired or wireless.

[0109] The decision layer is connected to the transport layer, and is used to receive the data collected by the transport layer, and use the big data model to analyze the data and obtain corresponding solutions. The decision layer is configured as follows:

[0110] Transferring data to a target geological model and a target structural mechanics model;

[0111] Analyze the data using the target geological model and the target structural mechanics model to obtain analysis results;

[0112] According to the analysis results, the corresponding solutions are obtained, wherein the solutions represent the methods for dealing with the problems that may arise during the excavation process for the area enclosed by the pipe curtain and the shield segment channel under the current data.

[0113] It should be noted that the decision layer can be a computer, which uses the computer to receive the geological parameter data, displacement data and pressure data transmitted by the transmission layer, and inputs these data into the target geological model and the target structural mechanics model respectively. By way of example, the geological parameter data is processed by the target geological model, and the displacement data and pressure data are processed by the target structural mechanics model, and corresponding solutions are output according to the target geological model and the target structural mechanics model.

[0114] The construction of the target geological model may include the following steps:

[0115] The historical geological parameter data is obtained, the solution is marked on the historical geological parameter data to form training data, the training data is input into the initial geological model, and the initial geological model is trained so as to adjust the parameters of the initial geological model to obtain the target geological model. In this way, the current geological parameter data is processed using the target geological model to obtain a geological solution.

[0116] Furthermore, the target structural mechanics model may include the following steps:

[0117] The historical displacement data and pressure data (structural mechanics data) are obtained, and the historical displacement data and pressure data are marked with solutions to form training data, and the training data are input into the initial structural mechanics model to train the initial structural mechanics model so as to adjust the parameters of the initial structural mechanics model and obtain the target structural mechanics model. In this way, the current displacement data and pressure data are processed using the target structural mechanics model to obtain a structural mechanics solution.

[0118] After obtaining the geological solution and structural mechanics solution, the following steps may also be included:

[0119] The target geological model and the target structural mechanics model are converted into geological functions and structural mechanics functions respectively; wherein, the conversion methods of the target geological model and the target structural mechanics model into geological functions and structural mechanics functions are the same, and the target geological model is used as an example to define geological target indicators, and a comprehensive indicator based on soil strength, water content and porosity is defined, for example, the soil stability index Sg = f (soil strength, water content, porosity), wherein f is a function, which can be a linear or nonlinear combination, so that the objective function can be set to maximize the soil stability index objective function g = max(Sg).

[0120] The geological function and the structural mechanics function are combined to obtain the objective function; after obtaining the geological function and the structural mechanics function, different weights are assigned to each of them, and the weights are multiplied by the corresponding functions, and finally the objective function is obtained by adding them together. For example, the objective function = geological function × W1 + structural mechanics function × W2, where W1 and W2 represent different weights.

[0121] The objective function is used as the calculation function of the multi-objective genetic algorithm, and the geological parameters and structural mechanics parameters are encoded as chromosomes; for example, real number encoding can be used to represent each parameter as a real number, and then multiple parameters are combined into a chromosome.

[0122] A certain number of chromosomes are randomly generated as the initial population, each chromosome represents a combination of a set of geological parameters and structural mechanics parameters;

[0123] In the randomly generated chromosomes, the fitness value is calculated for each chromosome through the objective function, where the fitness value is the weighted sum or other combination of the objective functions, which is used to measure the quality of the chromosome, and the weight is used to adjust the importance of the two objective functions;

[0124] According to the response value, excellent chromosomes are selected for reproduction to obtain reproduction chromosomes. The reproduction method may include roulette selection, tournament selection, etc.;

[0125] A crossover operation is performed on the reproduction chromosome to generate a new chromosome, wherein the crossover operation can use single-point crossover, multi-point crossover or uniform crossover, etc.

[0126] The new chromosome is mutated to obtain a mutated chromosome, wherein the newly generated chromosome is mutated to increase the diversity of the population. For example, the values ​​of certain genes in the chromosome may be randomly changed.

[0127] The mutant chromosomes and the chromosomes in the initial population are merged and non-dominated sorting is performed. The dominance relationship between all chromosomes is stratified by using a multi-objective genetic algorithm to find all non-dominated individuals and form the first-level non-dominated layer.

[0128] Then the first-level non-dominated layer is eliminated, and the remaining individuals are sorted non-dominatedly to form the second-level non-dominated layer until the termination condition is met, such as reaching the maximum number of iterations or the fitness value converges; where the individual refers to the chromosome, each chromosome represents a combination of a set of geological parameters and structural mechanics parameters, and is a potential solution in the optimization process;

[0129] The final non-dominated solution set is the Pareto (Pareto distribution) optimal solution set;

[0130] Analyze the Pareto optimal solution set and select one or more suitable solutions to apply in practical engineering.

[0131] Through the above methods, we can know that geological solutions usually focus on the stability of the soil. For example, in soft soil layers, reinforcement measures may be needed to improve the strength of the soil to prevent slippage or collapse during excavation, and corresponding solutions are given; structural mechanics solutions usually focus on the deformation control of the structure. For example, in soft soil layers, the structure may need a larger deformation space to adapt to the deformation of the soil to avoid structural damage, and corresponding solutions are given. Due to the different focuses of geological solutions and structural mechanics solutions, conflicts may occur when giving solutions. For example, reinforcement measures taken to improve soil stability may limit the deformation space of the structure, resulting in the structure being unable to effectively adapt when affected by soil deformation. In this case, a multi-objective genetic algorithm is used to achieve the joint optimization of geological parameters and structural mechanics parameters based on the objective functions given by the target geological model and the target structural mechanics model, and a solution that better meets actual engineering needs is found.

[0132] After obtaining the solution in the above steps, you can also integrate the experience and knowledge of industry experts. When it is impossible to make an accurate judgment or encounter complex problems, expert decision-making can provide decision support. Expert decision-making can be an analysis system formed by integrating the experience and knowledge of industry experts, so as to use the expert decision-making system to provide decision support.

[0133] After the solution is determined, the construction system of a support structure for a large-span underground space structure with a circular pipe curtain also includes an execution layer, which includes relevant equipment for excavation. The relevant equipment for excavation adjusts parameters such as excavation speed, cutting pressure, and excavation volume according to the instructions issued by the decision-making layer to achieve precise excavation.

[0134] Construction system of a support structure for a large-span underground space structure with a circular pipe curtain Construction preparation:

[0135] Complete the pipe curtain construction and inspect the pipe curtain structure to ensure it meets the design requirements.

[0136] Install the system's perception layer equipment and debug it to ensure accurate and reliable data collection.

[0137] Inspect and maintain intelligent excavation equipment (excavation related equipment) to ensure its performance is good.

[0138] Initial excavation: Start the intelligent excavation equipment and perform the initial excavation of the area enclosed by the pipe curtain and shield segment channel according to the preset excavation parameters. During the excavation process, geological, displacement, pressure and other data are collected in real time and transmitted to the control center. The decision-making layer analyzes the collected data to determine the stability of the excavation surface and the stress of the pipe curtain structure. If any abnormality is found, the excavation parameters are adjusted in time or corresponding treatment measures are taken.

[0139] Normal excavation: Based on the data feedback from the initial excavation stage, the decision-making layer optimizes the excavation parameters and enters the normal excavation stage. According to the instructions issued by the decision-making layer, the intelligent excavation equipment automatically adjusts the excavation speed, cutting pressure and other parameters to achieve efficient and accurate excavation. The perception layer continuously monitors geological, displacement, pressure and other data to grasp the changes in the construction process in real time and adjust the construction parameters and construction plans in a timely manner.

[0140] Special situation handling: When encountering special situations such as geological mutations, pipe curtain structure damage, and abnormal surrounding environment, the decision-making layer will quickly issue an alarm and transmit relevant data to the expert decision-making system. The expert decision-making system will formulate targeted treatment plans based on the actual situation on site and expert experience, and the execution layer equipment will quickly execute them to ensure safe and smooth construction.

[0141] Excavation completion: After excavation reaches the designed depth and range, the underground space is inspected to check whether the excavation size, pipe curtain structure integrity, support quality, etc. meet the design requirements. The equipment of the intelligent excavation system is dismantled, and the underground space is cleaned and organized to prepare for subsequent engineering construction.

[0142] Implementation of a construction system for the support structure of a circular pipe-roof underground large-span space structure:

[0143] Sensing layer: After the pipe curtain is constructed, geological sensors are arranged every 0.5 meters inside the pipe curtain, and geological sensors are distributed at a certain density on the excavation surface to fully obtain the physical and mechanical parameters of the soil. Displacement sensors are set every 0.5 meters at the key nodes of the pipe curtain structure, the foundations and key parts of surrounding buildings, and the ground. Pressure sensors are installed every 0.5 degrees in the circumferential direction where the pipe curtain contacts the soil.

[0144] Transmission layer: Optical fiber is used for wired data transmission within the tube curtain and at short distances. For the displacement sensor data of the surrounding buildings and the ground far away, wireless transmission modules are used for transmission. Before data transmission, the data can be encrypted by encryption algorithms.

[0145] Decision-making layer: Analyze the collected data and establish geological models and structural mechanics models. The expert decision-making system collects a large number of industry experts' experience in dealing with similar engineering problems, establishes a knowledge base and reasoning mechanism, and uses the knowledge base and reasoning mechanism to give expert opinions on solutions. Specifically, keywords can be constructed after the knowledge base is established, and matched with the knowledge base according to the keyword matching method of the solution, so as to obtain expert processing opinions.

[0146] Execution layer: The intelligent excavation equipment adjusts the excavation speed, cutting pressure and other parameters by adjusting the motor speed of the excavation equipment, the pressure of the hydraulic system, etc. according to the instructions of the decision-making layer.

[0147] Implementation of construction methods

[0148] Construction preparation: After the pipe curtain construction is completed, the integrity of the pipe curtain structure is tested by non-destructive testing and other methods. After the sensor layer equipment is installed, simulated data collection and transmission tests are carried out to ensure that the data is accurate and reliable. No-load and load debugging of intelligent excavation equipment and support equipment is carried out to check equipment performance.

[0149] Initial excavation: The excavation equipment starts excavation at a preset lower speed and smaller cutting pressure, collecting geological, displacement, pressure and other data every minute. The intelligent analysis software (decision-making layer) analyzes the data in real time. If it is found that the soil strength changes by more than 5%, the excavation speed is immediately reduced and the cutting pressure is increased.

[0150] Normal excavation: After optimizing the parameters based on the initial excavation data, the excavation equipment excavates at the optimized speed and pressure. A comprehensive analysis of the collected data is conducted every 5 minutes, and the construction parameters are fine-tuned based on the analysis results.

[0151] Special situation handling: If a sudden geological change occurs, such as soil suddenly becoming soft, the intelligent analysis software will sound an alarm and transmit the data to the expert decision-making system. The expert decision-making system will formulate treatment plans such as increasing support density and reducing excavation speed based on the knowledge base and field data, which will be executed by the execution layer equipment.

[0152] Excavation completed: After excavation is completed, use measuring instruments to detect the excavation size of the underground space, and check the integrity of the pipe curtain structure and the quality of support through appearance inspection and non-destructive testing. When dismantling the equipment, proceed in the order of outside first, inside second, easy first, difficult second, and clean and organize the underground space.

[0153] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0154] The various embodiments in the present disclosure are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0155] The protection scope of the present disclosure is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the scope and spirit of the present disclosure. If these changes and modifications fall within the scope of the claims of the present disclosure and their equivalents, the intention of the present disclosure also includes these changes and modifications.

Claims

1. A supporting structure for an annular pipe-roof underground large-span space structure, characterized in that: include: Shield segments, the shield segments comprising a first shield segment and a second shield segment, the first shield segment and the second shield segment are respectively arranged in a first tunnel and a second tunnel formed by the shield machine excavating in the underground space of the shield section, and respectively constitute a first shield segment channel and a second shield segment channel; The upper annular pipe curtain group and the lower annular pipe curtain group are respectively arranged between the first shield segment channel and the second shield segment channel, and are respectively connected to the first shield segment channel and the second shield segment channel, and a subway platform area is formed between the upper annular pipe curtain group and the lower annular pipe curtain group; The pile structure is arranged at the segment gap formed after the segments on the adjacent sides of the first shield segment channel and the second shield segment channel are removed, and the top of the pile structure is connected to the upper annular pipe curtain group, and the bottom is connected to the lower annular pipe curtain group.

2. The supporting structure of the annular pipe-roof underground large-span space structure according to claim 1 is characterized in that: The first shield segment channel and the second shield segment channel are arranged in parallel; the tunnel structures inside the first shield segment channel and the second shield segment channel, and the upper annular pipe curtain group and the lower annular pipe curtain group constitute the prototype of a subway station; It also includes segment transverse supports and segment longitudinal supports, which are respectively arranged in the tunnel structure and connected to the tunnel structure through connection points.

3. The supporting structure of the annular pipe-roof underground large-span space structure according to claim 1 is characterized in that: It also includes a first tube curtain transverse support, a second tube curtain transverse support, a tube curtain oblique support, a first tube curtain longitudinal support, and a second tube curtain longitudinal support; the first tube curtain transverse support, the second tube curtain transverse support, the tube curtain oblique support, the first tube curtain longitudinal support, and the second tube curtain longitudinal support are all arranged in the subway platform area; wherein, The two ends of the first tube-roof transverse support are respectively connected to the inner walls of the two ends of the upper annular tube-roof group through connection points; One end of the first tube curtain longitudinal support is connected to the upper annular tube curtain group through the connection point, and the other end is connected to the lower annular tube curtain group through the connection point; The second tube curtain transverse support is arranged in the middle area of ​​the subway platform area and is disposed between the two first tube curtain longitudinal supports, and its two ends are respectively connected to the two first tube curtain longitudinal supports; The second tube curtain longitudinal support is arranged between the two first tube curtain longitudinal supports, and the top end is connected to the upper annular tube curtain group through a connection point, and the bottom end is connected to the second tube curtain transverse support; There are two pipe curtain oblique supports, and the top ends of the two pipe curtain oblique supports are connected to the overlapping areas of the first pipe curtain transverse support and the second pipe curtain longitudinal support; the bottom ends of the two pipe curtain oblique supports are respectively connected to the overlapping areas of the second pipe curtain transverse support and the first pipe curtain longitudinal support, so that the pipe curtain oblique supports, the second pipe curtain transverse support and the second pipe curtain longitudinal support together form a triangle, providing support for the central expansion of the subway platform area.

4. The supporting structure of the annular pipe-roof underground large-span space structure according to claim 3 is characterized in that: It also includes a connecting structure, which is arranged between the first pipe curtain longitudinal support and the shield segment, with one end connected to the first pipe curtain longitudinal support and the other end connected to the shield segment; the connecting structure is arranged along the length direction of the shield segment, and the circumferential cross-section of the connecting structure is a concave structure; wherein the open end of the connecting structure is arranged horizontally, the end face of the open end is connected to the outer wall of the shield segment, and the outer end face of the closed end of the connecting structure is connected to the first pipe curtain longitudinal support.

5. The supporting structure of the annular pipe-roof underground large-span space structure according to claim 4 is characterized in that: It also includes an upper pouring structure layer and a lower pouring structure layer; wherein, When the first tube curtain transverse support, the second tube curtain transverse support, the tube curtain oblique support, the first tube curtain longitudinal support and the second tube curtain longitudinal support are removed, the upper cast structure layer and the lower cast structure layer are both formed by pouring concrete; wherein the upper cast structure layer is formed by pouring concrete under the upper annular tube curtain group, and the lower cast structure layer is formed by pouring concrete on the upper side of the lower annular tube curtain group; It also includes a segment casting structure layer; wherein, part of the segments adjacent to the first shield segment channel and the second shield segment channel are removed so that the first shield segment channel and the second shield segment channel are both segment gaps of a "C"-shaped structure, the pile structure is set in the segment gap, the segment transverse support and the segment longitudinal support are removed, and the segment casting structure layer is set on the inner walls of the first shield segment channel and the second shield segment channel.

6. A construction method for a supporting structure of an annular pipe-roof underground large-span space structure, characterized in that: The supporting structure of the annular pipe-curtain underground large-span space structure applied to any one of claims 1 to 5 comprises: Using a shield machine to excavate in the underground space of the shield section to form a first tunnel and a second tunnel; Arranging a first shield segment and a second shield segment in the first tunnel and the second tunnel respectively, and forming a first shield segment channel and a second shield segment channel respectively; An upper annular tube curtain group and a lower annular tube curtain group are arranged between the first shield segment channel and the second shield segment channel, and a subway platform area is formed between the upper annular tube curtain group and the lower annular tube curtain group; After the segments on the adjacent sides of the first shield segment channel and the second shield segment channel are removed, a pile structure is arranged at the segment gaps formed; The top and bottom of the pile structure are respectively connected to the upper annular pipe curtain group, and the bottom is connected to the lower annular pipe curtain group to form a supporting structure of the annular pipe curtain underground large-span space structure.

7. The construction method of the supporting structure of the annular pipe curtain underground large-span space structure according to claim 6 is characterized in that: The step of arranging the first shield segment and the second shield segment in the first tunnel and the second tunnel to form the first shield segment channel and the second shield segment channel respectively includes: The inner walls of the first shield segment channel and the second shield segment channel are supported laterally and longitudinally by using the segment transverse support and segment longitudinal support.

8. The construction method of the supporting structure of the annular pipe-roof underground large-span space structure according to claim 6 is characterized in that: The step of arranging an upper annular tube curtain group and a lower annular tube curtain group between the first shield segment channel and the second shield segment channel, and forming a subway platform area between the upper annular tube curtain group and the lower annular tube curtain group comprises: The first tube curtain is used for lateral support to support the inner walls at both ends of the upper annular tube curtain group; The first tube curtain longitudinal support is used to form support for the upper annular tube curtain group and the lower annular tube curtain group; Using the second tube curtain transverse support to form support for the adjacent first tube curtain longitudinal support; Using the second tube curtain longitudinal support to form support for the second tube curtain transverse support and the upper annular tube curtain group; The tube curtain oblique support is used to form support for the overlapping area between the first tube curtain transverse support and the second tube curtain longitudinal support, and the overlapping area between the second tube curtain transverse support and the first tube curtain longitudinal support.

9. The construction method of the supporting structure of the annular pipe-roof underground large-span space structure according to claim 8 is characterized in that: The step of connecting the top and bottom of the pile structure to the upper annular pipe curtain group respectively, and connecting the bottom to the lower annular pipe curtain group to form a supporting structure of the annular pipe curtain underground large-span space structure includes: Casting the inner wall of the upper annular pipe curtain group to form an upper casting structure layer; Casting the inner wall of the lower annular pipe curtain group to form a lower casting structure layer; After removing some segments on adjacent sides of the first shield segment channel and the second shield segment channel, the inner walls of the first shield segment channel and the second shield segment are cast to form a segment casting structure layer.

10. A construction system for a supporting structure of an annular pipe-roof underground large-span space structure, characterized in that: The supporting structure of the annular pipe-curtain underground large-span space structure applied to any one of claims 1 to 5, the construction system comprises: The sensing layer includes geological sensors, displacement sensors and pressure sensors, wherein: The geological sensors are arranged in the pipe curtain and the excavation surface to monitor the physical and mechanical parameters of the soil, including at least soil strength, water content and porosity; The displacement sensors are installed at the contact point between the pipe curtain and the soil, surrounding buildings and the ground to monitor the deformation in real time; The pressure sensor is arranged at the contact position between the pipe curtain and the soil, and monitors the change of the soil pressure borne by the pipe curtain; A transmission layer, connected to the perception layer by wire or wirelessly, and used to collect data collected by the perception layer; The decision layer is connected to the transport layer, and is used to receive the data collected by the transport layer, and analyze the data using a big data model to obtain a corresponding solution, wherein the decision layer is configured as follows: transmitting the data to a target geological model and a target structural mechanics model; Analyzing the data using the target geological model and the target structural mechanics model to obtain analysis results; According to the analysis results, corresponding solutions are obtained.

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