An underground large-span platform column-free station structure and construction method thereof

Abstract

The present invention discloses an underground large-span platform column-free station structure and a construction method thereof, which belongs to the technical field of underground station construction. The present invention forms a space for accommodating equipment pipelines between the roof of the existing station and a corresponding horizontal tie plate is set below the roof arch, and the corresponding setting of the prestressed balance cable and the hanging plate ensures the reliable setting of the horizontal tie plate. The underground large-span platform column-free station structure of the present invention has a simple structure and convenient construction, and can effectively replace the existing underground station structure, avoid the same-layer setting of the equipment pipeline layer and the station hall layer, reduce the setting height of the station hall layer and the structural burial depth of the station, and can significantly reduce the setting of structural columns in the station hall layer and the platform layer of the underground station structure, improve the permeability of the underground station space utilization, facilitate passengers to get on and off the train, and improve the convenience of use of the underground station, and has good application prospects and promotion value.

Description

Technical Field

[0001] The invention belongs to the technical field of underground station construction, and in particular relates to an underground large-span platform column-free station structure and a construction method thereof. Background Art

[0002] With the continuous deepening of infrastructure construction in my country, the rail transit industry has also been greatly developed, and the forms and mileage of rail transit have increased significantly. In the field of rail transit, underground stations are widely used, especially in urban rail transit systems dominated by subways, where the construction of underground stations is often indispensable.

[0003] At present, most common multi-platform underground stations are as follows Figure 1 As shown in the figure, the station hall and platform are separated vertically by the top plate, the station hall floor and the bottom plate, and multiple structural columns are arranged in each layer for support. The design of the above underground station effectively meets the operation and parking requirements of multi-platform underground rail transit and solves the boarding and alighting transfer needs of underground rail transit.

[0004] However, after a long period of application, it was found that the above-mentioned multi-platform underground stations also have obvious problems, mainly manifested in: the above-mentioned multi-platform underground stations have more structural columns inside the station, which makes it inconvenient for passengers to pass through and blocks a lot of vision; at the same time, the station hall and the pipelines are arranged on the same level, resulting in a large overall height of the station hall and a deep structural burial depth, which requires a large amount of land resources, and thus leads to a large construction scale and engineering investment for the underground station. Summary of the invention

[0005] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides an underground large-span platform column-free station structure and a construction method thereof, which can reduce the setting of structural columns in multi-platform underground stations while realizing the corresponding setting of multi-platform underground stations, thereby facilitating the passage of passengers, reducing the scale and burial depth of the station, saving project investment, and reducing the occupation of land resources.

[0006] To achieve the above object, one aspect of the present invention provides an underground large-span platform column-free station structure, comprising oppositely arranged side walls, a bottom plate arranged between the bottoms of the two side walls, and a station hall floor plate arranged above the bottom plate; it also includes a top plate arch and a horizontal tie plate;

[0007] The horizontal tie plate is arranged above the station hall floor, and its two ends in the horizontal direction are respectively connected to the two side walls, and a plurality of balancing cable assemblies are arranged in the horizontal tie plate; the balancing cable assemblies include prestressed balancing cables arranged in pairs in the horizontal direction, and the ends of the two prestressed balancing cables that are separated from each other are respectively connected to the balancing cable anchoring end anchors in the corresponding side walls, and the other ends of the two prestressed balancing cables are overlapped in the middle of the horizontal tie plate and respectively matched with the corresponding balancing cable tensioning end anchors;

[0008] The top plate arch is arranged above the horizontal tie plate, and its two ends are respectively connected to the tops of the two side walls, and a space for accommodating equipment pipelines is formed between the top plate arch and the horizontal tie plate; and a plurality of hangers are arranged between the top plate arch and the horizontal tie plate, the top of the hanger is connected to the top plate arch, and the bottom of the hanger is connected to the horizontal tie plate, so as to transfer the load on the horizontal tie plate to the top plate arch.

[0009] As a further improvement of the present invention, a plurality of suspension rods are arranged between the horizontal tie plate and the station hall floor; the top of the suspension rod is connected to the horizontal tie plate, and the bottom thereof is connected to the station hall floor.

[0010] As a further improvement of the present invention, the top of the suspension rod passes through the horizontal tie plate and vertically passes through the corresponding suspension plate and is then embedded and connected in the top plate arch.

[0011] As a further improvement of the present invention, the balancing cable components are multiple and longitudinally spaced apart.

[0012] As a further improvement of the present invention, a plurality of bottom longitudinal beams extending in the longitudinal direction are arranged below the bottom plate, and a plurality of anti-pulling piles are arranged on at least one of the bottom longitudinal beams.

[0013] As a further improvement of the present invention, at least one platform floor slab extending in the longitudinal direction is arranged on the bottom plate.

[0014] As a further improvement of the present invention, a plurality of middle longitudinal beams extending in the longitudinal direction are arranged at the bottom of the horizontal tie plate, and the bottom of the suspension rod is embedded in the middle longitudinal beams.

[0015] Another aspect of the present invention provides a construction method for an underground large-span platform column-free station structure, which includes the following construction steps:

[0016] (1) constructing a plurality of bottom longitudinal beams extending in the longitudinal direction at the bottom of the construction pit of the underground station, and constructing a bottom plate on the bottom longitudinal beams so that the bottom plate and the bottom longitudinal beams form an integral structure;

[0017] (2) Scaffolding is set up above the base plate, and side walls are constructed upwards on both sides of the base plate, and the middle longitudinal beam and the station hall floor slab are constructed in sequence above the base plate corresponding to the design position of the station hall floor slab, so that the middle longitudinal beam and the station hall floor slab form an integral structure, and the two sides of the station hall floor slab are connected to the side walls respectively;

[0018] (3) Scaffolding is set up on the floor slab of the station hall to carry out the construction of the top arch of the side walls on both sides and the top of the station structure, so that the arch feet of the top arch are supported on the top of the side walls respectively; at the same time, a number of balancing cable anchorage end anchors are respectively set on the top of the two side walls;

[0019] (4) constructing a hanging board under the roof arch using a hanging basket so that the top of the hanging board is fixedly connected to the roof arch and the bottom of the hanging board hangs downward;

[0020] (5) The horizontal tie plate is constructed so that its two sides are connected to the two side walls respectively and fixedly connected to the bottom of each hanging plate; at the same time, a prestressed balancing cable is correspondingly arranged in the horizontal tie plate, so that one end of the prestressed balancing cable is connected to the balancing cable anchoring end anchor on the corresponding side wall, and the other end extends to the middle of the horizontal tie plate in the horizontal direction and overlaps with the end of the prestressed balancing cable anchored on the other side wall, and the two overlapped ends of the prestressed balancing cable are respectively matched with the balancing cable tensioning end anchors arranged in the middle of the horizontal tie plate;

[0021] (6) Tensioning of various prestressed balance cables, construction of supporting structures in underground stations, and installation of corresponding equipment pipelines between horizontal tie plates and top arches;

[0022] (7) Remove the corresponding scaffolding and restore the space inside the underground station; then, backfill the top outer side of the top arch to complete the construction of the underground large-span platform column-free station.

[0023] As a further improvement of the present invention, the construction of anti-pullout piles is also carried out before the construction of the bottom longitudinal beam, and the construction process is as follows:

[0024] At the bottom longitudinal beam construction position, anti-pullout piles are constructed vertically downward, and a plurality of anti-pullout piles are arranged at intervals in the longitudinal direction of the same bottom longitudinal beam. During the subsequent bottom longitudinal beam construction, the tops of the anti-pullout piles are respectively connected to the corresponding bottom longitudinal beams.

[0025] As a further improvement of the present invention, the construction of the suspension rod is also included, and the construction process is as follows:

[0026] When constructing the station hall floor slab, the bottom connecting end of the hanger is preset at the corresponding position, and when constructing the horizontal tie plate, the top connecting end of the hanger is preset in the horizontal tie plate, so that the bottom connecting end and the corresponding top connecting end are coaxially corresponding in the vertical direction; thereafter, a hanger is arranged between the horizontal tie plate and the station hall floor slab, so that the top of the hanger is connected to the top connecting end, and the bottom of the hanger is connected to the corresponding bottom connecting end, so that the load on the station hall floor slab can be transferred to the top plate arch through each hanger.

[0027] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0028] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0029] (1) The column-free station structure of the underground large-span platform of the present invention is to set the top plate of the existing station as a top plate arch and to set a horizontal tie plate correspondingly under the top plate arch, so that a space for accommodating equipment pipelines is formed between the top plate arch and the horizontal tie plate, thereby avoiding the equipment pipeline layer and the station hall layer being set on the same floor, reducing the setting height of the station hall layer and the buried depth of the station structure, and greatly reducing the construction workload of the project; at the same time, by using the corresponding setting of the prestressed balance cable and the hanger plate, the reliable support of the horizontal tie plate is effectively achieved, the setting of the structural columns in the station hall layer is reduced, the construction period is shortened, and the permeability of the station hall layer during use is improved;

[0030] (2) The underground large-span platform column-free station structure of the present invention has correspondingly arranged hangers between the horizontal tie plates and the station hall floor slab, so that the load of the station hall floor slab can be effectively transferred to the horizontal tie plates, and then transferred to the top plate arch and side walls through the prestressed balance cables and hangers, which effectively ensures the stability of the station hall floor slab setting while avoiding the setting of a large number of supporting structure columns in the platform layer, thereby improving the permeability of the platform layer after setting, facilitating passengers getting on and off the train, and realizing the setting of a column-free space on the platform layer;

[0031] (3) The column-free station structure of the underground large-span platform of the present invention extends the top of the hanger rod and sets it in the hanger plate and fixes it to the top plate arch, so that the hanger rod and the hanger plate can form an integral force-bearing structure and reliably transfer the load to the top plate arch, effectively improving the stability and reliability of the load transfer of the horizontal tie plate and the station hall floor slab, and ensuring the operational safety of the column-free station structure of the underground large-span platform;

[0032] (4) The underground large-span platform column-free station structure of the present invention has anti-pullout piles arranged at the bottom of the bottom longitudinal beam, which greatly improves the stability of the bottom plate and the bottom longitudinal beam after installation, and effectively ensures the stability of the underground large-span platform column-free station structure;

[0033] (5) The underground large-span platform column-free station structure of the present invention has a simple structure and is easy to construct. It can effectively replace the existing underground station structure, avoid the same-level setting of the equipment and pipeline layer and the station hall layer, reduce the setting height of the station hall layer and the structural burial depth of the station, and can significantly reduce the setting of structural columns in the station hall layer and platform layer of the underground station structure, thereby improving the permeability of the underground station space utilization, facilitating passengers getting on and off the train, and improving the convenience of using the underground station. It has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structural section of a common underground large-span platform station in the prior art;

[0035] Figure 2 Schematic diagram of the structural section of the underground large-span platform column-free station structure in an embodiment of the present invention;

[0036] Figure 3 1 is a schematic diagram of a construction process 1 of a column-free station structure of an underground large-span platform in an embodiment of the present invention;

[0037] Figure 4 2 is a schematic diagram of a construction process 2 of a column-free station structure of an underground large-span platform in an embodiment of the present invention;

[0038] Figure 5 3 is a schematic diagram of the construction process of the column-free station structure of the underground large-span platform in an embodiment of the present invention;

[0039] Figure 6 4 is a schematic diagram of the construction process of the underground large-span platform column-free station structure according to an embodiment of the present invention;

[0040] Figure 7 5 is a schematic diagram of the construction process of the column-free station structure of the underground large-span platform in an embodiment of the present invention;

[0041] Figure 8 6 is a schematic diagram of the construction process of the column-free station structure of the underground large-span platform in an embodiment of the present invention;

[0042] Fig. 9 7 is a schematic diagram of the construction process of the underground large-span platform column-free station structure according to an embodiment of the present invention;

[0043] Fig.10 It is a schematic diagram of the construction process 8 of the underground large-span platform column-free station structure in an embodiment of the present invention;

[0044] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0045] 11. Roof arch; 12. Horizontal tie plate; 13. Hanging plate; 14. Prestressed balancing cable; 151. Anchor at the anchoring end of the balancing cable; 152. Anchor at the tensioning end of the balancing cable; 16. Hanging rod; 17. Roof; 18. Roof longitudinal beam; 19. Structural column; 21. Concourse floor; 22. Middle longitudinal beam; 23. Track top air duct; 31. Platform floor; 32. Bottom plate; 33. Bottom longitudinal beam; 34. Pull-out pile; 41. Equipment pipeline; 51. Side wall; 61. Concourse ceiling. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] Example:

[0052] See also Figure 2 The underground large-span platform column-free station structure in the preferred embodiment of the present invention includes side walls 51 arranged on both sides, and a top plate arch 11, a horizontal tie plate 12, a station hall floor 21 and a platform floor 31 arranged between the two side walls 51 and spaced apart in sequence in the vertical direction. The side walls 51 and the above-mentioned plates extend continuously in the longitudinal direction and separate the equipment pipeline layer, the station hall layer and the platform layer in sequence in the vertical direction.

[0053] Specifically, the bottom of the underground large-span platform column-free station structure in the preferred embodiment is provided with a bottom plate 32, the two sides of which are respectively connected to the two side walls 51, and a plurality of bottom longitudinal beams 33 are arranged at intervals at the bottom of the bottom plate 32. Each bottom longitudinal beam 33 extends in the longitudinal direction, and a plurality of pull-out piles 34 are respectively arranged corresponding to each bottom longitudinal beam 33. In the preferred embodiment, the pull-out piles 34 are arranged vertically, the main structure of which is connected in the soil layer, and the top of which is connected in the bottom longitudinal beam 33.

[0054] It can be understood that, in actual arrangement, in order to ensure the reliability of the arrangement of the bottom plate 32 and the bottom longitudinal beam 33 , a plurality of anti-pulling piles 34 are arranged at intervals in the extending direction of each bottom longitudinal beam 33 .

[0055] Furthermore, at least one track area is formed on the bottom plate 32, and at least one platform floor slab 31 is provided corresponding to each track area. The platform floor slab 31 extends longitudinally with the track area, so that passengers on the rail transit vehicle can complete the process of waiting for the train, getting on and off the train, etc. on the platform floor slab 31. Figure 2 In the underground large-span platform column-free station shown in , the number of track areas is three, and correspondingly, the number of platform floor slabs 31 is two, which can meet the boarding and alighting needs of four rail transit trains.

[0056] At the same time, a hall floor 21 is arranged above the bottom plate 32, and its two sides are respectively connected to the side walls 51, and the platform layer is separated between the bottom plate 32 and the hall floor 21. Correspondingly, track top air ducts 23 are arranged longitudinally at the bottom of the hall floor 21 corresponding to each rail transit line thereunder. At the same time, a plurality of middle longitudinal beams 22 are arranged at intervals at the bottom of the hall floor 21, and each middle longitudinal beam 22 extends longitudinally to improve the structural stability of the hall floor 21. In actual setting, the setting position of the middle longitudinal beam 22 preferably corresponds to the setting position of each bottom longitudinal beam 33 in the vertical direction, such as Figure 2 as shown in .

[0057] Furthermore, a horizontal tie plate 12 is provided above the station hall floor 21 , and the horizontal tie plate 12 is connected to the side walls 51 on both sides in the horizontal direction, and the station hall floor is separated between the horizontal tie plate 12 and the station hall floor 21 .

[0058] Specifically, in the preferred embodiment, a prestressed component is provided in the horizontal tie plate 12, which includes two prestressed balancing cables 14 arranged in pairs on both sides of the horizontal tie plate 12. The prestressed balancing cables 14 are arranged in the transverse direction, one end of which is an anchoring end, and the other end is a tensioning end. In the preferred embodiment, the anchoring end of the prestressed balancing cable 14 is fixed to the side wall 51 on one side through the balancing cable anchoring end anchor 151, and the tensioning end thereof is fixed to the middle part of the horizontal tie plate 12 through the balancing cable tensioning end anchor 152. In actual setting, prestressed balancing cables 14 are respectively provided on both sides of the horizontal tie plate 12, such as Figure 2 At the same time, two prestressed balancing cables 14 in the transverse direction of the horizontal tie plate 12 are overlapped at the middle of the horizontal tie plate 12. By applying prestress to the prestressed balancing cables 14, the horizontal thrust at the arch foot of the top plate arch 11 can be balanced.

[0059] In actual configuration, the horizontal tie plate 12 extends longitudinally, and accordingly, a plurality of prestressed components are longitudinally spaced apart in the horizontal tie plate 12 to ensure the structural stress stability at each longitudinal position of the horizontal tie plate 12 .

[0060] Furthermore, the top of the column-free station structure is configured as an arch, that is, a top plate arch 11 is provided above the horizontal tie plate 12 and extends longitudinally, and is an upwardly arched arc plate structure, and the arch feet on both sides of the lateral direction are respectively supported and connected to the top of the side wall 51, and a space such as a top plate arch 11 and a horizontal tie plate 12 is formed. Figure 2 The accommodation space shown in the figure can be used to accommodate the equipment pipeline 41, forming an equipment pipeline layer. Moreover, by setting up the equipment pipeline layer, it is possible to avoid laying the equipment pipeline 41 on the same floor in the station hall layer, thereby reducing the height of the station hall layer and the buried depth of the structure. In the preferred embodiment, the lateral sides of the horizontal tie plate 12 are respectively connected to the arch foot of the top plate arch 11.

[0061] In order to ensure the stability of the horizontal tie plate 12, a plurality of hanger plates 13 are arranged at intervals in the equipment pipeline layer. The hanger plates 13 are arranged vertically, with the top connected to the top plate arch 11 and the bottom fixedly connected to the horizontal tie plate 12, to ensure that the load on the horizontal tie plate 12 can be transferred to the top plate arch 11 and then to the side wall 51. In actual settings, a plurality of hanger plates 13 are arranged at intervals in the transverse direction, and each hanger plate 13 can be a vertical plate structure extending continuously in the longitudinal direction. However, it is obvious that in actual settings, the vertical plate structure extending in the longitudinal direction can also be replaced by a plurality of vertical plate units or hanging column structures arranged at intervals in the longitudinal direction, which can be optimized according to actual conditions.

[0062] Preferably, a plurality of suspension rods 16 are arranged between the horizontal tie plate 12 and the station hall floor 21, the top of which is connected to the horizontal tie plate 12, and the bottom is connected to the station hall floor 21, and the bottom is preferably embedded in the middle longitudinal beam 22. By setting up a plurality of suspension rods 16, the load-bearing of the station hall floor 21 can be transferred to the horizontal tie plate 12, and then transferred to the top arch 11 and even the side wall 51 through each suspension plate 13, thereby making full use of the characteristics of the arch structure with strong span and bearing capacity, so as to achieve the following: Figure 1 The arrangement of the platform layer structural columns 19 in the existing large-span platform station shown in the figure achieves the effect of a column-free platform space.

[0063] In actual setting, in order to ensure the reliability of force transmission of the suspension rod 16, its top passes through the horizontal tie plate 12 and is connected to the top plate arch 11. At the same time, the suspension rod 16 and the hanger plate 13 are preferably arranged correspondingly in the vertical direction, so that the suspension rod 16 passes through the upper part of the horizontal tie plate 12 and can be embedded in the hanger plate 13 and connected to the top plate arch 11 at the end. Obviously, a plurality of suspension rods 16 are arranged at intervals in the horizontal and longitudinal directions.

[0064] For the underground large-span platform column-free station in the preferred embodiment, the construction process is preferably as follows: Figures 3 to 10 As shown in, and specifically includes the following construction processes:

[0065] (1) Figure 3 As shown in FIG. 1 , anti-pullout piles 34 are constructed at the bottom of the construction pit of the underground station, and bottom longitudinal beams 33 are arranged corresponding to the tops of the anti-pullout piles 34 to form a plurality of bottom longitudinal beams 33 extending longitudinally and arranged at intervals in the transverse direction; then, a bottom plate 32 is constructed on the bottom longitudinal beams 33;

[0066] (2) Figure 4As shown in , a scaffold is set up above the completed bottom plate 32, and the side walls 51 are constructed upwards on both sides of the bottom plate 32 in the horizontal direction, and the middle longitudinal beam 22 and the station hall floor slab 21 are constructed at the designed position of the station hall floor slab 21, so that the middle longitudinal beam 22 and the station hall floor slab 21 extend longitudinally respectively, and the middle longitudinal beam 22 is arranged at the bottom of the station hall floor slab 21, and the two sides of the station hall floor slab 21 in the horizontal direction are connected to the side walls 51 respectively;

[0067] Preferably, when the middle longitudinal beam 22 and the station hall floor slab 21 are being constructed, the bottom connecting end of the suspension rod 16 is preferably embedded in the middle longitudinal beam 22 to prepare in advance for the installation of the suspension rod 16 after the construction. The bottom connecting end is arranged vertically and protrudes from the top surface of the station hall floor slab 21.

[0068] (3) Figure 5 As shown in the figure, a scaffold is set up on the completed station hall floor 21, and the construction of the lateral side walls 51 and the top plate arch 11 of the station structure is carried out, so that the arch feet of the top plate arch 11 are supported on the top of the side walls 51 respectively.

[0069] When the top arch 11 is constructed, it is preferred to reserve the top connection end of the suspension rod 16 in the top arch 11, which is arranged vertically, with the top connected to the top arch 11 and the bottom extending out of the inner wall surface of the top arch 11, for the subsequent arrangement of the suspension rod 16; at the same time, when the top arch 11 and the side wall 51 are constructed, the top of the side walls 51 on both sides are respectively pre-embedded with the balancing cable anchor end anchors 151, and the prestressed balancing cable 14 is connected to the balancing cable anchor end anchors 151, that is, after the side wall 51 and the top arch 11 are formed, the two ends of the prestressed balancing cable 14 have been pre-embedded and connected in the side wall 51. Of course, the connection end of the prestressed balancing cable 14 can also be reserved on each balancing cable anchor end anchor 151 to facilitate the subsequent connection of the prestressed balancing cable 14.

[0070] (4) Figure 6 As shown in FIG, a hanging plate 13 is constructed vertically below the top plate arch 11 using a hanging basket, and a connection end for connecting a hanging rod 16 is reserved at the bottom of the hanging plate 13 .

[0071] (5) Figure 7 As shown in , the horizontal tie plate 12 is constructed so that the lateral sides of the horizontal tie plate 12 are respectively connected to the setting positions of the arch foot, and the bottom of each hanging plate 13 is fixedly connected to the horizontal tie plate 12; accordingly, the prestressed balance cable 14 is correspondingly arranged in the horizontal tie plate 12, and the balance cable tensioning end anchor 152 is correspondingly arranged in the middle of the horizontal tie plate 12;

[0072] (6) Figure 8As shown in , tensioning of each prestressed balance cable 14 is performed, and corresponding hangers 16 are connected below the horizontal tie plate 12, so that the hangers 16 can transfer the weight of the station hall floor slab 21 to the top plate arch 11; thereafter, the scaffolding above the station hall floor slab 21 is removed to restore the space in the station hall layer;

[0073] (7) Fig. 9 As shown in the figure, the rail top air duct 23 at the bottom of the station hall floor 21 is constructed, and the platform floor 31 is set on the bottom plate 32; then, the scaffolding above the bottom plate 32 is removed to restore the space in the platform layer;

[0074] (8) Fig.10 As shown in , equipment pipelines 41 are set up above the horizontal tie plate 12 to complete the setting of the equipment pipeline layer; then, backfill the top of the top plate arch 11 to complete the construction of the underground large-span platform column-free station.

[0075] Of course, when constructing the vertical floors, it is also preferred to construct stairs and other common structures between the concourse floor and the platform floor, between the concourse floor and the equipment and pipeline floor, which will not be elaborated here.

[0076] For the underground large-span platform column-free station in the preferred embodiment of the present invention, the top plate 17 of the existing station top is set in the form of a top plate arch 11, thereby eliminating the need for a column-free station. Figure 1 The setting of the middle top longitudinal beam 18 simplifies the construction process to a certain extent, and the combination of the top plate arch and the horizontal tie plate also forms a corresponding accommodation space for equipment pipelines. There is no need to set up a corresponding equipment pipeline layer and a station hall ceiling 61 in the station hall layer, which reduces the setting height of the station hall layer and the buried depth of the station structure, and greatly reduces the construction volume of the project; at the same time, by utilizing the corresponding setting of the top plate arch 11, the hanging plate 13, the prestressed balance cable 14, and the hanger 16, and utilizing the characteristics of the arch structure's span and strong bearing capacity, the load-bearing capacity of the station hall floor 21 is effectively realized, and the structural columns 19 in the platform layer of the existing station are eliminated, achieving the effect of a column-free space on the platform layer, and improving the convenience of using the station.

[0077] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underground large-span platform column-free station structure, comprising oppositely arranged side walls, a bottom plate arranged between the bottoms of the two side walls, and a station hall floor plate arranged above the bottom plate; characterized in that: It also includes the top plate arch and horizontal tie plates; The horizontal tie plate is arranged above the station hall floor, and its two ends in the horizontal direction are respectively connected to the two side walls, and a plurality of balancing cable assemblies are arranged in the horizontal tie plate; the balancing cable assemblies include prestressed balancing cables arranged in pairs in the horizontal direction, and the ends of the two prestressed balancing cables that are separated from each other are respectively connected to the balancing cable anchoring end anchors in the corresponding side walls, and the other ends of the two prestressed balancing cables are overlapped in the middle of the horizontal tie plate and respectively matched with the corresponding balancing cable tensioning end anchors; The top plate arch is arranged above the horizontal tie plate, and its two ends are respectively connected to the tops of the two side walls, and a space for accommodating equipment pipelines is formed between the top plate arch and the horizontal tie plate; and a plurality of hanging plates are arranged between the top plate arch and the horizontal tie plate, the top of the hanging plates is connected to the top plate arch, and the bottom of the hanging plates is connected to the horizontal tie plate, so as to transfer the load on the horizontal tie plate to the top plate arch; A number of hangers are arranged between the horizontal tie plate and the station hall floor; the top of the hanger is connected to the horizontal tie plate, and the bottom of the hanger is connected to the station hall floor; the top of the hanger passes through the horizontal tie plate and vertically passes through the corresponding hanger plate and then is embedded in the top plate arch; a number of middle longitudinal beams extending longitudinally are arranged at the bottom of the station hall floor, and the bottom of the hanger is embedded in the middle longitudinal beam.

2. The underground large-span platform column-free station structure according to claim 1, wherein: The balancing cable components are multiple and arranged at intervals in the longitudinal direction.

3. The underground large-span platform column-free station structure according to claim 1 or 2, wherein: A plurality of bottom longitudinal beams extending in the longitudinal direction are arranged below the bottom plate, and a plurality of anti-pulling piles are arranged on at least one of the bottom longitudinal beams.

4. The underground large-span platform column-free station structure according to claim 1 or 2, wherein: At least one platform floor slab extending in the longitudinal direction is arranged on the bottom plate.

5. A construction method for an underground large-span platform column-free station structure, characterized in that: The construction process includes the following: (1) Construct a number of longitudinal bottom beams at the bottom of the construction pit of the underground station, and construct a bottom plate on the bottom beams so that the bottom plate and the bottom beams form an integral structure; (2) Scaffolding is set up above the base plate, and side walls are constructed upwards on both sides of the base plate, and the middle longitudinal beam and the concourse floor slab are constructed in sequence above the base plate corresponding to the design position of the concourse floor slab, so that the middle longitudinal beam and the concourse floor slab form an integral structure, and the two sides of the concourse floor slab are connected to the side walls respectively; (3) Scaffolding is set up on the floor slab of the station hall to carry out the construction of the top arch of the side walls on both sides and the top of the station structure, so that the arch feet of the top arch are supported on the top of the side walls respectively; at the same time, several anchor end anchors of the balancing rope are respectively set on the top of the two side walls; (4) constructing a hanging plate under the top plate arch using a hanging basket so that the top of the hanging plate is fixedly connected to the top plate arch and the bottom of the hanging plate hangs downward; (5) The horizontal tie plate is constructed so that its two sides are connected to the two side walls respectively and fixedly connected to the bottom of each hanger plate; at the same time, a prestressed balancing cable is correspondingly arranged in the horizontal tie plate, so that one end of the prestressed balancing cable is connected to the balancing cable anchoring end anchor on the corresponding side wall, and the other end extends horizontally to the middle of the horizontal tie plate and overlaps with the end of the prestressed balancing cable anchored on the other side wall, and the two overlapped ends of the prestressed balancing cable are respectively matched with the balancing cable tensioning end anchors arranged in the middle of the horizontal tie plate; When constructing the station hall floor, the bottom connection end of the hanger is preset at the corresponding position, and when constructing the horizontal tie plate, the top connection end of the hanger is preset in the horizontal tie plate, so that the bottom connection end and the corresponding top connection end are coaxially corresponding in the vertical direction; thereafter, a hanger is arranged between the horizontal tie plate and the station hall floor, so that the top of the hanger is connected to the top connection end, and the bottom of the hanger is connected to the corresponding bottom connection end, so that the load on the station hall floor can be transferred to the top plate arch through each hanger; (6) Tensioning of the prestressed balance cables, construction of supporting structures in underground stations, and installation of corresponding equipment pipelines between the horizontal tie plates and the top arch; (7) Remove the corresponding scaffolding and restore the space inside the underground station; then, backfill the top outer side of the top arch with soil to complete the construction of the underground large-span platform column-free station.

6. The construction method of the underground large-span platform column-free station structure according to claim 5, wherein: Before the bottom longitudinal beam construction, the pull-out piles were also constructed. The construction process is as follows: At the bottom longitudinal beam construction position, anti-pullout piles are constructed vertically downward, and a plurality of anti-pullout piles are arranged at intervals in the longitudinal direction of the same bottom longitudinal beam. During the subsequent bottom longitudinal beam construction, the tops of the anti-pullout piles are respectively connected to the corresponding bottom longitudinal beams.

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