A single-column and double-longitudinal-beam subway structure

Abstract

The present invention belongs to the field of subway engineering technology and relates to a single-column, double-longitudinal-beam subway structure, comprising a top plate, a middle plate, a bottom plate, and side walls. The top plate, middle plate, and bottom plate are sequentially erected between the two side walls from top to bottom and form a frame structure with the side walls. At least two top longitudinal beams are spaced apart on the top plate. The top longitudinal beams are arranged longitudinally along the subway line. Adjacent top longitudinal beams are connected by an upper flat arch structure, which is connected to the bottom plate via support columns. The present invention replaces double columns with a single column, reduces the width of the subway structure, and reduces the thickness and reinforcement of the top and bottom plates. It has excellent economic benefits. The use of the flat arch structure fully utilizes the compressive properties of concrete, ensuring both the structural force requirements and the clear height requirements of the station hall and platform levels.

Description

Technical Field

[0001] The present invention relates to the technical field of subway engineering, in particular to a single-column and double-longitudinal-beam subway structure. Background Art

[0002] With the in-depth development of urban rail transit and the continuous improvement of the national economy, the design concept of subway stations has gradually evolved from meeting travel needs to beautiful and comfortable landscape and cultural design, thus placing higher demands on the comfort of architectural space. At present, subway stations mainly adopt the frame + shear wall structure system; for the double-column three-span system, due to the two rows of columns set in the station hall and the middle of the platform, the visual obstruction of the entire subway space is relatively serious, which increases the sense of oppression in the space and reduces the comfort of passengers; the subway is a confined space with large passenger flow, and the double rows of columns are not conducive to the rapid evacuation of passengers; the setting of double rows of columns also brings certain inconveniences to passengers' walking; in addition, the current national high-quality development strategy requires the subway to carry out landscape and cultural design of architectural space without increasing the cost. The double rows of columns have many restrictive factors, which is not conducive to creating a good landscape and cultural space; if the arrangement of supporting columns is reduced on the basis of meeting the force requirements, it will greatly free up the architectural space.

[0003] A search revealed Chinese patent number CN106400833A, which discloses a single-column, double-longitudinal-beam subway structure, comprising a roof, side walls, and a floor. A middle plate is disposed between the side walls, and a middle longitudinal beam is disposed between the middle plates. The roof is located at the top of the side walls, and the floor is located at the bottom of the side walls. Two top longitudinal beams are disposed on the roof along the direction of the subway line, and a top cross beam is disposed between the two top longitudinal beams, the top longitudinal beam being perpendicular to the top cross beams. Two bottom longitudinal beams are disposed on the floor along the direction of the subway line, and a bottom cross beam is disposed between the two bottom longitudinal beams, the bottom longitudinal beam being perpendicular to the bottom cross beams. A column is disposed between the top and bottom cross beams. Using a single-column, double-longitudinal-beam subway structure, the span of the roof and floor is much smaller than that of a conventional single-column, double-span structure, reducing the thickness of the roof, floor, and side walls, and reducing the need for reinforcement in the structural cross section.

[0004] However, the above patents still have some shortcomings: 1. The crossbeam bears the load transmitted by the two spans. Due to the high water and soil pressure on the station floor, the crossbeam adopts a straight beam form, which is relatively large in size and reinforcement. The cost of the added crossbeam is high, which reduces the contribution to economic benefits; 2. The crossbeam and the column are connected by a single support point, which is in the form of a shoulder pole and is prone to instability. Especially under earthquake-resistant conditions, the subway, as a century-old project, should not allow such risks to exist. 3. Since the crossbeam is relatively high and the entire structure is solid concrete, the structure is bulky. If it is set below the top plate, it will occupy the space for the internal pipeline layout of the subway. Therefore, the crossbeam can only be flipped up above the top plate. However, more urban underground pipelines often need to be arranged above the top plate, which often causes conflicts and makes the solution unfeasible.

[0005] After searching, Chinese patent number CN113026814A discloses a single-column, double-longitudinal-beam subway structure, comprising a top plate, side walls, a bottom plate, a top longitudinal beam, a bottom longitudinal beam, a top cross beam, a bottom cross beam, a column, a middle longitudinal beam, a platform plate, and a middle plate. There are two top longitudinal beams, and shock-absorbing mechanisms are installed on the bottom walls of both top longitudinal beams. Shock-absorbing mechanisms are also installed on both sides of the top of the column. A first telescopic rod is installed between the two shock-absorbing mechanisms on the same side, and a second telescopic rod is installed between the middle of the first telescopic rod and the node between the top plate and the column. This patent prevents deformation or damage to the node by providing a shock-absorbing mechanism at the node between the top plate and the column. At the same time, an arched support plate is provided on the lower side of the middle plate, and a first spring is provided in combination to increase the bending resistance of the middle plate. It can also absorb the load and vibration transmitted from the middle plate, thereby achieving shock absorption and energy dissipation.

[0006] However, the above patents still have some shortcomings: 1. The crossbeam bears the load transmitted by the two spans. Due to the large water and soil pressure on the station floor, the crossbeam adopts a straight beam form, and the size and reinforcement will be relatively large. The cost of the added crossbeam is high, which reduces the contribution to economic benefits; 2. The shock-absorbing structure between the longitudinal beam and the support column may need to be replaced in the later stage, and the mechanical structure may have unreliable performance; 3. Since the crossbeam is relatively high and the entire structure is a solid concrete component, the structure is bulky. If it is set under the top plate, it will occupy the internal pipeline layout space of the subway, so the crossbeam can only be flipped up above the top plate, but more urban underground pipelines often need to be arranged above the top plate, and there are often conflicts, making the solution infeasible.

[0007] Therefore, the existing technical field is in urgent need of a single-column and double-longitudinal-beam subway structure that can improve economic efficiency. Summary of the Invention

[0008] The purpose of the present invention is to provide a single-column and double-longitudinal-beam subway structure to solve the problem in the prior art that the subway design is narrow and long, the underground building space occupies a large area, and the subway project costs are high.

[0009] The present invention provides a single-column and double-longitudinal-beam subway structure, comprising a top plate, a middle plate, a bottom plate and side walls. The top plate, middle plate and bottom plate are sequentially erected between the two side walls from top to bottom and form a frame structure with the side walls. At least two top longitudinal beams are arranged at intervals on the top plate. The top longitudinal beams are arranged longitudinally along the subway line. Two adjacent top longitudinal beams are connected by an upper flat arch structure, and the upper flat arch structure is connected to the bottom plate via a support column.

[0010] Furthermore, at least two bottom longitudinal beams are arranged at intervals on the bottom plate, and the bottom longitudinal beams are arranged longitudinally along the subway line. Two adjacent bottom longitudinal beams are connected by a lower tank arch structure, and two upper tank arch structures and lower tank arch structures that are diametrically opposed in the vertical direction are connected by the same support column.

[0011] Furthermore, the top transverse connecting beam is an arched structure with an opening facing upward, the two ends of the top transverse connecting beam are respectively connected to the two top longitudinal beams, and the upper end of the support column is connected to the middle part of the top transverse connecting beam.

[0012] Furthermore, the lower arch structure includes a bottom transverse connecting beam, which is an arch structure with an opening facing downward. The two ends of the bottom transverse connecting beam are respectively connected to the two bottom longitudinal beams, and the lower end of the support column is connected to the middle part of the bottom transverse connecting beam.

[0013] Furthermore, a top longitudinal connecting beam arranged along the longitudinal direction of the subway line is provided in the middle of the top transverse connecting beam, and the upper end of the support column is connected to the top longitudinal connecting beam.

[0014] Furthermore, a bottom longitudinal connecting beam arranged along the longitudinal direction of the subway line is provided in the middle of the bottom transverse connecting beam, and the lower end of the support column is connected to the bottom longitudinal connecting beam.

[0015] Furthermore, a plurality of platform plate columns are provided on the base plate, and the upper ends of the plurality of platform plate columns are commonly connected to the platform plate.

[0016] Furthermore, the highest point of the bottom cross connecting beam is lower than the upper surface of the platform plate.

[0017] Furthermore, a middle longitudinal beam is provided on the middle plate, the middle longitudinal beam is arranged along the longitudinal direction of the subway line, and the middle portion of the support column is fixedly connected to the middle longitudinal beam.

[0018] Furthermore, the top longitudinal beam, the middle longitudinal beam and the bottom longitudinal beam can all be installed in the form of turning up, turning down or a combination of the two.

[0019] The beneficial effects of the present invention are:

[0020] First, the single-column, dual-longitudinal-beam subway structure of the present invention features single columns in both the concourse and platform public areas, significantly freeing up subway space. This facilitates the rapid evacuation of passengers and reduces safety risks in confined spaces with large passenger flows. Furthermore, it creates a superior architectural spatial effect, facilitating landscape design, enhancing passenger comfort, reducing the sense of oppression, and improving the convenience of subway travel, meeting the national requirements for high-quality development.

[0021] Secondly, the single-column and double-longitudinal-beam subway structure of the present invention changes from a double column to a single column, which frees up space for the layout of equipment area rooms and allows for a more reasonable layout of the space, thereby meeting better functional requirements.

[0022] Third, the single-column and double-longitudinal-beam subway structure of the present invention adjusts the top and bottom plates from two spans to three spans, effectively reducing the structural span of the plate and the stress on the top and bottom plates, thereby reducing the plate thickness and reinforcement of the top and bottom plates. As the main large components of the subway structure, the top and bottom plates have formed good economic benefits, reduced a large amount of material consumption, and met the requirements of the country's dual-carbon strategy.

[0023] Fourthly, the present invention can reduce the platform width, thereby reducing the subway structure width. Under the condition of meeting the same functions, the project scale is reduced, and the project cost is further reduced, which has good economic benefits.

[0024] Fifth, the present invention adopts a single-column and double-longitudinal-beam subway structure, in which both the top and bottom transverse connecting beams adopt a flat arch structure, making full use of the compressive properties of concrete, ensuring the structural force requirements and meeting the net height requirements of the station hall and platform levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, other embodiments with the same technical features as the present invention can be obtained based on these drawings.

[0026] Figure 1 This is a structural schematic diagram of a first embodiment of a single-column and double-longitudinal-beam subway structure according to the present invention;

[0027] Figure 2 This is a structural schematic diagram of a second embodiment of a single-column and double-longitudinal-beam subway structure according to the present invention;

[0028] Figure 3 This is a structural schematic diagram of a third embodiment of the single-column and double-longitudinal-beam subway structure of the present invention.

[0029] Figure numerals: 1. Top plate; 2. Middle plate; 3. Bottom plate; 4. Side wall; 5. Top longitudinal beam; 6. Middle longitudinal beam; 7. Bottom longitudinal beam; 8. Support column; 9. Top transverse connecting beam; 10. Bottom transverse connecting beam; 11. Top longitudinal connecting beam; 12. Bottom longitudinal connecting beam; 13. Platform plate; 14. Platform plate column. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0032] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] Currently, urban subway stations are built underground. The top slab 1 typically has a soil cover thickness of 3.0m-4.5m. The top slab 1 and bottom slab 3 must withstand soil pressure, water pressure, ground vehicle loads, and the structural deadweight. The calculated loads on the top slab 1 and bottom slab 3 are generally 150kPa-230kPa, significantly greater than those on civil floor slabs. The calculated load on the station's center slab 2 is 4kPa, which is less. Given the heavy loads on the top slab 1 and bottom slab 3, a smaller span is recommended. Preliminary calculations suggest that the top slab 1 and bottom slab 3 should be adjusted from two spans to three, reducing the span to two-thirds of the original. The bending moment experienced by the structure is positively correlated with the square of the span, directly decreasing to 4 / 9. Therefore, reducing the bending moment by shortening the span is essential. However, existing three-span structures are typically implemented using double columns, and the addition of support columns 8 increases the public space occupied by the concourse and platform levels.

[0036] Based on the above, the present invention proposes a single-column and double-longitudinal-beam subway structure, which reduces the span by means of double-longitudinal-beam and single-column. Specifically, it includes a top plate 1, a middle plate 2, a bottom plate 3 and a side wall 4. The top plate 1, the middle plate 2 and the bottom plate 3 are sequentially erected between the two side walls 4 from top to bottom, and form a frame structure with the side walls 4. At least two top longitudinal beams 5 are arranged at intervals on the top plate 1. The top longitudinal beams 5 are arranged longitudinally along the subway line. The two adjacent top longitudinal beams 5 are connected by an upper arch structure, and the upper arch structure is connected to the bottom plate 3 through a support column 8.

[0037] Among them, the top plate 1 bears the covering soil load, the middle plate 2 bears the load of people and equipment, the bottom plate 3 bears the water buoyancy, and the two side walls 4 bear the horizontal water and soil loads. Among them, the thickness of the top plate 1, the middle plate 2, the bottom plate 3 and the two side walls 4 are determined according to calculations. The top plate 1, the middle plate 2, the bottom plate 3 and the two side walls 4 form an overall box-type structural system, which serves as a direct external load-bearing component.

[0038] Furthermore, at least two bottom longitudinal beams 7 are arranged at intervals on the bottom plate 3. The bottom longitudinal beams 7 are arranged longitudinally along the subway line. Two adjacent bottom longitudinal beams 7 are connected by a lower flat arch structure, and the two upper flat arch structures and the lower flat arch structure that are diametrically opposed in the vertical direction are connected by the same support column 8.

[0039] Based on the existing structure of the above-mentioned subway structure, one of the characteristics of the embodiment of the present invention is that the number of supporting columns 8 is reduced. Specifically: a single-column and double-longitudinal-beam subway structure is adopted, and the public areas of the station hall and platform levels are all single-columns. Compared with the double-column structure, the subway space is greatly released, forming a good architectural space effect. In addition, the change from double columns to single columns structurally reduces the visual obstruction and oppression of the underground space for the station, giving the largest space to passengers, reducing congestion, improving passengers' travel efficiency, and providing basic support for a comfortable landscape culture.

[0040] At the same time, the technical effect of changing the above-mentioned double columns to a single column also includes freeing up space for the layout of the equipment area room, which can make the space more reasonably arranged, thereby meeting better functional requirements.

[0041] The second feature of the embodiment of the present invention is that the structural span of the plate is reduced. Specifically: through the special structural form of a single column and double longitudinal beams, while keeping the number of support columns 8 unchanged, the top and bottom single column double span structure in the existing technology is adjusted to a single column three span structure, which effectively reduces the structural span of the plate and reduces the structural stress of the top and bottom plates 3, thereby reducing the plate thickness and reinforcement of the top plate 1 and the bottom plate 3. The top and bottom plates 3 serve as the main large components of the subway structure, forming good economic benefits.

[0042] In addition, for the structure that originally required double columns to bear the load, it is optimized into a single-column three-span system. This not only optimizes the thickness of the slab and releases building space, but also reduces the width of the station. While meeting the same function of double columns and three spans, it reduces the scale of the project and further reduces the project cost, which has good economic benefits. At the same time, it also meets the dual carbon policy and green design advocated by the country.

[0043] Specifically, the top transverse connecting beam 9 is an arched structure with an opening facing upward, the two ends of the top transverse connecting beam 9 are respectively connected to the two top longitudinal beams 5 , and the upper end of the support column 8 is connected to the middle of the top transverse connecting beam 9 .

[0044] The lower arch structure includes a bottom transverse connecting beam 10 , which is an arched structure with an opening facing downward. The two ends of the bottom transverse connecting beam 10 are respectively connected to the two bottom longitudinal beams 7 , and the lower end of the support column 8 is connected to the middle of the bottom transverse connecting beam 10 .

[0045] The above-mentioned top transverse connecting beam 9 and bottom transverse connecting beam 10 both adopt the arrangement of a flat arch structure. The upper flat arch structure and the lower flat arch structure form two flat arch structures of equal number that are arranged opposite to each other in an upper and lower direction. The compressive properties of concrete are fully utilized, which not only ensures the structural force requirements, but also meets the net height requirements of the station hall layer and the platform layer. It has good promotion value and industrialization prospects.

[0046] In order to increase the connection strength between the top transverse connecting beam 9, the bottom transverse connecting beam 10 and the support column 8, a top longitudinal connecting beam 11 arranged along the longitudinal direction of the subway line is provided in the middle of the top transverse connecting beam 9, and the upper end of the support column 8 is connected to the top longitudinal connecting beam 11.

[0047] A bottom longitudinal connecting beam 12 arranged longitudinally along the subway line is provided in the middle of the bottom transverse connecting beam 10 , and the lower end of the support column 8 is connected to the bottom longitudinal connecting beam 12 .

[0048] Furthermore, in order to improve the strength of the middle plate 2 , a middle longitudinal beam 6 is provided on the middle plate 2 . The middle longitudinal beam 6 is arranged along the longitudinal direction of the subway line, and the middle portion of the support column 8 is fixedly connected to the middle longitudinal beam 6 .

[0049] When it comes to the specific installation form, the top longitudinal beam 5, the middle longitudinal beam 6 and the bottom longitudinal beam 7 can all be installed in the form of turning up, turning down or a combination of the two.

[0050] In addition, a plurality of platform plate columns 14 are provided on the base plate 3 , the upper ends of the plurality of platform plate columns 14 are commonly connected to the platform plate 13 , and the highest point of the bottom cross beam 10 is lower than the upper surface of the platform plate 13 .

[0051] Compared with the single-column double-span structure in the prior art, the embodiment of the present invention also brings about the addition of an upper flat arch structure and a lower flat arch structure, but taking into account the comprehensive cost of the top plate 1 and the bottom plate 3, the cost of the top plate 1 and the bottom plate 3 can be saved by about 35%. As the main large components of the subway structure, the top plate 1 and the bottom plate 3 have a significant cost-saving effect on the entire subway structure. According to calculations, the span-reducing effect of the top plate 11 and the bottom plate 33 results in a cost saving of about 15% for the entire station. After years of development, the subway industry has matured its technology, and cost savings are already very difficult. In addition, the construction of subway stations is expensive, with one subway station costing about 200 million yuan. The cost savings are about 30 million yuan. For a subway project with 30 stations, the cost savings are about 900 million yuan, with considerable economic benefits. Therefore, for stations that originally required double columns and three spans to meet the force requirements, in this embodiment, the platform is cleverly converted from double columns to single columns. While meeting the effective platform width, the station width can be shortened, thereby further reducing investment. In this embodiment, the force conversion system is hidden within the suspended ceiling and below the platform slab, which has no space requirements, while the public areas and equipment areas of the station, which have strong space requirements, are set to single columns, effectively reducing the public space occupied by the station hall and platform levels, thereby achieving better functional effects.

[0052] Specifically, the number of support columns 8 and the flat arches can be adaptively adjusted according to the actual span requirements. The present invention provides the following specific implementation methods:

[0053] Example 1:

[0054] like Figure 1As shown, a single-column and double-longitudinal-beam subway structure is shown, comprising a top plate 1, a middle plate 2, a bottom plate 3 and side walls 4. The top plate 1, the middle plate 2 and the bottom plate 3 are sequentially erected between the two side walls 4 from top to bottom, and form a frame structure with the side walls 4. Two top longitudinal beams 5 are arranged at intervals on the top plate 1 in an upturned manner. The top longitudinal beams 5 are arranged longitudinally along the subway line. The two top longitudinal beams 5 are connected by an upper tank arch structure, and the upper tank arch structure is connected to the bottom plate 3 through a support column 8; two bottom longitudinal beams 7 are arranged at intervals on the bottom plate 3 in an upturned manner. The bottom longitudinal beams 7 are arranged longitudinally along the subway line. The two bottom longitudinal beams 7 are connected by a lower tank arch structure. The two upper tank arch structures and the lower tank arch structure that are diametrically opposed in the vertical direction are connected by the same support column 8.

[0055] The top transverse connecting beam 9 is an arched structure with an opening facing upward, and the two ends of the top transverse connecting beam 9 are respectively connected to the two top longitudinal beams 5, and the upper end of the support column 8 is connected to the middle part of the top transverse connecting beam 9; the lower arch structure includes a bottom transverse connecting beam 10, and the bottom transverse connecting beam 10 is an arched structure with an opening facing downward, and the two ends of the bottom transverse connecting beam 10 are respectively connected to the two bottom longitudinal beams 7, and the lower end of the support column 8 is connected to the middle part of the bottom transverse connecting beam 10.

[0056] A top longitudinal connecting beam 11 arranged along the longitudinal direction of the subway line is provided in the middle part of the top transverse connecting beam 9, the upper end of the support column 8 is connected to the top longitudinal connecting beam 11, and a bottom longitudinal connecting beam 12 arranged along the longitudinal direction of the subway line is provided in the middle part of the bottom transverse connecting beam 10, the lower end of the support column 8 is connected to the bottom longitudinal connecting beam 12, a plurality of platform plate columns 14 are provided on the bottom plate 3, and the upper ends of the plurality of platform plate columns 14 are commonly connected to the platform plate 13, the highest point of the bottom transverse connecting beam 10 is lower than the upper surface of the platform plate 13, and a middle longitudinal beam 6 is provided on the middle plate 2 in a downwardly turned form, the middle longitudinal beam 6 is arranged along the longitudinal direction of the subway line, and the middle part of the support column 8 is fixedly connected to the middle longitudinal beam 6.

[0057] Example 2:

[0058] like Figure 2As shown, a double-column and three-longitudinal-beam subway structure is shown, comprising a top plate 1, a middle plate 2, a bottom plate 3 and side walls 4. The top plate 1, the middle plate 2 and the bottom plate 3 are sequentially erected between the two side walls 4 from top to bottom, and form a frame structure with the side walls 4. Three top longitudinal beams 5 are arranged at intervals on the top plate 1 in an upturned manner. The top longitudinal beams 5 are arranged longitudinally along the subway line, and two adjacent top longitudinal beams 5 are connected by an upper tank arch structure, and the upper tank arch structure is connected to the bottom plate 3 through a support column 8; three bottom longitudinal beams 7 are arranged at intervals on the bottom plate 3 in an upturned manner, and the bottom longitudinal beams 7 are arranged longitudinally along the subway line, and two adjacent bottom longitudinal beams 7 are connected by a lower tank arch structure. The two upper tank arch structures and the lower tank arch structure that are diametrically opposed in the vertical direction are connected by the same support column 8.

[0059] The top transverse connecting beam 9 is an arched structure with an opening facing upward, and the two ends of the top transverse connecting beam 9 are respectively connected to the two top longitudinal beams 5, and the upper end of the support column 8 is connected to the middle part of the top transverse connecting beam 9; the lower arch structure includes a bottom transverse connecting beam 10, and the bottom transverse connecting beam 10 is an arched structure with an opening facing downward, and the two ends of the bottom transverse connecting beam 10 are respectively connected to the two bottom longitudinal beams 7, and the lower end of the support column 8 is connected to the middle part of the bottom transverse connecting beam 10.

[0060] A top longitudinal connecting beam 11 arranged along the longitudinal direction of the subway line is provided in the middle part of the top transverse connecting beam 9, the upper end of the support column 8 is connected to the top longitudinal connecting beam 11, and a bottom longitudinal connecting beam 12 arranged along the longitudinal direction of the subway line is provided in the middle part of the bottom transverse connecting beam 10, the lower end of the support column 8 is connected to the bottom longitudinal connecting beam 12, a plurality of platform plate columns 14 are provided on the bottom plate 3, and the upper ends of the plurality of platform plate columns 14 are commonly connected to the platform plate 13, the highest point of the bottom transverse connecting beam 10 is lower than the upper surface of the platform plate 13, and a middle longitudinal beam 6 is provided on the middle plate 2 in a downwardly turned form, the middle longitudinal beam 6 is arranged along the longitudinal direction of the subway line, and the middle part of the support column 8 is fixedly connected to the middle longitudinal beam 6.

[0061] Example 3:

[0062] like Figure 3As shown, a double-column and four-longitudinal-beam subway structure is shown, comprising a top plate 1, a middle plate 2, a bottom plate 3 and side walls 4. The top plate 1, the middle plate 2 and the bottom plate 3 are sequentially erected between the two side walls 4 from top to bottom, and form a frame structure with the side walls 4. Four top longitudinal beams 5 are arranged at intervals on the top plate 1 in an upturned manner. The top longitudinal beams 5 are arranged longitudinally along the subway line, and every two top longitudinal beams 5 are connected by an upper tank arch structure, and the upper tank arch structure is connected to the bottom plate 3 through a support column 8; four bottom longitudinal beams 7 are arranged at intervals on the bottom plate 3 in an upturned manner, and the bottom longitudinal beams 7 are arranged longitudinally along the subway line, and every two bottom longitudinal beams 7 are connected by a lower tank arch structure. The two upper tank arch structures and the lower tank arch structure that are diametrically opposed in the vertical direction are connected by the same support column 8.

[0063] The top transverse connecting beam 9 is an arched structure with an opening facing upward, and the two ends of the top transverse connecting beam 9 are respectively connected to the two top longitudinal beams 5, and the upper end of the support column 8 is connected to the middle part of the top transverse connecting beam 9; the lower arch structure includes a bottom transverse connecting beam 10, and the bottom transverse connecting beam 10 is an arched structure with an opening facing downward, and the two ends of the bottom transverse connecting beam 10 are respectively connected to the two bottom longitudinal beams 7, and the lower end of the support column 8 is connected to the middle part of the bottom transverse connecting beam 10.

[0064] A top longitudinal connecting beam 11 arranged along the longitudinal direction of the subway line is provided in the middle part of the top transverse connecting beam 9, the upper end of the support column 8 is connected to the top longitudinal connecting beam 11, and a bottom longitudinal connecting beam 12 arranged along the longitudinal direction of the subway line is provided in the middle part of the bottom transverse connecting beam 10, the lower end of the support column 8 is connected to the bottom longitudinal connecting beam 12, a plurality of platform plate columns 14 are provided on the bottom plate 3, and the upper ends of the plurality of platform plate columns 14 are commonly connected to the platform plate 13, the highest point of the bottom transverse connecting beam 10 is lower than the upper surface of the platform plate 13, and a middle longitudinal beam 6 is provided on the middle plate 2 in a downwardly turned form, the middle longitudinal beam 6 is arranged along the longitudinal direction of the subway line, and the middle part of the support column 8 is fixedly connected to the middle longitudinal beam 6.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-column and double-longitudinal-beam subway structure, characterized by: The utility model comprises a top plate (1), a middle plate (2), a bottom plate (3) and side walls (4), wherein the top plate (1), the middle plate (2) and the bottom plate (3) are sequentially erected between the two side walls (4) from top to bottom and form a frame structure with the side walls (4); at least two top longitudinal beams (5) are arranged at intervals on the top plate (1); the top longitudinal beams (5) are arranged longitudinally along the subway line; two adjacent top longitudinal beams (5) are connected by an upper arch structure, and the upper arch structure is connected to the bottom plate (3) through a support column (8); At least two bottom longitudinal beams (7) are arranged at intervals on the bottom plate (3), the bottom longitudinal beams (7) are arranged longitudinally along the subway line, two adjacent bottom longitudinal beams (7) are connected by a lower tank arch structure, and two upper tank arch structures and a lower tank arch structure that are opposite to each other in the vertical direction are connected by the same support column (8); The upper arch structure comprises a top transverse connecting beam (9), the top transverse connecting beam (9) is an arch structure with an opening facing upward, the two ends of the top transverse connecting beam (9) are respectively connected to the two top longitudinal beams (5), and the upper end of the support column (8) is connected to the middle of the top transverse connecting beam (9).

2. The single-column and double-longitudinal-beam subway structure according to claim 1, characterized in that: The lower flat arch structure comprises a bottom transverse connecting beam (10), the bottom transverse connecting beam (10) is an arched structure with an opening facing downward, the two ends of the bottom transverse connecting beam (10) are respectively connected to the two bottom longitudinal beams (7), and the lower end of the support column (8) is connected to the middle of the bottom transverse connecting beam (10).

3. The single-column and double-longitudinal-beam subway structure according to claim 1, characterized in that: A top longitudinal connecting beam (11) arranged longitudinally along the subway line is provided in the middle of the top transverse connecting beam (9), and the upper end of the support column (8) is connected to the top longitudinal connecting beam (11).

4. The single-column and double-longitudinal-beam subway structure according to claim 2, characterized in that: A bottom longitudinal connecting beam (12) arranged longitudinally along the subway line is provided in the middle of the bottom transverse connecting beam (10), and the lower end of the support column (8) is connected to the bottom longitudinal connecting beam (12).

5. The single-column and double-longitudinal-beam subway structure according to claim 2, characterized in that: A plurality of platform plate columns (14) are provided on the bottom plate, and the upper ends of the plurality of platform plate columns (14) are commonly connected to the platform plate (13).

6. The single-column and double-longitudinal-beam subway structure according to claim 5, characterized in that: The highest point of the bottom cross beam (10) is lower than the upper surface of the platform plate (13).

7. The single-column and double-longitudinal-beam subway structure according to claim 1, characterized in that: A middle longitudinal beam (6) is provided on the middle plate (2), the middle longitudinal beam (6) is arranged along the longitudinal direction of the subway line, and the middle portion of the support column (8) is fixedly connected to the middle longitudinal beam (6).

8. The single-column and double-longitudinal-beam subway structure according to claim 7, characterized in that: The top longitudinal beam (5), the middle longitudinal beam (6) and the bottom longitudinal beam (7) are installed in an upward-turning, downward-turning or a combination of the two.

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