An underground large-span cable-stayed structure system and its design method

Abstract

The present invention belongs to the technical field of underground structures, and specifically relates to an underground large-span space cable-stayed structure system, including an underground structure top plate, a bridge tower, a tensioning member and an anchor; the underground structure top plate is connected to the bridge tower through a tensioning member; one side of the bridge tower is connected to the underground structure top plate through a tensioning member; the bridge tower can be integrated with the ground building to form a ground landscape, and an entrance and exit space is provided on the side away from the underground structure top plate, the top of the entrance and exit space is connected to the ground, and the bottom is connected to the underground large-span space below the underground structure top plate. The present invention also provides a design method for the above-mentioned underground large-span space cable-stayed structure system. The present invention adopts a bridge tower, a tensioning member, an anchor and an underground structure top plate to form an underground large-span space cable-stayed structure system, and the soil cover load on the underground structure acting on the underground structure top plate is transmitted to the bridge tower through the tensioning member, and a force balance system is formed through the anchor to build an underground space with a larger span, so that the underground space appears more open.

Description

Technical Field

[0001] The invention belongs to the technical field of underground structures, and in particular relates to an underground large-span space cable-stayed structure system and a design method thereof. Background Art

[0002] Due to the natural isolation between underground space and ground space, there is insufficient natural lighting, lack of natural ventilation, excessive heat and humidity, and inherent deficiencies in the construction of spatial networks and artistic treatment techniques, which can easily lead to a feeling of oppression and closure, causing users to have an emotional tendency of "strangeness" and "distancing". Therefore, the future development of underground space can improve the comfort of underground space and expand the use function of underground space by integrating the ground and underground, building new structural systems such as large-span spaces, etc.

[0003] At present, underground structures used for large-span underground spaces mainly include flat-top orthogonal beam structures, folded plate structures, and arch structures. Flat-top orthogonal beam structures are more commonly used in China. If a flat-top orthogonal beam structure wants to achieve a larger span, it is necessary to increase the beam height, increase the depth of the underground project, affect the appearance of the underground project, and increase the project investment. At the same time, due to the limitations of the structural system itself, the span that the structure can achieve is very limited. The folded plate structure also has this problem, and the arch structure has certain requirements for the height of the arch. The larger the span, the greater the arch height needs to be. Therefore, it is necessary to provide an underground large-span space cable-stayed structure system and its design method to overcome the above problems. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an underground large-span cable-stayed structure system and a design method thereof, so as to enable the construction of an underground space with a larger span, making the underground space appear more open.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is an underground large-span cable-stayed structure system, comprising an underground structure top plate, a bridge tower and a tensioning member; bridge towers are arranged on opposite sides of the underground structure top plate; the bridge towers are connected to the underground structure top plate through tensioning members; an entrance and exit space is arranged on the side of the bridge tower away from the underground structure top plate, the top of the entrance and exit space is connected to the ground, and the bottom is connected to the underground large-span space below the underground structure top plate.

[0006] Furthermore, an anchor is provided on a side of the bridge tower facing away from the top plate of the underground structure, and the bridge tower is connected to the corresponding anchor via a tensioning member.

[0007] Furthermore, the bridge tower is integrated with the ground building to form a ground landscape, and an entrance and exit are provided inside, and the entrance and exit space is connected with the underground large-span space through the entrance and exit.

[0008] Furthermore, the bottom of the bridge tower is located in the soil layer below the underground structure.

[0009] Furthermore, the anchor is arranged in the soil layer on the side of the entrance and exit space away from the top plate of the underground structure.

[0010] Furthermore, the anchor is arranged separately or integrated with the underground structure.

[0011] Furthermore, the top plate of the underground structure is made of a steel plate concrete composite structure or an ultra-high performance concrete material.

[0012] Furthermore, the tensioning members on the bridge towers on both sides of the top plate of the underground structure are arranged symmetrically or asymmetrically.

[0013] Furthermore, the tensioning member is a pull cable or a pull rod.

[0014] The present invention also provides a design method for the above-mentioned underground large-span space cable-stayed structure system, comprising the following steps:

[0015] 1) According to planning requirements, determine the span of the underground structure top plate, the size of the entrance and exit space, and the thickness of the soil covering the underground structure on the underground structure top plate;

[0016] 2) According to the size of the entrance and exit space, the entrance and exit form and size of the bridge tower, the size and height of the bridge tower, the layout of the tensioning parts and the anchor design are designed, and the landscape design is integrated with the ground building or exit to integrate the bridge tower into the landmark and entrance and exit building system;

[0017] 3) Calculate the load of the soil covering the underground structure, design the structure of the bridge tower, the diameter of the tensioner, the form and size of the anchor, and ensure the safety of the entire cable-stayed structure system;

[0018] 4) Use steel plate concrete or ultra-high performance concrete to design the underground structure top plate and determine the connection method between the underground structure top plate and the tensioning parts.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention adopts a bridge tower, a tensioning member and an underground structure top plate to form an underground large-span cable-stayed structure system, and transmits the soil load on the underground structure acting on the underground structure top plate to the bridge tower through the tensioning member, so as to increase the structural span and build a larger span underground space, making the underground space appear more open, and saving materials at the same time;

[0021] (2) The present invention arranges anchors on the side of the bridge tower away from the top plate of the underground structure. When the bearing capacity is insufficient, the bridge tower is connected to the anchors through a tensioning member, so that the top plate of the underground structure, the bridge tower and the anchors form a force balance system, thereby improving the stability of the structure.

[0022] (3) The bridge tower of the present invention is provided with an entrance and exit connecting the entrance and exit space and the underground large-span space, so that the cable-stayed structure is integrated with the entrance and exit space to form a new underground large-span space that integrates the ground and underground. At the same time, it can also coordinate with the surrounding environment to form a landmark landscape on the surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an underground large-span cable-stayed structure system provided by an embodiment of the present invention;

[0024] In the figure: 1. bridge tower, 2. tensioning member, 3. anchor, 4. top plate of underground structure, 5. covering soil on underground structure, 6. entrance and exit space, 7. underground large-span space. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] 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 one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] like Figure 1As shown, an embodiment of the present invention provides an underground large-span space cable-stayed structure system, including an underground structure top plate 4, a bridge tower 1 and a tensioning member 2; bridge towers 1 are provided on opposite sides of the underground structure top plate 4; the bridge tower 1 is connected to the underground structure top plate 4 through the tensioning member 2; an entrance and exit space 6 is provided on the side of the bridge tower 1 away from the underground structure top plate 4, the top of the entrance and exit space 6 is connected to the ground, and the bottom is connected to the underground large-span space 7 below the underground structure top plate 4. This embodiment adopts the bridge tower 1, the tensioning member 2 and the underground structure top plate 4 to form an underground large-span space 7 cable-stayed structure system, and the load of the underground structure cover 5 acting on the underground structure top plate 4 is transmitted to the bridge tower 1 through the tensioning member 2, so as to increase the structural span, build a larger span underground space, make the underground space appear more open, and save materials at the same time.

[0029] Furthermore, an anchor 3 is provided on the side of the bridge tower 1 away from the underground structure top plate 4, and the bridge tower 1 is connected to the corresponding anchor 3 through a tension member 2. Figure 1 As shown, when the bearing capacity is insufficient, the bridge tower 1 is connected to the anchor 3 on the side of the bridge tower 1 away from the underground structure top plate 4 through the tensioning member 2, so that the underground structure top plate 4, the bridge tower 1 and the anchor 3 form a force balance system to improve the stability of the structure.

[0030] Furthermore, the bridge tower 1 can be integrated with the ground building to form a ground landscape, and an entrance and exit are provided inside, and the entrance and exit space 6 is connected with the underground large-span space 7 through the entrance and exit. The bridge tower 1 of this embodiment is a bridge tower-shaped or cylindrical structure with an opening in the middle. The opening serves as the entrance and exit for entering and exiting the underground large-span space 7, so that the cable-stayed structure is integrated with the entrance and exit space 6 to form a new underground large space that integrates the ground and the underground. The opening shape and size of the entrance and exit of the bridge tower 1 are determined by comprehensively considering the surrounding landscape requirements, the size of the entrance and exit space 6 and the structural safety requirements. At the same time, it should also be considered that the bridge tower 1 is coordinated with the surrounding environment to form a surface landmark landscape.

[0031] Furthermore, the bottom of the bridge tower 1 is located in the soil layer below the underground structure, which ensures the stability of the bridge tower 1 and improves the safety of the cable-stayed structure.

[0032] Furthermore, the anchor 3 is arranged in the soil layer on the side of the entrance and exit space 6 away from the underground structure top plate 4, for balancing the tension between the underground structure top plate 4 and the bridge tower 1. Furthermore, the anchor 3 is arranged alone or connected to the underground structure as a whole. Figure 1 As shown, the anchor 3 of this embodiment can be arranged separately in the soil layer below the rear of the entrance and exit space 6, or it can form an integral structure with the underground space. It is connected to the bridge tower 1 through cables or rods to balance the force between the bridge tower 1 and the top plate 4 of the underground structure.

[0033] Furthermore, the underground structure top plate 4 may be made of a composite structure such as steel plate concrete, or may be made of a new type of tensile material such as ultra-high performance concrete to reduce the thickness of the structure.

[0034] Furthermore, the tension members 2 on the bridge towers 1 on both sides of the underground structure top plate 4 are arranged symmetrically or asymmetrically. The tension members 2 are cables or rods. Figure 1 As shown, the bridge tower 1 of this embodiment is connected to the underground structure top plate 4 by multiple cables or rods, and the arrangement form can take into account the ground landscape and structural safety needs. The cables or rods are arranged symmetrically or asymmetrically between the two bridge towers 1 in a cable-stayed form. The number and strength of the cables or rods are determined according to the load design requirements, and they can be connected to the bridge tower 1 or the underground structure top plate 4 by mechanical or welding methods.

[0035] The design method of the underground large-span cable-stayed structure system provided in this embodiment includes the following steps:

[0036] 1) According to planning requirements, determine the span of the underground structure top plate 4, the size of the entrance and exit space 6, and the thickness of the covering soil 5 on the underground structure;

[0037] 2) According to the size of the entrance and exit space 6, the bridge tower 1 (including the opening form and size, the size and height of the bridge tower 1), the layout of the tensioning member 2 and the anchor 3 are designed, and the landscape design is integrated with the ground building or exit to integrate it into the landmark and entrance and exit building system to improve the aesthetics;

[0038] 3) With reference to the structural design specifications, calculate the loads such as the overburden 55 on the underground structure, and carry out structural design on the structure of the bridge tower 1, the cable diameter, and the form and size of the anchor 3 to ensure the safety of the entire cable-stayed structure system;

[0039] 4) According to relevant specifications, steel plate concrete or ultra-high performance concrete is used to design the underground structure top plate 4, and a reliable connection method is ensured between the underground structure top plate 4 and the tensioning member 2.

[0040] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An underground large-span cable-stayed structure system, characterized by: It comprises an underground structure top plate, a bridge tower, and a tensioning member; bridge towers are arranged on opposite sides of the underground structure top plate; the bridge towers are connected to the underground structure top plate through tensioning members; an entrance and exit space is arranged on the side of the bridge tower away from the underground structure top plate, the top of the entrance and exit space is connected to the ground, and the bottom is connected to the underground large-span space below the underground structure top plate; A cable-stayed structure system for an underground large-span space is formed by using a bridge tower, a tensioning member and an underground structure top plate, and the soil load on the underground structure acting on the underground structure top plate is transmitted to the bridge tower through the tensioning member, so as to increase the structural span, build an underground space with a larger span, and make the underground space appear more open; an anchor is provided on the side of the bridge tower away from the underground structure top plate, and the bridge tower is connected to the corresponding anchor through a tensioning member; when the bearing capacity is insufficient, the bridge tower is connected to the anchor on the side of the bridge tower away from the underground structure top plate through the tensioning member, so that the underground structure top plate, the bridge tower and the anchor form a force balance system; the bridge tower is integrated with the ground building to form a ground landscape, and an entrance and exit is provided inside, and the entrance and exit space is connected with the underground large-span space through the entrance and exit; the bridge tower is a bridge tower-shaped or cylindrical structure with an opening in the middle, and the opening serves as an entrance and exit for entering and exiting the underground large-span space, so that the cable-stayed structure is integrated with the entrance and exit space to form a large underground space that is integrated with the ground and underground.

2. The underground large-span cable-stayed structure system according to claim 1, characterized in that: The bottom of the pylon is located in the soil layer below the underground structure.

3. The underground large-span cable-stayed structure system according to claim 1, characterized in that: The anchor is arranged in the soil layer on the side of the entrance and exit space away from the top plate of the underground structure.

4. The underground large-span cable-stayed structure system according to claim 3, characterized in that: The anchors are arranged separately or integrated with the underground structure.

5. The underground large-span cable-stayed structure system according to claim 1, characterized in that: The underground structure top plate is made of a steel plate concrete composite structure or an ultra-high performance concrete material.

6. The underground large-span cable-stayed structure system according to claim 1, characterized in that: The tensioning members on the bridge towers on both sides of the top plate of the underground structure are arranged symmetrically or asymmetrically.

7. The underground large-span cable-stayed structure system according to claim 1, characterized in that: The tensioning member is a pull cable or a pull rod.

8. A design method for an underground large-span cable-stayed structure system according to any one of claims 1 to 7, characterized in that: The steps include: 1) According to planning requirements, determine the span of the underground structure top plate, the size of the entrance and exit space, and the thickness of the soil covering the underground structure on the underground structure top plate; 2) According to the size of the entrance and exit space, the entrance and exit form and size of the bridge tower, the size and height of the bridge tower, the layout of the tensioning parts and the anchor design are designed, and the landscape design is integrated with the ground building or exit to integrate the bridge tower into the landmark and entrance and exit building system; 3) Calculate the load of the soil covering the underground structure, design the structure of the bridge tower, the diameter of the tensioner, the form and size of the anchor, and ensure the safety of the entire cable-stayed structure system; 4) Use steel plate concrete or ultra-high performance concrete to design the underground structure top plate and determine the connection method between the underground structure top plate and the tensioning parts.

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