Subway station steel supporting structure constructed through upside-down well wall method

Abstract

The utility model relates to the technical field of steel supports, in particular to a subway station steel support structure constructed through a well wall upside down hanging method. The steel supporting structure is connected with a lining grating steel frame of a station enclosure structure and comprises a plurality of I-shaped steel supporting assemblies and a pre-buried connecting steel plate, the pre-buried connecting steel plate is fixedly connected with the lining grating steel frame, and the I-shaped steel supporting assemblies are linearly arranged in an end-to-end connection mode. The I-shaped steel supporting assemblies close to the pre-buried connecting steel plate are connected with the pre-buried connecting steel plate. The structure is simple in process, high in work efficiency and convenient to dismantle subsequently, the prefabricated parts can be repeatedly used, cost is saved, energy is saved, and environment friendliness is achieved. The utility model is mainly applied to the aspect of subway station steel support structures constructed by an upside-down well wall method.

Description

Technical Field

[0001] The utility model relates to the technical field of steel supports, and more specifically, to a steel support structure for a subway station constructed by the inverted shaft wall method. Background Art

[0002] In the vast field of subway construction, for subway station projects with relatively superior surrounding rock conditions and relatively shallow burial depths, the engineering community generally tends to adopt the inverted shaft wall method as the construction strategy for the main structure, and in this process, an I-beam internal support system is widely used to strengthen the overall performance of the structure. This choice is based on the excellent bearing capacity and material stability of the I-beam, which plays an indispensable role in ensuring the strength, stiffness of the retaining structure, and the overall stability of the foundation pit. The stability of the retaining structure is directly related to the safety during the construction of the subway station and the reliability during subsequent operation. Therefore, the high-quality implementation of the I-beam support is one of the key factors for the success of the project.

[0003] However, despite the significant advantages of the I-beam support in subway station construction, the processes of processing, installing, and subsequent welding and reinforcement face various challenges. First of all, in terms of process complexity, the precise processing of the I-beam requires strict dimensional control and material treatment. During the installation process, precise positioning is required to match the design requirements. In addition, the welding and reinforcement steps are numerous and the weld quality needs to be ensured. This series of operations not only takes a long time but also greatly affects the construction efficiency, resulting in an increase in the overall cost.

[0004] The processing, installation, welding, and reinforcement processes of the I-beam support are relatively complex, time-consuming, with low work efficiency, high costs, a large amount of coordination work, and high-altitude operations are involved during the construction process. It is difficult to control the installation position deviation of the I-beam support, and the welding and reinforcement are difficult, and the construction risk coefficient is high. In view of the above-mentioned many problems, it is necessary to conduct in-depth research and improvement on the construction technology and process of the traditional I-beam support. Content of the Utility Model

[0005] In order to overcome the deficiencies in the above-mentioned prior art, the utility model provides a steel support structure for a subway station constructed by the inverted shaft wall method. This steel support structure can simplify the construction steps, shorten the construction period, reduce the cost, improve the safety, and optimize the overall construction efficiency.

[0006] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0007] A steel support structure for a subway station constructed by the inverted shaft wall method. The steel support structure is connected to the lining grid steel frame of the station enclosure structure, and includes an I-beam support assembly and a pre-embedded connection steel plate. The pre-embedded connection steel plate is fixedly connected to the lining grid steel frame. There are several groups of the I-beam support assemblies, and several groups of I-beam support assemblies are connected end to end and arranged in a straight line. The group of I-beam support assemblies close to the pre-embedded connection steel plate is connected to the pre-embedded connection steel plate.

[0008] Positioning angle steel brackets are fixedly arranged on both sides of the bottom of the pre-embedded connection steel plate. The positioning angle steel brackets are symmetrically arranged on both sides of the pre-embedded connection steel plate, and the positioning angle steel brackets are in an L-shaped plate structure.

[0009] Several anchor bars are horizontally arranged in the lining grid steel frame, and the pre-embedded connection steel plate is fixedly connected to the lining grid steel frame through the anchor bars.

[0010] Bolting holes are formed in the pre-embedded connection steel plate. A pre-embedded nut is fixedly arranged at the opening on the side of the bolting hole close to the lining grid steel frame. The pre-embedded nut is matched with the bolting hole, and the I-beam support assembly is connected to the pre-embedded nut through a positioning bolt.

[0011] The I-beam support assembly includes two prefabricated I-beam steel supports arranged side by side. Connection steel plates are fixedly connected to both ends of the two prefabricated I-beam steel supports. Connection holes are formed in the connection steel plates, and adjacent I-beam support assemblies are connected through high-strength bolts penetrating the connection holes.

[0012] Lacing plates are arranged on the upper and lower sides of the two prefabricated I-beam steel supports. The lacing plates are fixedly welded to the prefabricated I-beam steel supports, and the lacing plates are fixedly welded to the connection steel plates.

[0013] Multiple groups of steel plate diaphragms are arranged inside the I-beam support assembly, and multiple groups of steel plate diaphragms are arranged at equal distances inside the I-beam support assembly.

[0014] The upper and lower ends of the steel plate diaphragms are fixedly welded to the lacing plates, and the left and right ends of the steel plate diaphragms are fixedly welded to the inside of the prefabricated I-beam steel supports.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] Through the setting of embedded connecting steel plates, the connection stability between the I-beam support assembly and the lining grid steel frame is strengthened. At the same time, the number of embedded connecting steel plates can be determined based on the statistical analysis of the sizes of various types of steel supports in the station. The single-section sizes and quantities of the I-beam supports are divided and determined following the principle of fewer specifications and more combinations; the setting of anchor bars strengthens the connection strength between the embedded connecting steel plates and the lining grid steel frame; the setting of batten plates and steel plate diaphragms strengthens the structural strength of the combination of two prefabricated I-beam steel supports; the assembly of the I-beam supports uses bolt connection + seam welding, and connecting steel plates of different sizes and models can be used to freely adjust the length to offset construction errors; angle steel support plates are used for positioning and installation, bolts are perforated for fixation, and seam welding is used for reinforcement. This structure can determine the specific combination form of the I-beam supports according to different design requirements such as the forms and lengths of the prefabricated I-beam steel supports, connecting steel plates, and embedded connecting steel plates, so as to meet the steel support construction with different usage requirements. This structure has a simple process, high work efficiency, convenient subsequent demolition, and the prefabricated components can be reused, saving costs, energy, and being environmentally friendly. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural view of the present utility model;

[0018] Figure 2 is a schematic view of the connecting steel plate in the present utility model;

[0019] Figure 3 is a schematic view of the embedded connecting steel plate in the present utility model;

[0020] Figure 4 is a schematic cross-sectional view of the I-beam support assembly of the present utility model;

[0021] Figure 5 is a schematic view of the connection between adjacent I-beam support assemblies of the present utility model;

[0022] In the figure: 101 is the connecting steel plate, 102 is the positioning angle steel support plate, 103 is the prefabricated I-beam steel support, 104 is the lining grid steel frame, 105 is the high-strength bolt, 106 is the embedded nut, 107 is the anchor bar, 108 is the embedded connecting steel plate, 109 is the connecting hole, 110 is the batten plate, 111 is the steel plate diaphragm, 112 is the positioning bolt. Detailed Description of the Preferred Embodiments

[0023] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other manners different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0025] As Figures 1 to 5 shown, a steel support structure for a subway station constructed by the inverted shaft wall method, the steel support structure is connected to the lining grid steel frame 104 of the station enclosure structure, and includes an I-beam support assembly and a pre-embedded connecting steel plate 108. The pre-embedded connecting steel plate 108 is fixedly connected to the lining grid steel frame 104. There are several groups of I-beam support assemblies, and several groups of I-beam support assemblies are connected end to end and arranged in a straight line. The group of I-beam support assemblies close to the pre-embedded connecting steel plate 108 is connected to the pre-embedded connecting steel plate 108. The specific number of the pre-embedded connecting steel plates 108 can be determined according to the statistical analysis of the sizes of various types of steel supports for the station, eliminating construction errors, and the multiple pre-embedded connecting steel plates 108 are fixedly connected by welding.

[0026] Preferably, positioning angle steel brackets 102 are fixedly arranged on both sides of the bottom of the pre-embedded connecting steel plate 108. The positioning angle steel brackets 102 are symmetrically arranged on both sides of the pre-embedded connecting steel plate 108, and the positioning angle steel brackets 102 are in an L-shaped plate structure. The positioning angle steel brackets 102 reduce the construction difficulty and the construction risk coefficient, and improve the installation position accuracy control of the I-beam support assembly.

[0027] Preferably, several anchor bars 107 are horizontally arranged in the lining grid steel frame 104, and the pre-embedded connecting steel plate 108 is fixedly connected to the lining grid steel frame 104 through the anchor bars 107.

[0028] Preferably, bolt holes are formed in the pre-embedded connecting steel plate 108, and pre-embedded nuts 106 are fixedly arranged at the openings on the side of the bolt holes close to the lining grid steel frame 104. The pre-embedded nuts 106 are matched with the bolt holes, and the I-beam support assembly is connected to the pre-embedded nuts 106 through positioning bolts 112. The group of I-beam support assemblies close to the pre-embedded connecting steel plate 108 fixes the connecting steel plate 101 on the pre-embedded connecting steel plate 108 by means of connection through the positioning bolts 112 and the pre-embedded nuts 106.

[0029] Preferably, the I-beam support assembly includes two prefabricated I-beam steel supports 103 arranged side by side, and both ends of the two prefabricated I-beam steel supports 103 are fixedly connected with connecting steel plates 101, and the connecting steel plates 101 are provided with connecting holes 109. Adjacent I-beam support assemblies are connected by high-strength bolts 105 passing through the connecting holes 109. By pre-embedding the connecting steel plates 108 and the positioning angle steel support plates 102, the construction difficulty and construction risk factor are reduced, and the precision control of the installation position of the I-beam support assembly is improved. The prefabricated I-beam steel supports 103 are manufactured and formed in advance, which optimizes the construction process and shortens the construction period. The connecting steel plates 101 of various thicknesses can freely adjust the length of the I-beam support assembly, improve the density of the I-beam support assembly and the lining of the surrounding structure, and ensure the construction quality. The disassembled prefabricated I-beam steel supports 103 are simple to process and can be reused, saving costs, energy saving and environmental protection.

[0030] Preferably, gusset plates 110 are provided on the upper and lower sides of the two prefabricated I-beam steel supports 103, and the gusset plates 110 are welded to the prefabricated I-beam steel supports 103 and welded to the connecting steel plates 101. The central axis of the gusset plates 110 coincides with the symmetry axis of the two prefabricated I-beam steel supports 103.

[0031] Preferably, a plurality of sets of steel plate transverse partitions 111 are provided in the I-beam support assembly, and the plurality of sets of steel plate transverse partitions 111 are arranged at equal distances in the I-beam support assembly.

[0032] Preferably, the upper and lower ends of the steel plate transverse partition 111 are welded and fixed to the gusset plate 110 , and the left and right ends of the steel plate transverse partition 111 are welded and fixed to the inside of the prefabricated I-beam steel support 103 .

[0033] The construction process of this structure:

[0034] S101: Processing of connecting steel plate 101;

[0035] S102: Construction of embedded connecting steel plates 108 and positioning angle steel support plates 102;

[0036] S103: Fabrication of prefabricated I-beam support 103;

[0037] S104: splicing of prefabricated I-beam steel support 103;

[0038] S105: Installation and reinforcement of prefabricated I-beam steel support 103;

[0039] S106: Prefabricated I-beam steel support 103 will be dismantled later.

[0040] In the "installation and reinforcement construction of prefabricated I-beam steel support 103", the construction process is S201: erecting a scaffolding at a position below the prefabricated I-beam steel support 103 to be installed;

[0041] S202: Fix both sides of the prefabricated I-beam steel support 103 completed by splicing with sling and U-shaped snap rings, and set drag ropes with appropriate lengths at both ends of the prefabricated I-beam steel support 103;

[0042] S203: The hoisting wire rope of the hoisting and lifting equipment hoists the prefabricated I-beam steel support 103 to an appropriate position. The operator adjusts the specific position of the prefabricated I-beam steel support 103 through the drag rope within the safe operation space until the prefabricated I-beam steel support 103 is successfully placed on the positioning angle steel support plate 102;

[0043] S204: When the crane continues to bear force to ensure the stability of the prefabricated I-beam steel support 103, the operator measures the reserved construction error value between the prefabricated I-beam steel support 103 and the embedded connection steel plate 108 on the pre-erected scaffolding;

[0044] S205: Reasonably combine and install an appropriate number of embedded connection steel plates 108 to ensure that there is no gap between the prefabricated I-beam steel support 103 and the embedded connection steel plate 108;

[0045] S206: Use high-strength bolts 105 of M24×80 to tightly connect only the adjacent I-beam support components through the connection holes 109 reserved by each connection steel plate 101;

[0046] S207: Weld 108 around the four sides of each joint of each connection steel plate 101 to ensure the stability and effective force-bearing of the prefabricated I-beam steel support 103;

[0047] S208: Remove the slings, U-shaped snap rings and drag ropes on both sides of the steel support 103, disassemble the scaffolding to complete the installation of the prefabricated I-beam steel support 103.

[0048] First, connect the embedded connection steel plate 108 to the lining grid steel frame 104 of the retaining structure, and weld the positioning angle steel support plate 102 on the embedded connection steel plate 108; second, arrange the I-beam support components. Through the statistical analysis of the dimensions of various types of steel supports in the station, follow the principle of fewer specifications and more combinations to divide and determine the assembly quantity and single-section size of the I-beam support components. The assembly of the I-beam support components uses bolt connection plus seam welding, and the length of each type of connection steel plate 101 is freely adjusted to offset the construction error; the fixing adopts forms such as positioning with the positioning angle steel support plate 102 and fixing through the bolt 105 perforation. Finally, according to the design requirements such as different forms and lengths of the I-beam support components, determine the specific combination form of the I-beam support components so that it can meet the steel support construction with different usage requirements.

[0049] The above only elaborates in detail on the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A steel support structure for a subway station constructed by the inverted shaft wall method, the steel support structure is connected to the lining grid steel frame (104) of the station enclosure structure, and is characterized in that: It includes an I-beam support assembly and a pre-embedded connecting steel plate (108). The pre-embedded connecting steel plate (108) is fixedly connected to the lining grid steel frame (104). There are several groups of the I-beam support assemblies, and several groups of I-beam support assemblies are connected end to end and arranged in a straight line. The group of I-beam support assemblies close to the pre-embedded connecting steel plate (108) is connected to the pre-embedded connecting steel plate (108).

2. The steel support structure of the subway station constructed by the inverted shaft wall method according to claim 1, characterized in that: Positioning angle steel brackets (102) are fixedly arranged on both sides of the bottom of the pre-embedded connecting steel plate (108). The positioning angle steel brackets (102) are symmetrically arranged on both sides of the pre-embedded connecting steel plate (108), and the positioning angle steel brackets (102) are in an L-shaped plate structure.

3. The steel support structure of the subway station constructed by the inverted shaft wall method according to claim 2, wherein: Several anchor bars (107) are horizontally arranged in the lining grid steel frame (104). The pre-embedded connecting steel plate (108) is fixedly connected to the lining grid steel frame (104) through the anchor bars (107).

4. A steel support structure for a subway station constructed by the inverted shaft wall method according to claim 2, characterized in that: Bolting holes are formed in the pre-embedded connecting steel plate (108). A pre-embedded nut (106) is fixedly arranged at the opening on the side of the bolting hole close to the lining grid steel frame (104). The pre-embedded nut (106) is arranged to match the bolting hole. The I-beam support assembly is connected to the pre-embedded nut (106) through a positioning bolt (112).

5. The steel support structure of the subway station constructed by the inverted shaft wall method according to claim 4, characterized in that: The I-beam support assembly includes two prefabricated I-beam steel supports (103) arranged side by side. Connecting steel plates (101) are fixedly connected to both ends of the two prefabricated I-beam steel supports (103). Connecting holes (109) are formed in the connecting steel plates (101). Adjacent I-beam support assemblies are connected through high-strength bolts (105) passing through the connecting holes (109).

6. The steel support structure of the subway station constructed by the inverted shaft wall method according to claim 5, characterized in that: Lacing plates (110) are arranged on the upper and lower sides of the two prefabricated I-beam steel supports (103). The lacing plates (110) are fixedly welded to the prefabricated I-beam steel supports (103), and the lacing plates (110) are fixedly welded to the connecting steel plates (101).

7. The steel support structure of a subway station constructed by the inverted shaft wall method according to claim 6, wherein: Multiple groups of steel plate diaphragms (111) are arranged inside the I-beam support assembly. Multiple groups of the steel plate diaphragms (111) are arranged at equal distances inside the I-beam support assembly.

8. A steel support structure for a subway station constructed by the inverted well wall method according to claim 7, characterized in that: The upper and lower ends of the steel plate diaphragm (111) are fixedly welded to the lacing plate (110), and the left and right ends of the steel plate diaphragm (111) are fixedly welded to the inside of the prefabricated I-beam steel support (103).

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