Rectangular assembled subway station prefabricated side wall mounting structure

Abstract

The utility model discloses a rectangular assembly type subway station prefabricated side wall mounting structure, including bottom plate piece, first ring side wall piece and at least one ring subsequent side wall piece, first ring side wall piece and bottom plate piece are connected through one -way tenon mortise structure, and subsequent side wall piece is connected with bottom plate piece and the preceding ring side wall piece through two -way tenon mortise structure, and the water -facing surface middle part of first ring side wall piece and subsequent side wall piece is equipped with power transmission device, and the tension fixing assembly is established between first ring side wall piece and subsequent side wall piece and bottom plate piece. Through power transmission device, install and force in advance before the fastening of side wall piece, ensure that power transmission system establishes in time, in addition, tension fixing assembly is monitored in real time through stress sensor, and cooperate the reliable locking of special locking sleeve, and the overall bearing capacity of side wall structure and early stability are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of subway station side wall installation technology, specifically to a rectangular prefabricated subway station side wall installation structure. Background Technology

[0002] In the construction of prefabricated subway stations, the assembly of side walls is a crucial step. Currently, existing side wall assembly methods have several problems, such as difficulty in ensuring accuracy during assembly, the tendency for errors to occur and be difficult to eliminate; poor stability during lifting and transportation, posing safety hazards; and the risk of collisions with already installed side walls during subsequent assembly, affecting construction progress and quality. These problems lead to low construction efficiency and difficulty in effectively guaranteeing project quality. Utility Model Content To solve the above-mentioned technical problems, this utility model provides a rectangular prefabricated side wall installation structure for subway stations.

[0003] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rectangular prefabricated side wall installation structure for a subway station, including a bottom plate, a first ring of side wall blocks and at least one ring of subsequent side wall blocks; The first ring side wall block is connected to the bottom plate through a one-way tenon and mortise structure, and the subsequent side wall block is connected to the bottom plate and the previous ring side wall block through a two-way tenon and mortise structure. The first ring side wall block and the subsequent side wall block are each provided with a force transmission device in the middle of the water-facing surface, and the first ring side wall block and the subsequent side wall block are each provided with a tensioning and fixing assembly between them and the bottom plate.

[0004] Furthermore, the unidirectional tenon and mortise structure includes a first mortise located at the bottom of the first ring side wall block, and a first tenon located at the corresponding position of the bottom plate and adapted to the first mortise.

[0005] Furthermore, the bidirectional tenon and mortise structure includes a second mortise located at the bottom of the subsequent side wall block, a third mortise located on one side of the subsequent side wall block, a second tenon located on the bottom plate, and a third tenon located on the preceding ring side wall block; the second mortise and the second tenon are adapted to each other, and the third mortise and the third tenon are adapted to each other.

[0006] Furthermore, the force transmission device includes a force transmission screw, a rotating rod disposed on the force transmission screw, and a threaded cylinder that is threadedly engaged with the force transmission screw. The force transmission screw is installed in the middle of the water-facing surface of the side wall block, and the threaded cylinder is installed as a fixed end on the external enclosure structure.

[0007] Furthermore, the tensioning and fixing assembly includes threaded steel bars, a reaction frame locking component, a nut, and a locking sleeve; Tensioning holes are provided in the lower and middle parts of the first ring side wall block and the subsequent side wall block, respectively. The threaded steel bar is inserted into the tensioning hole, with one end connected to the reaction frame locking member and the other end self-locked by the nut. The locking sleeve is used to lock the threaded steel bar when the tension force reaches the design value.

[0008] Furthermore, the locking sleeve is provided with a hexagonal through hole and is adapted to the anchor head of the threaded steel bar.

[0009] Furthermore, the tensioning and fixing assembly also includes a stress sensor disposed within the sidewall block, the stress sensor being used to monitor the stress distribution during the tensioning process.

[0010] Furthermore, the top of the first ring side wall block is provided with a main lifting point, and the lower part of the side is provided with a secondary lifting point.

[0011] This utility model has the following beneficial effects: The rectangular prefabricated side wall installation structure for subway stations provided by this utility model effectively avoids the risks of tilting and swaying during the hoisting process through the coordinated operation of the main and auxiliary hoisting points, significantly improving construction safety. The first ring and subsequent side wall blocks adopt unidirectional and bidirectional tenon and mortise structures respectively, adapting to the stress requirements of different construction stages; the force transmission device is installed and stressed in advance before the side wall blocks are tightened, ensuring that the force transmission system is established in a timely manner; in addition, the tensioning and fixing components are monitored and dynamically adjusted in real time through stress sensors to avoid local stress concentration, and with the reliable locking of the special locking sleeve, the overall load-bearing capacity and early stability of the side wall structure are significantly improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the force transmission device structure in this utility model; Figure 3 This is a schematic diagram of the tensioning and fixing component structure in this utility model; Figures 1 to 3 The reference numerals in the attached drawings are respectively: 1-bottom plate, 20-force transmission device, 2-force transmission screw, 3-rotor rod, 4-threaded cylinder, 5-threaded steel, 6-reaction frame locking component, 7-locking sleeve. Detailed Implementation

[0013] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0014] like Figures 1 to 3As shown, a rectangular prefabricated side wall installation structure for a metro station includes a base plate 1, a first ring of side wall blocks, and at least one ring of subsequent side wall blocks. The first ring of side wall blocks is connected to the base plate 1 via a unidirectional tenon and mortise structure, and the subsequent side wall blocks are connected to the base plate 1 and the previous ring of side wall blocks via a bidirectional tenon and mortise structure. A force transmission device 20 is provided in the middle of the water-facing surface of both the first ring of side wall blocks and the subsequent side wall blocks, and a tensioning and fixing component is provided between the first ring of side wall blocks and the subsequent side wall blocks and the base plate 1.

[0015] The base plate 1 serves as the fundamental load-bearing component of the entire sidewall system, providing an installation reference surface for the first ring sidewall block and subsequent sidewall blocks. Vertical positioning is achieved through pre-designed tenon structures (first tenon, second tenon) that engage with the mortise and tenon joints of the sidewall blocks. Simultaneously, it bears the load transmitted by the sidewalls and distributes it to the foundation. The sidewall blocks are prefabricated sidewalls marked in the attached diagram. The first ring sidewall block, as the starting component of the sidewall system, precisely connects to the base plate 1 through a unidirectional tenon and mortise joint structure at its bottom. The force transmission device 20 in the middle of its water-facing surface transmits lateral forces to the diaphragm wall. The lifting points on the top and sides are designed to meet lifting requirements. The tensioning holes in the lower and middle sections, along with tensioning and fixing components, secure the block to the base plate 1, providing an assembly reference for subsequent sidewall blocks. Subsequent sidewall blocks are prefabricated components used to extend the length of the sidewalls. They connect to the base plate 1 via a two-way tenon and mortise structure at the bottom, and the mortises on the sides engage with the tenons of the previous ring of sidewall blocks, achieving dual positioning in both longitudinal and vertical directions. This not only continues the overall stress distribution of the sidewalls but also ensures stable connection with adjacent components and the base plate 1 through the force transmission device 20 and tensioning fixing components. The force transmission device 20 is installed in the middle of the water-facing side of the sidewall block, transmitting lateral force within a narrow groove (250mm) between the sidewall and the diaphragm wall. This establishes the stress system in advance, enhances the sidewall structure's resistance to lateral displacement, and prevents deformation caused by stress imbalance during assembly. The tensioning fixing components ensure a tight fit between the sidewall block and the base plate 1, as well as adjacent sidewall blocks, eliminating gaps and evenly distributing stress. Combined with bolt connections, this further enhances overall rigidity and prevents later settlement or displacement.

[0016] The force transmission device 20 is installed and subjected to force in the early stage of assembly, transferring the lateral load to the diaphragm wall in advance; the tensioning and fixing components use graded tensioning (pre-tensioning → final tensioning) to tightly connect the side wall blocks with the foundation and adjacent components, avoiding local stress concentration caused by rigid connection, and finally forming an integrated force system of "mortise and tenon positioning + tensioning and fastening + force transmission and dispersion", realizing the rapid installation and long-term stability of the prefabricated side wall.

[0017] In this embodiment, the unidirectional tenon and mortise structure includes a first mortise located at the bottom of the first ring side wall block and a first tenon located at the corresponding position on the bottom plate 1 and adapted to the first mortise. The first mortise, as the female connecting end, engages with the first tenon on the bottom plate 1 to achieve precise vertical positioning of the first ring side wall block and the bottom plate 1, limiting relative horizontal displacement and providing an initial reference for subsequent tensioning and fixing. The first tenon, adapted to the first mortise, serves as the male connecting end, physically connecting and transferring the vertical load of the first ring side wall block to the bottom plate 1, while simultaneously ensuring the verticality and planar position accuracy of the first ring side wall block during installation.

[0018] The bidirectional mortise and tenon structure includes a second mortise at the bottom of the subsequent side wall block, a third mortise on one side of the subsequent side wall block, a second tenon corresponding to the bottom plate 1, and a third tenon corresponding to the preceding ring side wall block. The second mortise and the second tenon are fitted together, and the third mortise and the third tenon are fitted together. The second mortise and the second tenon of the bottom plate 1 are fitted together, serving the same function as the first mortise and achieving vertical positioning and load transfer between the subsequent side wall block and the bottom plate 1, ensuring the vertical consistency of the multi-ring side walls. The third mortise and the third tenon of the preceding ring side wall block are fitted together, achieving longitudinal positioning between the subsequent side wall block and the preceding ring side wall block, limiting horizontal displacement between rings, and ensuring the overall straightness of the side wall. The second tenon and the second mortise and the first tenon are fitted together, serving the same function as the first tenon, providing a vertical installation reference and load transfer fulcrum for the subsequent side wall block. The third tenon and the third mortise and the third mortise and the third tenon are fitted together, serving as the male end for the inter-ring connection, ensuring a tight fit between adjacent side wall blocks through interlocking, and avoiding stress concentration caused by gaps between rings.

[0019] In this embodiment, the force transmission device 20 includes a force transmission screw 2, a rotating rod 3 mounted on the force transmission screw 2, and a threaded cylinder 4 threadedly engaged with the force transmission screw 2. The force transmission screw 2 is installed in the middle of the water-facing surface of the side wall block, and the threaded cylinder 4 is installed as a fixed end on the external enclosure structure. As the core force-bearing component of the force transmission device 20, the force transmission screw 2 is set along the middle of the water-facing surface of the side wall block. It transmits the force between the side wall block and the enclosure structure through its own axial extension and contraction, and transmits the lateral load (such as soil pressure and water pressure) on the side wall block to the external enclosure structure. At the same time, the spatial posture of the side wall block can be finely adjusted by length adjustment to ensure the precise docking of the side wall block with the bottom plate 1 and adjacent side wall blocks. The rotating rod 3 serves as the operating component, allowing construction workers to hold or rotate it using tools. Rotating the rod 3 drives the lead screw 2 to rotate around its axis, thus achieving axial extension and retraction of the screw. This facilitates quick adjustment of the lead screw 2's length within narrow spaces, such as a 250mm groove between a side wall and a diaphragm wall, adapting to the force requirements of different installation stages. The threaded cylinder 4 is threadedly engaged with the lead screw 2 and is pre-installed as a fixed end on the external enclosure structure, such as the diaphragm wall, providing a stable support foundation for the lead screw 2. Its inner thread matches the outer thread of the lead screw 2, achieving a rigid connection between the lead screw 2 and the enclosure structure through thread engagement. This ensures that the load transmitted by the lead screw 2 is reliably transferred to the enclosure structure, while also limiting the radial displacement of the lead screw 2 and guaranteeing the stability of the force transmission direction.

[0020] In this embodiment, the tensioning and fixing assembly includes a threaded steel bar 5, a reaction frame locking member 6, a nut, and a locking sleeve 7. Tensioning holes are provided in the lower and middle parts of the first ring side wall block and the subsequent side wall block, respectively. The threaded steel bar 5 passes through the tensioning hole, with one end connected to the reaction frame locking member 6 and the other end self-locking via the nut. The locking sleeve 7 is used to lock the threaded steel bar 5 when the tension force reaches the design value. The locking sleeve 7 has a hexagonal through hole and is adapted to the anchor head of the threaded steel bar 5.

[0021] The threaded steel bar 5, as the core load-bearing component for tensioning and fixing, passes through the tensioning holes in the lower and middle parts of the first ring side wall block and subsequent side wall blocks. Through axial tensioning, it generates preload, tightly connecting the side wall blocks to the bottom plate 1 and adjacent side wall blocks, transferring loads and offsetting deformations caused by external forces such as earth pressure and assembly stress, ensuring the overall rigidity of the structure. The reaction frame locking member 6 is connected to an external reaction device (such as a reaction frame) and serves as a load-bearing fulcrum during tensioning. During tensioning, the reaction frame locking member 6 bears the reverse tensile force of the threaded steel bar 5, providing stable support for the application of tension force, ensuring a reliable force transmission path during tensioning, and preventing tension force loss due to loosening of the fulcrum. The nut is fitted to the other end of the threaded steel bar 5, achieving a self-locking function through its threaded engagement with the threaded steel bar 5. This initially fixes the position of the threaded steel bar 5 before tensioning, preventing slippage during adjustment. During tensioning, the initial state of the tension force can be controlled by adjusting the tightness. Finally, it cooperates with the locking sleeve 7 to form a double fixation, enhancing the stability of the threaded steel bar 5's anchorage. The locking sleeve 7 is fitted onto the anchor head of the threaded steel bar 5 after the tension force reaches the design value, locking the threaded steel bar 5. Its internal structure is adapted to the anchor head of the threaded steel bar 5, limiting the axial displacement of the threaded steel bar 5 through mechanical engagement, preventing a decrease in tension force due to stress relaxation after tensioning, and ensuring the long-term stability of the fastening state between the side wall block and the bottom plate 1, as well as adjacent components. Tensioning holes are pre-set in the lower and middle parts of the side wall block, providing a passage for the threaded steel bar 5. Their positions match the corresponding structures of the bottom plate 1 and adjacent side wall blocks, ensuring that the threaded steel bar 5 can accurately transmit force to the key stress-bearing parts of the side wall block during tensioning, avoiding localized stress concentration.

[0022] In addition, the tensioning fixing assembly also includes stress sensors installed in the sidewall blocks, which are used to monitor the stress distribution during the tensioning process.

[0023] In addition, a main lifting point is located at the top of the first ring side wall block, and an auxiliary lifting point is located at the lower side. The main lifting point is the primary load-bearing point during the lifting phase, used to connect to the main hook of the gantry crane, and bears the main lifting load of the side wall block (such as the self-weight of the side wall block and additional forces during the lifting process). Its position is designed to match the center of gravity of the side wall block, ensuring that the balance of the side wall block can be initially controlled during the initial lifting, laying the foundation for subsequent attitude adjustments. The auxiliary lifting point connects to the auxiliary hook of the gantry crane, serving as an auxiliary load-bearing point to work in conjunction with the main lifting point. Its core function is to adjust the lifting attitude of the side wall block (such as tilt angle and verticality) through coordinated action with the main hook, preventing the side wall block from shaking or tilting violently due to the shift of the center of gravity during the lifting process, thus enhancing the lifting stability.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rectangular assembled subway station prefabricated side wall installation structure, characterized in that, Includes the bottom plate (1), the first ring side wall block and at least one ring of subsequent side wall blocks; The first ring side wall block and the bottom plate (1) are connected by a one-way tenon and mortise structure, and the subsequent side wall block is connected to the bottom plate (1) and the previous ring side wall block by a two-way tenon and mortise structure. The first ring side wall block and the subsequent side wall block are provided with force transmission devices (20) in the middle of the water-facing surface, and tensioning and fixing components are provided between the first ring side wall block and the subsequent side wall block and the bottom plate (1).

2. The rectangular assembled subway station prefabricated side wall mounting structure according to claim 1, characterized in that, The unidirectional tenon and mortise structure includes a first mortise located at the bottom of the first ring side wall block, and a first tenon located at the corresponding position of the bottom plate (1) and adapted to the first mortise.

3. The rectangular assembled subway station precast side wall installation structure according to claim 1, characterized in that, The bidirectional tenon and mortise structure includes a second tenon groove at the bottom of the subsequent side wall block, a third tenon groove on one side of the subsequent side wall block, a second tenon corresponding to the bottom plate (1), and a third tenon corresponding to the front ring side wall block; the second tenon groove is adapted to the second tenon groove, and the third tenon groove is adapted to the third tenon groove.

4. The rectangular assembled subway station precast side wall installation structure according to claim 1, characterized in that, The force transmission device (20) includes a force transmission screw (2), a rotating rod (3) set on the force transmission screw (2), and a threaded cylinder (4) that is threadedly engaged with the force transmission screw (2). The force transmission screw (2) is installed in the middle of the water-facing surface of the side wall block, and the threaded cylinder (4) is installed as a fixed end on the external enclosure structure.

5. The rectangular assembled subway station prefabricated side wall mounting structure according to claim 4, characterized in that, The tensioning and fixing assembly includes a threaded steel bar (5), a reaction frame locking component (6), a nut, and a locking sleeve (7). Tensioning holes are provided in the lower and middle parts of the first ring side wall block and the subsequent side wall block, respectively. The threaded steel (5) passes through the tensioning hole, one end of which is connected to the reaction frame locking member (6), and the other end is self-locked by the nut. The locking sleeve (7) is used to lock the threaded steel (5) when the tension force reaches the design value.

6. The rectangular assembled subway station prefabricated side wall mounting structure according to claim 5, characterized in that, The locking sleeve (7) is provided with a hexagonal through hole and is adapted to the anchor head of the threaded steel (5).

7. The rectangular assembled subway station precast side wall installation structure according to claim 4, characterized in that, The tensioning and fixing assembly also includes a stress sensor disposed within the sidewall block, which is used to monitor the stress distribution during the tensioning process.

8. The rectangular assembled subway station precast side wall installation structure according to claim 1, characterized in that, The top of the first ring side wall block is equipped with a main lifting point, and the lower part of the side is equipped with a secondary lifting point.

Images