Sunken construction prefabricated assembly type underground garage

Abstract

The utility model provides a sinking construction prefabricated assembly type underground garage, relates to the technical field of assembly type buildings, and aims to solve the problems of large occupied area and complex construction of garages in the prior art. The sinking construction prefabricated assembly type underground garage comprises an open caisson support embedded underground and a multi-layer garage, each layer of garage comprises a plurality of vertical garages embedded underground, each vertical garage comprises a plurality of prefabricated garage units which are sequentially connected in the vertical direction, the multiple vertical garages are arranged around the periphery of the same foundation pit, and the inlet end of each prefabricated garage unit communicates with the foundation pit; a bottom plate used for parking vehicles is arranged between every two vertically adjacent layers of prefabricated garage units, and a blade angle structure is arranged at the bottom of the prefabricated garage unit on the bottommost layer. According to the underground garage, construction of the vertical garage can be conducted firstly, then construction of the foundation pit is conducted, the construction process is conducted step by step, the area of an operation area on the ground is reduced, and the influence on the surrounding environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, in particular to a prefabricated assembled underground garage with a sinking construction. Background Art

[0002] Urban underground parking lots can effectively alleviate the problem of parking difficulties in cities. However, at present, the civil construction of underground parking garages is mostly constructed by setting up foundation pit support systems in wet-cast operations and carrying out large-scale earth excavation. It not only takes up a large construction area in the construction site and wastes a lot of support materials, but also requires the stacking of a large number of formworks, steel bar processing and production areas, material stacking sites, mortar mixing areas and other sites at the construction site. After the excavation is completed, the support system needs to be dismantled to cause construction waste. During the construction period, there are problems such as noise nuisance and construction nuisance, and the requirements for safe and civilized construction are not easy to meet. At the same time, in areas with small urban sites, dense surrounding buildings and high parking demand, it is still impossible to build parking garages through large excavations, which has many deficiencies in the city appearance and residents' parking needs.

[0003] Patent document CN 115522568 A discloses an assembled steel sheet pile support annular underground garage and its construction method, including steel sheet piles, crown beams, ring supports, ground cover plates, prefabricated frame columns, lifting devices and ground parking pavilions, wherein a plurality of steel sheet piles are arranged as a circular structure sheet pile ring and embedded in the bottom of the flat ground, the inside of the circular structure sheet pile ring is hollowed out, the crown beam is arranged on the top of the steel sheet pile of the circular structure, the ring supports are arranged at intervals on the inner side of the steel sheet pile of the circular structure, the prefabricated frame columns are arranged on the inner side of the steel sheet piles and surround to form a circular structure frame column ring, the ground cover plates cover between the steel sheet piles and the prefabricated frame columns and are level with the ground, the lifting device is arranged in the circular structure of the circular structure, the ground parking pavilion is arranged on the top of the prefabricated frame columns of the circular structure, and a car placing device is arranged between the circular structure frame column ring and the circular structure sheet pile ring. During the construction of this underground garage, the steel sheet piles are firstly constructed to form a support for the garage foundation pit excavation, and after the foundation pit excavation is completed, the prefabricated columns are installed, and the parking lots and prefabricated columns of each floor are gradually installed from the bottom to the top. This type of underground garage construction method requires setting up a work area on the ground that is at least the size of the steel sheet pile diameter. The ground construction work area occupies a large area and is difficult to meet the construction needs of a small plot. Utility Model Content

[0004] The purpose of the utility model is to provide a prefabricated underground garage with a sunken construction to solve the problems in the prior art that the garage occupies a large area of ​​ground and is complex to construct. The prefabricated underground garage with a sunken construction of the utility model can reduce the area of ​​the working area on the ground and is suitable for the construction needs of relatively small plots.

[0005] The utility model provides a sunken prefabricated underground garage, comprising a plurality of vertical garages embedded in the ground, each of the vertical garages comprising a plurality of prefabricated garage units connected in sequence in the vertical direction, the plurality of vertical garages being arranged around the periphery of the same foundation pit and the entrance end of each of the prefabricated garage units being connected to the foundation pit, a bottom plate for parking vehicles being arranged between the prefabricated garage units of two adjacent upper and lower layers, and a blade angle structure being arranged at the bottom of the prefabricated garage unit of the lowest layer.

[0006] As a preferred solution of the utility model, the prefabricated garage unit includes a left prefabricated vertical wall, a right prefabricated vertical wall, a front prefabricated vertical wall and a rear prefabricated vertical wall. The left and right sides of the rear prefabricated vertical wall are fixedly connected to the left prefabricated vertical wall and the right prefabricated vertical wall through corner connectors, respectively. The left and right sides of the front prefabricated vertical wall are detachably connected to the left prefabricated vertical wall and the right prefabricated vertical wall through corner connectors, respectively. When the front prefabricated vertical wall is disassembled, the prefabricated garage unit forms its entrance end at the original front prefabricated vertical wall.

[0007] As a preferred solution of the present invention, the prefabricated garage unit also includes a middle crossbeam, which is connected to the middle of the left prefabricated vertical wall and the right prefabricated vertical wall at the top or bottom end of the prefabricated garage unit, and the bottom plate is arranged on the middle crossbeam.

[0008] As a preferred solution of the utility model, first embedded steel plates are provided on both the front and rear sides of the left prefabricated vertical wall and the right prefabricated vertical wall, second embedded steel plates are provided on both the left and right sides of the rear prefabricated vertical wall, one side of the corner connector is welded to the first embedded steel plate and the other side is welded to the second embedded steel plate, and the left and right sides of the front prefabricated vertical wall are detachably connected to the corner connectors on the front sides of the left prefabricated vertical wall and the right prefabricated vertical wall respectively by bolts.

[0009] As a preferred solution of the utility model, a vertical built-in sleeve is provided at the bottom end of the wall of the prefabricated garage unit on the upper layer, and a vertical prefabricated rib is provided at the top end of the wall of the prefabricated garage unit on the adjacent lower layer. When the prefabricated garage units on two adjacent layers are connected, the prefabricated rib is inserted into the built-in sleeve and slurry is poured into the built-in sleeve.

[0010] As a preferred solution of the utility model, a third embedded steel plate is arranged on the upper side or the lower side of the left prefabricated vertical wall and the right prefabricated vertical wall, the left and right ends of the middle cross beam are respectively welded to the third embedded steel plates on the left prefabricated vertical wall and the right prefabricated vertical wall, and corner connectors are arranged on the lower sides of the two ends of the middle cross beam, one side of the corner connector is connected to the middle cross beam and the other side is connected to the left prefabricated vertical wall or the right prefabricated vertical wall.

[0011] As a preferred solution of the utility model, when the front prefabricated vertical wall is dismantled, a front cross beam is arranged at the top or bottom end of the prefabricated garage unit, the corner connector connected to the original front prefabricated vertical wall is connected to the front cross beam, the front cross beam and the middle cross beam are arranged on the same horizontal plane, and the bottom plate is arranged on the front cross beam and the middle cross beam.

[0012] As a preferred solution of the utility model, the plurality of prefabricated garage units on each floor are arranged at intervals, and the entrance ends of the plurality of prefabricated garage units are connected by retaining steel plates.

[0013] As a preferred solution of the utility model, it also includes a lifting mechanism, which is vertically arranged in the foundation pit and connected to the multiple prefabricated garage units on each garage floor.

[0014] Compared with the prior art, the utility model has the following positive effects:

[0015] The utility model provides a prefabricated underground garage with sinking construction, multiple vertical garages embedded in the ground, each of which includes multiple prefabricated garage units connected in sequence in the vertical direction, multiple vertical garages are arranged around the periphery of the same foundation pit, and the entrance end of each prefabricated garage unit is connected to the foundation pit, a bottom plate for parking vehicles is arranged between the prefabricated garage units of the upper and lower adjacent layers, and a blade angle structure is arranged at the bottom of the prefabricated garage unit at the bottom. During the construction of the underground garage of the utility model, the prefabricated garage unit is first installed on the selected site, and then the soil excavation operation is carried out inside the prefabricated garage unit. Since the bottom of the prefabricated garage unit at the bottom is provided with a blade angle structure, the prefabricated garage unit will gradually sink as the soil excavation operation is carried out, and after sinking to a certain position, the upper prefabricated garage unit is installed. According to the above steps, the upper multiple prefabricated garage units are assembled and the soil excavation operation is carried out until the construction of the multi-layer prefabricated garage units in the same vertical direction is completed. In this way, multiple vertical garages are constructed and formed into a closed ring structure around multiple vertical garages, and then the soil is excavated layer by layer in the middle of the multiple vertical garages until the last layer, so as to complete the construction of the foundation pit. The underground garage of the utility model can first carry out the construction of the vertical garage and then the construction of the foundation pit. The construction process is carried out in steps. Compared with the traditional underground garage, which requires a large area of ​​excavation of the foundation pit and the construction of the garage in the foundation pit, the area of ​​the working area on the ground is reduced, and the impact on the surrounding environment is reduced. It is suitable for the construction needs of relatively small plots, and the construction is convenient and flexible, with a short construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a top view of the sunken prefabricated underground garage of the utility model when it is in a circular structure;

[0018] Figure 2 It is a top view of the sunken prefabricated underground garage of the utility model when it is in a rectangular structure;

[0019] Figure 3 It is a structural schematic diagram of the utility model of the prefabricated underground garage with a circular structure;

[0020] Figure 4 This is a schematic diagram of the connection structure of prefabricated garage units on different floors in the utility model;

[0021] Figure 5 It is a structural schematic diagram when the middle cross beam and the front cross beam in the utility model are arranged on the top of the prefabricated garage unit;

[0022] Figure 6 It is a structural schematic diagram when the middle cross beam and the front cross beam in the utility model are arranged at the bottom end of the prefabricated garage unit;

[0023] Figure 7 It is a schematic diagram of the connection structure between the rear prefabricated vertical wall and the left prefabricated vertical wall in the utility model;

[0024] Figure 8 It is a schematic diagram of the connection structure between the front prefabricated vertical wall and the left prefabricated vertical wall in the utility model;

[0025] Fig. 9 It is a schematic diagram of the connection structure between the middle cross beam and the left prefabricated vertical wall in the utility model.

[0026] In the figure: 1. Prefabricated garage unit; 11. Prefabricated vertical wall on the left; 111. First embedded steel plate; 112. Third embedded steel plate; 12. Prefabricated vertical wall on the right; 13. Prefabricated vertical wall on the front; 14. Prefabricated vertical wall on the rear; 141. Second embedded steel plate; 15. Middle cross beam; 151. Front cross beam; 152. Bottom plate; 16. Prefabricated ribs; 17. Built-in sleeve; 18. Corner connector; 19. Blade angle structure; 2. Foundation pit; 3. Retaining steel plate; 4. Lifting mechanism. DETAILED DESCRIPTION

[0027] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "front end", "back end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplification, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0030] Embodiment 1:

[0031] This embodiment provides a prefabricated underground garage with a sunken construction, such as Figure 1-Figure 3 As shown, it includes multiple vertical garages embedded in the ground, each vertical garage includes multiple prefabricated garage units 1 connected in sequence in the vertical direction, the multiple vertical garages are arranged around the outer periphery of the same foundation pit 2 and the entrance end of each prefabricated garage unit 1 is connected to the foundation pit 2, a bottom plate 152 for parking vehicles is arranged between the prefabricated garage units 1 on the upper and lower adjacent layers, and a blade angle structure 19 is arranged at the bottom of the prefabricated garage unit 1 on the bottom layer.

[0032] During the construction of the underground garage of this embodiment, the prefabricated garage unit 1 is first installed on the selected site, and then the soil excavation operation is carried out inside the prefabricated garage unit 1. Since the bottom of the prefabricated garage unit 1 at the bottom is provided with a blade structure 19, the prefabricated garage unit 1 will gradually sink as the soil excavation operation is carried out. After sinking to a certain position, the upper prefabricated garage unit 1 is installed. The upper multiple prefabricated garage units 1 are assembled and the soil excavation operation is carried out according to the above steps until the construction of the multi-layer prefabricated garage units 1 in the same vertical direction is completed. In this way, the construction of multiple vertical garages is completed, and multiple vertical garages are surrounded to form a closed ring structure, and then the soil excavation operation is carried out layer by layer in the middle of the multiple vertical garages until the last layer, thereby completing the construction of the foundation pit.

[0033] The underground garage of this embodiment can first carry out the construction of the vertical garage and then the construction of the foundation pit. The construction process is carried out in steps. Compared with the traditional underground garage, which requires a large-scale excavation of the foundation pit and the construction of the garage in the foundation pit, the area of ​​the working area on the ground is reduced, and the impact on the surrounding environment is reduced. It is suitable for the construction needs of relatively small plots, and the construction is convenient and flexible, with a short construction period.

[0034] Preferably, if Figure 1 and Figure 2 As shown, multiple vertical garages are arranged in a circular ring or a rectangular closed loop, and the foundation pit 2 is in a circular ring or a rectangular ring. The shape of the foundation pit 2 and the arrangement of multiple prefabricated garage units 1 can be adjusted according to the size characteristics of different plots to meet construction needs.

[0035] Preferably, if Figure 7 and Figure 8 As shown, the prefabricated garage unit 1 includes a left prefabricated vertical wall 11, a right prefabricated vertical wall 12, a front prefabricated vertical wall 13 and a rear prefabricated vertical wall 14. The left and right sides of the rear prefabricated vertical wall 14 are fixedly connected to the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 respectively through corner connectors 18. The left and right sides of the front prefabricated vertical wall 13 are detachably connected to the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 respectively through corner connectors 18, and when the front prefabricated vertical wall 13 is disassembled, the prefabricated garage unit 1 forms its entrance end at the original front prefabricated vertical wall 13. The blade angle structure 19 is arranged at the bottom ends of the left prefabricated vertical wall 11, the right prefabricated vertical wall 12, the front prefabricated vertical wall 13 and the rear prefabricated vertical wall 14 at the bottom layer.

[0036] During the sinking process of the prefabricated garage unit 1 in this embodiment, the left prefabricated vertical wall 11, the right prefabricated vertical wall 12, the front prefabricated vertical wall 13 and the rear prefabricated vertical wall 14 are connected to form a cavity which is closed on all sides and opened on the top and bottom, and soil excavation operations are carried out in the closed cavity. When the sinking of multiple vertical garages is completed and the construction of the foundation pit 2 is completed, the front prefabricated vertical wall 13 is removed from the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 one by one from the foundation pit 2, leaving the entrance end of the prefabricated garage unit 1, so that the foundation pit 2 is connected to the interior of the prefabricated garage unit 1.

[0037] Preferably, if Figure 1 and Figure 5 As shown, the prefabricated garage unit 1 further includes a middle crossbeam 15, which is connected to the middle of the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 at the top or bottom of the prefabricated garage unit 1, and the bottom plate 152 is arranged on the middle crossbeam 15. The middle crossbeam 15 connects the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12, making the structure of the prefabricated garage unit 1 more solid, and the middle crossbeam 15 plays a role of fixing and supporting the bottom plate 152.

[0038] Preferably, if Figure 7 and Figure 8 As shown, first embedded steel plates 111 are provided on both the front and rear sides of the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12, and second embedded steel plates 141 are provided on both the left and right sides of the rear prefabricated vertical wall 14. The first embedded steel plate 111 is welded on one side of the corner connector 18 and the second embedded steel plate 141 is welded on the other side, thereby connecting the rear prefabricated vertical wall 14 with the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12. Multiple corner connectors 18 can be provided in the vertical direction of the prefabricated garage unit 1, so that the four corners of the prefabricated garage unit 1 are more securely connected.

[0039] The left and right sides of the front prefabricated vertical wall 13 are detachably connected to the corner connectors 18 of the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 respectively by bolts. When the front prefabricated vertical wall 13 is disassembled, the bolts and nuts can be unscrewed, which is simple and convenient to operate.

[0040] Preferably, if Fig. 9 As shown, the bottom end of the wall of the upper prefabricated garage unit 1 is provided with a vertical built-in sleeve 17, and the top end of the wall of the adjacent lower prefabricated garage unit 1 is provided with a vertical prefabricated outgoing rib 16. When two adjacent prefabricated garage units 1 are connected, the prefabricated outgoing rib 16 is inserted into the built-in sleeve 17 and grout is poured into the built-in sleeve 17. A plurality of prefabricated outgoing ribs 16 and built-in sleeves 17 are provided on the left prefabricated vertical wall 11, the right prefabricated vertical wall 12, and the rear prefabricated vertical wall 14.

[0041] The built-in sleeve 17 includes a vertical section and a curved section, the vertical section extends to the bottom end of the wall of the prefabricated garage unit 1, and the curved section extends to the inner side of the wall of the prefabricated garage unit 1, and the slurry is poured into the built-in sleeve 17 from the curved section. The adjacent upper and lower prefabricated garage units 1 are connected by inserting the prefabricated ribs 16 into the built-in sleeve 17, and the connection method is simple and easy to operate.

[0042] Preferably, if Fig. 9 As shown, a third embedded steel plate 112 is provided on the upper side or the lower side of the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12, and the left and right ends of the middle crossbeam 15 are respectively welded to the third embedded steel plates 112 on the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12. The connection operation of the middle crossbeam 15 is simple and convenient. Angle connectors 18 are provided on the lower side of both ends of the middle crossbeam 15, one side of the corner connector 18 is connected to the middle crossbeam 15 and the other side is connected to the left prefabricated vertical wall 11 or the right prefabricated vertical wall 12. The corner connector 18 plays a role of further supporting and connecting the middle crossbeam 15, making the connection structure of the middle crossbeam 15 more stable. As shown in FIG. Fig. 9As shown, when the middle cross beam 15 is arranged at the bottom end of the prefabricated garage unit 1 , one side of the corner connector 18 is connected to the left prefabricated vertical wall or the right prefabricated vertical wall of the lower layer and the other side is connected to the lower side of the middle cross beam 15 .

[0043] Preferably, if Figure 5 or Figure 6 As shown, after the front prefabricated vertical wall 13 is disassembled, a front crossbeam 151 is arranged at the top or bottom of the prefabricated garage unit 1, and the corner connector 18 connected to the original front prefabricated vertical wall 13 is connected to the front crossbeam 151. The front crossbeam 151 and the middle crossbeam 15 are arranged on the same horizontal plane, and the bottom plate 152 is arranged on the front crossbeam 151 and the middle crossbeam 15. The front crossbeam 151 further supports and connects the bottom plate 152, so that the bottom plate 152 has a good load-bearing capacity.

[0044] like Figure 5 As shown, when the front cross beam 151 and the middle cross beam 15 are arranged at the top of the prefabricated garage unit 1, a bottom surface is arranged at the bottom of the prefabricated garage unit 1 at the bottom of the vertical garage to serve as the parking surface of the prefabricated garage unit 1 at the bottom. Figure 6 and Figure 3 As shown, when the front crossbeam 151 and the middle crossbeam 15 are arranged at the bottom end of the prefabricated garage unit 1, a cover plate is arranged on the top of the prefabricated garage unit 1 on the top side of the vertical garage. The cover plate can be flat or arched. The cover plate is used to cap the prefabricated garage unit 1 on the top side and bear the gravity of the upper soil layer.

[0045] Preferably, the multiple prefabricated garage units 1 on each floor are arranged at intervals, and the entrance ends of the multiple prefabricated garage units 1 are connected by retaining steel plates 3.

[0046] The side of the multiple prefabricated garage units 1 facing the foundation pit 2 is connected by a retaining steel plate 3. The retaining steel plate 3 plays a role of retaining soil, preventing the soil layer from collapsing into the foundation pit 2, and further improving the overall stability of the underground garage.

[0047] Preferably, the sunken prefabricated underground garage of this embodiment further includes a lifting mechanism 4, which is vertically arranged in the foundation pit 2 and connected to the plurality of prefabricated garage units 1 of each garage floor. The lifting mechanism can transfer the vehicle in the prefabricated garage unit 1 to the ground surface or transfer the vehicle on the ground to the prefabricated garage unit 1. The lifting mechanism 4 is installed in the foundation pit 2.

[0048] During the construction of the submerged prefabricated underground garage of this embodiment, first, the left prefabricated vertical wall 11, the right prefabricated vertical wall 12, the front prefabricated vertical wall 13 and the rear prefabricated vertical wall 14 are connected by corner connectors. Secondly, the middle crossbeam 15 is connected between the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 to assemble the first-floor prefabricated garage unit 1, which is also the lowest parking space of the vertical garage. Then, the soil excavation operation is carried out in the prefabricated garage unit 1. Since the bottom of the first-floor prefabricated garage unit 1 is a blade angle structure, the prefabricated garage unit 1 will gradually sink as the soil excavation operation is carried out, sinking to 20 centimeters above zero on the ground, and the upper prefabricated garage unit 1 is installed. The prefabricated outgoing reinforcement of the lower prefabricated wall is inserted into the built-in sleeve of the upper prefabricated wall, and the grouting material is grouted. After the grouting solidifies, the upper prefabricated garage unit 1 is assembled and the soil excavation operation is carried out according to the above steps until the vertical garage construction of the multi-layer prefabricated garage unit 1 is completed. The construction of multiple vertical garages is completed in sequence, and multiple vertical garages are surrounded to form a closed ring structure, and then the excavation is carried out layer by layer, and the adjacent vertical garages are connected in sequence through the retaining steel plate 3. When the excavation reaches the last layer, the bolts and nuts connecting the left prefabricated vertical wall 11 and the right prefabricated vertical wall 12 with the front prefabricated vertical wall 13 are loosened layer by layer, the front prefabricated vertical wall 13 is removed, and the front cross beam 151 is welded at the original position of the front prefabricated vertical wall 13. After all the front prefabricated vertical walls 13 are replaced with the front cross beam 151, horizontal plates are cast layer by layer from bottom to top on the front cross beam 151 and the middle cross beam 15 to form a bottom plate 152. After all the bottom plates 152 are cast, the construction of the underground garage is completed.

[0049] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make several modifications and improvements without departing from the creative concept of the present invention, which should be included in the protection scope of the present invention.

Claims

1. A prefabricated underground garage with sunken construction, characterized in that: It comprises a plurality of vertical garages embedded in the ground, each of the vertical garages comprising a plurality of prefabricated garage units (1) connected in sequence in the vertical direction, the plurality of vertical garages are arranged around the outer periphery of the same foundation pit (2) and the entrance end of each of the prefabricated garage units (1) is connected to the foundation pit (2), a bottom plate (152) for parking vehicles is arranged between the prefabricated garage units (1) on two adjacent upper and lower floors, and a blade angle structure (19) is arranged at the bottom of the prefabricated garage unit (1) on the lowest floor; The prefabricated garage unit (1) comprises a left prefabricated vertical wall (11), a right prefabricated vertical wall (12), a front prefabricated vertical wall (13) and a rear prefabricated vertical wall (14); the left and right sides of the rear prefabricated vertical wall (14) are respectively fixedly connected to the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12) via corner connectors (18); the left and right sides of the front prefabricated vertical wall (13) are respectively detachably connected to the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12) via corner connectors (18); when the front prefabricated vertical wall (13) is detached, the prefabricated garage unit (1) forms its entrance end at the original front prefabricated vertical wall (13).

2. The prefabricated underground garage constructed by sinking construction according to claim 1 is characterized in that: The prefabricated garage unit (1) further comprises a middle cross beam (15), wherein the middle cross beam (15) is connected to the middle of the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12) at the top or bottom end of the prefabricated garage unit (1), and the bottom plate (152) is arranged on the middle cross beam (15).

3. The prefabricated underground garage constructed by sinking construction according to claim 1 is characterized in that: First embedded steel plates (111) are provided on both the front and rear sides of the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12); second embedded steel plates (141) are provided on both the left and right sides of the rear prefabricated vertical wall (14); the first embedded steel plate (111) is welded on one side of the corner connector (18) and the second embedded steel plate (141) is welded on the other side; and the left and right sides of the front prefabricated vertical wall (13) are detachably connected to the corner connectors (18) on the front sides of the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12) respectively by bolts.

4. The prefabricated underground garage constructed by sinking construction according to claim 1 is characterized in that: A vertical built-in sleeve (17) is provided at the bottom end of the wall of the prefabricated garage unit (1) on the upper layer, and a vertical prefabricated rib (16) is provided at the top end of the wall of the prefabricated garage unit (1) on the adjacent lower layer. When the prefabricated garage units (1) on two adjacent layers are connected, the prefabricated rib (16) is inserted into the built-in sleeve (17) and grout is poured into the built-in sleeve (17).

5. The prefabricated underground garage constructed by sinking construction according to claim 2 is characterized in that: A third embedded steel plate (112) is arranged on the upper side or the lower side of the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12); the left and right ends of the middle cross beam (15) are respectively welded to the third embedded steel plates (112) on the left prefabricated vertical wall (11) and the right prefabricated vertical wall (12); corner connectors (18) are arranged on the lower side of the two ends of the middle cross beam (15); one side of the corner connector (18) is connected to the middle cross beam (15) and the other side is connected to the left prefabricated vertical wall (11) or the right prefabricated vertical wall (12).

6. The prefabricated underground garage constructed by sinking construction according to claim 2 is characterized in that: When the front prefabricated vertical wall (13) is disassembled, a front crossbeam (151) is arranged at the top or bottom of the prefabricated garage unit (1), the corner connector (18) connected to the original front prefabricated vertical wall (13) is connected to the front crossbeam (151), the front crossbeam (151) and the middle crossbeam (15) are arranged on the same horizontal plane, and the bottom plate (152) is arranged on the front crossbeam (151) and the middle crossbeam (15).

7. The prefabricated underground garage constructed by sinking construction according to claim 1 is characterized in that: The plurality of prefabricated garage units (1) on each floor are arranged at intervals, and the entrance ends of the plurality of prefabricated garage units (1) are connected via a retaining steel plate (3).

8. The prefabricated underground garage constructed by sinking construction according to claim 1 is characterized in that: It also comprises a lifting mechanism (4), wherein the lifting mechanism (4) is vertically arranged in the foundation pit (2) and is connected to the plurality of prefabricated garage units (1) on each garage floor.

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