A long and narrow garage roof drainage structure and a construction method thereof

Abstract

The application discloses a long and narrow garage roof drainage structure, which comprises a drainage groove, a four-way joint, a drainage plate, a gas-permeable observation tube, a siphon pipe, a sediment observation well, a water collecting pool and an inspection well.

Description

Technical Field

[0001] This invention relates to the field of building construction, and in particular to a drainage structure for a narrow garage roof and its construction method. Background Technology

[0002] With the continuous development and improvement of my country's building waterproofing construction technology and processes, traditional garage roof waterproofing construction methods have become outdated and obsolete. The commonly used roof drainage construction method is to allow rainwater to flow out to the edge of the garage roof through a slope layer. This construction method requires a slope layer construction, which takes a long time. Moreover, the span of garage roofs is generally large, and the slope layer will be very thick in the middle, which increases the construction cost.

[0003] Chinese patent CN204326390U discloses a garage roof drainage system, including a water collection well, multiple drainage boards, and multiple drainage channels for collecting rainwater on the drainage boards. The multiple drainage channels and multiple drainage boards are all arranged between the garage roof and the planting soil layer. The drainage channels are arranged between two adjacent drainage boards. The drainage channels have inlet channels for rainwater on the drainage boards to enter. The drainage channels are connected to the water collection well through siphon pipes. A waterproof layer is provided between the drainage boards and the garage roof.

[0004] In the construction of drainage systems in related technologies, the drainage channel is usually placed upside down on the garage roof slab, and then the garage roof slab is heated with a hot air welding gun. The drainage board is then glued to the garage roof slab. This construction method is relatively cumbersome and cannot guarantee a stable connection between the drainage board and the drainage channel, so it needs to be improved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a drainage structure for narrow garage roof slabs that facilitates construction and secure connections.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a drainage structure for a narrow garage roof slab, comprising:

[0007] Drainage channels, laid upside down in a grid pattern in the shape of horizontal and vertical lines, are installed on the garage roof slab.

[0008] A four-way connector is provided between the ends of the drainage channel and is inserted into the drainage channel;

[0009] A drainage board is laid within the space enclosed by the four drainage channels;

[0010] A ventilated observation tube is vertically connected to the four-way connector;

[0011] A siphon pipe is connected to the drainage trough;

[0012] A sedimentation observation well is connected to the siphon pipe;

[0013] The water collection tank is connected to the sedimentation observation well;

[0014] Inspection wells are vertically connected and installed on the water collection tank;

[0015] The drainage board is provided with mounting plates on all four sides, and the drainage channel is provided with support plates on both sides for the mounting plates to be stacked. The upper end face of the support plate is provided with a long strip of pressure strip, and the lower end face of the mounting plate is provided with a pressure groove for the pressure strip to be embedded. The drainage channel is provided with a locking mechanism to fix the mounting plate.

[0016] In a preferred embodiment, the present invention can be further configured as follows: the locking mechanism includes a locking rod, a pair of connecting rods, a pressure roller, a torsion spring, and a locking member. One end of the locking rod is rotatably connected to one side wall of the drainage groove. The upper ends of the pair of connecting rods are rotatably connected to the middle position of the locking rod and are distributed in a figure-eight shape. The pressure roller is located at the lower end of the connecting rod and aligned with the pressure bar. The torsion spring is located at the upper end of the connecting rod and is used to apply a force that brings them closer together. The locking member is used to fix the locking rod when the locking rod is flipped to a horizontal state.

[0017] In a preferred embodiment, the present invention can be further configured such that: the locking member includes a lock groove and a pair of lock blocks, the lock groove is U-shaped and for the locking rod to be inserted, the lock blocks are disposed on the inner walls of both sides of the lock groove, the sides of the lock blocks that are close to each other are inclined, and the lower ends are close to each other, and the locking rod is provided with a lock hole for the lock blocks to be inserted.

[0018] In a preferred embodiment, the invention may be further configured such that a top wheel is provided at the middle position of the locking rod between a pair of connecting rods, the top wheel being aligned with the pressure bar.

[0019] In a preferred embodiment, the present invention may be further configured such that: both sides of the drainage groove are provided with insertion holes for inserting the edge position of the mounting plate.

[0020] In a preferred embodiment, the present invention can be further configured such that: both sides of the pressure strip are provided with downwardly inclined locking strips, and the pressure groove is provided with a slot for the locking strips to be embedded.

[0021] Another objective of this invention is to provide a construction method for a drainage structure for a narrow garage roof, which facilitates construction.

[0022] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a construction method for a drainage structure for a narrow garage roof, comprising the following steps:

[0023] S1. For the construction of slope finding of pre-mixed fluidized solidified soil, slopes are found according to the slope designed in the drawings. The elevation line and control line of the slope finding layer are marked on the walls and pipes that protrude from the structural surface. According to the slope direction and slope, the elevation of the highest and lowest points are found. The elevation of the top surface of each grid point of the slope finding layer is measured in combination with the slope finding line. Small lines are drawn to make mortar spots with a spacing of 2m to control the elevation of the top surface of the slope finding layer and ensure that the solidified soil strength is above 3Mpa.

[0024] S2 and DS mortar leveling layer construction: Leveling is carried out by pulling a line according to the elevation control line. The leveling layer thickness is 20mm. The leveling layer should be flat and free from hollow areas, cracks, sand, and peeling.

[0025] S3, Waterproofing layer construction: The waterproof membrane is laid on the leveling layer, and the joints are overlapped, with an overlap width of 100mm.

[0026] S4. Drainage channel and four-way connector construction: After cleaning the work surface, locate the position of the four-way connector on the garage roof slab, then lay the drainage channel and four-way connector, and insert the drainage channel into the four-way connector.

[0027] S5, Drainage board construction: Lay the drainage board between the drainage channels. When encountering inverted beams, vertical walls and window wells, etc., the geotextile is used to finish the edges and is then glued and sealed. The geotextile joints are glued and sealed, and the geotextile overlap width is 100mm.

[0028] S6, construction of the ventilation observation tube: Drill a hole in the four-way connector, install the ventilation observation tube vertically, seal the connection parts with special adhesive, and use a stabilizing frame for stability. Install a dust cover at the top, wrap the ventilation observation tube with geotextile, and seal it with adhesive.

[0029] S7, Geotextile construction: The geotextile is laid on the drainage ditch and then sealed with adhesive.

[0030] S8, Vertical siphon pipe construction: After all the roof slabs of the garage are laid, determine the outlet position of the drainage channel, then install the siphon pipe on the side of the garage to connect to the drainage channel, and seal it with special glue;

[0031] S9, Sedimentation observation well construction: Install sedimentation observation wells on the side of the garage and seal them with special glue. When multiple outlets are set on one side of the garage roof, they are connected in parallel to increase the drainage volume.

[0032] S10, for the construction of the water collection tank, first excavate the foundation pit and lay the foundation layer, then install the plastic water storage modules layer by layer. Each water storage module is fixed with connectors. After assembly, it is a complete water collection tank. The corners of the assembled water collection tank are wrapped with double-sided self-adhesive material and the composite impermeable geomembrane is fixed.

[0033] S11, Inspection well construction: The inspection well is installed in the water collection tank, and the contact parts between the inspection well wall and other parts are sealed with special glue;

[0034] S12, earthwork backfilling, the backfill thickness is greater than or equal to 500mm and compacted. Initial backfilling should be evenly backfilled from around the water collection tank. When backfilling to the top of the water storage module, the backfill should be gently excavated and placed. After the soil cover on the water collection tank is greater than 500mm and compacted, small machinery can be used for backfilling. Backfilling of siphon pipes, drainage pipes, sedimentation observation wells and inspection wells should be done manually.

[0035] In a preferred embodiment, the present invention can be further configured such that, in step S10, the outer side of the water collection tank is covered with a 1.5cm thick PVC board as a base layer.

[0036] In a preferred embodiment, the present invention can be further configured such that, in step S11, while installing the plastic water collection tank layer by layer, a manhole fixing frame is installed on each layer to fix the manhole of the middle manhole of the plastic water storage module.

[0037] In summary, the present invention has the following beneficial effects:

[0038] 1. By using interlocking drainage channels and drainage boards, both rapid and convenient construction can be achieved, while ensuring a tight connection and fixation between them to prevent misalignment during backfilling. This ensures the stability and smoothness of drainage and avoids drainage problems.

[0039] 2. By adopting a unique construction process, a drainage structure is installed on the narrow garage roof slab, overcoming the technical problems of defects in the construction of drainage boards and geotextiles in traditional gravity drainage systems, as well as the excessive thickness of the slope-finding layer in narrow areas. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of Example 1;

[0041] Figure 2 This is a schematic diagram of the drainage trough and drainage board in Example 1;

[0042] Figure 3 This is a schematic diagram of the drainage trough in Example 1;

[0043] Figure 4 This is a schematic diagram showing the connection relationship between the drainage trough and the drainage board in Example 1;

[0044] Figure 5 This is a schematic diagram of the connection relationship between the mounting plate and the support plate in Example 1.

[0045] Reference numerals: 1. Drainage channel; 11. Support plate; 12. Pressure strip; 13. Locking strip; 14. Insertion hole; 2. Four-way connector; 3. Drainage board; 31. Mounting plate; 32. Pressure groove; 33. Locking groove; 4. Ventilation observation tube; 5. Siphon pipe; 6. Sedimentation observation well; 7. Water collection tank; 8. Inspection well; 9. Locking mechanism; 91. Locking rod; 92. Connecting rod; 93. Pressure wheel; 94. Torsion spring; 95. Locking element; 96. Top wheel; 97. Locking groove; 98. Locking block; 99. Lock hole. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Example 1:

[0048] like Figure 1 , Figure 2 As shown, a drainage structure for a narrow garage roof includes a drainage channel 1, a four-way connector 2, a drainage board 3, a ventilated observation pipe 4, a siphon pipe 5, a sedimentation observation well 6, a water collection tank 7, and an inspection well 8.

[0049] like Figure 1 , Figure 2 As shown, the drainage channels 1 are laid upside down on the garage roof in a crisscross pattern, forming rectangular installation spaces. Four-way connectors 2 are positioned between the ends of four adjacent drainage channels 1, allowing the drainage channels 1 to be inserted to achieve connectivity between all drainage channels 1.

[0050] like Figure 3 , Figure 4 , Figure 5 As shown, the drainage board 3 is laid in the installation space enclosed by four drainage channels 1. The drainage board 3 is horizontally extended around its perimeter with mounting plates 31. Supporting plates 11 for stacking mounting plates 31 are provided on both sides of the drainage channels 1. When the drainage board 3 is laid between the drainage channels 1, the holes on the drainage board 3 are aligned with the drainage holes on the drainage channels 1, so that the water flow can quickly gather into the drainage channels 1.

[0051] like Figure 3 , Figure 4 , Figure 5 As shown, both sides of the drainage channel 1 are provided with insertion holes 14. The insertion holes 14 are elongated and are for inserting the edge of the mounting plate 31 to achieve initial positioning after the drainage plate 3 is installed. The upper end face of the support plate 11 is provided with an elongated pressure strip 12, which is arranged vertically along the length of the support plate 11. The lower end face of the mounting plate 31 is provided with a pressure groove 32 for the pressure strip 12 to be embedded, so as to achieve snap-fit ​​positioning between the mounting plate 31 and the support plate 11.

[0052] like Figure 3 , Figure 4 , Figure 5 As shown, both sides of the pressure strip 12 are provided with downwardly inclined locking strips 13, and the pressure groove 32 is provided with a slot 33 for the locking strips 13 to be inserted. Therefore, when the pressure strip 12 is inserted into the pressure groove 32, the cooperation between the locking strips 13 and the slots 33 can lock the mounting plate 31 and the support plate 11, and prevent the two from being separated, thereby increasing the stability and tightness of the connection between the two.

[0053] like Figure 1 As shown, the venting observation pipe 4 is vertically connected to the four-way connector 2, the siphon pipe 5 is located on the side of the garage and connected to the outlet end of the drainage trough 1. The sedimentation observation well 6 is connected to the tail end of the siphon pipe 5, and the water collection tank 7 is connected to the sedimentation observation well 6. At the same time, the inspection well 8 is vertically connected to the water collection tank 7.

[0054] When laying the drainage channel 1 and drainage board 3, first position the four-way connector 2 and the drainage channel 1, then insert the drainage channel 1 into the four-way connector 2 to connect and fix the two. Then take out the drainage board 3, place the drainage board 3 within the gap formed by the drainage channel 1, and make the mounting plate 31 on the drainage board 3 overlap the support plates 11 on both sides of the drainage channel 1. Then press the mounting plate 31 into the insertion holes 14 on both sides of the drainage channel 1 to initially define the position of the mounting plate 31.

[0055] Then, press down on the mounting plate 31 so that the pressure strip 12 on the support plate 11 is embedded into the pressure groove 32 on the lower end face of the mounting plate 31, thus achieving initial fixation between the support plate 11 and the mounting plate 31. At the same time, the retaining strip 13 on the pressure strip 12 deforms under pressure and is embedded into the retaining groove 33, and then springs open to hook and tighten the retaining groove 33, thus fixing the pressure strip 12 and achieving assembly between the mounting plate 31 and the support plate 11.

[0056] Therefore, when installing drainage channel 1 and drainage board 3, they are fixed by interlocking to achieve quick and convenient construction, while ensuring a tight connection and preventing misalignment during backfilling. This ensures the stability and smoothness of drainage and avoids poor drainage.

[0057] When the entire drainage structure is in operation, rainwater that seeps into the ground will enter the drainage board 3, flow through the channels within the drainage board 3, and collect in the drainage trough 1 after passing through the drainage holes on the drainage trough 1. Subsequently, the rainwater in the drainage trough 1 is drawn outward by the siphon effect of the siphon pipe 5 and enters the sedimentation observation well 6, finally collecting in the collection tank 7. This achieves rainwater collection, and the rainwater in the collection tank 7 can be filtered and deeply treated before reuse, realizing the recycling and reuse of rainwater resources. At the same time, it also prevents water seepage through the garage roof slab and prevents the garage from leaking.

[0058] like Figure 3 , Figure 4As shown, the drainage trough 1 is provided with a locking mechanism 9 for fixing the mounting plate 31. The locking mechanism 9 includes a locking rod 91, a pair of connecting rods 92, a pressure wheel 93, a torsion spring 94, and a locking element 95.

[0059] like Figure 3 , Figure 4 As shown, one end of the locking rod 91 is rotatably connected to one side wall of the drainage groove 1, and when rotated to the horizontal position, it is positioned above the drainage hole on the drainage groove 1 to prevent obstruction of the drainage hole. At the same time, the locking member 95 is provided on the drainage groove 1 and is used to fix the locking rod 91 when it is flipped to the horizontal position.

[0060] like Figure 3 , Figure 4 As shown, the upper ends of a pair of connecting rods 92 are rotatably connected to the middle position of the locking rod 91, and are arranged in a V-shape. A pressure roller 93 is located at the lower end of the connecting rod 92 and aligned with the pressure strip 12 to press the mounting plate 31, causing the pressure strip 12 to embed into the pressure groove 32. A torsion spring 94 is located at the upper end of the connecting rod 92 and is used to apply a force that brings them closer together.

[0061] like Figure 3 , Figure 4 As shown, a top wheel 96 is provided at the middle position of the locking lever 91. The top wheel 96 is located between a pair of connecting rods 92 and is aligned with the pressure strip 12 to press the middle position of the mounting plate 31 when the locking lever 91 is flipped to the horizontal position.

[0062] like Figure 3 , Figure 4 As shown, the locking member 95 includes a locking groove 97 and a pair of locking blocks 98. The locking groove 97 is U-shaped and opens upwards for the locking rod 91 to be inserted. The locking blocks 98 are disposed on the inner walls of both sides of the locking groove 97. The sides of the locking blocks 98 that are close to each other are inclined and their lower ends are close to each other. The locking rod 91 is provided with a lock hole 99 for the locking blocks 98 to be inserted.

[0063] When it is necessary to fix the mounting plate 31 on the support plate 11, the control locking rod 91 is gradually rotated from the vertical direction to the horizontal direction. At the same time, the locking rod 91 drives the connecting rod 92 and the pressure roller 93 to move synchronously and first contact the middle position of the mounting plate 31. Under the action of the mounting plate 31, the pressure strip 12 is embedded into the pressure groove 32.

[0064] As the locking lever 91 continues to rotate, a pair of connecting levers 92 gradually open and control the pressure rollers 93 to move toward both ends of the mounting plate 31. At the same time, under the force of the torsion spring 94, the pressure rollers 93 move while pressing the mounting plate 31, and continuously press the pressure strip 12 into the pressure groove 32, thus eliminating the need for manual step-by-step pressing and making the connection process more convenient.

[0065] When the locking lever 91 rotates to the horizontal position, the pressure roller 93 presses against both ends of the mounting plate 31, while the top roller 96 presses against the middle position of the mounting plate 31. The mounting plate 31 is fixed by the three-point positioning method, thereby increasing the stability and tightness between the mounting plate 31 and the support plate 11.

[0066] When the locking lever 91 rotates to a horizontal position, it gradually embeds into the locking groove 97. At this time, under the action of the inclined surface on the locking block 98, the locking groove 97 opens outward. Until the locking hole 99 on the locking lever 91 aligns with the locking block 98, the locking groove 97 returns to its original position, and the locking block 98 is embedded into the locking hole 99, thus achieving self-locking fixation of the locking lever 91 and simultaneously securing the mounting plate 31 and the support plate 11.

[0067] Example 2:

[0068] A construction method for a drainage structure on the roof of a narrow garage includes the following steps.

[0069] S1. For the construction of slope finding of pre-mixed fluidized solidified soil, slopes are found according to the slope designed in the drawings. The elevation line and control line of the slope finding layer are marked on the walls and pipes that protrude from the structural surface. According to the slope direction and slope, the elevation of the highest and lowest points are found. Combined with the slope line, the elevation of the top surface of each grid point of the slope finding layer is measured. Small lines are drawn to make mortar spots with a spacing of 2m to control the elevation of the top surface of the slope finding layer and ensure that the solidified soil strength is above 3Mpa.

[0070] S2 and DS mortar leveling layer construction: Leveling is carried out by pulling a line according to the elevation control line. The leveling layer thickness is 20mm. The leveling layer should be flat and free from hollow areas, cracks, sand, and peeling.

[0071] S3, Waterproofing layer construction: The waterproof membrane is laid on the leveling layer, and the joints are overlapped, with an overlap width of 100mm.

[0072] S4. Construction of drainage channel 1 and four-way connector 2: After cleaning the working surface, lay double-sided self-adhesive. Position the four-way connector 2 on the garage roof slab, then lay drainage channel 1 and four-way connector 2, and insert drainage channel 1 into four-way connector 2. At the same time, when the temperature is low, a hot air welding gun can be used to heat and fix the double-sided self-adhesive.

[0073] S5, Drainage board 3 construction: Lay drainage board 3 between drainage channels 1. At locations such as inverted beams, vertical walls, and window wells, the geotextile edges are finished and sealed with adhesive to ensure the overall drainage direction. The geotextile joints are sealed with adhesive, with a 100mm overlap to ensure the system's compactness and prevent soil from entering the system and affecting its drainage effect.

[0074] S6, construction of the ventilation observation tube 4: make a hole in the four-way connector 2, install the ventilation observation tube 4 vertically, seal the connection part with special pipe fittings, and use a stabilizing frame for stability. Install a dust cover at the top, wrap the ventilation observation tube 4 with geotextile, and seal it with adhesive.

[0075] S7, Geotextile construction: Lay the geotextile on the drainage ditch 1 and seal it with adhesive.

[0076] S8, Vertical siphon pipe 5 construction: After all the roof slabs of the garage are laid, determine the outlet position of the drainage channel 1, then install the siphon pipe 5 on the side of the garage to connect to the drainage channel 1, and seal it with special glue.

[0077] S9, Sedimentation observation well 6 construction: Install sedimentation observation well 6 on the side of the garage and seal it with special glue. When multiple water outlets are set on one side of the garage roof, they are connected in parallel to increase the drainage volume.

[0078] For the construction of S10, the water collection tank 7 is constructed by first excavating the foundation pit and laying a foundation layer, followed by the installation of plastic water storage modules. Each water storage module is fixed with connectors. After assembly, it forms a complete water collection tank 7. The corners of the assembled water collection tank 7 are wrapped with double-sided self-adhesive material and a composite impermeable geomembrane is fixed in place. At the same time, the outside of the water collection tank 7 is covered with a 1.5cm thick PVC board as the base layer. The PVC board has high impact resistance and can effectively protect the water collection tank 7.

[0079] S11, Construction of Inspection Well 8: Install Inspection Well 8 inside the water collection tank 7. Seal the contact points between the well wall of Inspection Well 8 and other parts with special adhesive to prevent water leakage, and secure the pipes. While installing the plastic water collection tank 7 layer by layer, install a fixing frame for Inspection Well 8 on each layer to secure the well shaft of the intermediate Inspection Well 8 of the plastic water storage module.

[0080] S12, earthwork backfilling, the backfill thickness is greater than or equal to 500mm and compacted. Initial backfilling should be evenly backfilled from all sides of the water collection tank 7. When backfilling to the top of the water storage module, the backfilling should be done gently. After the soil covering the water collection tank 7 is greater than 500mm and compacted, small machinery can be used for backfilling. Backfilling of the siphon pipe 5, drainage pipe, sedimentation observation well 6 and inspection well 8 should be done manually.

[0081] The specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A drainage structure for a narrow garage roof slab, characterized in that: include: Drainage channel (1) is laid upside down on the garage roof slab in a grid pattern with intersecting horizontal and vertical lines; A four-way connector (2) is provided between the ends of the drainage channel (1) and is inserted into the drainage channel (1); Drainage board (3) is laid in the space enclosed by the four drainage channels (1); A breathable observation tube (4) is vertically connected to the four-way connector (2); A siphon pipe (5) is connected to the drainage trough (1); Sedimentation observation well (6) is connected to the siphon pipe (5); A water collection tank (7) is connected to the sedimentation observation well (6); Inspection well (8) is vertically connected to the water collection tank (7); The drainage plate (3) is provided with mounting plates (31) around its perimeter. The drainage channel (1) is provided with support plates (11) on both sides for the mounting plates (31) to be stacked. The upper end of the support plate (11) is provided with a long strip of pressure strip (12). The lower end of the mounting plate (31) is provided with a pressure groove (32) for the pressure strip (12) to be embedded. The drainage channel (1) is provided with a locking mechanism (9) for fixing the mounting plate (31). The locking mechanism (9) includes a locking rod (91), a pair of connecting rods (92), a pressure wheel (93), a torsion spring (94), and a locking member (95). One end of the locking rod (91) is rotatably connected to one side wall of the drainage trough (1). The upper ends of the pair of connecting rods (92) are rotatably connected to the middle position of the locking rod (91) and are distributed in a figure-eight shape. The pressure wheel (93) is located at the lower end of the connecting rod (92) and aligned with the pressure strip (12). The torsion spring (94) is located at the upper end of the connecting rod (92) and is used to apply a force that brings them closer together. The locking member (95) is used to fix the locking rod (91) when the locking rod (91) is flipped to a horizontal state. The locking member (95) includes a locking groove (97) and a pair of locking blocks (98). The locking groove (97) is U-shaped and is for the locking rod (91) to be inserted into. The locking blocks (98) are disposed on the inner walls of both sides of the locking groove (97). The sides of the locking blocks (98) that are close to each other are inclined and their lower ends are close to each other. The locking rod (91) is provided with a lock hole (99) for the locking blocks (98) to be inserted into.

2. The drainage structure for a narrow garage roof slab according to claim 1, characterized in that: A top wheel (96) is provided at the middle position of the locking rod (91) between a pair of connecting rods (92), and the top wheel (96) is aligned with the pressure strip (12).

3. The drainage structure for a narrow garage roof slab according to claim 1, characterized in that: Both sides of the drainage channel (1) are provided with insertion holes (14) for inserting the edge of the mounting plate (31).

4. The drainage structure for a narrow garage roof slab according to claim 3, characterized in that: Both sides of the pressure strip (12) are provided with downwardly inclined locking strips (13), and the pressure groove (32) is provided with a locking groove (33) for the locking strips (13) to be inserted.

5. A construction method for a drainage structure for a narrow garage roof slab, used for constructing the drainage structure for a narrow garage roof slab as described in any one of claims 1-4, characterized in that: Includes the following steps: S1. For the construction of slope finding of pre-mixed fluidized solidified soil, slopes are found according to the slope designed in the drawings. The elevation line and control line of the slope finding layer are marked on the walls and pipes that protrude from the structural surface. According to the slope direction and slope, the elevation of the highest and lowest points are found. The elevation of the top surface of each grid point of the slope finding layer is measured in combination with the slope finding line. Small lines are drawn to make mortar spots with a spacing of 2m to control the elevation of the top surface of the slope finding layer and ensure that the solidified soil strength is above 3Mpa. S2 and DS mortar leveling layer construction: Leveling is carried out by pulling a line according to the elevation control line. The leveling layer thickness is 20mm. The leveling layer should be flat and free from hollow areas, cracks, sand, and peeling. S3, Waterproofing layer construction: The waterproof membrane is laid on the leveling layer, and the joints are overlapped, with an overlap width of 100mm. S4, Drainage channel (1) and four-way connector (2) construction: After cleaning the working surface, locate the position of the four-way connector (2) on the garage roof, then lay the drainage channel (1) and four-way connector (2) and insert the drainage channel (1) into the four-way connector (2); S5, Drainage board (3) construction, Drainage board (3) is laid between drainage channels (1). When encountering geotextile edge-closing positions of inverted beams, vertical walls and window wells, the geotextile joints are sealed with adhesive, and the geotextile overlap width is 100mm. S6, construction of the ventilation observation tube (4): make a hole in the four-way connector (2), install the ventilation observation tube (4) vertically, seal the connection part with special glue, and equip it with a stabilizing frame for stability. Install a dust cover at the top, wrap the ventilation observation tube (4) with geotextile, and seal it with glue. S7, Geotextile construction: The geotextile is laid on the drainage ditch (1) and sealed with adhesive. S8, Vertical siphon pipe (5) construction, after all the roof slabs of the garage are laid, determine the outlet position of the drainage channel (1), then install the siphon pipe (5) on the side of the garage to connect the drainage channel (1), and seal it with special glue; S9, Construction of sedimentation observation well (6): Install sedimentation observation well (6) on the side of the garage and seal it with special glue. When multiple outlets are set on one side of the garage roof, they are connected in parallel to increase the drainage volume. S10, Construction of the water collection tank (7): First, excavate the foundation pit and lay the cushion layer, then install the plastic water storage modules layer by layer. Each water storage module is fixed with connectors. After assembly, it is a complete water collection tank (7). The corners of the assembled water collection tank (7) are wrapped with double-sided self-adhesive material and the composite impermeable geomembrane is fixed. S11, Construction of inspection well (8): The inspection well (8) is installed in the water collection tank (7). The contact parts between the inspection well (8) and other parts are sealed with special glue. S12, earthwork backfilling, the backfill thickness is greater than or equal to 500mm and compacted. Initial backfilling should be evenly backfilled from the perimeter of the water collection tank (7). When backfilling to the top of the water storage module, the backfilling should be done gently. When the soil covering the water collection tank (7) is greater than 500mm and compacted, small machinery should be used for backfilling. Backfilling of the siphon pipe (5), drainage pipe, sedimentation observation well (6) and inspection well (8) should be done manually.

6. The construction method of a drainage structure for a narrow garage roof slab according to claim 5, characterized in that: In step S10, the outside of the water collection tank (7) is covered with a 1.5cm thick PVC board as the base layer.

7. The construction method of a drainage structure for a narrow garage roof slab according to claim 6, characterized in that: In step S11, while installing the plastic water collection tank (7) layer by layer, a manhole (8) fixing frame is installed on each layer to fix the well cylinder of the middle manhole (8) of the plastic water storage module.

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