A dewatering structure for bottom board skip construction

Abstract

The utility model relates to a kind of precipitation structures for bottom plate skip bay construction, including upper drain pipe, water stop ring and lower drain pipe;In the position of the design precipitation point of bottom plate skip bay method construction, set graded sand below;The lower end of the lower drain pipe is inserted into graded sand after passing through cushion;Pouring bottom plate concrete on cushion;The upper end of the lower drain pipe is connected with upper drain pipe by water stop ring;Then pouring concrete pouring layer, form precipitation structure for bottom plate skip bay construction.The upper drain pipe and the lower drain pipe of the utility model are connected by thread through water stop ring, achieve the effect of water stop and leakage prevention, use graded sand under cushion as inverted filter layer, continuously dewater, the whole structure can control and ensure groundwater level, avoid the damage of bottom plate buoyancy to structure, ensure the quality of construction.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a dewatering structure for foundation slab skip-construction. Background Technology

[0002] In early building construction, post-pouring strips were used as a construction technique. However, with the increasing number of construction projects involving ultra-long, ultra-wide, and ultra-thick large-volume concrete structures, the skip-pour method is now mainly used to release early internal stresses in the concrete and control cracking in these structures. The skip-pour method eliminates post-pouring strips, making the foundation slab a single unit. At this point, drainage systems are needed to control and maintain the groundwater level; otherwise, the high buoyancy of the foundation slab could damage the structure. Utility Model Content

[0003] In order to overcome the defects of the skip-bed construction method in the prior art, the purpose of this utility model is to provide a dewatering structure for skip-bed construction of the foundation slab.

[0004] This utility model is achieved by the following technical solution: A dewatering structure for slab skip-construction includes an upper drainage pipe, a water-stop ring, and a lower drainage pipe. Graded aggregate is placed below the designed dewatering point for slab skip-construction. The lower end of the lower drainage pipe passes through a subbase and is inserted into the graded aggregate. Slab concrete is poured on the subbase. The upper end of the lower drainage pipe is connected to the upper drainage pipe via the water-stop ring. Then, a concrete pouring layer is formed to create the dewatering structure for slab skip-construction.

[0005] Furthermore, the water-stop ring includes a water-stop wing, a water-stop groove, a water-stop seat, and a drain pipe connection part; a water-stop groove is provided above the water-stop seat, and a water-stop wing is provided above the water-stop groove; a drain pipe connection part is provided in the portion of the inner hole of the water-stop ring corresponding to the water-stop groove and the water-stop wing; the drain pipe connection part is provided with internal threads; and a connection hole is provided on the water-stop seat.

[0006] Furthermore, the lower end of the upper drain pipe and the upper end of the lower drain pipe are provided with external threads; the upper drain pipe, the lower drain pipe and the drain pipe connection part are threaded together; a screw is provided in the connection hole.

[0007] Furthermore, the drain pipe includes a pipe body and a filter; drain holes are evenly distributed on the outer circumference of the lower end of the pipe body; and a filter is disposed inside the pipe body, above the drain holes.

[0008] Furthermore, the filter surface is provided with conical holes, the upper diameter of which is small and the lower diameter of which is large; the filter is provided with a set of connecting grooves along the diameter line; a spring is fixed in the connecting groove; the free end of the spring is fixed to the snap-fit ​​connector; the filter is fixed to the annular snap-fit ​​groove of the tube body through the snap-fit ​​connector.

[0009] Furthermore, a filter screen is provided at the lower end of the drain pipe; the filter screen is fitted onto the drain hole.

[0010] In summary, the upper and lower drainage pipes of this utility model are connected by a water-stop ring to achieve the function of water-stopping and leak-proofing. The graded sand and gravel under the cushion layer is used as a filter layer to continuously reduce water level. The entire structure can control and guarantee the groundwater level, avoid damage to the structure caused by the large buoyancy of the bottom plate, and ensure the quality of construction. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall construction structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the connection structure between the upper and lower drainage pipes of this utility model.

[0013] Figure 3 This is an enlarged half-sectional structural diagram of the water-stop ring of this utility model.

[0014] Figure 4 This is a cross-sectional view of the drain pipe of this utility model.

[0015] Figure 5 This is a schematic diagram of the structure of the filter of this utility model.

[0016] The components include: 1. Upper drain pipe; 2. Water-stop ring; 3. Screw; 4. Lower drain pipe; 5. Graded sand and gravel; 6. Filter screen; 7. Subbase layer; 8. Base slab concrete; 9. Concrete pouring layer; 21. Water-stop wing; 22. Water-stop groove; 23. Water-stop seat; 24. Connecting hole; 25. Drain pipe connection; 41. Pipe body; 42. Filter; 43. Drain hole; 421. Conical hole; 422. Connecting groove; 423. Clip joint; 424. Spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figures 1 to 5As shown, a dewatering structure for slab skip-construction includes an upper drainage pipe 1, a water-stop ring 2, and a lower drainage pipe 4. Graded sand and gravel 5 is placed below the designed dewatering point for slab skip-construction. The lower end of the lower drainage pipe 4 passes through a cushion layer 7 and is inserted into the graded sand and gravel 5. Slab concrete 8 is poured on the cushion layer 7. The upper end of the lower drainage pipe 4 is connected to the upper drainage pipe 1 via the water-stop ring 2. Then, a concrete pouring layer 9 is poured to form the dewatering structure for slab skip-construction. In use, this invention involves placing graded sand and gravel 5 below the designed precipitation point. The graded sand and gravel 5 enhances drainage when the soil layer is under pressure, causing water in the pores to dissipate more quickly, accelerating soil consolidation, and increasing the bearing capacity of the foundation. Then, the foundation layer 7 is constructed, followed by the insertion of the lower drainage pipe 4, and then the base slab concrete 8 is poured on top of the foundation layer 7. A water-stop ring 2 is then installed on the upper end of the lower drainage pipe 4, and the upper drainage pipe 1 is installed on the water-stop ring 2. A water pump is connected to the upper drainage pipe 1 for pumping. Finally, a concrete pouring layer 9 is poured on the base slab concrete 8. When the 9th layer is poured to the position of the water-stop ring 2, insert the screw 3 into the water-stop ring 2 and the concrete pouring layer 9, and continue pouring. After the concrete pouring layer 9 has initially set, rotate the upper drainage pipe 1 to loosen the upper drainage pipe 1 from the concrete pouring layer 9, while making the connection between the upper drainage pipe 1 and the water-stop ring 2 tighter. After the concrete pouring layer 9 has finally set, immediately rotate the upper drainage pipe 1 again to make the connection between the upper drainage pipe 1 and the water-stop ring 2 tighter, ensuring that the floating water under the bottom slab concrete 8 is continuously discharged due to pressure until it is discharged to 500mm below the bottom slab concrete 8. Continue this construction until the structure is capped or all other loads are completed, and then stop pumping. Since the threads of the upper drainage pipe 1 and the water-stop ring 2 rotate once each after initial and final setting, the upper drainage pipe 1 can be unscrewed in the reverse direction. After unscrewing the upper drainage pipe 1, waterproof concrete of a grade one higher than that of the bottom slab concrete 8 is used to fill the hole left by the unscrewed upper drainage pipe 1 to ensure the flatness of the surface after construction. The upper drainage pipe 1 and the lower drainage pipe 4 of this utility model are made of two DN100 PVC pipes or steel sleeves, which are connected by threads through the water-stop ring 2. The graded sand and gravel 5 under the cushion layer 7 is used as a reverse filter layer to continuously lower the water level, thereby controlling and ensuring the groundwater level, avoiding the damage to the structure caused by the large buoyancy of the bottom slab, and ensuring the quality of construction.

[0019] As a preferred embodiment, such as Figure 2 and Figure 3As shown, the water-stop ring 2 includes a water-stop wing 21, a water-stop groove 22, a water-stop seat 23, and a drain pipe connection part 25. The water-stop groove 22 is provided above the water-stop seat 23, and the water-stop wing 21 is provided above the water-stop groove 22. The drain pipe connection part 25 is provided in the inner hole of the water-stop ring 2 corresponding to the water-stop groove 22 and the water-stop wing 21. The drain pipe connection part 25 is provided with internal threads. The water-stop seat 23 is provided with a connection hole 24. The water-stop ring 2 of this utility model utilizes the water-stop wing 21 and the water-stop groove 22 to increase the contact area and adhesion with concrete, forming a sealed waterproof layer, thereby effectively avoiding the leakage problem caused by the incomplete sealing of traditional pre-reserved holes.

[0020] As a preferred embodiment, such as Figure 2 and Figure 3 As shown, the lower end of the upper drainage pipe 1 and the upper end of the lower drainage pipe 4 are provided with external threads; the upper drainage pipe 1, the lower drainage pipe 4 and the drainage pipe connection part 25 are threadedly connected; a screw 3 is provided in the connection hole 24; the lower end of the upper drainage pipe 1 and the lower drainage pipe 4 are connected by the threaded structure provided in the drainage pipe connection part 25, and after the concrete pouring layer 9 has finally set, it is convenient to remove the upper drainage pipe 1 and pour the hole left after removing the upper drainage pipe 1.

[0021] As a preferred embodiment, such as Figure 4 As shown, the drain pipe 4 includes a pipe body 41 and a filter 42; drain holes 43 are evenly arranged on the outer circular surface of the lower end of the pipe body 41; a filter 42 is arranged inside the pipe body 41, above the drain holes 43, to prevent silt and soil from accumulating inside the pipe.

[0022] As a preferred embodiment, such as Figure 5 As shown, the filter 42 has a tapered hole 421 on its surface, with a smaller upper diameter and a larger lower diameter. The filter 42 has a set of connecting grooves 422 along its diameter. A spring 424 is fixed in the connecting groove 422. The free end of the spring 424 is fixed to a snap-fit ​​connector 423. The filter 42 is fixed to the annular snap-fit ​​groove of the tube body 41 via the snap-fit ​​connector 423. By installing the filter 42 in the annular snap-fit ​​groove of the tube body 41, excellent filtration can be achieved through the tapered hole 421 with a smaller upper diameter and a larger lower diameter.

[0023] As a preferred embodiment, such as Figure 1 As shown, a filter screen 6 is provided at the lower end of the drain pipe 4; the filter screen 6 is fitted onto the drain hole 43; to filter again and prevent clogging.

[0024] Although the specific embodiments of this utility model have been described and explained in detail above, it should be noted that various equivalent changes and modifications can be made to the above embodiments based on the concept of this utility model. As long as the resulting functions do not exceed the spirit covered by the specification, they should all be within the protection scope of this utility model.

Claims

1. A dewatering structure for foundation slab skip-slab construction, comprising an upper drainage pipe, a water-stop ring, and a lower drainage pipe; characterized in that: Graded sand and gravel are placed below the design dewatering point for the skip-slab construction method; the lower end of the drainage pipe passes through the cushion layer and is inserted into the graded sand and gravel; the foundation slab concrete is poured on the cushion layer; the upper end of the drainage pipe is connected to the upper drainage pipe through a water-stop ring; then a concrete pouring layer is poured to form the dewatering structure for the skip-slab construction.

2. The dewatering structure for foundation slab skip-construction according to claim 1, characterized in that: The water-stop ring includes a water-stop wing, a water-stop groove, a water-stop seat, and a drain pipe connection part; a water-stop groove is provided above the water-stop seat, and a water-stop wing is provided above the water-stop groove; a drain pipe connection part is provided in the part of the inner hole of the water-stop ring corresponding to the water-stop groove and the water-stop wing; the drain pipe connection part is provided with internal thread; and a connection hole is provided on the water-stop seat.

3. The dewatering structure for foundation slab skip-construction according to claim 2, characterized in that: The lower end of the upper drain pipe and the upper end of the lower drain pipe are provided with external threads; the upper drain pipe, the lower drain pipe and the drain pipe connection part are threaded together; a screw is provided in the connection hole.

4. The dewatering structure for foundation slab skip-construction according to claim 1, characterized in that: The drain pipe includes a pipe body and a filter; drain holes are evenly distributed on the outer circumference of the lower end of the pipe body; a filter is located inside the pipe body, above the drain holes.

5. A dewatering structure for foundation slab skip-construction as described in claim 4, characterized in that: The filter surface is provided with a conical hole, with a smaller upper diameter and a larger lower diameter; the filter is provided with a set of connecting grooves along the diameter line; a spring is fixed in the connecting groove; the free end of the spring is fixed to the snap-fit ​​connector; the filter is fixed to the annular snap-fit ​​groove of the tube body through the snap-fit ​​connector.

6. The dewatering structure for foundation slab skip-construction according to claim 4, characterized in that: A filter screen is provided at the lower end of the drain pipe; the filter screen is fitted over the drain hole.

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