Foundation pit drainage blind ditch structure
By installing triangular supports and connecting pipes inside the drainage pipe, and using limiting plates and filter cloth, the problem of deformation of traditional drainage pipes under heavy pressure was solved, achieving stable drainage of seepage water in the foundation pit and improving construction progress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE THIRD CONSTR ENG CO LTD OF CHINA CONSTR SECOND ENG BUREAU
- Filing Date
- 2025-04-23
- Publication Date
- 2026-06-09
Smart Images
Figure CN224338211U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction, and in particular to a structure for a foundation pit drainage blind ditch. Background Technology
[0002] A foundation pit drainage ditch is an effective measure in construction engineering to remove groundwater and prevent water accumulation in the foundation pit. It is constructed by setting up a ditch with a certain slope around or at the bottom of the foundation pit and filling it with a permeable material such as crushed stone or gravel, so that groundwater can flow smoothly into the ditch and be discharged out of the foundation pit through pipes, thereby achieving the purpose of lowering the groundwater level and keeping the foundation pit dry.
[0003] Traditional foundation pit drainage blind ditches typically involve directly burying perforated drainage pipes within the ditch during construction, followed by backfilling with gravel. However, due to the limited pressure-bearing capacity of the drainage pipes, heavy gravel or vehicle traffic can cause deformation, affecting drainage efficiency and requiring improvement. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a foundation pit drainage blind ditch structure with the advantage of ensuring drainage effect.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a foundation pit drainage blind ditch structure, comprising:
[0006] The trench is dug at the bottom of the foundation pit;
[0007] A drain pipe is installed in the ditch. The drain pipe is hollow and has a support body with a triangular cross-section inside. The support body is also hollow.
[0008] Crushed stone backfill material is placed in the ditch and wraps around the drainage pipe;
[0009] Geotextile is laid in the trench and wraps the crushed stone backfill.
[0010] A backfill soil layer is placed on top of the trench and covered with the geotextile.
[0011] In a preferred embodiment, the present invention can be further configured such that a connecting pipe is provided between two adjacent drain pipes, and both ends of the connecting pipe are provided with inserts for the drain pipes to be inserted.
[0012] In a preferred embodiment, the present invention can be further configured such that: a locking hook is provided at the end of the insertion tube, and a locking ring is provided on the outer wall of the drain pipe for the locking hook to be engaged.
[0013] In a preferred embodiment, the present invention can be further configured such that the outer wall of the drain pipe is wrapped with a filter cloth.
[0014] In a preferred embodiment, the present invention can be further configured such that the filter cloth has Velcro fasteners that are mutually bonded on both sides.
[0015] In a preferred embodiment, the present invention can be further configured such that: the end of the drain pipe is used to insert into the seepage well, and the outer wall of the drain pipe is provided with a limiting plate that abuts against the inner wall of the seepage well.
[0016] In a preferred embodiment, the present invention can be further configured as follows: the limiting plate includes a pair of stop bars and a pair of retaining rings. The pair of stop bars are used to abut against the inner wall of the seepage well. The retaining rings are disposed on the stop bars and are semi-circular in shape, and are used to fasten to the outer wall of the drainage pipe. One end of the retaining ring is provided with a hook, and the other end is provided with a hole for the hook to pass through.
[0017] In summary, this utility model has the following beneficial effects:
[0018] 1. By setting triangular supports inside the drainage pipe, the structural strength and compressive strength of the drainage pipe are increased, preventing deformation of the drainage pipe when subjected to heavy pressure or rolling, ensuring the permeability of the drainage pipe, and realizing the stable discharge of seepage water in the foundation pit;
[0019] 2. By installing quick-installation connecting pipes between drainage pipes, adjacent drainage pipes can be quickly connected and fixed, improving construction progress;
[0020] 3. By setting a limiting plate that can fix the drain pipe inside the seepage well, the drain pipe is prevented from moving around, ensuring that the seepage water can be stably collected and discharged into the seepage well. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of an embodiment;
[0022] Figure 2 This is a schematic diagram of the connection relationship of the drain pipes in an embodiment;
[0023] Figure 3 This is a schematic diagram of the filter cloth structure in an embodiment;
[0024] Figure 4 This is a schematic diagram illustrating the connection relationship between the drainage pipe and the seepage well in an embodiment.
[0025] Figure 5 This is a schematic diagram of the limiting plate in an embodiment.
[0026] Attached reference numerals: 1. Ditch; 2. Drainage pipe; 3. Crushed stone backfill; 4. Geotextile; 5. Backfill soil layer; 6. Support body; 7. Filter cloth; 71. Velcro; 8. Connecting pipe; 81. Insert pipe; 82. Locking hook; 83. Locking ring; 9. Limiting plate; 91. Stop bar; 92. Clamping ring; 93. Clamping hook; 94. Clamping hole. Detailed Implementation
[0027] The present invention will be further described in detail below with reference to the accompanying drawings.
[0028] like Figure 1 As shown, a foundation pit drainage blind ditch structure includes a ditch 1, a drainage pipe 2, crushed stone backfill material 3, geotextile 4, and backfill soil layer 5.
[0029] like Figure 1 , Figure 2 As shown, the trench 1 is a long strip excavated at the bottom of the foundation pit, and the drainage pipe 2 is installed in the trench 1. The drainage pipe 2 is designed in a loofah-like hollow shape, and a support body 6 with a triangular cross-section is installed inside. The support body 6 is also designed in a loofah-like hollow shape to ensure the permeability of the drainage pipe 2.
[0030] like Figure 1 As shown, the crushed stone backfill 3 is placed inside the ditch 1 and wraps around the drainage pipe 2. The geotextile 4 is laid inside the ditch 1 and wraps around the crushed stone backfill 3. The backfill soil layer 5 is placed on top of the ditch 1 and covered with the geotextile 4.
[0031] When constructing the drainage blind ditch structure, first use an excavator to dig out the ditch 1 on the bottom wall of the foundation pit, then lay the geotextile 4, then backfill a layer of crushed stone backfill material 3 on the geotextile 4, and then connect the drainage pipe 2 and place the drainage pipe 2 in the ditch 1.
[0032] Then, the crushed stone backfill material 3 is backfilled into the ditch 1 and wrapped around the drainage pipe 2. Then, the geotextile 4 is folded inward so that it completely wraps the crushed stone backfill material 3. Finally, the backfill soil layer 5 is backfilled and covered with the geotextile 4 to complete the construction of the foundation pit drainage blind ditch structure.
[0033] When there is seepage at the bottom of the foundation pit, the seepage water is initially filtered by the geotextile 4 and the crushed stone backfill 3, and then collects into the drainage pipe 2. Finally, it is collected into the seepage well along the drainage pipe 2, and then the seepage water is uniformly pumped out to achieve dewatering of the foundation pit.
[0034] Meanwhile, by setting a triangular support 6 inside the drainage pipe 2, the structural strength and compressive strength of the drainage pipe 2 are increased, preventing the drainage pipe 2 from deforming when subjected to heavy pressure or rolling, ensuring the permeability of the drainage pipe 2, and realizing the stable discharge of seepage water in the foundation pit.
[0035] like Figure 3As shown, the outer wall of the drain pipe 2 is wrapped with a filter cloth 7 to achieve secondary filtration of sewage and ensure stable discharge of seepage water from the drain pipe 2. The filter cloth 7 has Velcro straps 71 on both sides for quick installation, facilitating rapid on-site construction.
[0036] like Figure 2 As shown, a connecting pipe 8 is provided between two adjacent drain pipes 2, and both ends of the connecting pipe 8 are provided with inserts 81 for the drain pipe 2 to be inserted. A locking hook 82 is provided at the end of the insert 81, and a locking ring 83 is provided on the outer wall of the drain pipe 2 for the locking hook 82 to be hooked.
[0037] When connecting the drain pipe 2, insert the drain pipe 2 into the insertion tube 81 at the end of the connecting pipe 8. At this time, the locking hook 82 on the insertion tube 81 automatically pops open and hooks the locking ring 83 on the drain pipe 2, realizing the rapid fixation between adjacent drain pipes 2 and improving the construction progress.
[0038] like Figure 4 , Figure 5 As shown, the end of the drain pipe 2 is used to insert into the seepage well, and the outer wall of the drain pipe 2 is provided with a limiting plate 9 that abuts against the inner wall of the seepage well.
[0039] like Figure 5 As shown, the limiting plate 9 includes a pair of stop bars 91 and a pair of retaining rings 92. The stop bars 91 are used to abut against the inner wall of the seepage well. The retaining rings 92 are disposed on the stop bars 91 and are semi-circular in shape, and are used to fasten to the outer wall of the drainage pipe 2. One end of the retaining ring 92 is provided with a hook 93, and the other end is provided with a hole 94 for the hook 93 to pass through.
[0040] When connecting the drain pipe 2 and the seepage well, insert the drain pipe 2 into the seepage well, then remove the limiting plate 9 so that a pair of retaining rings 92 tighten the outer wall of the drain pipe 2. At the same time, use the cooperation of the hook 93 and the hole 94 to tighten and fix the retaining rings 92 onto the drain pipe 2. Meanwhile, the stop bar 91 abuts against the inner wall of the seepage well to prevent the drain pipe 2 from moving and ensure that the seepage water can be stably collected and discharged into the seepage well.
[0041] The specific embodiments are merely explanations of this utility model and are not intended to limit it. 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 fall within the scope of the claims of this utility model.
Claims
1. A foundation pit drainage blind ditch structure, characterized in that: include: The trench (1) is excavated at the bottom of the foundation pit; Drainage pipe (2) is installed in the channel (1). The drainage pipe (2) is hollow and has a support body (6) with a triangular cross-section inside. The support body (6) is hollow. Crushed stone backfill (3) is placed in the ditch (1) and wraps around the drainage pipe (2); Geotextile (4) is laid in the trench (1) and wraps the crushed stone backfill (3); A backfill soil layer (5) is placed on top of the trench (1) and covered with the geotextile (4).
2. The foundation pit drainage blind ditch structure according to claim 1, characterized in that: A connecting pipe (8) is provided between two adjacent drain pipes (2), and both ends of the connecting pipe (8) are provided with inserts (81) for the drain pipes (2) to be inserted.
3. The foundation pit drainage blind ditch structure according to claim 2, characterized in that: The end of the insertion tube (81) is provided with a locking hook (82), and the outer wall of the drain pipe (2) is provided with a locking ring (83) for the locking hook (82) to be hooked.
4. The foundation pit drainage blind ditch structure according to claim 1, characterized in that: The outer wall of the drain pipe (2) is wrapped with a filter cloth (7).
5. The foundation pit drainage blind ditch structure according to claim 4, characterized in that: The filter cloth (7) has Velcro (71) that is bonded together on both sides.
6. The foundation pit drainage blind ditch structure according to claim 1, characterized in that: The end of the drain pipe (2) is used to be inserted into the seepage well, and the outer wall of the drain pipe (2) is provided with a limiting plate (9) that abuts against the inner wall of the seepage well.
7. The foundation pit drainage blind ditch structure according to claim 6, characterized in that: The limiting plate (9) includes a pair of stop bars (91) and a pair of retaining rings (92). The pair of stop bars (91) are used to abut against the inner wall of the seepage well. The retaining rings (92) are set on the stop bars (91) and are semi-circular in shape. They are used to fasten to the outer wall of the drainage pipe (2). One end of the retaining ring (92) is provided with a hook (93), and the other end is provided with a hole (94) for the hook (93) to pass through.