Quickly-formed temporarily-built foundation drainage system

Abstract

The utility model discloses a rapidly-formed temporarily-built foundation drainage system which comprises a cushion layer, a backfill layer, a hardened layer, a permeable surface layer, a drainage pipe and a conversion well. The cushion layer is located at the bottom of the groove, and concrete is poured into the cushion layer; the drainage pipe and the conversion well are detachably connected and are arranged on the cushion layer; the backfill layer is arranged on the cushion layer and is flush with the top of the groove, plain soil is backfilled in the backfill layer, and the drainage pipe and the conversion well are wrapped in the backfill layer; the hardened layer is arranged on the backfill layer and covers the top and two side areas of the groove, concrete is poured in the hardened layer, and reinforcing meshes are arranged in the hardened layer; the permeable surface layer is arranged on the hardened layer, and permeable concrete is poured in the permeable surface layer. The drainage system is convenient and fast to construct, does not need mass masonry and grate construction, greatly saves the construction period, is not easy to be blocked by garbage, reduces the maintenance requirement, and prolongs the service life of the drainage system.

Description

Technical Field

[0001] The utility model relates to the field of drainage, in particular to a drainage system for a temporary building foundation formed rapidly. Background Art

[0002] During the construction of temporary building projects, the construction period of the drainage system accounts for a relatively large proportion in the whole project. Since it is a temporary building project, the drainage system is mostly set up as open ditch drainage. During the construction process, not only a large amount of masonry construction is required, but also a large number of gratings need to be set on the top of the trench. The construction period is long, the processes are numerous, the cost is high, and it is also easy to be blocked, affecting the drainage effect and it is difficult to meet the construction period requirements of temporary building projects.

[0003] Therefore, how to create a new drainage system for a temporary building foundation formed rapidly is one of the important research and development topics at present. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a drainage system for a temporary building foundation formed rapidly, which shortens the construction period and improves the drainage effect, thus overcoming the deficiencies of the prior art.

[0005] To solve the above technical problem, the utility model provides a drainage system for a temporary building foundation formed rapidly, including a cushion layer, a backfill layer, a hardening layer, a permeable surface layer, a drain pipe and a conversion well;

[0006] The cushion layer is located at the bottom of the trench, and concrete is poured in the cushion layer;

[0007] The drain pipe and the conversion well are detachably connected and are both placed on the cushion layer;

[0008] The backfill layer is arranged on the cushion layer, with a height flush with the top of the trench. Plain soil is backfilled in the backfill layer and the drain pipe and the conversion well are wrapped therein;

[0009] The hardening layer is arranged on the backfill layer, covering the top and both sides of the trench. Concrete is poured in the hardening layer and a steel mesh is built in;

[0010] The permeable surface layer is arranged on the hardening layer, and permeable concrete is poured in the permeable surface layer.

[0011] As an improvement of the utility model, the conversion well includes support feet, a wellbore, a manhole cover seat and a manhole cover. The support feet, the wellbore and the manhole cover seat are an integrally formed structure by injection molding. 4 support feet are evenly distributed along the circumference of the wellbore. Each support foot is in an L shape, the horizontal section is flush with the bottom of the wellbore, and the vertical section extends to the manhole cover seat.

[0012] Furthermore, the distance between adjacent conversion wells does not exceed 40 meters.

[0013] Further, the drain pipe uses a double corrugated pipe. Water permeable holes are opened at the troughs of the corrugations on the pipe wall, and the pipe wall is coated with a filter fabric.

[0014] Further, both the transition well and the drain pipe are made of HDPE.

[0015] Further, a socket and spigot detachable connection is adopted between the transition well and the drain pipe.

[0016] Further, the thickness of the cushion layer is 50 mm, and the strength grade of the cast concrete is C20.

[0017] Further, a steel bar protection layer is provided in the hardening layer. A finished cushion block is placed inside the steel bar protection layer to reserve a height of 20 mm. A steel bar mesh with a specification of Φ6@200 is laid above the steel bar protection layer. After integral casting and hardening, a hardening layer is formed. The thickness of the hardening layer is 120 mm, and the strength grade of the cast concrete is C20.

[0018] Further, the hardening layer slopes towards the transition well at a slope of 1%.

[0019] Further, the thickness of the permeable surface layer is 50 mm, and the strength grade of the cast concrete is C25.

[0020] After adopting such a design, the utility model has at least the following advantages:

[0021] 1. The utility model comprehensively uses finished HDPE pipes and finished HDPE transition wells, solving the problem of too long construction period caused by a large amount of masonry construction in the traditional open ditch drainage system;

[0022] 2. Compared with the traditional open ditch drainage system, by utilizing the direct water permeability characteristic of the permeable surface layer, a large amount of construction of gratings is not required, further reducing the construction period;

[0023] 3. Due to the good filtering effect of the permeable surface layer, the problem that the traditional open ditch drainage system is easily blocked by garbage is greatly avoided, the maintenance requirement is reduced, and the service life of the drainage system is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above is only an overview of the technical solution of the utility model. In order to be able to understand the technical means of the utility model more clearly, the following further describes the utility model in detail in conjunction with the drawings and specific embodiments.

[0025] Figure 1 is a structural schematic diagram of the utility model.

[0026] Figure 2 is an external effect schematic diagram of the utility model.

[0027] Figure 3It is a schematic structural diagram of a conversion well.

[0028] Figure 4 It is a schematic connection diagram of a conversion well and a drain pipe.

[0029] Explanation of reference numerals: 1, drain pipe; 2, conversion well; 201, support feet; 202, wellbore; 203, manhole cover seat; 204, manhole cover; 3, permeable surface layer; 4, hardened layer; 5, cushion layer; 6, backfill layer. Specific implementation mode

[0030] Please refer to Figures 1 to 4 , the present utility model provides a temporary construction foundation drainage system formed quickly, including a cushion layer 5, a backfill layer 6, a hardened layer 4, a permeable surface layer 3, a drain pipe 1 and a conversion well 2.

[0031] Excavate a trench in the construction site according to the design dimensions. After the trench construction is completed, construct the cushion layer 5. The cushion layer 5 is located at the bottom of the trench, and the thickness of the cushion layer 5 is 50 mm. Concrete with a strength grade of C20 is poured in the layer.

[0032] After the construction of the cushion layer 5 is completed, place the assembled drain pipe 1 and conversion well 2 on the cushion layer 5. Both the drain pipe 1 and the conversion well 2 are finished prefabricated parts made of HDPE material. The connection between the drain pipe 1 and the conversion well 2 adopts a socket-type detachable connection.

[0033] The drain pipe 1 adopts a double corrugated pipe with a diameter of DN300. Permeable holes are opened at the trough positions of the corrugations on the pipe wall, and a layer of filter fabric is wrapped around the outer periphery of the pipe wall. The double corrugated structure can effectively improve the external pressure strength of the drain pipe 1. Opening the permeable holes at the troughs can utilize the dual effects of the wave crests and the filter fabric to ensure smooth water permeability and prevent the orifices from being blocked. The drain pipe 1 is connected to the municipal drainage network.

[0034] The conversion well 2 includes support feet 201, a wellbore 202, a manhole cover seat 203 and a manhole cover 204. The support feet 201, the wellbore 202 and the manhole cover seat 203 are an integrally formed structure by injection molding. The number of support feet 201 is 4, and they are evenly distributed along the circumferential direction of the wellbore 202. Each support foot 201 is in an L shape, the horizontal section is flush with the bottom of the wellbore 202, and the vertical section extends to the manhole cover seat 203. By setting the support feet 201, the conversion well 2 can be placed vertically and stably on the cushion layer 5 without generating slip or tipping, and no additional support is required.

[0035] In this embodiment, the conversion wells 2 are arranged at the designed intervals, and the distance between adjacent conversion wells 2 does not exceed 40 meters.

[0036] The backfill layer 5 is arranged on the cushion layer 6. Plain soil is backfilled in the backfill layer 5 to wrap the drain pipe 1 and the conversion well 2, and the backfill height is flush with the top of the trench.

[0037] The hardened layer 4 is arranged above the backfill layer 5, covering the top and both sides of the trench. A steel bar protection layer is arranged in the hardened layer. The steel bar protection layer is reserved with a height of 20 mm by placing finished cushion blocks. A steel bar mesh with a specification of Φ6@200 is laid above the steel bar protection layer. After laying, integral pouring and hardening are carried out. The strength grade of the poured concrete is C20, and the thickness of the hardened layer 4 is 120 mm. The hardened layer 4 slopes towards the conversion well 2 at a slope of 1%.

[0038] The permeable surface layer 3 is arranged above the hardened layer 4, and permeable concrete with a strength grade of C25 is poured in the layer. The thickness of the permeable surface layer 3 is 50 mm, and the upper surface is flush with the top surface of the manhole cover 204.

[0039] During the construction of the present utility model, flow operation construction is adopted. The construction site is divided into several areas. After the site leveling of one area is completed, the trench excavation and the pouring of the cushion layer 5 in this area are immediately carried out, and at the same time, the site leveling construction of the next area is started; after the construction of the in-trench cushion layer 5 in one area is completed, the installation construction of the conversion well 2 and the pipeline 1 is carried out, and at the same time, the construction of the cushion layer 5 in the next area is carried out; after the installation of the conversion well 2 and the pipeline 1 is completed, the layered backfilling and compaction of the trench and the construction of the hardened layer 4 are carried out, and at the same time, the installation construction of the conversion well 2 and the pipeline 1 in the next area is carried out; after the hardened layer 4 of one area reaches a certain strength, the pouring construction of the permeable surface layer 3 in this area is carried out until the pouring construction of the permeable surface layer 3 in all areas is completed.

[0040] The specific construction steps in each area are as follows:

[0041] S1. According to the on-site plane axis control points and elevation points, measure and set the excavation side lines of the trench. Clean the humus soil, topsoil, turf, etc. on the surface of the original ground. In the filling section, all the tree roots within the base range need to be dug out, and the pits should be filled and compacted according to the design requirements.

[0042] S2. Use an excavator to carry out trench excavation. The width of the trench is 1100 mm, and the depth is the sum of the depth of the conversion well 2 and the height of the cushion layer 5. The trench is excavated from top to bottom. During the excavation process, measures should be taken to ensure the stability of the slope. Before excavating to the slope line, a certain width should be reserved. The reserved width should ensure that the soil layer outside the slope line is not disturbed during the slope brushing process. When excavating to the design elevation, the site leveling construction should be carried out as soon as possible. If it cannot be carried out in time, it is advisable to reserve at least 300 mm thick protective layer above the design elevation. Take temporary drainage measures to ensure that the construction operation surface is not waterlogged. Use machinery for site leveling, and manually repair the uneven parts locally.

[0043] S3. After the trench acceptance is completed, carry out the pouring construction of the in-trench cushion layer 5. Use C20 concrete for pouring, with a thickness of 50 mm.

[0044] After the initial setting of the cushion layer 5, the construction of the pipeline 1 and the conversion well 2 can be carried out. Place the finished conversion well 2 on top of the cushion layer 5 according to the drawing positioning, and connect the drain pipe 1 to the conversion well 2.

[0045] S5. After the connection of a certain length of the drain pipe 1 is completed, the backfill layer 6 construction can be carried out at any time. During backfilling, the soil is backfilled and tamped in layers with a thickness of 300 mm per layer, and the compaction coefficient is not less than 0.94.

[0046] S6. The site hardening is divided into the site hardening outside the trench and the site hardening above the trench (drainage system). The site hardening outside the trench can be carried out after the site is leveled. By placing finished cushion blocks, a 20-mm-thick steel bar protection layer is reserved. After laying a layer of Φ6@200 steel bar mesh, the C20 concrete is pumped by a concrete pump truck for hardening, and the hardening thickness is 120 mm. The site hardening above the trench (drainage system) is carried out after the trench backfill soil is completed and tamped in layers, and the method is the same as above. The hardening layer 4 slopes towards the conversion well at a slope of 1%.

[0047] S7. After the site hardening above the trench (drainage system) is completed, the permeable surface layer 3 construction can be carried out. The permeable surface layer 3 uses C25 permeable concrete with a thickness of 50 mm. The material is unloaded by a wheelbarrow, and after pouring, it is leveled with a cement leveling machine.

[0048] The construction of the utility model is convenient and fast, without a large amount of masonry and grate construction, greatly saving the construction period, not easily blocked by garbage, reducing the need for maintenance, and prolonging the service life of the drainage system.

[0049] The above is only a preferred embodiment of the utility model, and it does not impose any form of limitation on the utility model. Any simple modification, equivalent change or decoration made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the utility model.

Claims

1. A quickly formed drainage system for temporary building foundation, characterized in that It includes a cushion layer, a backfill layer, a hardening layer, a permeable surface layer, a drain pipe and a conversion well; The cushion layer is located at the bottom of the trench, and concrete is poured in the cushion layer; The drain pipe and the conversion well are detachably connected and are both placed on the cushion layer; The backfill layer is arranged on the cushion layer, with a height flush with the top of the trench. Plain soil is backfilled in the backfill layer to wrap the drain pipe and the conversion well; The hardening layer is arranged on the backfill layer, covering the top and both sides of the trench. Concrete is poured in the hardening layer and a steel mesh is built in; The permeable surface layer is arranged on the hardening layer, and permeable concrete is poured in the permeable surface layer.

2. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that The conversion well includes support feet, a wellbore, a manhole cover seat and a manhole cover. The support feet, the wellbore and the manhole cover seat are an integrally injection-molded structure. Four support feet are evenly distributed along the circumference of the wellbore. Each support foot is L-shaped, with the horizontal section flush with the bottom of the wellbore and the vertical section extending to the manhole cover seat.

3. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, The distance between adjacent conversion wells does not exceed 40 meters.

4. A temporary building foundation drainage system formed quickly according to claim 1, characterized in that The drain pipe uses a double corrugated pipe. Water permeable holes are opened at the troughs of the corrugations of the pipe wall, and the pipe wall is wrapped with a filter fabric.

5. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, The materials of the conversion well and the drain pipe both use HDPE.

6. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, The conversion well and the drain pipe are connected in a socket-and-spigot detachable manner.

7. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, The thickness of the cushion layer is 50mm, and the strength grade of the poured concrete is C20.

8. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, A steel bar protection layer is arranged in the hardening layer. A height of 20mm is reserved by placing finished cushion blocks in the steel bar protection layer. A steel mesh with a specification of Φ6@200 is laid above the steel bar protection layer. After integral pouring and hardening, the hardening layer is formed. The thickness of the hardening layer is 120mm, and the strength grade of the poured concrete is C20.

9. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, The hardening layer slopes at a rate of 1% towards the conversion well.

10. A quickly formed drainage system for a temporary building foundation according to claim 1, characterized in that, The thickness of the permeable surface layer is 50mm, and the strength grade of the poured concrete is C25.

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