Soft soil roadbed drainage structure

Abstract

The utility model discloses a soft soil roadbed drainage structure, and particularly relates to the technical field of road engineering, which comprises a soft soil roadbed base body, and further comprises a trapezoidal engineering gravel layer and a tamped clay layer which are sequentially arranged above the soft soil roadbed base body along the vertical direction, anti-seepage geotechnical cloth is paved on the tamped clay layer, a fine sand layer is paved on the anti-seepage geotechnical cloth, and a waterproof layer is paved on the fine sand layer. A first gravel layer is laid on the fine sand layer, and a permeable asphalt layer is laid on the first gravel layer. According to the drainage structure provided by the utility model, the supporting strength of a road is improved by utilizing a trapezoid formed by the engineering gravel layer and the tamped clay layer, and meanwhile, the anti-seepage geotechnical cloth has an anti-seepage effect, so that the problem that the engineering gravel layer and the tamped clay layer are collapsed due to rainwater seepage is solved; the shear strength is improved through the fine sand layer and the first gravel layer, and water permeating through the permeable asphalt layer, the fine sand layer and the first gravel layer flows along the anti-seepage geotechnical cloth and is drained to the two sides of the road, so that rainwater on the road surface is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to road engineering technical field, specifically related to a soft soil roadbed drainage structure. BACKGROUND

[0002] Soft soil roadbed refers to the roadbed structure with soft soil as the main bearing material. In civil engineering, soft soil usually refers to soil types with high water content and low shear strength, such as silt, clay or saturated sand. Such soil will exhibit low bearing capacity and large deformation characteristics in the natural state, so special treatment and design are needed when building roads, bridges and other projects.

[0003] According to patent announcement No. CN220704224U, announcement date: 2024-04-02, a soft soil roadbed drainage structure is disclosed, which comprises a road base body, a drainage ditch is arranged inside the road base body, and installation assemblies are arranged inside and outside the drainage ditch; the installation assembly comprises a first jack on the front surface of the drainage ditch, a second jack is arranged on the front surface of the drainage ditch, a sealing gasket is fixedly connected to the front surface of the drainage ditch, a first insertion rod is fixedly connected to the back surface of the drainage ditch, a second insertion rod is fixedly connected to the back surface of the drainage ditch, a fixed block is fixedly connected to the outer surface of the drainage ditch, a connecting plate is arranged on the outer surface of the drainage ditch, a bolt is threadedly connected to one side of the connecting plate close to the drainage ditch, a threaded hole is formed in the outer surface of the drainage ditch, an auxiliary rod is fixedly connected to one side of the connecting plate close to the drainage ditch, a spring is fixedly connected inside the connecting plate, a sliding plate is fixedly connected to one side of the spring close to the fixed block, a clamping rod is fixedly connected to one side of the sliding plate close to the fixed block, a clamping groove is formed in the fixed block, and a clamping pin is clamped in the drainage ditch.

[0004] In the prior art including the above patent, the use and treatment of soft soil roadbed at present are mostly by re-paving relatively hard and higher shear strength gravel, concrete, asphalt road, etc. on it, or by strengthening the drainage and water removal of the soft soil roadbed, so as to reduce the collapse degree of the soft soil roadbed in rainy days. However, this conventional method still causes the road surface applied to the soft soil to be affected by rainwater and produce settlement, thereby affecting the quality of the road surface. Utility model content

[0005] The utility model aims to provide a soft soil roadbed drainage structure, which improves the drainage and water removal strength of the soft soil roadbed, thereby reducing the influence of rain on the soft soil roadbed.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a soft soil roadbed drainage structure, including soft soil roadbed body, still including engineering broken stone layer and rammed clay layer which are arranged in vertical direction in turn and are trapezoidal above soft soil roadbed body, the impervious geotextile is laid on rammed clay layer, the fine sand layer is laid on the impervious geotextile, and the first broken stone layer is laid on fine sand layer, and the water permeable asphalt layer is laid on the first broken stone layer.

[0007] As preferred, the impervious geotextile is covered on the trapezoidal two sides of the engineering broken stone layer and the rammed clay layer.

[0008] As preferred, the soft soil roadbed body is excavated with a drainage groove on the two sides of the engineering broken stone layer respectively, and the impervious geotextile is laid in the drainage groove.

[0009] As preferred, the soft water permeable pipe is laid in the drainage groove.

[0010] As preferred, the geogrid is laid on the impervious geotextile on the trapezoidal two sides of the engineering broken stone layer and the rammed clay layer, and the second broken stone layer is laid on the geogrid.

[0011] As preferred, the third broken stone layer is laid in the drainage groove.

[0012] As preferred, the soft soil roadbed body is excavated with a plurality of earthworks at equal intervals, and the coarse stone layer is filled in the earthwork respectively.

[0013] As preferred, the cement pipe is laid in the soft soil roadbed body.

[0014] As preferred, one end of the cement pipe is located in the coarse stone layer, and the second end of the cement pipe is fixedly connected with the observation pipe.

[0015] As preferred, the curb is arranged on the two sides of the water permeable asphalt layer.

[0016] In the above technical scheme, the soft soil roadbed drainage structure provided by the utility model has the following beneficial effects: the trapezoidal shape formed by the engineering broken stone layer and the rammed clay layer improves the support strength of the road, the impervious geotextile avoids the problem that the engineering broken stone layer and the rammed clay layer are collapsed by rainwater penetration, the fine sand layer and the first broken stone layer further improve the flatness and shear strength of the road surface, the fine sand layer avoids the first broken stone layer from breaking the impervious geotextile, the water permeable asphalt layer is used as the road surface to improve the quality of the road surface, reduce the generation of dust, and the water permeated by the water permeable asphalt layer, the fine sand layer and the first broken stone layer flows along the impervious geotextile and is discharged to the two sides of the road, thereby further reducing the degree of road surface collapse. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 The overall cross-sectional structure schematic diagram provided by the embodiments of the present application is shown in the figure.

[0019] Figure 2 The partial cross-sectional structure schematic diagram provided by the embodiments of the present application is shown in the figure.

[0020] Figure 3 The A place enlarged structure schematic diagram provided by the embodiments of the present application is shown in the figure.

[0021] Figure 4 The B place enlarged structure schematic diagram provided by the embodiments of the present application is shown in the figure.

[0022] Explanation of the figure mark:

[0023] 1, soft soil roadbed body; 2, anti-seepage geotextile; 3, curb stone; 4, cement pipe; 5, soft type water permeable pipe; 11, coarse stone layer; 12, engineering broken stone layer; 13, rammed clay layer; 14, fine sand layer; 15, first broken stone layer; 16, water permeable asphalt layer; 31, second broken stone layer; 32, geogrid; 33, third broken stone layer; 41, observation tube. Specific implementation

[0024] In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail below in combination with the drawings.

[0025] As Figures 1-4As shown in the first aspect, a soft soil subgrade drainage structure includes a soft soil subgrade body 1, and further includes an engineering gravel layer 12 and a rammed clay layer 13 arranged in sequence in a vertical direction above the soft soil subgrade body 1 and forming a trapezoid, an impermeable geotextile 2 laid on the rammed clay layer 13, a fine sand layer 14 laid on the impermeable geotextile 2, a first gravel layer 15 laid on the fine sand layer 14, and a permeable asphalt layer 16 laid on the first gravel layer 15. The trapezoid formed by the engineering gravel layer 12 and the rammed clay layer 13 improves the support strength of the road, and the impermeable geotextile 2 prevents the engineering gravel layer 12 and the rammed clay layer 13 from being eroded by rainwater and collapsing. The fine sand layer 14 and the first gravel layer 15 further improve the flatness and shear strength of the road surface, and the fine sand layer 14 prevents the first gravel layer 15 from damaging the impermeable geotextile 2. The permeable asphalt layer 16 is used as the road surface to improve the quality of the road surface, reduce dust generation, and allow water to permeate through the permeable asphalt layer 16, the fine sand layer 14, and the first gravel layer 15, flow along the impermeable geotextile 2, and be discharged to both sides of the road, thereby further reducing the degree of road surface collapse.

[0026] As further provided by the present application, the impermeable geotextile 2 is arranged on both sides of the trapezoid formed by the engineering gravel layer 12 and the rammed clay layer 13.

[0027] Specifically, as shown in the first aspect, Figure 1 and Figure 3 the impermeable geotextile 2 is arranged on both sides of the trapezoid to further allow rainwater on the road surface to flow along the surface of the impermeable geotextile 2 and flow to a low-lying area, thereby reducing the impact of rainwater on the road.

[0028] Further, the soft soil subgrade body 1 is excavated to form drainage channels on both sides of the engineering gravel layer 12, and the impermeable geotextile 2 is laid in the drainage channels.

[0029] Specifically, the impermeable geotextile 2 is laid in the drainage channels to allow water discharged into the drainage channels to be drained, and the impermeable geotextile 2 prevents water from permeating.

[0030] Further, a soft permeable pipe 5 is laid in the drainage channels.

[0031] Specifically, the soft permeable pipe 5 can drain water and prevent the drainage channels from being clogged.

[0032] Furthermore, a geogrid 32 is laid on the impermeable geotextile 2 on both sides of the trapezoid formed by the engineering gravel layer 12 and the rammed clay layer 13, and a second gravel layer 31 is laid on the geogrid 32.

[0033] Specifically, the engineering gravel layer 12 and the rammed clay layer 13 on both sides of the trapezoid are protected by the geogrid 32 and the second gravel layer 31 on the geogrid 32, and the rainwater infiltrating along the second gravel layer 31 can flow into the drainage groove along the impermeable geotextile 2.

[0034] Further, the third gravel layer 33 is laid in the drainage groove.

[0035] Specifically, the soft permeable pipe 5 is covered and protected by the third gravel layer 33.

[0036] Further, a plurality of earthworks are excavated at equal intervals on the soft soil subgrade body 1, and the earthworks are respectively filled with the coarse stone layer 11.

[0037] Specifically, the coarse stone layer 11 is used to further enhance the subgrade strength of the soft soil subgrade body 1.

[0038] Further, a plurality of cement pipes 4 are laid in the soft soil subgrade body 1.

[0039] Specifically, the cement pipe 4 can enhance the subgrade strength of the soft soil subgrade body 1.

[0040] Further, one end of the cement pipe 4 is located in the coarse stone layer 11, and the second end of the cement pipe 4 is fixedly connected with the observation pipe 41.

[0041] Specifically, when the water in the soft soil subgrade body 1 is collected in the coarse stone layer 11, the water flows into the cement pipe 4 for collection, and then the water content in the cement pipe 4 is observed through the observation pipe 41, so as to facilitate subsequent drainage work and reduce the water content of the soft soil subgrade body 1.

[0042] Further, the two sides of the permeable asphalt layer 16 are provided with the curb 3.

[0043] Specifically, the curb 3 can limit the permeable asphalt layer 16.

[0044] Working principle: through the use of engineering gravel layer 12 and rammed clay layer 13 formed by the trapezoidal to enhance the support strength of the road, while the impermeable geotextile 2 plays a role in the effect of seepage prevention to avoid engineering gravel layer 12 and rammed clay layer 13 by rainwater infiltration subsidence problem, and through the fine sand layer 14 and the first gravel layer 15 to further improve the flatness and shear strength of the road, fine sand layer 14 to avoid the first gravel layer 15 knock the impermeable geotextile 2, and then use the permeable asphalt layer 16 as the road surface to improve the quality of the road surface, reduce the generation of dust, while the water permeable asphalt layer 16, fine sand layer 14 and the first gravel layer 15, along the impermeable geotextile 2 upflow and discharge to both sides of the road, so as to further reduce the degree of road subsidence. At the same time, when the water in the soft soil subgrade body 1 is stored in the coarse stone layer 11, at this time the water flows into the cement pipe 4 for collection, and then the observation pipe 41 is observed to check the water content in the cement pipe 4, so as to facilitate the subsequent drainage work and reduce the water content of the soft soil subgrade body 1.

[0045] The above only describes certain exemplary embodiments of the present application by way of illustration, without doubt, for those skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A soft soil subgrade drainage structure comprising a soft soil subgrade body (1), characterized by, The soft soil roadbed body (1) is provided with an engineering gravel layer (12) and a rammed clay layer (13) arranged in sequence in the vertical direction and in a trapezoidal shape above the soft soil roadbed body (1), the rammed clay layer (13) is provided with a seepage-proof geotextile (2) laid thereon, the seepage-proof geotextile (2) is provided with a fine sand layer (14) laid thereon, the fine sand layer (14) is provided with a first gravel layer (15) laid thereon, and the first gravel layer (15) is provided with a permeable asphalt layer (16) laid thereon.

2. The soft soil subgrade drainage structure according to claim 1, characterized in that, The seepage-proof geotextile (2) is arranged on both sides of the trapezoidal engineering gravel layer (12) and the rammed clay layer (13).

3. The soft soil subgrade drainage structure according to claim 1, wherein, The soft soil roadbed body (1) is provided with a drainage groove excavated on both sides of the engineering gravel layer (12), and the seepage-proof geotextile (2) is laid in the drainage groove.

4. The soft soil subgrade drainage structure according to claim 3, wherein, The drainage groove is provided with a soft permeable pipe (5).

5. The soft soil subgrade drainage structure according to claim 1, wherein, The seepage-proof geotextile (2) on both sides of the trapezoidal engineering gravel layer (12) and the rammed clay layer (13) is provided with a geogrid (32), and the geogrid (32) is provided with a second gravel layer (31).

6. The soft soil subgrade drainage structure according to claim 3, wherein, The drainage groove is provided with a third gravel layer (33).

7. The soft soil subgrade drainage structure according to claim 1, wherein, The soft soil roadbed body (1) is provided with a plurality of earthworks excavated at equal intervals, and the earthworks are respectively filled with coarse stone layers (11).

8. The soft soil subgrade drainage structure according to claim 1, wherein, The soft soil roadbed body (1) is provided with a plurality of cement pipes (4).

9. The soft soil subgrade drainage structure according to claim 8, wherein, One end of the cement pipe (4) is located in the coarse stone layer (11), and the second end of the cement pipe (4) is fixedly connected with a viewing pipe (41).

10. The soft soil subgrade drainage structure according to claim 1, wherein, Both sides of the permeable asphalt layer (16) are provided with kerbs (3).

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