Impermeable fill roadbed structure

Abstract

The utility model relates to an impervious fill subgrade structure which comprises a first reinforcing layer, a first impervious layer, a pouring layer, a second reinforcing layer, a solidification layer, a second impervious layer and a third reinforcing layer which are sequentially laid from bottom to top, the first reinforcing layer comprises geotechnical cloth and a plurality of U-shaped fixing rings, and the first impervious layer is of a layered structure formed by laying solidified soil. The pouring layer comprises a single layer or multiple layers of construction waste blocks and construction waste fine particle solidified soil filled in gaps of the construction waste blocks, the second reinforcing layer comprises geotechnical cloth, the solidified layer comprises a single layer or multiple layers of layered structures formed by laying solidified soil prepared from construction waste recycled aggregate, the second impermeable layer is a layered structure formed by laying solidified soil, and the first impermeable layer is a layered structure formed by laying solidified soil. The third reinforcing layer comprises geotechnical cloth and a plurality of U-shaped fixing rings. The roadbed structure is good in structural integrity, high in groundwater infiltration resistance, high in rain wash resistance and higher in strength and rigidity of a filled roadbed, the quality of the roadbed structure is effectively improved, and the instability risk of the roadbed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of road construction, in particular to an anti-seepage filling roadbed structure. Background Art

[0002] Fill roadbed refers to a roadbed project with the top surface higher than the original ground. The roadbed is an important part of the road. The roadbed is the supporting layer of the road structure. It bears the vertical force of the vehicle load transmitted from the road surface and spreads it to the cushion layer and the soil base. Therefore, the roadbed should have sufficient strength, rigidity and stability. Since the roadbed may be infiltrated by groundwater and surface water, its structure should also have sufficient water stability.

[0003] The traditional roadbed structure is a horizontal layered filling structure of earthwork, generally using sandy soil, gravel soil or coarse-grained soil, which is spread in layers under the condition of optimal moisture content, and compacted by mechanical vibration until the compaction degree meets the design requirements, and then the upper layer is spread and compacted until the design height is reached. For example, Chinese patent CN209836710U discloses a fill roadbed structure suitable for seasonal frozen soil areas, including a base layer and a roadbed filling layer, the roadbed filling layer includes a first roadbed filling layer and a second roadbed filling layer, the base layer has a thickness of 30 to 50 cm, a first roadbed filling layer is arranged above the base layer, the first roadbed filling layer has a thickness of 30 cm, a second roadbed filling layer is arranged above the first roadbed filling layer, a permeable geotextile is also laid between the first roadbed filling layer and the base layer, the length of the permeable geotextile is greater than the length of the bottom surface of the first roadbed filling layer, one end of the permeable geotextile is bent upward and laid on one end above the first roadbed filling layer, and the other end is bent upward and laid on the other end above the first roadbed filling layer.

[0004] In the above-mentioned prior art, the lowest base layer is a layer structure paved with slabs or blocks of stone with a particle size of less than 30 cm. The porosity of the base layer after compaction is 20% to 30%, which blocks the groundwater and surface water at the foot of the roadbed from rising to the roadbed soil through capillary water action, thereby ensuring the dryness and overall stability of the roadbed; the permeable geotextile is laid above the base layer to prevent the roadbed filler of the first roadbed filler layer from clogging the pores of the base layer, resulting in the gravel not having the function of blocking capillary water; the permeable geotextile is bent upward, which on the one hand enhances the stability and integrity of the permeable geotextile, and on the other hand prevents water from seeping into the foot of the slope; furthermore, the permeable geotextile has a strong drainage performance, and as a drainage channel in the roadbed, it can effectively discharge the moisture inside the fill. However, the aforementioned roadbed structure has high requirements on soil materials and construction control. Poor soil quality and insufficient compaction will become hidden dangers of the roadbed. When the roadbed is affected by groundwater and precipitation, freeze-thaw disasters, vibration, artificial excavation, etc., the water content in the soil will increase, resulting in a decrease in soil strength. Under the pressure and vibration of driving, the road surface will experience slurrying. In severe cases, the road surface will sink, the roadbed will become unstable, and even the road surface will collapse, causing serious traffic accidents. Utility Model Content

[0005] The utility model is intended to provide an anti-seepage fill roadbed structure to solve the deficiencies in the prior art. The technical problem to be solved by the utility model is achieved through the following technical solutions.

[0006] A seepage-resistant fill roadbed structure comprises a first reinforcement layer, a first anti-seepage layer, a casting layer, a second reinforcement layer, a solidifying layer, a second anti-seepage layer and a third reinforcement layer which are laid in sequence from bottom to top, wherein the first reinforcement layer is laid on the upper surface of the roadbed, the first reinforcement layer comprises a geotextile and a plurality of U-shaped fixing rings, the first anti-seepage layer is a layered structure laid with solidified soil, the casting layer comprises a single layer or multiple layers of construction waste blocks and fine-grained solidified soil of construction waste filled in the gaps between the construction waste, the second reinforcement layer comprises a geotextile, the solidifying layer comprises a single layer or multiple layers of solidified soil prepared from recycled aggregates of construction waste, the second anti-seepage layer is a layered structure laid with solidified soil, and the third reinforcement layer comprises a geotextile and a plurality of U-shaped fixing rings.

[0007] Preferably, the geotextile in the first reinforcement layer is bonded to the upper surface of the roadbed through an oil adhesive layer.

[0008] Preferably, the thickness of the first anti-seepage layer is 200-300 mm.

[0009] Preferably, the thickness of the casting layer is 300-500 mm.

[0010] Preferably, the particle size of the construction waste blocks in the casting layer is 30-50 cm, and the particle size of the construction waste fine-grained solidified soil filled in the gaps between the construction waste blocks is not more than 5 mm.

[0011] Preferably, the thickness of the solidified layer is 300-800 mm.

[0012] Preferably, the particle size of the recycled aggregate from construction waste used to prepare the solidified soil in the solidified layer is no more than 25 mm, and the extension is 200-250 mm.

[0013] Preferably, the 28d compressive strength of the solidified layer is not less than 0.4 MPa.

[0014] Preferably, the thickness of the second anti-seepage layer is 200-300 mm.

[0015] In the utility model, the first reinforcement layer is the connecting layer between the roadbed and the roadbed, which is paved with geotextile and fixed to the roadbed surface by a U-shaped fixing ring, with a thickness of 2mm, which mainly plays the role of reinforcement and reinforcement to prevent the structural damage of the anti-seepage layer caused by uneven settlement of the roadbed, and at the same time has a certain waterproof function; the first anti-seepage layer is a layered structure paved with solidified soil prepared with sandy soil as the base material, and its structure is dense, and its main function is to prevent groundwater from seeping back into the roadbed structure and affecting the stability of the roadbed structure; the casting layer is composed of construction waste blocks with a particle size of 30 to 50cm and construction waste fine-grained solidified soil with a particle size of no more than 5mm, and the mutual embedding force between the construction waste blocks and the construction waste fine-grained solidified soil is used to prevent the settlement of the roadbed and The second reinforcement layer is made of geotextile with a thickness of 2mm, which mainly plays the role of reinforcement to prevent the uneven settlement of the roadbed from forming through cracks; the solidification layer is made of solidified soil prepared with recycled aggregate of construction waste with a particle size not exceeding 25mm as the base material, with a 28d compressive strength of 0.4MPa. It is the load-bearing layer of the roadbed structure and mainly bears vehicle loads; the second anti-seepage layer is a layered structure made of solidified soil prepared with sandy soil as the base material. Its main function is to prevent rainwater from eroding the roadbed structure and affecting the stability of the roadbed structure; the third reinforcement layer is the connecting layer between the second anti-seepage layer and the pavement base, which mainly plays the role of reinforcement to prevent the damage of the pavement base from reflecting on the roadbed structure.

[0016] The utility model provides an anti-seepage fill roadbed structure with good structural integrity, strong resistance to groundwater penetration, strong resistance to rainwater scouring, higher strength and rigidity of the fill roadbed, effectively improving the quality of the roadbed structure and reducing the risk of roadbed instability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] The reference numerals in the accompanying drawings are: 1, first reinforcement layer, 2, first anti-seepage layer, 3, casting layer, 4, second reinforcement layer, 5, solidification layer, 6, second anti-seepage layer, 7, third reinforcement layer. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] A seepage-resistant fill roadbed structure, the improvement of which lies in that it comprises a first reinforcement layer 1, a first impermeable layer 2, a casting layer 3, a second reinforcement layer 4, a solidifying layer 5, a second impermeable layer 6 and a third reinforcement layer 7 which are laid in sequence from bottom to top, wherein the first reinforcement layer 1 is laid on the upper surface of the roadbed, the first reinforcement layer 1 comprises a geotextile and a plurality of U-shaped fixing rings, the first impermeable layer 2 is a layered structure laid by solidified soil, the casting layer 3 comprises a single layer or multiple layers of building waste blocks and fine-grained solidified soil of building waste filled in the gaps between the building waste, the second reinforcement layer 4 comprises a geotextile, the solidifying layer 5 comprises a single layer or multiple layers of solidified soil prepared from recycled aggregates of building waste, the second impermeable layer 6 is a layered structure laid by solidified soil, and the third reinforcement layer 7 comprises a geotextile and a plurality of U-shaped fixing rings.

[0021] In this embodiment, the construction process mainly includes the following steps:

[0022] Step 1: clean the roadbed surface and compact it mechanically;

[0023] Step 2: laying the first reinforcement layer 1, laying the geotextile on the roadbed surface, tightly bonding and fixing the geotextile to the roadbed surface through the adhesive layer, and further fixing the geotextile to the roadbed surface through a U-shaped fixing ring;

[0024] Step 3: Lay the first anti-seepage layer 2, lay the solidified soil on the first reinforcement layer 1 by pumping, and maintain for 2 to 3 days after the construction is completed;

[0025] Step 4: Lay the pouring layer 3, evenly lay the construction waste blocks with a particle size of 30 to 50 cm on the second impermeable layer 2, which can be laid in a single layer or multiple layers, with each layer not exceeding 50 cm. After the laying is completed, use pumping equipment to pour the highly fluid construction waste fine-grained solidified soil into the gaps of the construction waste blocks, and maintain for 2 to 3 days after each layer is completed;

[0026] Step 5: Lay the second reinforcement layer 4, and after the pouring layer 3 is constructed as a whole, maintain for 12 to 24 hours. After the initial setting and before the final setting, lay the geotextile so that the geotextile is bonded to the pouring layer 3, and then maintain for 1 to 2 days.

[0027] Step 6: Lay the solidified layer 5, and construct it in layers by pumping equipment. The pouring thickness of each layer is not more than 500mm, and each layer is cured for 2 to 3 days after construction.

[0028] Step 7: Lay the second anti-seepage layer 6, lay the solidified soil on the top of the solidified layer 5 by pumping, and maintain for 2 to 3 days after the construction is completed;

[0029] Step eight, laying the third reinforcement layer 7, curing the second anti-seepage layer 6 for 12 to 24 hours after construction, laying the geotextile after initial setting and before final setting so that the geotextile is bonded to the second anti-seepage layer 6, and then curing for 7 days.

[0030] In this embodiment, the first reinforcement layer 1 is the connecting layer between the roadbed and the roadbed. It is paved with geotextile and fixed to the roadbed surface by a U-shaped fixing ring. The thickness is 2mm. It mainly plays the role of reinforcement and reinforcement to prevent the structural damage of the anti-seepage layer caused by uneven settlement of the roadbed. At the same time, it has a certain waterproof function; the first anti-seepage layer 2 is a layered structure paved with solidified soil prepared with sandy soil as the base material. Its structure is dense. Its main function is to prevent groundwater from seeping back into the roadbed structure and affecting the stability of the roadbed structure; the casting layer 3 is composed of construction waste blocks with a particle size of 30 to 50 cm and construction waste fine-grained solidified soil with a particle size of no more than 5 mm. The mutual embedding force between the construction waste blocks and the construction waste fine-grained solidified soil is used to prevent the settlement of the roadbed and Secondary utilization is more environmentally friendly and can reduce project costs; the second reinforcement layer 4 is paved with geotextile with a thickness of 2mm, which mainly plays the role of reinforcement and reinforcement to prevent uneven settlement of the roadbed from forming through cracks; the solidification layer 5 is paved with solidified soil prepared with recycled aggregate from construction waste with a particle size not exceeding 25mm as the base material, and the 28d compressive strength reaches 0.4MPa. It is the load-bearing layer of the roadbed structure and mainly bears vehicle loads; the second anti-seepage layer 6 is a layered structure paved with solidified soil prepared with sandy soil as the base material, and its main function is to prevent rainwater from eroding the roadbed structure and affecting the stability of the roadbed structure; the third reinforcement layer 7 is the connecting layer between the second anti-seepage layer 6 and the pavement base, which mainly plays the role of reinforcement and reinforcement to prevent the damage of the pavement base from being reflected to the roadbed structure.

[0031] The present embodiment provides an anti-seepage fill roadbed structure with good structural integrity, strong resistance to groundwater penetration, strong resistance to rainwater erosion, and higher strength and rigidity of the fill roadbed, which effectively improves the quality of the roadbed structure and reduces the risk of roadbed instability.

[0032] Furthermore, the geotextile in the first reinforcement layer 1 is bonded to the upper surface of the roadbed through an oil adhesive layer.

[0033] Furthermore, the thickness of the first anti-seepage layer 2 is 200-300 mm.

[0034] Furthermore, the thickness of the casting layer 3 is 300-500 mm.

[0035] Furthermore, the particle size of the construction waste blocks in the casting layer 3 is 30-50 cm, and the particle size of the construction waste fine-grained solidified soil filled in the gaps between the construction waste blocks is not greater than 5 mm.

[0036] Furthermore, the thickness of the solidified layer 5 is 300-800 mm.

[0037] Furthermore, the particle size of the recycled aggregate from construction waste used to prepare the solidified soil in the solidified layer 5 is not greater than 25 mm, and the extension is 200-250 mm.

[0038] Furthermore, the 28d compressive strength of the solidified layer 5 is not less than 0.4 MPa.

[0039] Furthermore, the thickness of the second anti-seepage layer 6 is 200-300 mm.

[0040] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments described in the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0043] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0044] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0045] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An anti-seepage fill roadbed structure, characterized in that: The invention comprises a first reinforcing layer (1), a first impermeable layer (2), a casting layer (3), a second reinforcing layer (4), a solidifying layer (5), a second impermeable layer (6) and a third reinforcing layer (7) which are laid in sequence from bottom to top. The first reinforcing layer (1) is laid on the upper surface of the roadbed. The first reinforcing layer (1) comprises a geotextile and a plurality of U-shaped fixing rings. The first impermeable layer (2) is a layered structure laid with solidified soil. The casting layer (3) comprises a single layer or multiple layers of building waste blocks and fine-grained solidified soil of building waste filled in the gaps between the building waste. The second reinforcing layer (4) comprises a geotextile. The solidifying layer (5) comprises a single layer or multiple layers of solidified soil prepared from recycled aggregates of building waste. The second impermeable layer (6) is a layered structure laid with solidified soil. The third reinforcing layer (7) comprises a geotextile and a plurality of U-shaped fixing rings.

2. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The geotextile in the first reinforcement layer (1) is bonded to the upper surface of the roadbed via an oil adhesive layer.

3. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The thickness of the first anti-seepage layer (2) is 200-300 mm.

4. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The thickness of the casting layer (3) is 300-500 mm.

5. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The particle size of the construction waste blocks in the casting layer (3) is 30 to 50 cm, and the particle size of the construction waste fine-grained solidified soil filled in the gaps between the construction waste blocks is no more than 5 mm.

6. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The thickness of the solidified layer (5) is 300 to 800 mm.

7. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The particle size of the recycled aggregate from construction waste used to prepare the solidified soil in the solidified layer (5) is no more than 25 mm, and the extension is 200 to 250 mm.

8. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The 28d compressive strength of the solidified layer (5) is not less than 0.4 MPa.

9. The anti-seepage fill roadbed structure according to claim 1, characterized in that: The thickness of the second anti-seepage layer (6) is 200-300 mm.

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