Roadbed structure for preventing uneven deformation of glutenite roadbed

Abstract

The utility model relates to a roadbed structure for preventing uneven deformation of a glutenite roadbed. The roadbed structure comprises a gravel base; the first light soil layer is arranged on the top surface of the gravel base; the first waterproof layer is located on the side, away from the first light soil layer, of the gravel base; the second light soil layer is arranged on the side, away from the first light soil layer, of the first waterproof layer. The first waterproof layer is laid on the top face of the gravel base, so that water can be reduced or prevented from flowing into the gravel base as much as possible, sandy conglomerate is prevented from being disintegrated in the moisture change process, and under the action of the first light soil layer and the second light soil layer, the waterproof performance of the top face of the gravel base can be further enhanced; the problem that in the prior art, glutenite is used as roadbed filler, and after the coupling effect of vehicles and climate is borne in the long-term service process of a road, the roadbed deforms unevenly is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geotechnical engineering and highway engineering, in particular to a roadbed structure for preventing uneven deformation of a sandy gravel roadbed. BACKGROUND

[0002] With the further development of highway construction in China, the construction of highways in mountainous areas is gradually increasing, and a large amount of sandy gravel is produced during excavation in some areas. In order to save construction costs, the roadbed filler is usually selected nearby, but the sandy gravel is usually in a medium weathered and strongly weathered state. If the sandy gravel is used as a roadbed filler, the filler may disintegrate and other phenomena occur after being subjected to the coupling effect of vehicles and climate during the long-term service of the road, thereby causing uneven deformation of the roadbed. SUMMARY

[0003] The present application provides a roadbed structure for preventing uneven deformation of a sandy gravel roadbed, which can solve the problem of uneven deformation of the roadbed caused by the disintegration of the filler after being subjected to the coupling effect of vehicles and climate during the long-term service of the road when the sandy gravel is used as a roadbed filler in the related art.

[0004] In a first aspect, an embodiment of the present application provides a roadbed structure for preventing uneven deformation of a sandy gravel roadbed, which comprises: a sandy gravel base; a first lightweight soil layer arranged on the top surface of the sandy gravel base; a first waterproof layer arranged on the side of the sandy gravel base away from the first lightweight soil layer; and a second lightweight soil layer arranged on the side of the first waterproof layer away from the first lightweight soil layer.

[0005] In combination with the first aspect, in an embodiment, the sandy gravel base further comprises a slope surface, and the slope surface is provided with a second waterproof layer.

[0006] In combination with the first aspect, in an embodiment, a third lightweight soil layer is arranged between the slope surface and the second waterproof layer.

[0007] In combination with the first aspect, in an embodiment, a fourth lightweight soil layer is arranged on the side of the second waterproof layer away from the third lightweight soil layer.

[0008] In combination with the first aspect, in an embodiment, the thickness of the fourth lightweight soil layer is less than the thickness of the second lightweight soil layer.

[0009] In combination with the first aspect, in an embodiment, the thickness of the fourth lightweight soil layer is greater than the thickness of the third lightweight soil layer.

[0010] In combination with the first aspect, in an embodiment, the first waterproof layer is made of a geomembrane.

[0011] With reference to the first aspect, in an implementation form, the first lightweight soil layer and the second lightweight soil layer each comprises a foaming agent and cement.

[0012] With reference to the first aspect, in an implementation form, the first lightweight soil layer and the second lightweight soil layer each further comprises slag.

[0013] With reference to the first aspect, in an implementation form, the second lightweight soil layer has a thickness of 0.2-0.5m.

[0014] The technical scheme provided by the embodiments of the present application has the following beneficial effects:

[0015] By laying the first waterproof layer on the top surface of the gravel base, water flow into the gravel base can be reduced or avoided as much as possible, and the gravel rock can be prevented from disintegrating during water change. Under the action of the first lightweight soil layer and the second lightweight soil layer, the waterproof property of the top surface of the gravel base can be further enhanced, and the problem of uneven deformation of the gravel rock roadbed caused by the coupling effect of vehicles and climate during the long-term service of the road in the related art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The cross-sectional structure diagram of the roadbed structure for preventing uneven deformation of gravel rock roadbed provided by the embodiments of the present application.

[0018] In the drawings:

[0019] 1, gravel base; 11, top surface; 12, slope surface;

[0020] 2, first lightweight soil layer;

[0021] 3, first waterproof layer;

[0022] 4, second lightweight soil layer;

[0023] 5, second waterproof layer;

[0024] 6, third lightweight soil layer;

[0025] 7, fourth lightweight soil layer. DETAILED DESCRIPTION

[0026] In the following well-known description of the embodiments of this application with reference to the accompanying drawings, the technical solutions in the embodiments of this application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of this application.

[0027] The roadbed structure for preventing uneven deformation of sandstone roadbed provided by the embodiments of this application can solve the problem that, in the related art, when sandstone is used as roadbed filler, the filler may disintegrate after being subjected to the coupling action of vehicles and climate during the long-term service of the road, thereby causing uneven deformation of the roadbed.

[0028] Referring to Figure 1 As shown in the figure, the roadbed structure for preventing uneven deformation of sandstone roadbed provided by the embodiments of this application can include: a sandstone base 1, which can be a base filled with sandstone; a first lightweight soil layer 2, which is arranged on the top surface 11 of the sandstone base 1; a first waterproof layer 3, which is located on the side of the sandstone base 1 away from the first lightweight soil layer 2; and a second lightweight soil layer 4, which is arranged on the side of the first waterproof layer 3 away from the first lightweight soil layer 2, i.e., the first lightweight soil layer 2 and the second lightweight soil layer 4 are arranged on opposite sides of the first waterproof layer 3, which can protect the first waterproof layer 3 and further improve the waterproof performance of the top surface 11 of the sandstone base.

[0029] The first waterproof layer 3 arranged on the top surface 11 of the sandstone base can reduce or avoid water flowing into the sandstone base as much as possible, reduce or prevent the sandstone in the sandstone base from disintegrating during the change of water content, and further improve the waterproof performance of the top surface 11 of the sandstone base under the action of the first lightweight soil layer 2 and the second lightweight soil layer 4. In addition, the first waterproof layer 3 arranged between the first lightweight soil layer 2 and the second lightweight soil layer 4 can protect the first waterproof layer 3. When the roadbed is completed and needs to be rolled and compacted, the sandstone in the sandstone base can not only prevent the first waterproof layer 3 from being pierced, but also avoid damaging the first waterproof layer 3 by other structures on the surface layer of the roadbed, thereby ensuring the integrity of the first waterproof layer 3. Further, to improve the waterproof performance of the structures on the top surface 11 of the sandstone base, the first lightweight soil layer 2, the first waterproof layer 3, and the second lightweight soil layer 4 can be fully arranged on the top surface 11 of the sandstone base, thereby solving the problem that, in the related art, when sandstone is used as roadbed filler, the filler may disintegrate after being subjected to the coupling action of vehicles and climate during the long-term service of the road, thereby causing uneven deformation of the roadbed.

[0030] In some alternative embodiments, the gravel foundation further comprises a slope surface 12, and the slope surface 12 is provided with a second waterproof layer 5. It should be understood that the slope surface 12 can refer to a slope surface of the roadbed in the related art, and the slope surface 12 can be provided on both sides of the top surface 11 of the gravel foundation, and the slope surface 12 has a certain angle with the ground, so as to reduce the possibility of water flowing from the side of the gravel foundation into the interior of the gravel foundation and then affecting the gravel. The second waterproof layer 5 is also provided on the slope surface 12, so as to further enhance the waterproof effect of the entire gravel foundation. Preferably, the second waterproof layer 5 can be made of the same material as the first waterproof layer 3, or can be made of different materials.

[0031] In some alternative embodiments, a third lightweight soil layer 6 is arranged between the slope surface 12 and the second waterproof layer 5, that is, the third lightweight soil layer 6 can be arranged between the second waterproof layer 5 and the slope surface 12 to protect the second waterproof layer 5 from being damaged and ensure the integrity of the second waterproof layer 5. Preferably, a fourth lightweight soil layer 7 is arranged on the side of the second waterproof layer 5 away from the third lightweight soil layer 6, so that the second waterproof layer 5 is arranged between the third lightweight soil layer 6 and the fourth lightweight soil layer 7, so as to further protect the second waterproof layer 5 and further enhance the waterproof property of the slope surface 12.

[0032] In some alternative embodiments, the thickness of the fourth lightweight soil layer 7 is less than the thickness of the second lightweight soil layer 4. The second lightweight soil layer 4 is arranged on the top surface 11 of the gravel foundation, and the vehicle can bear more load from the vehicle during the driving process on the roadbed, while the fourth lightweight soil layer 7 bears less load during the driving process of the vehicle. Therefore, the thickness of the second lightweight soil layer 4 can be set to be relatively thick, so that the roadbed can effectively reduce the dynamic stress in the interior of the gravel foundation 1 during the operation period, and reduce the possibility of uneven deformation of the gravel foundation. Under the premise of meeting the waterproof and protection functions, the fourth lightweight soil layer 7 is arranged to be relatively thin, so as to effectively save the use of materials and save the construction cost. In some other embodiments, the thickness of the third lightweight soil layer 6 and the fourth lightweight soil layer 7 can be less than the thickness of the first lightweight soil layer 2 and the second lightweight soil layer 4. It should be noted that the thickness of the first lightweight soil layer 2 and the second lightweight soil layer 4 can refer to the height in the direction perpendicular to the top surface 11 of the gravel foundation, while the thickness of the third lightweight soil layer 6 and the fourth lightweight soil layer 7 can refer to the height in the direction perpendicular to the slope surface 12 of the gravel foundation.

[0033] Preferably, the fourth lightweight soil layer 7 has a thickness greater than that of the third lightweight soil layer 6. The fourth lightweight soil layer 7 is located at the outermost side, and setting a relatively thick thickness of the fourth lightweight soil layer 7 can further protect the second waterproof layer 5 from being damaged by external gravel or other sundries. The third lightweight soil layer 6 is arranged between the second waterproof layer 5 and the slope surface 12, and the slope surface 12 is subjected to a smaller load during the operation period of the roadbed. Therefore, the third lightweight soil layer 6 has a relatively thin thickness to meet the protection requirement of the second waterproof layer 5. Thus, setting the thickness of the fourth lightweight soil layer 7 to be greater than that of the third lightweight soil layer 6 can further save costs.

[0034] In some optional embodiments, the first waterproof layer 3 is made of a geomembrane. In the embodiments of the present application, the first waterproof layer 3 and the second waterproof layer 5 are made of the same waterproof material, which can be a geomembrane. The geomembrane can be one or more of an HDPE geomembrane (high-density polyethylene geomembrane), an LDPE geomembrane (low-density polyethylene geomembrane), an LLDPE geomembrane (linear low-density polyethylene geomembrane), an EVA geomembrane, a PVC geomembrane, a rough-surface geomembrane, or a composite geomembrane.

[0035] In some optional embodiments, the first lightweight soil layer 2 and the second lightweight soil layer 4 each include a foaming agent and cement. The use of the foaming agent can reduce the use of cement. The foaming agent can cause a large number of bubbles in the cement to form foamed lightweight soil, thereby significantly reducing the density and weight of the concrete. The foamed lightweight soil can be directly produced on the construction site without a complex production process, thereby enhancing the convenience of the construction process. Under the protection of the foamed lightweight soil, the geomembrane will not be punctured by stones, thereby ensuring the waterproofness of the structure. The foamed lightweight soil also has the advantages of light weight and high strength. Preferably, the first lightweight soil layer 2 and the second lightweight soil layer 4 each further include slag. Mixing slag into the foaming agent and cement can further save the construction cost. The foamed lightweight soil made of the foaming agent, cement, and slag has the advantages of environmental protection, light weight, high strength, good fluidity, and heat preservation. In some other embodiments, the first lightweight soil layer 2 and the second lightweight soil layer 4 can also be made of other materials, such as clay. Further, the first lightweight soil layer 2, the second lightweight soil layer 4, the third lightweight soil layer 6, and the fourth lightweight soil layer 7 can be made of the same material to reduce the material re-dispensing process.

[0036] In some optional embodiments, the second lightweight soil layer 4 has a thickness of 0.2-0.5 m. It should be understood that the working depth of the roadbed can refer to the effective influence range of the vehicle load. Setting the thickness of the second lightweight soil layer 4 to be 0.2-0.5 m can reduce the influence of the vehicle load on the gravel base 1 during vehicle driving, thereby prolonging the service life of the entire roadbed.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] It should be noted that in the present application, relational terms such as "first" and "second", and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0039] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A roadbed structure for preventing uneven deformation of a sandy rock roadbed, characterized by, It comprises: a gravel base (1); a first light soil layer (2) provided on a top surface (11) of the gravel base (1); a first waterproof layer (3) provided on a side of the gravel base (1) away from the first light soil layer (2); a second light soil layer (4) provided on a side of the first waterproof layer (3) away from the first light soil layer (2).

2. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 1, characterized in that: the gravel base (1) further comprises a side slope surface (12) provided with a second waterproof layer (5).

3. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 2, characterized in that: a third light soil layer (6) is provided between the side slope surface (12) and the second waterproof layer (5).

4. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 3, characterized in that: a fourth light soil layer (7) is provided on a side of the second waterproof layer (5) away from the third light soil layer (6).

5. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 4, characterized in that: a thickness of the fourth light soil layer (7) is less than a thickness of the second light soil layer (4).

6. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 4, characterized in that: a thickness of the fourth light soil layer (7) is greater than a thickness of the third light soil layer (6).

7. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 1, characterized in that: the first waterproof layer (3) is a geomembrane.

8. The subgrade structure for preventing uneven deformation of a gravel subgrade according to claim 1, characterized in that: a thickness of the second light soil layer (4) is 0.2-0.5 m.

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