Roadbed anti-settlement structure

Abstract

The subgrade anti-settlement structure is characterized in that a lower drainage layer has water resistance and is stacked on a cushion layer, and a lower geotechnical grid is arranged on the lower drainage layer; and the upper drainage layer is arranged on the lower geotechnical grid. The structural strip is embedded in the middle of the first rubber strip in the thickness direction and arranged in the width direction of the first rubber strip. According to the roadbed anti-settlement structure provided by the utility model, the strength of the first adhesive tape in the width direction is enhanced through the structural strips, and the structural strength of each grid in the lower geotechnical grids can be enhanced. By means of the lower geotechnical grid with the reinforced structure, the whole strength of the upper drainage layer is guaranteed, meanwhile, the toughness of each grid in the lower geotechnical grid is improved, and the possibility that the upper drainage layer is abnormal in structure is lowered. Reinforcement is achieved through compounding of the upper geotechnical grid, and the structural strength of the pavement layer is improved. Meanwhile, the structural stability of the upper drainage layer is improved, and the sedimentation possibility is reduced.

Description

A roadbed anti-settlement structure Technical Field

[0001] This utility model relates to the field of road structure, and in particular to a roadbed anti-settlement structure. Background Technology

[0002] Subgrade settlement control structures are structural systems designed in road engineering to prevent subgrade settlement or uneven settlement. These structures are typically used to improve subgrade stability, extend road service life, and ensure driving safety and comfort. The design and construction of subgrade settlement control structures are important aspects of civil engineering, especially in areas with soft soil foundations, collapsible loess areas, or other areas with poor geological conditions. The subgrade is the foundation of a road, bearing the loads of the pavement and its superstructure, and transferring them to the foundation. The stability of the subgrade directly affects the overall performance of the road.

[0003] Generally, settlement prevention is achieved through methods such as replacement, reinforced soil technology, pile foundation reinforcement, preloading, and drainage consolidation. Replacement involves excavating unsuitable soil layers and backfilling with high-strength materials (such as sand and gravel) to improve the bearing capacity of the roadbed. Reinforced soil technology involves adding high-strength geosynthetics (such as geogrids and geotextiles) to the roadbed to enhance its overall stability and settlement resistance. Pile foundation reinforcement involves driving piles into soft soil foundations to transfer the load to deeper, more stable soil layers, thereby reducing settlement. Preloading involves applying additional loads before roadbed construction to consolidate the foundation in advance, reducing later settlement. Drainage consolidation involves setting up vertical drainage channels (such as plastic drainage boards and sand wells) to accelerate the drainage of pore water in the foundation, thereby improving the degree of consolidation. However, various settlement prevention technologies still have limitations in terms of complexity and effectiveness. Summary of the Invention

[0004] The main objective of this invention is to provide a roadbed anti-settlement structure, aiming to solve the problem of...

[0005] To achieve the above objectives, this utility model provides a roadbed anti-settlement structure, comprising:

[0006] The roadbed serves as the structural foundation;

[0007] A subbase layer is stacked on the roadbed, the subbase layer having a granular packing structure and a porosity of 4% to 7%;

[0008] The drainage layer includes a lower drainage layer, a lower geogrid, and an upper drainage layer. The lower drainage layer is water-resistant and is stacked on the cushion layer. The lower geogrid is disposed on the lower drainage layer. The upper drainage layer is disposed on the lower geogrid. The upper drainage layer has a granular accumulation layer structure with a porosity of 15% to 20%. The lower geogrid consists of multiple first rubber strips arranged in parallel. Each first rubber strip has a group of drainage holes penetrating its thickness direction. Adjacent first rubber strips are spaced apart at multiple connection points in the length direction. Each first rubber strip is spaced apart at multiple structural strips in the length direction. The structural strips are embedded in the middle of the thickness direction of the first rubber strip and are arranged along the width direction of the first rubber strip.

[0009] An upper geogrid is set on the drainage layer, wherein the upper geogrid is composed of multiple second rubber strips arranged in parallel, and adjacent second rubber strips are spaced apart in the length direction to form multiple connection points;

[0010] The road surface layer is laid on the geogrid to form a bond, and the road surface layer is made of cement.

[0011] The road surface layer is superimposed on the road surface layer.

[0012] Furthermore, the first adhesive strip includes sub-films bonded together in the thickness direction, and adjacent first adhesive strips are connected by a U-shaped connector to form a connection point, with the two ends of the U-shaped connector extending into the middle of the two first adhesive strips in the thickness direction.

[0013] Furthermore, the adjacent first adhesive strips are welded or bonded together.

[0014] Furthermore, the structural strip is made of iron, and the width direction of the first adhesive strip covers the structural strip.

[0015] Furthermore, the lower drainage layer is a cement-bonded particle stacked layer structure.

[0016] Furthermore, the particles in the lower drainage layer are gravel and fine sand.

[0017] Furthermore, a waterproof geotextile layer is provided between the lower drainage layer and the upper drainage layer.

[0018] Furthermore, the road surface layer is made of asphalt.

[0019] Furthermore, the upper drainage layer is made of compacted crushed stone with a particle size of 3.0–30.0 mm.

[0020] Furthermore, the cushion layer is composed of fine sand and crushed stone with a particle size of 3.0 mm–10.0 mm, compacted together.

[0021] The roadbed anti-settlement structure provided by this utility model includes a water-resistant lower drainage layer stacked on a subbase, with a lower geogrid installed on top of the lower drainage layer. An upper drainage layer is laid within the lower geogrid. Structural strips are embedded in the middle of the thickness direction of the first rubber strip and are positioned along its width direction. These structural strips enhance the strength of the first rubber strip in its width direction, thereby strengthening the structural strength of each grid within the lower geogrid. This structurally reinforced lower geogrid ensures the overall strength of the upper drainage layer while increasing the toughness of each grid, thus reducing the likelihood of structural abnormalities in the upper drainage layer. The composite reinforcement of the upper geogrid enhances the structural strength of the pavement layer, improves water resistance and drainage performance, and simultaneously increases the structural stability of the upper drainage layer, reducing the possibility of settlement. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the roadbed anti-settlement structure of the first embodiment of this utility model;

[0023] Figure 2 is a schematic diagram of the lower geogrid in the roadbed anti-settlement structure of the first embodiment of this utility model;

[0024] Figure 3 is a schematic cross-sectional view of the first rubber strip in the roadbed anti-settlement structure of the first embodiment of this utility model;

[0025] Figure 4 is a diagram showing the arrangement of the U-shaped connector in the roadbed anti-settlement structure according to the second embodiment of this utility model;

[0026] Figure 5 is a schematic diagram of the roadbed anti-settlement structure of the third embodiment of this utility model. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0029] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0030] Referring to Figures 1 to 5, in one embodiment of this utility model, a roadbed anti-settlement structure includes:

[0031] The roadbed is 100mm wide, serving as the structural foundation.

[0032] A subbase 200 is stacked on the roadbed 100, wherein the subbase 200 has a granular stacked layer structure and a porosity of 4% to 7%;

[0033] The drainage layer includes a lower drainage layer 310, a lower geogrid 320, and an upper drainage layer 330. The lower drainage layer 310 is water-resistant and is stacked on the cushion layer 200. The lower geogrid 320 is disposed on the lower drainage layer 310. The upper drainage layer 330 is disposed on the lower geogrid 320. The upper drainage layer 330 has a granular accumulation layer structure with a porosity of 15% to 20%. The lower geogrid 320 is composed of a plurality of first adhesive strips 321 arranged in parallel. The first adhesive strips 321 have drainage holes penetrating in the thickness direction. Adjacent first adhesive strips 321 are spaced apart in the length direction with a plurality of connection points. The first adhesive strips 321 are spaced apart in the length direction with a plurality of structural strips 322. The structural strips 322 are embedded in the middle of the thickness direction of the first adhesive strips 321 and are arranged along the width direction of the first adhesive strips 321.

[0034] An upper geogrid 400 is disposed on the drainage layer, wherein the upper geogrid 400 is composed of a plurality of second rubber strips arranged in parallel, and adjacent second rubber strips are spaced apart in the length direction to form a plurality of connection points;

[0035] The road surface layer 500 is laid on the upper geogrid 400 to form a bond, and the road surface layer 500 is made of cement.

[0036] The road surface layer 600 is stacked on the road surface layer 500.

[0037] In the existing technologies, various anti-settlement processes still have the problem of being relatively complex and having room for improvement in effectiveness.

[0038] The roadbed anti-settlement structure provided by this utility model includes:

[0039] Roadbed 100 serves as the structural foundation. The material of Roadbed 100 can be a compacted foundation surface at the construction site, such as soil.

[0040] Subbase layer 200 is laid on top of subgrade 100. Subbase layer 200 has a granular compacted structure with a porosity of 4% to 7%. Subbase layer 200 has a relatively dense structure and can be composed of fine sand and crushed stone with a particle size of 3.0mm–10.0mm, compacted together. For example, using fine sand and crushed stone with a particle size in the range of 3.0–10.0mm ensures sufficient porosity for performance requirements, providing both high structural strength and drainage. The gradation of the fine sand and crushed stone is selected based on actual conditions. Subbase layer 200 provides structural support while also achieving a certain degree of moisture removal.

[0041] The drainage layer comprises a lower drainage layer 310, a lower geogrid 320, and an upper drainage layer 330. The lower drainage layer 310 is water-resistant and is stacked on top of the foundation layer 200. The lower drainage layer 310 is a cement-bonded granular accumulation layer structure, where the granules form the main structural unit, and the cement binds the granules together to achieve the water-resistant effect. The granules in the lower drainage layer 310 can be fine sand and crushed stone, and the gradation of the fine sand and crushed stone is selected according to the actual situation.

[0042] A lower geogrid 320 is installed on the lower drainage layer 310. An upper drainage layer 330 is laid on top of the lower geogrid 320. The upper drainage layer 330 has a granular accumulation structure with a porosity of 15% to 20%. The lower geogrid 320 consists of multiple first adhesive strips 321 arranged in parallel. Drainage holes penetrate the thickness of each first adhesive strip 321. These drainage holes ensure effective drainage. Adjacent first adhesive strips 321 are spaced apart along their length, forming multiple connection points. The connection method for the first adhesive strips 321 can be welding or bonding. Multiple structural strips 322 are spaced apart along the length of each first adhesive strip 321. The structural strips 322 are embedded in the middle of the thickness of the first adhesive strip 321 and are arranged along the width of the first adhesive strip 321. The structural strips 322 enhance the strength of the first adhesive strips 321 in the width direction, thereby strengthening the structural strength of each grid in the lower geogrid 320. The structural strips 322 can be made of iron wire or steel wire, etc. By strengthening the lower geogrid 320, the overall strength of the upper drainage layer 330 is guaranteed, while the toughness of each grid in the lower geogrid 320 is improved, thus reducing the possibility of structural abnormalities in the upper drainage layer 330.

[0043] The upper geogrid 400 is installed on the drainage layer. The upper geogrid 400 consists of multiple second adhesive strips installed in parallel. Adjacent second adhesive strips are spaced apart along their length to form multiple connection points. The second adhesive strips can be connected by welding or bonding.

[0044] The pavement layer 500 is laid on top of the geogrid 400 to form a bond. The pavement layer 500 is made of cement. It forms the main structural support. Reinforcement is achieved through the composite geogrid 400, thus increasing the structural strength of the pavement layer 500. The pavement layer 500 is made of cement and incorporates appropriately sized reinforcing bars to provide structural strength. The thickness of the pavement layer 500 is determined according to actual construction standards. The cement-based pavement layer 500 offers advantages such as simple construction and superior performance.

[0045] The surface layer 600 is superimposed on the pavement layer 500. The surface layer 600 can be an asphalt or cement layer, etc., depending on the usage conditions.

[0046] In summary, the lower drainage layer 310 is water-resistant and is stacked on the subbase 200, with a lower geogrid 320 installed on top of it. The upper drainage layer 330 is laid on top of the lower geogrid 320. Structural strips 322 are embedded in the middle of the thickness direction of the first adhesive strip 321 and are positioned along its width. The structural strips 322 enhance the strength of the first adhesive strip 321 in its width direction, thereby strengthening the structural strength of each grid in the lower geogrid 320. This structurally reinforced lower geogrid 320 ensures the overall strength of the upper drainage layer 330 while increasing the toughness of each grid, thus reducing the likelihood of structural abnormalities in the upper drainage layer 330. The composite reinforcement with the upper geogrid 400 further enhances the structural strength of the pavement layer 500. This improves water resistance and drainage performance, while also increasing the structural stability of the upper drainage layer 330 and reducing the possibility of settlement.

[0047] Referring to FIG4, in one embodiment, the first adhesive strip 321 includes sub-adhesive sheets 323 bonded together in the thickness direction, and adjacent first adhesive strips 321 are connected by a U-shaped connector 324 to form a connection point, wherein the two ends of the U-shaped connector 324 extend into the middle of the two first adhesive strips 321 in the thickness direction.

[0048] In this embodiment, the two ends (two legs) of the U-shaped connector 324 are each clamped by a sub-film 323, and the clamping operation can be completed simultaneously during the forming process of the first adhesive strip 321. The introduction of the U-shaped connector 324 enables connection between adjacent first adhesive strips 321. The number of U-shaped connectors 324 depends on the specific dimensions.

[0049] In one embodiment, adjacent first adhesive strips 321 are welded or bonded together.

[0050] In this embodiment, adjacent first adhesive strips 321 are heat-melted at the bonding location to achieve connection, or the connection is achieved through external adhesive, which has the advantages of simplicity and convenience.

[0051] Referring to FIG3, in one embodiment, the structural strip 322 is made of iron, and the width direction of the first adhesive strip 321 covers the structural strip 322.

[0052] In this embodiment, the two ends of the structural strip 322 in the length direction are not exposed to the first adhesive strip 321, thereby reducing the possibility of corrosion of the structural strip 322 and providing a basis for the performance of the entire geogrid 320.

[0053] In one embodiment, the lower drainage layer 310 is a cement-bonded granular stacked layer structure.

[0054] In this embodiment, a lower drainage layer 310 is provided, which is formed by particles and bonded together with cement to achieve a water-blocking effect.

[0055] In one embodiment, the particles in the lower drainage layer 310 are gravel and fine sand.

[0056] In this embodiment, the particles in the lower drainage layer 310 are limited to fine sand and gravel, and the gradation of fine sand and gravel is selected according to the actual situation.

[0057] Referring to FIG5, in one embodiment, a waterproof geotextile layer 340 is provided between the lower drainage layer 310 and the upper drainage layer 330.

[0058] In this embodiment, the amount of water entering the lower drainage layer 310 is reduced by the waterproof geotextile layer 340, thereby reducing the waterproofing pressure on the lower drainage layer 310.

[0059] In one embodiment, the road surface layer 600 is made of asphalt.

[0060] In this embodiment, the surface layer 600 is limited to asphalt pavement, which provides superior pavement characteristics and good drainage. The specific asphalt formula and construction thickness of the surface layer 600 are selected based on actual conditions and are not the focus.

[0061] In one embodiment, the upper drainage layer 330 is formed by compacting crushed stone with a particle size of 3.0–30.0 mm.

[0062] In this embodiment, the structure and performance of the drainage layer are restricted. The crushed stone is made from natural raw materials or processed from natural raw materials / construction waste, which meets the requirements of structural strength and drainage effect.

[0063] In one embodiment, the cushion layer 200 is formed by compacting fine sand and crushed stone with a particle size of 3.0 mm–10.0 mm.

[0064] In this embodiment, the structure and performance of the subbase 200 are limited. It is made of fine sand and crushed stone with a particle size ranging from 3.0 to 10.0 mm, which is compacted to ensure that the porosity meets the performance requirements. Specifically, it provides both high structural strength and drainage. The gradation of the fine sand and crushed stone is selected according to the actual situation.

[0065] In summary, the roadbed anti-settlement structure provided by this utility model includes a lower drainage layer 310 with water-blocking properties, stacked on the subbase 200, and a lower geogrid 320 on the lower drainage layer 310. An upper drainage layer 330 is arranged on the lower geogrid 320. A structural strip 322 is embedded in the middle of the thickness direction of the first adhesive strip 321 and is arranged along the width direction of the first adhesive strip 321. The structural strip 322 strengthens the strength of the first adhesive strip 321 in the width direction, thereby strengthening the structural strength of each grid in the lower geogrid 320. Through the structurally strengthened lower geogrid 320, the overall strength of the upper drainage layer 330 is guaranteed, while the toughness of each grid in the lower geogrid 320 is improved, thus reducing the possibility of structural abnormalities in the upper drainage layer 330. The composite reinforcement of the upper geogrid 400 enhances the structural strength of the pavement layer 500. Water-blocking and drainage performance are improved, and the structural stability of the upper drainage layer 330 is enhanced, reducing the possibility of settlement.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A roadbed anti-settlement structure, characterized in that, include: The roadbed (100) serves as the structural foundation; the cushion layer (200) is stacked on the roadbed (100), and the cushion layer (200) has a granular packing structure with a porosity of 4% to 7%; the drainage layer includes a lower drainage layer (310), a lower geogrid (320), and an upper drainage layer (330). The lower drainage layer (310) is water-resistant and stacked on the cushion layer (200). The lower geogrid (320) is set on the lower drainage layer (310), and the upper drainage layer (330) is arranged on the lower geogrid (320). The upper drainage layer (330) has a granular packing structure with a porosity of 15% to 20%. The lower geogrid (320) is composed of multiple first adhesive strips (321) arranged in parallel, and the thickness of the first adhesive strips (321) is square. A drainage hole group is formed through the drainage layer. Multiple connection points are formed between adjacent first rubber strips (321) in the length direction. Multiple structural strips (322) are set between the first rubber strips (321) in the length direction. The structural strips (322) are embedded in the middle of the thickness direction of the first rubber strips (321) and set along the width direction of the first rubber strips (321). An upper geogrid (400) is set on the drainage layer. The upper geogrid (400) is made of multiple second rubber strips arranged in parallel. Multiple connection points are formed between adjacent second rubber strips in the length direction. A road surface layer (500) is laid on the upper geogrid (400) to form a bond. The road surface layer (500) is made of cement. A road surface layer (600) is stacked on the road surface layer (500).

2. The roadbed anti-settlement structure according to claim 1, characterized in that, The first adhesive strip (321) includes sub-films (323) bonded together in the thickness direction. Adjacent first adhesive strips (321) are connected by a U-shaped connector (324) to form a connection point. The two ends of the U-shaped connector (324) extend into the middle of the thickness direction of the two first adhesive strips (321).

3. The roadbed anti-settlement structure according to claim 1, characterized in that, The adjacent first adhesive strips (321) are welded or bonded together.

4. The roadbed anti-settlement structure according to any one of claims 1 to 3, characterized in that, The structural strip (322) is made of iron, and the width direction of the first adhesive strip (321) covers the structural strip (322).

5. The roadbed anti-settlement structure according to any one of claims 1 to 3, characterized in that, The lower drainage layer (310) is a cement-bonded particle stacked layer structure.

6. The roadbed anti-settlement structure according to any one of claims 1 to 3, characterized in that, A waterproof geotextile layer (340) is provided between the lower drainage layer (310) and the upper drainage layer (330).

7. The roadbed anti-settlement structure according to any one of claims 1 to 3, characterized in that, The road surface layer (600) is made of asphalt.

8. The roadbed anti-settlement structure according to any one of claims 1 to 3, characterized in that, The upper drainage layer (330) is made of compacted crushed stone with a particle size of 3.0–30.0 mm.

Images