Mudstone and lime-doped fill roadbed structure

Abstract

The utility model discloses a mudstone doped lime fill roadbed structure, which belongs to the technical field of pavement engineering and comprises a roadbed base layer, a roadbed structure laid on the roadbed base layer, a pavement structure layer arranged on the roadbed structure and protection slopes arranged on two sides of the roadbed structure. The roadbed structure comprises a waterproof cushion layer, a drainage layer, a mudstone and lime mixed embankment layer, a geotechnical cloth layer and a fiber soil layer which are sequentially laid from bottom to top. The drainage supporting structure is of a transversely and longitudinally staggered concrete pouring structure or steel structure and is distributed in an H shape, the mudstone and lime mixed embankment layer comprises a soil fixing structure, and the soil fixing structure is arranged in a regular hexagon shape and is distributed in a honeycomb shape. By adopting the mudstone and lime-doped fill roadbed structure, the defects that mudstone is easy to expand and soften are overcome, and a stable structure is provided for the mudstone and lime-doped fill roadbed.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, and in particular to a mudstone-lime-lime fill roadbed structure. Background Technology

[0002] Mudstone is a material intermediate between hard rock and soil, with its main mineral components being kaolinite, illite, montmorillonite, and sericite. It is characterized by low compressive strength, easy weathering, and tendency to soften, disintegrate, and expand upon contact with water. Furthermore, its compaction density is highly sensitive to water content. In highway construction, mudstone, as a relatively soft and water-stable natural road-building material, can easily cause numerous engineering geological problems when directly used as filler in roadbeds. These problems include uneven settlement, softening, and mudification of the roadbed, which are extremely detrimental to highway construction, affecting construction quality and increasing project costs.

[0003] Quicklime (usually referring to lime) is a commonly used roadbed improvement material. It reacts chemically with the mineral components in mudstone to form a cementing substance, thereby improving the strength and stability of the mudstone. Simultaneously, the addition of quicklime can improve the particle size distribution and uniformity of the mudstone, reducing the proportion of oversized particles and improving compaction quality. Furthermore, quicklime has water-absorbing properties, which can reduce the water content of the mudstone, minimizing swelling and softening problems caused by moisture.

[0004] Therefore, adding quicklime to mudstone can effectively solve many problems caused by the poor water stability of mudstone as a roadbed structure. However, this structure still needs to be reinforced to make the road surface engineering quality more stable. Utility Model Content

[0005] The purpose of this invention is to provide a mudstone-lime-lime fill roadbed structure to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides a mudstone-lime-lime fill roadbed structure, including a roadbed base course, a roadbed structure laid on the roadbed base course, a pavement structure layer set on the roadbed structure, and slope protection set on both sides of the roadbed structure.

[0007] Preferably, a drainage ditch is provided on the subgrade base layer, and the drainage ditch is located near the edge of the slope protection.

[0008] Preferably, the slope protection is graded crushed gravel slope protection or solid brick slope protection.

[0009] Preferably, the roadbed structure includes, from bottom to top, a waterproof cushion layer, a drainage layer, a mudstone-lime embankment layer, a geotextile layer, and a fiber soil layer.

[0010] Preferably, the water-proof cushion layer is one of HDPE water-proof film cushion layer or rubber sand mixed cushion layer, and the geotextile layer is internally provided with a reinforcing structure.

[0011] Preferably, the drainage layer comprises a drainage support structure and gravel scattered in the drainage support structure, and the drainage layer is provided with a pipeline extending to the outside.

[0012] Preferably, the drainage support structure is a transversely and longitudinally staggered concrete pouring structure or a steel structure, which is distributed in an H shape, and the holes in the middle of the drainage support structure are communication structures.

[0013] Preferably, the mudstone mixed with lime embankment layer comprises a soil-fixing structure, the soil-fixing structure is arranged in a regular hexagon, the soil-fixing structure is distributed in a honeycomb shape, and the soil-fixing structure is internally filled with mudstone mixed with lime.

[0014] Therefore, the mudstone mixed with lime filling embankment structure has the following beneficial effects:

[0015] (1) The drainage layer has sufficient strength and stability to resist water flow scouring and roadbed deformation through the H-shaped drainage support structure.

[0016] (2) The soil-fixing structure in a regular hexagon is easy to process and install, provides uniform support force, reduces the disadvantages of easy swelling and softening of mudstone by using the improvement effect of lime, and forms a composite material with excellent mechanical properties and durability through reasonable proportioning and mixing, which is easy to process and transport, and reduces construction difficulty and cost.

[0017] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Fig. 1 is a structural schematic view of the mudstone mixed with lime filling embankment structure of the utility model;

[0019] Fig. 2 Fig. 3 is a soil-fixing structure schematic view of the mudstone mixed with lime filling embankment structure of the utility model;

[0020] Fig. 3 Fig. 4 is a drainage support structure schematic view of the mudstone mixed with lime filling embankment structure of the utility model;

[0021] LABEL DESCRIPTION

[0022] 1, subgrade base layer; 2, drainage ditch; 3, pavement structure layer; 4, revetment; 5, fiber soil layer; 6, geotextile layer; 7, mudstone mixed with lime embankment layer; 8, drainage layer; 9, water-resisting cushion; 10, soil consolidation structure; 11, drainage support structure; 12, connecting structure. DETAILED DESCRIPTION

[0023] The technical scheme of the present application is further described below with reference to the drawings and examples.

[0024] Unless otherwise defined, technical terms or scientific terms used in the present application shall be understood as the common meaning understood by a person with ordinary skills in the field to which the present application belongs. The terms "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0025] The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, and the mechanical parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection mode in the prior art, which will not be described in detail here. The component models appearing in this paper are common models in the prior art, which can be replaced according to actual needs.

[0026] As shown in the accompanying drawings Figs. 1-3 The present application discloses a kind of mudstone mixed with lime fill roadbed structure, including subgrade base layer 1, subgrade structure being laid on the subgrade base layer 1, pavement structure layer 3 being arranged on subgrade structure and revetment 4 being arranged on both sides of subgrade structure.

[0027] Drainage ditch 2 is arranged on subgrade base layer 1, and drainage ditch 2 is close to the edge of revetment 4, to introduce the water flow on the road into the surrounding water body, to prevent the scouring and erosion of water flow to subgrade and revetment 4, to ensure the stability and durability of subgrade. Revetment 4 is graded gravel revetment 4 or solid revetment 4 brick revetment 4, to increase the stability of overall structure.

[0028] Subgrade structure includes water-resisting cushion 9, drainage layer 8, mudstone mixed with lime embankment layer 7, geotextile layer 6 and fiber soil layer 5 being laid from bottom to top in sequence.

[0029] The waterproof cushion layer 9 is either an HDPE waterproof membrane cushion layer or a rubber sand mixed cushion layer. It prevents water from penetrating into the roadbed, effectively isolates groundwater, and prevents the roadbed from being damaged by water erosion. The geotextile layer 6 has a steel reinforcement structure inside to prevent the mixing and loss of roadbed materials, improve the stability and bearing capacity of the roadbed, and help the drainage of the roadbed structure.

[0030] The drainage layer 8 includes a drainage support structure 11, which is a crisscrossing concrete or steel structure in an H-shape. It possesses sufficient strength and stability to resist water erosion and roadbed deformation. The holes in the center of the drainage support structure 11 form a connecting structure 12, with gravel and sand spread between them to create a permeable layer. This allows water to flow through while providing some filtration to prevent external soil and impurities from entering the roadbed structure. The drainage layer 8 also has outward-extending pipes connecting to the outside, allowing accumulated water to drain into the drainage ditch 2.

[0031] The fiber soil layer 5 enhances the overall strength and wear resistance of the pavement, and improves the smoothness and service life of the pavement.

[0032] The mudstone-lime-lime embankment layer 7 includes a soil stabilization structure 10. The soil stabilization structure 10 is arranged in a regular hexagonal pattern with a honeycomb distribution, facilitating processing and installation, providing uniform support, reducing structural deformation, reducing material weight, facilitating drainage and ventilation, and lowering construction costs. The interior of the soil stabilization structure 10 is filled with mudstone mixed with lime. The lime's modifying effect reduces the mudstone's tendency to expand and soften. Through mixing, a composite material with excellent mechanical properties and durability can be formed, which is easy to process and transport, reducing construction difficulty and costs.

[0033] Therefore, the mudstone-lime-lime fill roadbed structure of this utility model adopts the above-mentioned structure, which solves the disadvantages of mudstone being easy to expand and soften, and provides a stable structure for mudstone-lime-lime fill roadbed.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A lime-mud fill embankment structure, characterized by: The application relates to a roadbed structure, which comprises a roadbed base layer, a roadbed structure layer laid on the roadbed base layer, a pavement structure layer arranged on the roadbed structure layer and slope protection arranged on both sides of the roadbed structure layer. The slope protection is graded gravel slope protection or solid slope protection brick slope protection. The roadbed structure comprises, from bottom to top, a water-proof cushion layer, a drainage layer, a mudstone and lime embankment layer, a geotextile layer and a fiber soil layer. The mudstone and lime embankment layer comprises a soil-fixing structure, the soil-fixing structure is arranged in a regular hexagon, the soil-fixing structure is distributed in a honeycomb shape, and the soil-fixing structure is filled with mudstone and lime.

2. A structure of clayey soil embankment mixed with lime according to claim 1, characterized in that: A drainage ditch is arranged on the roadbed base layer and is adjacent to the edge of the slope protection.

3. A lime-soil filled embankment structure according to claim 1, wherein: The water-proof cushion layer is one of an HDPE water-proof film cushion layer or a rubber sand mixed cushion layer, and a steel structure is arranged in the geotextile layer.

4. A lime-soil filled embankment structure according to claim 1, wherein: The drainage layer comprises a drainage support structure and gravel sand scattered in the drainage support structure, and the drainage layer is provided with a pipeline extending to the outside.

5. A lime-soil filled embankment structure according to claim 4, wherein: The drainage support structure is a transversely and longitudinally staggered concrete pouring structure or a steel structure and is distributed in an H shape, and the hole in the middle of the drainage support structure is a communication structure.

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