Roadbed structure for treating high liquid limit soil by building solid waste

Abstract

The utility model discloses a roadbed structure for treating high liquid limit soil through building solid waste, and belongs to the technical field of highway construction. The roadbed structure comprises a building solid waste layer, a hard discrete material press-in layer and a high liquid limit soil layer which are sequentially arranged from top to bottom, the thickness of the hard discrete material press-in layer is not smaller than 3 cm, the particle size of a used hard discrete material is 2-4 cm, and the crushing value is not larger than 26%. The structure has the advantages that the hard material press-in layer is arranged between the building solid waste layer and the high-liquid-limit soil layer, particles of the press-in layer are pressed into the high-liquid-limit soil layer, the contact area of the particles and the soil layer is increased, the building solid waste layer is filled above the hard material press-in layer, and the solid waste layer is filled above the hard material press-in layer. The upper pressure is transmitted to the high-liquid-limit soil through the hard material press-in layer, so that the problem that the building solid waste particles are pressed into the high-liquid-limit soil layer by the upper pressure can be reduced or avoided, the deformation resistance of the building solid waste-high-liquid-limit soil roadbed is improved, and the service life of the pavement is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of highway construction, and particularly relates to a roadbed structure for treating high liquid limit soil with construction solid waste. BACKGROUND

[0002] In highway engineering, soil with a liquid limit exceeding 50% is high liquid limit soil. High liquid limit soil is a poor soil that is not suitable for direct embankment filling, and needs special treatment for embankment filling.

[0003] Compared with general soil, construction solid waste has better water stability and higher strength, and is an effective way to digest existing construction solid waste for embankment filling. However, the high permeability of the construction solid waste embankment structure layer can cause the high liquid limit soil to be always in a high humidity environment, and the strength will decrease. Under the action of the upper vehicle cyclic load, the construction solid waste solid particles are easy to be pressed into the roadbed soil, causing local subsidence of the roadbed surface, and further causing the problems of pavement structure layer void and early cracking.

[0004] Therefore, when filling the construction solid waste layer above the high liquid limit soil layer, the construction solid waste layer and the high liquid limit soil layer need to be properly treated. The existing technology often uses the edge wrapping method, that is, a layer of "good soil" with a thickness not less than 15 cm is filled above the high liquid limit soil layer to improve the roadbed strength and play a water-blocking role, so as to ensure the stability of the high liquid limit soil roadbed strength and small deformation. However, in the high liquid limit soil area, the "good soil" is less distributed, and the transportation distance is large, resulting in a high cost of using "good soil" to treat the construction solid waste-high liquid limit soil roadbed. UTILITY MODEL CONTENTS

[0005] The utility model embodiment aims to provide a roadbed structure for treating high liquid limit soil with construction solid waste, which sets a hard bulk material pressing layer between the construction solid waste layer and the high liquid limit soil layer, improves the ability of the high liquid limit soil layer to resist the pressing of the construction solid waste block, thereby improving the anti-deformation ability of the construction solid waste-high liquid limit soil layer roadbed, and further solving at least one technical problem involved in the background art.

[0006] In order to solve the above technical problems, the utility model is implemented as follows:

[0007] The utility model embodiment provides a roadbed structure for treating high liquid limit soil with construction solid waste, which comprises, from top to bottom, a construction solid waste layer, a hard bulk material pressing layer and a high liquid limit soil layer, wherein the thickness of the hard bulk material pressing layer is not less than 3 cm, the particle size of the hard bulk material used is 2-4 cm, and the crushing value is not more than 26%. Since the thickness is not less than 3 cm, the hard bulk material pressing layer can completely support the particles in the overlying construction solid waste layer, avoiding the particles of the construction solid waste layer directly pressing on the surface of the high liquid limit soil layer. In addition, limiting the crushing value and particle size of the hard material can ensure the pressing construction effect.

[0008] Optionally, the surface structure depth of the high liquid limit soil layer is not less than 6mm, so that the deformation resistance of the roadbed can be significantly improved.

[0009] Optionally, a layer of hard bulk material pressing layer is arranged between the high liquid limit soil layer and the building solid waste layer.

[0010] Optionally, the crushing value of the hard bulk material is not more than 20%.

[0011] Optionally, a pavement structure layer is further arranged on the building solid waste layer.

[0012] The embodiment of the utility model has the advantages of:

[0013] By arranging a layer of hard material pressing layer between the building solid waste layer and the high liquid limit soil layer, the particles of the pressing layer are pressed into the high liquid limit soil layer, the contact area of the particles and the soil layer is increased, the building solid waste layer is filled above the hard material pressing layer, and the upper pressure is transmitted to the high liquid limit soil through the hard material pressing layer, so that the problem that the building solid waste particles are pressed into the high liquid limit soil layer by the upper pressure can be reduced or avoided, and the deformation resistance of the building solid waste-high liquid limit soil roadbed is improved, and the service life of the pavement is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor, wherein:

[0015] Figure 1 The overall structure schematic diagram of the building solid waste treatment high liquid limit soil roadbed structure provided by the utility model is shown in the figure.

[0016] Figure 2 The loading times-vertical cumulative strain diagram of the high liquid limit soil test piece with different surface structure depths provided by the utility model is shown in the figure. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0018] The terms "first", "second", and the like in the description and claims of the utility model are used to distinguish like objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of such terms herein is merely for descriptive purposes and does not necessarily imply a serial or chronological order unless explicitly indicated to do so. The term "first", "second", and the like used in the description and claims of the utility model are used to distinguish like objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of such terms herein is merely for descriptive purposes and does not necessarily imply a serial or chronological order unless explicitly indicated to do so. The term "first", "second", and the like used in the description and claims of the utility model are used to distinguish like objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of such terms herein is merely for descriptive purposes and does not necessarily imply a serial or chronological order unless explicitly indicated to do so. The objects distinguished by "first", "second", etc. are usually a kind, and the number of objects is not limited, for example, the first object can be one or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and " / " generally indicates that the front and rear associated objects are in an "or" relationship.

[0019] Please refer to Figure 1 As shown in the utility model embodiment provides a kind of roadbed structure of building solid waste treatment high liquid limit soil, including building solid waste layer 1, hard bulk material pressure layer 2 and high liquid limit soil layer 3 that are sequentially arranged from top to bottom, further, it further includes the pavement structure layer 4 that is laid on the building solid waste layer 1.

[0020] The thickness of the hard bulk material pressure layer is not less than 3cm, the particle size of the hard bulk material used is 2-4cm, and the crushing value is not greater than 26%. Since the thickness is not less than 3cm, the hard bulk material pressure layer can fully support the particles in the overlying building solid waste layer, preventing the particles of the building solid waste layer from directly pressing on the surface of the high liquid limit soil layer. In addition, the hard bulk material used in the utility model is easy to obtain, has a small amount, is economical, is easy to construct, and limits the crushing value and particle size of the hard material, which can ensure the construction effect of pressure.

[0021] The surface structure depth of the high liquid limit soil layer is not less than 6mm, which can significantly improve the deformation resistance of the roadbed. Referring to Figure 2 As shown in the utility model embodiment, by loading 80,000 times on high liquid limit soil test pieces with surface structure depths of 2mm, 4mm and 6mm, it can be seen that the vertical cumulative strain of the high liquid limit soil test piece with a surface structure depth of 6mm is significantly smaller than that of other working conditions and shows a converging trend.

[0022] In a specific embodiment, a layer of the hard bulk material pressure layer 2 is arranged between the high liquid limit soil layer 3 and the building solid waste layer 1. Further, the crushing value of the hard bulk material used in the hard bulk material pressure layer 2 is not greater than 20%.

[0023] It is to be understood that the terminology "including", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion such that process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0024] Further, it is noted that the scope of the methods and systems of the embodiments of the present application are not limited by the order of execution or sequence of steps, or the specific steps described, unless specifically stated otherwise. For example, steps described in a particular order can be performed in a different order, or steps can be performed substantially simultaneously. Further, certain features of the described examples can be combined, added, or removed.

[0025] The embodiments of the present application described above are merely exemplary and are not intended to limit the present application to the described embodiments. The scope of the present application is defined by the appended claims and the equivalents thereof.

Claims

1. A subgrade structure of construction solid waste treated high liquid limit soil, characterized by, The building solid waste layer, the hard bulk material pressing layer and the high liquid limit soil layer are arranged from top to bottom, wherein the thickness of the hard bulk material pressing layer is not less than 3 cm, the particle size of the hard bulk material is 2-4 cm, and the crushing value is not more than 26%.

2. The construction solid waste treated high liquid limit soil embankment structure according to claim 1, wherein The surface structure depth of the high liquid limit soil layer is not less than 6 mm.

3. The embankment structure of construction solid waste treated high liquid limit soil according to claim 1 or 2, characterized in that, A hard bulk material pressing layer is arranged between the high liquid limit soil layer and the building solid waste layer.

4. The construction solid waste treated high liquid limit soil embankment structure according to claim 3, wherein The crushing value of the hard bulk material is not more than 20%.

5. The construction solid waste treated high liquid limit soil embankment structure according to claim 1, wherein A pavement structure layer is further arranged on the building solid waste layer.

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