Loess roadbed drainage structure

Abstract

The utility model relates to a loess roadbed drainage structure which comprises concrete foundation piles exposed out of a slope. The loess backfill soil layer is laid around the concrete foundation piles; the first gravel mattress layer is laid on the loess backfill soil layer; the reinforced body is arranged at the pile head position of the concrete foundation pile and is connected with the pile head of the concrete foundation pile into a whole; the second gravel mattress layer is laid on the first gravel mattress layer; the water pipelines are arranged on the left and right sides of the first gravel mattress layer and the second gravel mattress layer and are communicated with the drainage channel; the micro-plastic loess mixture cushion layer is laid on the second gravel mattress layer; the upper embankment is laid on the micro-plastic loess mixture cushion layer; the upper road bed is laid on the upper embankment; the micro-plastic loess mixture cushion layer has good hydrophobicity, infiltrated rainwater is blocked, discharged into the water pipeline and discharged into the drainage channel, and compared with a traditional cushion layer waterproof material, the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a loess roadbed drainage structure. Background Art

[0002] The structure of loess is a "point and edge contact support porous structure". The soil is loose, vertical joints are well developed, and it is very easy to seep water. Fine-grained materials in loess, such as clay, soluble salts, gypsum, carbonates, etc., consolidate into aggregates when dry, making loess have strong strength. After encountering water, the soil will quickly disperse and disintegrate as the minerals dissolve and disperse. The anti-erosion ability of loess is very weak. The porosity in loess can generally reach 45% to 50%, especially the large pores are particularly prominent. When the upper body is infiltrated by water, it is easy to collapse under the action of its own weight and upper pressure. Collapsible loess is a special rock and soil that has high strength and low compressibility in dry conditions. After encountering water, its strength drops sharply under a certain force or under the action of its own weight. This characteristic will bring different degrees of harm to structures, causing roadbeds and structures to settle, break, and tilt significantly, seriously affecting their safety and use. It is widely distributed in the Loess Plateau in Gansu, Ningxia, Shaanxi and Shanxi. Therefore, the study of a embankment cushion structure that can reduce or even avoid the collapse of loess is of great significance to the safe operation and service life of railways and highways in loess distribution areas.

[0003] In the existing embankment cushion structure, the paving materials are mostly sand, ceramsite, mortar, and concrete, which are expensive and have high transportation costs. Therefore, based on the concept of green building, we recycle the plastic film left over from agricultural production in the Loess Plateau for secondary use, crush it and mix it with loess to form a cushion layer with excellent hydrophobicity, which can effectively solve the common subsidence problem in the Loess Plateau and reuse resources. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a loess roadbed drainage structure with excellent hydrophobicity, which can change the pore structure of loess and make it difficult for water to penetrate, so that water can flow out along the constructed water channel after flowing out.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a loess roadbed drainage structure, including concrete foundation piles, wherein the concrete foundation piles leak out of the slope surface;

[0006] A loess backfill soil layer is spread around the concrete foundation piles;

[0007] A first gravel cushion layer is laid on the loess backfill soil layer;

[0008] A reinforcement body is arranged at the pile head position of the concrete foundation pile and connected to the pile head of the concrete foundation pile as a whole;

[0009] a second gravel mattress layer, laid on the first gravel mattress layer;

[0010] A water pipe is arranged on the left and right sides of the first gravel cushion layer and the second gravel cushion layer, and the water pipe is connected to the drainage channel;

[0011] A microplastic loess mixture cushion layer is laid on the second gravel cushion layer;

[0012] Upper embankment, laid on the microplastic loess mixture cushion;

[0013] The upper roadbed is laid on the upper embankment.

[0014] In one embodiment of the utility model, the microplastic loess mixture cushion layer is formed by mixing and stirring plastic fragments and loess.

[0015] In one embodiment of the utility model, the microplastic loess mixture cushion layer has a thickness of 20 cm to 30 cm.

[0016] In one embodiment of the utility model, a porous drainage channel is arranged under the microplastic loess mixture cushion layer, and the porous drainage channel includes a rigid polyethylene grid and a porous earth drainage board. The rigid polyethylene grid and the porous earth drainage board are used to guide the water repelled by the microplastic loess mixture cushion layer into the water pipes on both sides.

[0017] In one embodiment of the present invention, the concrete foundation piles protrude 1.2 meters to 1.5 meters from the slope surface.

[0018] In one embodiment of the present invention, the thickness of the loess backfill layer is 60 cm to 90 cm.

[0019] In one embodiment of the present invention, the thickness of the first gravel mattress layer is 60 cm, and the thickness of the second gravel mattress layer is 60 cm.

[0020] In one embodiment of the present invention, the upper embankment is composed of permeable gravel, and the thickness of the upper embankment is 70 cm.

[0021] In one embodiment of the utility model, the thickness of the upper roadbed is 30 cm.

[0022] By adopting the above technical solution, the technical effects of the utility model are:

[0023] 1) The microplastic loess mixture cushion of the utility model has good hydrophobicity, which can block the infiltrating rainwater and discharge it into the water pipe, and then discharge it into the drainage ditch through the water pipe;

[0024] 2) The material of the utility model is plastic film used in agricultural production. Compared with traditional cushion waterproof materials, it is cheap and can be sourced locally;

[0025] 3) The utility model has the idea of ​​green building, and the waste plastics from agricultural production are recycled and used in engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a front view of a loess roadbed in one embodiment of the utility model;

[0028] Figure 2 It is a partial structural schematic diagram of a loess roadbed in one embodiment of the utility model. DETAILED DESCRIPTION

[0029] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0031] See also Figure 1 and Figure 2A loess roadbed drainage structure includes a concrete foundation pile 10, the concrete foundation pile 10 leaking out of the slope; a loess backfill layer 20, filled and spread around the concrete foundation pile 10; a first gravel cushion layer 30, laid on the loess backfill layer 20; a reinforcement body 40, arranged at the pile head position of the concrete foundation pile 10 and connected to the pile head of the concrete foundation pile 10 as a whole; a second gravel cushion layer 50, laid on the first gravel cushion layer 30; a water pipe 60, arranged on the left and right sides of the first gravel cushion layer 30 and the second gravel cushion layer 50, the water pipe 60 is connected to the drainage channel 70; a microplastic loess mixture cushion layer 80, laid on the second gravel cushion layer 50; an upper embankment 90, laid on the microplastic loess mixture cushion layer 80; an upper roadbed 100, laid on the upper embankment 90.

[0032] In one embodiment, the concrete foundation piles 10 protrude 1.2 meters to 1.5 meters from the slope surface.

[0033] In one embodiment, the loess backfill layer 20 has a thickness of 60 cm to 90 cm.

[0034] In one embodiment, the thickness of the first gravel mattress layer 30 is 60 cm.

[0035] In one embodiment, the reinforced body 40 is made of geotextile or geomembrane. The reinforced body 40 has a membrane tension effect, which will transmit more force to the concrete foundation pile 10. The reinforced body 40 is provided with two layers to increase the bearing capacity of the concrete foundation pile 10 in the horizontal direction and reduce the lateral deformation of the concrete foundation pile 10.

[0036] In one embodiment, the thickness of the second gravel mattress layer 50 is 60 cm.

[0037] In one embodiment, a porous drainage channel is arranged under the microplastic loess mixture cushion layer 80, and the porous drainage channel includes a rigid polyethylene grid and a porous earth drainage board. The rigid polyethylene grid and the porous earth drainage board are used to guide the water repelled by the microplastic loess mixture cushion 80 into the water pipes 60 on both sides.

[0038] In one embodiment, the reinforced body 40 is laid between the first gravel cushion layer 30 and the second gravel cushion layer 50. When the water seeping out of the microplastic loess mixture cushion layer 80 stays on the reinforced body 40, the reinforced body 40 can prevent the water from further seeping down. The membrane on the reinforced body 40 can be used to discharge the water to the water pipes 60 on both sides, and then lead the water out of the drainage channel 70.

[0039] In one embodiment, the water conduits 60 are grooves on both sides of the roadbed, and the grooves are opened on the ramps on both sides of the roadbed.

[0040] In one embodiment, the upper embankment 90 is composed of permeable gravel, and the thickness of the upper embankment 90 is 70 cm.

[0041] In one embodiment, the thickness of the upper roadbed 100 is 30 cm.

[0042] In one embodiment, the microplastic-loess mixture cushion layer 80 is formed by mixing plastic fragments and loess, and the thickness of the microplastic-loess mixture cushion layer 80 is 20 cm to 30 cm.

[0043] In one embodiment, when plastic fragments are produced, recovered agricultural plastic films are recovered and crushed with a crusher and mixed with loess to form a microplastic loess mixture cushion layer 80, and the microplastic loess mixture cushion layer 80 is covered with the height of 20 to 30 cm, the volume proportion of microplastics is 6% or more, and the particle size of microplastic particles is between 5 and 20 μm. Although the crushed plastic film will gradually disintegrate to this particle size in the loess over time, it takes several months, so the plastic film is fully crushed before mixing to reduce the disintegration time.

[0044] In short, the microplastic loess mixture cushion layer 80 of the utility model has good hydrophobicity, which can block the infiltrating rainwater and discharge it into the water pipe 60, and then into the drainage ditch 70 through the water pipe 60; the plastic material in the plastic loess mixture cushion layer 80 is a plastic film used in agricultural production. Compared with traditional cushion waterproof materials, it is cheap and comes from local sources; and the reinforcement method has the creativity of green building, recycling waste plastics from agricultural production for engineering construction.

[0045] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the utility model, such as a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0046] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.

Claims

1. A loess roadbed drainage structure, characterized in that: It comprises a concrete foundation pile (10), wherein the concrete foundation pile (10) protrudes out of the slope surface; A loess backfill layer (20) is filled around the concrete foundation piles (10); A first gravel cushion layer (30) is laid on the loess backfill layer (20); A reinforcement body (40) is arranged at the pile head position of the concrete foundation pile (10) and is integrally connected to the pile head of the concrete foundation pile (10); a second gravel cushion layer (50) laid on the first gravel cushion layer (30); A water pipe (60) is arranged on the left and right sides of the first gravel cushion layer (30) and the second gravel cushion layer (50), and the water pipe (60) is connected to the drainage channel (70); A microplastic loess mixture cushion layer (80) is laid on the second gravel cushion layer (50); An upper embankment (90) is laid on the microplastic loess mixture cushion layer (80); The upper roadbed (100) is laid on the upper embankment (90).

2. The loess roadbed drainage structure according to claim 1, characterized in that: The microplastic loess mixture cushion layer (80) has a thickness of 20 cm to 30 cm.

3. The loess roadbed drainage structure according to claim 1, characterized in that: A porous drainage channel is arranged below the microplastic loess mixture cushion layer (80), and the porous drainage channel comprises a rigid polyethylene grid and a porous earth drainage board. The rigid polyethylene grid and the porous earth drainage board are used to guide the water repelled by the microplastic loess mixture cushion layer (80) into the water pipes (60) on both sides.

4. The loess roadbed drainage structure according to claim 1, characterized in that: The concrete foundation piles (10) protrude 1.2 to 1.5 meters from the slope surface.

5. The loess roadbed drainage structure according to claim 1, characterized in that: The loess backfill soil layer (20) has a thickness of 60 cm to 90 cm.

6. The loess roadbed drainage structure according to claim 1, characterized in that: The thickness of the first gravel cushion layer (30) is 60 cm, and the thickness of the second gravel cushion layer (50) is 60 cm.

7. The loess roadbed drainage structure according to claim 1, characterized in that: The upper embankment (90) is composed of permeable gravel and has a thickness of 70 cm.

8. The loess roadbed drainage structure according to claim 1, characterized in that: The thickness of the upper roadbed (100) is 30 cm.

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