A roadbed structure and airport runway for preventing and controlling pot cover effect

Abstract

The present invention discloses a roadbed structure and an airport runway for preventing and controlling pot cover effect, comprising a permeable layer, a waterproof layer, a drainage cushion layer and a pavement structure layer arranged in sequence from bottom to top, the soil surface area on the side of the pavement structure layer is backfilled with a clay layer, the drainage cushion layer extends to the bottom of the clay layer, a drainage seepage well arranged longitudinally and connected to the permeable layer is formed below the clay layer, a longitudinally arranged waterproof board is formed on the side of the drainage seepage well close to the pavement structure layer, the waterproof board longitudinally passes through the drainage cushion layer from the clay layer and extends to the waterproof layer, and a one-way drainage pipeline is arranged on the waterproof board, the inlet of the one-way drainage pipeline is connected to the drainage cushion layer, the drainage cushion layer is used to divert water below the pavement structure layer to the inlet of the one-way drainage pipeline, and the outlet of the one-way drainage pipeline is connected to the drainage seepage well. In actual application, the accumulated water between the pavement structure layer and the waterproof layer can be smoothly drained to the drainage seepage well; at the same time, water backflow to the pavement structure layer can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a road foundation structure and an airport runway for preventing and controlling a pot-lid effect. Background Art

[0002] The "pot lid effect" of airport pavement is defined as the phenomenon that the surface aquiclude hinders the evaporation effect of the soil surface, causing water to accumulate under the impermeable cover layer, resulting in a significant increase in the moisture content of the soil under the cover layer or even saturation. The latest theoretical research divides the "pot lid effect" into two categories: the first category is caused by the condensation of water vapor in unsaturated soil, and the second category is caused by gaseous water under freezing conditions. The first type of "pot lid effect" refers to the phenomenon of condensation and accumulation of water vapor under the cover layer, which often occurs in soil with shallow groundwater levels and strong capillaries, and the water is mainly replenished in the form of liquid water; the second type of "pot lid effect" is common in arid or semi-arid areas, where the evaporation is large and the groundwater level is deep, but there is still water accumulation under its cover layer. In addition, in some rainy areas, as the airport is used for a long time, water enters the base layer through the cracks in the pavement and accumulates under the runway. In airports, since the runway is a large-area cover layer, the accumulated water is difficult to discharge laterally. As moisture accumulates, it may cause serious engineering disasters such as reduced strength of the roadbed soil and muddying of the roadbed, posing a serious threat to the safety of aircraft takeoff and landing.

[0003] In summary, how to solve the problem that the road foundation is easily affected by the pot cover effect and thus causes engineering disasters has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a roadbed structure and an airport runway for preventing and controlling the pot-lid effect, so as to solve the problem that the roadbed is easily affected by the pot-lid effect and causes engineering disasters.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a roadbed structure for preventing and controlling the pot cover effect, comprising a permeable layer, a waterproof layer, a drainage cushion layer and a pavement structure layer arranged in sequence from bottom to top, the soil surface area on the side of the pavement structure layer is backfilled with a clay layer, the drainage cushion layer extends to the bottom of the clay layer, a drainage infiltration well arranged longitudinally and connected to the permeable layer is formed below the clay layer, a longitudinally arranged waterproof board is formed on the side of the drainage infiltration well close to the pavement structure layer, the waterproof board longitudinally passes through the drainage cushion layer from the clay layer and extends to the waterproof layer, and a one-way drainage pipeline is arranged on the waterproof board, the inlet of the one-way drainage pipeline is connected to the drainage cushion layer, the drainage cushion layer is used to divert water below the pavement structure layer to the inlet of the one-way drainage pipeline, and the outlet of the one-way drainage pipeline is connected to the drainage infiltration well.

[0006] Preferably, the drainage cushion layer is a gravel blind ditch structure, and the inlet of the one-way drainage pipeline is connected to the end of the gravel blind ditch structure.

[0007] Preferably, a first filter screen is provided at the inlet of the one-way drainage pipeline.

[0008] Preferably, a second filter screen is provided at the outlet of the one-way drainage pipeline.

[0009] Preferably, the one-way drainage pipeline includes a vertical drainage section located below the drainage cushion layer and in the drainage seepage well, a one-way valve structure is arranged inside the vertical drainage section, the one-way valve structure includes a float and a float stopper arranged in the pipe of the vertical drainage section, the float stopper is located above the float and the float can be abutted against the lower end surface of the float stopper under the action of buoyancy, when the float abuts against the float stopper, the vertical drainage pipe is blocked, and when the float is disengaged from the float stopper, the vertical drainage pipe is opened.

[0010] Preferably, a plurality of one-way valve structures are arranged inside the vertical drainage section.

[0011] Preferably, a one-way valve structure is provided inside the vertical drainage section.

[0012] Preferably, the drainage infiltration well is filled with gravel in a water-permeable manner.

[0013] Compared with the background technology introduction, the above-mentioned roadbed structure for preventing and controlling the pot-lid effect includes a permeable layer, a waterproof layer, a drainage cushion layer and a pavement structure layer arranged in sequence from bottom to top, the soil surface area on the side of the pavement structure layer is backfilled with a clay layer, the drainage cushion layer extends to the bottom of the clay layer, and a drainage infiltration well arranged longitudinally and connected to the permeable layer is formed below the clay layer. A longitudinally arranged waterproof board is formed on the side of the drainage infiltration well close to the pavement structure layer, the waterproof board longitudinally passes through the drainage cushion layer from the clay layer and extends to the waterproof layer, and a one-way drainage pipeline is arranged on the waterproof board, the inlet of the one-way drainage pipeline is connected to the drainage cushion layer, the drainage cushion layer is used to divert water below the pavement structure layer to the inlet of the one-way drainage pipeline, and the outlet of the one-way drainage pipeline is connected to the drainage infiltration well. In actual application of this roadbed structure, the accumulated water between the pavement structure layer and the waterproof layer can be drained to the inlet of the one-way drainage pipe through the drainage cushion layer. Since the outlet of the one-way drainage pipe is connected to the drainage seepage well, the accumulated water can be discharged into the drainage seepage well through the one-way drainage pipe. At the same time, since the one-way drainage pipe is a one-way drainage, when the rainfall in the rainy season is large or the groundwater level rises, the barrier effect of the waterproof board and the one-way drainage pipe can prevent surface water or groundwater from flowing back to the bottom of the pavement structure layer, thereby effectively avoiding the problem of engineering disasters caused by the roadbed being affected by the pot cover effect.

[0014] In addition, the present invention also provides an airport runway, including a roadbed structure, which is a roadbed structure for preventing and controlling the pot cover effect as described in any of the above schemes. Since the above roadbed structure has the above technical effects, the airport runway having the roadbed structure should also have the corresponding technical effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic cross-sectional structure diagram of a roadbed structure provided in an embodiment of the present invention.

[0016] Figure 1 middle,

[0017] Permeable layer 1, waterproof layer 2, drainage cushion layer 3, pavement structure layer 4, clay soil layer 5, drainage seepage well 6, waterproof plate 7, one-way drainage pipeline 8, first filter screen 9, second filter screen 10, one-way valve structure 11. DETAILED DESCRIPTION

[0018] The core of the present invention is to provide a roadbed structure and an airport runway for preventing and controlling the pot-lid effect, so as to solve the problem that the roadbed is easily affected by the pot-lid effect and causes engineering disasters.

[0019] In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, an embodiment of the present invention provides a roadbed structure for preventing and controlling the pot cover effect, comprising a permeable layer 1, a waterproof layer 2, a drainage cushion layer 3 and a pavement structure layer 4 arranged in sequence from bottom to top, the soil surface area on the side of the pavement structure layer 4 is backfilled with a clay layer 5, the drainage cushion layer 3 extends to the bottom of the clay layer 5, and a drainage infiltration well 6 arranged longitudinally and connected to the permeable layer 1 is formed below the clay layer 5, and a longitudinally arranged waterproof board 7 is formed on the side of the drainage infiltration well 6 close to the pavement structure layer 4 (that is, the area outside the pavement of the pavement structure layer), the waterproof board 7 longitudinally passes through the drainage cushion layer 3 from the clay layer 5 and extends to the waterproof layer 2, and a one-way drainage pipeline 8 is arranged on the waterproof board 7, the inlet of the one-way drainage pipeline 8 is connected to the drainage cushion layer 3, the drainage cushion layer 3 is used to divert water below the pavement structure layer 4 to the inlet of the one-way drainage pipeline 8, and the outlet of the one-way drainage pipeline 8 is connected to the drainage infiltration well 6.

[0021] In actual application of this roadbed structure, the accumulated water between the pavement structure layer and the waterproof layer can be drained to the inlet of the one-way drainage pipe through the drainage cushion layer. Since the outlet of the one-way drainage pipe is connected to the drainage seepage well, the accumulated water can be discharged into the drainage seepage well through the one-way drainage pipe. At the same time, since the one-way drainage pipe is a one-way drainage, when the rainfall in the rainy season is large or the groundwater level rises, the barrier effect of the waterproof board and the one-way drainage pipe can prevent surface water or groundwater from flowing back to the bottom of the pavement structure layer, thereby effectively avoiding the problem of engineering disasters caused by the roadbed being affected by the pot cover effect.

[0022] It should be noted here that the specific structure of the drainage cushion layer 3 can adopt a gravel blind ditch structure, and the inlet of the one-way drainage pipeline 8 is connected to the end of the gravel blind ditch structure. By setting a gravel blind ditch structure (such as a transverse blind ditch), the water accumulated in the roadbed can be discharged in time, and the accumulation of water under the pavement structure layer can be effectively avoided to affect the roadbed project. Of course, it can be understood that the use of gravel blind ditch is only a preferred example of the embodiment of the present invention. In actual application, other drainage cushion layer structures commonly used by technicians in this field can also be used, as long as a transverse drainage channel can be formed between the waterproof layer and the pavement structure layer, and no more specific limitations are made here.

[0023] In a further implementation scheme, in order to prevent the one-way drainage pipe from being blocked and affecting the drainage of the drainage cushion layer, a first filter screen 9 can be provided at the inlet of the one-way drainage pipe 8; similarly, a second filter screen 10 can also be provided at the outlet of the corresponding one-way drainage pipe 8.

[0024] In some specific implementation schemes, the one-way drainage pipeline 8 realizes a specific structural form of one-way drainage from the inlet to the outlet. The one-way drainage pipeline 8 can be designed to include a vertical drainage section located below the drainage cushion layer 3 and in the drainage seepage well 6. A one-way valve structure 11 is arranged inside the vertical drainage section. The one-way valve structure 11 includes a float and a float stopper arranged in the pipe of the vertical drainage section. The float stopper is located above the float and the float can be against the lower end face of the float stopper under the action of buoyancy. When the float and the float stopper are against each other, the vertical drainage pipe is blocked from flowing. When the float and the float stopper are separated, the vertical drainage pipe is opened. Through this one-way valve structure, when the water level of the drainage cushion layer is higher than the water level of the drainage seepage well, the water flows from the drainage cushion layer to the drainage seepage well, the float moves downward, the one-way drainage pipeline is opened, and drainage begins; when the water level of the drainage seepage well is higher than the drainage cushion layer, the water flows from the drainage seepage well to the drainage cushion layer. At this time, the float rises and the one-way drainage pipe is closed to prevent external water from entering the drainage cushion layer.

[0025] It should be noted that the vertical drainage section may be provided with one check valve structure 11 or multiple check valve structures 11. In actual application, the check valve structure 11 may be selected according to actual needs.

[0026] In some more specific embodiments, the drainage infiltration well 6 can be filled with water-permeable gravel to ensure the support of the drainage infiltration well structure to the clay layer backfilled in the top soil surface area. Of course, it can be understood that the method of filling with water-permeable gravel is only a preferred example of the embodiment of the present invention. In actual application, other filling methods or supporting methods can also be used as long as the drainage infiltration well can be connected with the permeable layer and the water flow can be ensured. No more specific description is given here.

[0027] In addition, the present invention also provides an airport runway, including a roadbed structure, which is a roadbed structure for preventing and controlling the pot cover effect as described in any of the above schemes. Since the above roadbed structure has the above technical effects, the airport runway having the roadbed structure should also have the corresponding technical effects, which will not be described in detail here.

[0028] The above is a detailed introduction to the roadbed structure and airport runway for preventing and controlling the pot cover effect provided by the present invention. It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0029] It should also be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such articles or devices. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0030] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A road foundation structure for preventing and controlling pot cover effect, characterized in that: The invention comprises a permeable layer (1), a waterproof layer (2), a drainage cushion layer (3) and a pavement structure layer (4) arranged in sequence from bottom to top, the soil surface area on the side of the pavement structure layer (4) is backfilled with a clay layer (5), the drainage cushion layer (3) extends to the bottom of the clay layer (5), a drainage infiltration well (6) arranged longitudinally and communicating with the permeable layer (1) is formed below the clay layer (5), and a waterproof layer (2) arranged longitudinally is formed on the side of the drainage infiltration well (6) close to the pavement structure layer (4). The waterproof plate (7) passes through the drainage cushion layer (3) longitudinally from the clay layer (5) and extends to the waterproof layer (2), and a one-way drainage pipeline (8) is arranged on the waterproof plate (7), the inlet of the one-way drainage pipeline (8) is connected to the drainage cushion layer (3), the drainage cushion layer (3) is used to drain water under the pavement structure layer (4) to the inlet of the one-way drainage pipeline (8), and the outlet of the one-way drainage pipeline (8) is connected to the drainage seepage well (6); The drainage cushion layer (3) is a gravel blind ditch structure, and the inlet of the one-way drainage pipeline (8) is connected to the end of the gravel blind ditch structure; the inlet of the one-way drainage pipeline (8) is provided with a first filter screen (9), and the outlet of the one-way drainage pipeline (8) is provided with a second filter screen (10); the one-way drainage pipeline (8) comprises a vertical drainage section located below the drainage cushion layer (3) and in the drainage seepage well (6); a one-way valve structure (11) is provided inside the vertical drainage section; the one-way valve structure (11) comprises a float and a float stopper arranged in the pipe of the vertical drainage section; the float stopper is located above the float and the float can abut against the lower end surface of the float stopper under the action of buoyancy; when the float abuts against the float stopper, the vertical drainage section is blocked from flowing; when the float is separated from the float stopper, the vertical drainage section is opened.

2. The road foundation structure for preventing and controlling the pot cover effect according to claim 1, characterized in that: A plurality of one-way valve structures (11) are arranged inside the vertical drainage section.

3. The road foundation structure for preventing and controlling the pot cover effect according to claim 1, characterized in that: A one-way valve structure (11) is arranged inside the vertical drainage section.

4. The road foundation structure for preventing and controlling the pot cover effect according to claim 1, characterized in that: The drainage infiltration well (6) is filled with crushed stones in a water-permeable manner.

5. An airport runway, comprising a roadbed structure, characterized in that: The road base structure is a road base structure for preventing and controlling the pot cover effect as described in any one of claims 1 to 4.

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