Roadbed structure capable of preventing roadbed from being softened

Abstract

The utility model provides a roadbed structure capable of preventing roadbed softening, which comprises a soil base layer, an anchoring structure is arranged in the soil base layer, and the anchoring structure is used for anchoring the soil base layer; a first gravel layer is laid on the soil base layer, a lime-soil cushion layer is laid on the first gravel layer, a drainage layer is laid on the lime-soil cushion layer, the drainage layer comprises two rows of concrete slopes arranged on the lime-soil cushion layer in a left-right spaced mode, and a waterproof layer is laid in the middle of the upper surface of the lime-soil cushion layer and located between the two rows of concrete slopes. The waterproof layer is lower than the concrete side slope, a second gravel layer is laid on the waterproof layer, and the second gravel layer is flush with the concrete side slope; according to the roadbed structure capable of preventing the roadbed from being softened, rainwater permeating into the roadbed can be drained, so that roadbed softening caused by the fact that the interior of the roadbed is in a humid state for a long time is avoided, meanwhile, the maintenance cost is low, the supporting performance of the whole structure is good, the influence of thermal expansion and cold contraction and humidity is small, and the drainage layer is not prone to being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of roadbed, in particular to a roadbed structure capable of preventing the roadbed from softening. Background Art

[0002] The roadbed is the foundation of a track or road surface, and is a geotechnical structure formed by excavation or filling. However, the roadbed in the prior art has poor drainage effect, and rainwater and domestic sewage easily penetrate downward, causing the roadbed to be in a wet state for a long time, thereby causing the roadbed to soften.

[0003] Among them, the announcement number CN214694938U discloses a roadbed structure capable of preventing roadbed softening, comprising a rammed earth layer, a crushed stone layer is provided on the top surface of the rammed earth layer, a waterproof layer is provided on the top surface of the crushed stone layer, a hydrophobic layer is provided on the top surface of the waterproof layer, a base surface is provided on the top surface of the hydrophobic layer, the hydrophobic layer comprises an upper surface layer and a lower surface layer, and a drainage groove is provided between the upper surface layer and the lower surface layer. This technical solution still has defects:

[0004] The hydrophobic layer in this technical solution is a curved plate installed on a casting seat by bolts for drainage, and the casting seat is made of concrete. The casting seat is subject to thermal expansion and contraction due to weather reasons. At the same time, the curved plate is connected to each casting seat by bolts. Due to the different humidity and temperature at the location of the casting seat, the degree of deformation due to thermal expansion and contraction is different, which causes the connection between the curved plate and the casting seat to be subjected to long-term stress, which easily leads to the curved plate breaking or falling off from the casting seat, thereby causing the hydrophobic layer to be easily damaged. At the same time, the curved plate needs to be replaced after it breaks, and the replacement of the curved plate requires overall excavation, and then the curved plate is connected to each casting seat, and the maintenance cost is relatively high. Utility Model Content

[0005] In order to solve the problems in the background technology that the hydrophobic layer is easily damaged and has a high maintenance cost, the utility model proposes a roadbed structure that can prevent the roadbed from softening.

[0006] The technical solution of the utility model is: comprising a soil base,

[0007] Soil base: An anchoring structure is provided inside the soil base to anchor the soil base;

[0008] A first crushed stone layer is laid on the soil base layer, a lime soil cushion layer is laid on the first crushed stone layer, a drainage layer is laid on the lime soil cushion layer, the drainage layer includes two rows of concrete slopes arranged on the lime soil cushion layer at intervals, a waterproof layer is laid in the middle of the upper surface of the lime soil cushion layer, the waterproof layer is located between the two rows of concrete slopes, the height of the waterproof layer is lower than the concrete slope, a second crushed stone layer is laid on the waterproof layer, and the second crushed stone layer is flush with the concrete slope; a drainage mechanism is arranged in the concrete slope, one end of the drainage mechanism is connected to the second crushed stone layer, and the other end of the drainage mechanism is connected to the outside of the road slope;

[0009] A slurry seal layer is laid on the drainage layer, and an asphalt layer is laid on the slurry seal layer.

[0010] Preferably, the anchoring structure comprises pile holes, which are evenly distributed on the soil base layer and each of which is provided with a concrete pile.

[0011] Preferably, the drainage mechanism includes a drainage groove, and a plurality of drainage grooves spaced apart from each other in front and back are provided at the lower ends of the sides of the two rows of concrete slopes close to the second gravel layer, and the drainage grooves extend in the left-right direction, one end of the drainage groove close to the second gravel layer is a water inlet, and one end of the drainage groove away from the second gravel layer is a drainage outlet, and the water inlets are both located above the waterproof layer.

[0012] Preferably, the height of the drain outlet is lower than the water inlet located in the same drain trough.

[0013] Preferably, the height difference between the water inlet and the waterproof layer should be less than cm.

[0014] Preferably, a filter screen is fixedly connected inside the water inlet.

[0015] Preferably, the waterproof layer includes a cushion layer and a geotextile, the geotextile is laid on the cushion layer, the cushion layer is laid in the middle of the upper surface of the lime soil cushion layer, and the cushion layer is located between two rows of concrete slopes.

[0016] Preferably, the top of the waterproof layer has a slope, and the left and right ends of the waterproof layer are lower than the middle of the cushion layer.

[0017] The advantages of the utility model are as follows: when rainwater enters the roadbed, rainwater can be discharged from the roadbed to avoid the roadbed being in a wet state for a long time, thereby preventing the roadbed from softening due to long-term moisture. During use, since the crushed stone layer and the cushion layer are less affected by thermal expansion and contraction, the overall support is good, and the drainage layer structure is not easily damaged. At the same time, when local maintenance is required, only local excavation is required, and the maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative work.

[0019] Figure 1 This is a schematic diagram of the main structure of Example 1;

[0020] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at A.

[0021] In the figure, 1 is soil base layer, 2 is concrete piles, 3 is the first gravel layer, 4 is gray soil cushion layer, 5 is concrete slope, 6 is drainage ditch, 7 is slurry seal layer, 8 is waterproof layer, 9 is the second gravel layer, 10 is filter screen, and 11 is asphalt layer. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1: This embodiment aims to provide a roadbed structure that can prevent roadbed softening.

[0024] according to Figure 1 to Figure 2 As shown, during the roadbed construction, the construction workers first clear the surface vegetation on the road surface, then level the road surface, then clear the surface soil, dig downward, and then use the excavated and leveled road surface as the soil base layer 1, and then use the pile driver to open pile holes in the soil base layer 1 at even intervals from the middle to the outside, and then pour cement soil into the pile holes after mixing it with a mixer, and then tamp it and wait for it to form a pile. After it forms a pile, it becomes a concrete pile 2, through which the soil base layer 1 is anchored.

[0025] After the concrete pile 2 is formed, the construction workers will lay the first crushed stone layer 3 on the soil base layer 1. The material of the first crushed stone layer 3 can be crushed pebbles and gravel, and then a layer of civil grid is sandwiched therein, and then compacted by a road roller. Then, a layer of gray soil cushion layer 4 is laid on the first crushed stone layer 3, and then compacted by a road roller. The first crushed stone layer 3 is used to fill the gaps between the pile tops of the concrete piles 2. The gaps between the pile tops of the concrete piles 2 are filled with crushed pebbles and gravel.

[0026] After the lime-soil cushion layer 4 is compacted, a drainage layer is laid. The drainage layer includes a concrete slope. Two rows of concrete slopes 5 are cast on both sides of the lime-soil cushion layer 4 through a civil engineering mold. The two rows of concrete slopes 5 are arranged on the lime-soil cushion layer 4 at intervals on the left and right. The positions of the two rows of concrete slopes 5 correspond to each other on the left and right. A waterproof layer 8 is laid on the middle end of the upper surface of the lime-soil cushion layer 4. The waterproof layer 8 is located between the two rows of concrete slopes 5. The waterproof layer includes a cushion layer and a geotextile. The cushion layer is laid in the middle of the upper surface of the lime-soil cushion layer 4. The cushion layer can be compacted with sand, slag, gravel, ash soil and other materials. The cushion layer should have a certain slope during construction, and the left and right ends of the cushion layer should be lower than the middle end of the cushion layer. Then a layer of geotextile is laid on the cushion layer. The geotextile can be made of needle-punched non-woven fabric or PE film composite geotextile. Since the cushion layer has a slope, the geotextile also has a certain slope after actual laying. Therefore, the top of the waterproof layer 8 has a certain slope, and the left and right ends of the waterproof layer 8 are lower than the middle of the waterproof layer 8.

[0027] A plurality of drainage grooves 6 are provided at the lower ends of the sides of the two rows of concrete slopes 5 close to the second gravel layer 9, and the drainage grooves 6 extend in the left-right direction. At the same time, one end of the drainage groove 6 close to the waterproof layer 8 is a water inlet, and the other end of the drainage groove 6 away from the waterproof layer 8 is a drainage port. The height of the drainage port is lower than the water inlet located in the same drainage groove 6. A filter screen 10 is fixedly connected to the inside of the water inlet. The water inlet is located above the waterproof layer 8, that is, above the left and right ends of the geotextile. The distance between the water inlet and the geotextile should be less than 3 cm to facilitate the discharge of rainwater through the drainage groove 6.

[0028] The construction workers then lay a second crushed stone layer 9 on top of the geotextile, and fill the space between the top of the geotextile and the two rows of concrete slopes 5 with crushed pebbles or gravel until the second crushed stone layer 9 is flush with the concrete slope 5, and then sandwich a layer of civil grid therebetween, and then compact it, so that rainwater is blocked by the geotextile when it enters the second crushed stone layer 9 and penetrates downward. Since the geotextile has a slope, the rainwater flows down to the left and right ends along the slope, and then flows into the drainage ditch 6. The inflowing water is filtered through the filter screen 10 to prevent the second crushed stone layer 9 from flowing into the drainage ditch 6 with the water, thereby preventing the crushed stones in the second crushed stone layer 9 from being reduced after long-term use. Since the drainage outlet of the drainage ditch 6 is low, At the water inlet, the drainage ditch 6 has an inclination, and the water in the drainage ditch 6 flows along the drainage ditch 6 and is finally discharged from the drain port. Since the damage of the drainage layer is mostly caused by the damage of the earth cloth or the settlement of the cushion layer after being partially compressed, only local excavation is needed when maintenance is needed, and only local repair of the earth cloth or cushion layer is required. No overall excavation is required, thereby reducing maintenance costs. In addition, there is a certain gap between the internal materials of the cushion layer and the second crushed stone layer 9. When the temperature and humidity change, the volume change caused by thermal expansion and contraction is small, and it is not easy to be damaged. At the same time, the overall support of the cushion layer and the second crushed stone layer 9 is also good. When in use, it can better bear the load brought by vehicles passing by.

[0029] After the second crushed stone layer 9 is compacted, the construction workers lay the slurry seal layer 7 on the concrete slope 5 and the second crushed stone layer 9. The construction workers use a mixer to mix emulsified asphalt, coarse and fine aggregates, water, fillers and additives according to the designed ratio, and then lay them on the concrete slope 5 and the second crushed stone layer 9, thereby completing the slurry seal layer 7. Then, an asphalt layer 11 is laid on the slurry seal layer 7, and finally compacted, thereby completing the overall construction of the roadbed.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A roadbed structure capable of preventing roadbed softening, characterized in that: It includes soil base (1), Soil base (1): an anchoring structure is provided inside the soil base (1), and the anchoring structure is used to anchor the soil base (1); A first crushed stone layer (3) is laid on the soil base layer (1), a lime soil cushion layer (4) is laid on the first crushed stone layer (3), a drainage layer is laid on the lime soil cushion layer (4), the drainage layer comprises two rows of concrete side slopes (5) arranged on the lime soil cushion layer (4) at intervals, a waterproof layer (8) is laid on the middle part of the upper surface of the lime soil cushion layer (4), the waterproof layer (8) is located between the two rows of concrete side slopes (5), the height of the waterproof layer (8) is lower than the concrete side slope (5), a second crushed stone layer (9) is laid on the waterproof layer (8), and the second crushed stone layer (9) and the concrete side slope (5) are flush; a drainage mechanism is arranged in the concrete side slope (5), one end of the drainage mechanism is connected to the second crushed stone layer (9), and the other end of the drainage mechanism is connected to the outside of the road side slope; A slurry seal layer (7) is laid on the drainage layer, and an asphalt layer (11) is laid on the slurry seal layer (7).

2. The roadbed structure capable of preventing roadbed softening according to claim 1, characterized in that: The anchoring structure comprises pile holes, which are evenly distributed on the soil base layer (1) and each of which is provided with a concrete pile (2).

3. The roadbed structure capable of preventing roadbed softening according to claim 1, characterized in that: The drainage mechanism comprises a drainage groove (6), wherein a plurality of drainage grooves (6) are arranged in a front-to-back spacing manner at the lower ends of the sides of the two rows of concrete side slopes (5) close to the second crushed stone layer (9), and the drainage grooves (6) extend in the left-right direction, and one end of the drainage groove (6) close to the second crushed stone layer (9) is a water inlet, and one end of the drainage groove (6) away from the second crushed stone layer (9) is a drainage outlet, and the water inlets are both located above the waterproof layer (8).

4. A roadbed structure capable of preventing roadbed softening according to claim 3, characterized in that: The height of the drainage port is lower than the water inlet port located in the same drainage groove (6).

5. The roadbed structure capable of preventing roadbed softening according to claim 3 is characterized in that: The height difference between the water inlet and the waterproof layer (8) should be less than 3 cm.

6. The roadbed structure capable of preventing roadbed softening according to claim 3, characterized in that: A filter screen (10) is fixedly connected inside the water inlet.

7. The roadbed structure capable of preventing roadbed softening according to claim 1, characterized in that: The waterproof layer (8) comprises a cushion layer and a geotextile. The geotextile is laid on the cushion layer. The cushion layer is laid in the middle of the upper surface of the lime soil cushion layer (4), and the cushion layer is located between two rows of concrete slopes (5).

8. The roadbed structure capable of preventing roadbed softening according to claim 7, characterized in that: The top of the waterproof layer (8) has a slope, and the left and right ends of the waterproof layer (8) are lower than the middle of the cushion layer.

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