Mud rock filling high-fill road subgrade structure

Abstract

The utility model relates to a mudstone filling high-fill road subgrade structure which comprises a base, gravel blind ditches are arranged on the surface of the base in a subgrade filling area, and drainage side ditches extending in the length direction of the subgrade are arranged on the surface of the base on the two sides of the subgrade. The roadbed layer is filled on the base, a plurality of horizontally arranged impact rolling reinforcing layers and a plurality of horizontally arranged plastic grating layers are arranged in the roadbed layer, the impact rolling reinforcing layers and the plastic grating layers are respectively arranged at intervals along the vertical direction, the gravel blind ditch is buried in the roadbed layer, and the two drainage side ditches are respectively positioned on two sides of the roadbed layer. By arranging the impact rolling reinforcing layer and the plastic grating layer, the overall compactness of the roadbed is improved, the porosity of roadbed soil is reduced, the overall mechanical property of the roadbed layer is improved, differential settlement of the roadbed is reduced, and structural potential safety hazards such as roadbed slippage and instability are eliminated; the gravel blind ditches and the drainage side ditches guide and drain away seepage water and catchment water in the roadbed range in time, and the hidden danger of damage to the roadbed caused by water is eliminated.

Description

Technical Field

[0001] The utility model relates to the field of subgrade technology for road engineering, and particularly relates to a high-fill road subgrade structure filled with mudstone. Background Technique

[0002] With the continuous expansion of the urban scale, the land use space is becoming increasingly tense. For many mountainous cities, the urban development can only expand to the surrounding mountains. In the case of complex terrain and large height differences, deep excavation and high filling phenomena are inevitable in the construction of mountainous city roads. The design and implementation quality of the high-fill subgrade structure directly affect the safety, stability and service life of the road. Restricted by terrain, planning and other conditions, the amount of excavation and filling in mountain town roads is relatively large. A large amount of earthwork and stonework produced in the excavation section can be used for filling the subgrade in the filling section when meeting the requirements of subgrade filling materials, which can not only solve the problem of waste disposal, but also save project investment.

[0003] The subgrade with a fill slope height exceeding 20m is called a high-fill subgrade. Common diseases of high-fill subgrades include: overall settlement or local depression of the subgrade, overall sliding or slope collapse of the subgrade, longitudinal and transverse deformation of the subgrade reflected in pavement cracking, deformation and damage of underground pipelines, etc.

[0004] Among them, the problems of overall settlement or local depression of the subgrade, overall sliding or slope collapse of the subgrade are greatly affected by the overall compactness and porosity of the subgrade. How to reasonably design the subgrade structure to improve the overall compactness of the subgrade and reduce the soil porosity is an urgent problem to be solved at present. Content of the Utility Model

[0005] Based on the above description, the utility model provides a high-fill road subgrade structure filled with mudstone to improve the overall compactness of the subgrade and reduce the soil porosity, and solve the problems of overall settlement or local depression of the subgrade, overall sliding or slope collapse of the subgrade.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] The present application provides a high-fill road subgrade structure filled with mudstone, and the adopted technical solution is as follows:

[0008] A high-fill road subgrade structure filled with mudstone, comprising:

[0009] A base, a gravel blind ditch is provided on the surface of the base in the subgrade filling area, and drainage side ditches extending along the length direction of the subgrade are provided on both sides of the base surface.

[0010] The road base layer filled on the base, wherein multiple horizontally arranged impact rolling reinforcement layers and multiple horizontally arranged plastic grille layers are provided in the road base layer, the multiple impact rolling reinforcement layers and the multiple plastic grille layers are respectively arranged at intervals in the vertical direction, the gravel blind ditch is buried in the road base layer, and the two drainage side ditches are respectively located on both sides of the road base layer.

[0011] Preferably, the road base layer includes a mudstone rockfill layer, a gravel leveling layer, and a gravel soil layer filled in sequence from bottom to top.

[0012] Preferably, the multiple impact rolling reinforcement layers are distributed in the mudstone rockfill layer and the gravel soil layer.

[0013] Preferably, the road base layer further includes a roadbed strengthening layer provided at the top of the gravel soil layer, and the road surface structure is provided at the top of the roadbed strengthening layer.

[0014] Preferably, one plastic grille layer is provided at the top of the gravel leveling layer, one plastic grille layer is provided in the roadbed strengthening layer, and the remaining plastic grille layers are provided in the gravel leveling layer.

[0015] Preferably, the surface of the base is a slope surface and is provided in a stepped shape.

[0016] Preferably, the mudstone rockfill layer (21) is filled to a set height from the natural ground elevation.

[0017] Preferably, displacement side piles are respectively provided on both sides of the road base layer on the base.

[0018] Preferably, settlement observation pipes are provided at the position of the road center line and on both sides of the road in the road base layer, the lower ends of the settlement observation pipes extend to the base, and the upper ends extend to the top of the road base layer.

[0019] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects:

[0020] 1. In this application, multiple impact rolling reinforcement layers and multiple plastic grid layers are arranged in the road base layer. The impact rolling reinforcement layers are formed by impact rolling treatment with a roller. On the basis of the conventional vibration compaction of the road base layer, the setting of the impact rolling reinforcement layers improves the overall compactness of the roadbed and reduces the porosity of the roadbed soil. When the road base layer is filled in layers, a plastic grid layer is set at a certain filling height. The plastic grid layer connects the two layers of soil filled separately. The multiple plastic grid layers improve the integrity of the road base layer and effectively improve the overall mechanical properties of the roadbed, thereby reducing the uneven settlement of the roadbed and eliminating potential structural safety hazards such as roadbed slip and instability. The setting of the gravel blind ditch and drainage side ditch on the foundation can timely drain away the possible seepage water and converged water within the roadbed range, eliminate the disease hazards caused by water to the roadbed, and reduce the risk of diseases occurring in the high-fill roadbed.

[0021] 2. In this application, displacement side piles and settlement observation pipes are set as settlement observation facilities to continuously monitor the slope displacement and roadbed settlement data, providing a supporting basis for the controllability of roadbed settlement deformation and slope displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the high-fill roadbed structure filled with mudstone provided by the embodiment of the present utility model;

[0023] Figure 2 It is a structural schematic diagram of the gravel blind ditch in the high-fill roadbed structure filled with mudstone provided by the embodiment of the present utility model;

[0024] Figure 3 It is a schematic diagram of the impact rolling route during the construction of the impact rolling reinforcement layer in the construction method of the high-fill roadbed structure filled with mudstone provided by the embodiment of the present utility model.

[0025] DESCRIPTION OF THE REFERENCE NUMERALS:

[0026] 1. Foundation; 2. Road base layer; 21. Mudstone rockfill layer; 22. Gravel leveling layer; 23. Gravel soil layer; 24. Roadbed strengthening layer; 25. Impact rolling reinforcement layer; 26. Plastic grid layer; 3. Gravel blind ditch; 31. Anti-seepage geotextile; 32. Filter geotextile; 4. Drainage side ditch; 5. Displacement side pile; 6. Settlement observation pipe; 7. Pavement structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant drawings. Embodiments of this application are given in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0029] It will be understood that spatial relationship terms such as "under", "beneath", "below", "underneath", "above", "upper", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It should be understood that, in addition to the orientation shown in the drawings, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the drawings is flipped, an element or feature described as "under other elements" or "beneath them" or "under it" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. In addition, the device may also include additional orientations (such as, rotated 90 degrees or other orientations), and the spatial descriptors used herein are to be interpreted accordingly.

[0030] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is an electrical signal or data transfer between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0031] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / comprising" or "has / having" etc. specify the presence of the stated features, integers, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof.

[0032] Referring to Figures 1-3 As shown, an embankment roadbed structure filled with mudstone for high embankment roads provided by an embodiment of this application includes a base 1 and a roadbed layer 2 filled on the base 1. Among them, multiple horizontally arranged impact rolling reinforcement layers 25 and multiple horizontally arranged plastic grid layers 26 are provided in the roadbed layer 2, and the multiple impact rolling reinforcement layers 25 and the multiple plastic grid layers 26 are respectively arranged at intervals in the vertical direction.

[0033] By arranging multiple impact rolling reinforcement layers 25 and multiple plastic grille layers 26 in the roadbed layer 2, the impact rolling reinforcement layers 25 are formed by impact rolling treatment with a roller. On the basis of the conventional vibration compaction of the roadbed layer 2, the setting of the impact rolling reinforcement layers 25 improves the overall compactness of the roadbed and reduces the porosity of the roadbed soil mass. When the roadbed layer 2 is filled in layers, a plastic grille layer 26 is set at a certain filling height. The plastic grille layer 26 connects the two layers of soil filled separately. The multiple plastic grille layers 26 improve the integrity of the roadbed layer 2, effectively improve the overall mechanical properties of the roadbed, thereby reducing the uneven settlement of the roadbed and eliminating structural safety hazards such as roadbed slippage and instability.

[0034] Refer to Figure 1 As shown, specifically, the surface of the base 1 can be a plane or a slope. In this embodiment, the slope is used for illustration. Before filling the roadbed layer 2, the surface of the base 1 is excavated to form a stepped shape, and the width of the step is not less than the set value, and a reverse slope is set on the tread of the step. In this way, after filling the roadbed layer 2, the stress stability of the roadbed layer 2 can be improved, and the roadbed layer 2 can be prevented from slipping or collapsing. The surface of the base 1 is cleared of the surface layer, the steps are excavated and compacted and leveled before the construction of the roadbed layer 2, providing good foundation bearing conditions for the filling of the roadbed layer 2.

[0035] The impact rolling reinforcement layer 25 is formed by impact rolling treatment with a roller when the roadbed layer 2 is filled to the corresponding height; the plastic grille layer 26 is laid when the roadbed layer 2 is filled to the corresponding height and fixed in the roadbed layer 2 by U-shaped nails.

[0036] Refer to Figure 1 As shown, a crushed stone blind ditch 3 is provided on the surface of the base 1 in the roadbed filling area, and the crushed stone blind ditch 3 is buried in the roadbed layer 2; and, drainage side ditches 4 extending along the length direction of the roadbed are provided on both sides of the surface of the base 1, and the two drainage side ditches 4 are respectively located on both sides of the roadbed layer 2. Specifically, before filling the roadbed layer 2, the crushed stone blind ditch 3 is set on the surface of the base 1 according to the height, flow direction and catchment area of the valley, including a longitudinal blind ditch along the road length direction and a transverse blind ditch along the road width direction. The longitudinal blind ditch and the transverse blind ditch are connected to form an integral underground drainage channel, and the outlet of the crushed stone blind ditch 3 is introduced into the current ground drainage system nearby.

[0037] Refer to Figure 1 As shown, the drainage side ditch 4 is arranged at the toe position of the roadbed layer 2 and is a concrete drainage ditch, which collects the surface water of the slope of the roadbed layer 2 and the upstream rainwater and drains the water collected within the roadbed range. Through the setting of the crushed stone blind ditch 3 and the drainage side ditch 4, the possible seepage water and collected water within the roadbed range can be drained away in time, eliminating the disease hidden dangers caused by water to the roadbed and reducing the risk of diseases of the high embankment roadbed.

[0038] Refer to Figure 1As shown, the road base layer 2 includes a mudstone rockfill layer 21, a crushed stone leveling layer 22, and a crushed stone soil layer 23 filled from bottom to top in sequence. Multiple impact rolling reinforcement layers 25 are distributed in the mudstone rockfill layer 21 and the crushed stone soil layer 23. Specifically, the mudstone rockfill layer 21 at the bottom of the road base layer is filled with the surplus mudstone excavated from the project, and the mudstone rockfill layer 21 is filled to a set height from the natural ground elevation; the crushed stone leveling layer 22 and the crushed stone soil layer 23 are filled with crushed stone soil. The crushed stone leveling layer 22 levels the top of the mudstone rockfill layer 21 to ensure the coordinated deformation of the overall roadbed.

[0039] Refer to Figure 1 As shown, when filling the mudstone rockfill layer 21 and the crushed stone soil layer 23, a vibratory roller is used for compaction and leveling. And every time it is filled to the height of the impact rolling reinforcement layer 25, an impact rolling reinforcement layer 25 is formed through the impact rolling treatment by the roller. An impact rolling reinforcement layer 25 is set at every interval of a set height, and an impact rolling reinforcement layer 25 is respectively set at the top of the mudstone rockfill layer 21 and the top of the crushed stone soil layer 23 to improve the strength and stability at the junction of adjacent two layers of structures.

[0040] Refer to Figure 1 As shown, a plastic grid layer 26 is provided on the top of the crushed stone leveling layer 22. After the crushed stone leveling layer 22 is filled, a layer of plastic grid is laid on its top to form the plastic grid layer 26. The plastic grid can adopt a double-drawn plastic grid and is fixed by U-shaped nails.

[0041] Refer to Figure 1 As shown, the road base layer 2 further includes a roadbed strengthening layer 24 provided on the top of the crushed stone soil layer 23. The road surface structure 7 is provided on the top of the roadbed strengthening layer 24. A plastic grid layer 26 is provided in the roadbed strengthening layer 24, and the remaining plastic grid layer 26 is provided in the crushed stone soil layer 23. Specifically, when filling the crushed stone soil layer 23, a layer of plastic grid layer 26 is laid every time it is filled to the height of the plastic grid layer 26; when the roadbed strengthening layer 24 is filled to the design elevation, during filling, a plastic grid layer 26 is laid when it is filled to the height of the plastic grid layer 26, and the plastic grid layer 26 and the impact rolling reinforcement layer 25 need to be arranged at intervals. The road surface structure 7 is constructed on the top of the roadbed strengthening layer 24.

[0042] The various layers of the roadbed are filled in a refined stratified manner. Combining the settings of the impact rolling reinforcement layer 25 and the plastic grid layer 26 further improves the overall compactness of the roadbed, reduces the porosity of the roadbed soil mass, improves the overall mechanical properties of the road base layer, reduces the uneven settlement of the roadbed, and eliminates structural safety hazards such as roadbed slip and instability.

[0043] Refer to Figure 1As shown in the figure, further, displacement side piles 5 are respectively arranged on both sides of the roadbed layer 2 on the base 1. Among them, two displacement side piles 5 are arranged on one side of the roadbed layer 2, and the two displacement side piles 5 on one side of the roadbed layer 2 are arranged at intervals along the road width direction. Settlement observation pipes 6 are arranged at the position of the road center line and on both sides of the road in the roadbed layer 2. The lower end of the settlement observation pipe 6 extends to the base 1, and the upper end extends to the top of the roadbed layer 2. The settlement observation pipe 6 gradually extends upward to the top of the roadbed layer 2 as the roadbed layer 2 is filled. Multiple groups of displacement side piles 5 and settlement observation pipes 6 are arranged at intervals along the road length. By arranging the displacement side piles 5 and the settlement observation pipes 6 as the settlement observation facilities of the system, the deformation data of the subgrade during and after construction can be effectively monitored and early warning feedback can be provided, providing important data support for the subgrade filling stage. Through data analysis, the filling speed and construction process can be reasonably controlled; at the same time, the slope displacement and subgrade settlement data are continuously monitored, providing a support basis for the controllability of subgrade settlement deformation and slope displacement, and ensuring the quality and safety controllability of subgrade filling.

[0044] Referring to Figures 2-3 As shown in the figure, the construction method of the above-mentioned high-fill road subgrade structure filled with mudstone will be described in combination with specific embodiments, including the following steps:

[0045] S1. Surface treatment of the base 1: The existing ground line is cleared by 50 cm, and the foundation after clearing is leveled and compacted, and the compaction degree ≥ 92%; for the existing ground with a cross slope of 1:5 - 1:1.25, steps are excavated, the width of the steps is not less than 2 m, and a reverse slope of 2% should be set.

[0046] S2. Installing settlement observation facilities: Two displacement side piles 5 are arranged at each of the fill slopes at the two sides of the road, with a spacing of 2 m; one settlement observation pipe 6 is arranged at the vertical projection position on the base 1 on both sides of the road center line and the road side line. The settlement observation pipe 6 gradually extends upward to the top of the roadbed layer 2 as the roadbed layer 2 is filled. Along the road length direction, the spacing of each group of settlement observation facilities is 150 m.

[0047] S3. Construction of the roadbed drainage structure: Before the filling of the roadbed layer 2, according to the valley height, flow direction and catchment area, a crushed stone blind ditch 3 structure is set in the area of the roadbed layer 2 on the base 1. After the excavation of the blind ditch foundation is completed, an anti-seepage geotextile 31 is laid at the bottom, using two-layer geotextile and one-layer film, with a specification of 200g / 0.5mm / 200g, a direct seepage coefficient ≤ 0.01 cm / s, a puncture strength ≥ 2.75 KN / m, and a longitudinal and transverse lap length ≥ 30 cm; an anti-filter geotextile 32 is laid on both sides and the top surface of the blind ditch, with a specification of 300g / m²; the blind ditch is filled with crushed stones inside, and the coefficient of uniformity Cu of the crushed stone material in the blind ditch is controlled between 1 and 2, and the particle size is controlled between 5 and 10 cm; the water inlet of the blind ditch is wrapped entirely with the anti-filter geotextile 32, and the longitudinal and transverse blind ditches are connected upstream and downstream to form an integral underground drainage channel, and the outlet of the blind ditch is introduced into the existing ground drainage system nearby. A concrete drainage side ditch 4 is set along the toe of the fill slope to collect the water flowing down the slope and the upstream rainwater, and drain the water collected within the roadbed range.

[0048] S4. Construction of the mudstone rockfill layer 21: Before filling, the quality specifications of the mudstone are screened and processed. The filler particle size ≤ 500 mm and should preferably not exceed 2 / 3 of the layer thickness, and a 25T vibratory roller is used for compaction and leveling. After every 2 m of filling, an impact rolling reinforcement layer 25 is set, and a 25KJ triangular impact rolling roller is used for 15 - 20 passes of impact rolling reinforcement treatment. The mechanical traveling speed is controlled between 10 - 15 km / h; according to Figure 3 the route shown, the impact rolling is carried out in circles from one side of the roadbed to the other side. The wheel width of the impact rolling roller is 0.9 m, and the inner distance between the two impact rolling wheels is 1.17 m. For each pass of impact rolling, it is necessary to ensure that the overlapping width of the wheel tracks is not less than 1 / 3 of the wheel width. The elevation is measured every 5 passes of impact rolling, and the final settlement after rolling should ≤ 3 cm, otherwise, the reinforcement compaction should be repeated.

[0049] S5. Construction of the crushed stone leveling layer 22: A 20 cm crushed stone leveling layer 22 is filled on the top of the mudstone rockfill roadbed layer 2, and it is leveled and compacted to ensure the coordinated deformation of the overall roadbed. A layer of double-sided tensile plastic grille is laid on the top of the crushed stone layer to form a plastic grille layer 26, with a specification of TGSG5050, a longitudinal and transverse lap length ≥ 50 cm, and it is fixed with U-shaped nails.

[0050] S6. Construction of crushed stone soil layer 23: Improve the excavated soil according to the soil conditions in the project area. Mix 40% crushed stone into the original soil and form a layered filling and compaction of crushed stone soil. The paving thickness of each layer is ≤ 30 cm, the filler particle size is ≤ 15 cm, and a vibratory roller is used for layered compaction. The compaction degree is ≥ 93%. The water content of the filler is controlled within ± 2% of the optimum water content. During the filling process of the crushed stone soil, every time the height reaches 1.8 m, a layer of double-sided tensile plastic grid is laid to form the plastic grid layer 26, with the specification of TGSG5050. The longitudinal and transverse lap lengths are ≥ 50 cm, and U-shaped nails are used for fixation. After the crushed stone soil layer 23 is filled to a height of 2 m each time, an impact rolling reinforcement layer 25 is set. A 25 KJ three-sided impact rolling roller is used for 15 - 20 times of impact rolling reinforcement treatment, and the mechanical traveling speed is controlled between 10 - 15 km / h; According to Figure 3 the route shown, circle and roll from one side of the roadbed to the other side. For each pass of rolling, it is necessary to ensure that the overlapping width of the wheel tracks is not less than 1 / 3 of the wheel width. Measure the elevation once every 5 passes of rolling. The final settlement after rolling should be ≤ 3 cm, otherwise, the reinforcement compaction should be repeated. Cycle the construction in sequence until the elevation of the roadbed top surface. The interval distance between the plastic grid layer 26 and the impact rolling reinforcement layer 25 is ≥ 20 cm.

[0051] S7. Construction of roadbed strengthening layer 24: An 80 cm crushed stone roadbed strengthening layer 24 is set on the top surface of the crushed stone soil layer 23, with the crushed stone content of 60%. A layer of double-sided tensile plastic grid is set in the roadbed strengthening layer 24 to form the plastic grid layer 26, with the longitudinal and transverse lap lengths ≥ 50 cm, and U-shaped nails are used for fixation. The compaction degree of the roadbed strengthening layer 24 is ≥ 95%. The water content of the filler is controlled within ± 2% of the optimum water content. After the construction of the roadbed strengthening layer 24 is completed and inspected and qualified, the pavement structure 7 is constructed.

[0052] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mudstone-filled high-fill roadbed structure, characterized in that: include: A base (1), wherein a gravel blind ditch (3) is provided on the surface of the base (1) in the roadbed filling area, and drainage side ditches (4) are provided on the surface of the base (1) on both sides of the roadbed and extend along the length direction of the roadbed; A roadbed (2) is built on the base (1), wherein the roadbed (2) is provided with multiple horizontally arranged impact rolling reinforcement layers (25) and multiple horizontally arranged plastic grille layers (26), wherein the multiple impact rolling reinforcement layers (25) and the multiple plastic grille layers (26) are arranged at intervals in the vertical direction, respectively, the gravel blind ditch (3) is buried in the roadbed (2), and the two drainage side ditches (4) are respectively located on both sides of the roadbed (2).

2. The mudstone-filled high-fill roadbed structure according to claim 1 is characterized by: The road base layer (2) comprises a mudstone filling layer (21), a crushed stone leveling layer (22) and a crushed stone soil layer (23) which are filled in sequence from bottom to top.

3. The mudstone-filled high-fill roadbed structure according to claim 2 is characterized in that: Multiple layers of the impact rolling reinforcement layer (25) are distributed in the mudstone filling layer (21) and the crushed stone soil layer (23).

4. The mudstone-filled high-fill roadbed structure according to claim 2 is characterized in that: The roadbed (2) further comprises a roadbed reinforcement layer (24) arranged on top of the crushed stone soil layer (23), and the pavement structure (7) is arranged on top of the roadbed reinforcement layer (24).

5. The mudstone-filled high-fill roadbed structure according to claim 4 is characterized in that: A layer of the plastic grille layer (26) is arranged on the top of the crushed stone leveling layer (22), a layer of the plastic grille layer (26) is arranged inside the roadbed reinforcement layer (24), and the remaining plastic grille layers (26) are arranged in the crushed stone leveling layer (22).

6. The mudstone-filled high-fill roadbed structure according to claim 1 is characterized by: The surface of the base (1) is a slope, and the surface of the base (1) is arranged in a step shape.

7. The mudstone-filled high-fill roadbed structure according to claim 2 is characterized by: The mudstone filling layer (21) is filled to a set height from the natural ground elevation.

8. The mudstone-filled high-fill roadbed structure according to claim 1 is characterized by: Displacement side piles (5) are respectively arranged on the base (1) at both sides of the roadbed (2).

9. The mudstone-filled high-fill roadbed structure according to claim 1, characterized in that: The roadbed (2) is provided with settlement observation pipes (6) at the road centerline and both sides of the road, the lower end of the settlement observation pipe (6) extending to the base (1) and the upper end extending to the top of the roadbed (2).

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