CN220846895U - Roadbed structure for filling phyllite filler into high embankment - Google Patents

Abstract

The application relates to the field of roadbeds, in particular to a roadbed structure for filling a high embankment with phyllite filler. Solves the problem that the phyllite is adopted as the filler simply and is easy to collapse. Including laying in the rubble drainage bed course on former ground, retaining wall to and the road surface layer, and bordure at the road bed edge, its characterized in that still includes: phyllite filler, the said phyllite filler is filled between drainage bedding course of the rubble and pavement layer; wherein the phyllite fillers are arranged in layers, and the layered positions are in a step shape; wherein, lay waterproof geotechnique cloth layer in layering department. The scheme adopts layered phyllite, and ensures the stability of roadbed with phyllite as filler.

Description

Roadbed structure for filling phyllite filler into high embankment

Technical Field

The application relates to the field of roadbeds, in particular to a roadbed structure for filling a high embankment with phyllite filler.

Background

Phyllite is a low-grade metamorphic rock with thousands of structures, joint cracks develop, the strength is low, the weathering degree is different, the phyllite is easy to soften and disintegrate when meeting water, the deformation resistance is poor, secondary crushing is easy to occur after vibration rolling, the engineering performance is special and the variability is large, the phyllite is not directly used as a embankment filler generally, and the engineering problems of large phyllite abandoning amount, lack of roadbed filler, high construction cost, high environmental risk and the like are caused.

The application number 202020787520.2 provides a roadbed structure filled with phyllite filler, the roadbed structure comprises phyllite filler which is filled and compacted uniformly, and the characteristics that the phyllite is easy to soften and disintegrate when meeting water and easy to be crushed secondarily after vibrating and rolling are found in site construction, and collapse is easy to occur when the phyllite is simply paved.

Disclosure of Invention

In view of the above, the application provides a roadbed structure for filling a high embankment with phyllite filler, which can effectively solve the problem that the phyllite filler is simply adopted to easily collapse. The scheme adopts layered phyllite, and ensures the stability of roadbed with phyllite as filler.

In a first aspect, the present application provides a roadbed structure for constructing a high embankment by phyllite filler, which comprises a crushed stone drainage pad layer laid on the original ground, a retaining wall, a roadbed layer, and a covered edge at the edge of the roadbed, and further comprises:

Phyllite filler, the said phyllite filler is filled between drainage bedding course of the rubble and pavement layer;

Wherein the phyllite fillers are arranged in layers, and the layered positions are in a step shape;

Wherein, lay waterproof geotechnique cloth layer in layering department.

Further, the broken stone drainage cushion layer is arranged in a step shape.

Furthermore, the wrapping edge is paved by phyllite and cement in a doping way, and the cement doping amount is 3%.

Further, the contact part of the wrapping edge and the phyllite filler is in a step shape.

Further, the waterproof geotechnical cloth layer is fixed through anchors.

Further, the pavement layer includes:

the composite geomembrane is paved above the phyllite filler; and

The road bed and the pavement structure layer are sequentially laid on the composite geomembrane.

Compared with the prior art, the beneficial effect of this scheme lies in:

1. Powerful load carrying capacity: the phyllite filler has higher strength in a dry state and can bear larger load pressure, thereby providing a stable roadbed structure. The stepped layering arrangement may increase the stability and load bearing capacity of the filler.

2. Good drainage performance: the broken stone drainage cushion layer can effectively drain water and prevent water from accumulating in the roadbed. The 3% cement improves phyllite as edge covering soil of the edge of the roadbed, prevents the water inside the phyllite filler roadbed from being immersed, and prevents the roadbed from softening and sinking.

3. The impermeability is strong: the waterproof geotechnical cloth layer is paved at the layering position, so that moisture can be prevented from penetrating into the roadbed, and the stability of the roadbed is maintained. The waterproof geotechnical cloth layer can effectively separate the penetration of moisture and improve the impermeability of the roadbed.

4. Stability of the pavement layer is improved: the phyllite filler is filled between the broken stone drainage cushion layer and the pavement layer, so that uniform support can be provided, and the stability of the pavement layer is improved. The layered arrangement and the step-shaped structure of the filler can reduce the deformation and sedimentation of the pavement layer and prolong the service life of the pavement.

5. Economical and practical: phyllite filler is a common tunnel slag and side slope discarding material. The roadbed structure of the high embankment is filled by phyllite filler, so that the solid waste resource utilization can be realized on the premise of ensuring the structural stability, and the engineering cost is reduced.

Drawings

Fig. 1 is a schematic structural view showing a roadbed structure for filling a high embankment with phyllite filler according to the present application.

The figure shows:

A crushed stone drainage pad 100,

Retaining wall 200,

Phyllite packing 300, waterproof geotechnical cloth layer 310 and anchor 320

400 Edge-covering,

Pavement layer 500, composite geomembrane 510, pavement bed 520, pavement structure layer 530.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

An exemplary roadbed structure for filling a high embankment with phyllite filler is as follows:

as shown in fig. 1, a roadbed structure for filling a high embankment with phyllite filler includes a crushed stone drainage mat layer 100, a retaining wall 200, phyllite filler 300, a covering edge 400, and a road surface layer 500.

The broken stone drainage blanket 100 is paved on the original ground, after the surface cleaning treatment of the original ground, an 80cm thick broken stone drainage blanket is filled on the ground surface and used as a permeable layer to block capillary water so as to prevent the capillary water from rising. Specifically removing surface soil with the thickness of 30cm on the surface layer of the ground, and rolling by adopting a road roller with the dead weight of more than 26t until no wheel track exists before filling, wherein the compactness is not lower than 90%; when the ground transverse slope is steeper than 1:5, a step is excavated, the inward slope is 4%, and then a 0.8m thick gravels cushion layer is filled on the ground surface and used as a permeable layer to block capillary water so as to prevent the capillary water from rising.

The roadbed structure is provided with a retaining wall 200.

Phyllite filler 300 is laid on the crushed stone drainage mat 100, as shown in fig. 1, phyllite filler 300 is laid in layers, each layer is provided with a stepped waterproof geotextile 310, and the waterproof geotextile 310 is fixed with anchors.

The phyllite filler 300 is required to meet the requirement that the CBR of the upper embankment is more than or equal to 4%, the compactness is more than or equal to 94%, the CBR of the lower embankment is more than or equal to 3%, and the compactness is more than or equal to 94%.

Phyllite is used as a filler, the loose paving thickness is not more than 30cm, after a bulldozer carries out rough leveling, a tester carries out water content measurement on the paving filler, if the water content exceeds the allowable deviation range of the optimal water content, stirring and airing are needed, and if the water content does not reach the optimal water content, stirring and water supplementing are needed in time. Before paving the road bed, paving a layer of composite geomembrane at the bottom, preventing rainwater from seeping and strictly controlling traffic, and opening the traffic after the road bed is constructed.

When the phyllite is adopted to fill the roadbed for layered paving, the edge 400 is processed by mixing 3% cement and synchronously processing the phyllite, and the thickness is not less than 2m. During construction, firstly paving fillers on two sides of a side slope, drawing a boundary line by lime lines, then paving phyllite filling cores, transversely paving 2 road roller widths on a roadbed, and then timely adopting a road stirring method to mix 3% cement of the fillers, wherein the mixing time is not less than 2 times, the mixing is uniform, and the depth is preferably 1-2 cm higher than that of the lower layer. After mixing, a special person is arranged to check the mixing depth and sample for titration test to ensure that the ash dosage is qualified.

The phyllite filler 300 has a particle size of not more than 150mm. After rough leveling by a bulldozer, scraping and fine leveling by a grader to form a road arch, and then crushing the road arch by adopting a claw mill for 1 time. The part which cannot be broken can be manually removed, so that the surface is smooth.

The phyllite filler 300 is rolled by a self-propelled vibratory roller with the rolling time of not less than 26t for 6 times, namely a mode of '1+2+2+1', static pressure for 1 time, weak vibration for 2 times, strong vibration for 2 times and static pressure for 1 time. Longitudinal rolling is adopted, longitudinal stubble connecting overlaps 1\3 wheels wide, transverse stubble connecting overlaps 0.5m, rolling sequences are firstly two sides and then the middle, and the super high section is pressed for 2 times from the inner side to the outer side, and the edge of the roadbed is pressed more.

After the phyllite filler 300 is filled, a pavement layer 500 is disposed on the phyllite filler 300, and the pavement layer 500 includes: a composite geomembrane 510, the composite geomembrane 510 being laid over the phyllite filler 300; and a road bed 520 and a pavement structure layer 530, wherein the road bed 520 and the pavement structure layer 530 are sequentially laid on the composite geomembrane 510.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features herein.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is to be construed as including any modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (5)

1. The utility model provides a phyllite packs roadbed structure of building high embankment, includes to lay in rubble drainage bed course, retaining wall on former ground to and at the road bed edge bordure, its characterized in that still includes:

Phyllite filler, the said phyllite filler is filled between drainage bedding course of the rubble and pavement layer;

Wherein the phyllite fillers are arranged in layers, and the layered positions are in a step shape;

Wherein, lay waterproof geotechnique cloth layer in layering department.

2. The roadbed structure for filling a high embankment with phyllite filler according to claim 1, wherein the crushed stone drainage mat layers are arranged in a step shape.

3. The roadbed structure for filling a high embankment according to claim 1, wherein the contact part of the binding and the phyllite filler is in a step shape.

4. The roadbed structure for filling a high embankment according to claim 1, wherein the waterproof geotechnical cloth layer is fixed by anchors.

5. The roadbed structure for filling a high embankment according to claim 1, wherein the roadbed layer comprises:

the composite geomembrane is paved above the phyllite filler; and

The road bed and the pavement structure layer are sequentially laid on the composite geomembrane.