CN113265920A - Grading machine block stone-soil road foundation cushion layer and preparation method thereof - Google Patents
Grading machine block stone-soil road foundation cushion layer and preparation method thereof Download PDFInfo
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- CN113265920A CN113265920A CN202110527419.2A CN202110527419A CN113265920A CN 113265920 A CN113265920 A CN 113265920A CN 202110527419 A CN202110527419 A CN 202110527419A CN 113265920 A CN113265920 A CN 113265920A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
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- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention relates to a graded machine-made block stone-soil road foundation cushion layer and a preparation method thereof, wherein the foundation cushion layer comprises a machine-made block stone cushion layer, an underlayer, a base layer and a surface layer, the machine-made block stone cushion layer is positioned on a road bed, and the underlayer is arranged between the machine-made block stone cushion layer and the base layer; the basic unit set up in the subbase layer with between the surface course, the surface course is located on the basic unit, and mechanism stone bed course includes regular rectangle stone. The invention adopts the machine-made stone cushion layer to replace the prior multi-layer composite cushion layer. The machine-made stone cushion layer is made of regular rectangular stones with the same size and shape and a certain proportion of stone powder fiber foam aggregate, the regular rectangular stones are directly overlapped in a staggered mode, a certain gap is reserved between the regular rectangular stones, good compressive strength and water permeability are guaranteed, and the machine-made stone cushion layer plays a role in uniformly transferring load and absorbing energy and buffering. Whole mechanism stone bed course is an wholeness layer body structure, all comprises same kind of building stones, can accomplish the compaction of paving rapidly, very big reduction the time limit for a project, reach quick construction effect.
Description
Technical Field
The invention belongs to the technical field of roadbed cushions, and particularly relates to a graded machine-made stone-soil roadbed cushion and a preparation method thereof.
Background
The bedding layer is a structural layer between the subbase layer and the soil foundation, and in some soil foundations in bad areas, the bedding layer tends to play a role in isolating and protecting the foundation. In addition, the cushion layer also needs to satisfy requirements of good rigidity, compressive strength, water permeability and the like.
In the prior art, the cushion layer is usually compacted by adopting loose granular materials such as coal cinder, slag, gravel soil and the like, and although the water permeability is better, the cushion layer is not easy to compact, so that the bearing capacity and the pressure resistance of the ground are poorer. If easily compacted soil such as sandy soil, coarse-grained soil, cement stone and water mixture is used as the cushion material, the water permeability of the cushion is reduced, and the economic cost is high. Therefore, a plurality of layers of composite cushions are often adopted in engineering to ensure various performances of the cushions. By adopting a plurality of layers of composite cushion layers, each layer needs to be compacted after being paved, and the next layer is paved after the compaction degree reaches the standard, so that the engineering workload is greatly increased, and the cost consumption is increased.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a graded machine-made stone-soil roadbed bedding layer, which solves the above-mentioned problems occurring in the prior art.
The above technical object of the present invention will be achieved by the following technical solutions.
A graded machine-made blockstone-soil road bedding course comprises a machine-made blockstone bedding course, a subbase layer, a base layer and a surface layer;
wherein the mechanically-made stone cushion layer is positioned on a roadbed, and the subbase layer is arranged between the mechanically-made stone cushion layer and the base layer; the base layer is arranged between the subbase layer and the surface layer, and the surface layer is positioned on the base layer;
the machined stone pad layer comprises regular rectangular stones.
The above aspects and any possible implementation manner further provide an implementation manner, and the size range of the regular rectangular stone block is 10-20 mm long, 5-15 mm wide and 5-15 mm high.
The above aspects and any possible implementations further provide an implementation where the machined stone pad has a thickness of 20cm to 30 cm.
The above aspects and any possible implementation manners further provide an implementation manner, and the porosity n of the machined stone cushion layer is less than or equal to 29%, and the compaction coefficient k is greater than or equal to 0.90.
The above aspects and any possible implementations further provide an implementation in which the machined stone pad further comprises a stone dust fiber foam aggregate.
The above aspects and any possible implementations further provide an implementation in which the stone dust fiber foam aggregate includes basalt fiber BF, stone dust SP, polystyrene foam EPS, and a blending agent.
The above aspects and any possible implementation manners further provide an implementation manner, and the weight ratio of the stone dust fiber foam aggregate is as follows: 0 to 0.5 percent of basalt fiber BF, 2.0 to 3.5 percent of stone powder SP, 0 to 0.1 percent of polystyrene foam EPS and 95 to 97 percent of mixing agent.
The above aspects and any possible implementations further provide an implementation where the stone dust fiber foam aggregate has a particle size of 5-10 mm.
The above aspects and any possible implementations further provide an implementation where the regular rectangular stone block has dimensions of 15mm long, 10mm wide and 10mm high.
The invention also provides a method for preparing the graded machine block stone-soil roadbed cushion, which comprises the following steps:
s1, preparing a mixture for preparing a machine-made stone cushion layer;
s2, paving the mixture into a roadbed cushion model, and paving and compacting according to the set paving thickness to prepare the machine-made stone cushion;
s3, paving the subbase layer on the manufactured machine-made stone cushion layer; and paving the base layer on the subbase layer, and finally paving the surface layer on the base layer to form a graded machine block stone-soil road base cushion layer.
The invention has the beneficial technical effects
The grading machine block stone-soil roadbed cushion layer comprises a machine block stone cushion layer, an underlayer, a base layer and a surface layer, wherein the machine block stone cushion layer is positioned on a roadbed, and the underlayer is arranged between the machine block stone cushion layer and the base layer; the basic unit set up in the subbase with between the surface course, the surface course is located on the basic unit, mechanism stone bed course includes regular rectangle stone. The invention adopts the machine-made stone cushion layer to replace the traditional multilayer composite cushion layer, and the machine-made stone cushion layer comprises regular rectangular stones. The machine-made stone block bedding layer is made by mixing regular rectangular stone blocks with consistent sizes and shapes and stone powder in a certain proportion, and the regular rectangular stone blocks are directly overlapped in a staggered mode, so that a certain gap is reserved. The good compressive strength and the good water permeability are ensured, and the energy absorption and buffering performance of the running vehicle under the dynamic load condition is greatly improved. Whole mechanism stone bed course is an wholeness layer body structure, all comprises same kind of building stones, can accomplish the compaction of paving rapidly, very big reduction the time limit for a project, reach quick construction effect.
Drawings
Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view of an overall layered structure of a roadbed cushion layer in the embodiment of the invention.
In the figure: 1 machine-made stone cushion layer, 2 subbase layers, 3 base layers and 4 surface layers.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific examples, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, the present invention is a schematic diagram of an overall layered structure of a roadbed cushion, which sequentially comprises from bottom to top: the roadbed comprises a machined stone cushion layer 1, an underlayer 2, a base layer 3 and a surface layer 4, wherein the machined stone cushion layer 1 is positioned on the roadbed, and the underlayer 2 is arranged between the machined stone cushion layer 1 and the base layer 3; the base layer 3 is arranged between the subbase layer 2 and the surface layer 4, the surface layer 4 is positioned on the base layer 3, the surface layer 4, the base layer 3, the subbase layer 2 and the mechanism stone cushion layer 1 are sequentially arranged on a structural layer above the roadbed from top to bottom, the mechanism stone cushion layer 1 is used for uniformly transmitting the upper dead weight load and the dynamic load of road running vehicles to the roadbed below the mechanism stone cushion layer, and the mechanism stone cushion layer 1 has the rigidity characteristic and also has the flexibility characteristic; wherein the rigidity characteristic shows that bearable all transmits static force and power to the road bed in below, and the flexible characteristic is that mechanism stone bed course 1 has buffer function, can consume static force and power simultaneously and disperse, plays good energy-absorbing cushioning effect, adopts mechanism stone bed course 1 can effectively ensure that the road of laying is level and smooth, has avoided the differential settlement of strong load effect, and is smooth and easy and safe crucial to road traffic.
Preferably, the regular rectangular stones in the machine-made stone cushion layer 1 in the embodiment of the present invention have a plurality of different specifications, a plurality of different sizes of regular rectangular stones can be used in the same or different machine-made stone cushion layers, and the size ranges of the plurality of regular rectangular stones are selected from the length range of 10 to 20mm, the width range of 5 to 15mm, and the height range of 5 to 15mm, the sizes of the regular rectangular stones can be completely different according to the actual site road condition requirements of the road to be paved, and any size within the above-mentioned length, width, and height value ranges can be selected, so that the formed machine-made stone cushion layer 1 can meet the requirements of uniformly transmitting borne static/dynamic force and micro-deformation buffer.
Preferably, the particle size of the stone dust fiber foam aggregate in the embodiment of the invention is 5-10mm, and the stone dust fiber foam aggregate with the particle size is beneficial to fully filling gaps among regular rectangular stones with different sizes.
Preferably, the thickness of the machine-made stone cushion layer 1 is 20 cm-30 cm, and the plate-shaped structure of the machine-made stone cushion layer 1 with the thickness is beneficial to the load transmission and the buffering and energy absorption under the micro-deformation condition.
Preferably, the porosity n of the machined stone pad layer 1 in the embodiment of the invention is less than or equal to 29%, and the compaction coefficient k is greater than or equal to 0.90, the porosity is favorable for the machined stone pad layer 1 to play the function of micro-deformation buffer absorption, and meanwhile, the high number of compaction coefficients enables the machined stone pad layer 1 to simultaneously bear and transmit the load from the upper side of the machined stone pad layer 1.
Preferably, the particle size of the stone dust fiber foam aggregate in the embodiment of the present invention is 6mm, and the particle size is determined according to the thickness of the machine-made stone bedding layer 1, for example, when the thickness of the machine-made stone bedding layer 1 is 25cm, the particle size is about 0.024 times of the thickness of the machine-made stone bedding layer 1, and the size is helpful for free filling of the stone dust fiber foam aggregate, and improves the connection compactness of regular rectangular stones among different sizes. Considering the thickness of the bedding course, the thickness of the machine-made stone bedding course 1 may preferably be 25cm, which is advantageous for the stability and adhesiveness of the whole bedding course.
Preferably, the dimensions of the embodiment of the invention are selected as the block with the largest dimensions, being 15mm long, 10mm wide and 10mm high, and with various regular rectangular blocks, being greater or smaller in size than the regular rectangular blocks, being used in gradations, to increase the rigidity characteristics of the mechanically machined block mat 1 and the paving stability of its overall structure.
The stone powder fiber foam aggregate in the embodiment of the invention comprises basalt fiber BF, stone powder SP, polystyrene foam EPS and a mixing agent, wherein the weight ratio is as follows: 0 to 0.5 percent of basalt fiber BF, 2.0 to 3.5 percent of stone powder SP, 0 to 0.1 percent of polystyrene foam EPS and 95 to 97 percent of mixing agent. The weight proportion in the range can ensure that the manufactured machine-made stone cushion layer 1 has good flexibility characteristic and plays a good role in buffering.
Preferably, the stone powder fiber foam aggregate in the implementation of the invention adopts the following weight ratio: the basalt fiber BF is 0.18%, the stone powder SP is 3.10%, the polystyrene foam EPS is 0.07% and the mixing agent is 96.65%, under the setting of the mixture ratio, the machine-made stone cushion layer 1 can achieve the optimal flexible compressive strength and buffering performance, and the integral stability of the structure is facilitated.
The invention also provides a method for preparing the graded machine block stone-soil roadbed cushion, which comprises the following steps:
s1, preparing a mixture for preparing a machine-made stone cushion layer;
s2, paving the mixture into a roadbed cushion model, and paving and compacting according to the set paving thickness to prepare the machine-made stone cushion;
s3, paving the subbase layer on the manufactured machine-made stone cushion layer; and paving the base layer on the subbase layer, and finally paving the surface layer on the base layer to form a graded machine block stone-soil road base cushion layer.
Specifically, the invention improves the prior roadbed cushion construction mode and material selection, and adopts a machine-made stone cushion to replace the traditional multilayer composite cushion. When manufacturing a graded machine block stone-soil roadbed cushion layer, the following steps are adopted:
(1) firstly, preparing and uniformly stirring all components of the stone powder fiber foam aggregate according to a preset weight ratio;
(2) fully mixing regular rectangular stones with different shapes and sizes with the proportioned stone powder fiber foam aggregate according to a proper proportion to obtain a mixture;
(3) paving the mixture into a roadbed cushion model through a road paver, paving according to the set paving thickness of the mixture, repeatedly compacting for many times by adopting compaction equipment after paving is finished, and forming a machine-made stone cushion layer 1 when the compaction degree meets the requirement;
(4) paving a subbase layer 2 on the machine-made stone cushion layer 1 prepared in the step (3); laying a base layer 3 on the subbase layer, laying a surface layer 4 on the base layer to form a graded machine block stone-soil roadbed cushion layer, and carrying out construction operations such as paving and compacting on the graded machine block stone-soil roadbed cushion layer by adopting mechanical devices such as compacting and paving equipment.
The preparation method of the roadbed cushion layer effectively shortens the construction period of the road roadbed and improves the compression strength, the water permeability and other properties of the roadbed cushion layer.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the invention as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A graded machine-made stone-soil road bedding course is characterized in that the bedding course comprises a machine-made stone bedding course, a subbase layer, a base layer and a surface layer;
wherein the mechanically-made stone cushion layer is positioned on a roadbed, and the subbase layer is arranged between the mechanically-made stone cushion layer and the base layer; the base layer is arranged between the subbase layer and the surface layer, and the surface layer is positioned on the base layer;
the machined stone pad layer comprises regular rectangular stones.
2. The graded machine block-dirt subgrade course of claim 1, characterized in that the regular rectangular blocks have dimensions ranging from 10-20 mm long, 5-15 mm wide and 5-15 mm high.
3. The graded machine stone-dirt bedding course of claim 1, wherein the machine stone bedding course has a thickness of 20cm to 30 cm.
4. The graded machined block-dirt subgrade layer according to claim 2, characterized in that the porosity n of the machined block bedding layer is less than or equal to 29 percent, and the compaction coefficient k is more than or equal to 0.90.
5. The graded machined block-dirt bedding course of claim 3, further comprising a stone dust fiber foam aggregate.
6. The graded machined block stone-dirt road bed course of claim 5, wherein the stone dust fiber foam aggregate includes basalt fiber BF, stone dust SP, polystyrene foam EPS and admixtures.
7. The graded machine block stone-dirt road bed cushion according to claim 6, wherein the weight ratio of the stone powder fiber foam aggregate is as follows: 0 to 0.5 percent of basalt fiber BF, 2.0 to 3.5 percent of stone powder SP, 0 to 0.1 percent of polystyrene foam EPS and 95 to 97 percent of mixing agent.
8. The graded machined block-dirt bedding course according to claim 6, characterised in that the particle size of the stone dust fibre foam aggregate is 5-10 mm.
9. The graded machined block-dirt bedding course of claim 2, wherein the dimensions of the regular rectangular block are 15mm long, 10mm wide and 10mm high.
10. A method for preparing a graded machined block-dirt bedding course as claimed in any one of claims 1 to 9, characterised by the steps of:
s1, preparing a mixture for preparing a machine-made stone cushion layer;
s2, paving the mixture into a roadbed cushion model, and paving and compacting according to the set paving thickness to prepare the machine-made stone cushion;
s3, paving the subbase layer on the manufactured machine-made stone cushion layer; and paving the base layer on the subbase layer, and finally paving the surface layer on the base layer to form a graded machine block stone-soil road base cushion layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110527419.2A CN113265920A (en) | 2021-05-14 | 2021-05-14 | Grading machine block stone-soil road foundation cushion layer and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110527419.2A CN113265920A (en) | 2021-05-14 | 2021-05-14 | Grading machine block stone-soil road foundation cushion layer and preparation method thereof |
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| CN113265920A true CN113265920A (en) | 2021-08-17 |
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| CN107268434A (en) * | 2017-06-27 | 2017-10-20 | 长安大学 | One kind is applied to the flexible paving structure of the regional Steel Bridge Deck of damp and hot high temperature and construction method |
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-
2021
- 2021-05-14 CN CN202110527419.2A patent/CN113265920A/en active Pending
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| JP2008050212A (en) * | 2006-08-25 | 2008-03-06 | Denki Kagaku Kogyo Kk | Spray material and spraying method using the same |
| CN103669150A (en) * | 2012-09-18 | 2014-03-26 | 天津绿苑园林绿化工程有限公司 | Garden path structure |
| CN205856961U (en) * | 2016-07-22 | 2017-01-04 | 山西省交通科学研究院 | A kind of high-mechanic block-stone pavement structure being applicable to very heavy traffic |
| CN106223158A (en) * | 2016-08-31 | 2016-12-14 | 中铁二院重庆勘察设计研究院有限责任公司 | A kind of tramcar basalt fibre composite pavement structure |
| CN107268434A (en) * | 2017-06-27 | 2017-10-20 | 长安大学 | One kind is applied to the flexible paving structure of the regional Steel Bridge Deck of damp and hot high temperature and construction method |
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