CN113652913B - Novel solidified silt roadbed road extension splicing structure and method - Google Patents
Novel solidified silt roadbed road extension splicing structure and method Download PDFInfo
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/36—Bituminous materials, e.g. tar, pitch
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/001—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing unburned clay
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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
- E01C3/04—Foundations produced by soil stabilisation
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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
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a novel solidified silt subgrade road extension splicing structure and a method, belonging to the field of bad soil resource utilization and road engineering, aiming at solving the technical problem of improving the performance of silt subgrade roads and realizing the extension and width splicing of roads, and adopting the technical scheme that: the construction method comprises an original road structure and a structural layer splicing step, wherein traditional material roadbeds and solidified silt roadbeds which are alternately arranged are arranged at the structural layer splicing step in a layered mode, the solidified silt roadbeds are paved in a Z-shaped layered mode, and semi-flexible silt roadbeds are adopted in the solidified silt roadbeds. The method comprises the following steps: the original road structure is provided with structure layer splicing steps after being excavated according to an old road surface layer, an old road base layer, an old road bed and an old road subgrade; paving a solidified silt roadbed by adopting a semi-flexible silt roadbed material; during construction, a traditional material roadbed and a solidified silt roadbed are alternately paved in layers; and after each layer is filled, the next layer is filled after the curing is carried out for 3 d.
Description
Technical Field
The invention relates to the field of resource utilization of bad soil and road engineering, in particular to a novel solidified silt roadbed road extension splicing structure and method.
Background
With the rapid development of economic society and the increase of traffic volume, the actual traffic volume of many roads is far beyond the designed traffic volume, the service level is reduced, and the number of safety accidents is increased. The original road traffic capacity can not meet the social needs, and the road reconstruction and expansion project is urgent. The reconstruction and the expansion of the road need to piece the old road wide, and the filling of the new road needs to consume a large amount of earthwork, which causes the waste of land resources. With the high-speed increase of the engineering construction speed and quantity in China, high-quality soil and stone materials which can directly meet the road performance are in full shortage, and the ecological environment can be further damaged by excessive mining. How to use local materials and fully develop engineering property poor soil to prepare a novel road material has been generally concerned by society.
The silty soil is widely distributed in the middle and downstream alluvial regions of main rivers such as yellow river, Huaihe river and the like, and has the characteristics of low content of sticky grains, poor grain composition, high permeability, remarkable water sensitivity and the like. If the concrete is directly used for road subgrade filling, under the influence of factors such as natural precipitation and capillary water rise, the strength is seriously attenuated, the durability is insufficient, and serious diseases such as settlement deformation, slurry turning, collapse, freeze thawing, longitudinal cracking and the like occur. Therefore, the silty soil is a natural material with poor engineering properties and cannot be directly applied to road engineering. Therefore, how to improve the road performance of silty soil and realize the road expansion and width splicing is a technical problem to be solved urgently at present.
Disclosure of Invention
The invention provides a novel solidified silt subgrade road expansion splicing structure and method, and aims to solve the problem of how to improve the performance of silt subgrade roads and realize road expansion splicing.
The technical task of the invention is realized according to the following mode, the novel solidified silt subgrade road expansion splicing structure comprises an original road structure and a structural layer splicing step, wherein the original road structure comprises an old road surface layer, an old road base layer, an old road bed and an old road subgrade which are sequentially arranged from top to bottom, traditional material subgrades and solidified silt subgrades which are alternately arranged are arranged at the structural layer splicing step in a layered mode, the solidified silt subgrade is paved in a Z-shaped layered mode, and the solidified silt subgrade is made of semi-flexible silt subgrade materials.
Preferably, the solidified silt roadbed is a Z-shaped solidified silt roadbed consisting of an upper extension part, an overlapping part and a lower extension part, and the length of the overlapping part is 1-2 m; the upper extension part is located on the structural layer splicing step, the length of the upper extension part is 2-5 times, preferably 3 times, of the thickness of the upper extension part, and the thickness of the lower extension part and the thickness of the upper extension part are 30-50 cm.
Preferably, the semi-flexible silt roadbed material is prepared by taking silt as a raw material, blending with a flexible curing agent, stirring, compacting and preserving; the semi-flexible silt roadbed material comprises the following components in parts by weight:
88-95 parts of silty soil;
5-12 parts of a flexible curing agent.
Preferably, the semi-flexible silt subgrade material comprises the following components in parts by weight:
91-94 parts of silty soil;
6-9 parts of a flexible curing agent.
Preferably, the flexible curing agent is formed by grinding and mixing ash and sulfonated asphalt powder, and the fineness of the finished flexible curing agent is less than 120 meshes and the water content is less than 3%; the flexible curing agent comprises the following components in parts by weight:
55-65 parts of ash;
35-45 parts of sulfonated asphalt powder.
Preferably, the flexible curing agent comprises the following components in parts by weight:
58-63 parts of ash;
37-42 parts of sulfonated asphalt powder.
Preferably, the cohesive force of the semi-flexible silt subgrade material is more than 350kPa, preferably 350-458 kPa, and the compressive strength is more than 1.5MPa, preferably 1.5-1.62 MPa.
Preferably, the settlement difference of the conventional material roadbed and the solidified silt roadbed is not more than +/-3 cm; the thickness of the solidified silt subgrade is 30-50 cm; the equivalent modulus of resilience of the top of the solidified silt subgrade is more than 50 MPa.
A novel solidified silt subgrade road expansion splicing method comprises the following steps:
the original road structure is provided with structure layer splicing steps after being excavated according to an old road surface layer, an old road base layer, an old road bed and an old road subgrade;
paving a solidified silt roadbed by adopting a semi-flexible silt roadbed material;
during construction, a traditional material roadbed and a solidified silt roadbed are alternately paved in layers;
filling the Z-shaped solidified silt subgrade to a designed height, wherein the filling thickness of each layer is 30-50 cm;
and after each layer is filled, curing for 3d, and then filling the next layer.
Preferably, the preparation of the semi-flexible silt roadbed material comprises the following specific steps:
mixing powdery soil serving as a raw material with a flexible curing agent to obtain dry powder; wherein the dry powder comprises the following components in percentage by mass: silty soil: flexible curing agent 90: 10;
mixing the dry powder with water, compacting and preserving to prepare a semi-flexible silt roadbed material; wherein the mass ratio of the dry powder to the water is 1: 0.11;
the cohesive force of the cured semi-flexible silt subgrade material is greater than 350kPa, preferably 350-458 kPa, and the compressive strength is greater than 1.5MPa, preferably 1.5-1.62 MPa.
The novel solidified silt subgrade road expansion splicing structure and the method have the following advantages:
the novel solidified silt road bed adopts a semi-flexible silt road bed material, and has the advantages of micro-damage self-healing, good road performance, low cost, local material utilization and the like;
compared with the traditional road extension and width splicing technology, the splicing structure consumes a large amount of silt and a certain amount of ash which are poor engineering materials, effectively reduces differential settlement and longitudinal cracking of the extended road splicing structure, has the technical advantages of resource conservation, environmental protection, economy and durability, and has wide popularization and application values;
thirdly, the invention forms a road extension splicing integral structure with resource saving, environmental protection and deformation coordination through the technical complementation and synergy between the old road functional steps and the novel solidified silt roadbed;
the Z-shaped solidified silt roadbed can effectively reduce the uneven settlement of new and old roads and avoid the later longitudinal cracking; the permeability and compressibility of the semi-flexible silt subgrade material are far lower than those of uncured silt, and the Z-shaped arrangement can block capillary water rise in the spliced subgrade, compensate natural settlement of the spliced subgrade and finally form deformation coordination with newly increased settlement of an old subgrade under the action of additional load;
according to the invention, the theory of road structure mechanics and deformation coordination is followed, and the interaction between the structural steps and the waterproof anti-cracking type solidified silt subgrade is adopted, so that the new and old roads form an integral structure, and the problems of uneven settlement, longitudinal cracking, long-term stability and the like in the extension project are solved;
the semi-flexible powdery soil road base material used by the invention has semi-flexible engineering characteristics by adding ash and sulfonated asphalt powder, improves the compression resistance and shear strength, bears the action of cyclic load, has good water stability and frost resistance, and can realize self-healing reinforcement when early micro-damage occurs;
the method has the advantages of simple construction process and easy control of process parameters, and colleagues utilize industrial waste materials to a certain extent, realize the local material utilization of the silty soil, save resources, reduce the construction cost, replace the traditional soil and stone filling materials in a large scale, and have high popularization and application values and development prospects.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a novel solidified silt subgrade road expansion splicing structure.
Detailed Description
The novel solidified silt subgrade road extension splicing structure and the method are described in detail below by referring to the attached drawings and specific embodiments of the specification.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and for simplicity in description. And are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in the attached figure 1, the novel solidified silt subgrade road expansion splicing structure comprises an original road structure and a structural layer splicing step, wherein the original road structure comprises an old road surface layer, an old road base layer, an old road bed and an old road subgrade which are sequentially arranged from top to bottom, traditional material subgrades and solidified silt subgrades which are alternately arranged are arranged at the structural layer splicing step in a layered mode, the solidified silt subgrade is paved in a Z-shaped layered mode, and the solidified silt subgrade is made of semi-flexible silt subgrade materials. The Z-shaped solidified silt subgrade is provided with two layers, and the two Z-shaped solidified silt subgrades are arranged at intervals. The solidified silt roadbed is a Z-shaped solidified silt roadbed consisting of an upper extension part, an overlapping part and a lower extension part, and the length of the overlapping part is 1.5 m; the upper extension part is positioned on the structural layer splicing step, the length of the upper extension part is 3 times of the thickness of the upper extension part, and the thickness of the lower extension part and the upper extension part is 30 cm.
[ PREPARATION OF FLEXIBLE SOLIDIFYING AGENT ]
The flexible curing agent is formed by grinding and mixing ash and sulfonated asphalt powder, the fineness of the finished product of the flexible curing agent is less than 120 meshes, and the water content is less than 3 percent; the flexible curing agent comprises the following components in percentage by weight:
[ PREPARATION OF SEMI-FLEXIBLE POWDERED EARTH MATERIALS ]
The semi-flexible silt subgrade material is prepared by taking silty soil as a raw material, mixing with a flexible curing agent, stirring, compacting and preserving; the percentage of each component of the semi-flexible silt roadbed material is as follows:
example 2:
the invention discloses a novel solidified silt subgrade road expansion splicing method, which comprises the following steps:
(1) old road structure: the old pavement layer structure comprises an upper layer (4cmSMA-13, namely an old pavement layer), a middle layer (5cmAC-20, namely an old pavement layer) and a lower layer (6cmAC-25, namely an old pavement bed); the base structure (old road bed) comprises an upper base (18cm cement stabilized macadam) and a lower base (18cm cement stabilized macadam); the structure of the upper roadbed is 30cm lime stabilized soil, and the lower roadbed part is 2.4m plain filling soil;
(2) and a structural step is arranged: the height of the structural layer splicing steps is 90cm, the solidified silt roadbed is paved in a Z-shaped layered mode, and the layered height is 30 cm; the other parts are filled by adopting conventional base materials;
(3) solidifying the silt subgrade: in order to effectively overcome the poor engineering characteristics of low clay content, poor grain composition, high permeability, obvious water sensitivity and the like of the silty soil, improve the strength and the water stability, improve the construction working performance and carry out technical improvement treatment on the silty soil; through proportioning and debugging, the preparation of the semi-flexible silt roadbed material is as follows: mixing powdery soil serving as a raw material with a flexible curing agent to obtain dry powder; wherein the dry powder comprises the following components in percentage by mass: silty soil: flexible curing agent 90: 10; mixing the dry powder with water, compacting and preserving to prepare a semi-flexible silt roadbed material; wherein the mass ratio of the dry powder to the water is 1: 0.11; the cohesive force of the semi-cured silt subgrade after curing is 458kPa, and the compressive strength is 1.62 MPa;
(4) and the construction application of the semi-flexible silt roadbed material: during construction, filling the semi-flexible silt roadbed material to a designed height in layers, wherein the filling thickness of each layer is 30 cm; and after each layer is filled, curing for 3d, and then filling the next layer.
[ COMPARATIVE EXAMPLES ]
The comparative example comprises a comparative example 1 and a comparative example 2, the pavement structures and step excavation of the comparative example 1 and the comparative example 2 are the same as those of the example, the difference is that the spliced roadbed of the new road of the example 2 is completely filled with semi-flexible silt roadbed materials, the spliced roadbed of the new road of the comparative example 1 and the spliced roadbed of the new road of the comparative example 2 is completely filled with conventional uncured silt, and settlement observation and detection are carried out after normal construction.
Paving an experimental road according to the following surface structure:
[ Overall Structure inspection ]
The following results were obtained by conducting sedimentation observation on the experimental roads of example 2, comparative example 1 and comparative example 2:
and after the roadbed is constructed to the design height and the last layer of roadbed is cured, carrying out an equivalent modulus of resilience test on the top surface of the roadbed. The equivalent modulus of resilience of the top surface of the roadbed of the embodiment 2 is 92MPa, and the settlement difference of the old road and the new road is 1.25 cm; the equivalent modulus of resilience of the top surface of the roadbed of the comparative example 1 is 118MPa, and the settlement difference of the new road and the old road is-3.73 cm; the equivalent modulus of resilience of the topsides of the roadbed of the comparative example 2 was 42MPa, and the difference in settlement between the old and new roads was 5.26 cm. The result shows that the novel solidified silt subgrade road extension splicing structure has good rigidity and stability, and the Z-shaped layered pavement structure can form synchronous coordination deformation consistency with the old subgrade, so that longitudinal cracking caused by differential settlement is effectively avoided.
Note that: the equivalent modulus of resilience is used as an index of the compressive strength of the soil matrix.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A novel solidified silt subgrade road expansion splicing structure comprises an original road structure and a structural layer splicing step, wherein the original road structure comprises an old road surface layer, an old road base layer, an old road bed and an old road subgrade which are sequentially arranged from top to bottom;
the solidified silt roadbed is a Z-shaped solidified silt roadbed consisting of an upper extension part, an overlapping part and a lower extension part, and the length of the overlapping part is 1-2 m; the upper extension part is located on the structural layer splicing step, the length of the upper extension part is 2-5 times of the thickness of the upper extension part, and the thickness of the lower extension part and the thickness of the upper extension part are 30-50 cm.
2. The novel solidified silt subgrade road extension splicing structure of claim 1, which is characterized in that the semi-flexible silt subgrade material is prepared by taking silt as a raw material, mixing a flexible curing agent, stirring, compacting and maintaining; the semi-flexible silt roadbed material comprises the following components in parts by weight:
88-95 parts of silty soil;
5-12 parts of a flexible curing agent.
3. The novel solidified silt subgrade road extension splicing structure of claim 2, which is characterized in that the semi-flexible silt subgrade material comprises the following components in parts by weight:
91-94 parts of silty soil;
6-9 parts of a flexible curing agent.
4. The novel solidified silt subgrade road extension splicing structure of claim 3, wherein the flexible curing agent is formed by grinding and mixing ash and sulfonated asphalt powder, the fineness of a finished product of the flexible curing agent is less than 120 meshes, and the water content is less than 3%; the flexible curing agent comprises the following components in parts by weight:
55-65 parts of ash;
35-45 parts of sulfonated asphalt powder.
5. The novel solidified silt subgrade road extension splicing structure of claim 4, wherein the flexible curing agent comprises the following components in parts by weight:
58-63 parts of ash;
37-42 parts of sulfonated asphalt powder.
6. The novel solidified silt subgrade road extension splicing structure of claim 1, wherein the cohesive force of the semi-flexible silt subgrade material is more than 350kPa, and the compressive strength is more than 1.5 MPa.
7. The novel solidified silt subgrade road extension splicing structure of claim 1, wherein the settlement difference between the traditional material subgrade and the solidified silt subgrade is not more than +/-3 cm; the thickness of the solidified silt subgrade is 30-50 cm; the equivalent modulus of resilience of the top of the solidified silt subgrade is more than 50 MPa.
8. A novel solidified silt subgrade road expansion splicing method is characterized by comprising the following steps:
the original road structure is provided with structure layer splicing steps after being excavated according to an old road surface layer, an old road base layer, an old road bed and an old road subgrade;
paving a solidified silt roadbed by adopting a semi-flexible silt roadbed material;
during construction, a traditional material roadbed and a solidified silt roadbed are alternately paved in layers;
filling the Z-shaped solidified silt subgrade to a designed height, wherein the filling thickness of each layer is 30-50 cm;
and after each layer is filled, curing for 3d, and then filling the next layer.
9. The novel solidified silt subgrade road extension and splicing method according to claim 8, characterized in that the semi-flexible silt subgrade material is prepared by the following steps:
taking silty soil as a raw material, blending with a flexible curing agent, and mixing to obtain dry powder; wherein the dry powder comprises the following components in percentage by mass: silty soil: flexible curing agent = 90: 10;
mixing the dry powder with water, compacting and curing to prepare a semi-flexible silt roadbed material; wherein the mass ratio of the dry powder to the water is 1: 0.11;
the cohesive force of the cured semi-flexible silt subgrade material is more than 350kPa, and the compressive strength is more than 1.5 MPa.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106939541A (en) * | 2017-05-09 | 2017-07-11 | 交通运输部公路科学研究所 | A kind of semi-rigid semi-flexible Widening of Freeway pavement structure and method |
| RU2016105404A (en) * | 2016-02-17 | 2017-08-22 | Николай Васильевич Меркушов | METHOD FOR EXPANDING THE ROAD DESIGN |
| CN109295822A (en) * | 2018-10-08 | 2019-02-01 | 武钦培 | A kind of expressway widening road structure and its construction method |
| CN110342868A (en) * | 2019-06-19 | 2019-10-18 | 山东省交通科学研究院 | A kind of slity soil pavement material semi-flexible and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2016105404A (en) * | 2016-02-17 | 2017-08-22 | Николай Васильевич Меркушов | METHOD FOR EXPANDING THE ROAD DESIGN |
| CN106939541A (en) * | 2017-05-09 | 2017-07-11 | 交通运输部公路科学研究所 | A kind of semi-rigid semi-flexible Widening of Freeway pavement structure and method |
| CN109295822A (en) * | 2018-10-08 | 2019-02-01 | 武钦培 | A kind of expressway widening road structure and its construction method |
| CN110342868A (en) * | 2019-06-19 | 2019-10-18 | 山东省交通科学研究院 | A kind of slity soil pavement material semi-flexible and preparation method thereof |
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