CN113201987B - Roadbed base of high liquid limit clay ground and construction method thereof - Google Patents
Roadbed base of high liquid limit clay ground and construction method thereof Download PDFInfo
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- CN113201987B CN113201987B CN202110500502.0A CN202110500502A CN113201987B CN 113201987 B CN113201987 B CN 113201987B CN 202110500502 A CN202110500502 A CN 202110500502A CN 113201987 B CN113201987 B CN 113201987B
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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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- 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
Abstract
The invention relates to a roadbed base of a high liquid limit clay ground and a construction method, wherein the roadbed base comprises a gravel layer and a composite cement soil layer, the gravel layer is laid on the high liquid limit clay ground, and the composite cement soil layer is laid on the gravel layer; the gravel layer is mainly formed by gravel; the composite cement soil layer is mainly composed of a mixture of high liquid limit clay and cement. The roadbed base is designed to enable the compaction degree to reach more than 90%, meet construction requirements and avoid elastic soil, and can block capillary water in ground natural high liquid limit clay from rising, so that the roadbed base is more stable and is not affected by the ground environment, and the service life of a road is prolonged. The construction method provided by the invention is simple to operate, and the method of constructing the half-frame first and then constructing the other half-frame can effectively avoid the transportation of earthwork, reduce the occupation of a field, shorten the construction period, improve the construction efficiency and facilitate the popularization.
Description
Technical Field
The invention relates to the technical field of construction of high liquid limit clay, in particular to a roadbed base of a high liquid limit clay ground and a construction method thereof.
Background
Modern highway construction engineering has higher requirements on the foundation to meet driving safety and comfort, and the principle of 'safety, applicability, economy, reasonableness and easy operation' should be followed when special foundations are treated. The high liquid limit clay is common special soil, is fine soil with the liquid limit of more than 50 percent, has overlarge natural water content, is directly used as a roadbed base in the construction process, and has the compaction degree which is difficult to reach the target, and can cause the shearing damage inside the soil body after being compacted for many times, so that 'elastic soil' is generated. In actual engineering, if the foundation of an undisturbed soil subgrade is not treated or treated improperly, the foundation is unstable, and the settlement of the road subgrade is excessive or uneven.
Therefore, before roadbed filling is carried out in the soil environment such as high liquid limit clay, effective treatment needs to be carried out on a roadbed substrate, the roadbed substrate of the high liquid limit clay ground with the compactness meeting the requirement is provided, and the roadbed substrate is necessary for avoiding the occurrence of roadbed subsidence and uneven settlement after completion and prolonging the service life of a road.
Disclosure of Invention
The invention aims to: the roadbed base is designed to enable the compactness to reach more than 90%, meet construction requirements and avoid the occurrence of elastic soil, and can block the rise of capillary water in natural high liquid limit clay on the ground, so that the roadbed base is more stable and is not influenced by the ground environment, and the service life of a road is prolonged.
In order to achieve the purpose, the invention adopts the technical scheme that:
a roadbed base of a high liquid limit clay ground comprises a gravel layer and a composite cement soil layer, wherein the gravel layer is laid on the high liquid limit clay ground, and the composite cement soil layer is laid on the gravel layer; the gravel layer is mainly formed by gravel; the composite cement soil layer is mainly composed of a mixed material of high liquid limit clay and cement.
The roadbed substrate of the high liquid limit clay ground provided by the invention mainly comprises two layers, wherein the lower layer is a gravel layer, and the upper layer is a composite cement soil layer. The composite cement soil layer is formed by adding a proper amount of cement into original soil, so that the physical properties of the original soil are effectively changed, the water content is reduced, the phenomena of elastic soil and slurry turning are avoided, the strength of a base can be effectively improved due to a hardened surface formed after the cement is solidified, the composite cement soil layer can effectively block the rising of capillary water, and the phenomenon of slurry turning in roadbed filling on the base to influence the filling quality is avoided. The gravel layer can provide a lower bearing layer with certain specific rigidity for the upper layer, and the compaction effect of the roadbed base can be effectively improved. Through the mutual cooperation of the gravel layer and the composite cement soil layer, the roadbed base obtains a good effect, the compactness can reach more than 90%, the construction requirement is met, the elastic soil is avoided, the roadbed base can block the rise of capillary water in the natural high liquid limit clay on the ground, the roadbed base is more stable and is not influenced by the ground environment, and the service life of a road is prolonged.
Further, the high liquid limit clay ground refers to a natural ground of high liquid limit clay. Preferably, the high liquid limit clay ground is a natural ground of high liquid limit clay subjected to grooving and leveling.
Further, the roadbed basement of the high liquid limit clay ground has a compactness of 90% or more, preferably 93% or more.
Furthermore, the thickness of the gravel layer is 18 cm-25 cm. The large number of experiments of the inventor prove that the thickness of the gravel layer is very important for the construction effect of the roadbed base, if the thick bottom is too small, the phenomenon of ground spring soil is easily reflected to the gravel layer in the rolling process, a lower bearing layer with good rigidity cannot be provided for the composite cement soil layer, and if the thickness is too large, strict requirements on the tonnage of the road roller and the rolling times are met, so that the rolling efficiency is reduced.
Further, in the gravel layer, the grain size of the gravel is not more than 10 cm. Through a large amount of experimental researches of the inventor, if the particle size of gravel is too large, a large amount of holes can appear, and the gravel is too loose in the rolling process and cannot play a good bottoming role. Preferably, in the gravel layer, the grain size of the gravel is 2 cm-8 cm. More preferably, in the gravel layer, the grain size of the gravel is 4cm to 8 cm.
Further, the thickness of the composite cement soil layer is more than 15 cm. The study finds that if the thickness of the composite cement soil layer is too low, the composite cement soil layer is scattered and is difficult to compact. Preferably, the thickness of the composite cement soil layer is 15 cm-24 cm. More preferably, the thickness of the composite cement soil layer is 19 cm-21 cm.
Furthermore, the composite cement soil layer is mainly formed by paving materials mixed by high liquid limit clay with the water content of 12-15 wt% and cement. A large amount of experimental researches of the inventor show that the water content of the high liquid limit clay in the composite cemented soil layer is very important for the compaction effect, if the water content is too low, the soil layer is loosened and is difficult to compact, if the water content is too high, the 'elastic soil' phenomenon is easy to occur, and the compaction degree is difficult to meet the requirements. Preferably, the composite cement soil layer is mainly formed by paving a material formed by mixing high liquid limit clay with the water content of 12-13 wt% and cement.
Furthermore, the high liquid limit clay in the composite cement soil layer is obtained by airing natural high liquid limit clay. Further, the natural water content of the natural high liquid limit clay is 23.8-30.6 wt%.
Furthermore, in the composite cement soil layer, the doping amount of the cement is 4-6% of the total mass of the mixed material. The inventor tests and discovers that when the cement doping amount is too small, the surface strength of the composite cement soil layer is reduced, cracks are easy to appear, the foundation is broken, and the quality of the highway in the later period is influenced. When the amount of cement added is too large, the cost is too high and the economical efficiency is poor. Preferably, in the composite cement soil layer, the doping amount of the cement is 4-5% of the total mass of the mixed material.
Further, in the composite cement soil layer, the cement is ordinary Portland No. 42.5 cement, and the 7-day unconfined compressive strength of the mixed cement soil is not lower than 800 KPa. Research finds that when the strength of cement is too low, the composite cement soil layer is easy to crack, so that the quality of the composite cement soil layer does not reach the standard, and the later roadbed is affected. Preferably, in the composite cement soil layer, the unconfined 90-day compressive strength of the cement soil is more than 2500 KPa.
The invention also aims to provide a construction method of the roadbed base of the high liquid limit clay ground.
A construction method of a roadbed base of a high liquid limit clay ground comprises the following steps:
step 1, cleaning and leveling the ground surface, then digging a base groove downwards on the ground surface, flattening the bottom of the base groove, and airing the dug high liquid limit clay;
and 3, paving the high liquid limit clay aired in the step 1 on the gravel layer obtained in the step 2, mixing the high liquid limit clay with cement by using a road mixer, and then performing second rolling treatment to complete the construction of the roadbed base of the high liquid limit clay ground.
The construction method provided by the invention is simple to operate, short in construction period and convenient to popularize.
Further, in the step 1, when the foundation trench is excavated downwards from the ground surface, half-width excavation is performed first, the half-width excavated high liquid limit clay is placed on the other half-width ground surface for airing, and after the excavated half-width foundation is completed, the other half-width foundation is constructed by the same method. By the method of constructing one half of the frame first and then constructing the other half of the frame, the transportation of earthwork can be effectively avoided, the occupation of a field is reduced, the construction period is shortened, and the construction efficiency is improved.
Further, in the step 2, a road roller of 20t to 22t is used for operation in the first rolling treatment process.
Further, in the step 2, the peak staggering compaction is carried out for 6-7 times in the first rolling process until the sedimentation difference is not more than 2 mm.
Further, in the step 3, the water content of the air-dried high liquid limit clay is 12wt% -15 wt%. Preferably, in the step 3, the water content of the air-cured high liquid limit clay is 12wt% to 13 wt%.
Further, in the step 3, a road roller of 20t to 22t is used for operation in the second rolling treatment process.
Further, in the step 3, the second rolling process is carried out for 6-7 times of peak staggering compaction. Preferably, in the step 3, the second rolling process comprises 6-7 times of peak staggering compaction, 4 times of strong compaction and 2-3 times of weak compaction.
Further, in the step 3, after the second rolling treatment, the compaction degree of the roadbed base reaches more than 90%.
Further, in the step 3, after the second rolling treatment is completed, the surface layer of the composite cement soil layer is subjected to watering maintenance treatment. Further, the watering and curing time is 7 days.
And further, carrying out layered filling on the roadbed on the composite cement soil layer 7 days after watering maintenance.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the roadbed substrate of the high liquid limit clay ground provided by the invention mainly comprises two layers, wherein the lower layer is a gravel layer, and the upper layer is a composite cement soil layer. The composite cement soil layer is formed by adding a proper amount of cement into original soil, so that the physical properties of the original soil are effectively changed, the water content is reduced, the phenomenon of elastic soil is avoided, and meanwhile, the strength of the soil can be effectively improved due to a hardened surface formed after the cement is solidified. The gravel layer can provide a lower bearing layer with certain specific rigidity for the upper layer, the compaction effect of the roadbed base can be effectively improved, and meanwhile, the gravel layer also has the function of blocking capillary water from rising structurally. Through the mutual cooperation of the gravel layer and the composite cement soil layer, the roadbed base obtains a good effect, the compactness can reach more than 90%, the construction requirement is met, the elastic soil is avoided, the roadbed base can block the rise of capillary water in the natural high liquid limit clay on the ground, the roadbed base is more stable and is not influenced by the ground environment, and the service life of a road is prolonged.
2. The construction method provided by the invention is simple to operate, and the method of constructing the half frame first and then constructing the other half frame can effectively avoid the transportation of earthwork, reduce the occupation of a field, shorten the construction period, improve the construction efficiency and facilitate the popularization.
Drawings
Fig. 1 is a schematic view of the subgrade base structure of the high liquid limit clay ground of the present invention.
Icon: 1-a gravel layer; 2-composite cement soil layer; 3-high liquid limit clay ground; 4-earth surface; 5-a base tank; 6-roadbed.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
In a certain highway foundation treatment project, the yellow river alluvial plains are located, most of the projects are basic farmlands, and the construction of expressway is short of soil resources. High liquid limit clay is distributed on the pile number K63+ 260-K63 +780 segments, the total distance is 520m, the site is originally a farmland, the terrain is flat, and the underground water level of the road segment is shallow (0.7 m below the ground). The site laboratory performs a basic soil test on the soil layer, and the results are shown in table 1.
Table 1 high liquid limit clay soil engineering test results
The results of the soil tests show that: the liquid limit, plasticity index and water content of the soil body are all very high. The soil has the property similar to expansive soil, has large strength reduction after meeting water, and needs to be effectively treated when being used as a roadbed substrate of the expressway.
As shown in fig. 1, a roadbed substrate comprises a 20cm gravel layer 1 and a 20cm composite cement layer 2, wherein the gravel layer 1 is laid on a high liquid limit clay ground 3, and the composite cement layer 2 is laid on the gravel layer 1; the gravel layer 1 is mainly composed of gravel with the maximum grain size of 8cm +/-1 cm; the composite cement soil layer 2 is mainly composed of a mixed material of high liquid limit clay and cement, the water content of the high liquid limit clay in the composite cement soil layer 2 is 12%, the mass of the cement is 4% of the total mass of the mixed material, and the cement is ordinary portland cement with the number of 42.5.
The specific construction process is as follows:
step 1, cleaning and leveling a ground surface 4, firstly, downwards excavating a 20cm foundation trench 5 on a half width of the ground surface, and placing the high liquid limit clay excavated on the other half width of the ground surface for airing;
and 3, mixing the high liquid limit clay with the water content of 12% and cement after airing in the step 1, paving the mixed material on the gravel layer 1 obtained in the step 2, then carrying out second rolling treatment, carrying out peak staggering and strong pressing for 4 times and weak pressing for 2 times by using a 22t road roller, and detecting that the compaction degree reaches 92.5% and the elastic soil phenomenon does not occur.
And 4, excavating the other half of ground surface foundation trench 5, airing the excavated high liquid limit clay on the other side, constructing by adopting the same method, and finally obtaining a roadbed base and performing watering maintenance on the roadbed base.
And flattening the roadbed base after seven-day maintenance by using a road roller, and filling the roadbed 6 in the next step.
Example 2
A roadbed substrate, comprising a 18cm gravel layer 1 and a 15cm composite cement soil layer 2, wherein the gravel layer 1 is laid on a high liquid limit clay ground 3, and the composite cement soil layer 2 is laid on the gravel layer 1; the gravel layer 1 is mainly composed of gravel with the maximum grain size of 6cm +/-1 cm; the composite cement soil layer 2 is mainly composed of a mixed material of high liquid limit clay and cement, the water content of the high liquid limit clay in the composite cement soil layer 2 is 12.5%, the mass of the cement is 5% of the total mass of the mixed material, and the cement is ordinary portland cement with the reference number of 42.5.
The specific experimental process is as follows:
step 1, cleaning and leveling a ground surface 4, excavating a 18cm foundation trench 5 downwards on the ground surface, and airing excavated high liquid limit clay;
and 3, mixing the high liquid limit clay with the water content of 12.5% and cement after airing in the step 1, paving the mixed material on the gravel layer 1 obtained in the step 2, carrying out second rolling treatment, carrying out peak staggering and strong pressing for 4 times and weak pressing for 2 times by using a 22t road roller, detecting that the compaction degree reaches 91%, and carrying out watering maintenance on the soil without the elastic soil phenomenon.
And flattening the roadbed substrate after seven-day maintenance by using a road roller, wherein the surface of the composite cement soil layer 2 is smooth and complete.
Example 3
A subgrade base comprising a 25cm gravel layer 1 and a 24cm composite cement layer 2, said gravel layer 1 being laid on a high liquid limit clay ground 3, said composite cement layer 2 being laid on said gravel layer 1; the gravel layer 1 is mainly composed of gravel with the maximum grain size of 4cm +/-1 cm; the composite cement soil layer 2 is mainly composed of a mixed material of high liquid limit clay and cement, the water content of the high liquid limit clay in the composite cement soil layer 2 is 13.5%, the mass of the cement is 6% of the total mass of the mixed material, and the cement is ordinary portland cement with the number of 42.5.
The specific experimental process is as follows:
step 1, cleaning and leveling a ground surface 4, excavating a 25cm foundation trench 5 downwards from the ground surface, and airing excavated high liquid limit clay;
and 3, mixing the high liquid limit clay with the water content of 13.5% and cement after airing in the step 1, paving the mixed material on the gravel layer 1 obtained in the step 2, then carrying out second rolling treatment, carrying out peak staggering and strong pressing for 4 times and weak pressing for 2 times by using a 22t road roller, detecting that the compaction degree reaches 90.5%, and carrying out watering maintenance on the soil without the elastic soil phenomenon.
And flattening the roadbed substrate after seven-day maintenance by using a road roller, wherein the surface of the composite cement soil layer 2 is smooth and complete.
Comparative example 1
The subgrade base provided in comparative example 1 was a 40cm composite soil cement layer 2, single layer, without gravel layer 1. The water content of the high liquid limit clay in the composite cement soil layer 2 is 12 percent, the mass of the cement is 4 percent of the total mass of the mixed materials, and the cement is ordinary portland cement with the number of 42.5.
Cleaning and leveling the earth surface 4, paving the mixed material on the earth surface 4, and performing peak staggering and strong compaction for 4 times and weak compaction for 2 times by using a 22t road roller, wherein the compaction degree is up to 85% through detection, and the elastic soil phenomenon occurs.
The high liquid limit soil layer is thicker, the ash doping treatment is carried out for 40cm, a soft layer is still arranged below the high liquid limit soil layer, and the common spring soil is formed along with the increase of compaction work.
Comparative example 2
The roadbed foundation structure provided in comparative example 2 is the same as that of example 1, except that the thickness of the composite cement soil layer 2 of comparative example 2 is 12cm, and the raw materials and thickness of the gravel layer 1 and the raw materials of the composite cement soil layer 2 are completely the same as those of example 1, and the construction is performed in the same manner as in example 1.
Researches find that when the thickness of the composite cement soil layer is 12cm, the composite cement soil layer is difficult to compact due to the phenomenon of pressure dispersion, and the effective construction quality cannot be guaranteed.
Comparative example 3
The roadbed foundation structure provided by the comparative example 3 is the same as that of the example 1, except that the doping amount of the cement in the composite cement soil layer 2 of the comparative example 3 is 3% of the total amount of the mixed materials, the raw materials and the thickness of the gravel layer 1 and the thickness of the composite cement soil layer 2 are completely the same as those of the example 1, and the construction is carried out in the same manner as the example 1.
Researches find that the roadbed base after seven-day maintenance is flattened by a road roller, so that more cracks appear on the surface of the composite cement soil layer 2, the quality is unqualified, the later-stage lower-layer moisture rises, and the roadbed is affected.
Comparative example 4
Comparative example 4 a gravel layer was prepared using the same gravel as in example 1, the thickness of the gravel layer was set to 15cm, and it was found that, during the rolling, the ground spring soil phenomenon was reflected to the gravel layer and could not be compacted due to the excessively small thickness of the gravel layer, thereby providing a good lower bearing layer for the composite cemented soil layer.
Examples 4 to 6 and comparative examples 5 to 6
Examples 4 to 6 and comparative examples 5 to 6 were conducted to investigate the influence of the water content of the high liquid limit clay in the composite cemented soil layer on the compaction effect, and examples 4 to 6 and comparative examples 5 to 6 provided roadbed base structures identical to example 1 except that the water content of the high liquid limit clay after air-curing in the composite cemented soil layer changed in examples 4 to 6 and comparative examples 5 to 6 was completely the same as example 1 in terms of the material and thickness of the gravel layer and the thickness of the composite cemented soil layer, and construction was conducted in the same manner as in example 1. The water content and the degree of compaction of the high liquid limit clay are shown in Table 2.
Table 2 results of the research tests
A large number of experimental researches of the inventor show that the water content of high liquid limit clay in the composite cemented soil layer has very important influence on the final compaction condition, if the water content is too low, the soil layer is loosened and is difficult to compact, if the water content is too high, the phenomenon of 'elastic soil' is easy to occur, and the compaction degree is difficult to meet the requirement. Preferably, in the composite cement soil layer, the water content of the high liquid limit clay is 12-13%. The compactness can reach more than 93 percent, and the effect is good.
The roadbed substrate of the high liquid limit clay ground provided by the invention mainly comprises two layers, wherein the lower layer is a gravel layer, and the upper layer is a composite cement soil layer. Through the mutual cooperation of the gravel layer and the composite cement soil layer, the roadbed base obtains a good effect, the compactness can reach more than 90%, the construction requirement is met, the elastic soil is avoided, the roadbed base can block the rise of capillary water in the natural high liquid limit clay on the ground, the roadbed base is more stable and is not influenced by the ground environment, and the service life of a road is prolonged.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A roadbed substrate of a high liquid limit clay ground is characterized by consisting of a gravel layer (1) and a composite cement soil layer (2), wherein the gravel layer (1) is laid on the high liquid limit clay ground (3), and the composite cement soil layer (2) is laid on the gravel layer (1); the gravel layer (1) is mainly composed of gravel; the composite cement soil layer (2) is mainly composed of a mixture of high liquid limit clay with the water content of 12-15 wt% and cement; the thickness of the gravel layer (1) is 18-25 cm; the doping amount of the cement is 4-6% of the total mass of the mixed materials; the thickness of the composite cement soil layer (2) is 15-24 cm.
2. The subgrade base of the high liquid limit clay ground according to claim 1, characterized in that the composite cemented soil layer is mainly paved by materials mixed by the high liquid limit clay with the water content of 12-13 wt% and cement.
3. The subgrade base of the high liquid limit clay ground according to the claim 1, characterized in that the doping amount of the cement in the composite cement soil layer (2) is 4-5% of the total mass of the mixed materials.
4. The subgrade base of a high liquid limit clay ground according to claim 1, characterized in that the thickness of said composite cement layer (2) is 19-21 cm.
5. The subgrade base of a high liquid limit clay ground according to any one of claims 1-4, characterized in that the grit in the gravel layer (1) has a particle size of not more than 10 cm.
6. A construction method of a roadbed foundation for a high liquid limit clay ground as claimed in any one of claims 1 to 5, comprising the steps of: step 1, cleaning and leveling a ground surface (4), digging a base groove (5) downwards on the ground surface (4), flattening the bottom of the base groove (5), and airing dug high liquid limit clay;
step 2, paving gravel in the foundation trench (5) excavated in the step 1, performing first rolling treatment, and leveling and collecting the surface;
and 3, paving the high liquid limit clay aired in the step 1 on the gravel layer (1) obtained in the step 2, mixing the gravel layer and cement by using a road mixer, and then performing second rolling treatment to complete construction of the roadbed base of the high liquid limit clay ground.
7. The method for constructing the roadbed base of the high liquid limit clay ground according to claim 6, wherein in the step 1, when the ground surface (4) is excavated downwards to form the foundation trench (5), half-width excavation is firstly carried out, the half-width excavated high liquid limit clay is placed on the other half-width ground surface to be aired, and after the excavated half-width roadbed base is completed, the other half-width construction is carried out by the same method.
8. The method for constructing a roadbed base for a high liquid limit clay ground according to claim 6, wherein in the step 3, after the second rolling process is completed, the surface layer of the composite cemented soil layer (2) is subjected to a watering curing process.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3500728A (en) * | 1966-11-08 | 1970-03-17 | Battelle Development Corp | Concrete construction and roadways |
| CN101255040A (en) * | 2008-04-08 | 2008-09-03 | 昆明理工大学 | Method for preparing regenerative road material by using waste building material and construction method thereof |
| CN102747662A (en) * | 2012-07-18 | 2012-10-24 | 上海城建市政工程（集团）有限公司 | Construction method for sand-filling subgrade |
| CN104631254A (en) * | 2014-12-26 | 2015-05-20 | 石家庄铁道大学 | Construction method of geogrid reinforced clay edge-covered tailing subgrade |
| CN109629362A (en) * | 2019-01-29 | 2019-04-16 | 中交航局第三工程有限公司 | A kind of high liquid limit soil reinforcement roadbed filling structure and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3500728A (en) * | 1966-11-08 | 1970-03-17 | Battelle Development Corp | Concrete construction and roadways |
| CN101255040A (en) * | 2008-04-08 | 2008-09-03 | 昆明理工大学 | Method for preparing regenerative road material by using waste building material and construction method thereof |
| CN102747662A (en) * | 2012-07-18 | 2012-10-24 | 上海城建市政工程（集团）有限公司 | Construction method for sand-filling subgrade |
| CN104631254A (en) * | 2014-12-26 | 2015-05-20 | 石家庄铁道大学 | Construction method of geogrid reinforced clay edge-covered tailing subgrade |
| CN109629362A (en) * | 2019-01-29 | 2019-04-16 | 中交航局第三工程有限公司 | A kind of high liquid limit soil reinforcement roadbed filling structure and method |
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