CN115058931A - Soil roadbed filling construction method - Google Patents
Soil roadbed filling construction method Download PDFInfo
- Publication number
- CN115058931A CN115058931A CN202210775455.5A CN202210775455A CN115058931A CN 115058931 A CN115058931 A CN 115058931A CN 202210775455 A CN202210775455 A CN 202210775455A CN 115058931 A CN115058931 A CN 115058931A
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- China
- Prior art keywords
- soil
- construction method
- filling construction
- crushing
- roadbed filling
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Links
- 239000002689 soil Substances 0.000 title claims abstract description 71
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 239000011435 rock Substances 0.000 claims abstract description 49
- 238000002156 mixing Methods 0.000 claims abstract description 37
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004064 recycling Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000012634 fragment Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 239000011440 grout Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- 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
Abstract
The application relates to the technical field of roadbed construction, and the soil roadbed filling construction method is applicable to strongly weathered tuff and at least comprises the following steps: taking blocky strongly weathered tuff; after the materials are paved to the first thickness, rolling for the first time; mixing and crushing for the first time by using a pavement cold recycling machine, and standing a soil body to volatilize water in rock fragments; paving the sandy soil with low water content to a second thickness, and then performing secondary mixing and crushing by using a pavement cold recycling machine; forming a roadbed after tamping. The soil roadbed filling construction method can improve construction quality and save resources.
Description
Technical Field
The application relates to the technical field of roadbed construction, in particular to a soil roadbed filling construction method.
Background
In roadbed filling construction, soil with poor soil indexes or soil not meeting roadbed filling requirements is often recycled by physical or chemical improvement methods, and the improvement methods generally comprise airing and mixing cement, lime or two-ash soil. When the blending improvement is adopted, the blending is generally firstly paved and rolled, the mixture is mixed with ash after primary leveling, and then the blending and rolling are carried out again, and finally the forming is carried out. The above-described improvement methods have the following problems:
(1) for airing, a conventional crusher is usually adopted to crush some rock masses with super-grain diameters into particles meeting the grain diameter requirement, then the particles are blended and then used for filling the soil subgrade, and when the crushing and blending cost is more than that of earth filling, the massive rock masses are generally treated by abandoning. When the soil body which is not suitable for filling the soil subgrade is aired, if the soil body is limited by weather conditions, such as coastal provinces and cities like Hainan, the rainy season is long, and heavy rain is caused, so that the soil body is not suitable for airing large-volume earthwork.
However, the crushing efficiency of the air cannon is low, the particle size is difficult to control, and the cost and the construction period are affected. If the treatment of abandoning the side is carried out, the resource waste is large, and the concept of environmental protection and energy saving is not met.
(2) For the blending of cement, lime or two-ash soil, i.e. the blending treatment, the blending proportion is generally controlled at 4%, which is easy to cause larger pollution, and the blending cost is larger when the volume of earth is larger.
Therefore, the cost of the existing roadbed filling construction is difficult to reduce, and the concept of environmental protection and energy conservation is not met.
Disclosure of Invention
The application provides a soil roadbed filling construction method, which aims to solve the problems that the cost of the existing roadbed filling construction is difficult to reduce and the environment-friendly and energy-saving concept is not met.
The application provides a soil roadbed filling construction method, which is suitable for strongly weathered tuff and at least comprises the following steps:
taking blocky strongly weathered tuff;
after the materials are paved to the first thickness, rolling for the first time;
mixing and crushing for the first time by using a pavement cold recycling machine, and standing a soil body to volatilize water in rock fragments;
paving the sandy soil with low water content to a second thickness, and then performing secondary mixing and crushing by using a pavement cold recycling machine;
forming a roadbed after tamping.
In an alternative embodiment, the step of performing a first rolling comprises:
leveling the high-rise points of the rock mass paved on the roadbed for the first time by using the excavator, and rolling the rock mass at least twice back and forth.
In an alternative embodiment, the step of performing the first mixing and crushing by using a cold road regenerator includes:
and mixing and crushing the rolled rock mass to a fluffy crushed rock mass.
In an alternative embodiment, before the step of taking the sandy soil with low water content to pave to the second thickness, the method further comprises the following steps:
and leveling the broken rock mass for the second time by using a land leveler.
In an optional embodiment, after the step of performing the second mixing and crushing by using the pavement cold recycling machine, the method further comprises the following steps:
and leveling for the third time by using a land leveler.
In an alternative embodiment, said compacting after forming a subgrade comprises:
and carrying out secondary rolling on the rock mass after the secondary mixing and crushing to form the roadbed.
In an alternative embodiment, after the second pass, the subgrade is sprayed with a low dose grout seal.
In an alternative embodiment, the low moisture sandy soil has a volume ratio of rock block to sandy soil in the range of 3.5: 1-5: 1.
In an alternative embodiment, the first thickness ranges between 15-25 cm.
In an alternative embodiment, the second thickness ranges between 4-6 cm.
The application provides a soil roadbed filling construction method, its beneficial effect is:
the application provides a soil subgrade filling construction method, introduces the subgrade filling construction with this a road surface cold recycling machine for road surface construction, can broken rock mass, carries out rapid diffusion moisture to broken rock mass, reaches the purpose that reduces the water content. Meanwhile, according to the final water content of the rock mass and requirements on construction period and efficacy, sandy soil with low water content can be mixed, and the compaction degree of the roadbed is improved by reducing the particle size of the strongly weathered tuff.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice.
Drawings
The foregoing and/or additional aspects and advantages will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a soil roadbed filling construction method according to an embodiment of the application;
fig. 2 is a schematic view of a layered structure of a soil roadbed according to an embodiment of the present application.
Detailed Description
The present application is further described with reference to the following drawings and exemplary embodiments, wherein like reference numerals are used to refer to like elements throughout. In addition, if a detailed description of the known art is not necessary to show the features of the present application, it is omitted.
Aiming at the existing roadbed construction method, the construction steps of airing and mixing cement, lime or two-ash soil on soil with poor soil indexes or other soil not meeting the roadbed filling requirements, then improving the soil quality by adopting a mixing mode, leveling, mixing with lime, leveling again, rolling and finally forming are generally carried out. However, the strongly weathered blocky tuff adopted in the existing construction method has the characteristics of high natural water content, super-grain size, easy softening in water, easy air drying to form ash in wind, loss of cohesiveness and the occlusal force among particles, extremely sensitivity to environmental factors such as wind, water, air humidity and the like, loss of occlusal force and cohesiveness and the like, so that the strongly weathered blocky tuff is not easy to be used for filling construction of soil subgrade, is usually treated as a abandoning method, thereby causing material waste and difficult control of construction cost.
Referring to fig. 1-2, fig. 1 is a schematic flow chart of a filling construction method for an earth roadbed according to an embodiment of the present application, and fig. 2 is a schematic layered structure of the earth roadbed according to the embodiment of the present application.
In order to solve the problems, the application provides a soil roadbed filling construction method. The method is suitable for strongly weathered tuff, and at least comprises the following steps:
s110, taking blocky strongly weathered tuff;
s120, after the materials are paved to the first thickness, rolling for the first time;
s130, mixing and crushing for the first time by using a pavement cold recycling machine, and standing a soil body to volatilize water in rock fragments;
s140, taking low-water-content sandy soil, paving the low-water-content sandy soil to a second thickness, and performing secondary mixing and crushing by using a pavement cold recycling machine;
and S150, forming a roadbed after tamping.
In the above steps S110 to S150, before the filling construction of the soil roadbed, the roadbed base is firstly leveled. After the subgrade base is leveled, the detected and qualified strongly weathered tuff in the form of blocks is taken out, and the size of the rock mass is about 20 × 15(cm) in the embodiment.
Paving the blocky strongly weathered tuff on the roadbed base until the paved thickness reaches a set first thickness d1, and carrying out primary rolling on the strongly weathered tuff so as to improve the compaction degree of the paved strongly weathered tuff. The first thickness is within the range of 15-25cm, so that the difficulty of construction of the rock body which is not leveled cannot be increased due to serious dislocation.
And after the first rolling is finished, mixing and crushing for the first time by using a pavement cold recycling machine. Specifically, the milling and mixing tool bit of the pavement cold recycling machine is utilized to crush the rock until the original blocky strongly weathered tuff is converted into a crushed rock. And suspending construction to keep the soil body still, and volatilizing the total moisture of the broken rock mass by using the natural conditions of solarization or breeze, so as to avoid the influence of the moisture in the roadbed on the construction quality. In this embodiment, the standing time of the soil body can be controlled to be 1-2 hours.
And after the soil body standing process is finished, taking low-water-content sandy soil. And continuously overlaying and paving the low-water-content sandy soil on the crushed rock mass subjected to the primary mixing and crushing. When the paving thickness reaches the set second thickness d2, the pavement cold recycling machine is utilized to mix and crush for the second time, and specifically, the milling and mixing cutter head of the pavement cold recycling machine is used for mixing sandy soil and rock mass. Wherein, the volume ratio of the low water content sandy soil is within the range of 3.5: 1-5: 1, in the present embodiment, the volume ratio may be 4: 1. the second thickness may range between 4 and 6cm, and in this embodiment, the second thickness may be 5 cm.
Based on the operation of the step S140, the particle size of the strongly weathered tuff can be reduced, which is helpful for improving the mixing degree of the strongly weathered tuff and the low-water-content sandy soil.
The application provides a soil subgrade filling construction method, introduces the subgrade filling construction with this a road surface cold recycling machine for road surface construction, can broken rock mass, carries out rapid diffusion moisture to broken rock mass, reaches the purpose that reduces the water content. Meanwhile, according to the final water content of the rock mass and requirements on construction period and efficacy, sandy soil with low water content can be mixed, and the compaction degree of the roadbed is improved by reducing the particle size of the strongly weathered tuff.
The step of performing the first rolling in step S120 includes: leveling the high-rise points of the rock mass paved on the roadbed for the first time by using the excavator, and rolling the rock mass at least twice back and forth.
In the paved strongly weathered tuff with the first thickness in a blocky shape, the dimension of each rock body is different, so that larger gaps can exist among the rock bodies in a stacking or accumulation mode. Aiming at the gap, in the embodiment, a bucket of the excavator is used for leveling the high-rise points of the rock mass for the first time, and then a road roller is used for rolling back and forth on the massive strongly weathered tuff, so that the gap between the paved rock masses is further reduced. In this embodiment, the first pass may be performed by rolling the paved, highly weathered tuff back and forth at least two times using the rollers of the roller.
On the basis of the rolling in step S120, in the first mixing and crushing process in step S130, the paved strongly weathered tuff is mixed and crushed into a fluffy shape, so that the crushed rock can better volatilize water, and the standing and volatilizing time is shortened.
When the standing time reaches the preset time, or after the air-dry degree of the rock mass reaches the requirement, the leveling machine is used for leveling the broken rock mass for the rock mass subjected to standing volatile moisture is originally fluffy, uneven and flat, so that the surface of the rock mass is leveled, and a relatively flat base is provided for the continuous paving in the step S140.
After the second mixing and crushing process of step S140, the grader is used again to perform third leveling. And carrying out secondary rolling on the third leveled rock mass to form the roadbed.
After the roadbed is formed, spreading low-dose cement slurry to the rolled roadbed so as to form a sealing layer, so as to prevent the rock mass and sandy soil from dispersing into ash and losing cohesiveness and occlusal force due to wind; and moreover, material waste caused by the loss of discrete goods can be avoided, so that the soil subgrade filling construction process can be ensured to accord with the environmental protection and energy saving concept.
Further, after the roadbed is formed, in the case that the subsequent continuous construction can not be carried out and the standing time is long, low-dose cement slurry is spread on the rolled roadbed to form a sealing layer, so that the roadbed is prevented from dispersing rock mass and sandy soil into ash due to wind and polluting the surrounding environment.
The modulation range for the low dose cement slurry in this embodiment is: the range of the cement consumption per 10000 square meter roadbed is 1100-1300 kg.
According to the soil subgrade filling construction method, the processes of leveling by using the excavator, preliminary rolling by using the road roller and mixing and crushing by using the road surface cold recycling machine are utilized, and rock masses with super-grain diameters are paved on the subgrade to be crushed into particles meeting the requirement of the grain diameters, so that the quantity of the abandoned rock masses is greatly reduced. In addition, the scheme is also suitable for the areas which are not suitable for airing the earthwork with large volume due to long rainy season and more rainstorm, thereby greatly improving the construction quality of filling the soil subgrade in the areas and reducing the condition of resource waste caused by the erosion of the rainwater to the soil.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A soil roadbed filling construction method is suitable for strongly weathered tuff, and is characterized by at least comprising the following steps:
taking blocky strongly weathered tuff;
after the materials are paved to the first thickness, rolling for the first time;
mixing and crushing for the first time by using a pavement cold recycling machine, and standing a soil body to volatilize water in rock fragments;
paving the sandy soil with low water content to a second thickness, and then performing secondary mixing and crushing by using a pavement cold recycling machine;
forming a roadbed after tamping.
2. The soil roadbed filling construction method according to claim 1, wherein:
the step of performing the first rolling comprises:
leveling the high-rise points of the rock mass paved on the roadbed for the first time by using the excavator, and rolling the rock mass at least twice back and forth.
3. The soil roadbed filling construction method according to claim 2, wherein:
the step of mixing and crushing for the first time by utilizing the pavement cold recycling machine comprises the following steps of:
and mixing and crushing the rolled rock mass to a fluffy crushed rock mass.
4. A soil roadbed filling construction method according to claim 3, wherein:
before the step of taking low water content sandy soil to pave to the second thickness, still include:
and leveling the broken rock mass for the second time by using a land leveler.
5. The soil roadbed filling construction method according to claim 4, wherein:
after the step of mixing and crushing for the second time by using the pavement cold recycling machine, the method further comprises the following steps of:
and leveling for the third time by using a land leveler.
6. The soil roadbed filling construction method according to claim 1, wherein:
forming a subgrade after said tamping, comprising:
and carrying out secondary rolling on the rock mass after the secondary mixing and crushing to form the roadbed.
7. The soil roadbed filling construction method according to claim 6, wherein:
after the second pass, the subgrade was sprayed with a low dose grout seal.
8. The soil roadbed filling construction method according to claim 1, wherein:
the volume ratio range of the block rock and the sandy soil in the low-water-content sandy soil is 3.5: 1-5: 1.
9. The soil roadbed filling construction method according to claim 1, wherein:
the first thickness ranges between 15-25 cm.
10. The soil roadbed filling construction method according to claim 1, wherein:
the second thickness ranges between 4-6 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210775455.5A CN115058931B (en) | 2022-07-01 | 2022-07-01 | Soil roadbed filling construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210775455.5A CN115058931B (en) | 2022-07-01 | 2022-07-01 | Soil roadbed filling construction method |
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| Publication Number | Publication Date |
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| CN115058931A true CN115058931A (en) | 2022-09-16 |
| CN115058931B CN115058931B (en) | 2023-11-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119521A (en) * | 2017-05-25 | 2017-09-01 | 中国水利水电第十工程局有限公司 | It is a kind of to improve the method that High water cut silt and silt carry out roadbed filling |
| CN108625243A (en) * | 2017-03-19 | 2018-10-09 | 中国水利水电第工程局有限公司 | Suitable for mountain area hills red clay area high-fill roadbed filling construction method |
| CN110424203A (en) * | 2019-07-30 | 2019-11-08 | 云南省建设投资控股集团有限公司 | A kind of rainy season wet & soft subgrade filling construction method |
| CN112627154A (en) * | 2020-12-16 | 2021-04-09 | 浙大城市学院 | Water network zone lime solidified soil test section filling design method |
-
2022
- 2022-07-01 CN CN202210775455.5A patent/CN115058931B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625243A (en) * | 2017-03-19 | 2018-10-09 | 中国水利水电第工程局有限公司 | Suitable for mountain area hills red clay area high-fill roadbed filling construction method |
| CN107119521A (en) * | 2017-05-25 | 2017-09-01 | 中国水利水电第十工程局有限公司 | It is a kind of to improve the method that High water cut silt and silt carry out roadbed filling |
| CN110424203A (en) * | 2019-07-30 | 2019-11-08 | 云南省建设投资控股集团有限公司 | A kind of rainy season wet & soft subgrade filling construction method |
| CN112627154A (en) * | 2020-12-16 | 2021-04-09 | 浙大城市学院 | Water network zone lime solidified soil test section filling design method |
Non-Patent Citations (3)
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| 栗丽海: "公路膨胀土应用及其改良施工技术" * |
| 王金华: "过湿土路基填料在邵永高速公路邵阳段的应用" * |
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| CN115058931B (en) | 2023-11-17 |
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