CN117265937A - On-site road mixing construction process for cement stabilized sand-doped laterite granules - Google Patents
On-site road mixing construction process for cement stabilized sand-doped laterite granules Download PDFInfo
- Publication number
- CN117265937A CN117265937A CN202311310334.4A CN202311310334A CN117265937A CN 117265937 A CN117265937 A CN 117265937A CN 202311310334 A CN202311310334 A CN 202311310334A CN 117265937 A CN117265937 A CN 117265937A
- Authority
- CN
- China
- Prior art keywords
- laterite
- sand
- cement
- doped
- construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims abstract description 73
- 239000011504 laterite Substances 0.000 title claims abstract description 62
- 229910001710 laterite Inorganic materials 0.000 title claims abstract description 62
- 239000008187 granular material Substances 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 2
- 238000007790 scraping Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000012615 aggregate Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002688 soil aggregate Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
-
- 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
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
- E01C19/187—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect solely for spreading-out or striking-off deposited mixtures, e.g. spread-out screws, strike-off boards
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a site road mixing construction process of cement stabilized sand-doped laterite granules, which ensures the large-scale construction of the cement stabilized sand-doped laterite granules through the measures of site road mixing, a land leveler equipped with a GPS, a steel wheel and a rubber wheel road roller combination and the like. The cement stable sand-doped laterite granule constructed by the method not only can realize large-scale construction, but also has better integrity and compactness, and the construction method can solve the defect that the construction of the large-thickness pavement structural layer cannot be finished due to the lack of special equipment, reduce the cost for purchasing special equipment, is a construction process with better technical economy, and can provide practical and feasible construction guidance for similar projects in African areas.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a site road mixing construction process of cement stabilized sand-doped laterite granules.
Background
The red soil aggregate has large reserves and wide distribution in the global scope, has higher strength due to the fact that the red soil aggregate contains a large amount of substances such as ferric oxide, calcium carbonate and the like in a natural state, has better bearing capacity after being compacted by a road roller, and is widely used in the road construction field around the world.
When the cement stabilized laterite granule is used for a road surface base layer, the cement stabilized laterite granule has larger viscosity after meeting water, is generally mixed with certain natural sand for use, and forms the cement stabilized sand-doped laterite granule, and is mainly used as a roadbed improvement layer between a soil base layer and a base layer in road surface engineering in African areas. In recent years, research and application of cement stabilized sand-doped laterite granules are also paid attention, but no complete construction process of the system exists at present. In particular, in african areas, cement stabilized sand-doped laterite granules are often used for paving roadbed improvement layers of more than 25cm, and the problems of material supply, paving and rolling of a large-thickness structure in continuous construction are particularly remarkable. Due to the fact that construction conditions in African areas fall behind and special equipment is lacking, how to finish construction operation of cement stable sand-doped laterite granules with large thickness by using existing construction equipment, continuity of construction is guaranteed, good implementation effect is achieved, and the construction method is a great problem to be solved urgently.
Disclosure of Invention
Aiming at the problems, the invention provides a site road mixing construction process of cement stabilized sand-doped laterite granules, which ensures the large-scale construction of the cement stabilized sand-doped laterite granules through the measures of site road mixing, a land leveler equipped with a GPS, a steel wheel and rubber wheel road roller combination and the like. The main steps of the invention are as follows:
1) Mixing process
(1) Rolling the lower bearing layer for 1-2 times by using a steel wheel road roller, leveling the surface, sprinkling water on a road section of a preset stacking to moisten the surface,
(2) Measuring the surface elevation H of the lower bearing layer by using a total station 1 A steel template with the same thickness as the designed thickness h of the cement stabilized sand-doped laterite granule is arranged on the road side,
(3) According to the transverse width B, the longitudinal length L and the design thickness of the construction section of the cement stabilized sand-doped laterite aggregate, the cement stabilized sand-doped laterite aggregate density and the proportion among cement, sand, laterite aggregate and water which are obtained by combining the mixing proportion design, the mass of cement, sand, laterite aggregate and water which are required per square meter in the construction section is calculated,
(4) According to the transverse width of the construction paragraph and the quality of the required laterite granules and sand per square meter, calculating the longitudinal length piled up when each transport vehicle is filled with the laterite granules and sand, marking a longitudinal boundary on the surface of the lower bearing layer by adopting cement powder, unloading the laterite granules and sand in the transport vehicle into a distribution square lattice formed between the longitudinal boundary and steel templates on two sides of the construction section,
(5) According to the required cement quality per square meter and the bagged cement quality per bag, the longitudinal space and the transverse space for placing the bagged cement are determined, the bagged cement is unpacked and poured onto the surface of the lower bearing layer,
(6) Mixing the laterite granules, sand and cement by a loader,
(7) According to the water consumption required by each square meter, a sprinkler is adopted to sprinkle water,
(8) Mixing the laterite granules, sand, cement and water together by adopting a common land leveler;
2) Spreading process
(a) Adjusting the height of the bottom of the land leveller blade with GPS to H 2 The position is higher than the height h x alpha of the surface of the lower bearing layer, then preliminary flattening is carried out according to the procedures of forward flattening for 1 time, raking teeth for 1 time and forward flattening for 1 time,
(b) After preliminary flattening is finished, the double-steel-wheel road roller is used for prepressing once in a front static back vibration mode,
(c) After the prepressing is finished, the bottom of the land leveller blade with the GPS is highThe process is adjusted to H 3 The position is higher than the height h x (alpha+1)/2 of the surface of the lower bearing layer, and then accurate flattening is carried out according to the procedures of forward flattening for 1 time, reverse flattening for 1 time and forward flattening for 1 time;
3) Compacting process
(A) The cement stable sand-doped red soil granules which are precisely flattened are rolled for 4 to 6 times by adopting a double-steel-wheel road roller in a front static back vibration mode,
(B) After the compactness meets the requirement, adopting a land leveler with a GPS to carry out the scraping treatment, and adjusting the height of the bottom of the land leveler shovel blade to H 4 The position of the surface of the lower bearing layer is higher than the height h of the surface of the lower bearing layer, the surface is flattened according to the working procedure of forward flattening for 1 time and reverse flattening for 1 time,
(C) Finally, static pressure surface collection is carried out for 2 times from the side line to the central line by using a rubber-tyred roller;
4) Health preserving process
And after compaction is finished, immediately carrying out water sprinkling and curing on the cement stabilized sand-doped laterite granules, covering the cement stabilized sand-doped laterite granules with geotextile, and then carrying out water sprinkling and curing for more than 5 times each day until the upper material begins to be constructed.
In the step (8), the mixing mode is that forward walking and reverse harrow teeth are scarified as one mixing cycle, and 4-6 cycles are needed to be mixed until the cement stabilized sand-doped laterite granule has uniform properties and no obvious cement powder or water mark phenomenon.
Before the preliminary flattening is started, a 50m mixing section is completed along the direction of the road trend.
After the paving was completed by 50m, the compacting operation was started.
The compactness meeting requirement is that 3 positions are randomly selected for compactness detection, and the average value of the compactness at 3 positions is larger than the design requirement, so that the compactness meeting requirement is shown.
And (3) detecting and recording the compactness after the rolling of the step (A) is finished, and developing the next step when the compactness meets the requirement, otherwise, increasing the rolling times of the single-steel-wheel road roller until the compactness meets the requirement.
The invention mainly utilizes measures such as on-site road mixing, a land leveler with a GPS, a steel wheel and a rubber wheel road roller combination and the like to ensure the large-scale construction of the cement stabilized sand-doped laterite granule, and the constructed structural layer has good integrity and compactness and has practical guiding significance for similar engineering in African areas.
Detailed Description
The concrete embodiment of the invention is described by taking the construction of a cement stabilized sand-doped laterite granule roadbed improvement layer of an expressway project in Africa as an example.
The design thickness h of the highway cement stabilized sand-doped laterite granule is 30cm, and the thickness is larger than 20cm, so that the highway cement stabilized sand-doped laterite granule belongs to a large-thickness structural layer, and the construction method in the invention is used in construction, and comprises the following specific steps:
1) Mixing process
(1) And rolling the lower bearing layer for 1-2 times by using a steel wheel road roller, leveling the surface, and sprinkling water on a road section of a preset stacking to moisten the surface.
(2) Measuring the surface elevation H of the lower bearing layer by using a total station 1 A steel form with a thickness of 30cm was installed on the road side at 10 m.
(3) The construction section of the cement stabilized sand-doped laterite granule has a transverse width B of 11.5m, a longitudinal length L of 50m and a design thickness of 30cm, and the density of the cement stabilized sand-doped laterite granule obtained by the design of the mixing ratio is 2.45g/cm 3 The mass percentages of cement, sand, laterite granules and water are 2.3 percent: 12.1%:80.4%:5.2%, the mass of each material required per square meter in the construction paragraph is calculated as follows: 16.9kg of cement, 88.9kg of sand, 590.9kg of laterite granules and 38.2kg of water.
(4) The quality of the laterite granules and sand which can be loaded by each transport vehicle used in the engineering is 25t, and the longitudinal length which can be piled up when each transport vehicle is filled with the laterite granules or sand is 3.7m and 24.5m by combining the transverse width of 11.5m of the construction paragraph, the required quality of the laterite granules per square meter of 590.9kg and the required quality of the sand of 88.9kg, and the longitudinal boundary is marked on the surface of the lower bearing layer by adopting cement powder. The laterite granules and sand in the transport vehicle are unloaded into the cloth square formed between the longitudinal boundary and the steel templates at two sides of the construction section at one time and continuously and uniformly.
(5) The bagged cement used in the engineering has the mass of 25kg per bag, the required cement mass of 16.9kg per square meter, and the transverse interval is arranged according to 1.15m, so that the longitudinal interval for placing the bagged cement is 1.28m, the bagged cement is placed according to the interval, and the bagged cement is poured onto the surface of the lower bearing layer after being opened.
(6) Mixing the laterite granules, sand and cement by using a loader.
(7) And setting the sprinkling dosage of the sprinkling truck according to 38.2kg of water consumption required per square meter, and sprinkling by the sprinkling truck.
(8) The laterite pellets, sand, cement and water were mixed together using a conventional grader. When mixing, the forward walking and reverse harrow teeth are scarified as a mixing cycle, and after 5 mixing cycles, the cement stable sand-doped laterite granule has uniform properties and no obvious cement powder or water mark phenomenon, and the mixing process is completed.
2) Spreading process
(1) When the construction paragraph of 50m mixing is completed along the direction of the road trend, a land leveler equipped with a GPS is adopted for preliminary flattening. When preliminary leveling, the elevation H of the bottom of the land leveler shovel blade is adjusted 2 Is controlled to be 39.6cm higher than the surface elevation of the lower bearing layer, namely the elevation H of the bottom of the grader blade at the moment 2 10.396m. And then, preliminary flattening is carried out according to the working procedures of forward flattening for 1 time, raking teeth for 1 time and forward flattening for 1 time.
(2) After preliminary flattening is completed, the double-steel-wheel road roller is used for prepressing once in a front static back vibration mode.
(3) After the prepressing is finished, the bottom elevation H of the land leveller blade with GPS is provided 3 Is controlled to be 34.8cm higher than the surface elevation of the lower bearing layer, namely the elevation H of the bottom of the grader blade at the moment 3 10.348m. And then precisely flattening according to the procedures of forward flattening for 1 time, reverse flattening for 1 time and forward flattening for 1 time.
3) Compaction
(1) The cement stabilized sand-doped laterite granules which are precisely flattened are rolled for 5 times by using a double-steel-wheel road roller in a front static back vibration mode, and the road roller walks from a side line to a center line.
(2) After rolling, 3 positions are randomly selected for compactness detection, wherein the average value of the compactibility at 3 positions is 98.5% which is greater than 96% of design requirements, which indicates that the compactibility meets the requirements.
(3) Adopting a land leveler with a GPS to carry out leveling treatment, and carrying out the elevation H of the bottom of the shovel blade of the land leveler 4 Is controlled to be 30cm higher than the surface of the lower bearing layer, namely the height H of the bottom of the grader blade at the moment 4 10.30m. The shaving treatment is carried out according to the working procedures of forward leveling for 1 time and reverse leveling for 1 time.
(4) Finally, the surface is folded 2 times by hydrostatic pressure from the side line to the center line by using a rubber-tyred roller.
5) Health preserving
And after compaction is finished, immediately carrying out water spraying and curing on the cement stabilized sand-doped laterite granules, covering the cement stabilized sand-doped laterite granules with geotextile, and then carrying out water spraying and curing for 6 times each day until the upper material begins to be constructed.
After construction is completed, the average compaction degree of the highway cement stable sand-doped laterite granular material structure layer can reach 98.1 percent through detection, and is larger than the design requirement value by 96 percent, and the compactibility is good. The average thickness of the cement stabilized sand-doped laterite granular material structure layer is 30.1cm through core drilling detection, the design thickness requirement is met, the bottom of a core sample is compact, obvious honeycomb gaps are not seen, the integrity and the compactness are good, construction of the next working procedure can be carried out, and the construction quality of the highway adopting the invention is good due to the pavement structure layer. Therefore, the construction method can realize good construction effect, solve the defect that the construction of the pavement structure layer with large thickness can not be completed due to the lack of special equipment, reduce the expense of purchasing special equipment and be a construction process with better technical economy.
The invention uses the measures of on-site road mixing, a land leveler equipped with a GPS, a steel wheel and a rubber wheel road roller combination and the like to ensure the large-scale construction of the cement stabilized sand-doped laterite granules, and the constructed structural layer has good integrity and compactness and has practical guiding significance for similar engineering in African areas.
Claims (6)
1. A cement stabilized sand-doped laterite pellet comprising: the on-site mixing process, the paving process, the compacting process and the health preserving process comprise the following specific steps:
1) Mixing process
(1) Rolling the lower bearing layer for 1-2 times by using a steel wheel road roller, leveling the surface, sprinkling water on a road section of a preset stacking to moisten the surface,
(2) Measuring the surface elevation H of the lower bearing layer by using a total station 1 A steel template with the same thickness as the designed thickness h of the cement stabilized sand-doped laterite granule is arranged on the road side,
(3) According to the transverse width B, the longitudinal length L and the design thickness of the construction section of the cement stabilized sand-doped laterite aggregate, the cement stabilized sand-doped laterite aggregate density and the proportion among cement, sand, laterite aggregate and water which are obtained by combining the mixing proportion design, the mass of cement, sand, laterite aggregate and water which are required per square meter in the construction section is calculated,
(4) According to the transverse width of the construction paragraph and the quality of the required laterite granules and sand per square meter, calculating the longitudinal length piled up when each transport vehicle is filled with the laterite granules and sand, marking a longitudinal boundary on the surface of the lower bearing layer by adopting cement powder, unloading the laterite granules and sand in the transport vehicle into a distribution square lattice formed between the longitudinal boundary and steel templates on two sides of the construction section,
(5) According to the required cement quality per square meter and the bagged cement quality per bag, the longitudinal space and the transverse space for placing the bagged cement are determined, the bagged cement is unpacked and poured onto the surface of the lower bearing layer,
(6) Mixing the laterite granules, sand and cement by a loader,
(7) According to the water consumption required by each square meter, a sprinkler is adopted to sprinkle water,
(8) Mixing the laterite granules, sand, cement and water together by adopting a common land leveler;
2) Spreading process
(a) Adjusting the height of the bottom of the land leveller blade with GPS to H 2 The position is higher than the height h x alpha of the surface of the lower bearing layer, and then the work is flattened for 1 time in the forward direction, raked for 1 time by raking teeth and flattened for 1 time in the forward directionThe preliminary flattening is carried out in sequence,
(b) After preliminary flattening is finished, the double-steel-wheel road roller is used for prepressing once in a front static back vibration mode,
(c) After the prepressing is finished, the height of the bottom of the land leveller blade with the GPS is adjusted to be H 3 The position is higher than the height h x (alpha+1)/2 of the surface of the lower bearing layer, and then accurate flattening is carried out according to the procedures of forward flattening for 1 time, reverse flattening for 1 time and forward flattening for 1 time;
3) Compacting process
(A) The cement stable sand-doped red soil granules which are precisely flattened are rolled for 4 to 6 times by adopting a double-steel-wheel road roller in a front static back vibration mode,
(B) After the compactness meets the requirement, adopting a land leveler with a GPS to carry out the scraping treatment, and adjusting the height of the bottom of the land leveler shovel blade to H 4 The position of the surface of the lower bearing layer is higher than the height h of the surface of the lower bearing layer, the surface is flattened according to the working procedure of forward flattening for 1 time and reverse flattening for 1 time,
(C) Finally, static pressure surface collection is carried out for 2 times from the side line to the central line by using a rubber-tyred roller;
4) Health preserving process
And after compaction is finished, immediately carrying out water sprinkling and curing on the cement stabilized sand-doped laterite granules, covering the cement stabilized sand-doped laterite granules with geotextile, and then carrying out water sprinkling and curing for more than 5 times each day until the upper material begins to be constructed.
2. The construction process according to claim 1, wherein the mixing mode in the step (8) is that forward walking and reverse rake teeth are scarified as one mixing cycle, and the mixing is preferably carried out for 4-6 cycles until the properties of the cement stabilized sand-doped laterite are uniform and no obvious cement powder or water mark phenomenon exists.
3. The construction process according to claim 1, wherein the preliminary flattening is carried out before the 50m mixing section is completed along the road direction.
4. The construction process according to claim 1, wherein the compacting operation is started after the paving is completed by 50 m.
5. The construction process according to claim 1, wherein the compactness meeting requirement is that 3 positions are randomly selected for compactness detection, and the average value of the 3 positions is larger than the design requirement, which indicates that the compactness meets the requirement.
6. The construction process according to claim 7, wherein after the rolling of the single steel wheel road roller in the step (a) is completed, the compactness is detected and recorded, and the next step is performed when the compactness meets the requirement, otherwise, the rolling times of the single steel wheel road roller should be increased until the compactness meets the requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311310334.4A CN117265937A (en) | 2023-10-11 | 2023-10-11 | On-site road mixing construction process for cement stabilized sand-doped laterite granules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311310334.4A CN117265937A (en) | 2023-10-11 | 2023-10-11 | On-site road mixing construction process for cement stabilized sand-doped laterite granules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117265937A true CN117265937A (en) | 2023-12-22 |
Family
ID=89210313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311310334.4A Pending CN117265937A (en) | 2023-10-11 | 2023-10-11 | On-site road mixing construction process for cement stabilized sand-doped laterite granules |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117265937A (en) |
-
2023
- 2023-10-11 CN CN202311310334.4A patent/CN117265937A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6841964B2 (en) | Construction method of combined dam | |
| CN111893825A (en) | Novel embankment construction method using calcium sand concrete | |
| CN101974898B (en) | Roller compacted concrete cushion changing and filling method | |
| CN107338686A (en) | A kind of Subgrade Filled Soil in High Speed Railway construction method | |
| CN106522074A (en) | Construction technology for gravel-pebble-soil roadbed of expressway | |
| CN107805989A (en) | Temporary road rolling compacted concrete pavement reconstruction structure and its construction method | |
| CN113699971A (en) | Soft soil stratum in-situ curing agent preparation feeding equipment and curing process thereof | |
| CN108191310A (en) | A kind of solidified earth and the antifouling impervious processing method of big type coal field | |
| CN107653758A (en) | Laterite bound edge wind-blown sand fill subgrade construction method | |
| CN108774931A (en) | A kind of subgrade construction technique suitable for saline soil area | |
| CN107503256A (en) | A kind of sandy soil improves filling roadbed construction method | |
| CN113699852A (en) | Environment-friendly high-strength solidified soil construction process | |
| CN103422407A (en) | Construction process using cement diatomite to stabilize desert sand mixture to build Niger desert road | |
| CN107447617B (en) | A kind of dust-proof curing process of temporary construction road | |
| CN109537385A (en) | Construction process for filling foundation with silt | |
| CN112523021A (en) | Cement soil roadbed cushion for highway engineering and construction process and detection method thereof | |
| CN117265937A (en) | On-site road mixing construction process for cement stabilized sand-doped laterite granules | |
| CN111827033A (en) | Construction method for widening and filling solidified soil of expressway intercommunicating ramp roadbed | |
| CN115745482A (en) | Preparation method and application of soil-concreted rock composite material for roadbed base layer | |
| CN117107577A (en) | Plant-mixing construction process of cement stabilized sand-doped laterite granules | |
| CN111395091A (en) | On-site road mixing construction method for treating laterite granules by using large-thickness cement | |
| CN111364311A (en) | Centralized plant mixing construction method for treating laterite granules by using large-thickness cement | |
| CN111535323A (en) | Full-section quasi-tertiary matching long-age roller compacted concrete construction method | |
| CN117248415A (en) | Paving method of cement stabilized sand-doped laterite granules | |
| Sharp | Concrete in Highway Engineering: International Series of Monographs in Civil Engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |