CN112681079A - Soil body solidification and concrete cap surface gathering construction method applied to temporary road foundation - Google Patents
Soil body solidification and concrete cap surface gathering construction method applied to temporary road foundation Download PDFInfo
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- CN112681079A CN112681079A CN202011488736.XA CN202011488736A CN112681079A CN 112681079 A CN112681079 A CN 112681079A CN 202011488736 A CN202011488736 A CN 202011488736A CN 112681079 A CN112681079 A CN 112681079A
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Abstract
The invention discloses a method for solidifying soil body of temporary road foundation and constructing a concrete overlay, belonging to the technical field of road construction. The invention comprises a surface layer of the poly-concrete, a second layer of the solidified soil and a first layer of the solidified soil, and the method comprises the following steps: the method comprises the following steps: constructing a solidified soil base layer and a subbase layer; step two: detecting an underlayer; step three: construction lofting; step four: spreading plain soil; step five: spraying a curing agent; step six: mixing the mixture; step seven: primary pressing of solidified soil; step eight: final pressing, leveling and maintaining; step nine: novel multidimensional agglomerated concrete cover. The invention is suitable for various roads, terrace base layers and roadbeds; the solidified soil layer has enough strength and stability, has certain water invasion resistance in southern areas, has smaller shrinkage deformation and stronger scouring resistance, and has the all-round advantages of reliable quality, cost reduction of the whole soil layer, shorter construction period and more environmental protection.
Description
Technical Field
The invention relates to the technical field of road construction, in particular to a method for solidifying soil mass of a temporary road foundation and constructing a concrete overlay.
Background
The traditional construction process has large requirements on the exploitation and utilization of native high-quality stones and many problems caused by the transport of earthwork, and is just as clear, the traditional temporary road cannot meet the current social requirement of green resource conservation, and the traditional construction method has poor supporting performance and long construction period and cannot meet the requirements on mechanical performance of road covers.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the defects and shortcomings in the prior art, the invention provides a method for solidifying soil mass of a temporary road foundation and constructing a concrete overlay, which is suitable for various roads, terrace base layers and roadbeds; the solidified soil layer has enough strength and stability, has certain water invasion resistance in southern areas, has smaller shrinkage deformation and stronger scouring resistance, and has the all-round advantages of reliable quality, cost reduction of the whole soil layer, shorter construction period and more environmental protection.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a soil body solidifying and concrete cover surface constructing method applied to a temporary road foundation, which comprises a concrete surface layer, a solidified soil second layer and a solidified soil first layer, and comprises the following steps:
the method comprises the following steps: constructing a solidified soil base layer and a subbase layer, excavating according to the designed subbase layer bottom elevation by using an excavator on site, and piling the excavated plain soil on two sides;
step two: detecting an underlayer;
step three: construction lofting, namely releasing the center line and the outer side line of the original foundation, and scattering one lime line respectively 30cm away from the peripheries of the two sides of the terrace side line for controlling the outer side line of the bottom layer;
step four: spreading plain soil;
step five: spraying a curing agent;
step six: mixing the mixture;
step seven: primary pressing of solidified soil;
step eight: final pressing, leveling and maintaining;
step nine: novel multidimensional agglomerated concrete cover.
Further, the main indexes of the solidified soil detection are as follows: the solidified soil has high compactness, and can reach compaction indexes with different requirements after forming a hardened whole; the later strength of the solidified soil is obviously increased, and the strength is continuously improved along with the increase of the age; for the soil for mixing, a representative sample was taken and subjected to the following tests: analyzing the particles; liquid limit and plasticity index; performing compaction test; organic matter content; sulfate content.
Further, the novel multidimensional agglomerated concrete cover comprises: the cement concrete has good flexibility by using the multi-dimensional adhesive polymerization modifier, and the road cover is greatly improved to meet the requirement of mechanical property.
Further, the second step: before solidified soil construction, detecting the bottom elevation of the subbase layer according to the requirements of an original design drawing, asking a main engineer to track the subbase layer in the whole process, if an unqualified area appears, processing, repeating the detection after the processing is finished, and cleaning and finishing the working face after the requirements are met.
Further, the fourth step: before the plain soil is paved, manually picking out organic matters and large-particle-size stones in a soil body, wherein the soil raw material must meet the requirements of site construction, a bulldozer and an excavator are adopted for paving, and the paving thickness is strictly controlled according to elevation data measured and calculated.
Further, the fifth step: pouring the curing agent into the sprinkling truck for dilution according to the water content of the on-site soil body and the capacity of the sprinkling truck; uniformly spreading the cement on the surface of the plain soil by using a cement spreader according to the cement dosage per square meter; the watering cart and the cold recycling machine are used in a matching way, and the soil body which is scattered with cement is mixed at a slow speed along the whole longitudinal direction.
Further, the seventh step: using a rolling tool: the rolling speed of the 20-ton vibratory roller is required to be slow firstly and then fast; the operation sequence should be from low side to high side, and the solidified soil layer after the road roller is primarily pressed can not meet the requirement of the flatness, and the road roller needs to be primarily leveled and trimmed by a grader and then secondarily compacted.
Further, the step eight: after the solidified soil structural layer is rolled, the solidified soil structural layer is covered with geotextile for curing in time, after the rolling is finished, the traffic watering curing is closed for one circle, and the construction of the solidified soil second layer is repeated.
The solidified soil comprises cement and soil, and is added with a soil solidifying agent.
Further, the ninth step: the novel multidimensional agglomerated concrete cover surface comprises the following components in proportion of 1 formula: 5kg of pyrrolidone modified complexing micro powder, 320kg of cement, 1kg of polypropylene fiber, 680kg of sand and 1280kg of stones, wherein the 28-day flexural strength of the modified complexing micro powder is more than 5.0MPa, and the construction steps are as follows: removing loose molecules on the surface of the solidified soil by using an air blower in combination with manual cleaning, keeping the solidified soil layer dry, setting an operation area, and batching in a specified area according to the workload of the day; erecting a stirrer, pouring various materials, adding a proper amount of water, and stirring for 3-4 minutes; after stirring, checking the water content, forcibly stirring again by using a rhinestone, thoroughly and uniformly stirring materials which are likely to be agglomerated, sending the materials to a forecourt by using a loader, after the materials are mixed, putting the main body part into a trolley to control the pouring of the materials into a designated area, and taking the materials from corner parts by using a charging barrel; raking the mixed material into a uniform thickness by using a height-limiting iron rake; gradually operating until the workload of the current day is finished; and covering the finished area with geotextile or plastic film after the initial setting period is reached, and timely and fully watering for health preservation.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention is suitable for various roads, terrace base layers and roadbeds; the solidified soil layer has sufficient strength and stability, has certain water-invasion resistance in southern areas, has smaller shrinkage deformation and stronger scour resistance, adopts the soil solidification technology structure design to implement the principle of local materials, makes a thorough investigation on local materials, selects an environment-friendly soil stabilization material with reliable technology and reasonable economy, adopts the matching ratio design, adopts a part according to the heavy compaction standard, meets a certain compaction degree requirement, and has the all-round advantages of reliable quality, integral cost reduction, shorter construction period and more environmental protection.
Drawings
FIG. 1 is a cross-sectional view of the present invention.
In the figure: 1. a surface layer of agglomerated soil; 2. a second layer of solidified soil; 3. and solidifying the first layer of soil.
Detailed Description
The invention is further described with reference to the following figures and examples:
example 1
As can be seen from fig. 1, the method for solidifying soil mass of temporary road foundation and constructing concrete overlay comprises a concrete overlay 1, a second solidified soil layer 2 and a first solidified soil layer 3, and comprises the following steps:
the method comprises the following steps: constructing a solidified soil base layer and a subbase layer, excavating according to the designed subbase layer bottom elevation by using an excavator on site, and piling the excavated plain soil on two sides;
step two: detecting the subbase layer, detecting the subbase layer bottom elevation according to the requirements of the original design drawing before the solidified soil construction, requesting an owner engineer to track the subbase layer in the whole process, if an unqualified area appears, processing, repeating the detection after the processing is finished, and cleaning and finishing the working surface after the requirements are met;
step three: construction lofting, namely releasing the center line and the outer side line of the original foundation, and scattering one lime line respectively 30cm away from the peripheries of the two sides of the terrace side line for controlling the outer side line of the bottom layer;
step four: the method comprises the following steps of (1) paving plain soil, wherein before the plain soil is paved, organic matters and large-particle-size stones in a soil body are manually picked, soil raw materials need to meet the requirements of site construction, a bulldozer and an excavator are adopted for rough leveling, and the paving thickness is strictly controlled according to elevation data measured and calculated;
step five: spraying a curing agent, namely pouring the curing agent into a sprinkling truck for dilution according to the water content of the on-site soil body and the capacity of the sprinkling truck; uniformly spreading the cement on the surface of the plain soil by using a cement spreader according to the cement dosage per square meter;
step six: mixing the mixture, namely mixing the mixture at a low speed by matching a watering cart with a cold regenerator along the whole longitudinal direction;
step seven: the solidified soil is primarily pressed, and a rolling tool is utilized: the rolling speed of the 20-ton vibratory roller is required to be slow firstly and then fast; the operation sequence is from low side to high side, the solidified soil layer after the primary pressing of the road roller can not meet the requirement of the flatness, the primary leveling and trimming are required to be carried out by using a land leveler, and then the road roller is compacted for the second time;
step eight: finishing, leveling and maintaining, namely covering geotextile in time for health maintenance after the solidified soil structural layer is rolled, closing traffic water spraying and maintaining for a circle after the rolling is finished, and repeating the process for constructing the second solidified soil layer 2;
step nine: novel multidimensional agglomerated concrete cover.
Main indexes of solidified soil detection are as follows: the solidified soil has high compactness, and can reach compaction indexes with different requirements after forming a hardened whole; the later strength of the solidified soil is obviously increased, and the strength is continuously improved along with the increase of the age; for the soil for mixing, a representative sample was taken and subjected to the following tests: analyzing the particles; liquid limit and plasticity index; performing compaction test; organic matter content; sulfate content.
The novel multidimensional agglomerated concrete cover comprises the following components: the cement concrete has good flexibility by using the multi-dimensional adhesive polymerization modifier, and the road cover is greatly improved to meet the requirement of mechanical property.
The solidified soil comprises cement and soil, and is added with a soil solidifying agent.
Step nine: the novel multidimensional agglomerated concrete cover surface comprises the following components in proportion of 1 formula: 5kg of pyrrolidone modified complexing micro powder, 320kg of cement, 1kg of polypropylene fiber, 680kg of sand and 1280kg of stones, wherein the 28-day flexural strength of the modified complexing micro powder is more than 5.0MPa, and the construction steps are as follows: removing loose molecules on the surface of the solidified soil by using an air blower in combination with manual cleaning, keeping the solidified soil layer dry, setting an operation area, and batching in a specified area according to the workload of the day; erecting a stirrer, pouring various materials, adding a proper amount of water, and stirring for 3-4 minutes; after stirring, checking the water content, forcibly stirring again by using a rhinestone, thoroughly and uniformly stirring materials which are likely to be agglomerated, sending the materials to a forecourt by using a loader, after the materials are mixed, putting the main body part into a trolley to control the pouring of the materials into a designated area, and taking the materials from corner parts by using a charging barrel; raking the mixed material into a uniform thickness by using a height-limiting iron rake; gradually operating until the workload of the current day is finished; and covering the finished area with geotextile or plastic film after the initial setting period is reached, and timely and fully watering for health preservation.
After the construction of the poly-concrete surface layer 1, the solidified soil second layer 2 and the solidified soil first layer 3 is completed, the follow-up operation is carried out: cutting seams, cleaning and blowing clean, and filling welding seam dosage; cleaning the whole road, and spraying a binary modifier.
The dosage of the cementing material actually adopted by the construction site is higher than that determined by an indoor test, and the cementing material can be increased by 0.5 percent when the centralized plant mixing method is adopted for construction; when the road mixing method is adopted for construction, the cementing material can be increased by 1.0 percent.
The quality detection method and the detection frequency of the invention are strictly executed according to technical rules of highway cement concrete pavement construction and acceptance standards JTG/TF30-2014, and the indexes such as compactness, unconfined compressive strength and the like are mainly controlled.
In order to ensure the qualified project, according to the condition of the project, the quality standard used for the project in the company is formulated by combining the current technical specification, the standard ' construction quality acceptance specification for construction ground engineering ' GB50209-2010 ' and the ' soil solidifying agent application technical standard ' CJJ/T286-2018.
The compaction degree of each layer of solidified soil is not less than 95% and is subjected to field detection by a third party; when the solidified soil mixture is filled, the on-site mixture is sent to a third party laboratory for test piece molding under the supervision evidence, and the unconfined compressive strength is detected after standard culture for 7 days, wherein the strength requirement reaches above the specified requirement of a design drawing; for various performance tests of the novel cover surface, the on-site sampling is carried out by a third party for detection according to the standard.
The invention is suitable for various roads, terrace base layers and roadbeds; the solidified soil layer has sufficient strength and stability, has certain water-invasion resistance in southern areas, has smaller shrinkage deformation and stronger scour resistance, adopts the soil solidification technology structure design to implement the principle of local materials, makes a thorough investigation on local materials, selects an environment-friendly soil stabilization material with reliable technology and reasonable economy, adopts the matching ratio design, adopts a part according to the heavy compaction standard, meets a certain compaction degree requirement, and has the all-round advantages of reliable quality, integral cost reduction, shorter construction period and more environmental protection.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. The utility model provides a be applied to solidification of temporary road foundation soil body and concrete cover face construction method, includes concrete cover face layer (1), solidified soil second floor (2) and solidified soil first floor (3), its characterized in that: the method comprises the following steps:
the method comprises the following steps: constructing a solidified soil base layer and a subbase layer, excavating according to the designed subbase layer bottom elevation by using an excavator on site, and piling the excavated plain soil on two sides;
step two: detecting an underlayer;
step three: construction lofting, namely releasing the center line and the outer side line of the original foundation, and scattering one lime line respectively 30cm away from the peripheries of the two sides of the terrace side line for controlling the outer side line of the bottom layer;
step four: spreading plain soil;
step five: spraying a curing agent;
step six: mixing the mixture;
step seven: primary pressing of solidified soil;
step eight: final pressing, leveling and maintaining;
step nine: novel multidimensional agglomerated concrete cover.
2. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: main indexes of solidified soil detection are as follows: the solidified soil has high compactness, and can reach compaction indexes with different requirements after forming a hardened whole; the later strength of the solidified soil is obviously increased, and the strength is continuously improved along with the increase of the age; for the soil for mixing, a representative sample was taken and subjected to the following tests: analyzing the particles; liquid limit and plasticity index; performing compaction test; organic matter content; sulfate content.
3. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the novel multidimensional agglomerated soil cover comprises the following components: the cement concrete has good flexibility by using the multi-dimensional adhesive polymerization modifier, and the road cover is greatly improved to meet the requirement of mechanical property.
4. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the second step is that: before solidified soil construction, detecting the bottom elevation of the subbase layer according to the requirements of an original design drawing, asking a main engineer to track the subbase layer in the whole process, if an unqualified area appears, processing, repeating the detection after the processing is finished, and cleaning and finishing the working face after the requirements are met.
5. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the fourth step is that: before the plain soil is paved, manually picking out organic matters and large-particle-size stones in a soil body, wherein the soil raw material must meet the requirements of site construction, a bulldozer and an excavator are adopted for paving, and the paving thickness is strictly controlled according to elevation data measured and calculated.
6. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the fifth step is as follows: pouring the curing agent into the sprinkling truck for dilution according to the water content of the on-site soil body and the capacity of the sprinkling truck; uniformly spreading the cement on the surface of the plain soil by using a cement spreader according to the cement dosage per square meter; the watering cart and the cold recycling machine are used in a matching way, and the soil body which is scattered with cement is mixed at a slow speed along the whole longitudinal direction.
7. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the seventh step: using a rolling tool: the rolling speed of the 20-ton vibratory roller is required to be slow firstly and then fast; the operation sequence should be from low side to high side, and the solidified soil layer after the road roller is primarily pressed can not meet the requirement of the flatness, and the road roller needs to be primarily leveled and trimmed by a grader and then secondarily compacted.
8. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the eighth step: after the solidified soil structural layer is rolled, the solidified soil structural layer is covered with geotextile for curing in time, after the rolling is finished, the traffic watering curing is closed for one circle, and the construction of the solidified soil second layer (2) is repeated.
9. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the solidified soil comprises the components of cement and soil, and is added with a soil solidifying agent.
10. The method for solidifying soil mass and constructing concrete overlay as claimed in claim 1, wherein the method comprises the following steps: the ninth step: the novel multidimensional agglomerated concrete cover surface comprises the following components in proportion of 1 formula: 5kg of pyrrolidone modified complexing micro powder, 320kg of cement, 1kg of polypropylene fiber, 680kg of sand and 1280kg of stones, wherein the 28-day flexural strength of the modified complexing micro powder is more than 5.0MPa, and the construction steps are as follows: removing loose molecules on the surface of the solidified soil by using an air blower in combination with manual cleaning, keeping the solidified soil layer dry, setting an operation area, and batching in a specified area according to the workload of the day; erecting a stirrer, pouring various materials, adding a proper amount of water, and stirring for 3-4 minutes; after stirring, checking the water content, forcibly stirring again by using a rhinestone, thoroughly and uniformly stirring materials which are likely to be agglomerated, sending the materials to a forecourt by using a loader, after the materials are mixed, putting the main body part into a trolley to control the pouring of the materials into a designated area, and taking the materials from corner parts by using a charging barrel; raking the mixed material into a uniform thickness by using a height-limiting iron rake; gradually operating until the workload of the current day is finished; and covering the finished area with geotextile or plastic film after the initial setting period is reached, and timely and fully watering for health preservation.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112376535A (en) * | 2020-11-02 | 2021-02-19 | 中建三局第二建设工程有限责任公司 | High-temperature desert abdominal land large-area field flattening and sand fixing method |
| CN113603418A (en) * | 2021-08-09 | 2021-11-05 | 中国十七冶集团有限公司 | Polymerized concrete overlay and construction method thereof |
| CN113668336A (en) * | 2021-08-27 | 2021-11-19 | 中国十七冶集团有限公司 | Road base construction method |
| CN114232406A (en) * | 2021-10-29 | 2022-03-25 | 中国建筑设计研究院有限公司 | Ecological pedestrian mud road and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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