阅读说明：本技术 一种环保保水保湿型路面结构及建造方法 (Environment-friendly water-preserving type pavement structure and construction method ) 是由 张建立 杨立 刘嘉东 张健新 于 2021-10-29 设计创作，主要内容包括：本发明公开了一种环保保水保湿型路面结构及建造方法,路基路面的基层、垫层、面层材料依次由砖渣、泥结碎石、钢渣组成。砖渣对高含水率软弱路基有很好的改良作用；泥结碎石粘结力强,塑性指数高,薄层可作为良好的传力过度层；钢渣强度高、耐磨性好是一种良好的环境友好型新型路面材料。和现有的沥青、混凝土路面相比,此种方法不仅路面强度更高、耐久性更好、造价更低,而且对建筑垃圾资源化、建设资源节约型、环境友好型社会有着重大意义。(The invention discloses an environment-friendly water-retaining pavement structure and a construction method thereof. The brick slag has good improvement effect on the soft roadbed with high water content; the mud-bonded macadam has strong cohesive force and high plasticity index, and the thin layer can be used as a good force transmission transition layer; the steel slag has high strength and good wear resistance, and is a good environment-friendly novel pavement material. Compared with the prior asphalt and concrete road surface, the method has the advantages of higher road surface strength, better durability and lower manufacturing cost, and has great significance for the reclamation of construction wastes, the conservation of construction resources and the environment-friendly society.)

1. The utility model provides an environmental protection water moisturizing type road surface structure which characterized in that: comprises a base layer, a cushion layer and a surface layer which are sequentially composed of brick slag, mud-bonded macadam and steel slag.

2. The environment-friendly water-retaining pavement structure according to claim 1, characterized in that: the base layer is positioned at the bottom layer and is a partial roadbed filled by brick slag with the thickness of 50 cm.

3. The environment-friendly water-retaining pavement structure according to claim 1, characterized in that: the cushion layer is positioned in the middle layer and is made of mud-bonded broken stones with the thickness of 15 cm.

4. The environment-friendly water-retaining pavement structure according to claim 1, characterized in that: the surface layer is positioned on the top layer and adopts steel slag with the thickness of 10 cm.

5. An environment-friendly water-retaining moisture-retaining pavement construction method is characterized by comprising the following steps:

excavating a roadbed and processing a base;

performing brick slag replacement and filling in the excavated roadbed;

spreading lime soil on the surface layer of the brick slag after the replacement and filling, and shaping and rolling;

paving mud-bonded gravel on the shaped lime soil;

and paving a steel slag surface layer on the paved mud-bonded macadam.

6. The method for constructing an environment-friendly water-retaining and moisture-retaining pavement as claimed in claim 1, wherein the brick-slag replacement is carried out in two layers;

sorting and replacing the first layer of brick slag when replacing the first layer of brick slag, filling the brick blocks with large grain size to the soft soil surface by an excavator, filling the joints of the stone blocks with small grain size, leveling the local unbalanced positions by fine scraps in a matching way, rolling and leveling by a road roller, burying a settlement observation point in the surface, actually measuring the elevation of the settlement observation point, performing slight shock rolling by the same type of road roller again, measuring the settlement amount within 8mm after compaction, and backfilling the second layer of brick slag;

and after the second layer of brick slag is completely replaced, leveling by using site machinery.

7. The method of constructing an environment-friendly water-and moisture-preserving road surface as set forth in claim 1, wherein the step of spreading the lime soil comprises:

uniformly spreading the lime on the surface of the plain soil layer according to the designed lime amount, and stirring by adopting a cold recycling mixer;

after stirring, the color of the mixture is uniform and consistent, and the lime metering is rapidly determined by adopting an EDTA titration method;

and (4) transporting the stirred lime soil to the surface layer of the brick slag by using a dump truck, and paving the lime soil by using a land leveler.

8. The method for constructing an environment-friendly water-retaining and moisture-retaining pavement as claimed in claim 1, wherein the step of shaping and rolling after the spreading of the limestone soil comprises: after the lime soil is evenly spread on the surface of the brick slag, a road roller is used for carrying out slight shock rolling within the whole width of the structural layer, and the rolling wheels are overlapped 1/3 for the width of the previous wheel.

9. The method for constructing an environment-friendly water-retaining and moisture-retaining pavement as claimed in claim 1, wherein the cemented stone is prepared by a blending method comprising the steps of:

spreading the soil on the leveled gravel layer, and uniformly mixing by using a land leveler, a multi-furrow plough or a multi-tooth harrow;

rolling by using a micro-vibration road roller, wherein the rolling time is 1/3 wheel width of the previous time, watering is supplemented in time in the rolling process, and rolling is carried out for 3-4 times until no obvious wheel mark exists and the material under the wheel is completely stable.

10. The method for constructing an environment-friendly water-retaining and moisture-retaining pavement as claimed in claim 1, wherein the step of laying the steel slag surface layer comprises: after the leveling of the mud-bonded gravel laying is finished, the designed steel slag amount is conveyed and laid on the mud-bonded gravel surface, the designed steel slag amount is fully flattened by a grader, and the designed steel slag amount is fully vibrated and compacted by a road roller to finish the laying.

Technical Field

The invention relates to the technical field of roadbed and pavement structures and construction, in particular to an environment-friendly water-retaining pavement structure and a construction method.

Background

In the traditional construction of roadbed road surface, for example, although the traditional concrete road surface has higher strength and rigidity, the road surface has poor moisture retention and fatigue resistance, a large amount of cement is needed, the concrete road surface with the thickness of 0.2m and the width of 7m is usually constructed, 400 t-500 t of cement and 250t of water are consumed every 1000m, the cement does not contain curing water, a large amount of dust is prevented in the using process, the road surface needs to be frequently and additionally sprayed with water for moisture retention, and great difficulty is brought to the construction of cement supply and water-deficient areas. In the later-stage repairing process, the excavation difficulty is high, the maintenance cost is also high, and the reutilization degree is low. Compared with common asphalt pavement, the invention has the same or even better high-temperature stability, low-temperature crack resistance, fatigue resistance and water stability as the asphalt pavement.

Based on the above problems, technical research is carried out, and a novel construction method for structure water retention and pavement moisture retention by using environment-friendly materials is summarized.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides an environment-friendly water-retention and moisture-retention type pavement structure and a construction method thereof, and provides a construction technical method which is environment-friendly, good in water retention and moisture retention, low in construction cost and high in engineering quality for the pavement structure.

In order to achieve the purpose, the invention adopts the technical scheme that:

the first aspect provides a kind of environmental protection water moisturizing type road surface structure, it includes basic unit, bed course, the surface course that comprises brick sediment, mud-bonded rubble, slag in proper order.

The further improvement of the environment-friendly water-retaining moisture-retaining pavement structure is that the base course is positioned at the bottom layer and is a partial roadbed filled with 50 cm-thick brick slag.

The further improvement of the environment-friendly water-retention and moisture-retention type pavement structure is that the cushion layer is positioned in the middle layer and is made of mud-bonded gravels with the thickness of 15 cm.

The further improvement of the environment-friendly water-retention and moisture-retention type pavement structure is that the surface layer is positioned on the top layer and adopts steel slag with the thickness of 10 cm.

In a second aspect, there is provided a method for constructing an environment-friendly water-and moisture-retaining pavement, comprising the steps of:

excavating a roadbed and processing a base;

performing brick slag replacement and filling in the excavated roadbed;

spreading lime soil on the surface layer of the brick slag after the replacement and filling, and shaping and rolling;

paving mud-bonded gravel on the shaped lime soil;

and paving a steel slag surface layer on the paved mud-bonded macadam.

The construction method of the environment-friendly water-retaining moisture-retaining pavement is further improved in that brick slag is replaced and filled in two layers;

sorting and replacing the first layer of brick slag when replacing the first layer of brick slag, filling the brick blocks with large grain size to the soft soil surface by an excavator, filling the joints of the stone blocks with small grain size, leveling the local unbalanced positions by fine scraps in a matching way, rolling and leveling by a road roller, burying a settlement observation point in the surface, actually measuring the elevation of the settlement observation point, performing slight shock rolling by the same type of road roller again, measuring the settlement amount within 8mm after compaction, and backfilling the second layer of brick slag;

and after the second layer of brick slag is completely replaced, leveling by using site machinery.

The method for constructing the environment-friendly water-retaining and moisture-retaining pavement is further improved in that the step of spreading the lime soil comprises the following steps:

uniformly spreading the lime on the surface of the plain soil layer according to the designed lime amount, and stirring by adopting a cold recycling mixer;

after stirring, the color of the mixture is uniform and consistent, and the lime metering is rapidly determined by adopting an EDTA titration method;

and (4) transporting the stirred lime soil to the surface layer of the brick slag by using a dump truck, and paving the lime soil by using a land leveler.

The further improvement of the construction method of the environment-friendly water-retaining moisture-retaining pavement is that the step of shaping and rolling after the spreading of the lime soil is finished comprises the following steps: after the lime soil is evenly spread on the surface of the brick slag, a road roller is used for carrying out slight shock rolling within the whole width of the structural layer, and the rolling wheels are overlapped 1/3 for the width of the previous wheel.

The further improvement of the construction method of the environment-friendly water-retaining moisture-retaining pavement is that the mud-bonded macadam is prepared by adopting a mixing method, and the method comprises the following steps:

spreading the soil on the leveled gravel layer, and uniformly mixing by using a land leveler, a multi-furrow plough or a multi-tooth harrow;

rolling by using a micro-vibration road roller, wherein the rolling time is 1/3 wheel width of the previous time, watering is supplemented in time in the rolling process, and rolling is carried out for 3-4 times until no obvious wheel mark exists and the material under the wheel is completely stable.

The further improvement of the construction method of the environment-friendly water-retaining moisture-retaining pavement is that the step of laying the steel slag surface layer comprises the following steps: after the leveling of the mud-bonded gravel laying is finished, the designed steel slag amount is conveyed and laid on the mud-bonded gravel surface, the designed steel slag amount is fully flattened by a grader, and the designed steel slag amount is fully vibrated and compacted by a road roller to finish the laying.

Due to the adoption of the technical scheme, the invention can obtain the following beneficial effects:

the invention provides a construction method of a novel environment-friendly material for a water-retaining and moisture-retaining roadbed and pavement. The base layer, the cushion layer and the surface layer of the roadbed and the pavement are sequentially composed of brick slag, cemented rubbles and steel slag. The brick slag has good improvement effect on the soft roadbed with high water content; the mud-bonded macadam has strong cohesive force and high plasticity index, and the thin layer can be used as a good force transmission transition layer; the steel slag has high strength and good wear resistance, and is a good environment-friendly novel pavement material. Compared with the prior asphalt and concrete road surface, the method of the invention not only has higher road surface strength, better durability and lower manufacturing cost, but also has great significance for building waste reclamation, resource-saving construction and environment-friendly society.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a sectional view of an environmentally friendly, water-retaining and moisture-retaining pavement structure according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1, an embodiment of the present invention provides an environment-friendly water-retaining pavement structure, in which a base layer, a cushion layer, and a surface layer of a roadbed and a pavement are sequentially composed of brick slag 11, cemented stone 12, and steel slag 13. The brick slag has good improvement effect on the soft roadbed with high water content; the mud-bonded macadam has strong cohesive force and high plasticity index, and the thin layer can be used as a good force transmission transition layer; the steel slag has high strength and good wear resistance, and is a good environment-friendly novel pavement material. Compared with the prior asphalt and concrete road surface, the method has the advantages of higher road surface strength, better durability and lower manufacturing cost, and has great significance for the reclamation of construction wastes, the conservation of construction resources and the environment-friendly society.

In recent years, the development of the steel industry and the construction industry is rapidly developed, the resource consumption, the industrial and construction waste yield are increased, and a large amount of accumulation not only occupies public land resources, but also pollutes the ecological environment.

At present, most of steel slag is treated by re-extracting and recycling the steel slag through physical, chemical, thermal activation and complex processes; and the brick slag is crushed by a large crushing machine and then is used by machine selection.

The existing treatment mode not only adds processing cost but also has low overall utilization rate; the asphalt pavement and the concrete pavement have the advantages of large resource consumption, higher construction cost, poor pavement moisture retention, fussy later maintenance process, higher maintenance cost and low material recycling degree; the invention provides a construction technical method with environmental protection, good water retention and moisture retention, low construction cost and high engineering quality for a pavement structure.

Research shows that brick slag and steel slag are industrial wastes generated in large quantities in the production process of the building industry and the industrial industry, and account for a considerable proportion of the total wastes of the respective industries. The brick slag used as a cushion layer has good rigidity, stability and water retention property, and can greatly improve the mechanical property of the roadbed. And the brick slag filled roadbed can effectively reduce the water content of the foundation, is beneficial to compaction of the foundation, accelerates settlement of the foundation during construction and is beneficial to shortening the construction period. The mud-bonded gravel is a common pavement paving material, generally consists of clay and gravel, has high plasticity index and strong cohesive force, can be used as a good force transmission transition layer by a thin layer, and has the characteristic of good grading improvement. The steel slag is a solid waste discharged in a large amount in the process of smelting iron and steel, is a hard material formed by condensing in air and compounded by ores, fuels and fluxing agents in the process of smelting pig iron in a blast furnace, and has high strength and good wear resistance; can form a compact framework on the road surface and has good anti-rutting deformation capability.

From this environmental protection moisturizing type road surface structure does: the bottom layer is a part of roadbed filled with brick slag with the thickness of 50cm, the middle layer is formed by mud-bonded broken stones with the thickness of 15cm, and the surface layer is formed by steel slag with the thickness of 10cm, as shown in figure 1.

The embodiment of the invention also provides a method for constructing the environment-friendly water-retaining and moisture-retaining pavement, which comprises the following steps:

excavating a roadbed and processing a base;

performing brick slag replacement and filling in the excavated roadbed;

spreading lime soil on the surface layer of the brick slag after the replacement and filling, and shaping and rolling;

paving mud-bonded gravel on the shaped lime soil;

and paving a steel slag surface layer on the paved mud-bonded macadam.

Specifically, the construction process flow and the operation key points of the construction method of the environment-friendly water-retaining and moisture-retaining pavement are as follows:

the construction process flow comprises the following steps: working face treatment → roadbed excavation and base treatment → first layer brick slag replacement and filling (thickness 25cm), shaping, light pressing → backfilling second layer brick slag (thickness 25cm) → spreading lime soil → shaping, rolling → paving of mud-bonded gravel (thickness 15cm) → paving of steel slag surface layer (10cm), shaping and rolling.

(1) And (3) working surface treatment: the construction method comprises the following steps of firstly cleaning a construction area, and removing humus soil, soft soil layers and poor soil on the surface layer.

(2) Road bed excavation and foundation treatment: and after the excavation is carried out to the designed elevation, removing sundries in the base, and then leveling and compacting the base.

(3) Replacing and filling the first layer of brick slag: when the replacement and filling are carried out, the separation and replacement are carried out, namely, the digging machine fills the brick blocks with large particle size to the soft soil surface, then the filling is carried out on the stone blocks with small particle size, the thickness of the first layer is controlled to be about 25cm, the local unbalanced position is leveled by fine scraps in a matching manner, the digging machine is used for rolling and leveling back and forth after the area is finished, and the replacement and filling range is gradually expanded. And (3) after leveling is finished, rolling back and forth by using a mechanical crawler until no obvious sinking exists, and rolling by using a road roller (a too heavy compaction machine cannot be used for avoiding crushing brick slag).

And after the rolling of the road roller is finished, burying a settlement observation point on the surface of the road roller, actually measuring the elevation of the settlement observation point, performing slight shock rolling again by using the road roller with the same model, measuring after the compaction, and backfilling the second layer of brick slag, wherein the settlement is less than 8 mm.

(4) And replacing and filling the second layer of brick slag: after the second layer brick sediment is filled and is accomplished, utilize place machinery to carry out the flattening earlier, strictly forbid the road roller before spreading lime soil and roll the operation, make the crushing of top layer brick sediment easily, cause the top surface closely knit, the lower part void phenomenon appears.

(5) Spreading lime soil: uniformly spreading the lime on the surface of the plain soil layer according to the designed lime amount, and turning and stirring the lime by using a cold recycling mixer. After the stirring is finished, the color of the mixture is uniform and consistent, no gray strips or flower surfaces exist, no pits or belts of coarse and fine particles exist, the lime metering is rapidly determined by adopting an EDTA titration method, the stirred lime soil is conveyed to the surface layer of the brick residue by using a dump truck, and the lime soil is paved by using a land leveler.

(6) Shaping and rolling: uniformly paving lime soil on the surface of the brick slag, and performing slight shock rolling in the whole width of the structural layer by using a road roller, wherein the rolling wheel is overlapped 1/3 for the width of the previous wheel; the lime soil can fill gaps, the structural compactness is improved, and the later-stage integral strength can be improved.

(7) Paving the mud-bonded gravel: the mud-bonded gravel adopts a mixing method: spreading soil on the leveled gravel layer, uniformly mixing with a land leveler, a multi-share plough or a multi-tooth harrow, rolling by using a micro-vibration road roller, wherein the rolling wheel is overlapped 1/3 for the width of the previous wheel, watering is required to be timely supplemented in the rolling process, and the rolling is carried out for 3-4 times until no obvious wheel trace exists and the material under the wheel is completely stable.

(8) Paving a steel slag surface layer: and after paving and leveling the mud-bonded gravel, conveying the designed amount of the steel slag and paving the steel slag on the surface of the mud-bonded gravel, and fully flattening the mud-bonded gravel by using a grader. And (5) fully vibrating and compacting by using a road roller to finish paving.

The environment-friendly water-retaining moisture-retaining pavement structure disclosed by the invention not only actively responds to the concept of ecological environment protection and green sustainable development of enterprises in the current society and changes the theory into practice, but also is simple in construction process and easy to master; the construction quality is good, and the later maintenance cost is low; the adopted building brick slag and smelting steel slag are all the construction industry waste materials, the construction cost is low, and the construction technology which is worth to be widely popularized is realized even if the consideration is carried out in multiple dimensions.

Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.