阅读说明：本技术 一种场道道面混凝土施工方法 (Concrete construction method for field road pavement ) 是由 刘晶 连林 沈嘉俊 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种场道道面混凝土施工方法,涉及场道施工技术领域,其包括以下步骤：模板支设,校模,摊铺,振捣,整平,混凝土做面,接缝施工,混凝土养护,模板拆除及切灌缝；混凝土做面工艺中采用拉毛和刻槽工艺相结合的方式,保证道面的粗糙度,拉毛时在毛刷前有一定厚度砂浆,但不积聚,且能均匀地铺在混凝土表面为最佳时机,或以手指按压混凝土表面起痕,但又不粘浆为宜；刻槽深度在跑道和快速出口联络道道面处的纹理深度为0.8-1.0mm,其他部位道面纹理深度为0.3-0.6mm,槽宽度为3mm-6mm,槽间距为25-38mm,且槽间距相等。本发明具有增强场道道面防滑度和耐久性的效果。(The invention discloses a concrete construction method for a field road surface, which relates to the technical field of field road construction and comprises the following steps: erecting a template, correcting the template, paving, vibrating, leveling, facing concrete, constructing a joint, curing the concrete, dismantling the template and cutting and pouring the joint; the concrete surface making process adopts a mode of combining the roughening process and the grooving process, so that the roughness of the road surface is ensured, mortar with a certain thickness is arranged in front of a brush during roughening, but the mortar is not accumulated, and the mortar can be uniformly paved on the concrete surface at the best time, or the concrete surface is pressed by fingers to form marks, but the mortar is not adhered; the texture depth of the notch groove at the runway and the rapid exit connecting runway surface is 0.8-1.0mm, the texture depth of the runway surface at other parts is 0.3-0.6mm, the groove width is 3-6mm, the groove spacing is 25-38mm, and the groove spacing is equal. The invention has the effect of enhancing the skid resistance and durability of the field pavement.)

1. A method for constructing concrete on a pavement of a field is characterized by comprising the following steps:

step 1: the template supporting template adopts a steel-wood combined template, the form is a female tongue-and-groove, and the poured concrete is a male tongue-and-groove;

step 2: before the concrete mixture is put into a warehouse, the formwork is corrected, and the spacing width, the elevation, the support stability, the flatness and the humidity of the base layer, the arrangement position of the reinforcing mesh and the dowel bar device are comprehensively checked;

and step 3: spreading, namely firstly, sprinkling water to wet a stone chip leveling layer, and rolling or tamping the stone chip leveling layer, then spreading concrete, wherein the compaction settlement degree is reserved during spreading, so that the spreading plane is 15-20% higher than the thickness of the template;

and 4, step 4: vibrating corners and tongue-and-groove positions of a vibrating concrete plate and positions provided with reinforcing meshes and dowel bars by using an inserted vibrator, assisting the vibration of irregular positions by using a flat vibrator, and preferably stopping the sinking of the mixed material and avoiding bubbles overflowing the surface to form slurry during the vibration duration of the vibrator at each position;

and 5: leveling to ensure the thickness and uniformity of the pavement concrete surface layer mortar, repeatedly carrying out static pressure and dynamic pressure on the pavement concrete by adopting a roller press, and timely removing the template top surface mortar during leveling to ensure the pavement surface layer flatness;

step 6: the concrete pavement surface is roughened and grooved, the roughness of the pavement surface is guaranteed, mortar with a certain thickness is arranged in front of the brush during roughening, the mortar is not accumulated, and the mortar can be uniformly paved on the concrete surface at the best time, or the concrete surface is pressed by fingers to form marks, but the mortar is not adhered; the texture depth of the notch groove at the runway and the rapid exit connecting road surface is 0.8-1.0mm, and the texture depth of the other part road surface is 0.3-0.6 mm;

and 7: the joint construction adopts the construction joints of the dowel bars, the positions of the construction joints are matched with the designed sub-bins, the adjacent construction joints are not on the same section, and the arranged dowel bars are vertical to the joint walls and are not warped or inclined;

and 8: the concrete curing is to improve the dry period strength of the concrete, facilitate cutting seams and removing molds and reduce surface microcracks, and when the upper surface of the concrete begins to condense, 400g/m2 thick non-woven fabric is adopted to replace gunny bag sheets for curing;

and step 9: the time for removing the template and cutting the crack and the seam is controlled to be 3-6 hours after the concrete is finally set, the temperature is properly prolonged when the temperature is low, the width of the seam is 4mm, powder in the seam is removed before the seam is poured, and the filling material is applied after the inside of the seam is dry and clean.

2. The method for constructing concrete for a pavement according to claim 1, wherein: and (3) in the step (1), the connecting seam of the template uses a wood filler strip, the filler strip is flush with the inner side of the wood template, and the thickness of the wood filler strip is 10 mm.

3. The method for constructing concrete for a pavement according to claim 1, wherein: and (3) sealing the lower edge of the template in the step (1) by using mortar or plugging by using felt, and caulking the joint of the template by using putty.

4. The method for constructing concrete for a pavement according to claim 1, wherein: in the step 3, manual stirring is carried out in time in the paving process, namely, large broken stones are uniformly scattered into the fine materials, and the template and the rabbet part are firstly buckled with some fine materials by using a shovel.

5. The method for constructing concrete for a pavement according to claim 1, wherein: in the step 5, after the operation of the roller press is finished, the roller can be used for further slurry lifting and leveling according to the conditions of the operation surface, weather and the like, and when leveling is performed, the thinner mixture in the original concrete mixture can be used, the roller is firstly rolled back and forth for 2 to 4 times, then the roller is fixed and dragged for two times, and finally the roller is rolled for 4 to 6 times.

6. The method for constructing concrete for a pavement according to claim 1, wherein: and 6, during the hair-drawing operation in the step 6, a guiding rule is placed in the direction vertical to the longitudinal seam of the concrete plate, the hairbrush is drawn along the guiding rule at a constant speed, and the hairbrush cannot stop or vibrate midway during hair-drawing.

7. The method for constructing concrete for a pavement according to claim 1, wherein: in the step 6, a special notching machine is adopted for notching, firstly, a white line is popped up on the concrete plate according to the determined width of the notching machine, two guide wheels are always aligned to the white line during notching, the notching operation is formed by one-time cutting, the pause on the road surface is avoided, so that the change of double grooves or the depth of the grooves is prevented, waste materials generated in the notching process can be flushed away by water or sucked away in vacuum, the waste materials are not allowed to be discharged into an airport rainwater or sewage discharge system, and the positions which cannot be notched or have insufficient depth of the notches are partially carved by a hand grinder.

8. The method for constructing concrete for a pavement according to claim 7, wherein: in the step 6, the width of the grooves is 3-6mm, and the distance between the grooves is 25-38 mm.

Technical Field

The invention relates to the technical field of field road construction, in particular to a field road surface concrete construction method.

Background

The airport runway system is the most basic and important component of an airport, a runway surface is mostly made of cement concrete, and the performance of the airport runway surface can directly influence the passing of airplanes and the overall management of the airport.

The pavement concrete is paved in an open-air environment in a large area, and bears the long-term damage effects of climate and environment, such as repeated temperature strain, dry-wet cycle, freeze-thaw cycle and the like, the skid resistance of the pavement is reduced in the long-term use process, when the local damage occurs, the repair is needed, the overall management and operation of an airport are affected, and otherwise, potential safety hazards exist.

Disclosure of Invention

The invention aims to provide a concrete construction method for a pavement of a field, which has the advantages of enhancing the skid resistance and the durability of the pavement of the field.

The above object of the present invention is achieved by the following technical solutions:

step 1: the template supporting template adopts a steel-wood combined template, the form is a female tongue-and-groove, and the poured concrete is a male tongue-and-groove;

step 2: before the concrete mixture is put into a warehouse, the formwork is corrected, and the spacing width, the elevation, the support stability, the flatness and the humidity of the base layer, the arrangement position of the reinforcing mesh and the dowel bar device are comprehensively checked;

and step 3: spreading, namely firstly, sprinkling water to wet a stone chip leveling layer, and rolling or tamping the stone chip leveling layer, then spreading concrete, wherein the compaction settlement degree is reserved during spreading, so that the spreading plane is 15-20% higher than the thickness of the template;

and 4, step 4: vibrating corners and tongue-and-groove positions of a vibrating concrete plate and positions provided with reinforcing meshes and dowel bars by using an inserted vibrator, assisting the vibration of irregular positions by using a flat vibrator, and preferably stopping the sinking of the mixed material and avoiding bubbles overflowing the surface to form slurry during the vibration duration of the vibrator at each position;

and 5: leveling to ensure the thickness and uniformity of the pavement concrete surface layer mortar, repeatedly carrying out static pressure and dynamic pressure on the pavement concrete by adopting a roller press, and timely removing the template top surface mortar during leveling to ensure the pavement surface layer flatness;

step 6: the concrete pavement surface is roughened and grooved, the roughness of the pavement surface is guaranteed, mortar with a certain thickness is arranged in front of the brush during roughening, the mortar is not accumulated, and the mortar can be uniformly paved on the concrete surface at the best time, or the concrete surface is pressed by fingers to form marks, but the mortar is not adhered; the depth of the texture of the notch groove on the runway and the rapid exit connecting road surface is 0.8-1.0mm, and the depth of the texture of the road surface at other positions is 0.3-0.6 mm.

And 7: the joint construction adopts the construction joints of the dowel bars, the positions of the construction joints are matched with the designed sub-bins, the adjacent construction joints are not on the same section, and the arranged dowel bars are vertical to the joint walls and are not warped or inclined;

and 8: the concrete curing is to improve the dry period strength of the concrete, facilitate cutting seams and removing molds and reduce surface microcracks, and when the upper surface of the concrete begins to condense, 400g/m2 thick non-woven fabric is adopted to replace gunny bag sheets for curing.

And step 9: the time for removing the template and cutting the crack and the seam is controlled to be 3-6 hours after the concrete is finally set, the temperature is properly prolonged when the temperature is low, the width of the seam is 4mm, powder in the seam is removed before the seam is poured, and the filling material is applied after the inside of the seam is dry and clean.

The invention is further configured to: and (3) in the step (1), the connecting seam of the template uses a wood filler strip, the filler strip is flush with the inner side of the wood template, and the thickness of the wood filler strip is 10 mm.

Through adopting above-mentioned technical scheme, guarantee that the template is connected closely, smoothly-going, prevent to have the phenomenon such as crack, dislocation and height unevenness, the joint-cutting of being convenient for of wood battens thickness link up, prevents to be in place because of template edge joint-cutting, angle modulation when concrete slab breaks.

The invention is further configured to: and (3) sealing the lower edge of the template in the step (1) by using mortar or plugging by using felt, and caulking the joint of the template by using putty.

By adopting the technical scheme, the sealing performance is enhanced, and the honeycomb pitted surface is prevented from being formed at the edge of the concrete plate due to slurry leakage.

The invention is further configured to: in the step 3, manual stirring is carried out in time in the paving process, namely, large broken stones are uniformly scattered into the fine materials, and the template and the rabbet part are firstly buckled with some fine materials by using a shovel.

By adopting the technical scheme, the concrete can be effectively prevented from segregation.

The invention is further configured to: in the step 5, after the operation of the roller press is finished, the roller can be used for further slurry lifting and leveling according to the conditions of the operation surface, weather and the like, and when leveling is performed, the thinner mixture in the original concrete mixture can be used, the roller is firstly rolled back and forth for 2 to 4 times, then the roller is fixed and dragged for two times, and finally the roller is rolled for 4 to 6 times.

Through adopting above-mentioned technical scheme, further adopt the cylinder operation, make the magma on concrete surface level and more even.

The invention is further configured to: and 6, during the hair-drawing operation in the step 6, a guiding rule is placed in the direction vertical to the longitudinal seam of the concrete plate, the hairbrush is drawn along the guiding rule at a constant speed, and the hairbrush cannot stop or vibrate midway during hair-drawing.

By adopting the technical scheme, the fold marks can be properly avoided, and the smoothness and the straightness of the hair groove are ensured.

The invention is further configured to: in the step 6, a special notching machine is adopted for notching, firstly, a white line is popped up on the concrete plate according to the determined width of the notching machine, two guide wheels are always aligned to the white line during notching, the notching operation is formed by one-time cutting, the pause on the road surface is avoided, so that the change of double grooves or the depth of the grooves is prevented, waste materials generated in the notching process can be flushed away by water or sucked away in vacuum, the waste materials are not allowed to be discharged into an airport rainwater or sewage discharge system, and the positions which cannot be notched or have insufficient depth of the notches are partially carved by a hand grinder.

By adopting the technical scheme, the grooving process is standardized, so that the continuity and the straightness of the grooves can be kept, and the groove parameters after forming can be more accurate.

The invention is further configured to: in the step 6, the width of the grooves is 3-6mm, and the distance between the grooves is 25-38 mm.

By adopting the technical scheme, the groove parameter is one of important factors influencing the skid resistance of the grooved pavement, and the durability of the groove directly determines the service life of the asphalt pavement; under the same grooving area, when the groove width is unchangeable, the reduction interval is favorable to the antiskid, when the groove interval is unchangeable, increases the groove width, can improve the cling compound performance, synthesizes and compares, chooses for use suitable parameter in reasonable range according to actual conditions.

In conclusion, the beneficial technical effects of the invention are as follows:

the construction method of the field pavement strictly follows specific construction procedures, and ensures the compactness and the flatness of the field pavement in the processes of paving, vibrating and leveling, ensures the roughness of the surface of the field pavement in a mode of combining roughening and grooving processes in the process of making the field pavement, and enhances the skid resistance and the durability of the field pavement in use.

Drawings

Figure 1 is a schematic illustration of the construction of a retaining form according to one embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention discloses a concrete construction method for a pavement of a field, which comprises the following steps:

s1: erecting a template; s2: calibrating a mold; s3: spreading; s4: vibrating; s5: leveling: s6: making a concrete surface; s7: constructing a joint; s8: curing the concrete; s9: and (5) removing the template and cutting and pouring seams.

Referring to fig. 1, in step 1, a steel-wood combined template is adopted as a template, the form is a female rabbet, poured concrete is a male rabbet, in the erecting process, a bin dividing line is designed on a pavement base layer according to pavement concrete, drilling holes in the base layer are adopted for erecting a template, steel rods are drilled, the template is fixed by using adjustable draw hooks, the template plane is ensured to be accurate and firm, wood pad strips are used for template connecting joints, and the wood pad strips are flush with the inner side of the template, so that the template is ensured to be compact and smooth, and phenomena such as gap, dislocation, unevenness and the like cannot occur. The thickness of the wood gasket is 10mm, so that the joint is conveniently penetrated, and the angle adjustment is prevented when the concrete slab is broken because the joint at the edge of the template is not in place; in order to prevent the honeycomb pitted surface of the edge of the concrete plate caused by slurry leakage, the lower edge of the template is sealed by mortar or blocked by asphalt felt, and the joint of the template is caulked by putty. After the formwork is erected, self-checking is needed, relevant data are filled in, and concrete pouring construction is carried out after rechecking.

In step 2, before the concrete mixture is put into a warehouse, the spacing width, the elevation, the support stability, the flatness and the humidity of the base layer, the arrangement position of the reinforcing mesh, the dowel bar device and the like of the template are comprehensively checked.

And 3, sprinkling water to wet the stone chip leveling layer before paving, and rolling, twisting and compacting by using a double-steel-wheel road roller. Paving is carried out by manually pressing the plate edges, the plate corners and the rear plate in sequence, manual stirring is needed in time in the paving process, large broken stones are uniformly scattered into fine materials, and the template and the rabbet part can be firstly buckled with some fine materials by a spade; the compaction settlement degree should be reserved during paving, and the virtual height is generally considered to be 15-20% of the thickness of the plate (which can also be determined by trial construction); in the spreading process, if rain appears, a rainproof shed is immediately erected in a poured section, the rest construction sequence is completed in the shed, an interphone is used for being in contact with a mixing station in time, and arrangement for stopping construction (sealing) is made.

In step 4, when a high-frequency vibrating bar unit is adopted for vibrating, the corners, the rabbet parts and the parts provided with the reinforcing mesh and the dowel bars of the concrete slab are vibrated by using an inserted vibrator (the vibration frequency is not lower than 12000 times/minute), the irregular parts are vibrated by assisting with a flat vibrator, the vibration duration of each position of the vibrator is proper to ensure that the mixed material stops sinking and no bubbles overflow the surface to form slurry, and the vibration is not proper to ensure the time, so that the mortar is not too easy to vibrate, and the mortar is prevented from being concentrated.

And 5, in order to ensure the thickness and uniformity of mortar of the pavement concrete surface layer, improve the construction quality of the pavement surface layer and ensure the flatness, a three-roller leveling machine is adopted for leveling in construction, a paving worker needs to cooperate with the three-roller machine for operation, the paving worker timely shovels the mortar piled up before the compaction roller and the redundant concrete materials and forwards the mortar and the redundant concrete materials, the mortar is not accurately used for filling the low-lying part, and the thin concrete is used for filling the low-lying part. Static pressure is carried out for 2 times and dynamic pressure is carried out for 6-8 times by a three-roller machine. And then carrying out static pressure for 2 times to ensure that the aggregate on the upper surface of the concrete is uniformly distributed, the density and the surface mortar are uniform, and the surface quality is ensured. After the leveling procedure is finished, the roller can be used for further pulp lifting and leveling according to the conditions of the operation surface, the weather and the like. During leveling, the thinner mixture in the original concrete mixture is allowed to be used, the mortar or the dry cement powder is strictly forbidden to be used, the mixture is firstly rolled back and forth for 2-4 times, then the fixed roller is horizontally dragged for two times, and finally the mixture is rolled for 4-6 times, so that the surface emulsion is more even and uniform.

In step 6, after finishing the plastering treatment of the concrete pavement, in order to ensure the roughness of the pavement, a mode of combining roughening and grooving processes is adopted in this embodiment.

The timing of napping is related to factors such as air temperature, wind power and slump of the mixture. If the galling is too early, the phenomena of stone exposure and groove-shaped flowing healing are easy to occur, and the roughness requirement cannot be met, and if the galling is too late, the required texture depth cannot be met. When in napping, mortar with a certain thickness (3-5 mm) is arranged in front of the brush, but the mortar is not accumulated, and the mortar can be uniformly paved on the surface of concrete at the best napping time, or fingers can be used for pressing the surface of the concrete to mark, but the mortar is not stuck. At this time, the roughening can ensure the surface texture to be uniform and the roughness required by the design can be easily achieved. In the napping operation, in order to ensure the smoothness and straightness of the hair groove, a guiding rule is placed in the direction perpendicular to the longitudinal seam of the plate, the hair brush is uniformly pulled along the guiding rule, and in order to avoid the occurrence of creases, the hair brush cannot stop or vibrate midway during napping. The cement paste adhered to the brush is often cleaned during napping so as to ensure that the groove edge is smooth.

The grooving adopts the construction of dedicated grooving machine, and the groove parameter can lead to the fact direct influence to scene way pavement antiskid, durability, and the groove parameter includes cell type, groove width, groove depth, groove interval and groove trend etc. adopts the rectangular channel in this embodiment, and the groove is to being horizontal groove, and the groove width is 3-6mm, and the groove interval is 25-38mm and is the equidistance groove, and the texture depth of groove depth in runway and quick export contact road pavement department is 0.8-1.0mm, and other positions road surface texture depth is 0.3-0.6 mm. In the grooving process, firstly, a white line is sprung on a concrete plate according to the determined width of a grooving machine, two guide wheels are always aligned to the white line during grooving, grooving operation is formed by one-time cutting, the stop on a road surface is avoided, the change of double grooves or groove depth is prevented, waste materials generated in the grooving process can be washed away by water or sucked away in vacuum, the waste materials are not allowed to be discharged into an airport rainwater or sewage discharge system, and partial engraving is needed at positions which cannot be engraved or are insufficient in grooving depth by a hand grinder.

In step 7, the construction joint adopts a construction joint of a dowel bar, and the position of the construction joint is matched with the designed sub-bin. The adjacent construction joints are not in the same section, and the arranged dowel bars are vertical to the joint walls and are not warped or inclined. After the plug plate is removed, it is protected. In the expansion joint, the expansion joint of the road surface and the 16cm thick road shoulder is constructed by adopting a vertical mold. The shoulder expansion joint with the thickness of 12cm is embedded by mechanical sawing. The concrete pavement and shoulder expansion joint plate is made of high-pressure polyethylene closed-cell plastic foam plate.

In step 8, in order to improve the dry period strength of the concrete, facilitate cutting seams and removing molds and reduce surface microcracks, 400g/m2 thick non-woven fabric is adopted to replace gunny bag sheets for maintenance when the concrete upper surface begins to be condensed. The curing period is not less than 14 days. This work is carried out to ensure that the road surface remains wet throughout the curing period. During the maintenance process, the slurry is timely cleaned and covered after the cutting seam is cut.

In step 9, the time for removing the formwork is determined according to the temperature and the concrete strength increase condition, and asphalt is coated on the wall of the pavement slab immediately after the formwork is removed, so that no white color is exposed. The cutting time is controlled to be 3-6 hours after the concrete is finally solidified, the air temperature is properly prolonged when the air temperature is low, the multiplication of the time and the temperature after pouring is not less than 300 ℃ per hour under the general condition, the cutting does not disturb the internal structure, the edge punching or the internal injury is avoided, the irregular crack on the concrete can be reduced, the cutting seam width is 4mm, and the seam is tightly embedded and plugged by a foam plastic rope after the cutting seam is cut, so that the sand, the stone and the sundries are prevented from entering and damaging the corners.

The joint filling material is constructed by adopting a cold filling method. The pouring depth is 3cm, and when the depth of the slot is more than 3cm, a foam plastic rope can be filled in the slot to be used as a substrate material. The surface of the pouring material is slightly lower than the surface of the concrete slab. Before crack pouring, the crack cleaning machine is used for thoroughly cleaning sundries in the crack and dust on the wall of the crack, and the air compressor is used for blowing the sundries out of the crack through high pressure, so that a clean and dry opening in the crack is ensured. The filling of the joint compound must be done in a dry state in the slot, and the joint compound should be full and uniform, adhere tightly to the wall of the alkaline slot and be impermeable to water.

After the above steps are completed, the subsequent protection measures, such as frost heaving prevention and corrosion prevention, should be made. The construction water control is enhanced, rainwater is drained in time, and the higher part of the underground water adopts a precipitation measure, so that adverse factors of frost heaving caused by people are reduced as much as possible; the management of the crack pouring construction is enhanced, the quality of the crack pouring is improved, and frost heaving caused by rainwater flowing into the foundation from the pavement crack is avoided.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.