CN111648185A - Construction method for external connection road of mobile town - Google Patents

Construction method for external connection road of mobile town Download PDF

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Publication number
CN111648185A
CN111648185A CN202010533287.XA CN202010533287A CN111648185A CN 111648185 A CN111648185 A CN 111648185A CN 202010533287 A CN202010533287 A CN 202010533287A CN 111648185 A CN111648185 A CN 111648185A
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China
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road
rolling
pressing
layer
construction
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Inventor
张亚宁
林禄军
张小龙
王德伟
王方
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Sinohydro Engineering Bureau 4 Co Ltd
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Sinohydro Engineering Bureau 4 Co Ltd
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Priority to CN202010533287.XA priority Critical patent/CN111648185A/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • E01C3/04Foundations produced by soil stabilisation
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22Machines, 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
    • E01C19/23Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/01Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/18Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/35Toppings or surface dressings; Methods of mixing, impregnating, or spreading them

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses a construction method for an external connection road of a mobile town, which comprises the steps of measurement and setting-out, roadbed construction, subbase construction, cement stabilized macadam base construction and asphalt concrete surface construction. The method of the invention is used for treating the roadbed, and then the construction is carried out according to the structural sequence of the subbase layer, the cement stabilized macadam base layer and the asphalt concrete surface layer, so that the construction quality can be ensured, the road has smooth appearance, no wheel tracks, good joint and good compaction quality, and is suitable for externally connecting roads in the mobile town collections.

Description

Construction method for external connection road of mobile town
Technical Field
The invention belongs to the technical field of road construction, and particularly relates to a construction method for externally connecting roads in a mobile town.
Background
The Jinshajiang white crane beach hydropower station is positioned on a boundary river of Ningnan county in Sichuan province and Qiaojia county in Yunnan province, is 41km away from Qiaojia county, and is the second stage in a Jinshajiang downstream cascade power station. The power station is connected with the Udongde step, the lower adjacent stream ferry step (195 km away from the stream ferry hydropower station), and the area of the drainage basin is controlled to be 43.03 km2(91.0% of the area of the Jinshajiang river basin). Average flow rate of 4190m at dam site for many years3Per s, average annual runoff volume of 1321 hundred million m3. When the normal water storage level of the reservoir is 825m, the horizontal area of the corresponding reservoir is 216.49km2Total reservoir capacity 206.27 hundred million m3Regulating reservoir capacity to 104.36 hundred million m375.00 hundred million meters flood control storage capacity3The length of the return water of the dry flow is about 182km (to the Udongde dam site). The white crane beach hydropower station relates to the settlement project of immigration, and has the difficulties of multiple and wide project points, short construction period, higher coordination work difficulty, high difficulty of construction traffic transportation organization and the like, wherein the establishment of the outside connection road of the town is one of the main projects, so the construction quality requirement of the outside connection road is high. For this reason, it is necessary to develop a high-quality construction method suitable for external connection roads of a mobile town.
Disclosure of Invention
The invention aims to provide a construction method for externally connecting roads in a mobile town.
The object of the invention is achieved by the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, cleaning up miscellaneous soil in the range of the roadbed, excavating drainage ditches at two sides of the roadbed, and rolling the roadbed after drying;
s3, constructing a subbase layer: firstly, paving the broken stones on the roadbed, and then repeating the leveling and rolling processes twice; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is performed for 1 time by adopting a vibratory roller for static pressure, the re-pressing is performed for 1 time by adopting the vibratory roller for weak vibration firstly and then for 4 times by strong vibration, and the final pressing is performed for 1 time by adopting the vibratory roller for static pressure;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; crushed stone with the particle size of not less than 4.75mm and not more than 9.5mm, crushed stone with the particle size of not less than 9.5mm and not more than 19mm, crushed stone with the particle size of not less than 19mm and not more than 31.5mm and gravel are mixed according to the mass ratio of 18-22: 23-27: preparing crushed stone at a ratio of 23-27: 28-32, and preparing a mixture of the crushed stone and the composite portland cement at a mass ratio of 90-110: 3-7; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is static pressure for 1 time by adopting a vibratory roller, the secondary pressing is weak vibration for one time firstly by adopting the vibratory roller, then strong vibration is carried out for 6-8 times, the final pressing is rolling for 2 times by using a rubber wheel roller, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept wet in the rolling process; maintaining the cement stabilized macadam base after rolling;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; and then closing the construction road section and maintaining.
The invention has the beneficial effects that: the method of the invention is used for treating the roadbed, and then the construction is carried out according to the structural sequence of the subbase layer, the cement stabilized macadam base layer and the asphalt concrete surface layer, so that the construction quality can be ensured, the road has smooth appearance, no wheel tracks, good joint and good compaction quality, and is suitable for externally connecting roads in the mobile town collections.
Drawings
FIG. 1 is a schematic view of the construction process of the present invention;
Detailed Description
The invention is further described with reference to the accompanying drawings, but the invention is not limited in any way, and any alterations or substitutions based on the teaching of the invention are within the scope of the invention.
The invention as shown in figure 1 comprises the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, clearing miscellaneous soil in the range of a roadbed, excavating the roadbed, excavating drainage ditches at two sides of the roadbed to prevent water accumulation of the roadbed, rolling the roadbed after air drying, wherein in the rolling process, the wheel tracks of the road roller which runs back and forth must be partially overlapped, compacted to be free of bias voltage and dead angle and uniformly rolled;
s3, constructing a subbase layer: firstly, paving broken stones on a roadbed, and then repeating the leveling and rolling processes twice, wherein the function of the broken stones is to initially form an underlayer and expose potential unevenness; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is performed by adopting a vibratory roller for static pressure for 1 time, the re-pressing is performed by adopting the vibratory roller for weak vibration for 1 time firstly, then strong vibration is performed for 4 times, the final pressing is performed by adopting the vibratory roller for static pressure for 1 time, and the crushed stone is pressed until the surface is flat, compact, free of fine particle concentration, free of sundries and loose phenomena, neat in side lines and free of obvious wheel marks and bulges; wherein the crushed stone is a graded crushed stone mixture;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; crushed stone with the particle size of not less than 4.75mm and not more than 9.5mm, crushed stone with the particle size of not less than 9.5mm and not more than 19mm, crushed stone with the particle size of not less than 19mm and not more than 31.5mm and gravel are mixed according to the mass ratio of 18-22: 23-27: preparing crushed stone at a ratio of 23-27: 28-32, and preparing a mixture of the crushed stone and the composite portland cement at a mass ratio of 90-110: 3-7; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is static pressure for 1 time by adopting a vibratory roller, the secondary pressing is weak vibration for one time firstly by adopting the vibratory roller, then strong vibration is carried out for 6-8 times, the final pressing is rolling for 2 times by using a rubber wheel roller, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept wet in the rolling process; maintaining the cement stabilized macadam base after rolling;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; and then closing the construction road section and maintaining.
Preferably, the loose coefficient of the crushed stone in the step S3 is 1.25-1.35, and the compacted thickness is not less than 10 cm.
Preferably, the driving speed of the initial pressure in the step S3 is 1.5-2.0 km/h, the driving speed of the re-pressure is 2.0-2.5 km/h, and the driving speed of the final pressure is 1.5-2.0 km/h.
Preferably, the method for processing the transverse seam joint of the two operation sections in the step S3 is that the transverse seam joint is subjected to lapping and mixing, and after the previous operation section is mixed, 5-8 m is left for non-rolling; when the construction of the next operation section is carried out, the part which is left by the previous operation section and is not pressed is added with water again for mixing, and is rolled together with the next operation section; and step S3, when the belt dividing operation is carried out along the width of the operation section, the materials are mixed and rolled alternately for 3-4 times within the range of 1m on the left side of the joint and 1m on the right side of the joint.
Preferably, in the step S4, the straight line and the flat curve segment without the super high are rolled from the two side shoulders to the center of the road, and the flat curve segment with the super high is rolled from the inside shoulder to the outside shoulder.
Preferably, when rolling is performed in the step S4, the driving speed of initial pressing is 1.5-1.7 km/h, the driving speed of re-pressing is 1.5-1.7 km/h, and the driving speed of final pressing is 2.0-2.5 km/h.
Preferably, the processing method of the joint of the two operation sections constructed on the same day in the step S4 is that after the previous operation section is mixed and shaped, 5-8 m is left for not rolling, and when the next operation section is constructed, the unpressurized part of the previous operation section is left to be added with cement for re-mixing and is rolled together with the next operation section.
Preferably, in the step S4, the last operation section end seam processing method after daily construction is that a groove transversely penetrating through the cement stabilized macadam foundation is dug at the rolled end, the groove width is 30cm, the bottom of the groove is dug to the top surface of the subbase, the groove is perpendicular to the center line of the road, one surface of the groove facing the operation section is a vertical surface, two square timbers are placed in the groove and tightly attached to the vertical surface, the thickness of the square timbers is equal to the compaction thickness, and the length of the square timbers is half of the width of the cement stabilized macadam foundation; and during operation on the next day, after the adjacent operation sections are mixed, removing the square timber, backfilling the groove by using the mixture, manually performing supplementary mixing on the part close to the part of the square timber which is not mixed, and enabling the mixture at the joint to be 5cm higher than the finished section when the square timber is leveled.
Preferably, the asphalt mixture in the step S5 is obtained by uniformly mixing asphalt, coarse aggregate, fine aggregate and filler according to the mass ratio of 105-110: 1360-1390: 840-850: 67-71, wherein the coarse aggregate is broken stone with the particle size of 4.75mm and less than or equal to 16mm, the fine aggregate is broken stone with the particle size of 0mm and less than or equal to 4.75mm, and the filler is limestone powder.
Preferably, the paving of the asphalt mixture in the step S5 is carried out by using a paver, wherein the paving speed 20m before the beginning of the paver is 1m/min, and then the paving speed is 1-3 m/min.
The present invention will be further described with reference to examples 1 to 4.
Example 1
The construction method for externally connecting roads in the mobile town comprises the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, cleaning up miscellaneous soil in the range of the roadbed, excavating drainage ditches at two sides of the roadbed, and rolling the roadbed after drying;
s3, constructing a subbase layer: firstly, paving the broken stone on a roadbed, wherein the loose paving coefficient is 1.25, and then repeating the leveling and rolling processes twice; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the initial pressing is 1.5km/h, the re-pressing is realized by adopting the vibratory roller to perform weak vibration for 1 time firstly and then perform strong vibration for 4 times, the driving speed of the re-pressing is 2.0km/h, the final pressing is realized by adopting the vibratory roller to perform static pressure for 1 time, the driving speed of the final pressing is 1.5km/h and the compaction thickness is 10 cm; the method for treating the transverse seam joint of the two operation sections is that the transverse seam joint is subjected to lapping and mixing, and 5m is left for not rolling after the previous operation section is mixed; when the construction of the next operation section is carried out, the part which is left by the previous operation section and is not pressed is added with water again for mixing, and is rolled together with the next operation section; when the belt-dividing operation is carried out along the width of the operation section, the mixture is mixed and rolled for 3 times in the range of 1m on the left side of the joint and 1m on the right side of the joint in a staggered way;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; crushed stone with the grain diameter of 4.75mm, crushed stone with the grain diameter of 9.51mm, crushed stone with the grain diameter of 19.01mm and gravel are mixed according to the mass ratio of 18: 23: preparing crushed stone at a ratio of 23:28, and preparing a mixture of the crushed stone and the composite portland cement at a mass ratio of 90: 3; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the primary pressing is 1.5km/h, the secondary pressing is realized by adopting the vibratory roller to perform weak vibration for one time firstly and then perform strong vibration for 6 times, the driving speed of the secondary pressing is 1.5km/h, the final pressing is realized by adopting a rubber-tyred roller to perform rolling for 2 times, the driving speed of the final pressing is 2.0km/h, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept moist in the rolling process; maintaining the cement stabilized macadam base after rolling; the straight line and the flat curve section without the super high are rolled from the road shoulders at the two sides to the road center, and the flat curve section with the super high is rolled from the road shoulder at the inner side to the road shoulder at the outer side; the processing method of the joint of the two operation sections constructed on the same day is that after the previous operation section is mixed and shaped, 5m is left for not rolling, and when the next operation section is constructed, the unpressurized part left in the previous operation section is added with cement for mixing again and is rolled together with the next operation section; the end seam processing method of the last operation section after the construction every day is characterized in that a groove transversely penetrating through a cement stabilized macadam base layer is dug at the rolled tail end, the groove width is 30cm, the bottom of the groove is dug to the top surface of the base layer, the groove is vertical to the center line of a road, one surface, facing the operation section, in the groove is a vertical surface, two square timbers are placed in the groove and tightly attached to the vertical surface, the thickness of each square timbers is equal to the compaction thickness, and the length of each square timbers is half of the width of the cement stabilized; during operation on the next day, after the adjacent operation sections are mixed, removing the square timber, backfilling the groove by using the mixture, manually performing supplementary mixing on the part close to the part of the square timber which is not mixed, wherein the mixture at the joint is 5cm higher than the finished section when the square timber is leveled;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; then closing the construction road section and maintaining; wherein the asphalt mixture is obtained by uniformly mixing asphalt, coarse aggregate, fine aggregate and filler according to the mass ratio of 105:1360:840:67, the coarse aggregate is crushed stone with the particle size of 4.76mm, the fine aggregate is crushed stone with the particle size of 0.01mm, and the filler is limestone powder; the asphalt mixture is paved by using a paver, wherein the paving speed of 20m before the beginning of the paver is 1m/min, and then the paving speed is 1 m/min.
Example 2
The construction method for externally connecting roads in the mobile town comprises the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, cleaning up miscellaneous soil in the range of the roadbed, excavating drainage ditches at two sides of the roadbed, and rolling the roadbed after drying;
s3, constructing a subbase layer: firstly, paving the broken stone on a roadbed, wherein the loose paving coefficient is 1.35, and then repeating the leveling and rolling processes twice; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the initial pressing is 2.0km/h, the re-pressing is realized by adopting the vibratory roller to perform weak vibration for 1 time firstly and then perform strong vibration for 4 times, the driving speed of the re-pressing is 2.5km/h, the final pressing is realized by adopting the vibratory roller to perform static pressure for 1 time, the driving speed of the final pressing is 2.0km/h and the compaction thickness is 15 cm; the method for treating the transverse seam joint of the two operation sections is to carry out lapping and mixing on the transverse seam joint, and after the previous operation section is mixed, 8m is left for not rolling; when the construction of the next operation section is carried out, the part which is left by the previous operation section and is not pressed is added with water again for mixing, and is rolled together with the next operation section; when the belt-dividing operation is carried out along the width of the operation section, the mixture is mixed and rolled for 4 times in the range of 1m on the left side of the joint and 1m on the right side of the joint in a staggered way;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; the crushed stone with the grain diameter of 9.5mm, the crushed stone with the grain diameter of 19mm, the crushed stone with the grain diameter of 31.5mm and gravel are mixed according to the mass ratio of 22: 27: 27:32, preparing crushed stone, and preparing a mixture of the crushed stone and the composite portland cement according to a mass ratio of 110: 7; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the primary pressing is 1.7km/h, the secondary pressing is realized by adopting the vibratory roller to perform weak vibration for one time firstly and then perform strong vibration for 8 times, the driving speed of the secondary pressing is 1.7km/h, the final pressing is realized by adopting a rubber-tyred roller to perform rolling for 2 times, the driving speed of the final pressing is 2.5km/h, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept moist in the rolling process; maintaining the cement stabilized macadam base after rolling; the straight line and the flat curve section without the super high are rolled from the road shoulders at the two sides to the road center, and the flat curve section with the super high is rolled from the road shoulder at the inner side to the road shoulder at the outer side; the processing method of the joint of the two operation sections constructed on the same day is that 8m is left for not rolling after the previous operation section is mixed and shaped, and when the next operation section is constructed, the unpressurized part left in the previous operation section is added with cement for mixing again and is rolled together with the next operation section; the end seam processing method of the last operation section after the construction every day is characterized in that a groove transversely penetrating through a cement stabilized macadam base layer is dug at the rolled tail end, the groove width is 30cm, the bottom of the groove is dug to the top surface of the base layer, the groove is vertical to the center line of a road, one surface, facing the operation section, in the groove is a vertical surface, two square timbers are placed in the groove and tightly attached to the vertical surface, the thickness of each square timbers is equal to the compaction thickness, and the length of each square timbers is half of the width of the cement stabilized; during operation on the next day, after the adjacent operation sections are mixed, removing the square timber, backfilling the groove by using the mixture, manually performing supplementary mixing on the part close to the part of the square timber which is not mixed, wherein the mixture at the joint is 5cm higher than the finished section when the square timber is leveled;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; then closing the construction road section and maintaining; wherein the asphalt mixture is obtained by uniformly mixing asphalt, coarse aggregate, fine aggregate and filler according to the mass ratio of 110:1390:850:71, the coarse aggregate is crushed stone with the particle size of 16mm, the fine aggregate is crushed stone with the particle size of 4.75mm, and the filler is limestone powder; the asphalt mixture is paved by using a paver, wherein the paving speed of 20m before the beginning of the paver is 1m/min, and then the paving speed is 3 m/min.
Example 3
The construction method for externally connecting roads in the mobile town comprises the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, cleaning up miscellaneous soil in the range of the roadbed, excavating drainage ditches at two sides of the roadbed, and rolling the roadbed after drying; through detection, the roadbed has good drainage, and the rolled roadbed is uniform, has no bias voltage and dead angle and has good compaction quality;
s3, constructing a subbase layer: firstly, paving the broken stone on a roadbed, wherein the loose paving coefficient is 1.30, and then repeating the leveling and rolling processes twice; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the initial pressing is 1.75km/h, the re-pressing is realized by adopting the vibratory roller to perform weak vibration for 1 time firstly and then perform strong vibration for 4 times, the driving speed of the re-pressing is 2.25km/h, the final pressing is realized by adopting the vibratory roller to perform static pressure for 1 time, the driving speed of the final pressing is 1.75km/h, and the compaction thickness is 13 cm; the method for treating the transverse seam joint of the two operation sections comprises the steps of carrying out lapping and mixing on the transverse seam joint, and reserving 6.5m for non-rolling after the mixing of the previous operation section; when the construction of the next operation section is carried out, the part which is left by the previous operation section and is not pressed is added with water again for mixing, and is rolled together with the next operation section; when the belt-dividing operation is carried out along the width of the operation section, the mixture is mixed and rolled for 3 times in the range of 1m on the left side of the joint and 1m on the right side of the joint in a staggered way; after the step of S3 is finished, the sand filling method is adopted to detect the compaction degree, and the compaction degree is measured according to the volume per 1000m2The detection is carried out in a mode of detecting 3 points, and the detection shows that the surface is flat and compact, no fine particles are concentrated, no sundries and loose phenomena are caused, the side lines are neat, no obvious wheel tracks and bulges exist, and the compaction quality is good;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; crushed stone with the grain diameter of 7.13mm, crushed stone with the grain diameter of 14.25mm, crushed stone with the grain diameter of 25.25mm and gravel are mixed according to the mass ratio of 20: 25: 25:30, preparing crushed stone, and preparing a mixture of the crushed stone and the composite portland cement according to a mass ratio of 100: 5; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the primary pressing is 1.6km/h, the secondary pressing is realized by adopting the vibratory roller to perform weak vibration for one time firstly and then perform strong vibration for 7 times, the driving speed of the secondary pressing is 1.6km/h, the final pressing is realized by adopting a rubber-tyred roller to perform rolling for 2 times, the driving speed of the final pressing is 2.25km/h, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept moist in the rolling process; maintaining the cement stabilized macadam base after rolling; the straight line and the flat curve section without the super high are rolled from the road shoulders at the two sides to the road center, and the flat curve section with the super high is rolled from the road shoulder at the inner side to the road shoulder at the outer side; the processing method of the joint of the two operation sections constructed on the same day is that after the previous operation section is mixed and shaped, 6.5m is left for not rolling, and when the next operation section is constructed, the unpressurized part of the previous operation section is left for adding cement for mixing again and is rolled together with the next operation section; the end seam processing method of the last operation section after the construction every day is characterized in that a groove transversely penetrating through a cement stabilized macadam base layer is dug at the rolled tail end, the groove width is 30cm, the bottom of the groove is dug to the top surface of the base layer, the groove is vertical to the center line of a road, one surface, facing the operation section, in the groove is a vertical surface, two square timbers are placed in the groove and tightly attached to the vertical surface, the thickness of each square timbers is equal to the compaction thickness, and the length of each square timbers is half of the width of the cement stabilized; during operation on the next day, after the adjacent operation sections are mixed, removing the square timber, backfilling the groove by using the mixture, manually performing supplementary mixing on the part close to the part of the square timber which is not mixed, wherein the mixture at the joint is 5cm higher than the finished section when the square timber is leveled; through detection, the appearance is smooth, no wheel mark exists, no pulp turning exists, the surface is uniform and dense, no obvious segregation phenomenon exists, the edges are neat, the lap joint treatment is smooth, and the compaction quality is good;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; then closing the construction road section and maintaining; wherein the asphalt mixture is obtained by uniformly mixing asphalt, coarse aggregate, fine aggregate and filler according to the mass ratio of 107.5:1375:845:69, the coarse aggregate is 10.38mm of crushed stone, the fine aggregate is 2.38mm of crushed stone, and the filler is limestone powder; the paving of the asphalt mixture is carried out by using a paver, wherein the paving speed of 20m before the beginning of the paver is 1m/min, and then the paving speed is 2 m/min; the detection proves that the appearance is smooth, the wheel tracks are avoided, the seam is good, and the compaction quality is good.
Example 4
The construction method for externally connecting roads in the mobile town comprises the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, cleaning up miscellaneous soil in the range of the roadbed, excavating drainage ditches at two sides of the roadbed, and rolling the roadbed after drying; through detection, the roadbed has good drainage, and the rolled roadbed is uniform, has no bias voltage and dead angle and has good compaction quality;
s3, constructing a subbase layer: firstly, paving the broken stone on a roadbed, wherein the loose paving coefficient is 1.30, and then repeating the leveling and rolling processes twice; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the initial pressing is 1.8km/h, the re-pressing is realized by adopting the vibratory roller to perform weak vibration for 1 time firstly and then perform strong vibration for 4 times, the driving speed of the re-pressing is 2.3km/h, the final pressing is realized by adopting the vibratory roller to perform static pressure for 1 time, the driving speed of the final pressing is 1.8km/h, and the compaction thickness is 13 cm; the method for treating the transverse seam joint of the two operation sections is a transverse seam jointThe joints are mixed, and 6.5m is left for non-rolling after the previous operation section is mixed; when the construction of the next operation section is carried out, the part which is left by the previous operation section and is not pressed is added with water again for mixing, and is rolled together with the next operation section; when the belt-dividing operation is carried out along the width of the operation section, the mixture is mixed and rolled for 3 times in the range of 1m on the left side of the joint and 1m on the right side of the joint in a staggered way; after the step of S3 is finished, the sand filling method is adopted to detect the compaction degree, and the compaction degree is measured according to the volume per 1000m2The detection is carried out in a mode of detecting 3 points, and the detection shows that the surface is flat and compact, no fine particles are concentrated, no sundries and loose phenomena are caused, the side lines are neat, no obvious wheel tracks and bulges exist, and the compaction quality is good;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; crushed stone with the grain diameter of 7.15mm, crushed stone with the grain diameter of 14.25mm, crushed stone with the grain diameter of 25.25mm and gravel are mixed according to the mass ratio of 20: 25: 25:30, preparing crushed stone, and preparing a mixture of the crushed stone and the composite portland cement according to a mass ratio of 95: 5; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is realized by adopting a vibratory roller to perform static pressure for 1 time, the driving speed of the primary pressing is 1.6km/h, the secondary pressing is realized by adopting the vibratory roller to perform weak vibration for one time firstly and then perform strong vibration for 7 times, the driving speed of the secondary pressing is 1.6km/h, the final pressing is realized by adopting a rubber-tyred roller to perform rolling for 2 times, the driving speed of the final pressing is 2.25km/h, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept moist in the rolling process; maintaining the cement stabilized macadam base after rolling; the straight line and the flat curve section without the super high are rolled from the road shoulders at the two sides to the road center, and the flat curve section with the super high is rolled from the road shoulder at the inner side to the road shoulder at the outer side; the processing method of the joint of the two operation sections constructed on the same day is that after the previous operation section is mixed and shaped, 6.5m is left for not rolling, and when the next operation section is constructed, the unpressurized part of the previous operation section is left for adding cement for mixing again and is rolled together with the next operation section; the end seam processing method of the last operation section after the construction every day is characterized in that a groove transversely penetrating through a cement stabilized macadam base layer is dug at the rolled tail end, the groove width is 30cm, the bottom of the groove is dug to the top surface of the base layer, the groove is vertical to the center line of a road, one surface, facing the operation section, in the groove is a vertical surface, two square timbers are placed in the groove and tightly attached to the vertical surface, the thickness of each square timbers is equal to the compaction thickness, and the length of each square timbers is half of the width of the cement stabilized; during operation on the next day, after the adjacent operation sections are mixed, removing the square timber, backfilling the groove by using the mixture, manually performing supplementary mixing on the part close to the part of the square timber which is not mixed, wherein the mixture at the joint is 5cm higher than the finished section when the square timber is leveled; through detection, the appearance is smooth, no wheel mark exists, no pulp turning exists, the surface is uniform and dense, no obvious segregation phenomenon exists, the edges are neat, the lap joint treatment is smooth, and the compaction quality is good;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; then closing the construction road section and maintaining; wherein the asphalt mixture is obtained by uniformly mixing asphalt, coarse aggregate, fine aggregate and filler according to the mass ratio of 108:1375:848:69, the coarse aggregate is 10.35mm particle size macadam, the fine aggregate is 2.35mm particle size macadam, and the filler is limestone powder; the paving of the asphalt mixture is carried out by using a paver, wherein the paving speed of 20m before the beginning of the paver is 1m/min, and then the paving speed is 2 m/min; the detection proves that the appearance is smooth, the wheel tracks are avoided, the seam is good, and the compaction quality is good.

Claims (10)

1. A construction method for externally connecting roads of a mobile town is characterized by comprising the following steps:
s1, measurement and setting: releasing a center line of the road according to the lead and the elevation control point and setting a control pile, and then releasing a side flat stone side line according to the center line of the road and setting the control pile;
s2, roadbed construction: paying off and controlling piles according to the step S1, cleaning up miscellaneous soil in the range of the roadbed, excavating drainage ditches at two sides of the roadbed, and rolling the roadbed after drying;
s3, constructing a subbase layer: firstly, paving the broken stones on the roadbed, and then repeating the leveling and rolling processes twice; then, strickling from two sides to the center of the road or from one side to the other side of the road; rolling the crushed stone according to the sequence of initial pressing, re-pressing and final pressing, wherein the initial pressing is performed for 1 time by adopting a vibratory roller for static pressure, the re-pressing is performed for 1 time by adopting the vibratory roller for weak vibration firstly and then for 4 times by strong vibration, and the final pressing is performed for 1 time by adopting the vibratory roller for static pressure;
s4, cement stabilized macadam foundation construction: fixing square timber retaining plates on two sides of the road surface; crushed stone with the particle size of not less than 4.75mm and not more than 9.5mm, crushed stone with the particle size of not less than 9.5mm and not more than 19mm, crushed stone with the particle size of not less than 19mm and not more than 31.5mm and gravel are mixed according to the mass ratio of 18-22: 23-27: preparing crushed stone at a ratio of 23-27: 28-32, and preparing a mixture of the crushed stone and the composite portland cement at a mass ratio of 90-110: 3-7; before the mixture is spread, sprinkling water on the subbase layer, and then uniformly spreading the mixture on the subbase layer; rolling the mixture according to the sequence of primary pressing, secondary pressing and final pressing, wherein the primary pressing is static pressure for 1 time by adopting a vibratory roller, the secondary pressing is weak vibration for one time firstly by adopting the vibratory roller, then strong vibration is carried out for 6-8 times, the final pressing is rolling for 2 times by using a rubber wheel roller, a cement-stabilized macadam base layer is formed, and the surface of the mixture is kept wet in the rolling process; maintaining the cement stabilized macadam base after rolling;
s5, asphalt concrete surface layer construction: uniformly spraying prime coat oil on the cement stabilized macadam base layer, enabling the prime coat oil to permeate into the cement stabilized macadam base layer and be connected with the cement stabilized macadam base layer into a whole, then paving a lower seal layer on the prime coat oil in a full-section paving mode, and completely sealing water; uniformly paving an asphalt mixture on the lower seal layer, and then rolling to form a lower surface layer; before the upper layer is constructed, uniformly spraying adhesive layer oil on the lower layer in a mist spraying mode to form an adhesive layer; uniformly spreading an asphalt mixture on the adhesive layer, and then rolling to form an upper surface layer; and then closing the construction road section and maintaining.
2. The construction method for the external connection road of the mobile town according to claim 1, wherein the loose paving coefficient is 1.25-1.35 and the compacted thickness is not less than 10cm when the crushed stones are paved in the step S3.
3. The construction method of the externally-connected road of the mobile town as claimed in claim 1, wherein the initial driving speed of the step S3 is 1.5-2.0 km/h, the re-pressing driving speed is 2.0-2.5 km/h, and the final driving speed is 1.5-2.0 km/h.
4. The construction method of the externally-connected road of the mobile town according to claim 1, wherein the method for treating the transverse seam joint of the two operation sections in the step S3 is to mix the transverse seam joint in a lap-joint mode, and leave 5-8 m of the transverse seam joint without rolling after the previous operation section is mixed; when the construction of the next operation section is carried out, the part which is left by the previous operation section and is not pressed is added with water again for mixing, and is rolled together with the next operation section; and step S3, when the belt dividing operation is carried out along the width of the operation section, the materials are mixed and rolled alternately for 3-4 times within the range of 1m on the left side of the joint and 1m on the right side of the joint.
5. The construction method of the external-connection road of the mobile town as claimed in claim 1, wherein in the step of rolling at S4, the straight line and the flat curve section without the super-elevation are rolled from the shoulder portions at both sides to the center of the road, and the flat curve section with the super-elevation is rolled from the shoulder portion at the inner side to the shoulder portion at the outer side.
6. The construction method for the externally-connected road of the mobile town according to claim 1, wherein during the rolling in the step S4, the driving speed of the initial pressure is 1.5-1.7 km/h, the driving speed of the re-pressure is 1.5-1.7 km/h, and the driving speed of the final pressure is 2.0-2.5 km/h.
7. The construction method of an external connection road of a mobile town as claimed in claim 1, wherein the processing method of the joint of the two working sections constructed on the same day in the step S4 is that after the previous working section is mixed and shaped, 5-8 m is left without rolling, and when the next working section is constructed, the previous working section is left without being pressed, cement is added for mixing again, and the mixing is carried out together with the next working section.
8. The construction method of externally-connected roads by a mobile town according to claim 1, wherein the end seam processing method of the last working section after the construction of each day in the step S4 is to dig a groove transversely penetrating through the cement stabilized macadam foundation at the rolled end, the groove width is 30cm, the bottom of the groove is dug to the top surface of the foundation, the groove is perpendicular to the center line of the road, one surface of the groove facing the working section is a vertical surface, two square timbers are placed in the groove and tightly attached to the vertical surface, the thickness of the square timbers is equal to the compacted thickness, and the length of the square timbers is half of the width of the cement stabilized macadam foundation; and during operation on the next day, after the adjacent operation sections are mixed, removing the square timber, backfilling the groove by using the mixture, manually performing supplementary mixing on the part close to the part of the square timber which is not mixed, and enabling the mixture at the joint to be 5cm higher than the finished section when the square timber is leveled.
9. The construction method of the externally-connected road of the mobile town as claimed in claim 1, wherein in the step S5, the asphalt mixture is obtained by uniformly mixing asphalt, coarse aggregate, fine aggregate and filler according to the mass ratio of 105-110: 1360-1390: 840-850: 67-71, wherein the coarse aggregate is broken stone with the particle size of 4.75mm and less than or equal to 16mm, the fine aggregate is broken stone with the particle size of 0mm and less than or equal to 4.75mm, and the filler is limestone powder.
10. The construction method for the external connection road of the mobile town as claimed in claim 1, wherein the paving of the asphalt mixture in the step S5 is performed by using a paver, the paving speed 20m before the beginning of the paver is 1m/min, and then the paving speed is 1-3 m/min.
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