CN112482119A - Construction method for cement stabilized macadam foundation - Google Patents
Construction method for cement stabilized macadam foundation Download PDFInfo
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- CN112482119A CN112482119A CN202011314647.3A CN202011314647A CN112482119A CN 112482119 A CN112482119 A CN 112482119A CN 202011314647 A CN202011314647 A CN 202011314647A CN 112482119 A CN112482119 A CN 112482119A
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- road bed
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- 239000004568 cement Substances 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000005056 compaction Methods 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 22
- 230000003068 static effect Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 238000003384 imaging method Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 description 8
- 239000011090 solid board Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 238000009411 base construction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4806—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing
- E01C19/4826—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing the materials being aggregate mixed with binders
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/50—Removable forms or shutterings for road-building purposes; Devices or arrangements for forming individual paving elements, e.g. kerbs, in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The application relates to a construction method of a cement stabilized macadam foundation, which comprises the following steps: s1, preparing a road bed; s2, measuring and setting out; s3, mounting a side protection die; s4, paving the cement-gravel mixture; s5, compacting; and S6, maintaining. This application has the quality of guaranteeing cement rubble roadbed slope, guarantees the effect of the quality of construction back cement rubble roadbed.
Description
Technical Field
The application relates to the field of road construction, in particular to a construction method of a cement stabilized macadam foundation.
Background
Most of the high-grade roads in China use cement to stabilize the macadam foundation. The cement stabilized macadam has good mechanical property, high initial strength and increment in an instar period, and the mechanical strength can be adjusted according to actual engineering requirements. The cement stabilized macadam has the characteristics of high strength, good water stability, good freezing resistance and scouring resistance, and is an excellent pavement base material. However, the cement stabilized macadam material has certain disadvantages, mainly because the cement stabilized macadam has high brittleness, so that the sensitivity to humidity and temperature is high, and the pavement strength and the service performance are obviously reduced because cracks are generated and reflected to the pavement due to the change of the temperature and the humidity, so that the control of the cement stabilized macadam is very important in the construction process.
The existing cement gravel base course is made up by using graded gravel as aggregate, adopting a certain quantity of cementing material and enough mortar volume to fill the gap of aggregate, laying according to the embedding and extruding principle and then compacting. However, when the cement gravel base is laminated, transverse extrusion and pushing can be generated in real time, so that the elevation of the edge part becomes low, the transverse slope becomes large, and the compactness of the two sides of the road base cannot be ensured. Often, follow-up finishing is needed, which causes great waste of people, materials and machines.
Disclosure of Invention
In order to guarantee the quality of cement gravel road base slopes and guarantee the quality of cement gravel base after construction, the application provides a cement stabilized gravel base construction method.
The application provides a construction method of a cement stabilized macadam foundation, which adopts the following technical scheme:
a construction method of a cement stabilized macadam foundation comprises the following steps:
s1, measuring and setting out: measuring and setting out on the upper side of the road bed according to construction requirements so as to calibrate the construction length and width of the cement gravel base;
s2, mounting the side protection die (1): installing side-protecting mold according to paying-off
1, forming a side die (1), wherein the side die (1) comprises a side vertical plate (11), the upper side of the side vertical plate (11) is rotatably connected with a positioning sleeve (13) with a horizontally arranged axis, and the positioning sleeve (13) can rotate until the axis direction is the same as the length direction of the side vertical plate (11) or the axis direction is vertical to the axis direction of the side vertical plate (11); the inner hole of the positioning sleeve (13) is a taper hole, and the aperture of the smaller end of the taper hole is less than 5 mm;
2, positioning the first side die (1), respectively arranging the side dies (1) on two sides of the paving width of the base layer, adjusting the distance between vertical plates (11) on two sides to meet the requirement, and ensuring that the length directions of the two side dies (1) are the same as the length direction of the base layer to be paved;
3, the first side die (1) is adjusted and fixed, the two positioning sleeves (13) are rotated to enable the axial directions of the two positioning sleeves (13) to be perpendicular to the length direction of the corresponding side vertical plate (11), a laser emitter is arranged in the positioning sleeve (13) of the first side die (1), light rays emitted by the laser emitter can be emitted from one smaller end of a taper hole, the laser rays are enabled to be arranged coaxially with the corresponding taper hole, then an imaging plate is arranged at one end, far away from the laser emitter, of the positioning sleeve (13) of the other side die (1), the side die (1) is adjusted along the length direction of the side die (1) until the light rays of the laser emitter can pass through the two positioning sleeves (13) and are molded on the imaging plate, and then the position of the first side die (1) on a road bed can be respectively fixed;
4, splicing the side dies (1), respectively rotating the two rotating sleeves until the axial direction of the rotating sleeves is the same as the length direction of the side vertical plate (11), fixing a laser emitter in a positioning sleeve (13) of the other side vertical plate (11), and enabling the light of the laser emitter to face the laying direction of the base layer; then, the side molds (1) are respectively taken and sequentially spliced along the front side molds (1) on two sides of the roadbed, the positioning sleeves (13) are rotated until the axial direction of the positioning sleeves is the same as the length direction of the corresponding side mold (1), a shaping plate is taken after one side mold (1) is spliced and placed behind the side mold (1) which is spliced later, the subsequently spliced side mold (1) is adjusted according to the imaging plate until a laser line forms an image on the imaging plate through the positioning sleeves (13), and then the subsequently spliced side mold (1) is fixed;
s3, paving the cement-gravel mixture: paving a cement-gravel mixture according to an area surrounded by the side-shielding mold;
s4, compacting: rolling and compacting the mixed base layer to complete base layer forming;
s5, maintenance: and curing the base layer.
Through adopting above-mentioned technical scheme, set up the side form according to the rule in the both sides of roadbed, then pave the completion back at the cement rubble, directly can be in pressing real time to the cement rubble, avoid the horizontal expansion of cement rubble, guarantee the quality of cement rubble roadbed side slope, and then guarantee the quality of construction back cement rubble basic unit, in addition, when the installation side form, at first through the first side form of position sleeve and laser emitter cooperation location roadbed both sides, the side form of rethread position sleeve and laser emitter location each side of mutually supporting, can guarantee the side form straightness accuracy and then guarantee the accurate connection of side form.
Optionally, the side forms of road bed both sides keep away from one side lower extreme each other and all the rigid coupling has the stabilizer plate of level setting, all set up a plurality of fixed orificess on the stabilizer plate.
By adopting the technical scheme: after the side die is fixed, the anchor nails can be directly adopted to penetrate through the fixing holes of the stabilizing plate and be inserted into the roadbed to realize the fixation of the stabilizing plate.
Optionally, when the base layer is compacted, the surface of the base layer is subjected to static pressure, then vibration compaction is adopted, and finally static pressure is applied, so that the static pressure of the second static pressure is greater than that of the first static pressure.
Through adopting above-mentioned technical scheme, when compaction basic unit, at first adopt the static pressure, can make basic unit surfacing, inside is closely knit, reduce the space between the cement rubble, carry out the vibrocompaction behind the first static pressure, can make the mutual gomphosis of the inside cement rubble of basic unit firm, eliminate the clearance between the cement rubble, carry out the second time static pressure after the vibrocompaction again, can be to further compaction of basic unit, the realization compresses tightly basic unit inside, and with partial cement rubble suppression slice, guarantee that basic unit is inside closely knit, and the surface parallel and level.
Optionally, when the base layer is compacted, compacting equipment is adopted, and the compacting equipment comprises two sliding rails and a walking frame arranged on the two sliding rails; the sliding rail can be detachably connected between a side vertical plate and a stabilizing plate of a side die which is in the same straight line after splicing, the walking frame comprises sliding carriages which are connected with the two sliding rails in a sliding mode, two sliding carriages are horizontally arranged on one side close to each other to be connected with a bearing beam, a pressing frame is horizontally arranged on the lower side of the bearing beam, a compaction roller with the length direction perpendicular to the length direction of the sliding rails is rotatably connected to the lower side of the pressing frame, and a telescopic rod is fixedly connected to a top pressure cylinder of the pressing frame in a vertical mode.
By adopting the technical scheme, when the lateral side pressing device is used, the two slide rails are fixed on the lateral sides of the two sides of the roadbed respectively, then the two sliding frames of the walking frame are arranged on the slide rails, at the moment, the bearing beam between the two sliding frames is positioned on the upper side of the base layer, then the pressing frame is driven to move downwards through the extension of the telescopic rod of the jacking cylinder, the pressing frame can be pushed to move downwards, so that the compaction roller is pressed on the upper surface of the roadbed, then the compaction roller can be driven to compact the roadbed through the movement of the two sliding frames along the slide rails, in addition, the slide rails further realize the connection and positioning of the lateral sides on the same side, the relative positions of the two sliding frames are unchanged in the operation process, the relative positions of the two slide rails are unchanged, the positions of the lateral sides on the two sides of the roadbed are further limited, the lateral sides of the base layer are prevented from being transversely.
Optionally, the downside level of accepting the roof beam is provided with length direction and presses the crane that holds a length direction the same, the downside level of crane is provided with length direction and presses the shake board that holds a length direction the same, the rigid coupling has the vibrator that can drive the vibration of shake board in the crane, accept to be provided with the lift cylinder that can drive the crane motion on the roof beam.
Through adopting above-mentioned technical scheme, in real time to road surface vibration pressure, drive the telescopic link through the lift jar and extend the drive crane downstream to plain bumper butt in basic unit, then drive the plain bumper vibration through the vibrator, can realize the plain bumper to the basic unit through the plain bumper.
Optionally, a rotating hole is vertically formed in the upper side of the side vertical plate, a rotating column which can be inserted into the rotating hole is vertically fixedly connected to the lower side of the positioning sleeve, a fixing ring is fixedly connected to the position, corresponding to the rotating hole, of the upper side of the side vertical plate, a pin shaft is inserted into one side of the fixing ring, and two positioning holes, which can be used for inserting the pin shaft when the positioning sleeve rotates to the length direction of the side vertical plate along with the axis direction or when the positioning sleeve rotates to the axis direction parallel to the side vertical plate, are formed in the circumferential surface of the rotating column.
Through adopting above-mentioned technical scheme, during carrying, can extract the position sleeve from the side riser, portable, during the use, in the rotation hole of locating the side riser with the rotation post of position sleeve, can realize the rotation of position sleeve for the side riser, in addition, through two locating holes respectively with the round pin axle cooperation, can realize the location of the relative position of position sleeve and side riser, convenient to use.
Optionally, the lower side of the carriage is rotatably connected with a roller capable of rolling along the slide rail.
By adopting the technical scheme, the adopted idler wheel is matched with the slide rail, the sliding frame can be conveniently moved,
optionally, preparing a road bed before measuring and paying off:
1, trimming a road bed: repairing the road bed to ensure that the surface of the road bed is flat and solid, and the elevation, the deviation of the center line, the width, the transverse gradient and the flatness of the road bed are in accordance with the regulations of the highway subgrade construction technical Specifications;
2, removing all the floating soil and sundries on the road bed, keeping the surface clean and properly watering and wetting;
3, digging and removing ruts, soft and parts which do not meet the specified requirements on the road bed, repairing the ruts and the soft parts by using the same materials, wherein the compacted thickness of the ruts and the soft parts is not less than 10cm, reshaping and rolling;
through adopting above-mentioned technical scheme, can repair the road bed before cement rubble basic unit is laid, be convenient for lay of cement rubble basic unit.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the side molds are arranged on two sides of the road bed according to the marking lines, then after cement gravel paving is completed, the cement gravel can be directly pressed in real time, the transverse expansion of the cement gravel is avoided, the quality of a cement gravel road base layer side slope is ensured, and further the quality of a cement gravel base layer after construction is ensured;
2. when the base layer is compacted, firstly, static pressure is adopted, the surface of the base layer can be flat, the interior of the base layer is compact, gaps among cement broken stones are reduced, vibration compaction is carried out after the first static pressure, the cement broken stones in the base layer can be firmly embedded with each other, gaps among the cement broken stones are eliminated, and then, the second static pressure is carried out after the vibration compaction, the base layer can be further compacted, the internal compaction of the base layer is realized, part of the cement broken stones are pressed into sheets, the internal compaction of the base layer is ensured, and the outer surface of the base layer is parallel and level;
3. when the device is used, firstly, the two slide rails are respectively fixed on the side dies on two sides of the roadbed, then the two sliding frames of the walking frame are arranged on the slide rails, at the moment, the bearing beam between the two sliding frames is positioned on the upper side of the base layer, then the telescopic rod of the jacking cylinder extends to drive the pressing frame to move downwards, so that the pressing frame can be pushed to move downwards, the compaction roller is pressed on the upper surface of the roadbed, then the two sliding frames move along the slide rails, so that the compaction roller can be driven to compact the roadbed, in addition, the slide rails further realize the connection and positioning of the side dies on the same side, and the relative positions of the two sliding frames are unchanged in the operation process, so that the relative positions of the two slide rails are unchanged, the position of the side dies on two sides of the roadbed is further limited, the base layer is prevented from being transversely expanded to push the side dies to move.
Drawings
FIG. 1 is a process flow diagram of a method of constructing a cement stabilized macadam foundation according to the present application.
FIG. 2 is a schematic diagram of a side form structure of the construction method of the cement stabilized macadam foundation.
FIG. 3 is a schematic view of the working conditions of the compaction apparatus of the present application.
FIG. 4 is a schematic diagram of the construction of the compaction apparatus of the present application.
Fig. 5 is an enlarged schematic view of a portion a of fig. 4.
Description of reference numerals: 1. side mould; 11. a side vertical plate; 111. a fixing ring; 112. a pin shaft; 12. a stabilizing plate; 121. a fixing hole; 13. a positioning sleeve; 131. rotating the column; 132. positioning holes; 2. a slide rail; 21. side fixing plates; 22. a bottom fixing plate; 23. a limiting plate; 231. a chute; 3. a walking frame; 31. a carriage; 311. a roller; 32. a bearing beam; 321. jacking and pressing the cylinder; 322. a lift cylinder; 33. a pressing and holding frame; 331. a compaction roller; 34. a lifting frame; 341. a compacting plate; 342. a vibrator.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses a construction method of a cement stabilized macadam foundation.
Referring to fig. 1, a method for constructing a cement stabilized macadam foundation includes the following steps
S1, preparing a road bed:
1, trimming a road bed: finishing a road bed to ensure that the surface of the road bed is flat and solid, and the elevation, the center line deviation, the width, the transverse gradient and the flatness of the road bed are in accordance with the regulations of technical Specifications for highway subgrade construction (JTGF 10-2006);
2, removing all the floating soil and sundries on the road bed, keeping the surface clean and properly watering and wetting;
and 3, digging and removing the ruts, the soft parts and the parts which do not meet the specified requirements on the road bed, repairing the ruts and the soft parts by using the same materials, wherein the compacted thickness of the ruts and the soft parts is not less than 10cm, reshaping and rolling.
S2, measuring and setting out: measuring and setting out on the upper side of the road bed according to construction requirements so as to calibrate the construction length and width of the cement gravel base;
s3, mounting the side protection die 1: installing a side protection mold according to the paying-off;
1, forming a side die 1 (refer to fig. 2), wherein the side die 1 comprises a side vertical plate 11 and a stabilizing plate 12 fixedly connected to the lower end of one side of the side vertical plate 11, and the stabilizing plate 12 is provided with a fixing hole 121; the upper side of the side vertical plate 11 is provided with a positioning sleeve 13, the axis of the positioning sleeve 13 is horizontally arranged, the lower side of the positioning sleeve 13 is vertically and fixedly connected with a rotating column 131, the upper side of the side vertical plate 11 is vertically provided with a rotating hole capable of being inserted with the rotating column 131, the position of the upper side of the side vertical plate 11 corresponding to the rotating hole is fixedly connected with a fixing ring 111, one side of the fixing ring 111 is inserted with a pin shaft 112, the peripheral surface of the rotating column 131 is provided with two positioning holes 132 capable of being inserted with the pin shaft 112 when the positioning sleeve 13 rotates to the axis direction perpendicular to the length direction of the side vertical plate 11 or the positioning sleeve 13 rotates to the axis direction parallel to the side vertical plate 11, the inner hole of the positioning sleeve 13 is;
2, positioning the front side die 1, respectively placing the two side dies 1 on two sides of the road bed corresponding to the cement-gravel mixture to be paved, so that the two stabilizing plates 12 are both positioned on one side of the vertical plates 11 on the two sides, which are far away from each other, and the length directions of the two side dies 1 are the same as the length direction of the base layer to be paved;
3, the first side die 1 is adjusted and fixed, the two positioning sleeves 13 are rotated to enable the axial directions of the two positioning sleeves 13 to be vertical to the length direction of the corresponding side vertical plate 11, a laser emitter is arranged in the positioning sleeve 13 of the first side die 1, light rays emitted by the laser emitter can be emitted from one smaller end of a taper hole, and the laser rays are ensured to be arranged coaxially with the corresponding taper hole, then the imaging plate is arranged at one end, far away from the laser emitter, of the positioning sleeve 13 of the other side die 1, the side die 1 is adjusted along the length direction of the side die 1 until the light rays of the laser emitter can pass through the two positioning sleeves 13 and be molded on the imaging plate, and at the moment, the first side die 1 can be fixed by passing through the fixing holes 121 of the two stabilizing plates 12 through rivets;
4, splicing the side dies 1, respectively rotating the two rotating sleeves until the axial direction of the two rotating sleeves is the same as the length direction of the side vertical plate 11, fixing a laser emitter in a positioning sleeve 13 of the other side vertical plate 11, and enabling the light of the laser emitter to face the laying direction of the base layer; then, sequentially splicing the side molds 1 along the front side molds 1 on two sides of the roadbed respectively, rotating each positioning sleeve 13 until the axial direction of each positioning sleeve is the same as the length direction of the corresponding side mold 1, taking a forming plate behind the side mold 1 spliced behind the side mold, adjusting the side mold 1 spliced subsequently according to the imaging plate until a laser line forms an image on the imaging plate through each positioning sleeve 13, and then fixing the side mold 1 spliced subsequently;
s4, paving the cement-gravel mixture: paving a cement-gravel mixture in an enclosing area of the side-protecting side mold according to the area;
s5, compacting: carrying out rolling compaction on the mixed base layer, and when compacting the base layer, firstly applying static pressure on the surface of the base layer, then adopting vibration compaction, and finally applying static pressure again to ensure that the static pressure of the second static pressure is greater than that of the first static pressure;
s6, maintenance: and curing the base layer.
After the completion of cement rubble paves, directly set up side form 1 in the both sides of roadbed, can press the cement rubble in real time, avoid the lateral expansion of cement rubble, guarantee the quality of cement rubble roadbed layer side slope, and then guarantee the quality of construction back cement rubble basic unit, in addition, when installation side form 1, at first through the first side form 1 of position sleeve 13 with laser emitter cooperation location roadbed both sides, the rethread position sleeve 13 is mutually supported the side form 1 of location each side with laser emitter, can guarantee the straightness accuracy of side form 1 and then guarantee the accurate connection of side form 1.
Referring to fig. 3 and 4, a compaction device is adopted when the base layer is compacted, and the compaction device comprises two slide rails 2 and a walking frame 3 arranged on the two slide rails 2; the length direction of slide rail 2 is the same with the length direction of basic unit, slide rail 2 includes side solid board 21, end solid board 22 and slope rigid coupling in the side solid board 21 and end solid limiting plate 23 (refer to fig. 5) between board 22, the limiting plate 23 is kept away from end solid board 22 and side solid board 21 one side and has been seted up spout 231 along the length direction of slide rail 2, side solid board 21 can bolted connection in the side riser 11 of side form 1, end solid board 22 can bolted connection in the upside of stabilising plate 12, and then realize that slide rail 2 can connect in the side form 1 that is in same straight line after the concatenation. The walking frame 3 comprises sliding carriages 31 arranged on the upper sides of the two sliding rails 2, the lower sides of the sliding carriages 31 are rotatably connected with rollers 311 capable of being inserted into sliding grooves 231 of the limiting plate 23, the rollers 311 roll along the sliding grooves 231 to drive the sliding carriages 31 to slide along the sliding rails 2, and one sides of the two sliding carriages 31, which are close to each other, are horizontally provided with bearing beams 32.
Firstly, the two slide rails 2 are respectively fixed on the side molds 1 on two sides of the roadbed, then the two slide carriages 31 of the walking frame 3 are arranged on the slide rails 2, at the moment, the bearing beam 32 between the two slide carriages 31 is positioned on the upper side of the base layer, the slide rails 2 further realize the connection and positioning of the side molds 1 on the same side, and in the running process, the relative positions of the two slide carriages 31 are inconvenient, so that the relative positions of the two slide rails 2 are not changed, and further the positions of the side molds 1 on two sides of the roadbed are limited, thereby avoiding the transverse expansion of the base layer in the process of compacting equipment from pushing the side molds 1 to move, and ensuring the width of the base layer.
The lower side of the bearing beam 32 is horizontally provided with a pressure-holding frame 33 and a lifting frame 34, the length directions of the pressure-holding frame 33, the lifting frame 34 and the bearing beam 32 are the same, a jacking cylinder 321 is vertically and fixedly connected at the position of the lower side of the bearing beam 32 corresponding to the pressure-holding frame 33, and the expansion rod of the jacking cylinder 321 is fixedly connected at the upper side of the pressure-holding frame 33. The lower side of the pressing frame 33 is rotatably connected with a compacting roller 331 with a length direction perpendicular to the length direction of the slide rail 2. A lifting cylinder 322 is vertically and fixedly connected to the lower side of the bearing beam 32 corresponding to the lifting frame 34, the telescopic rod of the lifting cylinder 322 is fixedly connected to the lifting frame 34 downwards, a compaction plate 341 with the length direction the same as that of the pressing frame 33 is horizontally arranged on the lower side of the lifting frame 34, and a vibrator 342 capable of driving the compaction plate 341 to vibrate is fixedly connected to the lifting frame 34. When the pressing is carried out on the road surface, the telescopic rod of the jacking cylinder 321 extends to drive the pressing holder 33 to move downwards, so that the pressing holder 33 can be pushed to move downwards, the compaction roller 331 is pressed on the upper surface of the road bed, and then the two sliding frames 31 move along the sliding rails 2, so that the compaction roller 331 can be driven to compact the road bed; when the road surface vibration pressure is real-time, the jacking cylinder 321 drives the pressure holding frame 33 to reset, the lifting cylinder 322 drives the telescopic rod to extend and drive the lifting frame 34 to move downwards until the vibration plate 341 abuts against the base layer, then the vibrator 342 drives the vibration plate 341 to vibrate, and the base layer can be vibrated through the vibration plate 341.
The implementation principle of the construction method for the cement stabilized macadam foundation in the embodiment of the application is as follows: after the completion of cement rubble paves, directly set up side form 1 in the both sides of roadbed, can press the cement rubble in real time, avoid the lateral expansion of cement rubble, guarantee the quality of cement rubble roadbed side slope, and then guarantee the quality of construction back cement rubble basic unit, in addition, when installation side form 1, at first through the first side form 1 of position sleeve 13 with laser emitter cooperation location roadbed both sides, the rethread position sleeve 13 is mutually supported the side form 1 of location each side with laser emitter, can guarantee side form 1 straightness accuracy.
When a base layer is compacted, the two slide rails 2 are respectively fixed on the side dies 1 on two sides of the roadbed, then the two slide carriages 31 of the walking frame 3 are arranged on the slide rails 2, at the moment, the bearing beam 32 between the two slide carriages 31 is positioned on the upper side of the base layer, then, when the roadbed is compacted, the telescopic rod of the jacking cylinder 321 extends to drive the pressing holder 33 to move downwards, and the pressing holder 33 can be pushed to move downwards, so that the compacting roller 331 is pressed on the upper surface of the roadbed, and then, the two slide carriages 31 move along the slide rails 2 to drive the compacting roller 331 to compact the roadbed; when the road surface vibration pressure is real-time, the jacking cylinder 321 drives the pressure holding frame 33 to reset, the lifting cylinder 322 drives the telescopic rod to extend and drive the lifting frame 34 to move downwards until the vibration plate 341 abuts against the base layer, then the vibrator 342 drives the vibration plate 341 to vibrate, and the base layer can be vibrated through the vibration plate 341.
In addition, the slide rails 2 further realize the connection and positioning of the side molds 1 on the same side, and in the operation process, the relative positions of the two slide rails 2 are not convenient, so that the relative positions of the two slide rails 2 are not changed, the positions of the side molds 1 on the two sides of the roadbed are limited, the phenomenon that the base layer transversely expands to push the side molds 1 to move in the compaction process is avoided, and the width of the base layer is ensured.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The construction method of the cement stabilized macadam foundation is characterized by comprising the following steps:
s1, measuring and setting out: measuring and setting out on the upper side of the road bed according to construction requirements so as to calibrate the construction length and width of the cement gravel base;
s2, mounting the side protection die (1): installing side-protecting mold according to paying-off
1, forming a side die (1), wherein the side die (1) comprises a side vertical plate (11), the upper side of the side vertical plate (11) is rotatably connected with a positioning sleeve (13) with a horizontally arranged axis, and the positioning sleeve (13) can rotate until the axis direction is the same as the length direction of the side vertical plate (11) or the axis direction is vertical to the axis direction of the side vertical plate (11); the inner hole of the positioning sleeve (13) is a taper hole, and the aperture of the smaller end of the taper hole is less than 5 mm;
2, positioning the first side die (1), respectively arranging the side dies (1) on two sides of the paving width of the base layer, adjusting the distance between vertical plates (11) on two sides to meet the requirement, and ensuring that the length directions of the two side dies (1) are the same as the length direction of the base layer to be paved;
3, the first side die (1) is adjusted and fixed, the two positioning sleeves (13) are rotated to enable the axial directions of the two positioning sleeves (13) to be perpendicular to the length direction of the corresponding side vertical plate (11), a laser emitter is arranged in the positioning sleeve (13) of the first side die (1), light rays emitted by the laser emitter can be emitted from one smaller end of a taper hole, the laser rays are enabled to be arranged coaxially with the corresponding taper hole, then an imaging plate is arranged at one end, far away from the laser emitter, of the positioning sleeve (13) of the other side die (1), the side die (1) is adjusted along the length direction of the side die (1) until the light rays of the laser emitter can pass through the two positioning sleeves (13) and are molded on the imaging plate, and then the position of the first side die (1) on a road bed can be respectively fixed;
4, splicing the side dies (1), respectively rotating the two rotating sleeves until the axial direction of the rotating sleeves is the same as the length direction of the side vertical plate (11), fixing a laser emitter in a positioning sleeve (13) of the other side vertical plate (11), and enabling the light of the laser emitter to face the laying direction of the base layer; then, the side molds (1) are respectively taken and sequentially spliced along the front side molds (1) on two sides of the roadbed, the positioning sleeves (13) are rotated until the axial direction of the positioning sleeves is the same as the length direction of the corresponding side mold (1), a shaping plate is taken after one side mold (1) is spliced and placed behind the side mold (1) which is spliced later, the subsequently spliced side mold (1) is adjusted according to the imaging plate until a laser line forms an image on the imaging plate through the positioning sleeves (13), and then the subsequently spliced side mold (1) is fixed;
s3, paving the cement-gravel mixture: paving a cement-gravel mixture according to the area in the side protection side mold;
s4, compacting: rolling and compacting the mixed base layer to complete base layer forming;
s5, maintenance: and curing the base layer.
2. The method of constructing a cement stabilized macadam foundation as recited in claim 1, wherein: the side forms (1) of road bed both sides keep away from one side lower extreme each other and all the rigid coupling has stabilizer plate (12) that the level set up, all set up a plurality of fixed orificess (121) on stabilizer plate (12).
3. The method of constructing a cement stabilized macadam foundation as recited in claim 1, wherein: when the base layer is compacted, firstly, static pressure is applied to the surface of the base layer, then vibration compaction is adopted, and finally, static pressure is applied again, so that the static pressure of the second static pressure is greater than that of the first static pressure.
4. The cement stabilized macadam foundation construction method according to claim 1, characterized in that compacting equipment is adopted when compacting the foundation, and the compacting equipment comprises two slide rails (2) and a walking frame (3) arranged on the two slide rails (2); slide rail (2) can be dismantled and connect and be in between side riser (11) and the stabilizer plate (12) of collinear side form (1) after the concatenation, walking frame (3) including slide connection in balladeur train (31) of two slide rails (2), two the balladeur train (31) be close to one side level each other and be provided with and accept roof beam (32), the downside level of accepting roof beam (32) is provided with presses and holds frame (33), the downside of pressing and holding frame (33) is rotated and is connected with length direction perpendicular to slide rail (2) length direction's compaction roller (331), the vertical rigid coupling of downside of accepting roof beam (32) has telescopic link rigid coupling in top pressure cylinder (321) of pressing and holding frame (33).
5. The method of constructing a cement stabilized macadam foundation according to claim 4, wherein: the bearing beam is characterized in that a lifting frame (34) with the length direction being the same as the length direction of the pressing and holding frame (33) is horizontally arranged on the lower side of the bearing beam (32), a vibrating plate (341) with the length direction being the same as the length direction of the pressing and holding frame (33) is horizontally arranged on the lower side of the lifting frame (34), a vibrator (342) capable of driving the vibrating plate (341) to vibrate is fixedly connected into the lifting frame (34), and a lifting cylinder (322) capable of driving the lifting frame (34) to move is arranged on the bearing beam (32).
6. The method of constructing a cement stabilized macadam foundation as recited in claim 1, wherein: the equal vertical rotation hole of having seted up of upside of side riser (11), the equal rigid coupling of downside of position sleeve (13) has vertically to be provided with and to insert and locates rotation downthehole rotation post (131), the position rigid coupling that side riser (11) upside corresponds the rotation hole has solid fixed ring (111), gu fixed ring (111) one side is inserted and is equipped with round pin axle (112), rotate the global locating hole (132) that can insert and establish round pin axle (112) when two rotate to the length direction of axis direction perpendicular to side riser (11) along with position sleeve (13) or position sleeve (13) rotate to axis direction and be on a parallel with side riser (11).
7. The method of constructing a cement stabilized macadam foundation according to claim 4, wherein: the lower side of the sliding frame (31) is rotatably connected with a roller (311) capable of rolling along the sliding rail (2).
8. The method of constructing a cement stabilized macadam foundation as recited in claim 1, wherein: preparing a road bed before measurement and paying off:
1, trimming a road bed: repairing the road bed to ensure that the surface of the road bed is flat and solid, and the elevation, the deviation of the center line, the width, the transverse gradient and the flatness of the road bed are in accordance with the regulations of the highway subgrade construction technical Specifications;
2, removing all the floating soil and sundries on the road bed, keeping the surface clean and properly watering and wetting;
and 3, digging and removing the ruts, the soft parts and the parts which do not meet the specified requirements on the road bed, repairing the ruts and the soft parts by using the same materials, wherein the compacted thickness of the ruts and the soft parts is not less than 10cm, reshaping and rolling.
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Application publication date: 20210312 |