CN111910481A - Construction method for widening roadbed of highway - Google Patents
Construction method for widening roadbed of highway Download PDFInfo
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- CN111910481A CN111910481A CN202010853010.5A CN202010853010A CN111910481A CN 111910481 A CN111910481 A CN 111910481A CN 202010853010 A CN202010853010 A CN 202010853010A CN 111910481 A CN111910481 A CN 111910481A
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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
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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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Abstract
The application relates to a construction method for widening a roadbed of a highway, which comprises the following steps: step 1, measuring and lofting the position of an original roadbed needing to be widened, marking the position needing to be widened, and digging a slope surface step by step along the slope angle of the original roadbed; step 2, driving a timber pile on the bottom platform; step 3, laying a geogrid on the bottom layer platform; step 4, laying gravels on the geogrids in a layered mode until the gravels are flush with the surface of the upper-stage platform; when the gravel soil is laid in layers, drilling an installation groove on one side of the original roadbed close to the gravel soil layer, and installing a connecting device in the installation groove; step 5, driving the timber pile on the platform in the step 4 according to the step 2; step 6, laying geogrids on the platform in the step 4; step 7, repeating the steps 4-6; and 8, paving the gravel on the compacted surface, and then compacting until the gravel is flush with the surface of the original roadbed.
Description
Technical Field
The application relates to the technical field of road construction, in particular to a construction method for widening a roadbed of a highway.
Background
With the rapid development of socioeconomic in China, most of the functions of the existing roads can not meet the increasing traffic demand of the society, so that the original roads are imperatively upgraded and modified. The key of the engineering reconstruction is the widening of the highway subgrade, namely the design and the construction.
The related technology can refer to the Chinese patent with the publication number of CN106522055B, and discloses a construction method for widening a road bed, wherein a slope surface with the same gradient as that of an original road bed is manufactured on the original road bed step by step, then wooden piles with a supporting function are driven into a gravel soil layer compacted layer by layer in a crossed manner, and then a geogrid with the connection stability of a new original road bed is laid and fixed on each layer of surface, so that the widened road bed is tightly combined with the original road bed, the settlement of the widened road bed is effectively reduced, the generation of cracks between the new original road beds is avoided, and the service life of the widened road is prolonged.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the new roadbed is connected with the original roadbed only through the wooden piles, so that the new roadbed and the original roadbed are easily connected to be weak.
Disclosure of Invention
In order to enhance the connection firmness of the new roadbed and the original roadbed, the application provides a construction method for widening the roadbed of the highway.
The application provides a construction method for widening a roadbed of a highway, which adopts the following technical scheme:
a construction method for widening a roadbed of a highway comprises the following steps:
step 1, measuring and lofting positions needing to be widened of an original roadbed, marking the positions needing to be widened, digging slope surfaces step by step along the slope angles of the original roadbed, gradually decreasing the width of a platform between every two levels of slope surfaces from a road surface to the bottom, and setting the vertical height of each slope surface to be 1-2 meters;
step 2, driving timber piles with the same length as the slope surface into the bottom-layer platform along the direction parallel to the slope surface and the direction vertical to the slope surface respectively until the top surfaces of the timber piles are flush with the bottom-layer platform;
step 3, laying a geogrid on the bottom layer platform;
step 4, laying gravels on the geogrid in layers, compacting after laying the gravels with the thickness of 25-35 cm until the gravels are flush with the surface of the upper-stage platform; when the gravel soil is laid in layers, drilling an installation groove on one side of the original roadbed close to the gravel soil layer, and installing a connecting device in the installation groove; the connecting device comprises a connecting pipe arranged in a mounting groove, two through holes are formed in the side wall of the connecting pipe, limiting blocks are connected in the two through holes in a sliding mode, a pouring channel is formed in one side of each limiting block, two slots are formed in the inner wall of the mounting groove, the two limiting blocks are respectively inserted into the two slots, a vertical pipe is communicated with one end, close to a gravel soil layer, of the connecting pipe, and the connecting device further comprises a driving mechanism for driving the two limiting blocks to move; after the two limiting blocks are respectively inserted into the two slots through the driving mechanism, concrete is poured into the connecting pipe through the vertical pipe, and the concrete can conveniently flow into the slots through the pouring channel, so that the limiting blocks and the slots are fixedly connected;
step 5, driving the timber pile on the platform in the step 4 according to the step 2;
step 6, laying geogrids on the platform in the step 4;
7, repeating the steps 4-6 until the compacted surface is 5-10 cm lower than the surface of the original roadbed;
and 8, paving the gravel on the compacted surface, and then compacting until the gravel is flush with the surface of the original roadbed.
By adopting the technical scheme, the two limiting blocks are respectively inserted into the two slots through the driving mechanism, and then concrete is poured into the connecting pipe through the vertical pipe, so that the connecting pipe can be fixedly connected with the original roadbed; by arranging the vertical pipe, the vertical pipe is embedded in the gravel soil layer, so that the connecting pipe is conveniently connected with the new roadbed; in conclusion, by arranging the connecting device, the firmness of the connection between the new roadbed and the original roadbed can be enhanced.
Preferably, in the step 4, the driving mechanism includes a driving pipe rotatably connected in the connecting pipe and two first connecting rods hinged to the outer side wall of the driving pipe, and the ends, far away from each other, of the two first connecting rods are hinged to the opposite ends of the two limiting blocks respectively; the driving pipe is internally provided with a driving rod, a matching component used for driving the driving pipe to rotate is arranged between the driving rod and the driving pipe, and a driving component used for driving the driving rod to move is arranged in the vertical pipe.
By adopting the technical scheme, when the two limiting blocks need to be driven to move, the driving rod is driven to move through the driving assembly, the driving rod drives the driving pipe to rotate under the action of the matching assembly, the driving pipe drives the two first connecting rods to move in a rotating manner, and the two limiting blocks can be driven to move by the movement of the two first connecting rods; through setting up actuating mechanism, be convenient for drive two spacing block and remove.
Preferably, the driving assembly comprises a lead screw vertically and rotatably connected in the vertical pipe, a hand wheel installed at the top of the lead screw, and a driving block which is in threaded connection with the lead screw and vertically slides in the vertical pipe; one side of the driving block is hinged with a second connecting rod, and one end, far away from the driving block, of the second connecting rod is hinged to one end, close to the screw rod, of the driving rod.
By adopting the technical scheme, when the driving rod needs to be driven to move, the lead screw is rotated by rotating the hand wheel, the lead screw rotates to drive the driving block to move, the driving block moves to drive the second connecting rod to move, and the driving rod can be driven to move by the second connecting rod; through setting up drive assembly, be convenient for drive actuating lever and remove.
Preferably, a vertical rod is fixedly connected in the vertical pipe, and the driving block is connected to the vertical rod in a sliding manner along the vertical direction.
Through adopting above-mentioned technical scheme, the montant has the guide effect to the drive block to can reduce the drive block and take place the possibility of deviating along vertical slip in-process.
Preferably, the cooperation subassembly includes a plurality of spiral pieces of rigid coupling in the actuating lever lateral wall in proper order along the circumference of actuating lever, a plurality of helicla flutes have been seted up in proper order along its circumference to the inner wall of driving tube, the spiral piece with the helicla flute one-to-one cooperation.
Through adopting above-mentioned technical scheme, through setting up spiral piece and helicla flute, the actuating lever drive tube of being convenient for rotates.
Preferably, the top rigid coupling of lead screw has square piece, the square groove that supplies square piece grafting is seted up to the bottom of hand wheel, the fixed subassembly that is used for fixed square piece is installed to the lateral wall in square groove.
By adopting the technical scheme, when the hand wheel needs to be installed, the square block is inserted into the square groove by moving the hand wheel, and then the square block is fixed by the fixing component, so that the hand wheel can be installed; when the hand wheel needs to be detached, the square block is loosened through the fixing assembly, and then the hand wheel is taken down; to sum up, through setting up fixed subassembly, be convenient for carry out the dismouting to the hand wheel, when needs pour the concrete in to the connecting tube, can take off the hand wheel to can save the cost.
Preferably, the side wall of the square groove is provided with a through hole, the fixing component comprises a bolt connected to the through hole in a sliding manner, one side of the square block is provided with an insertion hole, one end of the bolt is inserted into the insertion hole, and the other end of the bolt protrudes out of the outer side wall of the square groove and is fixedly connected with a handle; the punch pin is provided with a sliding groove, the plug pin is sleeved with a stop dog, the stop dog slides and is connected to the sliding groove along the axial direction of the punch pin, the plug pin is sleeved with a spring, one end of the spring is fixedly connected to one side, far away from the square block, of the stop dog, and the other end of the spring is fixedly connected to the inner wall of one end, far away from the square block, of the sliding groove.
By adopting the technical scheme, when the hand wheel needs to be installed, the plug pin enters the through hole by moving the handle, the plug pin moves to drive the stop block to move, the stop block moves to press the spring, and the spring is in a compressed state; then the square block is inserted into the square groove by moving the hand wheel, then the handle is loosened, and at the moment, the stop block drives the plug pin to be inserted into the jack under the action of the spring, so that the square block can be fixed; through setting up fixed subassembly, be convenient for fix the square block.
Preferably, a horizontal pipe is communicated with the joint of the connecting pipe and the vertical pipe, the horizontal pipe is pre-embedded in the gravel soil layer, a row of first pouring holes are formed in the side wall of the horizontal pipe along the axial direction of the horizontal pipe, an inner pipe is rotationally connected in the horizontal pipe, a row of second pouring holes are formed in the side wall of the inner pipe along the axial direction of the inner pipe, and the first pouring holes and the second pouring holes are arranged in a one-to-one correspondence manner; and a transmission assembly for driving the inner pipe to rotate is arranged in the vertical pipe.
By adopting the technical scheme, before concrete is poured, the first pouring hole and the second pouring hole are arranged in a staggered mode, so that the possibility that broken stones and soil enter the inner pipe can be reduced; before the concrete is poured to needs, pour the hole through transmission assembly drive inner tube rotation messenger first hole of pouring alignment second to can make the level pipe be connected more firmly with the gravel soil layer.
Preferably, the transmission assembly comprises a first bevel gear fixed at the bottom of the screw rod in a sleeved mode and a second bevel gear fixedly connected to one end, close to the screw rod, of the inner pipe; the first bevel gear is meshed with the second bevel gear.
By adopting the technical scheme, the screw rod rotates to drive the first bevel gear to rotate, the first bevel gear rotates to drive the second bevel gear to rotate, and the second bevel gear rotates to drive the inner pipe to rotate; through setting up transmission assembly, be convenient for drive inner tube and rotate.
Preferably, the lateral wall rigid coupling of connecting pipe has the pre-positioning piece, and the mounting groove is close to the one end of standpipe and offers the pre-positioning groove that is used for supplying the pre-positioning piece to peg graft, the pre-positioning piece passes through bolt rigid coupling in the pre-positioning groove.
Through adopting above-mentioned technical scheme, through setting up locating piece in advance and locating slot in advance, be convenient for make the stopper aim at the slot.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the two limiting blocks are respectively inserted into the two slots through the driving mechanism, and then concrete is poured into the connecting pipe through the vertical pipe, so that the connecting pipe can be fixedly connected with the original roadbed; by arranging the vertical pipe, the vertical pipe is embedded in the gravel soil layer, so that the connecting pipe is conveniently connected with the new roadbed; in conclusion, the firmness of connection between the new roadbed and the original roadbed can be enhanced by arranging the connecting device;
2. when the two limiting blocks need to be driven to move, the driving rod is driven to move through the driving assembly, the driving rod drives the driving pipe to rotate under the action of the matching assembly, the driving pipe drives the two first connecting rods to move in a rotating mode, and the two limiting blocks can be driven to move through the movement of the two first connecting rods; the driving mechanism is arranged, so that the two limiting blocks can be driven to move conveniently;
3. before concrete is poured, the first pouring hole and the second pouring hole are arranged in a staggered mode, so that the possibility that broken stones and soil enter the inner pipe can be reduced; before the concrete is poured to needs, pour the hole through transmission assembly drive inner tube rotation messenger first hole of pouring alignment second to can make the level pipe be connected more firmly with the gravel soil layer.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a partial cross-sectional view of a highlighted slot in an embodiment of the application;
FIG. 3 is a schematic view of the structure of a highlighted mating component in an embodiment of the present application;
FIG. 4 is a partial cross-sectional view of a highlighted mounting assembly in an embodiment of the application;
FIG. 5 is a partial cross-sectional view highlighting an inner tube in an embodiment of the present application.
Description of reference numerals: 1. an original roadbed; 11. mounting grooves; 12. a slot; 13. pre-positioning a groove; 2. a gravel soil layer; 3. a connecting device; 31. a connecting pipe; 311. a through hole; 312. pre-positioning blocks; 32. a limiting block; 321. pouring a road; 33. a vertical tube; 4. a drive mechanism; 41. a drive tube; 42. a first link; 43. a drive rod; 44. a drive assembly; 441. a lead screw; 4411. a square block; 442. a hand wheel; 4421. a square groove; 4422. perforating; 443. a drive block; 444. a vertical rod; 445. a second link; 45. a mating component; 451. a screw block; 452. a helical groove; 5. a fixing assembly; 51. a bolt; 52. a jack; 53. a handle; 54. a chute; 55. a stopper; 56. a spring; 6. a horizontal tube; 61. a first casting hole; 7. an inner tube; 71. a second pouring hole; 8. a transmission assembly; 81. a first bevel gear; 82. a second bevel gear.
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 for widening a roadbed of a highway, which comprises the following steps of:
step 1, measuring and lofting positions needing to be widened of an original roadbed 1, marking the positions needing to be widened, digging slope surfaces step by step along the slope angles of the original roadbed 1, gradually decreasing the width of platforms among the slope surfaces step by step from a road surface to the lower part, and setting the vertical height of the slope surfaces to be 1-2 meters;
step 2, driving wood piles with the same length as the slope surface into the bottom-layer platform along the direction parallel to the slope surface and the direction vertical to the slope surface respectively until the top surfaces of the wood piles are flush with the bottom-layer platform;
step 3, laying a geogrid on the bottom layer platform;
step 4, laying gravels on the geogrid in layers, compacting after laying the gravels with the thickness of 25-35 cm until the gravels are flush with the surface of the upper-stage platform; with reference to fig. 2 and 3, when the gravel soil is laid in layers, a plurality of installation grooves 11 are drilled on one side of the original roadbed 1 close to the gravel soil layer 2 through a drilling machine, each installation groove 11 is perpendicular to the slope of the original roadbed 1, and a connecting device 3 is installed in each installation groove 11; the connecting device 3 comprises a connecting pipe 31 arranged in the mounting groove 11, the side wall of the connecting pipe 31 is provided with two through holes 311, the two through holes 311 are connected with limit blocks 32 in a sliding manner, one side of each limit block 32 is provided with a pouring channel 321, the inner wall of the mounting groove 11 is provided with two slots 12, the two limit blocks 32 are respectively inserted into the two slots 12, one end of the connecting pipe 31 close to the gravel layer 2 is communicated with a vertical pipe 33, and the connecting device 3 further comprises a driving mechanism 4 for driving the two limit blocks 32 to move; after the two limit blocks 32 are respectively inserted into the two slots 12 through the driving mechanism 4, concrete is poured into the connecting pipe 31 through the vertical pipe 33, and the pouring channel 321 is arranged, so that the concrete can conveniently flow into the slots 12, and the limit blocks 32 are conveniently and fixedly connected with the slots 12; a pre-positioning block 312 is fixedly connected to the outer side wall of the connecting pipe 31, a pre-positioning groove 13 for the pre-positioning block 312 to be inserted is formed in one end, close to the vertical pipe 33, of the mounting groove 11, and the pre-positioning block 312 is fixedly connected to the pre-positioning groove 13 through a bolt;
step 5, driving a timber pile on the platform in the step 4 as in the step 2;
step 6, laying geogrids on the platform in the step 4;
7, repeating the steps 4-6 until the compacted surface is 5-10 cm lower than the surface of the original roadbed 1;
and 8, paving the crushed stone chips on the compacted surface, and then compacting until the crushed stone chips are flush with the surface of the original roadbed 1.
As shown in fig. 1 and fig. 2, the two stoppers 32 are respectively inserted into the two slots 12 by the driving mechanism 4, and then concrete is poured into the connecting pipe 31 through the vertical pipe 33, so that the connecting pipe 31 can be fixedly connected with the original roadbed 1; by arranging the vertical pipe 33, the vertical pipe 33 is embedded in the gravel soil layer 2, so that the connecting pipe 31 is conveniently connected with a new roadbed; in conclusion, by providing the connection device 3, the connection firmness of the new roadbed and the original roadbed 1 can be enhanced.
As shown in fig. 2 and 3, in step 4, the driving mechanism 4 includes a driving pipe 41 rotatably connected to the inside of the connecting pipe 31 through a bearing and two first connecting rods 42 hinged to the outer side wall of the driving pipe 41, and the mutually distant ends of the two first connecting rods 42 are hinged to the opposite ends of the two limit blocks 32, respectively; a driving rod 43 is arranged in the driving pipe 41, a matching assembly 45 for driving the driving pipe 41 to rotate is arranged between the driving rod 43 and the driving pipe 41, and a driving assembly 44 for driving the driving rod 43 to move is arranged in the vertical pipe 33. When the two limit blocks 32 need to be driven to move, the driving rod 43 is driven to move through the driving assembly 44, at this time, the driving rod 43 drives the driving pipe 41 to rotate under the action of the matching assembly 45, the driving pipe 41 drives the two first connecting rods 42 to move in a rotating manner, and the two first connecting rods 42 can drive the two limit blocks 32 to move in a moving manner; by arranging the driving mechanism 4, the two limit blocks 32 are driven to move conveniently.
As shown in fig. 2 and 3, the driving assembly 44 includes a screw 441 vertically and rotatably connected in the vertical pipe 33 through a bearing, a hand wheel 442 detachably connected to the top of the screw 441, and a driving block 443 threadedly connected to the screw 441 and vertically sliding in the vertical pipe 33; referring to fig. 5, a vertical rod 444 is fixedly connected in the vertical tube 33, the vertical tube 33 is disposed through the driving block 443, and the driving block 443 is connected to the vertical rod 444 in a sliding manner in the vertical direction; one side of the driving block 443 is hinged with a second connecting rod 445, and one end of the second connecting rod 445 far away from the driving block 443 is hinged with one end of the driving rod 43 close to the screw 441. When the driving rod 43 needs to be driven to move, the hand wheel 442 is rotated to rotate the lead screw 441, the lead screw 441 rotates to drive the driving block 443 to move, the driving block 443 moves to drive the second connecting rod 445 to move, and the second connecting rod 445 moves to drive the driving rod 43 to move; the driving rod 43 is driven to move conveniently by arranging the driving component 44.
As shown in fig. 2 and 3, the matching assembly 45 includes a plurality of spiral blocks 451 sequentially and fixedly connected to the side wall of the driving rod 43 along the circumferential direction of the driving rod 43, the inner wall of the driving pipe 41 is sequentially provided with a plurality of spiral grooves 452 along the circumferential direction, and the spiral blocks 451 are matched with the spiral grooves 452 in a one-to-one correspondence manner. The driving rod 43 is convenient to drive the driving pipe 41 to rotate by arranging the spiral block 451 and the spiral groove 452.
As shown in fig. 2 and 4, a square block 4411 is fixedly connected to the top of the screw 441, a square groove 4421 for inserting the square block 4411 is formed at the bottom of the hand wheel 442, and a fixing assembly 5 for fixing the square block 4411 is installed on the side wall of the square groove 4421. When the hand wheel 442 needs to be installed, the square block 4411 is inserted into the square groove 4421 by moving the hand wheel 442, and then the square block 4411 is fixed by the fixing component 5, so that the hand wheel 442 can be installed; when the hand wheel 442 needs to be detached, the square block 4411 is loosened through the fixing assembly 5, and then the hand wheel 442 is taken down; in conclusion, the hand wheel 442 can be conveniently detached by arranging the fixing assembly 5, and when concrete needs to be poured into the connecting pipe 31, the hand wheel 442 can be taken down, so that the cost can be saved.
As shown in fig. 4, a through hole 4422 is formed in a side wall of the square groove 4421, the fixing component 5 includes a bolt 51 slidably connected to the through hole 4422 along a length direction of the square block 4411, a jack 52 is formed in one side of the square block 4411, one end of the bolt 51 is inserted into the jack 52, and the other end of the bolt protrudes out of an outer side wall of the square groove 4421 and is fixedly connected with a handle 53; a sliding groove 54 is formed in the through hole 4422, a stopper 55 is fixedly sleeved on the bolt 51, the stopper 55 slides and is connected to the sliding groove 54 along the axial direction of the through hole 4422, a spring 56 is sleeved on the bolt 51, one end of the spring 56 is fixedly connected to one side of the stopper 55 far away from the square block 4411, and the other end of the spring is fixedly connected to the inner wall of one end of the sliding groove 54 far away from the square block 4411. When the handwheel 442 needs to be installed, the bolt 51 enters the through hole 4422 by moving the handle 53, the bolt 51 moves to drive the stopper 55 to move, the stopper 55 moves to press the spring 56, and the spring 56 is in a compressed state; then the hand wheel 442 is moved to enable the square block 4411 to be inserted into the square groove 4421, the handle 53 is released, and the stop block 55 drives the plug pin 51 to be inserted into the insertion hole 52 under the action of the spring 56, so that the square block 4411 can be fixed; by providing the fixing member 5, the square block 4411 is easily fixed.
As shown in fig. 2 and 5, a horizontal pipe 6 is communicated with a connection position of the connecting pipe 31 and the vertical pipe 33, one end of the horizontal pipe 6, which is far away from the vertical pipe 33, is arranged in a closed manner, the horizontal pipe 6 is pre-embedded in the gravel soil layer 2, a row of first pouring holes 61 are formed in the side wall of the horizontal pipe 6 along the axial direction of the horizontal pipe, an inner pipe 7 is rotatably connected in the horizontal pipe 6, a row of second pouring holes 71 are formed in the side wall of the inner pipe 7 along the axial direction of the inner pipe, and the first pouring holes 61 and the second pouring holes 71 are; the standpipe 33 is internally provided with a transmission assembly 8 for driving the inner pipe 7 to rotate. Before concrete is poured, the first pouring hole 61 and the second pouring hole 71 are arranged in a staggered mode, so that the possibility that broken stones and soil enter the inner pipe 7 can be reduced; before the concrete needs to be poured, the inner pipe 7 is driven to rotate through the transmission assembly 8, so that the first pouring hole 61 is aligned to the second pouring hole 71, and the horizontal pipe 6 and the gravel layer 2 can be connected more firmly.
As shown in fig. 5, the transmission assembly 8 includes a first bevel gear 81 fixed to the bottom of the screw 441 and a second bevel gear 82 fixed to one end of the inner tube 7 close to the screw 441; the first bevel gear 81 meshes with the second bevel gear 82. The screw 441 rotates to drive the first bevel gear 81 to rotate, the first bevel gear 81 rotates to drive the second bevel gear 82 to rotate, and the second bevel gear 82 rotates to drive the inner tube 7 to rotate; through setting up transmission assembly 8, be convenient for drive inner tube 7 rotates.
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 (10)
1. A construction method for widening a roadbed of a highway is characterized by comprising the following steps: the method comprises the following steps:
step 1, measuring and lofting positions needing to be widened of an original roadbed (1), marking the positions needing to be widened, digging slope surfaces along the slope angles of the original roadbed (1) step by step, gradually decreasing the width of platforms among the slope surfaces from a road surface to the bottom step by step, and setting the vertical height of the slope surfaces to be 1-2 meters;
step 2, driving timber piles with the same length as the slope surface into the bottom-layer platform along the direction parallel to the slope surface and the direction vertical to the slope surface respectively until the top surfaces of the timber piles are flush with the bottom-layer platform;
step 3, laying a geogrid on the bottom layer platform;
step 4, laying gravels on the geogrid in layers, compacting after laying the gravels with the thickness of 25-35 cm until the gravels are flush with the surface of the upper-stage platform; when the gravels are paved in layers, a mounting groove (11) is drilled on one side of the original roadbed (1) close to the gravels soil layer (2), and a connecting device (3) is mounted in the mounting groove (11); the connecting device (3) comprises a connecting pipe (31) arranged in a mounting groove (11), two through holes (311) are formed in the side wall of the connecting pipe (31), limiting blocks (32) are connected to the two through holes (311) in a sliding mode, a pouring channel (321) is formed in one side of each limiting block (32), two inserting grooves (12) are formed in the inner wall of the mounting groove (11), the two limiting blocks (32) are respectively inserted into the two inserting grooves (12), a vertical pipe (33) is communicated with one end, close to a gravel soil layer (2), of the connecting pipe (31), and the connecting device (3) further comprises a driving mechanism (4) for driving the two limiting blocks (32) to move; after the two limiting blocks (32) are respectively inserted into the two slots (12) through the driving mechanism (4), concrete is poured into the connecting pipe (31) through the vertical pipe (33), and the concrete can conveniently flow into the slots (12) through the pouring channel (321), so that the limiting blocks (32) are conveniently and fixedly connected with the slots (12);
step 5, driving the timber pile on the platform in the step 4 according to the step 2;
step 6, laying geogrids on the platform in the step 4;
7, repeating the steps 4-6 until the compacted surface is 5-10 cm lower than the surface of the original roadbed (1);
and 8, paving the gravel chips on the compacted surface, and then compacting until the gravel chips are flush with the surface of the original roadbed (1).
2. The construction method of a road widening roadbed according to claim 1, wherein the construction method comprises the following steps: in the step 4, the driving mechanism (4) comprises a driving pipe (41) rotatably connected in the connecting pipe (31) and two first connecting rods (42) hinged on the outer side wall of the driving pipe (41), and the mutually far ends of the two first connecting rods (42) are respectively hinged on the opposite ends of the two limiting blocks (32); be provided with actuating lever (43) in driving tube (41), actuating lever (43) with be provided with between driving tube (41) and be used for driving the pivoted cooperation subassembly (45) of driving tube (41), install in standpipe (33) and be used for driving actuating lever (43) drive assembly (44) that remove.
3. The construction method of a road widening roadbed according to claim 2, wherein: the driving assembly (44) comprises a lead screw (441) vertically and rotatably connected into the vertical pipe (33), a hand wheel (442) installed at the top of the lead screw (441), and a driving block (443) which is in threaded connection with the lead screw (441) and vertically slides in the vertical pipe (33); one side of the driving block (443) is hinged with a second connecting rod (445), and one end, far away from the driving block (443), of the second connecting rod (445) is hinged with one end, close to the screw rod (441), of the driving rod (43).
4. The construction method of a road widening roadbed according to claim 3, wherein the construction method comprises the following steps: a vertical rod (444) is fixedly connected in the vertical pipe (33), and the driving block (443) is connected to the vertical rod (444) in a sliding manner along the vertical direction.
5. The construction method of a road widening roadbed according to claim 3, wherein the construction method comprises the following steps: cooperation subassembly (45) include a plurality of spiral piece (451) of rigid coupling in actuating lever (43) lateral wall in proper order along the circumference of actuating lever (43), a plurality of helicla flutes (452) have been seted up in proper order along its circumference to the inner wall of driving tube (41), spiral piece (451) with helicla flute (452) one-to-one cooperation.
6. The construction method of a road widening roadbed according to claim 3, wherein the construction method comprises the following steps: the top of the lead screw (441) is fixedly connected with a square block (4411), the bottom of the hand wheel (442) is provided with a square groove (4421) for the square block (4411) to be inserted, and the side wall of the square groove (4421) is provided with a fixing component (5) for fixing the square block (4411).
7. The construction method of a road widening roadbed according to claim 6, wherein the construction method comprises the following steps: a through hole (4422) is formed in the side wall of the square groove (4421), the fixing component (5) comprises a bolt (51) connected with the through hole (4422) in a sliding mode, a jack (52) is formed in one side of the square block (4411), one end of the bolt (51) is inserted into the jack (52), and the other end of the bolt protrudes out of the outer side wall of the square groove (4421) and is fixedly connected with a handle (53); a sliding groove (54) is formed in the penetrating hole (4422), a stop block (55) is fixedly sleeved on the bolt (51), the stop block (55) is connected to the sliding groove (54) in a sliding mode along the axial direction of the penetrating hole (4422), a spring (56) is sleeved on the bolt (51), one end of the spring (56) is fixedly connected to one side, away from the square block (4411), of the stop block (55), and the other end of the spring is fixedly connected to the inner wall of one end, away from the square block (4411), of the sliding groove (54).
8. The construction method of a road widening roadbed according to claim 3, wherein the construction method comprises the following steps: the connecting part of the connecting pipe (31) and the vertical pipe (33) is communicated with a horizontal pipe (6), the horizontal pipe (6) is pre-buried in a gravel soil layer (2), the side wall of the horizontal pipe (6) is provided with a row of first pouring holes (61) along the axial direction of the horizontal pipe, the horizontal pipe (6) is rotationally connected with an inner pipe (7), the side wall of the inner pipe (7) is provided with a row of second pouring holes (71) along the axial direction of the inner pipe, and the first pouring holes (61) and the second pouring holes (71) are arranged in a one-to-one correspondence manner; and a transmission assembly (8) for driving the inner pipe (7) to rotate is arranged in the vertical pipe (33).
9. The construction method of a road widening roadbed according to claim 8, wherein the construction method comprises the following steps: the transmission assembly (8) comprises a first bevel gear (81) fixed at the bottom of the screw rod (441) in a sleeved mode and a second bevel gear (82) fixedly connected to one end, close to the screw rod (441), of the inner pipe (7); the first bevel gear (81) is meshed with the second bevel gear (82).
10. The construction method of a road widening roadbed according to claim 2, wherein: the lateral wall rigid coupling of connecting pipe (31) has pre-positioning piece (312), and mounting groove (11) are close to the one end of standpipe (33) and offer and are used for supplying pre-positioning piece (312) pre-positioning groove (13) of pegging graft, pre-positioning piece (312) pass through the bolt rigid coupling in pre-positioning groove (13).
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| CN202010853010.5A CN111910481A (en) | 2020-08-22 | 2020-08-22 | Construction method for widening roadbed of highway |
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| CN114086602A (en) * | 2021-11-27 | 2022-02-25 | 江苏中森建筑设计有限公司 | Openable road pipe network facility |
| CN114635327A (en) * | 2022-03-23 | 2022-06-17 | 广东万奥建设工程有限公司 | High-bearing-capacity municipal road based on composite piles and prefabricated plates and construction method thereof |
| CN114808580A (en) * | 2022-05-10 | 2022-07-29 | 安徽厚普建设工程有限公司 | Construction method for settlement-preventing highway subgrade in soft soil area |
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