Method for connecting new and old roadbeds of a concrete pavement

Abstract

The application discloses a connecting method for new and old roadbeds of a concrete pavement, which is matched with a cutting device, and the cutting device comprises a rack, a first supporting leg and a second supporting leg movably arranged on the rack, a longitudinal cutting assembly, a transverse cutting assembly, a cutting chain and a first motor and a second motor. The connecting method for the new and old roadbeds of the concrete pavement is characterized in that when the length of the first supporting leg and the second supporting leg is adjusted, the longitudinal cutting assembly and the transverse cutting assembly are driven to move, so that the cutting depth of the longitudinal cutting assembly is changed, the cutting width of the transverse cutting assembly is changed, and the state is adjusted to be suitable for the thickness of the soil layer, so that the soil slope is cut into reasonable steps, and the subsequent work of connecting the soil layer is performed; during the work, the rack only needs to be pushed to move along the guide rail to cut the soil slope, and then the separated soil is removed to make the soil slope present the step shape, and the operation is simple and fast.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction, in particular to a connecting method of new and old roadbeds of a concrete pavement. BACKGROUND

[0002] The roadbed is the basis of the concrete pavement, which is composed of a rammed soil layer and a cushion layer thereon, and the firmness of the roadbed directly affects the service life of the pavement.

[0003] According to the disclosure (announcement) No. CN107119522B, the disclosure (announcement) date is 2020.03.06, a construction method for connecting new and old roadbeds is disclosed, which comprises the following steps: removing the surface layer of the old roadbed slope, and excavating a step slope at the old roadbed slope; the ground at the new roadbed is leveled; a geocell is laid on the ground at the new roadbed, the end of the geocell is abutted to the edge of the step slope and fixed; the soil is filled and leveled on the geocell to form a soil layer; the lower roadbed connected with the step slope is formed by layering and rolling on the soil layer; the bidirectional geogrid is laid on the geogrid, and the bidirectional geogrid is arranged corresponding to the steps of the lower step slope; the upper roadbed connected with the step slope is formed by layering and rolling on the geogrid; and the pavement layer connected with the step slope is constructed on the upper roadbed. The present application enhances the structural strength of the new roadbed by arranging the geocell, which can ensure that the entire roadbed is in a good stress state after the load is applied; the combination of the geocell and the geogrid increases the integrity of the new and old roadbeds, reduces uneven settlement, and ensures that the roadbed and the highway are not damaged, thereby ensuring the quality of the highway. The soil layer protects the geocell from being damaged by large-diameter fillers. The upper roadbed and the lower roadbed are formed by layering and rolling, which effectively improves the structural density of the new roadbed and further reduces the settlement

[0004] In the prior art including the above-mentioned patent, when the concrete pavement is widened, the roadbed needs to be widened first, the cushion layer on the roadbed slope is removed, only the soil slope is left, and then the soil slope is excavated into a ladder shape to connect with the soil layer of the new roadbed. At present, the soil layer at the connecting position is excavated into a ladder shape by manual or small excavators, which consumes a lot of time. SUMMARY

[0005] The purpose of the present application is to provide a connecting method of new and old roadbeds of a concrete pavement, which aims to solve the problem that the soil slope of the roadbed needs to consume a lot of time when excavated into a ladder shape.

[0006] In order to achieve the above object, the present application provides a method for connecting new and old roadbeds of a concrete pavement, which is matched with a cutting device, the cutting device comprising a frame and a first supporting leg and a second supporting leg movably mounted on the frame, a longitudinal cutting assembly, a transverse cutting assembly, a cutting chain and a first motor and a second motor, comprising the following steps:

[0007] S1, removing the cushion layer on the old roadbed slope, leaving only the soil layer, tamping the roadbed beside the slope, and placing guide rails above and below the slope;

[0008] S2, digging a ladder-shaped notch on the soil layer slope, placing the frame on the notch, and abutting the frame on the guide rail, and then driving the first supporting leg and the second supporting leg to move downward and abut on the guide rail;

[0009] S3, changing the cutting depth of the longitudinal cutting assembly and the cutting width of the transverse cutting assembly when the first supporting leg and the second supporting leg move downward, so as to match the ladder-shaped notch;

[0010] S4, the first motor and the second motor work, driving the cutting chain on the longitudinal cutting assembly and the transverse cutting assembly to cut the soil;

[0011] S5, pushing the frame to move along the guide rail, and then removing the cut soil on the soil slope, and the soil slope presents a ladder shape for the next connecting work.

[0012] As a preferred, comprising a frame, the frame is respectively provided with:

[0013] a plurality of longitudinal cutting assemblies for longitudinally cutting the soil slope;

[0014] a plurality of transverse cutting assemblies for transversely cutting the soil slope;

[0015] the cutting lines of the plurality of longitudinal cutting assemblies intersect with the cutting lines of the plurality of transverse cutting assemblies, so that the soil slope is cut into a ladder shape.

[0016] As a preferred, the longitudinal cutting assembly and the transverse cutting assembly both comprise:

[0017] a pair of movable rods movably mounted on the frame;

[0018] a pair of cutting chains movably arranged between the pair of movable rods for cutting the soil slope;

[0019] the pair of movable rods are driven to move to change the cutting depth of the longitudinal cutting assembly or the cutting width of the transverse cutting assembly.

[0020] As preferred, a plurality of first motors are arranged on the frame for driving the plurality of longitudinal cutting assemblies to work, a second synchronizing rod is arranged on the output end of the first motor, a second sprocket corresponding to the longitudinal cutting assembly is movably arranged on the second synchronizing rod, and the second sprocket cooperates with a pair of the movable rods to support the cutting chain.

[0021] As preferred, a second motor is arranged on the frame for driving the plurality of transverse cutting assemblies to work, a second synchronizing rod is arranged on the output end of the second motor, a second sprocket corresponding to the transverse cutting assembly is movably arranged on the second synchronizing rod, and the second sprocket cooperates with a pair of the movable rods to support the cutting chain.

[0022] As preferred, a first leg and a second leg are movably arranged on the frame and abut against the guide rail, the first leg is driven to move downward to increase the cutting depth of the plurality of longitudinal cutting assemblies, and the second leg is driven to move downward to increase the cutting width of the plurality of transverse cutting assemblies.

[0023] As preferred, the longitudinal cutting assembly comprises a first connecting rod movably arranged on the frame, a pair of the movable rods are movably arranged on the frame and the first connecting rod respectively, a first pushing rod for pushing the plurality of first connecting rods is movably arranged on the first leg, and the first leg is driven to move downward to increase the cutting depth of the plurality of longitudinal cutting assemblies.

[0024] As preferred, the transverse cutting assembly comprises a second connecting rod movably arranged on the second leg, a pair of the movable rods are movably arranged on the second leg and the second connecting rod respectively, a second pushing rod for pushing the plurality of second connecting rods is movably arranged on the second leg, and the second leg is driven to move downward to increase the cutting width of the plurality of transverse cutting assemblies.

[0025] As preferred, a driving assembly is movably arranged on the frame and used for driving the first leg and the second leg to move, the driving assembly comprises a plurality of racks corresponding to the first leg and the second leg respectively, a plurality of links are arranged between the rack and the corresponding leg, and the link comprises the following two states:

[0026] In the first state, the link is in a non-vertical state, and adjacent two links can rotate freely;

[0027] In the second state, the link is in a vertical state, and adjacent two links are locked.

[0028] As preferred, a mortise and tenon groove is formed on the chain link, a tenon is movably arranged inside the mortise and tenon groove, a reed is movably arranged inside the frame for driving the tenon, and the reed drives the tenon to span two chain links when the chain link is switched from the first state to the second state.

[0029] In the above technical solution, the connecting method of the new and old roadbeds of the concrete pavement has the following beneficial effects: when the lengths of the first and second legs are adjusted, the longitudinal and transverse cutting assemblies are moved to change the cutting depth of the longitudinal cutting assembly and the cutting width of the transverse cutting assembly, and are adjusted to the state suitable for the thickness of the soil layer, so that the soil slope is cut into a reasonable ladder shape for subsequent soil layer connection work; during work, the frame only needs to be pushed along the guide rail to cut the soil slope, and then the separated soil is removed to make the soil slope present a ladder shape, which is simple and fast. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0031] Figure 1 The overall structure schematic diagram provided by the embodiments of the present application is shown in the figure;

[0032] Figure 2 The internal structure schematic diagram of the longitudinal cutting assembly provided by the embodiments of the present application is shown in the figure;

[0033] Figure 3 The Figure 2 The enlarged view of A in the figure;

[0034] Figure 4 The structure schematic diagram of the driving assembly provided by the embodiments of the present application is shown in the figure;

[0035] Figure 5 Figure 4 The enlarged view of B in the figure;

[0036] Figure 6 Figure 4 The enlarged view of C in the figure;

[0037] Figure 7 The internal structure schematic diagram of the transverse cutting assembly provided by the embodiments of the present application is shown in the figure;

[0038] Figure 8 Figure 7 The enlarged view of D in the figure;

[0039] Figure 9 The structural diagram under the rack provided by the embodiment of the present application.

[0040] Mark explanation:

[0041] 1, rack; 11, longitudinal cutting assembly; 111, first movable sleeve; 112, first connecting rod; 113, movable rod; 114, first sprocket; 115, first spring; 116, guide rod; 118, second spring; 12, transverse cutting assembly; 121, second movable sleeve; 122, second connecting rod; 123, first synchronous rod; 124, third spring; 125, pull rope; 126, sliding rod; 127, second push rod; 131, first leg; 132, second leg; 133, movable plate; 134, first push rod; 135, threaded telescopic rod; 141, hand wheel; 142, gear; 143, rack; 144, chain link; 145, tenon block; 146, reed; 147, lock rod; 21, first motor; 22, second motor; 23, second synchronous rod; 24, second sprocket; 3, cutting chain. DETAILED DESCRIPTION

[0042] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0043] As shown in Figures 1-9 A connecting method of new and old roadbeds of a concrete pavement, which is matched with a cutting device, the cutting device comprising a rack 1 and a first leg 131, a second leg 132, a longitudinal cutting assembly 11, a transverse cutting assembly 12, a cutting chain 3 and a first motor 21 and a second motor 22 movably installed on the rack 1, comprising the following steps:

[0044] S1, removing the cushion layer on the slope of the old roadbed, leaving only the soil layer, tamping the roadbed beside the slope, and placing guide rails above and below the slope;

[0045] S2, digging a ladder-shaped notch on the soil layer slope, placing the rack 1 on the notch, and abutting the rack 1 on the guide rails, and then driving the first leg 131 and the second leg 132 to move downward and abut on the guide rails;

[0046] S3, changing the cutting depth of the longitudinal cutting assembly 11 and the cutting width of the transverse cutting assembly 12 when the first leg 131 and the second leg 132 move downward, so as to match the ladder-shaped notch;

[0047] S4, the first motor 21 and the second motor 22 work, driving the cutting chain 3 on the longitudinal cutting assembly 11 and the transverse cutting assembly 12 to cut the soil;

[0048] S5, push the frame 1, make it move along the guide rail, remove the cut soil on the soil slope, and the soil slope presents a ladder shape to facilitate the next connecting work.

[0049] Specifically, when widening the road, the cushion on the slope beside the roadbed needs to be removed, only the soil slope is left, and then the soil slope is excavated into a ladder shape by artificial or small excavators, and then the new roadbed is paved and rolled layer by layer to be closely combined with the soil slope, which is the prior art and will not be described.

[0050] Further, when widening the roadbed, the cushion on the slope of the old roadbed is removed, only the soil layer is left, the roadbed beside the slope is rammed, and guide rails are placed on the top and bottom of the slope respectively to guide the cutting device, then a ladder-shaped gap is excavated on the soil slope, and the frame 1 is placed in the gap, and the frame 1 is in a horizontal state and abuts against the upper guide rail, and then the first leg 131 and the second leg 132 are driven to move downward to abut against the lower guide rail, and when the first leg 131 and the second leg 132 move downward, the cutting depth of the longitudinal cutting assembly 11 and the cutting width of the transverse cutting assembly 12 are changed, so that the soil layer of the thickness can be cut into a reasonable ladder shape, and then the first motor 21 and the second motor 22 are driven to work to drive the cutting chains 3 on the longitudinal cutting assembly 11 and the transverse cutting assembly 12 to cut the soil, and the frame 1 is pushed to move along the guide rail to divide the soil slope, and then the cut soil on the soil slope is removed, and the soil slope presents a ladder shape to facilitate the next connecting work.

[0051] In the above technical solution, when the length of the first leg 131 and the second leg 132 is adjusted, the longitudinal cutting assembly 11 and the transverse cutting assembly 12 are moved to change the cutting depth of the longitudinal cutting assembly 11 and the cutting width of the transverse cutting assembly 12, and are adjusted to the state suitable for the thickness of the soil layer, so as to cut the soil slope into a reasonable ladder shape to facilitate the subsequent connecting work of the soil layer; during work, only the frame 1 needs to be pushed to move along the guide rail to cut the soil slope, and then the divided soil is removed to make the soil slope present a ladder shape, which is simple and fast.

[0052] As further provided in the embodiments of the application, the frame 1 is provided with:

[0053] A plurality of longitudinal cutting assemblies 11 for longitudinally cutting the soil slope;

[0054] A plurality of transverse cutting assemblies 12 for transversely cutting the soil slope;

[0055] The cutting lines of the plurality of longitudinal cutting assemblies 11 intersect with the cutting lines of the plurality of transverse cutting assemblies 12, so that the soil slope is cut into a ladder shape.

[0056] The longitudinal cutting assembly 11 corresponds to the transverse cutting assembly 12, and a first synchronizing rod 123 is arranged between the corresponding two, which limits the longitudinal cutting assembly 11 and the transverse cutting assembly 12, so that the cutting lines of the longitudinal cutting assembly 11 and the transverse cutting assembly 12 intersect and do not excessively penetrate into the soil area that does not need to be cut.

[0057] Specifically, when the height of the first leg 131 and the second leg 132 is adjusted, the longitudinal cutting assembly 11 and the transverse cutting assembly 12 are moved, and the longitudinal cutting assembly 11 and the corresponding transverse cutting assembly 12 are affected by the first synchronizing rod 123, so that the cutting lines of the longitudinal cutting assembly 11 and the transverse cutting assembly 12 intersect and do not excessively penetrate into the soil area that does not need to be cut.

[0058] As further provided in another embodiment of the present application, the longitudinal cutting assembly 11 and the transverse cutting assembly 12 each include:

[0059] a pair of movable rods 113 movably mounted on the frame 1;

[0060] a cutting chain 3 movably arranged between the pair of movable rods 113 for cutting the soil slope;

[0061] The pair of movable rods 113 are driven to move to change the cutting depth of the longitudinal cutting assembly 11 or the cutting width of the transverse cutting assembly 12.

[0062] The movable rod 113 is provided with a first sprocket 114, and the two first sprockets 114 are provided with a cutting chain 3, and the end of the movable rod 113 is provided with a slope, which can be better inserted into the gap cut by the cutting chain 3.

[0063] Specifically, when the first leg 131 and the second leg 132 move, the pairs of movable rods 113 are moved, so that the distance between any pair of movable rods 113 increases, and the corresponding cutting surface of the cutting chain 3 is also longer, so that the cutting depth of the longitudinal cutting assembly 11 increases, and the cutting width of the transverse cutting assembly 12 increases.

[0064] Further, the driving mode in the above embodiment can be that electric telescopic rods are arranged between the pair of movable rods 113, one of the movable rods 113 is slidingly installed on the rack 1, and a first synchronous rod 123 is arranged between the movable rod 113 on the longitudinal cutting assembly 11 away from the rack 1 and the movable rod 113 on the corresponding transverse cutting assembly 12 away from the rack 1, when the first supporting leg 131 and the second supporting leg 132 are extended from the rack 1, the plurality of electric telescopic rods are elongated, the electric telescopic rod on the transverse cutting assembly 12 drives the longitudinal cutting assembly 11 to move transversely on the rack 1 through the first synchronous rod 123, and the electric telescopic rod on the longitudinal cutting assembly 11 drives the transverse cutting assembly 12 to move downward along the rack 1 through the first synchronous rod 123.

[0065] As further provided by the application, a plurality of first motors 21 for driving the plurality of longitudinal cutting assemblies 11 to work are arranged on the rack 1, a second synchronous rod 23 is arranged on the output end of the first motor 21, a second sprocket 24 corresponding to the longitudinal cutting assembly 11 is movably arranged on the second synchronous rod 23, and the second sprocket 24 cooperates with the pair of movable rods 113 to support the cutting chain 3.

[0066] Specifically, when the first supporting leg 131 and the second supporting leg 132 are driven to move downward, the longitudinal cutting assembly 11 drives the second sprocket 24 to move along the second synchronous rod 23 through the cutting chain 3; when the earth is cut, the first motor 21 drives the second synchronous rod 23 to rotate, thereby driving the plurality of second sprockets 24 to rotate, the second sprocket 24 cooperates with the two first sprockets 114 to support the cutting chain 3, and the second sprocket 24 drives the cutting chain 3 to rotate and cut the earth.

[0067] As further provided by the application, a second motor 22 for driving the plurality of transverse cutting assemblies 12 to work is arranged on the rack 1, a second synchronous rod 23 is arranged on the output end of the second motor 22, a second sprocket 24 corresponding to the transverse cutting assembly 12 is movably arranged on the second synchronous rod 23, and the second sprocket 24 cooperates with the pair of movable rods 113 to support the cutting chain 3.

[0068] Specifically, when the first supporting leg 131 and the second supporting leg 132 are driven to move downward, the transverse cutting assembly 12 drives the second sprocket 24 to move along the second synchronous rod 23 through the cutting chain 3; when the earth is cut, the first motor 21 drives the second synchronous rod 23 to rotate, thereby driving the plurality of second sprockets 24 to rotate, the second sprocket 24 cooperates with the two first sprockets 114 to support the cutting chain 3, and the second sprocket 24 drives the cutting chain 3 to rotate and cut the earth.

[0069] As further provided by the present application, the first leg 131 and the second leg 132 are movably arranged on the frame 1 and abut against the guide rails, the first leg 131 is driven to move downward to increase the cutting depth of the plurality of longitudinal cutting assemblies 11, and the second leg 132 is driven to move downward to increase the cutting width of the plurality of transverse cutting assemblies 12.

[0070] Specifically, when the first leg 131 and the second leg 132 are driven to move, the first leg 131 drives one of the pair of movable rods 113 on the longitudinal cutting assembly 11 to move away from the frame 1, so as to increase the cutting depth of the longitudinal cutting assembly 11, and the movable rod 113 drives the transverse cutting assembly 12 to move downward through the first synchronous rod 123, so as to intersect the cutting line of the longitudinal cutting assembly 11; the second leg 132 drives one of the pair of movable rods 113 on the transverse cutting assembly 12 to move away from the frame 1, so as to increase the cutting width of the transverse cutting assembly 12, and the movable rod 113 drives the longitudinal cutting assembly 11 to move laterally along the frame 1 through the first synchronous rod 123, so as to intersect the cutting line of the longitudinal cutting assembly 11.

[0071] As further provided by the present application, the longitudinal cutting assembly 11 comprises a first connecting rod 112 movably arranged on the frame 1, a pair of movable rods 113 movably arranged on the frame 1 and the first connecting rod 112 respectively, and a first pushing rod 134 movably arranged on the first leg 131 and used to push the plurality of first connecting rods 112, the first leg 131 is driven to move downward to increase the cutting depth of the plurality of longitudinal cutting assemblies 11.

[0072] The longitudinal cutting assembly 11 comprises a first movable sleeve 111 slidably arranged on the frame 1, the first connecting rod 112 is movably arranged on the first movable sleeve 111, the second spring 118 is arranged between the first connecting rod 112 and the first movable sleeve 111, the movable plate 133 is arranged on the first leg 131, the first pushing rod 134 is slidably arranged on the movable plate 133 and used to push the first connecting rod 112, the first pushing rod 134 is inserted into the first movable sleeve 111 and passes through the second spring 118 to abut against the first connecting rod 112, one of the movable rods 113 on the longitudinal cutting assembly 11 is slidably arranged on the first movable sleeve 111 and is provided with the first spring 115 between the first movable sleeve 111 and the movable rod 113, and the other movable rod 113 is slidably arranged on the first connecting rod 112 and is provided with the first spring 115 between the first connecting rod 112 and the movable rod 113, the guide rod 116 is arranged on the movable rod 113 and used to guide the first spring 115 to stretch and contract.

[0073] Specifically, when the first leg 131 is driven to move downward, the movable plate 133 is moved downward, the first pushing rod 134 on the movable plate 133 pushes the first connecting rod 112 to move downward, and the second spring 118 is stretched, at this time, the distance between the pair of movable rods 113 on the same longitudinal cutting assembly 11 is increased, the longitudinal cutting depth is increased, and the length of the cutting chain 3 is fixed, the second sprocket 24 pulls the cutting chain 3, the first sprocket 114 is close to the first connecting rod 112, and the first spring 115 is compressed, the first spring 115 pushes the movable rod 113, and the cutting chain 3 is kept in a tight state to cut the soil.

[0074] As further provided by the present application, the transverse cutting assembly 12 includes a second connecting rod 122 movably mounted on the second leg 132, a pair of movable rods 113 movably mounted on the second leg 132 and the second connecting rod 122 respectively, and a second pushing rod 127 movably arranged on the second leg 132 for pushing a plurality of second connecting rods 122, and the second leg 132 is driven to move downward to increase the cutting width of the plurality of transverse cutting assemblies 12.

[0075] The transverse cutting assembly 12 includes a second movable sleeve 121 slidably mounted on the telescopic second leg 132, the second connecting rod 122 is slidably arranged on the second movable sleeve 121, the third spring 124 is arranged between the second connecting rod 122 and the telescopic second movable sleeve 121, the first synchronous rod 123 is arranged between the second connecting rod 122 on the transverse cutting assembly 12 and the first connecting rod 112 on the corresponding longitudinal cutting assembly 11, one of the pair of movable rods 113 on the transverse cutting assembly 12 is slidably mounted on the second movable sleeve 121 and arranged with the first spring 115 between the second movable sleeve 121, and the other movable rod 113 is slidably mounted on the end of the second connecting rod 122 and arranged with the first spring 115 between the second connecting rod 122, the slide rod 126 is slidably arranged on the second leg 132, the second pushing rod 127 for pushing the second connecting rod 122 is arranged on the slide rod 126, and the pull rope 125 is arranged transversely through the second leg 132 and fixedly mounted on the rack 1.

[0076] Specifically, when the second leg 132 is driven to move downward, the pull rope 125 is pulled, the slide rod 126 moves to the inside of the second movable sleeve 121, and the second connecting rod 122 is pushed by the second pushing rod 127, so that the movable rod 113 on the second connecting rod 122 moves away from the second leg 132, the cutting width of the transverse cutting assembly 12 is increased, and the second connecting rod 122 drives the first connecting rod 112 on the corresponding longitudinal cutting assembly 11 to move along the rack 1 transversely, away from the first leg 131, the distance between a pair of movable rods 113 on the same transverse cutting assembly 12 is increased, the transverse cutting width is increased, and the length of the cutting chain 3 is fixed, the second sprocket 24 pulls the cutting chain 3, the first sprocket 114 is close to the first connecting rod 112, and the first spring 115 is compressed, the first spring 115 pushes the movable rod 113, so that the cutting chain 3 is kept in a tight state to cut the raw soil.

[0077] As further provided by the present application, another embodiment further includes a driving assembly movably mounted on the rack 1 and used to drive the first leg 131 and the second leg 132 to move, the driving assembly includes a plurality of racks 143 corresponding to the first leg 131 and the second leg 132 respectively, a plurality of links 144 are arranged between the rack 143 and the corresponding leg, and the link 144 includes the following two states:

[0078] The first state is that the link 144 is in a non-vertical state, and the adjacent two links 144 can rotate freely;

[0079] The second state is that the link 144 is in a vertical state, and the adjacent two links 144 are locked.

[0080] The inside of the rack 1 is provided with a sliding groove for guiding the movement of the link 144, the inside of the rack 1 is movably provided with a gear 142 engaged with the two racks 143, the gear 142 extends to the outside of the rack 1 and is provided with a hand wheel 141, and the gear 142 is slidably provided with a locking rod 147.

[0081] Specifically, when the first leg 131 and the second leg 132 are driven to move downward, the hand wheel 141 is rotated, the hand wheel 141 drives the gear 142 to rotate, and the rack 143 is pushed to move, the rack 143 pushes the link 144 to move along the sliding groove in the inside of the rack 1, and gradually switches from the first state to the second state, and pushes the first leg 131 and the second leg 132 to move downward, and changes the cutting depth of the longitudinal cutting assembly 11 and the cutting width of the transverse cutting assembly 12.

[0082] As further provided by the present application, the link 144 is provided with a mortise, and a tenon 145 is movably arranged in the mortise, and the rack 146 is movably arranged in the housing 1 and used to push the tenon 145, when the link 144 is switched from the first state to the second state, the rack 146 pushes the tenon 145 to cross the two links 144.

[0083] Specifically, when widening the roadbed, the cushion layer on the slope of the old roadbed is removed, and only the soil layer is left, the roadbed beside the slope is rammed, and the guide rails for guiding the cutting device are arranged at the top and bottom of the slope, then the stepped gap is excavated on the soil layer slope, and the housing 1 is arranged on the gap, and the housing 1 is in a horizontal state and abuts against the upper guide rail;

[0084] Then the hand wheel 141 is rotated to drive the gear 142 to rotate and push the rack 143 to move, the rack 143 pushes the link 144 to move along the sliding groove in the housing 1, the link 144 is gradually switched from the non-vertical state to the vertical state when moving along the sliding groove, and when moving downward in the vertical state, the rack 146 on the housing 1 pushes the tenon 145 on the link 144 to make the tenon 145 inserted into the adjacent link 144 above, so that the tenon 145 crosses the two links 144, and the link 144 is locked together to become a vertical rod, and pushes the first leg 131 and the second leg 132 to move downward and abut against the lower guide rail, after adjustment, the lock rod 147 is pushed to be inserted into the housing 1 to lock the gear 142;

[0085] When the first leg 131 is driven to move downward, the movable plate 133 is driven to move downward, the first pushing rod 134 on the movable plate 133 pushes the first connecting rod 112 to move downward and stretches the second spring 118, at this time, the distance between the pair of movable rods 113 on the same longitudinal cutting assembly 11 is increased, and the longitudinal cutting depth is increased, and the length of the cutting chain 3 is fixed, the second sprocket 24 pulls the cutting chain 3 to make the first sprocket 114 close to the first connecting rod 112 and compress the first spring 115, the first spring 115 pushes the movable rod 113 to keep the cutting chain 3 in a tight state, so as to cut the soil, and when moving, the first synchronous rod 123 drives the transverse cutting assembly 12 to move downward along the second leg 132, so that the transverse cutting assembly 12 intersects with the cutting line of the longitudinal cutting assembly 11;

[0086] When the second leg 132 is driven to move downward, the pull rope 125 is pulled, the slide rod 126 is moved to the inside of the second movable sleeve 121, the second connecting rod 122 is pushed by the second pushing rod 127, the movable rod 113 on the second connecting rod 122 is moved away from the second leg 132, the cutting width of the transverse cutting assembly 12 is increased, the first connecting rod 112 on the corresponding longitudinal cutting assembly 11 is driven by the first synchronous rod 123 to move along the rack 1, and the distance between the pair of movable rods 113 on the same transverse cutting assembly 12 is increased, the transverse cutting width is increased, the length of the cutting chain 3 is fixed, the second sprocket 24 pulls the cutting chain 3, the first sprocket 114 is close to the first connecting rod 112, and the first spring 115 is compressed, the first spring 115 pushes the movable rod 113, and the cutting chain 3 is kept in a tight state to cut the raw soil;

[0087] The first motor 21 and the second motor 22 are further driven to work, the second sprocket 24 is driven to rotate by the second synchronous rod 23, the first sprocket 114 on the longitudinal cutting assembly 11 and the transverse cutting assembly 12 is matched, the cutting chain 3 on the longitudinal cutting assembly 11 and the transverse cutting assembly 12 is driven to cut the raw soil, and the rack 1 is pushed to move along the guide rail, the raw soil slope is divided, the cut soil on the raw soil slope is removed, and the raw soil slope is in a ladder shape to facilitate the next connecting work.

[0088] As further provided by the application, the two racks 143 are staggered, the gear 142 is axially slidably arranged on the rack 1, and the gear 142 is transversely arranged on the two racks 143 and engaged with the two racks 143.

[0089] Specifically, when only the longitudinal cutting depth or the transverse cutting width needs to be adjusted, the hand wheel 141 is pulled, the gear 142 is engaged with only one rack 143, at this time, the hand wheel 141 is rotated to independently adjust the longitudinal cutting depth or the transverse cutting width, after the adjustment is completed, the hand wheel 141 is pushed, the gear 142 is engaged with the two racks 143, the lock rod 147 is pushed, the gear 142 and the rack 143 are locked, and the threaded telescopic rod 135 is rotated to keep the first leg 131 and the second leg 132 at the same length to contact the guide rail.

[0090] The above describes certain exemplary embodiments of the application by way of illustration only, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the application.

Claims

1. A method of connecting a new concrete pavement to an existing subgrade, characterized by, It is matched with a cutting device, the cutting device includes a rack and a first supporting leg, a second supporting leg, a longitudinal cutting assembly, a transverse cutting assembly, a cutting chain and a first motor and a second motor which are movably installed on the rack, and the method comprises the following steps: S1, remove the cushion layer on the old roadbed slope, only leave the soil layer, tamp the roadbed beside the slope, and place guide rails above and below the slope; S2, dig a ladder-shaped notch on the soil layer slope, and place the rack on the notch, and the rack abuts against the guide rails, and then drive the first supporting leg and the second supporting leg to move downward and abut against the guide rails; S3, change the cutting depth of the longitudinal cutting assembly and the cutting width of the transverse cutting assembly when the first supporting leg and the second supporting leg move downward, so as to fit the ladder-shaped notch; The rack is respectively provided with: A plurality of longitudinal cutting assemblies for longitudinally cutting the soil slope; A plurality of transverse cutting assemblies for transversely cutting the soil slope; The cutting lines of the plurality of longitudinal cutting assemblies intersect with the cutting lines of the plurality of transverse cutting assemblies, so that the soil slope is cut into a ladder shape, and a first synchronization rod is arranged between the movable rod on the longitudinal cutting assembly away from the rack and the movable rod on the corresponding transverse cutting assembly away from the rack; The longitudinal cutting assembly and the transverse cutting assembly each include: A pair of movable rods movably installed on the rack; A cutting chain movably arranged between the pair of movable rods for cutting the soil slope; The pair of movable rods are driven to move to change the cutting depth of the longitudinal cutting assembly or the cutting width of the transverse cutting assembly; The first supporting leg and the second supporting leg movably arranged on the rack abut against the guide rails, the first supporting leg is driven to move downward to increase the cutting depth of the plurality of longitudinal cutting assemblies, and the second supporting leg is driven to move downward to increase the cutting width of the plurality of transverse cutting assemblies; The longitudinal cutting assembly includes a first movable sleeve slidingly installed on the rack, a first connecting rod movably arranged on the first movable sleeve, a second spring arranged between the first connecting rod and the first movable sleeve, an activity plate arranged on the first supporting leg, a first pushing rod slidingly arranged on the activity plate for pushing the first connecting rod, the first pushing rod is inserted into the first movable sleeve and passes through the second spring to abut against the first connecting rod, one of the movable rods on the longitudinal cutting assembly is slidingly installed on the first movable sleeve and is provided with a first spring between the first movable sleeve and the first connecting rod, the other movable rod is slidingly installed on the first connecting rod and is provided with a first spring between the first connecting rod and the first connecting rod, and a guide rod is arranged on the movable rod for guiding the expansion and contraction of the first spring; The transverse cutting assembly comprises a second movable sleeve slidingly mounted on the telescopic second leg, a second connecting rod slidingly arranged on the second movable sleeve, a third spring arranged between the second connecting rod and the telescopic second movable sleeve, a first synchronizing rod arranged between the second connecting rod of the transverse cutting assembly and the first connecting rod of the corresponding longitudinal cutting assembly, one of the pair of movable rods of the transverse cutting assembly slidingly mounted on the second movable sleeve and provided with a first spring between the second movable sleeve, and the other movable rod slidingly mounted on the end of the second connecting rod and provided with a first spring between the second connecting rod, a sliding rod slidingly arranged on the second leg, a second pushing rod arranged on the sliding rod and used for pushing the second connecting rod, and a pull rope transversely arranged on the second leg and fixedly mounted on the rack; S4, the first motor and the second motor work to drive the cutting chain of the longitudinal cutting assembly and the transverse cutting assembly to cut the raw soil; S5, the rack is pushed to move along the guide rail, and the cut soil on the raw soil slope is removed, and the raw soil slope is in a stepped shape to facilitate the next connecting work.

2. The method of claim 1, wherein the method further comprises: providing a plurality of concrete blocks; and placing the plurality of concrete blocks on the new subgrade. A plurality of first motors for driving the plurality of longitudinal cutting assemblies are arranged on the rack, a second synchronizing rod is arranged on the output end of the first motor, a second sprocket corresponding to the longitudinal cutting assembly is movably arranged on the second synchronizing rod, and the second sprocket cooperates with a pair of movable rods to support the cutting chain.

3. The method of claim 1, wherein the method further comprises: providing a plurality of concrete blocks; and placing the plurality of concrete blocks on the new subgrade. A second motor for driving the plurality of transverse cutting assemblies is arranged on the rack, a second synchronizing rod is arranged on the output end of the second motor, a second sprocket corresponding to the transverse cutting assembly is movably arranged on the second synchronizing rod, and the second sprocket cooperates with a pair of movable rods to support the cutting chain.

4. The method of claim 1, wherein the method further comprises: providing a plurality of concrete blocks; and placing the plurality of concrete blocks on the new subgrade. A driving assembly movably mounted on the rack and used for driving the first leg and the second leg to move is further included, the driving assembly comprises a rack corresponding to the first leg and the second leg respectively, a plurality of chain links are arranged between the rack and the corresponding leg, and the chain link comprises the following two states: In a first state, the chain link is in a non-vertical state, and two adjacent chain links can rotate freely; In a second state, the chain link is in a vertical state, and two adjacent chain links are locked.

5. The method of claim 4, wherein the method further comprises: 5 providing a plurality of concrete blocks having a plurality of holes formed therein; 0 inserting a plurality of dowels into the plurality of holes; and 5 inserting a plurality of dowel bars into the plurality of dowels. A mortise is arranged in the chain link, a tenon block is movably arranged in the mortise, a reed for pushing the tenon block is movably arranged in the rack, and when the chain link is switched from the first state to the second state, the reed pushes the tenon block to span two chain links.

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