Roadbed slope construction process

Abstract

The application relates to the technical field of roadbed slopes, and provides a roadbed slope construction process, which comprises the following steps: step S1, construction preparation: according to drawing and surveying datum and surveying marks provided by an on-site supervision office engineer, conducting traverse surveying, level surveying and roadbed middle stake surveying, and summarizing surveying results; step S2, construction lofting: lofting a roadbed center line and a filling slope foot line by using coordinate lofting method, and calculating a slope foot position according to a setting drawing height ratio; step S3, slope surface construction: line laying and slope brushing, leveling after laying a cushion, installing a formwork according to the size of a reserved expansion joint, then pouring concrete, and after the concrete is dry, the formwork is disassembled; step S4, installing elastic filling strips: the concrete layers on the two sides of the expansion joint are both provided with connecting rods, and one end of the connecting rod away from the concrete layer extends into the expansion joint. The application has the beneficial effect of improving the protection effect on the roadbed slope.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roadbed slope, in particular to a roadbed slope construction process. BACKGROUND

[0002] The stability of the roadbed slope in the road and bridge engineering construction directly affects the safety and service life of the entire project. The cast-in-place concrete slope has strong integrity. In order to reduce the problem of expansion and cracking of the concrete structure caused by temperature change in the use process of the cast-in-place concrete slope, the expansion joint needs to be set in the cast-in-place concrete slope.

[0003] In the existing roadbed slope expansion joint construction, the expansion joint is usually filled with fillers, such as polyethylene closed-cell foam board material and organic materials such as polysulfide sealant or expansion plate. By closing the expansion joint with the fillers, rainwater can be reduced to penetrate into the slope below through the expansion joint, so as to reduce soil erosion. However, with the increase of the service life of the slope, the fillers will age. When the width of the expansion joint changes due to temperature change, the polyethylene closed-cell foam board and the polysulfide sealant are difficult to deform to close the expansion joint with the change of the width of the expansion joint, so that rainwater penetrates into the slope below through the gap between the expansion joint side wall and the filler, and aggravates the soil erosion of the slope. SUMMARY

[0004] In order to improve the protection effect of the roadbed slope, the present application provides a roadbed slope construction process.

[0005] The roadbed slope construction process provided by the present application adopts the following technical scheme:

[0006] A roadbed slope construction process comprises the following steps:

[0007] Step S1, construction preparation: according to the drawing and the surveying and setting datum and measurement marks provided by the resident supervision office engineer, the traverse survey, level survey and roadbed middle stake survey are carried out, and the measurement results are summarized;

[0008] Step S2, construction lofting: the roadbed center line and the filling slope toe line are lofted by coordinate lofting method, and the setting drawing height and the calculated slope toe position are set according to the setting drawing height and the calculated slope toe position;

[0009] Step S3, slope construction: line laying and slope brushing, laying cushion and then scraping, installing the formwork according to the size of the reserved expansion joint, then pouring concrete, and after the concrete is dry, the formwork is removed to form a concrete layer;

[0010] Step S4, installing the elastic filling strip: the concrete layers on both sides of the expansion joint are provided with connecting rods, the ends of the connecting rods away from the concrete layers extend into the expansion joint, and then the pre-processed elastic filling strip is installed in the expansion joint along the length direction of the expansion joint through the sealant; wherein the elastic filling strip comprises two first and second filling strips abutting each other, the surfaces of the first and second filling strips close to each other are convexly provided with a plurality of convex strips abutting each other in sequence, the convex strips are provided along the full length of the elastic filling strip, and the convex strips are provided with slits along the full length of the convex strips; wherein the connecting rods are inserted into the slots provided on the opposite two side walls of the first filling strip during the installation of the elastic filling strip in the expansion joint; after installation, the sealant is filled between the elastic filling strip and the two concrete layers, and the sealant is filled in the slots.

[0011] By adopting the above technical scheme, the expansion joint is filled and closed by the elastic filling strip and the sealant, so as to reduce the penetration of water from the outside into the soil through the expansion joint, thereby improving the protection effect on the slope. Since the concrete layer will expand and contract with temperature changes, the width of the expansion joint will increase or decrease. In this regard, the elastic filling strip comprises the first and second filling strips, and the convex strips and the slits are correspondingly provided to abut each other. Since the two ends of the connecting rod are respectively inserted into the concrete layer and the elastic filling strip, the elastic filling strip is driven to deform along the width direction of the expansion joint when the concrete layer contracts, thereby improving the closed state of the expansion joint.

[0012] The slits are provided on the abutting convex strips, and the aging rate is relatively low compared to providing the slits on the outer surface of the elastic filling strip, thereby improving the service life of the elastic filling strip.

[0013] Preferably, in the step S4, the end of the connecting rod away from the concrete layer is provided with a first limiting piece, the top wall of the slot is provided with a clamping groove for clamping the first limiting piece, the sealant is filled in the clamping groove, and the slot extends to the lower surface of the first filling strip.

[0014] By adopting the above technical scheme, the slot extends to the lower surface of the first filling strip, so that when the elastic filling strip is placed in the expansion joint, the connecting rod is inserted into the slot, and the first limiting piece is inserted into the clamping groove, thereby improving the connection strength between the connecting rod and the elastic filling strip, so as to stretch or extrude with the expansion and contraction of the expansion joint.

[0015] Preferably, the cross section of the convex strip is V-shaped, the slits are provided at the tips of the convex strips, and extend towards the surfaces of the first and second filling strips away from each other, respectively.

[0016] By adopting the technical scheme, the cross section of the convex strip is in V shape, the length of the slit is increased, the range of deformation of the elastic filling strip along with the expansion joint is increased, and the protection effect on the expansion joint is improved.

[0017] Preferably, the convex strip arranged on the first filling strip is a first convex strip, and the convex strip arranged on the second filling strip is a second convex strip; correspondingly, the slit arranged on the first convex strip is a first slit, and the slit arranged on the second convex strip is a second slit; the elastic filling strip further comprises an elastic rope arranged between the first filling strip and the second filling strip, the elastic rope is arranged at intervals along the length direction of the elastic filling strip; the elastic rope is used to pull the second filling strip to move towards the first filling strip; the middle part of the elastic rope is arranged at the connection between two first convex strips, and the two ends of the elastic rope are respectively connected to the two side walls of the second slit of the second convex strip.

[0018] By adopting the technical scheme, the elastic rope is arranged with the first filling convex strip and the second filling convex strip; since the first filling strip is fixed in the bottom wall of the expansion joint by the sealant, the elastic rope is used to pull the second filling strip to move towards the first filling strip, so that the abutting effect between the two is improved, and the possibility that the second filling strip is pressed to arch away from the expansion joint after the expansion joint is reduced due to thermal expansion.

[0019] Preferably, the first filling strip is provided with an adjusting assembly for adjusting the height position of the middle part of the elastic rope.

[0020] By adopting the technical scheme, with long-term use, the pulling force of the elastic rope on the second filling strip will be reduced, so that the abutting effect between the first filling strip and the second filling strip is reduced; therefore, the adjusting assembly is arranged to further improve the abutting effect between the first filling strip and the second filling strip by adjusting the height position of the middle part of the elastic rope.

[0021] Preferably, the first filling strip is provided with a sliding groove below the elastic rope, the adjusting assembly comprises an abutting plate slidingly connected to the sliding groove, a sliding plate arranged below the abutting plate, a first spring arranged between the abutting plate and the sliding plate, an adjusting rod arranged above the abutting plate and used to push the abutting plate downward, and a second limiting piece limiting the sliding of the sliding plate, the sliding plate is slidingly connected to the sliding groove, and the abutting plate is connected to the middle part of the elastic rope; the lower end of the adjusting rod is fixedly connected to the second slit, and the second filling strip is pressed to drive the adjusting rod to push the abutting plate downward.

[0022] By adopting the technical scheme, the second filling strip is pressed to drive the lower end of the adjusting rod to move downward, so as to push the abutting plate to move downward and drive the first spring and the sliding plate to slide under stress, and when the sliding plate slides to a certain position, the limiting piece is used to limit the sliding of the sliding plate, so as to fix the relative height position that is adjusted, change the middle position of the elastic rope, drive the second filling strip to move towards the first filling strip, and further improve the abutting effect between the two. Since the first spring has elasticity, the elastic rope provides elastic compensation, and compared with directly changing the tightness of the elastic rope to make the elasticity of the elastic rope invalid, the elasticity of the elastic rope itself is maintained to improve the abutting effect between the first filling strip and the second filling strip.

[0023] Preferably, the second limiting piece includes a first limiting block protruding from the side wall of the sliding plate, and first guide surfaces are formed on the opposite side walls of the first limiting block, and the first guide surfaces extend to the lower surface of the first limiting block. First limiting grooves are formed on the opposite surfaces of the sliding groove for clamping the first limiting block.

[0024] By adopting the technical scheme, the second filling strip is pressed to drive the adjusting rod, the abutting plate, the first spring and the sliding plate to move downward. Due to the cooperation between the first limiting block and the first limiting groove, the middle height position of the elastic rope that needs to be changed is fixed.

[0025] Preferably, the abutting plate is provided with a through slot for slidingly arranging the adjusting rod, and the adjusting rod is arranged in the first spring to abut against the sliding plate.

[0026] By adopting the technical scheme, due to the characteristics of the slit, the width of the slit decreases in the direction away from the protrusion. It is not easy to push the abutting plate to move the sliding plate downward under the elastic force of the first spring. To this end, the abutting plate is provided with a through slot for slidingly arranging the adjusting rod and the first spring to abut against the sliding plate, and the force is directly applied to the sliding plate, so as to drive the sliding plate to move downward.

[0027] Preferably, the adjusting rod includes a sleeve fixed with the second filling strip and a sliding rod slidingly arranged in the sleeve, the lower end of the sliding rod is connected to the abutting plate or the sliding plate through the abutting plate, and the sleeve is provided with a third limiting piece for limiting the sliding of the sliding rod.

[0028] By adopting the technical scheme, the range of moving down of the lower end of the fixed-length adjusting rod is limited by directly pressing the second filling strip, and for this, the adjusting rod specifically comprises a sleeve and a sliding rod slidingly arranged in the sleeve, the lower end of the sliding rod is connected to or penetrates through the abutting plate to be connected with the sliding plate, when the abutting plate is moved to a certain height position, the telescopic structure between the sliding rod and the sleeve can give a certain sliding range, and the sliding of the sliding rod is limited by the third limiting piece, so that the length of the adjusting rod is variable.

[0029] Preferably, in the step S4, the elastic filling strip is provided with a shielding piece, the shielding piece is arranged along the full length of the elastic filling strip in the length direction, and when the sealant on both sides is not solidified, the shielding piece is inserted into the sealant on both sides.

[0030] By adopting the technical scheme, in the use process, water in the outside world can flow into the gap between the first filling strip and the second filling strip through the gap between the sealant and the elastic filling strip, so that the convex strip can be aged, and for this, the shielding piece is arranged and connected with the sealant to reduce the possibility of water penetrating into the convex strip.

[0031] In summary, the present application has the following beneficial effects:

[0032] The elastic filling strip and the sealant are used to fill and close the expansion joint, so as to reduce the penetration of water in the outside world into the soil through the expansion joint, thereby improving the protection effect on the slope. Since the concrete layer will expand and contract with temperature changes, the width of the expansion joint will become larger or smaller, and for this, the elastic filling strip comprises the first filling strip and the second filling strip, and the convex strips and the cutting joints corresponding to each other are arranged, and the both ends of the connecting rod are respectively inserted into the concrete layer and the elastic filling strip, so as to drive the elastic filling strip to deform along the width direction of the expansion joint when the concrete layer contracts, thereby improving the closed state of the expansion joint. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure schematic view of a template in embodiment 1 of the present application;

[0034] Figure 2 is a side view structure schematic view of a slope in embodiment 1 of the present application;

[0035] Figure 3 is a top view structure schematic view of a slope in embodiment 1 of the present application;

[0036] Figure 4 is a sectional structure schematic view of an elastic filling strip in embodiment 1 of the present application;

[0037] Figure 5is Figure 4 a partial enlarged view of part A in the middle;

[0038] Figure 6 is a cross-sectional structure schematic view of the adjusting assembly in embodiment 2 of the present application;

[0039] Figure 7 is Figure 6 a partial enlarged view of part B in the middle;

[0040] Figure 8 is a structure schematic view of the slide rod penetrating the abutting plate in embodiment 2 of the present application;

[0041] Figure 9 is a cross-sectional structure schematic view of the adjusting assembly in embodiment 3 of the present application;

[0042] Figure 10 is Figure 9 a partial enlarged view of part C in the middle.

[0043] BRIEF DESCRIPTION OF DRAWINGS: 1, base; 11, cushion layer; 12, formwork; 13, steel bar; 14, concrete layer; 15, connecting rod; 16, first limiting piece; 2, expansion joint; 3, elastic filler strip; 31, first filler strip; 311, insertion slot; 312, clamping slot; 313, sliding slot; 314, first limiting slot; 32, second filler strip; 33, elastic rope; 4, protruding strip; 41, first protruding strip; 42, second protruding strip; 5, cut joint; 51, first cut joint; 52, second cut joint; 6, sealing glue layer; 7, shielding piece; 8, adjusting assembly; 81, abutting plate; 811, penetrating slot; 82, sliding plate; 83, first spring; 84, adjusting rod; 841, sleeve; 842, slide rod; 843, mounting slot; 844, second limiting slot; 85, second limiting piece; 851, first guide surface; 9, third limiting piece; 91, second spring; 92, second limiting block; 921, second guide surface. DETAILED DESCRIPTION

[0044] The following will be described in detail in combination with the accompanying drawings. Figures 1-10 The present application will be further described in detail.

[0045] Embodiments of the present application disclose a roadbed slope construction process.

[0046] Embodiment 1

[0047] A roadbed slope construction process, comprising the following steps:

[0048] Step S1, construction preparation: according to the drawing and the surveying datum and measurement marks provided by the resident supervision office engineer, perform the traverse surveying, level surveying and roadbed middle stake surveying, and summarize the surveying results to submit to the resident supervision office engineer for checking.

[0049] Then start technical preparation, to obtain laboratory standard test results and the corresponding set of information. Then the site preparation, specifically: the organization of the corresponding personnel into place; remove the construction site within the scope of obstacles, leveling the working face; drainage equipment and construction machinery to the site.

[0050] Step S2, construction lofting: using total station coordinate lofting method put out the roadbed centerline and filling slope toe line, using level to measure the original elevation of each elevation control point, and make a good record, with the line centerline control, according to the slope rate calculated slope toe position according to the slope slope difference between the slope toe position point, put out the slope size.

[0051] Before the construction of the slope, the slope surface finishing and foundation construction are needed, among which the slope surface finishing, specifically, according to the design slope line to brush the slope, the roadbed slope mainly uses excavator to brush the slope, the earthwork of the widened filling on both sides of the roadbed is removed; the slope is trimmed with a slope gauge, the slope after trimming shall not be greater than the design value, and the slope toe ground is leveled, the longitudinal slope is the same as the slope toe drainage ditch longitudinal slope, attention should be paid to prevent large overbreak and underbreak during brushing, the overbreak part shall be rammed and filled densely, and the underbreak part shall be excavated to the design section, the brushing and trenching earthwork is uniformly cleaned and transported to the designated place, and shall not be randomly piled on site.

[0052] And the foundation construction, specifically, according to the measurement lofting, the foundation is excavated; after the excavation is accepted, the formwork is erected, the formwork uses shaped steel form, the bottom is embedded with 30cm steel bar for fixation, the top of the formwork is pulled against with self-made steel bar support, and the arrangement interval is 1m; after the formwork is set, the concrete is poured and vibrated, the concrete is vibrated by inserting the vibrating rod, the vibrating rod is vertically inserted into the concrete, the vibrating rod is inserted fast and pulled out slowly to avoid void; the concrete vibration time should be appropriate, when the concrete stops sinking, does not bubble, does not spew, and the surface is flat, the point is stopped, and the next point is turned to; the stability of the formwork support and the tightness of the joint should be checked during vibration to prevent leakage and running of the mold during the vibration of the concrete; the concrete surface is required to be flat and smooth without bubbles and other defects; after the initial setting of the concrete, the surface is watered and maintained, and the maintenance period is 7 days.

[0053] Step S3, slope construction: refer to Figure 1 , Figure 2 ,

[0054] S301, laying a gravel and stone cushion 11, the gravel and stone cushion 11 uses gravel or stone with a particle size of 5-40 mm, the cushion 11 is transported to the designated address by a cloth bag, and then is beaten to be flat with a shovel after the cushion 11 is transported to the designated address, the error of the gravel and stone cushion 11 does not exceed ±50 mm, the gravel and stone cushion 11 is leveled with a screed after the template 12 is installed, the gravel and stone cushion 11 is moistened with water before pouring concrete, so as to avoid the cushion 11 from absorbing slurry when the concrete is poured;

[0055] S302, setting a contraction joint 2, the construction is performed according to 5 m as a board, a 15 cm thick wooden board is used as a template 12 on both sides of the slope body, the template 12 is reinforced by using an anchoring steel bar 13 on both sides, a horizontal line is drawn at three points on the upper, middle and lower parts of the template 12 on both sides respectively to control the thickness of the concrete, and the slope concrete is poured from the bottom to the top, and is vibrated in time after being poured;

[0056] S303, the surface of the slope is covered with a water-permeable geotextile after the slope is completed, so as to avoid watering for concrete curing, and the template 12 is removed after complete solidification, so as to form a corresponding contraction joint 2, as shown in Figure 3 .

[0057] Step S4, installing an elastic filling strip 3: the concrete layers 14 on both sides of the contraction joint 2 are provided with connecting rods 15, the connecting rods 15 can be expansion bolts or chemical bolts punched into the concrete layers 14, one end of the connecting rod 15 away from the concrete layer 14 extends into the contraction joint 2, and then the pre-processed elastic filling strip 3 is installed in the contraction joint 2 along the length direction of the contraction joint 2 through sealant, the sealant is arranged on both sides of the elastic filling strip 3, and a sealant layer 6 is formed after solidification, as shown in Figure 4 .

[0058] Referring to Figure 4 , Figure 5 , the elastic filling strip 3 specifically includes two first filling strips 31 and second filling strips 32 abutting against each other and an elastic rope 33 arranged between the first filling strip 31 and the second filling strip 32, the surfaces of the first filling strip 31 and the second filling strip 32 close to each other are protruded with a plurality of protrusions 4 abutting against each other in sequence, the protrusions 4 are arranged along the length direction of the elastic filling strip 3, and the protrusions 4 are all provided with slits 5 arranged along the length direction of the protrusions 4. In the embodiment, the cross section of the protrusion 4 is V-shaped, so that the gap between the first filling strip 31 and the second filling strip 32 after abutting against each other is arranged in a zigzag shape. The slits 5 are arranged at the tips of the protrusions 4 and extend to the surfaces of the first filling strip 31 and the second filling strip 32 away from each other, respectively. The width of the slit 5 can gradually decrease in a direction away from the protrusion 4, that is, the slit 5 is V-shaped, or the cross section of the slit 5 is rectangular, which is specifically arranged according to requirements.

[0059] For the convenience of distinguishing, the convex strip 4 arranged on the first filling strip 31 is a first convex strip 41, and the convex strip 4 arranged on the second filling strip 32 is a second convex strip 42. Correspondingly, the cut seam 5 arranged on the first convex strip 41 is a first cut seam 51, and the cut seam 5 arranged on the second convex strip 42 is a second cut seam 52.

[0060] The elastic rope 33 is arranged at the middle position of the first filling strip 31 and the second filling strip 32, and is arranged at intervals along the length direction of the elastic filling strip 3. The elastic rope 33 is used to pull the second filling strip 32 to move towards the first filling strip 31. The middle part of the elastic rope 33 is arranged at the connecting position between two first convex strips 41 and is fixed with the first filling strip 31. The two ends of the elastic rope 33 are respectively connected to the two side walls of the second cut seam 52 of the upper second convex strip 42.

[0061] Further, in order to reduce the water flow between the sealant and the gap between the first filling strip 31 and the second filling strip 32 to form a gap, so as to reduce the possibility of aging at the convex strip 4. In this embodiment, the elastic filling strip 3 has a shielding piece 7. Specifically, the shielding piece 7 is arranged on the upper surface of the second filling strip 32 and is arranged in an arc shape away from the second filling strip 32. The shielding piece 7 is arranged along the full length of the elastic filling strip 3 in the length direction. The thickness of the two ends of the shielding piece 7 is relatively thick. When the sealant on both sides is not solidified, the shielding piece 7 is inserted into the sealant on both sides to be fixed with the sealant layer 6.

[0062] In this embodiment, during the installation of the elastic filling strip 3 on the expansion joint 2, the two ends of the connecting rod 15 are respectively inserted into the insertion slot 311 formed on the opposite two side walls of the first filling strip 31. The insertion slot 311 extends to the lower surface of the first filling strip 31. After installation, the sealant is filled between the elastic filling strip 3 and the two concrete layers 14, and the sealant is filled in the insertion slot 311.

[0063] Further, the end of the connecting rod 15 away from the concrete layer 14 is provided with a first limiting piece 16, which can be a limiting rod or a limiting ring perpendicular to the connecting rod 15, and is arranged according to the requirement. Correspondingly, the top wall of the insertion slot 311 is provided with a clamping groove 312 for clamping the first limiting piece 16, and the sealant is filled in the clamping groove 312.

[0064] When the concrete layer 14 expands due to temperature change, the elastic filling strip 3 is extruded, and the first and second slits 51 and 52 are formed due to the extrusion deformation under pressure. When the concrete layer 14 shrinks due to temperature change, the two ends of the connecting rod 15 are respectively inserted into the concrete layer 14 and the elastic filling strip 3, so that the elastic filling strip 3 is driven to deform along the width direction of the expansion joint 2 when the concrete layer 14 shrinks, thereby improving the sealing state of the expansion joint 2.

[0065] Embodiment 2:

[0066] With reference to Figure 6 , Figure 7 The difference from embodiment 1 is that the first filling strip 31 is provided with an adjusting assembly 8 for adjusting the height position of the middle part of the elastic rope 33. The adjusting assembly 8 specifically includes an abutting plate 81, a sliding plate 82, a first spring 83, an adjusting rod 84, and a second limiting piece 85. The first filling strip 31 is located below the elastic rope 33 and is provided with a sliding groove 313 for sliding connection of the abutting plate 81, the length direction of the sliding groove 313 is parallel to the height direction of the elastic filling strip 3, and the abutting plate 81 is fixedly connected to the middle part of the elastic rope 33. The sliding plate 82 is coaxially arranged below the abutting plate 81, the sliding plate 82 is slidingly connected to the sliding groove 313, the first spring 83 is arranged between the abutting plate 81 and the sliding plate 82, and the two ends of the first spring 83 are fixedly connected to the surfaces of the abutting plate 81 and the sliding plate 82 that are close to each other. The adjusting rod 84 is arranged above the abutting plate 81 and coaxially arranged with the abutting plate 81, the adjusting rod 84 is inserted into the second slit 52 above, and the upper end of the adjusting rod 84 is fixedly connected to the top of the second slit 52, so that the adjusting rod 84 is used to drive the abutting plate 81 to move downward when the second elastic strip is pressed.

[0067] The second limiting piece 85 is used to limit the sliding of the sliding plate 82, and in this embodiment, the second limiting piece 85 is specifically a first limiting block protruding from the side wall of the sliding plate 82, first guide surfaces 851 are formed on the opposite side walls of the first limiting block, the first guide surfaces 851 extend to the lower surface of the first limiting block, first limiting grooves 314 are formed on the opposite surfaces of the sliding groove 313 for clamping of the first limiting block, and a plurality of first limiting grooves 314 are arranged along the height direction of the sliding groove 313.

[0068] Further, due to the characteristics of the slit 5 itself, the width of the slit 5 itself decreases in the direction away from the convex strip 4, and it may not be easy to push the abutting plate 81 to push the sliding plate 82 to move downward under the elastic force of the first spring 83. For this purpose, with reference to Figure 8The abutting plate 81 can be provided with a through slot 811 along its thickness direction, in which the adjusting rod 84 is slidably arranged, and the adjusting rod 84 is slidably arranged in the first spring 83 to abut against the sliding plate 82, so as to directly apply a force on the sliding plate 82 to drive the sliding plate 82 to move downward.

[0069] Embodiment 3:

[0070] With reference to Figure 9 , Figure 10 The difference between the embodiment 2 and the embodiment 3 is that the adjusting rod 84 comprises a sleeve 841 fixed with the second filling strip 32 and a sliding rod 842 slidably arranged in the sleeve 841, the lower end of the sliding rod 842 is connected to the abutting plate 81 or is arranged through the abutting plate 81 and connected to the sliding plate 82, and the sleeve 841 is provided with a third limiting piece 9 for limiting the sliding of the sliding rod 842. In the embodiment, the inner side wall of the sleeve 841 is provided with a mounting groove 843, the third limiting piece 9 comprises a second spring 91 arranged in the mounting groove 843 and a second limiting block 92 fixedly connected with the second spring 91, the end of the second spring 91 away from the second limiting block 92 is fixedly connected to the mounting groove 843, and the outer peripheral wall of the sliding rod 842 is provided with a second limiting slot 844 in which the second limiting block 92 is slidably arranged, wherein the opposite two side walls of the second limiting block 92 are provided with second guide surfaces 921 arranged in a V shape, so that the cross section of the second limiting block 92 is arranged in a triangular shape, and the cross section of the second limiting slot 844 is arranged in a right-angled triangle shape. In the embodiment, the second limiting slot 844 is arranged in a plurality of positions along the height direction of the sliding rod 842, and the second spring 91 forces the second limiting block 92 to move towards the second limiting slot 844.

[0071] The second filling strip 32 is pressed to apply a force on the sleeve, and since the sleeve limits the sliding of the sliding rod 842 with the third limiting piece 9, the sliding rod 842 is driven to move downward at this time to press the sliding plate 82 to move downward. When the pressure applied on the second filling strip 32 is released, the sleeve is rebounded with the second filling strip 32, and the second limiting block 92 is slidably separated from the current second limiting slot 844 with the cooperation between the second limiting block 92 and the second limiting slot 844, so that the sleeve is rebounded to a certain height position with the second filling strip 32, and the second limiting block 92 is slidably arranged in the second limiting slot 844 under the action of the second spring 91.

[0072] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A roadbed slope construction technique, characterized in that: The process includes the following steps: Step S1, Construction preparation: Based on the drawings and the survey benchmark data and survey marks provided by the resident supervisory office engineer, conduct traverse surveying, leveling surveying and roadbed center and side stake surveying, and summarize the survey results; Step S2, Construction layout: Use the coordinate layout method to lay out the roadbed centerline and the filling slope toe line, and calculate the slope toe position based on the height of the set drawings; Step S3, Slope construction: Lay out the line and brush the slope, lay the subbase (11) and then level it, install the template (12) according to the size of the expansion joint (2) to be reserved, then pour concrete, and after the concrete dries and forms the concrete layer (14), dismantle the template (12); Step S4, Installing the elastic filler strip (3): Connecting rods (15) are inserted into the concrete layers (14) on both sides of the expansion joint (2). The end of the connecting rod (15) away from the concrete layer (14) extends into the expansion joint (2). Then, the pre-processed elastic filler strip (3) is installed in the expansion joint (2) along the length of the expansion joint (2) using sealant. The elastic filler strip (3) includes two abutting first filler strips (31) and second filler strips (32). The surfaces of the first filler strips (31) and the second filler strips (32) that are close to each other have several protruding ridges (4) that are alternately abutting each other. The ridges (4) are set along the entire length of the elastic filler strip (3). Each ridge (4) has a slit (5) set along the entire length of the ridge (4). During the installation of the elastic filler strip (3) into the expansion joint (2), the two ends of the connecting rod (15) are respectively inserted into the slots opened on the opposite side walls of the first filler strip (31). (311); After installation, sealant is then filled between the elastic filler strip (3) and the two concrete layers (14) on both sides, and the sealant is filled in the slot (311); the cross-section of the protrusion (4) is V-shaped, and the slit (5) is set at the tip of the protrusion (4) and extends towards the surfaces of the first filler strip (31) and the second filler strip (32) that are far apart from each other; the elastic filler strip (3) also includes an elastic rope (33) set between the first filler strip (31) and the second filler strip (32), and several elastic ropes (33) are spaced apart along the length of the elastic filler strip (3); the elastic rope (33) is used to pull the second filler strip (32) to move closer to the first filler strip (31), the middle part of the elastic rope (33) is set at the connection between the two first protrusions (41), and the two ends of the elastic rope (33) are respectively connected to the two side walls of the upper second protrusion (42) located in the second slit (52).

2. The roadbed slope construction technology according to claim 1, characterized in that: In step S4, a first limiting member (16) is provided at the end of the connecting rod (15) away from the concrete layer (14), and a slot (312) is provided on the top wall of the slot (311) for the first limiting member (16) to be inserted. The sealant is filled in the slot (312), and the slot (311) extends to the lower surface of the first filling strip (31).

3. The roadbed slope construction technology according to claim 1, characterized in that: The protrusion (4) on the first filling strip (31) is the first protrusion (41), and the protrusion (4) on the second filling strip (32) is the second protrusion (42). Correspondingly, the slit (5) on the first protrusion (41) is the first slit (51), and the slit (5) on the second protrusion (42) is the second slit (52).

4. The roadbed slope construction technology according to claim 3, characterized in that: The first filler strip (31) is provided with an adjustment component (8) for adjusting the height position of the middle part of the elastic rope (33).

5. The roadbed slope construction technology according to claim 4, characterized in that: The first filling strip (31) is provided with a groove (313) below the elastic rope (33). The adjustment component (8) includes an abutment plate (81) slidably connected to the groove (313), a slide plate (82) provided below the abutment plate (81), a first spring (83) provided between the abutment plate (81) and the slide plate (82), an adjustment rod (84) provided above the abutment plate (81) for pushing the abutment plate (81) down, and a second limiting member (85) for limiting the sliding of the slide plate (82). The slide plate (82) is slidably connected to the groove (313). The abutment plate (81) is connected to the middle of the elastic rope (33). The lower end of the adjustment rod (84) is fixedly connected to the second slit (52). Pressing the second filling strip (32) drives the adjustment rod (84) to push the abutment plate (81) down.

6. The roadbed slope construction technology according to claim 5, characterized in that: The second limiting member (85) includes a first limiting block protruding from the side wall of the slide plate (82). The opposite side walls of the first limiting block are provided with a first guide surface (851). The first guide surface (851) extends to the lower surface of the first limiting block. The opposite two surfaces of the slide groove (313) are provided with a first limiting groove (314) for the first limiting block to be engaged.

7. The roadbed slope construction technology according to claim 5, characterized in that: The abutment plate (81) has a through groove (811) through which the adjusting rod (84) slides, and the adjusting rod (84) slides through the first spring (83) to abut against the sliding plate (82).

8. The roadbed slope construction technology according to claim 5, characterized in that: The adjusting rod (84) includes a sleeve (841) fixed to the second filling strip (32) and a sliding rod (842) slidably inserted into the sleeve (841). The lower end of the sliding rod (842) is connected to the abutment plate (81) or passes through the abutment plate (81) and is connected to the sliding plate (82). A third limiting member (9) is provided on the sleeve (841) to limit the sliding of the sliding rod (842).

9. The roadbed slope construction technology according to claim 1, characterized in that: In step S4, the elastic filler strip (3) is provided with a shielding piece (7). The shielding piece (7) is provided along the entire length of the elastic filler strip (3). When the sealant on both sides has not solidified, the shielding piece (7) is inserted into the sealant on both sides.

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