Steel strand tensioning device for road construction
By using the mechanical linkage between the moving base and the lifting components and the closed-loop control of the hydraulic cylinder, the problems of positioning difficulties and inaccurate measurement in existing devices have been solved, achieving precision in steel strand tensioning and reliability in measurement, thus improving construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 陕西路桥集团有限公司
- Filing Date
- 2026-03-02
- Publication Date
- 2026-04-21
AI Technical Summary
Existing steel strand tensioning devices used in road construction suffer from problems such as difficulty in positioning, cumbersome operation, poor data repeatability, and inaccurate measurement results, and are prone to failure, especially in dusty, humid, or vibrating environments.
By employing the mechanical linkage between the movable base and the lifting assembly, combined with the closed-loop control of the hydraulic ring cylinder and the ranging assembly, precise tensioning and measurement of the steel strand are achieved. Through the linkage of the gear assembly and the anchoring assembly, the stability of the steel strand during the tensioning process and the accuracy of the measurement are ensured.
It improves the positioning accuracy and construction convenience of the steel strand tensioning device, ensures uniform tensioning force and accurate measurement data, and enhances construction efficiency and measurement reliability.
Smart Images
Figure CN224149191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of road construction equipment, specifically a steel strand tensioning device for road construction. Background Technology
[0002] Prestressed steel strand tension testing is a critical step in road and bridge construction. Existing devices mostly use hydraulic or mechanical tensioning combined with sensors to measure elongation. However, due to limitations in the construction environment, problems such as positioning difficulties, cumbersome operation, and poor data repeatability often arise, affecting on-site tensioning accuracy and construction efficiency.
[0003] The existing tensioning devices rely heavily on manual alignment of the jacks, which can easily lead to deviations in height and direction. The steel strands often slip during the initial anchoring process, resulting in distorted sensor data. At the same time, some electronic measuring components are prone to failure in dusty, humid, or vibrating environments. The lack of reliable on-site calibration methods makes it difficult to ensure accurate measurement results. Utility Model Content
[0004] The purpose of this invention is to provide a steel strand tensioning device for road construction to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A steel strand tensioning device for road construction includes a movable base, the movable base including a base plate, an mounting plate fixedly installed on the top surface of the base plate, a gear assembly and a lifting assembly installed on the top surface of the mounting plate, a hollow jack fixedly installed on the top of the lifting assembly, an anchoring assembly installed at both the front and rear ends of the hollow jack, and a distance measuring assembly installed at the front end of the hollow jack.
[0007] The gear assembly includes a rotating cylinder, a protruding ring is provided at the bottom end of the outer wall of the rotating cylinder, and a driven gear is coaxially fixedly installed on the outer wall of the rotating cylinder;
[0008] The lifting assembly includes a screw and a lifting plate. The screw is threadedly connected to a rotating cylinder. An abutment plate is coaxially fixedly installed at the top end of the screw. The lifting plate is slidably installed on the outer wall of four sliding rods.
[0009] The ranging component includes a liquid storage cylinder, which is coaxially fixedly installed on the front end face of the push ring. A first piston is slidably installed on the inner wall of the liquid storage cylinder, and a spring is sandwiched between the front end face of the first piston and the inner front wall of the liquid storage cylinder.
[0010] Furthermore, sliding rods are fixedly installed at the four corners of the top surface of the mounting plate, and a limiting rotation groove is installed at the center of the top surface of the mounting plate, with the convex ring rotatably connected inside the limiting rotation groove.
[0011] Furthermore, a drive gear is rotatably connected to the top surface of the mounting plate, and a hand crank is fixedly mounted on the shaft of the drive gear. The drive gear meshes with the driven gear.
[0012] Furthermore, a rotating disk is rotatably installed at the center of the bottom surface of the lifting plate, and the bottom surface of the rotating disk is coaxially and fixedly abutted against the top surface of the abutment plate.
[0013] Furthermore, the hollow jack includes a hydraulic ring cylinder, an annular piston is slidably installed on the inner wall of the hydraulic ring cylinder, and a plurality of connecting rods are equidistantly installed on the front end face of the annular piston. The ends of the plurality of connecting rods away from the annular piston pass through the front end wall of the hydraulic ring cylinder and are fixedly connected to the push ring. A distance sensor is fixedly installed on the outer wall of the hydraulic ring cylinder.
[0014] Furthermore, the anchoring assembly includes an anchor plate, and the front end face of the anchor plate is provided with a plurality of anchoring holes at equal intervals. The anchoring holes are tapered holes that are wider at the front and narrower at the back, and anchor clamps are inserted into the plurality of anchoring holes.
[0015] Furthermore, a three-way pipe is installed on the front end face of the liquid storage cylinder, and valve assemblies are fixedly installed on both the left and right ends of the three-way pipe. Corrugated sleeves and metering tubes are fixedly installed on the two sets of valve assemblies at the ends away from the three-way pipe, respectively, and a second piston is slidably installed on the inner wall of the metering tube.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] 1. When the device of this utility model is in use, through the mechanical linkage between the mobile base and the lifting component, the operator can quickly adjust the lifting of the hollow jack by manual drive. The rotational force is converted into a stable axial thrust through the screw drive and guide limit structure, so that the hollow jack can accurately reach the tensioning operation height on the construction site, which significantly improves the positioning accuracy and construction convenience of the device.
[0018] 2. When the device of this utility model is in use, the force transmission linkage between the hydraulic ring cylinder, the pushing ring and the anchoring components is used to achieve the smooth tensioning of the steel strand under hydraulic drive. The two sets of anchoring components complete the temporary fixation and final locking of the steel strand at different stages, thereby avoiding the slippage deviation of the steel strand during the tensioning process and ensuring uniform tensioning force and accurate data measurement.
[0019] 3. When the device of this utility model is in use, the hydraulic oil is circulated between the storage tank, the bellows sleeve and the metering tube through the closed-loop hydraulic circuit design between the ranging component and the storage tank. The displacement change of the piston completes the accurate measurement and error correction of the tensioning length. After the tensioning is completed, the system can automatically reset, forming an adaptive closed-loop control of measurement, feedback and reset, which improves the reliability of measurement and reusability. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is an exploded view of the overall structure of this utility model;
[0022] Figure 3 This is a drawing of the structural parts of the movable base of this utility model;
[0023] Figure 4 This is an exploded view of the gear assembly structure of this utility model;
[0024] Figure 5 This is an exploded view of the lifting component structure of this utility model;
[0025] Figure 6 This is an exploded view of the hollow jack structure of this utility model;
[0026] Figure 7 This is an exploded view of the anchoring component structure of this utility model;
[0027] Figure 8 This is an exploded view of the ranging component structure of this utility model;
[0028] Figure 9 This is an exploded view of the valve assembly structure of this utility model.
[0029] In the picture:
[0030] 1. Movable base; 11. Base plate; 12. Supporting steel frame; 13. Mounting plate; 14. Slide rod; 15. Limiting rotation groove; 16. Extension arm; 17. Push handle;
[0031] 2. Casters;
[0032] 3. Gear assembly; 31. Rotating cylinder; 311. Convex ring; 32. Driven gear; 33. Driving gear; 34. Hand crank;
[0033] 4. Lifting assembly; 41. Screw; 411. Abutment plate; 42. Lifting plate; 421. Slide cylinder; 43. Rotary disc; 44. Surface bearing;
[0034] 5. Hollow jack; 51. Hydraulic ring cylinder; 52. Annular piston; 521. Connecting rod; 522. Push ring; 53. Distance sensor;
[0035] 6. Anchoring assembly; 61. Anchor plate; 611. Anchoring hole; 62. Anchor clamp;
[0036] 7. Distance measuring component; 71. Liquid reservoir; 711. Three-way pipe; 72. First piston; 73. Spring; 74. Valve assembly; 741. Valve body; 742. Ball valve; 743. Drive rod; 744. Rotating handle; 75. Corrugated sleeve; 76. Metering tube; 77. Second piston. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0038] Example 1: Please refer to Figures 1-5 A steel strand tensioning device for road construction includes a movable base 1, which includes a base plate 11. An mounting plate 13 is fixedly installed on the top surface of the base plate 11. Specifically, two sets of supporting steel frames 12 are symmetrically welded and fixed on the top surface of the base plate 11. The mounting plate 13 is welded and fixed to the top of the two sets of supporting steel frames 12. A vertical plate is fixedly welded to the front end of the base plate 11. A push handle 17 is fixedly installed at the top of the vertical plate. Universal wheels 2 are rotatably installed at the four corners of the bottom surface of the base plate 11. The operator moves the movable base 1 with universal wheels 2 to a designated position by pushing the handle 17. A gear assembly 3 and a lifting assembly 4 are installed on the top surface of the mounting plate 13. A hollow jack 5 is fixedly installed on the top of the lifting assembly 4. An anchoring assembly 6 is installed at both the front and rear ends of the hollow jack 5. A distance measuring assembly 7 is installed at the front end of the hollow jack 5.
[0039] Slide rods 14 are fixedly installed at the four corners of the top surface of the mounting plate 13, and a limit rotation groove 15 is installed at the center of the top surface of the mounting plate 13.
[0040] The gear assembly 3 includes a rotating cylinder 31. A convex ring 311 is provided at the bottom of the outer wall of the rotating cylinder 31. The convex ring 311 is rotatably connected inside the limiting rotating groove 15. Specifically, the inner wall of the rotating cylinder 31 is provided with an internal thread. A blocking ring is welded and fixed at the top of the limiting rotating groove 15. The limiting rotating groove 15 has a limiting and guiding function for the convex ring 311 to prevent the rotating cylinder 31 from slipping out of the limiting rotating groove 15. A driven gear 32 is coaxially fixedly installed on the outer wall of the rotating cylinder 31. A driving gear 33 is rotatably connected to the top surface of the mounting plate 13. A hand crank 34 is fixedly installed on the rotating shaft of the driving gear 33. The driving gear 33 meshes with the driven gear 32. Specifically, an extension arm 16 is welded and fixed to the top surface of the mounting plate 13. The driving gear 33 is rotatably connected to the end of the extension arm 16. The rotating shaft of the driving gear 33 passes through the extension arm 16 and is fixedly connected to the end of the hand crank 34 by bolts. The hand crank 34 drives the driving gear 33 to rotate, which indirectly drives the driven gear 32 and the rotating cylinder 31 to rotate.
[0041] The lifting assembly 4 includes a screw 41 and a lifting plate 42. The screw 41 is threadedly connected to the rotating cylinder 31. An abutment plate 411 is coaxially fixedly installed at the top of the screw 41. The lifting plate 42 is slidably installed on the outer wall of the four sliding rods 14. Specifically, a vertically penetrating sliding cylinder 421 is fixedly installed at each of the four corners of the top surface of the lifting plate 42. The four sliding cylinders 421 are slidably sleeved on the outer wall of the four sliding rods 14 respectively. A rotating disk 43 is rotatably installed at the center of the bottom surface of the lifting plate 42. The bottom surface of the rotating disk 43 is coaxially fixedly abutted against the top surface of the abutment plate 411. Specifically, a limit groove is opened at the center of the bottom surface of the lifting plate 42. The rotating disk 43 is rotatably connected in the limit groove. A plane bearing 44 is provided between the rotating disk 43 and the limit groove. The plane bearing 44 can lower... To reduce frictional loss of the rotating disk 43 and extend the service life of the device, the top surface of the abutment plate 411 is provided with several locking blocks at equal intervals, and the bottom surface of the rotating disk 43 is provided with several locking grooves at equal intervals. The locking blocks are fixedly locked inside the locking grooves. When the abutment plate 411 rotates, it can drive the rotating disk 43 to rotate synchronously. When the hand crank 34 drives the drive gear 33 to rotate, it indirectly drives the driven gear 32 and the rotating cylinder 31 to rotate. The rotating cylinder 31 is threadedly connected to the screw 41, driving the abutment plate 411 at the top of the screw 41 to push the lifting plate 42 to slide up and down on the outer wall of the slide rod 14. During this process, when the abutment plate 411 rotates, it can drive the rotating disk 43 to rotate synchronously, converting the helical vertical motion of the screw 41 into the vertical motion of the lifting plate 42.
[0042] Example 2: Please refer to Figures 2-9A steel strand tensioning device for road construction, differing from Embodiment 1, in that the hollow jack 5 includes a hydraulic ring cylinder 51. An annular piston 52 is slidably installed on the inner wall of the hydraulic ring cylinder 51. Several connecting rods 521 are equidistantly installed on the front end face of the annular piston 52. The ends of the connecting rods 521 away from the annular piston 52 pass through the front end wall of the hydraulic ring cylinder 51 and are fixedly connected to the push ring 522. A distance sensor 53 is fixedly installed on the outer wall of the hydraulic ring cylinder 51. Specifically, a first force-bearing ring is welded and fixed on the inner wall of the push ring 522, and a second force-bearing ring is welded and fixed on the inner ring wall of the hydraulic ring cylinder 51 near the rear end. One set of two anchoring components 6 is installed on the front end face of the first force-bearing ring, and the other set of anchoring components 6 is installed on the rear end face of the first force-bearing ring. The distance sensor 53 is used to provide real-time feedback of the stroke of the annular piston 52 to the control terminal.
[0043] Anchoring assembly 6 includes anchor plate 61. Anchor plate 61 has several anchoring holes 611 equidistantly spaced on its front circumference. Each anchoring hole 611 is a tapered hole wider at the front and narrower at the back. Anchor clamps 62 are inserted into each of the anchoring holes 611. Specifically, an installation ring is welded to the front end of each anchor clamp 62. The rear end of the outer wall of the anchor clamp 62 has a tapered ring wider at the front and narrower at the back. A contraction groove extending through the left and right sides is formed on the outer wall of the anchor clamp 62. Several friction rings are equidistantly spaced on the inner wall of the anchor clamp 62. The hollow jack 5 is placed at a designated position via gear assembly 3 and lifting assembly 4, and the steel strand is passed through the anchor clamp 62. At this time, the friction rings inside the anchor clamp 62 rub against the steel strand, causing the anchor clamp 62 to move forward. The tapered rings on the outer wall of the anchor clamp 62 do not contact the tapered holes inside the anchoring holes 611, and the contraction grooves of the anchor clamp 62 do not deform. This completes the sliding connection of the anchor clamps 62 to the steel strand in the two sets of anchoring assemblies 6.
[0044] The ranging component 7 includes a liquid reservoir 71, which is coaxially fixedly mounted on the front end face of the push ring 522. A first piston 72 is slidably mounted on the inner wall of the liquid reservoir 71. A spring 73 is sandwiched between the front end face of the first piston 72 and the inner front wall of the liquid reservoir 71. Specifically, the liquid reservoir 71 is fixedly mounted on the front end face of the push ring 522 by bolts. The rear end of the liquid reservoir 71 is open. The front end of the steel strand passes through two sets of anchoring components 6 and abuts against the rear end face of the first piston 72. The liquid reservoir 71 stores hydraulic oil. A three-way pipe 711 is installed on the front end face of the liquid reservoir 71. Valve components 74 are fixedly mounted on both the left and right ends of the three-way pipe 711. Specifically, the valve component 74 includes a valve body 741. A ball valve 742 is rotatably mounted inside the valve body 741. A drive rod 7 is coaxially fixedly mounted on the outer wall of the ball valve 742. 43. The end of the drive rod 743 away from the ball valve 742 passes through the valve body 741 and is fixedly installed with a rotating handle 744. The rotation of the ball valve 742 is controlled by rotating the handle 744, thereby controlling the opening and closing of the valve assembly 74. Corrugated sleeves 75 and metering tubes 76 are fixedly installed at the ports of the two valve assemblies 74 away from the three-way pipe 711, respectively. A second piston 77 is slidably installed on the inner wall of the metering tube 76. Specifically, the metering tube 76 is made of transparent acrylic tube and has a scale on its outer wall. When the hollow jack 5 initially tensions the steel strand, the steel strand may slip because the anchor clamp 62 needs a certain stroke to enter the anchor hole 611 until it locks the steel strand. This will cause the distance sensor 53 to have inaccurate data and requires manual observation through the metering tube 76.
[0045] Working principle: During use, the operator first moves the movable base 1 equipped with casters 2 by pushing the handle 17, accurately positioning the movable base 1 at the designated tensioning position of the steel strand on the construction site. After the movable base 1 is fixed, the operator drives the drive gear 33 to rotate by the hand crank 34. The drive gear 33 meshes with the driven gear 32 to drive the rotating cylinder 31 to rotate. The rotating cylinder 31 is threadedly connected to the screw 41. When the rotating cylinder 31 rotates, the screw 41 rises and falls vertically under the guidance of the limiting rotation groove 15. The abutment plate 411 at the top of the screw 41 drives the lifting plate 42 to slide up and down on the outer wall of the slide rod 14. The rotating disk 43 at the center of the bottom surface of the lifting plate 42 abuts coaxially with the abutment plate 411 through the plane bearing 44. When the abutment plate 411 rotates, it rotates synchronously, realizing the smooth transmission of the upward thrust of the rotational force, thereby completing the lifting and adjustment of the hollow jack 5, so that the hollow jack 5 can quickly and accurately reach the tensioning operation height.
[0046] When the lifting assembly 4 lifts the hollow jack 5 to the predetermined position, the annular piston 52 inside the hydraulic ring cylinder 51 slides axially under hydraulic action. The annular piston 52 drives the push ring 522 to move forward through several connecting rods 521. A distance measuring assembly 7 is fixedly installed at the front end of the push ring 522. The distance sensor 53 on the outer wall of the hydraulic ring cylinder 51 records the stroke change of the annular piston 52 in real time and feeds back the data of the tension elongation of the steel strand. A first force ring is installed at the front end of the inner wall of the push ring 522, and a second force ring is installed at the rear end of the inner wall of the hydraulic ring cylinder 51. Two sets of anchoring assemblies 6 are respectively fixed to the front end face of the first force ring and the rear end face of the second force ring, which are used to fix the steel strand during the tensioning process.
[0047] In the early stage of steel strand tensioning, the steel strand passes through the anchoring holes 611 of the two sets of anchoring components 6. At this time, the friction ring inside the anchor clamp 62 rubs against the steel strand, and the anchor clamp 62 moves forward. At this time, the conical ring on the outer wall of the anchor clamp 62 does not contact the conical hole inside the anchoring hole 611, and the contraction groove of the anchor clamp 62 is not deformed. This completes the insertion of the steel strand into the two sets of anchoring components 6. Since the anchor clamp 62 needs a certain stroke to enter the anchoring hole 611 until the steel strand is locked, the steel strand may slip at this time, which will cause the data of the distance sensor 53 to be inaccurate. Therefore, before tensioning the steel strand, a distance measuring component 7 needs to be installed on the front end of the push ring 522. The tensioning length of the steel strand is manually observed through the measuring tube 76 of the distance measuring component 7, and the error of the distance sensor 53 is detected and calibrated at the same time.
[0048] During the tensioning of the steel strand, the liquid storage cylinder 71 is first fixed to the front end of the push ring 522 with bolts. At the same time, the valve assembly 74 connected to the corrugated sleeve 75 is opened and the valve assembly 74 connected to the metering pipe 76 is closed. The excess steel strand pushes the first piston 72 forward, compressing the spring 73. The hydraulic oil inside the liquid storage cylinder 71 enters the corrugated sleeve 75 through the three-way pipe 711. The corrugated sleeve 75 stores the hydraulic oil to calibrate the position of the first piston 72. After calibration, the valve assembly 74 connected to the corrugated sleeve 75 is closed and the valve assembly 74 connected to the metering pipe 76 is opened. During the tensioning of the steel strand, the anchor clamp 62 in the anchoring assembly 6 at the front end is inserted into the anchoring hole 611 to lock the steel strand. The anchor clamp 62 in the anchoring assembly 6 at the rear end is not inserted into the anchoring hole 611, and the anchor clamp 62 has no locking effect on the steel strand. The push ring 522 drives the ranging assembly 7 to move forward synchronously.
[0049] After the steel strand is tensioned, the anchor clamp 62 in the anchoring assembly 6 at the rear end is inserted into the anchoring hole 611 to lock the steel strand. The anchor clamp 62 in the anchoring assembly 6 at the front end is not inserted into the anchoring hole 611 and has no locking effect. The hollow jack 5 is activated to drive the push ring 522 to retract to the initial position. During this process, the stretched steel strand pushes the first piston 72 in the liquid storage tank 71 forward again. The hydraulic oil inside the liquid storage tank 71 enters the metering tube 76 through the three-way pipe 711. The hydraulic oil pushes the second piston 77 inside the metering tube 76 to move. The operator observes the second piston 77 and the scale position to complete the measurement of the steel strand stretching length and can also detect the error of the distance sensor 53.
[0050] After the ranging component 7 is used, the liquid storage cylinder 71 is removed from the front end of the push ring 522. At the same time, the two valve components 74 are opened, the spring 73 releases its elastic force, and the hydraulic oil inside the bellows sleeve 75 and the metering tube 76 is drawn back into the liquid storage cylinder 71 by negative pressure, completing the reset of the first piston 72 and the second piston 77, which is convenient for the next operation. At this point, the operation of this device is completed.
[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A steel strand tensioning device for road construction, comprising a mobile base (1), characterized in that: The mobile base (1) includes a base plate (11), the top surface of which is fixedly provided with a mounting plate (13), the top surface of which is provided with a gear assembly (3) and a lifting assembly (4), the top of which is fixedly provided with a hollow jack (5), the front and rear ends of which are provided with a group of anchoring assemblies (6), and the front end of the hollow jack (5) is provided with a distance measuring assembly (7). The gear assembly (3) comprises a rotating cylinder (31), and the outer wall of the rotating cylinder (31) is coaxially and fixedly provided with a driven gear (32) at the bottom end. The lifting assembly (4) comprises a screw rod (41) and a jacking plate (42), the screw rod (41) is threadedly connected with the rotating cylinder (31), and the top end of the screw rod (41) is coaxially and fixedly provided with an abutting plate (411). The distance measuring assembly (7) comprises a liquid storage cylinder (71), the liquid storage cylinder (71) is coaxially and fixedly provided on the front end surface of the push ring (522), the first piston (72) is slidably arranged in the inner wall of the liquid storage cylinder (71), and the spring (73) is arranged between the front end surface of the first piston (72) and the inner front wall of the liquid storage cylinder (71).
2. The steel strand tensioning device for road construction according to claim 1, characterized in that: The mounting plate (13) is fixedly provided with a slide rod (14) at each corner of the top surface, a limiting rotating groove (15) is arranged at the center of the top surface of the mounting plate (13), and the convex ring (311) is rotatably connected in the limiting rotating groove (15).
3. The steel strand tensioning device for road construction according to claim 1, characterized in that: The mounting plate (13) is rotatably provided with a driving gear (33), the rotating shaft of the driving gear (33) is fixedly provided with a hand lever (34), and the driving gear (33) is engaged with the driven gear (32).
4. The steel strand tensioning device for road construction according to claim 1, characterized in that: The jacking plate (42) is rotatably provided with a rotating disc (43) at the center of the bottom surface, and the bottom surface of the rotating disc (43) is coaxially and fixedly abutted with the top surface of the abutting plate (411).
5. The steel strand tensioning device for road construction according to claim 1, characterized in that: The hollow jack (5) comprises a hydraulic ring cylinder (51), the inner wall of the hydraulic ring cylinder (51) is slidably provided with an annular piston (52), a plurality of connecting rods (521) are circumferentially and equidistantly arranged on the front end surface of the annular piston (52), the ends of the connecting rods (521) away from the annular piston (52) are fixedly connected to the push ring (522) through the front end wall of the hydraulic ring cylinder (51), and the outer wall of the hydraulic ring cylinder (51) is fixedly provided with a distance sensor (53).
6. The steel strand tensioning device for road construction according to claim 1, characterized in that: The anchoring assembly (6) comprises an anchor plate (61), a plurality of anchoring holes (611) are circumferentially and equidistantly arranged on the front end surface of the anchor plate (61), the anchoring holes (611) are tapered holes with a front width and a rear narrow, and a plurality of anchor clamping cylinders (62) are inserted into the anchoring holes (611).
7. The steel strand tensioning device for road construction according to claim 1, characterized in that: The front end face of the liquid storage cylinder (71) is provided with a three-way pipe (711), the left and right ports of the three-way pipe (711) are fixedly provided with valve assemblies (74), the ports of the two groups of valve assemblies (74) away from the three-way pipe (711) are fixedly provided with corrugated sleeves (75) and metering pipes (76) respectively, and the inner wall of the metering pipe (76) is slidably provided with a second piston (77).