Anchorage cable tensioning device

Abstract

The utility model provides a kind of anchor cable tensioning equipment, belong to tunnel construction anchor installation technical field.The anchor cable tensioning equipment, including upper anchor plate and lower anchor plate, wherein, upper anchor plate and jack body abut, lower anchor plate and the abut of construction surface backing plate, wedge, limit slot, sliding slot, bolt cooperation form angle limit and fine adjustment mechanism in anchor cable tensioning equipment, realize the adjustment between upper and lower anchor plate angle, make jack body and anchor cable axis keep coaxial, compared with traditional through-center jack fixed anchor device, the utility model is adjusted by setting radial adjusting wedge structure, when the angle deviation exists in construction surface, the relative inclination of upper and lower anchor plate can be adjusted to realize slight adjustment, realize angle compensation to make jack and anchor cable axis keep coincident, realize the effect of eliminating tensioning force component caused by angle deviation.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel construction anchor cable installation technical field, specifically, relate to a kind of anchor cable tensioning equipment. BACKGROUND

[0002] In the tunnel construction process, anchor cable tensioning is the key procedure of the formation of prestress of anchoring system. Usually, the end of anchor cable is attached to the construction surface by anchor device and backing plate, and then the jack is used to apply tension to the anchor cable. However, the tunnel lining surface often has a certain degree of unevenness or inclination deviation, so that when the anchor device is attached to the construction surface through the backing plate, the normal direction thereof is not completely consistent with the predetermined axial direction of the anchor cable.

[0003] This angle deviation causes the central axis of the jack to not accurately coincide with the central axis of the anchor cable. During actual tensioning, the thrust generated by the jack does not act along the central direction of the anchor cable, but there is an included angle component, which causes the tension to partially transform into a lateral component. Such eccentric loading not only causes fluctuations or abnormalities in the tension data, but also may cause local bias of the anchor end anchoring body, thereby causing stress concentration of the anchor device, deformation and even slippage instability of the anchor cable strands.

[0004] The construction personnel can only rely on the method of adjusting the surface layer or adjusting the gasket at the backing plate to correct the angle. This method not only consumes time and effort, but also cannot achieve accurate correction in the complex stress environment on site, resulting in insufficient tension control accuracy and shortening of the service life of the anchor cable.

[0005] Therefore, a jack structure that can adapt to the angle change of the construction surface is needed to ensure that the stress direction of the jack is consistent with the anchor cable axis, thereby ensuring the accuracy of the tension data and the safety of construction. SUMMARY

[0006] To make up for the above shortcomings, the utility model provides an anchor cable tensioning equipment, which is provided with a radially adjustable wedge block structure on the upper part. When the anchor device has an angle deviation on the construction surface, the relative inclination angle of the upper anchor plate and the lower anchor plate can be adjusted by the wedge block structure, so that the centering adjustment of the jack and the anchor cable axis can be realized.

[0007] The utility model is implemented as follows:

[0008] An anchor cable tensioning equipment includes a jack body and a backing plate arranged at the anchor device end of the jack body, and an anchor device is arranged between the jack body and the backing plate. The anchor device includes an upper anchor plate and a lower anchor plate in a disc shape. The upper anchor plate and the lower anchor plate are respectively in abutment with the jack body and the backing plate.

[0009] Three movable wedge blocks are arranged on the opposite surface of the lower anchor plate along the circumferential direction at equal intervals. An inclined surface is arranged on the opposite surface of the wedge block and abuts against the upper anchor plate.

[0010] The wedge block can move radially towards the shaft center of the lower anchor plate, and the inclined surface changes the angle between the upper anchor plate and the lower anchor plate during the movement of the wedge block.

[0011] In an embodiment of the utility model, three slide grooves are arranged on the surface of the lower anchor plate at equal intervals in the circumferential direction, a limiting groove is arranged on the bottom wall of the slide groove and communicates with the slide groove, and a blind hole is arranged on the edge of the lower anchor plate and communicates with the limiting groove.

[0012] In an embodiment of the utility model, the wedge block comprises a jacking block and a sliding block arranged at the bottom of the jacking block, the jacking block is embedded in the slide groove, the cross-sectional shapes of the jacking block and the slide groove are matched as T-shaped, the sliding block is embedded in the limiting groove and is used for limiting the movement of the jacking block in the radial direction of the lower anchor plate.

[0013] In an embodiment of the utility model, the surface of the jacking block opposite to the upper anchor plate is provided with an inclined surface extending in the radial direction, the side of the inclined surface close to the shaft center of the lower anchor plate is high, and the side far away from the shaft center of the lower anchor plate is low.

[0014] In an embodiment of the utility model, a bolt is further arranged, the bolt is arranged in the blind hole and the limiting groove and is rotatably connected with the lower anchor plate, and the sliding block is threadedly connected with the bolt.

[0015] In an embodiment of the utility model, the shaft center of the upper anchor plate and the shaft center of the lower anchor plate are respectively provided with a coaxially arranged through channel.

[0016] In an embodiment of the utility model, the slide groove and the limiting groove are independently arranged with the through channel and do not communicate with each other.

[0017] In an embodiment of the utility model, the diameter of the through channel b on the lower anchor plate is greater than the diameter of the through channel a on the upper anchor plate.

[0018] The utility model has the advantages of:

[0019] 1. The position of the wedge block is adjusted, the abutting position of the inclined surface and the upper anchor plate is changed, the angle between the upper anchor plate and the lower anchor plate is adjusted, the angle is slightly adjusted, the angle compensation is realized, the jack is coincided with the anchor cable axis, and the effect of eliminating the tension force caused by the angle deviation is realized.

[0020] 2. The anchor hole installation conditions of different sections and different angles of the tunnel can be adapted, the steps of manual leveling and gasket adjustment on site are reduced, and the construction efficiency is improved. DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0022] Figure 1 The structural schematic diagram of the anchor cable tensioning equipment provided by the embodiments of the present application is shown in the figure.

[0023] Figure 2 The structural schematic diagram of the anchor equipment provided by the embodiments of the present application is shown in the figure.

[0024] Figure 3 The structural schematic diagram of the anchor equipment provided by the embodiments of the present application is shown in the figure.

[0025] Figure 4 The structural schematic diagram of the anchor equipment provided by the embodiments of the present application is shown in the figure. Figure 3 The structural schematic diagram of the anchor equipment provided by the embodiments of the present application is shown in the figure.

[0026] In the figure: 1, jack body; 2, pad; 3, anchor equipment; 31, upper anchor plate; 311, through channel a; 33, lower anchor plate; 331, sliding groove; 332, blind hole; 333, limiting groove; 334, through channel b; 34, wedge; 341, jacking block; 352, sliding block; 35, bolt. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] As Figure 1The utility model provides a kind of anchor cable tensioning equipment, the anchor cable tensioning equipment is mainly applied to the installation stage of anchor cable in tunnel and underground engineering construction procedure, especially suitable for complex geological conditions under uneven construction surface or there is angular deviation.By setting limit groove 333 structure and slider 352 adjusting mechanism, the relative angle between upper anchor plate 31 and lower anchor plate 33 can be flexibly adjusted within a certain range by the radial movement of wedge block 34, the alignment adjustment of jack body 1 and anchor cable axis is realized, so as to ensure that tensioning direction and anchor cable stress direction remain consistent, solve the problem that existing jack is out of alignment with anchor cable axis during use due to construction surface angle, cause tensioning data to be abnormal and anchor cable to be damaged etc.

[0030] In the prior art, the jack has detachable disc-shaped anchor 3 and backing plate 2 at the end of anchor 3, the backing plate 2 is used to contact with the tunnel lining, the anchor 3 is arranged between the jack and the backing plate 2, a through channel is arranged at the axis of the anchor 3, the through channel is used for the anchor cable to pass through, the jack is used to tension the anchor cable, and the anchor 3 is used to limit the anchor cable during tensioning to prevent it from retracting after losing tension. The technical scheme mainly improves the anchor 3, and the specific improvement structure is as follows:

[0031] As shown in Figures 2-4 , the anchor 3 includes upper anchor plate 31, lower anchor plate 33, bolt 35 and wedge block 34. The through channel a311 is arranged at the axis of the upper anchor plate 31, the through channel b331 is arranged at the axis of the lower anchor plate 33, the through channel a311 is coaxial with the through channel b331, the upper anchor plate 31 is used to abut with the anchor cable end of the jack body 1, the function of the upper anchor plate 31 is consistent with that of the anchor 3 in the prior art, which is used to limit the anchor cable during tensioning to prevent it from retracting, the lower anchor plate 33 is used to be attached with the backing plate 2, the wedge block 34 is arranged between the upper anchor plate 31 and the lower anchor plate 33, and the angle between the upper anchor plate 31 and the lower anchor plate 33 is adjusted by adjusting the radial movement position of the wedge block 34.

[0032] , and the hole diameter of the through channel b331 on the lower anchor plate 33 is greater than that of the through channel a311 on the upper anchor plate 31, wherein the structure is arranged to enable the anchor cable to maintain a free sliding state in the through channel during the angle adjustment of the upper anchor plate 31 and the lower anchor plate 33, thereby avoiding the bending or local stress concentration of the anchor cable caused by the change of the angle of the two, and ensuring the stability of the tensioning process and the uniformity of the stress of the anchor cable.

[0033] As shown in Figure 3 and 4 , in order to adjust the angle between the upper anchor plate 31 and the lower anchor plate 33, the following adjusting mechanism is adopted:

[0034] Three grooves 331 are evenly spaced along the circumference on the surface of the lower anchor plate 33. A limiting groove 333 communicating with the bottom wall of each groove 331 is provided. A blind hole 332 communicating with the limiting groove 333 is provided at the edge of the lower anchor plate 33 opposite to the edge of the lower anchor plate 33. The wedge block 34 includes a lifting block 341 and a slider 352 disposed at the bottom of the lifting block 341. The lifting block 341 is embedded in the groove 331, and their cross-sectional shapes are matched to form a T-shape. The slider 352 is fitted into the limiting groove 333 to restrict the movement of the lifting block 341 along the radial direction of the lower anchor plate 33. The surface of the lifting block 341 opposite to the upper anchor plate 31 has a radially extending inclined surface. The side of this inclined surface closest to the axis of the lower anchor plate 33 is higher and farther from the axis of the lower anchor plate 33. One side of the 3-axis is lower and also includes a bolt 35. The bolt 35 passes through the blind hole 332 and the limiting groove 333 and forms a rotatable connection with the lower anchor plate 33. The slider 352 is connected to the bolt 35 by thread engagement. By rotating the bolt 35, the position of the slider 352 in the limiting groove 333 can be adjusted, thereby changing the position of the lifting block 341 in the sliding groove 331. Since the inclined surface abuts against the upper anchor plate 31, the angle between the upper anchor plate 31 and the lower anchor plate 33 is changed by the inclined surface during the movement, so as to adjust the angle between the upper anchor plate 31 and the lower anchor plate 33. It should be noted that during the adjustment process, it is necessary to adjust its position with the wedge block 34 respectively to adjust the angle between the upper anchor plate 31 and the lower anchor plate 33.

[0035] In actual construction, when the construction surface is uneven, has local protrusions or tilts that cause unevenness or angle deviation, the construction personnel can rotate the bolts 35 at the edge of the lower anchor plate 33 to make the wedge block 34 slide precisely along the limiting groove 333, thereby changing the inclination angle of the upper and lower anchor plates 33 and achieving the alignment of the central axis of the jack body 1 with the anchor cable axis.

[0036] Working principle: Install pad 2, lower anchor plate 33, upper anchor plate 31, and jack body 1 sequentially on the anchor cable. Start the jack body 1 through the hydraulic drive system. The jack body 1 pre-tensions the anchor cable to press the pad 2, lower anchor plate 33, and upper anchor plate 31 together. Check whether the jack body 1 is coaxial with the anchor cable axis. If they are not coaxial, rotate the different bolts 35 at the edge of the lower anchor plate 33 to make the different wedges 34 slide and adjust their positions along the limiting groove 333, thereby adjusting the angle between the lower anchor plate 33 and the upper anchor plate 31, and driving the jack body 1 to keep coaxial with the anchor cable axis.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An anchor cable tensioning device, characterized in that: It includes a jack body (1) and a pad (2) disposed at the end of its anchor (3), with the anchor (3) disposed between the two, characterized in that: The anchor (3) includes an upper anchor plate (31) and a lower anchor plate (33) with a disc-shaped structure. The upper anchor plate (31) and the lower anchor plate (33) abut against the jack body (1) and the pad plate (2) respectively. Three movable wedges (34) are provided at equal intervals along the circumference of the lower anchor plate (33) and the upper anchor plate (31). The wedges (34) and the upper anchor plate (31) are provided with an inclined surface, which abuts against the upper anchor plate (31). Among them, the wedge (34) can move radially toward the axis of the lower anchor plate (33). During the movement of the wedge (34), the inclined surface changes the angle between the upper anchor plate (31) and the lower anchor plate (33). With the help of the inclined surface, the upper anchor plate (31) can adjust the angle relative to the lower anchor plate (33).

2. The anchor cable tensioning device according to claim 1, characterized in that, Three grooves (331) are provided at equal intervals along the circumferential direction on the surface of the lower anchor plate (33). A limiting groove (333) communicating with the groove (331) is provided on the bottom wall of the groove (331). A blind hole (332) communicating with the limiting groove (333) is provided at the edge of the lower anchor plate (33) opposite to the limiting groove (333).

3. The anchor cable tensioning device according to claim 2, characterized in that, The wedge (34) includes a lifting block (341) and a slider (352) disposed at the bottom of the lifting block (341). The lifting block (341) is embedded in the groove (331), and the cross-sectional shapes of the two are matched to form a T shape. The slider (352) is fitted in the limiting groove (333) to restrict the lifting block (341) from moving in the radial direction along the lower anchor plate (33).

4. The anchor cable tensioning device according to claim 3, characterized in that, in, The lifting block (341) has a radially extending inclined surface on the side opposite to the upper anchor plate (31). The inclined surface is high on the side closer to the axis of the lower anchor plate (33) and low on the side farther from the axis of the lower anchor plate (33).

5. The anchor cable tensioning device according to claim 3, characterized in that, It also includes a bolt (35), which passes through the blind hole (332) and the limiting groove (333) and forms a rotatable connection with the lower anchor plate (33). The slider (352) and the bolt (35) are connected by thread.

6. The anchor cable tensioning device according to claim 3, characterized in that, The upper anchor plate (31) and the lower anchor plate (33) are respectively provided with a coaxial through-hole at the center of the axis.

7. The anchor cable tensioning device according to claim 6, characterized in that, The slide (331) and the limiting groove (333) are set independently from the through channel, and there is no connection between them.

8. The anchor cable tensioning device according to claim 6, characterized in that, The diameter of the through-hole channel b (334) on the lower anchor plate (33) is larger than the diameter of the through-hole channel a (311) on the upper anchor plate (31).

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