CN108797582B

CN108797582B - Prestress adjusting method and anchorage device

Info

Publication number: CN108797582B
Application number: CN201810548735.6A
Authority: CN
Inventors: 郝华庚; 丛欧; 王利楠
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2018-05-31
Filing date: 2018-05-31
Publication date: 2021-05-18
Anticipated expiration: 2038-05-31
Also published as: CN108797582A

Abstract

The invention relates to a prestress adjusting method and an anchor, wherein the prestress adjusting method comprises an anchor fixing step and an anchor cable prestress adjusting step, and the anchor comprises a base and an anchor plate which are arranged in a stacked mode; the base is provided with more than two first through holes in the stacking direction of the base and the anchor plate; the anchor plate is provided with more than two second through holes and at least one third through hole in the stacking direction, the second through holes and the first through holes are arranged in a one-to-one correspondence mode, and the orthographic projection of the third through holes in the stacking direction is at least partially projected on the surface of the base, so that the ejection part can penetrate through the third through holes and abut against the base. The prestress adjusting method and the anchorage device provided by the embodiment of the invention can stretch more than two anchor cables with prestress loss at one time, and are simple to operate, time-saving and labor-saving.

Description

Prestress adjusting method and anchorage device

Technical Field

The invention relates to the technical field of anchoring, in particular to a prestress adjusting method and an anchorage device.

Background

The anchorage device is an anchoring device applied to the prestress engineering, plays an important role in the prestress engineering, and directly influences the loss of the prestress of the anchor cable and further influences the anchoring effect. The anchorage device in the prior art generally comprises an anchor plate provided with anchor holes, when the anchorage device is installed, the anchor holes on the anchor cables and the anchor plate are arranged in a one-to-one correspondence manner, the end parts of the anchor cables penetrate through the anchor holes and are fixed on the anchor plate in a stretching manner, and then the anchor plate is fixed on a reinforced object.

When the anchorage device is used, the anchor cable connected with the anchorage device can generate prestress loss. The method for adjusting the prestress of the anchor cable in the prior art has the defects that when the prestress loss of the anchor cable is too large and the anchor cable needs to be tensioned again, the corresponding adjusting method can be generally fixed again only by unloading and tensioning each anchor cable one by one, and the operation is difficult, time-consuming and labor-consuming.

Therefore, a new prestress adjustment method and anchorage are needed.

Disclosure of Invention

The embodiment of the invention provides a prestress adjusting method and an anchorage device, which can stretch more than two or even more anchor cables with prestress loss at one time, are simple to operate, and are time-saving and labor-saving.

The embodiment of the invention provides a prestress adjusting method on one hand, which comprises the following steps: fixing an anchorage device, namely fixing the anchorage device on a reinforced object through an anchor cable; the anchorage device comprises a base and an anchor plate which are arranged in a stacked mode, wherein the base is provided with more than two first through holes in the stacking direction of the base and the anchor plate, the anchor plate is provided with more than two second through holes and at least one third through hole in the stacking direction, the second through holes and the first through holes are arranged in a one-to-one correspondence mode, and the orthographic projection of the third through holes in the stacking direction is at least partially projected on the surface of the base; in the step of fixing the anchor, one end of each anchor cable penetrates through a group of first through holes and second through holes which are arranged in a one-to-one correspondence mode and is fixed on the anchor plate, so that the base is pressed against the reinforced object; and an anchor cable prestress adjusting step of causing the knockout member to pass through the third through hole and abut against the base, and changing the interval between the anchor plate and the base in the stacking direction by the knockout force of the knockout member to adjust the prestress of the anchor cable.

According to an aspect of an embodiment of the present invention, in the anchor cable prestress adjusting step, a support member is further provided, and the support member is disposed in a space between the base and the anchor plate to maintain the prestress of the anchor cable.

The prestress adjusting method comprises an anchor fixing step and an anchor cable prestress adjusting step, wherein the anchor comprises a base and an anchor plate which are arranged in a stacking mode, the base is provided with more than two first through holes in the stacking direction of the base and the anchor plate, the anchor plate is provided with more than two second through holes and at least one third through hole in the stacking direction, the second through holes and the first through holes are arranged in a one-to-one correspondence mode, when the prestress of the anchor cable needs to be adjusted, a pushing part can be provided and penetrates through the third through holes and abuts against the base, the interval between the anchor plate and the base is changed in the stacking direction through the pushing force of the pushing part, the prestress of the anchor cable is adjusted, the tensioning of more than two or even more anchor cables connected to the anchor can be completed at one time, and the operation is simple, time and labor are saved.

In another aspect, an anchor according to an embodiment of the present invention includes: the base and the anchor plate are arranged in a stacked manner; the base is provided with more than two first through holes in the stacking direction of the base and the anchor plate; the anchor plate is provided with more than two second through holes and at least one third through hole in the stacking direction, the second through holes and the first through holes are arranged in a one-to-one correspondence mode, and the orthographic projection of the third through holes in the stacking direction is at least partially projected on the surface of the base, so that the ejection part can penetrate through the third through holes and abut against the base.

According to another aspect of the embodiment of the present invention, the number of the third through holes is plural and a line of orthogonal projection on the base is a polygon.

According to another aspect of an embodiment of the present invention, the plurality of third through holes are evenly distributed on the anchor plate and are arranged around all of the second through holes.

According to another aspect of the embodiment of the present invention, further comprising a biasing member capable of functioning as a push-top member, the biasing member passing through the third through hole and abutting against the base and capable of biasing the base in the stacking direction to change the interval between the anchor plate and the base in the stacking direction.

According to another aspect of the embodiment of the present invention, the third through hole is a threaded hole, and the force application member includes a rod member in threaded engagement with the third through hole; alternatively, the third through hole is a light hole, and the force application member includes a rod member capable of extending and contracting in the stacking direction.

According to another aspect of the embodiment of the present invention, further comprising a support member that is capable of being disposed between the base and the anchor plate in the stacking direction to maintain a space between the base and the anchor plate.

According to another aspect of the embodiment of the present invention, the height of the support member in the stacking direction is adjustable.

According to another aspect of the embodiment of the present invention, the support member includes an annular structure body composed of two or more support units, and adjacent two support units are disposed one after another or at intervals in a circumferential direction of the annular structure body.

According to another aspect of the embodiment of the present invention, the height of the supporting unit in the stacking direction is adjustable.

According to another aspect of the embodiment of the invention, the supporting unit is formed by more than two layers of arc-shaped gaskets which are arranged in a stacking mode along the stacking direction; alternatively, the support unit has a telescopic cylinder structure that is telescopic in the stacking direction.

According to another aspect of the embodiment of the invention, the supporting unit is a wedge-shaped block, the wedge-shaped block comprises a bottom surface and an inclined surface in the stacking direction, one of the bottom surface and the inclined surface abuts against the base, and the other abuts against the anchor plate; or the supporting unit is a step block, the step block comprises a base surface and a step surface in the stacking direction, one of the base surface and the step surface is abutted against the base, and the other one of the base surface and the step surface is abutted against the anchor plate; or the supporting unit is a single-layer arc-shaped gasket.

According to another aspect of the embodiment of the present invention, the clip is disposed in the second through hole and extends in the stacking direction.

The anchorage device provided by the embodiment of the invention comprises a base and an anchor plate which are arranged in a stacked manner, wherein the base is provided with more than two first through holes in the stacking direction of the base and the anchor plate, the anchor plate is provided with more than two second through holes and at least one third through hole in the stacking direction, the second through holes and the first through holes are arranged in a one-to-one correspondence manner, when the anchorage device is used, one end of an anchor rope can penetrate through the first anchor holes and the second anchor holes which are arranged in a one-to-one correspondence manner and is fixed on the anchorage device, so that the anchorage device and a reinforced object are fixed, meanwhile, the base is pressed against the reinforced object, the requirement on the tensile capacity of the reinforced object can be met, and the arrangement of the third through holes enables a pushing part to be pressed against the base, so that the interval between the base and the anchor plate in the stacking direction is changed.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a concrete column to which a prestress adjusting method according to an embodiment of the present invention is applied;

FIG. 2 is a schematic view of an anchor according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the base of the structure shown in FIG. 2;

FIG. 4 is a top view of the structure shown in FIG. 2;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;

FIG. 6 is a schematic structural view of an anchor according to another embodiment of the present invention;

FIG. 7 is a schematic structural view of a support unit of one embodiment of the present invention;

FIG. 8 is a schematic structural view of a supporting unit according to another embodiment of the present invention;

FIG. 9 is a schematic structural view of a support unit according to yet another embodiment of the present invention;

FIG. 10 is a schematic view of the support unit of FIG. 9 applied to an anchorage assembly;

FIG. 11 is a schematic structural view of a supporting unit according to still another embodiment of the present invention;

FIG. 12 is a schematic top plan view of an anchor according to a further embodiment of the invention;

FIG. 13 is a top plan view of an anchor according to a further embodiment of the invention.

Wherein:

x-the stacking direction;

10-an anchorage device;

11-a base; 111-a first via;

12-an anchor plate; 121-a second via; 122-a third via;

13-a force application member;

14-a support member;

140-a support unit;

141 a-arc shim;

142 a-cylinder body; 142 b-cylinder rod;

143 a-bottom surface; 143 b-inclined plane;

144 a-a base surface; 144 b-a step surface;

20-reinforced object; 30-anchor cable; 40-a clip; 50-locking cap.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The terms of orientation used in the following description are intended to be illustrative of the orientation shown in the drawings and are not intended to limit the prestressing adjustment method and the particular construction of the anchor according to the invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The prestress adjusting method and the anchorage device provided by the embodiment of the invention can be used for different reinforced objects, so that the reinforced objects can be in a stressed state under the condition of being stressed in advance, and the prestress adjusting method and the anchorage device are particularly suitable for objects with the stressed capacity larger than the tensioned capacity. When the reinforced object is under tension, the external load firstly counteracts the pre-pressure in the reinforced object in the tension area, and then the reinforced object is tensioned along with the increase of the load, so that the tensile capacity of the reinforced object is improved, and the occurrence of tension cracks is delayed or avoided. The concrete column is taken as an example to explain the prestress adjusting method and the anchorage device in the following embodiments of the invention, but the concrete column is not limited to the concrete column, and the concrete column can also be applied to other structures, such as a concrete tower tube structure of a wind generating set in the technical field of wind power.

For better understanding of the present invention, the prestressing method and anchorage device according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 13.

Fig. 1 shows a schematic structural diagram of a concrete column to which the prestress adjusting method according to the embodiment of the present invention is applied. FIG. 2 shows a schematic structural view of an anchor according to an embodiment of the present invention, FIG. 3 shows a schematic structural view of a base of the structure shown in FIG. 2, FIG. 4 shows a plan view of the structure shown in FIG. 2, and FIG. 5 shows a cross-sectional view taken along A-A of FIG. 4.

As shown in fig. 1 to 5, an embodiment of the present invention provides a prestress adjusting method, including the following steps:

and fixing the anchor 10, namely fixing the anchor 10 on the reinforced object 20 through an anchor cable 30, wherein the anchor 10 comprises a base 11 and an anchor plate 12 which are arranged in a stacked manner, the base 11 is provided with more than two first through holes 111 in the stacking direction X of the base 11 and the anchor plate 12, the anchor plate 12 is provided with more than two second through holes 121 and at least one third through hole 122 in the stacking direction X, the second through holes 121 and the first through holes 111 are arranged in a one-to-one correspondence manner, and the orthographic projection of the third through holes 122 in the stacking direction X is at least partially projected on the surface of the base 11. In the step of fixing the anchor 10, one end of each anchor line 30 passes through a set of first and second through

holes

111 and 121, which are arranged in a one-to-one correspondence, and is fixed to the anchor plate 12, so that the base 11 is pressed against the reinforced object 20.

The anchor line 30 prestress adjusting step causes the knockout to pass through the third through hole 122 and abut against the base 11, and the interval between the anchor plate 12 and the base 11 is changed in the stacking direction X by the knockout force of the knockout to adjust the prestress of the anchor line 30.

In the step of fixing the anchor 10, the reinforced object 20 may be a concrete structure, but is not limited to the concrete structure, and in some other examples, the reinforced object 20 may also be one of a soil slope and a stone slope.

The anchor cable 30 described above and in the following embodiments of the present invention is only one of the names, and may also be referred to as a tendon, a prestressed strand, etc.

As shown in fig. 3, the base 11 may have a disk-shaped structure with a predetermined thickness, and the number of the first through holes 111 is not particularly limited, and may be set according to the number of the anchor lines 30.

The anchor plate 12 may also be a disk-shaped structure with a predetermined thickness, the stacking direction X is the thickness direction of the base 11 and/or the anchor plate 12, the number of the second through holes 121 on the anchor plate 12 is the same as the number of the first through holes 111 on the base 11, and preferably, the diameter of the first through holes 111 is larger than that of the second through holes 121, so as to facilitate the installation of the anchor cable 30, the number of the third through holes 122 may be multiple, and the top-pushing member can pass through the third through holes 122 and abut against the base 11. The orthographic projection connecting line of the plurality of third through holes 122 on the base 11 is preferably polygonal, preferably regular polygonal. If the number of the third through holes 122 is three, the orthographic projection connecting line of the three through holes on the base 11 is a triangle, preferably a regular triangle, however, in other examples, the number of the third through holes 122 may also be four, five or even more.

In one example, the radial dimension of the anchor plate 12 is smaller than the radial dimension of the base 11, so that the orthographic projection of the third through hole 122 in the stacking direction X is entirely projected on the surface of the base 11.

The anchor cable 30 can be fixed to the anchor plate 12 through the locking cap 50 shown in fig. 1, and the like, of course, the locking cap 50 is only one of the locking manners, preferably, the one end of the anchor cable 30 can also be fixed to the anchor plate 12 through the clamping pieces 40, the number of the clamping pieces 40 is preferably the same as the number of the second through holes 121 and is arranged in a one-to-one correspondence, the clamping pieces 40 are arranged in the second through holes 121 and extend along the stacking direction X, the clamping pieces 40 can be hollow conical barrel-shaped structures, when the clamping pieces 40 are installed in the corresponding second through holes 121, one end in the length direction extends into the corresponding second through holes 121, the other end abuts against the surface of the anchor plate 12 away from the base 11, the length of the clamping pieces extending into the second through holes 121 is preferably the same as the length of the second through holes 121 in the stacking direction X, the hollow cavity of the anchor cable 30 extends in the stacking direction X, the cable 30 is anchored by the frictional resistance of the clip 40 against the cable 30 to meet the fixation requirements of the cable 30.

The clamping piece 40 may be an externally fitted structural member, and of course, in order to better satisfy the size requirement of the second through hole 121 and facilitate the installation of the anchor cable 30, the clamping piece 40 may alternatively be a part of the anchor 10, and may be purchased or processed according to the size of the second through hole 121, and complete the assembly work.

In the step of fixing the anchor 10, the anchor plate 12 and the base 11 are fitted to each other with no space therebetween, or with zero space therebetween, in an initial state of the anchor 10 when the anchor is engaged with the anchor line 30 to reinforce the object 20.

When the anchor cable 30 has a loss of prestress and needs to be tensioned again, that is, in the prestress adjustment step of the anchor cable 30, a pushing-top member may be disposed in each third through hole 122, and the pushing-top members in the three through holes may simultaneously apply pushing-top force to the base 11 to adjust the interval between the anchor plate 12 and the base 11, so that the interval therebetween is increased.

Since one end of each anchor cable 30 passes through a set of first through holes 111 and second through holes 121 arranged in a one-to-one correspondence and is fixed to the anchor plate 12, the base 11 is pressed against the reinforced object 20. Therefore, when the distance between the anchor plate 12 and the base 11 increases, the anchor plate 12 moves in the stacking direction X away from the base 11, and since the three push-top members are simultaneously operable, the plurality of anchor lines 30 connected to the anchor plate 12 can be tensioned at one time to adjust the prestress of the anchor lines 30, which is simple in operation and saves time and labor. Of course, the three pushing top parts may not move simultaneously, or the pushing parts may move one by one, and the anchor plate 12 may also move in a direction away from the base 11, so that tensioning of more than two anchor cables 30 may be achieved, and the plurality of anchor cables 30 need not be tensioned one by one.

FIG. 6 shows a schematic view of anchor 10 according to another embodiment of the present invention, and the ejector member may be a male member, as long as it can pass through third through hole 122 and abut against base 11 to achieve the pre-stress adjustment of anchor line 30. Of course, as shown in fig. 6, in order to better ensure the adjusting effect of the prestress, as an alternative embodiment, a force application part 13 is further included, the force application part 13 can be used as a push top part, the force application part 13 passes through the third through hole 122 and abuts against the base 11, and can apply force to the base 11 along the stacking direction X to change the interval between the anchor plate 12 and the base 11 in the stacking direction X. I.e. without the need for an externally mounted push-top member, anchor 10 may be made to include a force application member 13, with force application member 13 acting as a push-top member to effect adjustment of the pre-stressing force of anchor line 30.

In one example, the third through hole 122 may be a threaded hole, and the force applying member 13 may include a rod member threadedly engaged with the third through hole 122, and specifically, the force applying member 13 may be a bolt or a screw, and the force applying member 13 is screwed into the corresponding third through hole 122, so that the force applying member 13 can advance toward the base 11 along the stacking direction X, and one end of the force applying member near the force applying member 13 slowly extends out of the third through hole 122, and the anchor plate 12 moves away from the base 11 along the stacking direction X. The height of the portion of the force application member 13 near the end of the base 11 that protrudes through the third through hole 122 in the stacking direction X coincides with the interval between the anchor plate 12 and the base 11, that is, the length of the anchor line 30 that is tensioned.

The third through hole 122 is a threaded hole, and the force application member 13 is a bolt or screw structure, so that the requirement that the force application member 13 is used as a top pushing member can be met, and the structure is simple and easy to operate, and after the space between the anchor plate 12 and the base 11 is adjusted to a proper position, the force application member 13 has a function of keeping the space between the anchor plate 12 and the base 11 by utilizing the self-locking performance of the thread fit due to the thread fit between the third through hole 122 and the force application member 13.

Of course, the third through hole 122 is not limited to a threaded hole, and similarly, the biasing member 13 is not limited to a bolt or a screw, and may be adjusted to adjust the distance between the base 11 and the anchor plate 12. In some alternative embodiments, the third through hole 122 may be a light hole, and the force application member 13 may include a rod capable of extending and contracting along the stacking direction X, in which case, the rod capable of extending and contracting along the stacking direction X needs to be fixedly connected with the base 11, where the fixed connection refers to the relative position determination of the two, including a non-detachable manner in which the two are fixed together by welding, and certainly including a detachable manner in which the two are connected by a fastener or the like.

When the force application member 13 includes a rod member capable of extending and retracting along the stacking direction X, the force application member 13 may be an extending cylinder, such as a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder, and the rod member is an extending rod member, and the cylinder body may be fixed to the anchor plate 12, and drives the rod member to extend, so as to apply a pressing force to the base 11, and along with the extension of the rod member, the cylinder body drives the anchor plate 12 to move along the stacking direction X in a direction away from the base 11, so as to implement the adjustment of the interval between the base 11 and the anchor plate 12, and meet the adjustment requirement of the prestress of the anchor cable 30. By adopting the mode, the force application component 13 is convenient for controlling the expansion and contraction of the rod pieces of the force application components 13 simultaneously, and the expansion and contraction amount of the rod pieces can be accurately controlled, so that the prestress of the anchor bolt is adjusted more accurately, namely the intelligent adjustment of the prestress can be realized.

No matter what form the force application component 13 is, in order to facilitate installation and control of the force application component 13, the third through holes 122 on the anchor plate 12, which are used in cooperation with the force application component 13, are preferably uniformly distributed and arranged around all the second through holes 121, so that interference of the extending part of the anchor cable 30 on the anchor plate 12 on the force application component 13 during installation of the force application component 13 can be avoided, and meanwhile, during prestress adjustment of the anchor cable 30, a larger space can be reserved for an operator, so that the force application component 13 can be conveniently driven to act, and uniformity of force application of the anchor cables 30 can be further ensured.

The interval between the anchor plate 12 and the base 11 is adjusted by using an externally-arranged ejector member or a force application member 13 of the anchor 10 itself as the ejector member, so that after the prestress of the anchor cable 30 is adjusted, the adjusted prestress of the anchor cable 30 needs to be maintained to meet the strength requirement of the reinforced object 20. Therefore, as an alternative implementation, referring to fig. 6, in the step of adjusting the prestress of the anchor cable 30 in the prestress adjusting method according to the embodiment of the present invention, the method further includes providing the supporting member 14, and disposing the supporting member 14 in the gap between the base 11 and the anchor plate 12, so as to maintain the gap between the base 11 and the anchor plate 12 constant, thereby maintaining the prestress of the anchor cable 30.

The support member 14 may be a male structural member, as long as the requirement for maintaining the pre-stress of the cable 30 is met. Of course, in order to allow the support member 14 to be shaped and sized to fit the base 11 and anchor plate 12, and to facilitate manufacture and assembly, the support member 14 is preferably part of the anchor 10.

The support member 14 may have various structural forms based on the requirement of maintaining the prestress of the anchor cable 30, and in one example, the support member 14 includes an annular structure composed of more than two support units 140, and two adjacent support units 140 are sequentially arranged along the circumferential direction of the annular structure, and the sequential arrangement means that two adjacent support units 140 abut against each other. Or two adjacent support units 140 are not spaced in the circumferential direction of the ring structure. Of course, this is one way, but not limited to this, in some other examples, two adjacent support units 140 may be disposed at intervals in the circumferential direction of the annular structure, as long as the requirement of maintaining the prestress of the anchor cable 30 can be satisfied.

Since the supporting member 14 needs to be disposed between the anchor plate 12 and the base 11, the supporting member 14 is defined in the form of a ring-shaped structure composed of two or more supporting units 140, so that the supporting member 14 is more convenient to install on the basis of satisfying the requirements.

With continued reference to fig. 6, in an example, each supporting unit 140 may be in the form of a single-layer arc-shaped gasket, and two or more arc-shaped gaskets may be formed together to form a closed annular gasket or an annular gasket with a gap to meet the use requirement of the supporting member 14, and in an implementation, the thickness of each arc-shaped gasket may be set according to the pre-stress adjustment requirement of the corresponding anchor cable 30 in the application environment thereof.

Since the prestress adjusting method and the structural form of the anchor 10 according to the embodiment of the present invention may be applied to the reinforcement of reinforced objects 20 of different types, it is necessary to cooperate with different anchor lines 30 and adjust the prestress of the anchor lines 30. Therefore, as an alternative embodiment, the height of the supporting unit 140 in the stacking direction X is preferably adjustable, so that the prestress adjusting method and the anchor 10 can be applied more widely, and different prestress maintaining requirements of different anchor cables 30 or the same anchor cable 30 can be met.

Fig. 7 shows a schematic structural diagram of the supporting unit 140 according to an embodiment of the present invention. As an alternative embodiment, the supporting component 14 may also be in the form of an annular spacer, in order to meet the requirement of height adjustability of the supporting unit 140 itself, in an example, the supporting unit 140 is preferably formed by stacking more than two layers of arc-shaped spacers 141a along the stacking direction X, the thicknesses of the more than two layers of arc-shaped spacers 141a may be the same, or of course, the thicknesses may be different, and the supporting unit 140 adopts the above structure, so that when the interval between the anchor plate 12 and the base 11 is changed, the interval between the anchor plate 12 and the base 11 can be adapted by increasing or decreasing or adjusting the arc-shaped spacers 141a of the corresponding supporting unit 140. The support member 14 having the above-described structure not only facilitates installation, but also provides a wider range of applications for the prestress adjustment method and the anchor 10 provided by the embodiments of the present invention.

Fig. 8 shows a schematic structural diagram of a supporting unit 140 according to another embodiment of the present invention, and it is understood that the supporting unit 140 that can be adjusted in height in the stacking direction X is not limited to the form shown in fig. 7, as shown in fig. 8, the supporting unit 140 may also take other structural forms, for example, the supporting unit 140 may be a telescopic cylinder structure that can be extended and retracted in the stacking direction X. Similarly, when the supporting unit 140 is in the form of a telescopic cylinder, it may be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder, and the supporting unit 140 may be disposed entirely in the space between the anchor plate 12 and the base 11, or of course, a part of the supporting unit 140 may be disposed in the space between the base 11 or the anchor plate 12, and another part may be embedded in the base 11 or the anchor plate 12. For example, a groove is provided on the base 11 or the anchor plate 12, and at least a part of the cylinder body 142a or the cylinder rod 142b of the support unit 140 can be embedded in the groove, so that the installation requirement of the telescopic cylinder can be met when the adjustable gap between the anchor plate 12 and the base 11 is too small.

It is understood that, in order to make the application range of the prestress adjusting method and the anchorage device 10 provided by the embodiment of the present invention wider, the height of the supporting unit 140 in the stacking direction X is not limited to be adjustable, and the relative positions of the supporting unit 140 and the anchor plate 12 and the base 11 may be changed.

FIG. 9 shows a schematic structural view of a support unit 140 according to still another embodiment of the present invention, and FIG. 10 shows a schematic structural view of the support unit 140 shown in FIG. 9 applied to an anchorage assembly 10.

Referring to fig. 9 and 10, in an alternative embodiment, the supporting unit 140 may be a wedge-shaped block, and the wedge-shaped block includes a bottom surface 143a and an inclined surface 143b in the stacking direction X, one of the bottom surface 143a and the inclined surface 143b abuts against the base 11, and the other abuts against the anchor plate 12. The bottom surface 143a may be a flat surface, which is not limited to an absolute flat surface, and includes a fine uneven surface due to a machining error or the like. Because the wedge-shaped block has the inclined surface 143b and is in contact with the anchor plate 12 or the base 11, when the interval between the anchor plate 12 and the base 11 in the stacking direction X is changed, the depth of the wedge-shaped block extending into the interval between the anchor plate 12 and the base 11 can be adjusted in the radial direction of the anchor plate 12 to adapt to the change of the interval, and the adjusted interval is maintained, so that the requirement for maintaining the prestress of the anchor cable 30 can be met.

In specific implementation, the inclination angle of the inclined surface 143b with respect to the bottom surface 143a may be any value between 0 ° and 30 °, including 30 °, preferably 0 ° to 20 °, and more preferably 3 °, 5 °, or 10 °. On the basis of ensuring the prestress adjusting method and the application range of the anchorage device 10, the matching of each supporting unit 140 of the supporting part 14, the anchor plate 12 and the base 11 is more stable.

Fig. 11 shows a schematic structural diagram of a supporting unit 140 according to still another embodiment of the present invention, and it is understood that the supporting unit 140 is not limited to be in the form of a wedge-shaped block, as shown in fig. 11, in an example, the supporting unit 140 may also be in the form of a step block, the step block includes a base surface 144a and a step surface 144b in the stacking direction X, one of the base surface 144a and the step surface 144b abuts against the base 11, and the other abuts against the anchor plate 12, and the base surface 144a in this embodiment is the same as the structural form of the bottom surface in the above embodiment, and thus is not repeated here. The stepped surface 144b of this embodiment may include more than two stepped surface units arranged in different levels, the number of the stepped surface units may be set according to requirements, and the height difference between two adjacent stepped surface units in the stacking direction X may be any value between 0mm and 5mm, including a 5mm end value, preferably 1mm to 4mm, more preferably 1mm, 1.5mm, 2mm, and 2.5mm, so that the prestress adjusting method and the anchor 10 of the embodiment of the present invention may have a wider application range.

When the support member 14 defined in the above embodiments is applied to the anchor 10, the number of the two or more support units 140 is not limited, and the number is preferably the same as that of the force application members 13, and when there is a space between two adjacent support units 140, the space between two adjacent support units 140 is the same.

It is understood that the prestress adjustment method and the anchor 10 of the above embodiments are described by taking the base 11 and the anchor plate 12 as the disc-shaped structure, which is an alternative, but not limited thereto, in some other embodiments, the base 11 and the anchor plate 12 may take other structural forms, such as an elliptical disc-shaped structure, a square disc-shaped structure, a polygonal disc-shaped structure or other irregular disc-shaped structures, and the shapes of the anchor plate 12 and the base 11 may be the same or different.

Referring to FIG. 12, FIG. 12 shows a schematic top view of anchor 10 according to a further embodiment of the present invention. The above embodiments limit the radial dimension of the anchor plate 12 to be smaller than the radial dimension of the base 11, which is one way, but not limited thereto. As shown in fig. 12, in some other examples, the radial dimension of the anchor plate 12 may be greater than or equal to the radial dimension of the base 11, as long as it can satisfy that the orthographic projection of the third through hole 122 in the stacking direction X is at least partially projected on the surface of the base 11, so that the push-top member can act on the base 11, and the requirement of adjusting the interval between the anchor plate 12 and the base 11 can be satisfied.

Referring to FIG. 13, FIG. 13 shows a schematic top view of an anchor assembly according to yet another embodiment of the present invention. It will be appreciated that the prestress adjustment method and anchor 10 of the above embodiments are described in the context of a plurality of third through holes 122 in anchor plate 12, but are not limited thereto. As shown in FIG. 13, the number of third through holes 122 may be one, and one third through hole 122 may be provided at a central position of anchor 10. Of course, in some other examples, the number of the third through holes 122 may also be two, and the two third through holes 122 are centrosymmetric with respect to the center line position of the anchor plate 12 as long as the requirement of adjusting the prestress of the anchor cable 30 can be satisfied.

Therefore, the prestress adjusting method and the anchor 10 provided by the embodiment of the invention can not only improve the tensile strength of the reinforced object 20, but also meet the requirement of prestress adjustment on more than two or even more anchor cables 30 at one time when the anchor cables 30 have stress loss. Because the position of the anchor cable 30, which is in contact with the locking cap 50 or the clamping piece 40, is always unchanged from the initial state until the prestress loss is readjusted, even if the prestress is readjusted, the indentation generated by the cooperation of the anchor cable 30 and the locking cap 50 or the clamping piece 40 cannot be exposed, the risk of breakage of the anchor cable 30 is reduced or eliminated, and the use specification of the anchor cable 30 is met (i.e., the anchor cable 30 with the indentation is not allowed to continue to be stressed), therefore, the anchor cable has a better application prospect.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A prestress adjusting method is characterized by comprising the following steps:

fixing the anchor (10), namely fixing the anchor (10) on a reinforced object (20) through an anchor cable (30), wherein the anchor (10) comprises a base (11) and an anchor plate (12) which are arranged in a stacked manner, the base (11) is provided with more than two first through holes (111) in the stacking direction (X) of the base (11) and the anchor plate (12), the anchor plate (12) is provided with more than two second through holes (121) and a plurality of third through holes (122) in the stacking direction (X), the second through holes (121) and the first through holes (111) are arranged in a one-to-one correspondence manner, orthographic projections of the third through holes (122) in the stacking direction (X) are at least partially projected on the surface of the base (11), orthographic projection connecting lines of the plurality of third through holes (122) on the base (11) are polygons, and the plurality of third through holes (122) are uniformly distributed on the anchor plate (12) and surround all the second through holes (121) Setting;

in the step of fixing the anchor (10), one end of each anchor cable (30) passes through a group of the first through holes (111) and the second through holes (121) which are arranged in a one-to-one correspondence manner and is fixed on the anchor plate (12), so that the base (11) is pressed against the reinforced object (20);

a cable wire (30) prestress adjustment step of causing a push top member to pass through the third through hole (122) and abut against the base (11), changing a spacing between the anchor plate (12) and the base (11) in the stacking direction (X) by a pushing force of the push top member to adjust a prestress of the cable wire (30);

in the anchor line (30) prestress adjustment step, a support member (14) is further provided, and the support member (14) is arranged in the gap between the base (11) and the anchor plate (12) to maintain the prestress of the anchor line (30), wherein the support member (14) comprises an annular structure composed of more than two support units (140), and two adjacent support units (140) are arranged one after another or at intervals in the circumferential direction of the annular structure.

2. An anchorage assembly (10), comprising:

a base (11) and an anchor plate (12) which are arranged in a stacked manner;

the base (11) has two or more first through holes (111) in the stacking direction (X) of the base (11) and the anchor plate (12);

the anchor plate (12) is provided with more than two second through holes (121) and a plurality of third through holes (122) in the stacking direction (X), the second through holes (121) are arranged in one-to-one correspondence with the first through holes (111), orthographic projections of the third through holes (122) in the stacking direction (X) are at least partially projected on the surface of the base (11) so that the pushing part can penetrate through the third through holes (122) and abut against the base (11), orthographic projection connecting lines of the third through holes (122) on the base (11) are polygons, and the third through holes (122) are uniformly distributed on the anchor plate (12) and are arranged around all the second through holes (121);

a support member (14), the support member (14) being capable of being disposed between the base (11) and the anchor plate (12) in the stacking direction (X) to maintain a spacing between the base (11) and the anchor plate (12);

the supporting component (14) comprises an annular structure body consisting of more than two supporting units (140), and two adjacent supporting units (140) are arranged in succession or at intervals along the circumferential direction of the annular structure body.

3. An anchorage assembly (10) according to claim 2, further comprising a force application member (13), the force application member (13) being capable of acting as the push-top member, the force application member (13) passing through the third through-hole (122) and abutting the base (11) and being capable of applying a force to the base (11) in the stacking direction (X) to vary the spacing of the anchor plate (12) from the base (11) in the stacking direction (X).

4. An anchorage assembly (10) according to claim 3, wherein the third through-bore (122) is a threaded bore and the force-applying member (13) comprises a rod member in threaded engagement with the third through-bore (122); alternatively, the third through hole (122) is an optical hole, and the force application member (13) includes a rod member that is capable of extending and contracting in the stacking direction (X).

5. An anchorage assembly (10) according to claim 2, wherein the support unit (140) is height adjustable in the stacking direction (X).

6. An anchorage assembly (10) according to claim 5, wherein the support unit (140) is formed from two or more layers of arcuate shims (141 a) arranged in a stack in the stacking direction (X); alternatively, the support unit (140) is a telescopic cylinder that is telescopic in the stacking direction (X).

7. An anchorage assembly (10) according to claim 2, wherein the support unit (140) is a wedge-shaped block comprising a base surface (143 a) and an inclined surface (143 b) in the stacking direction (X), one of the base surface (143 a) and the inclined surface (143 b) abutting the base (11) and the other abutting the anchor plate (12);

alternatively, the support unit (140) is a stepped block including a base surface (144 a) and a stepped surface (144 b) in the stacking direction (X), one of the base surface (144 a) and the stepped surface (144 b) abutting against the base (11) and the other abutting against the anchor plate (12);

alternatively, the supporting unit (140) is a single-layer arc-shaped gasket.

8. An anchorage assembly (10) according to any of claims 2 to 7, further comprising a clamping piece (40), the clamping piece (40) being disposed within the second through-hole (121) and extending in the stacking direction (X).