KR102435942B1 - Tension member construction device and tension member construction method of anchor system introducing tension force and chucking pressure plate of tension member construction device of anchor system to introduce tension and its manufacturing method - Google Patents

Abstract

Disclosed is an apparatus for constructing a tension member of an anchor system that introduces a tension force. The tension member construction apparatus of the anchor system for introducing the tension force of the present invention includes a plurality of tension members having one end inserted into the tension member insertion groove of the front wall of the cut excavation method surface and fixed at the end, and a plurality of tension members so that the plurality of tension members can individually penetrate. A support block provided with a tension member through-hole and capable of contacting and supporting the front wall supporting the cut excavation surface, and a plurality of chucking parts press-fitted into the plurality of tension member through-holes, respectively, capable of chucking a plurality of tension members. A construction apparatus, comprising: a tension member tension part configured to allow the plurality of tension members to pass therethrough and to be separable from the tension member, and provided to tension the plurality of tension members and maintain the tensioned state; and provided so that the plurality of tension members can penetrate between the support block and the tension member tension part, and is provided to be separable with respect to the support block and the tension member so as to press-fit and fix the plurality of chucking parts into the tension member through-hole by pressing, It is possible to directly contact the head of the chucking part, but characterized in that it comprises a press-fitting fixing part having a chucking head contact part made of a material having a relatively low hardness compared to the chucking part. According to the present invention, the chucking pressure plate has a material having a relatively low hardness compared to the chucking part and implements a part contactable with the head of the chucking part, so that the head of the plurality of chucking pieces of the chucking part is not arranged in an orderly manner. It is possible to prevent the head portion of the chucking piece from being damaged even when a tensile force is applied thereto, thereby preventing a defect in clamping the tensile member to which the chucking portion is finally tensioned.

Description

Tension member construction device and tension member construction method of an anchor system introducing tension force, chucking pressure plate of a tension member construction device of an anchor system introducing tension force, and a manufacturing method thereof chucking pressure plate of tension member construction device of anchor system to introduce tension and its manufacturing method}

The present invention is an anchor system that introduces a tension that can be fixed and installed to prevent the cut soil from collapsing at the time of digging underground or civil works in civil works or building construction sites, and to prevent damage to related parts in the process of fixing and installing the tension member. A tension member construction device, a tension member construction method, and a chucking pressure plate of a tension member construction device of an anchor system for introducing tension force, and a method for manufacturing the same.

In general, the earth anchor (earth anchor) method is widely used in order to prevent the collapse of the excavated surface at the excavation site or foundation construction site in civil engineering and construction sites.

The earth anchor method is a method of supporting the active soil by applying a tensile force to a tensile member inserted into the ground. Since a significant tensile force is applied to the tensile member, the two ends of the tensile member exposed to the outside must be firmly fixed outside the front wall.

In the case of the retaining method, there are two methods for fixing the tension member: the method of directly fixing to the wale installed horizontally on the front of the thumb pile, and the method of fixing it using the earth anchor bracket installed between the wales spaced up and down. In the case of a cut slope, there is a method of installing and fixing an acupressure plate on the front wall. Such a fixing method may be appropriately selected according to the magnitude of the tensile force applied to the tension member or the field situation.

To elaborate on this conventional construction method, since the soil on the side wall of the excavation back surface flows down to the excavation side by the pressure of the ground according to the increase in the main earth pressure during excavation civil works, the front wall is installed on the side wall to prevent the soil from collapsing. have. In this front wall, a downward sloping hole is drilled in the side wall, the inner end of the tension member is fixed inside the hole, and the outer end of the tension member is fixed to the surface of the front wall to increase the tension of the anchor against the main earth pressure generated by the loosening of the soil. By delivering it to the wall, we are responding to prevent the soil from collapsing. In this way, in order for the front wall to respond to the main earth pressure of the active soil body using the tension member, a tensioning mechanism that applies tension by pulling the tension member out of the front wall and a fixing mechanism that allows the tensioned tension member to be fixed to the front wall under tension. A tension member traction device is used.

In general, a tension member tensioning mechanism includes a retractor for clamping and pulling the tension member and a hydraulic piston/cylinder device that operates the aforementioned retractor to clamp (bite) or release the tension member, the tension member holding mechanism being disposed at the end of the tension member. It consists of a fixture 10 made of a plurality of divided pieces 11 that are separably coupled.

Such a tension member traction device brings the tension member fixing mechanism into contact with the outside of the front wall to be pulled, pulls the tension member outward using the tension member tension mechanism, receives a certain tension, and then the fixture clamps and fixes the tension member. The mechanism was separated and the tension member was cut from the outside of the fixture to fix the front wall to the side wall.

On the other hand, when the tensile force is provided by the tension member tensioning mechanism, the fixture 10 (composed of a plurality of divided pieces) of the tension member fixing mechanism is engaged with the tension member 20, and therefore moves backward by several mm by the movement of the tension member. As shown in (a), if the heads 12 of the plurality of divided pieces 11 are arranged in an orderly manner, no major problem occurs, but at least one of the plurality of divided pieces 11 protrudes as shown in FIG. 1(b). In this state, the head 12 of the protruding divided piece 11 moves toward the ground together with the tension member 20 when fixed within a predetermined space in the pressing plate 30 for the expansion of the plurality of divided pieces 11. At this time, a problem of damaging or breaking the cross-sectional area of the tension member 20 occurred. In addition, as the tension member 20 additionally moved through the separation space formed by the above-described protrusion, an instantaneous loss of tension was greatly generated.

In other words, the impact load is concentrated on the head portion of the protruding segment, so that the tension member 20 is easily damaged and the tension is lost. Here, the pressing plate 30 is provided in the tension member fixing mechanism to press the fastener 10 .

As described above, when the head 12 of the divided piece 11 is damaged, the tension member fixing mechanism is operated so that the fastener 10 made of the plurality of divided pieces 11 clamps the tension member 20 , the above-described damage , a major problem occurred in that the fastener 10 did not properly clamp the tension member 20 tensioned with the set clamping pressure due to the fracture.

In addition, the engagement operation of the fixture 10 with respect to the tension member 20 is performed manually by the operator. There are many cases in which the heads are not arranged in an orderly manner. In order to minimize the initial loss of tension in the anchor system and reduce the cross-sectional loss of the tension member 20, the present applicant proposes a tension member with a structure that can prevent damage to these components and We propose a fixing device.

Republic of Korea Patent Publication No. 10-2012-0076806 (published on July 10, 2012)

The present invention has been devised to solve the above-described problems in the prior art, and it prevents the fixing member clamping the tension member during the tension member fixing process from being damaged by contact with adjacent parts during the tension member tensioning process before the fixing process is performed. By doing so, the tension member construction device and tension member construction method of the anchor system that prevents the occurrence of defects in the tension member fixing operation and introduces a tension force that can stably fix the tension member in the tensioned state, and the tension member construction device of the anchor system that introduces the tension force. An object of the present invention is to provide a chucking pressure plate and a method for manufacturing the same.

According to one aspect of the present invention, a plurality of tension members, one end of which is inserted into the tension member insertion groove of the cut excavation surface front wall, and the ends are fixed, and a plurality of tension member through holes are provided so that the plurality of tension members can pass through individually. A construction apparatus for constructing a support block capable of contacting and supporting the front wall supporting the excavated surface, and a plurality of chucking parts press-fitted into the plurality of through-holes to respectively chuck a plurality of tension members, the plurality of a tension member tensioning part configured to allow a tension member to pass therethrough and to be separable from the tension member, the tension member tensioning part being provided to tension the plurality of tension members and maintain the tensioned state; and provided so that the plurality of tension members can penetrate between the support block and the tension member tension part, and is provided to be separable with respect to the support block and the tension member so as to press-fit and fix the plurality of chucking parts into the tension member through-hole by pressing, It is possible to directly contact the head of the chucking part, but there is provided a tension member construction apparatus for an anchor system that introduces a tension force including a press-fitting fixing part having a chucking head contact part made of a material having a relatively low hardness compared to the chucking part.

The press-fitting fixing unit may include: a chucking pressure plate provided to be in contact with the plurality of chucking units on one side of the support block; a pressure cylinder capable of press-fitting a plurality of chucking parts into the tension member through-holes by pressing the chucking pressure plate in the direction of the support block; and a hydraulic pressure supply and removal unit capable of providing hydraulic pressure to the pressure cylinder and removing the supplied hydraulic pressure.

The pressure cylinder includes: a hollow cylinder housing through which both ends are penetrated; a pressure piston coupled to the cylinder housing to be reciprocally movable along the longitudinal direction of the cylinder housing and supported in contact with one surface of the chucking pressure plate; and a cylinder cover block coupled to one side of the cylinder housing to prevent separation due to reciprocating movement of the pressure piston, wherein the cylinder housing communicates with a hydraulic chamber between the cylinder housing and the pressure piston, and provides and provides the hydraulic pressure One hydraulic path may be provided to connect with the rejection.

The cylinder cover block may be provided with an elastic restoring unit for restoring the pressure piston to an initial position by elastically pressing the pressure piston when the hydraulic pressure of the hydraulic chamber is removed.

A plurality of the elastic restoration parts are provided and are respectively inserted into a plurality of elastic restoration parts insertion grooves formed to be spaced apart from each other along the circumferential direction of the cylinder cover block, and one end thereof may be inserted so as to be elastically contacted and supported by the pressure piston.

The chucking pressure plate includes a pressure base and the chucking head contact portion, the chucking head contact portion is provided on one side of the pressure base so as to be in direct contact with the head of the chucking portion, and a plurality of the pressure base and the chucking head contact portion A plurality of through-holes may be provided so that the tension member of the .

A concave groove is provided inside the pressing base, and the chucking head contact portion may be integrally formed with the pressing base by welding metal in the concave groove.

A concave groove may be provided inside the pressing base, and the chucking head contact portion may be plastic injection-molded to be fixed to the concave groove through forced press-fitting.

According to another aspect of the present invention, a plurality of tension members having one end inserted into the tension member insertion groove of the cut excavation surface front wall and fixed at the end thereof, and a plurality of tension member through holes are provided so that the plurality of tension members can pass through individually. A construction method for constructing a support block capable of contacting and supporting the front wall supporting the excavated surface, and a plurality of chucking parts press-fitted into the plurality of through-holes to respectively chuck a plurality of tension members, (a) inserting the support blocks into a plurality of tension members so that the plurality of tension members exposed to the outside of the tension member insertion grooves respectively penetrate the plurality of tension member through holes, and then contacting and supporting the support blocks to the front wall; (b) coupling each chucking part to a plurality of externally exposed tension members so that the plurality of chucking parts are located in the vicinity of the tension member through-hole, respectively; (c) In order to press-fit the plurality of chucking parts into the through-hole of the tension member by pressing and fix it, a press-fitting part made to allow the plurality of tension members to pass through and separated from the tension member is provided on one side of the chucking part. step; (d) installing a tension member tensioning part configured to allow the plurality of tension members to pass therethrough and to be separable from the tension member on one side of the press-fitting fixing part to tension the plurality of tension members; (e) driving the tension member tensioning part to tension a plurality of tension members and maintaining the tensioned state; (f) driving the press-fitting fixing part to press-fit the plurality of chucking parts into the tension member through-holes, respectively, to chuck the plurality of tension members; and (g) sequentially removing the tension member tensioning part and the press-fitting fixing part, wherein the press-fitting fixing part includes a pressure cylinder for pressing the chucking pressure plate in the direction of the support block, and hydraulic pressure to the pressure cylinder and a hydraulic pressure supply and removal unit capable of providing and removing the supplied hydraulic pressure, wherein the step (f) includes: (f1) providing hydraulic pressure from the hydraulic pressure supply and removal unit into the pressurized cylinder and confirming the supplied hydraulic pressure; (f2) determining whether the provided hydraulic pressure in step (f1) exceeds a set reference pressure; And (f3) as a result of the determination of the step (f2), when the set reference pressure is exceeded, there is provided a tension member construction method of an anchor system introducing a tension force comprising the step of stopping the supply of hydraulic pressure to the pressure cylinder.

The press-fitting fixing part further comprises a chucking pressure plate provided to be in contact with the plurality of chucking parts on one side of the support block, wherein the chucking pressure plate is relatively compared to the chucking part on one side of the pressing base and the pressing base. and a chucking head contact portion made of a material having a low hardness, and in step (c), a plurality of tension members may be inserted through the plurality of through holes of the chucking pressure plate so that the chucking head contact portion faces the chucking portion. .

In the step (f), by adjusting the hydraulic pressure supplied into the pressure cylinder from the hydraulic pressure supply and removal unit, a plurality of chucking units are press-fitted into the tension member through-hole to control the degree of chucking the plurality of tension members. have.

According to another aspect of the present invention, one end is inserted into the tension member insertion groove of the front wall of the cut excavation method surface and a plurality of tension members are end fixed, and a plurality of tension member through holes are provided so that the plurality of tension members can pass through individually. In a construction apparatus including a support block and a plurality of chucking parts press-fitted into the plurality of tension member through-holes to respectively chuck a plurality of tension members, the plurality of chucking parts is pressed toward the support block, a pressure base; and a chucking head contact part provided on one side of the pressure base so as to be in direct contact with the head of the chucking part, and made of a material having a relatively low hardness compared to the chucking part, wherein the pressure base and the chucking head contact part have a plurality There is provided a chucking pressure plate of a tension member construction device of an anchor system that introduces a tension force in which a plurality of through-holes are provided so that the tension member of the tension member passes therethrough.

A concave groove is provided inside the pressing base, and the chucking head contact portion may be integrally formed with the pressing base by welding metal in the concave groove.

The pressure base may include an aluminum alloy steel material, and the chucking head contact portion may include a copper material.

A concave groove may be provided inside the pressing base, and the chucking head contact portion may be plastic injection-molded to be fixed to the concave groove through forced press-fitting.

According to another aspect of the present invention, one end is inserted into the tension member insertion groove of the front wall of the cut excavation method surface and a plurality of tension members are end fixed, and a plurality of tension member through holes are provided so that the plurality of tension members can pass through individually. In a construction apparatus comprising a support block and a plurality of chucking parts press-fitted into the plurality of tension member through holes to respectively chuck a plurality of tension members, the chucking pressure plate for pressing the plurality of chucking parts toward the support block is manufactured. A method, comprising the steps of: (a) forming a pressing base having a concave groove formed therein; (b) melting a metal having a relatively low hardness compared to the chucking portion during curing and filling the concave groove; (c) hardening the metal filled in the concave groove; (d) flattening the press base and the upper surface of the hardened metal to be flat; and (e) forming a plurality of through-holes in the pressure base and the hardened metal so that the plurality of tension members can pass through, respectively. do.

In the step (a), the cutting process is performed to form a pressurized base made of aluminum alloy steel, and in the step (b), the copper rod may be melted and filled.

According to another aspect of the present invention, one end is inserted into the tension member insertion groove of the front wall of the cut excavation method surface and a plurality of tension members are end fixed, and a plurality of tension member through holes are provided so that the plurality of tension members can pass through individually. In a construction apparatus comprising a support block and a plurality of chucking parts press-fitted into the plurality of tension member through holes to respectively chuck a plurality of tension members, the chucking pressure plate for pressing the plurality of chucking parts toward the support block is manufactured. A method, comprising the steps of: (a) forming a pressing base having a concave groove formed therein; (b) injection molding the chucking head contact part using a plastic material having a relatively low hardness compared to the chucking part; (c) fixing the chucking head contact portion by forcibly fitting into the concave groove; and (d) forming a plurality of through-holes in the contact portion between the pressure base and the chucking head so that the plurality of tension members can pass through, respectively. do.

According to the tension member construction apparatus and the tension member construction method of the anchor system introducing the tension force of the present invention described above and the chucking pressure plate and the manufacturing method of the tension member construction apparatus of the anchor system introducing the tension force, the chucking pressure plate is compared to the chucking part By implementing a part that can contact the head of the chucking part while having a material having a relatively low hardness, the head portion of the chucking part is damaged even when a tensile force is applied to the tension member in a state where the heads of the plurality of chucking pieces of the chucking part are not arranged in an orderly manner. Thus, it is possible to prevent the occurrence of defects in clamping the tension member in which the chucking part is finally tensioned.

In addition, by providing an elastic restoring part for elastically restoring the position of the pressure piston in the cylinder cover block, even if only one hydraulic path is formed in the cylinder housing, the pressure piston can be reciprocally moved normally, thereby simplifying the structure of the pressure cylinder, It is possible to reduce the manufacturing cost and increase the ease of assembly.

In addition, by adjusting the hydraulic pressure supplied into the pressure cylinder from the hydraulic pressure supply and removal unit, the degree of chucking the plurality of tension members by being press-fitted into the tension member through-holes can be variably controlled.

1 is a view showing the problems of the prior art;
2 and 3 are views showing a state in which a tension member construction device of an anchor system for introducing a tension force according to an embodiment of the present invention is installed;
4 to 6 are views sequentially showing the process of fixing the tension member by pressing the chucking part while the tension member construction device of the anchor system introducing the tension force according to an embodiment of the present invention pulls the tension member and maintains the tensioned state;
7 is an enlarged view of region VI of FIG. 6;
8 is an exploded perspective view showing a chucking unit of a tension member construction apparatus of an anchor system for introducing a tension force according to an embodiment of the present invention;
9 and 10 are views showing the disassembled state of the support block, the chucking part and the pressure cylinder in the tension member construction apparatus of the anchor system for introducing the tension force according to the embodiment of the present invention;
11 is a perspective view showing an example of a chucking pressure plate in a tension member construction apparatus of an anchor system for introducing a tension force according to an embodiment of the present invention;
12 is a cross-sectional view taken along line XI-XI of FIG. 11;
13 is a perspective view showing another example of FIG. 11;
14 is a cross-sectional view taken along line XIIⅠ-XIIⅠⅠ of FIG. 13;
15 is a view showing the manufacturing process of the chucking pressure plate in the tension member construction apparatus of the anchor system for introducing the tension force according to an embodiment of the present invention;
16 is a view showing the manufacturing process of another chucking pressure plate in the tension member construction apparatus of the anchor system for introducing the tension force according to the embodiment of the present invention;
17 is a flowchart showing a tension member construction method of an anchor system for introducing a tension force according to an embodiment of the present invention;
18 to 23 are views sequentially illustrating a method of constructing a tension member of an anchor system for introducing a tension force according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments allow the disclosure of the present invention to be complete, and the scope of the invention to those of ordinary skill in the art completely It is provided to inform you. In the drawings, like reference numerals refer to like elements.

The tension member construction apparatus and construction method of an anchor system introducing tension force according to a preferred embodiment of the present invention is anchoring using a plurality of tension members so that the cut soil does not collapse during underground excavation or slope cutting work at civil engineering or building construction sites. Additional loss of anchor tension is reduced by preventing damage to related parts (hereinafter referred to as the chucking part) that chuck or clamp the tension member so that the tension member can stably support the front wall installed on the excavation surface for a long period of time. It is possible to prevent the collapse of the construction site and the occurrence of safety accidents in advance by securing the stability of the tension member.

Hereinafter, the present invention will be described in detail with reference to Examples.

2 and 3, the tension member construction device (hereinafter, the construction device) of the anchor system for introducing the tension force according to the embodiment of the present invention has one end into the tension member insertion groove 100 inside the cut excavation surface. A plurality of tension members 101 inserted and fixed at the ends, and a plurality of tension member through holes 210 are provided so that the plurality of tension members 101 can pass through individually, and a support capable of contacting and supporting the front wall supporting the cut excavation surface. It is an apparatus for constructing a block 200 and a plurality of chucking parts 300 that are respectively press-fitted into the plurality of tension member through-holes 210 to chuck the plurality of tension members. That is, as will be described in detail below, the plurality of tension members 101 are in a tensioned state in the tension member insertion groove 100 or more, and the support block 200 and the chucking unit 300 are in tension of these tension members. It is possible to prevent the collapse of the excavation surface through the front wall, the tension member 101, the support block 200 and the chucking part 300 by maintaining it stably.

Here, the front wall includes a retaining wall block provided on the cut slope, a wale (H) applied to the retaining method, an earth wall support bracket (not shown), and the like, and the retaining wall block is approximately rectangular/cube shape, cross shape ( cross block), etc., the case installed in the retaining wall block is shown in FIG. 2, and the case installed in the wale (H) is shown in FIG.

And, the 'excavation slope' to be described below includes a cut slope on which a retaining wall block is installed, and an earthen wall formed through retaining construction at a construction site.

Hereinafter, the installation state of the configuration will be briefly described prior to a detailed description of the main configuration. After being inserted, a grouting (cement grouting) material is injected into the tension member insertion groove 100 and the hardening operation is completed to firmly fix the insertion end of the tension member 101 to the excavation surface. Here, the tension member 101 may be formed in a form in which a plurality of steel wires having a predetermined thickness are twisted together to form an integral body.

On the other hand, as shown in Figure 3, in the retaining method in order to support the cut excavation surface, a vertical wale and a horizontal wale (H) are installed, and the support block 200 is in contact with and supported by the horizontal wale (H). Although not limited thereto, the support block 200 may be installed to be supported in contact with and supported by a separate earth wall support bracket (not shown) connecting a plurality of horizontal bands spaced up and down depending on the situation of the work site, and It may be installed so as to be supported in contact with the front wall (retaining wall block in FIG. 2). Hereinafter, for the convenience of explanation and illustration, the former (installed on a horizontal wale) will be described as a reference and will be shown in the related drawings after FIG. 4, but in addition to the front wall (retaining wall block in FIG. It is of course also possible to be installed so as to be supported in contact.

4 to 6, in the construction apparatus according to the embodiment of the present invention, a tension member tension part 400 and a plurality of chucking parts 300 for tensioning a plurality of tension members 101 and maintaining the tensioned state. and a press-fitting fixing part 600 for press-fitting and fixing the tension member through-hole 210 inside by pressing. Although the related drawings show a structure in which four tension members are provided, the number can be increased or decreased.

First, the structure and operation process of the tension member tension part 400 for tensioning the tension member 101 will be described.

As shown in FIGS. 4 to 6 , the tension member tensioning part 400 includes a kind of cylinder structure provided so that a plurality of tension members 101 can pass therethrough and can be separated from the tension member 101 . The tension member tension part 400 is installed on one side of the press-fit fixing part 600 .

The tension member tensioning part 400 is fixed to one side of the press-fitting fixing part 600, and the tensioning head 420 is fixed to the tension piston 410 movably installed in the housing of the tension member tensioning part 400, The tensioning chucking part 440 clamping the tensioning member 101 is inserted into the tapered through-hole 430 formed in the tensioning head 420 to fix the position.

In this way, in a state in which the support block 200 and the tension member tension part 400 are fixed in position on the wale, when hydraulic pressure is supplied into the first hydraulic chamber 460 through the first hydraulic port 450, the tension piston 410 . It moves in a direction away from the support block 200 .

Accordingly, since the tensile piston 410 moves the tensile head 420 in the same direction as well, the tensile chucking part ( As the 440 moves in the same direction, the tension member 101 clamped to the tension chuck 440 is tensioned by about several mm. In addition, as the hydraulic pressure supply state is maintained, the plurality of tension members 101 may be maintained in a tensioned state. A through hole is formed in the tension piston 410 so that the plurality of tension members 101 individually pass therethrough.

In the present invention, in the state in which the tension member 101 is tensioned in this way, the chucking part 300 to be described later is pressed to forcibly press into the tension member through hole 210 of the support block 200, so that the tension member 101 is stable. It is possible to maintain the installed state to prevent the collapse of the excavation surface while maintaining the tensioned state.

On the other hand, in the process of tensioning the tension member 101 in this way, as will be described later, a plurality of chucking parts 300 (pressing chucking parts) inserted into the tension member through-hole 210 of the support block 200, especially the chucking part The head 320 of 300 may cause damage to the end of the head 320 as mentioned in the prior art.

In other words, the chucking part 440 for tension and the chucking part 300 for maintaining the tension of the tension member have the same shape and structure, for example, as shown in FIGS. 4 to 8, three chucks The king piece 310 is configured to be spaced apart along the circumferential direction so as to surround the tension member 101 in the circumferential direction, and has a wedge shape as a whole. The head 320 side portion of the three chucking pieces 310 maintains a state coupled to each other through an elastic member such as a rubber ring, and the opposite side portion is formed in a form that can be freely spread outward. The tension member through hole 210 of the support block 200 also has a tapered inner surface so that the wedge-shaped chucking part 300 is press-fitted and fixed.

As shown in FIG. 8 , a plurality of contact grooves 330 are formed on the inner surface of the chucking piece 310 contactable with the tension member 101 to increase contact friction with the tension member, and accordingly, the chucking part 300 . When is press-fitted into the tension member through hole 210 of the support block 200, it sufficiently contacts the outer surface of the tension member 101 to stably maintain the clamped state, that is, the tension member 101 is in a tensioned state. do.

On the other hand, when the tension member 101 is tensioned as described above, the heads 320 of the three chucking pieces 310 partially inserted into the tension member through-holes 210 of the support block 200 according to the prior art. As shown in the related drawings, if they are arranged in an orderly state, damage to the head 320 may not occur. However, as shown in Fig. 1(b), if the three chucking pieces are not arranged in an orderly manner and at least one is arranged at a misaligned position, the head of the misaligned chucking piece 310 when a tensile force is applied to the tension member 101 ( During the process of fixing one surface of the chucking pressure plate 610 , the tension member 20 may be easily damaged, additional tension loss, etc. may occur due to the concentration of stress on the head 320 region.

Although the present invention will be described below, by applying a novel shape and structure to the chucking pressure plate 610, even when such a situation occurs, damage to the head 320 of the chucking piece 310 is prevented, thereby increasing the durability of the entire device. can Details related to this will be described later.

Next, as shown in FIGS. 4 to 7 , the press-fit fixing part 600 presses the plurality of chucking parts 300 to press-fit the tension member through-hole 210 inside the support block 200 and the tension member tension part. As provided between the 400 , the plurality of tension members 101 are provided so as to be penetrated and are separable with respect to the support block 200 and the tension member 101 . That is, the tension member tensioning part 400 and the press-fitting fixing part 600 may be installed so that the plurality of tension members 101 are freely inserted therethrough, and can be easily separated from the tension member 101 and can be separated from each other. is done

4 to 7 , the press-fitting fixing unit 600 includes a chucking pressure plate 610 , a pressure cylinder 630 , and a hydraulic pressure supply and removal unit 640 .

The chucking pressure plate 610 is provided to be in contact with the plurality of chucking parts 300 on one side of the support block 200 . Here, the chucking part 300 is inserted into the tension member through hole 210 of the support block 200 to maintain the tension member 101 in a tensioned state.

The pressure cylinder 630 presses the chucking pressure plate 610 in the direction of the support block 200 to press-fit and fix the plurality of chucking parts 300 into the tension member through-hole 210 .

The hydraulic pressure supply and removal unit 640 provides hydraulic pressure to the pressure cylinder 630 and removes the supplied hydraulic pressure, for example, it is applicable to a hand pump that can be operated manually by a worker, and this hydraulic pressure supply and removal unit A separate valve (not shown) is provided at 640 , which is closed when the hydraulic pressure is provided to the pressurizing cylinder 630 so that the hydraulic pressure is provided to the pressurized cylinder and opened when the hydraulic pressure in the pressurized cylinder is removed. In addition, the hydraulic pressure supply and removal unit 640 is provided with a fluid recovery path for recovering the working fluid in the pressure cylinder 630 at the 'when the hydraulic pressure is removed'. However, the present invention is not limited thereto, and the hydraulic pressure supply and removal unit 640 may have a structure capable of automatically providing and removing hydraulic pressure.

As shown in FIG. 7 , the pressure cylinder 630 is coupled to the cylinder housing 631 so as to be reciprocally movable in the longitudinal direction of the cylinder housing 631 having a hollow shape through which both ends are penetrated and the cylinder housing 631 is chucked. It includes a pressure piston 632 supported in contact with one surface of the pressure plate 610, and a cylinder cover block 633 coupled to one side of the cylinder housing 631 to prevent separation due to the reciprocating movement of the pressure piston 632. .

One hydraulic chamber 634 is formed between the cylinder housing 631 and the pressure piston 632 , and the cylinder housing 631 communicates with one hydraulic chamber 634 and is connected to the hydraulic pressure supply and removal unit 640 . One hydraulic path 635 is provided. The pressure piston 632 has a hollow shape with both ends open so that the plurality of tension members 101 pass therethrough. In addition, a leak prevention ring 636 made of a rubber material is provided at a contact portion between the cylinder housing 631 and the pressure piston 632 to prevent leakage of the working fluid supplied to the hydraulic chamber 634 . In addition, a separate stopper protrusion 637 is provided in the cylinder housing 631 to limit the movement distance when the pressure piston 632 moves in the opposite direction to the support block 200 .

In the embodiment of the present invention, the chucking pressure plate 610 is provided in a state supported in contact with one end of the pressure piston 632 , and the hydraulic pressure chamber 634 of the cylinder housing 631 from the hydraulic pressure supply and removal unit 640 . When this hydraulic pressure is supplied, the pressure piston 632 moves the chucking pressure plate 610 in the direction of the support block 200, and accordingly, the chucking pressure plate 610 moves the plurality of chucking parts 300 through the tension member through-hole of the support block. (210) can be forcibly pressed inward.

On the other hand, as described later, the tension of the tension member -> maintenance of the tension member through forced press-fitting of the chucking part -> removal of the tension member tension part -> removal of the press-fitting part is sequentially performed, and the press-fitting part 600 is another For the same repetitive operation of the tension member 101 , the pressure piston 632 needs to be restored to its initial position in the cylinder housing 631 .

In the present invention, as shown in FIG. 7 , there is only one hydraulic chamber 634 in the cylinder housing 631 , and the reciprocating movement of the pressure piston 632 can be easily implemented only through supply and removal of the working fluid. none.

That is, in order to restore the position of the pressure piston 632 to the initial state when the working fluid in the hydraulic chamber 634 moves to the outside through the hydraulic path 635, FIGS. As shown, the cylinder cover block 633 is provided with an elastic restoring part 638 for restoring the initial position by elastically pressing the pressure piston 632 when the hydraulic pressure of the hydraulic chamber 634 is removed.

A plurality of elastic restoration part insertion grooves 639 are formed in the cylinder cover block 633 to be spaced apart from each other along the circumferential direction, and a plurality of elastic restoration parts 638 are provided in the plurality of elastic restoration part insertion grooves 639. each inserted. The elastic recovery part 638 can be applied as an example of a coil spring, and one end thereof is elastically supported in contact with the pressure piston 632 , and the other end is provided to be in contact with and supported by the bottom surface of the elastic recovery part insertion groove 639 . do. Accordingly, when the hydraulic pressure in the hydraulic chamber 634 is removed, the elastic restoring unit 638 may press the pressure piston 632 to restore the position to the initial state. Here, the cylinder cover block 633 is screw-coupled to the cylinder housing 631 to be detachable.

That is, in the present invention, only one hydraulic path 635 is formed in the cylinder housing 631 by providing an elastic restoring part 638 for elastically restoring the position of the pressure piston 632 to the cylinder cover block 633 . And as the hydraulic pressure is supplied and removed through one hydraulic path, the pressure piston 632 can be reciprocally moved normally, thereby simplifying the structure of the pressure cylinder and reducing manufacturing cost and increasing ease of assembly. can

Next, the chucking pressure plate 610 is made in a substantially circular plate shape, and the head 320 and the pressure piston 632 can be in contact between the head 320 and the pressure piston 632 of the chucking unit 300 . It is interposed so as to move at the same time as the pressure piston moves to force the chucking part 300 into the tension member through-hole 210 of the support block 200 .

On the other hand, in order to prevent damage to the head 320 region by tensioning the tension member 101 in a state in which the plurality of chucking pieces 310 are not arranged neatly as described above, the chucking pressure plate 610 is additionally structure is employed.

Specifically, as shown in FIGS. 11 to 14 , the chucking pressure plate 610 is a pressure base 611 and a pressure base 611 to be in direct contact with the head 320 of the chucking unit 300 . It includes chucking head contact portions 621 and 622 provided on one side. Here, the chucking head contact parts 621 and 622 are, as described above, to prevent the head 320 of the chucking piece 310 from being damaged while striking the chucking pressure plate 610 by the tensioning operation of the tension member, the chucking part 300 It is made of a material having a relatively low hardness compared to In addition, a plurality of through holes 623 are provided in the pressure base 611 and the chucking head contact portions 621 and 622 so that the plurality of tension members 101 pass therethrough.

In an embodiment of the present invention, the chucking head contact portions 621 and 622 may be implemented as in the following two embodiments, but are not limited thereto, and may be provided entirely on one surface of the pressing base 611 . Hereinafter, two specific examples will be described.

In the first embodiment, as shown in FIG. 15, a concave groove 612 is provided on the inside of the pressing base 611, and the chucking head contact part 621 is welded with a metal in the concave groove 612 to the pressing base ( 611) and may be integrally formed.

In the present invention, the chucking unit 300, that is, each chucking piece 310 is made of SNCM 415 and SNCM 420 series materials, and the pressure base 611 may include an aluminum alloy steel material. In addition, the chucking head contact portion 621 may include or be made of a copper material having a relatively lower hardness than SNCM 415 and SNCM 420 series materials.

Hereinafter, a method of manufacturing the chucking pressure plate 610 will be described with reference to FIG. 15 .

First, a press base 611 having a concave groove 612 formed therein is molded. Specifically, a concave groove 612 is formed on the inside by cutting a pressing base block (not shown) including an aluminum alloy steel material.

Next, the metal is melted and filled in the concave groove 612 . Specifically, the copper rod 624 is filled by melting, and the copper has a relatively low hardness compared to the chucking part 300 when cured.

Next, the molten metal filled in the concave groove 612, that is, copper is hardened.

On the other hand, since the upper surface of the hardened metal may not be flat, a planarization operation is performed so that the pressing base 611 and the hardened metal, that is, the upper surface of the chucking head contact part 621 are flat. Here, the planarization operation may use a separate polishing apparatus, grinder, or the like.

Finally, a plurality of through holes 623 are formed in the pressure base 611 and the hardened metal, that is, the chucking head contact portion 621 so that the plurality of tension members 101 can pass through, respectively.

Here, the concave groove 612 may be formed over the entire inner region (including the central region) of the pressing base 611 as shown in FIG. It may be formed only on the remaining portions except for the central cylindrical portion 625 of the pressing base 611 . In this case, since copper has a relatively low hardness compared to the pressure base 611 , the decrease in the rigidity of the entire chucking pressure plate 610 can be compensated by reducing the area of the region in which copper is provided compared to the former case.

As a second embodiment, as shown in FIG. 16 , a concave groove 612 is provided on the inside of the pressure base 611 , and the chucking head contact portion 622 is plastic injection-molded to force press-fit into the concave groove 612 . fixed through

In the present invention, the chucking unit 300, that is, each chucking piece 310 is made of SNCM 415 and SNCM 420 series materials, and the pressure base 611 may include an aluminum alloy steel material. In addition, the chucking head contact part 622 may be made of a material such as ABS, POM, PS, PE, etc. having a relatively lower hardness than SNCM 415 and SNCM 420 series materials.

Hereinafter, a method of manufacturing the chucking pressure plate 610 will be described with reference to FIG. 16 .

First, a press base 611 having a concave groove 612 formed therein is molded. Specifically, a concave groove 612 is formed on the inside by cutting a pressing base block (not shown) including an aluminum alloy steel material.

Next, a separate chucking head contact portion 622 is injection-molded using a plastic material.

Here, the resin for injection molding the chucking head contact part 622 is applicable to ABS, POM, PS, PE, etc., which have a relatively low hardness compared to the chucking part 300 when cured after melting.

Next, the chucking head contact portion 622 is press-fitted into the concave groove 612 to be fixedly coupled. For such forced press-in, a separate press-in device such as a press machine may be used.

Finally, a plurality of through-holes 623 are formed in the pressure base 611 and the chucking head contact portion 622 so that the plurality of tension members 101 can pass through, respectively.

Here, the concave groove 612 may be formed over the entire inner region (including the central region) of the pressing base 611 as shown in FIG. 16 , but otherwise, as shown in FIGS. 13 and 14 , It may be formed only on the remaining portions except for the central cylindrical portion 625 of the pressing base 611 . In this case, since the plastic material has a relatively low hardness compared to the pressing base 611, the reduction in the rigidity of the entire chucking pressing plate 610 can be compensated by reducing the area of the region in which the plastic material is provided compared to the former case.

Hereinafter, a tension member construction method of an anchor system introducing a tension force according to an embodiment of the present invention will be described with reference to FIGS. 17 to 23 .

First, the tension member 101 to which the anchor body 102 is coupled to the end is prepared.

Next, a drilling operation of the tension member insertion groove 100 for insertion of the tension member 101 into the cut excavation surface is performed.

Thereafter, the grouting (cement grouting) material is injected into the tension member insertion groove 100 and the hardening operation is completed to firmly fix the anchorage located at the tip of the tension member 101 to the solid anchoring ground.

Next, in order to resist the main earth pressure of the active soil, the front wall (retaining wall block, wale, soil wall support bracket) of the anchor to which the traction force of the tensile member is transmitted when the tensile force is introduced is installed. In the case of the retaining method, a vertical wale (H) and a horizontal wale (H) are installed to support the load of the cut earth wall, and a separate earth wall support bracket (not shown) is installed on the horizontal wale (H) depending on the work site.

Thereafter, an operation of substantially stretching the tension member 101 over a certain period and maintaining the tension member in a tensioned state is performed, which will be described with reference to FIG. 16 .

First, as shown in FIGS. 17 and 18 , the plurality of tension members 101 exposed to the outside of the tension member insertion groove 100 are supported by the plurality of tension members 101 so as to penetrate the plurality of tension member through holes 210 , respectively. After inserting the block 200, the support block 200 is supported in contact with the front wall (S100).

Next, as shown in FIGS. 17 and 18 , each chucking part 300 is applied to the plurality of tension members 101 exposed to the outside so that the plurality of chucking parts 300 are located near the tension member through-hole 210 , respectively. Combined (S200). Here, the chucking part 300 is coupled to a position spaced apart from the support block 200 with respect to the front wall, that is, the chucking part is not press-fitted into the tension member through-hole.

Next, as shown in FIGS. 17 and 19 , the press-fitting fixing part 600 is installed on the plurality of tension members 101 exposed to the outside ( S300 ). Specifically, the chucking pressure plate 610 and the pressure cylinder 630 are sequentially inserted so that the plurality of tension members 101 pass therethrough.

Here, the chucking head contact portions 621 and 622 of the chucking pressure plate 610 are inserted toward the support block 200 , that is, the chucking head contact portions 621 and 622 are inserted in a direction capable of contacting the chucking portion 300 . Both the chucking pressure plate 610 and the pressure cylinder 630 are provided to allow a plurality of tension members 101 to pass through and to be separated from the tension members 101 .

Next, as shown in FIGS. 17 and 20 , a tension member tension part 400 is installed on a plurality of tension members 101 exposed to the outside, but one side of the press-fit fixing part 600 is adjacent to the press-fit fixing part 600 . installed in (S400). Here, the tension member tension member 400 is to provide a tensile force to the tension member 101 , and, like the press-fit fixing part 600 , a plurality of tension members 101 are allowed to pass through and are detachable from the tension member 101 . will be prepared

Next, as shown in FIGS. 17 and 21 , the tension member tension part 400 is driven to tension the plurality of tension members 101 and maintain the tensioned state ( S500 ). Here, tension and maintenance of the tension member 101 are possible by supplying hydraulic pressure into the first hydraulic chamber 460 through the first hydraulic port 450 of the tension cylinder 470 . After the construction of one tension member is completed, the tension member tension part 400 is separated from the tension member and the second hydraulic chamber 490 is passed through the second hydraulic port 480 of the tension member 470 for the same repeated operation of the other tension member. ) when the hydraulic pressure is supplied into the tension piston 410 is restored to its initial state, and the same repetitive operation can be performed thereafter.

Next, as shown in FIGS. 17 and 22 , by driving the press-fitting fixing unit 600 to forcibly press-fit the plurality of chucking units 300 into the tension member through-hole 210 of the support block 200, respectively, the chucking unit (300) stably chucking and clamping the tension member 101 (S600). Here, as described above, the tension member 101 is in a tensioned state through the tension member tension part 400 , and the chucking part 300 chucks the tension member in the tensioned state.

Here, the press-fitting fixing unit 600 is a pressure cylinder 630 for pressing the chucking pressure plate in the direction of the support block 200, and a hydraulic pressure supply and removal unit capable of providing and removing the provided hydraulic pressure to the pressurizing cylinder 630. (640).

Although not specifically shown in the drawings, step S600 provides hydraulic pressure from the hydraulic pressure supply and removal unit 640 into the pressure cylinder 630 and confirms the supplied hydraulic pressure (S610), and the provided hydraulic pressure of step S610 is set as the standard It includes a step of determining whether the pressure exceeds (S620), and when the determination result of step S620 exceeds the set reference pressure, stopping the supply of hydraulic pressure to the pressurizing cylinder (630).

In other words, the present applicant has shown that the chucking part 300 is formed through the tension member through-hole ( 210) was confirmed to be completely press-fitted to the inside. The hydraulic pressure supply and removal unit 640 is provided with a hydraulic gauge (not shown) for displaying the intensity of the hydraulic pressure supplied to the pressurized cylinder, and in step S620, the hydraulic pressure provided to the pressurized cylinder is approximately 8 to 12 ton/min at a flow rate (setting). It is determined whether the reference flow rate) is satisfied, and in step S630, if the current input flow rate exceeds this, the hydraulic pressure supply is stopped.

Meanwhile, in step S600, by adjusting the hydraulic pressure supplied into the pressure cylinder 630 from the hydraulic pressure supply and removal unit 640, the plurality of chucking units 300 are press-fitted into the tension member through-hole 210 to chuck the plurality of tension members. You can control the degree of chucking.

In the actual work site, the operator can make the hydraulic pressure more than the above-described set reference pressure be supplied from the hydraulic pressure supply and removal unit 640 to the hydraulic chamber, and according to the occurrence of various variables at the work site, the hydraulic pressure supply value is appropriately adjusted to the chucking unit The chucking degree of 300 may be adjusted.

Next, as shown in FIGS. 17 and 23, the tension member tension part 400 and the press-fit fixing part 600 are sequentially removed from the tension member 101, and the tension member protruding from the support block is removed by cutting, leaving only an appropriate length. do (S700). Accordingly, only the tension member clamped by the chucking part 300 forcibly press-fitted into the tension member through hole 210 of the support block 200 remains. At this time, through the contact friction between the inner surface of the chucking part 300 and the tension member 101 (contact friction between a plurality of contact grooves formed on the inner surface of the chucking piece and the outer surface of the tension member), the tension member clamping state by the forced press-fitting of the chucking part, the tension member 101 can stably maintain the tensioned state.

In the foregoing, the present invention has been shown and described in connection with preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the construction and operation as shown and described as such. Rather, it will be apparent to those skilled in the art that many changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims.

101: tension member 200: support block
210: tension member through hole 300: chucking part
320: head 330: contact groove
400: tension member tension part 440: chucking part for tension
600: press-fitting fixing unit 610: chucking pressure plate
611: pressure base 612: concave groove
621,622: chucking head contact portion 625: central cylindrical portion
630: pressurized cylinder 633: cylinder cover block
634: one hydraulic chamber 638: elastic restoration part
639: elastic restoration part insertion groove 640: hydraulic supply and removal part

Claims (18)

A front wall having a plurality of tension members having one end inserted into the tension member insertion groove of the cut excavation surface front wall and fixed at the ends, and a plurality of tension member through holes so that the plurality of tension members can pass through individually, and supporting the cut excavation surface A construction apparatus for constructing a support block capable of contacting and supporting the .
a tension member tension part configured to allow the plurality of tension members to pass therethrough and to be separable from the tension member, and provided to tension the plurality of tension members and maintain the tensioned state; and
The plurality of tension members are provided so as to be penetrated between the support block and the tension member tension part, and the plurality of chucking parts are provided to be separable from the support block and the tension member so as to be press-fitted to the inside of the tension member through-hole by pressing the plurality of chucking parts; A press-fitting fixing part capable of directly contacting the head of the chucking part but having a chucking head contact part made of a material having a relatively low hardness compared to the chucking part,
The press-fitting fixing part,
a chucking pressure plate provided on one side of the support block to be in contact with the plurality of chucking parts;
a pressure cylinder capable of press-fitting a plurality of chucking parts into the tension member through-holes by pressing the chucking pressure plate in the direction of the support block; and
It includes a hydraulic pressure supply and removal unit capable of providing and removing the supplied hydraulic pressure to the pressure cylinder,
The chucking pressure plate includes a pressure base and the chucking head contact portion, the chucking head contact portion is provided on one side of the pressure base to be in direct contact with the head of the chucking portion, and the pressure base and the chucking head contact portion have a plurality of A plurality of through holes are provided so that the tension member passes through,
The pressure base includes a pressure base plate, an outer wall protruding along the circumferential direction of the pressure base plate to form a concave groove therein, and a center protruding from the center portion of the pressure base plate and protruding at the same height as the outer wall. comprising a cylindrical portion,
The chucking head contact portion has a relatively low hardness compared to the pressure base, and the plurality of through holes are formed between the central cylindrical portion and the outer wall,
The tension member construction apparatus of the anchor system introducing tension force, characterized in that the chucking head contact portion is provided only in the concave groove portion other than the central cylindrical portion. delete According to claim 1,
The pressure cylinder is
A cylinder housing of a hollow shape through which both ends are penetrated;
a pressure piston coupled to the cylinder housing to be reciprocally movable along the longitudinal direction of the cylinder housing and supported in contact with one surface of the chucking pressure plate; and
and a cylinder cover block coupled to one side of the cylinder housing to prevent separation according to the reciprocating movement of the pressure piston,
The tension member construction apparatus of the anchor system for introducing tension force, characterized in that the cylinder housing is provided with one hydraulic path communicating with the hydraulic chamber between the cylinder housing and the pressure piston and connected to the hydraulic pressure supply and removal unit. 4. The method of claim 3,
The tension member construction apparatus of the anchor system for introducing tension force, characterized in that the cylinder cover block is provided with an elastic restoring part for elastically pressing the pressure piston to restore it to an initial position when the hydraulic pressure of the hydraulic chamber is removed. 5. The method of claim 4,
The elastic restoration part is provided in plurality and is respectively inserted into a plurality of elastic restoration part insertion grooves formed to be spaced apart from each other along the circumferential direction of the cylinder cover block, and one end thereof is inserted so as to be elastically contacted and supported by the pressure piston. A tension member construction device of an anchor system that introduces tension. delete According to claim 1,
The chucking head contact portion is a tension member construction apparatus for introducing a tension force, characterized in that the metal is welded into the concave groove and integrally formed with the pressing base. According to claim 1,
The chucking head contact part is plastic injection molded and fixed to the concave groove through forced press-fitting. delete delete delete A plurality of tension members having one end inserted into the tension member insertion groove of the front wall of the cut excavation method surface and fixed at the ends, a support block provided with a plurality of tension member through holes to allow the plurality of tension members to pass through individually; In a construction apparatus including a plurality of chucking parts each press-fitted into the hole and capable of chucking a plurality of tension members, by pressing the plurality of chucking parts toward the support block,
pressurized base; and
It is provided on one side of the pressure base so as to be in direct contact with the head of the chucking part, and includes a chucking head contact part made of a material having a relatively low hardness compared to the chucking part,
A plurality of through holes are provided in the pressure base and the chucking head contact portion so that a plurality of tension members pass therethrough,
The pressure base includes a pressure base plate, an outer wall protruding along the circumferential direction of the pressure base plate to form a concave groove therein, and a center protruding from the center portion of the pressure base plate and protruding at the same height as the outer wall. comprising a cylindrical portion,
The chucking head contact portion has a relatively low hardness compared to the pressure base, and the plurality of through holes are formed between the central cylindrical portion and the outer wall,
The chucking head contact portion is provided only in the concave groove portion other than the central cylindrical portion. 13. The method of claim 12,
The chucking head contact portion is formed integrally with the pressing base by welding metal in the concave groove. 14. The method of claim 13,
The pressure base includes an aluminum alloy steel material, and the chucking head contact portion includes a copper material. 13. The method of claim 12,
The chucking head contact portion is plastic injection-molded, and the chucking pressure plate of the tension member construction apparatus for introducing a tension force, characterized in that it is fixed to the concave groove through forced press-fitting.
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