CN114319340A - Recovery type anchor rod - Google Patents

Abstract

The invention discloses a recovery anchor rod, which consists of a bearing body and a fixing clamp fixed on the bearing body. The fixing jig includes a wire harness including a pull-out wire and a PC wire rope as a tension member, a fixing base support body fastened to the support body, and a fixing member fastened to the fixing base support body. The compression clamp of the PC steel wire rope is arranged around the drawing rope, the rear end part of the compression clamp is combined with the front end surface of the fixing base, the PC steel wire rope is limited along the groove of the fixing base, the recovery type anchor rod is also provided with a water pipe, the water pipe can extend into the anchor rod, water is injected into the anchor rod through the water pipe, the penetration of the condensation material into the anchor rod is prevented, the condensation material penetrating into the anchor rod is removed, and the wire harness is prevented from being adhered by the condensation material.

Description

Recovery type anchor rod

Technical Field

The present invention relates to a retractable anchor which is an anchor for fixing a PC wire rope firmly to an anchor body and finally removing the PC wire rope as a tensile member from the anchor solid.

Background

Conventionally, when anchoring a retaining wall is used in a city street and construction is performed close to a building site, for example, if a tensile member or the like for anchoring is left after anchoring is used, it becomes an obstacle to subsequent construction. Thus, a structure called a removable anchor is formed in which the anchor is removed after use. Removable anchors are mechanically removed, chemically removed, and chemically removed. The removable anchor, which is mechanically removed, is formed by joining a PC steel rod to the anchor body by means of a pipe joint, and removing the PC steel rod by pulling it out of the pipe joint by turning the PC copper rod; the anchorage to be removed by a mechanical method is to use a tension member made of a combination of a PC steel wire rope and a pull-off wire, to pull off the pull-off wire by applying tension during removal, and to pull out the PC steel wire rope constituting the tension member one by a tension bracket; the anchors that are chemically removed are pre-installed with heat generating or blasting devices along the free length of the tensile member, and upon removal these devices are activated to cut and remove the tensile member.

The conventional removal anchors described above have problems that the structure is complicated, the number of components thereof is large, the removal operation is complicated, and the reliability of the removal is unstable. As described above, since the anchors to be removed by the mechanical method are formed by using the tension member made of the combination of the PC wire rope and the pull-out wire, the pull-out wire is pulled out by applying tension during removal, and the PC wire rope constituting the tension member is pulled out one by the tension bracket, the tension bracket is required to be used during pulling out the PC wire rope, and a long pulling-out time is required.

In order to solve such problems, improved removal anchors have been developed, such as "removal anchor" disclosed in CN1217405, which provide a PC wire rope fixing jig capable of easily removing a PC wire rope constituting a tensile member with a manual force in a short time without affecting the yield strength of the anchor, and a removal anchor using the same.

However, the above-mentioned retractable bolt has the following problems in practical use: when the supporting body and the connected components adopt resin components, the problems of cracking, breakage and the like are easy to occur in the transportation or installation process, so that when high-pressure grouting is performed, a coagulating material such as cement and the like is often immersed into the anchor rod due to the breakage of the resin components, the coagulating material adheres the wire harness, the steel strand cannot be recycled integrally.

Disclosure of Invention

The object of the present invention is to provide an improved retrieval bolt which solves the above mentioned problems with retrieval bolts.

In order to achieve the purpose, the structure of the recovery type anchor rod designed by the invention mainly comprises a wire harness, a fixed base supporting body and a fixed member;

the wire harness is composed of a drawing-off wire with a front end pressed and connected with a first pressure clamp and a connector with a stop part at the front end connected on the upper surface, and a PC wire rope as a stretching member with a front end pressed and connected with a second pressure clamp, wherein the PC wire rope is configured by taking the connector with the drawing-off wire as the center, and the second pressure clamp of the PC wire rope is abutted with the stop part of the connector;

the wire harness passes through the fixed base, and grooves which can adjust the position of the PC wire rope and can make the wire rope fall off by drawing the drawing-off wire are arranged on the wall surface of the through hole of the fixed base at a specified interval;

the fixed base support body is penetrated with a wire harness, accommodated and fixed on the fixed base and fastened on the bearing body;

the fixing member is fastened to the fixing base support body and presses the central pull-out wire and the front end of the PC wire rope arranged around the central pull-out wire;

the components are assembled as follows: configuring a PC steel wire rope around the fixed base and the fixed member by taking the crimping clamp I or the connecting piece with the wire taken out as the center, and connecting the rear end part of the crimping clamp II of the PC steel wire rope with the front end part of the fixed base so that the PC steel wire rope is placed along the groove of the fixed base;

this recovery formula stock still disposes the water pipe, and it can stretch into inside the stock, through the water pipe toward the inside water injection of stock, when hindering the material of condensing to invade the stock inside, clears away the inside material of condensing of invading the stock, prevents that the material of condensing from gluing the pencil.

The fixing member is composed of a pressing member installed in the fixing base support and pressing the front end of the PC steel wire rope, and a cover body installed on the pressing member and fastened on the fixing base support.

The water pipe is fixed on the wiring harness of the recovery type anchor rod.

According to the improved recovery anchor rod, water is injected into the anchor rod through the water pipe in the fastening operation stage, the internal water pressure can prevent condensation materials such as mortar and cement emulsion from invading the interior of the anchor rod through the resin member, meanwhile, the flowing water flow can also remove the condensation materials invading the interior of the anchor rod, the condensation materials are prevented from adhering a wire harness, the steel strand cannot be recovered as a whole, and the subsequent wire harness cannot be recovered; in the removing operation stage, the pull-out wire exposed from the anchor rod is pulled by a large force by the pulling bracket, thereby crushing or breaking the stopper portion of the tip end of the coupling member of the pull-out wire, and the pull-out wire is pulled out from the fixed base between the tension members pressed against the crimping clamps, thereby releasing the tightened state of the crimping clamps tightened on the fixed base, and the PC wire rope is disengaged from the groove of the fixed base, so that the PC wire rope as the tension member can be easily pulled out one by one or several together by a human power or a crane, and the time of the pulling-out operation can be remarkably shortened.

Drawings

Fig. 1 is a schematic view of the retrieval bolt body of the present invention.

Fig. 2 is a longitudinal sectional view showing the fixing base at a section a-a of fig. 1.

Fig. 3 is a cross-sectional view showing the fixing base at a section b-b of fig. 1.

FIG. 4 is a cross-sectional view showing a state where the tension member and the drawdown wire are fastened to the fixing base.

Fig. 5 is a cross-sectional view of 5-5 of fig. 4.

Fig. 6 is a cross-sectional view taken along line 6-6 of fig. 4 (i.e., along line a-a of fig. 1).

Figure 7 is a cross-sectional view of the carrier shown in figure 1, taken at c-c.

Fig. 8 is a cross-sectional view of the d-d cross-sectional sleeve of fig. 1.

Fig. 9 is a cross-sectional view of the pressing member.

Fig. 10 is a sectional view of the cover.

Fig. 11 is a cross-sectional view of the PC wire rope pressed against the second pressing clamp.

FIG. 12 is a cross-sectional view of a pull-out wire crimped to a crimp clamp and having a coupling member bonded thereto.

Fig. 13 is an explanatory view for explaining a state where the fixing base is inserted into the fixing base support body and the fixing jig is assembled.

Fig. 14 is an explanatory view of the assembly fixing jig.

Fig. 15 is an explanatory view illustrating an anchoring working method using the recovery type anchor body of the present invention.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.

As shown in fig. 11, the second crimping clamp 32 is crimped to the respective distal ends of the PC wire rope 30. As shown in fig. 12, the leading end portion of the removal wire 40 for pulling by applying tension at the time of removal is also pressed against the first crimp jaw 42, and the coupling member 43 is bonded to the first crimp jaw 42, and a stopper portion 431 capable of being crushed or crushed is formed at the leading end thereof.

As shown in fig. l, the retractable anchor body 10 is composed of a bundle of a PC wire rope 30 and a withdrawal wire 40 as tension members, and a support body 11 passing through the bundle of wires, the PC wire rope 30, and a fixing jig 2 for withdrawing the wire 40. The fixing jig 2 for the PC wire rope 30 and the pull-out wire 40 is mainly composed of a fixing base support 20, a fixing base 21, and a fixing member. The fixed base support 20 is fastened to the support 11 by passing through a harness made of a PC wire 30 and a pull-out wire 40, which are crimped to the front ends by crimping clamps. The supporting body 11 is cylindrical, and the peripheral surface is preferably rough, and a product such as metal or fiber reinforced plastic can be used as the supporting body. The fixing base 21 is fixed by inserting a harness made up of a PC wire 30 and a pull-out wire 40, which are pressure-bonded to the front ends of pressure-bonding clamps, into the fixing base support 20 while bringing the rear ends of the pressure-bonding clamps into contact with the front end faces thereof. The fixing member is pressed against the front end of the wire harness and fastened to the fixing jig 2.

The fixing member is composed of a pressing member 22 installed in the fixing base support 20 to press the front end of the PC cable 30, and a cover 23 fixed to the fixing base support 20 and fitted with the pressing member 22. The fixing member may be constituted only by the cover 23 that is fastened to the fixing base support 20 while pressing the tip of the PC wire rope 30.

As shown in fig. 4, 7 and 8, the water pipe 6 can be fixed on the PC steel wire rope 30, and the front end of the water pipe is close to the rear end surface of the fixing base 21, so that water can be injected into the anchor rod through a matched water pump in the fastening operation stage, a certain water pressure is generated in the anchor rod, and the invasion of the condensed materials such as mortar and cement emulsion into the anchor rod through the resin member can be prevented, and meanwhile, the condensed materials invading into the recovery anchor can be removed by flowing water flow, so that the bundle can be prevented from being adhered by the condensed materials, and the steel strand cannot be recovered integrally, and the bundle cannot be recovered subsequently. The material and number of the water pipes 6 are not limited, and flexible pipes are preferably used. Meanwhile, the fixing position of the water pipe 6 is not limited, and it may be fixed to the PC wire rope 30, the pull-out wire 40, or it may be inserted into the anchor rod manually or mechanically during grouting, without being fixed in advance.

As shown in FIG. 1, the fixed base support 20 is provided with female threads capable of engaging with the male threads of the front end of the supporting body 11. As shown in fig. 2 to 6, the fixing base 21 has an axial through hole 211, and an axial groove 212 for adjusting the position of the PC wire rope 30 constituting the tension member and for separating the PC wire rope 30 constituting the tension member by pulling the pull-out wire 40 is integrally formed on the radially outer side of the axial through hole 211.

As shown in fig. 1 and 13, the pressing member 22 is fitted into the fixed base support 20, and then the lid 23 is engaged with the fixed base support 20, whereby the distal ends of the PC wire rope 30 and the pull-out wire 40, which constitute a tension member, disposed at the distal end of the fixed base 21 can be pressed. As shown in fig. 9, the pressing member 22 fixes the PC wire rope 30 and the pull-out wire 40 constituting the tension member, and the pressure clamp pair 32, the pressure clamp pair 42, or the coupling member 43, which are pressed against each other, so that they cannot move in the axial direction in the fixing jig 2. The pull-out cord has a disk-shaped fixing portion 221 which is in contact with the front ends of the pull-out cord 40 and the PC wire cord 30 constituting the tension member and is in contact with the front ends of the second crimp pincer 32, the first crimp pincer 42, and the coupling 43, and a leg portion 222 which is in contact with the bottom of the lid 23. Further, the pressing member 22 may be inserted into and integrated with the lid 23, the pressing member 22 may press the distal ends of the PC wire rope 30 and the pull-out wire 40 constituting the tension member, or the distal ends of the second pressure contact clamp 32 and the first pressure contact clamp 42, which are respectively pressed and bonded, or the distal end of the coupling 43, and the PC wire rope 30 and the pull-out wire 40 constituting the tension member may be fixed so as not to move in the axial direction in the fixing jig 2.

As shown in fig. 11, the second crimping jaws 32 are crimped to respective distal end portions of the PC wire rope 30 constituting the tension member. As shown in fig. 12, the front end of the removal string 40 for pulling by tension at the time of removal is also pressed against the first crimp jaw 42, and a coupling member 43 is bonded to the first crimp jaw 42, and the coupling member 43 has a stopper portion 431 formed at the front end thereof so as to be crushable or crushable.

As shown in fig. 4, a first crimping jaw 42 is crimped onto the front end portion of the removal wire 40, and a coupling member 43 having a stopper portion 431 formed crushably or crushably at the front end thereof is bonded to the first crimping jaw 42; a PC wire rope 30 as a tension member having a tip end pressed against the second crimp pincer 32 is arranged around the draw-out wire 40 configured as described above to form a wire harness, and the wire harness is inserted into the fixing base 21; the second crimp pliers 32 of the PC wire 30 as the tension member is brought into contact with the stopper 431, and the rear ends of the second crimp pliers 32 are brought into close contact with the front end of the fixed base 21, and the PC wire 30 is disposed in the groove 212 of the fixed base 21, and the PC wire 30 is tightened. An inclined portion 432 is formed at the rear end of the coupling 43, and the pull-off cord 40 can be pulled off with a small pulling force when the PC wire rope 30 as a tension member is finally removed. Next, as shown in fig. 13 and 14, a wire harness formed by arranging a PC wire rope 30 as a tension member around a draw-off wire 40 is inserted from one end of the fixed base support 20; the fixed base 21 is inserted into and fixed to the fixed base support 20. Inserting the PC wire rope 30 from one end of the supporting body 11 around the pull-out wire 40, and engaging and fastening the rear end of the fixed base supporting body 20 with the front end of the supporting body 11; inserting the pressing member 22 into the fixed base support 20 so that the pressing surface 221 presses the respective distal ends of the pull-out cord 40 and the PC wire rope 30 as a tension member; next, the cover 23 is engaged with and fastened to the front end of the fixed base support 20, and the leg 222 of the pressing member 22 is pressed. The PC wire rope 30 and the pull-out wire 40, which are tensile members, are fixed in the fixing jig 2, and the rear end of the fixed base support 20 is engaged with the front end of the support body 11, and after the bush 12 is mounted on the support body 11, the retractable anchor body 10 is assembled in such a manner that the PC wire rope 30 and the pull-out wire 40, which are tensile members, can be removed.

The operation of the present retrieval type anchor will be described with reference to fig. 15.

(1) Fastening operation

An anchor hole is first drilled in the ground and the housing is inserted. On the other hand, the sleeve 5 is connected to the above-described retrieval type anchor body 10 and inserted into the anchor hole. Next, a setting material such as mortar or cement emulsion is injected until the supporting body 11 is buried. When the setting material is not set, the casing is pulled out, the setting material such as mortar or cement emulsion is injected into the fastening area of the anchor rod under high pressure, meanwhile, water is injected into the anchor rod through the water pipe 6, a certain water pressure is generated in the anchor rod, the setting material such as mortar or cement emulsion is prevented from entering the anchor rod through the resin member, and the flowing water flow can remove the setting material entering the anchor rod, so that the setting material is prevented from adhering the wire harness, and the steel strand cannot be recycled integrally. After the setting material is hardened, a tension bracket is arranged, and the PC wire rope 30 as a tension member exposed outside the hole is tensioned and fastened.

(2) Removal operation of PC Steel wire rope 30 as tension Member

Finally, after the purpose of use of anchoring is achieved, the anchor head 60 is detached, then the removal string 40 exposed from the anchor is pulled with a large force by the pulling bracket, the crushable or crushable stopper portion 431 of the front end of the coupling member 43 which is bonded to the crimping clip one 42 crimped to the front end portion of the removal string 40 is crushed or crushed, and the removal string 40 whose front end is crimped to the crimping clip one 42 is extracted from the fixing base 21. Then, the tightened state of the two crimping clamps 32 tightened to the front end of the fixed base 21 is released, whereby the PC wire rope 30 is disengaged from the groove 212 of the fixed base 21, and the PC wire rope 30 as the tension member is pulled out one by one or several by a human power or a crane.

The existing recovery type anchor rod is often broken due to the supporting body and the connected resin, and during grouting, a condensation material such as cement is immersed in the inner part of the anchor rod to adhere a wire harness, so that an integrated steel strand cannot be recovered. Therefore, the cleaning device realizes the cleaning of the immersed cement by additionally arranging the water pipe which is installed at the bottom of the bearing body in the whole process, prevents the wiring harness from being adhered by the condensed material and is beneficial to the recovery of the wiring harness.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.

Claims (3)

1. A recovery anchor rod mainly comprises a wire harness, a fixed base (21), a fixed base support body (20) and a fixed component;

the wire harness is composed of a drawing-out wire (40) with a front end pressed and connected with a first compression clamp (42) and a connector (43) with a stop part (431) connected on the upper surface, and a PC wire rope (30) which is a stretching member with a front end pressed and connected with a second compression clamp (32), wherein the PC wire rope (30) is configured by taking the connector (43) with the drawing-out wire (40) as the center, and the second compression clamp (32) of the PC wire rope (30) is abutted with the stop part (431) of the connector (43);

the wire harness passes through the fixed base (21), and a groove (212) which can adjust the position of the PC steel wire rope (30) and can make the PC steel wire rope (30) fall off by drawing the drawing wire (40) is arranged on the wall surface of the through hole (211) of the fixed base (21) at a specified interval;

the fixed base support body (20) is provided with a wire harness in a penetrating way, accommodates and is fixed on the fixed base (21), and is fastened on the supporting body (11);

the fixing member is fastened to the fixing base support body (20) and presses the central pull-out wire (40) and the front end of the PC wire rope (30) arranged around the central pull-out wire;

the components are assembled as follows: configuring a PC steel wire rope (30) around the fixed base (21) and the fixed member by taking a first crimping clamp (42) or a connecting piece (43) of the drawing-off wire (40) as a center, and connecting the rear end part of a second crimping clamp (32) of the PC steel wire rope (30) with the front end part of the fixed base (21) so that the PC steel wire rope (30) is placed along a groove (212) of the fixed base (21);

the method is characterized in that: this recovery formula stock still disposes water pipe (50), and it can stretch into inside the stock, through inside water injection of water pipe (50) toward the stock, when hindering the material of condensing to invade the stock inside, clears away the material of condensing who invades the stock inside, prevents that the material of condensing from gluing the pencil.

2. A retrieval bolt according to claim 1, wherein: the fixing member is composed of a pressing member (22) installed in the fixing base support body (21) and pressing the front end of the PC steel wire rope (30), and a cover body (23) which is installed on the pressing member (22) and fastened on the fixing base support body (21).

3. A retrieval bolt according to claim 1, wherein: the water pipe (50) is fixed on the wiring harness of the recovery type anchor rod.

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