Novel anchorage device of pre-tensioning method prestressed concrete electric pole

Abstract

The utility model discloses a novel anchorage device of a pre-tensioning method prestressed concrete electric pole, which belongs to the field of anchorage devices and comprises an outer mold, high-performance concrete is poured in the outer mold, and a plurality of prestressed steel bars are embedded in the high-performance concrete. The small anchorage device structure is composed of a positioning plate, a small anchorage device retraction layer, a small anchorage device body, a clamping piece and an anchor rod body, and the large anchorage device structure is composed of a large anchorage device body and a large anchorage device retraction layer. By means of the novel anchorage device, the defects that in an existing pre-tensioning method prestressed component technical scheme, prestressed steel bars need to be cut, the environment is polluted, tensioning is unbalanced, and the design value is limited are overcome, the situation that the prestressed steel bars are cut in the tensioning process can be avoided through the novel anchorage device, and the anchorage device breaks through the limitation of the prior art to the upset head strength; and compared with the prior art, the anchorage device is more reasonable in stress and not prone to damage, and it is guaranteed that the prestressed steel bars are tensioned in a balanced mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of anchorage device, especially a new type of anchorage device for pre-tensioned prestressed concrete pole. BACKGROUND

[0002] Prestressed concrete refers to a method of pre-tensioning a steel bar during the prefabrication of a concrete member to improve the crack resistance of the reinforced concrete member and avoid early cracks in the reinforced concrete member.

[0003] Pre-tensioning is a construction process in which a prestressed steel bar is tensioned before pouring concrete, and the tensioned prestressed steel bar is temporarily anchored on a pedestal or a steel mold, then the concrete is poured, and when the concrete curing reaches 75% of the design strength value of the concrete, the prestressed steel bar is released, and the prestressed concrete is applied to the concrete by the adhesion of the concrete and the prestressed steel bar. The construction process of pre-tensioning is generally only applicable to the production of small and medium-sized components in fixed prefabrication plants.

[0004] In the prior art, the existing anchorage device has the following problems in actual use:

[0005] 1. During the separation of the prestressed main steel bar and the anchorage device, the prestressed main steel bar needs to be cut, which requires cold protection of the steel bar and inevitably causes loss of part of the stress;

[0006] 2. During the cutting of the prestressed steel bar, harmful gases and dust are inevitably generated, which poses a threat to the environment and the health of the workers;

[0007] 3. The prestressed main steel bar is connected to the anchorage device through a upsetting head, which is limited by the strength of the upsetting head and cannot use higher performance prestressed steel bars;

[0008] 4. During the tensioning process, the stress is concentrated on the contact surface of the upsetting head and the anchorage device, which is much greater than the strength of the anchorage device material, causing uneven damage to the anchorage device and resulting in uneven tensioning of the prestressed main steel bar. UTILITY MODEL CONTENTS

[0009] The main purpose of the utility model is to provide a new type of anchorage device for pre-tensioned prestressed concrete poles, which can effectively solve the problems in the background art.

[0010] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0011] The utility model provides a new type of anchorage device of prestressed concrete electric pole of pre-tensioning method, including the outer mould, the inside casting of high performance concrete of outer mould, and the inside pre -buried of high performance concrete is a plurality of root prestressed reinforcement, the left end of outer mould is equipped with outer mould support, the left end inside of outer mould is equipped with small anchorage device mechanism, and small anchorage device mechanism includes positioning plate, small anchorage device retraction layer, small anchorage device body and anchor rod body, the first positioning hole of positioning plate and small anchorage device retraction layer all are through the sleeve on the side wall on prestressed reinforcement, and small anchorage device body is through the sleeve on the side wall anchor expansion hole on prestressed reinforcement, and is fixedly connected with prestressed reinforcement through the symmetrical clamping piece in anchor expansion hole, one end of anchor rod body is fixedly connected with small anchorage device body, and the right end outside of outer mould support is equipped with big anchorage device mechanism, big anchorage device mechanism includes big anchorage device body and big anchorage device retraction layer, big anchorage device retraction layer is through the second positioning hole on the side wall protruding and the sleeve together with the other end prestressed reinforcement, and big anchorage device body is also fixedly connected with the other end prestressed reinforcement through the symmetrical clamping piece in the side wall anchor expansion hole.

[0012] Preferably, the side wall of the positioning plate and the small anchorage device retraction layer is provided with a first positioning hole corresponding to the prestressed reinforcement, and the positioning plate and the small anchorage device retraction layer are sequentially sleeved on the prestressed reinforcement through the first positioning hole.

[0013] Preferably, the small anchorage device body is in the shape of a boss, and the side wall of the small anchorage device body and the side wall of the big anchorage device body are respectively provided with an anchor expansion hole corresponding to the prestressed reinforcement, the anchor expansion hole is in the shape of a taper, and a set of symmetrical clamping pieces in the same shape as the anchor expansion hole are inserted and installed in the anchor expansion hole.

[0014] Preferably, the side wall of the small anchorage device body is further provided with an anchor rod connecting hole, one end of the anchor rod body is threadedly connected with the anchor rod connecting hole, and a force-releasing anchor bolt and a fastening anchor bolt are respectively fixedly installed on the outside of the anchor rod body.

[0015] Preferably, the side wall of the big anchorage device retraction layer is fixedly installed with a plurality of protrusions corresponding to the prestressed reinforcement, and the side wall of the protrusion is provided with a second positioning hole and sleeved on the prestressed reinforcement through the second positioning hole.

[0016] Preferably, the small anchorage device retraction layer and the big anchorage device retraction layer are both composed of an elastic material.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model discloses a small anchor structure and a big anchor structure are used in mutual cooperation, the new anchor solves the defects of having to cut prestressed reinforcement, polluting the environment, uneven tension and limited design value in the prior art prestressed member technology scheme, the new anchor can avoid cutting prestressed reinforcement in the tension process, the anchor breaks through the limitation of the upsetting head strength of the prior art, can adopt higher strength prestressed reinforcement, and the anchor stress is more reasonable than the prior art, is not easy to damage, guarantees prestressed reinforcement tension balance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole structure schematic view of concrete pole two ends of the utility model;

[0020] Figure 2 It is the whole structure cutaway schematic view of the utility model's Figure 1

[0021] Figure 3 It is the structure split schematic view of small anchor mechanism of the utility model;

[0022] Figure 4 It is the structure split schematic view of big anchor structure of the utility model;

[0023] Figure 5 It is the cutaway schematic view of small anchor body of the utility model;

[0024] Figure 6 It is the structure schematic view of the utility model's clamping piece.

[0025] In the drawing: 1, outer mould; 2, high-performance concrete; 3, prestressed reinforcement; 4, outer mould support; 5, small anchor mechanism; 6, big anchor mechanism; 7, force-releasing anchor bolt; 8, fastening anchor bolt; 9, positioning plate; 10, small anchor retracting layer; 11, first positioning hole; 12, small anchor body; 13, anchor hole; 14, anchor rod connecting hole; 15, clamping piece; 16, anchor rod body; 17, big anchor body; 18, big anchor retracting layer; 19, protrusion; 20, second positioning hole. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0027] For example, Figure 1 - Figure 6 ​As shown, a new type of anchorage device for pre-tensioning prestressed concrete electric pole, including the outer mold 1, the inside of the outer mold 1 is poured with high-performance concrete 2, and several root prestressed steel bars 3 are embedded in the high-performance concrete 2, the left end of the outer mold 1 is also provided with an outer mold support 4, the left end of the outer mold 1 is provided with a small anchorage mechanism 5, and the small anchorage mechanism 5 includes a positioning plate 9, a small anchorage retraction layer 10, a small anchorage body 12 and an anchor rod body 16, the positioning plate 9 and the small anchorage retraction layer 10 are both sleeved on the prestressed steel bar 3 through the first positioning hole 11 on the side wall, and the small anchorage body 12 is sleeved on the prestressed steel bar 3 through the anchorage hole 13 on the side wall, and is fixedly connected with the prestressed steel bar 3 through the symmetrical clamping pieces 15 in the anchorage hole 13, one end of the anchor rod body 16 is fixedly connected with the small anchorage body 12, and the right end of the outer mold support 4 is externally provided with a large anchorage mechanism 6, the large anchorage mechanism 6 includes a large anchorage body 17 and a large anchorage retraction layer 18, the large anchorage retraction layer 18 is sleeved together with the other end of the prestressed steel bar 3 through the second positioning hole 20 on the side wall protrusion 19, and the large anchorage body 17 is also fixedly connected with the other end of the prestressed steel bar 3 through the symmetrical clamping pieces 15 in the anchorage hole 13 on the side wall.

[0028] As shown in Figure 3 , the side walls of the positioning plate 9 and the small anchorage retraction layer 10 are provided with first positioning holes 11 corresponding to the prestressed steel bars 3, and the positioning plate 9 and the small anchorage retraction layer 10 are sequentially sleeved on the prestressed steel bars 3 through the first positioning holes 11 respectively, and the positioning plate 9 and the small anchorage retraction layer 10 are sequentially positioned and sleeved on the several prestressed steel bars 3 through the first positioning holes 11;

[0029] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6 , the small anchorage body 12 is in the shape of a boss, and the side walls of the small anchorage body 12 and the large anchorage body 17 are respectively provided with anchorage holes 13 corresponding to the prestressed steel bars 3, the anchorage holes 13 are in the shape of a cone, and a set of symmetrical clamping pieces 15 with the same shape as the anchorage holes 13 are inserted and installed in the inside of the anchorage holes 13, after the small anchorage body 12 and the large anchorage body 17 are sleeved on the prestressed steel bars 3 through the anchorage holes 13, the symmetrical clamping pieces 15 are put into the anchorage holes 13, so that when the small anchorage body 12 and the large anchorage body 17 exert tension on the prestressed steel bars 3, the small anchorage body 12 and the large anchorage body 17 can be locked together with the prestressed steel bars 3 under the action of stress through the clamping pieces 15;

[0030] As shown in Figure 3As shown, the side wall of the small anchor body 12 is also provided with an anchor rod connecting hole 14, and the anchor rod body 16 is threadedly connected to the anchor rod connecting hole 14 at one end, and the outer part of the anchor rod body 16 is respectively fixedly provided with a force-releasing anchor bolt 7 and a fastening anchor bolt 8, so that the anchor rod body 16 is threadedly connected to the anchor rod connecting hole 14 at one end and connected to the tensioning device at the other end, so as to tension the prestressed steel bar 3, and the force-releasing anchor bolt 7 on the anchor rod body 16 can adjust the prestress, and the large anchor body 17 can be fixed to the outer mold support 4 through the fastening anchor bolt 8;

[0031] As shown in the drawings, the side wall of the large anchor body 17 is provided with a plurality of protrusions 19 corresponding to the prestressed steel bar 3, and the side wall of the protrusion 19 is provided with a second positioning hole 20 and is sleeved on the prestressed steel bar 3 through the second positioning hole 20, and the large anchor body 17 is positioned and sleeved on the prestressed steel bar 3 through the second positioning hole 20 of the protrusion 19. Figure 4

[0032] As shown in the drawings, the side wall of the large anchor body 17 is provided with a plurality of protrusions 19 corresponding to the prestressed steel bar 3, and the side wall of the protrusion 19 is provided with a second positioning hole 20 and is sleeved on the prestressed steel bar 3 through the second positioning hole 20, and the large anchor body 17 is positioned and sleeved on the prestressed steel bar 3 through the second positioning hole 20 of the protrusion 19. Figure 4 As shown in the drawings, the small anchor body 10 and the large anchor body 18 are both made of elastic material, and the elastic material structure of the small anchor body 10 and the large anchor body 18 can provide a retracting space for the clamping piece 15, so as to pull out the clamping piece 15 when the small anchor body 12 and the large anchor body 17 are disassembled.

[0033] The specific use principle of the small anchor mechanism 5 and the large anchor mechanism 6 is as follows:

[0034] ​First, the positioning plate 9 and the small anchor retraction layer 10 are positioned and assembled on the several prestressed steel bars 3 through the first positioning hole 11 opened on the side wall, the several prestressed steel bars 3 present a reinforcement cage shape, then the small anchor body 12 is assembled on the prestressed steel bars 3 through the anchor hole 13 opened on the side wall, then the several groups of symmetrical clamping pieces 15 are put into the anchor hole 13 and tightly attached to the prestressed steel bars 3, so that the anchor hole 13 is wrapped in the symmetrical clamping pieces 15, then the large anchor retraction layer 18 is assembled on the other end of the prestressed steel bars 3, so that the prestressed steel bars 3 pass through the second positioning hole 20 opened on the corresponding protrusion 19 installed on the side wall of the large anchor retraction layer 18, and the large anchor retraction layer 18 is placed at the right end of the outer mold 1, then the large anchor body 17 is also assembled on the prestressed steel bars 3 through the anchor hole 13 opened on the side wall, so that it is placed on the right side of the large anchor retraction layer 18, and the symmetrical clamping pieces 15 are put into the anchor hole 13, so that the clamping pieces 15 wrap the prestressed steel bars 3 in the anchor hole 13, then the anchor rod body 16 is screwed into the anchor rod connecting hole 14 also opened on the side wall of the small anchor body 12 through the outer mold support 4, then the tension anchor 7 and the fastening anchor 8 are screwed into the anchor rod body 16 in turn, and finally the other end of the anchor rod body 16 is connected with the output end of the tension device, in this way, the prestressed steel bars 3 can be tensioned, when the small anchor body 12 is subjected to tensioning force through the anchor rod body 16 during tensioning, the tensioning force will be transmitted to the clamping pieces 15 in the anchor hole 13 of the small anchor body 12, the clamping pieces 15 continuously close to the prestressed steel bars 3 under the action of tensioning stress, in this way, the small anchor body 12 can be locked with the prestressed steel bars 3 together, similarly, the large anchor body 17 will also be locked with the prestressed steel bars 3 together through the clamping pieces 15 after being subjected to tensioning force, and the tensioning force applied to the small anchor body 12 and the large anchor body 17 can be evenly distributed to each prestressed steel bar 3, ensuring that each prestressed steel bar 3 receives the same tensioning force, at the same time, when the small anchor body 12 and the large anchor body 17 simultaneously tension the prestressed steel bars 3, the design value is no longer limited by the strength of the pier head, and prestressed steel bars 3 with higher performance can be used;

[0035] When the small anchor body 12 and the large anchor body 17 need to be disassembled, after the high-performance concrete 2 is poured in the outer mold 1 so that the pre-stressed steel bar 3 is pre-buried, the one end of the anchor rod body 16 is disconnected with the tensioning device, the tension anchor 7 and the fastening anchor 8 are unscrewed, the anchor rod body 16 is unscrewed from the anchor rod connecting hole 14 and taken down, the large anchor body 17 is pushed in the stress direction, the large anchor body 17 extrudes the large anchor body retraction layer 18, the large anchor body retraction layer 18 and the protrusions 19 on the side wall are elastically deformed according to the elastic material characteristics after being blocked by the outer mold support 4, thus, the retraction space is provided for the clamping piece 15 in the anchor hole 13, the stress applied by the clamping piece 15 to the pre-stressed steel bar 3 is released, the clamping piece 15 can be pulled out of the anchor hole 13, after the clamping piece 15 is pulled out, the large anchor body 17 is taken off from the pre-stressed steel bar 3, the large anchor body retraction layer 18 is taken off from the pre-stressed steel bar 3, at this time, the small anchor body 12 is pushed in the opposite direction of the stress, and the small anchor body retraction layer 10 is extruded so as to be elastically deformed according to the elastic material characteristics after being blocked by the positioning plate 9, thus, the retraction space is provided for the clamping piece 15 in the anchor hole 13, the stress applied by the clamping piece 15 to the pre-stressed steel bar 3 is released, the clamping piece 15 can be pulled out of the anchor hole 13, after the clamping piece 15 is pulled out, the small anchor body 12, the small anchor body retraction layer 10 and the positioning plate 9 are taken off from the pre-stressed steel bar 3 in sequence, so that the pre-stressed steel bar 3 does not need to be cut in the process of being separated from the anchor, the problems of stress loss, harmful gas and dust are avoided, and the problems of threats to the environment and the health of the workers are avoided.

[0036] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, various modifications and substitutions can be made to the present application without departing from the scope of the present application, equivalent components can be substituted, or some technical features can be substituted, as long as they are within the spirit and principle of the present application.

Claims

1. A novel anchorage for a prestressed concrete pole using the pre-tensioning method, comprising an outer mold (1), wherein high-performance concrete (2) is poured inside the outer mold (1), and several prestressed steel bars (3) are pre-embedded inside the high-performance concrete (2), and an outer mold support (4) is provided at the left end of the outer mold (1), characterized in that: The left end of the outer mold (1) is internally provided with a small anchor mechanism (5), and the small anchor mechanism (5) comprises a positioning plate (9), a small anchor retraction layer (10), a small anchor body (12) and an anchor rod body (16), the positioning plate (9) and the small anchor retraction layer (10) are both sleeved on the prestressed steel bar (3) through the first positioning hole (11) on the side wall, and the small anchor body (12) is sleeved on the prestressed steel bar (3) through the anchor hole (13) on the side wall, and is fixedly connected with the prestressed steel bar (3) through the symmetrical clamping pieces (15) in the anchor hole (13), one end of the anchor rod body (16) is fixedly connected with the small anchor body (12), and the right end of the outer mold support (4) is externally provided with a large anchor mechanism (6), the large anchor mechanism (6) comprises a large anchor body (17) and a large anchor retraction layer (18), the large anchor retraction layer (18) is sleeved together with the prestressed steel bar (3) at the other end through the second positioning hole (20) on the side wall protrusion (19), and the large anchor body (17) is also fixedly connected with the prestressed steel bar (3) at the other end through the symmetrical clamping pieces (15) in the anchor hole (13) on the side wall.

2. A new type of anchorage device for pre-stressed concrete pole according to the pretensioning method as claimed in claim 1, characterized in that: The side wall of the positioning plate (9) and the small anchor retraction layer (10) is provided with the first positioning hole (11) corresponding to the prestressed steel bar (3), and the positioning plate (9) and the small anchor retraction layer (10) are sequentially sleeved on the prestressed steel bar (3) through the first positioning hole (11) respectively.

3. A new type of anchorage device for pre-stressed concrete poles according to the pretensioning method as claimed in claim 2, characterized in that: The small anchor body (12) is in the shape of a boss, and the side wall of the small anchor body (12) and the side wall of the large anchor body (17) are respectively provided with the anchor hole (13) corresponding to the prestressed steel bar (3), the anchor hole (13) is in the shape of a cone, and a group of symmetrical clamping pieces (15) which are the same as the anchor hole (13) are inserted and mounted in the anchor hole (13).

4. A new type of anchorage device for pre-stressed concrete poles according to the pretensioning method as claimed in claim 3, characterized in that: The side wall of the small anchor body (12) is also provided with the anchor rod connecting hole (14), one end of the anchor rod body (16) is threadedly connected with the anchor rod connecting hole (14), and the outer part of the anchor rod body (16) is also fixedly mounted with the force-releasing anchor bolt (7) and the fastening anchor bolt (8) respectively.

5. A new type of anchorage device for pre-stressed concrete poles according to the pretensioning method as claimed in claim 4, characterized in that: The side wall of the large anchor retraction layer (18) is fixedly mounted with a plurality of protrusions (19) corresponding to the prestressed steel bar (3), and the side wall of the protrusion (19) is provided with the second positioning hole (20) and is sleeved on the prestressed steel bar (3) through the second positioning hole (20).

6. A new type of anchorage device for pre-stressed concrete poles according to the pretensioning method as claimed in claim 5, characterized in that: The small anchor retraction layer (10) and the large anchor retraction layer (18) are both composed of elastic material.

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