阅读说明：本技术 一种钢绞丝预应力锚固工艺 (Steel strand pre-stress anchoring process ) 是由 孔瑞扬 王俊 于 2020-07-20 设计创作，主要内容包括：本发明属于土木工程设备技术领域,具体为一种钢绞丝预应力锚固工艺,该安装工艺包括如下步骤：将带有镀层的钢绞丝穿入锚具中,并使钢绞丝位于两活动夹片之间；向钢绞丝与活动夹片之间放入铁粉和碳粉；转动锚具使活动夹片上的防滑条嵌入钢绞丝上的纹路缝隙中；将固定螺栓旋入锚具上的安装孔中,根据钢绞丝的直径决定固定螺栓旋入尺寸,使得活动夹片夹紧在钢绞丝上；将得到的组装好的钢绞丝和锚具放在潮湿环境下存放8-10天后取出使用；本发明有效增大了锚具对钢绞丝的夹紧力度,降低松动的发生,从而在取出使用时可以充分保证其使用的稳定性。(The invention belongs to the technical field of civil engineering equipment, in particular to a steel strand pre-stress anchoring process, which comprises the following steps: penetrating the steel strand with the coating into the anchorage device, and enabling the steel strand to be positioned between the two movable clamping pieces; putting iron powder and carbon powder between the steel strand and the movable clamping piece; rotating the anchorage device to enable the anti-slip strips on the movable clamping pieces to be embedded into the grain gaps on the steel strand; screwing the fixing bolt into the mounting hole on the anchorage device, and determining the screwing size of the fixing bolt according to the diameter of the steel strand so that the movable clamping piece is clamped on the steel strand; placing the assembled steel strand and anchor in a humid environment for 8-10 days, and taking out for use; the steel strand anchor effectively increases the clamping force of the anchor on the steel strand, reduces the looseness, and can fully ensure the use stability when being taken out for use.)

1. A steel strand pre-stress anchoring process is characterized by comprising the following steps:

s1: penetrating the steel strand with the coating into the anchorage device, and enabling the steel strand to be positioned between the two movable clamping pieces;

s2: on the basis of S1, putting iron powder and carbon powder between the steel stranded wire and the movable clamping piece;

s3: on the basis of S2, rotating the anchorage device to enable the anti-skid strips on the movable clamping pieces to be embedded into the grain gaps on the steel strand;

s4: on the basis of S3, screwing the fixing bolt into the mounting hole on the anchorage device, and determining the screwing size of the fixing bolt according to the diameter of the steel strand wire so that the movable clamping piece is clamped on the steel strand wire;

s5: placing the assembled steel strand and anchorage obtained in the step S4 in a humid environment for 8-10 days, and taking out for use;

the anchorage device in the step S1 comprises an anchor body (1), a movable clamping piece (2) and a mounting block (3), wherein a through hole (4) for penetrating a steel strand is formed in the middle of the anchor body (1), and two symmetrical mounting holes (5) are formed in the anchor body (1) relative to the through hole (4); the mounting holes (5) are communicated with the through holes (4) through a plurality of connecting holes (7), and the mounting holes (5) are used for mounting fixing bolts (6); the middle section of the fixing bolt (6) is of a smooth round table structure, and the tail end of the fixing bolt (6) is of a threaded column structure; a sliding block (8) is arranged in the connecting hole (7); one end of the sliding block (8) is connected with a movable clamping piece (2) for clamping the steel strand; and a plurality of anti-slip strips (9) which are uniformly distributed are arranged on one surface of the movable clamping piece (2) which is in contact with the steel strand corresponding to the grain gap trend of the steel strand.

2. The steel strand pre-stress anchoring process of claim 1, wherein: grooves (11) are arranged on two side faces, in contact with the steel strand, of the anti-slip strips (9); the groove (11) is used for containing a mixture consisting of iron powder and carbon powder.

3. The steel strand pre-stress anchoring process of claim 1, wherein: the other end of the sliding block (8) is connected with a plug ring (10) for limiting the fixed bolt (6); the section of the plug ring (10) is of a half-circle arc structure, and the arc surface inclines towards the fixing bolt along the penetrating direction of the fixing bolt.

4. The steel strand pre-stress anchoring process of claim 1, wherein: the sliding blocks (8) are provided with multiple groups corresponding to the connecting holes (7) and the plug rings (10), and the sliding blocks (8) and the plug rings (10) are the same in size.

5. The steel strand pre-stress anchoring process of claim 1, wherein: the cross-sectional shape of activity clamping piece (2) is the arc structure of quarter circle and sets up for sliding block (8) symmetry, and activity clamping piece (2) are made for rubber materials.

Technical Field

The invention relates to the technical field of civil engineering equipment, in particular to a steel strand pre-stress anchoring process.

Background

The prestressed concrete is concrete which is applied with certain prestress in a tensile area of the concrete and generates certain compression deformation before a structure or a member bears a use load, the concrete can be divided into pre-tensioning prestressed concrete and post-tensioning prestressed concrete according to different prestressing modes, and an anchorage device is a fixing device for applying prestress to a prestressed tendon in the prestressed concrete member and plays an important role in prestressed concrete construction.

The prestressed anchorage device comprises a clamping piece and a cushioning spring, wherein a steel strand is arranged inside the clamping piece, an anchor ring is arranged on the outer surface of a filling layer, holes are formed in the upper end and the lower end of the anchor ring, the cushioning spring is connected with the anchor ring through a cushioning layer, a first connecting block is arranged at the left end of the clamping piece, a first lifting rod is arranged at the left end of the first connecting block, a supporting block is arranged at the left end of the first lifting rod, a second lifting rod is arranged at the inner end of the supporting block, a support is arranged on the second lifting rod, a sponge cushion layer is arranged on the support, a second connecting block is arranged on the right side of the outer end of the supporting block, and a third lifting rod is arranged at the right end of the second connecting block. This prestressed anchorage utensil, the anchor is more firm, and whole use is simple and convenient moreover, moves back the anchor convenience, can not cause the ground tackle to destroy when moving back the anchor, and the ground tackle can used repeatedly to reduce engineering cost.

In the process of implementing the invention, the inventor finds that at least the following problems in the prior art are not solved: 1. the clamping piece cannot be adjusted according to steel wires with different thicknesses, and needs to be selected by a user according to different conditions when in use, so that time and labor are wasted, the practicability of the device is reduced, and the firmness of the device is reduced; 2. the structure is comparatively complicated, and elevation structure fragile is comparatively unstable difficult for utilizing elevation structure to move back the anchor to it.

Therefore, a steel strand pre-stress anchoring process is provided.

Disclosure of Invention

The invention aims to provide a steel strand pre-stress anchoring process, which can fix steel strands with different thicknesses, improves the fixing firmness of the device by utilizing the threaded connection of a threaded rod and an anchor ring, has a simple structure, can realize anchor withdrawal by adjusting the distance between a clamping piece and the steel strand, and improves the practicability of the device so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a steel strand pre-stress anchoring process comprises the following steps:

s1: penetrating the steel strand with the coating into the anchorage device, and enabling the steel strand to be positioned between the two movable clamping pieces;

s2: on the basis of S1, putting iron powder and carbon powder between the steel stranded wire and the movable clamping piece;

s3: on the basis of S2, rotating the anchorage device to enable the anti-skid strips on the movable clamping pieces to be embedded into the grain gaps on the steel strand;

s4: on the basis of S3, screwing the fixing bolt into the mounting hole on the anchorage device, and determining the screwing size of the fixing bolt according to the diameter of the steel strand wire so that the movable clamping piece is clamped on the steel strand wire;

s5: placing the assembled steel strand and anchorage obtained in the step S4 in a humid environment for 8-10 days, and taking out for use;

the anchor device in the step S comprises an anchor body, a movable clamping piece and a mounting block, wherein a through hole for penetrating the steel strand is formed in the middle of the anchor body, and two symmetrical mounting holes are formed in the anchor body relative to the through hole; the mounting holes are communicated with the through holes through a plurality of connecting holes and are used for mounting fixing bolts; the middle section of the fixing bolt is of a smooth round table structure, and the tail end of the fixing bolt is of a threaded column structure; a sliding block is arranged in the connecting hole; one end of the sliding block is connected with a movable clamping piece for clamping the steel strand; and a plurality of anti-slip strips which are uniformly distributed are arranged on one surface of the movable clamping piece, which is in contact with the steel strand, corresponding to the grain gap trend of the steel strand. The steel strand is placed between the two movable clamping pieces in the anchor, the fixing bolt is screwed into the mounting hole, the movable clamping pieces are clamped on the surface of the steel strand by utilizing the circular truncated cone structure extrusion sliding block in the middle section of the fixing bolt along with the penetration of the fixing bolt, and the position of the fixing bolt is fixed by matching with the thread structure at the tail end of the fixing bolt, so that the movable clamping pieces are stably and continuously clamped on the surface of the steel strand.

Preferably, grooves are formed in two side faces, in contact with the steel twisted wires, of the anti-slip strips; the groove is used for accommodating a mixture consisting of iron powder and carbon powder; when the anti-skid device works, the grain gaps on the steel stranded wires with different sizes are different in size, and the grooves are formed in the anti-skid strips, so that the anti-skid strips can meet the shape and size of the grain gaps when being deformed, the fit degree of the anti-skid strips and the steel stranded wires is improved, and the connection stability is improved; moreover, the groove can be used for accommodating a mixture consisting of iron powder and carbon powder, so that the iron powder and the carbon powder can be better attached to the surface of the steel strand along with the deformation of the anti-slip strip, the iron powder and the carbon powder are prevented from being separated from each other due to vibration when the steel strand is used, and the tension and the stability of the installation of the steel strand and the anchorage device are continuously ensured;

preferably, the other end of the sliding block is connected with a plug ring for limiting the fixed bolt; the section of the plug ring is of a half-circle arc structure, and the arc surface inclines towards the fixing bolt along the penetrating direction of the fixing bolt. When the plug ring works, the plug ring is extruded by the circular truncated cone structure in the middle of the fixing bolt while the fixing bolt continuously and deeply extrudes the sliding block, and the plug ring deforms along the gap between the fixing bolt and the through hole to fill the gap, so that the mounting stability of the fixing bolt is effectively ensured; moreover, the arc surface of the plug ring inclines towards the fixing bolt along the depth direction of the fixing bolt, so that the wrapping supporting force of the plug ring on the circular truncated cone structure in the middle of the fixing bolt is more uniform, the stress on the surface of the fixing bolt is uniform, and the service life of the fixing bolt is prolonged; and, along with the sliding block is extruded, the plug ring warp and seals the connecting hole, effectively avoids during iron powder and carbon powder get into the mounting hole from the connecting hole, avoids fixing bolt to appear because of the problem that the surface rusts and lead to bearing capacity to reduce.

Preferably, the sliding block all is equipped with the multiunit rather than connecting hole and the clearance ring that corresponds the setting, and the size of multiunit sliding block and clearance ring is the same. When the steel wire twisting machine works, the clamping force of the movable clamping pieces on the steel twisting wires is effectively increased by the multiple groups of sliding blocks; simultaneously, because the size of multiunit sliding block and cock ring is the same, along with fixing bolt's continuation deepening, the clamp force that fixing bolt thick place received is big more, avoids thin place atress to be greater than thick place and leads to the circumstances such as bending, rupture to take place, effectively guarantees fixing bolt to the fastening ability of steel hank silk.

Preferably, the cross-sectional shape of activity clamping piece is quarter circular arc structure and sets up for the sliding block symmetry, and the activity clamping piece is made for rubber materials.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the anti-slip strips on the movable clamping pieces are embedded into the lines on the steel strand by rotating the anchor, so that a mixture of iron powder and carbon powder introduced between the steel strand and the movable clamping pieces is better attached to the lines on the steel strand, and then the movable clamping pieces are clamped on the steel strand by continuously screwing the fixing bolts into the mounting holes, after the clamped steel strand and the anchor are placed in a humid environment for storage for one day, the iron powder and the carbon powder are affected with moisture to generate chemical changes to form iron rust, so that gaps between the movable clamping pieces and the steel strand are further filled and tensioned, the clamping force of the anchor on the steel strand is effectively increased, the looseness is reduced, and the use stability of the anchor can be fully ensured when the anchor is taken out for use; moreover, the steel stranded wire is provided with the coating, so that the corrosion of rust to the steel stranded wire can be effectively avoided, and the use stability of the steel stranded wire is further improved;

2. due to the fact that the line gaps on the steel stranded wires with different sizes are different in size, the grooves are formed in the anti-slip strips, so that the anti-slip strips can meet the shape and size of the different line gaps when being deformed, the fit degree of the anti-slip strips and the steel stranded wires is improved, and the connection stability is improved; and, the slot can be used to hold the mixture of constituteing by iron powder and carbon powder for iron powder and carbon powder can be along with the better laminating of the deformation of antislip strip on steel strand wires surface, avoid steel strand wires to lead to iron powder and carbon powder to deviate from because of vibrations when using, realize lasting tensile force and the stability of guaranteeing steel strand wires and ground tackle installation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the present invention as viewed from the direction B of FIG. 1;

fig. 4 is a schematic structural view of the cleat of the present invention.

In the figure: the anchor comprises an anchor body 1, a movable clamping piece 2, a mounting block 3, a through hole 4, a mounting hole 5, a fixing bolt 6, a connecting hole 7, a sliding block 8, an anti-slip strip 9, a plug ring 10 and a groove 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: a steel strand pre-stress anchoring process comprises the following steps:

s1: penetrating the steel strand with the coating into the anchorage device, and enabling the steel strand to be positioned between the two movable clamping pieces;

s2: on the basis of S1, putting iron powder and carbon powder between the steel stranded wire and the movable clamping piece;

s3: on the basis of S2, rotating the anchorage device to enable the anti-skid strips on the movable clamping pieces to be embedded into the grain gaps on the steel strand;

s4: on the basis of S3, screwing the fixing bolt into the mounting hole on the anchorage device, and determining the screwing size of the fixing bolt according to the diameter of the steel strand wire so that the movable clamping piece is clamped on the steel strand wire;

s5: placing the assembled steel strand and anchorage obtained in the step S4 in a humid environment for 8-10 days, and taking out for use;

the anti-slip strips on the movable clamping pieces are embedded into the lines on the steel strand through rotating the anchorage device, so that a mixture of iron powder and carbon powder introduced between the steel strand and the movable clamping pieces is better attached to the lines on the steel strand, and then the movable clamping pieces are clamped on the steel strand through continuously screwing the fixing bolts into the mounting holes, after the clamped steel strand and the anchorage device are placed in a humid environment for 8-10 days, the iron powder and the carbon powder are affected with moisture and undergo chemical changes to form iron rust, so that gaps between the movable clamping pieces and the steel strand are further filled and tensioned, the clamping force of the anchorage device on the steel strand is effectively increased, the looseness is reduced, and the use stability of the anchorage device can be fully ensured when the anchorage device is taken out for use; moreover, the steel stranded wire is provided with the coating, so that the corrosion of rust to the steel stranded wire can be effectively avoided, and the use stability of the steel stranded wire is further improved;

the anchor device in the step S1 includes an anchor body 1, a movable clamping piece 2 and a mounting block 3, wherein a through hole 4 for passing a steel strand is formed in the middle of the anchor body 1, and two symmetrical mounting holes 5 are formed in the anchor body 1 relative to the through hole 4; the mounting holes 5 are communicated with the through holes 4 through a plurality of connecting holes 7, and the mounting holes 5 are used for mounting fixing bolts 6; the middle section of the fixing bolt 6 is of a smooth round table structure, and the tail end of the fixing bolt 6 is of a threaded column structure; a sliding block 8 is arranged in the connecting hole 7; one end of the sliding block 8 is connected with the movable clamping piece 2 for clamping the steel strand; and a plurality of anti-slip strips 9 which are uniformly distributed are arranged on one surface of the movable clamping piece 2, which is in contact with the steel strand, corresponding to the grain gap trend of the steel strand. Put the steel hank silk between two activity clamping pieces 2 in the ground tackle, through screwing in fixing bolt 6 to mounting hole 5, along with fixing bolt 6's deepening, utilize the round platform structure extrusion sliding block 8 in fixing bolt 6 middle section to press from both sides the tight surface at the steel hank silk of activity clamping piece 2, the helicitic texture of cooperation fixing bolt tail end makes fixing bolt 6's position can fix to the tight surface at the steel hank silk of clamp that makes activity clamping piece 2 stably last.

As shown in fig. 4, grooves 11 are arranged on two side surfaces of the anti-slip strip 9, which are in contact with the steel strand wires; the groove 11 is used for accommodating a mixture consisting of iron powder and carbon powder; when the anti-skid device works, the grain gaps on the steel twisted wires with different sizes are different in size, and the grooves 11 are formed in the anti-skid strips 9, so that the anti-skid strips can meet the shape and size of the grain gaps when being deformed, the fitting degree of the anti-skid strips 9 and the steel twisted wires is improved, and the connection stability is improved; in addition, the groove 11 can be used for accommodating a mixture consisting of iron powder and carbon powder, so that the iron powder and the carbon powder can be better attached to the surface of the steel strand along with the deformation of the anti-slip strip 9, the iron powder and the carbon powder are prevented from being separated from each other due to vibration when the steel strand is used, and the tension and the stability of the installation of the steel strand and the anchorage device are continuously ensured;

as shown in fig. 2, the other end of the sliding block 8 is connected with a plug ring 10 for limiting the fixing bolt 6; the cross-sectional shape of the plug ring 10 is an arc structure of a half circle, and the arc surface is inclined toward the fixing bolt along the fixing bolt penetration direction. When the plug ring type sliding block works, the plug ring 10 is extruded by the circular truncated cone structure in the middle of the fixing bolt 6 while the fixing bolt 6 continuously deeply extrudes the sliding block 8, and deforms along the gap between the fixing bolt 6 and the through hole 4 to fill the gap, so that the mounting stability of the fixing bolt 6 is effectively ensured; moreover, the arc surface of the plug ring 10 inclines towards the fixing bolt along the depth direction of the fixing bolt, so that the wrapping supporting force of the plug ring 10 on the circular truncated cone structure in the middle of the fixing bolt 6 is more uniform, the surface of the fixing bolt 6 is uniformly stressed, and the service life of the fixing bolt 6 is prolonged; and, along with sliding block 8 is extruded, the filler ring 10 warp and seals the connecting hole, effectively avoids iron powder and carbon powder to get into mounting hole 5 from connecting hole 7 in, avoids fixing bolt 6 to lead to the problem that bearing capacity reduces because of the surface rusts to appear.

As shown in fig. 1, the sliding blocks 8 and the connecting holes 7 and the plug rings 10 which are correspondingly arranged are provided with multiple sets, and the sizes of the multiple sets of sliding blocks 8 and the plug rings 10 are the same. When the steel twisted wire clamping device works, the clamping force of the movable clamping pieces 2 on the steel twisted wire is effectively increased by the multiple groups of sliding blocks 8; simultaneously, because the size of multiunit sliding block 8 is the same with stopper ring 10, along with fixing bolt 6's continuation deepening, the clamp force that fixing bolt 6 thick place received is big more, avoids thin place atress to be greater than thick place and leads to the condition emergence such as bending, rupture, effectively guarantees fixing bolt 6 to the fastening ability of steel hank silk.

As shown in fig. 2, the cross-sectional shape of the movable jaw 2 is an arc structure of a quarter circle and is symmetrically arranged about the sliding block 8, and the movable jaw 2 is made of rubber material.

The specific working process is as follows:

the steel strand is placed between two movable clamping pieces 2 in the anchorage device, the fixed bolt 6 is screwed into the mounting hole 5, the sliding block 8 is extruded by the circular truncated cone structure at the middle section of the fixed bolt 6 along with the penetration of the fixed bolt 6, and the position of the fixed bolt 6 is fixed by matching with the thread structure at the tail end of the fixed bolt, so that the movable clamping pieces 2 are stably and continuously clamped on the surface of the steel strand;

the grain gaps on the steel twisted wires with different sizes are different in size, and the grooves 11 arranged on the anti-slip strips 9 can enable the anti-slip strips to meet the shape and size of the grain gaps when the anti-slip strips are deformed, so that the fitting degree of the anti-slip strips 9 and the steel twisted wires is improved, and the connection stability is improved; and, slot 11 can be used to hold the mixture of constituteing by iron powder and carbon powder for iron powder and carbon powder can be along with the better laminating of the deformation of antislip strip 9 on steel strand wires surface, avoid steel strand wires to lead to iron powder and carbon powder to deviate from because of vibrations when using, realize continuously guaranteeing tensile force and stability that steel strand wires and ground tackle were installed

The anti-slip strips on the movable clamping pieces are embedded into the lines on the steel strand through rotating the anchorage device, so that a mixture of iron powder and carbon powder introduced between the steel strand and the movable clamping pieces is better attached to the lines on the steel strand, and then the movable clamping pieces are clamped on the steel strand through continuously screwing the fixing bolts into the mounting holes, after the clamped steel strand and the anchorage device are placed in a humid environment for 8-10 days, the iron powder and the carbon powder are affected with moisture and undergo chemical changes to form iron rust, so that gaps between the movable clamping pieces and the steel strand are further filled and tensioned, the clamping force of the anchorage device on the steel strand is effectively increased, the looseness is reduced, and the use stability of the anchorage device can be fully ensured when the anchorage device is taken out for use; moreover, the steel stranded wire is provided with the coating, so that the corrosion of rust to the steel stranded wire can be effectively avoided, and the use stability of the steel stranded wire is further improved;

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.