CN109826323B - Flexible high-strength connecting rib and assembly method thereof - Google Patents
Flexible high-strength connecting rib and assembly method thereof Download PDFInfo
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- CN109826323B CN109826323B CN201910212966.4A CN201910212966A CN109826323B CN 109826323 B CN109826323 B CN 109826323B CN 201910212966 A CN201910212966 A CN 201910212966A CN 109826323 B CN109826323 B CN 109826323B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 238000004873 anchoring Methods 0.000 claims abstract description 33
- 230000000452 restraining effect Effects 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 9
- 238000005056 compaction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Abstract
A flexible high-strength connecting rib and an assembly method thereof comprise two anchoring ends, a sleeve and a steel cable; the anchoring end is provided with an anchor cap, a constraint sleeve and at least one wedge block, the constraint sleeve is provided with a reducing hole, the wedge blocks are positioned in the reducing hole and are provided with through holes, and the anchor cap is arranged at one end of the constraint sleeve; two ends of the steel cable are respectively inserted into the restraining sleeves of the two anchoring ends and pass through the through holes, the end parts of the steel cable are also hammered into the needle body to form outer expansion ends, and the needle body ends press the anchor caps; the sleeve is sleeved on the steel cable and is positioned between the two anchoring ends. The invention is suitable for the flexible high-strength connecting rib of the assembled structure and the assembling method thereof, and can effectively avoid the problem of difficult splicing or difficult grouting caused by the deformation of the reinforcing steel bar.
Description
Technical Field
The invention relates to a connecting device of an assembled building component, in particular to a deformable flexible high-strength connecting rib and an assembling method thereof.
Background
The existing assembly structure adopts two connecting modes of wet type and dry type, but has advantages and disadvantages. The wet connection is to collect the embedded bars of the assembled structure to be connected to the junction area (or node area), then to form a formwork around the junction area, to pour concrete, to connect the assembled structure into a whole. The connection has the advantages of high connection rigidity and good integrity. But the reinforcement quantity of the intersection area is large, the reinforcement is crowded, so that the installation is difficult, and the post-poured concrete is difficult to pour and compact.
Dry connections do not require substantial casting of concrete, and typically use welding or bolting. And a connecting method (which belongs to wet connection and has a smaller grouting concrete amount) by using a grouting reinforcement sleeve. However, the grouting holes (pipes) of the grouting steel sleeve are often blocked due to insufficient protection in the construction process, so that concrete slurry cannot be injected to form an empty joint, and once the empty joint reaches a certain amount, the whole joint can be disconnected under the action of earthquake or wind load, so that serious consequences of house collapse are caused.
In practical engineering application, it is also found that a large number of overhanging steel bars in the connection mode are often difficult to splice due to collision deformation or construction deviation of the embedded sleeve in the transportation process, and even the phenomenon of violently cutting the steel bars exists. The connection mode is more troublesome, and besides the damage detection, no better nondestructive detection method exists.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a flexible high-strength connecting rib suitable for an assembled structure and an assembling method thereof, which can effectively avoid the problem of difficult splicing or difficult grouting caused by the deformation of the reinforcing steel.
The invention adopts the following technical scheme:
a flexible high-strength connecting rib is characterized in that: comprises two anchoring ends, a sleeve and a steel rope; the anchoring end is provided with an anchor cap, a constraint sleeve and at least one wedge block, the constraint sleeve is provided with a reducing hole, the wedge blocks are positioned in the reducing hole and are provided with through holes, and the anchor cap is arranged at one end of the constraint sleeve; two ends of the steel cable are respectively inserted into the restraining sleeves of the two anchoring ends and pass through the through holes, the end parts of the steel cable are also hammered into the needle body to form outer expansion ends, and the needle body ends press the anchor caps; the sleeve is sleeved on the steel cable and is positioned between the two anchoring ends.
The reducing hole comprises a round hole and a conical hole, one end of the conical hole is identical to and communicated with the inner diameter of the round hole, the inner diameter of the other end of the conical hole is larger than the inner diameter of the round hole, and the wedge block is located in the conical hole and is matched with the conical hole.
Three wedges are arranged in the reducing hole, and the through hole is formed in the center of the three wedges.
A wedge block is arranged in the reducing hole, and the through hole is formed in the center of the wedge block.
The anchor cap is in threaded fit with the constraining sleeve.
One of the anchor caps is also provided with a connecting rod, and the needle body compresses the connecting rod.
The number of the sleeves is at least one.
The inner side of the anchor cap is provided with a flat table surface, and the outer side of the anchor cap is provided with a cap tip.
The through hole is provided with a line section and a slope section, and the outward expansion end is positioned on the slope section.
An assembly method of a flexible high-strength connecting rib is used for connecting two components and is characterized in that: comprises the following steps of
1) Cutting the steel cable according to the length of the required connection;
2) One end of the steel cable is inserted into the restraint sleeve of one of the anchoring ends, the end part of the steel cable penetrates through the through hole of the wedge block, the end part of the steel cable is hammered into the needle body to form an outward expansion end, the anchor cap is covered on the end of the restraint sleeve and compresses the needle body, and the die cap is provided with a connecting rod;
3) The connecting rod is connected with the component in an anchoring way, concrete is poured, maintenance is carried out, and after the connecting rod is transported to an assembly site, a sleeve is sleeved on the steel cable;
4) Inserting the other end of the steel cable into a constraint sleeve of the other anchoring end, penetrating through a through hole of the wedge block, hammering the end into the needle body and forming an outward expansion end, and arranging an anchor cap at the end of the constraint sleeve and pressing the needle body;
5) And (3) installing the other member with the grouting hole in place, grouting slurry, hoisting and positioning the member with the flexible high-strength connecting rib, enabling the other anchoring end to face downwards, extruding the other anchoring end into the grouting hole until the flexible high-strength connecting rib sinks in place, temporarily fixing, and connecting the two members into a whole after the slurry reaches the design strength.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
1. the connecting rib has strong tensile pulling capacity in the axial direction, and can meet the requirement of internal force transmission of the stressed reinforcing steel bars at the joints of the prefabricated parts.
2. The connecting rib of the invention also has a certain lateral deformation capability, and the flexible steel cable can not generate bending deformation due to collision in the hoisting or transportation process before incomplete splicing. When the two spliced parts or the overhanging connecting ribs and the grouting holes have an unadjustable error, the flexible connecting ribs can be completely inserted into the grouting holes through lateral deformation of the flexible connecting ribs, and the assembly of the components is not affected.
3. According to the connecting rib assembling method, the non-shrinkage high-strength grouting material is pre-poured into the grouting holes, and then the redundant slurry is extruded through extrusion of the flexible connecting ribs. The grouting compaction in each grouting hole can be practically ensured, and potential safety hazards such as non-compaction grouting and holes caused by blockage of the grouting holes or the grouting outlets in the current back pressure grouting mode can be effectively avoided.
4. The connecting rib is simple to manufacture and reliable in connection, can be used at the connection part of the components such as the assembled shear wall, the beam, the column and the like, and avoids the problem of difficult installation caused by deformation in the transportation or hoisting process of the conventional overhanging connecting rib.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of an anchor head (with connecting rods);
FIG. 3 is a top view of the constraining sheath;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a bottom view of the restraint sleeve;
FIG. 6 is a top view of the wedge;
FIG. 7 is a sectional view B-B of FIG. 6;
FIG. 8 is a bottom view of the wedge;
FIG. 9 is a top view of the anchor cap;
FIG. 10 is a cross-sectional view of C-C of FIG. 9;
FIG. 11 is a bottom view of the anchor cap;
FIG. 12 is a block diagram of a screw;
FIG. 13 is a view showing the structure of the needle body;
FIG. 14 is a block diagram of an anchor head (without tie bars);
FIG. 15 is a top view of the constraining sheath;
FIG. 16 is a D-D sectional view of FIG. 15;
FIG. 17 is a bottom view of the restraint sleeve;
FIG. 18 is a top view of the anchor cap;
FIG. 19 is a sectional E-E view of FIG. 18;
FIG. 20 is an assembled view of the connecting bar;
1-connecting rods;
2-anchor caps, 21-holes, 22-nut clamping positions, 23-platform surfaces and 24-cap tips;
3-needle body;
4-wedge blocks, 41-slope sections and 42-line sections;
5-constraint sleeve, 51-conical hole, 52-round hole and 53-round table;
6, a sleeve;
7-steel ropes, 71-outer expansion ends;
8-grouting material;
9-concrete;
10-stressed steel bars, 11-connecting plates and 12-grouting holes.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to fig. 1 to 19, a flexible high-strength connecting rib includes two anchor ends, a sleeve 6, a wire rope 7, and the like. The anchor head comprises an anchor cap 2, a constraining sheath 5 and at least one wedge 4. Referring to fig. 3 to 5, the constraining sheath 5 is provided with a reducing hole comprising a circular hole 52 and a tapered hole 51, wherein the tapered hole 51 is similar to an inverted horn hole, one end of the tapered hole 51 is identical to and communicated with the inner diameter of the circular hole 52, and the inner diameter of the other end of the tapered hole is larger than the inner diameter of the circular hole 52, namely, the side wall of the tapered hole 51 forms an inclined plane. The outer periphery of the constraint sleeve 5 is provided with threads.
Referring to fig. 6 to 8, the at least one wedge 4 is located in the tapered hole 51 and is formed with a through hole, the outer sidewall of the wedge 4 is in slant fit with the sidewall of the tapered hole 51, and the inner sidewall is provided with slant and grain. The through hole formed comprises a roughened section 42 and a trapezoid-shaped section 41.
Referring to fig. 9 to 11, the anchor cap 2 is covered at one end of the constraining sheath 5, i.e. the end with larger aperture, and the inner wall of the anchor cap 2 is provided with threads to be in threaded engagement with the constraining sheath 5. The inner wall of the anchor cap 2 is also provided with a nut clamping position 22, and the outer side wall is provided with a spanner clamping position. The connection mode between the anchor cap 2 and the constraint sleeve 5 is not exclusive, and other detachable connection modes can be adopted. The two ends of the steel cable 7 are respectively inserted into the restraining sleeves 5 of the two anchoring ends and penetrate through the through holes, the end parts of the steel cable 7 are further hammered into the needle body 3 to form an outer expansion end 71, the outer expansion end 71 is positioned at the slope section 41 of the through holes, the surface of the needle body 3 can be subjected to indentation or non-indentation treatment, and the end of the needle body 3 presses against the anchor cap 2. The needle body 3 is a wedge-shaped needle.
When the steel rope 7 is pulled to tightly fit the wedge 4 with the inner wall of the conical hole 51, the wedge 4 and the conical hole 51 are mutually pressed more and more tightly due to the mechanical engagement action of the end head of the steel rope 7 on the wedge 4 when the steel rope 7 is subjected to downward pulling force, so that the steel rope 7 is anchored, and the tensile strength of the steel rope is fully exerted.
Referring to fig. 2, an anchor cap 2 of one of the anchor ends is provided with a hole 21 for installing a connecting rod 11, the connecting rod 11 may be a high-strength bolt, a needle body 3 may press the connecting rod 11, three wedges 4 are disposed in the reducing hole of the anchor end, and a through hole is formed at the center of the three wedges 4.
Referring to fig. 14 to 19, the other anchor head is not provided with a connecting rod 11, and three wedges 4 are also provided in the reducing holes thereof, the through holes being formed at the centers of the wedges 4. An inverted trapezoidal round table 53 is formed on the outer side of the constraint sleeve 5. The inner side of the anchor cap 2 is provided with a flat table surface 23 for pressing the needle body 3, and the outer side is provided with a cap tip 24. The number of the wedge blocks 4 is not unique, and can be two, four and the like according to the requirement.
The sleeve 6 is sleeved on the steel cable 7 and is positioned between two anchoring ends, and is a metal sleeve, the number of the sleeve can be one, two or more, and the sleeve can be cut according to the length of the needed connection without limitation. The steel cord 7 is a low-relaxation high-strength prestressed steel cord.
Referring to fig. 20, the invention further provides an assembling method of the flexible high-strength connecting rib, which is used for connecting two components, and comprises the following steps:
1) The low-relaxation high-strength prestressed wire rope 7 is cut to the desired length of the connection (plus 2 times the anchoring length).
2) One end of the steel cable 7 is inserted into a round hole 52 of the constraint sleeve 5 of one anchoring end (with a connecting rod 11) and penetrates through the through hole of the wedge block 4, and the end of the steel cable 7 is slightly higher than the top surface of the wedge block 4; then the wedge-shaped needle body 3 is hammered into the middle of the steel wire from the end head of the steel cable 7 to form an outer expansion end 71, and the steel cable 7 is pulled tightly to enable the wedge block 4 to be matched with the conical hole 51 of the constraint sleeve 5 for compaction; the anchor cap 2 is covered at the end of the constraint sleeve 5 and compresses the needle body 3, the connecting rod 11 passes through the hole 21 of the anchor cap 2, then the anchor cap 2 is covered on the constraint sleeve 5 to be buckled, and the screw thread is screwed, so that the end part of the connecting rod 11 compresses the needle body 3.
3) The connecting rod 11 is connected with the member in an anchoring manner (for example, the connecting rod 11 is directly welded with the stress steel bar 10 or is connected with a connecting plate 11 (angle steel or section steel and the like) pre-buried at the end part of the stress steel bar 10), and the stress steel bar 10 is connected with the anchoring end through the connecting rod 11, so that the tensile capacity transfer of the stress steel bar 10 is realized.
The anchoring end is tightly attached to a concrete template, a hole is formed in the template, the steel cable 7 is penetrated out, temporary protection is carried out on the steel cable 7, then concrete 9 is poured, and an exposed insertion end assembly type component of the steel cable 7 is formed. After the completion of the form removal maintenance, as the steel cable 7 is a flexible body, the steel cable is not required to be worried about being collided and deformed by mistake in the hoisting or transportation process, the concrete 9 is poured, the maintenance is carried out, and the steel cable is transported to an assembly site.
Before hoisting the assembled structure on the site, sleeving a sleeve 6 made of metal (or other hard plastic or other materials) slightly larger than the steel strands on the periphery of the steel cable 7, cutting the sleeve 6 according to the length of the exposed steel cable (the anchoring length of the lower end is subtracted) by the total length of the sleeve 6, and then applying the anchoring end at the lower end to anchor to form a flexible connecting rib with a certain compressive resistance capacity but a certain flexible deformation capacity laterally. The phenomenon that the two-part assembly type component is difficult or even impossible to install due to bending of the embedded bars or manufacturing errors of the mounting holes can be effectively prevented.
4) The other end of the steel cable 7 is inserted into the restraining sleeve 5 of the other anchoring end, the wedge block 4 is installed in the conical hole 51 of the restraining sleeve 5, the end of the steel cable 7 passes through the through hole of the wedge block 4, the end is also hammered into the needle body 3 and forms an outward expansion end 71, the anchor cap 2 is covered at the end of the restraining sleeve 5, and the platform surface 23 of the anchor cap abuts against the needle body 3. The exposed section of the flexible connecting rib not only has high tensile bearing capacity, but also has certain lateral deformation capacity.
5) The corresponding position of the flexible connecting rib of the component can be provided with a pre-buried connecting hole (the connecting hole can be prefabricated by adopting a metal threaded pipe and the like and is connected with the stressed rib on the side with enough strength), and the length of the pre-buried connecting hole is slightly longer than the overhanging length of the flexible connecting rib (about 3-5 cm).
After the assembly type component with the embedded connecting hole facing upwards is positioned and temporarily fixed, a small amount of water is used for wetting the grouting hole 12, non-shrinkage high-strength grouting material is poured into the grouting hole 12, and a certain distance is reserved between the liquid surface of the grouting material 8 and the top surface of the grouting hole 12, so that excessive overflow of the grouting material 8 is avoided after the flexible connecting rib is inserted.
Hoisting and positioning the member with the flexible high-strength connecting rib, enabling the cap tip 24 of the other anchoring end to face downwards, slowly lowering the member, extruding the flexible connecting rib into the grouting holes 12 by utilizing the self weight of the member until the flexible high-strength connecting rib sinks in place, temporarily fixing, and connecting the two members into a whole after the grouting material 8 reaches the design strength.
In step 5), the height of the grout 8 from the orifice is calculated from the volume of the flexible joint bar (containing the anchor head). The volume of the flexible connecting rib (containing the anchoring end) can be obtained by a measuring cylinder filled with water by a discharge method. And the volume of the grouting material 8 actually filled into the embedded connecting hole is slightly larger than the required grouting material 8.
The foregoing is merely illustrative of specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the design concept shall fall within the scope of the present invention.
Claims (7)
1. A flexible high-strength connecting rib is characterized in that: comprises two anchoring ends, a sleeve and a steel rope; the anchor end is provided with an anchor cap, a constraint sleeve and at least one wedge block, the constraint sleeve is provided with a variable diameter hole, a plurality of wedge blocks are positioned in the variable diameter hole and are provided with through holes, the anchor cap is arranged at one end of the constraint sleeve, three wedge blocks are arranged in the variable diameter hole, the through holes are formed in the centers of the three wedge blocks, and the through holes are provided with pattern sections and slope sections; the two ends of the steel cable are respectively inserted into the restraining sleeves of the two anchoring ends and pass through the through holes, the end parts of the steel cable are also hammered into the needle body to form outer expansion ends, the outer expansion ends are positioned on the slope sections, the needle body ends are tightly pressed against the anchor caps, a connecting rod is further arranged on one of the anchor caps, and the needle body is tightly pressed against the connecting rod; the sleeve is sleeved on the steel cable and is positioned between the two anchoring ends.
2. A flexible high strength joint bar according to claim 1, wherein: the reducing hole comprises a round hole and a conical hole, one end of the conical hole is identical to and communicated with the inner diameter of the round hole, the inner diameter of the other end of the conical hole is larger than the inner diameter of the round hole, and the wedge block is located in the conical hole and is matched with the conical hole.
3. A flexible high strength joint bar according to claim 1, wherein: a wedge block is arranged in the reducing hole, and the through hole is formed in the center of the wedge block.
4. A flexible high strength joint bar according to claim 1, wherein: the anchor cap is in threaded fit with the constraining sleeve.
5. A flexible high strength joint bar according to claim 1, wherein: the number of the sleeves is at least one.
6. A flexible high strength joint bar according to claim 1, wherein: the inner side of the anchor cap is provided with a flat table surface, and the outer side of the anchor cap is provided with a cap tip.
7. An assembly method of a flexible high-strength connecting rib is used for connecting two components and is characterized in that: a method for making a flexible high strength joint bar as claimed in any one of claims 1 to 6, comprising the steps of
1) Cutting the steel cable according to the length of the required connection;
2) One end of the steel cable is inserted into the restraint sleeve of one of the anchoring ends, the steel cable penetrates through the through hole of the wedge block, the end part of the steel cable is hammered into the needle body to form an outward expansion end, the anchor cap is covered on the end of the restraint sleeve and compresses the needle body, and the anchor cap is provided with a connecting rod;
3) The connecting rod is connected with the component in an anchoring way, concrete is poured, maintenance is carried out, and after the connecting rod is transported to an assembly site, a sleeve is sleeved on the steel cable;
4) Inserting the other end of the steel cable into a constraint sleeve of the other anchoring end, penetrating through a through hole of the wedge block, hammering the end into the needle body and forming an outward expansion end, and arranging an anchor cap at the end of the constraint sleeve and pressing the needle body;
5) And (3) installing the other member with the grouting hole in place, grouting slurry, hoisting and positioning the member with the flexible high-strength connecting rib, enabling the other anchoring end to face downwards, extruding the other anchoring end into the grouting hole until the flexible high-strength connecting rib sinks in place, temporarily fixing, and connecting the two members into a whole after the slurry reaches the design strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212966.4A CN109826323B (en) | 2019-03-20 | 2019-03-20 | Flexible high-strength connecting rib and assembly method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212966.4A CN109826323B (en) | 2019-03-20 | 2019-03-20 | Flexible high-strength connecting rib and assembly method thereof |
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| Publication Number | Publication Date |
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| CN109826323A CN109826323A (en) | 2019-05-31 |
| CN109826323B true CN109826323B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910212966.4A Active CN109826323B (en) | 2019-03-20 | 2019-03-20 | Flexible high-strength connecting rib and assembly method thereof |
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| CN113062458B (en) * | 2021-04-02 | 2022-06-03 | 西南科技大学 | Ground tackle and wood structure connecting node with same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3596330A (en) * | 1964-10-13 | 1971-08-03 | Cementation Co Ltd The | Anchors for structural tensile members |
| CN101117838A (en) * | 2007-07-04 | 2008-02-06 | 湖南大学 | Bond type anchorage and anchoring method for anchoring fibre reinforced plastic reinforcement or bracing cable |
| WO2014098310A1 (en) * | 2012-12-21 | 2014-06-26 | 삼진스틸산업(주) | Removable ground anchor body using spring |
| CN209874067U (en) * | 2019-03-20 | 2019-12-31 | 华侨大学 | Flexible high-strength connecting rib |
-
2019
- 2019-03-20 CN CN201910212966.4A patent/CN109826323B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3596330A (en) * | 1964-10-13 | 1971-08-03 | Cementation Co Ltd The | Anchors for structural tensile members |
| CN101117838A (en) * | 2007-07-04 | 2008-02-06 | 湖南大学 | Bond type anchorage and anchoring method for anchoring fibre reinforced plastic reinforcement or bracing cable |
| WO2014098310A1 (en) * | 2012-12-21 | 2014-06-26 | 삼진스틸산업(주) | Removable ground anchor body using spring |
| CN209874067U (en) * | 2019-03-20 | 2019-12-31 | 华侨大学 | Flexible high-strength connecting rib |
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| CN109826323A (en) | 2019-05-31 |
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