CN102653989A - Steel bar rolling straight-thread sleeve connection construction method - Google Patents
Steel bar rolling straight-thread sleeve connection construction method Download PDFInfo
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- CN102653989A CN102653989A CN2012101211956A CN201210121195A CN102653989A CN 102653989 A CN102653989 A CN 102653989A CN 2012101211956 A CN2012101211956 A CN 2012101211956A CN 201210121195 A CN201210121195 A CN 201210121195A CN 102653989 A CN102653989 A CN 102653989A
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Abstract
The invention discloses a steel bar rolling straight-thread sleeve connection construction method which comprises the following steps of: step 1, processing steel bar straight-thread joints; and step 2, connecting the steel bar joints. The method has the advantages of high joint strength, high connection speed, simple equipment operation, stable and reliable performance, wide application range, convenience in construction, low joint price and the like; and meanwhile, the steel bar joint formed by the method has high reliability and stable structure, all performance indexes can meet the requirements of the technical regulations, and the steel bar joint is particularly suitable for connecting large-batch large-diameter steel bars at some important parts.
Description
Technical field
The present invention relates to the method for attachment of bar splice in a kind of building operations, be specifically related to a kind of rolling bar straight screw sleeve connection construction method.
Background technology
In existing construction process; Mechanical connection technique of reinforcement is that a new reinforcing steel bar connects technology; Be called as " third generation bar splice " after colligation, electric welding, have strength of joint be higher than parent material of reinforcement rebar, speed than fast 5 times of electric welding, pollution-free, save advantage such as steel 20%.
The technology of reinforcing steel bar machinery jointing mainly contains following several kinds: cover letter extruding connection, taper thread sleeve connection, the connection of jumping-up straight thread etc.; Sleeve extruding jointing: the joint that makes plastic strain of connector steel bushing and the tight interlock formation of Ribbed Bar through extruding force.Two kinds of forms are arranged, and radial compression connects and is connected with axial compression.Because axial compression connects the site operation inconvenience and joint quality is stable inadequately, do not obtain promoting; And the radial compression link technique, jointing has obtained large tracts of land and has promoted the use of, and the sleeve extruding jointing that uses in the engineering now all is that radial compression connects.
Taper thread jointing: the joint that forms through special tapered thread of steel bar end and the interlock of connector tapered thread.The birth of taper threaded connection technique has overcome the deficiency that sleeve extruding link technique exists.Taper thread silk head is prefabricated in advance fully, and on-the-spot the connection takies the duration weak point, and on-the-spot only the need used the moment wrench operated, need not move equipment and pull electric wire, receives the favorable comment of each unit in charge of construction deeply.But taper thread jointing quality is stable inadequately.Because the path of machining screw has weakened the cross-sectional area of mother metal, thereby has reduced strength of joint, generally can only reach 85～95% of the actual tensile strength of mother metal.
Jumping-up straight thread joint: through the joint of latter made straight thread of steel bar end jumping-up and the formation of connector threaded engagement.Its advantage of jumping-up straight thread joint is that intensity is high, and site operation speed is fast, and labor strength is low, and reinforced bar straight thread silk head is all prefabricated in advance, and the scene is connected to assembling work.Its weak point is to be prone in the upsetting process the inclined to one side phenomenon of upsetting, and upsets in case upset must cut away partially heavily; Produce internal stress in the upsetting process, steel bar thick part ductility reduces, and is prone to produce the brittle failure phenomenon, and screw thread processing needs two procedures two complete equipments to accomplish.
Summary of the invention
Goal of the invention: the objective of the invention is to deficiency to prior art; A kind of rolling bar straight screw sleeve connection construction method is provided, advantage such as this method has the strength of joint height, connection speed is fast, equipment is simple to operate, stable and reliable for performance, applied widely, easy construction, joint are cheap.
Technical scheme: a kind of rolling bar straight screw sleeve connection construction method of the present invention comprises the steps: the processing of step 1, reinforced bar straight thread joint; Comprise following operation:
(1-1) reinforcing bar ripping rib and rolling depressing rib machine is marched into the arena and is installed and the raw material of reinforcement rebar check;
(1-2) carry out steel bar blanking according to charger sheet; At first should the red line sign be used in the steel bar stretching straightening in the cut place, cut reinforcing bar with cutting machine then, the otch end face should with the reinforcing bar axis normal, with fine grinding wheel polishing reinforcing bar end face, make its smooth at last;
(1-3) steel bar end is carried out the roll forming mantle fiber with reinforcing bar ripping rib and rolling depressing rib machine,
At first steel bar end is immersed in the water-soluble lubricating liquid and soaked 1-2 minute,
Then reinforcing bar is eliminated through the reinforcing bar ripping rib and rolling depressing rib machine rib line that it is surperficial of adjusting direct and length in advance,
Take out reinforcing bar, once more it immersed in the water-soluble lubricating liquid and soaked 2-5 minute, make its cooling and lubricated surface, once more steel bar end is inserted reinforcing bar ripping rib and rolling depressing rib machine and carry out the roll extrusion mantle fiber,
Use the sand papering termination at last, make silk mouthful bright and clean, smooth, and with coarse plain emery wheel with the port hacking;
The length of strict control silk mouth in the process, a silk mouthful diameter surely closes with sleeve silk mouth diameter mutually;
(1-4) self check of a silk quality; At first carry out the presentation quality inspection; The snaggletooth number of end reinforced screw thread must be less than 3 teeth; Must be in the every circumference of screw thread part defects in teeth less than 1/4 week; Detect silk head length degree with calliper then, detect a silk diameter, qualified silk head is filled in detection record carry out the location colour-marking line with ring gauge; In splice, screw on plastic protective sleeve or straight thread connecting sleeve, the nose heave new processing of underproof silk;
(1-5) sampling observation of a silk quality, to its minute lot number inspect 10% at random by random samples, and be no less than 10, use the specialized barrel verification, defective if any a silk, promptly to this processing batch exhaustive test, defective silk should be processed through using after the assay was approved once more again;
(1-6) termination test specimen mechanical property test, the mechanical property field test of termination is undertaken by checking and accepting to criticize, and same execution conditions adopt ad eundem, same pattern, the same specification joint of same material down; Is one with 500 and checks and accepts batch that also checking and accepting as of 500 of less thaies batch calculated, when continuous 10 of scene is checked and accepted batch; Through electronic tension tester it being carried out tensile strength, elongation rate and yield strength detects; When whole test specimens once are when qualified, to check and accept batch joint quantity and can expand as 1500, each of butt joint is checked and accepted batch; Should randomly draw 3 test specimens and do the simple tension strength test; Its performance indications must all reach A level joint performance requirement among " reinforcing steel bar machinery connects the current techique rules " JGJ107-96, and are undesirable if any a test specimen tensile strength, should randomly draw 6 test specimens again and review; As still having a test specimen tensile strength undesirable, this is checked and accepted batch is defective;
Step 2, connecting reinforcement joint; Comprise following operation:
(2-1) examination of branch sleeve;
(2-2) protective cap on assembling reinforcement, the recovery reinforcing bar to be connected;
(2-3) reinforcing bar is connected through branch sleeve; At first steel bar end is smeared one deck wheel lubricating oil,
End with branch sleeve is installed on the termination of reinforcing bar then; With the work spanner it is tightened to colour-marking line; Again another steel bar end is screwed into the branch sleeve other end and tightens to colour-marking line; During operation; With work spanner revoling tube or reinforcing bar, the silk head is held out against at the sleeve pipe middle position, accomplish connection; The socket end limit should be dropped on the leader colo(u)r streak, and must not have the above complete silk mouth of two buttons to expose;
Check with torque spanner that (2-4) on the joint that connects, carry out the paint sign, the expression inspected is accomplished;
(2-5) mechanical property of bar splice test specimen experiment; Under the same execution conditions; Adopting ad eundem, same pattern, the same specification joint of same material, is that an inspection lot is tested and checked and accepted with 300 of continuous productions, also the calculating by an inspection lot of 300 of less thaies; To each inspection lot joint; Must be in the engineering structures of Hot work in progress at random 3 joint test specimens of intercepting make tensile strength and compression test, the result of reinforcing bar jointing field trial should meet the pertinent regulations among existing industry standard " reinforcing steel bar machinery the connects the current techique rules " JGJ107-2003;
(2-6) the antirust processing of bar splice is smeared one deck waterproof agent with the two ends of sleeve and the contact position of reinforcing bar, makes the water in the concrete can't get into joint inside.
(2-7) the parcel layer of steel wire net in the outside of bar splice, the reinforcing bar packages length at this gauze wire cloth and sleeve two ends is respectively 10-15cm.
Further, the examination of branch sleeve should be tested by DBJ/CT005-2002 5.1.7 bar regulation in the said step 2, and sleeve is answered defectives such as non-corroding, crackle; Should there be pollutions such as greasy dirt on the screw thread; The sleeve visual inspection is checked and accepted as one with 500 joints and is criticized, and presses 10% sampling observation for every batch, and the sampling observation qualification rate should be not less than 95%; Otherwise this sleeve is answered one by one inspection, can use after qualified.
Further, the examination of branch sleeve comprises that also adopting logical feeler gauge and detent plug to advise to the sampling test specimen carries out an acceptance inspection in the said step 2, and said logical feeler gauge can screw in smoothly, and detent plug rule screw-in length is no more than 3P, is up to the standards.
The screw-down torque of bar splice is the important assurance of strength of joint and deformation performance; When joint screw-down torque value reached the standard-required value, screw thread fit clearance each other disappeared, and could satisfy the intensity and the deformation requirements of joint; The performance of the excessive too small all butt joints of screw-down torque is unfavorable; So the operation of checking with torque spanner in the said step 2 is when the reinforcing bar of different-diameter connects, to different screw-down torque values should be arranged.
Further, the operation of checking with torque spanner in the said step 2, when the diameter of connecting reinforcement was 36-40mm, corresponding screw-down torque value was 360Nm.
The present invention compared with prior art; Its beneficial effect is: rolling bar straight screw sleeve connection construction method of the present invention, advantage such as this method has the strength of joint height, connection speed is fast, equipment is simple to operate, stable and reliable for performance, applied widely, easy construction, joint are cheap; The bar splice reliability that forms through this method simultaneously is high, Stability Analysis of Structures, and each phase performance indications all can reach the requirement of tecnical regulations, is particularly suitable for the large batch of major diameter reinforcing bar of some significant points and connects.
Description of drawings
Fig. 1 is the process flow chart of step 1 according to the invention.
Fig. 2 is the process flow chart of step 2 according to the invention.
The specific embodiment
Be elaborated in the face of technical scheme of the present invention down, but protection scope of the present invention is not limited to said embodiment.
A kind of rolling bar straight screw sleeve connection construction method comprises the steps:
The processing of step 1, reinforced bar straight thread joint; As shown in Figure 1, comprise following operation:
(1) check of the march into the arena installation and the raw material of reinforcement rebar of reinforcing bar ripping rib and rolling depressing rib machine; Take " decide the people and decide machine, special messenger be responsible for " system, the accredited machine of going up of reinforcing bar ripping rib and rolling depressing rib machine operating personnel, the support staff forbids start, and raw material of reinforcement rebar must have product certificate, and mutatis mutandis card is rechecked and can be used after qualified;
(2) carry out steel bar blanking according to charger sheet, at first should the red line sign be used in the steel bar stretching straightening in the cut place, cut reinforcing bar with cutting machine then, the otch end face should with the reinforcing bar axis normal, with fine grinding wheel polishing reinforcing bar end face, make its smooth at last; Can make things convenient for steel bar end stripping rib roll forming mantle fiber through above-mentioned technology, the positional precision of raising silk mouth and the quality of silk mouth are convenient to the connection of sleeve, thereby are improved the mechanical property that whole reinforcing bar connects.
(3) with reinforcing bar ripping rib and rolling depressing rib machine steel bar end is carried out the roll forming mantle fiber,
At first steel bar end is immersed in the water-soluble lubricating liquid and soaked 1-2 minute, make the termination be stained with sliding agent, be convenient to follow-up rib line and eliminate, reduce its temperature.
Then reinforcing bar is eliminated through the reinforcing bar ripping rib and rolling depressing rib machine rib line that it is surperficial of adjusting direct and length in advance,
Take out reinforcing bar, once more it immersed in the water-soluble lubricating liquid and soaked 2-5 minute, make its cooling and lubricated surface, once more steel bar end is inserted reinforcing bar ripping rib and rolling depressing rib machine and carry out the roll extrusion mantle fiber,
Use the sand papering termination at last, make silk mouthful bright and clean, smooth, and with coarse plain emery wheel with the port hacking;
To shell rib and the roll extrusion mantle fiber is operated respectively, further improve the quality of silk mouthful, increase the reliability of joint.
The length of strict control silk mouth in the process, a silk mouthful diameter surely closes with sleeve silk mouth diameter mutually, guarantees the quality of joint;
(4) self check of a silk quality; At first carry out the presentation quality inspection; The snaggletooth number of end reinforced screw thread should be greater than 3 teeth; Should be in the every circumference of screw thread part defects in teeth greater than 1/4 week; Detect silk head length degree with calliper then, detect a silk diameter, qualified silk head is filled in detection record carry out the location colour-marking line with ring gauge; In splice, screw on plastic protective sleeve or straight thread connecting sleeve, the nose heave new processing of underproof silk;
(5) silk quality sampling observation, through the qualified reinforcing wire head of self check, to its minute lot number inspect 10% at random by random samples; And be no less than 10, use the specialized barrel verification, defective if any a silk; Promptly to this processing batch exhaustive test, defective silk head should be processed through using after the assay was approved once more again;
(6) termination test specimen mechanical property test, the mechanical property field test of termination is undertaken by checking and accepting to criticize, and same execution conditions adopt ad eundem, same pattern, the same specification joint of same material down; Is one with 500 and checks and accepts batch that also checking and accepting as of 500 of less thaies batch calculated, when continuous 10 of scene is checked and accepted batch; Through electronic tension tester it being carried out tensile strength, elongation rate and yield strength detects; When whole test specimens once are when qualified, to check and accept batch joint quantity and can expand as 1500, each of butt joint is checked and accepted batch; Should randomly draw 3 test specimens and do the simple tension strength test; Its performance indications must all reach A level joint performance requirement among " reinforcing steel bar machinery connects the current techique rules " JGJ107-96, and are undesirable if any a test specimen tensile strength, should randomly draw 6 test specimens again and review; As still having a test specimen tensile strength undesirable, this is checked and accepted batch is defective;
Step 2, connecting reinforcement joint, as shown in Figure 2, comprise following operation:
(1) examination of branch sleeve; Sleeve must have product certificate and onsite acceptance qualified; The examination of sleeve should be tested by DBJ/CT005-2002 5.1.7 bar regulation; Sleeve is answered non-corroding; Defectives such as crackle; Should there be pollutions such as greasy dirt on the screw thread; The sleeve visual examination is checked and accepted as one with 500 joints and is criticized; Every batch by 10% sampling observation; The sampling observation qualification rate should be not less than 95%; Otherwise this sleeve is answered one by one inspection, and adopts logical feeler gauge and detent plug rule to carry out an acceptance inspection to the sampling test specimen, and said logical feeler gauge can screw in smoothly; Detent plug rule screw-in length is no more than 3P, is up to the standards;
(2) protective cap on assembling reinforcement, the recovery reinforcing bar to be connected is transported to structure with reinforcing bar to be connected and uses the position emplace, guarantees that the silk mouth stands intact, and protective cap is taken off be put in the fixing collection box;
(3) reinforcing bar is connected through branch sleeve; At first steel bar end is smeared one deck wheel lubricating oil,
End with branch sleeve is installed on the termination of reinforcing bar then; With the work spanner it is tightened to colour-marking line; Again another steel bar end is screwed into the branch sleeve other end and tightens to colour-marking line; During operation; With work spanner revoling tube or reinforcing bar, the silk head is held out against at the sleeve pipe middle position, accomplish connection; The socket end limit should be dropped on the leader colo(u)r streak, and must not have the above complete silk mouth of two buttons to expose;
Check with torque spanner that (4) on the joint that connects, carry out the paint sign, expression has connected completion;
(5) mechanical property of bar splice test specimen experiment; Under the same execution conditions; Adopting ad eundem, same pattern, the same specification joint of same material, is that an inspection lot is tested and checked and accepted with 300 of continuous productions, also the calculating by an inspection lot of 300 of less thaies; To each inspection lot joint; Must be in the engineering structures of Hot work in progress at random 3 joint test specimens of intercepting make tensile strength and compression test, the result of reinforcing bar jointing field trial should meet the pertinent regulations among existing industry standard " reinforcing steel bar machinery the connects the current techique rules " JGJ107-2003.
(6) the antirust processing of bar splice is smeared one deck waterproof agent with the two ends of sleeve and the contact position of reinforcing bar, makes the water in the concrete can't get into joint inside, guarantees the mechanical property and the durability of joint;
(7) the parcel layer of steel wire net in the outside of bar splice; The reinforcing bar packages length at this gauze wire cloth and sleeve two ends is respectively 10-15cm; Joint is fully contacted with concrete, bring into play the mechanical property of joint more fully, increase the stability of joint.
The screw-down torque of bar splice is the important assurance of strength of joint and deformation performance; When joint screw-down torque value reached the standard-required value, screw thread fit clearance each other disappeared, and could satisfy the intensity and the deformation requirements of joint; The performance of the excessive too small all butt joints of screw-down torque is unfavorable; So the operation of checking with torque spanner in the said step 2 is when the reinforcing bar of different-diameter connects, to different screw-down torque values should be arranged; When the diameter of connecting reinforcement was 36-40mm, corresponding screw-down torque value was 360Nm.
As stated, although represented and explained the present invention that with reference to specific preferred embodiment it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the accompanying claims definition, can make various variations in form with on the details to it.
Claims (5)
1. a rolling bar straight screw sleeve connection construction method is characterized in that, comprises the steps: the processing of step 1, reinforced bar straight thread joint; Comprise following operation:
(1-1) reinforcing bar ripping rib and rolling depressing rib machine is marched into the arena and is installed and the raw material of reinforcement rebar check;
(1-2) carry out steel bar blanking according to charger sheet; At first should the red line sign be used in the steel bar stretching straightening in the cut place, cut reinforcing bar with cutting machine then, the otch end face should with the reinforcing bar axis normal, with fine grinding wheel polishing reinforcing bar end face, make its smooth at last;
(1-3) steel bar end is carried out the roll forming mantle fiber with reinforcing bar ripping rib and rolling depressing rib machine,
At first steel bar end is immersed in the water-soluble lubricating liquid and soaked 1-2 minute,
Then the rib line of the reinforcing bar ripping rib and rolling depressing rib machine of reinforcing bar through adjusting diameter and length in advance with its cross cut end (of a beam) eliminated,
Take out reinforcing bar, once more it immersed in the water-soluble lubricating liquid and soaked 2-5 minute, make its cooling and lubricated surface, once more steel bar end is inserted reinforcing bar ripping rib and rolling depressing rib machine and carry out the roll extrusion mantle fiber,
Use the sand papering termination at last, make silk mouthful bright and clean, smooth, and with coarse plain emery wheel with the port hacking;
The length of strict control silk mouth in the process, a silk mouthful diameter surely closes with sleeve silk mouth diameter mutually;
(1-4) self check of a silk quality; At first carry out the presentation quality inspection; The snaggletooth number of end reinforced screw thread must be less than 3 teeth; Must be in the every circumference of screw thread part defects in teeth less than 1/4 week; Detect silk head length degree with calliper then, detect a silk diameter, qualified silk head is filled in detection record carry out the location colour-marking line with ring gauge; In splice, screw on plastic protective sleeve or straight thread connecting sleeve, the nose heave new processing of underproof silk;
(1-5) sampling observation of a silk quality, to its minute lot number inspect 10% at random by random samples, and be no less than 10, use the specialized barrel verification, defective if any a silk, promptly to this processing batch exhaustive test, defective silk should be processed through using after the assay was approved once more again;
(1-6) termination test specimen mechanical property test, the mechanical property field test of termination is undertaken by checking and accepting to criticize, and same execution conditions adopt ad eundem, same pattern, the same specification joint of same material down; Is one with 500 and checks and accepts batch that also checking and accepting as of 500 of less thaies batch calculated, when continuous 10 of scene is checked and accepted batch; Through electronic tension tester it being carried out tensile strength, elongation rate and yield strength detects; When whole test specimens once are when qualified, to check and accept batch joint quantity and can expand as 1500, each of butt joint is checked and accepted batch; Should randomly draw 3 test specimens and do the simple tension strength test; Its performance indications must all reach A level joint performance requirement among " reinforcing steel bar machinery connects the current techique rules " JGJ107-96, and are undesirable if any a test specimen tensile strength, should randomly draw 6 test specimens again and review; As still having a test specimen tensile strength undesirable, this is checked and accepted batch is defective;
Step 2, connecting reinforcement joint; Comprise following operation:
(2-1) examination of branch sleeve;
(2-2) protective cap on assembling reinforcement, the recovery reinforcing bar to be connected;
(2-3) reinforcing bar is connected through branch sleeve; At first steel bar end is smeared one deck lubrication oil,
End with branch sleeve is installed on the termination of reinforcing bar then; With the work spanner it is tightened to colour-marking line; Again another steel bar end is screwed into the branch sleeve other end and tightens to colour-marking line; During operation; With work spanner revoling tube or reinforcing bar, the silk head is held out against at the sleeve pipe middle position, accomplish connection; The socket end limit should be dropped on the leader colo(u)r streak, and must not have the above complete silk mouth of two buttons to expose;
Check with torque spanner that (2-4) on the joint that connects, carry out the paint sign, the expression inspected is accomplished;
(2-5) mechanical property of bar splice test specimen experiment; Under the same execution conditions; Adopting ad eundem, same pattern, the same specification joint of same material, is that an inspection lot is tested and checked and accepted with 300 of continuous productions, also the calculating by an inspection lot of 300 of less thaies; To each inspection lot joint; Must be in the engineering structures of Hot work in progress at random 3 joint test specimens of intercepting make tensile strength and compression test, the result of reinforcing bar jointing field trial should meet the pertinent regulations among existing industry standard " reinforcing steel bar machinery the connects the current techique rules " JGJ107-2003;
(2-6) the antirust processing of bar splice is smeared one deck waterproof agent with the two ends of sleeve and the contact position of reinforcing bar, makes the water in the concrete can't get into joint inside;
(2-7) the parcel layer of steel wire net in the outside of bar splice, the reinforcing bar packages length at this gauze wire cloth and sleeve two ends is respectively 10-15cm.
2. rolling bar straight screw sleeve connection construction method according to claim 1 is characterized in that, the examination of branch sleeve should be tested by DBJ/CT005-2002 5.1.7 bar regulation in the said step 2; Sleeve is answered non-corroding, crack defect, should not have oil pollution on the screw thread, and the sleeve visual inspection is checked and accepted as one with 500 joints and criticized; Every batch by 10% sampling observation; The sampling observation qualification rate should be not less than 95%, otherwise this sleeve is answered one by one inspection, can use after qualified.
3. rolling bar straight screw sleeve connection construction method according to claim 2; It is characterized in that; The examination of branch sleeve comprises that also adopting logical feeler gauge and detent plug to advise to the sampling test specimen carries out an acceptance inspection in the said step 2; Said logical feeler gauge can screw in smoothly, and detent plug rule screw-in length is no more than 3P, is up to the standards.
4. rolling bar straight screw sleeve connection construction method according to claim 1 is characterized in that, the operation of checking with torque spanner in the said step 2 is when the reinforcing bar of different-diameter connects, to different screw-down torque values should be arranged.
5. rolling bar straight screw sleeve connection construction method according to claim 4 is characterized in that, the operation of checking with torque spanner in the said step 2, and when the diameter of connecting reinforcement was 36-40mm, corresponding screw-down torque value was 360Nm.
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| CN 201210121195 CN102653989B (en) | 2012-04-24 | 2012-04-24 | Steel bar rolling straight-thread sleeve connection construction method |
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| CN 201210121195 CN102653989B (en) | 2012-04-24 | 2012-04-24 | Steel bar rolling straight-thread sleeve connection construction method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109057340A (en) * | 2018-09-10 | 2018-12-21 | 中国建筑第二工程局有限公司 | Building construction site is appurtenance for brick in advance |
| CN109433832A (en) * | 2018-10-25 | 2019-03-08 | 盐城市联鑫钢铁有限公司 | It solves screw-thread steel screw thread during mantle fiber and the process of gap problem occurs |
| CN110992600A (en) * | 2019-12-06 | 2020-04-10 | 万翼科技有限公司 | Building material dispensing and receiving method and related equipment |
| CN112845997A (en) * | 2020-12-29 | 2021-05-28 | 天门天晟新型材料科技有限公司 | Bending processing technology for anti-theft net guardrail |
| CN113216522A (en) * | 2021-05-17 | 2021-08-06 | 吉林建筑大学设计研究院有限责任公司 | Steel bar connecting sleeve and steel bar connecting method |
| CN114043250A (en) * | 2022-01-07 | 2022-02-15 | 中建八局第二建设有限公司 | Integrated steel bar mechanical connection machining operation platform and operation method |
| CN115110700A (en) * | 2022-06-30 | 2022-09-27 | 中铁二十局集团第一工程有限公司 | Main rib threaded mechanical connection structure |
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| EP0552424A1 (en) * | 1992-01-24 | 1993-07-28 | Erico International Corporation | High dynamic strength reinforcing bar splice and method of making |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057340A (en) * | 2018-09-10 | 2018-12-21 | 中国建筑第二工程局有限公司 | Building construction site is appurtenance for brick in advance |
| CN109057340B (en) * | 2018-09-10 | 2023-11-24 | 中国建筑第二工程局有限公司 | Building site is appurtenance for prewetting brick |
| CN109433832A (en) * | 2018-10-25 | 2019-03-08 | 盐城市联鑫钢铁有限公司 | It solves screw-thread steel screw thread during mantle fiber and the process of gap problem occurs |
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| CN112845997A (en) * | 2020-12-29 | 2021-05-28 | 天门天晟新型材料科技有限公司 | Bending processing technology for anti-theft net guardrail |
| CN113216522A (en) * | 2021-05-17 | 2021-08-06 | 吉林建筑大学设计研究院有限责任公司 | Steel bar connecting sleeve and steel bar connecting method |
| CN114043250A (en) * | 2022-01-07 | 2022-02-15 | 中建八局第二建设有限公司 | Integrated steel bar mechanical connection machining operation platform and operation method |
| CN115110700A (en) * | 2022-06-30 | 2022-09-27 | 中铁二十局集团第一工程有限公司 | Main rib threaded mechanical connection structure |
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| CN102653989B (en) | 2013-05-15 |
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