CN111119414A - Semi-grouting type steel bar connecting joint with built-in force transducer and manufacturing method thereof - Google Patents
Semi-grouting type steel bar connecting joint with built-in force transducer and manufacturing method thereof Download PDFInfo
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- CN111119414A CN111119414A CN201911421927.1A CN201911421927A CN111119414A CN 111119414 A CN111119414 A CN 111119414A CN 201911421927 A CN201911421927 A CN 201911421927A CN 111119414 A CN111119414 A CN 111119414A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 103
- 239000010959 steel Substances 0.000 title claims abstract description 103
- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 239000011440 grout Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052451 lead zirconate titanate Inorganic materials 0.000 claims description 6
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- MNKMDLVKGZBOEW-UHFFFAOYSA-M lithium;3,4,5-trihydroxybenzoate Chemical compound [Li+].OC1=CC(C([O-])=O)=CC(O)=C1O MNKMDLVKGZBOEW-UHFFFAOYSA-M 0.000 claims description 5
- ZBSCCQXBYNSKPV-UHFFFAOYSA-N oxolead;oxomagnesium;2,4,5-trioxa-1$l^{5},3$l^{5}-diniobabicyclo[1.1.1]pentane 1,3-dioxide Chemical compound [Mg]=O.[Pb]=O.[Pb]=O.[Pb]=O.O1[Nb]2(=O)O[Nb]1(=O)O2 ZBSCCQXBYNSKPV-UHFFFAOYSA-N 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910002113 barium titanate Inorganic materials 0.000 claims description 4
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 claims description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A semi-grouting type steel bar connecting joint with a built-in force transducer comprises a semi-grouting sleeve, a force transducer, sleeve grouting materials, end covers and ribbed steel bars I and II to be connected; the force sensor consists of a base provided with a piezoelectric element, an upper cover, a lower cover and a sensor lead, wherein the force sensor is connected with the internal thread of a polygonal cylinder through the base and is arranged in a semi-grouting sleeve, the lower cover of the force sensor is flush with the top of a cylindrical inner cavity of the cylinder, the sensor lead is led out from a grout outlet and is connected with an external data acquisition device, and a ribbed steel bar I with an external thread at the end part is connected with the internal thread of the polygonal cylinder and props against the upper cover of the force sensor; and the other ribbed steel bar II penetrates through the end cover and is inserted into the inner cavity of the sleeve from the other side of the sleeve, and the cylindrical inner cavity is filled with grouting material for the sleeve. The semi-grouting type steel bar connection joint with the built-in force transducer can monitor grouting quality in the grouting construction process, and can monitor the stress condition of the whole steel bar joint in the structure using process.
Description
Technical Field
The invention relates to an assembly type concrete structure accessory, in particular to a steel bar connecting joint applied to an assembly type concrete structure, and particularly relates to a semi-grouting type steel bar connecting joint with a built-in force transducer and a manufacturing method thereof.
Background
In recent years, the prefabricated concrete structure has the advantages of environmental friendliness, short construction period, standardized production, reliable quality and the like, and is widely popularized by the nation, the most mainstream steel bar connection mode is grouting sleeve connection, wherein a half grouting sleeve steel bar joint is favored by a plurality of owners because the sleeve length is shorter than that of a full grouting sleeve and the price is lower; even if the prefabricated end reinforcing steel bars are mechanically connected, the assembly end reinforcing steel bars are inserted into the sleeves, ultrahigh-strength, micro-expansion and self-leveling sleeve grouting materials are filled between the reinforcing steel bars and the sleeve connecting pieces, and the sleeve grouting materials are hardened to form a reinforcing steel bar joint, so that the reinforcing steel bar connecting technology is applied to multi-place building and bridge engineering on a large scale; among them, the patent of utility model with patent publication No. CN203475703U and invention name "a semi-grouting type steel bar connection joint" is one of them, but because of the lack of effective monitoring means for joint grouting quality and joint stress condition in solid structure, the construction quality control problem caused by this is concerned by all parties.
Disclosure of Invention
The invention aims to: the semi-grouting type steel bar connecting joint with the built-in force transducer and the manufacturing method thereof are provided to solve the problem that the existing semi-grouting sleeve steel bar joint cannot monitor the stress and the grouting quality of the steel bar joint.
The technical scheme for solving the problems is as follows: a semi-grouting type steel bar connecting joint with a built-in force transducer comprises a semi-grouting sleeve, a sleeve grouting material, an end cover, a ribbed steel bar I to be connected and a ribbed steel bar II to be connected; one end of the semi-grouting sleeve is a cylinder with a cylindrical inner cavity, circular-ring-shaped convex ribs and grooves are continuously distributed in the cylindrical inner cavity of the cylinder at intervals, two bosses are arranged on the side face of the cylinder, one boss I is close to an orifice of the end face of the sleeve, the other boss II is close to the bottom of the cylindrical inner cavity, an internal thread through hole is formed in the middle of each boss and penetrates through the wall of the cylindrical inner cavity of the sleeve, the internal thread through holes of the two bosses are respectively used as a grout outlet and a grout inlet, and a grout outlet pipe and a grout pipe are respectively connected to the internal thread; the sleeve other end is that structure size is less, the appearance is polygonal polygon cylinder, and this polygon cylinder center is equipped with through-hole and internal thread: the method is characterized in that: the force sensor comprises a base provided with a piezoelectric element, an upper cover, a lower cover and a sensor lead;
the force sensor is connected with the internal thread of the polygonal column body through a base with external threads and is arranged in the semi-grouting sleeve, the lower cover of the force sensor is flush with the top of the cylindrical inner cavity of the cylinder body, a sensor lead is led out from a grout outlet and is connected with an external data acquisition device, and a ribbed steel bar I with external threads at the end part is connected with the internal thread of the polygonal column body and props against the upper cover of the force sensor; and the other ribbed steel bar II penetrates through the end cover and is inserted into the inner cavity of the sleeve from the other side of the sleeve, and the cylindrical inner cavity is filled with grouting material for the sleeve.
The further technical scheme of the semi-grouting type steel bar connecting joint with the built-in force transducer is as follows: the piezoelectric element of the force transducer is any one of a piezoelectric crystal plate, a barium titanate plate, a lithium gallate plate, a lithium germanate plate, a titanium germanate plate, a lead zirconate titanate plate, a lead magnesium niobate zirconate titanate plate, a lead niobate zincate titanate plate or a PVDF plate.
The bottom of the cylindrical inner cavity of the semi-grouting sleeve is provided with a circular convex rib or a slope.
The semi-grouting sleeve is cast by high-strength ductile cast iron.
The end cover is a circular ring sheet, the diameter of an inner hole of the circular ring is equal to the nominal diameter of the steel bar to be connected, and the circular ring sheet is made of one of rubber, iron, aluminum, steel or alloy steel.
Another related technical scheme is as follows: the invention discloses a method for manufacturing a semi-grouting type steel bar connection joint with a built-in force transducer, which is a method for manufacturing and installing the semi-grouting type steel bar connection joint with the built-in force transducer, and comprises the following steps:
A. prefabricating a semi-grouting type sleeve with a built-in force transducer:
a1, manufacturing a semi-grouting sleeve:
one end of the semi-grouting sleeve is a cylinder with a cylindrical inner cavity, circular-ring-shaped convex ribs and grooves are continuously distributed in the cylindrical inner cavity of the cylinder at intervals, two bosses are arranged on the side surface of the cylinder of the sleeve, one boss I is close to an orifice of the end surface of the sleeve, the other boss II is close to the bottom of the cylindrical inner cavity, an internal thread through hole penetrates through the wall of the cylindrical inner cavity of the sleeve is arranged in the middle of each boss, the internal thread through holes of the two bosses are respectively used as a grout outlet and a grout inlet, and a grout outlet pipe and a grout pipe are respectively connected onto the internal; the other end of the semi-grouting sleeve is a polygonal cylinder with smaller structural size and polygonal appearance, and a through hole and internal threads are arranged at the center of the polygonal cylinder;
a2, mounting a force sensor:
the force sensor comprises a base provided with a piezoelectric element, an upper cover, a lower cover and a sensor lead, wherein the force sensor is connected and arranged in a semi-grouting type sleeve through the base provided with an external thread and an internal thread of a polygonal cylinder, so that the lower cover of the force sensor is flush with the top of a cylindrical inner cavity of the cylinder, the sensor lead is led out from a grout outlet pipe and is connected with an external data acquisition device, and thus the grouting pressure applied to the top of the inner cavity of the sleeve and the tensile and compressive stress applied to a steel bar joint in the later period are monitored;
B. installing the ribbed steel bars to be connected:
b1, pre-installing a ribbed steel bar I to be connected at one end of the sleeve:
connecting a ribbed steel bar I with an external thread at the end part with an internal thread of a polygonal column of the semi-grouting sleeve, and propping against an upper cover of the force transducer;
b2, installing a ribbed steel bar II to be connected:
when the steel bar II is embedded into the prefabricated component to be assembled, the prefabricated component extends out of one section of the end face of the component, and the length of the extension is slightly equal to the axial length of the cylinder of the inner cavity of the semi-grouting sleeve;
C. connecting the ribbed steel bars to be connected and grouting:
c1, inserting the ribbed steel bar II into the inner cavity of the sleeve by penetrating through the end cover at the other side of the sleeve;
and C2, pouring sleeve grouting material into the cylindrical inner cavity from the grouting opening until the sleeve grouting material overflows from the grout outlet, and after the grouting material is hardened, forming a semi-grouting type steel bar connecting joint with a built-in force transducer by the ribbed steel bar I, the ribbed steel bar II, the force transducer and the semi-grouting sleeve.
The manufacturing method of the semi-grouting type steel bar connecting joint with the built-in force transducer comprises the following further technical scheme: in the step of manufacturing the semi-grouting type sleeve A1, the bottom of the cylindrical inner cavity of the semi-grouting sleeve is provided with a circular ring-shaped convex rib or a slope.
At A1, a semi-grouting sleeve is manufactured, wherein the semi-grouting sleeve is cast by high-strength ductile cast iron.
In the step of manufacturing the semi-grouting type sleeve A1, the piezoelectric element of the force sensor is any one of a piezoelectric crystal plate, a lithium gallate sheet, a lithium germanate sheet, a titanium germanate sheet, a lead zirconate titanate sheet, a lead magnesium niobate zirconate titanate sheet, a lead zinc niobate titanate sheet or a PVDF sheet.
In the step of manufacturing the semi-grouting type sleeve A1, the end cover is a circular ring sheet, the diameter of an inner hole of the circular ring is equal to the nominal diameter of the steel bar to be connected, and the circular ring sheet is made of one of rubber, iron, aluminum, steel or alloy steel.
By adopting the technical scheme, the semi-grouting type steel bar connecting joint with the built-in force transducer and the manufacturing method thereof have the following beneficial effects:
the semi-grouting type steel bar connecting joint with the built-in force transducer can monitor grouting quality in the grouting construction process, and can monitor the stress condition of the whole steel bar joint in the structure using process.
The invention relates to a semi-grouting type steel bar connection joint with a built-in force sensor, which comprises a force sensor 3, wherein the force sensor 3 comprises a base 31 provided with a piezoelectric element 35, an upper cover 32, a lower cover 33 and a sensor lead 34, the force sensor 3 is connected with an internal thread 22 of a polygonal column body 2a through the base 31 provided with an external thread and is arranged at the top of a cylindrical inner cavity of a cylinder 2b with the lower cover 33 flush, the sensor lead 34 is led out from a grout outlet 231 and is connected with an external data acquisition device 7, because the piezoelectric sensor is rigidly connected with a sleeve in the semi-grouting type steel bar connection joint, the upper cover and the lower cover are respectively contacted with a steel bar and a grouting material, the grouting quality can be monitored in grouting construction, and the stress condition of the whole steel bar joint can be monitored in the structural use process.
The piezoelectric sensor adopted in the semi-grouting type steel bar connecting joint has the advantages of simple structure, reliable work, high signal-to-noise ratio, high sensitivity, high signal-to-bandwidth and the like, and is connected with the sleeve through threads, convenient to install and high in operability.
And thirdly, the semi-grouting sleeve in the semi-grouting type steel bar connecting joint is cast by high-strength nodular cast iron, the structural design and casting of the sleeve can be carried out according to the stress analysis of the joint and the requirement of installing a sensor, and the structure is reasonable and reliable.
The technical features of a semi-grouting type reinforcement bar coupler with a built-in load cell and a method for manufacturing the same according to the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of an overall structure of a semi-grouting type steel bar connection joint with a built-in load cell according to an embodiment of the present invention;
fig. 2-3 are schematic structural diagrams of a half-grouting sleeve of a half-grouting type rebar connecting joint with a built-in load cell according to an embodiment of the invention:
FIG. 2: front sectional view, fig. 3: FIG. 2 is a top view (with piezoelectric elements and sensor leads removed);
fig. 4 is a schematic view of an overall structure of a semi-grouting type rebar junction with a built-in load cell according to a second embodiment of the invention.
1-ribbed steel bar I, 2-half grouting sleeve, 2 a-polygonal column, 2 b-cylinder 2 b;
21-through hole, 22-internal thread, 23-boss I, 231-grout outlet, 232-grout outlet pipe, 24-boss II, 241-grout inlet, 242-grout pipe, 25-circular-ring-shaped convex rib and 26-groove;
3-a force sensor, 31-a base, 32-an upper cover, 33-a lower cover, 34-a sensor lead and 35-a piezoelectric element;
4-sleeve grouting material, 5-end cover, 6-ribbed steel bar II, 7-external data acquisition device.
Detailed Description
The first embodiment is as follows:
a built-in force cell's half grout formula steel bar attach fitting I:
as shown in fig. 1-3, the semi-grouting type steel bar connection joint with the built-in force-measuring sensor comprises a semi-grouting sleeve 2, sleeve grouting material 4, an end cover 5, and a ribbed steel bar i 1 and a ribbed steel bar ii 6 to be connected;
as shown in fig. 2-3, one end of the semi-grouting sleeve 2 is a cylinder 2b with a cylindrical inner cavity, the cylindrical inner cavity of the cylinder 2b is internally provided with annular ribs 25 and grooves 26 which are continuously distributed at intervals, the side surface of the cylinder 2b is provided with two bosses, one boss i 23 is close to the orifice of the end surface of the sleeve, the other boss ii 24 is close to the bottom of the cylindrical inner cavity, the middle part of each boss is respectively provided with an internal thread through hole which penetrates through the wall of the cylindrical inner cavity of the sleeve, the internal thread through holes of the two bosses are respectively used as a grout outlet 231 and a grout inlet 241, and a grout outlet 232 and a grout pipe 242 are respectively connected thereon; the other end of the sleeve is a polygonal column body 2a with smaller structural size and polygonal appearance, a through hole 21 and internal threads 22 are arranged in the center of the polygonal column body 2a, and an annular convex rib 271 is arranged at the bottom of the cylindrical inner cavity of the sleeve;
the force measuring sensor 3 comprises a base 31 provided with a piezoelectric crystal piece 35, an upper cover 32, a lower cover 33 and a sensor lead 34, the force measuring sensor 3 is connected with the internal thread 22 of the polygonal column body 2a through the base 31 provided with external threads and is arranged at the top of the cylindrical inner cavity of the lower cover 33 in parallel with the internal thread 22 of the polygonal column body 2b, the sensor lead 34 is led out from a grout outlet 231 and is connected with an external data acquisition device 7 so as to monitor grouting pressure applied to the top of the inner cavity of the sleeve and tensile and compressive stress applied to a steel bar joint in the later period, and a ribbed steel bar I1 provided with external threads at the end part is connected with the internal thread 22 of the polygonal column body 2a and props against; and another ribbed steel bar II 6 passes through the end cover 5 and is inserted into the inner cavity of the sleeve from the other side of the sleeve, and the cylindrical inner cavity is filled with grouting material 4 for the sleeve.
Example two:
a built-in force cell's half grout formula steel bar attach fitting II:
as shown in fig. 4, the basic structure of the semi-grouting type rebar junction connector ii with a built-in load cell is the same as that of the first embodiment, except that the bottom structure of the cylinder 2b with the cylindrical inner cavity of the semi-grouting sleeve 2 is different, and in the first embodiment, the bottom of the cylindrical inner cavity of the semi-grouting sleeve 2 is a slope 272; next, the piezoelectric element 35 is a PVDF sheet in this embodiment, unlike the piezoelectric element used.
EXAMPLE III
A manufacturing method of a semi-grouting type steel bar connecting joint with a built-in force transducer comprises the following steps:
the manufacturing and mounting method of the semi-grouting type steel bar connection joint with the built-in force transducer comprises the following steps:
A. prefabricating a semi-grouting type sleeve with a built-in force transducer:
a1, manufacturing a half grouting type sleeve 2:
one end of the semi-grouting sleeve 2 is a cylinder 2b with a cylindrical inner cavity, circular ring-shaped convex ribs 25 and grooves 26 are continuously distributed at intervals in the cylindrical inner cavity of the cylinder 2b, the other end of the sleeve is a polygonal cylinder 2a with a smaller structural size and a polygonal appearance, a through hole 21 and internal threads 22 are arranged in the center of the polygonal cylinder 2a, two bosses are arranged on the side surface of the sleeve cylinder 2b, one boss I23 is close to an orifice of the end surface of the sleeve, the other boss II 24 is close to the bottom of the cylindrical inner cavity, an internal thread through hole penetrates through the wall of the cylindrical inner cavity of the sleeve is respectively arranged in the middle of each boss, the internal thread through holes of the two bosses are respectively used as a grout outlet 231 and a grout inlet 241, and a grout outlet 232 and; the bottom of the cylindrical inner cavity of the sleeve is provided with an annular rib 271 or a slope 272 (see fig. 2 and 4);
a2, mounting the load cell 3:
the force sensor 3 comprises a base 31, a piezoelectric element 35, a lower cover 33 and a sensor lead 34, wherein the force sensor 3 is connected and installed in a semi-grouting type sleeve through the base 31 with an external thread and an internal thread 22 of a polygonal cylinder 2a, so that the lower cover 33 of the force sensor 3 is flush with the top of a cylindrical inner cavity of the cylinder 2b, and the sensor lead 34 is led out from a grout outlet pipe 232 and connected with an external data acquisition device 7, so that grouting pressure applied to the top of the inner cavity of the sleeve and tensile and compressive stress applied to a steel bar joint in the later period can be monitored;
B. installing the ribbed steel bars to be connected:
b1, pre-installing the ribbed steel bar I1 to be connected at one end of the sleeve:
connecting a ribbed steel bar I1 with an external thread at the end part with an internal thread 22 of a polygonal column body 2a of a semi-grouting sleeve 2, and propping against an upper cover 32 of a force-measuring sensor 3;
b2, installing the ribbed steel bar II 6 to be connected:
when the steel bar II 6 is embedded into the prefabricated component to be assembled, the prefabricated component extends out of one section of the end face of the component, and the length of the extension is slightly equal to the axial length of the cylinder 2b in the inner cavity of the semi-grouting sleeve 2;
C. connecting the ribbed steel bars to be connected and grouting:
c1, inserting the ribbed steel bar II 6 into the inner cavity of the sleeve by penetrating the end cover 5 at the other side of the sleeve;
c2, pouring sleeve grouting material 4 into the cylindrical inner cavity from the grouting opening 24 until the sleeve grouting material 4 overflows from the grout outlet 23, and after the grouting material 4 is hardened, forming a semi-grouting type steel bar connecting joint with a built-in force transducer by the ribbed steel bar I1, the ribbed steel bar II 6, the force transducer 3 and the semi-grouting sleeve 2.
In the step of manufacturing the half-grouting type sleeve 2 at a1, the half-grouting type sleeve 2 is cast by high-strength ductile cast iron.
In the step of manufacturing the semi-grouting type sleeve 2 at A1, the end cover 5 is a circular ring sheet, the diameter of an inner hole of the circular ring is equal to the nominal diameter of the steel bar to be connected, and the circular ring sheet is made of one of rubber, iron, aluminum, steel or alloy steel.
In the embodiments of the present invention, the half-grouting sleeve 2 is cast from high-strength ductile iron.
The piezoelectric element 35 of the force sensor 3 is any one of a piezoelectric quartz plate, a barium titanate plate, a lithium gallate plate, a lithium germanate plate, a titanium germanate plate, a lead zirconate titanate plate, a lead magnesium niobate zirconate titanate plate, a lead niobate zincate titanate plate, or a PVDF plate.
The end cover 5 is a circular ring sheet, the diameter of an inner hole of the circular ring is equal to the nominal diameter of the steel bar to be connected, and the circular ring sheet is made of one of rubber, iron, aluminum, steel or alloy steel.
Claims (10)
1. A semi-grouting type steel bar connecting joint with a built-in force transducer comprises a semi-grouting sleeve (2), sleeve grouting materials (4), an end cover (5), a ribbed steel bar I (1) and a ribbed steel bar II (6) to be connected; one end of the semi-grouting sleeve (2) is a cylinder (2 b) with a cylindrical inner cavity, circular-ring-shaped convex ribs (25) and grooves (26) are continuously distributed at intervals in the cylindrical inner cavity of the cylinder (2 b), two bosses are arranged on the side surface of the cylinder (2 b), one boss I (23) is close to an orifice of the end surface of the sleeve, the other boss II (24) is close to the bottom of the cylindrical inner cavity, an internal thread through hole is formed in the middle of each boss and penetrates through the wall of the cylindrical inner cavity of the sleeve, the internal thread through holes of the two bosses are respectively used as a grout outlet (231) and a grout inlet (241), and a grout outlet pipe (232) and a grout pipe (242) are respectively connected onto; the other end of the sleeve is a polygonal column body (2 a) with smaller structural size and polygonal appearance, and a through hole (21) and an internal thread (22) are arranged in the center of the polygonal column body (2 a); the method is characterized in that: the force-measuring sensor (3) comprises a base (31) provided with a piezoelectric element (35), an upper cover (32), a lower cover (33) and a sensor lead (34);
a force measuring sensor (3) is connected with an internal thread (22) of a polygonal column body (2 a) through a base (31) with an external thread and is installed in a semi-grouting sleeve (2), a lower cover (33) of the force measuring sensor is flush with the top of a cylindrical inner cavity of a cylinder body (2 b), a sensor lead (34) is led out from a grout outlet (23) and is connected with an external data acquisition device (7), a ribbed steel bar I (1) with an external thread at the end part is connected with the internal thread (22) of the polygonal column body (2 a) and props against an upper cover (32) of the force measuring sensor (3); and another ribbed steel bar II (6) penetrates through the end cover (5) and is inserted into the inner cavity of the sleeve from the other side of the sleeve, and the cylindrical inner cavity is filled with grouting material (4) for the sleeve.
2. The semi-grouted rebar junction connector with a built-in load cell according to claim 1, wherein: the piezoelectric element (35) of the force measuring sensor (3) is any one of a piezoelectric crystal plate, a barium titanate plate, a lithium gallate plate, a lithium germanate plate, a titanium germanate plate, a lead zirconate titanate plate, a lead magnesium niobate lead zirconate titanate plate, a lead zinc niobate lead titanate plate or a PVDF plate.
3. The semi-grouted rebar junction connector with a built-in load cell according to claim 1, wherein: the bottom of the cylindrical inner cavity of the semi-grouting sleeve (2) is provided with an annular convex rib (271) or a slope (272).
4. The semi-grouted rebar junction connector with a built-in load cell according to claim 1, wherein: the semi-grouting sleeve (2) is cast by high-strength ductile cast iron.
5. The semi-grouted rebar junction connector with a built-in load cell according to claim 1, wherein: the end cover (5) is a circular ring sheet, the diameter of an inner hole of the circular ring is equal to the nominal diameter of the steel bar to be connected, and the circular ring sheet is made of one of rubber, iron, aluminum, steel or alloy steel.
6. A manufacturing method of a semi-grouting type steel bar connecting joint with a built-in force transducer is characterized by comprising the following steps: the manufacturing and mounting method of the semi-grouting type steel bar connection joint with the built-in force transducer in the claim 1 comprises the following steps:
A. prefabricating a semi-grouting type sleeve with a built-in force transducer:
a1, manufacturing a half grouting sleeve (2):
one end of the semi-grouting sleeve (2) is a cylinder (2 b) with a cylindrical inner cavity, annular convex ribs (25) and grooves (26) are continuously distributed at intervals in the cylindrical inner cavity of the cylinder (2 b), two bosses are arranged on the side surface of the cylindrical sleeve (2 b), one boss I (23) is close to an orifice of the end surface of the sleeve, the other boss II (24) is close to the bottom of the cylindrical inner cavity, an internal thread through hole penetrates through the wall of the cylindrical inner cavity of the sleeve is respectively arranged in the middle of each boss, the internal thread through holes of the two bosses are respectively used as a grout outlet (231) and a grout inlet (241), and a grout outlet pipe (232) and a grout pipe (242) are respectively connected onto the internal thread through; the other end of the semi-grouting sleeve is a polygonal column body (2 a) with smaller structural size and polygonal appearance, and the center of the polygonal column body (2 a) is provided with a through hole (21) and an internal thread (22);
a2, mounting a load cell (3):
the force measuring sensor (3) comprises a base (31) provided with a piezoelectric element (35), an upper cover (32), a lower cover (33) and a sensor lead (34), wherein the force measuring sensor (3) is connected with an internal thread (22) of a polygonal cylinder (2 a) through the base (31) provided with an external thread and is arranged in a semi-grouting type sleeve, so that the lower cover (33) of the force measuring sensor (3) is flush with the top of a cylindrical inner cavity of the cylinder (2 b), and the sensor lead (34) is led out from a grout outlet pipe (232) and is connected with an external data acquisition device (7) to monitor grouting pressure applied to the top of the inner cavity of the sleeve and tensile and compressive stress applied to a later-stage steel bar joint;
B. installing the ribbed steel bars to be connected:
b1, pre-installing the ribbed steel bar I (1) to be connected at one end of the sleeve:
connecting a ribbed steel bar I (1) with an external thread at the end part with an internal thread (22) of a polygonal column body (2 a) of a semi-grouting sleeve (2), and propping against an upper cover (32) of a force measuring sensor (3);
b2, installing the ribbed steel bar II (6) to be connected:
when the steel bar II (6) is embedded into the prefabricated component to be assembled, the prefabricated component extends out of one section of the end face of the component, and the extending length is slightly equal to the axial length of the cylinder (2 b) in the inner cavity of the semi-grouting sleeve (2);
C. connecting the ribbed steel bars to be connected and grouting:
c1, inserting the ribbed steel bar II (6) into the inner cavity of the sleeve by penetrating the end cover (5) at the other side of the sleeve;
c2, pouring sleeve grouting material (4) into the cylindrical inner cavity from the grouting opening (24) until the sleeve grouting material (4) overflows from the grout outlet (23), and after the grouting material (4) is hardened, forming a semi-grouting type steel bar connecting joint with a built-in force sensor by the ribbed steel bar I (1), the ribbed steel bar II (6), the force sensor (3) and the semi-grouting sleeve (2).
7. The method for manufacturing the semi-grouting type steel bar connection joint with the built-in load cell according to claim 6, wherein the method comprises the following steps: in the step A1, manufacturing a semi-grouting sleeve (2), an annular rib (271) or a slope (272) is arranged at the bottom of a cylindrical inner cavity of the semi-grouting sleeve (2).
8. The method for manufacturing the semi-grouting type steel bar connection joint with the built-in load cell according to claim 6, wherein the method comprises the following steps: in the step A1, manufacturing a semi-grouting type sleeve (2), the semi-grouting type sleeve (2) is cast by high-strength ductile cast iron.
9. The method for manufacturing the semi-grouting type steel bar connection joint with the built-in load cell according to claim 6, wherein the method comprises the following steps: in the step A1, manufacturing the semi-grouting type sleeve (2), the piezoelectric element (35) of the force measuring sensor (3) is any one of a piezoelectric crystal plate, a barium titanate plate, a lithium gallate plate, a lithium germanate plate, a titanium germanate plate, a lead zirconate titanate plate, a lead magnesium niobate zirconate titanate plate, a lead niobate zincate titanate plate or a PVDF plate.
10. The method for manufacturing the semi-grouting type steel bar connection joint with the built-in load cell according to claim 6, wherein the method comprises the following steps: in the step A1 of manufacturing the semi-grouting type sleeve (2), the end cover (5) is a circular ring sheet, the diameter of an inner hole of the circular ring is equal to the nominal diameter of the steel bar to be connected, and the circular ring sheet is made of one of rubber, iron, aluminum, steel or alloy steel.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252592A (en) * | 2020-10-28 | 2021-01-22 | 长沙理工大学 | Grouting sleeve device with intelligent detection assembly |
| CN114001847A (en) * | 2021-12-07 | 2022-02-01 | 哈尔滨工业大学 | Self-monitoring method for stress of connection node of grouting sleeve for assembly structure |
| CN114753506A (en) * | 2021-01-12 | 2022-07-15 | 武汉源锦建材科技有限公司 | Grouting hexagonal corrugated pipe for steel bar anchoring connection |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206876633U (en) * | 2017-06-27 | 2018-01-12 | 浙江大学 | A kind of structure of the external vibration-testing method detection telescopic splice of grouting behind shaft or drift lining |
| CN108872548A (en) * | 2018-05-31 | 2018-11-23 | 宁波联城住工科技有限公司 | A kind of detection device and its detection method of detection grout sleeve grouting density |
| CN108918660A (en) * | 2018-05-19 | 2018-11-30 | 徐光大 | Nondestructive detection method for sleeve grouting fullness of steel bar sleeve grouting connection joint |
| KR20190073314A (en) * | 2019-06-07 | 2019-06-26 | 팔미금속공업주식회사 | Sleeve for joining steel bars |
| CN209066730U (en) * | 2018-09-21 | 2019-07-05 | 广东联城住工装备信息科技有限公司 | Grout sleeve |
| CN212248904U (en) * | 2019-12-31 | 2020-12-29 | 柳州欧维姆结构检测技术有限公司 | Built-in force cell's half grout formula steel bar connection connects |
-
2019
- 2019-12-31 CN CN201911421927.1A patent/CN111119414A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206876633U (en) * | 2017-06-27 | 2018-01-12 | 浙江大学 | A kind of structure of the external vibration-testing method detection telescopic splice of grouting behind shaft or drift lining |
| CN108918660A (en) * | 2018-05-19 | 2018-11-30 | 徐光大 | Nondestructive detection method for sleeve grouting fullness of steel bar sleeve grouting connection joint |
| CN108872548A (en) * | 2018-05-31 | 2018-11-23 | 宁波联城住工科技有限公司 | A kind of detection device and its detection method of detection grout sleeve grouting density |
| CN209066730U (en) * | 2018-09-21 | 2019-07-05 | 广东联城住工装备信息科技有限公司 | Grout sleeve |
| KR20190073314A (en) * | 2019-06-07 | 2019-06-26 | 팔미금속공업주식회사 | Sleeve for joining steel bars |
| CN212248904U (en) * | 2019-12-31 | 2020-12-29 | 柳州欧维姆结构检测技术有限公司 | Built-in force cell's half grout formula steel bar connection connects |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252592A (en) * | 2020-10-28 | 2021-01-22 | 长沙理工大学 | Grouting sleeve device with intelligent detection assembly |
| CN114753506A (en) * | 2021-01-12 | 2022-07-15 | 武汉源锦建材科技有限公司 | Grouting hexagonal corrugated pipe for steel bar anchoring connection |
| CN114001847A (en) * | 2021-12-07 | 2022-02-01 | 哈尔滨工业大学 | Self-monitoring method for stress of connection node of grouting sleeve for assembly structure |
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