CN117109789A - Equipment integrating residual internal force detection and tension compensation and application method - Google Patents
Equipment integrating residual internal force detection and tension compensation and application method Download PDFInfo
- Publication number
- CN117109789A CN117109789A CN202311066551.3A CN202311066551A CN117109789A CN 117109789 A CN117109789 A CN 117109789A CN 202311066551 A CN202311066551 A CN 202311066551A CN 117109789 A CN117109789 A CN 117109789A
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- China
- Prior art keywords
- existing
- pull rod
- internal force
- adjusting sleeve
- connecting piece
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims 2
- 238000004873 anchoring Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Abstract
The invention provides equipment integrating residual internal force detection and tensioning, which comprises two symmetrical connecting rods, wherein two ends of each connecting rod are connected with connecting pieces, each connecting rod is provided with a check control device, one side of each check control device is provided with a through jack, the middle parts of each connecting piece are provided with an existing pull rod or a pull rope, each existing pull rod or pull rope is provided with an existing adjusting sleeve, two ends of each existing adjusting sleeve are provided with separated anchoring devices, four groups of strain gauges are distributed on each existing pull rod or pull rope, two groups of strain gauges are arranged outside the connecting pieces, two groups of strain gauges are arranged inside the connecting pieces, and the four groups of strain gauges are connected to a digital display through data lines. The invention provides a method for detecting the residual internal force of the existing prestressed pull rod or the existing stay cable and simultaneously compensating the existing pull rod or the existing stay cable which does not meet the requirement of the detection result in time.
Description
Technical Field
The invention belongs to the technical field of prestress detection and tensioning, and particularly relates to equipment integrating residual internal force detection and tensioning and a using method thereof.
Background
The existing prestress pull rod or inhaul cable is widely used for projects such as large-span buildings, bridges, wharfs and the like, an existing adjusting sleeve with positive and negative threads is generally arranged, and two ends of the existing adjusting sleeve are connected with lug ring cable heads. Over time, existing prestressed tension rods or cables may experience stress losses, loosening of existing adjustment sleeves, corrosion of structural joints, and the like. Therefore, the internal force of the existing prestress pull rod or the existing prestress pull rope is detected for a certain period, and whether the existing prestress pull rod or the existing prestress pull rope is required to be subjected to tensioning is determined according to a detection result. The detection methods commonly used at present mainly comprise the following methods: pressure sensor method, vibration frequency detection method, three-point bending detection method, and strain method. Although the pressure sensor method has high accuracy and reliability, the anchor head of the end part needs to be modified, and the construction period is not allowed in practical construction. Other methods are all indirect detection methods, and are greatly influenced by environmental factors. The internal force of the existing prestress pull rod or inhaul cable is obtained through calculation according to a formula, the intuitionistic effect is not achieved, and the accuracy and reliability of the internal force cannot be guaranteed.
The method can only be used for detecting the existing prestress pull rod or pull rope, namely, after the internal force of the pull rod or the pull rope is detected to be insufficient, the pull rod or the pull rope with insufficient internal force is required to be subjected to tensioning by tensioning equipment. Therefore, two working procedures are needed to complete the reinforcement measures of the existing prestressed pull rod or the existing guy cable, which is time-consuming and uneconomical.
The equipment system can also be independently used for stretching the existing prestressed pull rod or the stay rope.
Disclosure of Invention
The invention aims to: aiming at the prior art, a device integrating residual internal force detection and tension compensation and a use method thereof are provided;
the technical scheme is as follows: the utility model provides a collect remaining internal force and detect and mend equipment as an organic whole that opens, includes two symmetrical connecting rods, the both ends of connecting rod all are connected with the connecting piece, two all be equipped with non return controlling means on the connecting rod, two non return controlling means's one side all is equipped with the heart-shaped jack, heart-shaped jack contact non return controlling means, two the middle part of connecting piece is existing pull rod or cable, be equipped with existing adjusting sleeve on existing pull rod or the cable, existing adjusting sleeve's both ends all are equipped with disconnect-type ground tackle, be distributed with four groups of strain gauge on existing pull rod or the cable, wherein two sets of are located the outside of connecting piece, two sets of are located the inside of connecting piece, four sets of strain gauge all are connected to digital display appearance through the data line.
Preferably, the check control device comprises a frame body, and a check nut is further connected to the connecting rod and the inside of the frame body.
Preferably, the connecting piece comprises two L-shaped steel plates which are vertically symmetrical, the two L-shaped steel plates are connected through bolts, the two L-shaped steel plates are also connected with fixed steel plates, the two L-shaped steel plates are connected through bolts through the fixed steel plates, and a plurality of stiffening plates are welded on one sides of the two L-shaped steel plates which are vertically symmetrical.
Preferably, the split type anchorage comprises two connecting blocks, the two connecting blocks are connected in a meshed mode to form a hollow part, and the existing pull rod or the existing stay rope penetrates through the hollow part.
The method for using the device comprises the following steps,
A. existing pull rod or cable internal force detects:
a1 A) of: assembling equipment: two L-shaped steel plates which are vertically symmetrical are placed on an existing pull rod or a pull rope, a connecting piece is formed through bolt connection, two connecting rods are inserted into two sides of the connecting piece, a separation type anchorage device is installed on two sides of an existing adjusting sleeve, a check nut, a frame body and a penetrating jack are screwed in sequence on the connecting rods, an oil pump is installed on one side of the penetrating jack, a pressure gauge is connected to the output end of the oil pump in series, four groups of strain gauges are stuck on the existing pull rod or the pull rope, and the four groups of strain gauges are connected to a data display instrument through data wires;
a2 A) of: firstly, a chain wrench is used for rotating an existing adjusting sleeve, and if the existing adjusting sleeve is loosened, the existing adjusting sleeve directly enters a tensioning stage; if the existing pull rod or the existing pull rope cannot be loosened, the internal force of the existing pull rod or the existing pull rope is detected firstly;
a3 A) of: the oil pump is used for loading the through jack, after each loading is completed, the check nut is screwed, then the existing adjusting sleeve is loosened by the chain wrench, and meanwhile, test data of two groups of strain gauges arranged inside the connecting piece are read and recorded; repeatedly loading until the existing adjusting sleeve is loosened, reading a pressure gauge reading and test data which are connected in series with the through jack, wherein the pressure gauge reading is the internal force of the existing pull rod or the inhaul cable, and verifying the accuracy of the internal force by combining the test data;
a4 A) of: rotating the existing adjusting sleeve by using a chain wrench to enable the existing adjusting sleeve to be in a completely loosened state, wherein the internal force of the existing pull rod or the stay rope is zero; then, grading unloading is carried out on the penetrating jack until the reading of the pressure gauge is zero;
B. existing pull rod or stay cable internal force compensation tension:
b1 A) of: according to the test data of the step A3), loading the through jack by using an oil pump, screwing a check nut after each loading is completed, and loosening the existing adjusting sleeve by using a chain wrench to make the test data zero; repeating loading until the existing pull rod or the existing pull rope is tensioned to 1.2 times of the tensioning prestress required by the design; verifying the accuracy of the internal force of the patch by combining the test data;
b2 The existing adjusting sleeve is screwed up by a chain spanner, then the punching type jack is unloaded until the reading of the pressure gauge is zero, then test data are read, and the tensioning prestress 1.2 times of the design requirement of the existing pull rod or the inhaul cable is met.
The beneficial effects are that: in order to efficiently and accurately detect and supplement the internal force of the existing prestressed pull rod or the existing stay rope, a method capable of detecting the existing prestressed pull rod or the existing stay rope and timely supplementing the pull rod or the existing stay rope with the detection result not meeting the requirement is provided. The device can be used for both new and existing structures. The device can intuitively reflect the internal force of the pull rod or the inhaul cable, and the precision and the reliability of the result can be ensured. In the implementation process, the method is basically not limited by the external environment; meanwhile, the construction period and the manufacturing cost can be saved.
Drawings
FIG. 1 is a schematic view of the overall three-dimensional structure of the apparatus provided by the present invention;
FIG. 2 is a schematic view of the overall planar structure of the apparatus provided by the present invention;
FIG. 3 is a schematic view of the construction of the split anchor provided by the present invention;
fig. 4 is a schematic structural view of a connector provided by the present invention.
In the figure:
a connecting rod 1; a connecting piece 2; a check control device 3; a penetrating jack 4; existing tie rods or guys 5; existing adjustment sleeve 6; a split anchor 7; a connection block 71; a strain gage 8; a check nut 11; an "L" shaped steel plate 21; a fixed steel plate 22;
Detailed Description
The invention is further explained below with reference to the drawings.
The method for detecting and supplementing the internal force of the existing prestressed pull rod or inhaul cable by using the device comprises the following steps of:
the device is arranged on two sides of the existing adjusting sleeve in the pull rod or the inhaul cable.
1. And (3) special equipment installation:
mounting connecting piece-connecting rod-check control device-separated anchor, punching jack-pressure gauge-oil pump-sticking strain gauge-data display instrument
Note that: the strain gauge should be respectively stuck on the inner side and the outer side of the existing pull rod or the inhaul cable connecting piece.
2. In two stages: detecting the residual internal force of the pull rod or the pull rope, and supplementing the internal force of the pull rod or the pull rope;
the detection of the residual internal force of the existing pull rod or the stay rope comprises the following steps:
1) Firstly, a chain wrench is used for rotating an existing adjusting sleeve, and if the existing adjusting sleeve can be loosened, the existing adjusting sleeve directly enters a tensioning stage; if the existing prestress pull rod or the existing prestress pull cable cannot be loosened, the residual internal force of the existing prestress pull rod or the existing prestress pull cable is tested;
2) After the special equipment is correctly installed, the oil pump is used for carrying out graded loading on the punching jack, after each loading is completed, the check nut in the check control device is firstly screwed, then a chain spanner is used for trying to loosen the existing adjusting sleeve, and meanwhile, test data of strain gauges at two sides of the connecting piece are read and recorded; so far, the first-stage unloading of the internal force of the pull rod or the inhaul cable at the middle section of the connecting piece is completed; repeating the steps until the existing adjusting sleeve is loosened slowly. And reading final pressure gauge reading and strain test data, wherein the pressure gauge reading is the residual internal force of the pull rod or the inhaul cable, and the accuracy of the residual internal force is verified by combining the strain test data.
3) After the residual internal force of the existing pull rods or the stay ropes of the middle sections of the two connecting pieces in the first stage is unloaded, the existing adjusting sleeve is rotated, so that the existing adjusting sleeve is in a completely loose state, and the existing pull rods or the stay ropes of the middle sections of the two connecting pieces are in a state that the residual internal force is zero; then oil is slowly returned until the pressure gauge reading is zero.
The internal force compensation and tensioning implementation steps of the existing pull rod or the stay cable are as follows:
4) According to the detected data, supplementing the existing pull rod or the inhaul cable with stress relaxation; the oil pump is utilized to carry out graded loading on the punching jack, after each loading is completed, check nuts in the check control device are screwed, the existing adjusting sleeve is slowly rotated, and the testing data of the strain of the pull rod or the inhaul cable at the middle section of the two connecting pieces are zero; carrying out the second loading, and repeating the steps until the tension is 1.2 times of the tension prestress required by the design of the pull rod or the inhaul cable; and combining the measured test data to verify the accuracy of the internal tension of the patch.
5) After the grading stretching is completed, the existing adjusting sleeve is screwed up by a chain wrench; slowly returning oil to enable the reading of the pressure gauge to be zero; and then reading strain test data to measure the stress loss of the pull rod or the pull rope so as to ensure the tensioning prestress value meeting the design requirement of the pull rod or the pull rope.
6) Respectively disassembling: the data display instrument, the strain gauge, the oil pump, the pressure gauge, the punching jack, the check control device, the separated anchor, the connecting rod and the connecting piece.
The method is a complete whole process of detecting and supplementing the residual internal force of the pre-stress pull rod or the inhaul cable. The tensioning of the prestressed pull rod or the guy cable in the new construction can be directly implemented by referring to the tensioning part.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. The utility model provides a collect remaining internal force and detect and mend equipment as an organic whole of opening, its characterized in that includes connecting rod (1) of two symmetries, the both ends of connecting rod (1) all are connected with connecting piece (2), two all be equipped with check controlling means (3) on connecting rod (1), two one side of check controlling means (3) all is equipped with through type jack (4), through type jack (4) contact check controlling means (3), two the middle part of connecting piece (2) is existing pull rod or cable (5), be equipped with on existing pull rod or cable (5) existing adjusting sleeve (6), the both ends of existing adjusting sleeve (6) all are equipped with disconnect-type ground tackle (7), it has four sets of foil gage (8) to distribute on existing pull rod or cable (5), wherein two sets of outside of connecting piece (2) are located to two sets of inside of connecting piece (2), four sets of foil gage (8) all are connected to the digital display appearance through the data line.
2. The device integrating residual internal force detection and tensioning as claimed in claim 1, wherein the non-return control device (3) comprises a frame, and a non-return nut (11) is further connected to the connecting rod (1) inside the frame.
3. The device integrating residual internal force detection and tension compensation as claimed in claim 1, wherein the connecting piece (2) comprises two L-shaped steel plates (21) which are vertically symmetrical, the two L-shaped steel plates (21) are connected through bolts, a fixed steel plate (22) is further connected to the two L-shaped steel plates (21), the two L-shaped steel plates (21) are connected through bolts by the fixed steel plate (22), and a plurality of stiffening plates are welded on one sides of the two L-shaped steel plates (21) which are vertically symmetrical.
4. A device for detecting and repairing residual internal forces as claimed in claim 1, wherein said split anchorage (7) comprises two connection blocks (71), said two connection blocks (71) being connected in snap-fit to form a hollow through which said existing tie rod or cable (5) passes.
5. A method of using the device of any one of claims 1-4, comprising the steps of,
A. internal force detection of existing pull rod or pull rope:
a1 A) of: assembling equipment: two L-shaped steel plates which are vertically symmetrical are placed on an existing pull rod or a pull rope, a connecting piece is formed through bolt connection, two connecting rods are inserted into two sides of the connecting piece, a separation type anchorage device is installed on two sides of an existing adjusting sleeve, a check nut, a frame body and a penetrating jack are screwed in sequence on the connecting rods, an oil pump is installed on one side of the penetrating jack, a pressure gauge is connected to the output end of the oil pump in series, four groups of strain gauges are stuck on the existing pull rod or the pull rope, and the four groups of strain gauges are connected to a data display instrument through data wires;
a2 A) of: firstly, a chain wrench is used for rotating an existing adjusting sleeve, and if the existing adjusting sleeve is loosened, the existing adjusting sleeve directly enters a tensioning stage; if the existing pull rod or the existing pull rope cannot be loosened, the internal force of the existing pull rod or the existing pull rope is detected firstly;
a3 A) of: the oil pump is utilized to carry out graded loading on the penetrating jack, after each loading is completed, the check nut is screwed, then the existing adjusting sleeve is loosened by the chain wrench, and meanwhile, the test data of two groups of strain gauges arranged inside the connecting piece are read and recorded; repeatedly loading until the existing adjusting sleeve is loosened, reading a pressure gauge reading and test data which are connected in series with the through jack, wherein the pressure gauge reading is the internal force of the existing pull rod or the inhaul cable, and verifying the accuracy of the internal force by combining the test data;
a4 A) of: rotating the existing adjusting sleeve by using a chain wrench to enable the existing adjusting sleeve to be in a completely loosened state, wherein the internal force of the existing pull rod or the stay rope is zero; then, grading unloading is carried out on the penetrating jack until the reading of the pressure gauge is zero;
B. internal force compensation of existing pull rod or pull rope:
b1 A) of: according to the test data of the step A3), the oil pump is utilized to carry out graded loading on the punching jack, after each loading is completed, the check nut is screwed down, and then the existing adjusting sleeve is loosened by the chain spanner, so that the test data is zero; repeating loading until the existing pull rod or the existing pull rope is tensioned to 1.2 times of the tensioning prestress required by the design; verifying the accuracy of the internal force of the patch by combining the test data;
b2 The existing adjusting sleeve is screwed up by a chain spanner, then the punching type jack is subjected to grading unloading until the reading of the pressure gauge is zero, then test data are read, and the tensioning prestress 1.2 times of the design requirement of the existing pull rod or the inhaul cable is met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311066551.3A CN117109789A (en) | 2023-08-23 | 2023-08-23 | Equipment integrating residual internal force detection and tension compensation and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311066551.3A CN117109789A (en) | 2023-08-23 | 2023-08-23 | Equipment integrating residual internal force detection and tension compensation and application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117109789A true CN117109789A (en) | 2023-11-24 |
Family
ID=88797768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311066551.3A Pending CN117109789A (en) | 2023-08-23 | 2023-08-23 | Equipment integrating residual internal force detection and tension compensation and application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117109789A (en) |
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2023
- 2023-08-23 CN CN202311066551.3A patent/CN117109789A/en active Pending
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