CN105716771A - Detection device and detection method for anchoring force of tensioning anchorage system - Google Patents
Detection device and detection method for anchoring force of tensioning anchorage system Download PDFInfo
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- CN105716771A CN105716771A CN201610254557.7A CN201610254557A CN105716771A CN 105716771 A CN105716771 A CN 105716771A CN 201610254557 A CN201610254557 A CN 201610254557A CN 105716771 A CN105716771 A CN 105716771A
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- force
- supporting device
- anchor
- oil cylinder
- force supporting
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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
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Piles And Underground Anchors (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a detection device and a detection method for an anchoring force of a tensioning anchorage system. The detection device comprises a first counter force supporting device, a second counter force supporting device, a force measuring oil cylinder and a connecting bolt, wherein the first counter force supporting device and the second counter force supporting device are respectively of a hollow tubular structure, and the first counter force supporting device is connected with one end of the second counter force supporting device by virtue of a screw thread; and the force measuring oil cylinder is connected with the other end of the second counter force supporting device by virtue of a connecting bolt, so that the first counter force supporting device, the second counter force supporting device and the force measuring oil cylinder are coaxial. The detection device is used for carrying out anchoring force detection on the tensioning anchorage system which is completed in tensioning construction and not grouted, detection objectivity and accuracy can be improved, an anchoring state of an anchorage system is avoided from being disturbed by tension test, the anchoring force of the tensioning anchorage system can be scientifically detected, and the tensioning construction of the anchorage system can be scientifically managed, so that potential quality hazard of the anchorage system can be conveniently timely found, and remedial measures such as tension compensation can be timely implemented.
Description
Technical field
The present invention relates to the anchor force detection technique field of tensioned anchorage system, particularly relate to detecting device and the detection method of a kind of tensioned anchorage system anchor force.
Background technology
Tensioned anchorage system is widely used in large-span prestressed reinforced concrete structure, the suspension rod system of arch bridge, cable-stayed bridge and suspension bridge, and the prestressed anchor cable system etc. of the high slope of Geotechnical Engineering and underground chamber.Adopt tensioning rollering fastening system can play the advantage that steel tensile strength is high, improve loading capacity of engineering, however it is necessary that the anchor force applied by anchor structure thing or Geotechnical Engineering is met relevant design and code requirement, the stability of guarantee works or Geotechnical Engineering and safety by the strict tensioned anchorage system that controls.
The quality control on construction point of tensioned anchorage system specifically includes that the presstressed reinforcing steel (anchor cable etc.) of tensioning rollering fastening system installs the line type control in duct, the installation qualities such as the presstressed reinforcing steel (anchor cable etc.) of anchoring system, ground tackle, stretch-draw and anchoring and the protection at slip casting and anchor head position in duct is carried out according to designing requirement.Wherein whether stretching construction puts in place, and whether anchoring system installation quality is reliable, all can affect the final anchor force size of anchor system, thus affecting bearing capacity and the stability of works, determines the service life of engineering.
The anchor force measuring technology of tensioned anchorage system widely used in current engineering mainly has two classes: the first kind, Dynamic Non-Destruction Measurement based on frequency method, being mainly used in the anchor force test of the external tendon such as suspension cable, suspension rod, the method is bigger for tackline and steel strand wires rope test error；Equations of The Second Kind, based on the measuring technology of test stretch-draw (reverse drawing), tensioning system and test system are connected by the method, are currently used primarily in armored concrete post-tensioned prestressing anchor system, method of testing simple, intuitive.But counter-force is supported on ground tackle, in test stretching process, the anchoring status of disturbance anchoring system, affects efficiency of anchorage and fatigue behaviour.
Summary of the invention
The purpose of the present invention: detecting device and the detection method of a kind of tensioned anchorage system anchor force are provided, the construction quality of tensioned anchorage system is assessed by detecting the anchor force of anchor system, in time the tensioned anchorage system that there is mass defect is applied remedial measure, improve the integral construction quality level of works and the Geotechnical Engineering using tensioned anchorage system.
To achieve these goals, the technical scheme is that
The detecting device of a kind of tensioned anchorage system anchor force, including the first anti-force supporting device, the second anti-force supporting device, dynamometry oil cylinder and connecting bolt；The first described anti-force supporting device and the second anti-force supporting device are one end of hollow cylindrical configuration, the first described anti-force supporting device and the described second anti-force supporting device and are threaded connection；Described dynamometry oil cylinder is connected by described connecting bolt with the other end of the described second anti-force supporting device, makes the anti-force supporting device of described first, the second anti-force supporting device and dynamometry oil cylinder be centrally located on same axis；Being provided with elongation test device on described dynamometry oil cylinder and external data analyzes system, described dynamometry oil cylinder connects oil pump, and the top of described dynamometry oil cylinder is provided with moveable anchor or cord clip tool.
The detecting device of above-mentioned tensioned anchorage system anchor force, wherein, the first described anti-force supporting device is provided with instrument connection, is positioned at the support end of the anti-force supporting device of described first.
The detecting device of above-mentioned tensioned anchorage system anchor force, wherein, is provided with limiting plate between the first described anti-force supporting device and the described second anti-force supporting device, and described limiting plate is vertically arranged.
The method that the detecting device of a kind of tensioned anchorage system anchor force is installed on anchor system, the method at least comprises the steps:
Step 1: the first anti-force supporting device of the ground tackle correspondingly-sized of selection and anchor system, the limiting plate of dimension is also selected for intermediate plate ground tackle, then strengthen installing within the scope of district the first anti-force supporting device and limiting plate in anchoring, and connect the second anti-force supporting device.
Step 2: connecting the second anti-force supporting device and dynamometry oil cylinder, and install elongation test device on dynamometry oil cylinder, dynamometry oil cylinder connects oil pump.
Step 3: at top installation tool anchor or the cord clip tool of dynamometry oil cylinder.
Step 4: dynamometry oil cylinder and elongation are tested device and connects data analysis system.
The detection method of the detecting device of a kind of tensioned anchorage system anchor force, the method at least comprises the steps:
Step 1: the data analysis system original construction data of stretching force-elongation according to anchor system, matching obtains stretching force-elongation construction curve, obtains controlling construction curve slope during stretching force；Or utilize presstressed reinforcing steel tensile strength test data to obtain construction curve slope.
Step 2: carry out test stretch-draw, be slowly further applied load, tests elongation and the stretching force of device and dynamometry oil cylinder test anchor system by elongation.
Step 3: data analysis system real-time fitting stretching force-elongation test curve, when this test curve slope is obviously reduced, and when slope and construction curve slope are basically identical, preliminary judge that stretching force is close to anchor system anchor force, keep the stretching force of dynamometry oil cylinder, carry out second test judgement.
Step 4: by the instrument connection of the first anti-force supporting device, whether space occurring between test anchor system and its supporting surface, if there is space, then now stretching force is the test value of anchor system anchor force；Otherwise continuing Slow loading continuance test, until there is space between anchor system and its supporting surface, now stretching force is the test value of anchor system anchor force.
The present invention, to being complete stretching construction but the tensioned anchorage system of not yet slip casting carries out anchor force detection, can improve objectivity and the precision of detection, avoid the anchoring status of test stretch-draw disturbance anchoring system simultaneously；The anchor force of tensioned anchorage system can be carried out science detection by the present invention, it is achieved anchor system stretching construction is carried out scientific management, in order to find the hidden danger of quality of anchor system in time, implements to compensate the remedial measures such as stretch-draw.
Accompanying drawing explanation
Fig. 1 is the structural representation of the detecting device of a kind of tensioned anchorage system anchor force of the present invention.
Fig. 2 is the data analysis schematic diagram of the detecting device of a kind of tensioned anchorage system anchor force of the present invention.
Fig. 3 is the installation method flow chart of the detecting device of a kind of tensioned anchorage system anchor force of the present invention.
Fig. 4 is the detection method flow chart of the detecting device of a kind of tensioned anchorage system anchor force of the present invention.
Detailed description of the invention
Embodiments of the invention are further illustrated below in conjunction with accompanying drawing.
Referring to shown in accompanying drawing 1 and accompanying drawing 2, the detecting device of a kind of tensioned anchorage system anchor force, including first anti-force supporting device the 1, second anti-force supporting device 2, dynamometry oil cylinder 3 and connecting bolt 4；The first described anti-force supporting device 1 and the second anti-force supporting device 2 are hollow cylindrical configuration, and the first described anti-force supporting device 1 is connected by screw thread or other modes with one end of the described second anti-force supporting device 2；Described dynamometry oil cylinder 3 is connected by described connecting bolt 4 or other modes with the other end of the described second anti-force supporting device 2, make the anti-force supporting device of described first 1, second anti-force supporting device 2 and dynamometry oil cylinder 3 be centrally located on same axis, it is to avoid dynamometry oil cylinder 3 eccentric compression and cause test error；Being provided with elongation test device on described dynamometry oil cylinder 3 and external data analyzes system, described dynamometry oil cylinder 3 connects oil pump, and the top of described dynamometry oil cylinder 3 is provided with moveable anchor or cord clip tool etc..
The first described anti-force supporting device 1 is provided with instrument connection, is positioned at the support end of the anti-force supporting device 1 of described first, is used for testing between anchor system and supporting surface and whether space occurs.First anti-force supporting device 1 carries out segment design in the size of support end according to typical case's ground tackle size.
Being provided with limiting plate 5 between the first described anti-force supporting device 1 and the described second anti-force supporting device 2, described limiting plate 5 is vertically arranged, and is used for installing intermediate plate ground tackle.
Referring to shown in accompanying drawing 3, the method that the detecting device of a kind of tensioned anchorage system anchor force is installed on anchor system, the method at least comprises the steps:
Step 1: the first anti-force supporting device 1 of the ground tackle correspondingly-sized of selection and anchor system, the limiting plate 5 of dimension is also selected for intermediate plate ground tackle, then strengthen installing within the scope of district the first anti-force supporting device 1 and limiting plate 5 in anchoring, and connect the second anti-force supporting device 2.
Step 2: connecting the second anti-force supporting device 2 and dynamometry oil cylinder 3, and install elongation test device on dynamometry oil cylinder 3, dynamometry oil cylinder 3 connects oil pump.
Step 3: at the top installation tool anchor or cord clip tool etc. of dynamometry oil cylinder 3.
Step 4: dynamometry oil cylinder 3 and elongation are tested device and connects data analysis system.
Referring to shown in accompanying drawing 4, the detection method of the detecting device of a kind of tensioned anchorage system anchor force, the method at least comprises the steps:
Step 1: the data analysis system original construction data of stretching force-elongation according to anchor system, matching obtains stretching force-elongation construction curve, obtains controlling the construction curve slope k 1 during stretching force.Or utilize presstressed reinforcing steel tensile strength test data to obtain construction curve slope k 1.
Step 2: carry out test stretch-draw, be slowly further applied load, tests elongation and the stretching force of anchor system by elongation test device and dynamometry oil cylinder 3.
Step 3: data analysis system real-time fitting stretching force-elongation test curve, when this test curve slope is obviously reduced, and when slope and construction curve slope k 1 are basically identical, preliminary judge that stretching force is close to anchor system anchor force, keep the stretching force of dynamometry oil cylinder 3, carry out second test judgement.
Step 4: by the instrument connection of the first anti-force supporting device 1, whether space occurring between test anchor system and its supporting surface, if there is space, then now stretching force is the test value of anchor system anchor force；Otherwise continuing Slow loading continuance test, until there is space between anchor system and its supporting surface, now stretching force is the test value of anchor system anchor force.
When the detecting device of the present invention and detection method are not carry out duct slip casting for tensioned anchorage system after stretching construction completes, detect its anchor force.The principle of this detection technique is by the anchor system of not yet slip casting after anchoring is carried out test stretch-draw, and the stretching force-elongation curve slope according to test stretch-draw changes, and between anchoring system and supporting surface, occur space to judge whether stretching force reaches anchor force, obtain anchor force measured value.
The anchor force detecting device of the present invention and detection method may be used for structure post-tensioned prestressing system, the anchor force detection of the anchor systems such as the prestressed anchor cable system of Geotechnical Engineering and underground engineering and cable-stayed bridge, suspension bridge and arch bridge suspender.
In sum, the present invention, to being complete stretching construction but the tensioned anchorage system of not yet slip casting carries out anchor force detection, can improve objectivity and the precision of detection, avoid the anchoring status of test stretch-draw disturbance anchoring system simultaneously；The anchor force of tensioned anchorage system can be carried out science detection by the present invention, it is achieved anchor system stretching construction is carried out scientific management, in order to find the hidden danger of quality of anchor system in time, implements to compensate the remedial measures such as stretch-draw.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention to make; or directly or indirectly use the technical field being attached to other Related products, all in like manner include in the scope of patent protection of the present invention.
Claims (5)
1. the detecting device of a tensioned anchorage system anchor force, it is characterised in that: include the first anti-force supporting device, the second anti-force supporting device, dynamometry oil cylinder and connecting bolt；The first described anti-force supporting device and the second anti-force supporting device are one end of hollow cylindrical configuration, the first described anti-force supporting device and the described second anti-force supporting device and are threaded connection；Described dynamometry oil cylinder is connected by described connecting bolt with the other end of the described second anti-force supporting device, makes the anti-force supporting device of described first, the second anti-force supporting device and dynamometry oil cylinder be centrally located on same axis；Being provided with elongation test device on described dynamometry oil cylinder and external data analyzes system, described dynamometry oil cylinder connects oil pump, and the top of described dynamometry oil cylinder is provided with moveable anchor or cord clip tool.
2. the detecting device of tensioned anchorage system anchor force according to claim 1, it is characterised in that: the first described anti-force supporting device is provided with instrument connection, is positioned at the support end of the anti-force supporting device of described first.
3. the detecting device of tensioned anchorage system anchor force according to claim 1, it is characterised in that: being provided with limiting plate between the first described anti-force supporting device and the described second anti-force supporting device, described limiting plate is vertically arranged.
4. the method that the detecting device of the tensioned anchorage system anchor force that a kind is applied to described in claim 1-3 any one is installed on anchor system, it is characterised in that: the method at least comprises the steps:
Step 1: the first anti-force supporting device of the ground tackle correspondingly-sized of selection and anchor system, the limiting plate of dimension is also selected for intermediate plate ground tackle, then strengthen installing within the scope of district the first anti-force supporting device and limiting plate in anchoring, and connect the second anti-force supporting device；
Step 2: connecting the second anti-force supporting device and dynamometry oil cylinder, and install elongation test device on dynamometry oil cylinder, dynamometry oil cylinder connects oil pump；
Step 3: at top installation tool anchor or the cord clip tool of dynamometry oil cylinder；
Step 4: dynamometry oil cylinder and elongation are tested device and connects data analysis system.
5. the detection method of the detecting device of the tensioned anchorage system anchor force that a kind is applied to described in claim 4, it is characterised in that: the method at least comprises the steps:
Step 1: the data analysis system original construction data of stretching force-elongation according to anchor system, matching obtains stretching force-elongation construction curve, obtains controlling construction curve slope during stretching force；Or utilize presstressed reinforcing steel tensile strength test data to obtain construction curve slope；
Step 2: carry out test stretch-draw, be slowly further applied load, tests elongation and the stretching force of device and dynamometry oil cylinder test anchor system by elongation；
Step 3: data analysis system real-time fitting stretching force-elongation test curve, when this test curve slope is obviously reduced, and when slope is consistent with construction curve slope, tentatively judge that stretching force is close to anchor system anchor force, keep the stretching force of dynamometry oil cylinder, carry out second test judgement；
Step 4: by the instrument connection of the first anti-force supporting device, whether space occurring between test anchor system and its supporting surface, if there is space, then now stretching force is the test value of anchor system anchor force；Otherwise continuing Slow loading continuance test, until there is space between anchor system and its supporting surface, now stretching force is the test value of anchor system anchor force.
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| CN201610254557.7A CN105716771B (en) | 2016-04-24 | 2016-04-24 | A kind of detection device and detection method of tensioned anchorage system anchor force |
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| CN201610254557.7A CN105716771B (en) | 2016-04-24 | 2016-04-24 | A kind of detection device and detection method of tensioned anchorage system anchor force |
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2016
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| US6318038B1 (en) * | 1997-12-31 | 2001-11-20 | Jae Man Park | Apparatus for retensing pre-stress structure |
| US20040035216A1 (en) * | 2002-08-26 | 2004-02-26 | Morrison Denby Grey | Apparatuses and methods for monitoring stress in steel catenary risers |
| CN201057518Y (en) * | 2006-05-12 | 2008-05-07 | 王继成 | Synthetic testing bench for pre-stressed anchorage and connector |
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Inventor after: Chao Chunfeng Inventor after: Luo Lanqiang Inventor after: Chen Longmei Inventor after: Ji Wenhong Inventor after: Yang Chao Inventor before: Chao Chunfeng Inventor before: Chen Longmei Inventor before: Ji Wenhong Inventor before: Yang Chao |