CN111336929A - Measuring device is used in civil engineering construction - Google Patents
Measuring device is used in civil engineering construction Download PDFInfo
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- CN111336929A CN111336929A CN202010219480.6A CN202010219480A CN111336929A CN 111336929 A CN111336929 A CN 111336929A CN 202010219480 A CN202010219480 A CN 202010219480A CN 111336929 A CN111336929 A CN 111336929A
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- positioning
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- measuring device
- engineering construction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/02—Details
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- General Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a measuring device for civil engineering construction, and mainly relates to the field of civil engineering. The device comprises a positioning assembly and a measuring assembly, wherein clamping frames are arranged at the bottoms of the positioning assembly and the measuring assembly, and the clamping frames and the reinforcing steel bars are detachably fixed; the positioning assembly is a positioning plate which is vertically arranged, and a positioning line is arranged on the positioning plate; the measuring assembly is provided with a laser range finder which is used for positioning the positioning plate and obtaining the distance between the positioning plate and the positioning plate. The invention has the beneficial effects that: the method can avoid the problems that the difference of the pulling quantity of the steel bars is very large, some tension is insufficient, and some tension is excessive, and improve the construction quality of the reinforced concrete.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a measuring device for civil engineering construction.
Background
In the construction of civil engineering, it is essential that concrete is poured, and the prior art of pouring concrete with steel reinforcement requires calculation of prestress. Prestressed concrete is to compensate for the early occurrence of cracks in concrete, and before a member is used (loaded), a prestress is applied to the concrete in advance, namely, in a tension area of the concrete, a reinforcing steel bar is tensioned by a manual force method, and the tension area of the concrete is stressed in advance by utilizing the retraction force of the reinforcing steel bar. When the member is subjected to a tensile force generated by an external load, the stored prestressing force firstly counteracts the prestressing force in the concrete in the tension area, and then the concrete is tensioned along with the increase of the load, so that the elongation of the concrete is limited, and cracks are delayed or not caused to appear, and the prestressed concrete is called prestressed concrete.
The pre-stress is used for reducing or offsetting the tensile stress of the concrete caused by the load, so that the tensile stress of the structural member is controlled in a smaller range and even in a compressed state, the occurrence and development of concrete cracks are delayed, and the crack resistance and the rigidity of the member are improved. To achieve the pre-stress, the strands/bars are tensioned prior to the placement of the concrete. The prestressed tensioning member is enabled to bear compressive stress, and then the prestressed tensioning member is enabled to generate certain deformation to deal with the load of the structure, including the load of the self weight of the member, wind load, snow load and earthquake load. The tensioning method mainly comprises a pre-tensioning method and a post-tensioning method, wherein the pre-tensioning method is common, and the discussion and scheme design are mainly performed in sequence. The pre-tensioning method, as its name implies, is to tension the steel strands/bars first, then pour the concrete, and release the two ends of the steel strands/bars when the concrete reaches a specified strength.
If the prestress is not well tensioned, the condition that serious quality problems, economic losses and even serious safety problems of buildings occur due to the failure of the prestressed tendons easily occurs in use. At the time of a tensioning operation, the problem of inaccurate measurement of the tensioning length is common. The method is mainly characterized in that the elongation of each steel bar/steel strand needs to be accurately measured during tensioning, the length change is the only standard for judging whether the prestress is qualified, the tensioning elongation of the steel strands/steel bars can be calculated only by measuring the piston stroke of a tensioning jack in the conventional measuring method, and the retraction amount of an anchor plug in the whole tensioning process of the steel strands/steel bars needs to be reduced.
This method, although simple and straightforward, is very inaccurate and can only achieve values of approximately the desired elongation, but in a particular construction the fixing of each strand/bar is not exactly the same, and if there is no clamping of individual strands/bars, ineffective tensioning occurs, which cannot be found. And the ineffective tensioning of individual steel strand/reinforcing steel bar leads to the fact that workers stretch, anchor and finish rolling ant grain steel strand/reinforcing steel bar have randomness, and the condition that the vertical prestressed tendons lose efficacy or the tensioning force cannot meet the design requirements generally occurs.
Disclosure of Invention
The invention aims to provide a measuring device for civil engineering construction, which can avoid the problems of large difference of the pulling strength of reinforcing steel bars, insufficient tensioning in some cases and excessive tensioning in some cases, and improve the construction quality of reinforced concrete.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the device comprises a positioning assembly and a measuring assembly, wherein clamping frames are arranged at the bottoms of the positioning assembly and the measuring assembly, and the clamping frames and reinforcing steel bars are detachably fixed;
the positioning assembly is a positioning plate which is vertically arranged, and a positioning line is arranged on the positioning plate;
the measuring assembly is provided with a laser range finder which is used for positioning the positioning plate and obtaining the distance between the positioning plate and the positioning plate.
The positioning line comprises any one or a combination of a plurality of cross lines, annular target lines and grid lines.
The clamping frame comprises a mounting plate, and the mounting plate is a planar plate body and is used for fixedly mounting a positioning assembly or a measuring assembly;
be fixed with the flexure strip on the bottom surface of mounting panel, the flexure strip is V shape structure, and the bottom draws in, specifically includes fixed part and clamping part, the fixed part is the horizontal plate of fixing in the mounting panel bottom surface, the setting of clamping part symmetry is in the both sides of fixed part, the top side of clamping part and the both sides integrated into one piece of fixed part, the bottom side of clamping part gathers together along with downwardly extending, forms the V-arrangement that the clamping part bottom side closed together, has the elastic force that draws close each other in the bottom side of clamping part, the rotatable rubber post of installing of bottom side of clamping part, two the rubber post sets up side by side and global parallel closes together.
Concave-convex textures are arranged on the circumferential side wall of the rubber column.
The middle part of fixed part is equipped with rather than fixed connection's kicking block, the bottom surface of kicking block is the arcwall face, and is corresponding with the top side global that runs through the reinforcing bar between two clamping parts.
The measuring assembly comprises a fixed base, the fixed base is fixed on a mounting plate, a first hinged seat is arranged on one side of the fixed base, a swing arm is hinged on the first hinged seat, the swing arm is hinged with the first hinged seat and is fastened and limited through a first bolt, an anchor ear frame is arranged at the top end of the swing arm and is of a C type, an angle adjusting support in rotary fit with the inner ring of the anchor ear frame is arranged in the anchor ear frame, the anchor ear frame is locked with the angle adjusting support through a second screw rod, the outer end of the angle adjusting support is a shaft and rotates in the inner ring of the anchor ear frame, the angle adjusting support extends horizontally, a circular rotary groove is arranged on the top surface of one end, away from the anchor ear frame, of the angle adjusting support, a rotary disc in horizontal rotation is matched with the rotary groove in rotary fit, and the bottom of the rotary disc is inserted into the rotary groove and is, the laser range finder is characterized in that a third bolt used for locking the rotating disc is arranged on the side wall of the rotating groove, a circle of angle scales are arranged at the bottom of the rotating disc and used for calibrating a rotating angle, and the laser range finder is arranged on the rotating disc.
One end of the C-shaped opening of the hoop frame is provided with a threaded groove, the other end of the C-shaped opening of the hoop frame is provided with a sleeve, a second screw rod is matched in the sleeve in a rotating mode, the outer end of the second screw rod is exposed outside the sleeve and provided with a handle, and the inner end of the second screw rod penetrates out of the inner end of the sleeve and is in threaded connection with the threaded groove, so that the hoop frame is closed and tightened.
Compared with the prior art, the invention has the beneficial effects that:
the positioning assembly is arranged on the anchoring point at one end of the steel bar, and the measuring assembly is clamped on the anchoring point at the other end of the steel bar, so that the laser range finder of the measuring assembly is used for adjusting the angle to fix the positioning plate on the focusing positioning assembly. The method has the advantages that L is obtained by measuring once before tensioning, L 'is obtained by measuring once after tensioning, the actual numerical value of the stretching amount of the steel bars caused in the tensioning process can be obtained by subtracting the L' from the L 'by the L', the actual numerical value is directly obtained by measuring, and the problems that the stretching amount of the steel bars is very large, some steel bars are not stretched enough, and some steel bars are stretched excessively can be solved if each steel bar is measured.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a schematic structural view of the positioning plate of the invention.
Fig. 5 is a schematic structural view of the positioning plate of the invention.
Reference numerals shown in the drawings:
1. mounting a plate; 2. an elastic sheet; 3. a rubber column; 4. a top block; 5. positioning a plate; 6. a fixed base; 7. a swing arm; 8. a first bolt; 9. a hoop frame; 10. a sleeve; 11. an angle adjusting bracket; 12. a rotating disk; 13. laser range finder.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like in the prior art and are commercially available in a normal manner unless otherwise specified. The experimental methods, detection methods, and the like in the following examples are conventional experimental methods, detection methods, and the like in the prior art unless otherwise specified.
Example (b): measuring device is used in civil engineering construction
In order to accurately measure the elongation of each steel bar/steel strand and ensure that the prestress is obtained according to the standard, the device is designed into the following structure:
the method for measuring the lengths of the two ends of each steel bar one by one before and after tensioning is adopted, and the method is set as two devices which are matched for use: a positioning assembly and a measuring assembly.
The bottom of the positioning assembly and the bottom of the measuring assembly are both provided with clamping frames, the clamping frames are used for clamping the reinforcing steel bars, and the clamping frames of the two assemblies are of the same structure.
The clamping frame comprises a mounting plate 1, wherein the mounting plate 1 is a planar plate body and is used for fixedly mounting a positioning assembly or a measuring assembly.
Be fixed with flexure strip 2 on the bottom surface of mounting panel 1, flexure strip 2 is the V shape structure, and the bottom draws in, specifically includes fixed part and clamping part, the horizontal plate of fixed part for fixing in mounting panel 1 bottom surface, the setting of clamping part symmetry is in the both sides of fixed part, the top side of clamping part and the both sides integrated into one piece of fixed part, the bottom side of clamping part gathers together along with downwardly extending, forms the V-arrangement that the clamping part bottom side was gathered together, fixed part and clamping part integrated into one piece are the flexure strip 2 of metal panel beating, have the elastic force that draws close each other in the bottom side of clamping part.
The bottom side of clamping part is rotatable installs rubber column 3, be equipped with unsmooth texture on the circumference lateral wall of rubber column 3 for improve and add the effect of holding and increase frictional force, two rubber column 3 sets up side by side and global parallel closes up. For holding the bars on both sides.
The middle part of fixed part is equipped with kicking block 4 rather than fixed connection, the bottom surface of kicking block 4 is the arc face, and the top side that runs through the reinforcing bar between two clamping parts is global to be adapted to for the top is leaned on in the upper surface that catches up tightly, embraces the centre gripping on the reinforcing bar with two rubber columns 3 together tightly, realizes striding astride and fixed of holding frame and reinforcing bar.
The positioning assembly is a positioning plate 5 which is vertically arranged, positioning lines are arranged on the positioning plate 5, the positioning lines can be in the forms of cross lines, annular target lines, cross grid lines and the like, the positioning is convenient and rapid, and the point positions calibrated by front and back measurement are ensured to be consistent.
The measuring assembly comprises a fixing base 6, the fixing base 6 is fixed on the mounting plate 1, one side of the fixing base 6 is provided with a first hinged seat, the first hinged seat is hinged with a swing arm 7, the top end of the swing arm 7 is provided with a hoop frame 9, the swing arm 7 is fastened and limited through a first bolt 8 in a hinged mode with the first hinged seat, specifically, a threaded hole is formed in the first hinged seat, the first bolt 8 penetrates through the threaded hole and is in threaded fit with the threaded hole, and therefore the inner end of a screw rod of the first bolt 8 abuts against the swing arm 7 to be fixed.
The hoop frame 9 is internally provided with an angle adjusting support 11 which is in running fit with the inner ring of the hoop frame, the outer end of the angle adjusting support 11 is a shaft, the inner ring of the hoop frame 9 rotates, and the angle adjusting support 11 can be locked by tightening the second screw rod, so that the angle adjusting support 11 is locked relative to the rotation of the hoop frame 9.
The angle adjusting bracket 11 horizontally extends, a circular rotating groove is formed in the top face of one end, far away from the hoop frame 9, of the angle adjusting bracket 11, a third bolt penetrating through the side wall of the rotating groove is arranged on the side wall of the rotating groove, a horizontally rotating rotary disc 12 is matched in the rotating groove in a rotating mode, the bottom of the rotary disc 12 is inserted into the rotating groove and is matched with the rotating groove in a rotating mode, and a circle of angle scales are arranged at the bottom of the rotary disc 12 and used for calibrating a rotating angle.
The third screw can lock the rotation of the rotary disk 12.
The rotating disc 12 is provided with a laser range finder 13, the laser range finder 13 is used for positioning the positioning plate 5, and after the positioning position before tensioning is found, the distance between the positioning plate and the positioning plate is obtained.
The swing angle of the laser range finder 13 can be adjusted by the angle adjusting bracket 11, and the angle of the horizontal rotation of the positioning plate 5 can be adjusted by the rotating disc 12.
The positioning assembly is arranged on the anchoring point at one end of the steel bar, and the measuring assembly is clamped on the anchoring point at the other end of the steel bar, so that the laser range finder 13 of the measuring assembly is used for adjusting the angle to focus the fixing position of the positioning plate 5 on the positioning assembly. The method has the advantages that L is obtained by measuring once before tensioning, L 'is obtained by measuring once after tensioning, the actual numerical value of the stretching amount of the steel bar caused by the tensioning process can be obtained by subtracting the L' from the L 'by the L', the actual numerical value is obtained by directly measuring and is very accurate, and the problems that the difference of the stretching amount of the steel bar is very large, some tensioning is not enough, and some tensioning is excessive can be solved if all the steel bars are measured.
Claims (8)
1. The measuring device for civil engineering construction is characterized by comprising a positioning assembly and a measuring assembly, wherein clamping frames are arranged at the bottoms of the positioning assembly and the measuring assembly, and the clamping frames and reinforcing steel bars can be detachably fixed;
the positioning assembly is a positioning plate which is vertically arranged, and a positioning line is arranged on the positioning plate;
the measuring assembly is provided with a laser range finder which is used for positioning the positioning plate and obtaining the distance between the positioning plate and the positioning plate.
2. The measuring device for civil engineering construction according to claim 1, wherein the positioning line comprises any one of a cross line, an annular target line, a grid line or a combination of several lines.
3. The measuring device for civil engineering construction according to claim 1, wherein the holding frame comprises a mounting plate, the mounting plate is a planar plate body and is used for fixedly mounting the positioning assembly or the measuring assembly thereon;
be fixed with the flexure strip on the bottom surface of mounting panel, the flexure strip is V shape structure, and the bottom draws in, specifically includes fixed part and clamping part, the fixed part is the horizontal plate of fixing in the mounting panel bottom surface, the setting of clamping part symmetry is in the both sides of fixed part, the top side of clamping part and the both sides integrated into one piece of fixed part, the bottom side of clamping part gathers together along with downwardly extending, forms the V-arrangement that the clamping part bottom side closed together, has the elastic force that draws close each other in the bottom side of clamping part, the rotatable rubber post of installing of bottom side of clamping part, two the rubber post sets up side by side and global parallel closes.
4. The measuring device for civil engineering construction according to claim 3, wherein the measuring assembly comprises a fixed base fixed on the mounting plate, a first hinge seat is provided on one side of the fixed base, a swing arm is hinged on the first hinge seat, the swing arm is hinged with the first hinge seat and is fastened and limited by a first bolt, a hoop frame is provided on the top end of the swing arm, the hoop frame is C-shaped, an angle adjusting bracket rotationally matched with the inner ring of the hoop frame is provided in the hoop frame, the hoop frame locks the angle adjusting bracket by a second screw rod, the outer end of the angle adjusting bracket is a shaft member and rotates in the inner ring of the hoop frame, the angle adjusting bracket extends horizontally, a circular rotating groove is provided on the top surface of one end of the angle adjusting bracket far away from the hoop frame, and a rotating disc rotating horizontally is rotationally matched in the rotating groove, the bottom of rolling disc inserts and rotates the inslot and with rotating groove normal running fit, be equipped with the third bolt that is used for locking the rolling disc on rotating groove's the lateral wall, the bottom of rolling disc is equipped with round angle scale for mark pivoted angle, laser range finder sets up on the rolling disc.
5. The measuring device for civil engineering construction according to claim 4, wherein a thread groove is provided at one end of the C-shaped opening of the hoop frame, a sleeve is provided at the other end of the C-shaped opening of the hoop frame, a second screw is rotatably fitted in the sleeve, an outer end of the second screw is exposed outside the sleeve and provided with a handle, and an inner end of the second screw penetrates out of the inner end of the sleeve and is in threaded connection with the thread groove, so that the hoop frame is closed and tightened.
6. The measuring device for civil engineering construction according to claim 3, wherein the circumferential side wall of the rubber column is provided with a concavo-convex texture.
7. The measuring device for civil engineering construction according to claim 3, wherein a top block fixedly connected with the fixing portion is provided in the middle of the bottom surface of the fixing portion, and the bottom surface of the top block is an arc-shaped surface adapted to the top side peripheral surface of the reinforcing steel bar passing through between the two clamping portions.
8. The measuring device for civil engineering construction according to claim 3, wherein the circumferential side wall of the rubber column is provided with a concavo-convex texture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219480.6A CN111336929A (en) | 2020-03-25 | 2020-03-25 | Measuring device is used in civil engineering construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219480.6A CN111336929A (en) | 2020-03-25 | 2020-03-25 | Measuring device is used in civil engineering construction |
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| Publication Number | Publication Date |
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| CN111336929A true CN111336929A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010219480.6A Pending CN111336929A (en) | 2020-03-25 | 2020-03-25 | Measuring device is used in civil engineering construction |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2875931Y (en) * | 2005-12-06 | 2007-03-07 | 吴纯标 | Fast locking device of handlebar and saddle seat |
| CN200965138Y (en) * | 2006-09-30 | 2007-10-24 | 正翰科技股份有限公司 | Adjustable fixing bracket structure |
| CN201653372U (en) * | 2010-03-25 | 2010-11-24 | 任勇 | Petroleum pipeline length measurement device |
| CN103424082A (en) * | 2013-07-30 | 2013-12-04 | 四川华腾公路试验检测有限责任公司 | Non-contact type reinforcing steel bar deformation measurement device and measurement method thereof |
| CN203873710U (en) * | 2014-05-19 | 2014-10-15 | 宁波乐彩塑业有限公司 | Clamp type mop rack |
| CN108168437A (en) * | 2017-12-27 | 2018-06-15 | 海宁文硕科技咨询有限公司 | A kind of busbar in high tension distribution system stretches quantity measuring method |
| CN209244282U (en) * | 2018-10-24 | 2019-08-13 | 辛桂芹 | A kind of prestressed, reinforced device |
-
2020
- 2020-03-25 CN CN202010219480.6A patent/CN111336929A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2875931Y (en) * | 2005-12-06 | 2007-03-07 | 吴纯标 | Fast locking device of handlebar and saddle seat |
| CN200965138Y (en) * | 2006-09-30 | 2007-10-24 | 正翰科技股份有限公司 | Adjustable fixing bracket structure |
| CN201653372U (en) * | 2010-03-25 | 2010-11-24 | 任勇 | Petroleum pipeline length measurement device |
| CN103424082A (en) * | 2013-07-30 | 2013-12-04 | 四川华腾公路试验检测有限责任公司 | Non-contact type reinforcing steel bar deformation measurement device and measurement method thereof |
| CN203873710U (en) * | 2014-05-19 | 2014-10-15 | 宁波乐彩塑业有限公司 | Clamp type mop rack |
| CN108168437A (en) * | 2017-12-27 | 2018-06-15 | 海宁文硕科技咨询有限公司 | A kind of busbar in high tension distribution system stretches quantity measuring method |
| CN209244282U (en) * | 2018-10-24 | 2019-08-13 | 辛桂芹 | A kind of prestressed, reinforced device |
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Application publication date: 20200626 |