CN113029118A - Engineering arc pay-off device and pay-off method thereof - Google Patents
Engineering arc pay-off device and pay-off method thereof Download PDFInfo
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- CN113029118A CN113029118A CN202110441296.0A CN202110441296A CN113029118A CN 113029118 A CN113029118 A CN 113029118A CN 202110441296 A CN202110441296 A CN 202110441296A CN 113029118 A CN113029118 A CN 113029118A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 50
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 3
- 239000003550 marker Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/02—Means for marking measuring points
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/12—Measuring inclination, e.g. by clinometers, by levels by using a single pendulum plumb lines G01C15/10
Abstract
The invention relates to an engineering arc pay-off device and a pay-off method thereof, wherein the engineering arc pay-off device comprises: the height of the bracket is adjustable; laser emission subassembly installs on the support, and each laser emission head of laser emission subassembly sets up down and the laser beam that each laser emission head sent can link into circularly when projecting on a plane, can realize adjusting the circular shape size that the laser beam projected and link into on the plane through the height of adjusting the support, and the mark subassembly marks in order to accomplish the circular arc unwrapping wire through the projection position of mark subassembly edge laser beam, and construction simple operation, the precision of the arc line that obtains is higher.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to an engineering arc pay-off device and a pay-off method thereof.
Background
The measurement and setting-out of engineering is an indispensable step of site construction, is the basic work of engineering construction, the working efficiency of the measurement and setting-out of engineering affects the construction progress of the whole engineering, and because of the pursuit of modern aesthetics, the engineering construction often encounters arc modeling, and how to improve the accuracy and the construction efficiency of arc setting-out is the target of engineering technology development.
At present, circular arcs are generally divided into a plurality of straight lines by CAD software for circular arc paying-off, the straight lines are paid-off on site and are connected to form a circular arc with a broken line integrally, the precision is not high, the circular arcs need to be divided into a plurality of sections, the workload for the circular arcs with longer lengths is higher, the method is only limited to the field with a relatively spacious field and a relatively flat construction surface, and the broken line sections formed by connecting the plurality of straight lines are obtained according to the method, so the circular arc precision is not high, the construction is relatively complex, and the construction efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an engineering arc pay-off device and a pay-off method thereof so as to solve the problems of low arc precision and low construction efficiency of the existing engineering arc pay-off method.
In order to achieve the above object, the present invention provides an engineering arc pay-off device, comprising:
the height of the bracket is adjustable;
the laser emission assembly is arranged on the support, each laser emission head of the laser emission assembly is arranged downwards, laser beams emitted by each laser emission head can be connected into a circle when being projected onto a plane, and the size of the circle formed by the projection of the laser beams onto the plane can be adjusted by adjusting the height of the support; and
and the marking assembly is used for marking the projection position of the laser beam along the marking assembly so as to complete circular arc paying-off.
The laser beams emitted by the laser emitting heads can be connected into a circle when being projected onto a plane, the circle formed by projecting the laser beams onto the plane is overlapped with two end points of an arc line to be lofted, the size of the circle formed by projecting the laser beams onto the plane is adjusted by adjusting the height of the support, so that the device can project a circle with a proper size to be matched with the arc lines with different sizes according to needs, and the marking assembly marks the projection position of the laser beams to complete arc paying-off, the construction operation is convenient, and the obtained arc lines are higher in precision.
The engineering circular arc pay-off device is further improved in that the laser emission assembly comprises a plurality of laser emitters which are arranged on the support in a supporting mode and distributed in a radial mode, the laser emitters are inclined, included angles between the laser emitters and the vertical direction are consistent, the included angles are consistent in height, and laser beams emitted by laser emission heads of the laser emitters can be connected into a circle when projected onto a plane.
The engineering circular arc pay-off device is further improved in that the support comprises a base and a plurality of support legs which are rotatably arranged below the base;
the laser transmitters are supported on the base;
the height of the supporting legs is adjustable, and the height of the support is adjusted by adjusting the height of the supporting legs.
The engineering circular arc pay-off device is further improved in that the supporting leg comprises two rod pieces and a limiting piece which are mutually sleeved;
one end of the limiting piece penetrates through and is screwed with the rod piece positioned on the outer side and abuts against the rod piece positioned on the inner side, so that the two rod pieces are fixedly connected;
the height of the supporting leg can be adjusted by adjusting the length of the overlapped part of the two rod pieces.
The engineering circular arc pay-off device is further improved in that the engineering circular arc pay-off device further comprises a plumb bob which is hung at the bottom of the base and aligned with the circle center position of a circle which is formed by projecting the laser beam onto a plane and is used for aligning the circle center position of a circular arc line to be lofted.
The invention also provides an engineering arc pay-off method, which comprises the following steps:
providing a support, wherein the height of the support is adjustable, and the support is arranged on a construction surface corresponding to the circle center position of the circular arc line to be lofted;
providing a laser emission assembly, installing the laser emission assembly on the bracket, arranging all laser emission heads of the laser emission assembly downwards, and connecting laser beams emitted by all the laser emission heads into a circle on a projection to a construction surface; and
and adjusting the height of the support to enable the laser beam to project to a circle formed by connection on the construction surface to coincide with two end points of the arc line to be lofted so as to finish arc paying-off.
According to the invention, the laser beams emitted by the laser emitting heads are projected onto the construction surface to be connected into a circle, the circle projected onto the construction surface by the laser beams is superposed with two end points of the circular arc line to be lofted, and the size of the circle projected onto the construction surface by the laser beams is adjusted by adjusting the height of the support, so that the device can project a circle with a proper size to be adapted to the circular arc lines with different sizes according to requirements, and the circular arc line is marked along the projection position of the laser beams by the marking assembly to complete circular arc line laying, so that the construction operation is convenient and fast, and the obtained circular arc line has higher precision.
The invention further improves the engineering circular arc paying-off method, and provides a laser emission assembly, wherein the laser emission assembly is arranged on the bracket, each laser emission head of the laser emission assembly is arranged downwards, and laser beams emitted by each laser emission head are projected to a construction surface and connected into a circle, and the step comprises the following steps:
providing a plurality of laser transmitters, radially supporting the plurality of laser transmitters on the support, obliquely arranging the laser transmitters, enabling included angles between the plurality of laser transmitters and the vertical direction to be consistent and heights to be consistent, and enabling laser beams emitted by laser emitting heads of the plurality of laser transmitters to be projected to a construction surface to be connected into a circle.
The engineering circular arc pay-off method is further improved in that before the bracket is arranged on a construction surface corresponding to the circle center position of the circular arc line to be lofted, the method further comprises the following steps:
and lofting the positions of two end points of the circular arc line to be lofted and the position of the circle center by using a total station instrument, and marking.
The further improvement of the engineering circular arc pay-off method is that a support is provided, the height of the support is adjustable, and the step of installing the support on a construction surface corresponding to the circle center position of the circular arc line to be lofted comprises the following steps:
providing a base and a support leg, wherein the height of the support leg is adjustable, the support leg is rotatably arranged below the base, and the height of the support is adjusted by adjusting the height of the support leg;
and mounting the supporting legs on the construction surface, and enabling the base position to correspond to the circle center position of the circular arc line to be lofted.
The invention further improves the engineering circular arc paying-off method, and provides a supporting leg, wherein the height of the supporting leg is adjustable, and the method comprises the following steps:
providing two rod pieces and a limiting piece, sleeving the two rod pieces, penetrating and screwing one end of the limiting piece to the rod piece positioned on the outer side, and abutting against the rod piece positioned on the inner side to fixedly connect the two rod pieces;
the height of the supporting leg can be adjusted by adjusting the length of the overlapped part of the two rod pieces.
Drawings
FIG. 1 is a state diagram of the engineering circular arc pay-off method of the present invention.
In the figure: the device comprises a support 1, a base 11, a supporting leg 12, a laser emitter 2, a mounting seat 3, a marking assembly 4, a container 41, a conduit 42, an ink needle 43, a flow regulator 44, a steel nail 5 and a steel wire 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an engineering arc pay-off device and a pay-off method thereof, which are used for engineering arc pay-off. According to the invention, the laser beams emitted by the laser emitting heads are projected onto the construction surface to be connected into a circle, the circle projected onto the construction surface by the laser beams is superposed with two end points of the circular arc line to be lofted, and the size of the circle projected onto the construction surface by the laser beams is adjusted by adjusting the height of the support, so that the device can project a circle with a proper size to be adapted to the circular arc lines with different sizes according to requirements, and the circular arc line is marked along the projection position of the laser beams by the marking assembly to complete circular arc line laying, so that the construction operation is convenient and fast, and the obtained circular arc line has higher precision.
The invention relates to an engineering arc pay-off device and a pay-off method thereof, which are described in the following with reference to the accompanying drawings.
In building and installation sites, arc paying-off is frequently encountered, for example, circular structures or decorations in highways, railways, water conservancy, electric power, building buildings and municipal garden engineering, and the arc paying-off is needed in places almost having building construction. And the circular arc line formed by linear connection in the prior art has poor precision, so the application provides a method for improving the circular arc paying-off precision.
Referring to fig. 1, in the present embodiment, an engineering circular arc pay-off device includes a height-adjustable bracket 1, a laser emitting assembly mounted on the bracket 1, and a marking assembly 4, wherein each laser emitting head of the laser emitting assembly is arranged downward, and laser beams emitted by each laser emitting head can be connected into a circle when projected onto a plane, and the size of the circle connected by the laser beams projected onto the plane can be adjusted by adjusting the height of the bracket 1; the projected position along the laser beam is marked by the marking assembly 4 to complete the circular arc payoff.
Laser beams that each laser emission head sent in engineering circular arc pay-off in this embodiment can link into circularly when projection is to a plane, laser beam projection is to two endpoints coincidence of the circular of linking into and the circular arc line of treating the lofting on the plane, through the height of adjusting support 1, with the circular size of linking into on adjusting the laser beam projection to the plane, consequently the device can project the circular arc line with the not unidimensional of adaptation that suitable size is gone out as required, mark along the projection position of laser beam through mark subassembly 4, with the circular arc unwrapping wire of completion, construction operation is convenient, the precision of the circular arc line that obtains is higher.
Referring to fig. 1, further, the laser emission subassembly is including propping up and locating a plurality of laser emitter 2 above support 1 and being radial distribution, and laser emitter 2 is the slope form, and a plurality of laser emitter 2 is unanimous and highly uniform with the contained angle of vertical direction, and the laser beam that sends through the laser emission head of a plurality of laser emitter 2 can link into circularly when projecting to a plane. Preferably, the laser emitters 2 are densely distributed.
Referring to fig. 1, in this embodiment, the engineering circular arc pay-off device further includes a mounting base 3 fixedly disposed on the support 1, and the plurality of laser emitters 2 are radially disposed on an outer wall of the mounting base 3.
Referring to fig. 1, in the present embodiment, the support 1 includes a base 11 and a plurality of legs 12 rotatably installed below the base 11, the plurality of laser emitters 2 are erected on the base 11, the legs 12 are adjustable in height, and the height of the support 1 is adjusted by adjusting the height of the legs 12.
Referring to fig. 1, further, the leg 12 includes two rod members sleeved with each other and a limiting member, one end of the limiting member passes through and is screwed to the rod member located on the outer side, and abuts against the rod member located on the inner side, so that the two rod members are fixedly connected, and the height of the leg 12 can be adjusted by adjusting the length of the overlapped portion of the two rod members.
Referring to fig. 1, further, the engineering circular arc pay-off device further includes a plumb bob hung at the bottom of the base 11 and aligned with the circular center position projected by the laser beam onto the plane, wherein the plumb bob is used for aligning the center position of the circular arc line to be lofted, and the plumb bob is used for aligning the center position of the circular arc line to be lofted so as to ensure that the projected circular laser pattern coincides with the center position of the circular arc line to be lofted, thereby ensuring the accuracy of the circular arc line.
Referring to fig. 1, further, the marking assembly 4 includes a dye liquid, a container 41 for containing the dye liquid, a conduit 42 communicating with the container 41, and an ink needle 43 communicating with an end of the conduit 42 away from the container 41, and performs circular arc payoff by moving the ink needle 43 along a projection position of the laser beam and dropping the dye liquid.
Referring to fig. 1, further, the marker assembly 4 further includes a flow regulator 44 mounted on the conduit 42 for regulating the flow of the dye solution.
Referring to fig. 1, further, the engineering circular arc pay-off device further includes a plurality of steel nails 5 arranged at the projection position of the laser beam and steel wires 6 wound on the plurality of steel nails 5 along the projection position of the laser beam to complete circular arc pay-off.
The working flow of the engineering circular arc pay-off device of the invention is explained below.
The method comprises the steps of utilizing a total station to loft and mark the positions of two end points and the circle center position of an arc line to be lofted, installing a support 1 corresponding to the circle center position of the arc line to be lofted on a construction surface, enabling a plumb to be aligned with the circle center position of the arc line to be lofted, starting a plurality of laser emitters 2, projecting laser beams emitted by laser emitters of the plurality of laser emitters 2 onto a plane and connecting the laser beams into a circle, adjusting the height of the support 1 to enable the circle connected on the laser beam projection construction surface to coincide with the two end points of the arc line to be lofted, and moving a marking assembly 4 along the part of the arc line to be lofted on a laser pattern and dripping dye liquid to complete arc paying-off.
Referring to fig. 1, the invention also provides an engineering arc pay-off method comprising the following steps:
s101; and providing a support 1, wherein the height of the support 1 is adjustable, and the support 1 is arranged on a construction surface corresponding to the circle center position of the circular arc line to be lofted.
S102; providing a laser emission assembly, installing the laser emission assembly on the support 1, arranging all laser emission heads of the laser emission assembly downwards, and connecting laser beams emitted by all the laser emission heads into a circle on a projection construction surface.
S103; and adjusting the height of the support 1 to enable the laser beam to project to the construction surface to form a circle, wherein the circle is coincided with two end points of the arc line to be lofted and is coincided with two end points of the arc line to be lofted, so that arc paying-off is completed.
Referring to fig. 1, further, providing a laser emitting assembly, installing the laser emitting assembly on the support 1, arranging each laser emitting head of the laser emitting assembly downward, and connecting laser beams emitted by each laser emitting head to form a circle in a projection manner on a construction surface, the step including:
providing a plurality of laser transmitters 2, radially supporting the plurality of laser transmitters 2 on the support 1, obliquely arranging the laser transmitters 2, enabling included angles of the plurality of laser transmitters 2 and the vertical direction to be consistent and height to be consistent, and enabling laser beams emitted by laser emitting heads of the plurality of laser transmitters 2 to be projected to a construction surface to be connected into a circle. Preferably, the laser emitters 2 are densely distributed.
Referring to fig. 1, further, before the bracket 1 is installed on the construction surface corresponding to the circle center of the circular arc line to be lofted, the method further includes the following steps:
and lofting the positions of two end points of the circular arc line to be lofted and the position of the circle center by using a total station instrument, and marking.
Preferably, first, a known point is selected, the total station is set up, the total station is leveled and centered, the coordinates of the point are input to set up the survey station, and a prism is set up at another known point by another person. And then, after the back viewpoint coordinates are input, the total station sighting prism is subjected to back vision, distance measurement and recording. Then, a point is placed, and coordinates of a point to be placed (for example, position coordinates of an end point of a circular arc line to be placed or center position coordinates) are input. And finally, rotating the total station to enable the horizontal angle to be 0 degree, erecting the prism on an extension line of an eyepiece of the total station, moving the prism back and forth to enable the measured horizontal distance to be zero, and completing lofting at the point.
Referring to fig. 1, in this embodiment, provide support 1, support 1 height-adjustable who provides, the step of installing support 1 in the construction face corresponding to the centre of a circle position of the circular arc line of waiting to loft includes:
a base 11 and a leg 12 are provided, the height of the leg 12 is adjustable, the leg 12 is rotatably arranged under the base 11, and the height of the support 1 is adjusted by adjusting the height of the leg 12.
The supporting legs 12 are arranged on a construction surface, and the base 11 corresponds to the circle center position of the circular arc line to be lofted.
Referring to fig. 1, further, a leg 12 is provided, the step of providing a height adjustable leg 12 comprising:
providing two rod pieces and a limiting piece, sleeving the two rod pieces, penetrating and screwing one end of the limiting piece to the rod piece positioned on the outer side, and abutting against the rod piece positioned on the inner side to fixedly connect the two rod pieces.
The height of the leg 12 can be adjusted by adjusting the length of the overlapping portion of the two bars.
Referring to fig. 1, further, after the support legs 12 are installed, a plumb bob is provided, and the plumb bob is hung at the bottom of the base 11, and is aligned with the center of a circle formed by projecting the laser beam onto the construction surface.
When the supporting leg 12 is installed on a construction surface, the plumb bob is aligned to the circle center position of the circular arc line to be lofted, and the plumb bob is aligned to the circle center position of the circular arc line to be lofted, so that the circle formed by projecting the laser beam onto the construction surface and connected is coincided with the circle center position of the circular arc line to be lofted, and the accuracy of the circular arc line is ensured.
Referring to fig. 1, in this embodiment, the engineering circular arc pay-off method further includes the following steps:
and providing a marking assembly 4, and marking the projection position of the laser beam through the marking assembly 4 to complete the circular arc paying-off.
Referring to fig. 1, further, the step of providing a marker assembly 4 includes: a dye liquid, a container 41, a conduit 42 and an ink needle 43 are provided, the container 41 is provided for containing the dye liquid, the container 41 is communicated with the conduit 42, and one end of the conduit 42 far away from the container 41 is communicated with the ink needle 43.
The circular arc payoff is performed by moving the ink needle 43 along the projection position of the laser beam and dropping the dye liquid.
Referring to fig. 1, further, the step of providing the marking assembly 4 further comprises:
a flow regulator 44 is provided, the flow regulator 44 being provided for regulating the flow rate of the dye liquid, the flow regulator 44 being mounted on the conduit 42.
Referring to fig. 1, preferably, the engineering circular arc pay-off method further comprises the following steps:
providing a steel nail 5 and a steel wire 6, fixing the projection position of the steel nail 5 corresponding to the laser beam on a construction surface, and winding the steel wire 6 on the steel nail 5 along the projection position of the laser beam to complete circular arc paying off.
Referring to fig. 1, in the present embodiment, the step of radially supporting a plurality of laser transmitters 2 on a support 1 includes:
providing a mounting base 3, fixing the mounting base 3 on the bracket 1,
a plurality of laser emitter 2 is radially distributed and is installed on the outer wall of mount pad 3.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
Claims (10)
1. An engineering circular arc pay-off device is characterized by comprising:
the height of the bracket is adjustable;
the laser emission assembly is arranged on the support, each laser emission head of the laser emission assembly is arranged downwards, laser beams emitted by each laser emission head can be connected into a circle when being projected onto a plane, and the size of the circle formed by the projection of the laser beams onto the plane can be adjusted by adjusting the height of the support; and
and the marking assembly is used for marking the projection position of the laser beam along the marking assembly so as to complete circular arc paying-off.
2. The engineering circular arc pay-off device as claimed in claim 1, wherein the laser emission assembly comprises a plurality of laser emitters radially distributed on the support, the laser emitters are inclined, included angles between the plurality of laser emitters and the vertical direction are consistent and the height of the laser emitters is consistent, and laser beams emitted by laser emission heads of the plurality of laser emitters can be connected into a circle when projected onto a plane.
3. The engineering circular arc pay-off device as claimed in claim 1, wherein the support comprises a base and a plurality of legs rotatably mounted below the base;
the laser transmitters are supported on the base;
the height of the supporting legs is adjustable, and the height of the support is adjusted by adjusting the height of the supporting legs.
4. The engineering circular arc pay-off device as claimed in claim 3, wherein the supporting leg comprises two rod members and a limiting member which are sleeved with each other;
one end of the limiting piece penetrates through and is screwed with the rod piece positioned on the outer side and abuts against the rod piece positioned on the inner side, so that the two rod pieces are fixedly connected;
the height of the supporting leg can be adjusted by adjusting the length of the overlapped part of the two rod pieces.
5. The engineering circular arc pay-off device according to claim 3, further comprising a plumb bob hung at the bottom of the base and aligned with the center position of the circle formed by the laser beam projected on the plane, wherein the plumb bob is used for aligning the center position of the circular arc line to be lofted.
6. An engineering circular arc pay-off method is characterized by comprising the following steps:
providing a support, wherein the height of the support is adjustable, and the support is arranged on a construction surface corresponding to the circle center position of the circular arc line to be lofted;
providing a laser emission assembly, installing the laser emission assembly on the bracket, arranging all laser emission heads of the laser emission assembly downwards, and connecting laser beams emitted by all the laser emission heads into a circle on a projection to a construction surface; and
and adjusting the height of the support to enable the laser beam to project to a circle formed by connection on the construction surface to coincide with two end points of the arc line to be lofted so as to finish arc paying-off.
7. The method for paying off engineering circular arc according to claim 6, wherein a laser emitting assembly is provided, the laser emitting assembly is installed on the support, each laser emitting head of the laser emitting assembly is arranged downwards, and laser beams emitted by each laser emitting head are projected to a construction surface and connected into a circle, and the step comprises the following steps:
providing a plurality of laser transmitters, radially supporting the plurality of laser transmitters on the support, obliquely arranging the laser transmitters, enabling included angles between the plurality of laser transmitters and the vertical direction to be consistent and heights to be consistent, and enabling laser beams emitted by laser emitting heads of the plurality of laser transmitters to be projected to a construction surface to be connected into a circle.
8. The engineering circular arc pay-off method as claimed in claim 6, wherein before the bracket is mounted on a construction surface corresponding to the circle center position of the circular arc line to be lofted, the method further comprises the following steps:
and lofting the positions of two end points of the circular arc line to be lofted and the position of the circle center by using a total station instrument, and marking.
9. The engineering circular arc pay-off method according to claim 6, wherein a support is provided, the height of the provided support is adjustable, and the step of installing the support on a construction surface corresponding to the circle center position of the circular arc line to be lofted comprises the following steps:
providing a base and a support leg, wherein the height of the support leg is adjustable, the support leg is rotatably arranged below the base, and the height of the support is adjusted by adjusting the height of the support leg;
and mounting the supporting legs on the construction surface, and enabling the base position to correspond to the circle center position of the circular arc line to be lofted.
10. The method of engineering circular arc pay-off of claim 9, wherein a leg is provided, and the step of providing a height-adjustable leg comprises:
providing two rod pieces and a limiting piece, sleeving the two rod pieces, penetrating and screwing one end of the limiting piece to the rod piece positioned on the outer side, and abutting against the rod piece positioned on the inner side to fixedly connect the two rod pieces;
the height of the supporting leg can be adjusted by adjusting the length of the overlapped part of the two rod pieces.
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Application publication date: 20210625 |