Deformation Monitoring Device and Monitoring Method for Inclined Tower Column Steel Formwork

Abstract

The present invention discloses a deformation monitoring device and a monitoring method for an inclined tower column steel formwork, comprising: a track fixed to the outer side of the formwork, on which a traveling trolley is arranged; a column vertically fixed and located on one side of the track, with a certain distance between the column and the track, and the column has a fixed end; wherein, a wire rope displacement encoder and an angle measurement encoder are connected between the traveling trolley and the fixed end, and the track, the traveling trolley, the wire rope displacement encoder, the angle measurement encoder and the fixed end are all in the same plane. The present invention has the advantages of convenient installation and disassembly, can quickly obtain the deformation at the measuring point of the formwork, and ensures the accuracy of data.

Description

Technical Field

[0001] The present invention relates to the field of concrete pylon construction. More specifically, the present invention relates to a deformation monitoring device and monitoring method for a steel formwork of an inclined tower column. Background Art

[0002] During the construction of long-span cable-stayed bridges, concrete pylons are mostly in the shapes of "A", "Y", "H", etc. The concrete pouring of the tower limbs is usually carried out section by section from bottom to top. Before pouring each section of concrete, the size of the tower limb cross-section needs to be shaped by the formwork. During the actual pouring process, the uneven fluidity of the concrete will generate a large lateral pressure on the tower limb formwork, which may cause local or even overall deformation of the tower limb formwork. Moreover, the formwork is exposed to the external environment, and the deformation of the formwork will affect the pouring quality of the tower limb cross-section. If there are gaps between adjacent upper and lower formworks due to deformation, leakage of slurry is likely to occur, affecting the construction quality. The traditional manual measurement method has discontinuous data, limited measuring points at the same height, large errors and time-consuming. In view of this, a formwork deformation monitoring device and monitoring method are proposed. Summary of the Invention

[0003] To solve the above technical problems, the purpose of the present invention is to provide a deformation monitoring device and monitoring method for a steel formwork of an inclined tower column, which is convenient for installation and disassembly, can quickly obtain the deformation at the measuring points of the formwork, and ensure the accuracy of data.

[0004] The technical solution adopted by the present invention to solve this technical problem is: a deformation monitoring device for a steel formwork of an inclined tower column, comprising:

[0005] A track, which is fixed on the outer side of the formwork, and a traveling trolley is arranged on the track;

[0006] A column, which is vertically fixed and located on one side of the track. There is a certain distance between the column and the track, and the column has a fixed end;

[0007] Wherein, a wire rope displacement encoder and an angle measurement encoder are connected between the traveling trolley and the fixed end, and the track, the traveling trolley, the wire rope displacement encoder, the angle measurement encoder and the fixed end are all in the same plane.

[0008] Preferably, the thickness ratio of the formwork to the track is greater than or equal to 8:1.

[0009] Preferably, the material of the track is the same as that of the formwork.

[0010] Preferably, a fixing ring is arranged on the column to form the fixed end.

[0011] Preferably, a wire rope displacement encoder and an angle measurement encoder are connected between the traveling trolley and the fixed end through a rigid rope.

[0012] Preferably, the ratio of the track length to the trolley length is greater than or equal to 600:1.

[0013] The present invention also provides a monitoring method using the deformation monitoring device of the inclined tower column steel formwork, including:

[0014] a. Taking the center point of the traveling trolley as the measuring point, when the formwork is not loaded and the external environment is not disturbed, the traveling trolley travels on the track, and the wire rope displacement encoder can obtain the displacement value; wherein, when the trolley moves to the position where the wire rope of the wire rope displacement encoder is horizontal, the horizontal distance at this time is L0, and the angle measured by the angle measuring instrument is 0 rad. At this time, taking the measuring point as the origin O of the rectangular coordinate system, along the inclined direction of the formwork as the x-axis, the normal direction of the formwork as the y-axis, and the inclination angle of the formwork as θ;

[0015] b. Each time concrete is poured, the traveling trolley travels on the track once, and according to the detection values of the wire rope displacement encoder and the angle measurement encoder when the trolley travels on the track, calculate the coordinates of the measuring point on the x-axis and y-axis, and draw the deformation curve of the formwork according to the coordinates of the measuring point.

[0016] Preferably, the acquisition of the measuring point coordinates and the deformation curve of the formwork is specifically as follows: Compile and store the calculation of the measuring point coordinates and the deformation curve of the formwork as a program on the storage medium; each time the trolley travels, the controller receives the information of the wire rope displacement encoder and the angle measurement encoder, and calls and processes the program in the storage medium to calculate the measuring point coordinates and the formwork deformation curve.

[0017] The present invention has at least the following beneficial effects:

[0018] 1. The inclined formwork deformation measurement device has a simple structure, is convenient for installation and disassembly. Through this device, the deformation curve of the formwork along the height direction can be obtained, saving the arrangement of a large number of measuring points. After one-time setting, it can be continuously used subsequently.

[0019] 2. The monitoring device can obtain the deformation at the measuring point of the formwork, and then through the compiled program, the overall deformation situation of the formwork can be quickly drawn, which is convenient for understanding the deformation situation of the formwork on site and making disposal measures in a timely manner. The monitoring data can be repeatedly verified, reducing the measurement error and ensuring the accuracy of the data.

[0020] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the deformation monitoring device of the present invention;

[0022] Figure 2It is a partial view of the deformation monitoring device of the present invention.

[0023] Explanation of reference numerals: 1 formwork, 2 track, 3 traveling trolley, 4 carbon fiber rope, 5 wire rope displacement encoder, 6 angle measurement encoder, 7 limit block, 8 column, 9 fixing ring, 10 deformation curve. Specific implementation manner

[0024] The present invention will be described in detail and completely below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that: the technical solutions and technical features provided in each part including the following descriptions of the present invention can be combined with each other without conflict.

[0025] In addition, the embodiments of the present invention involved in the following descriptions are usually only part of the embodiments of the present invention, rather than all the embodiments. Therefore, all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, and the specific implementation process is as follows:

[0027] As Figures 1 to 2 shown, the present invention provides a deformation monitoring device for an inclined tower column steel formwork 1:

[0028] Before installing the formwork 1, the track 2 is fixed at an appropriate position outside the formwork 1, and is installed or welded. The track 2 is made of the same material as the formwork 1. Compared with the formwork 1, the thickness of the track 2 can be ignored, and limit blocks 7 are provided at both ends of the track 2. A traveling trolley 3 is arranged on the track 2, and the traveling trolley 3 can move on the track 2;

[0029] The column 8 is made of a rigid material, is vertically fixed and is located on one side of the track 2. There is a certain distance between the column 8 and the track 2, and the column 8 has a fixed end;

[0030] Among them, a wire rope displacement encoder 5 and an angle measurement encoder 6 are connected between the traveling trolley 3 and the fixed end, and the track 2, the traveling trolley 3, the wire rope displacement encoder 5, the angle measurement encoder 6 and the fixed end are all in the same plane.

[0031] In the above technical solution, a deformation measurement device for an inclined formwork 1 has a simple structure, is convenient for installation and disassembly. The deformation curve 10 of the formwork 1 along the height direction can be obtained through 2 monitoring elements, saving the arrangement of a large number of measuring points, and can be continuously used after one-time setting.

[0032] The monitoring device can obtain the deformation at the measuring points of Template 1, and the compilation program can quickly draw the overall deformation of Template 1, facilitating the on-site understanding of the deformation of Template 1 and enabling timely disposal measures. The monitoring data can be repeatedly verified, reducing measurement errors and ensuring data accuracy.

[0033] In another technical solution, when the thickness of Template 1 is 8 mm, the thickness of Track 2 is less than or equal to 1 mm, but it is not limited to this dimension. The thickness of Track 2 is adjusted according to the actual thickness of monitored Template 1. Compared with Template 1, the thickness of Track 2 is much smaller, making the influence of the thickness of Track 2 on the subsequent calculated value negligible.

[0034] This technical solution may also include the following technical details to better achieve the technical effect: The material of Track 2 is the same as that of Template 1, and the two materials are consistent. During concrete pouring, it can reduce the errors caused by different lateral pressures on different materials and improve the monitoring accuracy.

[0035] In another technical solution, a fixed ring 9 is provided on the column 8 to form the fixed end.

[0036] This technical solution may also include the following technical details to better achieve the technical effect: A pull rope displacement encoder 5 and an angle measurement encoder 6 are connected by a carbon fiber rope 4 between the center position of the traveling trolley 3 and the fixed end of the column 8. The carbon fiber rope 4 is not easily deformed, ensuring the measurement accuracy. Here, the length of the trolley is small, and it is considered that the influence of the trolley length on the deformation measurement of Template 1 at the traveling position is negligible, that is, the center point of the trolley is considered as the deformation measuring point.

[0037] This technical solution may also include the following technical details to better achieve the technical effect: When the length of Track 2 is 6000 mm, the length of the trolley is preferably less than or equal to 10 mm, but it is not limited to this dimension. The length of the trolley is adjusted according to the actual Track 2. Compared with Track 2, the length of the trolley is much smaller, and it can be considered that the influence of the trolley length on the deformation measurement of Template 1 at the traveling position is negligible, that is, the center point of the trolley is considered as the measuring point.

[0038] The present invention also provides a method for monitoring the inclined tower column steel formwork 1 using a deformation monitoring device, including:

[0039] a. With the center point of the moving trolley 3 as the measuring point, when the formwork 1 is not loaded and the external environment is not disturbed, the moving trolley 3 travels on the track 2, and the rope displacement encoder 5 can obtain the displacement value. Among them, when the trolley moves to the position where the rope of the rope displacement encoder 5 is in the horizontal position, the horizontal distance at this time is L0, and the angle measured by the angle measuring instrument is 0 rad. At this time, with the measuring point as the origin O of the rectangular coordinate system, along the inclined direction of the formwork 1 as the x-axis, the normal direction of the formwork 1 as the y-axis, and the inclination angle of the formwork 1 is θ;

[0040] b. Each time concrete is poured, the formwork 1 will undergo a certain deformation. At this time, the trolley needs to travel on the track 2 once, and according to the detection values of the rope displacement encoder 5 and the angle measuring encoder 6 when the trolley travels on the track 2, calculate the coordinates (xi, yi) of the measuring point on the x-axis and y-axis, and draw the deformation curve 10 of the formwork 1 according to the measuring point coordinates to obtain the deformation situation of the formwork 1. For the deformation situation, on-site disposal measures are taken.

[0041] The specific principle is as follows:

[0042] As Figures 1 to 2 shown, when the trolley moves to position C, the length of the carbon fiber rope 4 measured at this time is S i , and the movement angle is α i . The extended position of position C is set as B, and the position before deformation is A, then ∠BCA is β i , then Then,

[0043]

[0044] Then,

[0045]

[0046] That is, the coordinates (xi, yi) at each point are as follows respectively:

[0047]

[0048] Then when α i 、S i are known, the deformation yi of the formwork 1 at the corresponding measuring point xi can be solved. Each time the trolley travels once, the deformation curve 10 of the formwork 1 in the height direction can be obtained through the compilation program. According to the deformation curve 10, the deformation situation of the formwork 1 is evaluated, and on-site disposal measures are taken for the deformation situation.

[0049] The technical solution may further include the following technical details to better achieve the technical effects: The acquisition of the measuring point coordinates and the deformation curve of the template is specifically as follows: The calculation and compilation of the measuring point coordinates and the deformation curve of the template are compiled into a program and stored on a storage medium; Each time the trolley travels, the controller receives the information of the wire rope displacement encoder and the angle measurement encoder, and calls and processes the program in the storage medium to calculate the measuring point coordinates and the template deformation curve.

[0050] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the embodiments shown and described here.

Claims

1. A deformation monitoring device for a steel formwork of an inclined tower column, characterized in that, Comprising: A track, which is fixed to the outer side of the formwork, and a traveling trolley is arranged on the track; A column, which is vertically fixed and located on one side of the track, there is a certain distance between the column and the track, and the column has a fixed end; Wherein, a pull - rope displacement encoder and an angle measurement encoder are connected by a rigid rope between the traveling trolley and the fixed end, and the track, the traveling trolley, the pull - rope displacement encoder, the angle measurement encoder and the fixed end are all in the same plane; The material of the track is the same as that of the formwork, and the thickness ratio of the formwork to the track is greater than or equal to 8:

1.

2. The deformation monitoring device for the inclined tower column steel formwork according to claim 1, wherein A fixing ring is arranged on the column to form the fixed end.

3. The deformation monitoring device and monitoring method for the inclined tower column steel formwork according to claim 1, characterized in that, The ratio of the track length to the trolley length is greater than or equal to 600:

1.

4. A monitoring method of a deformation monitoring device using the inclined pylon steel formwork according to any one of claims 1 to 3, characterized in that, Comprising: a. Taking the center point of the traveling trolley as the measuring point, when the formwork is not loaded and the external environment is not disturbed, the traveling trolley travels on the track, and the pull - rope displacement encoder can obtain the displacement value; wherein, when the trolley moves to the position where the pull - rope of the pull - rope displacement encoder is horizontal, at this time the horizontal distance is L0, the angle measured by the angle measuring instrument is 0 rad, at this time taking the measuring point as the origin O of the rectangular coordinate system, along the inclined direction of the formwork as the x - axis, the normal direction of the formwork as the y - axis, and the inclination angle of the formwork is θ; b. Each time concrete is poured, the traveling trolley travels on the track once, and according to the detection values of the pull - rope displacement encoder and the angle measurement encoder when the trolley travels on the track, calculate the coordinates of the measuring point on the x - axis and y - axis, and draw the deformation curve of the formwork according to the measuring point coordinates.

5. The deformation monitoring device and monitoring method for the inclined tower column steel formwork according to claim 4, characterized in that, The acquisition of the measuring point coordinates and the deformation curve of the formwork is specifically as follows: Compile the calculation of the measuring point coordinates and the deformation curve of the formwork into a program and store it on a storage medium; Each time the trolley travels, the controller receives the information of the pull - rope displacement encoder and the angle measurement encoder, and calls and processes the program in the storage medium to calculate the measuring point coordinates and the formwork deformation curve.

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