WO2023029216A1 - Method for manufacturing high-precision and ultra-long standard wire of main cable strand of suspension bridge - Google Patents

Method for manufacturing high-precision and ultra-long standard wire of main cable strand of suspension bridge Download PDF

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WO2023029216A1
WO2023029216A1 PCT/CN2021/130505 CN2021130505W WO2023029216A1 WO 2023029216 A1 WO2023029216 A1 WO 2023029216A1 CN 2021130505 W CN2021130505 W CN 2021130505W WO 2023029216 A1 WO2023029216 A1 WO 2023029216A1
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wire
standard
length
marking
standard wire
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PCT/CN2021/130505
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French (fr)
Chinese (zh)
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赵军
薛花娟
强强
周能作
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江苏法尔胜缆索有限公司
江苏法尔胜路桥科技有限公司
法尔胜泓昇集团有限公司
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Publication of WO2023029216A1 publication Critical patent/WO2023029216A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration

Definitions

  • the invention relates to a method for making standard wires in bridge construction cable strands, in particular to a method for manufacturing standard wires for super-long main cable strands.
  • the weight data given in the design including the weight of the large cable, the modulus of elasticity, the weight of each section of the stiffening beam, the weight of the deck system, and the weight of the sling , Cable clip weight, etc. Then, through the mid-span sag given by the design, the relative coordinate positions of the two ends of the mid-span, the position of the cable clamp, etc., the position of each point, the internal force of the main cable, the length of the unstressed cable, etc. are calculated by the program.
  • the blanking length of the cable manufacturing unit includes the unstressed blanking length of each strand and the marking point of each span.
  • the marking point of the middle span is the vertical truncation of the two main saddles.
  • the marked point of the side span is at the tangent point of the scatter saddle.
  • the cable length marked in the suspension bridge monitoring instruction is the cable length under the unstressed condition, and the steel wire and cable strands cannot be accurately measured and marked under the unstressed condition. Therefore, generally a standard length steel wire (referred to as standard wire) needs to be set in the upper right corner of the main cable strand, and a certain tension is applied to the standard length steel wire, and then the main span mid-span, side span mid-span, and main span are provided by the monitoring command. Mark the length under stress at the cable saddle, loose cable saddle, anchor point and other positions.
  • the standard wire error accounts for about 80% of the cable strand error control. Therefore, to control the length accuracy of the cable strand, it is first necessary to control the length accuracy of the standard wire.
  • the production of the standard wire is to select the steel wire for making the strand and place it on the roller bracket, one end is fixed, and the other end is stressed by a gravity weight, and then under the stress condition (room temperature) according to the unstressed length of the monitoring instruction (design temperature, generally 15°C) is marked by the stress length converted according to the following formula.
  • L is the marked length of the standard wire under stress
  • L 0 is the marked length of the standard wire under no stress state (provided by monitoring).
  • ⁇ L 1 is the elastic elongation correction of the standard wire, which is related to the elastic modulus, diameter and tension of the standard wire;
  • ⁇ L 2 is the temperature correction, which is related to the thermal expansion coefficient and temperature of the standard wire;
  • ⁇ L 3 is the sag correction between the standard wire roller brackets.
  • the factors affecting the production accuracy of standard wire include the deviation of elastic modulus of standard wire, the deviation of standard wire diameter, the error of tension, the weight of steel wire, the dispersion of temperature, the error of roller spacing, etc.
  • the production of standard wire is to correct the unstressed length by stress and temperature, and mark the standard length steel wire under the stress state.
  • the modified calculation theory is generally based on the following basic assumptions: (1) the standard steel wire is ideally flexible, and the bending stiffness of the steel wire is negligible; (2) the standard wire material conforms to Hooke's law.
  • the change of elastic modulus directly affects the unstressed length of the standard wire.
  • the elastic modulus of the standard wire is 200,000MPa as the reference value. Assuming that the actual elastic modulus of the standard wire is greater than the reference value, the elastic elongation of the standard wire is inversely proportional to the elastic modulus under the condition of constant load and unstressed length.
  • the actual elastic modulus is greater than the reference value
  • the actual elastic elongation of the standard wire under stress is less than the reference value, and the corresponding unstressed length of the standard wire is greater than the reference value; when the actual elastic modulus is smaller than the reference value, the actual elastic elongation The length is greater than the reference value, and the stress-free length of the corresponding standard wire is less than the reference value.
  • Variations in the gauge wire diameter (area) also affect the unstressed length of the gauge wire.
  • the standard wire is based on the nominal diameter (area) of the steel wire.
  • the elastic elongation of the standard wire is the same as that of the steel wire.
  • the diameter (area) is inversely proportional, that is, the actual elastic modulus is greater than the reference value, then the actual elastic elongation of the standard wire under stress is less than the reference value, and the unstressed length of the corresponding standard wire is greater than the reference value; the actual steel wire diameter (area) When it is less than the reference value, the actual elastic elongation is greater than the reference value, and the stress-free length of the corresponding standard wire is less than the reference value.
  • the above two errors account for more than 45% of the manufacturing error of the standard wire, which greatly affects the length accuracy of the main cable strand.
  • the present invention proposes a method that eliminates the length error caused by the elastic modulus and diameter deviation of the reference wire and the standard wire, improves the length accuracy of the standard wire, and improves the length accuracy of the main cable strands of the long-span suspension bridge.
  • the marking method is to spray two colors of paint along the length direction of the steel wire at the marking point, and the paint dividing line is used as the standard wire marking control section;
  • (2.2) Move the above wire used to make standard wire into the production workshop, let it stand still, and unfold it on the standard wire pedestal, measure the temperature of the head and tail of the unfolded wire and any point in the middle. It is required that the temperature of the wire is not discrete. Greater than 1°C, the temperature dispersion refers to the difference between the highest measured temperature and the lowest measured temperature among the measured temperatures;
  • the current section of the standard wire on the pedestal is compared and marked according to the marking points on the reference wire.
  • the marking method is to spray two colors of paint along the length of the wire at the marked position.
  • the paint boundary is the standard wire marking control section.
  • the diameter deviation of the wire is not greater than 0.02mm.
  • the base of the reference wire includes a fixed base arranged in sequence, a plurality of roller support bases, and a fixed pulley base, and the initial end of the wire is fixed on the fixed base, and then supported on multiple
  • the roller support pedestal is finally turned by the fixed pulley on the fixed pulley pedestal, and the roller support pedestal supports the wire material through the roller.
  • the marking points corresponding to the segment marking length include end points, scatter saddle points, side span midpoints, tower top saddle points, and main span midpoints.
  • step (1.6) the weight of the fixed pulley is used to load the end of the wire.
  • the self-weight of the wire material and the ruler causes the wire material and the ruler to sag between the two roller support points respectively, and the steel wire and the ruler should be dealt with when measuring the segmented marking length. sag difference correction.
  • step (2.1) the elastic modulus and diameter of the wire head and tail and any number of positions in the middle are measured, and the average value of the measurement results must meet the standard elastic modulus and standard diameter requirements.
  • the standard wire manufacturing method of the present application eliminates the length error caused by the elastic modulus and diameter deviation between the reference wire and the standard wire, and improves the length accuracy of the standard wire.
  • Fig. 1 is a schematic diagram of standard silk marking points in the embodiment of the present invention.
  • Fig. 2 is a schematic diagram of the reference wire marking points in the embodiment of the present invention.
  • Fig. 3 is a schematic diagram of making a reference wire in an embodiment of the present invention.
  • Fig. 4 is a schematic diagram of reference wire and ruler sag
  • Fig. 5 is a schematic diagram of making a standard wire in an embodiment of the present invention.
  • Fig. 6 is the side view of the roller pedestal in the process of making the standard wire in the embodiment of the present invention.
  • Fig. 7 is a schematic diagram of the standard silk marking method in the embodiment of the present invention.
  • fixed pedestal 1 roller support pedestal 2
  • fixed pulley pedestal 3 weight 4
  • steel wire 5 steel tape measure 6
  • reference wire 7 standard wire 8.
  • the first step making ultra-high-precision reference wire
  • the standard wire Before making the standard wire, first make a 350-meter-long reference wire with a steel wire made of the same material as the standard wire. Before making the reference wire, the elastic modulus and diameter of the steel wire head and tail are measured, and the steel wire whose elastic modulus is the designed standard elastic modulus and steel wire diameter is the designed nominal steel wire diameter is selected for the production of the reference wire. The elastic modulus and diameter of the above steel wires need to be measured head to tail, and the measurement results all meet the standard elastic modulus and standard diameter requirements, and the diameter deviation is not greater than 0.02mm.
  • the main cable strand marking requirements given by the monitoring unit it is converted into a reference wire length mark, and the segmental mark position of the reference wire is determined.
  • segmental mark lengths such as end points, loose cable saddle points, side spans The saddle point on the top of the tower, the mid-span point of the main span, etc.
  • the total length of the cable strand is about 4500m.
  • the west end point of the cable strand is point 0; the saddle point of the west span is point 1; the middle point of the west span is point 2; the saddle point of the west tower is point 3; the middle point of the main span is point 4; The saddle point is point 5; the middle point of the east span is point 6; the saddle point of the east-scattering cable is point 7; the end point of the east side is point 8.
  • section length hire a third-party professional organization to use a total station to calibrate the baseline section length of the reference wire, and after review, ensure that the length of the reference wire is consistent with the length of the section mark.
  • the marking method is to spray two colors of paint along the length direction of the steel wire at the marking position, and the dividing line of the paint is the standard wire marking control section.
  • the second step making ultra-high precision standard wire
  • the standard wire is compared and marked according to the marking points on the reference wire.
  • the marking method is to spray two colors of paint along the length of the steel wire at the marked position, and the dividing line of the paint is the standard wire marking control section.
  • the standard wire is equal to the length of the cable strand, and the marking points that need to be made within each 350m length are found for transfer. As shown in Figure 6.

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Abstract

A method for manufacturing a high-precision and ultra-long standard wire (8) of a main cable strand of a suspension bridge, the method comprising the manufacturing of a reference wire (7): converting mark requirements of a main cable strand into length marks on multiple reference wires (7); numbering a mark point corresponding to each segment mark length; and marking, in a projection manner, one reference wire (7) with all the mark points on the multiple reference wires (7). The method further comprises the manufacturing of a standard wire (8): on a pedestal, making the reference wire (7) and the standard wire (8) achieve the same stress state by means of weight loading; during marking, the position of the reference wire (7) remaining unchanged, the standard wire (8) and a main cable strand having an equal length, dividing the standard wire (8) into several segments, each of which have a length equal to that of the reference wire (7), sequentially marking the several segments of the standard wire (8) with reference to the serial numbers of the mark points on the reference wire (7), and moving to the next segment after a segment has been marked; and sequentially completing the manufacturing of the whole standard wire (8). The method eliminates a length error caused by the elastic modulus and diameter deviations of a reference wire (7) and a standard wire (8), thereby improving the length precision of the standard wire (8).

Description

一种高精度超长悬索桥主缆索股标准丝的制作方法A manufacturing method of high-precision ultra-long suspension bridge main cable strand standard wire 技术领域technical field
本发明涉及桥梁建筑缆索索股中标准丝的制作方法，尤其涉及超长主缆索股标准丝的制作方法。The invention relates to a method for making standard wires in bridge construction cable strands, in particular to a method for manufacturing standard wires for super-long main cable strands.
背景技术Background technique
悬索桥主缆索股施工监控时，首先需要把设计中给出的重量数据统计出来，包括大缆的重度、弹性模量、加劲梁每段的重量、还有桥面系的重量、吊索的重度、索夹重量等。然后通过设计给出的中跨垂度、中跨两端的相对坐标位置，索夹位置等，用程序计算出各点的位置，主缆的内力，无应力索长等。计算了中跨基准股以后再计算边跨的基准股，然后计算锚跨的基准股，再对主索鞍和散索鞍进行基准股的修正，最后对每根股的位置进行修正。最终得到每根丝股的长度，其中要给缆索制作单位的下料长度包括每根索股的无应力下料长度以及每跨的标记点，中跨的标记点是两个主索鞍垂直截断的位置，边跨的标记点在散索鞍的切点处。悬索桥监控指令中标注的索长为无应力状况下的索长，而钢丝和索股在无应力状况下无法准确测长标记。因此一般在主缆索股的右上角需要设置一根标准长度钢丝(简称标准丝)，在该标准长度钢丝上施加一定的张力，然后在监控指令提供的主跨跨中、边跨跨中、主索鞍、散索鞍、锚固点等位置进行应力下的长度标记。When monitoring the construction of the main cable strands of a suspension bridge, it is first necessary to calculate the weight data given in the design, including the weight of the large cable, the modulus of elasticity, the weight of each section of the stiffening beam, the weight of the deck system, and the weight of the sling , Cable clip weight, etc. Then, through the mid-span sag given by the design, the relative coordinate positions of the two ends of the mid-span, the position of the cable clamp, etc., the position of each point, the internal force of the main cable, the length of the unstressed cable, etc. are calculated by the program. After calculating the benchmark strands of the mid-span, calculate the benchmark strands of the side span, then calculate the benchmark strands of the anchor span, then modify the benchmark strands of the main cable saddle and loose cable saddle, and finally correct the position of each strand. Finally, the length of each wire strand is obtained. The blanking length of the cable manufacturing unit includes the unstressed blanking length of each strand and the marking point of each span. The marking point of the middle span is the vertical truncation of the two main saddles. , the marked point of the side span is at the tangent point of the scatter saddle. The cable length marked in the suspension bridge monitoring instruction is the cable length under the unstressed condition, and the steel wire and cable strands cannot be accurately measured and marked under the unstressed condition. Therefore, generally a standard length steel wire (referred to as standard wire) needs to be set in the upper right corner of the main cable strand, and a certain tension is applied to the standard length steel wire, and then the main span mid-span, side span mid-span, and main span are provided by the monitoring command. Mark the length under stress at the cable saddle, loose cable saddle, anchor point and other positions.
通过以往建成的悬索桥工程计算分析可知，标准丝误差占索股误差控制中约为80％，因此，控制索股长度精度首先需要控制标准丝制作的长度精度。标准丝的制作是选取制作索股的钢丝放置在滚轮支架上，一端固定，一端通过重力式砝码施加应力，然后在应力条件下(室温)按照监控指令的无应力长度(设计温度，一般为15℃)按照下式转换的应力长度进行标记。According to the calculation and analysis of the suspension bridge projects built in the past, the standard wire error accounts for about 80% of the cable strand error control. Therefore, to control the length accuracy of the cable strand, it is first necessary to control the length accuracy of the standard wire. The production of the standard wire is to select the steel wire for making the strand and place it on the roller bracket, one end is fixed, and the other end is stressed by a gravity weight, and then under the stress condition (room temperature) according to the unstressed length of the monitoring instruction (design temperature, generally 15°C) is marked by the stress length converted according to the following formula.
L＝L 0+△L 1+△L 2-△L 3 L＝L 0 +△L 1 +△L 2 -△L 3
其中L为标准丝在应力下的标记长度；Where L is the marked length of the standard wire under stress;
L 0为标准丝无应力状态下的标记长度(监控提供)； L 0 is the marked length of the standard wire under no stress state (provided by monitoring);
△L 1为标准丝的弹性伸长修正，与标准丝的弹性模量、直径和拉力等有关； △L 1 is the elastic elongation correction of the standard wire, which is related to the elastic modulus, diameter and tension of the standard wire;
△L 2为温度修正，与标准丝的热膨胀系数及温度有关； △L 2 is the temperature correction, which is related to the thermal expansion coefficient and temperature of the standard wire;
△L 3为标准丝滚轮支架间的垂度修正。 △L 3 is the sag correction between the standard wire roller brackets.
从以上可知，影响标准丝制作精度的因素包括标准丝的弹性模量偏差、标准丝直径偏差、拉力误差、钢丝自重、温度离散、滚轮间距误差等有关。标准丝的制作是将无应力长度经过应力和温度修正，在应力状态下对标准长度钢丝进行标记。其修正计算理论一般都建立在以下基本假设的基础上：(1)标准钢丝是理想柔性的，钢丝的抗弯刚度忽略不计；(2)标准丝材料符合胡克定律。即材料正常工作范围内应力与应变呈线性关系；(3)荷载作用下钢丝横截面产生的变形与其截面积相比很小，计算中忽略钢丝横截面面积的改变。From the above, it can be seen that the factors affecting the production accuracy of standard wire include the deviation of elastic modulus of standard wire, the deviation of standard wire diameter, the error of tension, the weight of steel wire, the dispersion of temperature, the error of roller spacing, etc. The production of standard wire is to correct the unstressed length by stress and temperature, and mark the standard length steel wire under the stress state. The modified calculation theory is generally based on the following basic assumptions: (1) the standard steel wire is ideally flexible, and the bending stiffness of the steel wire is negligible; (2) the standard wire material conforms to Hooke's law. That is, the stress and strain in the normal working range of the material have a linear relationship; (3) The deformation of the cross-section of the steel wire under load is small compared with its cross-sectional area, and the change of the cross-sectional area of the steel wire is ignored in the calculation.
由于标准丝是在应力下进行标记，根据胡克定律，弹性模量的变化直接影响标准丝的无应力长度。目前，标准丝均以弹模200000MPa为基准值，假设标准丝的实际弹模大于基准值，在荷载及无应力长度不变的情况下，标准丝的的弹性伸长量与弹性模量成反比，即实际弹性模量大于基准值，那么应力下的标准丝的实际弹性伸长量小于基准值，相应的标准丝的无应力长度大于基准值；实际弹性模量小于基准值时，实际弹性伸长量则大于基准值，相应的标准丝的无应力长度小于基准值。标准丝直径(面积)的变化也会影响标准丝的无应力长度。目前，标准丝均以钢丝公称直径(面积)为基准值，假设标准丝的实际直径(面积)大于基准值，在荷载及无应力长度不变的情况下，标准丝的弹性伸长量与钢丝直径(面积)成反比，即实际弹性模量大于基准值，那么应力下的标准丝的实际弹性伸长量小于基准值，相应的标准丝的无应力长度大于基准值；实际钢丝直径(面积)小于基准值时，实际弹性伸长量则大于基准值，相应的标准丝的无应力长度小于基准值。以上两项误差在标准丝的制作误差中占比达到45％以上，大大影响了主缆索股的长度精度。Since the standard wire is marked under stress, according to Hooke's law, the change of elastic modulus directly affects the unstressed length of the standard wire. At present, the elastic modulus of the standard wire is 200,000MPa as the reference value. Assuming that the actual elastic modulus of the standard wire is greater than the reference value, the elastic elongation of the standard wire is inversely proportional to the elastic modulus under the condition of constant load and unstressed length. , that is, the actual elastic modulus is greater than the reference value, then the actual elastic elongation of the standard wire under stress is less than the reference value, and the corresponding unstressed length of the standard wire is greater than the reference value; when the actual elastic modulus is smaller than the reference value, the actual elastic elongation The length is greater than the reference value, and the stress-free length of the corresponding standard wire is less than the reference value. Variations in the gauge wire diameter (area) also affect the unstressed length of the gauge wire. At present, the standard wire is based on the nominal diameter (area) of the steel wire. Assuming that the actual diameter (area) of the standard wire is greater than the reference value, under the condition that the load and unstressed length remain unchanged, the elastic elongation of the standard wire is the same as that of the steel wire. The diameter (area) is inversely proportional, that is, the actual elastic modulus is greater than the reference value, then the actual elastic elongation of the standard wire under stress is less than the reference value, and the unstressed length of the corresponding standard wire is greater than the reference value; the actual steel wire diameter (area) When it is less than the reference value, the actual elastic elongation is greater than the reference value, and the stress-free length of the corresponding standard wire is less than the reference value. The above two errors account for more than 45% of the manufacturing error of the standard wire, which greatly affects the length accuracy of the main cable strand.
发明内容Contents of the invention
为了解决以上问题，本发明提出了一种消除了基准丝和标准丝弹性模量和直径偏差引起的长度误差的方法，提高标准丝的长度精度，提高大跨径悬索桥主缆索股的长度精度。In order to solve the above problems, the present invention proposes a method that eliminates the length error caused by the elastic modulus and diameter deviation of the reference wire and the standard wire, improves the length accuracy of the standard wire, and improves the length accuracy of the main cable strands of the long-span suspension bridge.
本发明的技术方案：一种高精度超长悬索桥主缆索股标准丝的制作方法，包括Technical solution of the present invention: a method for making a high-precision ultra-long suspension bridge main cable strand standard wire, comprising:
(一)基准丝的制作(1) Preparation of reference wire
(1.1)在制作标准丝之前，先采用与标准丝相同材料的丝材制作一根m米长度的基准丝，正式制作基准丝之前，对丝材头尾端的弹性模量和直径进行测量，测量结果均达到设计的丝材标准弹性模量和标准直径要求；(1.1) Before making the standard wire, first use the wire material of the same material as the standard wire to make a reference wire with a length of m meters. Before making the reference wire formally, measure the elastic modulus and diameter of the head and tail of the wire. The results all meet the requirements of the designed wire standard elastic modulus and standard diameter;
(1.2)将以上用于制作基准丝的丝材移入制作车间，静置，展开在基准丝台座上，测量展开后的丝材头尾端以及中间任意点的温度，要求丝材的温度离散不大于1℃，所述温度离散是指测量的温度中最高测量温度和最低测量温度之差；(1.2) Move the above wire used to make the reference wire into the production workshop, let it stand still, and unfold it on the reference wire stand, measure the temperature of the head, tail and any point in the middle of the unfolded wire, and the temperature of the wire is required to be discrete. Greater than 1°C, the temperature dispersion refers to the difference between the highest measured temperature and the lowest measured temperature among the measured temperatures;
(1.3)根据主缆索股标记要求，转化为多段基准丝上的长度标记，该要求中分段标记长度有很多段，根据分段标记长度确定各基准丝分段标记位置；(1.3) According to the marking requirements of the main cable strands, it is converted into a length mark on the multi-section reference wire. In this requirement, there are many segments in the length of the segment mark, and the position of the segment mark of each reference wire is determined according to the length of the segment mark;
(1.4)对各分段标记长度对应的标记点进行编号，将多段基准丝上的全部标记点按照投影的方式标记在一根基准丝上；(1.4) Number the marking points corresponding to the marking lengths of each segment, and mark all the marking points on the multi-section reference wire on one reference wire in the way of projection;
(1.5)根据分段标记长度，用全站仪标定基准丝基线分段长度，并经复核，确保该基准丝基线分段长度与对应的分段标记长度一致；(1.5) Use a total station to calibrate the segment length of the baseline of the reference silk according to the length of the segment mark, and check to ensure that the segment length of the baseline of the reference silk is consistent with the length of the corresponding segment mark;
(1.6)将丝材一端固定，在丝材末端加载提高测量丝材的直线度，给钢丝加载使基准丝材达到恒应力状态；(1.6) Fix one end of the wire, load the end of the wire to improve the straightness of the measured wire, and load the steel wire so that the reference wire reaches a constant stress state;
(1.7)采用测距仪和尺的组合在丝材上进行测量和标记；(1.7) Use a combination of distance meter and ruler to measure and mark on the wire;
(1.8)在各标记点进行长度标记，标记方式是在标记处沿钢丝长度方向喷涂两种颜色油漆，油漆分界线作为标准丝标记控制截面；(1.8) Carry out length marking at each marking point. The marking method is to spray two colors of paint along the length direction of the steel wire at the marking point, and the paint dividing line is used as the standard wire marking control section;
(二)标准丝的制作(2) Production of standard wire
(2.1)制作标准丝之前，选取与基准丝弹性模量和直径相同的丝材用于标准丝的制作；(2.1) Before making the standard wire, select the wire material with the same elastic modulus and diameter as the reference wire for making the standard wire;
(2.2)将以上用于制作标准丝的丝材移入制作车间，静置，展开在标准丝台座上，测量展开后的丝材头尾端以及中间任意点的温度，要求丝材的温度离散不大于1℃，所述温度离散是指测量的温度中最高测量温度和最低测量温度之差；(2.2) Move the above wire used to make standard wire into the production workshop, let it stand still, and unfold it on the standard wire pedestal, measure the temperature of the head and tail of the unfolded wire and any point in the middle. It is required that the temperature of the wire is not discrete. Greater than 1°C, the temperature dispersion refers to the difference between the highest measured temperature and the lowest measured temperature among the measured temperatures;
(2.3)在台座上对基准丝、标准丝末端加载，加载载荷相同，使基准丝、标准丝达到相同的应力状态；(2.3) Load the ends of the reference wire and standard wire on the pedestal with the same load, so that the reference wire and standard wire reach the same stress state;
(2.4)台座上当前段标准丝依据基准丝上的标记点进行对比标记，标记方式是在标记处沿丝材长度方向喷涂两种颜色油漆，油漆分界线为标准丝标记控制截面，制作时， 基准丝位置不变，标准丝与索股主缆等长，将标准丝分成若干与基准丝等长的若干段，参照基准丝上标记点的序号顺次在若干段的标准丝上进行标记，每标记完一段转移至下一段；(2.4) The current section of the standard wire on the pedestal is compared and marked according to the marking points on the reference wire. The marking method is to spray two colors of paint along the length of the wire at the marked position. The paint boundary is the standard wire marking control section. During production, The position of the reference wire remains unchanged, the standard wire is equal to the length of the cable strand main cable, the standard wire is divided into several sections of the same length as the reference wire, and marks are made on several sections of the standard wire in sequence referring to the serial numbers of the marking points on the reference wire. Move to the next paragraph after marking each paragraph;
(2.5)对以上标记进行检查，检查无误后将当前段标准丝卷起，开始下一段标准丝的制作，依次完成整卷标准丝的制作；(2.5) Check the above marks, roll up the current section of standard wire after the inspection is correct, start the production of the next section of standard wire, and complete the production of the whole roll of standard wire in turn;
(2.6)将制作完的标准丝盘卷、标识、包装好后储存备用；(2.6) Store the finished standard wire coils, labels, and packages for later use;
(2.7)用同样方法制作下一根标准丝。(2.7) Use the same method to make the next standard wire.
优选地，步骤(1.1)中，丝材的直径偏差不大于0.02mm。Preferably, in step (1.1), the diameter deviation of the wire is not greater than 0.02mm.
优选地，步骤(1.2)中，所述基准丝台座包括顺次布置的固定台座、多个滚轮支撑台座、定滑轮台座，丝材的起始端固定于所述固定台座，然后依次支撑于多个所述滚轮支撑台座，最后通过所述定滑轮台座上的定滑轮转向，所述滚轮支撑台座通过滚轮对丝材形成支撑。Preferably, in step (1.2), the base of the reference wire includes a fixed base arranged in sequence, a plurality of roller support bases, and a fixed pulley base, and the initial end of the wire is fixed on the fixed base, and then supported on multiple The roller support pedestal is finally turned by the fixed pulley on the fixed pulley pedestal, and the roller support pedestal supports the wire material through the roller.
优选地，步骤(1.3)中，分段标记长度对应的标记点包括端点、散索鞍点、边跨跨中点、塔顶鞍座点、主跨跨中点。Preferably, in step (1.3), the marking points corresponding to the segment marking length include end points, scatter saddle points, side span midpoints, tower top saddle points, and main span midpoints.
优选地，步骤(1.6)中，采用定滑轮砝码在丝材末端加载。Preferably, in step (1.6), the weight of the fixed pulley is used to load the end of the wire.
优选地，在步骤(一)中，在丝材标记过程中，丝材和尺的自重使丝材和尺各自在两滚轮支撑点之间产生下垂，在分段标记长度测量时应对钢丝与尺的垂度差修正。Preferably, in step (1), in the wire material marking process, the self-weight of the wire material and the ruler causes the wire material and the ruler to sag between the two roller support points respectively, and the steel wire and the ruler should be dealt with when measuring the segmented marking length. sag difference correction.
优选地，步骤(2.1)中，对丝材头尾及中间任意多个位置的弹性模量和直径进行测量，测量结果平均值均需达到标准弹性模量和标准直径要求。Preferably, in step (2.1), the elastic modulus and diameter of the wire head and tail and any number of positions in the middle are measured, and the average value of the measurement results must meet the standard elastic modulus and standard diameter requirements.
本申请的标准丝制作方法消除了基准丝和标准丝弹性模量和直径偏差引起的长度误差，提高了标准丝的长度精度。The standard wire manufacturing method of the present application eliminates the length error caused by the elastic modulus and diameter deviation between the reference wire and the standard wire, and improves the length accuracy of the standard wire.
附图说明Description of drawings
图1为本发明实施例中标准丝标记点示意图；Fig. 1 is a schematic diagram of standard silk marking points in the embodiment of the present invention;
图2为本发明实施例中基准丝标记点示意图；Fig. 2 is a schematic diagram of the reference wire marking points in the embodiment of the present invention;
图3为本发明实施例中基准丝制作示意图；Fig. 3 is a schematic diagram of making a reference wire in an embodiment of the present invention;
图4为基准丝和尺垂度示意图；Fig. 4 is a schematic diagram of reference wire and ruler sag;
图5为本发明实施例中标准丝制作示意图；Fig. 5 is a schematic diagram of making a standard wire in an embodiment of the present invention;
图6为本发明实施例中标准丝制作过程中滚轮台座的侧视图；Fig. 6 is the side view of the roller pedestal in the process of making the standard wire in the embodiment of the present invention;
图7为本发明实施例中标准丝标记方式示意图；Fig. 7 is a schematic diagram of the standard silk marking method in the embodiment of the present invention;
图中，固定台座1、滚轮支撑台座2、定滑轮台座3、砝码4、钢丝5、钢卷尺6、基准丝7、标准丝8。Among the figure, fixed pedestal 1, roller support pedestal 2, fixed pulley pedestal 3, weight 4, steel wire 5, steel tape measure 6, reference wire 7, standard wire 8.
具体实施方式Detailed ways
以下结合附图对本发明作进一步详细描述，所述实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。本实施例中的文字描述是与附图对应的，涉及方位的描述也是基于附图的描述，不应理解为是对本发明保护范围的限制。The present invention will be further described in detail below in conjunction with the accompanying drawings. The embodiments are exemplary and intended to explain the present invention, but should not be construed as limitations on the present invention. The text descriptions in this embodiment correspond to the accompanying drawings, and the descriptions related to orientation are also based on the accompanying drawings, and should not be construed as limiting the protection scope of the present invention.
具体实施方案：Specific implementation plan:
第一步：制作超高精度基准丝The first step: making ultra-high-precision reference wire
1)在制作标准丝之前，先采用与标准丝等材料的钢丝制作一根350米长度的基准丝。制作基准丝之前，对钢丝头尾的弹性模量和直径进行测量，挑选弹性模量为设计的标准弹性模量、钢丝直径为设计的公称钢丝直径的钢丝用于基准丝的制作。以上钢丝的弹性模量和直径需要头尾进行测量，测量结果均达到标准弹性模量和标准直径要求，直径偏差不大于0.02mm。1) Before making the standard wire, first make a 350-meter-long reference wire with a steel wire made of the same material as the standard wire. Before making the reference wire, the elastic modulus and diameter of the steel wire head and tail are measured, and the steel wire whose elastic modulus is the designed standard elastic modulus and steel wire diameter is the designed nominal steel wire diameter is selected for the production of the reference wire. The elastic modulus and diameter of the above steel wires need to be measured head to tail, and the measurement results all meet the standard elastic modulus and standard diameter requirements, and the diameter deviation is not greater than 0.02mm.
2)将以上用于制作基准丝的钢丝移入制作车间，放置两天以上，展开在基准丝台座上，测量展开后的钢丝头中尾的温度，要求其温度离散(最高温度-最低温度)不大于1度。2) Move the above steel wire used for making reference wire into the production workshop, place it for more than two days, unfold it on the base of reference wire, measure the temperature of the middle and tail of the steel wire after unfolding, and require that the temperature dispersion (maximum temperature - minimum temperature) is not greater than 1 degree.
3)根据监控单位给出的主缆索股标记要求，转化为基准丝长度标记，确定基准丝分段标记位置，分段标记长度有很多段，如端点、散索鞍点、边跨跨中点、塔顶鞍座点、主跨跨中点等。3) According to the main cable strand marking requirements given by the monitoring unit, it is converted into a reference wire length mark, and the segmental mark position of the reference wire is determined. There are many segmental mark lengths, such as end points, loose cable saddle points, side spans The saddle point on the top of the tower, the mid-span point of the main span, etc.
4)以某座悬索桥主缆索股为例，索股总长度约4500m。索股西侧端点为0号点；西散索鞍点为1号点；西边跨跨中点为2号点；西塔索鞍点为3号点；主跨跨中点为4号点；东塔索鞍点为5号点；东边跨跨中点为6号点；东散索鞍点为7号点；索股东侧端点为8号点。4) Taking the main cable strand of a suspension bridge as an example, the total length of the cable strand is about 4500m. The west end point of the cable strand is point 0; the saddle point of the west span is point 1; the middle point of the west span is point 2; the saddle point of the west tower is point 3; the middle point of the main span is point 4; The saddle point is point 5; the middle point of the east span is point 6; the saddle point of the east-scattering cable is point 7; the end point of the east side is point 8.
各个标记点在标准丝上的分布如图1所示。The distribution of each marking point on the standard wire is shown in Figure 1.
将这些分布在4500米范围内的标记点集中做在基准丝上(350m之内)，基准丝上的标记点分布如图2所示。These marking points distributed within the range of 4500 meters are concentrated on the reference wire (within 350m), and the distribution of marking points on the reference wire is shown in Figure 2.
5)根据分段长度，聘请第三方专业机构用全站仪标定基准丝基线分段长度，并经复核，确保该基准丝长度与分段标记长度一致。5) According to the section length, hire a third-party professional organization to use a total station to calibrate the baseline section length of the reference wire, and after review, ensure that the length of the reference wire is consistent with the length of the section mark.
6)采用定滑轮砝码系统在钢丝末端加载，为了提高测量钢丝的直线度，给钢丝加载，加载载荷为50kg，定滑轮砝码系统使基准钢丝达到恒应力状态，如图3所示。6) Use the fixed pulley weight system to load at the end of the steel wire. In order to improve the straightness of the steel wire for measurement, load the steel wire with a load of 50kg. The fixed pulley weight system makes the reference steel wire reach a constant stress state, as shown in Figure 3.
7)在以上标记过程中，由于钢丝和钢卷尺自重影响，需考虑钢丝与钢卷尺之间的垂度差修正，如图4所示。7) In the above marking process, due to the influence of the self-weight of the steel wire and the steel tape, it is necessary to consider the correction of the sag difference between the steel wire and the steel tape, as shown in Figure 4.
8)采用激光测距仪和钢卷尺组合进行测量和标记。8) Use a combination of laser range finder and steel tape for measurement and marking.
9)在各标记点进行长度标记。标记方式是在标记处沿钢丝长度方向，喷涂两种颜色油漆，油漆分界线为标准丝标记控制截面。9) Perform length marking at each marking point. The marking method is to spray two colors of paint along the length direction of the steel wire at the marking position, and the dividing line of the paint is the standard wire marking control section.
10)将以上标记好的钢丝在加载状态下作为基准丝放置在台座上。10) Place the above-marked steel wire on the pedestal as a reference wire in the loaded state.
第二步：制作超高精度标准丝The second step: making ultra-high precision standard wire
1)制作标准丝之前，对钢丝头尾的弹性模量和直径进行测量，选取与基准丝弹性模量和直径相同的钢丝用于标准丝丝的制作。以上钢丝的弹性模量和直径需要头尾进行测量，测量结果平均值均需达到标准弹性模量(如2.0x10 5MPa)和标准直径(6.00mm)要求。 1) Before making the standard wire, measure the elastic modulus and diameter of the steel wire head and tail, and select the steel wire with the same elastic modulus and diameter as the reference wire for the production of the standard wire. The elastic modulus and diameter of the above steel wires need to be measured from head to tail, and the average value of the measurement results must meet the requirements of standard elastic modulus (such as 2.0x10 5 MPa) and standard diameter (6.00mm).
2)将以上用于制作标准丝的钢丝移入制作车间，放置两天以上，展开在标准丝台座上，测量展开后的钢丝头中尾的温度，要求其与基准丝(头中尾温度温度平均值)温度离散不大于1度。2) Move the above steel wire used for making standard wire into the production workshop, place it for more than two days, spread it on the standard wire stand, measure the temperature of the head, middle and tail of the unfolded steel wire, and ask it to be the same as the reference wire (the average temperature of the head, middle and tail) The temperature dispersion is not greater than 1 degree.
3)将基准丝、标准丝末端加载，加载载荷为50kg，使基准丝、标准丝达到相同的应力状态。如图5所示。3) Load the end of the reference wire and standard wire with a load of 50kg, so that the reference wire and standard wire reach the same stress state. As shown in Figure 5.
4)标准丝依据基准丝上的标记点进行对比标记，标记方式是在标记处沿钢丝长度方向，喷涂两种颜色油漆，油漆分界线为标准丝标记控制截面。制作时，基准丝位置不变标准丝与索股等长，找到每个350m长度内需要制作的标记点进行转移。如图6所示。4) The standard wire is compared and marked according to the marking points on the reference wire. The marking method is to spray two colors of paint along the length of the steel wire at the marked position, and the dividing line of the paint is the standard wire marking control section. During production, the position of the reference wire remains unchanged. The standard wire is equal to the length of the cable strand, and the marking points that need to be made within each 350m length are found for transfer. As shown in Figure 6.
5)对以上标记进行检查，检查无误后将以上标准丝卷起，开始下一段标准丝的制作。依次完成整卷标准丝的制作。5) Check the above marks, and roll up the above standard wire after the inspection is correct, and start the production of the next section of standard wire. Complete the production of the whole roll of standard wire in turn.
6)将制作完的标准丝盘卷、标识、包装好后储存备用。6) After the finished standard wire coils are coiled, marked and packaged, they are stored for later use.
7)用同样方法制作下一根标准丝。7) Make the next standard wire in the same way.
传统基准丝的误差Errors of Traditional Fiducial Wires
Figure PCTCN2021130505-appb-000001
Figure PCTCN2021130505-appb-000001
Figure PCTCN2021130505-appb-000002
Figure PCTCN2021130505-appb-000002
采用了实施例方法制作的基准丝的误差Adopted the error of the reference wire made by embodiment method
Figure PCTCN2021130505-appb-000003
Figure PCTCN2021130505-appb-000003
Figure PCTCN2021130505-appb-000004
Figure PCTCN2021130505-appb-000004
标准丝误差分析表Standard wire error analysis table
Figure PCTCN2021130505-appb-000005
Figure PCTCN2021130505-appb-000005

Claims (7)

  1. 一种高精度超长悬索桥主缆索股标准丝的制作方法，其特征在于：包括A method for manufacturing a high-precision ultra-long suspension bridge main cable strand standard wire, characterized in that it includes:
    (一)基准丝的制作(1) Preparation of reference wire
    (1.1)在制作标准丝之前，先采用与标准丝相同材料的丝材制作一根m米长度的基准丝，正式制作基准丝之前，对丝材头尾端的弹性模量和直径进行测量，测量结果均达到设计的丝材标准弹性模量和标准直径要求；(1.1) Before making the standard wire, first use the wire material of the same material as the standard wire to make a reference wire with a length of m meters. Before making the reference wire formally, measure the elastic modulus and diameter of the head and tail of the wire. The results all meet the requirements of the designed wire standard elastic modulus and standard diameter;
    (1.2)将以上用于制作基准丝的丝材移入制作车间，静置，展开在基准丝台座上，测量展开后的丝材头尾端以及中间任意点的温度，要求丝材的温度离散不大于1℃，所述温度离散是指测量的温度中最高测量温度和最低测量温度之差；(1.2) Move the above wire used to make the reference wire into the production workshop, let it stand still, and unfold it on the reference wire stand, measure the temperature of the head, tail and any point in the middle of the unfolded wire, and the temperature of the wire is required to be discrete. Greater than 1°C, the temperature dispersion refers to the difference between the highest measured temperature and the lowest measured temperature among the measured temperatures;
    (1.3)根据主缆索股标记要求，转化为多段基准丝上的长度标记，该要求中分段标记长度有很多段，根据分段标记长度确定各基准丝分段标记位置；(1.3) According to the marking requirements of the main cable strands, it is converted into a length mark on the multi-section reference wire. In this requirement, there are many segments in the length of the segment mark, and the position of the segment mark of each reference wire is determined according to the length of the segment mark;
    (1.4)对各分段标记长度对应的标记点进行编号，将多段基准丝上的全部标记点按照投影的方式标记在一根基准丝上；(1.4) Number the marking points corresponding to the marking lengths of each segment, and mark all the marking points on the multi-section reference wire on one reference wire in the way of projection;
    (1.5)根据分段标记长度，用全站仪标定基准丝基线分段长度，并经复核，确保该基准丝基线分段长度与对应的分段标记长度一致；(1.5) Use a total station to calibrate the segment length of the baseline of the reference silk according to the length of the segment mark, and check to ensure that the segment length of the baseline of the reference silk is consistent with the length of the corresponding segment mark;
    (1.6)将丝材一端固定，在丝材末端加载提高测量丝材的直线度，给钢丝加载使基准丝材达到恒应力状态；(1.6) Fix one end of the wire, load the end of the wire to improve the straightness of the measured wire, and load the steel wire so that the reference wire reaches a constant stress state;
    (1.7)采用测距仪和尺的组合在丝材上进行测量和标记；(1.7) Use a combination of distance meter and ruler to measure and mark on the wire;
    (1.8)在各标记点进行长度标记，标记方式是在标记处沿钢丝长度方向喷涂两种颜色油漆，油漆分界线作为标准丝标记控制截面；(1.8) Carry out length marking at each marking point. The marking method is to spray two colors of paint along the length direction of the steel wire at the marking point, and the paint dividing line is used as the standard wire marking control section;
    (二)标准丝的制作(2) Production of standard wire
    (2.1)制作标准丝之前，选取与基准丝弹性模量和直径相同的丝材用于标准丝的制作；(2.1) Before making the standard wire, select the wire material with the same elastic modulus and diameter as the reference wire for making the standard wire;
    (2.2)将以上用于制作标准丝的丝材移入制作车间，静置，展开在标准丝台座上，测量展开后的丝材头尾端以及中间任意点的温度，要求丝材的温度离散不大于1℃，所述温度离散是指测量的温度中最高测量温度和最低测量温度之差；(2.2) Move the above wire used to make standard wire into the production workshop, let it stand still, and unfold it on the standard wire pedestal, measure the temperature of the head and tail of the unfolded wire and any point in the middle. It is required that the temperature of the wire is not discrete. Greater than 1°C, the temperature dispersion refers to the difference between the highest measured temperature and the lowest measured temperature among the measured temperatures;
    (2.3)在台座上对基准丝、标准丝末端加载，加载载荷相同，使基准丝、标准丝达到相同的应力状态；(2.3) Load the ends of the reference wire and standard wire on the pedestal with the same load, so that the reference wire and standard wire reach the same stress state;
    (2.4)台座上当前段标准丝依据基准丝上的标记点进行对比标记，标记方式是在标记处沿丝材长度方向喷涂两种颜色油漆，油漆分界线为标准丝标记控制截面，制作时，基准丝位置不变，标准丝与索股主缆等长，将标准丝分成若干与基准丝等长的若干段，参照基准丝上标记点的序号顺次在若干段的标准丝上进行标记，每标记完一段转移至下一段；(2.4) The current section of the standard wire on the pedestal is compared and marked according to the marking points on the reference wire. The marking method is to spray two colors of paint along the length of the wire at the marked position. The paint boundary is the standard wire marking control section. During production, The position of the reference wire remains unchanged, the standard wire is equal to the length of the cable strand main cable, the standard wire is divided into several sections of the same length as the reference wire, and marks are made on several sections of the standard wire in sequence referring to the serial numbers of the marking points on the reference wire. Move to the next paragraph after marking each paragraph;
    (2.5)对以上标记进行检查，检查无误后将当前段标准丝卷起，开始下一段标准丝的制作，依次完成整卷标准丝的制作；(2.5) Check the above marks, roll up the current section of standard wire after the inspection is correct, start the production of the next section of standard wire, and complete the production of the whole roll of standard wire in turn;
    (2.6)将制作完的标准丝盘卷、标识、包装好后储存备用；(2.6) Store the finished standard wire coils, labels, and packages for later use;
    (2.7)用同样方法制作下一根标准丝。(2.7) Use the same method to make the next standard wire.
  2. 根据权利要求1所述的方法，其特征在于：步骤(1.1)中，丝材的直径偏差不大于0.02mm。The method according to claim 1, characterized in that: in step (1.1), the diameter deviation of the wire material is not greater than 0.02mm.
  3. 根据权利要求1所述的方法，其特征在于：步骤(1.2)中，所述基准丝台座包括顺次布置的固定台座、多个滚轮支撑台座、定滑轮台座，丝材的起始端固定于所述固定台座，然后依次支撑于多个所述滚轮支撑台座，最后通过所述定滑轮台座上的定滑轮转向，所述滚轮支撑台座通过滚轮对丝材形成支撑。The method according to claim 1, characterized in that: in step (1.2), the reference wire pedestal comprises a fixed pedestal arranged in sequence, a plurality of roller support pedestals, and a fixed pulley pedestal, and the starting end of the wire is fixed on the fixed pedestal. The fixed pedestal is then supported on a plurality of roller support pedestals in turn, and finally turned by the fixed pulley on the fixed pulley pedestal, and the roller support pedestal forms a support for the wire through the roller.
  4. 根据权利要求1所述的方法，其特征在于：步骤(1.3)中，分段标记长度对应的标记点包括端点、散索鞍点、边跨跨中点、塔顶鞍座点、主跨跨中点。The method according to claim 1, characterized in that: in step (1.3), the marking points corresponding to the segmental marking length include end points, scatter saddle points, side span midpoints, tower top saddle points, main span mid spans point.
  5. 根据权利要求1所述的方法，其特征在于：步骤(1.6)中，采用定滑轮砝码在丝材末端加载。The method according to claim 1, characterized in that: in step (1.6), the weight of the fixed pulley is used to load the end of the wire.
  6. 根据权利要求1所述的方法，其特征在于：在步骤(一)中，在丝材标记过程中，丝材和尺的自重使丝材和尺各自在两滚轮支撑点之间产生下垂，在分段标记长度测量时应对钢丝与尺的垂度差修正。The method according to claim 1, characterized in that: in step (1), in the wire material marking process, the self-weight of the wire material and the ruler causes the wire material and the ruler to sag between the two roller support points respectively, The sag difference between the steel wire and the ruler should be corrected when measuring the length of the segmented mark.
  7. 根据权利要求1所述的方法，其特征在于：步骤(2.1)中，对丝材头尾及中间任意多个位置的弹性模量和直径进行测量，测量结果平均值均需达到标准弹性模量和标准直径要求。The method according to claim 1, characterized in that: in step (2.1), the elastic modulus and diameter of the head and tail of the wire and any number of positions in the middle are measured, and the average value of the measurement results needs to reach the standard elastic modulus and standard diameter requirements.
PCT/CN2021/130505 2021-08-31 2021-11-15 Method for manufacturing high-precision and ultra-long standard wire of main cable strand of suspension bridge WO2023029216A1 (en)

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