A new and old simply supported beam body matching positioning method for a widened bridge

Abstract

The application relates to a new and old simply supported beam body matching positioning method for a widened bridge, which comprises the following steps: measuring the center coordinates of first supports corresponding to all old simply supported beams on a splicing side and the center coordinates of second supports corresponding to all new simply supported beams on the splicing side; based on the center coordinates of the first supports and the center coordinates of the second supports, calculating the transverse bridge center deviation value of each second support; and performing transverse matching correction on all the new simply supported beams; based on the center coordinates of the first supports and the center coordinates of the second supports, calculating the longitudinal bridge center deviation value between two second supports at adjacent span ends, and performing longitudinal linear smoothness correction on all the new simply supported beams. The center of the first support and the center of the second support are taken as the reference for adjustment, the point position precision is improved, the pre-deviation and pre-deviation construction of the new simply supported beam can be planned in advance, the matching positioning is more time-saving and labor-saving, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of highway construction, in particular to a new and old simply supported beam body matching positioning method for widened bridge. BACKGROUND

[0002] At present, in the construction of widened bridge, the lower foundation is generally constructed in a new and old pier foundation split body, and the new pier foundation is independently constructed in the area adjacent to the side of the original old pier foundation. The upper structure is constructed in a way that the new precast beam body is wetly connected with the original old precast beam body to form a whole bridge. In order to ensure that the new and old structures of the beam body are combined into one, safe and durable, it is required that the new and old precast beam bodies of the widened bridge must be precisely matched, so that the new and old beam bodies become a whole structure. In most of the precast beam projects of the expressway, the simply supported installation is adopted first, then the continuous section of the pier top is cast in situ to form a continuous structure, and finally the bridge deck slab is cast in situ to form a multi-span continuous system with a composite cross section, which requires that the simply supported beam bodies of each adjacent bridge span in the continuous system are smoothly connected and the linear flow is smooth.

[0003] Because the original old bridge is often constructed for a long time, has a long operation time, and changes greatly, the original completion data is incomplete or greatly different from the actual situation, and the original construction measurement control network is missing, plus the original old bridge is still in operation during the design stage of the reconstruction and expansion, it is impossible to directly measure the center of the old bridge structure, and it is impossible to accurately provide the center coordinates of the old bridge structure, and it is impossible to precisely measure the coordinates of the center of the hidden structure support of the old bridge, which brings great difficulty to the construction matching of the new and old beam bodies and the smooth connection between the simply supported beam bodies of adjacent bridge spans.

[0004] In some related technologies, the traditional new and old simply supported beam body matching positioning measurement generally adopts the concrete entity structure size centering method to find the characteristic points of the old beam or uses the corners of the concrete structure as the characteristic points, such as geometric centering of the bent cap or supporting cushion stone, that is, the geometric center of the structure is found as the characteristic point by measuring the size of the bent cap or supporting cushion stone, or the corners of the bent cap or supporting cushion stone are taken as the characteristic points, and then the coordinates of the characteristic points are measured by the total station instrument. However, because the original old bridge structure shape size may be inaccurate, the characteristic points found by centering are not rigorous, the operation is rough, and the measurement accuracy is low. In the construction process, the new and old beam bodies are matched and positioned by the method of measuring the shape of the old beam body on the construction site when the beam erection is constructed. This method not only causes large matching error due to the inaccurate size of the old beam body shape, but also has the risk of waste of time and labor due to repeated matching, which affects the construction efficiency.

[0005] In some related technologies, the traditional bridge beam body lower structure measurement adopts the method of building a measurement platform to measure the structure, and the height and position of the measurement instrument on the measurement platform are adjusted to make the measurement instrument on the measurement platform have a clear view of the beam body lower structure. The measurement process is complex, time-consuming and labor-intensive, and the efficiency is low.

[0006] Furthermore, the space beneath the old simply supported beam is concealed and narrow, making it difficult to measure with a total station using traditional surveying equipment. This invention overcomes the challenge of the total station not being able to see the center of the concealed structural support.

[0007] It is evident that traditional methods for matching and positioning new and old simply supported beams suffer from low accuracy and low efficiency. Summary of the Invention

[0008] This application provides a method for matching and positioning new and old simply supported beams of a bridge to solve the problems of low matching and positioning accuracy and low efficiency in the matching and positioning measurement of new and old simply supported beams in related technologies.

[0009] Firstly, a method for matching and positioning new and old simply supported beams of a bridge to be widened is provided, which includes the following steps:

[0010] Measure the center coordinates of the first support corresponding to all old simply supported beams on the splicing side, and the center coordinates of the second support corresponding to all new simply supported beams on the splicing side;

[0011] Based on the center coordinates of the first support and the center coordinates of the second support, the transverse center deviation value of each second support is calculated; according to the transverse center deviation value, all new simply supported beams are subjected to transverse matching correction.

[0012] Based on the center coordinates of the first support and the center coordinates of the second support, the longitudinal bridge center offset value between the two second supports at all adjacent spans is calculated. Based on the longitudinal bridge center offset value, the longitudinal alignment of all new simply supported beams is corrected.

[0013] In some embodiments, after all the new simply supported beams have undergone lateral matching correction and longitudinal alignment smoothing correction, a ballast operation is performed; then, when the settlement difference is stable within the limit range, wet joint construction and bridge deck system construction are carried out.

[0014] In some embodiments, measuring the center coordinates of the first supports corresponding to all old simply supported beams on the splicing side, and the center coordinates of the second supports corresponding to all new simply supported beams on the splicing side, includes the following steps:

[0015] Provide auxiliary devices and total stations for measuring the center coordinates of the supports;

[0016] Install the support center coordinate measuring auxiliary device on the first support; install the total station on the center of the first second support in the longitudinal direction of the splicing side, and on the center of the last second support;

[0017] The center coordinates of the first support were obtained using a support center coordinate measuring auxiliary device and a total station.

[0018] The center coordinates of the second support were obtained using a total station.

[0019] In some embodiments, the support center coordinate measurement auxiliary device includes:

[0020] A right-angle hinge clamp is used to be mounted on the first support;

[0021] Two horizontal telescopic rods are respectively installed on the two right-angled sides of the right-angled hinge; the two horizontal telescopic rods are arranged perpendicular to each other;

[0022] Two prism rods are respectively vertically connected to the two horizontal telescopic rods, and prisms are provided on the prism rods; the prism rods on the horizontal telescopic rods parallel to the transverse bridge direction extend vertically upward, and the prism rods on the horizontal telescopic rods parallel to the longitudinal bridge direction extend vertically downward.

[0023] In some embodiments, the center of the first second support on the splicing side is taken as the origin, and the Y-axis is formed along the longitudinal direction of the bridge, and the X-axis is formed along the transverse direction of the bridge.

[0024] The center coordinates of the second support were obtained using a total station.

[0025] Right-angle hinge clamps are installed on the first supports at both ends of each of the old simply supported beams. The horizontal telescopic rods on the right-angle hinge clamps are adjusted so that the prisms on the prism rods are in line with the total station, so as to obtain the planar coordinates of the four prisms corresponding to each of the old simply supported beams.

[0026] Based on the planar coordinates of the four prisms corresponding to each of the old simply supported beams, the center coordinates of the first support at both ends of each old simply supported beam are obtained.

[0027] In some embodiments, obtaining the center coordinates of the first supports at both ends of each old simply supported beam based on the planar coordinates of the four prisms corresponding to each old simply supported beam includes the following steps:

[0028] Obtain the plane coordinates corresponding to the four prisms of each of the old simply supported beams to obtain the horizontal distance from the four horizontal telescopic rods to the center of the corresponding first support;

[0029] The center coordinates of the first support at one end of the old simply supported beam are calculated using the first formula and the horizontal distance.

[0030] The center coordinates of the first support at the other end of the old simply supported beam are calculated using the second formula and the horizontal distance.

[0031] In some embodiments, based on the center coordinates of the first support and the center coordinates of the second support, the transverse center deviation value of each second support is calculated, including the following steps:

[0032] Using the third formula, the center coordinates of the first support, the center coordinates of the second support, and the horizontal distance, the transverse center deviation value of the second support corresponding to one end of the new simply supported beam spanning the same span as the old simply supported beam is calculated.

[0033] Using the fourth formula, the center coordinates of the first support, the center coordinates of the second support, and the horizontal distance, the transverse center deviation value of the second support corresponding to the other end of the new simply supported beam spanning the same span as the old simply supported beam is calculated.

[0034] In some embodiments, the longitudinal bridge center offset value between two second supports at adjacent span ends is calculated using the fifth formula, the center coordinates of the first support, the center coordinates of the second support, and the horizontal distance; or,

[0035] Using the sixth formula, the center coordinates of the first support, the center coordinates of the second support, and the horizontal distance, the longitudinal bridge center offset value between the two second supports at adjacent span ends is calculated.

[0036] In some embodiments, lateral matching correction is performed on all new simply supported beams based on the transverse center deviation value, including the following steps:

[0037] Compare the transverse center deviation values ​​of the second supports at both ends of the new simply supported beam with the allowable deviation range for construction.

[0038] If the transverse center deviation values ​​of the second supports at both ends of the new simply supported beam are within the allowable deviation range for construction, then the center of the second supports at both ends of the new simply supported beam shall be used as a reference to position the new simply supported beam.

[0039] If only one of the transverse center deviation values ​​of the second supports at both ends of the new simply supported beam is within the allowable construction deviation range, then the center of the two second supports (the center of the second support whose transverse center deviation value is within the allowable construction deviation range) is used as the reference, and the center of the other second support is corrected according to 1 / 2 of the transverse center deviation value of that end. After correction, the new simply supported beam is positioned.

[0040] If the transverse center deviation values ​​of the second supports at both ends of the new simply supported beam are not within the allowable deviation range for construction, then the center of the second supports at both ends of the new simply supported beam will be corrected according to 1 / 2 of the transverse center deviation values ​​at both ends, with the axis of the new simply supported beam as the reference. After correction, the new simply supported beam will be positioned.

[0041] In some embodiments, longitudinal alignment smoothness correction is performed on all new simply supported beams based on the longitudinal bridge center offset value, including the following steps:

[0042] The longitudinal bridge center offset value between the two second supports at adjacent span ends is compared with the first allowable offset value and the second allowable offset value; the first allowable offset value is greater than the second allowable offset value;

[0043] If the longitudinal bridge center offset value is not greater than the second allowable offset value, no correction is required;

[0044] If the longitudinal bridge center deviation value is between the second allowable deviation value and the first allowable deviation value, and at least one of the transverse bridge center deviation values ​​of the second supports at both ends of the new simply supported beam is not within the construction allowable deviation range, then the relative longitudinal bridge center deviation of the two second supports at adjacent span ends will be reduced.

[0045] If the longitudinal bridge center deviation value is greater than the first allowable deviation value, and the transverse bridge center deviation values ​​of the second supports at both ends of the new simply supported beam are within the allowable construction deviation range, then the relative longitudinal bridge center deviation of the two second supports at adjacent span ends will be reduced.

[0046] The beneficial effects of the technical solution provided in this application include:

[0047] This application provides a method for matching and positioning new and old simply supported beams of a bridge being widened. Since the first and second supports are regular, standardized products with dimensions more accurate than concrete entities, the accuracy of the positioning points is improved. Adjustment is made using the centers of the first and second supports as a reference, replacing the method of finding general feature points based on the external dimensions of the structure and then measuring them. This avoids the problems caused by measuring based on concrete. In addition, the transverse and longitudinal center deviation values ​​are obtained from the center coordinates of the second and first supports corresponding to the new and old simply supported beams, thereby adjusting the relative misalignment between adjacent spans of the new simply supported beams within the continuous system. This improves the longitudinal matching and connection accuracy of the new simply supported beams and allows for advance planning of the pre-deviation and pre-misalignment construction of the new simply supported beams, making the matching and positioning more time-saving and labor-saving, and improving construction efficiency. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A general flowchart of the matching and positioning method for new and old simply supported beams of a bridge widening project provided in this application embodiment;

[0050] Figure 2A schematic diagram showing the support center coordinate measuring auxiliary device provided in this application embodiment installed on the first support for measurement;

[0051] Figure 3 A three-dimensional structural schematic diagram of the support center coordinate measuring auxiliary device provided in the embodiments of this application;

[0052] Figure 4 This is a top view of the support center coordinate measuring auxiliary device provided in the embodiments of this application.

[0053] In the diagram: 1. New simply supported beam; 2. Old simply supported beam; 3. First support; 4. Second support; 5. Support center coordinate measuring auxiliary device; 500. Right-angle hinge clamp; 5001. L-shaped clamp; 5002. Hinge shaft; 5003. Locking component; 501. Horizontal telescopic rod; 5011. Connecting cylinder; 5012. Moving rod; 5013. Fixing component; 502. Prism rod; 503. U-shaped frame. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] A matching and positioning method for new and old simply supported beams of a bridge to be widened is proposed to solve the problems of low matching and positioning accuracy and low efficiency in the matching and positioning measurement of new and old simply supported beams in related technologies.

[0056] Please see Figure 1 and Figure 2 A method for matching and positioning new and old simply supported beams of a bridge to be widened includes the following steps:

[0057] Step S01: Measure the center coordinates of the first support 3 corresponding to all old simply supported beams 2 on the splicing side, and the center coordinates of the second support 4 corresponding to all new simply supported beams 1 on the splicing side.

[0058] Step S02: Based on the center coordinates of the first support 3 and the center coordinates of the second support 4, calculate the transverse center deviation value of each second support 4; and perform transverse matching correction on all new simply supported beams 1 according to the transverse center deviation value.

[0059] Step S03: Based on the center coordinates of the first support 3 and the center coordinates of the second support 4, calculate the longitudinal bridge center offset value between the two second supports 4 at all adjacent spans. According to the longitudinal bridge center offset value, perform longitudinal alignment smoothness correction on all new simply supported beams 1.

[0060] Through the above steps, since the first support 3 and the second support 4 are regular, standardized products with dimensions more accurate than concrete entities, the accuracy of the points is improved. Adjustments are made using the centers of the first support 3 and the second support 4 as a reference, replacing the method of finding general feature points based on the external dimensions of the structure and then measuring them. This avoids the problems caused by measuring based on concrete. In other words, it solves the problems that bridges are often built a long time ago, have been in operation for a long time, and have undergone significant changes, resulting in incomplete original as-built data or data that differs greatly from the actual situation. It also addresses the issues of the lack of the original construction measurement control network, and the fact that the old bridge was still in operation during the renovation and expansion design phase, making it impossible to directly measure the center of the old bridge structure, accurately provide the center coordinates of the old bridge structure, and precisely measure the coordinates of the center of the hidden structural supports of the old bridge.

[0061] Furthermore, the dimensions of the old bridge structure may be inaccurate, the feature points identified during the division are not rigorous, the work is rough, and the measurement accuracy is low. During the construction process, there are also issues where the new and old beams are matched and positioned by measuring the shape of the old beams on the construction site when the beams are erected.

[0062] In addition, the transverse and longitudinal center deviation values ​​are obtained by using the center coordinates of the second support 4 and the first support 1 corresponding to the new and old simply supported beams. This allows for transverse and longitudinal adjustments to be made to adjust the relative misalignment between adjacent spans of the new simply supported beams within the continuous system. This improves the longitudinal matching and connection accuracy of the new simply supported beams and enables advance planning of the pre-deviation and pre-misalignment construction of the new simply supported beams, making the matching and positioning more time-saving and labor-saving, and improving construction efficiency.

[0063] In some preferred embodiments, after all new simply supported beams 1 have undergone lateral matching correction and longitudinal alignment smoothing correction, a ballast operation is performed; then, when the settlement difference stabilizes within the tolerance range, wet joint construction and bridge deck system construction are carried out, specifically as follows:

[0064] When the post-construction settlement difference between the old and new bridge pier foundations is stable within the limit range, based on the first support 3 at both ends of the old simply supported beam 2 and the bridge deck elevation at the mid-span, the elevation of the second support 4 is determined according to the deflection of the old simply supported beam 2, the elevation of the first support 3, the height of the new simply supported beam 1, and the deflection of the new simply supported beam 1 after creep stabilization, and the new simply supported beam 1 is erected; after the new simply supported beam 1 is erected and the settlement difference is stable within the limit range after the ballast work, the wet joint construction of the new simply supported beam 1 and the old simply supported beam 2 and the bridge deck system construction are carried out to make the old and new bridge decks flat.

[0065] In some preferred embodiments, step S01 specifically includes the following steps:

[0066] S011. Provides a support center coordinate measurement auxiliary device 5 and a total station;

[0067] S012. Install the support center coordinate measuring auxiliary device 5 on the first support 3; install the total station on the center of the first second support 4 in the longitudinal direction of the splicing side, and on the center of the last second support 4; the support center coordinate measuring auxiliary device 5 includes: a right-angle hinge clamp 500, which is used to install on the first support 3; two horizontal telescopic rods 501, which are respectively installed on the two right-angled sides of the right-angle hinge clamp 500; the two horizontal telescopic rods 501 are set perpendicular to each other; two prism rods 502, which are respectively vertically connected to the two horizontal telescopic rods 501, and the prism rods 502 are provided with prisms; the prism rods 502 on the horizontal telescopic rods 501 parallel to the transverse direction of the bridge extend vertically upward, and the prism rods 502 on the horizontal telescopic rods 501 parallel to the longitudinal direction of the bridge extend vertically downward.

[0068] S013. The center coordinates of the first support 3 are obtained using the support center coordinate measuring auxiliary device 5 and the total station.

[0069] S014. Use a total station to obtain the center coordinates of the second support 4.

[0070] refer to Figure 2 In some preferred embodiments, the center of the first second support 4 on the splicing side is taken as the origin, and the Y-axis is formed along the longitudinal direction of the bridge and the X-axis is formed along the transverse direction of the bridge.

[0071] S014 specifically involves: using a total station to obtain the center coordinates of the second support 4, and recording the center coordinates of the second support 4 corresponding to both ends of each new simply supported beam 1 as x. 0i y 0i and x 0j ,y 0j , where o is the number of the second support 4 starting from the origin, i indicates that i is the second support 4 at one end of the new simply supported beam 1, and j is the second support 4 at the other end of the new simply supported beam 1.

[0072] Step S013 specifically involves:

[0073] S0130. Install right-angle hinge clamps 500 on the first supports 3 at both ends of each old simply supported beam 2. Adjust the length of the horizontal telescopic rod 501 in the longitudinal direction so that the downward-facing prism rod 502 is in line with the total station. Adjust the length of the horizontal telescopic rod 501 in the transverse direction so that the upward-facing prism rod 502 is in line with the gap between the outer wall of the old simply supported beam and its anti-vibration block, and is in line with the total station. Install four prisms, such as A, B, C, and D, on the four prism rods 502 and face the total station to obtain the plane coordinates of the four prisms corresponding to each old simply supported beam 2, and record them as x. Ai ,y Ai x Bi ,y Bi x Cj ,y Cj and x Dj ,y Dj i represents the first support 3 at one end of the old simply supported beam 2, and j represents the first support 3 at the other end of the old simply supported beam 2.

[0074] S0131. Based on the planar coordinates of the four prisms corresponding to each old simply supported beam 2, obtain the center coordinates of the first support 3 at both ends of each old simply supported beam 2, and record them as x. i ,y i and x j ,y j This step specifically includes the following steps:

[0075] Obtain the plane coordinates corresponding to the four prisms of each old simply supported beam 2 to obtain the horizontal distance from the four horizontal telescopic rods 501 to the center of the corresponding first support 3, and record it as l. A l B l C l D ;

[0076] The center coordinates of the first support 3 at one end of the old simply supported beam 2 are calculated using the first formula and the horizontal distance. The first formula is:

[0077]

[0078]

[0079] The center coordinates of the first support 3 at the other end of the old simply supported beam 2 are calculated using the second formula and the horizontal distance. The second formula is:

[0080]

[0081]

[0082] In some preferred embodiments, step S02 specifically includes the following steps:

[0083] Step S020: Based on the center coordinates of the first support 3 and the center coordinates of the second support 4, calculate the transverse center deviation value of each second support 4, including the following steps:

[0084] Using the third formula, the center coordinates of the first support 3, the center coordinates of the second support 4, and the horizontal distance, the transverse center deviation of the second support 4 corresponding to one end of the new simply supported beam 1 spanning the same distance as the old simply supported beam 2 is calculated. The third formula is:

[0085] Δx Oi =x i -x Oi ;

[0086] Δy Oi =y i -y Oi ;

[0087] Using the fourth formula, the center coordinates of the first support 3, the center coordinates of the second support 4, and the horizontal distance, the transverse center deviation value of the second support 4 corresponding to the other end of the new simply supported beam 1 spanning the same distance as the old simply supported beam 2 is calculated. The fourth formula is:

[0088] Δx Oj =x j -x Oj ;

[0089] Δy Oj =y j -y Oj .

[0090] Step S021: Based on the transverse center deviation value, perform transverse matching correction on all new simply supported beams 1, including the following steps:

[0091] S0210. Compare the transverse center deviation of the second support 4 at both ends of the new simply supported beam 1 with the allowable deviation range during construction.

[0092] S0211. If the transverse center deviation of the second support 4 at both ends of the new simply supported beam 1 is within the allowable deviation range for construction, then the center of the second support 4 at both ends of the new simply supported beam 1 shall be used as the reference to position the new simply supported beam 1.

[0093] S0212. If only one of the transverse center deviation values ​​of the second supports 4 at both ends of the new simply supported beam 1 is within the construction allowable deviation range, then the center of the second support 4 whose transverse center deviation value is within the construction allowable deviation range shall be used as the reference, and the center of the other second support 4 shall be corrected according to 1 / 2 of the transverse center deviation value at that end. After correction, the new simply supported beam 1 shall be positioned.

[0094] S0213. If the transverse center deviation values ​​of the second supports 4 at both ends of the new simply supported beam 1 are not within the allowable deviation range for construction, then the center of the second supports 4 at both ends of the new simply supported beam 1 will be corrected according to 1 / 2 of the transverse center deviation values ​​at both ends, with the axis of the new simply supported beam 1 as the reference. After correction, the new simply supported beam 1 will be positioned.

[0095] In some preferred embodiments, step S03 specifically includes the following steps:

[0096] Step S030: Using the fifth formula, the center coordinates of the first support 3, the center coordinates of the second support 4, and the horizontal distance, calculate the longitudinal bridge center offset value between the two second supports 4 at adjacent span ends; or,

[0097] Using the sixth formula, the center coordinates of the first support 3, the center coordinates of the second support 4, and the horizontal distance, the longitudinal bridge center offset value between the two second supports 4 at adjacent span ends is calculated.

[0098] The fifth formula (first allowable offset value) is:

[0099]

[0100] The sixth formula (the second permissible deviation value) is:

[0101] Where i+1 and i represent the two second supports 4 at adjacent span ends.

[0102] Step S031: Based on the longitudinal center offset value, perform longitudinal alignment smoothness correction on all new simply supported beams 1, including the following steps:

[0103] S0310. Compare the longitudinal bridge center deviation value between the two second supports 4 at adjacent span ends with the first allowable deviation value and the second allowable deviation value; the first allowable deviation value is greater than the second allowable deviation value;

[0104] S0311. If the longitudinal bridge center offset value is not greater than the second allowable offset value, no correction is required;

[0105] S0312. This step is performed after steps S0212 and S0213. If the longitudinal bridge center deviation value is between the second allowable deviation value and the first allowable deviation value, and at least one of the transverse bridge center deviation values ​​of the second supports 4 at both ends of the new simply supported beam 1 is not within the construction allowable deviation range, then the relative longitudinal bridge center deviation of the two second supports 4 at adjacent span ends is reduced by 1 / 2, so that the new simply supported beam 1 has a smooth line.

[0106] S0313. This step is performed after step S0211. If the longitudinal bridge center deviation value is greater than the first allowable deviation value, and the transverse bridge center deviation values ​​of the second supports 4 at both ends of the new simply supported beam 1 are within the allowable construction deviation range, then the relative deviation of the centers of the two second supports 4 at adjacent span ends in the longitudinal bridge direction is reduced by 1 / 2, making the new simply supported beam 1 straight.

[0107] refer to Figure 3 and Figure 4 This application also proposes an auxiliary device for measuring the center coordinates of a support, which includes:

[0108] A right-angle hinge 500 is used to connect with the right-angled side that is perpendicular to the first support 3;

[0109] Two horizontal telescopic rods 501 are respectively installed on the two right-angled sides of the right-angled hinge 500; the two horizontal telescopic rods 501 are arranged perpendicularly to each other, and the horizontal telescopic rods 501 are marked with scales indicating their length;

[0110] Two prism rods 502 are vertically connected to two horizontal telescopic rods 501 respectively, and prisms are provided on the prism rods 502; the prism rods 502 on the horizontal telescopic rods 501 parallel to the transverse direction extend vertically upward, and the prism rods 502 on the horizontal telescopic rods 501 parallel to the longitudinal direction extend vertically downward.

[0111] With the above setup, since the right-angle hinge clamp 500 can be connected to the right angle of the support, and since the prism rod 502 on the horizontal telescopic rod 501 parallel to the transverse direction of the bridge extends vertically upward and the prism rod 502 on the horizontal telescopic rod 501 parallel to the longitudinal direction of the bridge extends vertically downward, the prism on the prism rod 502 can be seen through the total station by adjusting the length of the horizontal telescopic rod 501. Thus, the right-angle hinge clamp 500 can penetrate into the hidden and narrow space under the old simply supported beam 2, overcoming the problem that the center of the support is difficult to see through to the total station. This facilitates the measurement of the center of the old beam's support at any time and ensures accurate detection.

[0112] In some preferred embodiments, the following configuration is made to facilitate the mounting of the right-angle hinge 500 on the first support 3:

[0113] The right-angle hinge clamp 500 includes two L-shaped clamps 5001 and a locking element 5003.

[0114] The two L-shaped clamps 5001 are hinged at their close ends by a hinge shaft 5002; the locking element 5003 is provided on the two L-shaped clamps 5001 at their far ends so that the L-shaped clamps 5001 and the first support 3 can be tightened or loosened.

[0115] Furthermore, the locking element 5003 has two forms:

[0116] In the first structure, the L-shaped clamp 5001 has a threaded hole; the locking member 5003 includes a first locking screw, which passes through the threaded hole and abuts against or releases from the first support 3. When fixation is required, the first locking screw abuts against the first support 3.

[0117] The second structure includes a locking element 5003 comprising a suction cup and an electromagnet. One end of the electromagnet is connected to the L-shaped clamp 5001, and the other end is connected to the suction cup. The electromagnet is also connected to a power switch. This design is intended to accommodate steel supports, utilizing the magnetic force generated by energization to attract and connect with the steel.

[0118] In some preferred embodiments, to enable the horizontal telescopic rod 501 to have an adjustable length, its structure may be configured as follows:

[0119] First structure

[0120] The horizontal telescopic rod 501 includes a connecting cylinder 5011, a movable rod 5012, and a fixing member 5013. The connecting cylinder 5011 has a receiving channel; one end of the movable rod 5012 slides in the receiving channel, and the other end is perpendicularly connected to the prism rod 502; the outer surface of the movable rod 5012 has a scale along its length; the fixing member 5013 is installed on the connecting cylinder 5011 and is used to limit and fix the movable rod 5012.

[0121] Furthermore, the fixing member 5013 includes a second locking screw; the moving rod 5012 has a guide groove corresponding to the second locking screw along its length. When adjusted to the required length and needing to be fixed, it is fixed to the guide groove by the second locking screw.

[0122] Alternatively, the following fixing structure can be used: The end of the connecting cylinder 5011 furthest from the right-angle hinge clamp 500 is provided with multiple clamping plates with arc-shaped cross-sections. These clamping plates are circularly distributed around the central axis of the connecting cylinder 5011. The outer surface of each clamping plate is provided with a first clamping thread. The fixing member 5013 includes a clamping collar, the inner wall of which is provided with a second clamping thread that matches the first clamping thread. The clamping collar is fitted onto the outside of the multiple clamping plates via the first and second clamping threads. The clamping collar clamps the clamping plates, thereby tightening the moving rod 5012.

[0123] Second structure

[0124] The horizontal telescopic rod 501 includes a connecting cylinder 5011 and a movable rod 5012; the connecting cylinder 5011 houses an electric telescopic rod; one end of the movable rod 5012 is connected to the electric telescopic rod, and the other end is perpendicularly connected to the prism rod 502; the outer surface of the movable rod 5012 has graduations along its length. The movable rod 5012 is moved using the electric telescopic rod to achieve telescopic movement.

[0125] In some preferred embodiments, a U-shaped frame 503 is provided on the prism rod 502, and a prism is provided inside the U-shaped frame 503; the prism rod 502 is a vertical telescopic rod, which facilitates the installation of the prism and the adjustment of the prism's line of sight with the total station.

[0126] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0127] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0128] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for matching and positioning new and old simply supported beams of a bridge to be widened, characterized in that, It includes the following steps: Measure the center coordinates of the first support (3) corresponding to all old simply supported beams (2) on the splicing side, and the center coordinates of the second support (4) corresponding to all new simply supported beams (1) on the splicing side; Based on the center coordinates of the first support (3) and the center coordinates of the second support (4), the transverse center deviation value of each second support (4) is calculated; according to the transverse center deviation value, all new simply supported beams (1) are subjected to transverse matching correction. Based on the center coordinates of the first support (3) and the center coordinates of the second support (4), the longitudinal bridge center offset value between the two second supports (4) at all adjacent spans is calculated. Based on the longitudinal bridge center offset value, the longitudinal alignment of all new simply supported beams (1) is corrected.

2. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 1, characterized in that: After all the new simply supported beams (1) have undergone lateral matching correction and longitudinal alignment smoothing correction, a ballast operation is performed; then, when the settlement difference is stable within the limit range, wet joint construction and bridge deck construction are carried out.

3. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 1, characterized in that, Measuring the center coordinates of the first support (3) corresponding to all old simply supported beams (2) on the splicing side, and the center coordinates of the second support (4) corresponding to all new simply supported beams (1) on the splicing side, includes the following steps: Provides a support center coordinate measurement auxiliary device (5) and a total station; Install the support center coordinate measuring auxiliary device (5) on the first support (3); install the total station on the center of the first second support (4) on the longitudinal direction of the splicing side, and on the center of the last second support (4); The center coordinates of the first support (3) are obtained using the support center coordinate measuring auxiliary device (5) and the total station; The center coordinates of the second support (4) are obtained using a total station.

4. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 3, characterized in that, The auxiliary device (5) for measuring the center coordinates of the support includes: A right-angle hinge (500) is used to be mounted on the first support (3); Two horizontal telescopic rods (501) are respectively installed on the two right-angled sides of the right-angled hinge (500); the two horizontal telescopic rods (501) are arranged perpendicular to each other; Two prism rods (502) are respectively vertically connected to the two horizontal telescopic rods (501), and prisms are provided on the prism rods (502); the prism rods (502) on the horizontal telescopic rods (501) parallel to the transverse bridge direction extend vertically upward, and the prism rods (502) on the horizontal telescopic rods (501) parallel to the longitudinal bridge direction extend vertically downward.

5. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 4, characterized in that: Using the center of the first second support (4) on the splicing side as the origin, a Y-axis is formed along the longitudinal direction of the bridge, and an X-axis is formed along the transverse direction of the bridge; the center coordinates of the second support (4) are obtained using a total station; Right-angle hinge clamps (500) are installed on the first support (3) at both ends of each of the old simply supported beams (2). The horizontal telescopic rod (501) on the right-angle hinge clamp (500) is adjusted so that the prism on the prism rod (502) can communicate with the total station so as to obtain the plane coordinates of the four prisms corresponding to each of the old simply supported beams (2). Based on the planar coordinates of the four prisms corresponding to each of the old simply supported beams (2), the center coordinates of the first support (3) at both ends of each old simply supported beam (2) are obtained.

6. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 5, characterized in that, The process of obtaining the center coordinates of the first support (3) at both ends of each old simply supported beam (2) based on the planar coordinates of the four prisms corresponding to each old simply supported beam (2) includes the following steps: Obtain the plane coordinates corresponding to the four prisms of each of the old simply supported beams (2) to obtain the horizontal distance from the four horizontal telescopic rods (501) to the center of the corresponding first support (3); The center coordinates of the first support (3) at one end of the old simply supported beam (2) are calculated using the first formula and the horizontal distance; the first formula is: ； ;in, and Let A, B, and C be the plane coordinates of the two prisms on the first support (3) at one end of the old simply supported beam (2). and The horizontal distance from the two horizontal telescopic rods (501) on the first support (3) at one end of the old simply supported beam (2) to the center of the corresponding first support (3) is denoted as . Let the coordinates be the center coordinates of the first support (3) at one end of the old simply supported beam (2); The center coordinates of the first support (3) at the other end of the old simply supported beam (2) are calculated using the second formula and the horizontal distance. The second formula is: ； ;in, and Let A, B, and C be the plane coordinates of the two prisms on the first support (3) at the other end of the old simply supported beam (2). and The horizontal distance from the two horizontal telescopic rods (501) on the first support (3) at the other end of the old simply supported beam (2) to the center of the corresponding first support (3) is: The coordinates of the center of the first support (3) at the other end of the old simply supported beam (2) are given.

7. The matching and positioning method for new and old simply supported beams of a bridge widening project as described in claim 6. Its features are, Based on the center coordinates of the first support (3) and the center coordinates of the second support (4), the transverse center deviation value of each second support (4) is calculated, including the following steps: Using the third formula, the center coordinates of the first support (3), the center coordinates of the second support (4), and the horizontal distance, the transverse center deviation value of the second support (4) corresponding to one end of the new simply supported beam (1) spanning the same distance as the old simply supported beam (2) is calculated; the third formula is: ； ;in, , The center coordinates of the second support (4) corresponding to one end of the new simply supported beam (1) spanning the same distance as the old simply supported beam (2); , The transverse center deviation value of the second support (4) corresponding to one end of the new simply supported beam (1) spanning the same span as the old simply supported beam (2); Using the fourth formula, the center coordinates of the first support (3), the center coordinates of the second support (4), and the horizontal distance, the transverse center deviation value of the second support (4) corresponding to the other end of the new simply supported beam (1) spanning the same length as the old simply supported beam (2) is calculated. The fourth formula is: ； ;in, , The center coordinates of the second support (4) corresponding to the other end of the new simply supported beam (1) spanning the same distance as the old simply supported beam (2); , The transverse center deviation value of the second support (4) corresponding to the other end of the new simply supported beam (1) spanning the same span as the old simply supported beam (2).

8. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 6, characterized in that: Using the fifth formula, the center coordinates of the first support (3), the center coordinates of the second support (4), and the horizontal distance, the longitudinal bridge center offset value between the two second supports (4) at adjacent span ends is calculated; or, Using the sixth formula, the center coordinates of the first support (3), the center coordinates of the second support (4), and the horizontal distance, the longitudinal bridge center offset value between the two second supports (4) at adjacent span ends is calculated; The fifth formula is: ； The sixth formula is: ; where i+1 and i represent the two second supports at adjacent span ends (4).

9. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 1, characterized in that, According to the above The transverse center deviation value is used to correct the transverse matching of all new simply supported beams (1), including the following steps: The transverse center deviation of the second support (4) at both ends of the new simply supported beam (1) is compared with the allowable deviation range for construction. If the transverse center deviation values ​​of the second supports (4) at both ends of the new simply supported beam (1) are within the allowable deviation range for construction, then the center of the second supports (4) at both ends of the new simply supported beam (1) is used as the reference to position the new simply supported beam (1). If only one of the transverse center deviation values ​​of the second supports (4) at both ends of the new simply supported beam (1) is within the allowable deviation range, then the center of the second support (4) whose transverse center deviation value is within the allowable deviation range is used as the reference, and the center of the other second support (4) is corrected according to 1 / 2 of the transverse center deviation value at that end. After correction, the new simply supported beam (1) is positioned. If the transverse center deviation of the second support (4) at both ends of the new simply supported beam (1) is not within the allowable deviation range for construction, the center of the second support (4) at both ends of the new simply supported beam (1) will be corrected according to 1 / 2 of the transverse center deviation of both ends, with the axis of the new simply supported beam (1) as the reference. After correction, the new simply supported beam (1) will be positioned.

10. The method for matching and positioning new and old simply supported beams of a bridge as described in claim 9, characterized in that, Based on the longitudinal bridge center offset value, longitudinal alignment smoothness correction is performed on all new simply supported beams (1), including the following steps: The longitudinal bridge center offset value between the two second supports (4) at adjacent span ends is compared with the first allowable offset value and the second allowable offset value; the first allowable offset value is greater than the second allowable offset value; If the longitudinal bridge center offset value is not greater than the second allowable offset value, no correction is required; If the longitudinal bridge center deviation value is between the second allowable deviation value and the first allowable deviation value, and at least one of the transverse bridge center deviation values ​​of the second supports (4) at both ends of the new simply supported beam (1) is not within the construction allowable deviation range, then the relative longitudinal bridge center deviation of the two second supports (4) at adjacent span ends will be reduced. If the longitudinal bridge center deviation value is greater than the first allowable deviation value, and the transverse bridge center deviation values ​​of the second supports (4) at both ends of the new simply supported beam (1) are within the construction allowable deviation range, then the relative longitudinal bridge center deviation of the two second supports (4) at adjacent span ends will be reduced.

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