CN103882815B - The remodeling method of orthotropic steel bridge deck - Google Patents

Abstract

The present invention relates to a kind of reconstruction method of orthotropic steel bridge deck, and technical scheme comprises the following steps: A, formulate the measurement scheme of the main control point of the whole bridge of old bridge structure, thereby obtain the overall alignment of old bridge structure; B, formulate the old bridge structure The measurement plan of the control points of each segment of the bridge structure, so as to obtain the main control dimensions of each segment of the old bridge structure; C. Existing holes, new holes and/or on-site drilling required for the matching connection of the new and old structures The type and size of the hole, formulate the position plan of the existing hole, the existing splicing plate and the existing support plate; D. The prefabricated orthotropic steel deck and the old bridge structure are bolted together through angle steel. By adopting a systematic measurement and control method, the present invention can effectively obtain the deformation characteristics of the old bridge structure, and simulate the actual line shape of the old bridge structure, so as to determine the manufacturing line shape of the new structure, realize the matching installation of the new and old structures, and reduce construction sites The difficulty of installation and erection improves the installation efficiency.

Description

Reconstruction Method of Orthotropic Steel Bridge Deck

technical field

The invention relates to a method for transforming orthotropic steel bridge decks, and belongs to the technical field of railway bridge design and construction.

Background technique

At present, many existing bridges in our country have various damages and defects to varying degrees. How to strengthen and transform these bridges is already a very large and important project. At present, the reconstruction and reinforcement technology of old bridges in our country is more focused on the research on reconstruction and reinforcement methods, bridge bearing design, calculation, etc., but less research on the measurement and control of the deformation of old bridges, which will affect the new and old structures. Matching connections bring difficulties and increase the difficulty and workload of site installation and erection.

Contents of the invention

The technical problem to be solved by the present invention is to provide a reconstruction plan for orthotropic steel bridge deck and a measurement and control method for the old bridge system, so as to realize the matching installation of the new and old structures and ensure the smooth progress of the installation and erection on the construction site.

The reconstruction method of orthotropic steel bridge deck comprises the following steps:

A. Formulate the measurement plan for the main control points of the old bridge structure, so as to obtain the overall alignment of the old bridge structure;

B. Formulate the measurement plan for the control points of each section of the old bridge structure, so as to obtain the main control dimensions of each section of the old bridge structure;

C. According to the type and size of the existing holes, newly made holes and/or drilled holes on the construction site that need to be used when the new and old structures are matched and connected, the location plan of the holes on the beams and longitudinal beams of the old bridge structure shall be formulated on site;

D. The prefabricated orthotropic steel deck (DP) and the old bridge structure are bolted together through angle steel.

The transformation method of the orthotropic steel deck, the measurement control point of the whole bridge overall alignment of the old bridge structure described in step A selects the center line of the bridge and the intersection of the axis of the longitudinal beam on both sides of the center line of the bridge and the center line of the beam of each segment as the control point , measure the three-dimensional coordinates of each control point.

The transformation method of the orthotropic steel bridge deck, when measuring each control point on the beam of the old bridge structure on site, establish a coordinate system with the plane where the beam is located, measure from the center line of the bridge to both sides along the axis of the beam, and provide the distance between each control point and the bridge on the site. distance from the midline.

The transformation method of the orthotropic steel deck, the measurement control point of each segment line shape of the old bridge structure described in step B, selects the intersection point and segment of the longitudinal beam axis on both sides of the bridge center line in the segment and the beam center line at the node The 6 equally divided points of the longitudinal beam axes on both sides of the center line of the inner bridge are used as control points, and the three-dimensional coordinates of each control point are measured.

In the reconstruction method of the orthotropic steel bridge deck, when measuring each control point on the longitudinal beam of each segment of the old bridge structure on site, establish a coordinate system with the plane where the longitudinal beam is located, and measure from the end beam to the middle beam along the axis of the longitudinal beam, The distance between each control point and the control point on the end beam is provided on site.

In the modification method of the orthotropic steel bridge deck, when measuring the holes on the beam of the old bridge structure on site as described in step C, measure from the center line of the bridge to both sides along the axis of the beam on the top surface of the beam, and provide the distance between the holes and the center line of the bridge on the site. distance.

In the reconstruction method of the orthotropic steel bridge deck, when measuring the holes on the longitudinal beams of the sections of the old bridge structure described in step C, measure on the top surface of the longitudinal beams along the axis of the longitudinal beams from the end beams to the middle beams, The distance between each hole and the center line of the end beam is provided on site. The position and quantity of the holes on the beams and longitudinal beams of the old bridge structure are obtained by stakeout using the measured values provided by the site.

The transformation method of the orthotropic steel deck, the prefabricated orthotropic steel deck in step D is to divide each section of the orthotropic steel deck horizontally into 7 bridge deck blocks, and the construction site connection between the bridge deck blocks is removed from the bridge. Except for the welded connection of the face plate, the rest of the parts are bolted. Each orthotropic steel deck is equipped with 1 end beam, 5 intermediate beams and 8 longitudinal beams.

In the modification method of the orthotropic steel deck, the end beams and longitudinal beams of the modified orthotropic steel deck are respectively bolted to the beams and longitudinal beams of the old bridge structure through angle steel.

The beneficial effect of the present invention is that by adopting the systematic measurement control method, the deformation characteristics of the old bridge structure can be obtained effectively, and the actual line shape of the old bridge structure can be simulated, so as to determine the manufacturing line shape of the new structure, and realize the alignment of the new and old structures. Matching installation reduces the difficulty of installation and erection on the construction site and improves installation efficiency.

Description of drawings

Figure 1 is a measurement plan diagram of the main control points of the old bridge structure;

Figure 2 is a measurement plan diagram of the main control points of the old bridge structure section, and it is also an enlarged view of part a circled by the dotted line in Figure 1;

Figure 3 is a cross-sectional view of an orthotropic steel deck renovation project;

In the picture:

DP, prefabricated orthotropic steel deck;

EG, prefabricated deck end beams;

a, b, c, d, e, f, g, deck blocks of prefabricated orthotropic steel decks;

0, 1, 2, ... I, I+1, the beam of the old bridge structure;

A, B, C, D, new and old bridge structure longitudinal girders bolted together by angle steel;

P, P1, P2 measure control points.

detailed description

The specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings. The basic innovation point of bridge deck reconstruction is to replace the original concrete deck with a new orthotropic steel deck. After many years of operation, the old bridge structure will have various deformations, such as side bending, camber, length and spacing changes of beams, longitudinal beams and other components, so it is necessary to carefully study the connection with the new orthotropic steel deck. According to the characteristics of the old bridge structure, accurate and effective measurement and control methods are formulated to obtain the actual alignment of the old bridge structure, so as to determine the manufacturing alignment and manufacturing process plan of the new orthotropic steel deck, and ensure the matching connection of the new and old structures.

1, the reconstruction method of orthotropic steel bridge deck, its feature comprises the following steps:

A. Formulate the measurement plan for the main control points of the old bridge structure, so as to obtain the overall alignment of the old bridge structure;

As shown in Figure 1, the control point P of the bridge is selected as the control point from the center line of the bridge and the intersection of the longitudinal beam A axis on both sides of the bridge center line and the 0, 1, 2, ... I center line of each segment beam as the control point, and the control points of each control point P are measured. 3D coordinate value.

B. Formulate the measurement plan for the control points of each section of the old bridge structure, so as to obtain the main control dimensions of each section of the old bridge structure;

As shown in Figure 2, the measurement control points for the alignment of each segment of the old bridge structure are selected from the intersecting point P1 of the longitudinal girder A-D axes on both sides of the bridge centerline in the segment and the center line of the beam I and I+1 at the node, and the bridge in the segment The six equally divided points P2 of the axes A to D of the longitudinal beams on both sides of the center line are used as control points, and the three-dimensional coordinates of each control point are measured.

C. According to the type and size of the existing holes, newly made holes and/or drilling holes to be used in the matching connection between the new and old structures, formulate the position plan of the holes on the beams and longitudinal beams of the old bridge structure;

When measuring the holes on the beam of the old bridge structure on site, measure from the center line of the bridge to both sides along the axis of the beam on the top surface of the beam, and provide the distance between each hole and the center line of the bridge on site. When measuring the holes on the longitudinal beams of each segment of the old bridge structure on site, measure on the top surface of the longitudinal beams along the axis of the longitudinal beams from the end beam to the middle beam, and provide the distance between each hole and the center line of the end beam on site. The position and quantity of the holes on the beams and longitudinal beams of the old bridge structure are obtained by stakeout using the measured values provided by the site.

D. The prefabricated orthotropic steel deck DP and the old bridge structure are bolted together through angle steel.

As shown in Figure 3, the prefabricated orthotropic steel deck DP is to divide each section of orthotropic steel deck into seven deck blocks a, b, c, d, e, f, g, and the deck blocks The construction site connections between bridge decks are welded connections, and the rest of the parts are bolted connections. Each orthotropic steel deck DP has 1 end beam, 5 middle beams and 8 longitudinal beams.

The end beams EG and longitudinal beams A to D of the reconstructed orthotropic steel deck DP are respectively bolted to the beams I and longitudinal beams A to D of the old bridge structure through angle steel.

Claims (9)

1. The transformation method of orthotropic steel bridge deck, its feature comprises the following steps: A. Formulate the measurement plan for the main measurement control point P of the whole bridge of the old bridge structure, so as to obtain the overall alignment of the old bridge structure; B. Formulate the measurement plan for the measurement control points P1/P2 of each segment of the old bridge structure, so as to obtain the main control dimensions of each segment of the old bridge structure; C. According to the type and size of the existing holes, newly made holes and/or drilled holes on the construction site that need to be used when the new and old structures are matched and connected, the location plan of the holes on the beams and longitudinal beams of the old bridge structure shall be formulated on site; D. The prefabricated orthotropic steel deck (DP) and the old bridge structure are bolted together through angle steel. 2. according to the transformation method of the described orthotropic steel bridge deck of claim 1, it is characterized in that: the measurement control point P of the whole bridge overall alignment of the old bridge structure described in step A selects the bridge centerline and the longitudinal beams on both sides of the bridge centerline (A) The intersection of the axis and the midline of each segment beam (0, 1, 2, ... I) is used as the measurement control point, and the three-dimensional coordinate value of each measurement control point P is measured. 3. according to the transformation method of the described orthotropic steel bridge deck of claim 2, it is characterized in that: when on-the-spot surveys each measurement control point P on the structural beam of the old bridge, set up the coordinate system with the plane where the beam is located, along the axis of the beam from the bridge centerline Measure to both sides, and provide the distance between each measurement control point and the center line of the bridge on site. 4. according to the transformation method of the described orthotropic steel bridge deck of claim 1, it is characterized in that: the measurement control point P1/P2 of each section line shape of the old bridge structure described in step B, selects two bridge centerlines in the section The intersection point P1 of the axis of the side longitudinal beam (A～D) and the center line of the beam (I, I+1) at the node, and the six equal points P2 of the axis of the longitudinal beams (A～D) on both sides of the bridge center line in the segment are taken as the measurement control points , to measure the three-dimensional coordinates of each measurement control point. 5. according to the transformation method of the described orthotropic steel bridge deck of claim 4, it is characterized in that: when measuring the control points P1/P2 on each section stringer of the old bridge structure on the spot, set up the coordinate system with the plane where the stringer is located , measured from the end beam to the middle beam along the axis of the longitudinal beam, and the distance between each measurement control point and the measurement control point on the end beam is provided on site. 6. according to the transformation method of the described orthotropic steel bridge deck of claim 1, it is characterized in that: the on-the-spot measurement of step C formulates the position scheme of each hole on the old bridge structure beam is: on-site measurement of each hole on the old bridge structure beam , measure from the centerline of the bridge to both sides along the axis of the beam on the top surface of the beam, and provide the distance from each hole to the centerline of the bridge on site. 7. according to the transformation method of the described orthotropic steel bridge deck of claim 1, it is characterized in that: the on-the-spot measurement of step C formulates the position scheme of each hole on the longitudinal beam of the old bridge structure is: on-site measurement of each section of the old bridge structure For each hole on the longitudinal beam, measure on the top surface of the longitudinal beam along the axis of the longitudinal beam from the end beam to the middle beam, provide the distance between each hole and the center line of the end beam on site, and use the measured values provided on site to stake out the old bridge structure The position and quantity of each hole on the beam and longitudinal beam. 8. according to the transformation method of the described orthotropic steel bridge deck of claim 1, it is characterized in that: the described prefabricated orthotropic steel deck (DP) of step D is that every section of orthotropic steel deck is divided into 7 horizontally The bridge deck blocks (a, b, c, d, e, f, g), the construction site connections between the bridge deck blocks are bolted except for the bridge deck which is welded, and each section of orthotropic steel deck ( DP) Set 1 end beam, 5 middle beams and 8 longitudinal beams. 9. according to the transformation method of the described orthotropic steel bridge deck of claim 8, it is characterized in that: the end beam (EG) of the orthotropic steel deck (DP) of transformation, longitudinal beam (A～D) respectively and old The beams (I) and longitudinal beams (A-D) of the bridge structure are bolted together by angle steel.