CN113106867A - Accurate adjustment and alignment connection construction method for arch segment air attitude - Google Patents
Accurate adjustment and alignment connection construction method for arch segment air attitude Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention discloses an arch segment air attitude precise adjustment alignment connection construction method, which relates to the technical field of bridge construction and comprises the following steps: s1: installing a joint flange plate and a guide tenon at the end part of the hoisting section, hoisting the hoisting section, and butting the joint flange plate with the flange plate of the installed section; s2: installing a process bolt on each chord of the hoisting segment, adjusting the process bolts at corresponding positions according to the deviation value of the current coordinate of the control point of the hoisting segment and the design coordinate of the control point, S3: installing a jack and a reverse supporting plate, and adjusting the deviation value of the current coordinate of the control point of the hoisting section and the coordinate design target of the control point through the jack and a process bolt; s4: and welding the locking hoisting section and the installed section. The invention provides an arch segment air attitude precise adjustment, alignment and connection construction method, which adopts the primary positioning of a process bolt and the precise positioning of a jack to realize the rapid and precise positioning construction of an arch rib.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to an arch segment air attitude precise adjustment alignment connection construction method.
Background
The installation of the main arch ring of the steel pipe concrete arch bridge is one of key procedures, and the conventional construction method of the main arch ring comprises three methods of segmental hoisting, integral lifting, integral longitudinal rotation and the like, wherein the segmental hoisting is a method with the highest use frequency and the widest application range. When the main arch ring is hoisted in sections, the positioning installation of each section plays a key role in the full-bridge linear control, and the conventional method for positioning and installing the arch rib hoisting sections is an arch rib cable wind auxiliary installation positioning method or a positioning support method.
(1) Cable wind auxiliary type installation location
After the arch rib segments are hoisted to the installation positions, the arch rib segments are preliminarily butted through the guide falcon or the chain hoist, then the cable wind ropes are hung at the front ends of the hoisting segments and anchored on cable wind ridges arranged on two sides of the bridge positions, and then the arch rib segments are installed and positioned by tightening the cable wind ropes.
(2) Method of positioning a stent
And manufacturing a positioning support according to the inclination angle of the arch rib hoisting section, installing the positioning support at the front end or the rear end joint of the arch rib, and adjusting the positioning support to realize the installation and positioning of the hoisting section.
Such a method has the following problems: (1) aiming at the problem that cable wind ground anchors of arch ribs of a section with complex terrain conditions are difficult to arrange, when a main arch spans an existing road and is installed in a transverse cable wind auxiliary mode, the existing road needs to be sealed for management, and the passing of the existing road is influenced; (2) the arch rib positioning and mounting efficiency is limited by the positioning device and the transverse cable wind, and if the positioning device is too large and the cable wind is too long, a large amount of mounting time is needed for the auxiliary devices; (3) the cable wind force control difficulty is large, the cable wind force control is sensitive to the influence of natural conditions, the cable wind force is uneven after each segment is installed, transverse internal force is generated by the arch rib, and the distribution of the internal force of the arch rib is complex after the arch rib is closed.
Disclosure of Invention
The application aims to solve the problem that the positioning, mounting and construction operation of the arch rib is inconvenient in the prior art, and provides an arch segment air attitude precise adjustment alignment connection construction method which adopts the process bolt primary positioning and the jack precise positioning to realize the rapid and precise positioning construction of the arch rib.
In order to achieve the above object, the present application provides the following technical solutions: an arch segment air attitude precise adjustment alignment connection construction method comprises the following steps:
s1: installing a joint flange plate and a guide tenon at the end part of the hoisting section, hoisting the hoisting section according to the control point design coordinate of the hoisting section, and butting the joint flange plate with the flange plate of the installed section;
s2: installing a process bolt on each chord of the hoisting segment, and connecting the hoisting segment with the installed segment; adjusting the process bolts at corresponding positions according to the deviation value of the current coordinates of the control points of the hoisting sections and the design coordinates of the control points, so as to realize primary positioning;
s3: respectively installing a jack and a reverse supporting plate at the joints of the hoisting section and the installed section, and adjusting the deviation value of the current coordinate of the control point of the hoisting section and the coordinate design mark of the control point through the jack and the process bolt to realize accurate positioning;
s4: and welding and locking the hoisting section and the installed section to finish the installation of the hoisting section.
In the technical scheme, the process bolts arranged on the hoisting section and the joint flange of the installed section are used for realizing the primary positioning of the hoisting section and the installed section, then the jack and the process bolts are used for realizing the accurate positioning of the hoisting section and the installed section, a cable rope is not required to be additionally arranged, a positioning support is not required to be installed, the accurate positioning and installation of the hoisting section can be realized, the labor input is low, the efficiency is high, the method is simple, the influence of the installation accuracy of the auxiliary device is small, and meanwhile, the influence on the self structural internal stress of the arch rib is not generated. The method has simple construction process and wide application range.
Furthermore, each chord is provided with at least two process bolts, and the process bolts are all arranged on the outer side of each chord. It should be noted that the outer side of the chord refers to the outer side of the chord with respect to the inner part of the hoisting section.
Furthermore, each hoisting segment comprises a first chord, a second chord, a third chord and a fourth chord which are sequentially arranged from top left to bottom, top right to top left and bottom right to bottom right; the process bolt on the first chord is arranged on the left upper side of the first chord; the process bolt on the second chord is arranged on the upper right side of the second chord; the process bolt on the third chord is mounted on the left lower side of the third chord; the process bolt on the fourth chord is mounted on the lower right side of the fourth chord. Namely: according to the different positions of each chord member, the different positions of the process bolts arranged on each chord member are convenient for adjusting the hoisting sections, and meanwhile, the installation amount of the process bolts is reduced.
Further, in S2, during the initial positioning, the deviation value between the current coordinate of the control point of the hoisting section and the design coordinate of the control point is not greater than 3cm by adjusting the process bolt.
Further, the S2 specifically includes:
s21, enabling the process bolt to penetrate through the joint flange plate of the hoisting section and the flange plate of the installed section, and installing a nut to enable an adjusting gap not exceeding 2cm to be formed between the joint flange plate and the flange plate, so that the process bolt can conveniently adjust the hoisting section;
s22, measuring the current coordinates of the control points of the hoisting segments;
s23: and adjusting the process bolts at corresponding positions according to the deviation of the current coordinate of the control point and the design coordinate of the control point until the deviation of the current coordinate of the control point of the hoisting section and the design coordinate of the control point is not more than 3 cm.
Adjusting the process bolts according to the deviation of the actual position of the hoisting section and the designed control point coordinate, and selecting the process bolts on one or some chords according to the deviation direction of the hoisting section until the deviation of the actual position of the hoisting section and the designed control point coordinate is adjusted to be within 3cm, so that the subsequent accurate positioning is facilitated.
Further, in the step S3, during the accurate positioning, the deviation value between the current coordinate of the control point of the hoisting segment and the design coordinate of the control point is not greater than 1cm by using the jacking jack and the adjusting process bolt, so as to realize the accurate positioning.
Further, the S3 specifically includes:
s31, determining the position of the jack to be installed according to the deviation between the current coordinate of the control point of the hoisting section and the design coordinate of the control point;
s32, installing a counter-bracing plate and a jack at the joint of the hoisting segment and the joint of the installed segment respectively;
s33: and adjusting the jacks and the process bolts at corresponding positions according to the deviation of the current coordinate of the control point and the design coordinate of the control point until the deviation of the current coordinate of the control point of the hoisting section and the design coordinate of the control point is not more than 1 cm.
During accurate positioning, the jack is used as a main part, the adjusting is carried out on the principle that the process bolt is used as an auxiliary part, the adjusting is carried out according to the direction with larger deviation and the direction with smaller deviation, and the adjusting is carried out by a method of measuring and adjusting for multiple times, so that the accurate positioning is realized, and the reverse deviation of the arch rib caused by the overlarge single adjusting amplitude is avoided.
Further, in S4, the welding and locking the hoisting segment and the installed segment includes:
s41: welding code plates at the joint positions of the hoisting section and the installed section, and temporarily locking;
s42: welding the joint flange of the hoisting section and the flange of the installed section, and removing the stacking plate; and then the joint flange plate and the flange plate are connected through high-strength bolts in a locking mode.
The hoisting segment fixes the relative position of the hoisting segment and the installed segment through temporary locking, and the hoisting segment is prevented from being displaced or deviated in the welding process of a joint flange plate and a flange plate, so that the hoisting segment and the installed segment cannot be aligned to influence the fixation of the hoisting segment and the installed segment.
Further, the yard plates are welded outside the joint positions of the hoisting section and the installed section.
Furthermore, the joint flange plate and the flange plate are in synchronous butt joint and are circularly welded.
Compared with the prior art, the invention has the following beneficial effects:
the application discloses arch segment air attitude accurate adjustment counterpoint connection construction method adopts the technology bolt to realize the preliminary positioning of hoist and mount segment and installed segment, then adopts jack and technology bolt to realize the accurate positioning of hoist and mount segment and installed segment, need not to set up the cable wind rope in addition, also need not to install locating support. In addition, this application is according to the arch rib structural style of bridge at the different position installation process bolt of the steel pipe of constituteing the arch rib, and adjust different process bolt according to the deviation value of control point design coordinate and control point current coordinate and realize the adjustment of hoist and mount segmental, realize the accurate adjustment of hoist and mount segmental, reduce the regulating variable of hoist and mount segmental, improve the adjustment precision simultaneously, and in the adjustment process, hoist and mount segmental and installed segmental pass through process bolted connection all the time, realize hoist and mount segmental and fix a position in the adjustment process, avoid hoist and mount segmental skew, realize the quick, simple and easy, accurate positioning installation construction of arch rib.
According to the construction method for the accurate adjustment, alignment and connection of the air posture of the arch segment, the hoisting segment is adjusted in a matching mode by adopting the jack and the process bolt in the accurate adjustment process of the hoisting segment, the support plate and the back-up plate which are welded on the surface of the arch rib are used as counter-force devices of the jack, and a positioning support does not need to be additionally erected. The construction method for the accurate adjustment, alignment and connection of the air postures of the arch segments, disclosed by the invention, has the advantages of low labor input, high efficiency, simplicity, small influence on the installation precision of the auxiliary device, no influence on the internal structural stress of the arch ribs, simplicity in construction process and wide application range.
Drawings
FIG. 1 is a schematic flow chart of a construction method for accurately adjusting, aligning and connecting the aerial postures of arch segments disclosed by the invention;
FIG. 2 is a schematic view of the mounting structure of a process bolt in some embodiments of the invention;
FIG. 3 is a schematic illustration of the installation location of a process bolt in some embodiments of the invention;
FIG. 4 is a schematic view of the mounting structure of the jack according to some embodiments of the present invention;
FIG. 5 is a schematic illustration of the calculation of the adjustment of the process bolt and jack in some embodiments of the present invention;
FIG. 6 is a schematic view of the mounting structure of the code plate in some embodiments of the invention;
the hoisting method comprises the following steps of 1-hoisting sections, 11-joint flange plates, 12-falcon guiding, 13-first chord members, 14-second chord members, 15-third chord members, 16-fourth chord members, 2-installed sections, 21-flange plates, 3-process bolts, 4-jacks, 5-support plates, 6-reverse support plates and 7-stacking plates.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
In the existing hoisting technology of the main arch ring segment of the bridge, an arch rib cable wind auxiliary type installation positioning method or a positioning support method is usually adopted for positioning and installation of the arch rib segment, and the two methods need to additionally install a large-size auxiliary device, so that the cost is high, and the time consumption is long.
In order to solve the above technical problem, the inventor proposes a construction method for accurately adjusting, aligning and connecting an arch segment in the air, which includes the following steps with reference to fig. 1:
s1: installing a joint flange plate 11 and a falcon 12 at the end part of a hoisting section 1, hoisting the hoisting section 1 according to the control point design coordinate of the hoisting section 1, and butting the joint flange plate 11 with a flange plate 21 of an installed section 2;
s2: installing a process bolt 3 on each chord of the hoisting segment 1, and connecting the hoisting segment 1 with the installed segment 2; adjusting the process bolts 3 at corresponding positions according to the deviation value of the current coordinates of the control points of the hoisting sections 1 and the design coordinates of the control points, so as to realize primary positioning;
s3: a jack 4 and a back-up plate 6 are respectively installed at the joint of the hoisting section 1 and the installed section 2, and the deviation value of the current coordinate of the control point of the hoisting section 1 and the coordinate design target of the control point is adjusted through the jack 4 and the process bolt 3, so that accurate positioning is realized;
s4: and welding and locking the hoisting section 1 and the installed section 2 to finish the installation of the hoisting section 1.
It should be noted that the installed segment 2 is a rib segment that has been installed by hoisting in the previous segment, and the hoisting segment 1 is a rib segment to be installed by hoisting. Each of said arch rib segments comprises at least two chords and a connecting rod connecting the chords. The chord members and the connecting rods can be steel pipes.
It should be noted that the installation of the flange 21 and the installation of the falcon 12 are completed in the assembling field for the hoisting segment 1 and the installed segment 2, and the structural size and the welding seam flaw detection are checked and accepted, and then the hoisting segment is transferred to the hoisting field for hoisting. Threaded holes for installing the process bolts 3 are formed in the joint flange plate 11 of the hoisting section 1 and the flange plate 21 of the installed section 2. It should be noted that joint flanges 11 are mounted at two ends of each chord member of the hoisting segment 1; the two ends of the chord of the installed segment 2 are both provided with flanges 21, that is, each chord of the hoisting segment 1 is provided with at least one threaded hole for installing a process bolt 3.
In step S1, the hoisting segments 1 are assembled in the assembly yard, transferred to the assembly yard, and the center lines of the hoisting segments 1 are aligned with the center line of the cableway by the girder transporting vehicle; and then hoisting the hoisting segment 1 to an installation position according to the control point design coordinates of the hoisting segment 1, adjusting the posture of the hoisting segment 1 through a cableway, drawing the hoisting segment 1 to butt joint by taking a guide tenon 12 as a guide device, and butting the joint flange plate 11 of the hoisting segment 1 with the flange plate 21 of the installed segment 2.
In some embodiments, at least two of the process bolts 3 are mounted on each chord, and the process bolts 3 are mounted on the outside of each chord. The outer side of the chord refers to the outer side of the chord relative to the inner part of the hoisting segment 1, see fig. 2 and 3.
In some embodiments, each of the hoisting segments 1 comprises four chords, which are respectively a first chord 13, a second chord 14, a third chord 15 and a fourth chord 16, which are sequentially arranged at the upper left, the upper right, the lower left and the lower right, as shown in fig. 3; the process bolt 3 on the first chord 13 is arranged on the upper left side of the first chord 13; the process bolt 3 on the second chord 14 is arranged on the upper right side of the second chord 14; the process bolt 3 on the third chord 15 is arranged at the lower left side of the third chord 15; the process bolt 3 on the fourth chord 16 is mounted on the lower right side of the fourth chord 16. Namely: according to the position difference of each chord member, the positions of the process bolts 3 arranged on each chord member are different, so that the hoisting sections 1 can be conveniently adjusted, and meanwhile, the installation amount of the process bolts 3 is reduced.
In some embodiments, in the step S2, in the preliminary positioning, the deviation value between the current control point coordinates of the hoisting section 1 and the design control point coordinates is not greater than 3cm by adjusting the process bolt 3.
It should be noted that, in order to ensure that the process bolt 3 does not deform during the adjustment process, the process bolt 3 is adopted, the specification of which is that the process bolt 3 is matched with the flange bolt hole arranged on the joint flange plate 11/flange plate 21 connected with the chord member, the model is not less than M20, and the length is not less than 10cm, and the length of the process bolt 3 is suitable for the lengths of the joint flange plate 11 and the flange plate 21, that is: the length of the process bolt 3 after penetrating through the joint flange plate 11 and the flange plate 21 is preferably not less than 5cm, so that the process bolt is convenient to install and screw a nut.
It should be noted that, in the initial positioning, the installation and adjustment of the process bolt 3 can be realized by the following method:
s21, enabling the process bolt 3 to penetrate through the joint flange plate 11 of the hoisting section 1 and the flange plate 21 of the installed section 2, and installing a nut to enable an adjusting gap not exceeding 2cm to be formed between the joint flange plate 11 and the flange plate 21, so that the process bolt 3 can conveniently adjust the hoisting section 1;
s22, measuring the current coordinates of the control points of the hoisting section 1;
s23: and adjusting the process bolt 3 at the corresponding position according to the deviation of the current coordinate of the control point and the design coordinate of the control point until the deviation of the current coordinate of the control point of the hoisting section 1 and the design coordinate of the control point is not more than 3 cm.
It should be noted that, during initial positioning, the process bolts 3 are adjusted according to the deviation between the actual position of the hoisting segment 1 and the designed control point coordinate, and the process bolts 3 on one or some chords are selected according to the deviation direction of the hoisting segment 1 until the deviation between the actual position of the hoisting segment 1 and the designed control point coordinate is adjusted to within 3cm, so that subsequent accurate positioning is facilitated. In the specific implementation process, the installation position of the process bolt 3 may be determined according to the position of the chord, for example, for the upper chord arch rib chord positioned on the outer side of the line for the upper and lower chord dumbbell type truss arch, the process bolt 3 is only installed on the upper side of the line and the outer side of the line, and the installation position is referred to again in fig. 3.
It should be noted that, the adjusting method of the process bolt 3 is as follows: referring to fig. 3 again, the first chord 13, the second chord 14, the third chord 15 and the fourth chord 16 of the hoisting segment 1 are respectively provided with a process bolt 3: 1#, 2#, 3#, 4#, 5#, 6#, 7#, and 8 #. If the elevation of the current coordinate of the control point of the hoisting section 1 is lower than the elevation of the design coordinate of the control point, adjusting by screwing 1# and 2# or loosening 5# and 6 #; and if the elevation of the current coordinate of the control point of the hoisting section 1 deviates inwards from the design coordinate of the control point, adjusting by screwing 4# and 8# or loosening 3# and 7# until the coordinate deviation value of the arch rib control point is adjusted to be within 3 cm.
In some embodiments, in the step S3, in the precise positioning, the deviation value between the current control point coordinate of the hoisting section 1 and the design control point coordinate is not greater than 1cm through the jacking jack 4 and the adjusting process bolt 3, so as to achieve the precise positioning.
It should be noted that, when accurately positioning, the installation and jacking of the jack 4 and the adjustment of the process bolt 3 can be realized by the following methods:
s31, determining the position of the jack 4 to be installed according to the deviation between the current coordinate of the control point of the hoisting section 1 and the design coordinate of the control point;
s32, installing a counter-bracing plate 6 and a jack 4 at the joint of the hoisting segment 1 and the joint of the installed segment 2 respectively;
s33: and adjusting the jacks 4 and the process bolts 3 at corresponding positions according to the deviation of the current coordinate of the control point and the design coordinate of the control point until the deviation of the current coordinate of the control point of the hoisting section 1 and the design coordinate of the control point is not more than 1 cm.
It should be noted that, referring to fig. 4, the back-up plate 6 is welded on the surface of the chord member; the jack 4 is installed on the surface of the chord through a support plate 5 welded on the surface of the chord. Preferably, the sizes of the support plate 5 and the back-up plate 6 are both not less than 200 × 150 × 12mm steel plates; the welding length is not less than 20 cm. Further preferably, the support plate 5 and the back-up plate 6 are welded by girth welding.
Preferably, the jack 4 adopts a screw jack 4 with not less than 10 t.
It should be noted that the installation position of the jack 4 can be determined according to the following method: preferentially installing the position needing to be adjusted, and installing the jack 4 at other positions according to the adjustment requirement in the subsequent process, thereby reducing the installation amount of the jack 4. If the hoisting segment 1 deviates towards the inner side of the line, the jacks 4 are preferentially arranged at the inner side of the line, and then the installation positions and the installation quantity of other jacks 4 are determined according to the adjustment requirement.
When the precise positioning is carried out, taking fig. 3 as an example, the jack 4 at the inner side of the jacking line is used for jacking, and the two process bolts 3# 4 and # 8 at the inner side of the line are released simultaneously for adjustment; and simultaneously observing whether the 1# and 2# process bolts 3 and the 5# and 6# process bolts 3 limit the movement of the arch rib, and properly loosening the process bolts 3 to achieve the purpose of adjustment under the condition of ensuring small variation of the control point elevation if necessary.
It should be noted that, during accurate positioning, the jack 4 is used as a main part, the process bolt 3 is used as an auxiliary part for adjustment, adjustment is performed according to the direction with larger deviation and the direction with smaller deviation, and adjustment is performed by multiple measurement and adjustment methods, so that accurate positioning is realized, and the phenomenon that the arch rib is reversely deviated due to overlarge single adjustment amplitude is avoided.
It should be noted that, in this document, the process bolt 3 is used for preliminary adjustment, and then the jack 3 and the process bolt 3 are matched to perform precise adjustment, so as to achieve precise adjustment of the attitude of the hoisting section in the air. This is because, although the process bolt 3 can theoretically achieve accurate adjustment of the hoisting section, since the hoisting section 1 and the mounted section 2 have dimensional errors during the manufacturing process, the process bolt 3 is mounted through the threaded holes provided in the joint flange 11 of the hoisting section 1 and the flange 21 of the mounted section 2, and is greatly affected by the manufacturing errors of the joint flange 11 of the hoisting section 1 and the flange 21 of the mounted section 2; meanwhile, although the process bolts 3 are arranged in the hoisting section 1 in multiple directions, namely the upper direction, the lower direction, the left direction and the right direction, the flexibility of adjustment of the process bolts 3 is improved, the process bolts cannot be installed at any positions, and the positions of the process bolts are still fixed and are inconvenient to adjust. Therefore, the jack and the process bolt which can be installed at any position of the joint of the hoisting section 1 and the installed section 2 are adopted to accurately adjust, and the aerial posture of the hoisting section 1 can be accurately, quickly and stably adjusted.
It should be noted that the adjustment amount of the process bolt 3 and the jack 4 is calculated by the following method:
the hoisting segment 1 and the installed segment 2 are both long segments generally, and in order to adjust the coordinate deviation of the positioning point at the front end of the hoisting segment 1, the ratio between the adjustment amount of the position gap of the rear end joint and the adjustment amount of the coordinate needs to be determined. Referring to fig. 5, a dotted line is a theoretical position where the hoisting segment 1 needs to be installed, a solid line is an actual position of the hoisting segment 1, it can be seen that an edge slip angle AB is θ and an edge slip angle BF is ω in the graph, and using a similar theorem, it is not difficult to prove that ═ θ ═ ω. In the figure, D is a deviation value of an actually measured transverse bridge direction coordinate of the point A and a theoretical transverse bridge direction coordinate of the point A, L is a projected longitudinal bridge direction length of a horizontal plane of the hoisting section 1, L is a projected transverse bridge direction width of the horizontal plane of the hoisting section 1, and D is a point F adjustment amount at the rear end of the hoisting section 1. Assuming that the manufacturing error of the hoisting section 1 is 0, the coordinate deviation of the installed section 2 is 0, the hoisting section 1 has no integral transverse bridge offset, and the joints of the hoisting section 1 and the installed section 2 are completely fit without error, D ═ D/L × L can be easily deduced, so that the adjustment amount of the process bolt 3 or the jack 4 at the joint position in a theoretical state can be obtained.
It should be noted that the line is a line formed by connecting the design coordinates of the control points of the arch ring of the arch bridge, and the control points are points on the center line of the installed segment 2/hoisting segment 1.
In some embodiments, the welding locking the hoist segment 1 and the installed segment 2 in S4 includes:
s41: welding code plates 7 at the joint positions of the hoisting section 1 and the installed section 2, and temporarily locking;
s42: welding the joint flange 11 of the hoisting section 1 and the flange 21 of the installed section 2, and removing the stacking plate 7; the flange 11 and the flange 21 are then connected by high-tensile bolts.
The hoisting segment 1 fixes the relative position of the hoisting segment 1 and the installed segment 2 through temporary locking, so that the hoisting segment 1 and the installed segment 2 are prevented from being misaligned or deviated in the welding process of the joint flange plate 11 and the flange plate 21, and the hoisting segment 1 and the installed segment 2 cannot be aligned to influence the fixation of the hoisting segment 1 and the installed segment 2.
It should be noted that, referring to fig. 6, the code plate 7 is welded to the outer side of the joint position of the hoisting segment 1 and the installed segment 2.
Preferably, the joint flange 11 and the flange 21 are butt-jointed and cyclically welded synchronously.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An arch segment air attitude precise adjustment alignment connection construction method is characterized by comprising the following steps:
s1: installing a joint flange plate and a guide tenon at the end part of the hoisting section, hoisting the hoisting section according to the control point design coordinate of the hoisting section, and butting the joint flange plate with the flange plate of the installed section;
s2: installing a process bolt on each chord of the hoisting segment, and connecting the hoisting segment with the installed segment; adjusting the process bolts at corresponding positions according to the deviation value of the current coordinates of the control points of the hoisting sections and the design coordinates of the control points, so as to realize primary positioning;
s3: respectively installing a jack and a reverse supporting plate at the joints of the hoisting section and the installed section, and adjusting the deviation value of the current coordinate of the control point of the hoisting section and the coordinate design mark of the control point through the jack and the process bolt to realize accurate positioning;
s4: and welding and locking the hoisting section and the installed section to finish the installation of the hoisting section.
2. The arch segment aerial attitude precise adjustment, alignment and connection construction method according to claim 1, wherein at least two process bolts are mounted on each chord, and the process bolts are mounted on the outer side of each chord.
3. The arch segment aerial attitude precise adjustment alignment connection construction method according to claim 2, wherein each hoisting segment comprises a first chord, a second chord, a third chord and a fourth chord which are sequentially arranged from top left to top right, bottom left to bottom right; the process bolt on the first chord is arranged on the left upper side of the first chord; the process bolt on the second chord is arranged on the upper right side of the second chord; the process bolt on the third chord is mounted on the left lower side of the third chord; the process bolt on the fourth chord is mounted on the lower right side of the fourth chord.
4. The arch segment aerial attitude precise adjustment alignment connection construction method according to claim 1, wherein in the step S2, during initial positioning, a deviation value between a current coordinate of a control point of the hoisting segment and a design coordinate of the control point is not more than 3cm by adjusting the process bolt.
5. The arch segment aerial attitude precise adjustment, alignment and connection construction method according to claim 1, wherein the S2 specifically comprises:
s21, passing the process bolt through the joint flange of the hoisting section and the flange of the installed section, and installing a nut to ensure that an adjusting gap not exceeding 2cm is formed between the joint flange and the flange;
s22, measuring the current coordinates of the control points of the hoisting segments;
s23: and adjusting the process bolts at corresponding positions according to the deviation of the current coordinate of the control point and the design coordinate of the control point until the deviation of the current coordinate of the control point of the hoisting section and the design coordinate of the control point is not more than 3 cm.
6. The arch segment aerial attitude precise adjustment, alignment and connection construction method according to claim 1, wherein in the step S3, during precise positioning, a deviation value between a current coordinate of a control point of the hoisting segment and a design coordinate of the control point is not more than 1cm through a jacking jack and a regulating process bolt.
7. The arch segment aerial attitude precise adjustment, alignment and connection construction method according to claim 1, wherein the S3 specifically comprises:
s31, determining the position of the jack to be installed according to the deviation between the current coordinate of the control point of the hoisting section and the design coordinate of the control point;
s32, installing a counter-bracing plate and a jack at the joint of the hoisting segment and the joint of the installed segment respectively;
s33: and adjusting the jacks and the process bolts at corresponding positions according to the deviation of the current coordinate of the control point and the design coordinate of the control point until the deviation of the current coordinate of the control point of the hoisting section and the design coordinate of the control point is not more than 1 cm.
8. The arch segment aerial attitude precise adjustment and alignment connection construction method according to any one of claims 1 to 7, wherein in the step S4, the welding and locking the hoisting segment and the installed segment comprises:
s41: welding code plates at the joint positions of the hoisting section and the installed section, and temporarily locking;
s42: welding the joint flange of the hoisting section and the flange of the installed section, and removing the stacking plate; and then the joint flange plate and the flange plate are connected through high-strength bolts in a locking mode.
9. The arch segment aerial attitude precise adjustment alignment connection construction method according to claim 8, wherein the code plate is welded to the outer side of the joint position of the hoisting segment and the installed segment.
10. The arch segment aerial attitude precise adjustment, alignment and connection construction method according to claim 8, wherein the joint flange plate and the flange plate are synchronously butt-jointed and circularly welded.
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