CN109056548B - Steel arch construction method - Google Patents
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- CN109056548B CN109056548B CN201811094361.1A CN201811094361A CN109056548B CN 109056548 B CN109056548 B CN 109056548B CN 201811094361 A CN201811094361 A CN 201811094361A CN 109056548 B CN109056548 B CN 109056548B
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- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The invention belongs to the technical field of steel arches of arch bridges, and particularly relates to a steel arch construction method, which at least comprises the following steps: 1) assembling the steel arch, 2) installing the steel arch assembled in the step 1), 3) performing concrete pouring on a main arch ring of the steel arch installed in the step 2), and 4) dismantling the steel arch in the step 3); the invention solves the problems that in the prior art, under poor construction conditions of soft foundations, deep mountains and canyons and the like, construction of various span arch bridges constructed by a conventional scheme cannot meet construction requirements, and tie bar Berea steel arches cannot randomly adjust arch axis linearity and cannot adapt to construction requirements of various linear arch bridges.
Description
Technical Field
The invention belongs to the technical field of steel arches of arch bridges, and particularly relates to a steel arch construction method.
Background
The existing arch bridge has many methods for splicing the steel arch, such as a universal rod assembly method, but the construction period of the universal rod assembly is long, the construction process has great influence on the environment, and the construction is influenced by environmental factors such as flood season and the like, so that the construction is influenced.
Under the existing condition, under the poor construction conditions of soft foundations, deep mountains and canyons and the like, the construction of various span arch bridges constructed by the conventional scheme cannot meet the construction requirements.
Meanwhile, the existing tied bar Bailey steel arch center can not adjust the linearity of the arch axis at will and can not adapt to the construction requirements of various linear arch bridges.
Disclosure of Invention
The steel arch construction method provided by the invention aims to solve the problem that the construction of various span arch bridges constructed by a conventional scheme cannot meet the construction requirement under the poor construction conditions of soft foundations, deep mountains and canyons and the like in the prior art; the second purpose is to overcome the problems that the tied bar Bailey steel arch frame in the prior art can not adjust the arch axis linearity at will and can not adapt to the construction requirements of various linear arch bridges.
Therefore, the invention provides a steel arch construction method, which at least comprises the following steps:
1) the assembled steel arch center at least comprises the following steps: firstly, horizontally assembling the steel arch frame cross bridges according to groups; secondly, hoisting and erecting the horizontally assembled steel arch centering; finally, mounting deformed steel bars and distribution beams on the arch springing of the steel arch frame lifted and erected to complete assembly;
2) installing the steel arch frame assembled in the step 1), and at least comprising the following steps: firstly, mounting and positioning the steel arches group by group; secondly, fixing the arch springing of the positioned steel arch center; finally, sequentially laying a steel plate strip, a wedge-shaped steel plate, a transverse bridge direction square timber and a bottom die on the top of the steel arch from bottom to top, and mounting a side die on one side of the bottom die to finish mounting;
3) pouring concrete into the main arch ring of the steel arch centering installed in the step 2), and at least comprising the following steps: firstly, segmenting a main arch ring of a steel arch frame at equal intervals in the longitudinal direction, wherein the segmentation comprises the following steps: the two ends of the main arch ring are arch leg sections, the top end of the main arch ring is an arch top section, and a middle section is arranged between the arch leg sections and the arch top section (8); secondly, the main arch ring of the steel arch is cast in sections, and the sequence of the casting in sections is as follows: firstly, symmetrically pouring two arch foot sections at the same time, then pouring an arch top section, and finally symmetrically pouring two middle sections at the same time;
4) dismantling the steel arch centering in the step 3); at least comprises the following steps: firstly, fixedly mounting a sliding device and jacks on a bearing beam to ensure that all the jacks have the same height per two arch springing spans, and then dismantling a supporting piece between a distribution beam and the bearing beam; secondly, the jack is dropped to the lowest height, so that the distribution beam is dropped onto the sliding device; and finally, the jack is unloaded, and the sliding device is pulled to remove the steel arch frame.
The step 1) of horizontal assembling specifically comprises the following steps: firstly, proportionally releasing a large sample according to the linear level of an arch shaft catenary, determining the position and the rotation angle of each beret according to the large sample, and making a positioning clamp to form an assembly jig frame; secondly, assembling from one end arch springing of the steel arch frame to the other end arch springing direction, during assembling, connecting the lower chord between the standard sections of the steel arch frame by a Bailey pin, adjusting the arch frame line type between the upper chord members between the standard sections of the steel arch frame by a connecting member, assembling section by section, installing Bailey support frames on the assembled steel arch frame to complete assembling of one arch frame, and finally, repeating the steps to assemble a group of steel arch frames, wherein the proportion is 1:1, the group of arches is composed of at least three arches.
And 2) when the steel arch frames are installed and positioned group by group, after the first group is installed and positioned, arranging a plurality of transverse guy cables on the steel arch frames at equal intervals.
And (3) longitudinally fixing the arch springing of the steel arch centering in the step 2) by welding a small gantry on the distribution beam through channel steel, and transversely connecting the arch springing of the steel arch centering through a Bailey support frame.
And 2) adopting bamboo rubber plates for the bottom die and the side die, filling and adjusting gaps between the square timber and the steel arch frame and between the square timber and the bottom die by adopting wood wedges when laying steel plate strips, wedge-shaped steel plates and transverse bridge direction square timber and the bottom die, and reserving 3mm deformation for transverse splicing of the bottom die.
The specific division method of the segmentation in the step 3) comprises the following steps: the arch leg section is below 3L/16, the arch top section is above 3L/8, the middle section is 3L/16-3L/8, and L is the axial length of the steel arch frame; the pouring directions of the arch foot section, the arch top section and the middle section are all from bottom to top.
And inserting plates are adopted between the arch foot section and the middle section and between the arch top section and the middle section for concrete plugging, and the inserting plates are made of bamboo rubber plates.
And when the arch foot section is poured, a wood mould can be pressed on the arch foot section.
And 4) dismantling the steel arch frame in the step 4) needs to be carried out after the concrete strength of the main arch ring of the steel arch frame reaches 95%.
The invention has the beneficial effects that: the steel arch construction method provided by the invention has the advantages that a small number of specially-made special-shaped parts are adopted, the lower chord is connected by the Bailey pin, the arch line type is adjusted by the connecting rod piece between the upper chord rods, horizontal thrust is eliminated by fully and flexibly utilizing a finished Bailey beam and a horizontal pull rod, the tied Bailey steel arch is assembled, the steel arch construction method is suitable for construction of various span arch bridges which cannot be constructed by a conventional scheme under poor construction conditions such as a soft foundation, a deep mountain valley and the like, the arch line type is adjusted by adjusting the length of the connecting rod piece, and various arch bridge curve line types can be adjusted for construction requirements of various linear arch bridges.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a single span steel arch;
FIG. 2 is a schematic structural view of a steel arch springing;
FIG. 3 is a schematic structural view of a steel arch abutment limiting device;
FIG. 4 is a structural diagram of a process of dismantling a steel arch;
FIG. 5 is a plan view of a main arch ring of the steel arch frame for concrete segmental casting;
fig. 6 is a flow elevation of the main arch ring of the steel arch for concrete segmental casting.
Description of reference numerals: 1. deformed steel bar; 2. a distribution beam; 3. steel plate strips; 4. a wedge-shaped steel plate; 5. transverse bridge direction square timber; 6. bottom die; 7. a leg segment; 8. an arch top section; 9. a middle section; 10. a small gantry; 11. a spandrel girder; 12. a support member; 13. a sliding device; 14. a jack; 15. a bailey pin; 16. connecting the rod pieces.
Detailed Description
Example 1:
as shown in fig. 1-4, a steel arch construction method at least comprises the following steps:
1) the assembled steel arch center at least comprises the following steps: firstly, horizontally assembling the steel arch frame cross bridges according to groups; secondly, hoisting and erecting the horizontally assembled steel arch centering; finally, mounting the deformed steel bar 1 and the distribution beam 2 on the arch springing of the steel arch frame lifted and erected to complete the assembly;
2) installing the steel arch frame assembled in the step 1), and at least comprising the following steps: firstly, mounting and positioning the steel arches group by group; secondly, fixing the arch springing of the positioned steel arch center; finally, sequentially laying a steel plate strip 3, a wedge-shaped steel plate 4, a transverse bridge direction square timber 5 and a bottom die 6 on the top of the steel arch from bottom to top, and mounting a side die on one side of the bottom die to finish mounting;
3) pouring concrete into the main arch ring of the steel arch centering installed in the step 2), and at least comprising the following steps: firstly, segmenting a main arch ring of a steel arch frame at equal intervals in the longitudinal direction, wherein the segmentation comprises the following steps: the two ends of the main arch ring are arch springing sections 7, the top end of the main arch ring is an arch top section 8, and a middle section 9 is arranged between the arch springing sections 7 and the arch top section (8); secondly, the main arch ring of the steel arch is cast in sections, and the sequence of the casting in sections is as follows: firstly, symmetrically pouring two arch foot sections 7 at the same time, then pouring an arch top section 8, and finally symmetrically pouring two middle sections 9 at the same time;
4) dismantling the steel arch centering in the step 3); at least comprises the following steps: firstly, fixedly mounting a sliding device 13 and jacks 14 on a bearing beam 11, ensuring that the elevations of all the jacks 14 are consistent when two arch legs are spanned, and then dismantling a support 12 between a distribution beam 2 and the bearing beam 11; secondly, the jack 14 is dropped to the lowest height, so that the distribution beam 2 is dropped onto the sliding device 13; finally, the jack 14 is unloaded, and the sliding device 13 is pulled to remove the steel arch.
The steel arch frame construction method provided by the invention is suitable for construction of various span arch bridges which cannot be constructed by adopting a conventional scheme under poor construction conditions such as soft foundations, deep mountains and canyons.
Example 2:
on the basis of embodiment 1, the steel arch construction method at least comprises the following steps:
1) the assembled steel arch center at least comprises the following steps: firstly, horizontally assembling the steel arch frame cross bridges according to groups; secondly, hoisting and erecting the horizontally assembled steel arch centering; finally, mounting the deformed steel bar 1 and the distribution beam 2 on the arch springing of the steel arch frame lifted and erected to complete the assembly; the step 1) of horizontal assembling specifically comprises the following steps: firstly, proportionally releasing a large sample according to the linear level of an arch shaft catenary, determining the position and the rotation angle of each beret according to the large sample, and making a positioning clamp to form an assembly jig frame; secondly, assembling from one end arch springing of the steel arch frame to the other end arch springing direction, during assembling, connecting the lower chord between the standard sections of the steel arch frame by a Bailey pin 15, adjusting the arch frame line type between the upper chord between the standard sections of the steel arch frame by a connecting rod piece 16, completing assembling section by section, installing Bailey support frames on the assembled steel arch frame to complete assembling of one arch frame, and finally, repeating the steps to assemble a group of steel arch frames, wherein the proportion is 1:1, the group of arches is composed of at least three arches.
On a hardened field processed by a foundation, horizontally discharging 1:1 large samples according to the shape of an arch axis catenary line in advance, determining the specific position and rotation angle of each beret, making a positioning clamp to form an assembly jig frame, enabling the beret to be quickly positioned and conveniently connected, assembling from one end arch foot of the arch frame to the other end arch foot direction during assembly, directly connecting lower chords among standard segments by using a beret pin, adding a special connecting rod piece between upper chords to adjust the arch frame line shape, assembling section by section, mounting a 90cm beret support frame on the assembled arch frame after assembling one arch frame, then assembling another arch frame, then mounting a support frame, finally mounting one arch frame and three arch frames to form a group, then using a 50-ton crawler to lift and turn, erecting the horizontal arch frame, then mounting a deformed steel bar 1 and a distribution beam 2, wherein the deformed steel bar 1 is finish-rolled deformed steel bar, and the distribution beam 2 is a transverse double-assembled I12 distribution beam 12a, and then, pre-tensioning finish-rolled deformed steel bars, wherein the arch springing finish-rolled deformed steel bars need to be slowly and symmetrically pre-tensioned at a constant speed, the arch springing finish-rolled deformed steel bars are delivered to an installation site for installation after being assembled, the assembly is simple and rapid, the adaptability is strong, and the flatness and the elevation of the double-assembled I-shaped steel at the arch springing position must be ensured in the arch assembling process. The length of the arch springing segment is determined according to the length of the arch axis and the length of the Bailey sheet standard segment, the positioning of the arch springing segment is the key of the field installation of the steel arch frame, the position and the angle of the arch springing segment must be accurately positioned by measuring personnel during the installation, the elevation of the two arch springing segments is ensured to be consistent, and the elevation and the line shape of the arch frame are ensured to be consistent with the design.
2) Installing the steel arch frame assembled in the step 1), and at least comprising the following steps: firstly, mounting and positioning the steel arches group by group; secondly, fixing the arch springing of the positioned steel arch center; finally, sequentially laying a steel plate strip 3, a wedge-shaped steel plate 4, a transverse bridge direction square timber 5 and a bottom die 6 on the top of the steel arch from bottom to top, and mounting a side die on one side of the bottom die to finish mounting;
and 2) when the steel arch frames are installed and positioned group by group, after the first group is installed and positioned, arranging a plurality of transverse guy cables on the steel arch frames at equal intervals. 3 transverse cable wind ropes are respectively arranged at the upstream and the downstream of the steel arch frame and are respectively arranged at the positions of L/4, L/2 and 3L/4, and the transverse cable wind ropes are arranged to increase the stability of the steel arch frame and prevent the steel arch frame from generating displacement or deformation due to wind power or impact of hoisted objects and the like.
And (3) longitudinally fixing the arch springing of the steel arch centering in the step 2) by welding a small gantry 10 on the distribution beam by adopting channel steel, and transversely connecting the arch springing of the steel arch centering by adopting a Bailey support frame. The arch springing segment is guaranteed not to displace, the structure is simple, and the structure is stable after fixation.
And 2) adopting bamboo rubber plates for both the bottom die 6 and the side die, and filling and adjusting gaps between the square timber 5 and the steel arch frame and between the square timber 6 and the bottom die 6 by adopting wood wedges when laying the steel laths 3, the wedge-shaped steel plates 4, the square timber 5 and the bottom die 6, and reserving the transverse abutted seams of the bottom die 6 for setting 3mm deformation. And after the whole span steel arch is installed, laying a steel batten with the thickness of 2cm on the top of the steel arch, installing a wedge-shaped steel plate, placing transverse bridge direction square timbers, laying a bottom die bamboo plywood, and properly adjusting the laying of the bottom die when the elevation cannot meet the requirement. The bottom die 6 adopts a bamboo plywood with the thickness of 1.5cm and is paved on a square timber 5 of a distribution beam with the thickness of 10cm, the side die adopts a bamboo plywood with the thickness of 2cm, a square timber with the thickness of 10 multiplied by 10cm is directly paved on a steel arch centering formed by adjustment to be used as a template bottom beam, the middle spacing of the square timber is 30cm, and then the bamboo plywood of the bottom die is paved on the square timber; in the process of laying the formworks, lap joints of the square wood are nailed by nails, gaps among the square wood, the arch centering and the bottom formworks are strictly controlled, the gap positions can be tightly plugged and adjusted by wood wedges, the square wood is inspected one by one before being laid, irregular square wood is removed, the shape of the arch ring is ensured, the deformation of the bamboo plywood is reserved in the transverse splicing mode by 3mm, so that the phenomenon that the bamboo plywood extrudes and bulges in the normal deformation range of the steel arch centering to influence the shape of the concrete of the arch ring is avoided, the side formwork is installed in a side bottom wrapping mode, and the installation is carried out after the binding of reinforcing steel bars is finished.
3) Pouring concrete into the main arch ring of the steel arch centering installed in the step 2), and at least comprising the following steps: firstly, segmenting a main arch ring of a steel arch frame at equal intervals in the longitudinal direction, wherein the segmentation comprises the following steps: the two ends of the main arch ring are arch springing sections 7, the top end of the main arch ring is an arch top section 8, and a middle section 9 is arranged between the arch springing sections 7 and the arch top section (8); secondly, the main arch ring of the steel arch is cast in sections, and the sequence of the casting in sections is as follows (as shown in figures 5-6): firstly, symmetrically pouring two arch foot sections 7 at the same time, then pouring an arch top section 8, and finally symmetrically pouring two middle sections 9 at the same time; the specific division method of the segmentation in the step 3) comprises the following steps: the arch leg section 7 is below 3L/16, the arch top section 8 is above 3L/8, the middle section 9 is 3L/16-3L/8, and L is the axial length of the steel arch frame; the pouring directions of the arch foot section 7, the arch top section 8 and the middle section 9 are all from bottom to top. The main arch ring of the steel arch is longitudinally and sectionally cast with concrete, and is constructed according to the principle of longitudinal, transverse symmetry and balance, and in order to ensure that the steel arch can fully bear the force on the full section, the main arch ring of the steel arch is longitudinally divided into five large sections with equivalent length, namely an arch foot section (two sections), an arch top section (one section) and a middle section (two sections) when cast with concrete. The pouring sequence is that firstly pouring the arch leg sections (symmetrically and simultaneously pouring the two arch leg sections), pouring the arch corner sections immediately after finishing pouring, and finally pouring the middle section (symmetrically and simultaneously pouring the two middle sections), wherein the pouring direction of the arch leg sections is from bottom to top, the pouring direction of the arch leg sections is symmetrically carried out from the two arch legs of the arch ring to the midspan direction, the pouring direction of the middle section is from 3L/16 to 3L/8, and the concrete segmentation division method comprises the following steps: the arch leg section is below 3L/16, the arch top section is above 3L/8, the middle section is 3L/16-3L/8, and L is the axial length of the steel arch.
And inserting plates are adopted between the arch foot section 7 and the middle section 9 and between the arch top section 8 and the middle section 9 for concrete plugging, and the inserting plates are made of bamboo rubber plates. And determining boundary lines of the arch foot section and the middle section and boundary lines of the middle section and the arch top section through measurement lofting, and processing the inserting plates by using bamboo plywood to plug concrete so as to ensure that the joint surfaces of the two sections of concrete are vertical. And before the concrete in the middle section and the concrete in the vault section are jointed, the main reinforcement joint near the construction joint is not welded in advance, and the main reinforcement is welded before the concrete is poured to the construction joint. And (4) selecting the time when the air temperature is lowest or the air temperature begins to rise in the day to perform the closure of the main arch ring concrete. The observation of each monitoring point must be strengthened in the whole process of arch ring construction. After the arch ring is formed, the elevation control points and the elevation of the column base are measured, and the deformation of the steel arch frame and the arch ring is mastered.
When the arch foot section 7 is poured, a wood mould can be pressed on the arch foot section 7. When pouring the arch foot section, the wood formwork needs to be pressed upwards to prevent concrete from flowing to a low position due to the larger gradient.
4) Dismantling the steel arch centering in the step 3); at least comprises the following steps: firstly, fixedly mounting a sliding device 13 and jacks 14 on a bearing beam 11, ensuring that the elevations of all the jacks 14 are consistent when two arch legs are spanned, and then dismantling a support 12 between a distribution beam 2 and the bearing beam 11; secondly, the jack 14 is dropped to the lowest height, so that the distribution beam 2 is dropped onto the sliding device 13; finally, the jack (14) is unloaded, and the sliding device 13 is pulled to remove the steel arch frame. And 4) dismantling the steel arch frame in the step 4) needs to be carried out after the concrete strength of the main arch ring of the steel arch frame reaches 95%.
The concrete operation of dismantling the steel arch frame is as follows:
firstly, fixedly mounting a sliding device 13 and a jack 14 on a lower cross beam 11 of a distribution beam 2, and ensuring that the elevations of all the jacks 14 are consistent when two arch legs are spanned; fixing the steel arch frame with the upper beam, fixing the unloading device with the lower beam, wherein the unloading device is composed of I20a I-steel and
100 by 20mm steel pipes, 15 by 50 by 100mm steel plates are welded around the I20a to form a rectangular groove,
100mm by 20mm is put into the sliding device; after the main arch ring concrete is poured, monitoring points are longitudinally and transversely arranged on the top surface of the main arch ring, the elevation and the displacement of each section of the main arch ring are strictly monitored, and whether the appearance of the main arch ring concrete cracks or not is checked regularly; after the concrete strength reaches 95% of the designed strength, the arch base jacks are installed in place, the heights of all the jacks of every two arch springing spans are guaranteed to be consistent, the gap between the jacks and the arch springing 2I36a double-spliced I-steel distribution beam is controlled within 3mm, and the jacks are locked.
Then the supporting piece 12 between the distribution beam 2 and the bearing beam 11 is removed; secondly, the jack 14 is dropped to the lowest height, so that the distribution beam 2 is dropped onto the sliding device 13; the support between the 2I36a distribution beam and the 3I40a bearing beam is cut off, and the support is dismantled according to the principles of transverse symmetry and symmetry of two arch springs, so that the stress balance of the arch ring concrete and the steel arch frame is ensured, and transverse instability and longitudinal uneven stress are prevented; after the support piece is dismantled, checking whether the main arch ring concrete cracks or not, monitoring the change of a monitoring point of the main arch ring, and after determining that the main arch ring has no abnormal condition, continuing to carry out the unloading construction of the steel arch frame; reducing the tension of the transverse guy rope.
Finally, the jack 14 is unloaded, and the sliding device 13 is pulled to remove the steel arch. The pressure relief of the mechanical jack is carried out slowly according to the principle that the two arch legs are symmetrical in the horizontal direction, the pressure relief of all jacks of the two arch legs is ensured to be synchronous and at the same height, the elevation at two ends of the 2I36a distribution beam is monitored by a level gauge in the process, the synchronous pressure relief is achieved, and the arch frame is prevented from overturning; when the jack pressure relief begins, a specially-assigned person is arranged to check whether the main arch ring concrete at the arch crown is separated from the arch frame bottom die or not, and a monitoring record of a main arch ring monitoring point is made. After the main arch ring concrete is completely separated from the arch frame bottom die, increasing the monitoring frequency of a main arch ring monitoring point to ensure that the arch frame can be continuously unloaded after the main arch ring is not abnormally changed; releasing the pressure of the jack until the 2I36a distribution beam descends to the rolling device, and removing the bottom die and the square timber of the arch center; and performing transverse movement of the steel arch, splitting the steel arch outside the range of the main arch ring, hanging and transporting away the steel arches, and then sequentially and circularly performing transverse movement and dismantling operation of the arches until each steel arch is completely dismantled.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, if any, refer to an orientation or positional relationship based on that shown in the drawings, and do not refer to or imply that the referred devices or elements must have a particular orientation, configuration, and operation in a particular orientation, and thus, the terms describing a positional relationship in the drawings are used for illustrative purposes only and are not to be construed as limiting the present patent.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (6)
1. A steel arch construction method is characterized by at least comprising the following steps:
1) the assembled steel arch center at least comprises the following steps: firstly, horizontally assembling the steel arch frame cross bridges according to groups; secondly, hoisting and erecting the horizontally assembled steel arch centering; finally, mounting the deformed steel bar (1) and the distribution beam (2) on the arch springing of the steel arch frame lifted and erected to complete the assembly; the step 1) of horizontal assembling specifically comprises the following steps: firstly, proportionally releasing a large sample according to the linear level of an arch shaft catenary, determining the position and the rotation angle of each beret according to the large sample, and making a positioning clamp to form an assembly jig frame; secondly, assembling from one end arch springing of the steel arch frame to the other end arch springing direction, during assembling, connecting lower chords among standard sections of the steel arch frame by a Bailey pin (15), adjusting arch frame line types among upper chords among the standard sections of the steel arch frame by a connecting rod piece (16), assembling section by section, mounting Bailey support frames on the assembled steel arch frame to complete assembling of one arch frame, and finally, repeating the steps to assemble a group of steel arch frames, wherein the proportion is 1:1, the group of arch frames at least consists of three arch frames;
2) installing the steel arch frame assembled in the step 1), and at least comprising the following steps: firstly, mounting and positioning the steel arches group by group; secondly, fixing the arch springing of the positioned steel arch center; finally, sequentially laying a steel plate strip (3), a wedge-shaped steel plate (4), a transverse bridge direction square timber (5) and a bottom die (6) on the top of the steel arch from bottom to top, and mounting a side die on one side of the bottom die to finish mounting;
3) pouring concrete into the main arch ring of the steel arch centering installed in the step 2), and at least comprising the following steps: firstly, segmenting a main arch ring of a steel arch frame at equal intervals in the longitudinal direction, wherein the segmentation comprises the following steps: the two ends of the main arch ring are arch leg sections (7), the top end of the main arch ring is an arch top section (8), and a middle section (9) is arranged between the arch leg sections (7) and the arch top section (8); secondly, the main arch ring of the steel arch is cast in sections, and the sequence of the casting in sections is as follows: firstly, symmetrically pouring two arch foot sections (7) at the same time, then pouring an arch top section (8), and finally symmetrically pouring two middle sections (9) at the same time; the specific division method of the segmentation in the step 3) comprises the following steps: the arch leg section (7) is less than 3L/16, the arch top section (8) is more than 3L/8, the middle section (9) is 3L/16-3L/8, and L is the axial length of the steel arch; the pouring directions of the arch foot section (7), the arch top section (8) and the middle section (9) are all from bottom to top; concrete plugging is carried out between the arch foot section (7) and the middle section (9), and between the arch top section (8) and the middle section (9) by adopting inserting plates, and the inserting plates are made of bamboo rubber plates;
4) dismantling the steel arch centering in the step 3); at least comprises the following steps: firstly, both a sliding device (13) and jacks (14) are fixedly arranged on a bearing beam (11) to ensure that the elevations of all the jacks (14) are consistent when two arch legs are spanned, and then a support (12) between a distribution beam (2) and the bearing beam (11) is dismantled; secondly, the jack (14) is dropped to the lowest height, so that the distribution beam (2) is dropped onto the sliding device (13); finally, the jack (14) is unloaded, and the sliding device (13) is pulled to remove the steel arch frame.
2. The steel arch construction method according to claim 1, wherein: and 2) when the steel arch frames are installed and positioned group by group, after the first group is installed and positioned, arranging a plurality of transverse guy cables on the steel arch frames at equal intervals.
3. The steel arch construction method according to claim 1, wherein: and (3) the arch springing of the steel arch centering in the step 2) is longitudinally fixed by welding a small gantry (10) on the distribution beam by adopting channel steel, and the arch springing of the steel arch centering is transversely connected by adopting a Bailey support frame.
4. The steel arch construction method according to claim 1, wherein: and 2) adopting bamboo rubber plates for the bottom die (6) and the side die, and filling and adjusting gaps between the square timber (5) and the steel arch frame and the bottom die (6) by adopting wood wedges when laying the steel laths (3), the wedge-shaped steel plates (4), the transverse bridge square timber (5) and the bottom die (6), and reserving the transverse abutted seams of the bottom die (6) for 3mm deformation.
5. The steel arch construction method according to claim 1, wherein: when the arch foot section (7) is poured, a wood mould can be pressed on the arch foot section (7).
6. The steel arch construction method according to claim 1, wherein: and 4) dismantling the steel arch frame in the step 4) needs to be carried out after the concrete strength of the main arch ring of the steel arch frame reaches 95%.
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| CN110396943B (en) * | 2019-08-22 | 2024-02-27 | 中铁二十局集团第三工程有限公司 | Steel arch segmental moving and hoisting system and method for upper bearing arch bridge construction |
| CN110396942B (en) * | 2019-08-22 | 2024-02-27 | 中铁二十局集团第三工程有限公司 | Steel arch frame assembling and traversing system and method for upper bearing arch bridge construction |
| CN110438908B (en) * | 2019-08-22 | 2022-02-08 | 中铁二十局集团第三工程有限公司 | Deck-type box-type arch bridge reconstruction construction method |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3188342B2 (en) * | 1993-03-18 | 2001-07-16 | 株式会社鴻池組 | Tunnel construction method |
| KR20100074610A (en) * | 2008-12-24 | 2010-07-02 | 양효식 | Method for constructing arch-shaped concrete structure capable of collecting screen cast and arch-shaped structure constructed by the same |
| CN101769032B (en) * | 2009-12-28 | 2011-12-07 | 中国水电顾问集团华东勘测设计研究院 | Long-span suspended ceiling structure of underground plant and construction technology thereof |
| CN102839607B (en) * | 2012-09-18 | 2015-01-07 | 中交二公局第六工程有限公司 | Construction method for cantilever assembly steel arches for cast-in-situ large-span concrete arch bridge |
| CN106869960B (en) * | 2017-03-09 | 2019-06-04 | 洛阳理工学院 | It is a kind of using tunnel initial support invade limit section movement change arch device carry out changing arch method |
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