Device and construction method for assembling steel box arch segments

Abstract

The present invention discloses a device for assembling steel box arch segments, comprising: four alignment devices, through which the steel box arch segments to be assembled are docked with the assembled steel box arch segments via the outside of the four alignment devices; two first adjustment devices, which are used to adjust the height position of the steel box arch segments to be assembled; a second adjustment device, which is used to adjust the gap at the docking point between the assembled steel box arch segments and the steel box arch segments to be assembled; the present invention also discloses a construction method for assembling steel box arch segments. The present invention uses the alignment devices to play a role of limiting and guiding when assembling the steel box arch segments to be assembled, thereby improving the docking accuracy. During the assembly process, the steel wire rope of the hoisting system is always kept in a stressed state, carrying a part of the load of the steel box arch segments to be assembled, and assisting the first adjustment device and the second adjustment device to adjust the position of the steel box arch segments to be assembled, thereby reducing the difficulty of adjustment and improving construction efficiency.

Description

Technical Field

[0001] The present invention relates to the field of steel structure technology, and more particularly to a device and construction method for assembling steel box arch segments. Background Art

[0002] A steel box arch is a main load-bearing member with a box-shaped steel structure in a steel box arch bridge. It transmits the load to the piers and foundations. In the construction of steel box arches, for components with smaller spans, they are usually assembled on-site in advance and then hoisted as a whole. This method has the characteristics of high construction efficiency and controllable splicing quality. However, for steel box arches with larger spans, it is difficult to use the construction method of completing the assembly on-site in advance and then hoisting as a whole. To reduce construction risks, it is usually installed by setting up assembly brackets at the projection position of the steel box arch and assembling them in sections. However, this construction method has the following disadvantages:

[0003] (1) The hoisting system is used to control the falling position of the steel box arch segment to be assembled and dock it with the assembled steel box arch segment. The docking accuracy is low, and the docking position is prone to large gaps, serious misalignment, and large tilt angles.

[0004] (2) After the steel box arch section reaches the assembly bracket, its position is difficult to adjust by external forces such as hand hoists due to the influence of its own weight. The adjustment is difficult and time-consuming. Summary of the Invention

[0005] Another object of the present invention is to provide a device and construction method for assembling steel box arch segments. During the assembly process of the steel box arch segments to be assembled, the docking accuracy is improved by a positioning device, and the steel wire rope of the lifting system is always kept under stress, which assists in adjusting its position, reduces the difficulty of adjustment, and improves construction efficiency.

[0006] In order to achieve these objects and other advantages according to the present invention, there is provided an apparatus for assembling steel box arch segments, comprising:

[0007] Four alignment devices, one end of which is respectively arranged on the four inner side walls of the assembled steel box arch segment, and the other end extends outward from the outside of the assembled steel box arch segment. The steel box arch segment to be assembled is lifted by the lifting system to one end thereof and is sleeved on the outside of the four alignment devices to dock with the assembled steel box arch segment;

[0008] Two first adjusting devices are arranged at intervals below the preset positions of the steel box arch segments to be assembled along the length direction of the steel box arch, and are used to adjust the height positions of the steel box arch segments to be assembled;

[0009] The second adjusting device is connected to the assembled steel box arch segment and the steel box arch segment to be assembled, and is used to adjust the gap at the joint between the assembled steel box arch segment and the steel box arch segment to be assembled;

[0010] During the assembly process of the steel box arch segments to be assembled, the steel wire ropes of the hoisting system are always under stress.

[0011] Preferably, any positioning device includes a fixed plate, one end of which is detachably arranged in the middle of the inner wall of the assembled steel box arch segment, and the other end is fixedly connected to one end of the limiting plate, the other end of the limiting plate extends outward from the outside of the assembled steel box arch segment, and the limiting plate is inclined toward the direction of the central axis of the assembled steel box arch segment.

[0012] Preferably, the angle between the fixing plate and the limiting plate is 130° to 150°.

[0013] Preferably, any first adjustment device includes an assembling bracket with multiple jacks on the top, the fixed end of any jack is set on the assembling bracket, the telescopic end is set vertically upward, and the multiple jacks are distributed on both sides of the joint between the assembled steel box arch segment and the steel box arch segment to be assembled.

[0014] Preferably, the second adjustment device includes four first I-beams, which are symmetrically arranged on the two opposite inner walls of the assembled steel box arch segments; four second I-beams, which are symmetrically arranged on the two opposite inner walls of the steel box arch segments to be assembled, and are arranged corresponding to the four first I-beams, and any first I-beam is connected to the corresponding second I-beam through a hand hoist.

[0015] Preferably, the two first I-beams located on the same inner side wall are symmetrically arranged on both sides of the fixing plate.

[0016] Preferably, the first adjusting device further comprises a plurality of steel pads, which are arranged on the top of the assembling bracket and corresponding to the plurality of jacks.

[0017] Preferably, it also includes an annular elastic airbag, the two ends of which are respectively mounted on the assembled steel box arch segment and the steel box arch segment to be assembled. The curvature of the annular elastic airbag is the same as the curvature of the steel box arch. The annular elastic airbag is made of a transparent material with a smooth outer surface.

[0018] A construction method for assembling steel box arch segments comprises the following steps:

[0019] Step S1, prefabrication of steel box arch segments;

[0020] When processing the steel box arch segment, install the alignment device on the steel box arch segment in advance;

[0021] Step S2: installing the first regulating device;

[0022] Install the assembly brackets and jacks according to the pre-assembly positions of the steel box arch segments to be assembled;

[0023] Step S3: coarse adjustment of the steel box arch segments to be assembled;

[0024] Start the hoisting system to lift the steel box arch segment to be assembled, and dock it with the assembled steel box arch segment through the alignment device; adjust the jack to contact the bottom of the steel box arch segment to be assembled, and complete the rough adjustment of the steel box arch segment to be assembled;

[0025] Step S4: fine-tuning the steel box arch segments to be assembled;

[0026] The tilt angle and staggered position of the steel box arch segment to be assembled are adjusted by the jack to adjust the height position of the steel box arch segment to be assembled to meet the setting requirements; the hand hoist is installed to adjust the gap at the joint of the steel box arch segment to be assembled and the assembled steel box arch segment by the hand hoist to adjust the steel box arch segment to be assembled to the preset position, and the fine adjustment is completed;

[0027] Step S5: Install the steel plate, remove the jack, and loosen the wire rope of the lifting system;

[0028] Step S6: Weld the joints between the steel box arch segment to be assembled and the assembled steel box arch segment, remove the alignment device, the first adjustment device and the second adjustment device, and proceed to the construction of the next steel box arch segment to be assembled.

[0029] Preferably, before step S4, the annular elastic airbag is installed on the assembled steel box arch segments and the steel box arch segments to be assembled, and the adjustment process of the inclination angle of the steel box arch segments to be assembled is observed by the annular elastic airbag to assist in adjusting the height position of the steel box arch segments to be assembled.

[0030] The present invention has at least the following beneficial effects:

[0031] 1. The present invention uses the alignment device to play a limiting and guiding role when assembling the steel box arch segments to be assembled, thereby improving the docking accuracy. During the assembly process, the steel wire rope of the hoisting system is always kept in a stressed state, bearing part of the load of the steel box arch segments to be assembled, assisting the first adjustment device and the second adjustment device to adjust the position of the steel box arch segments to be assembled, reducing the difficulty of adjustment and improving construction efficiency.

[0032] 2. The alignment device and the second adjustment device of the present invention are both detachably connected to the steel box arch segments by bolts, and the devices can be recycled, thus reducing construction costs;

[0033] 3. The hand chain hoist of the present invention is arranged inside the steel box arch segment, which is convenient for adjusting the position of the steel box arch segment to be assembled and can also ensure the safety of the construction workers in high-altitude operations.

[0034] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a front structural schematic diagram of a device for assembling steel box arch segments according to one embodiment of the present invention;

[0036] Figure 2 Schematic diagram of the structure of the alignment device of the present invention;

[0037] Figure 3 Schematic diagram of the structure of the first regulating device of the present invention;

[0038] Figure 4 is a schematic structural diagram of the second regulating device of the present invention;

[0039] Figure 5 Schematic diagram of the structure of the annular elastic airbag of the present invention;

[0040] Figure 6 This is a schematic structural diagram of the present invention in which the inclination angle of the steel box arch segments to be assembled is relatively small;

[0041] Figure 7 This is a schematic diagram of the structure of the steel box arch segments to be assembled in the present invention with a relatively large inclination angle;

[0042] Figure 8 This is a structural schematic diagram of the steel box arch segments to be assembled in the present invention at the lower staggered position;

[0043] Figure 9 This is a structural schematic diagram of the steel box arch segments to be assembled in the present invention at the upper staggered position;

[0044] Description of the accompanying drawings:

[0045] 1. Assembly bracket; 101. Pad beam; 102. Steel column; 103. Horizontal connecting rod; 104. Longitudinal connecting rod; 105- Main beam; 106. Jack; 2. Assembled steel box arch segments; 201. Inner wall of assembled steel box arch segments; 3. Steel box arch segments to be assembled; 4. Positioning device; 401. Limiting plate; 402. Fixing plate; 5. Annular elastic airbag; 6. Steel wire rope; 7. First I-beam; 8. Second I-beam; 801. First hand chain hoist; 802. Second hand chain hoist; 803. Third hand chain hoist; 804. Fourth hand chain hoist. DETAILED DESCRIPTION

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0047] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] like Figure 1-9 As shown, the present invention provides a device for assembling steel box arch segments, comprising:

[0049] Four alignment devices 4, one end of which is respectively arranged on the four inner side walls of the assembled steel box arch segment 2, and the other end extends outward from the outside of the assembled steel box arch segment 2. The steel box arch segment 3 to be assembled is lifted by the lifting system to one end thereof and is sleeved on the outside of the four alignment devices 4 to dock with the assembled steel box arch segment 2;

[0050] Two first adjusting devices are arranged at intervals below the preset position of the steel box arch segments 3 to be assembled along the length direction of the steel box arch, and are used to adjust the height position of the steel box arch segments 3 to be assembled;

[0051] The second adjusting device is connected to the assembled steel box arch segment 2 and the steel box arch segment 3 to be assembled, and is used to adjust the gap at the joint between the assembled steel box arch segment and the steel box arch segment 3 to be assembled;

[0052] During the assembly process of the steel box arch segments 3 to be assembled, the steel wire ropes 6 of the hoisting system are always in a stressed state.

[0053] In the above technical solution, if Figure 1 As shown, the hoisting system hoists and lifts the steel box arch segment 3 to be assembled to one of its ports and sleeves it on the outside of the four alignment devices 4 to dock with the assembled steel box arch segment. The alignment device 4 can play a role of limiting and guiding when assembling the steel box arch segment 3 to be assembled, thereby improving the docking accuracy. After the docking is completed, the height position of the steel box arch segment 3 to be assembled can be adjusted by the first adjusting device to further correct the inclination angle and the misaligned position, and the gap at the docking point can be adjusted by the second adjusting device to adjust the steel box arch segment 3 to the preset position. During the assembly process, the steel wire rope 6 of the hoisting system is always kept in a stressed state, carrying part of the load of the steel box arch segment 3 to be assembled, assisting the first adjusting device and the second adjusting device to adjust the position of the steel box arch segment 3 to be assembled, thereby reducing the difficulty of adjustment and improving construction efficiency.

[0054] In another technical solution, any positioning device 4 includes a fixing plate 402, one end of which is detachably arranged in the middle of the inner wall of the assembled steel box arch segment, and the other end is fixedly connected to one end of the limiting plate 401, and the other end of the limiting plate 401 extends outward from the outside of the assembled steel box arch segment, and the limiting plate 401 is inclined toward the direction of the central axis of the assembled steel box arch segment.

[0055] In this technical solution, if Figure 2 As shown, the four fixing plates 402 are respectively arranged against the four inner walls of the assembled steel box arch segment to evenly distribute the four alignment devices 4 on the inner wall 201 of the assembled steel box arch segment. The limiting plate 401 is inserted into the interior of the steel box arch segment 3 to be assembled when the steel box arch segment 3 to be assembled is assembled, and plays the role of limiting guide; the limiting plate 401 is arranged to be inclined in the direction of the central axis of the assembled steel box arch segment, so that the four limiting plates 401 gradually limit the position of the assembled steel box arch segment during the docking process of the steel box arch segment 3 to be assembled and the assembled steel box arch segment, thereby improving the docking accuracy; the fixing plate 402 is detachably connected to the assembled steel box arch segment by bolts, so that the alignment device 4 can be reused, thereby reducing construction costs.

[0056] In another technical solution, the angle between the fixing plate 402 and the limiting plate 401 is 130° to 150°.

[0057] In this technical solution, the fixing plate 402 is arranged against the inner wall 201 of the assembled steel box arch segment and is parallel to the central axis of the assembled steel box arch segment. The angle between the fixing plate 402 and the limiting plate 401 is set to 130°~150°, that is, the angle between the limiting plate 401 and the central axis of the assembled steel box arch segment is 130°~150°. Within this angle range, during the docking process, the limiting plate 401 is not easy to contact the inside of the steel box arch segment 3 to be assembled, thereby hindering the insertion of the steel box arch segment 3 to be assembled. At the same time, it can also play a role of gradual limiting to ensure the docking accuracy.

[0058] In another technical solution, any first adjustment device includes an assembling bracket 1, on the top of which are provided a plurality of jacks 106, the fixed end of any jack 106 is set on the assembling bracket 1, the telescopic end is set vertically upward, and the plurality of jacks 106 are distributed on both sides of the joint between the assembled steel box arch segment and the steel box arch segment 3 to be assembled.

[0059] In this technical solution, if Figure 3As shown, the first adjusting device is placed on the bridge deck. After the docking is completed, the lifting height of the jack 106 is first adjusted to contact the bottom of the steel box arch segment 3 to be assembled, and the steel box arch segment 3 to be assembled is stabilized on the assembly bracket 1. Then, according to the situation of the docking, the jack 106 is lifted or lowered to correct the tilt angle and the misalignment position; multiple jacks 106 are distributed on both sides of the docking, among which the jack 106 located below the assembled steel box arch segment is in contact with the bottom of the assembled steel box arch segment, playing a role in supporting and stabilizing the assembled steel box arch segment and ensuring construction safety; the assembly bracket 1 consists of two cushion beams 101, two main beams 105, and multiple transverse beams. The connecting rod 103, multiple longitudinal connecting rods 104 and multiple steel columns 102 are assembled, two cushion beams 101 are arranged horizontally at intervals, and two steel columns 102 are arranged vertically at intervals on the top of any cushion beam 101. The multiple steel columns 102 are connected as a whole through multiple transverse connecting rods 103 and multiple longitudinal connecting rods 104. The tops of two adjacent steel columns 102 are connected to the same main beam 105, and the jack 106 is set on the main beam 105. According to the height position of the steel box arch segment 3 to be assembled at different positions, the assembly bracket 1 of different heights and sizes can be assembled to cooperate with the jack 106 to adjust the position of the steel box arch segment 3 to be assembled.

[0060] In another technical solution, the second adjustment device includes four first I-beams 7, which are symmetrically arranged on the two opposite inner walls of the assembled steel box arch segments; four second I-beams 8, which are symmetrically arranged on the two opposite inner walls of the steel box arch segments 3 to be assembled, and are arranged corresponding to the four first I-beams 7, and any first I-beam 7 is connected to the corresponding second I-beam 8 through a hand hoist.

[0061] In this technical solution, if Figure 4 As shown, one side wall of any I-beam is set on the inner wall of the corresponding steel box arch segment by bolts, and the middle opening of the I-beam is used to connect with the hook of the hand hoist. The upper hook of the hand hoist is connected to the first I-beam 7, and the lower hook is connected to the second I-beam 8. By tightening the hand hoist, the steel box arch segment 3 to be assembled is driven to move toward the assembled steel box arch segment to narrow the gap at the joint; since the first I-beam 7 and the second I-beam 8 are located inside the steel box arch segment, the construction personnel can climb to the inside of the steel box arch segment to install the second adjustment device and adjust the gap through the hand hoist to ensure the personal safety of the construction personnel.

[0062] In another technical solution, the two first I-beams 7 located on the same inner side wall are symmetrically arranged on both sides of the fixing plate 402 .

[0063] In this technical solution, the two first I-beams 7 on any inner wall are symmetrically arranged on both sides of the fixed plate 402, so that the four hand hoists are evenly distributed, which makes it easier for construction workers to adjust the gap.

[0064] In another technical solution, the first adjusting device further includes a plurality of steel plates, which are arranged on the top of the assembling bracket 1 and corresponding to the plurality of jacks 106 .

[0065] In this technical solution, after the steel box arch segment 3 to be assembled is adjusted to a preset position, a steel pad can be inserted between the assembly bracket 1 and the steel box arch segment 3 to replace the jack 106 to prevent the jack 106 from being under long-term pressure, causing damage and resulting in accidents.

[0066] In another technical solution, an annular elastic airbag 5 is also included, whose two ends are respectively mounted on the assembled steel box arch segment 2 and the steel box arch segment 3 to be assembled. The curvature of the annular elastic airbag 5 is the same as the curvature of the steel box arch, and the annular elastic airbag 5 is made of a transparent material with a smooth outer surface.

[0067] In this technical solution, the annular elastic airbag 5 is provided with multiple ones according to the design requirements of the steel box arch, such as Figure 5 As shown, any annular elastic airbag 5 is provided with an inflation port, and when inflated, its curvature is the same as the curvature of the corresponding assembled steel box arch segment and the steel box arch segment 3 to be assembled. When the annular elastic airbag 5 is not inflated, one end of the annular elastic airbag 5 can be pre-mounted on the assembled steel box arch segment. After the docking is completed, the other end of the annular elastic airbag 5 is mounted on the steel box arch segment 3 to be assembled, and then the annular elastic airbag 5 is inflated so that the annular elastic airbag 5 is tightly mounted on the steel box arch. On the one hand, since the annular elastic airbag 5 wraps the gap between the steel box arch segment 3 to be assembled and the assembled steel box arch segment, when the construction personnel install the second adjustment device and adjust the gap, It can further improve the personal safety of construction workers; on the other hand, the annular elastic airbag 5 can also be used to assist construction workers in adjusting the tilt angle. Since the curvature of the annular elastic airbag 5 is the same as the curvature of the steel box arch and the outer surface is smooth, if the joint is tilted, the outer surface of the annular elastic airbag 5 will produce wrinkles under the action of the pressure of the steel box arch segment 3 to be assembled. External construction workers can quickly judge the tilt situation by observing the position of the wrinkles on the surface of the annular elastic airbag 5, shortening the judgment time. Moreover, the annular elastic airbag 5 is made of transparent material, and will not affect the external construction workers to further observe the tilt angle through the annular elastic airbag 5, thereby ensuring the accuracy of the judgment. The annular elastic airbag 5 is made of transparent silicone material.

[0068] The present invention also provides a construction method for assembling steel box arch segments, comprising the following steps:

[0069] Step S1, prefabrication of steel box arch segments;

[0070] When processing the steel box arch segment, a bolt hole is reserved on the inner wall of each steel box arch segment, and the alignment device 4 is pre-installed on the inner wall of the corresponding steel box arch segment by bolts;

[0071] Step S2: installing the first regulating device;

[0072] First, install the first steel box arch segment, then install the assembly bracket 1 and the jack 106 on the bridge deck at the projection position corresponding to the steel box arch segment 3 to be assembled, and adjust the jack 106 located under the first steel box arch segment to support the first steel box arch segment;

[0073] Step S3, coarse adjustment of the steel box arch segment 3 to be assembled;

[0074] The hoisting system is started to hoist the steel box arch segment 3 to be assembled until the end thereof without the alignment device 4 is sleeved on the four alignment devices 4 of the assembled steel box arch segment (the first steel box arch segment) and docked with the assembled steel box arch segment; the jack 106 is adjusted until its telescopic end contacts the bottom of the steel box arch segment 3 to be assembled, completing the rough adjustment of the steel box arch segment 3 to be assembled, and the steel wire rope 6 of the hoisting system is continuously kept under stress;

[0075] Step S4: fine-tuning the steel box arch segment 3 to be assembled;

[0076] Install the annular elastic airbag 5, and adjust the lifting height of the jack 106 again to adjust the inclination angle and staggered position of the steel box arch segment 3 to be assembled, until the height position of the steel box arch segment 3 to be assembled meets the setting requirements. The adjustment of the inclination angle can be observed through the annular elastic airbag 5; the construction personnel climb into the interior of the steel box arch segment to install the second adjustment device, and adjust the gap at the joint of the steel box arch segment 3 to be assembled and the assembled steel box arch segment through the hand hoist until the steel box arch segment 3 to be assembled is adjusted to the preset position, and the fine adjustment is completed;

[0077] The assembly position of the steel box arch segment 3 to be assembled is adjusted in the following order: first adjust the tilt angle, then adjust the offset position, and finally adjust the gap at the joint. The adjustment method of the tilt angle is as follows:

[0078] After the steel box arch segment 3 to be assembled is inserted into the alignment device 4, the inclination angle of the steel box arch segment 3 to be assembled may be too small or too large. If the inclination angle of the steel box arch segment 3 to be assembled is too small, such as Figure 6As shown, there will be a situation where the gap at the joint is larger at the top and smaller at the bottom. At this time, the lower surface of the annular elastic airbag 5 is squeezed by the steel box arch segment 3 to be assembled and wrinkles will appear to remind the construction workers to make timely adjustments. The construction workers lift the jack 106 on the right side of the steel box arch segment 3 to be assembled, raise the right part of the steel box arch segment 3 to be assembled, and correct the tilt angle by increasing the gap below and reducing the gap above. If the tilt angle of the steel box arch segment 3 to be assembled is too large, such as Figure 7 As shown, the gap at the joint will be smaller at the top and larger at the bottom. At this time, the upper surface of the annular elastic airbag 5 will be squeezed by the steel box arch segment 3 to be assembled, and wrinkles will appear to remind the construction workers to make timely adjustments. The construction workers lower the jack 106 on the right side of the steel box arch segment 3 to be assembled, lower the right part of the steel box arch segment 3 to be assembled, and correct the tilt angle by increasing the upper gap and reducing the lower gap.

[0079] The adjustment method of the misalignment position is as follows:

[0080] After the tilt angle is adjusted, the steel box arch segment 3 to be assembled may have two situations: upper misalignment and lower misalignment. Figure 8 As shown, if the lower misalignment occurs, the overall position of the steel box arch segment 3 to be assembled is biased downward, and the jack 106 located below the steel box arch segment 3 to be assembled is lifted at the same time to raise the overall steel box arch segment 3 to be assembled to correct the misalignment position; if the upper misalignment occurs, such as Figure 9 As shown, at this time, the overall position of the steel box arch segment 3 to be assembled is biased upward, so the jack 106 below the steel box arch segment 3 to be assembled is lowered at the same time to lower the steel box arch segment 3 to be assembled to correct the misaligned position;

[0081] The gap adjustment method of the joint is as follows:

[0082] like Figure 4 As shown, the four hand hoists are named the first hand hoist 801, the second hand hoist 802, the third hand hoist 803 and the fourth hand hoist 804 respectively. If the gap on the upper side of the joint is large, it is adjusted by tightening the third hand hoist 803 and the fourth hand hoist 804; if the gap on the lower side of the joint is large, it is adjusted by tightening the first hand hoist 801 and the second hand hoist 802; if the gap on the left side of the joint is large, it is adjusted by tightening the second hand hoist 802 and the fourth hand hoist 804; if the gap on the right side of the joint is large, it is adjusted by tightening the first hand hoist 801 and the third hand hoist 803.

[0083] Step S5: Install steel pads between the assembling bracket 1 and the assembled steel box arch segment and the steel box arch segment 3 to be assembled, remove the jack 106, and loosen the steel wire rope 6 of the lifting system to put the assembling bracket 1 in a fully stressed state;

[0084] Step S6, welding the joints of the steel box arch segment 3 to be assembled and the assembled steel box arch segment. After welding is completed, the alignment device 4, the second adjustment device and the first adjustment device under the assembled steel box arch segment are removed from the assembled steel box arch segment, and the removed first adjustment device is installed under the next steel box arch segment 3 to be assembled, and the removed second adjustment device is installed on the next steel box arch segment 3 to be assembled, and the construction of the next steel box arch segment 3 to be assembled is carried out, and the recycling of the device can also be realized at the same time; the alignment device 4 and the second adjustment device are removed by the construction personnel climbing into the steel box arch.

[0085] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A device for assembling steel box arch segments, characterized in that: include: Four alignment devices, one end of which is respectively arranged on the four inner side walls of the assembled steel box arch segment, and the other end extends outward from the outside of the assembled steel box arch segment. The steel box arch segment to be assembled is lifted to one end thereof by a hoisting system and is sleeved on the outside of the four alignment devices to dock with the assembled steel box arch segment; any alignment device includes a fixing plate, one end of which is detachably arranged in the middle of the inner side wall of the assembled steel box arch segment, and the other end is fixedly connected to one end of a limiting plate, the other end of the limiting plate extends outward from the outside of the assembled steel box arch segment, and the limiting plate is inclined toward the direction of the central axis of the assembled steel box arch segment; Two first adjusting devices are arranged at intervals below the preset positions of the steel box arch segments to be assembled along the length direction of the steel box arch, and are used to adjust the height positions of the steel box arch segments to be assembled; The second adjusting device is connected to the assembled steel box arch segment and the steel box arch segment to be assembled, and is used to adjust the gap at the joint between the assembled steel box arch segment and the steel box arch segment to be assembled; An annular elastic airbag, the two ends of which are respectively sleeved on the assembled steel box arch segment and the steel box arch segment to be assembled. The curvature of the annular elastic airbag is the same as the curvature of the steel box arch. The annular elastic airbag is made of a transparent material with a smooth outer surface; Among them, when the annular elastic airbag is not inflated, one end of the annular elastic airbag is pre-placed on the assembled steel box arch segment. After the docking is completed, the other end of the annular elastic airbag is placed on the steel box arch segment to be assembled, and the annular elastic airbag is inflated so that the annular elastic airbag is tightly placed on the steel box arch. The annular elastic airbag wraps the gap between the steel box arch segment to be assembled and the assembled steel box arch segment inside, which can improve the personal safety of the construction workers when they install the second adjustment device and adjust the gap; the annular elastic airbag is also used to assist the construction workers in adjusting the tilt angle. Since the curvature of the annular elastic airbag is the same as the curvature of the steel box arch and the outer surface is smooth, if the docking point is tilted, the outer surface of the annular elastic airbag will produce wrinkles under the action of the pressure of the steel box arch segment to be assembled. The external construction workers can judge the tilt by observing the position of the wrinkles on the surface of the annular elastic airbag; during the assembly process of the steel box arch segment to be assembled, the wire rope of the lifting system is always under stress.

2. The device for assembling steel box arch segments according to claim 1, characterized in that: The angle between the fixing plate and the limiting plate is 130° to 150°.

3. The device for assembling steel box arch segments according to claim 1, characterized in that: Any first adjustment device includes an assembly bracket with multiple jacks on the top. The fixed end of any jack is set on the assembly bracket, and the telescopic end is set vertically upward. The multiple jacks are distributed on both sides of the joint between the assembled steel box arch segment and the steel box arch segment to be assembled.

4. The device for assembling steel box arch segments according to claim 1, characterized in that: The second adjustment device includes four first I-beams, which are symmetrically arranged on the two opposite inner walls of the assembled steel box arch segment; four second I-beams, which are symmetrically arranged on the two opposite inner walls of the steel box arch segment to be assembled, and are arranged corresponding to the four first I-beams, and any first I-beam is connected to the corresponding second I-beam through a hand hoist.

5. The device for assembling steel box arch segments according to claim 4, characterized in that: The two first I-beams located on the same inner side wall are symmetrically arranged on both sides of the fixing plate.

6. The device for assembling steel box arch segments according to claim 3, characterized in that: The first adjusting device further includes a plurality of steel pads, which are arranged on the top of the assembling bracket and corresponding to the plurality of jacks.

7. A construction method for assembling steel box arch segments according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1, prefabrication of steel box arch segments; When processing the steel box arch segment, install the alignment device on the steel box arch segment in advance; Step S2: installing the first regulating device; Install the assembly brackets and jacks according to the pre-assembly positions of the steel box arch segments to be assembled; Step S3: coarse adjustment of the steel box arch segments to be assembled; Start the hoisting system to lift the steel box arch segment to be assembled, and dock it with the assembled steel box arch segment through the alignment device; adjust the jack to contact the bottom of the steel box arch segment to be assembled, and complete the rough adjustment of the steel box arch segment to be assembled; Step S4: fine-tuning the steel box arch segments to be assembled; The tilt angle and staggered position of the steel box arch segment to be assembled are adjusted by the jack to adjust the height position of the steel box arch segment to be assembled to meet the setting requirements; the hand hoist is installed to adjust the gap at the joint of the steel box arch segment to be assembled and the assembled steel box arch segment by the hand hoist to adjust the steel box arch segment to be assembled to the preset position, and the fine adjustment is completed; Step S5: Install the steel plate, remove the jack, and loosen the wire rope of the lifting system; Step S6: Weld the joints between the steel box arch segment to be assembled and the assembled steel box arch segment, remove the alignment device, the first adjustment device and the second adjustment device, and proceed to the construction of the next steel box arch segment to be assembled.

8. The construction method for assembling steel box arch segments according to claim 7, characterized in that: Before step S4, the annular elastic airbag is installed on the assembled steel box arch segments and the steel box arch segments to be assembled, and the adjustment process of the inclination angle of the steel box arch segments to be assembled is observed by the annular elastic airbag to assist in adjusting the height position of the steel box arch segments to be assembled.

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