Construction method for sequential unfolding of super-high double-arch structure with unequal heights in stacked and spliced form

Abstract

The present invention discloses a construction method for sequential unfolding of unequal-height stacked splicing of a super-high double-arch structure, which includes the steps: 1. Assemble two arches (1) on the ground, and the bottoms of the two arches are located at the double-arch installation position; 2. Install a pin shaft node (2) between the bottom of the arch and the ground; 3. Support rods (3) are provided on both sides of the upper part of the arch, and the support rods are connected to the ground through pin shaft nodes; 4. Install climbing jacks (4) at the bottoms of the support rods, and the climbing jacks are hinged to both sides of the upper part of the arch; 5. The climbing jacks climb upward along the support rods, and the hinge joints on both sides of the upper part of the arch climb synchronously, the arch rotates upward, the support rods rotate downward, and a triangular statically determinate system is formed by the support rods, the ground and the arch; 6. Repeat step 5 until the arch rotates upward to the closing position; 7. Repeat steps 2-6 until both arches are in the closing position; 8. The two arches are closed to form a double-arch structure. The present invention can replace the steel structure of the arch assembled in the air, and has good economy.

Description

Technical Field

[0001] The present invention relates to a construction method for an arch, and particularly to a construction method for unfolding the super-high double-arch structure in a non-equal-height stacked sequence. Background Art

[0002] The arch structure is commonly used in architectural designs with unique shapes. As the height of the building structure increases, the height of the arch structure also increases accordingly. Currently, the common installation method for steel arch structures is in-situ scattered assembly. However, for super-high (greater than 100m) steel arch structures and double arches that need to be closed after installation, the difficulty of high-altitude assembly is great, the assembly accuracy cannot be guaranteed, the safety hazards are large, and it is necessary to set up falsework to assist the construction during the assembly process. At the same time, a large number of temporary support measures need to be adopted to ensure the safe construction of the steel double arch, resulting in high construction costs and poor economy. At the same time, the large amount of falsework and temporary support measures affects the construction progress. Therefore, there is a need to provide a construction method for unfolding the super-high double-arch structure in a non-equal-height stacked sequence that can replace the high-altitude scattered assembly of the arch steel structure and has good economy. Summary of the Invention

[0003] The purpose of the present invention is to provide a construction method for unfolding the super-high double-arch structure in a non-equal-height stacked sequence, which can replace the high-altitude scattered assembly of the arch steel structure and has good economy.

[0004] The present invention is implemented as follows:

[0005] A construction method for unfolding the super-high double-arch structure in a non-equal-height stacked sequence includes the following steps:

[0006] Step 1: Assemble two arches on the ground, and the bottoms of the two arches are respectively located at the bottom installation positions of the double arch.

[0007] Step 2: Install pin joints between the bottom of one arch and the ground respectively, so that the arch can rotate relative to the ground through the pin joints.

[0008] Step 3: Support rods are respectively set on both sides of the upper part of the arch, and the lower ends of the two support rods are rotatably installed on the ground through pin joints.

[0009] Step 4: Climbing jacks are respectively installed at the bottoms of the two support rods, and both sides of the upper part of the arch are respectively hinged to the two climbing jacks.

[0010] Step 5: The two climbing jacks respectively climb upward a first distance along the two support rods, and the hinge joints on both sides of the upper part of the arch climb synchronously with the climbing jacks, so that the arch rotates upward relative to the ground through the pin joints, and the support rods rotate downward relative to the ground through the pin joints, and a triangular statically determinate system is formed among the support rods, the ground and the arch.

[0011] Step 6: Repeat step 5 until the two climbing jacks climb to the highest distance. At this time, the arch is rotated upward and lifted to the closed position;

[0012] Step 7: Repeat steps 2 to 6 until both arches are in the closed position;

[0013] Step 8: Close the two arches to form a double arch structure, and remove the pin nodes and support rods.

[0014] In the step 1, two arches are stacked up and down.

[0015] In the step 3, the two support rods are located at 2 / 3 of the height of the arch, and the two support rods are symmetrically arranged about the central axis of the arch.

[0016] In step 3, the initial positions of the two support rods are in a vertical state perpendicular to the ground.

[0017] When the climbing jack climbs a first distance, the arch rotates 10° relative to the ground around the pin node.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts a climbing jack to climb along the support rod and drives the arch to move synchronously through the hinge. During the shape and size change of the triangular static system composed of the support rod, the arch and the ground, the arch is rotated upward relative to the ground and lifted, and the support rod is rotated downward relative to the ground, thereby ensuring the structural stability and reliability of the triangular static system, thereby achieving the safety of the arch rotation and lifting process. It can replace the existing in-situ scattered steel structure construction method, has higher construction efficiency, can meet the construction progress requirements, and has higher construction safety.

[0020] 2. The present invention adopts two arches stacked on the ground, which transfers a large number of high-altitude scattered steel structures to the ground, reduces the amount of high-altitude operations, and can ensure the assembly efficiency and assembly safety of the arches, as well as the assembly quality of the arches. The stacking method can reduce the requirements for the construction site area while ensuring the requirements for rotating jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a construction schematic diagram of steps 1 to 4 in the construction method of sequentially unfolding super-high double arch structures of unequal heights;

[0022] Figure 2 It is a construction schematic diagram of step 5 in the construction method of sequentially unfolding super-high double arch structures of unequal heights;

[0023] Figure 3It is the construction schematic diagram of step 6 in the construction method of sequential unfolding of unequal-height stacked super-high double-arch structures of the present invention;

[0024] Figure 4 It is the construction schematic diagram of step 7 in the construction method of sequential unfolding of unequal-height stacked super-high double-arch structures of the present invention.

[0025] In the figure, 1 is the arch, 2 is the pin joint, 3 is the support rod, and 4 is the climbing jack. Specific embodiments

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] A construction method for sequential unfolding of unequal-height stacked super-high double-arch structures includes the following steps:

[0028] Please refer to the attached Figure 1 , step 1: Assemble two arches 1 on the ground, and the bottoms of the two arches 1 are respectively located at the bottom installation positions of the double-arch.

[0029] Preferably, the two arches 1 are stacked up and down, reducing the requirements for the construction space.

[0030] Assembling two arches 1 on the ground transfers a large number of construction processes such as assembly and welding to the ground, which can avoid the inconvenience of in-situ assembling the arch steel structure at high altitude, reduce the construction difficulty, improve the arch assembly quality, assembly efficiency and construction safety, and ensure the construction progress.

[0031] Due to the relatively high height of the arch 1, the up-and-down stacking method for assembly can save ground space, especially suitable for construction conditions with limited construction space. Since the bottoms of the two arches 1 are respectively located at the bottom installation design positions of the double-arch, rotating and jacking the two arches 1 upward can meet the installation position requirements of the double-arch.

[0032] Step 2: Install pin joints 2 respectively between the bottom of one arch 1 and the ground, so that the arch 1 can rotate relative to the ground through the pin joints 2.

[0033] The bottom plate of the pin joint 2 is fixed on the ground, and the pin shaft of the pin joint 2 is rotatably inserted into the reserved hole at the bottom of the arch 1, so that the bottom of the arch 1 can rotate and jack upward relative to the ground around the pin joint 2, reducing the friction of the ground on the bottom of the arch 1, ensuring the smooth, stable and controllable rotation and jacking of the arch 1, and at the same time forming a limit for the bottom of the arch 1 to prevent accidental slipping of the arch 1 during the rotation and jacking process, resulting in construction safety accidents.

[0034] Step 3: Support support rods 3 respectively on both sides of the upper part of the arch 1, and the lower ends of the two support rods 3 are rotatably installed on the ground through pin joints 2.

[0035] Preferably, the two support rods 3 are located at 2 / 3 of the height of the arch 1, and the two support rods 3 are symmetrically arranged about the central axis of the arch 1.

[0036] Preferably, the initial position of the two support rods 3 (i.e., the position when the arch 1 has not started to rotate and lift) is in a vertical state perpendicular to the ground. At this time, a right triangle structure is formed among the support rod 3, the ground, and the arch 1. The angle between the support rod 3 and the ground can also be set to an acute angle slightly less than 90° according to construction requirements.

[0037] As a guiding and supporting component during the rotation of the arch 1, the bottom of the support rod 3 is installed through a pin joint 2. The bottom plate of the pin joint 2 is fixed on the ground. The pin of the pin joint 2 is rotatably inserted into the reserved hole at the bottom of the support rod 3, enabling the bottom of the support rod 3 to rotate downward relative to the ground around the pin joint 2, reducing the friction force of the ground on the bottom of the support rod 3, ensuring that the support rod 3 and the arch 1 rotate simultaneously and generate relative displacement, and the right triangle structure gradually changes into an acute triangle structure, thereby ensuring that the support rod 3 stably supports the arch 1 in real time, and further ensuring the stability and safety of the rotation and lifting of the arch 1.

[0038] Step 4: Install climbing jacks 4 at the bottoms of the two support rods 3 respectively, and the upper two sides of the arch 1 are respectively hinged to the two climbing jacks 4.

[0039] Preferably, the climbing jack 4 can adopt a hydraulic jack structure that can automatically climb up and down along the rod in the prior art, such as the jack structures with the publication numbers of CN2227642Y or CN2183986Y. Other models or forms of jack structures can also be selected according to actual construction conditions, load-bearing, etc. The climbing process of the climbing jack 4 along the support rod 3 and its working principle belong to the prior art and will not be elaborated here.

[0040] The climbing jack 4 can climb upward along the support rod 3. Since the upper two sides of the arch 1 are respectively hinged to the two climbing jacks 4, with the climbing of the climbing jack 4, it can drive the upper two sides of the arch 1 to move synchronously. The arch 1 and the climbing jack 4 can be hinged by means of snap rings, ball shafts, etc., which can meet the torsional function between the arch 1 and the climbing jack 4 when the triangle shape and size change, so as to ensure the angle and position changes between the arch 1 and the climbing jack 4 during their synchronous movement.

[0041] Please refer to the appendix Figure 2, Step 5: The two climbing jacks 4 climb upward along the two support rods 3 by a first distance respectively. The hinge joints on the upper sides of both sides of the arch 1 climb synchronously with the climbing jacks 4, causing the arch 1 to rotate upward relative to the ground through the pin joints 2, and the support rods 3 to rotate downward relative to the ground through the pin joints 2. A statically determinate triangular system is formed among the support rods 3, the ground, and the arch 1.

[0042] Preferably, when the climbing jack 4 climbs the first distance, the arch 1 rotates 10° relative to the ground around the pin joint 2. The rotation and lifting angle of the arch 1 each time can also be controlled according to the actual construction conditions to ensure construction safety.

[0043] As the climbing jack 4 climbs upward along the support rod 3, the hinge joints between the upper part of the arch 1 and the climbing jack 4 also climb upward along with the support rod 3, causing the arch 1 to rotate and lift upward. Since the bottom of the support rod 3 and the arch 1 are fixed to the ground through the pin joints 2 and cannot translate, the shape and size of the triangular structure gradually change, and the support rod 3 rotates downward. The statically determinate triangular system transfers the weight of the arch 1 to the ground, ensuring the relative rotational stability between the arch 1 and the support rod 3.

[0044] The statically determinate triangular system can maintain the relative stability of the arch 1 and the support rod 3. Only when the climbing jack 4 climbs, that is, when the vertex of the triangle moves, the lengths of the two sides of the triangle change, and the two base angles of the triangle change, so that a statically determinate triangular system is always maintained among the arch 1, the support rod 3, and the ground, thus ensuring the safety of the rotation and lifting of the arch 1.

[0045] Please refer to the appendix Figure 3 , Step 6: Repeat Step 5 until the two climbing jacks 4 climb to the maximum distance. At this time, the arch 1 rotates upward to the closing position.

[0046] The climbing distance of the climbing jack 4 is determined according to the closing position of the arch 1. Usually, when the arch 1 rotates 90° to the vertical state, it is the closing position. When selecting the support rod 3, its length should be longer than the climbing distance of the climbing jack 4.

[0047] Please refer to the appendix Figure 4 , Step 7: Repeat Steps 2 to 6 to make both arches 1 in the closing position, which is convenient for the closing of the two arches 1. At this time, the bottoms of the two arches 1 are located at the installation design positions of the double arch.

[0048] Step 8: Close the two arches 1 to form a double-arch structure, and disassemble the pin joints 2 and the support rods 3.

[0049] After the tops of the two arches 1 are joined together, the construction of the double-arch structure is completed, forming a stable structural system. By fixing the bottom of the double-arch to the ground, the connection between the arch 1 and the climbing jack 4 can be released, and the four support rods 3, the pin joints 2 at the bottom of the two arches 1, and the four support rods 3 can be removed.

[0050] In the construction project of a certain double-arch, the steel consumption of the double-arch reaches 1700 tons, and the height of the double-arch exceeds 100 meters. If the in-situ scattered assembly method is used for construction, the steel consumption of the lower temporary support measures reaches 300 tons. The steel consumption is too large, and the construction cost greatly exceeds the budget, and it also affects the construction progress of the project. After adopting the stacked assembly, unfolding, jacking and rotating construction method of the present invention, the two arches 1 are assembled on the ground, eliminating the need for a falsework for auxiliary assembly, ensuring the assembly accuracy, avoiding the safety hazards of high-altitude operations, and adopting the stacked assembly form, reducing the requirements for site space. At the same time, when the climbing jack 4 climbs along the support rod 3, it drives the arch 1 to rotate upward relative to the ground around the pin joint 2 at its bottom, and makes the support rod 3 rotate downward around the pin joint 2 at its bottom, ensuring that a stable triangular statically determinate system is always maintained among the arch 1, the support rod 3 and the ground. The support rod 3 made of a circular steel pipe with a cross-section of φ800*20mm can meet the requirements for the support and rotation jacking of this ultra-high arch, so as to ensure the stable rotation of the arch 1 to the closing position while ensuring construction safety, without the need to set up temporary support measures, greatly reducing the steel consumption, ensuring the construction progress, and having good economy.

[0051] The above are only the preferred embodiments of the present invention, and are not used to limit the protection scope of the invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method for sequential unfolding of super-high double-arch structures with unequal heights in stacked and spliced form, characterized by: The following steps are involved: Step 1: Assemble two arches (1) on the ground, with the bottoms of the two arches (1) respectively located at the bottom installation positions of the double arches; Step 2: installing a pin joint (2) between the bottom of an arch (1) and the ground, so that the arch (1) can rotate relative to the ground through the pin joint (2); Step 3: Support rods (3) are respectively arranged on both sides of the upper part of the arch (1), and the lower ends of the two support rods (3) are rotatably mounted on the ground through a pin joint (2); Step 4: Climbing jacks (4) are installed at the bottom of the two support rods (3), and the upper two sides of the arch (1) are respectively hinged on the two climbing jacks (4); Step 5: The two climbing jacks (4) respectively climb upwards a first distance along the two support rods (3), and the hinged nodes on both sides of the upper part of the arch (1) climb synchronously with the climbing jacks (4), so that the arch (1) rotates upward relative to the ground through the pin node (2), and the support rod (3) rotates downward relative to the ground through the pin node (2), so that a triangular statically determinate system is formed between the support rod (3), the ground and the arch (1); Step 6: Repeat step 5 until the two climbing jacks (4) have climbed to the highest distance, at which point the arch (1) is rotated upward and lifted to the closed position; Step 7: Repeat steps 2 to 6 until both arches (1) are in the closed position; Step 8: Close the two arches (1) to form a double arch structure, and remove the pin node (2) and support rod (3).

2. The construction method of unfolding the super-high double-arch structure with unequal heights in a stacked and sequential manner according to claim 1, characterized in that: In the step 1, two arches (1) are stacked up and down.

3. The construction method of sequentially unfolding the super-high double-arch structure with unequal heights according to the superposition sequence as claimed in claim 1, characterized in that: In the step 3, the two support rods (3) are located at 2 / 3 of the height of the arch (1), and the two support rods (3) are symmetrically arranged about the central axis of the arch (1).

4. The construction method of unfolding the super-high double-arch structure with unequal heights in a stacked and sequential manner according to claim 1 or 3, characterized in that: In the step 3, the initial positions of the two support rods (3) are in a vertical state perpendicular to the ground.

5. The construction method of unfolding the super-high double-arch structure with unequal heights in a stacked and sequential manner according to claim 1, characterized in that: When the climbing jack (4) climbs a first distance, the arch (1) rotates 10 degrees relative to the ground around the pin node (2).

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