WO2021000290A1 - Construction method for integral lifting of l-shaped bidirectional cantilever structure - Google Patents
Construction method for integral lifting of l-shaped bidirectional cantilever structure Download PDFInfo
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- WO2021000290A1 WO2021000290A1 PCT/CN2019/094564 CN2019094564W WO2021000290A1 WO 2021000290 A1 WO2021000290 A1 WO 2021000290A1 CN 2019094564 W CN2019094564 W CN 2019094564W WO 2021000290 A1 WO2021000290 A1 WO 2021000290A1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- the invention belongs to the technical field of integral lifting construction, and mainly relates to an integral lifting construction method of an L-shaped two-way cantilever structure.
- the degree of mechanization, automation and informatization of building construction is one of the important indicators of the level of building technology in a country or region.
- society the standards of people's pursuit of material culture have increased.
- Various types of buildings are developing higher and larger, while also pursuing artistic expression and visual impact.
- a large number of buildings are in a situation of complex structure and complex construction environment conditions, leading to a large number of engineering structures in my country still using extensive, labor-intensive, low-tech construction modes such as high-altitude bulk methods, which are time-consuming and labor-intensive, and construction quality and safety Sex is not easy to guarantee, and it is not commensurate with my country's status as a world power.
- the L-shaped two-way cantilever structure as a modern architectural structure, is increasingly used in the design of modern buildings to achieve excellent artistic expression.
- the construction environment is complicated.
- the existing technology still uses extensive construction modes such as high-altitude bulk methods, which are time-consuming and labor-intensive, and the construction quality and safety are not easy to guarantee.
- the efficiency is extremely low while accidents are prone, and there are major defects.
- the purpose of the present invention is to provide an L-shaped two-way cantilever structure integral lifting construction method in view of the defects of the existing method, which effectively solves the construction industry problems such as low efficiency and high accident rate in the construction of this type of structure in the prior art. , Safe, reliable, economical and practical.
- the L-shaped two-way cantilever structure is lifted into position and connected and fixed to complete the structural installation.
- the invention discloses a construction method for integral lifting of an L-shaped two-way cantilever structure.
- the L-shaped two-way cantilever structure is assembled on the ground in advance, and an assembled auxiliary structure is used according to the upper hanging point and the center of gravity of the L-shaped two-way cantilever structure. Adjust the center of gravity of the L-shaped two-way cantilever structure with temporary counterweights, so that the L-shaped two-way cantilever structure has good anti-overturning performance and stability during the lifting process.
- This construction method will cause many sources of danger and the construction environment. A large number of high-altitude operations with poor conditions are transformed into ground operations, which not only optimizes the construction environmental conditions, but also has a short construction period, high construction quality, and a safe and reliable construction process, thereby saving construction costs as a whole.
- a further improvement of the present invention is that the method further includes:
- a further improvement of the present invention is that the determination of the lifting point follows the following principles:
- the position of the upper lifting point is determined according to the total lifting weight, the reaction force of the lifting point and the lifting equipment, and the upper lifting point can maximize the envelope of the L-shaped The anchoring end of the two-way cantilever structure; this arrangement can reasonably arrange the upper hanging points to ensure that the L-shaped two-way cantilever structure is effectively supported during the ascent.
- a further improvement of the present invention is that the step of determining the position of the assembled auxiliary structure and the weight and position of the temporary counterweight includes:
- the weight of the temporary counterweight is combined with the weight of the structure to determine the weight of the temporary counterweight, so that L after the temporary counterweight is configured
- the structural center of gravity of the two-way cantilevered structure is in the figure formed by the upper hanging point envelope.
- the center of gravity of the L-shaped two-way cantilever structure and the center of gravity of the hanging point envelope graphics can be integrated, and the positions of the assembled auxiliary structure and the temporary counterweight and the corresponding counterweight weight can be reasonably configured, so that the L-shaped two-way cantilever
- the center of gravity of the structure is in the hanging point envelope graph, which greatly improves the stability and safety during the lifting process, and prevents the overturning accident of lifting.
- a further improvement of the present invention is that the assembled auxiliary structure is arranged between the nearest two points of the anchoring end of the L-shaped bidirectional cantilever structure.
- a further improvement of the present invention is that the fabricated auxiliary structure is a temporary truss structure that can be quickly installed and disassembled. Further, the rods of the fabricated truss structure are I-beams, and the assembled units are connected by bolts Through this arrangement, the prefabricated truss structure using I-beam as the rod has sufficient stability, and is convenient to be dismantled directly after construction, thereby improving construction efficiency.
- a further improvement of the present invention is that the temporary counterweight is fixed to the assembled auxiliary structure in an easily disassembled manner, and the temporary counterweight is a tower crane counterweight or a concrete pouring block, or adopts The traction provided by the winch facilitates disassembly and improves construction efficiency.
- a further improvement of the present invention is that the step of removing the temporary counterweight is to lower the tower crane counterweight or the concrete pouring block to the ground to remove it, or to unload the traction of the hoist.
- FIG. 1 is a schematic diagram of the steps of the overall lifting construction method of the L-shaped two-way cantilever structure described in the specific embodiment of the present invention
- FIG. 2 is a schematic diagram of the plane layout of the L-shaped bidirectional cantilever structure described in the specific embodiment of the present invention.
- FIG. 3 is a schematic diagram of the L-shaped two-way cantilever structure in the specific embodiment of the present invention for the overall lifting temporary counterweight and the layout of the lifting system equipment;
- Fig. 4 is a schematic diagram of the arrangement of the temporary counterweight on the assembled auxiliary structure in the specific embodiment of the present invention.
- this specific embodiment discloses an overall lifting construction method for an L-shaped two-way cantilever structure, which is suitable for the overall lifting construction of an L-shaped two-way cantilever structure as shown in Figure 2.
- the method includes the following step:
- the lifting point can only be placed at the two anchoring ends on the right and upper side of the L-shaped two-way cantilever structure to provide support.
- the number 11 is the location of the proposed lifting point for the overall lifting of the structure. This principle is adopted The arrangement of the hanging points can ensure that the L-shaped two-way cantilever structure is effectively supported during the ascent.
- the fabricated auxiliary structure 2 should be arranged along the straight line AD, and the concentrated load applied to adjust the center of gravity of the lifting structure should be applied at point P.
- the center of gravity of the adjusted lifting structure should be located within the envelope area ABCD of the lifting point, and it is assumed that the center of gravity of the adjusted lifting structure is just at the lifting point package
- the applied counterweight load is G 0 at this time.
- the applied counterweight load G P should satisfy:
- the structure should be adjusted after the focus O S, the center of gravity as close to the hanging points of the envelope pattern ABCD Q, when O S, and Q coincides lifting
- the stability during the process is the best, the weight that needs to be applied at this time:
- the counterweight 3 is suspended and temporarily fixed on the assembled auxiliary structure 2 with a hydraulic lifter 4, and the L-shaped two-way cantilever structure 1 is lifted into place and connected and fixed, and the hydraulic lifter 4 Conveniently remove the counterweight 3 and further remove the assembled auxiliary structure 2 to complete the entire installation process of the structure.
- the fabricated auxiliary structure 2 is a temporary truss structure that can be quickly installed and disassembled.
- the rods can be I-steel, and the assembled units are connected by bolts. Through this arrangement, the I-steel is used as the rod.
- the prefabricated truss structure has sufficient stability and is convenient to dismantle directly after construction, which improves construction efficiency.
- the temporary counterweight 3 can also be a tower crane counterweight or a concrete pouring block, or the traction provided by a hoist can be used to facilitate disassembly and improve construction efficiency.
- you can also Lower the tower crane counterweight or concrete pouring block to the ground for removal, or unload the traction of the hoist.
- the present embodiment discloses an integral lifting construction method for the L-shaped two-way cantilever structure.
- the L-shaped two-way cantilever structure is pre-assembled on the ground, and according to the lifting point and the center of gravity of the L-shaped two-way cantilever structure, an assembled auxiliary is used
- the structure and temporary counterweights adjust the center of gravity of the L-shaped two-way cantilever structure, so that the L-shaped two-way cantilever structure has good anti-overturning performance and stability during the lifting process.
- This construction method will cause more danger sources and construction
- a large number of high-altitude operations with harsh environmental conditions are transformed into ground operations, which not only optimizes the construction environmental conditions, but also has a short construction period, high construction quality, and a safe and reliable construction process, thereby saving construction costs as a whole.
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Abstract
Description
本发明属于整体提升施工技术领域，主要涉及一种L型双向悬挑结构整体提升施工方法。The invention belongs to the technical field of integral lifting construction, and mainly relates to an integral lifting construction method of an L-shaped two-way cantilever structure.
建筑施工的机械化、自动化和信息化程度是一个国家或地区建筑科技水平的重要标志之一。然而，随着社会发展，人们对物质文化的追求的标准提高，各类建筑在在向更高、更大发展的同时也更加追求艺术表现力和视觉冲击效果。使得大量建筑处于结构复杂、施工环境条件复杂的情况，导致我国大量工程结构仍然采用高空散装法等粗放式的、劳动密集型的、低技术水平的施工模式，耗时费力、且施工质量和安全性不易保证，与我国世界大国的地位很不相称。The degree of mechanization, automation and informatization of building construction is one of the important indicators of the level of building technology in a country or region. However, with the development of society, the standards of people's pursuit of material culture have increased. Various types of buildings are developing higher and larger, while also pursuing artistic expression and visual impact. As a result, a large number of buildings are in a situation of complex structure and complex construction environment conditions, leading to a large number of engineering structures in my country still using extensive, labor-intensive, low-tech construction modes such as high-altitude bulk methods, which are time-consuming and labor-intensive, and construction quality and safety Sex is not easy to guarantee, and it is not commensurate with my country's status as a world power.
其中，L型双向悬挑结构作为一种造型现代化的建筑结构，被越来越多的应用在现代建筑的设计中，以达到出色的艺术表现力，但对于这类结构复杂、施工环境条件复杂情况下的结构施工，现有技术仍然采用高空散装法等粗放式的施工模式，其耗时费力，且施工质量和安全性不易保证，在易发生事故的同时效率极低，存在较大缺陷。Among them, the L-shaped two-way cantilever structure, as a modern architectural structure, is increasingly used in the design of modern buildings to achieve excellent artistic expression. However, for this type of structure, the construction environment is complicated. In the case of structural construction, the existing technology still uses extensive construction modes such as high-altitude bulk methods, which are time-consuming and labor-intensive, and the construction quality and safety are not easy to guarantee. The efficiency is extremely low while accidents are prone, and there are major defects.
发明内容Summary of the invention
本发明目的在于针对现有方法的缺陷，提供一种L型双向悬挑结构整体提升施工方法，有效解决了现有技术中该类结构施工使用高空作业的低效率、高事故率等施工行业难题，安全可靠、经济实用。The purpose of the present invention is to provide an L-shaped two-way cantilever structure integral lifting construction method in view of the defects of the existing method, which effectively solves the construction industry problems such as low efficiency and high accident rate in the construction of this type of structure in the prior art. , Safe, reliable, economical and practical.
为解决上述技术问题，本发明通过以下方案进行实施：To solve the above technical problems, the present invention is implemented through the following solutions:
一种L型双向悬挑结构整体提升施工方法，其特征在于，包括以下步骤：A construction method for integral lifting of an L-shaped two-way cantilever structure is characterized in that it comprises the following steps:
确定L型双向悬挑结构的上吊点；Determine the lifting point of the L-shaped two-way cantilever structure;
在结构安装位置下方投影的地面或楼面拼装所述L型双向悬挑结构使之成为提升整体；Assemble the L-shaped two-way cantilever structure on the ground or floor projected below the structural installation position to make it a lifting whole;
通过重心分析公式对所述L型双向悬挑结构和所述上吊点进行分析，确定装配式辅助结构的位置和临时配重的重量及位置；所述临时配重用于调整所述L型双向悬挑结构的重心，以保证所述L型双向悬挑结构提升过程中的抗倾覆性能和稳定性；Analyze the L-shaped two-way cantilever structure and the upper hanging point through the center of gravity analysis formula to determine the position of the assembled auxiliary structure and the weight and location of the temporary counterweight; the temporary counterweight is used to adjust the L-shaped two-way suspension The center of gravity of the cantilever structure to ensure the anti-overturning performance and stability of the L-shaped two-way cantilever structure during the lifting process;
在所述L型双向悬挑结构上设置所述装配式辅助结构，并在所述装配式辅助结构上设置所述临时配重；Arranging the fabricated auxiliary structure on the L-shaped bidirectional cantilevered structure, and arranging the temporary counterweight on the fabricated auxiliary structure;
提升所述L型双向悬挑结构就位并连接固定，完成结构安装。The L-shaped two-way cantilever structure is lifted into position and connected and fixed to complete the structural installation.
与现有方法相比，本发明的有益方法效果如下：Compared with the existing method, the beneficial method effects of the present invention are as follows:
本发明公开的一种L型双向悬挑结构整体提升施工方法，先对L型双向悬挑结构在地面进行预先拼装，并根据上吊点和L型双向悬挑结构的重心，使用装配式辅助结构和临时配重对L型双向悬挑结构的重心进行调整，以使得L型双向悬挑结构在提升过程中的具有良好的抗倾覆性能和稳定性，这种施工方法将危险源多、施工环境条件恶劣的大量高空作业转化为地面作业，不但优化了施工环境条件，而且工期短，施工质量高，施工过程安全可靠，从而从总体上节约了施工成本。The invention discloses a construction method for integral lifting of an L-shaped two-way cantilever structure. The L-shaped two-way cantilever structure is assembled on the ground in advance, and an assembled auxiliary structure is used according to the upper hanging point and the center of gravity of the L-shaped two-way cantilever structure. Adjust the center of gravity of the L-shaped two-way cantilever structure with temporary counterweights, so that the L-shaped two-way cantilever structure has good anti-overturning performance and stability during the lifting process. This construction method will cause many sources of danger and the construction environment. A large number of high-altitude operations with poor conditions are transformed into ground operations, which not only optimizes the construction environmental conditions, but also has a short construction period, high construction quality, and a safe and reliable construction process, thereby saving construction costs as a whole.
本发明的进一步改进在于，该方法还包括：A further improvement of the present invention is that the method further includes:
完成结构安装后将所述装配式辅助结构和临时配重拆除。After the structural installation is completed, the assembled auxiliary structure and the temporary counterweight are removed.
本发明的进一步改进在于，所述上吊点的确定遵循以下原则：A further improvement of the present invention is that the determination of the lifting point follows the following principles:
在所述L型双向悬挑结构的锚固端根据提升总重、吊点反力和提升设备综合考虑确定所述上吊点的位置，并使得所述上吊点能够最大限度地包络所述L型双向悬挑结构锚固端；如此设置，可合理地布置上吊点，从而保证L型双向悬挑结构在上升过程中得到有效的支撑。At the anchor end of the L-shaped two-way cantilever structure, the position of the upper lifting point is determined according to the total lifting weight, the reaction force of the lifting point and the lifting equipment, and the upper lifting point can maximize the envelope of the L-shaped The anchoring end of the two-way cantilever structure; this arrangement can reasonably arrange the upper hanging points to ensure that the L-shaped two-way cantilever structure is effectively supported during the ascent.
本发明的进一步改进在于，所述确定装配式辅助结构的位置和临时配重的重量及位置的步骤包括：A further improvement of the present invention is that the step of determining the position of the assembled auxiliary structure and the weight and position of the temporary counterweight includes:
确定所述L型双向悬挑结构的结构重量和结构重心；Determine the structural weight and structural center of gravity of the L-shaped bidirectional cantilever structure;
确定所述上吊点包络形成的图形的吊点重心；Determining the center of gravity of the hanging point of the figure formed by the upper hanging point envelope;
在所述L型双向悬挑结构的锚固端之间确定所述装配式辅助结构的位置和所述临时配重的位置；Determining the position of the fabricated auxiliary structure and the position of the temporary counterweight between the anchoring ends of the L-shaped bidirectional cantilever structure;
根据所述结构重心、所述吊点重心和所述临时配重位置之间形成的力矩关系，结合所述结构重量，确定所述临时配重的重量，以使得配置了临时配重后的L型双向悬挑结构的结构重心处于所述上吊点包络形成的图形内。According to the moment relationship formed between the center of gravity of the structure, the center of gravity of the lifting point, and the position of the temporary counterweight, the weight of the temporary counterweight is combined with the weight of the structure to determine the weight of the temporary counterweight, so that L after the temporary counterweight is configured The structural center of gravity of the two-way cantilevered structure is in the figure formed by the upper hanging point envelope.
通过上述步骤，可综合L型双向悬挑结构的重心和吊点包络图形的重心，合理地配置装配式辅助结构和临时配重的位置以及相应的配重重量，从而让L型双向悬挑结构的重心处于吊点包络图形内，大大提高了提升过程中的稳定性和安全性，防止出现提升发生倾翻事故。Through the above steps, the center of gravity of the L-shaped two-way cantilever structure and the center of gravity of the hanging point envelope graphics can be integrated, and the positions of the assembled auxiliary structure and the temporary counterweight and the corresponding counterweight weight can be reasonably configured, so that the L-shaped two-way cantilever The center of gravity of the structure is in the hanging point envelope graph, which greatly improves the stability and safety during the lifting process, and prevents the overturning accident of lifting.
本发明的进一步改进在于，所述装配式辅助结构设置在所述L型双向悬挑结构的锚固端的最近的两点之间。A further improvement of the present invention is that the assembled auxiliary structure is arranged between the nearest two points of the anchoring end of the L-shaped bidirectional cantilever structure.
本发明的进一步改进在于，所述的装配式辅助结构是一种可快速安装拆卸的临时性桁架结构，进一步的，装配式桁架结构的杆件为工字钢，各拼装单元之间采用螺栓连接，通过这样设置，采用工字钢为杆件的装配式桁架结构具有足够的稳固性，且方便在施工后直接拆除，提高施工效率。A further improvement of the present invention is that the fabricated auxiliary structure is a temporary truss structure that can be quickly installed and disassembled. Further, the rods of the fabricated truss structure are I-beams, and the assembled units are connected by bolts Through this arrangement, the prefabricated truss structure using I-beam as the rod has sufficient stability, and is convenient to be dismantled directly after construction, thereby improving construction efficiency.
本发明的进一步改进在于，所述临时配重是以一种易拆卸的方式固定在所述装配式辅助结构上，进一步的所述临时配重为塔吊配重块或混凝土浇筑块体，或采用卷扬机提供的牵引力，以便于拆卸，提高施工效率。A further improvement of the present invention is that the temporary counterweight is fixed to the assembled auxiliary structure in an easily disassembled manner, and the temporary counterweight is a tower crane counterweight or a concrete pouring block, or adopts The traction provided by the winch facilitates disassembly and improves construction efficiency.
本发明的进一步改进在于，所述将所述临时配重拆除的步骤，即将所述的塔吊配重块或混凝土浇筑块体降至地面拆除，或对所述卷扬机牵引力进行卸载。A further improvement of the present invention is that the step of removing the temporary counterweight is to lower the tower crane counterweight or the concrete pouring block to the ground to remove it, or to unload the traction of the hoist.
图1为本发明具体实施方式中所述的L型双向悬挑结构整体提升施工方法的步骤示意图；FIG. 1 is a schematic diagram of the steps of the overall lifting construction method of the L-shaped two-way cantilever structure described in the specific embodiment of the present invention;
图2为本发明具体实施方式中所述的L型双向悬挑结构的平面布置示意图；2 is a schematic diagram of the plane layout of the L-shaped bidirectional cantilever structure described in the specific embodiment of the present invention;
图3为本发明具体实施方式中所述的L型双向悬挑结构整体提升临时配重及提升系统设备布置示意图；3 is a schematic diagram of the L-shaped two-way cantilever structure in the specific embodiment of the present invention for the overall lifting temporary counterweight and the layout of the lifting system equipment;
图4为本发明具体实施方式中所述的临时配重在装配式辅助结构上的设置示意图。Fig. 4 is a schematic diagram of the arrangement of the temporary counterweight on the assembled auxiliary structure in the specific embodiment of the present invention.
图中：In the picture:
10-既有建筑；1-L型双向悬挑结构；2-装配式辅助结构；11-吊点；3-临时配重；4-液压提升器。10-Existing buildings; 1-L-type two-way cantilever structure; 2-fabricated auxiliary structure; 11-lifting point; 3-temporary counterweight; 4-hydraulic lifter.
为了充分地了解本发明的目的、特征和效果，以下将结合附图与具体实施方式对本发明的构思、具体步骤及产生的方法效果作进一步说明。In order to fully understand the purpose, features, and effects of the present invention, the concept, specific steps, and method effects of the present invention will be further described below in conjunction with the drawings and specific embodiments.
如图1所示，本具体实施方式公开了一种L型双向悬挑结构整体提升施工方法，其适用于对如图2所示的L型双向悬挑结构进行整体提升施工，本方法包括以下步骤：As shown in Figure 1, this specific embodiment discloses an overall lifting construction method for an L-shaped two-way cantilever structure, which is suitable for the overall lifting construction of an L-shaped two-way cantilever structure as shown in Figure 2. The method includes the following step:
S1、确定L型双向悬挑结构的上吊点；具体的，上吊点的确定遵循以下原则：S1. Determine the lifting point of the L-shaped two-way cantilever structure; specifically, the determination of the lifting point shall follow the following principles:
在L型双向悬挑结构的锚固端根据提升总重、吊点反力和提升设备综合考虑确定上吊点的位置，并使得上吊点能够最大限度地包络L型双向悬挑结构锚固端；如图2，则吊点只能置于L型双向悬挑结构的右侧和上侧的两个锚固端可提供支撑处，其中标号11为结构整体提升的拟选吊点位置，通过这一原则布置上吊点，可保证L型双向悬挑结构在上升过程中得到有效的支撑。At the anchor end of the L-shaped two-way cantilever structure, determine the position of the upper lifting point according to the total lifting weight, the reaction force of the lifting point and the lifting equipment, and make the upper lifting point to maximize the envelope of the anchor end of the L-shaped two-way cantilever structure; As shown in Figure 2, the lifting point can only be placed at the two anchoring ends on the right and upper side of the L-shaped two-way cantilever structure to provide support. The
S2、在结构安装位置下方投影的地面或楼面拼装L型双向悬挑结构使之成为提升整体；S2. Assemble an L-shaped two-way cantilever structure on the ground or floor projected below the structural installation position to make it a lifting whole;
S3、通过重心分析公式对L型双向悬挑结构和上吊点进行分析，确定装配式辅助结构的位置和临时配重的重量及位置；具体的，通过以下步骤实现：S3. Analyze the L-shaped two-way cantilever structure and the upper hanging point through the center of gravity analysis formula to determine the location of the assembled auxiliary structure and the weight and location of the temporary counterweight; specifically, it can be achieved through the following steps:
(1)如图3，假定L型双向悬挑结构1水平、垂直段宽度分别为a、b，长度分别为l
1、l
2。以左下角为坐标原点，则吊点只能置于上边、右边锚固端AB、CD的可提供支撑处。将L 型双向悬挑结构1的平面划分为ABOE和CDEF两部分，则其形心分别为O
1(l
1/2，a/2)，O
2(b/2，(l
2+a)/2)，这两部分的面积分别为：
(1) As shown in Figure 3, assume that the horizontal and vertical sections of the L-shaped two-
S 1＝al 1 S 1 ＝al 1
S 2＝b(l 2-a) S 2 ＝b(l 2 -a)
而L型双向悬挑结构ABOCDF的平面面积：S＝al 1+bl 2-ab The plane area of the L-shaped bidirectional cantilever structure ABOCDF: S=al 1 +bl 2 -ab
假定L型双向悬挑结构ABOCDF的重心为O S(x s，y s)，则根据力矩平衡原理： Assuming that the center of gravity of the L-shaped two-way cantilever structure ABOCDF is O S (x s , y s ), according to the principle of moment balance:
由图可知，提升上吊点只能设置在线段AB、CD范围内，则吊点最大包络范围为图形ABCD。直线BC的方程表达式为：
将L型双向悬挑结构ABOCDF的形心坐标代入上式，有：Substituting the centroid coordinates of the L-shaped two-way cantilever structure ABOCDF into the above formula, there are:
上式表明，显然L型双向悬挑结构1的重心O S位于直线BC的下方，即如处在吊点包络图形ABCD的范围之外，如不采取措施，则一旦提升结构就会发生倾翻，整体提升施工无法进行。为此，需要通过调整L型双向悬挑结构1的重心，使之处于吊点包络范围之内，并尽量靠近吊点包络图形的吊点重心，保证提升过程中的抗倾覆性能和稳定性，即可保证整体提升施工的顺利进行； The above formula shows that obviously the center of gravity O S of the L-shaped two-way cantilever structure 1 is located below the straight line BC, that is, if it is outside the range of the lifting point envelope graph ABCD, if no measures are taken, the structure will tilt once the structure is lifted. Turn over, the overall lifting construction cannot be carried out. Therefore, it is necessary to adjust the center of gravity of the L-shaped two-way cantilever structure 1 so that it is within the envelope of the lifting point and as close to the center of gravity of the lifting point as possible to ensure the anti-overturning performance and stability during the lifting process. It can ensure the smooth progress of the overall lifting construction;
直线AD的方程式为：
(2)设吊点包络图形ABCD的重心为Q(x Q，y Q)，则根据凸多边形重心计算公式： (2) Suppose the center of gravity of the hanging point envelope graph ABCD is Q(x Q , y Q ), then the calculation formula for the center of gravity of the convex polygon is:
(3)设直线O SQ与直线BC、AD的交点分别为K、P。为了取得更好地重心调整效果，装配式辅助结构2应沿直线AD布置，作为调整提升结构重心施加的集中荷载应施加在P点处。假定L型双向悬挑结构ABOCDF总重为G，为了使整体提升施工能够正常进行，调整后提升结构的重心应位于吊点的包络区域ABCD内，假定调整后提升结构重心刚好位于吊点包络区域边界上的K点，此时施加的配重荷载为G 0，则为了满足提升过程中的稳定性和安全性，施加的配重荷载G P应满足： (3) is provided with a linear straight line O S Q BC, AD are the intersection K, P. In order to achieve a better center of gravity adjustment effect, the fabricated auxiliary structure 2 should be arranged along the straight line AD, and the concentrated load applied to adjust the center of gravity of the lifting structure should be applied at point P. Assuming that the total weight of the L-shaped two-way cantilever structure ABOCDF is G, in order to make the overall lifting construction work normally, the center of gravity of the adjusted lifting structure should be located within the envelope area ABCD of the lifting point, and it is assumed that the center of gravity of the adjusted lifting structure is just at the lifting point package At point K on the boundary of the network area, the applied counterweight load is G 0 at this time. In order to satisfy the stability and safety during the lifting process, the applied counterweight load G P should satisfy:
根据O S、Q点的坐标，可以求得直线O SQ的方程： The coordinates O S, Q points, a straight line can be obtained O S Q equations:
根据前述直线AD、BC的方程式，可以求得设直线O SQ与直线BC、AD的交点K、P的坐标： According to the aforementioned equations of the straight lines AD and BC, the coordinates of the intersection points K and P between the straight line O S Q and the straight lines BC and AD can be obtained:
其中，among them,
优先的，为了更好地保证提升过程中的稳定性和安全性，应使调整后的结构重心O S ，尽量靠近吊点包络图形ABCD的重心Q，当O S ，与Q重合时，提升过程中的稳定性最好，此时需要施加的配重： Preferred, in order to better ensure the stability and safety of the lifting process, the structure should be adjusted after the focus O S, the center of gravity as close to the hanging points of the envelope pattern ABCD Q, when O S, and Q coincides lifting The stability during the process is the best, the weight that needs to be applied at this time:
S4、在L型双向悬挑结构上设置装配式辅助结构，并在装配式辅助结构上设置临时配重；提升L型双向悬挑结构就位并连接固定，完成结构安装，并将装配式辅助结构和临时配重拆除。S4. Set up an assembled auxiliary structure on the L-shaped two-way cantilever structure, and set a temporary counterweight on the assembled auxiliary structure; lift the L-shaped two-way cantilever structure into position and connect and fix it, complete the structural installation, and add the assembled auxiliary structure The structure and temporary counterweights were removed.
具体的，如图4所示，将配重3以液压提升器4悬吊临时固定在装配式辅助结构2上，提升所述L型双向悬挑结构1就位并连接固定，通过液压提升器4方便地拆除配重3，并进一步拆除装配式辅助结构2，完成结构的整个安装过程。优选的，装配式辅助结构2是一种可快速安装拆卸的临时性桁架结构，其杆件可采用工字钢，各拼装单元之间采用螺栓连接，通过这样设置，采用工字钢为杆件的装配式桁架结构具有足够的稳固性，且方便在施工后直接拆除，提高施工效率。优选的，临时配重3也可以选用塔吊配重块或混凝土浇筑块体，或采用卷扬机提供的牵引力，以便于拆卸，提高施工效率，相应的，上述将临时配重拆除的步骤中，也可以将塔吊配重块或混凝土浇筑块体降至地面拆除，或对卷扬机牵引力进行卸载。Specifically, as shown in FIG. 4, the
本实施例公开的一种L型双向悬挑结构整体提升施工方法，先对L型双向悬挑结构在地面进行预先拼装，并根据上吊点和L型双向悬挑结构的重心，使用装配式辅助结构和临时配重对L型双向悬挑结构的重心进行调整，以使得L型双向悬挑结构在提升过程中的具有良好的抗倾覆性能和稳定性，这种施工方法将危险源多、施工环境条件恶劣的大量高空作业转化为地面作业，不但优化了施工环境条件，而且工期短，施工质量高，施工过程安全可靠，从而从总体上节约了施工成本。The present embodiment discloses an integral lifting construction method for the L-shaped two-way cantilever structure. First, the L-shaped two-way cantilever structure is pre-assembled on the ground, and according to the lifting point and the center of gravity of the L-shaped two-way cantilever structure, an assembled auxiliary is used The structure and temporary counterweights adjust the center of gravity of the L-shaped two-way cantilever structure, so that the L-shaped two-way cantilever structure has good anti-overturning performance and stability during the lifting process. This construction method will cause more danger sources and construction A large number of high-altitude operations with harsh environmental conditions are transformed into ground operations, which not only optimizes the construction environmental conditions, but also has a short construction period, high construction quality, and a safe and reliable construction process, thereby saving construction costs as a whole.
以上详细描述了本发明的较佳具体实施例，应当理解，本领域的普通方法人员无需创造性劳动就可以根据本发明的构思作出诸多修改和变化。因此，凡本方法领域中方法人员依本发明构思在现有方法基础上通过逻辑分析、推理或者根据有限的实验可以得到的方法方案，均应该在由本发明所确定的保护范围之中。The preferred embodiments of the present invention are described in detail above. It should be understood that those of ordinary methods in the art can make many modifications and changes according to the concept of the present invention without creative work. Therefore, any method scheme that can be obtained by method personnel in the field of methods based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of existing methods should fall within the protection scope determined by the present invention.
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| PCT/CN2019/094564 WO2021000290A1 (en) | 2019-07-03 | 2019-07-03 | Construction method for integral lifting of l-shaped bidirectional cantilever structure |
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