Method for installing super-large broken line glass curtain wall

Abstract

The invention discloses a super-large broken line glass curtain wall installation method which comprises the following steps: based on curtain wall design parameters, obtaining deformation trends of a curtain wall in different installation stages, and based on the deformation trends, respectively determining deformation control thresholds of a straight line section component and a broken line node component of the curtain wall; adjustable hydraulic supporting tools are arranged in the installation area of the linear segment component and the installation area of the broken line node component respectively, and the adjustable hydraulic supporting tools are used for supporting glass plates of the linear segment component and the broken line node component; and staged installation is carried out according to the time sequence that the linear segment components are installed firstly and then the broken line node components are installed. Deformation trends of different installation stages are obtained in advance based on curtain wall design parameters, differentiated deformation control threshold values are set for the straight line section component and the broken line node component, and refined control over the rigidity sudden change area at the broken line node is achieved; the adjustable hydraulic supporting tool is arranged, and the supporting force is dynamically adjusted through the hydraulic rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building curtain wall installation, and particularly relates to a method for installing an ultra-large fold line glass curtain wall. BACKGROUND

[0002] With the development of building shapes in the direction of diversification, the ultra-large fold line glass curtain wall is widely used in large public buildings such as exhibition centers and airport terminals due to its unique aesthetic effect and spatial permeability. However, such curtain walls face some challenges during installation. First, the connection stiffness of the glass and the batten at the fold line node changes abruptly, which leads to stress concentration and easy over-standard cumulative deformation (such as temperature deformation and assembly deformation), and further causes glass cracking or sealing failure. Second, the traditional installation method relies on post-inspection, which cannot realize real-time deformation monitoring and is easy to cause irreversible damage. Third, the existing fixed support tooling is difficult to adapt to the complex stress state of the fold line area, and has poor working condition adaptability. Therefore, a deformation control method that takes into account precision, dynamics and long-term effectiveness is urgently needed. SUMMARY

[0003] The main purpose of the present application is to provide a method for installing an ultra-large fold line glass curtain wall to solve the above technical problems.

[0004] To achieve the above object, the present application provides a method for installing an ultra-large fold line glass curtain wall, comprising the following steps: based on curtain wall design parameters, obtaining the deformation trend of the curtain wall at different installation stages, and based on the deformation trend, respectively determining the deformation control threshold of the straight line segment component and the fold line node component of the curtain wall; respectively configuring adjustable hydraulic support tooling in the installation area of the straight line segment component and the installation area of the fold line node component, the adjustable hydraulic support tooling being used to support the glass plate of the straight line segment component and the fold line node component; installing in stages according to the time sequence of first installing the straight line segment component and then installing the fold line node component, supporting the corresponding glass plate by the adjustable hydraulic support tooling during the installation process, and collecting displacement data of the glass plate and the displacement data of the fold line node component and the stress data of the channel at the fold line node component according to a preset strategy; when the displacement data of the glass plate exceeds the deformation control threshold, adjusting the supporting force of the corresponding glass plate by the hydraulic rod of the adjustable hydraulic support tooling until the displacement data returns to within the deformation control threshold; when the stress data exceeds a preset stress value, increasing the compression amount of the elastic seal in the elastic-rigid composite connection structure at the fold line node component until the stress data returns to within the preset stress value; after completing the installation of the straight line segment component and the fold line node component of the curtain wall, keeping the supporting state of the adjustable hydraulic support tooling and standing for a preset time, during which the displacement data and the stress data are continuously monitored, and when the displacement fluctuation, stress fluctuation and overall deformation of the curtain wall all meet the preset acceptance criteria within the preset time, it is determined that the acceptance is qualified.

[0005] The beneficial technical effect of the present application is that the present application pre-acquires the deformation trend at different installation stages based on the curtain wall design parameters, sets different deformation control thresholds for the straight segment components and the broken line joint components respectively, realizes the fine control of the stiffness mutation area at the broken line joint, overcomes the defect that the traditional fixed support tooling is difficult to adapt to the complex stress state of the broken line area by configuring adjustable hydraulic support tooling and dynamically adjusting the support force by the hydraulic rod, changes the mode of relying on post-inspection in the traditional installation method by collecting the displacement data of the glass plate and the keel connection and the stress data of the keel at the broken line joint component according to the preset strategy and executing the adjustment operation immediately when the data is out of limit, realizes the real-time deformation monitoring and dynamic control in the whole installation process, effectively relieves the stress concentration problem at the broken line joint caused by the stiffness mutation by increasing the compression amount of the elastic sealing element in the elastic-rigid composite connection structure when the stress is out of limit, avoids the superposition of cumulative deformation by the phased timing of installing the straight segment components first and then installing the broken line joint components, and ensures the stability and controllability of the final state of the curtain wall by keeping the support state static and continuously monitoring after installation. In summary, the present application realizes the accurate, dynamic and long-term control of the installation deformation of the super-large broken line glass curtain wall, effectively avoids the problems of glass cracking, sealing failure and irreversible damage, etc. BRIEF DESCRIPTION OF DRAWINGS

[0006] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0007] Figure 1 The method flowchart provided for the embodiments of the present application is shown in the following. Figure 2 The schematic diagram of the adjustable hydraulic support tooling in the method provided for the embodiments of the present application is shown in the following. Figure 3 The schematic diagram of the broken line joint component in the method provided for the embodiments of the present application is shown in the following. Figure 4 The schematic diagram of the part of the keel structure in the method provided for the embodiments of the present application is shown in the following. Figure 5 The schematic diagram of another part of the keel structure in the method provided for the embodiments of the present application is shown in the following.

[0008] Explanation of reference signs: In the figure: 10-base, 20-hydraulic rod, 30-glass supporting plate, 40-fastening assembly, 50-glass plate, 60-displacement sensor, 61-stress sensor, 70-keel, 80-rigid connecting piece, 90-elastic sealing element, 91-fastening bolt. DETAILED DESCRIPTION

[0009] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0010] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0011] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0012] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0013] Reference should also be made to Figures 1-5 The present application provides a method for installing an ultra-large fold line glass curtain wall, which is suitable for installing a component type curtain wall with a single glass area of ≥15㎡. Taking an ultra-large fold line glass curtain wall project of an exhibition center as an example, the total area of the curtain wall is 5000㎡, the fold line angle is 120°, the size of a single glass is 3.2m×5.8m (area 18.56㎡), the glass is super white laminated glass, and the keel is made of aluminum alloy. The method comprises the following steps S100-S500.

[0014] S100, based on the design parameters of the curtain wall, obtaining the deformation trend of the curtain wall at different installation stages, and determining the deformation control threshold of the straight line segment component and the fold line node component of the curtain wall based on the deformation trend, respectively.

[0015] Firstly, the design parameters of the curtain wall are obtained. These design parameters include but are not limited to the overall modeling data of the curtain wall, the size and material parameters of the glass plate 50, the cross-sectional characteristics of the keel 70, and the construction form of the connecting node, etc.

[0016] Based on the above design parameters, computer simulation technology or numerical simulation analysis means is used to obtain the deformation trend of the curtain wall in different installation stages (e.g. keel 70 installation stage, glass hanging stage, etc.) and different working conditions (such as temperature change, wind load action and self-weight installation load coupling).

[0017] Based on the simulated deformation trend, quantitative control standards are set for different parts of the curtain wall. Specifically, the deformation control threshold of the straight line segment member (i.e. the member of the straight area of the curtain wall) and the deformation control threshold of the broken line node member (i.e. the member of the broken line corner area of the curtain wall) are determined.

[0018] As an optional embodiment, the deformation control threshold of the straight line segment member can be set to, for example, ≤2.5mm / m; the deformation control threshold of the broken line node member can be set to, for example, ≤1.8mm. The threshold is given in the form of displacement limit value that can be used for on-site judgment; at the same time, the preset stress value for triggering stress adjustment is determined based on the stress deformation trend of the keel 70 at the broken line node member. The above threshold and preset stress value are used as the construction process control reference and form a record in this embodiment.

[0019] S200, respectively in the installation area of the straight line segment member and the installation area of the broken line node member, adjustable hydraulic support tooling is configured, which is used to support the glass plate 50 of the straight line segment member and the broken line node member.

[0020] According to the geometric shape of the curtain wall, the curtain wall is divided into several installation areas. Among them, the area where the glass panel is in the same plane and has no angle change is divided into the installation area of the straight line segment member; the area containing the broken line corner and the adjacent glass plate 50 on both sides is divided into the installation area of the broken line node member.

[0021] In each of the above installation areas, adjustable hydraulic support tooling is configured. This tooling is a temporary support equipment that can provide active support force and has adjustment function. The adjustable hydraulic support tooling is arranged on the construction work station, which is used to provide auxiliary support for the glass plate 50 of the straight line segment member and the broken line node member during installation, so as to share the gravity and control the initial position, so that the glass plate 50 can obtain stable support during hoisting, temporary positioning and connection and fixation stage, and reduce the accumulation of local deformation caused by self-weight, assembly deviation and stage load.

[0022] S300, according to the time sequence of first installing the straight line segment member and then installing the broken line node member, the installation is carried out in stages, and in the installation process, the corresponding glass plate 50 is supported by using the adjustable hydraulic support tooling, and the displacement data of the glass plate 50 and the keel 70 connection point and the stress data of the keel 70 at the broken line node member are collected according to the preset strategy.

[0023] The installation sequence adopts a time sequence of installing the straight segment member first and then installing the fold line joint member. The purpose of this installation time sequence is that the stress of the straight segment member is relatively simple, the installation is completed first and the deformation tends to be stable, and then the fold line joint member with more serious stress concentration is installed, which can effectively reduce the superposition of cumulative deformation and reduce the stress risk of the fold line joint member.

[0024] When the straight segment member is installed, the glass plate 50 is hoisted into position, the adjustable hydraulic support tool is used to support the glass plate 50 from below, the glass plate 50 is kept in the designed position, and then the connection and fixation of the glass plate 50 and the keel 70 are completed.

[0025] After the installation of the straight segment member is completed and the deformation data is stable, the installation of the fold line joint member is started. When the fold line joint member is installed, the corresponding glass plate 50 is also supported by the adjustable hydraulic support tool.

[0026] During the entire installation process, data is collected according to the preset strategy. Among them, the displacement data collected not only includes the displacement data of the glass plate 50 (such as the corner point and the edge), but also includes the displacement data of the keel 70 connection point, so as to comprehensively grasp the deformation of the curtain wall during the installation process. The stress data focuses on collecting the stress data of the keel 70 at the fold line joint member, which reflects the stress state of the keel 70 at the fold line joint member.

[0027] The collection strategy can be determined according to the actual engineering situation, for example, data collection can be performed once after installing several glass plates 50, or continuous real-time collection can be performed during the installation process. In this embodiment, data collection is performed once after installing 3-5 glass plates 50.

[0028] S400, when the displacement data of the glass plate 50 exceeds the deformation control threshold, the support force of the corresponding glass plate 50 is adjusted by the hydraulic rod 20 of the adjustable hydraulic support tool until the displacement data returns to within the deformation control threshold; when the stress data exceeds the preset stress value, the compression amount of the elastic seal 90 in the elastic-rigid composite connection structure at the fold line joint member is increased until the stress data returns to within the preset stress value.

[0029] The real-time collected displacement data (including the displacement of the glass plate 50 and the keel 70 connection point) and the stress data are compared with the deformation control threshold and the preset stress value determined in step S100, respectively.

[0030] When the displacement data exceeds the deformation control threshold, the support force of the corresponding glass plate 50 is adjusted by the hydraulic rod 20 of the adjustable hydraulic support tool. Specifically, if the monitoring data shows that the glass plate 50 or the keel 70 connection point is displaced downward beyond the limit, the support force of the hydraulic rod 20 is increased to lift the glass plate 50 upward; if the stress is unevenly distributed to cause tilting, the support force of the hydraulic rod 20 at the corresponding position is adjusted to restore the glass plate 50 to be horizontal. The displacement data is continuously monitored during the adjustment until the displacement data returns to within the deformation control threshold.

[0031] When the stress data exceeds the preset stress value, the compression amount of the elastic seal 90 in the elastic-rigid composite connection structure at the folded line node member is increased. An elastic-rigid composite connection structure is provided at the folded line node member, which includes an elastic seal 90 that has the function of absorbing deformation and relieving stress concentration. By increasing the compression amount of the elastic seal 90, its deformation absorption capacity can be improved, thereby reducing the stress of the keel 70 at the folded line node member. The stress data is continuously monitored during the adjustment until the stress data returns to within the preset stress value.

[0032] In the actual construction of the present embodiment, it is monitored that the stress of the keel 70 at a folded line node member reaches 220 MPa, which is close to but does not exceed the preset stress value of 247.5 MPa, and is within the safe range. At another position, it is monitored that the displacement of the glass plate 50 reaches 2.0 mm, which exceeds the deformation control threshold of the folded line node member by about 11%, at which time the support force is adjusted by the hydraulic rod 20 to adjust the displacement of the glass plate 50 at this position to fall to 1.7 mm, which returns to within the deformation control threshold.

[0033] S500, after completing the installation of the straight line segment members and the folded line node members of the curtain wall, the support state of the adjustable hydraulic support tool is maintained and rested for a preset time, during which the displacement data and the stress data are continuously monitored, and when the displacement fluctuation, the stress fluctuation, and the overall deformation of the curtain wall all meet the preset acceptance criteria, it is determined to be accepted.

[0034] After completing the installation of the straight line segment members and the folded line node members of the curtain wall, the support state of the adjustable hydraulic support tool is maintained, and the entire curtain wall is rested for a preset time.

[0035] During the resting period, the displacement data of the glass plate 50 and the keel 70 connection point and the stress data of the keel 70 at the folded line node member are continuously monitored, and the displacement fluctuation and the stress fluctuation are recorded.

[0036] After the preset time ends, statistical analysis is performed on the monitoring data. When the following conditions are met, it is determined that the acceptance is qualified: the displacement fluctuation amount within the preset time meets the preset acceptance standard; the stress fluctuation amount within the preset time meets the preset acceptance standard; and the overall deformation amount of the curtain wall meets the preset acceptance standard.

[0037] The overall deformation amount of the curtain wall refers to the maximum deviation value of the curtain wall system relative to the design theoretical position after the curtain wall is completed and installed and is stably placed. In the embodiment, the preset acceptance standard of the overall deformation amount is ≤80% of the design allowable deformation amount.

[0038] In the embodiment, the preset time is 24 hours, and the preset acceptance standard is: the displacement fluctuation amount ≤0.3 mm, the stress fluctuation amount ≤5 MPa, and the overall deformation amount ≤80% of the design value.

[0039] The actual acceptance result is: after being placed for 24 hours, the maximum displacement is 1.9 mm, the displacement fluctuation amount is 0.2 mm, and the stress fluctuation amount is 4 MPa, all of which meet the preset acceptance standard, and it is determined that the acceptance is qualified.

[0040] The super-large fold line glass curtain wall installation method provided by the embodiment is aimed at the problems of stress concentration and excessive cumulative deformation caused by the sudden change in the connection stiffness of the glass and the profiled bar 70 at the fold line node. In step S100, the method performs simulation calculation based on the coupling of the temperature load, the wind load and the installation load by using the BIM model and the finite element analysis, preacquires the deformation trend of the curtain wall at different installation stages, sets different deformation control thresholds for the straight line segment components and the fold line node components respectively, and sets an elastic-rigid composite connection structure at the fold line node component. In this way, the stress concentration caused by the sudden change in the stiffness is effectively relieved. When the stress data exceeds the limit, the dynamic adjustment can be performed by increasing the compression amount of the elastic sealing element 90. Secondly, the method establishes a complete real-time monitoring system in steps S300 and S400, which is aimed at the problem that the traditional installation method relies on post-inspection and cannot realize real-time deformation monitoring. In this way, the displacement sensors 60 are arranged at the corner points of the glass plate 50 and the profiled bar 70, the stress sensors 61 are pasted at the profiled bar 70 of the fold line node component, and the sensors are wirelessly connected to the central control system. In this way, the real-time collection of the displacement data and the stress data, the real-time generation of the deformation cloud chart and the stress trend chart and the automatic alarm when the limit is exceeded are realized. In this way, the traditional post-inspection mode is fundamentally changed, and the dynamic monitoring of the whole installation process is realized. Thirdly, the method is aimed at the problem that the existing fixed support tooling is difficult to adapt to the complex stress state of the fold line area and has poor working condition adaptability. In this way, the adjustable hydraulic support tooling is configured, and the support force is adjusted by using the hydraulic rod 20. When the displacement data exceeds the limit, the support force can be increased or decreased in steps. In this way, the tooling can be adaptively adjusted according to the actual stress change of the fold line area, and the working condition adaptability is significantly improved. In summary, the method realizes the accurate, dynamic and long-term control of the deformation of the super-large fold line glass curtain wall installation by using the whole-process control strategy of the early accurate prediction, the real-time monitoring in the process, the dynamic adjustment and intervention and the continuous monitoring after the acceptance.

[0041] In an embodiment, the deformation trend of the curtain wall at different installation stages is acquired based on the curtain wall design parameters, including: A BIM model of the curtain wall is established, the geometric parameters of the BIM model are imported into a finite element analysis software, simulation calculation is performed by coupling temperature load, wind load and installation load, and the deformation trend is acquired. The geometric parameters include glass thickness, profiled bar 70 cross-sectional size and fold line node component coordinates.

[0042] Specifically, first, a three-dimensional information model, i.e., a BIM model, of the curtain wall is established by using a BIM modeling software (for example, Revit). During the modeling process, the geometric parameters of the curtain wall are accurately input according to the curtain wall design drawings, including but not limited to: glass thickness, profiled bar 70 cross-sectional size, and fold line node component coordinates (used for accurately positioning the spatial position of the fold line corner).

[0043] Then, the geometric parameters of the BIM model are exported into a universal data exchange format (e.g., IGES format), and the format file is imported into a finite element analysis software (e.g., ANSYS or ABAQUS).

[0044] In the finite element analysis software, the corresponding material properties are defined according to the materials used in the curtain wall. In this embodiment, the glass material is defined as super-white laminated glass, with an elastic modulus set to 70-72 GPa and a Poisson's ratio set to 0.22-0.24; the mullion 70 material is defined as 6061-T6 aluminum alloy, with an elastic modulus set to 68-70 GPa and a yield strength set to 275 MPa.

[0045] Next, multiple working conditions are loaded in the finite element model for coupled simulation calculation. The working conditions include: Temperature load: considering the temperature changes that may occur during construction and use, the temperature change range is set to ±25°C in this embodiment; wind load: determined according to the meteorological data of the region where the building is located and the building height, the instantaneous wind load is set to 1.5 kPa in this embodiment; installation load: considering the concentrated load generated by the operation of construction personnel and equipment, the installation concentrated load is set to 0.8 kN in this embodiment.

[0046] Through the finite element analysis software, the above-mentioned coupled load working conditions are simulated and calculated to obtain the deformation trend of the curtain wall at different installation stages. The deformation trend presents the expected deformation amount and deformation direction of each part of the curtain wall (including the straight segment component area and the folded line node component area) under the combined action of different loads in numerical form.

[0047] Based on the simulation calculation results, the deformation control thresholds of the straight segment components and the folded line node components are determined. In this embodiment, according to the calculation results, the deformation control threshold of the straight segment component is ≤2.5 mm / m, and the deformation control threshold of the folded line node component is ≤1.8 mm.

[0048] Compared with the traditional empirical estimation method, the method of coupling BIM model and finite element analysis software to obtain the deformation trend has the following advantages: it can accurately simulate the coupling action of multiple loads, avoiding the problem of "disconnection between prediction and reality" in traditional methods; it can output differentiated deformation control thresholds for different parts of the curtain wall, providing a reliable data basis for subsequent fine control in the construction process.

[0049] In an embodiment, the adjustable hydraulic support tooling includes a base 10, a hydraulic rod 20, a glass supporting plate 30, and a fastening assembly 40. The base 10 is fixedly connected with the main structure of the building, the hydraulic rod 20 is arranged on the base 10, and the glass supporting plate 30 is arranged at the top end of the hydraulic rod 20.

[0050] Specifically, the base 10 is a basic load-bearing component of the entire adjustable hydraulic support tool, which is used to stably connect the tool to the building main structure. The bottom of the base 10 is provided with a connecting hole, which is fixedly connected to the building main structure (such as a floor slab, a beam or a pre-buried steel plate) through an expansion bolt or a pre-buried part, so as to ensure that the tool does not displace or overturn during the construction process.

[0051] The hydraulic rod 20 is arranged on the base 10 and is a component for realizing the support force adjustment function. The hydraulic rod 20 is arranged vertically, and its lower end is fixedly connected to the base 10, and its upper end is used to support the glass supporting plate 30. When it is necessary to increase the support force on the glass slab 50, the hydraulic rod 20 is elongated and lifts the glass supporting plate 30 upward; when it is necessary to reduce the support force, the hydraulic rod 20 is shortened. The hydraulic rod 20 has a certain stroke range to adapt to the installation requirements and deformation adjustment requirements of the glass slab 50 at different height positions.

[0052] The glass supporting plate 30 is arranged at the top end of the hydraulic rod 20 and is a component directly contacting the glass slab 50. The glass supporting plate 30 adopts a U-shaped plate structure and is used to support the bottom edge of the glass slab 50. The glass supporting plate 30 and the top end of the hydraulic rod 20 can be fixed by means of threaded connection, pin shaft connection or flange connection. The area of the glass supporting plate 30 is determined according to the size and weight of the glass slab 50, and it is necessary to ensure that there is enough contact area to disperse the pressure and avoid damage to the glass slab 50 due to excessive local pressure.

[0053] The fastening assembly 40 is used to temporarily fix the glass slab 50 after it is adjusted to the position. The fastening assembly 40 can include standard fasteners such as bolts, nuts, washers and clamps.

[0054] In the actual construction of the present embodiment, the adjustable hydraulic support tool can be used in the following manner: first, according to the installation position of the glass slab 50, the base 10 is fixed to the corresponding position of the building main structure; then, the glass slab 50 is hoisted into position, with its bottom edge resting on the glass supporting plate 30, and the support is provided by the adjustable hydraulic support tool; then, according to the displacement data of the glass slab 50, the hydraulic rod 20 is operated to adjust the height and attitude of the glass slab 50, so that it reaches the design required position; the hydraulic rod 20 remains in the supporting state during the current installation process until the overall acceptance of the curtain wall is qualified, and then the adjustable hydraulic support tool is removed.

[0055] The adjustable hydraulic support tool with the above structure can provide stable and reliable support for the oversized glass slab 50, and the support force can be flexibly adjusted through the hydraulic rod 20 to meet the requirement of adjusting the position of the glass slab 50 during the installation process.

[0056] In an embodiment, the displacement sensors 60 and the stress sensors 61 are respectively wirelessly connected with a central control system, which is configured to generate a deformation cloud chart in real time according to the displacement data monitored by the displacement sensors 60 and generate a stress trend chart in real time according to the stress data monitored by the stress sensors 61, and send an alarm when the displacement data and the stress data exceed the limit.

[0057] Specifically, the displacement sensors 60 for collecting displacement data and the stress sensors 61 for collecting stress data are both configured with wireless communication modules during installation. Each sensor transmits the collected data to the central control system in real time through wireless communication, without the need to lay wired data transmission cables, which is convenient for the arrangement and management of the construction site.

[0058] The central control system is arranged in a monitoring room or command center at the construction site. The central control system includes a data receiving module, a data processing module, a display module, and an alarm module.

[0059] The data receiving module is configured to receive the monitoring data transmitted by each displacement sensor 60 and stress sensor 61 through wireless communication, and to analyze and store the data.

[0060] The data processing module is configured to process and analyze the received monitoring data in real time. Specifically, the data processing module generates a deformation cloud chart of the curtain wall in real time according to the installation positions of each displacement sensor 60 and the displacement data monitored thereby, through an interpolation algorithm or a finite element post-processing algorithm. The deformation cloud chart visually displays the deformation distribution of each part of the curtain wall in a graphical manner, with color depth or color step changes corresponding to different deformation sizes, which facilitates the construction personnel to quickly identify the areas with larger deformations. Meanwhile, the data processing module generates a stress trend chart in real time according to the stress data monitored by each stress sensor 61. The stress trend chart takes time as the horizontal axis and stress value as the vertical axis, dynamically displays the deformation trend of the stress of the keel 70 at the folded line node component with time, and facilitates the construction personnel to master the development law of the stress.

[0061] The display module is configured to display the deformation cloud chart, the stress trend chart, and other monitoring data on the display screen for real-time viewing by the construction management personnel.

[0062] The alarm module is used for threshold judgment on the monitoring data, and sends an alarm when the data is out of limit. Specifically, the alarm module compares the displacement data received in real time with the deformation control threshold determined in step S100, and compares the stress data with the preset stress value. When the displacement data exceeds the deformation control threshold, or the stress data exceeds the preset stress value, the alarm module immediately triggers an alarm. The alarm mode can adopt an audible and visual alarm, that is, an alarm sound and a flashing alarm light are emitted at the same time, to ensure that the personnel on the construction site can timely perceive. The alarm response time is ≤1s, that is, the time interval from the monitoring data being out of limit to the alarm being sent is not more than 1s, to ensure the timeliness of the alarm.

[0063] In the actual construction of the present embodiment, the construction management personnel in the monitoring room can view the deformation cloud chart and stress trend chart of each part of the curtain wall in real time through the display screen of the central control system. When the deformation of a certain area approaches or exceeds the preset proportion of the deformation control threshold, the area is marked with a prominent color (such as red) on the deformation cloud chart, and the alarm module sends an audible and visual alarm. After receiving the alarm signal, the on-site construction personnel immediately inspect the area and perform the corresponding adjustment operation according to the requirements of step S400.

[0064] The displacement sensor 60 and the stress sensor 61 are wirelessly connected with the central control system, which realizes real-time transmission and centralized processing of the monitoring data, and avoids the problem of difficult wiring in the wiring connection of the super-large curtain wall construction site. The central control system generates the deformation cloud chart and stress trend chart in real time, so that the construction management personnel can intuitively master the overall deformation state and stress development trend of the curtain wall, and facilitate timely discovery of abnormalities and taking measures. The audible and visual alarm function ensures that relevant personnel can be notified in the first time when the data is out of limit, to avoid irreversible damage due to untimely discovery.

[0065] In an embodiment, the phased installation according to the timing of first installing the straight segment member and then installing the broken line node member comprises: When the straight segment member is installed, it is symmetrically pushed from the middle to both ends of the curtain wall, and the straight segment member is installed in sequence. After a predetermined number of glass plate blocks 50 are installed, displacement data is collected once. After the displacement data of the straight segment member remains within the preset fluctuation range, the broken line node member is installed. When the broken line node member is installed, the keel 70 of the broken line node member is installed first, and then the glass plate block 50 of the broken line node member is installed. The glass plate block 50 of the broken line node member is installed in a segmented splicing manner, and the splicing length of each segment is ≤2m. After each segment is completed, the displacement data of the glass plate block 50 and the keel 70 and the stress data of the keel 70 are collected.

[0066] Specifically, the phased installation process of the present embodiment comprises the following links: In the installation of the straight-line segment component, a symmetric pushing installation sequence from the middle to both ends of the curtain wall is adopted. Specifically, the central position of the straight-line segment region of the curtain wall is first determined, and then the glass slabs 50 are symmetrically installed in sequence from the central position to both ends.

[0067] The symmetric pushing installation sequence from the middle to both ends is adopted for the purpose of keeping the curtain wall structure in a relatively balanced stress state during installation, avoiding the risk of partial loading caused by unilateral installation; at the same time, symmetric pushing is beneficial to the uniform distribution of accumulated deformation at both ends of the curtain wall, reducing the risk of excessive concentration of deformation on one side.

[0068] During the installation of the straight-line segment component, displacement data is collected once every time a predetermined number of glass slabs 50 are installed. In this embodiment, the predetermined number is set to 3-5, that is, after installing 3-5 glass slabs 50, the displacement data of the installed glass slabs 50 and the connecting points of the profiles 70 is collected by the displacement sensor 60 to monitor the development of deformation during installation.

[0069] After the straight-line segment component is completely installed, the displacement data of the straight-line segment component is continuously monitored. When the displacement data of the straight-line segment component remains within a predetermined fluctuation range, it indicates that the deformation of the straight-line segment component has stabilized, and at this time, the installation of the broken-line node component can be started. The predetermined fluctuation range is determined according to the actual situation of the project and the design requirements. When the displacement data of the straight-line segment component remains within the predetermined fluctuation range during continuous observation and there is no obvious continuous deformation trend, it can be determined that the deformation has stabilized.

[0070] The broken-line node component is installed after the deformation of the straight-line segment component stabilizes, for the purpose of avoiding the installation of the broken-line node component while the straight-line segment component is still in the deformation adjustment process, resulting in additional interaction force between the two, aggravating the stress concentration at the broken-line node component.

[0071] In the installation of the broken-line node component, the profiles 70 are installed first, and then the glass slabs 50 are installed. Specifically, the profiles 70 at the broken-line node component are first installed in place and fixed to form the skeleton structure at the broken-line corner, and then the glass slabs 50 are installed onto the profiles 70.

[0072] The profiles 70 are installed first and then the glass slabs 50 are installed for the purpose of ensuring the accurate positioning and stable connection of the skeleton structure as the profiles 70 serve as the main load-bearing skeleton of the broken-line node component; installing the glass slabs 50 on the basis of a stable skeleton facilitates the accurate positioning of the glass slabs 50 and facilitates the real-time monitoring of the stress of the profiles 70 during the installation of the glass slabs 50.

[0073] The glass plate 50 of the fold line joint component is installed in a segmented splicing manner. The fold line joint component region is divided into segments along the length direction, and the splicing length of each segment is ≤2m.

[0074] During installation, splicing is sequentially performed according to the divided segments. After splicing of each segment is completed, the installation work is temporarily suspended, and displacement data of the glass plate 50 and the keel 70 and stress data of the keel 70 are collected. Whether the deformation and stress of the current segment are within the control range is judged according to the collected data. If the data is normal, the splicing installation of the next segment is continued; if the data is out of limit, the corresponding adjustment operation is performed according to the requirement of step S400, and after the data returns to normal, the installation is continued.

[0075] The glass plate 50 of the fold line joint component is installed in a segmented splicing manner. The purpose is that the stress concentration at the fold line joint component is obvious, and if a too long segment is continuously installed at one time, the cumulative deformation may be quickly superimposed and exceed the control range; by segmented splicing and temporarily suspending monitoring after each segment is completed, deformation or stress abnormalities can be found and handled in time, and the problem is controlled within a local range, so as to avoid affecting the overall structure.

[0076] In the actual construction of the embodiment, a total of 120 glass plates 50 of the straight line segment component are installed, and the installation is symmetrically pushed from the middle to both ends. Displacement data is collected once every 4 glass plates. After the straight line segment component is installed, it is observed for 2 hours, and the displacement fluctuation amount is 0.05mm / h, which meets the preset fluctuation range requirement, and it is determined that the deformation has stabilized. Then, the fold line joint component is installed, the keel 70 is installed first, and then the glass plate 50 is divided into several segments (about 1.8m per segment) for splicing. After each segment is spliced, the data is collected, and there is no data out of limit during the whole process.

[0077] In an embodiment, the displacement data of the glass plate 50 and the stress data of the keel 70 at the fold line joint component are collected according to a preset strategy, which includes: one displacement sensor 60 is arranged at each of the four corner points of each glass plate 50; one displacement sensor 60 is arranged at every preset distance at the connection between the straight line segment component and the keel 70 of the fold line joint component; and a stress sensor 61 is pasted on the inner side of the keel 70 at the fold line joint component.

[0078] Specifically, the displacement sensor 60 is arranged in the following manner: for each glass plate 50 to be installed, one displacement sensor 60 is arranged at each of the four corner points (i.e. the upper left corner, the upper right corner, the lower left corner and the lower right corner). This arrangement not only can monitor the overall displacement, but also can judge whether the glass plate 50 is tilted, twisted or deformed through the data difference of the four corner points.

[0079] Meanwhile, displacement sensors 60 are also arranged at the connection of keel 70. Particularly, at the connection area of keel 70 between straight-line segment members and folded-line node members, one displacement sensor 60 is arranged every preset distance. In the embodiment, the preset distance is set to 2 m, i.e., one monitoring point is arranged every 2 m. In this way, the continuous deformation of the framework of keel 70 can be effectively monitored.

[0080] The stress sensor 61 is arranged in the following manner: an optical fiber grating stress sensor 61 is fixedly attached to the inner side surface of the keel 70 at the folded-line node member. The specific attachment position is 50-100 mm away from the center of the folded-line node. The inner side of the keel 70 is selected for attachment because it is a key area of stress concentration.

[0081] The sampling frequency of each displacement sensor 60 and stress sensor 61 is set to ≥1 Hz, i.e., at least one data is collected every second, so as to ensure that the instantaneous deformation and stress change during installation can be captured. The measurement accuracy of the displacement sensor 60 is set to ≤0.01 mm, so as to meet the requirement of high-precision installation control.

[0082] In an embodiment, the adjusting of the support force of the corresponding glass sheet 50 by the hydraulic rod 20 of the adjustable hydraulic support tooling includes: When the displacement data of the glass sheet 50 exceeds 10%-15% of the deformation control threshold, the support force is increased or decreased by a gradient of 5%, and the single adjustment amplitude is ≤5 kN; When the displacement data exceeds 15% of the deformation control threshold, the installation is paused and the deformation trend is recalibrated, and after the deformation control threshold is corrected, the support force is continued to be adjusted.

[0083] Specifically, the adjustment of the support force according to the displacement data exceeding the limit is divided into two cases according to the severity of the displacement data exceeding the limit in the embodiment: Case one: the displacement data exceeds 10%-15% of the deformation control threshold When it is monitored that the displacement data of the glass sheet 50 exceeds the deformation control threshold, and the exceeding limit amplitude is within the range of 10%-15%, the support force is adjusted in a gradient adjustment manner.

[0084] Gradient adjustment refers to adjusting the support force gradually according to a fixed proportion, rather than a one-time large adjustment. In the embodiment, the gradient is set to 5%, i.e., the change amount of the support force in each adjustment is 5% of the current support force. Meanwhile, to prevent the impact on the glass sheet 50 or the tooling caused by a large single adjustment amplitude, the single adjustment amplitude is regulated to be ≤5 kN.

[0085] In the adjustment direction, the increment or decrement of the support force is determined according to the direction of the displacement deviation. If the glass slab 50 is displaced downward beyond the limit, indicating that the support force is insufficient, the support force is increased; if the glass slab 50 is arched upward due to excessive local stress, the support force at the corresponding position is decreased.

[0086] After each gradient adjustment is completed, the change in displacement data is continuously monitored. If the displacement data returns to within the deformation control threshold, the adjustment is stopped and the current support force is maintained; if the displacement data is still beyond the limit but has an improvement trend, the next adjustment is continued at a gradient of 5%; if the displacement data has not improved significantly after multiple adjustments, the processing mode of case two is entered.

[0087] Case two: displacement data exceeds more than 15% of the deformation control threshold When it is monitored that the displacement data of the glass slab 50 exceeds more than 15% of the deformation control threshold, it indicates that the current deformation has deviated significantly from the expectation, which may be due to the following reasons: there is a large difference between the actual construction conditions and the assumptions in the early modeling; the load conditions on site have changed unpredictably; or the deformation control threshold determined in the early stage itself has a deviation.

[0088] At this time, continuing to adjust according to the original strategy may not be able to effectively control the deformation, and even may exacerbate the problem due to blind adjustment. Therefore, the present embodiment provides that the installation work should be suspended under this condition.

[0089] After suspending the installation, technical personnel are organized to recalibrate the early deformation prediction modeling. The calibration work includes: checking whether the load conditions of the actual construction site are consistent with the modeling assumptions; checking the deviation of the actual position of the installed component from the design position; re-measuring environmental temperature and other influencing factors; if necessary, modifying the boundary conditions and load parameters of the finite element model and re-performing simulation calculation.

[0090] According to the calibration results, the deformation control threshold is corrected. The corrected threshold should be more consistent with the actual situation on site, and can provide accurate judgment basis for subsequent adjustment operations.

[0091] After completing the threshold correction, the current displacement overrun is re-evaluated according to the new deformation control threshold, and the support force is adjusted according to the gradient adjustment mode of case one until the displacement data returns to within the corrected deformation control threshold.

[0092] In an embodiment, the elastic-rigid composite connection structure includes a rigid connector 80 and an elastic sealing member 90; the rigid connector 80 is a stainless steel corner code for transmitting vertical load; the elastic sealing member 90 is a ternary ethylene-propylene rubber strip for absorbing lateral deformation; the rigid connector 80 and the elastic sealing member 90 are alternately arranged along the node circumference of the fold line node component.

[0093] Specifically, the elastic-rigid composite connecting structure is a composite connecting structure arranged at the fold-line joint member for connecting the glass panel 50 and the keel 70. The structure is composed of two types of components with different functions, i.e., the rigid connecting piece 80 and the elastic sealing piece 90, which cooperate with each other to realize load transmission and deformation coordination at the fold-line joint member.

[0094] The rigid connecting piece 80 adopts a stainless steel corner brace. The stainless steel corner brace is an L-shaped connecting piece made of stainless steel plate by bending or welding, which has high strength and rigidity.

[0095] The main function of the rigid connecting piece 80 is to transmit the vertical load. In the curtain wall structure, the self-weight of the glass panel 50 and the vertical component of the wind load acting on the glass surface need to be transmitted to the keel 70 through the connecting structure, and then transmitted to the main structure of the building by the keel 70. The rigid connecting piece 80 undertakes the main task of vertical load transmission.

[0096] The elastic sealing piece 90 adopts an ethylene-propylene-diene rubber strip. The main function of the elastic sealing piece 90 is to absorb the lateral deformation. Due to the angle transition at the fold-line joint member, relative lateral displacement will occur between the glass panel 50 and the keel 70 during temperature change, wind load action and installation process. If a purely rigid connection is adopted, the lateral displacement will generate a large constraint stress at the joint, resulting in stress concentration. The elastic sealing piece 90 can absorb and buffer the relative lateral displacement between the glass panel 50 and the keel 70 through its elastic deformation, thereby relieving stress concentration and protecting the glass panel 50 and the connecting structure from damage.

[0097] In the present embodiment, the ethylene-propylene-diene rubber strip is arranged between the rigid connecting piece 80 and the glass panel 50. When the relative lateral displacement occurs between the glass panel 50 and the keel 70, the rubber strip absorbs the displacement through compression or shear deformation.

[0098] The rigid connecting piece 80 and the elastic sealing piece 90 are alternately arranged along the node circumference of the fold-line joint member. The node circumference refers to the peripheral length of the connection region between the edge of the glass panel 50 and the keel 70 at the fold-line joint member.

[0099] Alternately arranging means that the rigid connecting piece 80 and the elastic sealing piece 90 are sequentially and spacedly arranged along the direction of the node circumference, forming the arrangement sequence of "rigid connecting piece 80-elastic sealing piece 90-rigid connecting piece 80-elastic sealing piece 90...".

[0100] The purpose of the alternate arrangement is to make the fold line node component have both sufficient rigidity to transfer vertical load and certain flexibility to absorb lateral deformation. If all rigid connectors 80 are used, the rigidity at the node is too large and cannot adapt to deformation, which is prone to stress concentration. If all elastic seals 90 are used, the rigidity at the node is insufficient and cannot effectively transfer the load, and may produce excessive deformation. The alternate arrangement realizes a reasonable ratio of rigidity and flexibility, so that the node meets the requirements of load bearing and deformation coordination.

[0101] In the actual construction of the present embodiment, the elastic-rigid composite connection structure at the fold line node component is set according to the above method. The stainless steel corner brackets are uniformly arranged along the circumference of the node, and an EPDM rubber strip is arranged between adjacent two corner brackets. When the stress data of the keel 70 at the fold line node component monitored in step S400 exceeds the preset stress value, the deformation absorption capacity of the elastic seal 90 is improved by increasing the compression amount, thereby reducing the stress.

[0102] In an embodiment, the method further comprises: The tightening bolt 91 at the fold line node component is tightened, driving the rigid connector 80 to move and compress the elastic seal 90 between the rigid connector 80 and the glass plate 50.

[0103] Specifically, at the fold line node component, the rigid connector 80 is connected to the keel 70 through the tightening bolt 91. The tightening bolt 91 passes through the mounting hole on the rigid connector 80 and is screwed into the threaded hole on the keel 70 or cooperates with the nut on the back of the keel 70. The elastic seal 90 is arranged between the rigid connector 80 and the glass plate 50.

[0104] When the stress data of the keel 70 at the fold line node component is monitored to exceed the preset stress value, it indicates that the restraint stress at this position is too large, and the node rigidity needs to be reduced by increasing the compression amount of the elastic seal 90 to relieve stress concentration.

[0105] At this time, the construction personnel use a torque wrench to tighten the tightening bolt 91 at the fold line node component. With the tightening of the bolt, the rigid connector 80 moves towards the keel 70 under the action of the bolt tension. Since the elastic seal 90 is located between the rigid connector 80 and the glass plate 50, the movement of the rigid connector 80 will extrude the elastic seal 90, increasing its compression amount.

[0106] The increase of the compression amount of the elastic seal 90 means the decrease of its thickness, the increase of its density, and the change of its elastic modulus (usually showing nonlinear hardening in the compression range, but can be regarded as a stiffness adjustment means in the fine adjustment range). More importantly, by actively applying the compression deformation, part of the installation gap can be eliminated in advance, and the contact state at the node can be changed, so that the node can exhibit better flexibility characteristics during subsequent stress deformation, thereby reducing the stress on the keel 70.

[0107] During the adjustment process, the construction personnel should gradually tighten the bolts according to the feedback of the stress monitoring data. Generally, the tightening range should be small each time (for example, half a turn or one turn), and the change of the stress data should be observed. When the stress data returns to within the preset stress value, the tightening operation is stopped.

[0108] It should be noted that the adjustment range should be controlled within the compression range allowed by the elastic seal 90 (for example, 0.5-2mm), to avoid excessive compression leading to loss of elasticity or damage of the seal.

[0109] In an embodiment, after the acceptance determination, the method further comprises: collecting the displacement data and the stress data at a preset period after the curtain wall is put into use; if the displacement data or the stress data exceeds 120% of the recorded value at the time of acceptance, the steps of adjusting the support force or increasing the compression amount of the elastic seal 90 are re-executed until the corresponding data returns to the safe interval.

[0110] Specifically, the sensors interface reserved during installation is used to continuously monitor throughout the life cycle of the curtain wall after it is put into use. The preset period can be set to collect data every 3 months in the first year after use, and then collect data every 6 months.

[0111] If the monitoring data exceeds 120% of the recorded value at the time of acceptance, it indicates that the curtain wall has produced a large cumulative deformation or stress change under long-term load. At this time, the adjustable hydraulic support tooling is reactivated or the node bolts are fine-tuned, and the intervention is carried out according to the method of step S400 until the data returns to the safe interval, ensuring the safety of the curtain wall during long-term use.

[0112] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for installing a super large fold line glass curtain wall, characterized in that, The method comprises the following steps: obtaining the deformation trend of the curtain wall at different installation stages based on the curtain wall design parameters, and determining the deformation control threshold of the straight segment component and the folded line node component of the curtain wall respectively based on the deformation trend; configuring adjustable hydraulic support tools in the installation area of the straight segment component and the installation area of the folded line node component respectively, the adjustable hydraulic support tools being used to support the glass plate blocks of the straight segment component and the folded line node component; installing the straight segment component first and then installing the folded line node component in stages according to the time sequence, supporting the corresponding glass plate blocks by using the adjustable hydraulic support tools during the installation process, and collecting displacement data of the glass plate blocks and the keel connection and stress data of the keel at the folded line node component according to a preset strategy; when the displacement data of the glass plate blocks exceeds the deformation control threshold, adjusting the support force of the corresponding glass plate blocks by the hydraulic rod of the adjustable hydraulic support tool until the displacement data returns to within the deformation control threshold; when the stress data exceeds a preset stress value, increasing the compression amount of the elastic seal in the elastic-rigid composite connection structure at the folded line node component until the stress data returns to within the preset stress value; after completing the installation of the straight segment component and the folded line node component of the curtain wall, keeping the support state of the adjustable hydraulic support tool and standing for a preset time, during which the displacement data and the stress data are continuously monitored, and when the displacement fluctuation, stress fluctuation and overall deformation of the curtain wall all meet the preset acceptance standard, it is determined that the acceptance is qualified.

2. The method of claim 1, wherein, The method comprises the following steps: establishing a BIM model of the curtain wall, importing the geometric parameters of the BIM model into a finite element analysis software, coupling temperature load, wind load and installation load for simulation calculation to obtain the deformation trend; wherein the geometric parameters include glass thickness, keel cross-sectional size and folded line node component coordinates.

3. The method of claim 1, wherein, The adjustable hydraulic support tool comprises a base, a hydraulic rod, a glass supporting plate and a fastening assembly; the base is fixedly connected with the main building structure, the hydraulic rod is arranged on the base, the glass supporting plate is arranged at the top end of the hydraulic rod, and the glass supporting plate is fixedly connected with the corresponding glass plate block through the fastening assembly.

4. The method of claim 1, wherein, The method comprises the following steps: when installing the straight segment component, symmetrically advancing from the middle to both ends of the curtain wall, installing the straight segment component in sequence, and collecting displacement data once every time a predetermined number of glass plate blocks are installed; after the displacement data of the glass plate blocks and the keel connection of the straight segment component remain within a preset fluctuation range, installing the folded line node component; when installing the folded line node component, first installing the keel of the folded line node component, and then installing the glass plate block of the folded line node component; The glass plate block of the broken line node component is installed in a segmented splicing manner, each segment has a splicing length of ≤2m, and after each segment is completed, the displacement data of the glass plate block and the keel and the stress data of the keel are collected.

5. The method of claim 1, wherein, The displacement data of the glass plate block and the keel connection and the stress data of the keel at the broken line node component are collected according to a preset strategy, including: One displacement sensor is arranged at each of the four corner points of each glass plate block; A displacement sensor is arranged at every preset distance along the keel connection of the curtain wall; A stress sensor is pasted on the inner side of the keel at the broken line node component.

6. The method of claim 5, wherein, The displacement sensor and the stress sensor are respectively wirelessly connected to a central control system, and the central control system is used to generate a deformation cloud map in real time according to the displacement data monitored by the displacement sensor and generate a stress trend graph in real time according to the stress data monitored by the stress sensor, and issue an alarm when the displacement data and the stress data exceed the limit.

7. The method of installing an ultra-large foldline glass curtain wall according to claim 1, wherein, The support force of the corresponding glass plate block is adjusted by the hydraulic rod of the adjustable hydraulic support tool, including: When the displacement data of the glass plate block exceeds 10%-15% of the deformation control threshold, the support force is increased or decreased by 5% gradient, and the single adjustment amplitude is ≤5kN; When the displacement data exceeds 15% of the deformation control threshold, the installation is paused and the deformation trend is recalibrated, and after the deformation control threshold is corrected, the support force is continued to be adjusted.

8. The method of installing an ultra-large foldline glass curtain wall according to claim 1, wherein, The elastic-rigid composite connection structure includes a rigid connecting piece and an elastic sealing piece; the rigid connecting piece is a stainless steel corner code for transmitting vertical load; the elastic sealing piece is an ethylene-propylene-diene rubber strip for absorbing lateral deformation; the rigid connecting piece and the elastic sealing piece are alternately arranged along the node circumference of the broken line node component.

9. The method of claim 8, wherein, The compression amount of the elastic sealing piece in the elastic-rigid composite connection structure at the broken line node component is increased by tightening the fastening bolts at the broken line node component, which drives the rigid connecting piece to move and compress the elastic sealing piece between the rigid connecting piece and the glass plate block. 10.The method of claim 1, wherein, After determining that the acceptance is qualified, the method further includes: After the curtain wall is put into use, the displacement data and the stress data are collected at a preset period; If the displacement data or the stress data exceeds 120% of the recorded value at the time of acceptance, the steps of adjusting the support force or increasing the compression amount of the elastic sealing piece are re-executed until the corresponding data returns to the safe interval.

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