Dynamic pre-deviation method for suspended splicing of bolt spherical reticulated shell across expansion joint and suspended splicing method

Abstract

The invention provides a dynamic pre-deviation method and a suspended splicing method for bolt spherical reticulated shell span expansion joint suspended splicing, and belongs to the technical field of large-span space structure construction.By taking the middle position of an initial temperature section as a starting point, high-altitude bulk packaging is carried out on the initial temperature section from the starting point to the two end sides of the initial temperature section; calculating an accumulative error value when each support is installed, and then calculating an error unit change value, thereby calculating a first accumulative error of the initial temperature section from the starting point to the end side; according to the first accumulative error and the second accumulative error, the adjacent independent temperature sections are subjected to cross-expansion-joint assembly from the temperature expansion joint between the two independent temperature sections to the middle position of the two independent temperature sections, and the pre-deviation distance of starting installation of the adjacent independent temperature sections at the expansion joint position is obtained based on the first accumulative error and the second accumulative error; therefore, temporary nodes and rod pieces crossing the expansion joint are accurately designed, it is ensured that accumulated errors can be compensated in the suspended splicing process, and the problem of support deviation after crossing the expansion joint is solved. The overall construction precision is improved; and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of large-span space structure construction, and more specifically to a dynamic pre-biasing method and a suspension splicing method for bolt-ball lattice shell span expansion joint suspension splicing. Background Art

[0002] In the design and construction of the super-long bolt ball node shell structure, in order to adapt to the structural expansion and contraction caused by temperature changes, it is necessary to set temperature expansion joints to divide the lattice shell into multiple temperature sections. Bolt ball node lattice shells are often constructed by high-altitude bulk method, which is prone to assembly cumulative errors. The main reasons for this cumulative error are multifaceted. The main reason is that the bolts are not tightened between every two bolt ball nodes. The milling surface of the bolt ball, the sleeve, and the thickness of multiple paint coatings at both ends of the rod can all lead to an increase in the overall assembly size, which in turn leads to a greater deviation of the support from the theoretical center position as it is farther away from the starting assembly point.

[0003] At present, in traditional construction, in order to cross the temperature expansion joint, temporary nodes and rods are often added for cantilever assembly. If the rods and ball nodes across the expansion joint are designed and processed according to the theoretical temperature expansion joint width value (such as 1m spacing), the cumulative error of the grid of the temperature section that has been constructed will be transferred to the grid shell of the next temperature section after the expansion joint, thereby aggravating the problem of support deviation. Moreover, when the grid shell of the next temperature section is assembled from the temperature expansion joint to the other end, the above-mentioned cumulative error problem also exists. All these cumulative errors are uncertain values, and the specific value of the pre-deviation after crossing the temperature expansion joint cannot be determined, which brings difficulties to the construction of the bolt ball grid shell across the expansion joint. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a dynamic pre-biasing method and a suspension method for a bolt-ball grid shell suspended across an expansion joint, so as to solve the problem in the prior art that in the traditional bolt-ball grid shell suspended across an expansion joint construction process, the cumulative error of the grid in the temperature section that has been constructed will be transmitted to the grid shell in the next temperature section after crossing the temperature expansion joint. Therefore, there is a continuous cumulative error, which leads to aggravated support deviation, thereby bringing difficulties to the construction of the bolt-ball grid shell suspended across the expansion joint.

[0005] The present invention provides a dynamic pre-biasing method for bolt-ball lattice shell suspension splicing across expansion joints, comprising the following steps:

[0006] Dividing the bolted ball grid shell into at least two independent temperature sections through the temperature expansion joint, and determining an initial temperature section from the at least two independent temperature sections;

[0007] Along the length direction of the initial temperature section, the middle position of the initial temperature section is taken as the starting point, and high-altitude bulk loading is performed from the starting point to the end sides on the initial temperature section, and the cumulative error value of each installed support is calculated from the starting point to the end sides until the cumulative number of supports close to the end sides of the initial temperature section is reached, so as to obtain the predicted cumulative error value of the support installed from the starting point to the end sides in the initial temperature section;

[0008] Calculate the error unit change value of the predicted cumulative error value according to the predicted cumulative error value and the length of the initial temperature section, and calculate the first cumulative error of the initial temperature section from the starting point to the end side according to the error unit change value;

[0009] When assembling the cross-temperature expansion joint from the temperature expansion joint at the end side of the initial temperature section to the adjacent independent temperature section, the middle position of the adjacent independent temperature section is used as the preset end point of the cross-temperature expansion joint assembly;

[0010] Calculate, according to the error unit change value and the length of the adjacent independent temperature section, a second cumulative error of assembling the adjacent independent temperature sections across the temperature expansion joint to the predetermined end point;

[0011] Calculating, based on the first cumulative error and the second cumulative error, a pre-biased distance for starting installation of the adjacent independent temperature section at the temperature expansion joint position on the end side of the initial temperature section;

[0012] Dynamic pre-biasing of the bolted ball grid shell across the expansion joint suspension is performed according to the pre-biasing distance.

[0013] In addition, a preferred solution is that after dividing the bolt ball grid shell into at least two independent temperature sections through the temperature expansion joint, it also includes:

[0014] The column spacing of the supports on each of the independent temperature sections, the span in the width direction of each of the independent temperature sections, and the spacing of the temperature expansion joints are set to the same value.

[0015] In addition, a preferred solution is that determining the initial temperature section from at least two independent temperature sections comprises:

[0016] When the number of the independent temperature sections is two, arbitrarily select one independent temperature section as the initial temperature section;

[0017] When the number of the independent temperature sections is greater than two, the independent temperature section located in the middle and having the temperature expansion joints disposed on both end sides thereof is selected as the initial temperature section.

[0018] In addition, a preferred solution is that, in the initial temperature section, during the high-altitude bulk loading from the starting point toward the two end sides,

[0019] High-altitude bulk loading is carried out simultaneously from the starting point toward both end sides.

[0020] In addition, a preferred solution is that the front preset number of the end side close to the initial temperature section is an integer greater than or equal to 1.

[0021] In addition, the preferred solution is that the calculation formula of the error unit change value is: d = ΔS / (L 初 / 2-nD); where

[0022] D is the error unit change value, ΔS is the predicted cumulative error value, L 初 is the length of the initial temperature section, n is the previous preset number close to the end side of the initial temperature section, wherein n is an integer greater than or equal to 0, and D is the spacing of the supports.

[0023] In addition, the preferred solution is that the calculation formula of the first cumulative error is: ΔS1 = d*(L 初 / 2); where ΔS1 is the first cumulative error, d is the error unit change value, L 初 is the length of the initial temperature section.

[0024] In addition, a preferred solution is that the calculation formula of the second cumulative error is: ΔS2 = d*(L 相邻 / 2); where ΔS2 is the second cumulative error, d is the error unit change value, L 相邻 is the length of the adjacent independent temperature zone.

[0025] In addition, the preferred solution is that the calculation formula of the pre-bias distance is: 12 =P-(ΔS1+ΔS2); where P 12 is the pre-biased distance of the adjacent independent temperature sections installed starting from the temperature expansion joint position on the end side of the initial temperature section, P is the spacing of the temperature expansion joints, ΔS1 is the first cumulative error, and ΔS2 is the second cumulative error.

[0026] The present invention provides a bolt ball lattice shell spanning expansion joint suspension assembly method, comprising the following steps:

[0027] The dynamic pre-biasing method of bolted ball lattice shell cantilever splicing across expansion joints as described above is used to determine the pre-biasing distance between two adjacent independent temperature sections;

[0028] Designing temporary nodes and rods in the temperature expansion joint between two adjacent independent temperature sections according to the pre-biased distance;

[0029] Based on the design of the temporary nodes and the rods, cantilever construction is performed from the completed independent temperature section to the unfinished independent temperature section.

[0030] It can be seen from the above technical scheme that the dynamic pre-biasing method and suspension method of the bolt ball grid shell spanning the expansion joint provided by the present invention determine the initial temperature section, take the middle position of the initial temperature section as the starting point, and perform high-altitude bulk installation from the starting point to the two end sides of the initial temperature section, calculate the cumulative error value of each installed support to obtain the predicted cumulative error value, and then calculate the error unit change value of the predicted cumulative error value, thereby calculating the first cumulative error of the initial temperature section from the starting point to the end side; and according to the error unit change value, calculate the unique error adjacent to the initial temperature section. The second cumulative error of the independent temperature section from the temperature expansion joint between the two to the middle position of the adjacent independent temperature section for cross-expansion joint assembly, and then the pre-bias distance of the adjacent independent temperature section starting installation at the temperature expansion joint position on the end side of the initial temperature section is obtained based on the first cumulative error and the second cumulative error. Based on this method, the pre-bias distance of all unfinished independent temperature sections of the bolt ball grid shell starting installation at the temperature expansion joint position is obtained, so as to accurately design and process the temporary nodes and rods across the expansion joint based on the pre-bias distance, and ensure that the cumulative error can be compensated during the hanging assembly process. The present invention can effectively solve the problem of support deviation after the cross-temperature expansion joint by predicting and compensating for the cumulative error in advance through a dynamic pre-bias strategy; by accurately calculating the pre-bias distance across the expansion joint, it is ensured that the design and processing of the cross-joint rods and nodes meet the actual needs and improve the overall construction accuracy; and avoid waiting for the cumulative error to fully appear at the expansion joint position before processing, and prepare the cross-joint components in advance, which can effectively shorten the construction period.

[0031] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0033] Figure 1 It is a flow chart of a dynamic pre-biasing method for bolt-ball lattice shell cantilever assembly across expansion joints according to an embodiment of the present invention;

[0034] Figure 2 It is a schematic plan view of a bolt ball lattice shell according to Example 1 of the present invention. DETAILED DESCRIPTION

[0035] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0036] In view of the above-mentioned prior art, in the traditional bolt-ball grid shell suspension construction process across the expansion joint, since the cumulative error of the grid of the temperature section that has been constructed will be transmitted to the grid shell of the next temperature section after crossing the temperature expansion joint, there is a continuous cumulative error, which leads to aggravated support deviation, thereby bringing difficulties to the construction of the bolt-ball grid shell suspension across the expansion joint. A dynamic pre-bias method and suspension method for the bolt-ball grid shell suspension across the expansion joint are proposed.

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] In order to illustrate the dynamic pre-biasing method and suspension method of bolt ball lattice shell across expansion joint suspension provided by the present invention, Figure 1 The flow chart of the dynamic pre-biasing method for bolt-ball lattice shell cantilever assembly across expansion joints according to an embodiment of the present invention is shown; Figure 2 The planar structure of the bolt ball lattice shell according to Example 1 of the present invention is shown.

[0039] like Figure 1 As shown, the dynamic pre-biasing method for bolt ball lattice shell suspension splicing across expansion joints provided by the present invention comprises the following steps:

[0040] Step S1, dividing the bolt ball grid shell into at least two independent temperature sections through the temperature expansion joint, and determining an initial temperature section from the at least two independent temperature sections.

[0041] Specifically, in order to adapt to the structural expansion and contraction caused by temperature changes, temperature expansion joints are usually required on the bolt ball grid shell, thereby dividing the bolt ball grid shell into at least two independent temperature sections. During the construction process, any independent temperature section can be selected as the initial temperature section, that is, the starting section for high-altitude bulk loading.

[0042] As a preferred solution of the present invention, after the bolt ball grid shell is divided into at least two independent temperature sections through the temperature expansion joint, it also includes:

[0043] The same values ​​are set for the column spacing of the supports on each independent temperature zone, the span in the width direction of each independent temperature zone, and the spacing of the temperature expansion joints.

[0044] Specifically, in order to facilitate subsequent error prediction and accurate evaluation of dynamic pre-bias, it is necessary to set the column spacing of the supports on each independent temperature zone, the span in the width direction of each independent temperature zone, and the spacing of the temperature expansion joints to the same value, that is, the column spacing, span, and spacing of the temperature expansion joints of the supports on all independent temperature zones are the same.

[0045] As a preferred embodiment of the present invention, determining the initial temperature section from at least two independent temperature sections comprises:

[0046] When the number of independent temperature sections is two, any independent temperature section is selected as the initial temperature section;

[0047] When the number of independent temperature sections is greater than two, the independent temperature section located in the middle and having temperature expansion joints at both end sides is selected as the initial temperature section.

[0048] Specifically, when the number of independent temperature sections is two, any one of the independent temperature sections is selected as the initial temperature section. When the number of independent temperature sections is greater than two, the independent temperature section located in the middle and having temperature expansion joints at both ends is preferably used as the initial temperature section. For example, when there are three independent temperature sections, the middle independent temperature section is selected as the initial temperature section. When there are four independent temperature sections, any one of the two middle independent temperature sections is selected as the initial temperature section. When there are five independent temperature sections, any one of the three middle independent temperature sections is selected as the initial temperature section. It is particularly preferred that the middle independent temperature section is used as the initial temperature section.

[0049] Step S2, along the length direction of the initial temperature section, take the middle position of the initial temperature section as the starting point, and start high-altitude bulk loading from the starting point to the two end sides on the initial temperature section, and calculate the cumulative error value of each installed support from the starting point to the end side until it accumulates to a preset number of supports close to the end side of the initial temperature section, so as to obtain the predicted cumulative error value of the support installed from the starting point to the end side of the initial temperature section.

[0050] Specifically, after selecting the initial temperature section, the middle position of the initial temperature section or the middle support spacing is taken as the starting point, and high-altitude bulk loading is carried out from the starting point toward both end sides. Each time a support is installed, the cumulative error value is calculated until it accumulates to a preset number of supports close to the end side of the initial temperature section, at which time the predicted cumulative error value is obtained.

[0051] As a preferred embodiment of the present invention, in the initial temperature section, during the process of high-altitude bulking from the starting point to the two end sides, high-altitude bulking is simultaneously performed from the starting point to the two end sides.

[0052] Specifically, in order to improve the construction efficiency, therefore, in the initial temperature section, high-altitude bulk loading from the starting point to the two end sides can be carried out simultaneously.

[0053] As a preferred solution of the present invention, the front preset number close to the end side of the initial temperature section is an integer greater than or equal to 1.

[0054] Specifically, the front preset number on the end side close to the initial temperature section can be 0, that is, assembled from the starting point to the last support on the end side. Considering that in actual operation, it may be too late to wait until the temperature expansion joint position (the last support) to process the temporary nodes and rods across the expansion joint, it is preferred that the front preset number on the end side close to the initial temperature section is an integer greater than or equal to 1, that is, the predicted cumulative error value calculation is performed when at least one support is left.

[0055] Step S3, calculating the error unit change value of the predicted cumulative error value according to the predicted cumulative error value and the length of the initial temperature section, and calculating the first cumulative error of the initial temperature section from the starting point to the end side according to the error unit change value.

[0056] Specifically, according to the predicted cumulative error value and the length of the initial temperature section, the error unit change value of the predicted cumulative error value can be calculated, and then the first cumulative error of the initial temperature section from the starting point to the end side can be calculated according to the error unit change value.

[0057] According to the predicted cumulative error value and the length of the initial temperature section, the error unit change value of the predicted cumulative error value is calculated including:

[0058] According to the predicted cumulative error value and the length of the initial temperature section, the error unit change value of the predicted cumulative error value is calculated by the calculation formula of the error unit change value; wherein,

[0059] The error unit change value calculation formula is: d = ΔS / (L 初 / 2-nD); where

[0060] D is the error unit change value, ΔS is the predicted cumulative error value, L 初 is the length of the initial temperature section, n is the previous preset number close to the end side of the initial temperature section, wherein n is an integer greater than or equal to 0, and D is the spacing of the supports.

[0061] The calculation formula of the first cumulative error is: ΔS1 = d*(L 初 / 2); among which,

[0062] ΔS1 is the first cumulative error, d is the error unit change value, L 初 is the length of the initial temperature section.

[0063] Step S4: when assembling the cross-temperature expansion joint from the temperature expansion joint at the end side of the initial temperature section to the adjacent independent temperature section, the middle position of the adjacent independent temperature section is used as the preset end point of the cross-temperature expansion joint assembly.

[0064] Specifically, when there is an adjacent independent temperature segment on the end side of the initial temperature segment, it is necessary to assemble a cross-temperature expansion joint from the temperature expansion joint between the two to the independent temperature segment, and the middle position of the adjacent independent temperature segment is selected as the preset end point of the cross-temperature expansion joint assembly.

[0065] Step S5, calculating the second cumulative error of assembling adjacent independent temperature sections across the temperature expansion joint to a predetermined end point according to the error unit change value and the length of the adjacent independent temperature section.

[0066] Specifically, according to the error unit change value obtained by the previous calculation through the initial temperature segment end, the second cumulative error of assembling adjacent independent temperature segments across the temperature expansion joint to the predetermined end point is calculated.

[0067] The calculation formula of the second cumulative error is: ΔS2 = d*(L 相邻 / 2); among which,

[0068] ΔS2 is the second cumulative error, d is the error unit change value, L 相邻 is the length of the adjacent independent temperature zones.

[0069] Step S6: Calculate the pre-biased distance for starting installation of the temperature expansion joint position of the adjacent independent temperature sections at the end side of the initial temperature section according to the first cumulative error and the second cumulative error.

[0070] Specifically, based on the first cumulative error and the second cumulative error, the pre-bias distance for the adjacent independent temperature segments to be installed at the temperature expansion joint position on the end side of the initial temperature segment can be obtained. By analogy with this method, the pre-bias distance for the other independent temperature segments to be installed at the temperature expansion joint position during the installation process on the bolt ball grid shell can be obtained. Temporary nodes and rods can be designed based on the pre-bias distance to accurately complete the cantilever construction across the expansion joint.

[0071] Among them, the calculation formula of the pre-bias distance is: P 12 =P-(ΔS1+ΔS2); where,

[0072] P 12 is the pre-biased distance for installing the temperature expansion joint of the adjacent independent temperature sections at the end side of the initial temperature section, P is the spacing of the temperature expansion joints, ΔS1 is the first cumulative error, and ΔS2 is the second cumulative error.

[0073] The bolt ball lattice shell suspension splicing method provided by the present invention is characterized by comprising the following steps:

[0074] The dynamic pre-biasing method for bolted ball lattice shell cantilever splicing across expansion joints as described above is used to determine the pre-biasing distance between two adjacent independent temperature sections;

[0075] Design temporary nodes and rods in the temperature expansion joint between two adjacent independent temperature sections according to the pre-deviation distance;

[0076] Based on the design of temporary nodes and rods, cantilever construction is carried out from the completed independent temperature section to the unfinished independent temperature section.

[0077] Step S7, performing dynamic pre-biasing of the bolted ball grid shell across the expansion joint suspension assembly according to the pre-biasing distance.

[0078] In order to better illustrate the dynamic pre-biasing method and suspension method of the bolt ball grid shell across the expansion joint provided by the present invention, the following specific embodiments are provided. It should be noted that the following specific embodiments of the present invention do not limit the present invention, but are only for better illustrating and explaining the technical solution of the present invention.

[0079] Example 1

[0080] like Figure 2 As shown, taking the example of dividing the super-long bolt ball grid shell structure into three independent temperature sections through two temperature expansion joints, the dynamic pre-biasing method and the suspension splicing method of the bolt ball grid shell across the expansion joints provided by the present invention are exemplarily explained.

[0081] The three independent temperature sections are W1, W2, and W3, with lengths of L1, L2, and L3, respectively. W2 is located in the middle of the super-long bolted spherical shell structure, with expansion joints F1 and F2 at both ends. The spacing D of the supports, the spacing P of the temperature expansion joints, and the span K in the width direction are set uniformly, and the distance is uniformly in meters (m). Figure 2 The letters in refer to the following: W1 and W3 are independent temperature sections on both sides, W2 is the independent temperature section in the middle, F1 and F2 are temperature expansion joints, K is the span of the grid shell of the three independent temperature sections W1, W2 and W3, D is the spacing of the upper supports of W1, W2 and W3, L1 is the length of the independent temperature section W1, L2 is the length of the independent temperature section W2, L3 is the length of the independent temperature section W3, Q is the temporary node across the temperature expansion joint, G is the temporary rod across the temperature expansion joint, and P is the spacing of the temperature expansion joint. The independent temperature section W2 in the middle is selected as the initial temperature section.

[0082] Bidirectional assembly and error monitoring of the middle independent temperature section W2: In order to reduce the cumulative error, starting from the middle column distance in the length direction of the independent temperature section W2 (initial temperature section), high-altitude bulk assembly is carried out simultaneously in the direction of the temperature expansion joints on both ends. Each time a support is installed, the cumulative error value is recorded and calculated until the last support at the temperature expansion joint position, and the cumulative error value ΔS is obtained. The change value per meter is calculated as: d=ΔS / (L2 / 2), but in actual operation, it is generally not necessary to wait until the temperature expansion joint position to process the temporary node Q and rod G across the expansion joint because there is not enough time in the construction period. Therefore, it is necessary to evaluate and predict the cumulative error value at the n support positions before assembling to the temperature expansion joint, and make a prejudgment in advance. For this reason, the change value per meter is: d2=ΔS / (L2 / 2-nD), and the actual cumulative error ΔS2=d2*(L2 / 2) of the middle temperature section W2.

[0083] Calculation of dynamic pre-bias: The independent temperature section W2 is assembled across the temperature expansion joint to W1 (or W3). The independent temperature section W1 (or W3) is assembled from one end of the temperature expansion joint to the middle until the assembly is completed at the other end. There is also a cumulative error. Therefore, the result of the change value per meter (error unit change value) of the independent temperature section W2 is referred to for evaluation, that is, the cumulative error of the independent temperature section W1 (or W3) ΔS1=d2*(L1 / 2) (or ΔS3=d2*(L3 / 2)). Therefore, when the middle independent temperature section W2 crosses the temperature expansion joint to suspend the temperature section W1 (or W3), the reserved spacing of the temperature expansion joint, that is, the pre-bias distance of the independent temperature section W1 (or W3) installed at the temperature expansion joint position, P 12 =P-(ΔS2+ΔS1)(or P 23 =P-(ΔS2+ΔS3)).

[0084] Design and processing of expansion joint members and nodes: According to the calculated P 12 (P 23 ) value, accurately design and process the temporary node Q and rod G across the expansion joint to ensure that the cumulative error can be compensated during the cantilever assembly process.

[0085] Cantilever construction across expansion joints: Utilize the designed expansion joint rods G and nodes Q to carry out cantilever construction from the completed independent temperature section to the unfinished independent temperature section, with continuous monitoring and adjustments during the process to ensure assembly accuracy.

[0086] It can be seen from the above specific implementation methods that the dynamic pre-biasing method and suspension method for bolted ball grid shell spanning expansion joint suspension provided by the present invention, by determining the initial temperature section, taking the middle position of the initial temperature section as the starting point, and performing high-altitude bulking from the starting point to the two end sides of the initial temperature section, calculating the cumulative error value of each installed support to obtain the predicted cumulative error value, and then calculating the error unit change value of the predicted cumulative error value, thereby calculating the first cumulative error of the initial temperature section from the starting point to the end side; and according to the error unit change value, calculating the adjacent to the initial temperature section The second cumulative error of the independent temperature section from the temperature expansion joint between the two to the middle position of the adjacent independent temperature section across the expansion joint assembly is then obtained based on the first cumulative error and the second cumulative error. The pre-bias distance of the adjacent independent temperature section at the temperature expansion joint position on the end side of the initial temperature section is obtained. Based on this method, the pre-bias distance of all unfinished independent temperature sections of the bolt ball grid shell at the temperature expansion joint position is obtained to accurately design and process the temporary nodes and rods across the expansion joint based on the pre-bias distance, ensuring that the cumulative error can be compensated during the hanging assembly process. The present invention can effectively solve the problem of support deviation after the temperature expansion joint by predicting and compensating for the cumulative error in advance through a dynamic pre-bias strategy; by accurately calculating the pre-bias distance across the expansion joint, it is ensured that the design and processing of the cross-joint rods and nodes meet actual needs and improve the overall construction accuracy; and avoid waiting for the cumulative error to fully appear at the expansion joint position before processing, and prepare the cross-joint components in advance, which can effectively shorten the construction period.

[0087] As described above with reference to the accompanying drawings, the dynamic pre-biasing method and suspension method of bolt ball lattice shell across expansion joint suspension proposed in the present invention are described by way of example. However, those skilled in the art should understand that various improvements can be made to the dynamic pre-biasing method and suspension method of bolt ball lattice shell across expansion joint suspension proposed in the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A dynamic pre-biasing method for bolted ball lattice shells across expansion joints, characterized in that: The steps include: Dividing the bolted ball grid shell into at least two independent temperature sections through the temperature expansion joint, and determining an initial temperature section from the at least two independent temperature sections; Along the length direction of the initial temperature section, the middle position of the initial temperature section is taken as the starting point, and high-altitude bulk loading is performed from the starting point to the end sides on the initial temperature section, and the cumulative error value of each installed support is calculated from the starting point to the end sides until the cumulative number of supports close to the end sides of the initial temperature section is reached, so as to obtain the predicted cumulative error value of the support installed from the starting point to the end sides in the initial temperature section; Calculate the error unit change value of the predicted cumulative error value according to the predicted cumulative error value and the length of the initial temperature section, and calculate the first cumulative error of the initial temperature section from the starting point to the end side according to the error unit change value; When assembling the cross-temperature expansion joint from the temperature expansion joint at the end side of the initial temperature section to the adjacent independent temperature section, the middle position of the adjacent independent temperature section is used as the preset end point of the cross-temperature expansion joint assembly; Calculate, according to the error unit change value and the length of the adjacent independent temperature section, a second cumulative error of assembling the adjacent independent temperature sections across the temperature expansion joint to the predetermined end point; Calculating, based on the first cumulative error and the second cumulative error, a pre-biased distance for starting installation of the adjacent independent temperature sections at the temperature expansion joint position on the end side of the initial temperature section; Dynamic pre-biasing of the bolted ball grid shell across the expansion joint suspension is performed according to the pre-biasing distance.

2. The dynamic pre-biasing method for bolt-ball lattice shell suspension splicing across expansion joints according to claim 1 is characterized in that: After dividing the bolt ball grid shell into at least two independent temperature sections through the temperature expansion joint, the method further includes: The column spacing of the supports on each of the independent temperature sections, the span in the width direction of each of the independent temperature sections, and the spacing of the temperature expansion joints are set to the same value.

3. The dynamic pre-biasing method for bolt-ball lattice shell suspension splicing across expansion joints according to claim 1 is characterized in that: Determining the initial temperature section from at least two independent temperature sections comprises: When the number of the independent temperature sections is two, arbitrarily select one independent temperature section as the initial temperature section; When the number of the independent temperature sections is greater than two, the independent temperature section located in the middle and having the temperature expansion joints disposed on both end sides thereof is selected as the initial temperature section.

4. The dynamic pre-biasing method for bolt-ball lattice shell suspension splicing across expansion joints according to claim 1 is characterized in that: In the initial temperature section, during the high-altitude bulk loading from the starting point to the two end sides, High-altitude bulk loading is carried out simultaneously from the starting point toward both end sides.

5. The dynamic pre-biasing method for bolt-ball lattice shell cantilever assembly across expansion joints according to claim 1 is characterized in that: The front preset number of the end side close to the initial temperature section is an integer greater than or equal to 1.

6. The dynamic pre-biasing method for bolt-ball lattice shell suspension splicing across expansion joints according to claim 1 is characterized in that: The calculation formula of the error unit change value is: d = ΔS / (L 初 / 2-nD); where D is the error unit change value, ΔS is the predicted cumulative error value, L 初 is the length of the initial temperature section, n is the previous preset number close to the end side of the initial temperature section, wherein n is an integer greater than or equal to 0, and D is the spacing of the supports.

7. The method for dynamic pre-biasing of bolt-ball lattice shells across expansion joints according to claim 6 is characterized in that: The calculation formula of the first cumulative error is: ΔS1 = d*(L 初 / 2); among which, ΔS1 is the first cumulative error, d is the error unit change value, L 初 is the length of the initial temperature section.

8. The dynamic pre-biasing method for bolt-ball lattice shell cantilever assembly across expansion joints according to claim 6 is characterized in that: The calculation formula of the second cumulative error is: ΔS2 = d*(L 相邻 / 2); among which, ΔS2 is the second cumulative error, d is the error unit change value, L 相邻 is the length of the adjacent independent temperature zones.

9. The method for dynamic pre-biasing of bolt-ball lattice shells across expansion joints according to claim 1 is characterized in that: The calculation formula of the pre-bias distance is: 12 =P-(ΔS1+ΔS2); where, P 12 is the pre-biased distance of the adjacent independent temperature sections installed starting from the temperature expansion joint position on the end side of the initial temperature section, P is the spacing of the temperature expansion joints, ΔS1 is the first cumulative error, and ΔS2 is the second cumulative error.

10. A bolt ball lattice shell suspension splicing method across expansion joints, characterized in that: The steps include: The dynamic pre-biasing method for bolted ball lattice shell spanning expansion joint suspension as described in any one of claims 1 to 9 is used to determine the pre-biasing distance between two adjacent independent temperature sections; Designing temporary nodes and rods in the temperature expansion joint between two adjacent independent temperature sections according to the pre-biased distance; Based on the design of the temporary nodes and the rods, cantilever construction is performed from the completed independent temperature section to the unfinished independent temperature section.

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