Prefabricated outer wall abutted seam construction method

Abstract

The invention relates to the technical field of building construction, in particular to a prefabricated outer wall abutted seam construction method which comprises the steps that vertical connecting holes are formed in a bottom beam and the bottom face of a first prefabricated outer wall correspondingly; mounting a vertical connecting bolt; smearing an adhesive; one end, coated with the adhesive, of the vertical connecting bolt is inserted into the vertical connecting hole, and after the adhesive is dried, the formwork and the supporting structure are installed, and grouting and joint filling are conducted; judging whether the construction of the horizontal abutted seam meets a preset standard or not according to the transverse limit cracking characteristic value; transverse connecting holes are formed, and transverse connecting bolts are installed; the end, coated with the adhesive, of the transverse connecting bolt is inserted into the transverse connecting hole, and whether construction of the vertical abutted seam meets the preset standard or not is judged according to the amplitude characteristic value of the wall; the splicing construction of the prefabricated outer wall is completed according to the vertical splicing construction method conforming to the preset standard and the horizontal splicing construction method conforming to the preset standard, and the splicing construction quality of the prefabricated outer wall is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a prefabricated exterior wall joint construction method. Background Art

[0002] Prefabricated exterior walls refer to new exterior wall materials that are pre-processed and manufactured in factories into standardized, modular components, and then directly transported to the construction site for assembly and installation.

[0003] After the exterior walls of prefabricated buildings are hoisted, gaps will appear between adjacent wall panels. These gaps need to be patchworked to ensure the waterproofness of the building and the overall performance of the structure.

[0004] Chinese patent publication number: CN116084581A, discloses a joint processing construction method for prefabricated exterior walls, including the following steps: S1, set longitudinal hanging wires and transverse through wires along the first longitudinal joint and the first transverse joint respectively and measure the deviation; S2, block the first longitudinal joint and the first transverse joint deviation part; S3, cut and cut the first longitudinal joint and the first transverse joint to form a second transverse joint and a second longitudinal joint; S4, insert the sealing strip into the second longitudinal joint; S5, insert the foaming rod into the second transverse joint and the second longitudinal joint; S6, insert the conduit at intervals along the extension direction of the second longitudinal joint obliquely downward; S7, use the sealant to block the second transverse joint and the second longitudinal joint respectively. It can be seen that the above technical solution lacks the necessary detection of the joint process of the prefabricated exterior wall, which makes it difficult to detect and regulate the defects in the joint process in time, resulting in poor quality of the joints of the prefabricated exterior wall. Summary of the invention

[0005] To this end, the present invention provides a prefabricated exterior wall joint construction method to overcome the problem in the prior art of lacking necessary detection in the prefabricated exterior wall joint process, which makes it difficult to detect and regulate defects in the joint process in a timely manner, resulting in poor quality of the prefabricated exterior wall joints.

[0006] To achieve the above object, the present invention provides a prefabricated exterior wall joint construction method, comprising:

[0007] Obtaining size information and weight information of the prefabricated exterior wall, wherein the size information includes the length, width, and thickness of a single prefabricated exterior wall;

[0008] Based on the size information and weight information of the prefabricated exterior wall, vertical connection holes with preset depths and equal spacing are respectively opened at corresponding positions of the bottom beam and the bottom surface of the first prefabricated exterior wall; a plurality of vertical connection bolts are installed in the vertical connection holes on the bottom surface of the first prefabricated exterior wall, wherein adhesive is applied to one end of the vertical connection bolt away from the vertical connection hole;

[0009] Use a crane to move the first preset exterior wall with the vertical connection bolt installed to the top of the bottom beam, and insert the end of the vertical connection bolt coated with adhesive into the vertical connection hole on the bottom beam, wherein a preset horizontal spacing is set between the bottom surface of the first prefabricated exterior wall and the bottom beam; after the adhesive is dried, install the formwork and the supporting structure and grout the preset horizontal spacing;

[0010] Obtaining a transverse limit cracking characteristic value, and determining whether the construction of the horizontal joint meets a preset standard according to the transverse limit cracking characteristic value;

[0011] When the construction of the horizontal joints meets the preset standards, the horizontal joints of the prefabricated exterior wall described later are completed according to the construction parameters of the current horizontal joints;

[0012] Open transverse connection holes of preset depth and distributed at equal intervals at corresponding positions of the side surface of the first prefabricated exterior wall and the side surface of the second prefabricated exterior wall respectively, and install a plurality of transverse connection bolts in the transverse connection holes on the side surface of the second prefabricated exterior wall; use a crane to move the second prefabricated exterior wall with the transverse connection bolts installed to the side of the first prefabricated exterior wall with the transverse connection holes opened, and after aligning the transverse connection holes, apply adhesive to the transverse connection bolts and insert them into the transverse connection holes of the first prefabricated exterior wall, wherein a preset vertical spacing is set between the side surface of the first prefabricated exterior wall and the second prefabricated exterior wall; after the adhesive is dried, install the formwork and the supporting structure and perform grouting and filling of the preset vertical spacing;

[0013] Obtaining the wall amplitude characteristic value and determining whether the construction of the vertical joint meets the preset standard according to the wall amplitude characteristic value;

[0014] The subsequent joint construction of the prefabricated exterior wall is completed according to the construction parameters of the vertical joints that meet the preset standards and the horizontal joints that meet the preset standards.

[0015] Further, whether the construction of the horizontal joint meets the preset standard is determined according to the transverse limit cracking characteristic value, wherein:

[0016] If the transverse limit cracking characteristic value is less than a first preset cracking threshold, it is determined that the construction of the horizontal joint does not meet the preset standard, and the arrangement density of the vertical connecting bolts is increased according to the difference between the limit cracking characteristic value and the first preset cracking threshold;

[0017] If the limit cracking characteristic value is greater than or equal to the first preset cracking characteristic value and less than the second preset cracking characteristic value, it is determined that the construction of the horizontal joint does not meet the preset standard, and the reason why the construction of the horizontal joint does not meet the preset standard is determined according to the crack characteristic density;

[0018] If the limit cracking characteristic value is greater than or equal to the second preset characteristic value, it is determined that the construction of the horizontal joint meets the preset standard, and the subsequent horizontal joint of the prefabricated exterior wall is completed according to the construction parameters of the current horizontal joint.

[0019] Furthermore, the process of obtaining the transverse limit cracking characteristic value includes:

[0020] Arranging an inclination measuring instrument along the vertical direction of the first prefabricated exterior wall;

[0021] Industrial cameras are arranged along both sides of the horizontal joint;

[0022] Loading at the center of the first prefabricated exterior wall to tilt the first prefabricated exterior wall;

[0023] When the industrial camera detects cracks on the horizontal joint surface on either side and the total length of the cracks exceeds a preset length threshold, the slope angle of the first prefabricated exterior wall is recorded;

[0024] The recorded inclination angle is recorded as the transverse limit cracking characteristic value.

[0025] Furthermore, several density increasing methods are provided for increasing the arrangement density of the vertical connection bolts, and each density increasing method increases the arrangement density of the vertical connection bolts by a different amount.

[0026] Furthermore, under the first preset condition, several correction methods are set for the layout density of the vertical connecting bolts, and each correction method has a different correction range for the layout density of the vertical connecting bolts; the first preset condition is that after the layout density of the vertical connecting bolts increases, the compressive strength of the first prefabricated exterior wall is less than the preset compressive strength; the compressive strength is measured using an ultrasonic rebound tester.

[0027] Further, the reason why the construction of the horizontal joint does not meet the preset standard is determined according to the crack characteristic density, wherein:

[0028] If the crack characteristic density is less than a preset crack characteristic density threshold, it is determined that the reason why the construction of the horizontal joint does not meet the preset standard is that the preset transverse spacing does not meet the standard, and the preset transverse spacing is increased according to the difference between the preset crack characteristic density threshold and the crack characteristic density;

[0029] If the crack characteristic density is greater than or equal to the preset crack characteristic density threshold, it is determined that the reason why the construction of the horizontal joint does not meet the preset standard is that the preset depth of the vertical connection hole does not meet the standard, and the preset depth of the vertical connection hole is increased according to the difference between the crack characteristic density and the preset crack characteristic density threshold;

[0030] The crack characteristic density is the total length of cracks per unit area of ​​the horizontal joint surface.

[0031] Furthermore, several depth increasing methods are provided for increasing the preset depth of the vertical connection hole, and each depth increasing method increases the preset depth of the vertical connection hole by a different amount.

[0032] Further, it is determined whether the construction of the vertical joint meets the preset standard according to the wall amplitude characteristic value, wherein:

[0033] If the wall amplitude characteristic value is less than a first preset amplitude threshold, it is determined that the construction of the vertical joint does not meet the preset standard, and the vertical spacing in the subsequent vertical joint construction is reduced according to the difference between the wall amplitude characteristic value and the first preset amplitude threshold;

[0034] If the wall amplitude characteristic value is greater than or equal to the first preset amplitude threshold and less than the second preset amplitude threshold, it is determined that the construction of the vertical joint does not meet the preset standard, and a second determination is made based on the cross-sectional characteristic value whether the construction of the vertical joint meets the preset standard;

[0035] If the wall amplitude characteristic value is greater than or equal to the second preset amplitude threshold, it is determined that the construction of the vertical joint meets the preset standard, and the subsequent vertical joint of the prefabricated exterior wall is completed according to the construction parameters of the current vertical joint;

[0036] The wall amplitude characteristic value is a ratio between the amplitude of the first prefabricated exterior wall and the preset amplitude of the second prefabricated exterior wall.

[0037] Furthermore, the reduction range of the preset vertical spacing is positively correlated with the amplitude difference; the amplitude difference is the difference between the wall amplitude characteristic value and the first preset amplitude threshold.

[0038] Further, a second determination is made based on the cross-sectional characteristic value whether the construction of the vertical joint meets the preset standard, wherein:

[0039] If the cross-sectional characteristic value is less than the preset cross-sectional characteristic value, it is determined that the construction of the vertical joint does not meet the preset standard, and the diameter of the horizontal connection hole is reduced according to the difference between the preset cross-sectional characteristic value and the cross-sectional characteristic value;

[0040] If the cross-sectional characteristic value is greater than or equal to the preset cross-sectional characteristic value, it is determined that the construction of the vertical joint meets the preset standard, and the subsequent vertical joint of the prefabricated exterior wall is completed according to the construction parameters of the current vertical joint;

[0041] The cross-sectional characteristic value is a ratio between an area of ​​a cross section of the transverse connecting bolt and an area of ​​a cross section of the transverse connecting hole.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention connects the exterior wall and the base, and the exterior wall and the exterior wall through connecting holes and connecting bolts coated with adhesive, thereby improving the structural stability; after the adhesive is dried, the formwork and the supporting structure are installed and the preset horizontal spacing or the preset vertical spacing is grouted and filled, thereby improving the waterproofness of the exterior wall; whether the construction of the horizontal joints meets the preset standards is evaluated by the transverse limit cracking characteristic value and the crack characteristic density, and at the same time, the construction of the vertical joints is inspected according to the wall amplitude characteristic value and the cross-sectional characteristic value, thereby realizing real-time monitoring and timely adjustment of the construction process of the prefabricated exterior wall joints, thereby improving the joint quality of the prefabricated exterior wall.

[0043] Furthermore, the present invention determines whether the construction of the horizontal joint meets the preset standard according to the transverse limit cracking characteristic value, and adjusts the layout density of the vertical connecting bolts in real time according to the determination result, thereby improving the construction efficiency.

[0044] Furthermore, the present invention provides a quantitative evaluation index for the construction of horizontal joints by setting a transverse limit cracking characteristic value, thereby improving the reliability of the evaluation.

[0045] Furthermore, the present invention provides several density increasing methods for increasing the arrangement density of the vertical connecting bolts, and each density increasing method increases the arrangement density of the vertical connecting bolts by a different amount, thereby achieving precise control of the arrangement density of the vertical connecting bolts.

[0046] Furthermore, the present invention determines the reason why the construction of the horizontal joint does not meet the preset standard based on the crack characteristic density, and can accurately identify the specific reason why the construction does not meet the preset standard, and then provide targeted adjustment strategies based on the specific reason, thereby improving the construction quality.

[0047] Furthermore, the present invention determines whether the construction of the vertical joint meets the preset standard according to the wall amplitude characteristic value, thereby realizing intelligent control of the construction process.

[0048] Furthermore, the present invention realizes precise control of the reduction amplitude of the preset vertical spacing by setting the reduction amplitude of the preset vertical spacing to be positively correlated with the amplitude difference.

[0049] Furthermore, the present invention determines whether the construction of the vertical joint meets the preset standard based on the cross-sectional characteristic value, thereby optimizing the construction method and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1It is a flow chart of the prefabricated exterior wall joint construction method according to an embodiment of the present invention;

[0051] Figure 2 A flow chart of an embodiment of the present invention for determining whether the construction of the horizontal joint meets the preset standard;

[0052] Figure 3 A flow chart of determining whether the construction of the vertical joint meets the preset standard according to an embodiment of the present invention;

[0053] Figure 4 The present invention is a flowchart of a second determination of whether the construction of the vertical joint meets the preset standard. DETAILED DESCRIPTION

[0054] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] It should be pointed out that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical detection data and the corresponding historical detection results three months before the image processing by the method of the present invention. It can be understood by those skilled in the art that the method of the present invention can determine the above parameters for a single item by selecting the value with the highest proportion as the preset standard parameter according to the data distribution, using weighted summation to use the obtained value as the preset standard parameter, substituting each historical data into a specific formula and using the value obtained by the formula as the preset standard parameter or other selection methods, as long as the method of the present invention can clearly define the different specific situations in the single determination process through the obtained values.

[0056] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0057] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a flow chart of a prefabricated exterior wall joint construction method according to an embodiment of the present invention; a flow chart of determining whether the construction of the horizontal joint meets the preset standard according to an embodiment of the present invention; a flow chart of determining whether the construction of the vertical joint meets the preset standard according to an embodiment of the present invention; and a flow chart of determining whether the construction of the vertical joint meets the preset standard for a second time according to an embodiment of the present invention.

[0058] A prefabricated exterior wall joint construction method according to an embodiment of the present invention comprises:

[0059] Step S1, obtaining size information and weight information of a prefabricated exterior wall, wherein the size information includes the length, width and thickness of a single prefabricated exterior wall;

[0060] Step S2, based on the size information and weight information of the prefabricated exterior wall, vertical connection holes with a preset depth of 25 mm and an equal spacing of 200 mm are respectively opened at corresponding positions of the bottom beam and the bottom surface of the first prefabricated exterior wall; a plurality of vertical connection bolts are installed in the vertical connection holes on the bottom surface of the first prefabricated exterior wall, wherein an end of the vertical connection bolt away from the vertical connection hole is coated with adhesive;

[0061] Step S3, using a crane to move the first preset exterior wall installed with the vertical connection bolt to the top of the bottom beam, inserting one end of the vertical connection bolt coated with adhesive into the vertical connection hole on the bottom beam, wherein a preset horizontal spacing of 20 mm is set between the bottom surface of the first prefabricated exterior wall and the bottom beam; after the adhesive is dried, installing the formwork and the supporting structure and grouting the preset horizontal spacing;

[0062] Step S4, obtaining a transverse limit cracking characteristic value, and determining whether the construction of the horizontal joint meets a preset standard according to the transverse limit cracking characteristic value;

[0063] Step S5, when the construction of the horizontal joints meets the preset standard, the subsequent horizontal joints of the prefabricated exterior wall are completed according to the construction parameters of the current horizontal joints;

[0064] Step S6, respectively opening transverse connection holes with a preset depth of 30 mm and an equal spacing of 250 mm at corresponding positions of the side surface of the first prefabricated exterior wall and the side surface of the second prefabricated exterior wall, and installing a plurality of transverse connection bolts in the transverse connection holes on the side surface of the second prefabricated exterior wall; using a crane to move the second prefabricated exterior wall with the transverse connection bolts installed to the side of the first prefabricated exterior wall with the transverse connection holes opened, and after aligning the transverse connection holes, applying adhesive to the transverse connection bolts and inserting them into the transverse connection holes of the first prefabricated exterior wall, wherein a preset vertical spacing of 30 mm is set between the side surface of the first prefabricated exterior wall and the second prefabricated exterior wall; after the adhesive is dried, installing the formwork and the supporting structure and grouting the preset vertical spacing;

[0065] Step S7, obtaining the wall amplitude characteristic value and determining whether the construction of the vertical joint meets the preset standard according to the wall amplitude characteristic value;

[0066] Step S8, completing the subsequent joint construction of the prefabricated exterior wall according to the construction parameters of the vertical joints that meet the preset standards and the horizontal joints that meet the preset standards.

[0067] In this embodiment, the grouting material in the grouting and grouting operation can be an ordinary cement slurry mixed with 45% cement, 35% fine sand and water, or a silicate slurry mixed with 55% silicate cement, 20% quartz sand, 3% sodium pyrophosphate retarder and water. There is no specific limitation, as long as the requirements of grouting and grouting are met.

[0068] Specifically, whether the construction of the horizontal joint meets the preset standard is determined according to the transverse limit cracking characteristic value, wherein:

[0069] If the transverse limit cracking characteristic value is less than the first preset cracking threshold value of 3°, it is determined that the construction of the horizontal joint does not meet the preset standard, and the arrangement density of the vertical connecting bolts is increased according to the difference between the limit cracking characteristic value and the first preset cracking threshold value;

[0070] If the limit cracking characteristic value is greater than or equal to the first preset cracking characteristic value and less than the second preset cracking characteristic value 5°, it is determined that the construction of the horizontal joint does not meet the preset standard, and the reason why the construction of the horizontal joint does not meet the preset standard is determined according to the crack characteristic density;

[0071] If the limit cracking characteristic value is greater than or equal to the second preset characteristic value, it is determined that the construction of the horizontal joint meets the preset standard, and the subsequent horizontal joint of the prefabricated exterior wall is completed according to the construction parameters of the current horizontal joint.

[0072] Specifically, the process of obtaining the transverse limit cracking characteristic value includes:

[0073] Arranging an inclination measuring instrument along the vertical direction of the first prefabricated exterior wall;

[0074] Industrial cameras are arranged along both sides of the horizontal joint;

[0075] Loading at the center of the first prefabricated exterior wall to tilt the first prefabricated exterior wall;

[0076] When the industrial camera detects cracks on the horizontal joint surface on either side and the total length of the cracks exceeds a preset length threshold of 58 mm, the slope angle of the first prefabricated exterior wall is recorded;

[0077] The recorded inclination angle is recorded as the transverse limit cracking characteristic value.

[0078] Specifically, there are several density increasing methods for increasing the arrangement density of the vertical connection bolts, wherein:

[0079] If the cracking difference is less than the first preset cracking difference of 0.6°, the first density adjustment coefficient is used to increase the arrangement density of the vertical connecting bolts by 1.14;

[0080] If the cracking difference is greater than or equal to the first preset cracking difference and less than the second preset cracking difference of 1.3°, the second density adjustment coefficient of 1.16 is used to increase the arrangement density of the vertical connecting bolts;

[0081] If the cracking difference is greater than or equal to the second preset cracking difference, the third density adjustment coefficient of 1.18 is used to increase the arrangement density of the vertical connecting bolts;

[0082] The cracking difference is the difference between the limit cracking characteristic value and the first preset cracking threshold.

[0083] Specifically, under the first preset condition, several correction methods are provided for the arrangement density of the vertical connection bolts, wherein:

[0084] If the compressive strength difference is less than the first preset compressive strength difference of 0.88 MPa, the first correction coefficient of 0.98 is used to correct the arrangement density of the vertical connecting bolts;

[0085] If the compressive strength difference is greater than or equal to the first preset compressive strength difference and less than the second preset compressive strength difference of 1.75 MPa, the second correction coefficient of 0.96 is used to correct the arrangement density of the vertical connecting bolts;

[0086] If the compressive strength difference is greater than or equal to the second preset compressive strength difference, the arrangement density of the vertical connecting bolts is corrected using a third correction coefficient of 0.94;

[0087] The first preset condition is that after the arrangement density of the vertical connecting bolts increases, the compressive strength of the first prefabricated exterior wall is less than the preset compressive strength of 8.5 MPa; the compressive strength is measured using an ultrasonic rebound tester; the compressive strength difference is the difference between the preset compressive strength and the compressive strength of the first prefabricated exterior wall.

[0088] Specifically, the reason why the construction of the horizontal joint does not meet the preset standard is determined according to the crack characteristic density, wherein:

[0089] If the crack characteristic density is less than the preset crack characteristic density threshold of 5.71 mm / cm 2 , it is determined that the reason why the construction of the horizontal joint does not meet the preset standard is that the preset transverse spacing does not meet the standard, and the preset transverse spacing is increased according to the difference between the preset crack feature density threshold and the crack feature density;

[0090] If the crack characteristic density is greater than or equal to the preset crack characteristic density threshold, it is determined that the reason why the construction of the horizontal joint does not meet the preset standard is that the preset depth of the vertical connection hole does not meet the standard, and the preset depth of the vertical connection hole is increased according to the difference between the crack characteristic density and the preset crack characteristic density threshold;

[0091] The crack characteristic density is the total length of cracks per unit area of ​​the horizontal joint surface.

[0092] Specifically, there are several depth increasing methods for increasing the preset depth of the vertical connection hole, wherein:

[0093] If the crack characteristic density difference is less than the first preset crack characteristic density difference of 1.65, the first depth adjustment coefficient is used to increase the preset depth of the vertical connection hole by 1.15;

[0094] If the crack characteristic density difference is greater than or equal to the first preset crack characteristic density difference and less than the second preset crack characteristic density difference of 3.12, then the preset depth of the vertical connection hole is increased by using the second depth adjustment coefficient of 1.17;

[0095] If the crack characteristic density difference is greater than or equal to the second preset crack characteristic density difference, a third density adjustment coefficient of 1.19 is used to increase the preset depth of the vertical connection hole;

[0096] The crack feature density difference is the difference between the crack feature density and the preset crack feature density threshold.

[0097] Specifically, whether the construction of the vertical joint meets the preset standard is determined according to the wall amplitude characteristic value, wherein:

[0098] If the wall amplitude characteristic value is less than a first preset amplitude threshold value of 0.45, it is determined that the construction of the vertical joint does not meet the preset standard, and the vertical spacing in the subsequent vertical joint construction is reduced according to the difference between the wall amplitude characteristic value and the first preset amplitude threshold value;

[0099] If the wall amplitude characteristic value is greater than or equal to the first preset amplitude threshold and less than the second preset amplitude threshold 0.67, it is determined that the construction of the vertical joint does not meet the preset standard, and a second determination is made based on the cross-sectional characteristic value whether the construction of the vertical joint meets the preset standard;

[0100] If the wall amplitude characteristic value is greater than or equal to the second preset amplitude threshold, it is determined that the construction of the vertical joint meets the preset standard, and the subsequent vertical joint of the prefabricated exterior wall is completed according to the construction parameters of the current vertical joint;

[0101] The wall amplitude characteristic value is the ratio between the amplitude of the first prefabricated exterior wall and the preset amplitude of 145 mm of the second prefabricated exterior wall.

[0102] In this embodiment, after grouting and drying the preset vertical spacing, a vibrator is used to vibrate the center point of the second prefabricated exterior wall so that the center point of the second prefabricated exterior wall reaches a preset amplitude of 145 mm. At the same time, the first prefabricated exterior wall responds to the vibration, and a vibration sensor is used to measure the amplitude of the center point of the first prefabricated exterior wall. It can be understood that the wall amplitude characteristic value reflects whether the displacement of the first prefabricated exterior wall changes and the amplitude of the displacement change when the displacement of the second prefabricated exterior wall changes. The closer the ratio of the amplitude of the first prefabricated exterior wall to the preset amplitude of the second prefabricated exterior wall is to 1, the better the connection performance of the first prefabricated exterior wall to the second prefabricated exterior wall through the vertical joint.

[0103] Specifically, the reduction amplitude of the preset vertical spacing is positively correlated with the amplitude difference, and the positive correlation may be, for example, linear positive correlation or nonlinear positive correlation. The slope of the linear positive correlation is not specifically limited. It can be understood that the larger the amplitude difference, the larger the reduction amplitude of the preset vertical spacing. The amplitude difference is the difference between the wall amplitude characteristic value and the first preset amplitude threshold.

[0104] Specifically, it is determined whether the construction of the vertical joint meets the preset standard based on the cross-sectional characteristic value, wherein:

[0105] If the cross-sectional characteristic value is less than the preset cross-sectional characteristic value of 0.67, it is determined that the construction of the vertical joint does not meet the preset standard, and the diameter of the horizontal connection hole is reduced according to the difference between the preset cross-sectional characteristic value and the cross-sectional characteristic value;

[0106] If the cross-sectional characteristic value is greater than or equal to the preset cross-sectional characteristic value, it is determined that the construction of the vertical joint meets the preset standard, and the subsequent vertical joint of the prefabricated exterior wall is completed according to the construction parameters of the current vertical joint;

[0107] The cross-sectional characteristic value is a ratio between an area of ​​a cross section of the transverse connecting bolt and an area of ​​a cross section of the transverse connecting hole.

[0108] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prefabricated exterior wall joint construction method, characterized in that: Obtaining size information and weight information of the prefabricated exterior wall, wherein the size information includes the length, width, and thickness of a single prefabricated exterior wall; Based on the size information and weight information of the prefabricated exterior wall, vertical connection holes with preset depths and equal spacing are respectively opened at corresponding positions of the bottom beam and the bottom surface of the first prefabricated exterior wall; a plurality of vertical connection bolts are installed in the vertical connection holes on the bottom surface of the first prefabricated exterior wall, wherein adhesive is applied to one end of the vertical connection bolt away from the vertical connection hole; Use a crane to move the first preset exterior wall with the vertical connection bolt installed to the top of the bottom beam, and insert the end of the vertical connection bolt coated with adhesive into the vertical connection hole on the bottom beam, wherein a preset horizontal spacing is set between the bottom surface of the first prefabricated exterior wall and the bottom beam; after the adhesive is dried, install the formwork and the supporting structure and grout the preset horizontal spacing; Obtaining a transverse limit cracking characteristic value, and determining whether the construction of the horizontal joint meets a preset standard according to the transverse limit cracking characteristic value; When the construction of the horizontal joints meets the preset standards, the horizontal joints of the prefabricated exterior wall described later are completed according to the construction parameters of the current horizontal joints; Open transverse connection holes of preset depth and distributed at equal intervals at corresponding positions of the side surface of the first prefabricated exterior wall and the side surface of the second prefabricated exterior wall respectively, and install a plurality of transverse connection bolts in the transverse connection holes on the side surface of the second prefabricated exterior wall; use a crane to move the second prefabricated exterior wall with the transverse connection bolts installed to the side of the first prefabricated exterior wall with the transverse connection holes opened, and after aligning the transverse connection holes, apply adhesive to the transverse connection bolts and insert them into the transverse connection holes of the first prefabricated exterior wall, wherein a preset vertical spacing is set between the side surface of the first prefabricated exterior wall and the second prefabricated exterior wall; after the adhesive is dried, install the formwork and the supporting structure and perform grouting and filling of the preset vertical spacing; Obtaining the wall amplitude characteristic value and determining whether the construction of the vertical joint meets the preset standard according to the wall amplitude characteristic value; The subsequent joint construction of the prefabricated exterior wall is completed according to the construction parameters of the vertical joints that meet the preset standards and the horizontal joints that meet the preset standards.

2. The prefabricated exterior wall joint construction method according to claim 1, characterized in that: According to the transverse limit cracking characteristic value, it is determined whether the construction of the horizontal joint meets the preset standard, wherein: If the transverse limit cracking characteristic value is less than a first preset cracking threshold, it is determined that the construction of the horizontal joint does not meet the preset standard, and the arrangement density of the vertical connecting bolts is increased according to the difference between the limit cracking characteristic value and the first preset cracking threshold; If the limit cracking characteristic value is greater than or equal to the first preset cracking characteristic value and less than the second preset cracking characteristic value, it is determined that the construction of the horizontal joint does not meet the preset standard, and the reason why the construction of the horizontal joint does not meet the preset standard is determined according to the crack characteristic density; If the limit cracking characteristic value is greater than or equal to the second preset characteristic value, it is determined that the construction of the horizontal joint meets the preset standard, and the subsequent horizontal joint of the prefabricated exterior wall is completed according to the construction parameters of the current horizontal joint.

3. The prefabricated exterior wall joint construction method according to claim 2, characterized in that: The process of obtaining the transverse limit cracking characteristic value includes: Arranging an inclination measuring instrument along the vertical direction of the first prefabricated exterior wall; Industrial cameras are arranged along both sides of the horizontal joint; Loading at the center of the first prefabricated exterior wall to tilt the first prefabricated exterior wall; When the industrial camera detects cracks on the horizontal joint surface on either side and the total length of the cracks exceeds a preset length threshold, the slope angle of the first prefabricated exterior wall is recorded; The recorded inclination angle is recorded as the transverse limit cracking characteristic value.

4. The prefabricated exterior wall joint construction method according to claim 3 is characterized in that: There are several density increasing methods for increasing the arrangement density of the vertical connection bolts, and each density increasing method increases the arrangement density of the vertical connection bolts by a different amount.

5. The prefabricated exterior wall joint construction method according to claim 4, characterized in that: Under the first preset condition, several correction methods are set for the layout density of the vertical connecting bolts, and each correction method has a different correction range for the layout density of the vertical connecting bolts; the first preset condition is that after the layout density of the vertical connecting bolts increases, the compressive strength of the first prefabricated exterior wall is less than the preset compressive strength; the compressive strength is measured using an ultrasonic rebound tester.

6. The prefabricated exterior wall joint construction method according to claim 5, characterized in that: The reason why the construction of the horizontal joint does not meet the preset standard is determined according to the crack characteristic density, wherein: If the crack characteristic density is less than a preset crack characteristic density threshold, it is determined that the reason why the construction of the horizontal joint does not meet the preset standard is that the preset transverse spacing does not meet the standard, and the preset transverse spacing is increased according to the difference between the preset crack characteristic density threshold and the crack characteristic density; If the crack characteristic density is greater than or equal to the preset crack characteristic density threshold, it is determined that the reason why the construction of the horizontal joint does not meet the preset standard is that the preset depth of the vertical connection hole does not meet the standard, and the preset depth of the vertical connection hole is increased according to the difference between the crack characteristic density and the preset crack characteristic density threshold; The crack characteristic density is the total length of cracks per unit area of ​​the horizontal joint surface.

7. The prefabricated exterior wall joint construction method according to claim 6, characterized in that: There are several depth increasing methods for increasing the preset depth of the vertical connection hole, and each depth increasing method has a different increase range for the preset depth of the vertical connection hole.

8. The prefabricated exterior wall joint construction method according to claim 7, characterized in that: According to the wall amplitude characteristic value, it is determined whether the construction of the vertical joint meets the preset standard, wherein: If the wall amplitude characteristic value is less than a first preset amplitude threshold, it is determined that the construction of the vertical joint does not meet the preset standard, and the vertical spacing in the subsequent vertical joint construction is reduced according to the difference between the wall amplitude characteristic value and the first preset amplitude threshold; If the wall amplitude characteristic value is greater than or equal to the first preset amplitude threshold and less than the second preset amplitude threshold, it is determined that the construction of the vertical joint does not meet the preset standard, and a second determination is made based on the cross-sectional characteristic value whether the construction of the vertical joint meets the preset standard; If the wall amplitude characteristic value is greater than or equal to the second preset amplitude threshold, it is determined that the construction of the vertical joint meets the preset standard, and the subsequent vertical joint of the prefabricated exterior wall is completed according to the construction parameters of the current vertical joint; The wall amplitude characteristic value is a ratio between the amplitude of the first prefabricated exterior wall and the preset amplitude of the second prefabricated exterior wall.

9. The prefabricated exterior wall joint construction method according to claim 8, characterized in that: The reduction range of the preset vertical spacing is positively correlated with the amplitude difference; the amplitude difference is the difference between the wall amplitude characteristic value and the first preset amplitude threshold.

10. The prefabricated exterior wall joint construction method according to claim 9, characterized in that: A second determination is made based on the cross-sectional characteristic value whether the construction of the vertical joint meets the preset standard, wherein: If the cross-sectional characteristic value is less than the preset cross-sectional characteristic value, it is determined that the construction of the vertical joint does not meet the preset standard, and the diameter of the horizontal connection hole is reduced according to the difference between the preset cross-sectional characteristic value and the cross-sectional characteristic value; If the cross-sectional characteristic value is greater than or equal to the preset cross-sectional characteristic value, it is determined that the construction of the vertical joint meets the preset standard, and the subsequent vertical joint of the prefabricated exterior wall is completed according to the construction parameters of the current vertical joint; The cross-sectional characteristic value is a ratio between an area of ​​a cross section of the transverse connecting bolt and an area of ​​a cross section of the transverse connecting hole.

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