A grouting shear-resistant connection joint structure for module construction and its construction method

Abstract

The present application relates to a grouting shear-resistant connection node structure for module construction and its construction method, belonging to the technical field of building construction. It includes two box-type structural units, four L-shaped plates, a fixing component, and a grout-passing component; the box-type structural unit includes four cross beams, four vertical beams, and four longitudinal beams. The four L-shaped plates are respectively arranged at the four corners of the connection node of the two box-type structural units. An inlet for grout is opened on the side wall of the vertical beam below the L-shaped plate, and a lower plug plate is arranged in the inner cavity of the vertical beam, with the lower plug plate located below the inlet for grout. An outlet for grout is opened on the side wall of the vertical beam above the L-shaped plate, and an upper plug plate is arranged in the inner cavity of the vertical beam, with the upper plug plate located above the outlet for grout; the grout-passing component includes a grout-passing pipe and a limiting block sleeved on the grout-passing pipe. The limiting block is fixedly connected to the grout-passing pipe, and the bottom wall of the limiting block abuts against the top wall of the L-shaped plate. A guiding block is arranged in the inner cavity of the vertical beam above the L-shaped plate, and a conical through hole is opened on the guiding block. The present application has the advantage of improving the matching accuracy of the two box-type structural units.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and in particular to a grouting shear-resistant connection node structure for modular construction and its construction method. Background Technique

[0002] Building construction refers to the production activities in the implementation stage of project construction, which is the construction process of various buildings. It can also be said to be the process of turning the various lines on the design drawings into physical objects at the designated location. During building construction, in order to improve construction efficiency, multiple box-type structural units are usually installed together for modular construction.

[0003] In the related art, the box-type structural unit is a cuboid frame structure formed by connecting cross beams, vertical beams, and longitudinal beams. During the modular construction process, one box-type structural unit needs to be stacked on another box-type structural unit, and the connection nodes of the two structural units are fixed by using positioning bolts and on-site welding.

[0004] In view of the above-mentioned related art, when the two box-type structural units are welded on-site, the connection nodes of the two box-type structural units are not easy to fit, and there is a defect of poor fitting accuracy between the two box-type structural units. Summary of the Invention

[0005] In order to improve the fitting accuracy between two box-type structural units, this application provides a grouting shear-resistant connection node structure for modular construction and its construction method.

[0006] In the first aspect, a grouting shear-resistant connection node structure for modular construction provided by this application adopts the following technical solution:

[0007] A grouting shear-resistant connection node structure for modular construction includes two box-type structural units. Each box-type structural unit includes four cross beams, four vertical beams, and four longitudinal beams. One cross beam, one longitudinal beam, and one vertical beam are fixedly connected together to form a space right-angle structure. It also includes four L-shaped plates, fixing components arranged on each L-shaped plate, and grout-passing components arranged on each L-shaped plate;

[0008] The four L-shaped plates are respectively arranged at the four corners of the connection nodes of the two box-type structural units, and each L-shaped plate is located between the two box-type structural units. The bottom end of the vertical beam of one box-type structural unit abuts against the top wall of the L-shaped plate, and the top end of the vertical beam of the other box-type structural unit abuts against the bottom wall of the L-shaped plate. A slurry inlet is formed in the side wall of the vertical beam below the L-shaped plate, and a lower plug plate is arranged in the inner cavity of the vertical beam. The lower plug plate is located below the slurry inlet. An slurry outlet is formed in the side wall of the vertical beam above the L-shaped plate, and an upper plug plate is arranged in the inner cavity of the vertical beam. The upper plug plate is located above the slurry outlet; the slurry passing assembly is used to pass the concrete slurry in the vertical beam below the L-shaped plate into the inner cavity of the vertical beam above the L-shaped plate;

[0009] The slurry passing assembly includes a slurry passing pipe and a limiting block sleeved on the slurry passing pipe. The slurry passing pipe vertically penetrates the L-shaped plate and is slidably connected to the L-shaped plate. One end of the slurry passing pipe extends into the inner cavity of the vertical beam of one box-type structural unit, and the other end extends into the inner cavity of the vertical beam of the other box-type structural unit. The limiting block is fixedly connected to the slurry passing pipe, and the bottom wall of the limiting block abuts against the top wall of the L-shaped plate. A guiding block is arranged in the inner cavity of the vertical beam above the L-shaped plate. A tapered through hole for the slurry passing pipe to pass through is formed in the guiding block, and the cross section of the tapered through hole gradually increases from top to bottom;

[0010] The fixing assembly is used to fixedly connect the two box-type structural units.

[0011] By adopting the above technical solution, first fix a box structure unit, then install the L-shaped plate on the top wall of the vertical beam of the fixed box structure unit. Next, pass the grouting pipe through the L-shaped plate and extend it into the inner cavity of the vertical beam, and make the limiting block abut against the top wall of the L-shaped plate. Then fix the grouting pipe and the limiting block. Next, hoist the second box structure unit so that the bottom end of the vertical beam of the second box structure unit abuts against the L-shaped plate. During the descent of the second box structure unit, the grouting pipe extends into the inner cavity of the vertical beam of the second box structure unit and passes through the tapered through hole on the guiding block until the bottom end of the vertical beam of the second box structure unit abuts against the top wall of the L-shaped plate. Then fix the first box structure unit and the second box structure unit through the fixing component. Next, grout through the grouting port of the vertical beam of the first box structure unit. The concrete slurry flows from bottom to top through the inner cavity of the grouting pipe into the inner cavity of the vertical beam of the second box structure unit until the concrete slurry flows out from the grouting outlet of the vertical beam of the second box structure unit. Block the grouting inlet and the grouting outlet until the concrete slurry solidifies, and the construction is completed at this time. The designed grouting shear connection joint structure for modular construction, during the descent of the second box structure unit, since the four grouting pipes all pass through the corresponding tapered through holes, the grouting pipes guide the precise fit of the second box structure unit and the L-shaped plate. Then fix the two box structure units through the fixing component, replacing the way of welding and fixing the two box structure units, solving the problem that deviation is likely to occur during the cooperation of the two box structure units, improving the cooperation accuracy of the two box structure units. At the same time, by adopting the grouting reinforcement method, the problem of poor shear resistance between the connection joints of the two box structure units is solved, and the connection performance between the connection joints of the two box structure units is improved.

[0012] Optionally, the cross-sectional area of the limiting block gradually decreases from top to bottom, and the L-shaped plate is provided with a fitting groove for fitting the bottom end of the limiting block.

[0013] By adopting the above technical solution, the designed fitting groove, through the fitting of the limiting block and the fitting groove, and the cross-sectional area of the limiting block gradually decreases from top to bottom, which is convenient for limiting the grouting pipe and improves the connection performance between the grouting pipe and the L-shaped plate.

[0014] Optionally, a through groove for the concrete slurry to flow through is opened inside the grouting pipe, and the through groove is distributed in a space spiral shape.

[0015] By adopting the above technical solution and designing the through groove, when grouting the vertical beam cavity of the first box-type structure unit, a small amount of concrete slurry flows into the vertical beam cavity of the second box-type structure unit through the through groove, and most of the concrete slurry flows into the vertical beam inner cavity of the first box-type structure unit, so as to facilitate uniform grouting of the vertical beam inner cavity of the first box-type structure unit and solve the problem of too little grouting of the vertical beam inner cavity of the first box-type structure unit; at the same time, the through groove is distributed in a spatial spiral shape, which increases the path of the concrete slurry in the grouting pipe and makes the grouting more dense.

[0016] Optionally, the top wall of the L-plate is provided with a first square groove for engaging the bottom end of one of the vertical beams, and the bottom wall of the L-plate is provided with a second square groove for engaging the top end of another of the vertical beams.

[0017] By adopting the above technical solution, the first square groove and the second square groove are designed, and the top of the vertical beam of the first box-type structural unit is embedded in the second square groove, and the top of the vertical beam of the second box-type structural unit is embedded in the first square groove, which facilitates the rapid positioning of the connection nodes of the two box-type structural units and improves the fixing performance of the two box-type structural units.

[0018] Optionally, a gap is left between the bottom end of the guide block and the corner of the inner wall of the vertical beam above the L-plate for concrete slurry to flow through.

[0019] By adopting the above technical solution, the designed gap makes it easy for concrete slurry to flow into the inner cavity of the vertical beam of the second structural unit through the gap, thereby making it easier to reinforce the limit block and the slurry pipe with concrete slurry.

[0020] Optionally, the fixing assembly includes a first bolt and a second bolt, the first bolt passes through the L plate and the corresponding two cross beams, and the second bolt passes through the L plate and the corresponding two longitudinal beams.

[0021] By adopting the above technical solution, a fixing assembly is designed, in which the L-plate and the corresponding two cross beams are fixed by the first bolt, and the L-plate and the corresponding two longitudinal beams are fixed by the second bolt, thereby improving the connection performance of the two box-type structural units.

[0022] Optionally, a first spring is provided on the first bolt, and the first spring is located between the crossbeam and the first bolt.

[0023] By adopting the above technical solution, the first spring is designed. When the first bolt is tightened, the first spring is compressed by the first bolt and the crossbeam, so that the first bolt has a pre-tightening effect, thereby improving the connection performance between the two box-type structural unit crossbeams.

[0024] Optionally, a second spring is provided on the second bolt, and the second spring is located between the longitudinal beam and the second bolt.

[0025] By adopting the above technical solution, the designed second spring, when the second bolt is tightened, the second spring is compressed by the second bolt and the longitudinal beam, so that the second bolt has a pre-tightening effect, improving the connection performance between the longitudinal beams of the two box structure units.

[0026] On the other hand, the present application also discloses a construction method for a grouting shear-resistant connection joint structure of module construction, including the following steps:

[0027] S1. Fix the first box structure unit;

[0028] S2. Install L-shaped plates at the four corners on the top of the first box structure unit respectively;

[0029] S3. Install the grout pipe;

[0030] S4. Lift and adjust the second box structure unit;

[0031] S5. Install the fixing component;

[0032] S6. Grout through the grout inlet;

[0033] S7. Seal the grout inlet and the grout outlet, and the construction is completed.

[0034] By adopting the above technical solution, by setting an L-shaped plate and a connection component at the connection joint of the two box structure units, and realizing grouting of the inner cavity of the vertical beam of the second box structure unit through the grout pipe, the shear resistance performance and the connection performance at the connection joint of the two box structure units are improved.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. A designed grouting shear-resistant connection joint structure of module construction and its construction method. During the process of the second box structure unit descending, since the four grout pipes all pass through the corresponding tapered through holes, the grout pipes guide the second box structure unit to be precisely matched with the L-shaped plate, and then the two box structure units are fixed by the fixing component, replacing the way of welding and fixing the two box structure units, solving the problem that it is easy to generate deviations during the matching process of the two box structure units, and improving the matching accuracy of the two box structure units;

[0037] 2. A designed grouting shear-resistant connection joint structure of module construction and its construction method. By adopting the method of grouting reinforcement, the problem of poor shear resistance between the connection joints of the two box structure units is solved, and the connection performance between the connection joints of the two box structure units is improved;

[0038] 3. A grouting shear-resistant connection joint structure for module construction and its construction method. By arranging a spiral through groove inside the grout pipe, when grouting the vertical beam cavity of the first box structure unit, a small part of the concrete grout flows into the vertical beam cavity of the second box structure unit through the through groove, and most of the concrete grout flows into the inner cavity of the vertical beam of the first box structure unit, facilitating uniform grouting of the inner cavity of the vertical beam of the first box structure unit and solving the problem of insufficient grouting in the inner cavity of the vertical beam of the first box structure unit. At the same time, due to the spatial spiral distribution of the through groove, the path of the concrete grout in the grout pipe is increased, making the grouting more dense. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of the overall structure of a grouting shear-resistant connection joint structure for module construction according to an embodiment of the present application;

[0040] Figure 2 It is a sectional view of a grouting shear-resistant connection joint structure for module construction according to an embodiment of the present application;

[0041] Figure 3 is Figure 2 an enlarged view of part A in

[0042] Figure 4 It is a schematic diagram of the structure of the L-shaped plate, grout pipe and limit block.

[0043] Reference numerals: 1, box structure unit; 11, cross beam; 12, vertical beam; 121, grout inlet; 122, grout outlet; 123, lower plug board; 124, upper plug board; 125, guiding block; 1251, tapered through hole; 13, longitudinal beam; 2, L-shaped plate; 21, first square groove; 22, second square groove; 23, fitting groove; 3, fixing component; 31, first bolt; 32, second bolt; 33, first spring; 34, second spring; 4, grout passing component; 41, grout pipe; 411, through groove; 42, limit block. Detailed Embodiment

[0044] The following will Figures 1-4 further describe the present application in detail with reference to the attached

[0045] In the first aspect, an embodiment of the present application discloses a grouting shear-resistant connection joint structure for module construction.

[0046] Referring to Figure 1 、 Figure 2 and Figure 3, a grouting shear-resistant connection joint structure for module construction includes two box structure units 1, four L-shaped plates 2, fixing components 3 arranged on each L-shaped plate 2, and grout-passing components 4 arranged on each L-shaped plate 2. Each box structure unit 1 includes four cross beams 11, four vertical beams 12, and four longitudinal beams 13. One cross beam 11, one longitudinal beam 13, and one vertical beam 12 are welded together to form a spatial right-angle structure, and the cross beam 11, vertical beam 12, and longitudinal beam 13 are all rectangular tube structures. The inner cavities of the cross beam 11, vertical beam 12, and longitudinal beam 13 are not interconnected. The four L-shaped plates 2 are respectively arranged at the four corners of the connection joint of the two box structure units 1, and each L-shaped plate 2 is located between the two box structure units 1. The bottom end of the vertical beam 12 of one box structure unit 1 abuts against the top wall of the L-shaped plate 2, and the top end of the vertical beam 12 of the other box structure unit 1 abuts against the bottom wall of the L-shaped plate 2. The top wall of the L-shaped plate 2 is provided with a first square groove 21 for the bottom end of one vertical beam 12 to fit into, and the bottom wall of the L-shaped plate 2 is provided with a second square groove 22 for the top end of the other vertical beam 12 to fit into; a grout inlet 121 is opened on the side wall of the vertical beam 12 below the L-shaped plate 2, and a lower plug plate 123 is welded in the inner cavity of the vertical beam 12, and the lower plug plate 123 is located below the grout inlet 121. An outlet 122 is opened on the side wall of the vertical beam 12 above the L-shaped plate 2, and an upper plug plate 124 is welded in the inner cavity of the vertical beam 12, and the upper plug plate 124 is located above the outlet 122; the grout-passing component 4 is used to pass the concrete grout in the vertical beam 12 below the L-shaped plate 2 into the inner cavity of the vertical beam 12 above the L-shaped plate 2; the fixing component 3 is used to fixedly connect the two box structure units 1.

[0047] First, fix one box structure unit 1, then install the L-shaped plate 2 on the top wall of the vertical beam 12 of the fixed box structure unit 1, so that the top end of the vertical beam 12 of the first box structure unit 1 fits into the second square groove 22. Then install the grout-passing component 4 on the L-shaped plate 2, and then hoist the second box structure unit 1, so that the bottom end of the vertical beam 12 of the second box structure unit 1 abuts against the L-shaped plate 2. During the lowering process of the second box structure unit 1, the grout-passing component 4 extends into the inner cavity of the vertical beam 12 of the second box structure unit 1 until the bottom end of the vertical beam 12 of the second box structure unit 1 abuts against the top wall of the L-shaped plate 2. Then, fix the connection joint of the first box structure unit 1 and the second box structure unit 1 through the fixing component 3. Then, grout through the grout inlet 121 of the vertical beam 12 of the first box structure unit 1. The concrete grout flows from bottom to top through the inner cavity of the grout-passing pipe 41 into the inner cavity of the vertical beam 12 of the second box structure unit 1 until the concrete grout flows out from the outlet 122 of the vertical beam 12 of the second box structure unit 1. Block the grout inlet 121 and the outlet 122 until the concrete grout solidifies, and the construction is completed at this time.

[0048] Refer to Figure 2 , Figure 3 andFigure 4 The grouting component 4 includes a grouting pipe 41 and a limiting block 42 sleeved on the grouting pipe 41. The grouting pipe 41 vertically penetrates through the L-shaped plate 2 and is slidably connected to the L-shaped plate 2. In this application, the grouting pipe 41 can be a square pipe or a round pipe. As long as the concrete slurry in the inner cavity of the vertical beam 12 below the L-shaped plate 2 can be introduced into the inner cavity of the vertical beam 12 above the L-shaped plate 2, in this embodiment, the grouting pipe 41 is a round pipe. One end of the grouting pipe 41 extends into the inner cavity of the vertical beam 12 of a box structure unit 1, and the other end extends into the inner cavity of the vertical beam 12 of another box structure unit 1. A through groove 411 for the concrete slurry to flow through is formed inside the grouting pipe 41, and the through groove 411 is distributed in a spatial spiral shape. In this embodiment, the limiting block 42 is in the shape of an inverted frustum. The limiting block 42 is coaxially welded to the grouting pipe 41. The bottom wall of the limiting block 42 abuts against the top wall of the L-shaped plate 2. The area of the cross-section of the limiting block 42 gradually decreases from top to bottom. An engaging groove 23 for engaging the bottom end of the limiting block 42 is formed on the L-shaped plate 2. A guiding block 125 is spot-welded to the inner cavity of the vertical beam 12 above the L-shaped plate 2. A tapered through hole 1251 for the grouting pipe 41 to pass through is formed on the guiding block 125. The cross-section of the tapered through hole 1251 gradually increases from top to bottom. The guiding block 125 is in the shape of a regular frustum. The large end of the guiding block 125 is tangent to the inner wall of the vertical beam 12. A gap for the concrete slurry to flow through is left between the bottom end of the guiding block 125 and the inner side wall corner of the vertical beam 12 above the L-shaped plate 2.

[0049] Refer to Figure 2 and Figure 3 As shown in FIGS. and, the fixing component 3 includes a first bolt 31 and a second bolt 32. In this embodiment, the numbers of the first bolt 31 and the second bolt 32 are two respectively. In this application, the numbers of the first bolt 31 and the second bolt 32 are not limited to two each. As long as two corresponding cross beams 11 can be fixed and two corresponding longitudinal beams 13 can be fixed, both of the two first bolts 31 pass through the L-shaped plate 2 and the corresponding two cross beams 11. The first bolt 31 is threadedly connected to the L-shaped plate 2 and is slidably connected to the cross beam 11. The second bolt 32 passes through the L-shaped plate 2 and the corresponding two longitudinal beams 13. The second bolt 32 is threadedly connected to the L-shaped plate 2 and is slidably connected to the longitudinal beam 13. In order to facilitate improving the connection performance of the first bolt 31, a first spring 33 is coaxially sleeved on the first bolt 31 in this embodiment. The first spring 33 is located between the cross beam 11 and the first bolt 31. One end of the first spring 33 abuts against the top wall of the nut of the first bolt 31, and the other end abuts against the bottom wall of the cross beam 11 below the L-shaped plate 2. In order to facilitate improving the connection performance of the second bolt 32, a second spring 34 is coaxially sleeved on the second bolt 32 in this embodiment. The second spring 34 is located between the longitudinal beam 13 and the second bolt 32. One end of the second spring 34 abuts against the top wall of the nut of the second bolt 32, and the other end abuts against the bottom wall of the longitudinal beam 13 below the L-shaped plate 2.

[0050] The implementation principle of a grouting shear-resistant connection joint structure for module construction in an embodiment of the present application is as follows: First, fix a box-type structural unit 1, then install the L-shaped plate 2 on the top wall of the vertical beam 12 of the fixed box-type structural unit 1, so that the top end of the vertical beam 12 of the first box-type structural unit 1 is fitted into the second square groove 22. Then, pass the grouting pipe 41 through the L-shaped plate 2 and extend it into the inner cavity of the vertical beam 12, and make the limit block 42 abut against the top wall of the L-shaped plate 2, and the bottom end of the limit block 42 is fitted into the fitting groove 23. Then, fix the grouting pipe 41 and the limit block 42. Next, hoist the second box-type structural unit 1 so that the bottom end of the vertical beam 12 of the second box-type structural unit 1 abuts against the L-shaped plate 2. During the descent of the second box-type structural unit 1, the grouting pipe 41 extends into the inner cavity of the vertical beam 12 of the second box-type structural unit 1 and passes through the tapered through-hole 1251 on the guiding block 125 until the bottom end of the vertical beam 12 of the second box-type structural unit 1 is fitted into the first square groove 21 on the top wall of the L-shaped plate 2. Then, fix the two cross beams 11 with the first bolt 31 and fix the two longitudinal beams 13 with the second bolt 32 to fix the connection joint between the first box-type structural unit 1 and the second box-type structural unit 1. Then, grout through the grouting port 121 of the vertical beam 12 of the first box-type structural unit 1. The concrete slurry flows from bottom to top into the inner cavity of the vertical beam 12 of the second box-type structural unit 1 through the through-groove 411 of the grouting pipe 41 until the concrete slurry flows out from the grouting outlet 122 of the vertical beam 12 of the second box-type structural unit 1. Seal the grouting port 121 and the grouting outlet 122 until the concrete slurry solidifies, and the construction is completed at this time.

[0051] On the other hand, an embodiment of the present application discloses a construction method for a grouting shear-resistant connection joint structure for module construction, including the following steps:

[0052] S1. Fix the first box-type structural unit 1;

[0053] S2. Install the L-shaped plates 2 at the four corners on the top of the first box-type structural unit 1 respectively;

[0054] S21. Fit the top end of the vertical beam 12 of the first box-type structural unit 1 into the second square groove 22, and at the same time, the bottom wall of the L-shaped plate 2 abuts against the top walls of the cross beam 11 and the longitudinal beam 13 of the first box-type structural unit 1;

[0055] S22. Fix the L-shaped plate 2 by spot welding on the side walls of the L-shaped plate 2 and the vertical beam 12;

[0056] S3. Install the grouting pipe 41;

[0057] S31. Pass the grouting pipe 41 through the L-shaped plate 2 and extend it into the inner cavity of the vertical beam 12 of the first box-type structural unit 1 until the bottom end of the limit block 42 is fitted into the fitting groove 23;

[0058] S32. Weld and fix the connection between the limit block 42 and the L-shaped plate 2.

[0059] S4. Lift and adjust the second box structure unit 1.

[0060] S41. When the second box structure unit 1 descends, make the four grout pipes 41 pass through the tapered through holes 1251 of the four guide blocks 125 respectively, so as to guide the descent of the second box structure unit 1.

[0061] S42. Fit the bottom end of the vertical beam 12 of the second box structure unit 1 into the first square groove 21 on the L-shaped plate 2.

[0062] S5. Install the fixing component 3.

[0063] S51. Fix the L-shaped plate 2 and the two corresponding cross beams 11 through the first bolt 31 and the first spring 33.

[0064] S52. Fix the L-shaped plate 2 and the two corresponding longitudinal beams 13 through the second bolt 32 and the second spring 34.

[0065] S6. Grout through the grout inlet 121.

[0066] S61. Grout the vertical beam 12 through a pressure pump, so that the concrete slurry flows into the inner cavity of the vertical beam 12 of the first box structure unit 1 through the grout inlet 121 on the vertical beam 12 of the first box structure unit 1.

[0067] S62. At the same time, a part of the concrete slurry flows into the inner cavity of the vertical beam 12 of the second box structure unit 1 through the through groove 411 of the grout pipe 41 until the concrete slurry flows out from the grout outlet 122 on the vertical beam 12 of the second box structure unit 1.

[0068] S7. Seal the grout inlet 121 and the grout outlet 122, and the construction is completed.

[0069] During the descent of the second box structure unit 1, since the four grout pipes 41 all pass through the corresponding tapered through holes 1251, the grout pipes 41 guide the second box structure unit 1 to be precisely matched with the L-shaped plate 2, and then the two box structure units 1 are fixed by the fixing component 3, replacing the welding and fixing method of the two box structure units 1, solving the problem that deviation is likely to occur during the matching process of the two box structure units 1, improving the matching accuracy of the two box structure units 1. At the same time, by adopting the grouting reinforcement method, the problem of poor shear resistance between the connection nodes of the two box structure units 1 is solved, and the connection performance between the connection nodes of the two box structure units 1 is improved.

[0070] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A grouting shear-resistant connection joint structure for module construction, comprising two box-type structural units (1), each of the box-type structural units (1) including four cross beams (11), four vertical beams (12) and four longitudinal beams (13), one cross beam (11), one longitudinal beam (13) and one vertical beam (12) being fixedly connected together to form a spatial right-angle structure, characterized in that: It further includes four L-shaped plates (2), a fixing component (3) provided on each of the L-shaped plates (2), and a grout passing component (4) provided on each of the L-shaped plates (2); The four L-shaped plates (2) are respectively arranged at the four corners of the connection node of the two box-shaped structural units (1), and each L-shaped plate (2) is located between the two box-shaped structural units (1). The bottom end of the vertical beam (12) of one box-shaped structural unit (1) abuts against the top wall of the L-shaped plate (2), and the top end of the vertical beam (12) of the other box-shaped structural unit (1) abuts against the bottom wall of the L-shaped plate (2). A grout inlet (121) is formed on the side wall of the vertical beam (12) below the L-shaped plate (2), and a lower plug plate (123) is arranged in the inner cavity of the vertical beam (12). The lower plug plate (123) is located below the grout inlet (121). An outlet (122) is formed on the side wall of the vertical beam (12) above the L-shaped plate (2), and an upper plug plate (124) is arranged in the inner cavity of the vertical beam (12). The upper plug plate (124) is located above the outlet (122). The grout passing component (4) is used to pass the concrete grout in the vertical beam (12) below the L-shaped plate (2) into the inner cavity of the vertical beam (12) above the L-shaped plate (2); The grout passing component (4) includes a grout passing pipe (41) and a limiting block (42) sleeved on the grout passing pipe (41). The grout passing pipe (41) vertically penetrates the L-shaped plate (2) and is slidably connected to the L-shaped plate (2). One end of the grout passing pipe (41) extends into the inner cavity of the vertical beam (12) of one box-shaped structural unit (1), and the other end extends into the inner cavity of the vertical beam (12) of the other box-shaped structural unit (1). The limiting block (42) is fixedly connected to the grout passing pipe (41), and the bottom wall of the limiting block (42) abuts against the top wall of the L-shaped plate (2). A guiding block (125) is arranged in the inner cavity of the vertical beam (12) above the L-shaped plate (2). A tapered through hole (1251) for the grout passing pipe (41) to pass through is formed on the guiding block (125), and the cross-section of the tapered through hole (1251) gradually increases from top to bottom; The fixing component (3) is used to fixedly connect the two box-shaped structural units (1).

2. The grouting shear-resistant connection joint structure for modular construction according to claim 1, characterized in that: The cross-sectional area of the limiting block (42) gradually decreases from top to bottom, and a fitting groove (23) for fitting the bottom end of the limiting block (42) is formed on the L-shaped plate (2).

3. A grouting shear-resistant connection joint structure for module construction according to claim 1, characterized in that: A through groove (411) for the concrete grout to flow through is formed inside the grout passing pipe (41), and the through groove (411) is distributed in a space spiral shape.

4. A grouting shear-resistant connection joint structure for module construction according to claim 1, characterized in that: A first square groove (21) for fitting the bottom end of one vertical beam (12) is formed on the top wall of the L-shaped plate (2), and a second square groove (22) for fitting the top end of the other vertical beam (12) is formed on the bottom wall of the L-shaped plate (2).

5. A grouting shear-resistant connection joint structure for module construction according to claim 1, characterized in that: A gap for the concrete grout to flow through is left between the bottom end of the guiding block (125) and the inner side wall corner of the vertical beam (12) above the L-shaped plate (2).

6. The grouting shear-resistant connection joint structure for module construction according to claim 1, wherein: The fixing component (3) includes a first bolt (31) and a second bolt (32). The first bolt (31) passes through the L-shaped plate (2) and the corresponding two cross beams (11), and the second bolt (32) passes through the L-shaped plate (2) and the corresponding two longitudinal beams (13).

7. A grouting shear-resistant connection joint structure for module construction according to claim 6, characterized in that: A first spring (33) is arranged on the first bolt (31), and the first spring (33) is located between the cross beam (11) and the first bolt (31).

8. The grouting shear-resistant connection joint structure for module construction according to claim 6, characterized in that: A second spring (34) is arranged on the second bolt (32), and the second spring (34) is located between the longitudinal beam (13) and the second bolt (32).

9. The construction method of a grouting shear-resistant connection joint structure for modular construction according to any one of claims 1-8, characterized in that: It includes the following steps: S1. Fix the first box structure unit (1); S2. Install L-shaped plates (2) at the four corners above the first box structure unit (1) respectively; S3. Install the grouting pipe (41); S4. Lift and adjust the second box structure unit (1); S5. Install the fixing component (3); S6. Inject grout through the grout inlet (121); S7. Seal the grout inlet (121) and the grout outlet (122), and the construction is completed.

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