Construction method for cross-shaped connection node between concrete modular composite slab and wall

Abstract

The present invention provides a construction method for a cross-shaped connection node between a concrete modular laminated slab and a wall, which relates to the field of building structures. The cross-shaped connection node between the concrete modular laminated slab and the wall includes: two precast grooved bottom plates, on one side of which they are spliced with each other, a number of horizontal notches are arranged at intervals in the front and rear; a first connector is connected in the corresponding horizontal notches of the two precast grooved bottom plates; an upper double-skin wall is arranged directly above the area between the two precast grooved bottom plates, and a lower double-skin wall is arranged directly below the area between the two precast grooved bottom plates; a second connector is arranged between the upper double-skin wall and the lower double-skin wall; the lower part of the third connector is pre-buried into the lower double-skin wall, and the upper part of the third connector is used to insert into the upper double-skin wall; through cast-in-place concrete, the upper double-skin wall, the lower double-skin wall, the second connector, the third connector, the two precast grooved bottom plates, and the first connector form a connection integral body with a cast-in-place top plate. The present invention is convenient for module production, transportation, installation and splicing, and can improve the integrity and safety of the modular building, shorten the construction process and improve the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and specifically to a construction method for a cross-shaped connection node between a concrete modular composite slab and a wall. Background Technique

[0002] At present, the reinforced concrete floor slabs used in China include cast-in-place floor slabs and precast floor slabs. The cast-in-place floor slab has good integrity, but it requires on-site formwork support and then concrete pouring, with a long construction period, high construction difficulty, large formwork loss, and high cost. The precast floor slab does not require on-site formwork support, has a short construction period, and low cost. The composite slab is a better structural form combining precast and cast-in-place concrete.

[0003] In the prior art, the composite slab usually has extended steel bars (such as a reinforced concrete composite slab for a modular building in CN218522059U) for connection with walls, etc. The setting of the extended steel bars affects the convenience of handling. Summary of the Invention

[0004] The present invention provides a construction method for a cross-shaped connection node between a concrete modular composite slab and a wall to solve the technical problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention discloses a cross-shaped connection node between a concrete modular composite slab and a wall, including:

[0006] A grooved composite slab, including two precast grooved bottom plates and a cast-in-place top plate. The two precast grooved bottom plates are spliced at a certain distance left and right. A number of horizontal notches are arranged at intervals before and after on one side where the two precast grooved bottom plates are spliced with each other, and a connecting piece one is connected in the corresponding horizontal notches of the two precast grooved bottom plates;

[0007] An upper double-skin wall and a lower double-skin wall. An upper double-skin wall is arranged directly above the area between the two precast grooved bottom plates at the upper end of the grooved composite slab, and a lower double-skin wall is arranged directly below the area between the two precast grooved bottom plates at the lower end of the grooved composite slab; A connecting piece two is arranged between the upper double-skin wall and the lower double-skin wall; The lower part of the connecting piece three is pre-buried into the lower double-skin wall, and the upper part of the connecting piece three is used for inserting into the upper double-skin wall;

[0008] A steel bar structure one is arranged in the precast grooved bottom plate. The steel bar structure one includes: a number of transverse steel bars one arranged at intervals left and right, and a number of longitudinal steel bars one arranged at intervals before and after are arranged below the number of transverse steel bars one; The longitudinal direction is the left-right direction, and the transverse direction is the front-back direction; The longitudinal steel bars one are disconnected at the connection of the two precast grooved bottom plates; The arrangement position of the horizontal notches in the front-back direction of the horizontal plane is staggered from the longitudinal steel bars one;

[0009] A steel bar structure two is arranged in the cast-in-place roof slab. The steel bar structure two includes: a number of transverse steel bars two arranged at intervals left and right, and a number of longitudinal steel bars two arranged at intervals front and back are arranged above the number of transverse steel bars two; the longitudinal steel bars two are continuous at the connection of two precast grooved bottom plates without interruption.

[0010] Through cast-in-place concrete, the upper double-skin wall, the lower double-skin wall, the connecting piece two, the connecting piece three, the two precast grooved bottom plates, and the connecting piece one form a connected whole with a cast-in-place roof slab.

[0011] Preferably, the connecting piece one is a lapped steel bar one.

[0012] Preferably, a total of 4 horizontal notches are arranged on one side of the precast grooved bottom plate, and the front-back spacing of the horizontal notches is 100 mm.

[0013] Both the transverse steel bar one and the longitudinal steel bar one adopt HRB400 with a diameter of 8 mm as the stress-bearing steel bars. The front-back spacing of the adjacent longitudinal steel bars one in the front-back direction in a single precast grooved bottom plate is 150 mm; the left-right spacing of the adjacent transverse steel bars one at non-horizontal-notch positions in a single precast grooved bottom plate is 150 mm, and the left-right spacing of the adjacent transverse steel bars one at the horizontal-notch positions in a single precast grooved bottom plate is shortened to 112 mm.

[0014] The lapped steel bar one is pre-buried on the adjacent spliced precast grooved bottom plates. The length of the lapped steel bar one entering the horizontal notch is the anchorage length, and the anchorage length is 40d, where d is the diameter of the lapped steel bar one.

[0015] Both the transverse steel bar two and the longitudinal steel bar two adopt HRB400 with a diameter of 12 mm as the stress-bearing steel bars.

[0016] The horizontal notch is located at the 1 / 2 of the area between adjacent longitudinal steel bars one in the front-back direction. The depth h of the horizontal notch is 40 mm, the width a is 40 mm, and the length n is 340 mm.

[0017] Preferably, the upper double-skin wall includes two upper precast walls arranged at intervals left and right, the lower double-skin wall includes two lower precast walls arranged at intervals left and right. A number of vertical steel bars are arranged at intervals front and back on both the upper precast wall and the lower precast wall. Lap joint steel bars two are connected between the adjacent vertical steel bars on the left and right of the two upper precast walls, and lap joint steel bars two are also connected between the adjacent vertical steel bars on the left and right of the two lower precast walls.

[0018] The connecting piece two is a ring-shaped inserted bar. The upper part of the ring-shaped inserted bar is located between the two upper precast walls, and the lower part of the ring-shaped inserted bar is located between the two lower precast walls; a mortar layer is arranged at the upper end of the cast-in-place roof slab.

[0019] A notch one is arranged between the adjacent vertical steel bars at the lower part inside the upper double-skin wall; the ring-shaped inserted bar is located between the adjacent lap joint steel bars two.

[0020] The third connecting piece is an inverted U-shaped inserted bar. The notches one of the two adjacent upper precast walls on the left and right are grouped as a set of notches. The set of notches corresponds to the inverted U-shaped inserted bar one by one. The lower part of the inverted U-shaped inserted bar is pre-buried into the lower double-skin wall in advance, and the upper part of the inverted U-shaped inserted bar is used to be inserted into the notch one.

[0021] Preferably, the diameter of the vertical steel bar is 12 mm, the spacing in the front and back direction between the adjacent vertical steel bar groups in the front and back is 100 mm, the diameter of the second overlapping steel bar is 12 mm, and the spacing in the front and back direction between the adjacent second overlapping steel bars in the front and back is 100 mm;

[0022] The annular inserted bar is vertically arranged throughout the upper double-skin wall and the lower double-skin wall. The width of the annular inserted bar is 75 mm. The annular inserted bar is located at the midpoint in the front and back direction of the adjacent second overlapping steel bars 212 in the front and back; The size of the notch one is: height 305 mm, width 30 mm, length 30 mm.

[0023] The present invention also discloses a construction method for a cross-shaped connection node between a concrete modularized laminated slab and a wall, including:

[0024] Step S1: Fabricate the lower double-skin wall; the specific fabrication process is: first bind the vertical steel bars of the lower precast wall and the second overlapping steel bars between the two lower precast walls, and bury the inverted U-shaped inserted bar and the annular inserted bar, and then pour one of the lower precast walls, and pour the other lower precast wall after it hardens;

[0025] Step S2: Fabricate the upper double-skin wall; the specific fabrication process is: first bind the vertical steel bars of the upper precast wall and the second overlapping steel bars between the two upper precast walls, and then pour one of the upper precast walls, and pour the other upper precast wall after it hardens. The upper double-skin wall is provided with notches one.

[0026] Step S3: Fabricate two precast grooved bottom plates; the specific fabrication process of the precast grooved bottom plates is: bind the first steel bar structure of the precast grooved bottom plates, and then pour concrete to form the precast grooved bottom plates;

[0027] Step S4: Assemble the two lower precast walls and the two precast grooved bottom plates on the formwork, and place the first overlapping steel bars in the horizontal notches;

[0028] Step S5: After the installation in Step S4 is completed, pour the concrete cast-in-place part of the lower double-skin wall, the precast grooved bottom plates and the cast-in-place top plate to form the cast-in-place top plate;

[0029] Step S6: After the concrete poured in Step S5 hardens, install the upper double-skin wall. The set of notches of the upper double-skin wall is installed corresponding to the inverted U-shaped inserted bars of the lower double-skin wall one by one, and then pour the concrete cast-in-place part in the upper double-skin wall;

[0030] Step S7: Finally, pour a two-centimeter mortar layer.

[0031] Preferably, steps S1, S2, S3, S5, and S6 are all executed based on a concrete pouring device. The concrete pouring device includes a mixing device and a concrete conveying device. The discharge port of the mixing device is communicated with the feed port of the concrete conveying device. After screening the aggregates for preparing concrete, the mixing device mixes and stirs the raw materials for preparing concrete. The mixing device includes:

[0032] A housing. In the middle of the upper end of the housing, a cylindrical shell is fixedly installed. A motor is fixedly installed inside the cylindrical shell. The output shaft of the motor is arranged vertically downward. The lower end of the output shaft of the motor is fixedly connected to a vertical lead screw. The lower end of the vertical lead screw is fixedly connected to a vertical electric telescopic rod. The fixed part of the vertical electric telescopic rod is rotatably connected to the upper end of the housing. The telescopic part of the vertical electric telescopic rod is located inside the housing and is connected with a blade. A sealing block is fixedly arranged at the lower end of the telescopic part of the vertical electric telescopic rod. The periphery of the sealing block is in sealing contact with the periphery of the inner wall of the discharge port at the lower end of the housing. An inner sleeve is threadedly sleeved on the vertical lead screw. An outer sleeve is sleeved in the middle of the outer part of the inner sleeve. A hopper communicated with the first discharge port is arranged at the lower end of the housing. The third discharge port of the hopper is communicated with the feed port of the concrete conveying device.

[0033] A number of groups of multi-functional filtering devices. The number of groups of multi-functional filtering devices are evenly spaced along the circumferential direction of the cylindrical shell. The multi-functional filtering device includes: a feed pipe. The lower part of the feed pipe is fixedly penetrated through the upper end of the housing. A horizontal filter screen is arranged inside the feed pipe. A second discharge port is arranged on one side of the feed pipe. A first horizontal rod slides through the side wall of the cylindrical shell along the radial direction of the cylindrical shell. One end of a first connecting rod is hinged to the end of the first horizontal rod located inside the cylindrical shell. The other end of the first connecting rod is hinged to the corresponding side wall of the outer sleeve. A collection box is arranged on one side of the feed pipe. The feed port of the collection box is communicated with the second discharge port. A push block is arranged at the other end of the first horizontal rod. The push block penetrates through the corresponding side wall of the feed pipe. The push block is used to push the aggregates at the upper end of the horizontal filter screen to the second discharge port.

[0034] Preferably, the multi-functional filtering device further includes: a number of fixing blocks. The number of fixing blocks are arranged at intervals on the inner side wall of the feed pipe. A first spring is connected between the fixing blocks and the lower end of the horizontal filter screen. A protrusion is arranged on the first side at the lower end of the horizontal filter screen. The side of the horizontal filter screen close to the cylindrical shell along the radial direction of the cylindrical shell is the first side. The side of the horizontal filter screen far from the cylindrical shell along the radial direction of the cylindrical shell is the second side. An inclined surface is arranged on the first side of the protrusion. The height of the first side of the inclined surface is higher than the height of the second side of the inclined surface. A second horizontal rod is arranged parallel to the first horizontal rod. The second horizontal rod penetrates through the side wall of the first side of the feed pipe. The second side of the second horizontal rod is in contact with the inclined surface. The first side of the second horizontal rod is connected to the first horizontal rod through a second connecting rod.

[0035] The mixing device further includes a vibration device, which includes: a third horizontal rod that penetrates the left side wall of the hopper along the left-right direction. A cone is integrally fixed at the lower end of the sealing block. A conical surface is provided at the lower part of the cone. The distance between the left and right sides of the upper part of the conical surface is greater than the distance between the left and right sides of the lower part of the conical surface. The left side of the third horizontal rod is connected to a first collision ball through a third connecting rod. The right side of the third horizontal rod is connected to a second collision ball. A fixed plate is fixedly provided at the left part of the lower end of the outer shell. A second spring is connected between the fixed plate and the third connecting rod.

[0036] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. A modular prefabricated grooved bottom plate with a horizontal notch (strip-shaped notch) is provided, eliminating the extended steel bars of the laminated slab (specifically, the prefabricated grooved bottom plate) in the cast-in-place area of the joint. Instead, a horizontal notch is opened at the end of the prefabricated grooved bottom plate and lap steel bars are set. The structure is simple, the construction is easy, the connection is reliable, which is convenient for module production, transportation, installation and splicing, and can effectively improve the integrity and safety of the modular building, shorten the construction process and improve the construction efficiency.

[0039] 2. The precast walls on both sides and the cast-in-place layer form a double-skin wall connected to the grooved laminated slab. The double-skin wall is stressed through the longitudinal steel bars in the precast formwork, reducing the binding of the steel reinforcement cage. The force transmission and stress mechanism of the structure are clear, and the coordinated stress of the formwork and the cast-in-place layer can be realized, having good seismic performance.

[0040] Compared with the traditional concrete modular joint, the grooved laminated slab-wall cross-shaped joint realizes the coordinated stress of the formwork and the cast-in-place layer. The steel consumption in module production is less than that of the traditional joint, and the wall thickness is reduced, which can greatly reduce the overall self-weight of the building, increase the internal space, reduce material waste and a large amount of on-site work. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0042] Figure 1 is the front view of the overall connection joint of the present invention;

[0043] Figure 2 is the top view of the prefabricated grooved bottom plate of the present invention;

[0044] Figure 3 is the structural schematic diagram of the horizontal notch of the prefabricated grooved bottom plate of the present invention;

[0045] Figure 4 is the top view of the upper double-skin wall of the present invention;

[0046] Figure 5 This is the front view of the upper double-skin wall of the present invention;

[0047] Figure 6 This is the top view of the lower double-skin wall of the present invention;

[0048] Figure 7 This is the front view of the lower double-skin wall of the present invention;

[0049] Figure 8 This is the schematic three-dimensional structure diagram of the mixing device of the present invention;

[0050] Figure 9 This is the cross-sectional view of the mixing device of the present invention;

[0051] Figure 10 is Figure 9 the enlarged structure diagram of area A in

[0052] Figure 11 is Figure 9 the enlarged structure diagram of area B in

[0053] In the figure: 1, grooved laminated slab; 11, precast grooved bottom slab; 12, horizontal notch; 13, cast-in-place top slab; 14, steel bar structure one; 141, transverse steel bar one; 142, longitudinal steel bar one; 15, steel bar structure two; 151, transverse steel bar two; 152, longitudinal steel bar two; 2, upper double-skin wall; 21, upper precast wall; 211, vertical steel bar; 212, lapping steel bar two; 213, notch one; 214, inverted U-shaped inserted bar; 3, lower double-skin wall; 31, lower precast wall; 4, annular inserted bar; 5, lapping steel bar one; 6, mortar bedding layer; 7, mixing device; 71, outer shell; 72, cylindrical shell; 73, motor; 74, vertical lead screw; 75, vertical electric telescopic rod; 751, fixed part of the vertical electric telescopic rod; 752, telescopic part of the vertical electric telescopic rod; 76, blade; 77, inner sleeve; 78, outer sleeve; 79, discharge port one; 710, feed pipe; 711, discharge port two; 712, horizontal rod one; 713, connecting rod one; 714, collection box; 715, pushing block; 716, fixed block; 717, spring one; 718, protrusion; 7181, inclined surface; 719, connecting rod two; 720, horizontal rod two; 721, sealing block; 722, hopper; 723, horizontal filter screen; 8, vibration device; 81, horizontal rod three; 82, cone; 83, conical surface; 84, collision ball one; 85, collision ball two; 86, spring two; 87, connecting rod three; 9, fixing plate; 10, fixing bracket. Detailed implementation manners

[0054] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0055] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The present invention provides the following embodiments

[0057] Embodiment 1. The embodiment of the present invention provides a cross-shaped connection node between a concrete modular composite slab and a wall, as Figures 1-7 shown, including:

[0058] A slotted composite slab 1, including two precast slotted bottom plates 11 and a cast-in-place top plate 13. The two precast slotted bottom plates 11 are spliced at a certain distance left and right. A plurality of horizontal notches 12 are arranged at intervals before and after on one side where the two precast slotted bottom plates 11 are spliced with each other. A first connector is connected in the corresponding horizontal notches 12 of the two precast slotted bottom plates 11;

[0059] An upper double-skin wall 2 and a lower double-skin wall 3. An upper double-skin wall 2 is arranged directly above the area between the two precast slotted bottom plates 11 at the upper end of the slotted composite slab 1, and a lower double-skin wall 3 is arranged directly below the area between the two precast slotted bottom plates 11 at the lower end of the slotted composite slab 1; A second connector is arranged between the upper double-skin wall 2 and the lower double-skin wall 3; The lower part of the third connector is pre-buried into the lower double-skin wall 3, and the upper part of the third connector is used to insert into the upper double-skin wall 2;

[0060] A steel bar structure 14 is arranged in the precast slotted bottom plate 11. The steel bar structure 14 includes: a plurality of transverse steel bars 141 arranged at intervals left and right, and a plurality of longitudinal steel bars 142 arranged at intervals before and after are arranged below the plurality of transverse steel bars 141; The longitudinal direction is the left-right direction, and the transverse direction is the front-back direction; The longitudinal steel bars 142 are disconnected at the connection of the two precast slotted bottom plates 11; The arrangement position of the horizontal notch 12 in the front-back direction of the horizontal plane is staggered from the longitudinal steel bars 142;

[0061] A steel bar structure two 15 is arranged in the cast-in-place roof slab 13. The steel bar structure two 15 includes: a number of transverse steel bars two 151 arranged at intervals left and right, and a number of longitudinal steel bars two 152 arranged at intervals front and back are arranged above the number of transverse steel bars two 151; the longitudinal steel bars two 152 are continuous at the connection of the two precast grooved bottom plates 11 and do not break.

[0062] Through cast-in-place concrete, the upper double-skin wall 2, the lower double-skin wall 3, the connecting piece two, the connecting piece three, the two precast grooved bottom plates 11, and the connecting piece one form a connected whole with a cast-in-place roof slab 13.

[0063] Specifically, the connecting piece one is the lapping steel bar one 5. Particularly, the lapping steel bar one 5 can shorten the anchorage length by using a steel bar loop or increasing the steel bar diameter, thereby reducing the notch length.

[0064] Specifically, a total of 4 horizontal notches 12 are arranged on one side of the precast grooved bottom plate 11, and the front-back spacing of the horizontal notches 12 is 100 mm.

[0065] Both the transverse steel bar one 141 and the longitudinal steel bar one 142 use HRB400 with a diameter of 8 mm as the stress-bearing steel bars. The front-back spacing of the adjacent longitudinal steel bars one 142 in the front-back direction in a single precast grooved bottom plate 11 is 150 mm; the left-right spacing of the adjacent transverse steel bars one 141 at the non-horizontal notch 12 in a single precast grooved bottom plate 11 is 150 mm, and the left-right spacing of the adjacent transverse steel bars one 141 at the horizontal notch 12 in a single precast grooved bottom plate 11 is shortened to 112 mm.

[0066] The lapping steel bar one 5 is pre-buried on the adjacent spliced precast grooved bottom plates 11, and the length of the lapping steel bar one 5 buried into the horizontal notch 12 is the anchorage length, and the anchorage length is 40d, where d is the diameter of the lapping steel bar one 5.

[0067] Both the transverse steel bar two 151 and the longitudinal steel bar two 152 use HRB400 with a diameter of 12 mm as the stress-bearing steel bars.

[0068] The horizontal notch 12 is located at the 1 / 2 of the front-back direction in the area between the adjacent longitudinal steel bars one 142. The depth h of the horizontal notch 12 is 40 mm, the width a is 40 mm, and the length n is 340 mm; the size of the horizontal notch 12 can be adjusted according to the actual situation.

[0069] Specifically, the upper double - skin wall 2 includes two upper precast walls 21 arranged at intervals left and right. The lower double - skin wall 3 includes two lower precast walls 31 arranged at intervals left and right. A number of vertical steel bars 211 (load - bearing steel bars) are arranged at intervals front and back in both the upper precast wall 21 and the lower precast wall 31. Lap joint steel bars two 212 are connected between the vertically adjacent vertical steel bars 211 of the two adjacent upper precast walls 21 left and right, and lap joint steel bars two 212 are also connected between the vertically adjacent vertical steel bars 211 of the two adjacent lower precast walls 31 left and right. The areas between the two upper precast walls 21 and between the two lower precast walls 31 are joint - cast areas)

[0070] The connecting piece two is a ring - shaped inserted bar 4. The upper part of the ring - shaped inserted bar 4 is located between the two upper precast walls 21, and the lower part of the ring - shaped inserted bar 4 is located between the two lower precast walls 31. A mortar layer 6 is arranged at the upper end of the cast - in - place roof slab 13;

[0071] A notch one 213 is arranged between the vertically adjacent vertical steel bars 211 at the lower part inside the upper double - skin wall 2. The ring - shaped inserted bar 4 is located between the adjacent lap joint steel bars two 212 front and back;

[0072] The connecting piece three is an inverted U - shaped inserted bar 214. The notches one 213 adjacent left and right of the two upper precast walls 21 form a group of notches. The group of notches corresponds one - to - one with the inverted U - shaped inserted bar 214. The lower part of the inverted U - shaped inserted bar 214 is pre - buried into the lower double - skin wall 3 in advance, and the upper part of the inverted U - shaped inserted bar 214 is used to be inserted into the notch one 213.

[0073] Specifically, the diameter of the vertical steel bar 211 is 12 mm, the distance in the front - back direction between the vertically adjacent groups of vertical steel bars is 100 mm, the diameter of the lap joint steel bar two 212 is 12 mm, and the distance in the front - back direction between the adjacent lap joint steel bars two 212 front and back is 100 mm; to ensure the lateral stability of the precast wall;

[0074] The ring - shaped inserted bar 4 is vertically arranged throughout between the upper double - skin wall 2 and the lower double - skin wall 3. The width of the ring - shaped inserted bar 4 is 75 mm. The ring - shaped inserted bar 4 is located at the mid - point in the front - back direction between the adjacent lap joint steel bars two 212 front and back, ensuring that the joint area is not easily cracked;

[0075] The size of the notch one 213 is: height 305 mm, width 30 mm, length 30 mm.

[0076] When the two precast grooved bottom plates 11 on the left and right are hoisted, the horizontal notches 12 correspond one - to - one. The precast walls on both sides of the double - skin wall (upper double - skin wall 2, lower double - skin wall 3) are installed correspondingly below and above. After being installed in place, the cast - in - place layer is poured with the formwork as the formwork to realize the connection structure.

[0077] The present invention also discloses a construction method for the cross - shaped connection node between the concrete modular composite slab and the wall, including:

[0078] Step S1: Fabricate the lower double - skin wall 3; the specific fabrication process is as follows: First, bind the vertical steel bars 211 of the lower precast wall body 31 and the overlapping steel bars two 212 between the two lower precast wall bodies 31, and embed the inverted U - shaped inserted bars 214 and the annular inserted bars 4. Then, pour one of the lower precast wall bodies 31, and after it hardens, pour the other lower precast wall body 31;

[0079] Step S2: Fabricate the upper double - skin wall 2; the specific fabrication process is as follows: First, bind the vertical steel bars 211 of the upper precast wall body 21 and the overlapping steel bars two 212 between the two upper precast wall bodies 21. Then, pour one of the upper precast wall bodies 21, and after it hardens, pour the other upper precast wall body 21. The upper double - skin wall 2 is provided with a notch one 213;

[0080] Step S3: Fabricate two precast grooved bottom plates 11; the specific fabrication process of the precast grooved bottom plate 11 is as follows: Bind the steel bar structure one 14 of the precast grooved bottom plate 11, and then pour concrete to form the precast grooved bottom plate 11;

[0081] Step S4: Assemble the two lower precast wall bodies 31 and the two precast grooved bottom plates 11 on the formwork, and place the overlapping steel bar one 5 in the horizontal notch 12;

[0082] Step S5: After the installation in Step S4 is completed, pour the concrete in - situ parts of the lower double - skin wall 3, the precast grooved bottom plate 11 and the in - situ top plate 13 to form the in - situ top plate 13;

[0083] Step S6: After the concrete poured in Step S5 hardens, install the upper double - skin wall 2. The notch groups of the upper double - skin wall 2 are installed corresponding to the inverted U - shaped inserted bars 214 of the lower double - skin wall 3 one by one, and then pour the concrete in - situ part in the upper double - skin wall 2;

[0084] Step S7: Finally, pour a two - centimeter mortar layer.

[0085] The beneficial effects of the above - mentioned technical solution are as follows:

[0086] 1. The modular precast grooved bottom plate 11 with a horizontal notch 12 (strip - shaped notch) cancels the extended steel bars of the composite slab (specifically, the precast grooved bottom plate 11) in the joint in - situ area, and replaces them with the horizontal notch 12 opened at the end of the precast grooved bottom plate 11 and the setting of overlapping steel bars. The structure is simple, the construction is easy, the connection is reliable, which is convenient for module production, transportation, installation and splicing, and can effectively improve the integrity and safety of the modular building, shorten the construction process and improve the construction efficiency.

[0087] 2. The two - side precast walls and the in - situ layer form a connection of double - skin wall and grooved composite slab. The double - skin wall is stressed through the longitudinal steel bars in the precast formwork, reducing the binding of the steel bar cage. The force - transmission and stress mechanism of the structure is clear, and the coordinated stress of the formwork and the in - situ layer can be realized, having good seismic performance.

[0088] Compared with traditional concrete modular joints, the slotted composite slab-wall cross-shaped joint realizes the coordinated stress of the formwork and the cast-in-place layer. The steel consumption during module production is less than that of traditional joints, the wall thickness is reduced, which can significantly reduce the overall self-weight of the building, increase the internal space, reduce material waste and a large amount of on-site work.

[0089] Example 2. Based on Example 1, the concrete pouring includes:

[0090] Step S11: Detect the parameters of the concrete to be poured currently, and detect the environmental parameters of the area to be poured currently. The parameters of the concrete to be poured currently include: the slump of the concrete to be poured currently, the temperature of the concrete to be poured currently, and the unit weight of the concrete to be poured currently; the environmental parameters include the environmental temperature and the environmental wind speed;

[0091] Step S12: Obtain the allowable acting force of the concrete at different parts of the area to be poured currently;

[0092] Step S13: Obtain the flow velocity information at the inlet of the concrete pouring pipe and the flow velocity information at the outlet of the concrete pouring pipe within the last continuous M monitoring durations of the monitoring time of the pouring equipment before pouring the area to be poured currently, and obtain the conveying loss coefficient for each monitoring duration. When the conveying loss coefficient of any monitoring duration is greater than the loss coefficient threshold, give an alarm and replace the concrete pouring pipe, and then proceed to Step S14; during the actual pouring process of the pouring equipment, the monitoring work for one monitoring duration is carried out periodically. During the monitoring work, the flow velocity information at the inlet of the concrete pouring pipe and the flow velocity information at the outlet of the concrete pouring pipe are detected multiple times respectively; what is obtained in Step S13 is the flow velocity information monitored within the last M monitoring durations of the actual monitoring time before pouring the area to be poured currently;

[0093]

[0094] V j is the conveying loss coefficient of the jth monitoring duration obtained before pouring the area to be poured currently; is the average flow velocity at the inlet of the concrete pouring pipe within the jth monitoring duration obtained before pouring the area to be poured currently; is the average flow velocity at the outlet of the concrete pouring pipe within the jth monitoring duration obtained before pouring the area to be poured currently; is the minimum flow velocity at the outlet of the concrete pouring pipe within the jth monitoring duration obtained before pouring the area to be poured currently; e is the natural constant;

[0095] Step S14: Calculate the target flow rate based on Step S11, Step S12, and Step S13, and control the pouring equipment to work so that the flow rate at the inlet of the concrete pouring pipe is within the preset range of the target flow rate to pour the current area to be poured;

[0096]

[0097] is the target flow rate; F1 is the minimum value of the allowable concrete force at different components of the current area to be poured (unit: Pa); ρ is the actual measured value of the unit weight of the current concrete to be poured (obtained by detection based on Step S11); K1 is the setting rate influence coefficient of the components of the current concrete to be poured (obtained based on a preset table); M is the total number of environmental parameters that affect the setting of concrete; B i is the actual measured value of the i-th environmental parameter that affects the setting of concrete in the current area to be poured (obtained by detection based on Step S11); δ(B i ) is the setting rate influence coefficient corresponding to B i (obtained based on a preset correlation function or correlation table); ln is the natural logarithm, e is the natural constant; max represents the maximum value; θ(β) is the setting rate influence coefficient corresponding to the actual measured value of the slump of the current concrete to be poured (obtained by detection based on Step S11) (obtained based on a preset correlation function or correlation table); T is the actual measured value of the temperature of the current concrete to be poured (obtained by detection based on Step S11, unit: degree Celsius). For the pouring process in the first M monitoring durations of the new pouring pipe, Step S13 does not need to be executed, and when calculating the corresponding target flow rate, minV j , maxV j both take the initial conveying loss coefficient; M can be greater than or equal to 3; min represents the minimum value; In 200 and 15, the units are both degree Celsius;

[0098] The beneficial effects of the above technical solution are: Before pouring the current area to be poured, obtain: the parameters of the current concrete to be poured; the environmental parameters of the current area to be poured; the allowable concrete force at different components of the current area to be poured; the flow rate information at the inlet of the concrete pouring pipe and the flow rate information at the outlet of the concrete pouring pipe within the last (latest) continuous M monitoring durations of the monitoring time of the pouring equipment to determine the target flow rate, and control the pouring equipment to work so that the flow rate at the inlet of the concrete pouring pipe is within the preset range of the target flow rate to pour the current area to be poured; ensure that a suitable pouring flow rate is determined to adapt to the actual concrete state, environmental state, allowable stress state of the area to be poured, and conveying loss state of the pouring pipe, and ensure the pouring effect.

[0099] Example 3, based on Example 1 or 2, as Figures 8-11 shown, steps S1, S2, S3, S5, and S6 are all executed based on the concrete pouring equipment. The concrete pouring equipment includes a mixing device 7 and a concrete conveying device. The discharge port of the mixing device 7 is communicated with the feed port of the concrete conveying device (which can be an existing concrete conveying pump, such as the conveying pump disclosed in CN 216031572 U, and the conveying pump is connected to the pouring pipe through a hose). After screening the aggregates for preparing concrete, the mixing device 7 mixes and stirs the raw materials for preparing concrete. The mixing device 7 includes:

[0100] A housing 71, in the middle of the upper end of the housing 71, a cylindrical shell 72 is fixedly installed. Inside the cylindrical shell 72, a motor 73 is fixedly installed. The output shaft of the motor 73 is arranged vertically downward. The lower end of the output shaft of the motor 73 is fixedly connected to a vertical lead screw 74. The lower end of the vertical lead screw 74 is fixedly connected to a vertical electric telescopic rod 75. The fixed part 751 of the vertical electric telescopic rod is rotatably connected to the upper end of the housing 71. The telescopic part 752 of the vertical electric telescopic rod is located inside the housing 71 and is connected to a blade 76. The lower end of the telescopic part 752 of the vertical electric telescopic rod is fixedly provided with a sealing block 721. The periphery of the sealing block 721 is in sealing contact with the inner periphery of the discharge port 79 at the lower end of the housing 71. An inner sleeve 77 is threadedly sleeved on the vertical lead screw 74 (wherein, a lead screw nut can be embedded in the inner sleeve 77, and the lead screw nut cooperates with the vertical lead screw 74). The middle part of the outside of the inner sleeve 77 is sleeved with an outer sleeve 78 (the outer sleeve 78 can be rotatably sleeved or fixedly sleeved with the inner sleeve 77); at the lower end of the housing 71, a hopper 722 communicated with the discharge port 79 is provided. The discharge port 722 of the hopper 722 is communicated with the feed port of the concrete conveying device; wherein, a fixed bracket 10 can be provided at the lower end of the housing 71 for supporting on the placement surface of the mixing device (such as the ground);

[0101] Several groups of multi-functional filtering devices, several groups of multi-functional filtering devices are evenly spaced along the circumferential direction of the cylindrical shell 72. The multi-functional filtering device includes: a feed pipe 710, the lower part of the feed pipe 710 is fixedly penetrated through the upper end of the housing 71. A horizontal filter screen 723 is arranged inside the feed pipe 710. A discharge port 711 is arranged on one side of the feed pipe 710. A horizontal rod 712 slides through the side wall of the cylindrical shell 72 along the radial direction of the cylindrical shell 72. One end of a connecting rod 713 is hinged to the end of the horizontal rod 712 located inside the cylindrical shell 72. The other end of the connecting rod 713 is hinged to the corresponding side wall of the outer sleeve 78. A collection box 714 is arranged on one side of the feed pipe 710. The feed port of the collection box 714 is communicated with the discharge port 711. A push block 715 is arranged at the other end of the horizontal rod 712. The push block 715 penetrates through the corresponding side wall of the feed pipe 710. The push block 715 is used to push the aggregates above the horizontal filter screen 723 to the discharge port 711.

[0102] Specifically, the multi-functional filtering device further includes: a plurality of fixing blocks 716, which are arranged at intervals on the inner side wall of the feeding pipe 710. A first spring 717 is connected between the fixing blocks 716 and the lower end of the horizontal filter screen 723. A protrusion 718 is arranged on the first side of the lower end of the horizontal filter screen 723; the first side of the horizontal filter screen 723 along the radial direction of the cylindrical shell 72 close to the cylindrical shell 72 is the first side, and the second side of the horizontal filter screen 723 along the radial direction of the cylindrical shell 72 away from the cylindrical shell 72 is the second side; a slope 7181 is arranged on the first side of the protrusion 718; the height of the first side of the slope 7181 is higher than the height of the second side of the slope 7181. The second horizontal rod 720 is arranged parallel to the first horizontal rod 712. The second horizontal rod 720 penetrates the side wall of the first side of the feeding pipe 710. The second side of the second horizontal rod 720 contacts the slope 7181. The first side of the second horizontal rod 720 is connected to the first horizontal rod 712 through a second connecting rod 719;

[0103] The mixing device 7 further includes a vibration device 8. The vibration device 8 includes: a third horizontal rod 81, which penetrates the left side wall of the hopper 722 along the left-right direction. A cone 82 is integrally and fixedly arranged at the lower end of the sealing block 721. A conical surface 83 is arranged at the lower part of the cone 82. The distance between the left and right sides of the upper part of the conical surface 83 is greater than the distance between the left and right sides of the lower part of the conical surface 83. The left side of the third horizontal rod 81 is connected to a first collision ball 84 through a third connecting rod 87. The right side of the third horizontal rod 81 is connected to a second collision ball 85. A fixing plate 9 is fixedly arranged at the left part of the lower end of the outer shell 71. A second spring 86 is connected between the fixing plate 9 and the third connecting rod 87.

[0104] The horizontal filter screen 723 is used to screen the aggregates whose particle sizes need to be controlled in the raw materials for preparing concrete. Different aggregates to be screened are screened by the horizontal filter screens 723 with different pore diameters in different feeding pipes 710, so as to ensure that the particle sizes of the aggregates for preparing concrete meet the use requirements and ensure the quality of the finally prepared concrete; The collecting box 714 is also provided with a weighing device for weighing the aggregates in it in real time. After the pushing block 715 pushes the aggregates that cannot pass through the horizontal filter screen 723 on the horizontal filter screen 723 into the collecting box 714, according to the detection value of the weighing device and the weight of the aggregates added into the feeding pipe 710, the weight of the aggregates entering the mixing in the outer shell 71 can be obtained to ensure an appropriate mixing ratio of the aggregates.

[0105] The working principle and beneficial effects of the above technical solution are as follows:

[0106] 1. When the raw materials for preparing concrete are mixed:

[0107] (1) In the initial state, the second side of the horizontal rod two 720 contacts with the upper end of the inclined plane 7181. The aggregate to be screened enters the feed pipe 710 and is screened by the horizontal filter screen 723. First, control the motor 73 to rotate forward to drive the vertical lead screw 74 to rotate. Through the cooperation of the inner sleeve 77 and the vertical lead screw 74, the inner sleeve 77 moves downward, thereby pushing the horizontal rod one 712 away from each other through the connecting rod one 713. The horizontal rod one 712 drives the horizontal rod two 720 to move through the connecting rod two 719. Through the cooperation of the horizontal rod two 720 and the inclined plane 7181, the horizontal filter screen 723 and the protrusion 718 move upward as a whole to the position as shown in Figure 11 shown. Based on the position as shown in Figure 11 , when the motor 73 rotates in the reverse direction, the horizontal filter screen 723 moves downward under the action of the first spring 717. Thus, the up-and-down movement of the horizontal filter screen 723 can be realized to accelerate the screening of the aggregate. And when the raw materials for preparing concrete are mixed, the sealing block 721 is in the position as shown in Figure 8 shown, preventing the unmixed materials from being discharged. Moreover, the rotation of the motor 73 can drive the blade 76 to rotate to stir and mix the raw materials for preparing concrete;

[0108] (2) When the motor 73 is continuously controlled to rotate forward based on the position as shown in Figure 11 , the horizontal rod one 712 can be further pushed away from each other through the connecting rod one 713. The push block 715 moves on the upper end of the horizontal filter screen 723. The aggregate that cannot pass through the horizontal filter screen 723 by the push block 715 is pushed to the collection box 714 through the discharge port two 711, realizing the automatic discharge of the aggregate that cannot pass through the horizontal filter screen 723 and ensuring the screening efficiency of the horizontal filter screen 723.

[0109] (3) One motor 73 realizes three functions: First, driving the blade 76 to stir and mix the raw materials for preparing concrete; Second, realizing the up-and-down movement of multiple horizontal filter screens 723 to accelerate the screening of the aggregate; Third, realizing the discharge of the aggregate that cannot pass through the horizontal filter screens 723 on multiple horizontal filter screens 723, which is convenient to control;

[0110] 2. When discharging the mixed concrete:

[0111] (1) In the position as shown in Figure 8On the basis of this, control the vertical electric telescopic rod 75 to extend downward, so that the sealing block 721 moves downward to open the first discharge port 79, enabling the mixed concrete in the housing 71 to enter the hopper 722, then enter the concrete conveying device through the hopper 722, and be conveyed and poured through the concrete conveying device. Moreover, as the sealing block 721 moves downward, it drives the cone 82 to move downward. Through the cooperation of the second collision ball 85 and the conical surface 83, the second collision ball 85 and the horizontal rod three 81 move leftward as a whole, enabling the second collision ball 85 to collide with the hopper 722, accelerating the discharging of the hopper 722. Then, control the vertical electric telescopic rod 75 to shorten upward, so that the horizontal rod three 81 moves rightward under the action of the second spring 86, enabling the first collision ball 84 to collide with the hopper 722, accelerating the discharging of the hopper 722. Through the alternating action of the first collision ball 84 and the second collision ball 85, the discharging efficiency of the present invention can be ensured. And the up-and-down movement of the telescopic part 752 of the vertical electric telescopic rod can prevent the first discharge port 79 from being blocked.

[0112] (2) The vertical electric telescopic rod 75 realizes four functions: First, the up-and-down movement of the telescopic part 752 of the vertical electric telescopic rod can prevent the first discharge port 79 from being blocked. Second, the first discharge port 79 can be opened or closed. Third, it can drive the first collision ball 84 and the second collision ball 85 to collide with the hopper 722, accelerating the discharging of the hopper 722. Fourth, the up-and-down movement of the telescopic part 752 of the vertical electric telescopic rod, in conjunction with the rotation of the motor 73, enables the blades 76 connected to the vertical electric telescopic rod 75 to stir different parts of the housing 71, and the cone 82 to stir different positions in the hopper 722.

[0113] Embodiment 4, on the basis of any one of Embodiments 1 - 3, further includes:

[0114] The process of manufacturing the lower double skin wall 3 in step S1 includes:

[0115] Step S101: Obtain the material parameters of the concrete of the lower precast wall 31, the dimensions of the lower precast wall 31, the material parameters of the inverted U-shaped reinforcement 214, and the dimensions of the inverted U-shaped reinforcement 214.

[0116] Step S102: Obtain, in the same type of lower precast wall 31 with qualified pouring: the actual historical arrangement spacing in the front-back direction of the inverted U-shaped reinforcement 214, and the included angle between the side surface of the inverted U-shaped reinforcement 214 and the top surface of the lower precast wall 31.

[0117] Step S03: Calculate the insertion depth of the inverted U-shaped reinforcement 214 into the lower precast wall 31 based on steps S101 and S102.

[0118]

[0119] d0 is the diameter of the bar body of the inverted U-shaped reinforcing bar 214, E1 is the elastic modulus of the concrete in the lower precast wall 31; E2 is the elastic modulus of the inverted U-shaped reinforcing bar 214; B is the flexural moment of inertia of the inverted U-shaped reinforcing bar 214; γ is a constant, with a value of 0.0025, unit 1 / mm; L is the average value of the actually obtained historical front-back direction arrangement spacing in step S102; H is the depth of the inverted U-shaped reinforcing bar 214 buried in the lower precast wall 31; E3 is the compressive strength of the concrete in the lower precast wall 31; E4 is the compressive strength of the inverted U-shaped reinforcing bar 214; F1 is the shear force that the lower double-skin wall 3 can withstand; ln is the natural logarithm, e is the natural constant; d2 is the unit diameter; G is the spacing correction coefficient; h2 is the height of the concrete in the lower precast wall 31; h1 is the height of the inverted U-shaped reinforcing bar 214 (in this embodiment, the height direction ( Figure 1 in the up-down direction) is the direction in which the inverted U-shaped reinforcing bar 214 is inserted into the lower precast wall 31); θ is the angle between the side surface of the inverted U-shaped reinforcing bar 214 and the top surface of the lower precast wall 31 obtained in step S102; sin is the sine; S is the cross-sectional area of the bar body of the U-shaped reinforcing bar 214.

[0120] The beneficial effects of the above technical solution are: Based on: the material parameters of the concrete of the lower precast wall 31, the dimensions of the lower precast wall 31; the material parameters of the inverted U-shaped reinforcing bar 214, the dimensions of the inverted U-shaped reinforcing bar 214; the position information of the inverted U-shaped reinforcing bar 214 in the same type of lower precast wall 31 with qualified casting; calculating the depth of the inverted U-shaped reinforcing bar 214 inserted into the lower precast wall 31, and the calculation is reliable;

[0121] Actually insert the inverted U-shaped reinforcing bar 214 into the lower precast wall 31 at this depth H and then pour the lower precast wall 31 to ensure the connection strength between the inverted U-shaped reinforcing bar 214 and the lower precast wall.

[0122] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and its equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. Construction method of cross-shaped connection node between concrete modular laminated slab and wall, characterized in that, Including: Step S1: Fabricate the lower double - skin wall (3); the specific fabrication process is as follows: First, bind the vertical steel bars (211) of the lower precast wall body (31) and the lap steel bars two (212) between the two lower precast wall bodies (31), and embed the inverted U - shaped inserted steel bars (214) and the annular inserted steel bars (4). Then, pour one of the lower precast wall bodies (31), and after it hardens, pour the other lower precast wall body (31). Step S2: Fabricate the upper double - skin wall (2); the specific fabrication process is as follows: First, bind the vertical steel bars (211) of the upper precast wall body (21) and the lap steel bars two (212) between the two upper precast wall bodies (21). Then, pour one of the upper precast wall bodies (21), and after it hardens, pour the other upper precast wall body (21). The upper double - skin wall (2) is provided with a notch one (213). Step S3: Fabricate two precast grooved bottom plates (11); the specific fabrication process of the precast grooved bottom plate (11) is as follows: Bind the steel bar structure one (14) of the precast grooved bottom plate (11), and then pour concrete to form the precast grooved bottom plate (11). Step S4: Assemble the two lower precast wall bodies (31) and the two precast grooved bottom plates (11) on the formwork, and place the lap steel bars one (5) in the horizontal notch (12). Step S5: After the installation in Step S4 is completed, pour the concrete in - situ parts of the lower double - skin wall (3), the precast grooved bottom plate (11), and the in - situ top plate (13) to form the in - situ top plate (13). Step S6: After the concrete poured in Step S5 hardens, install the upper double - skin wall (2). The notch groups of the upper double - skin wall (2) are installed in one - to - one correspondence with the inverted U - shaped inserted steel bars (214) of the lower double - skin wall (3), and then pour the concrete in - situ part in the upper double - skin wall (2). Step S7: Finally, pour a two - centimeter mortar layer. Pouring concrete includes: Step S11: Detect the parameters of the concrete to be poured currently, and detect the environmental parameters of the area to be poured currently. The parameters of the concrete to be poured currently include: the slump of the concrete to be poured currently, the temperature of the concrete to be poured currently, and the unit weight of the concrete to be poured currently. The environmental parameters include the environmental temperature and the environmental wind speed. Step S12: Obtain the allowable acting force of the concrete at different parts of the area to be poured currently. Step S13: Obtain the flow velocity information at the inlet and the flow velocity information at the outlet of the concrete pouring pipe within the last continuous M monitoring durations of the monitoring time of the pouring equipment before pouring the area to be poured currently, and obtain the conveying loss coefficient for each monitoring duration. Step S14: Calculate the target flow velocity based on Step S11, Step S12, and Step S13, and control the pouring equipment to work so that the flow velocity at the inlet of the concrete pouring pipe is within the preset range of the target flow velocity to pour the area to be poured currently.

2. The construction method of the cross-shaped connection node between the concrete modular laminated slab and the wall according to claim 1, characterized in that, Pouring concrete includes: The conveying loss coefficient is calculated based on the following formula: V j is the conveying loss coefficient for the j-th monitoring duration obtained before pouring the current area to be poured; is the average flow velocity at the inlet of the concrete pouring pipe during the j-th monitoring duration obtained before pouring the current area to be poured; is the average flow velocity at the outlet of the concrete pouring pipe during the j-th monitoring duration obtained before pouring the current area to be poured; is the minimum flow velocity at the outlet of the concrete pouring pipe during the j-th monitoring duration obtained before pouring the current area to be poured; e is the natural constant; The target flow velocity is calculated based on the following formula: is the target flow rate; F1 is the minimum value of the allowable concrete acting force at different components in the current area to be concreted; ρ is the actually detected value of the unit weight of the concrete to be concreted currently; K1 is the setting rate influence coefficient of the components of the concrete to be concreted currently; M is the total number of environmental parameters that affect the setting of the concrete; B i is the actually detected value of the i-th environmental parameter that affects the setting of the concrete in the current area to be concreted; δ(B i ) is the setting rate influence coefficient corresponding to B i ; ln is the natural logarithm, e is the natural constant; max represents the maximum value; θ(β) is the setting rate influence coefficient corresponding to the actually detected value of the slump of the concrete to be concreted currently; T is the actually detected value of the temperature of the concrete to be concreted currently; min represents the minimum value.

3. The construction method of the cross-shaped connection node between the concrete modular composite slab and the wall according to claim 1, characterized in that, Steps S1, S2, S3, S5, and S6 are all executed based on a concrete pouring device. The concrete pouring device includes a mixing device (7) and a concrete conveying device. The discharge port of the mixing device (7) is communicated with the feed port of the concrete conveying device. After screening the aggregates for preparing concrete, the mixing device (7) mixes and stirs the raw materials for preparing concrete. The mixing device (7) includes: A housing (71). In the middle of the upper end of the housing (71), a cylindrical shell (72) is fixedly installed. A motor (73) is fixedly installed inside the cylindrical shell (72). The output shaft of the motor (73) is arranged vertically downward. The lower end of the output shaft of the motor (73) is fixedly connected to a vertical lead screw (74). The lower end of the vertical lead screw (74) is fixedly connected to a vertical electric telescopic rod (75). The fixed part (751) of the vertical electric telescopic rod is rotatably connected to the upper end of the housing (71). The telescopic part (752) of the vertical electric telescopic rod is located inside the housing (71) and is connected to a blade (76). A sealing block (721) is fixedly arranged at the lower end of the telescopic part (752) of the vertical electric telescopic rod. The periphery of the sealing block (721) is in sealing contact with the inner wall periphery of the discharge port one (79) at the lower end of the housing (71). An inner sleeve (77) is threadedly sleeved on the vertical lead screw (74). An outer sleeve (78) is sleeved in the middle of the outer side of the inner sleeve (77). A hopper (722) communicated with the discharge port one (79) is arranged at the lower end of the housing (71). The discharge port three of the hopper (722) is communicated with the feed port of the concrete conveying device. Several groups of multifunctional filtering devices. The several groups of multifunctional filtering devices are evenly arranged at intervals along the circumferential direction of the cylindrical shell (72). The multifunctional filtering device includes: a feed pipe (710). The lower part of the feed pipe (710) fixedly penetrates the upper end of the housing (71). A horizontal filter screen (723) is arranged inside the feed pipe (710). A discharge port two (711) is arranged on one side of the feed pipe (710). A horizontal rod one (712) slides radially through the side wall of the cylindrical shell (72). One end of a connecting rod one (713) is hinged to the end of the horizontal rod one (712) located inside the cylindrical shell (72). The other end of the connecting rod one (713) is hinged to the corresponding side wall of the outer sleeve (78). A collection box (714) is arranged on one side of the feed pipe (710). The feed port of the collection box (714) is communicated with the discharge port two (711). A push block (715) is arranged at the other end of the horizontal rod one (712). The push block (715) penetrates the corresponding side wall of the feed pipe (710). The push block (715) is used to push the aggregates above the horizontal filter screen (723) to the discharge port two (711).

4. The construction method of the cross-shaped connection node between the concrete modular laminated slab and the wall according to claim 3, characterized in that The multi-functional filtering device further includes: a plurality of fixing blocks (716) which are arranged at intervals on the inner side wall of the feed pipe (710), a first spring (717) is connected between the fixing block (716) and the lower end of the horizontal filter screen (723), and a protrusion (718) is arranged on the first side of the lower end of the horizontal filter screen (723); the first side of the horizontal filter screen (723) is the side close to the cylindrical shell (72) along the radial direction of the cylindrical shell (72), and the second side of the horizontal filter screen (723) is the side far from the cylindrical shell (72) along the radial direction of the cylindrical shell (72); a slope (7181) is arranged on the first side of the protrusion (718); the height of the first side of the slope (7181) is higher than the height of the second side of the slope (7181), the second horizontal rod (720) is arranged parallel to the first horizontal rod (712), the second horizontal rod (720) penetrates through the side wall of the first side of the feed pipe (710), the second side of the second horizontal rod (720) contacts with the slope (7181), and the first side of the second horizontal rod (720) is connected to the first horizontal rod (712) through the second connecting rod (719). The mixing device (7) further includes a vibration device (8), and the vibration device (8) includes: a third horizontal rod (81) which penetrates through the left side wall of the hopper (722) along the left-right direction, a cone (82) is integrally and fixedly arranged at the lower end of the sealing block (721), a conical surface (83) is arranged at the lower part of the cone (82), the distance between the left and right sides of the upper part of the conical surface (83) is greater than the distance between the left and right sides of the lower part of the conical surface (83), a first collision ball (84) is connected to the left side of the third horizontal rod (81) through a third connecting rod (87), a second collision ball (85) is connected to the right side of the third horizontal rod (81), a fixing plate (9) is fixedly arranged at the left part of the lower end of the outer shell (71), and a second spring (86) is connected between the fixing plate (9) and the third connecting rod (87).

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