A UHPC prefabricated wall panel and construction method thereof

Abstract

The present invention provides a UHPC prefabricated wall panel, comprising a wall panel body, a sound insulation board and a steel bar skeleton arranged in the wall panel body, a plurality of protrusions are arranged on the two end surfaces opposite to each other of the sound insulation board, a horizontal positioning hole having the same length direction as the width direction of the sound insulation board is opened on the side wall of each protrusion, a plurality of lugs are arranged on the two side walls opposite to each other of the sound insulation board, a vertical positioning hole is opened on each lug, and the steel bar skeleton comprises a horizontal main reinforcement passing through the horizontal positioning hole, a vertical main reinforcement passing through a plurality of vertical positioning holes at the same time, and stirrups connected to the horizontal main reinforcement and the vertical main reinforcement. The UHPC prefabricated wall panel uses the steel bar skeleton to position the sound insulation board, so during production and processing, there is no need to install a special sound insulation board positioning frame to position the sound insulation board, which is conducive to reducing the processing cost of the UHPC prefabricated wall panel and can also increase the connection strength between the steel bar skeleton and the sound insulation board.

Description

Technical Field

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

[0002] Ultra-high performance concrete, referred to as UHPC (Ultra-High Performance Concrete), also known as reactive powder concrete, is the most innovative cement-based engineering material in the past three decades. Ultra-high performance concrete includes two aspects of "ultra-high": ultra-high durability and ultra-high mechanical properties. UHPC is the most durable engineering material. The mechanical properties of properly reinforced UHPC components are close to those of steel structures. At the same time, UHPC components have excellent wear resistance and explosion resistance. Therefore, UHPC components are particularly suitable for large-span bridges, explosion-proof structures (commonly used in military projects, bank vaults, etc.) and thin-walled structures, as well as for use in highly abrasive and highly corrosive environments. At present, UHPC components have been cited in some actual projects, such as large-span pedestrian overpasses, highway and railway bridges, and prefabricated structures.

[0003] Prefabricated structure is the abbreviation of prefabricated reinforced concrete structure. It is a reinforced concrete structure that is assembled and connected with prefabricated components as the main load-bearing components. Prefabricated structure is one of the important directions of the development of my country's building structure. It is conducive to the development of my country's building industrialization, improving production efficiency, saving energy, developing green and environmentally friendly buildings, and is conducive to improving and ensuring the quality of construction projects. At present, the prefabricated concrete frame structure that is widely promoted and constructed is mainly a prefabricated integral concrete frame connected by a superimposed cast-in-place method. The main components are prefabricated beams, prefabricated columns, prefabricated external wall panels, prefabricated internal wall partitions, prefabricated floor slabs, prefabricated balcony panels, prefabricated air-conditioning panels, prefabricated stairs, etc.

[0004] The existing prefabricated sound insulation wall panels include a wall panel body, a sound insulation board arranged in the wall panel body, and a steel frame. When producing the prefabricated sound insulation wall panels, workers need to simultaneously install a steel bar positioning frame and a sound insulation board positioning frame to respectively position the steel frame and the sound insulation board, which increases the processing cost of the prefabricated sound insulation wall panels. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a UHPC prefabricated wall panel and a construction method thereof in view of the above-mentioned deficiencies existing in the prior art, which solves the problem of high processing cost existing in the prior art.

[0006] The above-mentioned object of the present invention is achieved through the following technical scheme: A UHPC prefabricated wall panel, comprising a wall panel body, a sound insulation board arranged in the wall panel body and a steel frame, wherein the sound insulation board is provided with a plurality of protrusions on both end surfaces opposite to each other, and a transverse positioning hole having a length direction the same as a width direction of the sound insulation board is provided on the side wall of each protrusion, and a plurality of lugs are provided on the two side walls opposite to each other of the sound insulation board, and a vertical positioning hole is provided on each lug, and the steel frame comprises a transverse main reinforcement passing through the transverse positioning hole, a vertical main reinforcement passing through a plurality of vertical positioning holes at the same time, and stirrups connected to the transverse main reinforcement and the vertical main reinforcement.

[0007] The present invention is further configured as follows: a reinforcement groove is opened at the bottom of the end surface of the wall panel body, and a reinforcement device is arranged on the wall panel body, the reinforcement device includes a reinforcement frame arranged in the reinforcement groove, the reinforcement frame includes a mounting plate, a connecting plate vertically arranged on the mounting plate and connected to the groove wall of the reinforcement groove, and a reinforcing rib arranged between the top surface of the mounting plate and the side wall of the connecting plate.

[0008] The present invention is further configured as follows: a mounting hole is provided on the top surface of the mounting plate, a reinforcement shell is passed through the mounting hole, an inner groove is provided on the top surface of the reinforcement shell, a plurality of bar storage slide grooves connected to the inner groove are provided on the outer side wall of the reinforcement shell, an outwardly protruding rack is slidably provided in the bar storage slide groove, one end of the outwardly protruding rack close to the slot of the bar storage slide groove is pointed, and a bar control mechanism for controlling the outwardly protruding rack to slide out of the bar storage slide groove is provided in the inner groove.

[0009] The present invention is further configured as follows: the strip control mechanism comprises an adjustment shaft rotatably arranged at the center of the inner groove, and an adjustment gear coaxially arranged on the adjustment shaft and meshing with the externally protruding rack.

[0010] The present invention is further configured as follows: a reinforcement cover is provided on the top surface of the reinforcement shell and is in contact with the top surface of the mounting plate; a through hole is provided on the top surface of the reinforcement cover for the adjustment shaft to pass through; anti-slip patterns are provided on the outer side wall of the part of the adjustment shaft passing through the through hole; and a positioning flange is provided on the outer side wall of the adjustment shaft and is abutted against the bottom surface of the reinforcement cover.

[0011] The present invention is further configured as follows: a plurality of internal threaded holes are provided on the top surface of the reinforcement shell, a plurality of internal countersunk holes aligned with the internal threaded holes are provided on the top surface of the reinforcement cover, and each of the internal countersunk holes is provided with an internal countersunk screw threadedly connected to the internal threaded hole.

[0012] The present invention is further configured as follows: a plurality of external threaded holes located outside the mounting holes are opened on the top surface of the mounting plate, a plurality of external countersunk holes aligned with the external threaded holes are opened on the top surface of the reinforcement cover, and each of the external countersunk holes is provided with an external countersunk screw threadedly connected to the external threaded hole.

[0013] The present invention also discloses a construction method of a UHPC prefabricated wall panel, the construction method comprising the following steps:

[0014] Step 1: Measure and lay out;

[0015] Step 2: Correct the skewed embedded steel bars;

[0016] Step 3: Place the adjustment gasket;

[0017] Step 4: Hoisting prefabricated wall panels;

[0018] Step 5: pour and fill the connection seam between the wall panel body and the prefabricated bottom plate;

[0019] Step 6: Workers fill concrete into the reinforcement grooves and level the concrete.

[0020] The present invention is further configured as follows: Step 4 comprises the following steps:

[0021] Step 4.1: The crane lifts the prefabricated wall panel and, according to the marking range of the prefabricated wall panel installation horizontal reference line, lifts the prefabricated wall panel to the installation position where its bottom surface is 0.8 to 1.2 meters above the surface of the prefabricated bottom plate, and the crane stops lowering the prefabricated wall panel;

[0022] Step 4.2: The worker guides the prefabricated wall panel to descend to a height of 0.3-0.5 meters above the surface of the prefabricated bottom plate by hand, and the crane stops the prefabricated wall panel below. Then the worker puts the mirror with the mirror facing up under the prefabricated wall panel, and uses the mirror to observe whether the embedded steel bars and the steel bar sockets are aligned. After the embedded steel bars and the steel bar sockets are correctly aligned, the crane slowly lowers the prefabricated wall panel, and the embedded steel bars are inserted into the steel bar sockets. When the bottom surface of the wall panel body contacts the adjusting gasket, the crane stops lowering the prefabricated wall panel;

[0023] Step 4.3: Install the diagonal support, adjust the diagonal support, and correct the verticality of the wall panel body;

[0024] Step 4.4: Remove the hook from the crane and then remove the lifting lugs from the wall panel body.

[0025] The present invention is further configured as follows: Step 5 comprises the following steps:

[0026] Step 5.1: A casting template is installed on the side wall of the wall panel body, which encloses the joint into a closed space and has a grouting hole, and then the grouting pipe of the grouting machine is inserted into the grouting hole to perform grouting. When the grouting pressure of the grouting machine reaches a preset standard, the grouting hole is blocked;

[0027] Step 5.2: The worker rotates the adjustment shaft, which in turn drives the adjustment gear to rotate, which pushes the protruding rack meshing with the adjustment gear to slide out of the bar slide groove and insert into the concrete slurry around the reinforcement shell. When the strength of the concrete in the joint reaches the standard strength, the casting formwork is removed.

[0028] In summary, the beneficial technical effects of the present invention are:

[0029] (1) The UHPC prefabricated wall panel uses a steel frame to position the sound insulation board. Therefore, during production and processing, there is no need to install a special sound insulation board positioning frame to position the sound insulation board, which is beneficial to reducing the processing cost of the UHPC prefabricated wall panel and can also increase the connection strength between the steel frame and the sound insulation board.

[0030] (2) A reinforcement device is provided on the wall panel body of the UHPC prefabricated wall panel, and the reinforcement device includes a reinforcement shell and an outwardly protruding tooth bar that can be inserted into the concrete layer around the reinforcement shell. By providing the reinforcement device, the wall panel body, the concrete layer in the connection joint, and the prefabricated bottom plate can be more firmly connected as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the UHPC prefabricated wall panel in the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the sound insulation board and the steel frame in the present invention;

[0033] Figure 3 It is a partial cutaway schematic diagram of the UHPC prefabricated wall panel and prefabricated bottom panel in the present invention;

[0034] Figure 4 It is a structural schematic diagram of the reinforcement device in the present invention;

[0035] Figure 5 is a schematic cross-sectional view of the reinforcement shell in the present invention;

[0036] Figure 6 yes Figure 4 Half-section diagram of .

[0037] In the above drawings: 1. wall panel body; 2. sound insulation board; 3. convex block; 4. horizontal positioning hole; 5. lug; 6. vertical positioning hole; 7. horizontal main reinforcement; 8. vertical main reinforcement; 9. stirrup; 101. reinforcement socket; 102. lifting ear; 11. reinforcement groove; 12. reinforcement frame; 121. mounting plate; 122. connecting plate; 123. reinforcing rib; 13. mounting hole; 14. reinforcement shell; 15. inner groove; 16. bar sliding groove; 17. external protruding rack; 18. adjustment shaft; 19. adjustment gear; 20. internal threaded hole; 21. reinforcement cover; 22. internal countersunk hole; 23. internal countersunk screw; 24. external threaded hole; 25. external countersunk hole; 26. external countersunk screw; 27. perforation; 28. anti-slip pattern; 29. ​​positioning flange; 30. prefabricated base plate; 31. embedded steel bars. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0039] like Figure 1 and 2 As shown, the present invention proposes a UHPC prefabricated wall panel, comprising a wall panel body 1, a sound insulation board 2 arranged in the wall panel body 1, and a steel frame.

[0040] like Figure 1 and 2 As shown, the sound insulation board 2 is a rock wool board, which is an artificial inorganic fiber processed by high-temperature melting, and has the function of sound absorption and noise reduction. The two end surfaces of the sound insulation board 2 are integrally connected with a plurality of equally spaced protrusions 3, the cross section of which is a rectangle plus a semicircle, the length direction of which is the same as the width direction of the sound insulation board 2, and a circular horizontal positioning hole 4 is provided through the side wall of each protrusion 3, the length direction of which is the same as the width direction of the sound insulation board 2. The two side walls of the sound insulation board 2 are integrally connected with a plurality of pairs of equally spaced lugs 5, the cross section of which is a rectangle and a semicircle, and a circular vertical positioning hole 6 is provided on the top surface of each lug 5.

[0041] like Figure 1 and 2 As shown, the steel skeleton includes transverse main reinforcement 7, vertical main reinforcement 8, and stirrups 9. The transverse main reinforcement 7, vertical main reinforcement 8, and stirrups 9 are all threaded steel bars. The transverse main reinforcement 7 passes through the transverse positioning hole 4, and the vertical main reinforcement 8 passes through multiple vertical positioning holes 6 in the same row at the same time. The stirrups 9 hook the transverse main reinforcement 7 and the vertical main reinforcement 8 at the same time, and the connection points of the stirrups 9 and the transverse main reinforcement 7 and the vertical main reinforcement 8 are connected together by welding.

[0042] The UHPC prefabricated wall panel uses a steel frame to position the sound insulation board 2. Therefore, during production and processing, there is no need to install a special sound insulation board positioning frame to position the sound insulation board 2, which is beneficial to reducing the processing cost of the UHPC prefabricated wall panel and can also increase the connection strength between the steel frame and the sound insulation board 2.

[0043] like Figure 3 As shown, the wall panel body 1 is cast with UHPC, which is ultra-high performance concrete, also known as active powder concrete. It is the most innovative cement-based engineering material in the past thirty years. Ultra-high performance concrete includes two aspects of "ultra-high": ultra-high durability and ultra-high mechanical properties. UHPC is the most durable engineering material. The mechanical properties of properly reinforced UHPC components are close to those of steel structures. At the same time, UHPC components have excellent wear resistance and explosion resistance. Therefore, using UHPC to form the wall panel body 1 can increase the service life of the UHPC prefabricated wall panel. A plurality of steel bar insertion holes 101 are provided on the bottom surface of the wall panel body 1, and the steel bar insertion holes 101 are circular holes. A pair of lifting ears 102 are provided on the top surface of the wall panel body 1, and a lifting threaded hole threadedly connected to the lifting ear 102 is provided on the top surface of the wall panel body 1. The wall panel body 1 can be detachably connected to the pair of lifting ears 102 through the lifting threaded hole.

[0044] like Figure 1 and 4 As shown, a reinforcement groove 11 is provided at the bottom of the end surface of the wall panel body 1, and the bottom of the reinforcement groove 11 extends to be flush with the bottom surface of the wall panel body 1. A reinforcement device is provided on the wall panel body 1, and the reinforcement device includes a reinforcement frame 12 arranged in the reinforcement groove 11, and the reinforcement frame 12 includes an integrally connected mounting plate 121, a connecting plate 122 and a reinforcing rib 123, the mounting plate 121 is horizontally arranged in the reinforcement groove 11, the connecting plate 122 is vertically arranged on the mounting plate 121, the connecting plate 122 is screwed to the groove wall of the reinforcement groove 11, and the reinforcing rib 123 is integrally connected between the top surface of the mounting plate 121 and the side wall of the connecting plate 122, and the cross section of the reinforcing rib 123 is triangular, and the reinforcing rib 123 is used to improve the connection strength between the mounting plate 121 and the connecting plate 122.

[0045] like Figure 4 and 6 As shown, a mounting hole 13 is provided on the top surface of the mounting plate 121, and the cross section of the mounting hole 13 is circular. A reinforcement shell 14 is inserted into the mounting hole 13, and an inner groove 15 with a circular cross section is provided on the top surface of the reinforcement shell 14. Two groups of bar storage slide grooves 16 are provided on the outer wall of the reinforcement shell 14, and the two groups of bar storage slide grooves 16 are located at different heights in the reinforcement shell 14, and each group of bar storage slide grooves 16 includes four coplanar bar storage slide grooves 16, and the length direction of the four bar storage slide grooves 16 is tangent to the inner groove 15, and each bar storage slide groove 16 is connected to the inner groove 15.

[0046] like Figure 5 and 6 As shown, each bar storage slot 16 is slidably provided with an outward protruding rack 17, and one end of the outward protruding rack 17 near the slot of the bar storage slot 16 is pointed, so that the outward protruding rack 17 is conveniently inserted into the concrete around the reinforcement shell 14. A bar control mechanism is provided in the inner slot 15, and the bar control mechanism is used to control the outward protruding rack 17 to make reciprocating sliding motion along the bar storage slot 16, so that the outward protruding rack 17 can slide out of the bar storage slot 16. The bar control mechanism includes an adjustment shaft 18 and an adjustment gear 19, and the adjustment shaft 18 is rotatably provided at the center of the inner slot 15, and the adjustment gear 19 is integrally connected to the adjustment shaft 18, and the adjustment gear 19 is coaxial with the adjustment shaft 18, and the number of the adjustment gears 19 is two, and each adjustment gear 19 is coplanar with the four outward protruding racks 17 in the same group, and the adjustment gear 19 is meshed with the outward protruding rack 17.

[0047] like Figure 5 and 6 As shown, four internal thread holes 20 are provided on the top surface of the reinforcement shell 14, and the four internal thread holes 20 are equidistantly distributed on the circumference. A reinforcement cover 21 is provided on the top surface of the reinforcement shell 14, and the reinforcement cover 21 is fitted with the top surface of the mounting plate 121. Four internal countersunk holes 22 are provided on the top surface of the reinforcement cover 21, and the internal countersunk holes 22 are step holes. The four internal countersunk holes 22 are aligned with the four internal thread holes 20 respectively, and each internal countersunk hole 22 is provided with an internal countersunk screw 23 threadedly connected to the internal thread hole 20.

[0048] like Figure 5 and 6 As shown, four external threaded holes 24 are provided on the top surface of the mounting plate 121. The four external threaded holes 24 are all located outside the mounting hole 13 and are equidistantly distributed around the circumference. Four external countersunk holes 25 are provided on the top surface of the reinforcement cover 21. The external countersunk holes 25 are step holes. The four external countersunk holes 25 are aligned with the four external threaded holes 24 respectively. Each external countersunk hole 25 is provided with an external countersunk screw 26 threadedly connected to the external threaded hole 24.

[0049] like Figure 5 and 6 As shown, a through hole 27 is provided at the center of the top surface of the reinforcement cover 21. The cross section of the through hole 27 is circular. The through hole 27 is used for the adjustment shaft 18 to pass through. The outer wall of the adjustment shaft 18 passing through the through hole 27 is provided with anti-skid patterns 28. By providing the anti-skid patterns 28, it is not easy for workers to slip when turning the adjustment shaft 18. A positioning flange 29 is integrally connected to the outer wall of the adjustment shaft 18. The cross section of the positioning flange 29 is circular. The positioning flange 29 abuts against the bottom surface of the reinforcement cover 21, so that the adjustment shaft 18 is restricted from moving up and down, and the adjustment gear 19 can maintain a coplanar state with the corresponding protruding rack 17.

[0050] During the construction of prefabricated buildings, the UHPC prefabricated wall panels are usually installed on a prefabricated base plate 30, in which prefabricated base plate 30 is pre-embedded pre-embedded steel bars 31 extending out of its surface, and the pre-embedded steel bars 31 are plugged into and matched with the steel bar insertion holes 101 to position the UHPC prefabricated wall panels.

[0051] A construction method of a UHPC prefabricated wall panel, the construction method comprising the following steps:

[0052] Step 1: Measure and lay out.

[0053] In step 1, the worker first cleans the surface of the prefabricated base plate 30 to ensure that there are no obstacles in the construction area, and determines the surface of the prefabricated base plate 30 as the construction reference surface. According to the preset drawing, the worker measures and marks the horizontal reference line for the installation of the prefabricated wall panel on the construction reference surface.

[0054] Step 2: Correct the skewed embedded steel bars 31.

[0055] In step 2, the dedicated steel bar positioning plate refers to a steel bar measuring tool that is made by punching holes on a plate body according to the position and size of the embedded steel bars 31 in the preset drawing. During construction, workers use steel bar correction sleeves to straighten the bent embedded steel bars 31, and then use the dedicated steel bar positioning plate to check the position and verticality of the embedded steel bars 31. If the verticality of the embedded steel bars 31 does not meet the requirements, the embedded steel bars 31 will continue to be corrected until all the embedded steel bars 31 meet the standard verticality requirements.

[0056] Step 3: Place the adjustment shims.

[0057] In step 3, the worker places a row of adjustment shims within the marked range of the horizontal reference line for the installation of the prefabricated wall panels, then uses a level to check the elevation of each adjustment shim, and then replaces the adjustment shims that do not meet the standard elevation requirements until all the adjustment shims meet the standard elevation requirements. The adjustment shims are rubber shims used to support the prefabricated wall panels.

[0058] Step 4: Hoisting prefabricated wall panels.

[0059] Step 4.1: The crane lifts the prefabricated wall panel and lifts the prefabricated wall panel to the installation position where its bottom surface is 0.8 to 1.2 meters above the surface of the prefabricated bottom plate 30 according to the marking range of the prefabricated wall panel installation horizontal reference line, and the crane stops lowering the prefabricated wall panel;

[0060] Step 4.2: The worker guides the prefabricated wall panel to descend to a height of 0.3 to 0.5 meters from the bottom surface of the prefabricated bottom plate 30 by hand, and the crane stops the prefabricated wall panel below. Then the worker puts a mirror with the mirror surface facing up under the prefabricated wall panel, and uses the mirror to observe whether the embedded steel bars 31 and the steel bar insertion holes 101 are aligned. After the embedded steel bars 31 and the steel bar insertion holes 101 are correctly aligned, the crane slowly lowers the prefabricated wall panel, and the embedded steel bars 31 are inserted into the steel bar insertion holes 101. When the bottom surface of the wall panel body 1 is against the adjusting gasket, the crane stops lowering the prefabricated wall panel;

[0061] Step 4.3: Install the diagonal support, adjust the diagonal support, and correct the verticality of the wall panel body 1;

[0062] Step 4.4: Remove the hook of the crane, and then remove the lifting lug 102 on the wall panel body 1.

[0063] In step 4, the prefabricated wall panels are hoisted in a segmented manner, which is beneficial to improving the installation accuracy of the prefabricated wall panels. Using a mirror as an auxiliary tool to observe whether the embedded steel bars 31 and the steel bar insertion holes 101 are correctly aligned can, to a certain extent, avoid the problem of workers sticking their heads under the prefabricated wall panels to observe whether the embedded steel bars 31 and the steel bar insertion holes 101 are correctly aligned, which is beneficial to protecting the safety of workers and avoiding safety accidents to a certain extent.

[0064] Step 5: pouring and filling the connection seam between the wall panel body 1 and the prefabricated bottom plate 30.

[0065] Step 5.1: A casting template is installed on the side wall of the wall panel body 1 to enclose the joint into a closed space and have a grouting hole, and then a grouting pipe of a grouting machine is inserted into the grouting hole to perform grouting. When the grouting pressure of the grouting machine reaches a preset standard, the grouting hole is blocked;

[0066] Step 5.2: The worker rotates the adjusting shaft 18, thereby driving the adjusting gear 19 to rotate, which will push the protruding rack 17 meshing with the adjusting gear 19 to slide out of the bar sliding groove 16 and insert into the concrete slurry around the reinforcement shell 14. When the strength of the concrete in the joint reaches the standard strength, the casting template is removed.

[0067] In the step 5, the casting template is a flat template, and the number of casting templates is four. The four casting templates enclose the connection seam into a closed space. The worker uses a nail gun to fix the four casting templates on the wall surface of the wall panel body 1, and then inserts the grouting pipe of the grouting machine into the grouting hole and performs grouting. When the grouting pressure of the grouting machine reaches the preset standard, the grouting hole is blocked, and then the worker rotates the adjusting shaft 18, thereby driving the adjusting gear 19 to rotate, which will push the outer protruding rack 17 meshing with the adjusting gear 19 to slide out of the bar sliding groove 16 and insert into the concrete slurry around the reinforcement shell 14. When the strength of the concrete in the connection seam reaches the standard strength, the casting template is removed. At this time, the outer protruding rack 17 remains inserted into the concrete layer around the reinforcement shell 14, so that the wall panel body 1, the concrete layer in the connection seam, and the prefabricated bottom plate 30 can be more firmly connected as a whole.

[0068] Step 6: Workers fill concrete into the reinforcement groove 11 and level the concrete.

[0069] In step 6, the worker scoops up concrete with a trowel and fills the concrete into the reinforcement groove 11, and then smoothes the concrete in the reinforcement groove 11 with a trowel to keep the wall surface of the wall panel body 1 flat.

[0070] A reinforcement device is provided on the wall panel body 1 of the UHPC prefabricated wall panel, and the reinforcement device includes a reinforcement shell 14 and an outwardly protruding toothed bar 17 that can be inserted into the concrete layer around the reinforcement shell 14. By providing the reinforcement device, the wall panel body 1, the concrete layer in the connection seam, and the prefabricated bottom plate 30 can be more firmly connected as a whole.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A UHPC prefabricated wall panel, comprising a wall panel body (1), a sound insulation board (2) arranged in the wall panel body (1) and a steel frame, characterized in that: The sound insulation board (2) is provided with a plurality of protrusions (3) on both end surfaces facing each other, and a transverse positioning hole (4) having a length direction identical to a width direction of the sound insulation board (2) is provided on the side wall of each protrusion (3); the sound insulation board (2) is provided with a plurality of lugs (5) on both end walls facing each other, and each lug (5) is provided with a vertical positioning hole (6); the steel reinforcement skeleton comprises a transverse main reinforcement (7) passing through the transverse positioning hole (4), a vertical main reinforcement (8) passing through the plurality of vertical positioning holes (6) at the same time, and stirrups (9) connected to the transverse main reinforcement (7) and the vertical main reinforcement (8); A reinforcement groove (11) is provided at the bottom of the end surface of the wall panel body (1), and a reinforcement device is provided on the wall panel body (1), wherein the reinforcement device comprises a reinforcement frame (12) arranged in the reinforcement groove (11), and the reinforcement frame (12) comprises a mounting plate (121), a connecting plate (122) vertically arranged on the mounting plate (121) and connected to the groove wall of the reinforcement groove (11), and a reinforcing rib (123) arranged between the top surface of the mounting plate (121) and the side wall of the connecting plate (122); A mounting hole (13) is provided on the top surface of the mounting plate (121), a reinforcement shell (14) is inserted into the mounting hole (13), an inner groove (15) is provided on the top surface of the reinforcement shell (14), a plurality of strip storage slide grooves (16) connected to the inner groove (15) are provided on the outer side wall of the reinforcement shell (14), an outer protruding toothed bar (17) is slidably provided in the strip storage slide groove (16), one end of the outer protruding toothed bar (17) close to the notch of the strip storage slide groove (16) is pointed, and a strip control mechanism for controlling the outer protruding toothed bar (17) to slide out of the strip storage slide groove (16) is provided in the inner groove (15); The strip control mechanism comprises an adjustment shaft (18) rotatably arranged at the center of the inner groove (15), and an adjustment gear (19) coaxially arranged on the adjustment shaft (18) and meshing with the outer protruding gear rack (17); A reinforcement cover (21) is arranged on the top surface of the reinforcement shell (14) and is in contact with the top surface of the mounting plate (121); a through hole (27) is provided on the top surface of the reinforcement cover (21) for the adjustment shaft (18) to pass through; an anti-slip pattern (28) is arranged on the outer side wall of the portion of the adjustment shaft (18) passing through the through hole (27); and a positioning flange (29) is arranged on the outer side wall of the adjustment shaft (18) and is against the bottom surface of the reinforcement cover (21); A plurality of internal threaded holes (20) are provided on the top surface of the reinforcement shell (14); a plurality of internal countersunk holes (22) aligned with the internal threaded holes (20) are provided on the top surface of the reinforcement cover (21); each internal countersunk hole (22) is provided with an internal countersunk screw (23) threadedly connected to the internal threaded hole (20); The top surface of the mounting plate (121) is provided with a plurality of external threaded holes (24) located outside the mounting hole (13); the top surface of the reinforcement cover (21) is provided with a plurality of external countersunk holes (25) aligned with the external threaded holes (24); each of the external countersunk holes (25) is provided with an external countersunk screw (26) threadedly connected to the external threaded hole (24).

2. A construction method comprising the UHPC prefabricated wall panel according to claim 1, characterized in that: The construction method comprises the following steps: Step 1: Measure and lay out; Step 2: Correcting the deflected embedded steel bars (31); Step 3: Place the adjustment gasket; Step 4: Hoisting prefabricated wall panels; Step 4.1: The crane lifts the prefabricated wall panel and, according to the marking range of the prefabricated wall panel installation horizontal reference line, lifts the prefabricated wall panel to the installation position where its bottom surface is 0.8 to 1.2 meters above the surface of the prefabricated bottom plate (30), and the crane stops lowering the prefabricated wall panel; Step 4.2: The worker guides the prefabricated wall panel by hand to descend to a height of 0.3 to 0.5 meters from the bottom surface of the prefabricated bottom plate (30), and the crane stops the prefabricated wall panel below. Then the worker puts a mirror with the mirror surface facing upward under the prefabricated wall panel, and uses the mirror to observe whether the embedded steel bars (31) and the steel bar insertion holes (101) are aligned. After the embedded steel bars (31) and the steel bar insertion holes (101) are correctly aligned, the crane slowly lowers the prefabricated wall panel, and the embedded steel bars (31) are inserted into the steel bar insertion holes (101). When the bottom surface of the wall panel body (1) contacts the adjusting gasket, the crane stops lowering the prefabricated wall panel. Step 4.3: Install the diagonal support, adjust the diagonal support, and correct the verticality of the wall panel body (1); Step 4.4: Remove the hook of the crane, and then remove the lifting lug (102) on the wall panel body (1); Step 5: pouring and filling the connection seam between the wall panel body (1) and the prefabricated bottom plate (30); Step 5.1: A casting template is installed on the side wall of the wall panel body (1) to enclose the joint into a closed space and have a grouting hole, and then a grouting pipe of a grouting machine is inserted into the grouting hole to perform grouting. When the grouting pressure of the grouting machine reaches a preset standard, the grouting hole is sealed; Step 5.2: The worker rotates the adjustment shaft (18), thereby driving the adjustment gear (19) to rotate, which pushes the protruding rack (17) meshed with the adjustment gear (19) to slide out of the strip-hiding slot (16) and insert into the concrete slurry around the reinforcement shell (14). When the strength of the concrete in the joint reaches the standard strength, the casting template is removed; Step 6: Workers fill concrete into the reinforcement groove (11) and level the concrete.

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