CN218597505U

CN218597505U - Prefabricated sandwich wall panel

Info

Publication number: CN218597505U
Application number: CN202222663623.XU
Authority: CN
Inventors: 赵瑞滑; 顾军平; 沈洋; 王磊; 王冰
Original assignee: Jiangsu Xinyu Housing Industry Technology Co ltd
Current assignee: Jiangsu Xinyu Housing Industry Technology Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-03-10
Anticipated expiration: 2032-10-10

Abstract

The utility model discloses a prefabricated sandwich wallboard, including the interior page or leaf wall, heat preservation wall and the outer page or leaf wall of connection of range upon range of in proper order, outer page or leaf wall includes concrete layer and reinforcing bar net, and the reinforcing bar net includes horizontal reinforcing bar and longitudinal reinforcement, still is provided with coupling assembling between interior page or leaf wall and the concrete layer, and coupling assembling includes bolt, nut, support piece and compresses tightly the piece, bolt and nut screw-thread fit with horizontal reinforcing bar and longitudinal reinforcement clamp tightly in compressing tightly between piece and the support piece and lock on the heat preservation wall. This prefabricated sandwich wallboard cooperatees through bolt and nut, makes compressing tightly piece and support piece press from both sides the reinforcing bar net of establishing horizontal reinforcing bar and vertical reinforcing bar and constitute to lock the reinforcing bar net on the heat preservation wall, avoid the skew, conveniently pour the concrete immediately on the heat preservation wall after being connected with interior page or leaf wall simultaneously in order to form concrete layer, improve the efficiency of construction, and need not to glue, reduce cost.

Description

Prefabricated sandwich wall panel

Technical Field

The utility model belongs to the technical field of the prefab technique and specifically relates to a press from both sides core heat preservation wallboard is related to.

Background

The prefabricated concrete sandwich heat-insulating external wall panel is a prefabricated sandwich wall panel for short, is an external enclosure component of an assembled building, has good heat-insulating function of the building, is an effective wall body heat-insulating mode, and has better durability, higher safety and short construction period compared with an external heat-insulating mode or an internal heat-insulating mode of a box body.

In order to enhance the fireproof performance of the sandwich wall panel and reduce the thermal bridge effect to improve the heat insulation effect of the sandwich wall panel, in the prior art, for example, the chinese patent with the publication number "CN110306720B" discloses a precast concrete sandwich heat insulation external wall panel, which comprises an inner leaf concrete wall panel, an aerogel fiber felt, an outer leaf concrete wall panel and a plurality of connecting pieces, wherein the sandwich heat insulation external wall panel forms the connecting pieces by combining a connecting core body and a connecting sleeve, and the connecting pieces are matched with each other to reduce the thermal bridge effect at the connecting part of the heat insulation external wall panel, and the aerogel fiber felt is adopted to enhance the fireproof performance.

However, when the installation of the aerogel fiber mat is completed, the steel bar mesh used by the outer leaf concrete wallboard needs to be installed immediately, and the pouring of the outer leaf concrete wallboard is completed by using common concrete, but the steel bar mesh lacks a corresponding positioning device, so that the position of the steel bar mesh is easy to shift when the concrete is poured, the forming quality is reduced, and in addition, when the steel bar mesh is manufactured, transverse steel bars and longitudinal steel bars which are mutually vertical in distribution direction need to be bound, so that the construction is complicated, and the overall production efficiency is reduced; moreover, although this core heat preservation wallboard passes through feed port, discharge opening, fenestrate cooperation, realizes the gluing of connecting piece and aerogel and even, guarantees joint strength, but the structure is complicated, and in the connection process, still need use the gluing agent, increases manufacturing cost to production efficiency has further been reduced.

There is therefore a need for improvements in the prior art of prefabricated sandwich wall panels.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a prevent reinforcing bar net skew, reduce cost and improve the prefabricated sandwich wallboard of efficiency of construction.

In order to realize the technical effect, the utility model adopts the technical scheme that: the utility model provides a prefabricated sandwich wallboard, includes interior page or leaf wall, heat preservation wall and the outer page or leaf wall of range upon range of connection in proper order, outer page or leaf wall include concrete layer with set up in the intraformational reinforcing bar net of concrete, the reinforcing bar net including the horizontal reinforcing bar that distributes side by side and along the vertical reinforcing bar that horizontal reinforcing bar length direction distributes side by side, interior page or leaf wall with still be provided with coupling assembling between the concrete layer, coupling assembling including running through the bolt of interior page or leaf wall, with the nut that interior page or leaf wall is connected, set up in reinforcing bar net with support piece between the heat preservation wall with set up in the reinforcing bar net is back to the piece that compresses tightly of heat preservation wall one side, the bolt with nut screw-thread fit with horizontal reinforcing bar and vertical reinforcing bar clamp in compress tightly between the piece with the support piece and lock in on the heat preservation wall.

Preferably, for the convenience of positioning the transverse steel bars, the transverse steel bars are arranged on one side, adjacent to the heat-insulating wall, of the longitudinal steel bars, and the support piece is provided with transverse positioning grooves which extend in the length direction parallel to the transverse steel bars and are upwards provided with notches.

Preferably, in order to increase the number of the transverse reinforcing steel bars which can be positioned by the supporting piece and reduce the number of the supporting pieces which are installed on the heat insulation wall, the manufacturing cost of the sandwich wallboard is further reduced, and meanwhile, the construction efficiency is improved, two transverse positioning grooves are arranged on the supporting piece and are distributed on two sides of the supporting piece side by side along the length direction of the longitudinal reinforcing steel bars, and the distance between every two adjacent transverse positioning grooves is consistent with the distance between every two adjacent transverse reinforcing steel bars.

Preferably, for the convenience of location vertical reinforcing bar, support piece's both sides top all is provided with the location breach, the location breach set up in horizontal positioning groove is the back of the body one side of heat preservation wall, the circumference outer fringe of vertical reinforcing bar with the inboard wall of location breach is laminated mutually.

Preferably, in order to increase the number of the longitudinal steel bars which can be positioned by the supporting piece and reduce the number of the supporting pieces which are installed on the heat insulation wall, the manufacturing cost of the sandwich wallboard is further reduced, and meanwhile, the construction efficiency is improved.

Preferably, for the convenience of locating the installation position of the supporting piece on the heat insulation wall, the heat insulation wall and a locating convex strip which are in sliding fit are arranged between the supporting pieces, and the locating groove and the locating convex strip extend in the length direction which is parallel to the transverse locating groove.

Preferably, in order to prevent the supporting member from being separated from the thermal insulation wall, the groove inner space of the positioning groove comprises a wide-distance inner space and a narrow-distance outer space which are distributed along the groove depth direction, the width of the cross section of the wide-distance inner space is larger than that of the cross section of the narrow-distance outer space, and the narrow-distance outer space is positioned between the wide-distance inner space and the notch of the positioning groove; the positioning groove is matched with the positioning convex strip.

Preferably, in order to facilitate the support of the support member, the number of the positioning grooves on the heat-insulating wall is increased simultaneously to increase the contact area between the heat-insulating wall and the concrete layer and reinforce the connection between the heat-insulating wall and the concrete layer, the positioning convex strip is fixed on the support member, extends along the length direction parallel to the transverse steel bars, and is distributed in two side by side along the length direction parallel to the longitudinal steel bars.

Preferably, in order to increase the contact area between the concrete layer and the support member, after the concrete is reinforced and poured, the connection strength between the concrete layer and the support member is increased, and a pouring gap is formed between the support member and the heat preservation wall.

Preferably, in order to increase the number of the longitudinal steel bars which can be compressed by the compression piece and reduce the number of the compression pieces, so as to reduce the cost of the sandwich wallboard and improve the construction efficiency, the compression piece is in the shape of a long strip plate parallel to the length direction of the transverse positioning groove, and at least two longitudinal steel bars are abutted with the compression piece.

To sum up, the utility model discloses prefabricated sandwich wallboard compares with prior art, cooperatees through bolt and nut, makes compressing tightly piece and support piece press from both sides the reinforcing bar net of establishing horizontal reinforcement and longitudinal reinforcement and constituteing to lock the reinforcing bar net on the heat preservation wall, avoid the skew, the convenient heat preservation after being connected with interior leaf wall of while is poured concrete immediately in order to form concrete layer on the wall, improves the efficiency of construction, and need not to splice reduce cost.

Drawings

FIG. 1 is a schematic structural view of example 1;

fig. 2 is a schematic structural view of fig. 1 with a concrete layer and an inner leaf wall omitted;

FIG. 3 is a schematic view of the structure of FIG. 1 from another perspective with the concrete layer and inner leaf wall omitted;

FIG. 4 is a partial schematic view of FIG. 2;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is an exploded schematic view of FIG. 4;

FIG. 7 is a schematic view of the connecting assembly of embodiment 1;

FIG. 8 is a side view of the connection structure of the thermal insulation wall, the connection members and the reinforcing mats according to example 2;

in the figure: 100. the concrete-filled concrete slab comprises an inner leaf wall, 200 insulating layers, 300 concrete layers, 400 reinforcing meshes, 401 transverse reinforcing bars, 402 longitudinal reinforcing bars, 500 bolts, 600 nuts, 700 supporting pieces, 701 transverse positioning grooves, 702 positioning notches, 800 pressing pieces, 900 positioning grooves, 901 wide-space inner spaces, 902 narrow-space outer spaces, 110 positioning convex strips and 120 pouring gaps.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

As shown in fig. 1 to 7, the prefabricated sandwich wall panel of embodiment 1 includes an inner leaf wall 100, an insulating layer 200 and an outer leaf wall, which are sequentially connected in a stacked manner, wherein the thickness of the inner leaf wall 100 is 20cm, and the main structure and the casting molding process of the prefabricated sandwich wall panel are consistent with those of the prefabricated concrete sandwich insulating outer wall panel disclosed in the chinese patent publication No. CN110306720B, and are not described herein again; the thickness of the heat-insulating layer 200 is 5cm, and the aerogel fiber felt has good heat-insulating property and good fireproof property; the outer leaf wall has an overall thickness of 7cm and includes a concrete layer 300 formed by casting concrete, a reinforcing mesh 400 is provided in the concrete layer 300, the reinforcing mesh 400 includes nine transverse reinforcing bars 401 arranged side by side and nine longitudinal reinforcing bars 402 arranged side by side, the transverse reinforcing bars 401 extend along the length direction of the concrete layer 300, and the longitudinal reinforcing bars 402 extend along the width direction of the concrete layer 300.

Still be provided with eleven coupling assembling between interior page or leaf wall 100 and concrete layer 300, coupling assembling falls into four rows, as shown in fig. 2, it has two coupling assembling altogether to play the third row coupling assembling from a left side to the right side, all the other three rows of coupling assembling all are provided with three coupling assembling, the coupling assembling in every row of coupling assembling all follows transverse reinforcement 401's length direction interval distribution, and in being arbitrary a coupling assembling, the position at arbitrary three not collinear coupling assembling place is isosceles triangle's three summit, so, guarantee the homogeneity that coupling assembling distributes.

The concrete structure of the connection assembly is as shown in fig. 4, 5 and 7, the connection assembly comprises a bolt 500 penetrating through the inner leaf wall 100, the bolt 500 is in threaded connection with a nut 600, the nut 600 and one end of the rod part of the bolt 500, which is far away from the head part of the bolt, are all fixed in the inner leaf wall 100, a supporting part 700 and a pressing part 800 are arranged between the head part of the bolt 500 and the insulating layer 200, the rod part of the bolt 500 penetrates through the pressing part 800, the supporting part 700 and the insulating layer 200 in sequence, a reinforcing mesh 400 is arranged between the supporting part 700 and the pressing part 800, the bolt 500 is in threaded fit with the nut 600, when the nut 600 abuts against one side of the insulating layer 200, which is adjacent to the inner leaf wall 100, and the head part of the bolt 500 abuts against the pressing part 800, the transverse steel bars 401 and the longitudinal steel bars 402 are clamped between the pressing part 800 and the supporting part 700 and locked on the insulating layer 200.

After the structure is adopted, when the prefabricated sandwich wall panel is produced, the connecting assembly is mounted on the heat insulation layer 200 in advance, the transverse steel bars 401 and the longitudinal steel bars 402 are clamped between the supporting member 700 and the pressing member 800 by the bolts 500 and the nuts 600 which are matched with each other in a threaded manner, meanwhile, the supporting member 700, the pressing member 800, the transverse steel bars 401 and the longitudinal steel bars 402 are locked on the heat insulation layer 200 by the heads of the bolts 500 and the nuts 600, the reinforcing mesh 400 formed by the nine transverse steel bars 401 and the nine longitudinal steel bars 402 is tightly bound on the heat insulation layer 200 through the joint action of a plurality of connecting assemblies, on one hand, the positioning and fixing of the reinforcing mesh 400 are realized, on the other hand, when the inner leaf wall 100 is molded by casting, the side of the heat insulation layer 200 opposite to the reinforcing mesh 400 is attached to the inner leaf wall 100, firstly, the tail parts of the nuts 600 and the bolts 500 are connected with the concrete of the inner leaf 100, and after the concrete is molded by curing, the tail parts of the nuts 600 and the bolts 500 are fixedly connected with the connecting assembly and the inner leaf wall 100; on the other side of the insulation layer 200, since the reinforcing mesh 400 composed of the transverse reinforcing bars 401 and the longitudinal reinforcing bars 402 is locked on the insulation layer 200, concrete can be directly poured on the insulation layer 200, after the concrete is cured and formed into the concrete layer 300, the concrete layer 300 and the reinforcing mesh 400 are combined to form an outer wall, and finally the outer wall, the insulation layer 200 and the inner wall 100 are sequentially connected in a stacked manner to form the prefabricated sandwich wall panel as shown in fig. 1.

In the prefabricated sandwich wall panel of the embodiment, the insulating layer 200 is bound with the reinforcing mesh 400 through the connecting component in advance, so that concrete can be conveniently and directly poured to form the concrete layer 300, the displacement of the reinforcing mesh 400 during pouring is avoided, the construction efficiency is favorably improved, the connecting component is not required to be glued, the connecting component is formed by the bolt 500 and the nut 600 which are in threaded connection, the supporting piece 700 and the pressing piece 800 are arranged between the head of the bolt 500 and the nut 600, the structure is simple, and the locking is convenient, so that the production cost of the prefabricated member is reduced.

It should be noted that, in the related description of the embodiments of the present invention, the thicknesses of the inner leaf wall 100, the insulating layer 200 and the outer leaf wall, the material of the insulating layer 200, the number of the connecting members and the distribution manner thereof, and the number of the transverse steel bars 401 and the longitudinal steel bars 402 are not limited by the above description.

As shown in fig. 4, 6 and 7, the transverse reinforcing steel bars 401 are arranged between the longitudinal reinforcing steel bars 402 and the insulating layer 200, the two sides of the support member 700 are provided with transverse positioning grooves 701, the length direction of each transverse positioning groove 701 is consistent with the length direction of each transverse reinforcing steel bar 401, the notch of each transverse positioning groove 701 faces upwards, and the distance between two transverse positioning grooves 701 on the support member 700 is consistent with the distance between two adjacent transverse reinforcing steel bars 401; the tops of the two sides of the support member 700 are both provided with positioning notches 702, the positioning notches 702 face back to the heat preservation layer 200, the positioning notches 702 are arranged on one side of the transverse positioning groove 701, which is back to the heat preservation layer 200, and the circumferential outer edges of the longitudinal steel bars 402 are attached to the inner side walls of the positioning notches 702; the top of each of the two sides of the support member 700 is provided with two positioning notches 702 distributed in a direction parallel to the length direction of the transverse steel bar 401, and the distance between the two positioning notches 702 is consistent with the distance between the two adjacent longitudinal steel bars 402; the pressing member 800 is in the form of a long strip plate parallel to the length direction of the transverse positioning slot 701, and the two longitudinal steel bars 402 placed in the two positioning notches 702 are abutted to the pressing member 800 in the state that the steel bar net 400 is locked.

After the structure is adopted, after the supporting member 700 is placed on the heat insulating layer 200, the two transverse positioning grooves 701 on the supporting member 700 facilitate positioning of the placement positions of the two transverse reinforcing steel bars 401, the two positioning notches 702 on the side wall of the top of the supporting member 700 facilitate placement of the longitudinal reinforcing steel bars 402, the longitudinal reinforcing steel bars 402 placed in the positioning notches 702 are supported by the two transverse reinforcing steel bars 401 placed in the front, then the pressing prevention member 800 is placed on the two longitudinal reinforcing steel bars 402, the bolt 500 sequentially penetrates through the pressing member 800, the supporting member 700 and the heat insulating layer 200, the nut 600 is screwed into one side of the heat insulating layer 200, which is opposite to the reinforcing mesh 400, and is in threaded connection with the bolt 500 through the nut 600, so that the head of the bolt 500 and the nut 600 clamp the heat insulating layer 200, the supporting member 700 and the pressing member 800, and in this state, the two transverse reinforcing steel bars 401 and the two longitudinal reinforcing steel bars 402 are clamped between the supporting member 700 and the pressing member 800, thereby locking the two transverse reinforcing steel bars 401 and the two longitudinal reinforcing steel bars 402 on the heat insulating layer 200. Through the operations of the connecting components in sequence, the reinforcing mesh 400 consisting of the nine transverse reinforcing bars 401 and the nine longitudinal reinforcing bars 402 is finally locked on the heat-insulating layer 200, so that the concrete layer 300 is formed after the concrete is directly poured.

In order to facilitate the positioning of the support member 700, positioning grooves 900 and positioning ribs 110 which are in sliding fit are arranged between the insulating layer 200 and the support member 700, and both the positioning grooves 900 and the positioning ribs 110 extend in a direction parallel to the length direction of the transverse positioning groove 701, specifically, two positioning ribs 110 which are distributed side by side along the length direction of the longitudinal steel bar 402 are arranged on the support member 700, a plurality of positioning grooves 900 which are distributed side by side along the length direction of the longitudinal steel bar 402 are arranged on one side of the insulating layer 200 adjacent to the steel bar mesh 400, and two positioning ribs 110 on the support member 700 correspond to and are in sliding fit with two of the positioning grooves 900.

After the structure is adopted, the positioning groove 900 is used for facilitating the sliding of the positioning convex strip 110, the position of the support member 700 on the heat insulation layer 200 is adjusted, the length direction position of the transverse positioning groove 701 is fixed, so that the position of the transverse steel bar 401 is positioned, then the positioning convex strip 110 slides on the positioning groove 900, so that the placement position of the longitudinal steel bar 402 is adjusted, and the position locking is performed by the bolt 500 and the nut 600 which are matched with each other through threads; moreover, the design of the positioning groove 900 increases the surface area of the heat insulation layer 200, so that after concrete is poured, the contact area between the formed concrete layer 300 and the heat insulation layer 200 is increased, and the bonding strength between the concrete layer 300 and the heat insulation layer 200 is further enhanced; in addition, the positioning protruding strips 110 are provided with two and fixed on the supporting member 700, so that the supporting effect on the supporting member 700 is achieved, the casting gap 120 is formed between the supporting member 700 and the heat preservation layer 200, and thus, in the process of casting concrete, the concrete enters the casting gap 120 and is subjected to post-curing molding, the contact area between the concrete layer 300 and the supporting member 700 is increased, and the connection strength between the supporting member 700 and the concrete layer 300 is enhanced.

Example 2

As shown in fig. 8, the prefabricated sandwich wall panel of example 2 is based on example 1, and is different from example 1 in that the in-groove space of the positioning groove 900 includes a wide-distance inner space 901 and a narrow-distance outer space 902 distributed along the groove depth direction thereof, the width of the cross section of the wide-distance inner space 901 is greater than that of the cross section of the narrow-distance outer space 902, the narrow-distance outer space 902 is located between the wide-distance inner space 901 and the notch of the positioning groove 900, specifically, the positioning groove 900 is a T-shaped groove, and the positioning groove 900 is matched with the positioning rib 110.

Because the width of the cross section of the wide-distance inner space 901 is greater than that of the cross section of the narrow-distance outer space 902, after the positioning convex strips 110 matched with the positioning grooves 900 slide into the positioning grooves 900, the positioning convex strips cannot be separated from the positioning grooves 900 from the notches of the positioning grooves 900, namely, the support member 700 cannot be separated from the heat insulation layer 200 along the groove depth direction of the positioning grooves 900, so that the support member 700 is stably connected with the heat insulation layer 200; of course, the positioning groove 900 may be a groove with other structures, such as an L-shaped groove, a dovetail groove, etc., as an alternative to the similar effect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A prefabricated sandwich wallboard comprises an inner leaf wall (100), a heat preservation wall (200) and an outer leaf wall which are sequentially connected in a stacking mode, wherein the outer leaf wall comprises a concrete layer (300) and a reinforcing mesh (400) arranged in the concrete layer (300), the reinforcing mesh (400) comprises transverse reinforcing steel bars (401) distributed side by side and longitudinal reinforcing steel bars (402) distributed side by side along the length direction of the transverse reinforcing steel bars (401), and the prefabricated sandwich wallboard is characterized in that:

interior page or leaf wall (100) with still be provided with coupling assembling between concrete layer (300), coupling assembling is including running through bolt (500) of interior page or leaf wall (100), with nut (600) that interior page or leaf wall (100) are connected, set up in reinforcing bar net (400) with support piece (700) between heat preservation wall (200) with set up in reinforcing bar net (400) are dorsad compress tightly piece (800) of heat preservation wall (200) one side, bolt (500) with nut (600) screw-thread fit with horizontal reinforcing bar (401) and longitudinal reinforcement (402) press from both sides in compress tightly piece (800) with between support piece (700) and lock in on heat preservation wall (200).

2. The prefabricated sandwich wall panel of claim 1, characterized in that: the transverse steel bars (401) are arranged on one side, adjacent to the heat preservation wall (200), of the longitudinal steel bars (402), and transverse positioning grooves (701) are formed in the supporting pieces (700), extend in the length direction parallel to the transverse steel bars (401), and are upwards in notches.

3. The prefabricated sandwich wall panel of claim 2, characterized in that: the supporting piece (700) is provided with two transverse positioning grooves (701), the transverse positioning grooves are distributed on two sides of the supporting piece (700) side by side along the length direction of the longitudinal steel bars (402), and the distance between every two adjacent transverse positioning grooves (701) is consistent with the distance between every two adjacent transverse steel bars (401).

4. The prefabricated sandwich wall panel of claim 2, characterized in that: the both sides top of support piece (700) all is provided with location breach (702), location breach (702) set up in horizontal constant head tank (701) is back to one side of heat preservation wall (200), the circumference outer fringe of longitudinal reinforcement (402) with the inboard wall of location breach (702) is laminated mutually.

5. The prefabricated sandwich wallboard of claim 4, wherein: the positioning notches (702) in the inner side wall of the transverse positioning groove (701) are arranged in two, the positioning notches are distributed at intervals in the length direction parallel to the transverse positioning groove (701), and the distance between every two adjacent positioning notches (702) is consistent with the distance between every two adjacent longitudinal steel bars (402).

6. The prefabricated sandwich wall panel of claim 2, characterized in that: heat preservation wall (200) with be provided with sliding fit's positioning groove (900) and location sand grip (110) between support piece (700), positioning groove (900) with location sand grip (110) all along being on a parallel with the length direction extension of horizontal constant head tank (701).

7. The prefabricated sandwich wallboard of claim 6, wherein: the in-groove space of the positioning groove (900) comprises a wide-distance inner space (901) and a narrow-distance outer space (902) which are distributed along the groove depth direction, the width of the cross section of the wide-distance inner space (901) is larger than that of the cross section of the narrow-distance outer space (902), and the narrow-distance outer space (902) is positioned between the wide-distance inner space (901) and the notch of the positioning groove (900); the positioning groove (900) is matched with the positioning convex strip (110).

8. The prefabricated sandwich wall panel of claim 6, characterized in that: the positioning convex strips (110) are fixed on the supporting piece (700), extend along the length direction parallel to the transverse steel bars (401), and are distributed in two rows along the length direction parallel to the longitudinal steel bars (402).

9. The prefabricated sandwich wallboard of claim 6, wherein: and a pouring gap (120) is arranged between the supporting piece (700) and the heat-insulating wall (200).

10. The prefabricated sandwich wall panel of claim 2, characterized in that: the pressing piece (800) is in a long strip plate shape parallel to the length direction of the transverse positioning groove (701), and at least two longitudinal steel bars (402) are abutted against the pressing piece (800).