CN216340279U

CN216340279U - Prefabricated form removal-free concrete hollow wall structure

Info

Publication number: CN216340279U
Application number: CN202122668419.2U
Authority: CN
Inventors: 郑永春
Original assignee: Zhao Red Bell
Current assignee: Zhao Red Bell
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-19
Anticipated expiration: 2031-11-03

Abstract

The utility model relates to the technical field of assembly type buildings, in particular to a prefabricated form-removal-free concrete hollow wall structure. The anti-expansion formwork back rib comprises a precast concrete single-side wall plate, wall thickness limiting blocks, an detaching-free formwork and an detaching-free formwork anti-expansion formwork back rib, wherein the precast concrete single-side wall plate and the detaching-free formwork are arranged in parallel, and are connected and fixed through a plurality of split bolt sets penetrating through the wall thickness limiting blocks, and a plurality of detaching-free formwork anti-expansion formwork back ribs are arranged at intervals on the outer side of the detaching-free formwork. The utility model has simple structure, parallel production of the wall boards on the two sides, simple process, low production cost, quick effect, work efficiency improvement and energy consumption reduction.

Description

Prefabricated form removal-free concrete hollow wall structure

Technical Field

The utility model relates to the technical field of assembly type buildings, in particular to a prefabricated form-removal-free concrete hollow wall structure.

Background

With the rapid development of the industrialized process of buildings in China, the demand of concrete prefabricated parts is increased year by year. In the fabricated building of China, the shear wall structure accounts for the largest proportion, and the technology is the most complicated. In the current specifications of China, shear walls are divided into two types: solid shear walls and hollow shear walls (also known as double-sided superposed shear walls and hollow walls). The hollow wall is also called as an assembled integral double-sided superposed shear wall and consists of an inner leaf wall, an outer leaf wall and a cavity, the hollow wall is prefabricated and formed in a factory, connecting reinforcing steel bars are arranged in the cavity and concrete is poured in the cavity, so that the wall structures are fully connected up and down and left and right to form a vertical stress system of a building. Compared with a solid shear wall, the hollow wall has the advantages of convenience in manufacturing, reliability in connection, excellent anti-seismic performance, easiness in installation and the like.

The existing hollow wall structure form and the production process are as follows:

the insertion type is turned over by the truss ribs: and manufacturing a single-layer reinforcing mesh, paving the reinforcing mesh in the wallboard mould, and then paving the truss ribs. And pouring concrete, and curing and forming to form the single wallboard with the truss ribs. The truss rib wallboard is turned by using the turning equipment, so that the wallboard surface where the truss ribs are located faces downwards and is aligned to the bottom wallboard. At the moment, the concrete is just poured into the bottom wallboard, the truss ribs of the upper wallboard are inserted into the concrete of the bottom wallboard before the concrete is hardened, the insertion depth is about 20mm generally, and the thickness of a single wallboard is only 50mm-60mm according to the requirement of domestic specifications. And curing and forming the two layers of wallboards together to finally form the hollow wall. The disadvantages of the turnover insertion type by using the truss ribs are as follows: the equipment is complex and the investment is huge; the procedure is rechecked, and the molding is required to be carried out in sequence, so that the production efficiency is low; secondary co-curing wastes energy consumption; when the upset was inserted, the top plate was very easily sunken for the hollow wall size is inaccurate. When the wall is inserted, the two wall boards are easy to crack if meeting stones; demoulding and hoisting are difficult; if the lifting point is arranged, the lifting point can only be inserted, so that the manufacturing difficulty is high, and the stress is unstable. Because the two walls are only fixed by inserting the truss ribs into the concrete, the anchoring force is very low, the transportation and hoisting processes are very easy to damage, and the repair cannot be carried out; when concrete is poured into the cavity, the mold is easy to expand; at least one surface of the inner cavity can not be provided with a rough surface, because the concrete needs to be vibrated to be compact after the two wallboards are folded, the rough surface can not be manufactured at the moment, and the concrete poured in the cavity behind is easy to be layered, which is strictly prohibited by national regulations; the cost is seriously improved because the truss ribs are added; in addition, hollow walls with insulating layers cannot be produced.

The welded steel bar mesh is turned and inserted: the double-layer reinforcing mesh sheet is manufactured, namely, the stressed reinforcing meshes of the two wall bodies are connected together to form a two-layer reinforcing cage, and the reinforcing meshes are laid in the wall plate mould. Pouring concrete, curing and forming to form the single wallboard with the exposed reinforcing mesh, namely: the stressed reinforcing mesh of the other wallboard is integrated with the wallboard. And the wallboard is turned by using a turning device, so that the surface of the wallboard where the exposed reinforcing mesh is located faces downwards and is aligned with the bottom wallboard. At the moment, the concrete is just poured into the bottom wallboard, and the reinforcing mesh of the upper wallboard is integrally inserted into the concrete of the bottom wallboard before the concrete is hardened. And curing and forming the two layers of wallboards together to finally form the hollow wall. The defects of the turnover insertion type of the welded steel bar mesh are as follows: the manufacturing process of the reinforcing mesh is complex, and the equipment investment is large (the reinforcing meshes of two walls are welded together in advance); the molding is also carried out in sequence, secondary maintenance is carried out, and energy is wasted; the forming precision is difficult to ensure, the whole piece of reinforcing mesh is inserted, and the sand blocking is difficult to reach the preset burial depth; when the folding is carried out, the upper layer plate is seriously sunken; the inner cavity can not form a rough surface; two wallboards, at least one of which can not be ribbed, because the inserted reinforcing mesh can only be smaller than the concrete range, namely the mesh can not exceed the range of the mould. In application, the connecting effect of the side wall plate is greatly reduced, namely the stressed section is lost, and the building cost is increased. In addition, hollow walls with insulating layers cannot be produced.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a prefabricated form-removal-free concrete hollow wall structure.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a prefabricated hollow wall structure of formwork concrete of exempting from to tear open, includes precast concrete single face wallboard, wall thickness stopper, exempts from to tear open the template and prevent that the mould back of the body that rises is stupefied, wherein precast concrete single face wallboard and exempt from to tear open template parallel arrangement, and through a plurality of wall thickness stopper intervals, precast concrete single face wallboard and exempt from to tear open the template through a plurality of split bolt group link joint that run through each wall thickness stopper fixed, the outside interval of exempting from to tear open the template is equipped with a plurality of templates of exempting from to tear open and prevents that the mould back of the body that rises stupefied.

Exempt from to tear open the template and exempt from to tear open the template including the middle part of a plurality of that arrange in proper order and be located the tip that a plurality of middle parts exempted from to tear open the template both ends and exempt from to tear open the template, wherein between two adjacent middle parts exempted from to tear open the template and the tip exempted from to tear open the template and the middle part and exempted from to tear open the template between all be equipped with a plurality of bolts and pass the hole, the bolt passes the hole and is used for draw bolt group to pass.

The middle disassembly-free template comprises a middle template body and a plurality of side grooves formed in the edges of the two sides of the middle template body, each side groove is of a semicircular structure, and two side grooves corresponding to two adjacent middle template bodies are enclosed to form the bolt penetrating holes.

The end disassembly-free template comprises an end template body, wherein a plurality of external openings are formed in the outer side edge of the end template body at intervals, and a plurality of internal openings are formed in the inner side edge of the end template body at intervals; the external opening is of a strip-shaped structure, and the internal opening is of a semicircular structure.

The anti-expansion mold back edges of the non-dismantling mold plates are arranged between two adjacent middle non-dismantling mold plates and at the gaps between the end non-dismantling mold plates and the middle non-dismantling mold plates.

The outer side of the precast concrete single-sided wallboard is provided with a plurality of anti-expansion die back ridges of the precast concrete single-sided wallboard, the anti-expansion die back ridges of the precast concrete single-sided wallboard correspond to the anti-expansion die back ridges of the non-dismantling template one to one, and the anti-expansion die back ridges are connected through a plurality of split bolt sets.

The anti-expansion die back ridge of the precast concrete single-sided wallboard has the same structure as the anti-expansion die back ridge of the disassembly-free template, and is of an open structure, and the opening faces the inner side.

The split bolt group comprises a split screw, a screw cap I, a gasket and a screw cap II, wherein the split screw sequentially penetrates through the precast concrete single-sided wallboard, the wall thickness limiting block and the disassembly-free template, one end of the split screw is locked through the screw cap I, and the screw cap I is accommodated in the anti-expansion mold back ridge of the precast concrete single-sided wallboard and tightly presses the anti-expansion mold back ridge of the precast concrete single-sided wallboard; the other end of the counter-pulling screw rod is locked through a gasket and a nut II, and the gasket and the nut II are accommodated in the anti-expansion die back ridge of the non-dismantling die plate and tightly press the anti-expansion die back ridge of the non-dismantling die plate.

The wall thickness limiting block is embedded in the precast concrete single-sided wallboard and is provided with a through hole for the split bolt group to pass through.

Wall body steel bars are arranged on the inner side of the precast concrete single-sided wallboard; a reinforcing mesh supported by wall steel bars is arranged on the inner side of the disassembly-free template; and a plurality of cushion blocks are arranged between the reinforcing mesh and the disassembly-free template.

The utility model has the advantages and beneficial effects that: the utility model has simple structure, parallel production of the wall boards on the two sides, simple process, low production cost, quick effect, work efficiency improvement and energy consumption reduction;

the utility model solves the problem of rough surface of the inner cavity, is better than cavity cast-in-place concrete, and eliminates the potential safety hazard of wall stress; the utility model makes the whole stress more sufficient, reduces the construction cost; the problems of cracking, mold expansion and the like can not occur before the hollow wall is poured; meanwhile, the hoisting and the transferring are convenient.

Drawings

FIG. 1 is a schematic view of a prefabricated form-removal-free concrete hollow wall structure according to the present invention;

FIG. 2 is a schematic structural view of a detachment-free form of the present invention;

FIG. 3 is a schematic structural view of the non-dismantling end formwork of the present invention;

FIG. 4 is a schematic structural view of a middle non-dismantling template in the present invention;

fig. 5 is a schematic structural view of the split bolt set of the present invention.

In the figure: 1 is precast concrete single face wallboard, 2 is the wall thickness stopper, 3 is the tip template of exempting from to tear open, 301 is the tip template body, 302 is outside opening, 303 is inside opening, 4 is the middle part template of exempting from to tear open, 401 is the middle part template body, 402 is the side fluting, 5 is to drawing the bolt group, 501 is to drawing the screw rod, 502 is nut I, 503 is the gasket, 504 is nut II, 6 is the wall cavity, 7 is the wall body reinforcing bar, 8 is to exempting from to tear open the template and prevent that the mould back of the body that rises is stupefied, 9 is precast concrete single face wallboard and prevents that the mould back of the body that rises is stupefied, 10 is the reinforcing bar net, 11 is the cushion, 12 passes the hole for the bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the utility model provides a precast form-removal-free concrete hollow wall structure, which comprises a precast concrete single-sided wall panel 1, wall thickness limit blocks 2, a removal-free formwork and a removal-free formwork anti-expansion formwork back ridge 8, wherein the precast concrete single-sided wall panel 1 and the removal-free formwork are arranged in parallel and are spaced by a plurality of wall thickness limit blocks 2, the precast concrete single-sided wall panel 1 and the removal-free formwork are connected and fixed by a plurality of split bolt groups 5 penetrating through the wall thickness limit blocks 2, a plurality of removal-free formwork anti-expansion formwork back ridges 8 are spaced outside the removal-free formwork, a wall cavity 6 is formed between the precast concrete single-sided wall panel 1 and the removal-free formwork, the wall cavity 6 is a cavity for in-situ concrete, and the embedding and overlapping of reinforcing steel bars can be freely carried out according to design requirements if the cavity is provided.

As shown in fig. 1, in the embodiment of the present invention, wall reinforcements 7 are disposed on the inner side of the precast concrete single-sided wall panel 1; the inner side of the non-dismantling formwork is provided with a reinforcing mesh 10 supported by the wall body reinforcing steel bars 7, and the reinforcing mesh 10 is firmly bound with the wall body reinforcing steel bars 7. Furthermore, a plurality of cushion blocks 11 are arranged between the reinforcing mesh 10 and the non-dismantling formwork.

Further, wall thickness stopper 2 inlays and locates in precast concrete single face wallboard 1, is equipped with the through-hole that is used for split bolt group 5 to pass on wall thickness stopper 2.

As shown in fig. 2, in the embodiment of the present invention, the detachment-free formwork includes a plurality of middle detachment-free formworks 4 and end detachment-free formworks 3 located at two ends of the plurality of middle detachment-free formworks 4, which are arranged in sequence, wherein a plurality of bolt through holes 12 are respectively disposed between two adjacent middle detachment-free formworks 4 and between the end detachment-free formworks 3 and the middle detachment-free formworks 4, and the bolt through holes 12 are used for the split bolt sets 5 to pass through.

As shown in fig. 3, in the embodiment of the present invention, the end detachment-free template 3 includes an end template body 301, the outer edge of the end template body 301 is provided with a plurality of external openings 302 at intervals, and the inner edge of the end template body 301 is provided with a plurality of internal openings 303 at intervals; the outer opening 302 is a strip structure to facilitate connection and installation of the end portions, and the inner opening 303 is a semi-circular structure.

As shown in fig. 4, in the embodiment of the present invention, the middle detachment-free formwork 4 includes a middle formwork body 401 and a plurality of side slots 402 disposed on two side edges of the middle formwork body 401, the side slots 402 are semicircular structures, and two corresponding side slots 402 of two adjacent middle formwork bodies 401 or the side slot 402 of the middle formwork body 401 and the inner opening 303 of the end formwork body 301 enclose to form the bolt passing hole 12.

In the embodiment of the utility model, the anti-expansion mold back ridges 8 of the non-dismantling mold plates are arranged between two adjacent middle non-dismantling mold plates 4 and at the gaps between the end non-dismantling mold plates 3 and the middle non-dismantling mold plates 4, and are fixed by the split bolt sets 5.

Furthermore, the outer side of the precast concrete single-sided wallboard 1 is provided with a plurality of precast concrete single-sided wallboard anti-expansion mold back ridges 9, the precast concrete single-sided wallboard anti-expansion mold back ridges 9 correspond to the disassembly-free template anti-expansion mold back ridges 8 one by one, and the precast concrete single-sided wallboard anti-expansion mold back ridges 9 and the disassembly-free template anti-expansion mold back ridges 8 are connected into a whole through a plurality of opposite pulling bolt groups 5, so that mold expansion during concrete pouring is prevented.

Specifically, the precast concrete single-sided wallboard anti-expansion mould back ridge 9 and the disassembly-free template anti-expansion mould back ridge 8 are of the same structure and are of an opening structure, and the opening faces the inner side.

As shown in fig. 5, in the embodiment of the present invention, the counter-pulling bolt group 5 includes a counter-pulling bolt 501, a nut i 502, a gasket 503 and a nut ii 504, wherein the counter-pulling bolt 501 sequentially passes through the precast concrete single-sided wall panel 1, the wall thickness limiting block 2 and the bolt through hole 12 on the non-dismantling formwork, one end of the counter-pulling bolt 501 is locked by the nut i 502, the nut i 502 is accommodated in the anti-expansion formwork back ridge 9 of the precast concrete single-sided wall panel, and compresses the anti-expansion formwork back ridge 9 of the precast concrete single-sided wall panel; the other end of the counter-pulling screw 501 is locked by a gasket 503 and a nut II 504, and the gasket 503 and the nut II 504 are accommodated in the anti-expansion die back edge 8 of the non-dismantling die plate and compress the anti-expansion die back edge 8 of the non-dismantling die plate. The split bolt group 5 firmly locks the precast concrete single-sided wallboard 1 and the disassembly-free template.

Further, the depth h of the external opening 302 of the end disassembly-free formwork 3 is determined according to the size of the anti-expansion formwork back ridge 8 of the disassembly-free formwork and the size of the anti-expansion formwork back ridge 9 of the precast concrete single-sided wallboard, namely: h should be greater than the 1/2 width of exempting from to tear open template anti-expansion mould back arris 8 or precast concrete single face wallboard anti-expansion mould back arris 9, guarantee that exempting from to tear open template anti-expansion mould back arris 8 and precast concrete single face wallboard anti-expansion mould back arris 9 have sufficient installation space.

In the embodiment of the utility model, the precast concrete single-sided wall panel 1 is made of concrete and a reinforcing steel bar system arranged in the concrete by a traditional process. The precast concrete single-sided wall panel 1 has the same size as the non-dismantling formwork, the design width is B, and the height is H, as shown in FIG. 2. The precast concrete single-sided wall board 1 corresponds to the positions of the bolt through holes in the disassembly-free template one by one. The wall thickness limiting block 2 is a concrete block with the same strength and material quality, and is firmly embedded in the precast concrete single-sided wallboard 1, the total height of the wall thickness limiting block is the design thickness of the wall body, a through hole is formed in the wall thickness limiting block, split bolts can pass in and out, and the embedding positions and the quantity of the split bolts are determined by the pre-design. The split bolt group 5 has the effect that the disassembly-free template and the prefabricated single-sided wall body are temporarily and tightly pulled and connected, and the wall body can be disassembled after cast-in-place molding and can be repeatedly used.

The utility model provides a prefabricated form-removal-free concrete hollow wall structure, which comprises the following implementation processes:

preparing a precast concrete single-sided wallboard:

according to the design drawing, at ordinary mould bench support wallboard side form, the overall dimension of well circling the wallboard, promptly: in the concrete pouring range, the side mold is generally a steel mold and is fixed on the surface of a mold table by magnetic force. According to the wallboard size, the wallboard thickness stopper point position is designed in advance, and the point position generally needs symmetrical arrangement, makes things convenient for the group to install. The point location interval is determined according to mechanical calculation, the shearing force, namely the tensile resistance, of the limiting screw is mainly considered, and standardized point distribution can be formed, if the longitudinal and transverse intervals are fixed numerical values, standardized production is facilitated. Installing a wallboard thickness limiting block, laying a reinforcing mesh sheet: according to the requirements of design drawings. If the ribs are arranged on the side faces of the wall board, namely the ribs extend out of the side dies, only the side dies are required to be provided with holes.

Laying an embedded part: the method comprises a demoulding horizontal hoisting embedded part, a wire box, a wire pipe embedded part, a hole and the like. The embedded parts are generally bound on the reinforcing mesh sheets or fixed on the surface of a formwork table, and displacement of concrete during pouring and vibrating is strictly prevented.

Pouring concrete: in the conventional method, the concrete is generally vibrated during pouring so as to ensure the compactness of the concrete. The pouring thickness is carried out according to the design requirement, the control points of the operation are a side die and a thickness control ring, and particularly, the periphery of the thickness control ring needs to be screeded and scraped, so that the precision is ensured.

Napping to form a rough surface: the roughening is performed before the concrete is solidified, and generally performed according to the concrete pre-proportioning and experience. The galling is too early, and the concrete can recover to the original shape, so that the effect cannot be achieved. The galling is too late, the concrete is solidified and cannot be carried out, and the galling depth and area are carried out according to design regulations.

Maintaining the wallboard: according to the design and standard requirements, steam curing is generally adopted to improve the efficiency.

And (3) dismantling a side die: the wallboard side die can be dismantled when the specified maintenance time is reached, the reinforcing mesh, the concrete, the embedded part and the thickness control ring of the wallboard are integrated, and the single wallboard finished product is hoisted for standby:

preparing a disassembly-free template: the non-dismantling formwork is generally an industrial finished product, such as a cement pressure plate, a cement fiber plate, a calcium silicate plate and the like. According to the size of the wallboard, cutting in blocks; and performing notching and drilling according to the designed hole position.

Assembling and forming the hollow wall: the device can be horizontally assembled and also can be vertically assembled. The split bolts are penetrated, the nuts are installed, a limit bolt group is formed, the wallboard and the non-dismantling formwork are firmly locked, meanwhile, the design precision is ensured, and the hollow wall body is formed, as shown in figure 1. The finished hollow wall generally needs to be stored and transported in an erected mode, so that space is saved, and the operation of transporting the finished hollow wall is convenient. The hanging point is positioned at the wall thickness limiting block, but the main stress is a limiting bolt, and the shearing strength (namely the diameter) of the limiting bolt is calculated and designed. In actual operation, the lifting hook can be used for directly lifting, and the carrying pole can also be used for deeply entering the cavity for lifting.

And (3) field construction and installation: the hollow wall body is in place, steel bars are bound according to design requirements, a side mold of the cast-in-place component is supported, and plugging with the hollow wall plate is performed to prevent slurry leakage; pouring concrete into the other cast-in-place members (columns or edge walls) and the cavity of the hollow wall, and vibrating; and (4) maintaining and forming, and removing the side mould, wherein the cast-in-place concrete in the hollow wall is integrated with the two layers of wall boards, and forms a vertical stress structure system of the building with the peripheral components. The limit bolt group is detached and can be reused. If the inner cavity is provided with an insulating layer, the inner cavity is required to be removed. And (5) plugging the hole opening by special slurry according to the design requirement.

The utility model has simple structure, parallel production of the wall boards on the two sides, simple process, low production cost, quick effect, work efficiency improvement and energy consumption reduction; the utility model solves the problem of rough surface of the inner cavity, is better than cavity cast-in-place concrete, and eliminates the potential safety hazard of wall stress; the utility model makes the whole stress more sufficient, reduces the construction cost; the problems of cracking, mold expansion and the like can not occur before the hollow wall is poured; meanwhile, the hoisting and the transferring are convenient.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. The utility model provides a prefabricated hollow wall structure of formwork concrete of exempting from to tear open, a serial communication port, including precast concrete single face wallboard (1), wall thickness stopper (2), exempt from to tear open the template and prevent rising mould back of the body stupefied (8), wherein precast concrete single face wallboard (1) and exempt from to tear open template parallel arrangement, and through a plurality of wall thickness stopper (2) intervals, precast concrete single face wallboard (1) and exempt from to tear open the template and connect fixedly through a plurality of split bolt groups (5) that run through each wall thickness stopper (2), the outside interval of exempting from to tear open the template is equipped with a plurality of formworks of exempting from to tear open and prevents rising mould back of the body stupefied (8).

2. The precast form-free concrete hollow wall structure according to claim 1, characterized in that the form-free form comprises a plurality of form-free forms (4) arranged in sequence at the middle part and form-free forms (3) at the two ends of the form-free forms (4) at the middle part, wherein a plurality of bolt through holes (12) are respectively arranged between two adjacent form-free forms (4) at the middle part and between the form-free forms (3) at the end part and the form-free forms (4) at the middle part, and the bolt through holes (12) are used for the split bolt sets (5) to pass through.

3. The precast form-removal-free concrete hollow wall structure as claimed in claim 2, wherein the middle form-removal-free formwork (4) comprises a middle formwork body (401) and a plurality of side open grooves (402) arranged at two side edges of the middle formwork body (401), the side open grooves (402) are of a semicircular structure, and two corresponding side open grooves (402) of two adjacent middle formwork bodies (401) enclose to form the bolt through hole (12).

4. The precast form-removal-free concrete hollow wall structure as recited in claim 2, wherein the end form-removal-free concrete hollow wall structure (3) comprises an end form body (301), the outer side edge of the end form body (301) is provided with a plurality of external openings (302) at intervals, and the inner side edge of the end form body (301) is provided with a plurality of internal openings (303) at intervals; the outer opening (302) is in a strip-shaped structure, and the inner opening (303) is in a semicircular structure.

5. The precast form-removal-free concrete hollow wall structure as claimed in claim 2, wherein the form-removal-free expansion-preventing back edges (8) are arranged at the gaps between two adjacent middle form-removal-free forms (4) and between the end form-removal-free forms (3) and the middle form-removal-free forms (4).

6. The precast formwork-free concrete hollow wall structure as claimed in claim 5, wherein a plurality of formwork-expansion-preventing back ridges (9) of the precast concrete single-sided wall panel are arranged on the outer side of the precast concrete single-sided wall panel (1), and the formwork-expansion-preventing back ridges (9) of the precast concrete single-sided wall panel and the formwork-expansion-preventing back ridges (8) of the formwork-expansion-preventing back ridges are in one-to-one correspondence and connected through a plurality of the split bolt sets (5).

7. The precast formwork-free concrete hollow wall structure as claimed in claim 6, wherein the precast concrete single-sided wallboard mold-expansion-preventing back ridge (9) and the formwork-expansion-preventing back ridge (8) have the same structure and are both of an open structure, and the opening faces to the inner side.

8. The prefabricated form-removal-free concrete hollow wall structure as claimed in claim 7, wherein the split bolt group (5) comprises a split screw (501), a nut I (502), a gasket (503) and a nut II (504), wherein the split screw (501) sequentially penetrates through the prefabricated concrete single-sided wallboard (1), the wall thickness limiting block (2) and the form-removal-free formwork, one end of the split screw is locked by the nut I (502), and the nut I (502) is accommodated in the prefabricated concrete single-sided wallboard expansion-proof formwork back ridge (9) and compresses the prefabricated concrete single-sided wallboard expansion-proof formwork back ridge (9); the other end of the counter-pulling screw rod (501) is locked through a gasket (503) and a nut II (504), the gasket (503) and the nut II (504) are accommodated in the anti-expansion die back edge (8) of the non-dismantling die plate and tightly press the anti-expansion die back edge (8) of the non-dismantling die plate.

9. The precast form-removal-free concrete hollow wall structure according to claim 1, characterized in that the wall thickness limiting block (2) is embedded in the precast concrete single-sided wallboard (1), and a through hole for the split bolt group (5) to pass through is arranged on the wall thickness limiting block (2).

10. The precast form-removal-free concrete hollow wall structure according to claim 1, characterized in that wall steel bars (7) are arranged on the inner side of the precast concrete single-sided wall panel (1); a reinforcing mesh (10) supported by wall steel bars (7) is arranged on the inner side of the non-dismantling formwork; a plurality of cushion blocks (11) are arranged between the reinforcing mesh (10) and the non-dismantling formwork.