CN214144234U

CN214144234U - Precast concrete hollow heat-insulation wall structure

Info

Publication number: CN214144234U
Application number: CN202022639565.8U
Authority: CN
Inventors: 郑永春
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-09-07
Anticipated expiration: 2030-11-16

Abstract

The utility model belongs to the technical field of the assembly type building engineering, in particular to hollow heat preservation wall structure of precast concrete. The wall structure comprises an inner leaf wallboard, a cavity reinforcing mesh, a heat insulation board, an outer leaf wallboard and connecting components, wherein the inner leaf wallboard and the outer leaf wallboard are arranged in parallel and are connected through the connecting components; the heat insulation plate is connected to the inner side surface of the outer leaf wallboard; the cavity reinforcing bar net piece sets up in the cavity between interior leaf wallboard and the outer leaf wallboard to support through coupling assembling. The utility model discloses it is small to be equipped with the investment, and it is fast to take effect, simple process, and the work efficiency promotes by a wide margin, has reduced the energy consumption, has reduced unnecessary arrangement of reinforcement in the cavity, reduces product cost.

Description

Precast concrete hollow heat-insulation wall structure

Technical Field

The utility model belongs to the technical field of the assembly type building engineering, in particular to hollow heat preservation wall structure of precast concrete.

Background

The prefabricated hollow outer wall is also called an assembled integral double-sided superposed shear wall and consists of an inner leaf wall, an outer leaf wall and a cavity, the prefabricated hollow outer wall is prefabricated and formed in a factory, connecting reinforcing steel bars are arranged in the cavity and concrete is poured on the prefabricated hollow outer wall, 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 core technical problem of the heat-insulation outer wall is as follows: firstly, the cold and heat bridge phenomenon can not be generated, and secondly, the combined structure can not be formed. In brief, the method comprises the following steps: the reinforcing steel bar passes through the heat-insulating layer, and a cold bridge and a heat bridge are generated due to overlarge difference of heat conductivity coefficients, and dew and water can be condensed and dripped indoors; the reinforcing bar zonulae occludens inside and outside leaf wallboard will form "integrated configuration", and the overall structure atress in house is participated in to the outside leaf wallboard promptly, and is synchronous with the deformation of inside leaf wallboard, can lead to the outer wall fracture this moment. The right way is to allow for a large temperature deformation of the outer leaf panels without affecting the structural forces of the inner leaf panels.

The existing hollow heat-insulating wall has the structural form and the production process:

one of the modes is a mode of turning over and inserting by using truss ribs, and the main process flow is as follows:

manufacturing a single-layer reinforcing mesh;

the reinforcing mesh is laid in the wallboard mould, and then truss ribs are laid;

pouring concrete, 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, and 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 typically about 20mm because the thickness of a single wall panel is typically only 50mm-60 mm. And curing and forming the two layers of wallboards together to finally form the hollow wall.

The technical defects of the technology of turning over and inserting 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 hollow wall is inserted in a turning mode, the upper layer plate is easy to dent, so that the hollow wall is inaccurate in size; 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 heat-insulating connecting pieces 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 the cavity is used for pouring concrete, the mold is easy to expand, the tension of the two-blade wallboard is determined by the insertion depth, and great uncertainty is generated. 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 behind the cavity is easy to be layered; and the cost is seriously improved by adding truss ribs. To sum up, two page or leaf walls are unstable each other before pouring: unstable size and unstable stress.

The other is a soil method group formula, and the main process flow is as follows:

respectively manufacturing an inner leaf wallboard and an outer leaf wallboard;

temporarily assembling the two walls by using a split bolt group;

and pouring concrete, curing and forming, and then removing the bolt group.

The technical defects of the earth method group pair formula are as follows:

the requirement on the alignment precision is high, and the alignment precision is not easy to guarantee; the manufacturing process is complex, the one-step molding is not adopted, the required area of a field is large, and the energy consumption is high. A plurality of holes on the surface of the outer blade plate need to be blocked, the process is complex, and the hidden danger of water seepage is easily caused; the operation of the outer wall surface needs to additionally set up a scaffold, and the construction cost is increased.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a precast concrete hollow thermal insulation wall structure to overcome the deficiencies of the existing structural style and production process.

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

a precast concrete hollow heat-insulation wall structure comprises an inner leaf wallboard, a cavity reinforcing mesh, a heat-insulation board, an outer leaf wallboard and connecting components, wherein the inner leaf wallboard and the outer leaf wallboard are arranged in parallel and are connected through the connecting components; the heat insulation plate is connected to the inner side face of the outer leaf wallboard; the cavity reinforcing mesh is arranged in a wall cavity between the inner leaf wallboard and the outer leaf wallboard and is supported by the connecting component.

The connecting assembly comprises an inner leaf wallboard anchoring ring, a supporting sleeve, an outer leaf wallboard anchoring ring and a split screw, wherein the inner leaf wallboard anchoring ring is embedded in the inner leaf wallboard; the outer blade wallboard anchoring ring is embedded in the outer blade wallboard; the supporting sleeve is arranged between the inner leaf wallboard anchoring ring and the outer leaf wallboard anchoring ring, and the opposite-pulling screw rods sequentially penetrate through the inner leaf wallboard anchoring ring and the supporting sleeve and then are connected with the outer leaf wallboard anchoring ring.

The inner leaf wallboard anchoring ring is of a T-shaped structure, the head end face of the inner leaf wallboard anchoring ring is coplanar with the outer surface of the inner leaf wallboard, and the tail of the inner leaf wallboard anchoring ring extends out of the inner side face of the inner leaf wallboard.

The inner leaf wallboard anchoring ring comprises a base and an inner leaf wallboard anchoring ring body vertically connected with the base, an inner cavity of the inner leaf wallboard anchoring ring body is axially arranged on the inner leaf wallboard anchoring ring body, and the outer side end of the inner cavity of the inner leaf wallboard anchoring ring body is a wedge-shaped opening.

Be equipped with interior page or leaf wallboard reinforcing bar net piece in the interior page or leaf wallboard, interior page or leaf wallboard reinforcing bar net piece lays in the top of base.

The outer leaf wallboard anchoring ring is of a T-shaped structure and comprises an outer leaf wallboard anchoring ring body and a ring wing arranged at one end of the outer leaf wallboard anchoring ring body, the other end of the outer leaf wallboard anchoring ring body is provided with an inner cavity of the outer leaf wallboard anchoring ring along the axial direction, the inner cavity of the outer leaf wallboard anchoring ring is a blind hole, and the inner wall of the outer leaf wallboard anchoring ring is provided with an internal thread;

the ring wing and the outer leaf wallboard anchoring ring body are located in the outer leaf wallboard, the end face of the other end of the outer leaf wallboard anchoring ring body is coplanar with the inner side face of the outer leaf wallboard, or the other end of the outer leaf wallboard anchoring ring body is extended out of the inner side face of the outer leaf wallboard.

Outer leaf wallboard reinforcing bar net piece has been buried underground in the outer leaf wallboard, outer leaf wallboard reinforcing bar net piece is located the inboard of ring wing.

The support sleeve comprises a pipe body and a tray arranged on the outer surface of the pipe body, a sleeve inner cavity is arranged on the pipe body along the axis, and the tray is used for supporting the cavity reinforcing mesh.

A plurality of cushion blocks are arranged between the cavity reinforcing steel bar net piece and the heat insulation plate; and a plurality of heat-insulating layer tie pieces penetrate through the heat-insulating plate.

The utility model has the advantages and beneficial effects that: the utility model provides a precast concrete hollow heat-preservation wall structure with simple structure, convenience and flexibility, low equipment investment and quick effect, which can be easily transformed by using the existing equipment; the process is simple, the work efficiency is greatly improved, the problem of secondary maintenance is solved, and the energy consumption is reduced; the unnecessary arrangement of ribs in the cavity is reduced, and the manufacturing cost of the product is reduced; the problem of rough surfaces of the inner cavity is solved, the wall body is better than cavity cast-in-place concrete, and the potential safety hazard of wall body stress is eliminated; the integral precision of the hollow wall is improved, so that the integral building can meet the requirement of beauty; the problems that the hollow wall is easy to crack and expand before being poured are solved; the hoisting and the transferring are convenient.

Drawings

FIG. 1 is a schematic view of the structure of the precast concrete hollow thermal insulation wall of the utility model;

fig. 2 is a schematic structural view of the connection assembly of the present invention;

fig. 3 is a schematic structural view of the inner leaf panel anchoring ring of the present invention;

fig. 4 is a schematic structural view of the support sleeve of the present invention;

fig. 5 is a schematic structural view of the outer leaf wall anchoring ring of the present invention.

In the figure: 1 is the split screw, 2 is interior leaf wallboard anchor ring, 201 is interior leaf wallboard anchor ring body, 202 is the wedge mouth, 203 is interior leaf wallboard anchor ring inner chamber, 204 is the base, 3 is interior leaf wallboard, 4 is interior leaf wallboard reinforcing bar net piece, 5 is the support sleeve, 501 is the body, 502 is the sleeve pipe inner chamber, 503 is the tray, 6 is the wall cavity, 7 is cavity reinforcing bar net piece, 8 is the cushion, 9 is the heated board, 10 is the heat preservation drawknot piece, 11 is exterior leaf wallboard reinforcing bar net piece, 12 is exterior leaf wallboard anchor ring, 121 is exterior leaf wallboard anchor ring body, 122 is exterior leaf wallboard anchor ring inner chamber, 123 is the fastening groove, 124 is the ring wing, 3 is the exterior leaf wallboard.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, 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 concrete hollow thermal insulation wall structure, which comprises an inner leaf wallboard 3, a cavity reinforcing mesh 7, a thermal insulation board 9, an outer leaf wallboard 13 and connecting components, wherein the inner leaf wallboard 3 and the outer leaf wallboard 13 are arranged in parallel and connected through the connecting components; the heat insulation plate 9 is connected to the inner side surface of the outer leaf wallboard 13; the cavity reinforcing mesh 7 is arranged in the wall cavity 6 between the inner leaf wallboard 3 and the outer leaf wallboard 13 and is supported by the connecting component.

As shown in fig. 2, in the embodiment of the present invention, the connection assembly includes an inner leaf wallboard anchoring ring 2, a support sleeve 5, an outer leaf wallboard anchoring ring 12 and a split screw 1, wherein the inner leaf wallboard anchoring ring 2 is embedded in an inner leaf wallboard 3; the outer leaf wallboard anchoring ring 12 is embedded in the outer leaf wallboard 13; the supporting sleeve 5 is arranged between the inner leaf wallboard anchoring ring 2 and the outer leaf wallboard anchoring ring 12, and the opposite-pulling screw rods 1 sequentially penetrate through the inner leaf wallboard anchoring ring 2 and the supporting sleeve 5 and then are connected with the outer leaf wallboard anchoring ring 12.

As shown in fig. 3, in the embodiment of the present invention, the inner leaf wall plate anchoring ring 2 is a T-shaped structure, the head end face of which is coplanar with the outer surface of the inner leaf wall plate 3, and the tail is extended from the inner side face of the inner leaf wall plate 3.

Specifically, the inner leaf wallboard anchoring ring 2 comprises a base 204 and an inner leaf wallboard anchoring ring body 201 vertically connected with the base 204, an inner leaf wallboard anchoring ring inner cavity 203 is axially arranged on the inner leaf wallboard anchoring ring body 201, the inner leaf wallboard anchoring ring inner cavity 203 is used for inserting the counter-pulling screw rod 1, the outer side end of the inner leaf wallboard anchoring ring inner cavity 203 is a wedge-shaped opening 202, the head of the counter-pulling screw rod 1 is accommodated in the wedge-shaped opening 202, and axial limiting can be carried out on the counter-pulling screw rod 1. Preferably, the base 204 is of one-piece construction with the inner panel anchoring ring 201, the base 204 being of a tapered construction.

In this embodiment, the inner leaf wallboard anchoring ring 2 is made of hard materials such as plastics and ceramics, is poured together with the inner leaf wallboard 3 and is permanently embedded in the inner leaf wallboard 3, and the inner leaf wallboard anchoring ring 2 plays a role in limiting, supporting and protecting.

As shown in fig. 1, in the embodiment of the present invention, an inner leaf wallboard reinforcing mesh sheet 4 is provided in the inner leaf wallboard 3, and the inner leaf wallboard reinforcing mesh sheet 4 is laid on the top of the head of the inner leaf wallboard anchoring ring 2, i.e. on the top of the base 204. The height of the base 204 is the thickness of the protective layer of the inner leaf wallboard reinforcing mesh 4. The inner leaf wallboard anchoring ring 2 is used for fixing and protecting the counter-pull screw rod 1, connecting the limiting support sleeve 5, simultaneously serving as a protective layer cushion block of the inner leaf wallboard reinforcing steel mesh 4, and working with the counter-pull screw rod 1 to increase the tensile (anchoring) force.

As shown in fig. 5, in the embodiment of the present invention, the outer leaf wall plate anchoring ring 12 is a T-shaped structure, the outer leaf wall plate anchoring ring 12 includes an outer leaf wall plate anchoring ring body 121 and a ring wing 124 disposed at one end of the outer leaf wall plate anchoring ring body 121, the other end of the outer leaf wall plate anchoring ring body 121 is provided with an outer leaf wall plate anchoring ring inner cavity 122 along the axial direction, the outer leaf wall plate anchoring ring inner cavity 122 is a blind hole, and an inner thread is disposed on the inner wall; the split screw 1 is in threaded connection with the inner cavity 122 of the outer leaf wallboard anchoring ring.

In this embodiment, the ring wing 124 and the outer leaf panel anchoring ring body 121 are embedded inside the outer leaf panel 13, and the end surface of the other end of the outer leaf panel anchoring ring body 121 is coplanar with the inner side surface of the outer leaf panel 13, or the other end of the outer leaf panel anchoring ring body 121 extends out of the inner side surface of the outer leaf panel 13.

Specifically, the ring wings 124 and the outer panel anchor ring 121 are of a one-piece construction. The outer leaf wallboard anchoring ring 12 is made of high-strength materials such as metal, ceramic, plastic and the like, is a thick-walled circular tube with wings, and is permanently poured into the outer leaf wallboard 13. The outer leaf wallboard anchoring ring body 121 plays a role in protecting the counter-pulling screw rod 1 besides supporting and limiting, and mainly prevents the counter-pulling screw rod 1 from being difficult to disassemble together with concrete pouring; the screw thread is sleeved in the inner cavity 122 of the outer leaf wallboard anchoring ring, so that the temporary locking with the counter-pulling screw rod 1 is ensured, and the convenience in disassembly and assembly is realized;

as shown in fig. 1, in the embodiment of the present invention, the outer leaf wallboard reinforcing mesh sheet 11 is laid in the outer leaf wallboard 13, and the outer leaf wallboard reinforcing mesh sheet 11 is located inside the ring wing 124 of the outer leaf wallboard anchoring ring 12. The ring wing 124 is arranged on the outer side of the outer leaf wallboard reinforcing mesh piece 11 and hooks the outer leaf wallboard reinforcing mesh piece 11, so that the anchoring force is increased. The main functions of the outer leaf panel anchoring ring 12 are: temporarily fixing and protecting the counter-pulling screw rod 1; the supporting sleeve 5 is connected to ensure the wall precision; the ring wings 124 enhance the anchoring force; the outer leaf wallboard anchoring ring 12 and the opposite-pulling screw rod 1 work cooperatively to increase the tensile (anchoring) force.

As shown in fig. 4, in the embodiment of the present invention, the supporting sleeve 5 includes a tube 501 and a tray 503 disposed on the outer surface of the tube 501, and the tray 503 is used for supporting the cavity reinforcing mesh 7. The tube body 501 is provided with a sleeve inner cavity 502 along the axial line, and the split screw 1 passes through the sleeve inner cavity 502.

The support sleeve 5 is made of a high-strength material, such as metal, plastic, etc., and has corresponding compression and shear strengths. The pipe body 501 is made of high-strength material, the diameter of the pipe body is determined according to mechanical calculation, and the length of the pipe body is determined according to comprehensive indexes of the heat-insulating wall. The bushing inner cavity 502 is a passage for the counter-pull screw 1 while protecting the counter-pull screw 1 from the cast-in-place concrete. Tray 503 drags cavity reinforcing bar net piece 7 in the wall body cavity 6 for cavity reinforcing bar net piece 7, heated board 9 and outer leaf wallboard reinforcing bar net piece 11 form an overall stable platform of lifting, make things convenient for the concrete placement of outer leaf wallboard 13.

The main functions of the support sleeve 5 are: when the outer leaf wallboard 13 is prefabricated in a factory, a prefabricated lifting platform of the outer leaf wallboard 13 is formed. Controlling the thickness of the cavity of the wall; according to different design requirements, the lengths of the support sleeves 5 are customized to ensure the accuracy of the thickness of the wall cavity 6. The support sleeve 5 protects the counter-pull screw rod 1 from being influenced by concrete pouring, and simultaneously serves as a lifting point and works simultaneously with the counter-pull screw rod 1. The support sleeve 5 is made of plastic and other materials, and when passing through the heat insulation board 9, a cold bridge and a heat bridge cannot be formed due to the fact that the heat conductivity coefficient of the support sleeve is close to that of the heat insulation layer material.

As shown in fig. 1, on the basis of the above embodiment, a plurality of cushion blocks 8 are arranged between the cavity reinforcing mesh 7 and the heat insulation board 9; a plurality of insulating layer tie pieces 10 penetrate through the insulating board 9.

The counter-pulling screw rod 1 comprises a screw rod which is made of high-strength material, the diameter of the screw rod is determined according to mechanical calculation, and the length of the screw rod is determined according to comprehensive indexes of the heat-insulating wall. The head of the screw is provided with a wedge-shaped nut which is embedded in a wedge-shaped opening 202 of an inner cavity 203 of the inner leaf wallboard anchoring ring during working and cooperates with the inner leaf wallboard anchoring ring 2 embedded in the inner leaf wallboard 3 when being subjected to tensile force. The end face of the wedge-shaped screw cap is provided with a fastening groove which is used when the screw is detached. The tail part of the screw rod is provided with a mantle fiber end which is used for connecting and locking with the outer leaf wallboard anchoring ring 12.

Specifically, the counter-pulling screw 1 is made of high-strength material, such as metal, plastic, etc., and has corresponding tensile, compressive and shear strengths. The hollow wall has the advantages that the two wallboards are temporarily fixed to form the hollow wall, the limit screw is detached and reused after the hollow wall is constructed (namely, the cavity is filled with concrete and meets the design strength requirement). The screw rod is also used as a hollow wall body hoisting point. The main functions of the counter-pulling screw 1 are: guarantee the integral stability of inside and outside leaf wallboard among the prefabrication process: the hollow heat-insulating wall body forms a stable whole body through the pulling and pressing structure.

A construction process of a precast concrete hollow heat-insulation wall structure comprises the following steps:

1) preparing an inner leaf wallboard 3:

fixing an inner leaf wallboard anchoring ring 2 at a preset position on the surface of the mould table;

the method specifically comprises the following steps: 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 size of the wallboard, point positions of the inner leaf wallboard anchoring ring 2 are designed in advance, and are generally symmetrically arranged, so that the hoisting and the installation are convenient; the point location interval is determined according to mechanical calculation, the shearing force, namely the tensile resistance, of the opposite-pulling screw rod 1 is mainly considered, and standardized point distribution can be formed, if the longitudinal and transverse intervals are fixed numerical values, standardized production is facilitated.

The opposite-pulling screw rod 1 penetrates through the inner leaf wallboard anchoring ring 2; the method specifically comprises the following steps: the opposite-pulling screw rod 1 penetrates through the inner leaf wallboard anchoring ring 2 and is fixed on a designated point, and is fixed on the surface of the die table by a magnetic box or fixed in a screw mode; because the base 204 is a horizontal inverted horn mouth, the fixing and wallboard demoulding are convenient.

Laying an inner-leaf wallboard reinforcing steel mesh 4 and an embedded part; the method specifically comprises the following steps: according to the requirements of design drawings, if ribs are arranged on the side faces of the wall board, namely the reinforcing steel bars extend out of the side molds, holes are formed in the side molds; laying an embedded part: comprises a wire box, a wire tube 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; during pouring, the concrete is generally vibrated to ensure compactness, the pouring thickness is carried out according to the design requirement, the control points of operation are a side die and a thickness control ring (base 204), and particularly, the periphery of the thickness control ring needs to be smoothed and scraped to ensure the precision.

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, the concrete can be restored to the original state, and 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.

2) Laying a cavity reinforcing steel mesh 7:

sleeving a support sleeve 5 on the opposite-pulling screw rod 1 and tightly propping against the inner leaf wallboard anchoring ring 2;

laying the cavity reinforcing steel bar net 7 on the tray 503 of the support sleeve 5 and firmly binding with the support sleeve 5;

a cushion block 8 is laid above the cavity reinforcing mesh 7;

3) laying an insulation board 9: laying the insulation board 9 above the cushion block 8;

the method specifically comprises the following steps: the heat insulation plate 9 is a soft block-shaped body, and holes need to be formed in corresponding positions when the heat insulation plate meets the supporting sleeve 5. Before the insulation board 9 is laid, the insulation board tie pieces 10 need to be inserted according to design requirements: the specification and the arrangement distance of the heat insulation plate drawknot members 10 are strictly set according to the calculation requirements. Too large and dense arrangement easily causes too strong constraint to become a combined structure, and the outer leaf wall is cracked; if the arrangement is too small and too sparse, the outer blade plates will deform and fall off.

Finishing of the heat insulation board 9: mainly blocks the gap and avoids cold bridge. Laminating the heat insulation plate: to ensure that no grout leaks when the concrete of the outer leaf wall panel 13 is poured.

4) Preparing an outer leaf wallboard 13:

supporting an outer blade wallboard side mold according to the requirement of a design drawing;

laying an outer-leaf wallboard reinforcing mesh 11 and a cushion block 8, and placing an embedded part;

connecting the outer leaf wallboard anchoring ring 12 with the opposite-pulling screw rod 1 through threads; at this point, the tension rod 1 is completely protected, i.e. the concrete casting does not affect its free movement. Meanwhile, the outer leaf wallboard concrete is solidified to form a whole with the outer leaf wallboard anchoring ring 12, and the opposite-pulling screw rod 1 plays roles of tensile, limiting and the like.

Pouring concrete, and trowelling (or paving outer surface of wall body-ceramic tile and face brick);

5) maintaining; demolding again: the die table is inclined, and demolding is carried out by taking the top counter-pulling screw rod 1 as a lifting point, so that the method is simple and safe;

6) hoisting, storing and transporting; 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 hoisting point is at the position of the support sleeve 5, but the main stress is the counter-pulling screw rod 1, and the shear strength (namely the diameter) is designed by calculation. 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.

7) Performing field construction and installation; the method specifically comprises the following steps: 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; other cast-in-place components (columns or edge walls) and the hollow cavity of the hollow wall are cast with concrete and vibrated; and (4) removing the side mould after curing and forming, 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.

8) And (4) dismantling the counter-pulling screw rod 1 and plugging the through-wall hole. The split screw 1 can be disassembled and reused. The opposite-pulling screw rods 1 are strong constraint rod pieces and must be removed, otherwise the heat-insulating wall body forms a combined structure, and the outer leaf wallboard is easy to crack.

Plugging a through-wall hole: after the opposite-pulling screw rod 1 is pushed out, a hole is formed in the inner side of the wall body and must be plugged, otherwise, the heat-insulating performance of the wall body is easily reduced. The position of the heat preservation layer must be sealed by materials close to the heat preservation layer. (such as cut heat preservation strips, or foamed polyurethane and the like), and other positions in the hole can be blocked by materials such as mortar and the like.

The mould rises when preventing cast in situ concrete: when the prefabricated hollow heat-insulating wall is cast in place, the expansion die is easily caused, namely: the pressure of the liquid concrete is overlarge to expand the prefabricated wall boards of the inner leaf and the outer leaf. Through strict calculation, after the connecting components are arranged at certain intervals, the hidden danger of mold expansion can be completely eliminated. When the factory is prefabricated, the opposite-pulling screw rod 1 is a supporting point of the heat-insulating layer and the outer leaf wallboard: the counter-pulling screw rod 1 is made of high-strength material, and the bearing capacity requirement of the upper construction load is completely met through point distribution calculation. The opposite-pulling screw rod 1 is also used as a lifting point: when the wall body is lifted (demoulded, transported and installed), the shearing resistance of the wall body meets the requirement of the lifting force through calculation. The counter-pulling screw rod 1 is a component which can be repeatedly used: after the hollow heat-insulating wall body is cast in situ and the integral strength is formed, the split screw rod 1 can be detached and reused.

The above description is only for the 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 all included in the protection scope of the present invention.

Claims

1. The precast concrete hollow heat-insulation wall structure is characterized by comprising an inner leaf wallboard (3), a cavity reinforcing mesh (7), a heat-insulation board (9), an outer leaf wallboard (13) and connecting components, wherein the inner leaf wallboard (3) and the outer leaf wallboard (13) are arranged in parallel and are connected through the connecting components; the heat insulation plate (9) is connected to the inner side face of the outer leaf wallboard (13); the cavity reinforcing steel mesh (7) is arranged in the wall cavity (6) between the inner leaf wallboard (3) and the outer leaf wallboard (13) and is supported by the connecting assembly.

2. The precast concrete hollow thermal insulation wall structure according to claim 1, wherein the connection assembly comprises an inner leaf wallboard anchoring ring (2), a support sleeve (5), an outer leaf wallboard anchoring ring (12) and a split screw (1), wherein the inner leaf wallboard anchoring ring (2) is embedded in the inner leaf wallboard (3); the outer leaf wallboard anchoring ring (12) is embedded in the outer leaf wallboard (13); the supporting sleeve (5) is arranged between the inner leaf wallboard anchoring ring (2) and the outer leaf wallboard anchoring ring (12), and the counter-pulling screw rod (1) sequentially penetrates through the inner leaf wallboard anchoring ring (2) and the supporting sleeve (5) and then is connected with the outer leaf wallboard anchoring ring (12).

3. The precast concrete hollow thermal insulation wall structure according to claim 2, wherein the inner leaf panel anchoring ring (2) is a T-shaped structure, the head end face of which is coplanar with the outer surface of the inner leaf panel (3), and the tail of which is extended from the inner side face of the inner leaf panel (3).

4. The precast concrete hollow thermal insulation wall structure according to claim 3, wherein the inner leaf wallboard anchoring ring (2) comprises a base (204) and an inner leaf wallboard anchoring ring body (201) vertically connected with the base (204), an inner leaf wallboard anchoring ring inner cavity (203) is axially arranged on the inner leaf wallboard anchoring ring body (201), and the outer side end of the inner leaf wallboard anchoring ring inner cavity (203) is a wedge-shaped opening (202).

5. The precast concrete hollow thermal insulation wall structure according to claim 4, characterized in that a leaf wallboard reinforcing mesh (4) is arranged in the leaf wallboard (3), and the leaf wallboard reinforcing mesh (4) is laid above the base (204).

6. The precast concrete hollow thermal insulation wall structure according to claim 2, wherein the outer leaf panel anchoring ring (12) is of a T-shaped structure, the outer leaf panel anchoring ring (12) comprises an outer leaf panel anchoring ring body (121) and a ring wing (124) arranged at one end of the outer leaf panel anchoring ring body (121), the other end of the outer leaf panel anchoring ring body (121) is provided with an outer leaf panel anchoring ring inner cavity (122) along the axial direction, the outer leaf panel anchoring ring inner cavity (122) is a blind hole, and an inner thread is arranged on the inner wall;

the ring wings (124) and the outer leaf wallboard anchoring ring body (121) are located in the outer leaf wallboard (13), the end face of the other end of the outer leaf wallboard anchoring ring body (121) is coplanar with the inner side face of the outer leaf wallboard (13), or the other end of the outer leaf wallboard anchoring ring body (121) is extended out of the inner side face of the outer leaf wallboard (13).

7. The precast concrete hollow thermal insulation wall structure according to claim 6, wherein an outer leaf wallboard reinforcing mesh (11) is buried in the outer leaf wallboard (13), and the outer leaf wallboard reinforcing mesh (11) is positioned on the inner side of the ring wing (124).

8. The precast concrete hollow thermal insulation wall structure according to claim 2, characterized in that the support sleeve (5) comprises a pipe body (501) and a tray (503) arranged on the outer surface of the pipe body (501), a sleeve inner cavity (502) is arranged on the pipe body (501) along the axis, and the tray (503) is used for supporting the cavity reinforcing mesh (7).

9. The precast concrete hollow thermal insulation wall structure according to claim 1, characterized in that a plurality of cushion blocks (8) are arranged between the cavity reinforcing mesh (7) and the thermal insulation plate (9); a plurality of heat preservation layer tie pieces (10) penetrate through the heat preservation plate (9).