Light ribbed thermal insulation wall structure filled with hollow building blocks

Abstract

The invention relates to the technical field of building wall structures, in particular to a light ribbed thermal insulation wall structure filled with hollow building blocks, which comprises a framework formed by ribbed beams and ribbed columns integrally poured by ceramsite concrete and internally provided with steel bars, and the ribbed columns comprise T-shaped side ribbed columns and cross-shaped inner ribbed columns; prefabricated hollow building blocks are filled in the rib grids, each building block is composed of an EPS heat preservation material inner core and a straw ceramsite concrete shell, and grooves matched with the rib beams are formed in the upper surface and the lower surface of each building block so as to be clamped and engaged with the rib beams after pouring; at least one light insulation board serves as an outer formwork and is integrally poured with the frame, rectangular grooves with the same number as the inner rib columns are formed in the insulation board, and connecting steel bars are arranged in the rectangular grooves, so that the inner rib columns form a cross-shaped section during pouring and are stably connected with the insulation board. The hollow building blocks and the light heat preservation plates form a three-layer heat preservation structure in the wall thickness direction. According to the structure, heat preservation and load bearing are integrated, the out-of-plane rigidity, bending resistance and shear resistance of the wallboard are improved, heat bridges are reduced, and factory prefabrication is facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building wall structure, and particularly relates to a light ribbed heat preservation wall structure filled with hollow blocks. BACKGROUND

[0002] At present, the building wall structure technology is developing towards light weight, high strength and energy saving. On the one hand, with the acceleration of urbanization and the increasing shortage of land resources, there are more and more high-rise buildings, which puts forward higher requirements on the weight and strength of wall materials. On the other hand, the state attaches more and more importance to building energy saving, and the relevant standards and specifications are becoming more and more strict, and the heat preservation performance of the wall becomes a key indicator to evaluate the effect of building energy saving. Therefore, developing a wall structure with light weight, high strength, excellent heat preservation performance and convenient construction is an inevitable choice to adapt to the development trend of building wall structure technology. Some existing dense rib composite wall structures have some deficiencies in practical application. The filling body mainly uses foam board with light weight, which cannot play a role in wall bearing, and the connection between the filling body and the wall is weak, which is easy to separate from the frame. Moreover, it is easy to float or move when placed and poured in the formwork, which affects the pouring quality of the wall. Under the action of external force, the dense rib composite wall may be out of stability and damaged under the action of axial compression due to insufficient out-of-plane stiffness. Patent CN108951938A proposes a heat preservation dense rib wall: a grid composed of concrete rib beams and rib columns, and the grid is filled with light modules; the heat preservation board is directly embedded in the rib beam or rib column, and the through hole in the board is anchored with the upper and lower rib beams / rib columns by the connecting body (steel bar or concrete), which ensures that the board does not fall off and realizes the integration of the heat preservation layer and the structure. However, the wallboard has many nodes and complex formwork when it is made, and the through hole and the connecting body occupy the cross section when the heat preservation board is embedded in the rib beam / rib column, which reduces the effective compression zone height and reduces the bending and shear bearing capacity of the rib part, especially under large span or high load. Patent CN117166673A proposes a "three anti-seismic defense lines" assembled self-insulation dense rib concrete wallboard: two sides of non-reinforced fiber fabric panel + longitudinal and transverse rib + steel reinforced concrete edge beam column, and the cavity is filled with rock wool / foam board. The three defense lines are panel, rib frame and edge beam column in turn, which has better energy dissipation and ductility than masonry, light weight, good heat preservation and full prefabrication. However, the non-reinforced rib has low ultimate bearing capacity, and the panel has weak impact resistance, which is only suitable for low multi-story buildings. Moreover, the edge beam column and the longitudinal and transverse ribs are all made of concrete (or ceramsite concrete), forming a continuous rigid skeleton, which becomes a significant thermal bridge, reducing the overall heat preservation effect. Therefore, designing a wall structure with light weight, high strength, excellent heat preservation performance and convenient construction has become a technical problem to be solved by the technical personnel in the field. SUMMARY

[0003] This invention provides a lightweight ribbed insulated wall structure with hollow blocks inside. Through the frame construction of "T-shaped cross section of the side rib column + cross-shaped cross section of the inner rib column", combined with the integrated casting method of "hollow blocks with upper and lower grooves and rib beams interlocking" and "lightweight insulation board as outer formwork with rectangular grooves and built-in connecting steel bars", a three-layer insulation system is constructed along the wall thickness direction. While ensuring the outward stiffness, bending resistance and shear bearing capacity of the wall panel, the stability of the insulation connection is improved and the thermal bridging effect is reduced.

[0004] To achieve the above objectives, the wall structure of the present invention includes: a load-bearing frame composed of rib beams and rib columns integrally cast with expanded clay concrete and reinforced with internal steel bars, wherein the rib columns include T-shaped side rib columns and cross-shaped inner rib columns; precast hollow blocks filled within the rib grid, each hollow block including an EPS insulation material core and a straw expanded clay concrete shell covering it, and grooves formed on its upper and lower surfaces to cooperate with the rib beams for interlocking after casting; at least one lightweight insulation board as an outer formwork integrally cast with the frame, the lightweight insulation board having rectangular grooves of the same number as the inner rib columns and internal connecting steel bars, so that the inner rib columns form a cross-shaped cross section and are stably connected to the lightweight insulation board during casting, thereby forming a three-layer insulation structure together with the hollow blocks.

[0005] Preferably, the edge ribs are equipped with no less than four longitudinal ribs and rib stirrups, and the middle ribs are equipped with no less than two longitudinal ribs and rib stirrups; the rib columns are equipped with no less than eight longitudinal ribs and rib stirrups; the longitudinal ribs, rib columns and connecting steel bars are made of HRB400, and the rib stirrups and rib column stirrups are made of HPB300 to ensure the load-bearing and ductility requirements.

[0006] Preferably, the lightweight insulation board is a foamed cement insulation board, with a rectangular groove width of 1 / 4 of the wall panel thickness and a depth of 1 / 2 of the insulation board thickness, and the connecting steel bar length is twice the width of the rectangular groove; the hollow block shell thickness is 1 / 5 of the hollow block thickness, and the upper and lower groove depths are twice the shell thickness, to ensure the reliability of the interlocking joint and the insulation-structure coupling effect.

[0007] The beneficial effects of this invention are:

[0008] 1. In this invention, the cross-sectional shape of the wall edge ribs is T-shaped, and the cross-sectional shape of the inner ribs is cross-shaped. The reinforcing steel bars are arranged according to rules, which can effectively improve the out-of-plane stiffness and bending and shear resistance of the wall panel. The lightweight insulation board is poured together with the wall, which can not only serve as the wall formwork, but also form a stable connection with the wall panel, making construction convenient.

[0009] 2. The EPS insulation material is combined with the straw-based ceramsite concrete shell to form a composite insulation layer. This not only improves the strength of the insulation layer but also increases the weight of the infill. The presence of the straw-based ceramsite concrete shell prevents the hollow blocks from floating or moving during wall pouring, making construction easier and conforming to the concept of lightweight, green, and environmentally friendly materials. Furthermore, during wall pouring, the ribs interlock with the hollow blocks through the grooves on the upper and lower surfaces, resulting in a more stable connection.

[0010] 3. Both the hollow blocks and the walls are prefabricated in the factory. The hollow blocks are cast in specially made wooden block molds, which facilitates molding and demolding, and can be reused, simplifying the construction process, reducing construction steps, and improving construction efficiency. In addition, the hollow blocks and lightweight insulation boards together form a three-layer insulation structure, which reduces the formation of thermal bridges and makes it more energy-efficient and environmentally friendly. Attached Figure Description

[0011] Figure 1 A three-dimensional schematic diagram of a lightweight ribbed thermal insulation wall structure with internally filled hollow blocks;

[0012] Figure 2 A three-dimensional schematic diagram of the wall panel components after disassembly;

[0013] Figure 3 Basic reinforcement diagram of the wall panel;

[0014] Figure 4 Figure 3 The AA section view shows the reinforcement of the wall panel along the AA section;

[0015] Figure 5 Figure 3 The BB section view shows the reinforcement of the wall panel along the BB section;

[0016] Figure 6 A three-dimensional schematic diagram of the hollow blocks filling the wall panel, showing in detail the composition of the hollow blocks;

[0017] Figure 7 A three-dimensional schematic diagram of a detachable wooden block template used to make hollow blocks;

[0018] The codes in the attached diagram are: 1-rib beam; 11-rib beam longitudinal reinforcement; 12-rib beam stirrup; 2-rib column; 21-edge rib column; 22-inner rib column; 201-rib column longitudinal reinforcement; 202-rib column stirrup; 3-hollow block; 31-EPS insulation material; 32-straw ceramsite concrete shell; 4-lightweight insulation board; 41-connecting reinforcement; 42-rectangular groove; 5-wooden block formwork; 51-fixture; 52-baffle; 53-base. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] As shown in the figure, the wall panel of the present invention adopts a frame-type rib beam-rib column as the load-bearing skeleton, the side rib column adopts a T-shaped section, the inner rib column adopts a cross-shaped section, and is integrally cast by using lightweight insulation board and hollow blocks as part of the template to form a stable connection and a three-layer insulation structure.

[0021] The reinforcement configuration in the rib beams and rib columns is as follows: the edge rib beams shall be provided with no less than four longitudinal bars and stirrups, the middle rib beams shall be provided with no less than two longitudinal bars and stirrups; the rib columns shall be provided with no less than eight longitudinal bars and stirrups; among them, the longitudinal load-bearing bars and connecting bars shall be HRB400, and the stirrups shall be HPB300, so as to take into account both load-bearing capacity and ductility requirements.

[0022] The lightweight insulation board is preferably a foamed cement insulation board. The board has pre-embedded connecting steel bars and rectangular grooves are set according to the number of inner ribs, so that the inner ribs maintain a cross-shaped cross section after pouring and are reliably anchored to the insulation board.

[0023] The width of the rectangular groove on the lightweight insulation board is one-quarter of the wall panel thickness, and the depth of the rectangular groove is half the thickness of the lightweight insulation board.

[0024] The length of the connecting steel bar 41 inside the lightweight insulation board 4 is at least twice the width of the rectangular groove 42.

[0025] The hollow blocks adopt a composite structure of EPS core and straw ceramsite concrete shell, with the shell thickness being 1 / 5 of the block thickness. The upper and lower surfaces of the blocks are provided with grooves that cooperate with the ribs. The groove depth is twice the shell thickness, so that after pouring, the blocks can be interlocked with the ribs to prevent them from floating and shifting during the pouring process, thereby improving construction quality and molding stability. The lightweight insulation board and the hollow blocks together form a three-layer insulation structure along the wall thickness direction, reducing the location of thermal bridges.

[0026] The preferred hollow block manufacturing process is as follows: A detachable wooden block template is used, which includes a base and a pluggable baffle. The segmented EPS is placed in the corresponding position on the base, and a fixing device is installed on the baffle. A weight can be applied to the top surface of the fixing device to press and position the EPS and the baffle. Then, straw ceramsite concrete is poured. After the basic molding is completed, the fixing device and the baffle are removed in sequence, and the molded block is separated from the base to achieve convenient demolding and reuse.

[0027] The above structure improves the out-of-plane stiffness and bending and shear bearing capacity of the wall panel through the collaborative design of "rib column section optimization + block snap-fit ​​+ insulation board groove anchoring", while forming a stable integrated insulation connection and reducing thermal bridge positions, thus meeting the comprehensive performance requirements of lightweight, high strength and energy saving.

[0028] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of this invention.

Claims

1. A lightweight ribbed insulated wall structure filled with hollow blocks, comprising a frame structure consisting of rib beams and rib columns integrally cast from expanded clay concrete and reinforced with internal steel bars, wherein the rib columns include T-shaped side rib columns and cross-shaped inner rib columns; multiple precast hollow blocks are filled within the rib grid formed by the rib beams and rib columns, each hollow block comprising an EPS insulation material core and a straw expanded clay concrete shell covering it, and the upper and lower surfaces of the hollow blocks are provided with grooves that mate with the rib beams to form a snap-fit ​​connection with the rib beams after casting; at least one lightweight insulation board serves as an outer formwork and is integrally cast with the frame structure, the lightweight insulation board having rectangular grooves of the same number as the inner rib columns and containing internal connecting steel bars, so that the inner rib columns form a cross-shaped cross section and form a stable connection with the lightweight insulation board during casting; the lightweight insulation board and the hollow blocks together constitute a three-layer insulation structure along the wall thickness direction.

2. The wall structure according to claim 1, wherein: The ribs located at the edge of the wall panel are provided with no less than four longitudinal ribs and rib stirrups, and the ribs located in the middle of the wall are provided with no less than two longitudinal ribs and rib stirrups; the ribs are provided with no less than eight longitudinal ribs and rib stirrups, and the longitudinal ribs, ribs, and connecting steel bars are hot-rolled ribbed HRB400 steel bars, and the rib stirrups and rib stirrups are hot-rolled plain HPB300 steel bars.

3. The wall structure according to claim 1, wherein: The width of the rectangular groove on the lightweight insulation board is 1 / 4 of the wall panel thickness, the depth of the rectangular groove is 1 / 2 of the lightweight insulation board thickness, and the length of the connecting steel bar is not less than twice the width of the rectangular groove.

4. The wall structure according to claim 1, wherein: The thickness of the straw-ceramic concrete outer shell of the hollow block is 1 / 5 of the thickness of the hollow block, and the depth of the grooves on the upper and lower surfaces is twice the thickness of the outer shell.

5. The wall structure according to any one of claims 1 to 4, wherein: The hollow blocks are made using a detachable wooden block template. The template includes a base and a pluggable baffle. Fixers can be installed on the baffle to apply pressure to position the EPS insulation material and the baffle. Straw-based ceramsite concrete is poured into the template cavity, and the hollow blocks are demolded and removed after molding.

6. The wall structure according to claim 1, wherein: The lightweight insulation board is a foamed cement insulation board and is used as an outer formwork in the pouring process. It forms a stable connection with the inner rib column through the rectangular groove and the built-in connecting steel bars.

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