Engineering bamboo composite shear wall and construction method thereof

Abstract

The invention discloses an engineering bamboo composite shear wall which comprises an engineering bamboo shear wall body, steel connecting pieces corresponding to the joints of all floors are arranged at the two ends of the engineering bamboo shear wall body, the steel connecting pieces are provided with anchoring parts, and prestress tensioning pieces are arranged on the outer side of the engineering bamboo shear wall body. The pre-stress tensioning part is connected with the anchoring part in a matched mode, a pre-stress adjusting part is arranged on the pre-stress tensioning part, and the pre-stress tensioning part applies vertical pre-compression to the engineering bamboo shear wall body through adjustment of the pre-stress adjusting part, so that pre-compression of the engineering bamboo shear wall body is completed. The anchoring component is integrated on the floor steel connecting piece, and is matched with the outer side prestress tensioning piece and the adjusting component to apply vertical pre-compression to the shear wall body to realize pre-compression, so that the vertical rigidity, the compression bearing capacity and the deformation resistance of the engineering bamboo shear wall can be remarkably improved.

Description

Technical Field

[0001] This application relates to the technical field of building components, and in particular to an engineered bamboo composite shear wall and its construction method. Background Technology

[0002] With the rapid development of green building and prefabricated building, engineered bamboo is widely used in the field of building structure due to its advantages of being renewable, having a high strength-to-weight ratio, and being low-carbon and environmentally friendly. As the core enclosure and load-bearing component in a building, engineered bamboo shear wall plays an important role in resisting lateral displacement and transmitting vertical loads. Its structural performance directly affects the overall stability and safety of the building.

[0003] Existing engineered bamboo shear walls typically consist of the bamboo shear wall body and steel connectors fixed to the body at the corresponding floor connections. These steel connectors are primarily used to connect the shear wall to external building components such as floor beams, ensuring the reliability of the connection between the shear wall and the overall building structure. However, engineered bamboo itself has inherent defects such as large compressive deformation, significant residual deformation, and insufficient stiffness. Existing engineered bamboo shear walls rely solely on the strength of the bamboo itself and the connection effect of the steel connectors to bear the load. Over long-term use, this can easily lead to problems such as wall cracking, loose joints, and excessive vertical deformation, severely affecting the load-bearing capacity and service life of the shear wall.

[0004] Therefore, in response to the technical problems of existing engineering bamboo shear walls, such as insufficient stiffness, large deformation under pressure, and limited application scope, there is an urgent need for an engineering bamboo composite shear wall that can strengthen the structure, improve structural performance, and expand the application scenarios. Summary of the Invention

[0005] The purpose of this invention is to provide an engineering bamboo composite shear wall and its construction method, which can solve the above-mentioned problems existing in related technologies.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] On one hand, an engineered bamboo composite shear wall is provided, including an engineered bamboo shear wall body. The engineered bamboo shear wall body is fixed with steel connectors corresponding to the connection points of each floor. The steel connectors are provided with anchoring components. Prestressed tension members are arranged on the outer side of the engineered bamboo shear wall body. The prestressed tension members are adapted to and connected with the anchoring components. The prestressed tension members are provided with prestressing adjustment components. The prestressed tension members apply vertical preload to the engineered bamboo shear wall body through the adjustment of the prestressing adjustment components, so that the engineered bamboo shear wall body completes precompression.

[0008] Optionally, the prestressed tensioning members are arranged vertically and evenly spaced along the width of the engineering bamboo shear wall body.

[0009] Optionally, the prestressed tensioning member is a prestressed steel bar or a prestressed strand, wherein the prestressed strand is formed by twisting together multiple steel strands.

[0010] Optionally, the anchoring component is an anchoring perforated support, and the prestressed tensioning member is inserted through the anchoring perforated support; One end of the prestressed tensioning member is provided with a threaded section, and the other end is provided with a limiting head. The prestressed adjustment component is threadedly engaged with the threaded section. The threaded section and the limiting head are respectively located on opposite sides of the two anchoring perforated supports. Alternatively, both ends of the prestressed tensioning member are provided with threaded sections, and each threaded section is fitted with a prestress adjustment component, with the two prestress adjustment components located on opposite sides of the two anchoring perforated supports.

[0011] Optionally, the pre-compression of the engineering bamboo shear wall body shall not be less than 1% of its vertical height.

[0012] Optionally, the outer periphery of the engineering bamboo shear wall body is fitted with a non-removable formwork shell, and a cavity is reserved between the non-removable formwork shell and the engineering bamboo shear wall body, and the prestressed tensioning member and anchoring member are all located in the cavity.

[0013] Optionally, the cavity is filled with self-compacting foamed concrete, which fills and covers the exposed portions of the prestressed tension members, anchoring components, and steel connectors.

[0014] Optionally, the material of the non-removable formwork shell is one of bamboo-reinforced bamboo fiber concrete, cement fiber composite board, or foamed ceramic board. And / or, the formwork shell is fixedly connected to the engineering bamboo shear wall body by tie bolts, the tie bolts passing through the engineering bamboo shear wall body and connecting the formwork shells on both sides; And / or, the outer surface of the non-removable mold shell is provided with a decorative coating, which is one of elastic paint, real stone paint, flexible tile layer or bamboo texture coating.

[0015] On the other hand, a construction method for an engineered bamboo composite shear wall is provided, including the following steps: The prefabricated bamboo shear wall body has steel connectors fixed at the connection points of each floor on the bamboo shear wall body, and anchoring components are installed on the steel connectors. Prestressed tension members are arranged on the outside of the bamboo shear wall body of the project, the prestressed tension members are adapted and connected to the anchoring components, and prestress adjustment components are configured on the prestressed tension members. Operate the prestress adjustment component to apply vertical prestress to the engineering bamboo shear wall body, so that the engineering bamboo shear wall body completes pre-compression; The pre-compressed engineering bamboo shear wall body is hoisted to the construction site to complete the connection between the engineering bamboo shear wall body and the external building components.

[0016] Optionally, during the prefabrication stage in the workshop, after the pre-compression of the engineering bamboo shear wall body is completed, the following steps are also included: A non-removable formwork shell is installed on the outer periphery of the pre-compressed engineering bamboo shear wall body. A cavity is reserved between the non-removable formwork shell and the engineering bamboo shear wall body so that the prestressed tensioning member and anchoring member are located in the cavity. After the pre-compressed engineering bamboo shear wall body is hoisted to the construction site, it is fixedly connected to the building beam through the steel connectors, thus completing the node assembly of the engineering bamboo composite shear wall and the superstructure. After the bamboo shear wall body of the project is hoisted into place and connected to the external building components, self-compacting foam concrete is poured into the cavity. The self-compacting foam concrete fills and covers the exposed parts of the prestressed tension members, anchoring components and steel connectors.

[0017] The beneficial effects of this application are as follows: By integrating anchoring components on the floor steel connectors and cooperating with external prestressing tensioning components and adjustment components to apply vertical prestress to the shear wall body to achieve precompression, this application can significantly improve the vertical stiffness, compressive bearing capacity, and deformation resistance of the engineered bamboo shear wall, effectively reduce the deformation and residual deformation of the wall under vertical loads, and avoid phenomena such as wall cracking and loosening of joints. At the same time, the steel connectors have the dual functions of structural connection and prestressed anchoring, simplifying the overall structure and reducing the difficulty of processing and assembly. The prestressed adjustment components can achieve precise control of the prestress, ensuring uniform and stable prestressing effect, greatly improving the structural reliability, durability, and applicability of the engineered bamboo composite shear wall, and making it more suitable for the use needs of mid-to-high-rise prefabricated green buildings. Attached Figure Description

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a longitudinal sectional view of the bamboo composite shear wall described in the embodiments of this application; Figure 2 This is a transverse sectional view of the bamboo composite shear wall described in the embodiments of this application.

[0020] In the picture: 1. Bamboo shear wall body; 2. Steel connectors; 3. Anchoring components; 4. Prestressed tensioning components; 5. Formwork that does not need to be removed; 51. Tie bolts; 6. Self-compacting foamed concrete; 7. Decorative coating; 8. Building beams. Detailed Implementation

[0021] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] With the rapid development of green building and prefabricated building, engineered bamboo is widely used in the field of building structure due to its advantages of being renewable, having a high strength-to-weight ratio, and being low-carbon and environmentally friendly. As the core enclosure and load-bearing component in a building, engineered bamboo shear wall plays an important role in resisting lateral displacement and transmitting vertical loads. Its structural performance directly affects the overall stability and safety of the building.

[0025] Existing engineered bamboo shear walls typically consist of the bamboo shear wall body and steel connectors fixed to the body at the corresponding floor connections. These steel connectors are primarily used to connect the shear wall to external building components such as floor beams, ensuring the reliability of the connection between the shear wall and the overall building structure. However, engineered bamboo itself has inherent defects such as large compressive deformation, significant residual deformation, and insufficient stiffness. Existing engineered bamboo shear walls rely solely on the strength of the bamboo itself and the connection effect of the steel connectors to bear the load. Over long-term use, this can easily lead to problems such as wall cracking, loose joints, and excessive vertical deformation, severely affecting the load-bearing capacity and service life of the shear wall.

[0026] Therefore, in response to the technical problems of existing engineering bamboo shear walls, such as insufficient stiffness, large deformation under pressure, and limited application scope, there is an urgent need for an engineering bamboo composite shear wall that can strengthen the structure, improve structural performance, and expand the application scenarios.

[0027] To overcome the above technical problems, refer to Figure 1 and Figure 2 This application provides an engineering bamboo composite shear wall, including an engineering bamboo shear wall body 1. The engineering bamboo shear wall body 1 is fixed with steel connectors 2 corresponding to the connection points of each floor. The steel connectors 2 are provided with anchoring components 3. Prestressed tension members 4 are arranged on the outer side of the engineering bamboo shear wall body 1. The prestressed tension members 4 are adapted to and connected with the anchoring components 3. The prestressed tension members 4 are provided with prestress adjustment components. The prestressed tension members 4 apply vertical preload to the engineering bamboo shear wall body 1 through the adjustment of the prestress adjustment components, so that the engineering bamboo shear wall body 1 completes precompression.

[0028] Specifically, the engineered bamboo shear wall body 1 is the main load-bearing and enclosure component of the shear wall, prefabricated from engineered bamboo panels or engineered bamboo composite components, featuring low carbon emissions, environmental friendliness, lightweight, and high strength. Steel connectors 2 are fixed to the engineered bamboo shear wall body 1 at the corresponding floor connections. These steel connectors 2 ensure reliable connections between the shear wall and the upper structure, such as the building beams 8 and frames, as well as surrounding components, guaranteeing smooth force transmission throughout the structure. Anchoring components 3 are installed on the steel connectors 2, providing fixing and load-bearing points for the prestressed components, ensuring reliable prestress transmission.

[0029] Prestressed tension members 4 are arranged on the outer side of the engineering bamboo shear wall body 1. The prestressed tension members 4 are arranged vertically and are adapted to and connected to the anchoring components 3. The anchoring components 3 position and constrain the prestressed tension members 4. The prestressed tension members 4 are equipped with prestress adjustment components, which are used to adjust and control the tension force of the prestressed tension members 4. During construction or use, by operating the prestress adjustment components, the prestressed tension members 4 can apply a stable and uniform vertical preload to the engineering bamboo shear wall body 1. Under the action of the vertical preload, the engineering bamboo shear wall body 1 undergoes controllable compressive deformation and completes precompression, thereby establishing prestress inside the wall and improving the stress state of the wall.

[0030] This application integrates anchoring components 3 on the floor steel connectors 2, and, in conjunction with the external prestressing tensioning components 4 and adjustment components, applies vertical prestress to the shear wall body to achieve precompression. This significantly improves the vertical stiffness, compressive bearing capacity, and deformation resistance of the engineered bamboo shear wall, effectively reducing the deformation and residual deformation of the wall under vertical loads, and avoiding phenomena such as wall cracking and loosening of joints. At the same time, the steel connectors 2 have the dual functions of structural connection and prestressed anchoring, simplifying the overall structure and reducing the difficulty of processing and assembly. The prestressed adjustment components can achieve precise control of the prestress, ensuring uniform and stable prestressing effect, greatly improving the structural reliability, durability, and applicability of the engineered bamboo composite shear wall, and making it more suitable for the use needs of mid-to-high-rise prefabricated green buildings.

[0031] In one embodiment, reference is made to Figure 2 The prestressed tensioning members 4 are arranged vertically and evenly spaced along the width of the engineering bamboo shear wall body 1.

[0032] Specifically, the prestressed tension members 4 are vertically arranged throughout the wall, with their two ends respectively adapted and connected to the anchoring components 3 on the steel connectors 2 at the corresponding floor connections of the bamboo shear wall body 1, forming a prestressed tensioning system that runs through the entire vertical height of the shear wall, ensuring that the vertical preload can be uniformly transmitted along the height of the shear wall. The prestressed tension members 4 are evenly arranged at equal intervals along the width of the bamboo shear wall body 1, and the interval can be flexibly adjusted according to the width of the shear wall and the load level (preferably 300~500mm), ensuring that the vertical preload applied by each prestressed tension member 4 can uniformly cover the entire shear wall section, avoiding local stress concentration in the wall due to uneven distribution, and thus preventing problems such as local cracking and excessive deformation of the wall.

[0033] Furthermore, the prestressed tensioners 4 are arranged vertically, which can be consistent with the vertical force direction of the engineering bamboo shear wall body 1, so that the prestress can be directly and efficiently transferred to the shear wall body, maximizing the strengthening effect of prestress. The uniform spacing along the wall width can ensure that all parts of the shear wall body are subjected to uniform prestress, ensuring the overall force balance of the wall, further improving the vertical stiffness, compressive bearing capacity and lateral deformation resistance of the shear wall. At the same time, the number of prestressed tensioners 4 can be flexibly adjusted according to the wall width to adapt to engineering bamboo shear walls of different sizes, expanding the adaptability range of the structure.

[0034] The layout method of this embodiment further optimizes the stress rationality of the prestressed tensioning system, making the transmission of vertical prestress more uniform and efficient, effectively avoiding the risk of local stress concentration, while taking into account structural adaptability and construction flexibility. In synergy with the prestressed tensioning scheme mentioned above, it further improves the structural reliability and durability of the engineering bamboo composite shear wall, and is more suitable for mid-to-high-rise prefabricated building scenarios with different sizes and load requirements.

[0035] In one embodiment, the prestressed tensioning member 4 is a prestressed steel bar or a prestressed strand, wherein the prestressed strand is formed by twisting together multiple steel strands.

[0036] Specifically, the prestressed tensioning member 4 is selected from two matching forms: prestressed steel bars or prestressed tendons. Both have the core characteristics of high strength, high toughness, and anti-relaxation. They can withstand tensile stress for a long time without producing obvious residual deformation, ensuring that the vertical prestress applied to the engineering bamboo shear wall body 1 is stable and reliable. Both forms are compatible with the anchoring component 3 and the prestressing adjustment component mentioned above. They can be directly matched and connected with the anchoring component 3 and cooperate with the adjustment component to achieve prestress adjustment without additional structural compatibility adjustments. The prestressed steel bars are made of high-strength threaded steel bars, whose surface threads can reliably engage with prestressing adjustment components (such as lock nuts and straight threaded sleeves). They also have moderate stiffness, are easy to process, and have high on-site installation efficiency, without the need for complex twisting processes. They are suitable for engineering bamboo composite shear wall scenarios with high requirements for construction convenience and moderate load levels. The prestressed strands are formed by twisting multiple high-strength steel strands together. The twisting structure allows each steel strand to be stressed evenly, and the overall tensile strength is much higher than that of a single prestressed steel bar. They also have small cross-sectional dimensions and good flexibility, and can provide greater tension in a smaller layout space. They are suitable for mid-to-high-rise engineering bamboo composite shear wall scenarios with larger wall widths, higher vertical loads, and higher requirements for prestress.

[0037] Furthermore, both types of prestressed tensioning members 4 are arranged on the outer side of the shear wall body 1, eliminating the need for grooving or perforation on the wall body and avoiding weakening the structural strength of the wall itself. This can be coordinated with the previously mentioned method of "uniformly spaced along the vertical and width directions" to ensure that the prestress is evenly transmitted to the shear wall body, achieving reliable pre-compression of the wall. Both prestressed steel bars and prestressed tendons can be precisely controlled through prestress adjustment components to adapt to different load requirements, ensuring the establishment of stable prestress within the shear wall body.

[0038] This embodiment further optimizes the adaptability and reliability of the prestressing tensioning system by clarifying the specific form and structure of the prestressing tensioning member 4. The two types of prestressing tensioning members 4 can be flexibly selected according to the actual load level, wall width, and construction conditions of the project. This ensures the stability and efficiency of prestressing application, expands the applicable scenarios of the engineering bamboo composite shear wall, and takes into account both construction convenience and structural load-bearing requirements. In conjunction with the prestressing layout scheme and anchoring scheme mentioned above, it further enhances the prestressing strengthening effect of the engineering bamboo shear wall and improves the vertical stiffness, compressive bearing capacity, and durability of the wall.

[0039] In one embodiment, the anchoring component 3 is an anchoring perforation support, and the prestressed tensioning member 4 is inserted through the anchoring perforation support; One end of the prestressed tensioning member 4 is provided with a threaded section, and the other end is provided with a limiting head. The prestressed adjustment component is threadedly engaged with the threaded section. The threaded section and the limiting head are respectively located on opposite sides of the two anchoring perforated supports. Alternatively, both ends of the prestressed tensioning member 4 are provided with threaded sections, and each threaded section is fitted with a prestress adjustment component, with the two prestress adjustment components located on opposite sides of the two anchoring perforated supports.

[0040] Specifically, the anchoring perforated support is a support component with a through perforation, which is fixed to the steel connector 2. The prestressed tensioning member 4 passes through the perforation to achieve positioning and load bearing, so that the prestressed tensioning member 4 remains stable during tensioning and operation, avoids deviation and slippage, and ensures that the vertical prestress is transmitted to the engineering bamboo shear wall body 1 in the predetermined direction.

[0041] This embodiment provides two types of four-end structures for prestressed tension members: The first type is a single-end adjustment form: one end of the prestressed tensioning member 4 is an adjustment end with a threaded section, and the other end is a fixed end with a limiting head. The outer dimensions of the limiting head are larger than the diameter of the perforation hole of the anchorage perforation support, and it can directly abut against one side of the anchorage perforation support to form an axial limit; the prestressed adjustment component is threadedly connected to the threaded section and abuts against the opposite side of the other anchorage perforation support. By turning the prestressed adjustment component, the prestressed tensioning member 4 can be tensioned, thereby generating vertical prestress on the shear wall body. This form has a simple structure and is quick to install, and is suitable for scenarios with moderate load requirements and high construction efficiency requirements.

[0042] The second type is the double-end adjustment form: both ends of the prestressed tension member 4 are provided with threaded sections, and both ends are equipped with prestress adjustment components. The two adjustment components are respectively pressed against the opposite sides of the upper and lower anchoring perforated supports. By simultaneously or separately turning the adjustment components at both ends, the prestressed tension member 4 can be tensioned at both ends, so that the prestress is applied more evenly and the adjustment accuracy is higher. It is suitable for bamboo composite shear walls in mid-to-high-rise projects with large wall height and strict prestress control requirements.

[0043] Both of the above-mentioned end structures can achieve reliable connection between the prestressed tensioning member 4 and the anchoring perforated support, and precise adjustment of the prestress. The anchoring, tensioning and adjustment are integrated, eliminating the need for additional complex accessories. The assembly is simple and the stress is clear, which can effectively ensure the stability of the prestressing process and the durability during the service stage, further improving the prestressing strengthening effect and structural reliability of the engineering bamboo composite shear wall.

[0044] In one embodiment, the pre-compression of the engineering bamboo shear wall body 1 is not less than 1% of its vertical height.

[0045] Specifically, the pre-compression amount refers to the ratio of the vertical compression deformation of the engineering bamboo shear wall body 1 under the vertical pre-stress applied by the prestressing tensioner 4 to the vertical height of the wall itself, and this ratio must meet the requirement of not less than 1%. For example, if the vertical height of the engineering bamboo shear wall body 1 is 3m, then its pre-compression amount must be not less than 30mm; if the vertical height is 4m, then the pre-compression amount must be not less than 40mm. The specific compression amount can be flexibly adjusted by the prestressing adjustment component according to the load level of the wall and the mechanical properties of the engineering bamboo, but it must be ensured that it is not lower than the above minimum limit value.

[0046] This limitation is based on the inherent characteristics of engineered bamboo: engineered bamboo itself has the defects of large compression deformation and obvious residual deformation. If the pre-compression amount is too small (less than 1%), it is impossible to establish sufficient pre-compression stress inside the engineered bamboo shear wall body 1. It is difficult to effectively offset the additional compression deformation and residual deformation generated by the wall during later use (such as bearing vertical loads and temperature changes), and the strengthening effect of prestress cannot be fully utilized. Problems such as wall cracking and loosening of joints may still occur. On the other hand, a pre-compression amount of not less than 1% can ensure that a stable and sufficient pre-compression stress is established inside the wall, which can effectively offset the deformation during later use, so that the engineered bamboo shear wall body 1 can maintain a stable stress state for a long time. At the same time, it can further improve the vertical stiffness and compressive bearing capacity of the wall and reduce the amount of deformation of the wall in the later stage.

[0047] Furthermore, the limitation of this pre-compression amount can work in conjunction with the arrangement of the prestressed tensioning members 4 and the end structure form mentioned above. The pre-compression amount can be precisely controlled by the prestressing adjustment component, which not only ensures the pre-compression effect, but also avoids excessive deformation and damage to the bamboo shear wall body 1 due to excessive pre-compression amount, thus taking into account both the structural strengthening effect and the structural safety of the wall itself.

[0048] This embodiment further standardizes the implementation criteria for prestressing strengthening by specifying the minimum pre-compression amount, ensuring that the prestressing tensioning scheme can play its full role, effectively improving the stress performance of the engineering bamboo shear wall body 1, reducing the risk of later deformation and cracking, and providing a clear reference for pre-pressure adjustment during construction, improving construction accuracy and structural reliability, and making the engineering bamboo composite shear wall more suitable for the long-term use needs of mid-to-high-rise prefabricated buildings.

[0049] In one embodiment, a non-removable formwork shell 5 is provided around the outer periphery of the engineering bamboo shear wall body 1, and a cavity is reserved between the non-removable formwork shell 5 and the engineering bamboo shear wall body 1. The prestressed tensioning member 4 and the anchoring member 3 are both located in the cavity.

[0050] Specifically, the non-removable formwork 5 completely covers the outer perimeter of the engineering bamboo shear wall body 1. After construction, it does not need to be removed and can be directly used as a permanent external protection and forming template for the shear wall. A continuous and uniform cavity is formed between the non-removable formwork 5 and the engineering bamboo shear wall body 1. This cavity is specifically designed to accommodate the prestressed tensioning members 4, anchoring components 3, and steel connectors 2, ensuring that the entire prestressed system and steel connecting components are within a closed internal space. This avoids problems such as collisions, corrosion, and aging during transportation, hoisting, and use, ensuring the long-term stability and reliability of the prestressed load-bearing system. It also keeps the outer side of the shear wall flat and regular, providing favorable conditions for subsequent pouring of filling materials and decorative construction.

[0051] Meanwhile, the presence of the cavity does not interfere with the vertical arrangement, tensioning adjustment and prestress transmission of the prestressed tensioning member 4. It can achieve full protection of the core load-bearing component without damaging the engineering bamboo shear wall body 1 or affecting the prestressing strengthening effect, thereby further improving the integrity, durability and prefabricated construction efficiency of the shear wall.

[0052] In one embodiment, the cavity is filled with self-compacting foamed concrete 6, which fills and covers the exposed portions of the prestressed tension member 4, the anchoring member 3, and the steel connector 2.

[0053] Specifically, the self-compacting foamed concrete 6 has excellent fluidity and self-compacting properties. During pouring, it can fully fill the cavity between the non-removable formwork 5 and the engineering bamboo shear wall body 1 without vibration, and completely and tightly wrap the exposed sections of the prestressed tensioning member 4, anchoring member 3 and steel connector 2, so that the prestressed member, connection node and shear wall body and external enclosure structure form an integrated force system.

[0054] This infill layer serves two purposes: firstly, it provides a sealed protection for the prestressed tensioning members 4, anchoring components 3, and steel connectors 2, isolating them from external moisture, corrosion, and other adverse effects, preventing component rust and loosening, and ensuring the long-term stability and reliability of the prestressed system; secondly, it improves the overall stiffness, integrity, and lateral displacement resistance of the shear wall, while being lightweight and not significantly increasing the structural load, thus complementing the prestressing strengthening scheme and the non-removable formwork 5 protection system; furthermore, the lightweight nature of the self-compacting foamed concrete 6 does not significantly increase the structural weight, and it also provides thermal insulation, sound insulation, and fireproofing, enhancing the durability and safety performance of the engineered bamboo composite shear wall, and meeting the requirements for use in prefabricated green buildings.

[0055] In one embodiment, the material of the non-removable formwork shell 5 is one of bamboo fiber reinforced concrete, cement fiber composite board, or foamed ceramic board.

[0056] Among them, bamboo fiber reinforced concrete uses bamboo fiber as the reinforcing material and bamboo reinforcement as the load-bearing skeleton, which is compatible with the material characteristics of the engineering bamboo shear wall body 1. It makes full use of the advantages of bamboo resources being renewable, low-carbon and environmentally friendly, further reducing the overall carbon footprint of the structure. Moreover, its mechanical properties are highly compatible with engineering bamboo materials. After being poured and formed, it is tightly bonded with the self-compacting foam concrete 6 in the cavity, which can improve the overall integrity of the shear wall. Cement fiber composite board is made of cement and fiber reinforcing materials. It has excellent anti-corrosion, anti-aging and waterproof performance, and has high molding precision and convenient installation. It is suitable for complex environments such as dampness and outdoors, and can effectively extend the service life of the non-removable formwork 5, providing reliable protection for internal prestressed components and steel connectors 2. Foamed ceramic board is made of ceramic raw materials as the base material and is foamed and formed. It has the characteristics of being lightweight, heat-insulating, fireproof and sound-insulating. It is also strong and not easily damaged. It can be used as a non-removable outer formwork to ensure the molding precision of the cavity, and can also take into account the heat insulation and sound insulation performance of the shear wall. It is suitable for prefabricated building scenarios with energy-saving and heat-insulating requirements.

[0057] In one embodiment, the non-removable formwork 5 is fixedly connected to the engineering bamboo shear wall body 1 by tie bolts 51, and the tie bolts 51 penetrate the engineering bamboo shear wall body 1 and connect the non-removable formwork on both sides.

[0058] Specifically, the tie bolts 51 are evenly spaced along the vertical and horizontal directions of the engineering bamboo shear wall body 1. After passing through the engineering bamboo shear wall body 1, they connect and fix the two sides of the formwork shell 5 in both directions, so that the formwork shell 5 and the engineering bamboo shear wall body 1 form a stable whole. This ensures that the width of the reserved cavity between the two is uniform and the shape is regular. It can effectively prevent problems such as bulging, displacement and leakage of the formwork shell 5 during subsequent concrete pouring, and ensure that the cavity forming accuracy and the overall shape and size of the shear wall meet the design requirements.

[0059] The tie bolts 51 adopt a through-type connection, which does not occupy the internal space of the cavity, nor does it interfere with the layout and tension adjustment of the prestressed tensioning members 4. At the same time, it can greatly improve the installation firmness of the non-removable formwork shell 5 and the overall integrity of the shear wall, so that the external envelope structure and the wall body can work together to bear the force, further improving the structural stiffness and lateral displacement resistance of the engineering bamboo composite shear wall.

[0060] This connection method is simple in construction, convenient to assemble, and reliable in bearing force. It is suitable for prefabrication production in workshops and can effectively improve the prefabrication construction efficiency and forming quality of shear walls, providing a stable structural foundation for the protection of prestressed components, concrete filling and subsequent assembly construction.

[0061] In one embodiment, the outer surface of the non-removable mold shell 5 is provided with a decorative coating 7, which is one of elastic paint, real stone paint, flexible tile layer or bamboo texture coating.

[0062] Specifically, the decorative coating 7 is directly attached to the outer surface of the non-removable formwork 5, and the construction can be completed simultaneously during the prefabrication stage of the shear wall. As a permanent decorative layer on the outside of the shear wall, it eliminates the need for secondary plastering, tiling and other decorative processes on site, truly realizing the integrated prefabricated molding of the shear wall's "structure-protection-decoration".

[0063] Among them, the elastic coating has good ductility and waterproof and crack-resistant properties, and can adapt to the non-removable formwork 5 and slight deformation of the wall without cracking or falling off, and has both protective and decorative effects; the real stone paint has a realistic texture and strong weather resistance, which can improve the aesthetics and durability of the exterior of the shear wall, and is suitable for buildings with high requirements for the texture of the facade; the flexible facing brick layer is lightweight, flexible and firmly adhered, and will not significantly increase the self-weight of the structure, and its appearance is close to that of traditional facing bricks, with strong decorative properties; the bamboo-textured coating can echo the material style of the engineering bamboo shear wall body 1, with a unified and natural visual effect, highlighting the green, low-carbon and ecological environmental protection building characteristics.

[0064] The decorative coating 7 is integrated with the formwork shell 5, which can protect the formwork shell 5, provide weather resistance and anti-aging effects, extend the service life of the external envelope structure, eliminate the need for on-site exterior wall decoration, significantly shorten the construction cycle of prefabricated buildings, reduce construction costs, meet the facade design requirements of different buildings, and further improve the integration and comprehensive applicability of the bamboo composite shear wall.

[0065] On the other hand, a construction method for an engineered bamboo composite shear wall is provided, including the following steps: 1) Prefabricated engineering bamboo shear wall body 1, steel connectors 2 are fixed on the engineering bamboo shear wall body 1 at the connection points of each floor, and anchoring components 3 are installed on the steel connectors 2; Specifically, this step is the workshop prefabrication stage, prioritizing standardized factory prefabrication to ensure the dimensional accuracy and structural stability of the engineering bamboo shear wall body 1. The engineering bamboo shear wall body 1 is constructed by splicing and gluing engineering bamboo panels or composite engineering bamboo components according to the design dimensions. After molding, it undergoes curing to ensure the body's strength meets design requirements. Subsequently, steel connectors 2 are fixed to the body at predetermined positions corresponding to the connections between each floor using welding, high-strength bolts, or other methods. The position and quantity of steel connectors 2 must correspond to the connection nodes of external building components such as floor beams to ensure the accuracy of subsequent on-site assembly. After the steel connectors 2 are fixed, anchoring components 3 (preferably anchoring perforated supports) are fixed to them. The fixing method can be welding or bolting to ensure that the anchoring components 3 are firmly installed and accurately positioned, providing reliable support for the subsequent placement and connection of prestressed tensioning members 4. Simultaneously, the perforation direction of the anchoring components 3 must be consistent with the vertical placement direction of the prestressed tensioning members 4 to avoid affecting subsequent tensioning adjustments.

[0066] 2) Prestressed tension members 4 are arranged on the outside of the bamboo shear wall body 1 of the project, the prestressed tension members 4 are adapted and connected to the anchoring components 3, and prestress adjustment components are arranged on the prestressed tension members 4. Specifically, the prestressed tension members 4 should be laid out in accordance with the requirements of the structural embodiment described above. They should be laid out vertically along the main body 1 of the engineering bamboo shear wall and evenly spaced along the width of the wall. The spacing should be flexibly adjusted according to the wall size and load level (preferably 300~500mm). During laying, the prestressed tension members 4 (which can be prestressed steel bars or prestressed strands) are inserted into the holes of the anchoring components 3 (anchoring perforated supports) on the steel connectors 2 to achieve the positioning and constraint of the prestressed tension members 4. If the prestressed tension members 4 are of the single-end adjustment type (one end threaded section, one end limiting head), then one side of the limiting head is abutted against one side of the lower anchoring perforated support, and the threaded section passes through the upper anchoring perforated support and extends out. If it is of the double-end adjustment type (both ends are threaded sections), then the threaded sections at both ends pass through the upper and lower anchoring perforated supports respectively and extend out. Subsequently, prestress adjustment components (such as lock nuts and straight threaded sleeves) are installed on the threaded section of the prestressed tension member 4 to ensure that the adjustment components are tightly fitted with the threaded section without any looseness, thus preparing for subsequent prestress adjustment. This step requires ensuring that the prestressed tension member 4 is laid flat and without bending, and fits snugly with the anchoring component 3 to avoid misalignment or slippage, and to ensure smooth transmission of prestress.

[0067] 3) Operate the prestress adjustment component to apply vertical prestress to the engineering bamboo shear wall body 1 by the prestress tensioning member 4, so that the engineering bamboo shear wall body 1 completes pre-compression; Specifically, this step is the core process of prestressing tensioning. During operation, the prestressing tensioner 4 is tensioned by turning the prestressing adjustment component according to the design requirements for precompression (not less than 1% of the vertical height of the bamboo shear wall body 1). If it is a single-end adjustment, turning the adjustment component on the threaded section utilizes the clamping action between the adjustment component and the anchoring perforated support to pull the prestressing tensioner 4, generating tension stress and applying vertical preload to the bamboo shear wall body 1. If it is a double-end adjustment, the adjustment components at both ends can be turned simultaneously or separately to achieve bidirectional tensioning, making the preload application more uniform. During tensioning, the compression deformation of the bamboo shear wall body 1 needs to be monitored in real time. The preload is precisely controlled by the prestressing adjustment component until the wall compression deformation reaches the design requirements for precompression, completing the precompression operation. At this point, a stable preload stress is established inside the bamboo shear wall body 1, achieving prestress strengthening. After tensioning, the prestressing adjustment component can be locked to prevent subsequent preload loss.

[0068] 4) Hoist the pre-compressed engineering bamboo shear wall body 1 to the construction site to complete the connection between the engineering bamboo shear wall body 1 and the external building components.

[0069] Specifically, this step is the on-site installation stage. First, the prefabricated and pre-compressed engineering bamboo shear wall body 1 is hoisted. During hoisting, protective measures must be taken to avoid collisions with the non-removable formwork 5 (if already installed), prestressed tensioning components 4, and anchoring components 3, ensuring the components remain intact. After hoisting the wall to the preset construction position, the verticality and horizontal position of the wall are adjusted to meet design requirements. Then, the steel connectors 2 on the engineering bamboo shear wall body 1 are used to fix it to external building components such as floor beams. Connection methods can include bolting, welding, etc., ensuring that the connection nodes are firm and reliable, achieving coordinated force bearing between the shear wall and the overall building structure. After the connection is completed, the connection nodes need to be inspected to confirm that there is no looseness or deviation, ensuring the installation quality of the engineering bamboo composite shear wall and laying the foundation for subsequent cavity filling (if any), decoration construction, and other processes.

[0070] This construction method has a clear process and reasonable steps, which are in line with the prefabricated building concept of factory prefabrication and on-site assembly. The core revolves around the prestressing tensioning process, which is fully compatible with the structural scheme of the bamboo composite shear wall in the previous project. Through standardized prefabrication and precise tensioning, the prestressing strengthening effect is ensured. At the same time, the on-site construction process is simplified, the construction difficulty is reduced, and the construction efficiency and structural reliability are improved. It effectively solves the problems of inconvenient prestressing application, poor forming quality and low assembly efficiency in the construction of existing bamboo shear walls, and is suitable for the construction needs of mid-to-high-rise prefabricated green buildings.

[0071] In one embodiment, during the prefabrication stage in the workshop, after the pre-compression of the engineering bamboo shear wall body 1 is completed, the following steps are also included: A non-removable formwork shell 5 is installed on the outer periphery of the pre-compressed engineering bamboo shear wall body 1. A cavity is reserved between the non-removable formwork shell 5 and the engineering bamboo shear wall body 1 so that the prestressed tensioning member 4 and the anchoring member 3 are both located in the cavity. After the pre-compressed engineering bamboo shear wall body 1 is hoisted to the construction site, it is fixedly connected to the building beam 8 through the steel connector 2, thus completing the node assembly of the engineering bamboo composite shear wall and the superstructure. After the bamboo shear wall body 1 is hoisted into place and connected to the external building components, self-compacting foam concrete 6 is poured into the cavity. The self-compacting foam concrete 6 fills and covers the exposed parts of the prestressed tension member 4, anchoring component 3 and steel connector 2.

[0072] Specifically, in this embodiment, after the prestressing is applied during the factory prefabrication stage, a non-removable formwork 5 is assembled on the outer periphery of the engineering bamboo shear wall body 1. The closed cavity formed between the non-removable formwork 5 and the wall is used to house the prestressed tensioning member 4 and the anchoring member 3, thereby achieving prefabricated protection of the core prestressed load-bearing components and avoiding collisions, displacements or damages during transportation and hoisting, thus ensuring the integrity and stability of the prestressed system.

[0073] After the shear wall is hoisted to the construction site and aligned, it is reliably connected to the building beam 8 using steel connectors 2 at the floor level. This creates a strong force transmission node between the shear wall and the superstructure, ensuring the overall structure bears the load collaboratively. Once the wall is fully in place and fixed, self-compacting foam concrete 6 is poured into the cavity. Utilizing its self-leveling and self-compacting properties, the cavity is filled without vibration, completely encasing the exposed sections of the prestressed tension members 4, anchoring components 3, and steel connectors 2. This bonds the internal components to the formwork 5 (which does not require removal) and the engineering bamboo shear wall body 1 as a whole.

[0074] This construction process achieves integrated construction of "pre-tensioning - external protection - on-site assembly - overall filling", which not only ensures the accuracy of prestressing application and the protective effect of components, but also greatly simplifies on-site procedures and improves the efficiency of prefabricated construction. At the same time, the integrity, rigidity and durability of the shear wall are further improved by filling with concrete, forming a complete and matching construction system with the structural scheme mentioned above.

[0075] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0076] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0078] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An engineered bamboo composite shear wall, comprising an engineered bamboo shear wall body (1), wherein the engineered bamboo shear wall body (1) is fixedly provided with steel connectors (2) corresponding to the connection points of each floor, characterized in that, The steel connector (2) is provided with an anchoring component (3), and a prestressed tensioning component (4) is provided on the outer side of the engineering bamboo shear wall body (1). The prestressed tensioning component (4) is adapted to and connected with the anchoring component (3). The prestressed tensioning component (4) is provided with a prestress adjustment component. The prestressed tensioning component (4) applies vertical prestress to the engineering bamboo shear wall body (1) through the adjustment of the prestress adjustment component, so that the engineering bamboo shear wall body (1) completes pre-compression.

2. The engineering bamboo composite shear wall according to claim 1, characterized in that, The prestressed tensioning members (4) are arranged vertically and evenly spaced along the width of the engineering bamboo shear wall body (1).

3. The engineering bamboo composite shear wall according to claim 1, characterized in that, The prestressed tensioning member (4) is a prestressed steel bar or a prestressed strand, which is formed by twisting together multiple steel strands.

4. The engineering bamboo composite shear wall according to claim 1, characterized in that, The anchoring component (3) is an anchoring perforated support, and the prestressed tensioning member (4) is inserted through the anchoring perforated support; One end of the prestressed tensioning member (4) is provided with a threaded section, and the other end is provided with a limiting head. The prestressed adjustment component is threadedly engaged with the threaded section. The threaded section and the limiting head are located on opposite sides of the two anchoring perforated supports, respectively. Alternatively, both ends of the prestressed tensioning member (4) are provided with threaded sections, and each threaded section is fitted with a prestress adjustment component, with the two prestress adjustment components located on opposite sides of the two anchoring perforated supports.

5. The engineering bamboo composite shear wall according to claim 1, characterized in that, The pre-compression of the bamboo shear wall body (1) of the project shall not be less than 1% of its vertical height.

6. The engineering bamboo composite shear wall according to claim 1, characterized in that, The outer periphery of the engineering bamboo shear wall body (1) is fitted with a non-removable formwork shell (5), and a cavity is reserved between the non-removable formwork shell (5) and the engineering bamboo shear wall body (1). The prestressed tensioning member (4) and the anchoring member (3) are both located in the cavity.

7. The engineering bamboo composite shear wall according to claim 6, characterized in that, The cavity is filled with self-compacting foamed concrete (6), which fills and covers the exposed parts of the prestressed tension member (4), anchoring member (3) and steel connector (2).

8. The engineering bamboo composite shear wall according to claim 6, characterized in that, The material of the non-removable formwork shell (5) is one of bamboo fiber concrete, cement fiber composite board or foamed ceramic board. And / or, the non-removable formwork shell (5) is fixedly connected to the engineering bamboo shear wall body (1) by tie bolts (51), the tie bolts (51) penetrate the engineering bamboo shear wall body (1) and connect the non-removable formwork shell (5) on both sides; And / or, the outer surface of the non-removable mold shell (5) is provided with a decorative coating (7), which is one of elastic paint, real stone paint, flexible tile layer or bamboo texture coating.

9. A construction method for an engineering bamboo composite shear wall as described in any one of claims 1-8, characterized in that, Includes the following steps: A prefabricated bamboo shear wall body (1) is provided with steel connectors (2) fixed at the connection points of each floor on the bamboo shear wall body (1), and anchoring components (3) are installed on the steel connectors (2). Prestressed tension members (4) are arranged on the outside of the bamboo shear wall body (1) of the project, the prestressed tension members (4) are adapted and connected to the anchoring components (3), and prestressed adjustment components are configured on the prestressed tension members (4); Operate the prestress adjustment component to apply vertical prestress to the engineering bamboo shear wall body (1) through the prestress tensioning member (4), so that the engineering bamboo shear wall body (1) completes pre-compression; The pre-compressed engineering bamboo shear wall body (1) is hoisted to the construction site to complete the connection between the engineering bamboo shear wall body (1) and the external building components.

10. The construction method of the engineering bamboo composite shear wall according to claim 9, characterized in that, During the prefabrication stage in the workshop, after the pre-compression of the engineering bamboo shear wall body (1) is completed, the following steps are also included: A non-removable formwork shell (5) is installed on the outer periphery of the pre-compressed engineering bamboo shear wall body (1). A cavity is reserved between the non-removable formwork shell (5) and the engineering bamboo shear wall body (1), so that the prestressed tensioning member (4) and the anchoring member (3) are located in the cavity. After the pre-compressed engineering bamboo shear wall body (1) is hoisted to the construction site, it is fixedly connected to the building beam (8) through the steel connector (2) to complete the node assembly of the engineering bamboo composite shear wall and the superstructure. After the bamboo shear wall body (1) of the project is hoisted into place and connected with the external building components, self-compacting foam concrete (6) is poured into the cavity. The self-compacting foam concrete (6) fills and covers the exposed parts of the prestressed tension member (4), anchoring member (3) and steel connector (2).

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