CN111119378A - Prefabricated hollow superposed shear wall with vertical steel bars penetrating through edge members - Google Patents
Prefabricated hollow superposed shear wall with vertical steel bars penetrating through edge members Download PDFInfo
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- CN111119378A CN111119378A CN202010037169.XA CN202010037169A CN111119378A CN 111119378 A CN111119378 A CN 111119378A CN 202010037169 A CN202010037169 A CN 202010037169A CN 111119378 A CN111119378 A CN 111119378A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 182
- 239000010959 steel Substances 0.000 title claims abstract description 182
- 230000000149 penetrating effect Effects 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- 238000010276 construction Methods 0.000 claims abstract description 35
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 229910000746 Structural steel Inorganic materials 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims description 51
- 239000004567 concrete Substances 0.000 claims description 48
- 230000003014 reinforcing effect Effects 0.000 claims description 34
- 238000009434 installation Methods 0.000 claims description 32
- 230000002787 reinforcement Effects 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 8
- 238000005034 decoration Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 48
- 238000013461 design Methods 0.000 description 13
- 238000010009 beating Methods 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000746 body region Anatomy 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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Abstract
本发明公开了一种后穿边缘构件竖向钢筋的预制空心叠合剪力墙，采用定型管道在边缘构件及墙身位置形成上下贯通的竖向孔，无需专用成孔设备；预制墙边缘构件内仅布设竖向构造钢筋及箍筋，采用大直径边缘构件竖向受力钢筋代替传统剪力墙的多根小直径边缘构件竖向钢筋，现场施工时后穿于边缘构件竖向孔内，在预制墙根部设置手孔实现竖向受力钢筋的螺纹接头连接；墙身位置在竖向孔内楼面标高处设置附加连接钢筋与预制墙内竖向分布钢筋形成搭接连接。基于上述连接构造，可保证预制墙边缘构件竖向构造钢筋、墙身竖向分布钢筋均不伸出预制墙顶面、底面，预制墙生产阶段对应边模不开孔，可实现模具标准化、通用化，有利于成本控制及成品保护。
The invention discloses a prefabricated hollow superimposed shear wall with vertical steel bars passing through edge members at the back. Shaped pipes are used to form vertical holes through the edge members and the wall body, and no special hole-forming equipment is required; prefabricated wall edge members Only vertical structural steel bars and stirrups are arranged inside, and the vertical stress steel bars of large-diameter edge members are used to replace multiple vertical steel bars of small-diameter edge members of traditional shear walls, which are passed through the vertical holes of edge members during site construction. A hand hole is set at the root of the prefabricated wall to realize the threaded joint connection of the vertical force-bearing steel bar; the wall body is provided with an additional connecting steel bar at the floor elevation in the vertical hole to form a lap connection with the vertically distributed steel bar in the prefabricated wall. Based on the above connection structure, it can be ensured that the vertical structural steel bars of the edge members of the prefabricated wall and the vertical distribution steel bars of the wall body do not protrude from the top and bottom surfaces of the prefabricated wall, and the corresponding side molds of the prefabricated wall do not have holes in the production stage, which can realize the standardization and generalization of the mold. It is conducive to cost control and finished product protection.
Description
Technical Field
The invention belongs to the technical field of buildings, relates to a prefabricated shear wall, and particularly relates to a prefabricated hollow superposed shear wall with vertical steel bars penetrating through edge members.
Background
Through the development of the last decade, two large assembled integral shear wall structure systems of a full prefabricated shear wall structure and a superposed shear wall structure are formed in China. Due to the advantages of low steel bar lap joint cost, easy control of connection quality, light dead weight of the prefabricated wall, high field installation efficiency and the like of the superposed shear wall, the superposed shear walls such as the double-sided superposed shear wall, the prefabricated hollow slab shear wall and the like are rapidly developed in recent years, and good social and economic benefits are obtained. However, engineering practice shows that the existing superposed shear wall structure system generally has the problems of complex prefabricated wall production equipment, high production technology management threshold, large production line fixed investment, difficult electromechanical point pre-embedding and the like, can not be directly produced on the existing production lines such as a fixed mold table production line, a flat mold flow production line and the like with large quantity of domestic prefabricated parts, and restricts the application and development of the existing production lines. Meanwhile, due to the production process and the prefabricated wall structure, the prefabricated outer wall of a part of superposed shear wall structure system is difficult to realize structure, heat preservation and decoration integrated construction, cannot meet the actual requirements of the current assembly type engineering, and needs to be further optimized and perfected.
Before, the inventor proposes a patent application named as 'a prefabricated hollow superposed shear wall based on flat die production and steel bar lapping' to the national patent office, and the prefabricated hollow superposed shear wall based on the flat die production and the steel bar lapping, disclosed by the patent, overcomes the defects of the existing superposed shear wall structure system and can realize the integrated construction of prefabricated external wall structure, heat preservation and decoration. On the basis of the above patent, the invention optimizes and innovates the edge member structure of the prefabricated hollow superposed shear wall, adopts the vertical stressed steel bars of the rear-through edge member to avoid the vertical steel bars of the edge member of the prefabricated wall from forming the steel bars, can realize the generalization and standardization of the side formwork of the prefabricated wall, and is beneficial to cost control and finished product protection.
Disclosure of Invention
In order to overcome the defects of the existing composite shear wall technical system, the invention aims to provide the prefabricated hollow composite shear wall with the rear edge member vertical steel bars, which integrates the advantages of low connecting cost, easy control of connecting quality, light self weight of the prefabricated wall, high field installation efficiency and the like of the composite shear wall. In addition, the vertical steel bars and the vertical distribution steel bars of the edge component of the prefabricated wall do not extend out of the prefabricated wall, and a side die does not have holes during the production of the prefabricated wall, so that the generalization and standardization of the die can be realized, the production efficiency of the prefabricated wall can be improved, and the comprehensive cost of the prefabricated wall can be reduced; the vertical steel bars of the prefabricated wall do not extend outwards, so that the steel bars can be prevented from being bent in the transportation process, and finished product protection and field hoisting are facilitated.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a wear hollow superimposed shear wall of edge component vertical reinforcement after, includes the precast concrete wall body of taking the vertical hole, runs through the vertical atress reinforcing bar of major diameter edge component in the edge component vertical hole, lays the additional connecting reinforcement in the wall body vertical hole and the downthehole cast in situ post concrete of vertical. The prefabricated hollow superposed shear wall comprises an edge component part and a wall body part, and a vertical hole is formed in the prefabricated wall by adopting a shaping pipeline through one-step pouring without special hole forming equipment. The invention of the invention and the utility model patent, which is named as 'a prefabricated hollow superposed shear wall based on flat die production and steel bar lapping', is consistent with the structure of the wall body part. The edge component part, only lay vertical constructional steel bar and stirrup in the prefabricated wall edge component, adopt many minor diameter edge component vertical reinforcing bars of the vertical atress reinforcing bar of major diameter edge component replacement traditional shear force wall, wear to locate in the edge component vertical hole at the job site, set up the screwed joint connection that vertical atress reinforcing bar in the vertical hole realized at the prefabricated wall root and put up the hand hole. The vertical constructional steel bars of prefabricated wall edge component, wall body vertical distribution reinforcing bar all do not stretch out prefabricated wall top surface, bottom surface, and the prefabricated wall production stage corresponds the side forms and does not trompil, can realize that the mould is standardized, universalization, is favorable to cost control and finished product protection.
The prefabricated hollow superposed shear wall with the vertical steel bars penetrating through the edge components at the back is characterized in that only the vertical structural steel bars and the stirrups are arranged in the edge components of the prefabricated wall, and the vertical structural steel bars and the stirrups are consistent with those of a common cast-in-place shear wall; the vertical construction steel bars are arranged outside the range of the vertical holes of the edge members and do not extend out of the prefabricated wall, and the vertical construction steel bars only form a steel bar framework with the stirrups of the edge members and do not participate in stress calculation; the vertical stressed reinforcing steel bars of the large-diameter edge components are adopted to replace a plurality of vertical stressed reinforcing steel bars of small-diameter edge components of the traditional shear wall, after the installation of the on-site prefabricated wall is completed, the vertical stressed reinforcing steel bars of the large-diameter edge components penetrate through the vertical holes of the edge components, installation hand holes are reserved at the root parts of the edge components of the prefabricated wall, and the vertical stressed reinforcing steel bars of the edge components of the upper layer wall and the lower layer wall are connected by adopting reinforcing steel bar threaded joints in the installation hand.
The vertical holes of the edge members are formed by adopting shaping pipelines, the sections of the shaping pipelines are the same from top to bottom, circular, rectangular or other section forms can be adopted as required, one vertical stressed steel bar of the edge member is arranged in each shaping pipeline, and the sizes of the shaping pipelines along the thickness and the length direction of the wall body are not smaller than 80mm, so that the pouring quality of post-cast concrete in the vertical holes is ensured.
The large-diameter edge component vertical stressed steel bars are arranged along the thickness center line of the wall body, and on the basis of meeting the requirements of installation of the threaded joints in the installation hand holes and post-cast concrete pouring in the vertical holes, the edge component vertical stressed steel bars are arranged on one side of the edge component vertical holes in a deviating mode, so that the size of the edge component vertical holes is reduced, and cost control of the shaping pipeline for steel bar arrangement and edge component hole forming is facilitated; the vertical stressed steel bars of the large-diameter edge components participate in structural stress calculation, the reinforcement area meets the requirement of checking the normal section of the shear wall under the condition of pressure bearing, and a plurality of vertical steel bars of the small-diameter edge components of the traditional shear wall can be replaced according to the principle of equal-area replacement of the same strength grade steel bars.
The mounting hand hole at the root part of the edge member of the prefabricated wall is formed by occupying a forming die, and the size of the mounting hand hole is required to meet the mounting construction requirement of the vertical stressed steel bar threaded joint of the edge member; after the mounting hand holes are reserved, the wall thickness of concrete at the periphery of the hand holes is not smaller than 40mm, and the concrete wall is prevented from cracking in the process of pouring concrete after the vertical holes are poured in situ; in the hand hole range, the vertical structural steel bars of the edge components positioned in the concrete wall are kept continuous, and the vertical structural steel bars of the other edge components are cut off; the internal thread sleeves are pre-embedded in the precast wall concrete on two sides of the mounting hand hole and used for fixedly mounting the hand hole sealing template on site, so that the site construction efficiency is improved.
According to the prefabricated hollow superposed shear wall with the vertical steel bars of the rear-through edge component, the sections of the shaped pipelines for forming the vertical holes at the wall body position are the same from top to bottom, the shapes of the circular, rectangular or other sections can be adopted according to requirements, and the sizes of the pipelines along the thickness of the wall body and the length direction of the wall body are not smaller than 70mm, so that the pouring quality of post-cast concrete in the vertical holes is ensured; and a shaping pipeline is arranged at the center of each two columns of vertically distributed reinforcing steel bars to form a vertical hole.
The vertical distribution steel bars at the wall body position do not extend out of the top surface and the bottom surface of the prefabricated wall, one or two additional connecting steel bars are distributed near the elevation of the vertical hole floor at each wall body position, and the additional connecting steel bars are in lap joint with four adjacent vertical distribution steel bars in the prefabricated wall; the length of the additional connecting steel bars meets the steel bar overlapping requirement, the additional connecting steel bars are discontinuously arranged in the vertical holes along the height direction, and the total area is not less than the total area of four vertically distributed steel bars in overlapping connection with the additional connecting steel bars; within the lapping range of the vertically distributed reinforcing steel bars, the lacing bars of the two layers of reinforcing steel bar net sheets of the prefabricated wall are encrypted, and a lacing bar is arranged at the crossing position of each vertically distributed reinforcing steel bar and each horizontally distributed reinforcing steel bar; when two additional connecting steel bars are adopted, transverse steel bars can be welded at the upper end part and the lower end part of the two additional connecting steel bars to form a ladder bar, so that the additional connecting steel bars can be conveniently fixed on site, and the force transmission performance is improved.
The edge member pore-forming shaping pipeline and the wall body position pore-forming shaping pipeline are made of metal materials and can be made of thin-wall steel plates with patterns or protrusions on the surfaces in a winding mode, and the circular-section pipeline can be made of metal corrugated pipes.
The prefabricated hollow superposed shear wall with the rear penetrating edge member vertical steel bars is characterized in that the vertical structural steel bars and the vertical distribution steel bars of the prefabricated wall inner edge member are bent inwards at the upper part of the wall body within the length range of the connecting beam bottom longitudinal steel bars so as to penetrate through the inner sides of the connecting beam bottom longitudinal steel bars, so that the connecting beam longitudinal steel bars are ensured to be linearly arranged without being bent; the bending angle of the vertical constructional steel bars and the vertical distributed steel bars of the edge component is not more than 1:6, and the length of the bending section is not too long so as to facilitate the arrangement of stirrups of the edge component; the tie bars are arranged one by one at the crossing positions of the longitudinal bars at the bottom of the connecting beam and the vertical bars in the anchoring range of the wall bodies at the two sides, so that the anchoring performance of the longitudinal bars at the bottom of the connecting beam in the wall bodies at the two sides is improved.
According to the prefabricated hollow superposed shear wall with the vertical steel bars of the rear-through edge component, when the prefabricated wall is installed on site, the horizontal joint at the bottom of the prefabricated wall is arranged at the elevation of the floor, and in order to ensure the compactness of post-cast concrete at the horizontal joint, the distance between the bottom surface of the prefabricated wall and the top surface of the floor slab is not smaller than 50 mm; the internal thread sleeve is pre-buried at the bottom of the prefabricated wall, the bolt is screwed into the internal thread sleeve in a construction site, and the bolt is adopted to control the height of the horizontal joint and adjust the levelness of the prefabricated wall.
The bottom of the wall body of the prefabricated hollow superposed shear wall is provided with a horizontal inner groove to ensure that post-cast concrete is poured compactly, and the horizontal groove can be formed by adopting a template; the height of the horizontal inner groove is not lower than 80mm, the cross section is a trapezoidal cross section with a narrow upper part and a wide lower part, and the width of the upper bottom of the trapezoidal cross section is not lower than 80 mm.
The edge member structure can be used for prefabricating the positions of linear, L-shaped and T-shaped edge members, and adjusting the arrangement of the vertical stressed steel bars of the edge members in the shaped pipelines and the vertical holes according to the range of the edge members and the reinforcement distribution quantity of the vertical steel bars when the edge member structure is used for the L-shaped and T-shaped edge members.
When the side face of the prefabricated hollow superposed shear wall needs to extend out of the horizontally distributed reinforcing steel bars to be connected with the adjacent prefabricated hollow superposed shear wall or the cast-in-place shear wall, the structure of the horizontally distributed reinforcing steel bars and the structure of the vertical joint are extended out of the design specifications of prefabricated concrete building technical standards, prefabricated concrete structure technical regulations and the like.
The prefabricated hollow superposed shear wall is a structural wall and can be used for building external walls or internal walls, and further, the prefabricated hollow superposed shear wall, the heat-insulating layer and the external leaf wall boards can be integrally prefabricated in a factory to form the prefabricated sandwich heat-insulating hollow superposed shear wall, so that the heat-insulating, decorating and structural integration of the prefabricated external wall is realized; the prefabricated hollow superposed shear wall and the outer leaf wall plate are tied by adopting a heat-insulating tie piece.
The invention relates to a prefabricated hollow superposed shear wall with vertical steel bars of rear-through edge components, which comprises the following steps: binding a shear wall steel reinforcement framework, laying a shaping pipeline in the steel reinforcement framework, installing a prefabricated wall side die, a horizontal inner groove die and an installation hand hole occupying block, positioning the shaping pipeline, pouring concrete to form an internal vertical hole, and curing, shaping and demolding. Furthermore, the prefabricated sandwich heat-insulation hollow superposed shear wall can be produced by adopting a forward beating method or a backward beating method, and the construction procedures of the outer leaf wall plate, the heat-insulation layer and the heat-insulation tie piece are added.
The invention relates to a prefabricated hollow superposed shear wall with vertical steel bars of rear-penetrating edge members, which comprises the following field construction processes: the prefabricated hollow superposed shear wall is installed, the perpendicularity and the levelness of the prefabricated wall are adjusted, the vertical stressed steel bars of the edge members are arranged in the vertical holes of the edge members in a penetrating mode, the threaded joint connection of the steel bars is completed in the mounting hand holes, the additional connecting steel bars are arranged in the vertical holes of the wall body, horizontal seams and mounting hand hole templates are erected, after the vertical holes are poured, concrete is poured to achieve prefabricated wall connection, and the prefabricated wall is maintained and demolded.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the prefabricated wall, only the vertical constructional steel bars of the edge components are arranged in the prefabricated wall, the vertical stressed steel bars of the edge components penetrate through the vertical holes of the edge components, the vertical stressed steel bars of the edge components of the upper layer and the lower layer are connected at the roots of the edge components by adopting the steel bar threaded joints, the connection technology is mature, the force transmission performance is good, and the seismic performance of the prefabricated wall under large deformation can be ensured.
(2) According to the prefabricated wall, the vertically distributed reinforcing steel bars are connected in a lap joint mode through the additional connecting reinforcing steel bars, the problem that small-diameter reinforcing steel bars cannot be mechanically connected is solved, the requirements on machining and mounting precision are low, and the connecting cost is low.
(2) The invention adopts the shaping pipeline to form the internal vertical hole by one-step pouring, does not need special hole forming equipment, can adopt the existing production lines such as the fixed die table production line, the flat die flow production line and the like which have large quantities of domestic prefabricated parts at present, and does not need to add new fixing equipment; the prefabricated hollow superposed shear wall is formed in one step, the prefabricated production links are few, and the production efficiency is high; the shaping pipeline has simple shape and low processing cost.
(3) According to the prefabricated hollow superposed shear wall edge member, the vertical constructional steel bars and the vertical distribution steel bars do not extend out of the prefabricated wall, side forms can be prevented from being perforated in the production stage of the prefabricated wall, the standardization and universalization of molds are facilitated, and the cost of the prefabricated member is further reduced; the prefabricated wall does not have longer overhanging reinforcing bar, can avoid transportation, hoist and mount in-process reinforcing bar to buckle, is favorable to the finished product protection, and on-the-spot prefabricated wall installation effectiveness is high.
(4) According to the invention, the outer leaf wall plate and the heat-insulating layer can be additionally arranged on the basis of the prefabricated hollow superposed shear wall to form the prefabricated sandwich heat-insulating hollow superposed shear wall, so that the integrated construction of the prefabricated outer wall structure, heat insulation and decoration is realized, the defect that the integrated construction of the structure, the heat insulation and the decoration is difficult to realize by other superposed shear wall systems is avoided, and the complex vertical surfaces such as bay windows and the like can be realized.
(5) The prefabricated hollow superposed shear wall has light dead weight, the vertically distributed reinforcing steel bars are connected in a lap joint mode, the edge components penetrate through the vertically stressed reinforcing steel bars, the conventional prefabricated wall sleeve grouting joint reinforcing steel bar alignment and joint grouting construction can be avoided, the field installation efficiency is high, and the construction period is saved.
(6) According to the invention, the prefabricated wall and the horizontal post-cast strip are connected into a whole by post-casting concrete in the vertical hole, the structural integrity is good, the design can be carried out by adopting a structural design method of a cast-in-place shear wall, and the popularization is convenient.
Drawings
Fig. 1 is a three-dimensional schematic view of a prefabricated hollow superposed shear wall with rear-through edge member vertical steel bars, and the three-dimensional schematic view simultaneously shows vertical stressed steel bars and additional connecting steel bars of an edge member in a vertical hole which is rear-through on site.
Fig. 2 is a three-dimensional schematic view of the prefabricated hollow superimposed shear wall shown in fig. 1, wherein the hand holes are formed in the root parts of the edge members and the vertical stressed steel bars are connected with the edge members in the vertical holes.
Fig. 3 is a front view of the prefabricated hollow composite shear wall of fig. 1.
Fig. 4 is a schematic cross-sectional view of fig. 3 taken along line 1-1 and line 2-2.
Fig. 5 is a schematic cross-sectional view of a-A, B-B and C-C of fig. 3.
FIG. 6 is a three-dimensional schematic view of the shaped pipe for forming holes and the mounting hand holes at the edge members of FIG. 1.
Fig. 7 is a three-dimensional schematic view of the shaped pipe for forming holes at the wall position in fig. 1.
Fig. 8 is a top cross-sectional view of the in-line prefabricated edge component of fig. 1.
Fig. 9 is a structural schematic diagram of vertical stressed steel bar connection and horizontal joint of edge members of the upper and lower prefabricated walls in the prefabricated hollow superposed shear wall structure.
Fig. 10 is a schematic structural view of the lap joint of the vertically distributed reinforcing steel bars of the upper and lower prefabricated walls in the prefabricated hollow superposed shear wall structure of the invention and four adjacent vertically distributed reinforcing steel bars by using a single additional connecting reinforcing steel bar.
Fig. 11 is a schematic structural view of the upper and lower layers of vertical distribution steel bars of the prefabricated wall in the prefabricated hollow superimposed shear wall structure of the invention, which are connected with four adjacent vertical distribution steel bars in a lap joint manner by using two additional connecting steel bars.
Fig. 12 is a top cross-sectional view of a straight edge member with three vertical holes and three vertical stressed steel bars passing through the edge member.
FIG. 13 is a top cross-sectional view of an L-shaped prefabricated edge component.
FIG. 14 is a top cross-sectional view of a T-shaped preform construction edge member.
FIG. 15 is a top cross-sectional view of a T-shaped preformed constraining edge member.
Fig. 16 is a three-dimensional schematic view of an improved thermal insulation, decoration and structure integration of the prefabricated hollow superposed shear wall shown in fig. 1, namely, the prefabricated sandwich thermal insulation hollow superposed shear wall.
In the figure: 1-an edge member region; 2-wall area; 3-a beam connecting area; 4-door opening; 11-shaping pipeline for forming holes on the edge member; 12-edge member root mounting hand holes; 121-fixedly mounting a pre-buried internal thread sleeve for the hand hole template; 13-prefabricating vertical constructional steel bars of the wall inner edge component; 14-edge member stirrup; 15-edge member lacing; 16-penetrating edge components in the vertical holes and vertically stressed steel bars; 161-edge member vertical stressed steel bar thread joint; 21-forming a shaping pipeline for wall hole forming; 22-a horizontal inner groove at the bottom of the wall body; 23-vertically distributing reinforcing steel bars; 24-additional connecting steel bars; 241-transverse reinforcing steel bars for additionally connecting the reinforcing steel bars; 25-vertically distributing tie bars in a steel bar lap joint area; 26-leveling the prefabricated wall by using a pre-embedded internal thread sleeve; 31-connecting the bottom longitudinal bars of the beam; 32-lacing wires in the anchoring area of the longitudinal ribs at the bottom of the coupling beam; 33-connecting beam stirrups; 34-connecting the top longitudinal bars of the beam; 51-horizontal joints at the bottom of the prefabricated wall; 52-horizontal post-cast strip at the top of the prefabricated wall; 53-prefabricating a floor slab; 61-prefabricating a hollow superposed shear wall; 62-insulating layer; 63-outer leaf wallboard.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1 to 16, a prefabricated hollow superposed shear wall with rear penetrating edge member vertical steel bars mainly comprises an edge member area 1 and a wall body area 2.
A further optimization and improvement of the invention is in the edge member region 1. The edge member region 1 adopts a shaping pipeline 11 for forming the hole of the edge member to form a vertical hole of the edge member, and an installation hand hole 12 is reserved at the root part of the edge member region 1 at the vertical hole of the edge member. Only arranging vertical constructional steel bars 13 with small diameters, edge component stirrups 14 and tie bars 15 in an edge component area 1 in the prefabricated wall to form a steel bar framework, wherein the vertical constructional steel bars 13 are arranged outside the range of vertical holes of the edge component and do not participate in stress calculation; after the prefabricated wall is installed on a construction site, the vertical stressed steel bars 16 of the edge members penetrate through the vertical holes of the edge members, and the connection of the vertical stressed steel bars 16 of the edge members penetrating through the upper-layer wall body and the lower-layer wall body is realized by adopting the steel bar threaded joints 161 in the installation hand holes 12. The side forms do not have holes in the production stage of the prefabricated wall, so that the standardization and the universalization of the forms can be realized, and the finished product protection in the transportation and hoisting processes is facilitated.
Namely, the invention adopts the large-diameter rear-through edge component vertical stress steel bars 16 to replace a plurality of small-diameter edge component vertical steel bars of the traditional shear wall, the rear-through edge component vertical stress steel bars 16 participate in structural stress calculation, the reinforcement area meets the requirement of the normal section pressure bearing checking calculation of the shear wall, or replaces a plurality of small-diameter edge component vertical steel bars of the traditional shear wall according to the principle of equal area replacement of the steel bars of the same strength grade, the replacement principle is that 2 rear-through edge component vertical stress steel bars 16 with the diameter of 22mm replace 6 steel bars with the diameter of 12mm, 2 rear-through edge component vertical stress steel bars 16 with the diameter of 25mm replace 6 steel bars with the diameter of 14mm, and 2 rear-through edge component vertical stress steel bars 16 with the diameter of 28mm replace 6 steel bars with the diameter of 16 mm.
In order to penetrate through the edge member vertical stress reinforcing steel bars 16 after site construction, edge member vertical holes penetrating the height of the wall body are formed by adopting the edge member hole-forming shaping pipeline 11 in the production stage of the prefabricated wall; in order to realize the lap joint of the vertically distributed reinforcing steel bars 23 of the upper and lower prefabricated walls, a wall body vertical hole which runs through the height of the wall body is formed by adopting a wall body hole-forming shaping pipeline 21 in the production stage of the prefabricated wall; after the reinforcing steel bars in the vertical holes are laid, pouring concrete in the vertical holes to complete the connection of the prefabricated wall; the prefabricated wall is formed by one-step pouring through a fixed mould platform production line or a flat mould flow production line.
For the linear edge member, two edge member vertical holes can be formed by adopting two edge member hole-forming shaping pipelines 11, the sections of the edge member hole-forming shaping pipelines 11 are the same from top to bottom, and circular, rectangular or other section forms can be adopted according to requirements; the shaping pipeline 11 for forming the hole by the edge member can be made by rolling and folding a thin-wall steel plate with patterns or protrusions on the surface, a metal corrugated pipe can be adopted when the circular section is formed, and the size along the thickness of the wall body and the length direction of the wall body is not suitable to be less than 80 mm. When the area of the vertical steel bars of the linear edge member is larger than a set value in the calculation process, three edge member hole-forming shaping pipelines 11 are adopted in the edge member region 1 to form three vertical holes, and three vertical stressed steel bars 16 of the rear penetrating edge member are penetrated later to control the diameter of the vertical stressed steel bars.
When the prefabricated wall comprises L-shaped and T-shaped prefabricated edge components, the L-shaped and T-shaped edge component ranges, stirrups and tie bar structures are the same as those of a cast-in-place shear wall, a plurality of edge component vertical holes are formed in the edge component ranges by adopting a plurality of edge component hole-forming shaping pipelines 11, a rear edge component vertical stressed steel bar 16 penetrates through each edge component vertical hole, and the installation hand hole 12 range is adjusted according to the edge component ranges, the operation requirements of the steel bar threaded connector 161 and the floor slab position.
According to the invention, a rear edge penetrating member vertical stressed steel bar 16 is arranged in each edge member hole forming shaped pipeline 11 along the thickness center line of the wall body, and on the basis of meeting the requirements of construction of a steel bar threaded joint 161 in an installation hand hole 12 and rear pouring concrete in a vertical hole, the rear edge penetrating member vertical stressed steel bar 16 is arranged on one side of the edge member hole forming shaped pipeline 11.
The mounting hand hole 12 can be formed by occupying the forming occupation block, and the size of the mounting hand hole is required to meet the operation space requirement when the reinforcing steel bar threaded joint 161 is mounted; the wall thickness of the concrete around the mounting hand hole 12 is not less than 40mm, so that the concrete wall is prevented from cracking in the process of pouring the concrete after the vertical hole is poured in situ; within the range of the mounting hand hole 12, the vertical constructional steel bars 13 positioned in the concrete wall are kept continuous, and the rest vertical constructional steel bars 13 are cut off; the internal thread sleeves 121 are pre-embedded in the precast wall concrete on two sides of the mounting hand hole 12 and used for fixedly mounting the hand hole sealing template on site.
When the prefabricated wall is installed on site, the horizontal joint 51 at the bottom of the prefabricated wall is arranged at the elevation of the floor, and in order to ensure the compactness of post-cast concrete at the horizontal joint 51 at the bottom of the prefabricated wall, the distance between the bottom of the prefabricated wall and the top of the floor slab is not less than 50 mm; at least two internal thread sleeves 26 are pre-buried at the bottom of the prefabricated wall, bolts are screwed into the internal thread sleeves 26 in a construction site, and the bolts are used for controlling the height of a horizontal joint 51 at the bottom of the prefabricated wall and adjusting the levelness of the prefabricated wall; when the distance between the shaping pipelines 21 for wall pore-forming is larger than a set value, in order to ensure the compactness of the cast-in-place concrete after the horizontal joint 51 at the bottom of the prefabricated wall at the position, a horizontal inner groove 22 is arranged at the bottom of the wall, and the horizontal inner groove 22 is formed by template forming or space occupying; the height of the horizontal inner groove 22 is not less than 80mm, the cross section is a trapezoidal cross section with a narrow top and a wide bottom, and the width of the upper bottom of the trapezoidal cross section is not less than 80 mm.
Within the length range of the connecting beam bottom longitudinal rib 31, the vertical structural steel bars 13 and the vertical distribution steel bars 23 in the prefabricated wall are inwards bent at the upper part of the wall body to penetrate through the inner side of the connecting beam bottom longitudinal rib 31, so that the connecting beam bottom longitudinal rib 31 is ensured to be linearly arranged without being bent; the bending angles of the vertical constructional steel bars 13 and the vertical distribution steel bars 23 of the edge members in the prefabricated wall are not more than 1:6, the prefabricated wall is uniformly distributed outside the shaping pipelines 11 for forming the holes of the edge members and the shaping pipelines 21 for forming the holes of the wall body, and the prefabricated wall steel bar cage is relatively independent from the shaping pipelines so as to facilitate the installation of the shaping pipelines.
The prefabricated hollow superposed shear wall 61, the heat-insulating layer 62 and the outer leaf wall plate 63 can be integrally prefabricated in a factory to form the prefabricated sandwich heat-insulating hollow superposed shear wall, so that the heat insulation, decoration and structure integration of the prefabricated outer wall is realized; the prefabricated hollow superposed shear wall and the outer leaf wall plate are pulled and connected by adopting a heat-insulating pull piece; the prefabricated sandwich heat-insulating hollow superposed shear wall can be produced by adopting a forward beating method or a backward beating method, and the construction procedures of the outer leaf wall plate, the heat-insulating layer and the heat-insulating drawknot piece are added.
Referring to fig. 1 to 8, a first preferred embodiment of the present invention includes an edge member region 1, a wall body region 2, a coupling beam region 3, and a door opening 4. It should be noted that the edge member region 1 and the wall body region 2 can be independently used for the prefabricated hollow superposed shear wall of the vertical reinforcing steel bars of the rear-through edge member. The embodiment is to more fully illustrate the scheme of the invention, and the prefabricated hollow superposed shear wall comprises the coupling beam area 3 and the door opening 4, but does not represent the prefabricated hollow superposed shear wall with the vertical steel bars of the rear-through edge member, which is provided by the invention, must be used for the prefabricated shear wall comprising the coupling beam area 3 and the door opening 4.
The invention comprehensively considers the advantages and disadvantages of the existing precast shear wall technology, and the internal vertical hole is formed by adopting a shaping pipeline. In the edge component part, only vertical constructional steel bars 13 and stirrups 14 are arranged in the edge component of the prefabricated wall, a large-diameter rear-penetrating edge component vertical stressed steel bar 16 is adopted to replace a plurality of small-diameter edge component vertical steel bars of the traditional shear wall, the edge component vertical stressed steel bar is arranged in a vertical hole of the edge component in a construction site in a penetrating manner, and a mounting hand hole 12 is arranged at the root part of the prefabricated wall to realize the connection of threaded joints 161 of the vertical stressed steel bars 16 in the vertical hole; the vertically distributed rebars 23 of the wall section are connected by additional connecting rebar lap joints 24. The prefabricated wall can be formed at one time without using special pore-forming equipment, can be produced on the existing production lines such as a fixed mold table production line, a flat mold flow production line and the like with large quantity of domestic prefabricated part factories at present, and has relatively simple production process; the vertical structure reinforcing steel bars 13 of the edge members and the vertical distribution reinforcing steel bars 23 of the wall body do not extend out of the prefabricated wall, side forms can be prevented from being perforated in the production stage of the prefabricated wall, mold standardization and universalization can be achieved, production efficiency is improved, the cost of the prefabricated members is controlled, and transportation and finished product protection in the hoisting process are facilitated.
The in-line edge member region 1 of the first preferred embodiment of the present invention uses two identical edge member hole-forming shaped pipes 11 to form two edge member vertical holes. Only small-diameter vertical constructional steel bars 13, edge component stirrups 14 and tie bars 15 are arranged in the area of an inner edge component of the prefabricated wall to form a steel bar framework, and the structures of the edge component stirrups 14 and the tie bars 15 are consistent with those of a common cast-in-place shear wall; the vertical constructional steel bars 13 are arranged outside the range of the vertical holes of the edge members, do not extend out of the prefabricated wall and do not participate in stress calculation. The vertical stressed reinforcing steel bars 16 of the large-diameter edge components are adopted to replace a plurality of vertical reinforced steel bars of the small-diameter edge components of the traditional shear wall, after the prefabricated wall is installed on a construction site, the vertical stressed reinforcing steel bars 16 of the large-diameter edge components penetrate through the vertical holes of the edge components, the root parts of the edge components of the prefabricated wall are reserved with installation hand holes 12, and the connection of the vertical stressed reinforcing steel bars 16 of the edge components penetrating through the upper layer wall body and the lower layer wall body is realized by adopting reinforcing steel bar threaded joints 161 in the installation hand holes 12.
Edge component pore-forming is with design pipeline 11 from the top down the cross-section the same, can adopt circular, rectangle or other cross-sectional forms as required, wears the vertical atress reinforcing bar 16 of edge component after laying in every edge component pore-forming is with design pipeline 11, and the pipeline should not be less than 80mm along wall thickness, wall length direction's size to guarantee the pouring quality of post-cast concrete in the vertical hole.
The vertical atress reinforcing bar 16 of edge member is worn to back arranges along wall thickness central line, and on satisfying the basis of bar screwed joint 161 construction in mounting hand hole 12, the downthehole post-cast in concrete pouring demand of vertical, the vertical atress reinforcing bar 16 of edge member is worn to back arranges on one side that leans on one side in design pipeline 11 to reduce the vertical hole size of edge member, be convenient for the reinforcing bar arrange and edge member pore-forming is with design pipeline 11 cost control.
Wear the vertical atress reinforcing bar 16 of marginal component after and participate in the structure atress calculation, the arrangement of reinforcement area should satisfy the shear force wall positive cross-section pressurized and bear the checking calculation requirement, also can replace many minor diameter marginal component vertical reinforcing bars of traditional shear force wall according to the principle that equal area of same intensity grade reinforcing bar was substituted, the substitution principle is that 2 diameter 22mm reinforcing bars replace 6 diameter 12mm reinforcing bars, 2 diameter 25mm reinforcing bars replace 6 diameter 14mm reinforcing bars, 2 diameter 28mm reinforcing bars replace 6 diameter 16mm reinforcing bars.
As shown in fig. 2, the hand hole 12 for installing the root part of the edge member of the prefabricated wall is formed by occupying the space of the shaped occupying block, and the size of the hand hole meets the requirement of the installation of the threaded joint 161 of the reinforcing steel bar on the construction space; after the mounting hand holes 12 are reserved, the wall thickness of concrete at the periphery of the hand holes is not smaller than 40mm, so that the concrete wall is prevented from cracking in the process of pouring concrete after the vertical holes are poured in situ; within the range of the hand hole, the vertical constructional steel bars 13 positioned in the concrete wall keep continuous, and the rest vertical constructional steel bars 13 are cut off; the internal thread sleeves 121 are pre-embedded in the precast wall concrete on two sides of the mounting hand hole, and are used for fixing the sealing template of the mounting hand hole 12 on site, so that the site construction efficiency is improved.
The vertical hole at the wall position is formed by adopting a shaping pipeline 21 for wall hole forming, the shaping pipeline 21 for wall hole forming can adopt the same section shape and size from top to bottom, the section of the shaping pipeline 21 for wall hole forming in the preferred embodiment is circular, and can also adopt a rectangular or other section, and the size along the thickness and length direction of the prefabricated wall is not less than 70 mm; and a shaping pipeline 21 for wall body pore-forming is arranged at the center of every two columns of vertically distributed reinforcing steel bars 23 to form vertical holes.
The vertically distributed reinforcing steel bars 23 do not extend out of the top surface and the bottom surface of the prefabricated wall, as shown in fig. 10, an additional connecting reinforcing steel bar 24 is arranged near the elevation of the vertical hole floor of the shaping pipeline 21 for forming the hole in the wall body, and is in lap joint with four adjacent vertically distributed reinforcing steel bars 23 in the prefabricated wall; in the lapping range of the vertically distributed reinforcing steel bars, the lacing bars 25 of the two layers of reinforcing steel bar meshes of the lacing prefabricated wall are encrypted, and the crossing position of each vertically distributed reinforcing steel bar 23 and each horizontally distributed reinforcing steel bar is provided with one lacing bar 25. In addition, as shown in fig. 11, two additional connecting steel bars 24 are arranged near the floor elevation of the vertical hole of the shaped pipeline 21 for wall hole forming, and are connected with four adjacent vertical distribution steel bars 23 in the prefabricated wall in an overlapping manner; the transverse reinforcing bars 241 can be welded at the upper end and the lower end of the two additional connecting reinforcing bars 24 to form ladder reinforcing bars, so that the additional connecting reinforcing bars 24 can be conveniently fixed on site, and the force transmission performance is improved. No matter one or two additional connecting steel bars 24 are adopted, the total area of the additional connecting steel bars 24 in the vertical hole of the single shaping pipeline 21 for wall hole forming is not less than the total area of the four vertical distribution steel bars 23 in lap joint with the additional connecting steel bars.
The edge member pore-forming shaping pipeline 11 and the wall position pore-forming shaping pipeline 21 are made of metal materials, and can be made of thin-wall steel plates with patterns or protrusions on the surfaces in a winding mode, and the circular-section pipeline can be made of metal corrugated pipes.
As shown in fig. 5, within the range of the length of the connecting beam bottom longitudinal rib 31, the vertical structural reinforcing steel bars 13 and the vertical distribution reinforcing steel bars 23 of the prefabricated wall inner edge member are bent at the upper part of the wall body to penetrate through the inner side of the connecting beam bottom longitudinal rib 31, so that the connecting beam bottom longitudinal rib 31 is ensured to be linearly arranged without bending. The bending angles of the vertical constructional steel bars 13 and the vertical distribution steel bars 23 are not more than 1:6, and the length of the bending section is controlled so as to facilitate the arrangement of the edge member stirrups 14. The tie bars 32 are arranged one by one at the crossing positions of the connecting beam bottom longitudinal bars 31 and the vertical steel bars within the anchoring range of the wall bodies on the two sides, so that the anchoring performance of the connecting beam bottom longitudinal bars 31 in the wall bodies on the two sides is improved.
As shown in fig. 9 to 11, when the prefabricated wall is installed on site, the horizontal joint 51 at the bottom of the prefabricated wall should be set at the level of the floor, and in order to ensure the compactness of the post-cast concrete at the horizontal joint 51 at the bottom of the prefabricated wall, the distance between the bottom of the prefabricated wall and the top of the floor slab should not be less than 50 mm. At least two internal thread sleeves 26 are pre-buried at the bottom of the prefabricated wall, bolts are screwed into the internal thread sleeves 26 in a construction site, and the bolts are used for controlling the height of the horizontal joint 51 at the bottom of the prefabricated wall and adjusting the levelness of the prefabricated wall.
Especially, the wall body is that the space is great with design pipeline 21, for the closely knit nature of guaranteeing above-mentioned position horizontal joint post-cast concrete, sets up horizontal inner groovy 22 at wall body and under the window bottom, and horizontal inner groovy 22 can adopt the template shaping or occupy the place and form. The height of the horizontal inner groove 22 is not lower than 80mm, the cross section is a trapezoidal cross section with a narrow top and a wide bottom, and the width of the upper bottom of the trapezoidal cross section is not lower than 80 mm.
When the side surface of the prefabricated hollow superposed shear wall needs to extend out of the horizontally distributed reinforcing steel bars to be connected with the adjacent prefabricated hollow superposed shear wall or the cast-in-place shear wall, the structure of the horizontally distributed reinforcing steel bars and the structure of the vertical joint are extended out of the design specifications of prefabricated concrete building technical standards, prefabricated concrete structure technical regulations and the like.
The prefabrication production process of the prefabricated hollow superposed shear wall in the preferred embodiment comprises the following steps of: binding a shear wall steel reinforcement framework, laying a shaping pipeline in the steel reinforcement framework, installing a prefabricated wall side die, a horizontal inner groove die and an installation hand hole occupying block, positioning the shaping pipeline, pouring concrete to form an internal vertical hole, and curing, shaping and demolding. The field construction process comprises the following steps: the prefabricated hollow superimposed shear wall of installation, the prefabricated wall of adjustment hangs down straightness, the levelness, wear to establish back edge member vertical atress reinforcing bar 16 and accomplish reinforcing bar screwed joint 161 construction in installation hand hole 12 in the design pipeline 11 for the edge member pore-forming, lay additional connecting reinforcement 24 at wall body pore-forming with design pipeline 21 floor elevation department, with the help of pre-buried internal thread sleeve 121 fixed mounting hand hole 12's sealing template, prop up and establish horizontal seam template, pour the vertical downthehole post-cast concrete and realize the prefabricated wall and connect, maintenance form removal.
In particular, when the vertical reinforcement calculation reinforcement area of the edge member is large, two vertical stressed reinforcements 16 of the rear-penetrating edge member are configured according to fig. 8, so that the diameter of the reinforcements is large, and the construction of the reinforcement threaded joint 161 and the post-cast concrete pouring in the vertical hole are not facilitated. At this time, three edge member forming shaping pipelines 11 can be adopted in the edge members according to fig. 12 to form three vertical holes, three edge member vertical stress steel bars 16 are penetrated through the three edge members to control the diameter of the three vertical holes, and the principle of reinforcing the vertical stress steel bars 16 is the same as that of the prior art.
Fig. 13, 14 and 15 are second, third and fourth preferred embodiments of the invention for an L-shaped prefabricated edge member, a T-shaped prefabricated member edge member and a T-shaped prefabricated constrained edge member, respectively, where the edge member range, the stirrup and the tie bar construction are the same as those of a cast-in-place shear wall, a plurality of edge member vertical holes are formed in the edge member range by using a plurality of edge member hole-forming shaping pipelines 11, a rear penetrating edge member vertical stressed steel bar 16 penetrates behind each edge member vertical hole, the installation hand hole 12 range is adjusted according to the edge member range, the steel bar threaded joint 161 operation requirement and the floor slab position, and the reinforcement distribution principle and the construction requirement of the rear penetrating edge member vertical stressed steel bar 16 are the same as those of the front.
The first to fourth prefabricated hollow superposed shear walls of the preferred embodiment are structural walls, and can be used for building external walls or internal walls, and further, as shown in fig. 16, the prefabricated hollow superposed shear wall 61, the heat insulation layer 62 and the external leaf wall plate 63 can be integrally prefabricated in a factory to form the prefabricated sandwich heat insulation hollow superposed shear wall, so that the heat insulation, decoration and structural integration of the prefabricated external wall is realized. The prefabricated hollow superposed shear wall and the outer leaf wall plate are tied by adopting a heat-insulating tie piece. At the moment, the prefabricated sandwich heat-insulation hollow superposed shear wall can be produced by adopting a forward beating method or a backward beating method, and the construction procedures of the outer leaf wall plate, the heat-insulation layer and the heat-insulation tie piece are added.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes and substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
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| CN111851787A (en) * | 2020-06-12 | 2020-10-30 | 中国建筑标准设计研究院有限公司 | Take entrance to a cave superimposed shear wall to go out muscle connected node structure in side of indulging and violently wall |
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