WO2018196309A1 - 一种预制再生块体混凝土梁的连接构造及其施工方法 - Google Patents

一种预制再生块体混凝土梁的连接构造及其施工方法 Download PDF

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Publication number
WO2018196309A1
WO2018196309A1 PCT/CN2017/107908 CN2017107908W WO2018196309A1 WO 2018196309 A1 WO2018196309 A1 WO 2018196309A1 CN 2017107908 W CN2017107908 W CN 2017107908W WO 2018196309 A1 WO2018196309 A1 WO 2018196309A1
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Prior art keywords
prefabricated
column
concrete
leg
steel
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English (en)
French (fr)
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吴波
何国晖
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4114—Elements with sockets
    • E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/22—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members built-up by elements jointed in line
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/18—Spacers of metal or substantially of metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention relates to the technical field of waste concrete recycling, in particular to a joint structure of a prefabricated recycled concrete beam and a construction method thereof.
  • waste concrete blocks With the deterioration of environmental problems, the recycling of waste concrete has attracted widespread attention at home and abroad. Compared with the traditional recycled coarse aggregate and recycled fine aggregate, the use of larger scale waste concrete blocks not only has the advantages of high crushing efficiency, low crushing energy consumption, but also significantly reduces the amount of subsequent cement, and the environmental protection and energy saving benefits are obvious. . At the same time, the country is focusing on the Beijing-Tianjin-Hebei, Yangtze River Delta, Pearl River Delta urban agglomerations and other cities with a permanent population of more than 3 million, and vigorously develop prefabricated buildings. The use of waste concrete blocks to reproduce prefabricated concrete members has become an effective way to solve the recycling problems of waste concrete.
  • the joint structure between adjacent prefabricated members has an important influence on the overall mechanical properties of the precast concrete structure.
  • the wet connection method of pouring a large amount of concrete on site has a great influence on the environment and the construction speed is relatively slow. Therefore, it is urgent to develop a connection structure and a construction method of a precast recycled block concrete member with a splicing portion away from the core portion of the node and having a small amount of on-site pouring.
  • the object of the present invention is to provide a joint structure of a prefabricated regenerated block concrete beam and a construction method thereof, that is, a prefabricated prefabricated beam and a notched prefabricated beam are prepared in advance at the factory, and then at the construction site. The operative connection is made and a high-strength micro-expansion type inorganic adhesive material is poured into the gap between the two.
  • the invention relates to a joint structure of a prefabricated regenerated block concrete beam and a construction method thereof, which not only moves the joint portion between adjacent prefabricated components to the vicinity of the beam end away from the core portion of the node, but also has a small amount of on-site pouring, effective It solves the problem of concrete pouring quality caused by the intensive steel bars in the core area of the node, and can obviously improve the construction speed on site.
  • the thickness of the concrete protective layer of the axial channel filled with the organic structural rubber or the inorganic structural adhesive is obvious because the longitudinal reinforcement is used in the prefabricated pre-fabricated preforms and the pre-formed beams with the ends.
  • the increase can effectively alleviate the deterioration of the structural adhesive by the high temperature of the fire, thereby ensuring the effectiveness of the connection between the prefabricated beef leg and the pre-formed girder with the end of the column, so that the beam has good fire resistance. Further, by adopting the longitudinal reinforcement after the bending treatment, the bending resistance of the joint region of the prefabricated beef leg and the end notched precast beam with the column is artificially weakened, and the joint region will be yielded first by earthquake. Plastic hinge to ensure The realization of the seismic design idea of "strong column weak beam".
  • One aspect of the present invention provides a joint structure of a prefabricated regenerated block concrete beam, comprising a prefabricated beef leg, a pre-formed beam with a notch at the end, a perforated positioning plate, a standing rib, a stirrup, and a common longitudinal rib.
  • Longitudinal bars after bending treatment steel sleeves with internal threads, steel bars with external threads, shear steel, axial holes;
  • the lower part of the bovine leg prefabricated with the column is provided with a perforated positioning plate, a longitudinal reinforcement after bending, and a shear-resistant steel;
  • the upper part of the pre-formed beam with a notch at the end is provided with a perforated positioning plate, and the longitudinal direction after the bending treatment a rib and a shear-resistant steel;
  • the hole-positioning plate is pre-drilled with a hole, and the end of the longitudinal rib after the bending process is machined with an external thread, and each hole corresponds to a longitudinal rib after bending, and the position of the hole is The position of the longitudinal rib before bending is closer to the center of the cross section of the beam;
  • the bent longitudinal rib passes through a pre-drilled hole in the perforated locating plate and is then threadedly connected to one end of the internally threaded steel sleeve; the other end of the internally threaded steel sleeve is externally threaded Reinforced rods for threaded connection;
  • An axial hole is reserved in the lower part of the upper and the end of the prefabricated prefabricated beam of the prefabricated beef leg, and the axial hole is filled with organic structural glue or inorganic structural glue, and each axial hole corresponds to one out-of-band Threaded reinforcing bars, each of which has an externally threaded reinforcing bar extending into the corresponding axial bore;
  • the pre-formed beam with the notch at the end is placed on the bobs prefabricated with the column, and the gap between the two is filled with a high-strength micro-expansion type inorganic adhesive material.
  • the depth of the axial bore is not less than 15d, and the length of the externally threaded reinforcing bar and the internally threaded steel sleeve is not less than 18d, and d is the diameter of the longitudinal rib.
  • Another aspect of the present invention provides a construction method of a joint structure of a prefabricated regenerated block concrete beam as described, comprising the following steps:
  • Step 1 Complete the bent longitudinal ribs, the perforated positioning plates, the internally threaded steel sleeves, the externally threaded steel bars in the prefabricated prefabricated beams and the prefabricated prefabricated beams at the ends according to the design requirements. Setting and connection of rods and ordinary longitudinal bars;
  • Step 2 According to the design requirements, complete the setting of the pre-fabricated anti-shear steel, the temporary embedded round bar, the standing rib and the stirrup in the pre-fabricated beef leg and the end with the column, and erect the template;
  • Step 3 Pour a small amount of new concrete into the formwork in a horizontal lying manner, and then put the fully wetted concrete block into the interior of the formwork, and then continuously pour the new concrete and fully vibrate; after the concrete is initially set, Temporarily pre-embedded round bars are taken out to form axial bores, and the prefabricated preforms are prepared with the bovine legs and the ends with the columns prefabricated;
  • Step 4 At the construction site, complete the erection of the prefabricated beef legs and the prefabricated prefabricated beams at the ends, so that the externally threaded reinforcing bars extend into the axial bore filled with the structural adhesive, simultaneously with the column. An inorganic adhesive material is poured into the gap between the prefabricated beef leg and the end of the gapped precast beam.
  • step 1 specifically includes:
  • Step 11 Locating the longitudinal ribs after the bending of the externally threaded ribs at the upper portion of the bovine leg prefabricated with the column and the upper end of the notched prefabricated beam, and passing the bent longitudinal ribs through the belt Pre-drilled holes in the hole positioning plate and spot welding positioning;
  • Step 12 Threading one end of the internally threaded steel sleeve with the end of the bent longitudinal rib and spot welding, and the other end of the internally threaded steel sleeve is connected with the externally threaded reinforcing bar Threaded and screwing most of the externally threaded steel rod into the internally threaded steel sleeve;
  • Step 13 A normal longitudinal rib is provided at the upper portion of the bovine leg prefabricated with the column and the lower portion of the pre-formed beam at the end.
  • step 2 specifically includes:
  • Step 21 providing shear-resistant steel on the lower part of the bovine leg prefabricated with the column and the upper part of the pre-formed beam with a notch at the end;
  • Step 23 Set up the ribs and tie the stirrups to set up the template.
  • the mass ratio of the new concrete to the waste concrete block in the step 3 is 1:1 to 4:1.
  • step 4 specifically includes:
  • Step 41 In the construction site, inject the organic structural adhesive or the inorganic structural adhesive into the lower axial bore of the upper pre-formed beam of the bovine leg prefabricated with the column and the end of the pre-formed beam with the notch, and in the axial bore Apply sealing paper to the opening;
  • Step 42 Finishing the lifting of the beef leg prefabricated with the column
  • Step 43 lifting the notched prefabricated beam at the end and placing it on the pre-fabricated beef leg with the column, and in the gap between the connecting areas, the majority of the screw is screwed into the belt
  • the externally threaded reinforcing bar of the threaded steel sleeve is gradually unscrewed, so that the externally threaded reinforcing bar pierces the sealing paper and extends into the axial bore;
  • Step 44 Injecting a high-strength micro-expansion type inorganic adhesive material into a gap between the joint portion of the pre-fabricated beef leg and the end-notched precast beam.
  • the present invention has the following advantages and effects:
  • the thickness of the concrete protective layer of the axial channel filled with the organic structural adhesive or the inorganic structural adhesive is obvious by using the bent longitudinal ribs in the prefabricated beef legs and the prefabricated prefabricated beams at the ends.
  • the increase can effectively alleviate the deterioration of the structural adhesive by the high temperature of the fire, thereby ensuring the effective connection of the joint region between the prefabricated beef leg and the pre-formed beam with the notch at the end, so that the beam has good fire resistance.
  • Figure 1 is a schematic view showing the connection structure of a precast recycled bulk concrete beam
  • a joint structure of a prefabricated regenerated block concrete beam including a prefabricated beef leg 1 with a post and a notched precast beam 2 , with hole positioning plate 4, frame rib 9, stirrup 11, general longitudinal reinforcement 8, longitudinal reinforcement after bending, 3, steel sleeve with internal thread 5, steel rod with external thread 6, shear steel 10 and axial bore 7.
  • the full cross section of the beef leg 1 prefabricated with the column is 350
  • the dimensions of the complete section of the prefabricated beam 2 with mm ⁇ 600 mm and notched at the end are 350
  • the diameter of mm ⁇ 600 mm, the standing rib 9 and the stirrup 11 is 10 mm
  • the diameter of the longitudinal rib 3 and the ordinary longitudinal rib 8 after the bending treatment are 20 mm.
  • the upper portion of the bobbin 1 prefabricated with the column and the upper portion of the endless notched precast beam 2 are provided with a perforated positioning plate 4, three bent longitudinal bars 3 and a shear-resistant steel 10.
  • the perforated positioning plate 4 has a thickness of 25 mm, and the perforated positioning plate 4 is pre-drilled with three holes, and the end portions of the longitudinal ribs 3 after the bending process are machined with external threads, and each hole corresponds to a longitudinally bent process.
  • the rib 3 has a hole position closer to the center of the cross section of the constituting beam than the position of the longitudinal rib before bending.
  • the distance between the position of the longitudinal ribs 3 after the three bending treatments and the position of the longitudinal ribs before the bending is 60 mm in the vertical direction, and the position of the longitudinal ribs 3 after the two outer bending treatments corresponds to The distance between the longitudinal rib positions before bending is 70 mm in the horizontal direction.
  • the shear-resistant steel 10 is selected from the model 18 I-beam and has a length of 360 mm.
  • the bent longitudinal rib 3 passes through a pre-drilled hole in the perforated positioning plate 4 and is then threadedly coupled to one end of the internally threaded steel sleeve 5.
  • the other end of the internally threaded steel sleeve 5 is threadedly connected to the externally threaded reinforcing bar 6.
  • the internally threaded steel sleeve 5 has an inner diameter of 20 mm, an outer diameter of 31 mm and a length of 360 mm, and the externally threaded reinforcing bar 6 has a diameter of 20 mm and a length of 360 mm.
  • the lower portion of the upper and end notched prefabricated beams 2 of the bobs 1 which are prefabricated simultaneously with the column are provided with axial bores 7, which have an aperture of 25 mm and a depth of 300 mm.
  • the axial bore 7 is filled with an organic structural adhesive or an inorganic structural adhesive, and each axial bore 7 corresponds to an externally threaded reinforcing bar 6, and each externally threaded reinforcing bar 6 projects into the corresponding axial bore 7. .
  • the pre-formed beam 2 with the notch at the end is placed on the bobbin 1 prefabricated with the column, and the overlap length of the two is 250 mm.
  • the gap between the two is filled with a high-strength micro-expansion type inorganic adhesive material. .
  • a construction method for a joint structure of a prefabricated regenerated block concrete beam comprising the following steps:
  • Step 1 the longitudinally rib 3, the perforated positioning plate 4, and the internally threaded steel sleeve 5 in the prefabricated preform 2 and the pre-formed beam 2 with the end of the notch are completed.
  • the arrangement and connection of the externally threaded reinforcing bar 6 and the ordinary longitudinal rib 8 include:
  • Step 11 On the upper part of the prefabricated beam 2 prefabricated with the column and the upper end of the notched prefabricated beam 2, the longitudinal rib 3 which is bent at the end is machined with an external thread, and the longitudinal rib after the bending process is processed. 3 passing through the pre-drilled holes in the perforated positioning plate 4 and spot welding positioning;
  • Step 12 Threading one end of the internally threaded steel sleeve 5 with the end of the bent longitudinal rib 3 and spot welding, the other end of the internally threaded steel sleeve 5 and the externally threaded The reinforcing bar 6 is screwed, and the majority of the externally threaded reinforcing bar 6 is screwed into the internally threaded steel sleeve 5;
  • Step 13 A normal longitudinal rib 8 is provided at the upper portion of the beef leg 1 prefabricated with the column and the lower portion of the endless notched precast beam 2.
  • Step 2 complete the setting of the shear-type steel 10, the temporary embedded round bar, the standing rib 9 and the stirrup 11 in the prefabricated beam 1 and the end-notched precast beam 2, and erect the template. Specifically, including:
  • Step 21 at the same time as the prefabricated beef leg 1 and the upper part of the end of the prefabricated beam 2 is provided with shear steel 10;
  • Step 22 Providing a temporary pre-embedded round bar at a lower portion of the upper portion of the bovine leg 1 and the end of the prefabricated prefabricated beam 2 prefabricated with the column, and the position of the temporary pre-embedded round bar is consistent with the position of the axial bore 7;
  • Step 23 Set the standing ribs 9 and tie the stirrups 11 to set up the template.
  • Step 3 Inject a small amount of new concrete into the formwork in a horizontal lying manner, and then put the fully wetted concrete block into the interior of the formwork, and then continuously pour new concrete and fully vibrate. New concrete and waste concrete block The mass ratio is 1:1 ⁇ 4:1. After the initial setting of the concrete, the temporary pre-embedded round bar is taken out to form an axial bore 7, and the bovine leg 1 and the end-notched precast beam 2 which are prefabricated with the column are obtained.
  • Step 4 At the construction site, the lifting and erecting of the prefabricated beef leg 1 and the end of the pre-formed beam 2 with the notch are completed, and the externally threaded reinforcing bar 6 is inserted into the axial hole 7 filled with the structural adhesive.
  • the inorganic adhesive material is poured into the gap between the joint portion of the pre-fabricated beef leg 1 and the end-notched precast beam 2, which comprises:
  • Step 41 At the construction site, inject the organic structural adhesive or the inorganic structural adhesive into the upper axial bore 7 of the prefabricated preform 1 and the lower axial bore 7 of the end of the pre-formed beam 2 which are prefabricated with the column, and a sealing paper sheet is attached to the opening of the axial hole 7;
  • Step 42 completing the lifting of the beef leg 1 prefabricated with the column
  • Step 43 lifting the notched prefabricated beam 2 at the end and placing it on the bobbin 1 prefabricated with the column, and at the gap of the connecting area between the two, using a wrench to screw most of the screw
  • the externally threaded reinforcing bar 6 of the internally threaded steel sleeve 5 is gradually unscrewed, so that the externally threaded reinforcing bar 6 penetrates the sealing paper sheet and projects into the axial bore 7;
  • Step 44 Injecting a high-strength micro-expansion type inorganic adhesive material into a space at a joint region between the bobbin 1 which is prefabricated at the same time as the column and the pre-formed beam 2 which is notched at the end.

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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Abstract

一种预制再生块体混凝土梁的连接构造，包括与柱同时预制的牛腿（1）、端部带缺口的预制梁（2）、带孔定位板（4）、架立筋（9）、箍筋（11）、普通纵筋（8）、弯折处理后的纵筋（3）、带内螺纹的钢套筒（5）、带外螺纹的钢筋棒（6）、抗剪型钢（10）、轴向孔道（7）。一种预制再生块体混凝土梁的连接构造的施工方法。该连接构造确保与柱同时预制的牛腿和端部带缺口的预制梁之间连接区域的有效连接，且现场浇筑量小、施工速度快、抗震效果好。

Description

一种预制再生块体混凝土梁的连接构造及其施工方法
技术领域
本发明涉及废旧混凝土循环利用技术领域，具体是一种预制再生块体混凝土梁的连接构造及其施工方法。
背景技术
随着环境问题的日益恶化，废旧混凝土的循环利用已引起国内外广泛关注。与传统的再生粗骨料和再生细骨料相比，采用尺度更大的废旧混凝土块体不仅具有破碎效率高、破碎能耗低等优点，同时还能显著降低后续水泥用量，环保节能效益明显。与此同时，国家正以京津冀、长三角、珠三角城市群和常住人口超过300万的其他城市为重点，大力发展预制装配式建筑。利用废旧混凝土块体再生制造预制混凝土构件成为解决废旧混凝土循环利用问题的一条有效途径。
相邻预制构件之间的连接构造对于预制混凝土结构的整体受力性能具有重要影响。目前，常见做法是提前在工厂分别预制好梁、柱构件，然后在施工现场将二者在节点核心区进行拼接并浇筑该核心区的混凝土。由于穿越节点核心区的梁、柱纵筋和箍筋很多，对该核心区的混凝土浇筑质量可能产生不利影响。与此同时，现场浇筑大量混凝土的湿连接方式对环境影响较大且施工速度相对较慢。因此，迫切需要研发一种拼接部位远离节点核心区且现场浇筑量很小的预制再生块体混凝土构件之间的连接构造及其施工方法。
发明内容
本发明的目的在于提供一种预制再生块体混凝土梁的连接构造及其施工方法，即提前在工厂制作好与柱同时预制的牛腿和端部带缺口的预制梁，然后在施工现场将二者进行有效连接，并在二者之间的空隙处灌注高强微膨胀型无机胶粘材料。
所发明的一种预制再生块体混凝土梁的连接构造及其施工方法，不仅将相邻预制构件之间的拼接部位外移至远离节点核心区的梁端附近，而且现场浇筑量很小，有效解决了节点核心区因钢筋密集可能产生的混凝土浇筑质量问题，同时可明显提高现场施工速度。此外，由于在与柱同时预制的牛腿和端部带缺口的预制梁内采用了弯折处理后的纵筋，使得灌注有有机结构胶或无机结构胶的轴向孔道的混凝土保护层厚度明显增加，可有效减缓火灾高温对结构胶的劣化作用，进而确保与柱同时预制的牛腿和端部带缺口的预制梁之间的连接的有效性，使梁具有良好的耐火性能。进一步地，通过采用弯折处理后的纵筋，使与柱同时预制的牛腿和端部带缺口的预制梁的连接区域的抗弯能力被人为削弱，地震作用下该连接区域将率先屈服形成塑性铰，从而确保 “强柱弱梁”抗震设计思想的实现。
本发明一方面提供了一种预制再生块体混凝土梁的连接构造，包括与柱同时预制的牛腿、端部带缺口的预制梁、带孔定位板、架立筋、箍筋、普通纵筋、弯折处理后的纵筋、带内螺纹的钢套筒、带外螺纹的钢筋棒、抗剪型钢、轴向孔道；
与柱同时预制的牛腿的下部设置有带孔定位板、弯折处理后的纵筋和抗剪型钢；端部带缺口的预制梁的上部设置有带孔定位板、弯折处理后的纵筋和抗剪型钢；所述带孔定位板上预先钻有孔洞，弯折处理后的纵筋的端部加工有外螺纹，每个孔洞对应一根弯折处理后的纵筋，孔洞位置与弯折前的纵筋位置相比更靠近梁的横截面的中心；
弯折处理后的纵筋穿过带孔定位板上预先钻有的孔洞，然后再与带内螺纹的钢套筒的一端进行螺纹连接；带内螺纹的钢套筒的另一端与带外螺纹的钢筋棒进行螺纹连接；
与柱同时预制的牛腿的上部和端部带缺口的预制梁的下部预留有轴向孔道，轴向孔道内灌注有有机结构胶或无机结构胶，每个轴向孔道对应一根带外螺纹的钢筋棒，每根带外螺纹的钢筋棒伸进对应的轴向孔道内；
端部带缺口的预制梁搭放在与柱同时预制的牛腿之上，二者之间连接区域的空隙处灌注有高强微膨胀型无机胶粘材料。
进一步地，与柱同时预制的牛腿和端部带缺口的预制梁的内部填充有新混凝土和废旧混凝土块体。
进一步地，新混凝土为天然骨料混凝土或再生骨料混凝土，所述废旧混凝土块体为旧有建筑物或构筑物去除全部或部分钢筋后破碎而成的块体，废旧混凝土块体的特征尺寸不小于60 mm。
进一步地，轴向孔道的深度不小于15d，带外螺纹的钢筋棒和带内螺纹的钢套筒的长度不小于18d，d为纵筋的直径。
本发明另一方面提供了一种如所述的一种预制再生块体混凝土梁的连接构造的施工方法，包括如下步骤：
步骤1、按照设计要求完成与柱同时预制的牛腿和端部带缺口的预制梁内的弯折处理后的纵筋、带孔定位板、带内螺纹的钢套筒、带外螺纹的钢筋棒和普通纵筋的设置与连接；
步骤2、按照设计要求完成与柱同时预制的牛腿和端部带缺口的预制梁内抗剪型钢、临时预埋圆棒、架立筋和箍筋的设置，架设模板；
步骤3、以横躺方式在模板内部灌入少量新混凝土，然后将充分润湿后的废旧混凝土块体一次性投入模板内部，随后持续浇筑新混凝土并充分振捣；待混凝土初凝后，将临时预埋圆棒取出以形成轴向孔道，得到与柱同时预制的牛腿和端部带缺口的预制梁；
步骤4、在施工现场完成与柱同时预制的牛腿和端部带缺口的预制梁的吊装搭接，使带外螺纹的钢筋棒伸进灌注有结构胶的轴向孔道内，往与柱同时预制的牛腿和端部带缺口的预制梁之间连接区域的空隙处灌注无机胶粘材料。
进一步地，所述步骤1具体包括：
步骤11、在与柱同时预制的牛腿的下部和端部带缺口的预制梁的上部设置端部加工有外螺纹的弯折处理后的纵筋，将弯折处理后的纵筋穿过带孔定位板上预先钻有的孔洞并点焊定位；
步骤12、将带内螺纹的钢套筒的一端与弯折处理后的纵筋的端部进行螺纹连接并点焊定位，带内螺纹的钢套筒的另一端与带外螺纹的钢筋棒进行螺纹连接，并将带外螺纹的钢筋棒的绝大部分旋入带内螺纹的钢套筒内；
步骤13、在与柱同时预制的牛腿的上部和端部带缺口的预制梁的下部设置普通纵筋。
进一步地，所述步骤2具体包括：
步骤21、在与柱同时预制的牛腿的下部和端部带缺口的预制梁的上部设置抗剪型钢；
步骤22、在与柱同时预制的牛腿的上部和端部带缺口的预制梁的下部设置临时预埋圆棒，临时预埋圆棒的安放位置与轴向孔道的位置一致；
步骤23、设置架立筋并绑扎箍筋，架设模板。
进一步地，所述步骤3中新混凝土与废旧混凝土块体的质量比为1:1~4:1。
进一步地，所述步骤4具体包括：
步骤41、在施工现场，往与柱同时预制的牛腿的上部轴向孔道内和端部带缺口的预制梁的下部轴向孔道内灌注有机结构胶或无机结构胶，并在轴向孔道的开口处粘贴封口纸片；
步骤42、完成与柱同时预制的牛腿的吊装就位；
步骤43、吊装端部带缺口的预制梁并将其搭放在与柱同时预制的牛腿之上，并在二者之间连接区域的空隙处，采用扳手将绝大部分已旋入带内螺纹的钢套筒的带外螺纹的钢筋棒逐渐旋出，使带外螺纹的钢筋棒穿破封口纸片并伸进轴向孔道内；
步骤44、在与柱同时预制的牛腿和端部带缺口的预制梁之间连接区域的空隙处灌注高强微膨胀型无机胶粘材料。
本发明相对于现有技术，具有如下优点及效果：
（1）通过将相邻预制构件之间的拼接部位外移至远离节点核心区的梁端附近，同时采用有机结构胶或无机结构胶实现相邻预制构件之间纵筋应力的传递，不仅有效解决了节点核心区因钢筋密集可能产生的混凝土浇筑质量问题，而且由于现场浇筑量很小，使得施工速度明显提高。
（2）通过在与柱同时预制的牛腿和端部带缺口的预制梁中采用弯折处理后的纵筋，使得灌注有有机结构胶或无机结构胶的轴向孔道的混凝土保护层厚度明显增加，可有效减缓火灾高温对结构胶的劣化作用，进而确保与柱同时预制的牛腿和端部带缺口的预制梁之间连接区域的有效连接，使梁具有良好的耐火性能。
（3）通过采用弯折处理后的纵筋，使得与柱同时预制的牛腿和端部带缺口的预制梁的连接区域的抗弯能力被人为削弱，地震作用下该连接区域将率先屈服形成塑性铰，从而确保 “强柱弱梁”抗震设计思想的实现。
附图说明
图1是一种预制再生块体混凝土梁的连接构造的示意图；
图2是弯折处理后的纵筋、带孔定位板、带内螺纹的钢套筒、带外螺纹的钢筋棒的细部示意图；
图中所示为：1-与柱同时预制的牛腿；2-端部带缺口的预制梁；3-弯折处理后的纵筋；4-带孔定位板；5-带内螺纹的钢套筒；6-带外螺纹的钢筋棒（图1所示的带外螺纹的钢筋棒为已旋入状态）；7-轴向孔道；8-普通纵筋；9-架立筋；10-抗剪型钢；11-箍筋。
具体实施方式
下面结合实施例及附图对本发明作进一步详细的描述，但本发明的实施方式不限于此。
如图1所示（为清晰展示连接构造，图中混凝土被隐去），一种预制再生块体混凝土梁的连接构造，包括与柱同时预制的牛腿1、端部带缺口的预制梁2、带孔定位板4、架立筋9、箍筋11、普通纵筋8、弯折处理后的纵筋3、带内螺纹的钢套筒5、带外螺纹的钢筋棒6、抗剪型钢10和轴向孔道7。
与柱同时预制的牛腿1的完整截面的尺寸为350 mm×600mm、端部带缺口的预制梁2的完整截面的尺寸为350 mm×600mm、架立筋9和箍筋11的直径为10mm、弯折处理后的纵筋3和普通纵筋8的直径为20mm。
如图2所示，与柱同时预制的牛腿1的下部和端部带缺口的预制梁2的上部设置有带孔定位板4、三根弯折处理后的纵筋3和抗剪型钢10。带孔定位板4的厚度为25mm，带孔定位板4上预先钻有三个孔洞，弯折处理后的纵筋3的端部加工有外螺纹，每个孔洞对应一根弯折处理后的纵筋3，孔洞位置与弯折前的纵筋位置相比更靠近构梁横截面的中心。三根弯折处理后的纵筋3的位置和与其对应的弯折前的纵筋位置之间在竖直方向上的距离为60mm，外侧两根弯折处理后的纵筋3的位置和与其对应的弯折前的纵筋位置之间在水平方向上的距离为70mm。抗剪型钢10选用型号18工字钢，其长度为360mm。
弯折处理后的纵筋3穿过带孔定位板4上预先钻有的孔洞，然后再与带内螺纹的钢套筒5的一端进行螺纹连接。带内螺纹的钢套筒5的另一端与带外螺纹的钢筋棒6进行螺纹连接。带内螺纹的钢套筒5的内径为20mm，外径为31mm，其长度为360mm，带外螺纹的钢筋棒6的直径为20mm，其长度为360mm。
与柱同时预制的牛腿1的上部和端部带缺口的预制梁2的下部预留有轴向孔道7，轴向孔道7的孔径为25mm，深度为300mm。轴向孔道7内灌注有有机结构胶或无机结构胶，每个轴向孔道7对应一根带外螺纹的钢筋棒6，每根带外螺纹的钢筋棒6伸进对应的轴向孔道7内。
端部带缺口的预制梁2搭放在与柱同时预制的牛腿1之上，二者的搭接长度为250mm，二者之间连接区域的空隙处灌注有高强微膨胀型无机胶粘材料。
如上述一种预制再生块体混凝土梁的连接构造的施工方法，包括如下步骤：
步骤1、按照设计要求完成与柱同时预制的牛腿1和端部带缺口的预制梁2内的弯折处理后的纵筋3、带孔定位板4、带内螺纹的钢套筒5、带外螺纹的钢筋棒6和普通纵筋8的设置与连接，具体包括：
步骤11、在与柱同时预制的牛腿1的下部和端部带缺口的预制梁2的上部设置端部加工有外螺纹的弯折处理后的纵筋3，将弯折处理后的纵筋3穿过带孔定位板4上预先钻有的孔洞并点焊定位；
步骤12、将带内螺纹的钢套筒5的一端与弯折处理后的纵筋3的端部进行螺纹连接并点焊定位，带内螺纹的钢套筒5的另一端与带外螺纹的钢筋棒6进行螺纹连接，并将带外螺纹的钢筋棒6的绝大部分旋入带内螺纹的钢套筒5内；
步骤13、在与柱同时预制的牛腿1的上部和端部带缺口的预制梁2的下部设置普通纵筋8。
步骤2、按照设计要求完成与柱同时预制的牛腿1和端部带缺口的预制梁2内的抗剪型钢10、临时预埋圆棒、架立筋9和箍筋11的设置，架设模板，具体包括：
步骤21、在与柱同时预制的牛腿1的下部和端部带缺口的预制梁2的上部设置抗剪型钢10；
步骤22、在与柱同时预制的牛腿1的上部和端部带缺口的预制梁2的下部设置临时预埋圆棒，临时预埋圆棒的安放位置与轴向孔道7的位置一致；
步骤23、设置架立筋9并绑扎箍筋11，架设模板。
步骤3、以横躺方式在模板内部灌入少量新混凝土，然后将充分润湿后的废旧混凝土块体一次性投入模板内部，随后持续浇筑新混凝土并充分振捣，新混凝土与废旧混凝土块体的质量比为1:1~4:1。待混凝土初凝后，将临时预埋圆棒取出以形成轴向孔道7，得到与柱同时预制的牛腿1和端部带缺口的预制梁2。
步骤4、在施工现场完成与柱同时预制的牛腿1和端部带缺口的预制梁2的吊装搭接，使带外螺纹的钢筋棒6伸进灌注有结构胶的轴向孔道7内，往与柱同时预制的牛腿1和端部带缺口的预制梁2之间连接区域的空隙处灌注无机胶粘材料，具体包括：
步骤41、在施工现场，往与柱同时预制的牛腿1的上部轴向孔道7内和端部带缺口的预制梁2的下部轴向孔道7内灌注有机结构胶或无机结构胶，并在轴向孔道7的开口处粘贴封口纸片；
步骤42、完成与柱同时预制的牛腿1的吊装就位；
步骤43、吊装端部带缺口的预制梁2并将其搭放在与柱同时预制的牛腿1之上，并在二者之间连接区域的空隙处，采用扳手将绝大部分已旋入带内螺纹的钢套筒5的带外螺纹的钢筋棒6逐渐旋出，使带外螺纹的钢筋棒6穿破封口纸片并伸进轴向孔道7内；
步骤44、在与柱同时预制的牛腿1和端部带缺口的预制梁2之间连接区域的空隙处灌注高强微膨胀型无机胶粘材料。
上述实施例的限制，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。

Claims (9)

  1. 一种预制再生块体混凝土梁的连接构造，其特征在于：包括与柱同时预制的牛腿(1)、端部带缺口的预制梁(2)、带孔定位板(4)、架立筋(9)、箍筋(11)、普通纵筋(8)、弯折处理后的纵筋(3)、带内螺纹的钢套筒(5)、带外螺纹的钢筋棒(6)、抗剪型钢(10)、轴向孔道(7)；
    所述与柱同时预制的牛腿(1)的下部设置有带孔定位板(4)、弯折处理后的纵筋(3)和抗剪型钢(10)；所述端部带缺口的预制梁(2)的上部设置有带孔定位板(4)、弯折处理后的纵筋(3)和抗剪型钢(10)；带孔定位板(4)上预先钻有孔洞，弯折处理后的纵筋(3)的端部加工有外螺纹，每个孔洞对应一根弯折处理后的纵筋(3)，孔洞位置与弯折前的纵筋位置相比更靠近梁的横截面的中心；
    弯折处理后的纵筋(3)穿过带孔定位板(4)上预先钻有的孔洞，然后再与带内螺纹的钢套筒(5)的一端进行螺纹连接；带内螺纹的钢套筒(5)的另一端与带外螺纹的钢筋棒(6)进行螺纹连接；
    所述与柱同时预制的牛腿(1)的上部和端部带缺口的预制梁(2)的下部预留有轴向孔道(7)，轴向孔道(7)内灌注有有机结构胶或无机结构胶，每个轴向孔道(7)对应一根带外螺纹的钢筋棒(6)，每根带外螺纹的钢筋棒(6)伸进对应的轴向孔道(7)内；
    所述端部带缺口的预制梁(2)搭放在与柱同时预制的牛腿(1)之上，二者之间连接区域的空隙处灌注有高强微膨胀型无机胶粘材料。
  2. 根据权利要求1所述的一种预制再生块体混凝土梁的连接构造，其特征在于：所述与柱同时预制的牛腿(1)和端部带缺口的预制梁(2)的内部填充有新混凝土和废旧混凝土块体。
  3. 根据权利要求2所述的一种预制再生块体混凝土梁的连接构造，其特征在于：所述新混凝土为天然骨料混凝土或再生骨料混凝土，所述废旧混凝土块体为旧有建筑物或构筑物去除全部或部分钢筋后破碎而成的块体，所述废旧混凝土块体的特征尺寸不小于60mm。
  4. 根据权利要求1所述的一种预制再生块体混凝土梁的连接构造，其特征在于：所述轴向孔道(7)的深度不小于15d，所述带外螺纹的钢筋棒(6)和带内螺纹的钢套筒(5)的长度不小于18d，d为纵筋的直径。
  5. 一种如权利要求1至4中任一项所述的一种预制再生块体混凝土梁的连接构造的施工方法，其特征在于，包括如下步骤：
    步骤1、按照设计要求完成与柱同时预制的牛腿(1)和端部带缺口的预制梁(2)内的弯折处理后的纵筋(3)、带孔定位板(4)、带内螺纹的钢套筒(5)、带外螺纹的钢筋棒(6)和普通纵筋(8)的设置与连接；
    步骤2、按照设计要求完成与柱同时预制的牛腿(1)和端部带缺口的预制梁(2)内的抗剪型钢(10)、临时预埋圆棒、架立筋(9)和箍筋(11)的设置，架设模板；
    步骤3、以横躺方式在模板内部灌入少量新混凝土，然后将充分润湿后的废旧混凝土块体一次性投入模板内部，随后持续浇筑新混凝土并充分振捣；待混凝土初凝后，将临时预埋圆棒取出以形成轴向孔道(7)，得到与柱同时预制的牛腿(1)和端部带缺口的预制梁(2)；
    步骤4、在施工现场完成吊装搭接，使带外螺纹的钢筋棒(6)伸进灌注有结构胶的轴向孔道(7)内，往与柱同时预制的牛腿(1)和端部带缺口的预制梁(2)之间连接区域的空隙处灌注无机胶粘材料。
  6. 根据权利要求5所述的施工方法，其特征在于：所述步骤1具体包括：
    步骤11、在与柱同时预制的牛腿(1)的下部和端部带缺口的预制梁(2)的上部设置端部加工有外螺纹的弯折处理后的纵筋(3)，将弯折处理后的纵筋(3)穿过带孔定位板(4)上预先钻有的孔洞并点焊定位；
    步骤12、将带内螺纹的钢套筒(5)的一端与弯折处理后的纵筋(3)的端部进行螺纹连接并点焊定位，带内螺纹的钢套筒(5)的另一端与带外螺纹的钢筋棒(6)进行螺纹连接，并将带外螺纹的钢筋棒(6)的绝大部分旋入带内螺纹的钢套筒(5)内；
    步骤13、在与柱同时预制的牛腿(1)的上部和端部带缺口的预制梁(2)的下部设置普通纵筋(8)。
  7. 据权利要求5所述的施工方法，其特征在于：所述步骤2具体包括：
    步骤21、在与柱同时预制的牛腿(1)的下部和端部带缺口的预制梁(2)的上部设置抗剪型钢(10)；
    步骤22、在与柱同时预制的牛腿(1)的上部和端部带缺口的预制梁(2)的下部设置临时预埋圆棒，临时预埋圆棒的安放位置与轴向孔道(7)的位置一致；
    步骤23、设置架立筋(9)并绑扎箍筋(11)，架设模板。
  8. 根据权利要求5所述的施工方法，其特征在于：所述步骤3中，所述新混凝土与废旧混凝土块体的质量比为1:1~4:1。
  9. 根据权利要求5所述的施工方法，其特征在于：所述步骤4具体包括：
    步骤41、在施工现场，往与柱同时预制的牛腿(1)的上部轴向孔道(7)内和端部带缺口的预制梁(2)的下部轴向孔道(7)内灌注有机结构胶或无机结构胶，并在轴向孔道(7)的开口处粘贴封口纸片；
    步骤42、完成与柱同时预制的牛腿(1)的吊装就位；
    步骤43、吊装端部带缺口的预制梁(2)并将其搭放在与柱同时预制的牛腿(1)之上，并在二者之间连接区域的空隙处，利用扳手将绝大部分已旋入带内螺纹的钢套筒(5)的带外螺纹的钢筋棒(6)逐渐旋出，使带外螺纹的钢筋棒(6)穿破封口纸片并伸进轴向孔道(7)内；
    步骤44、在与柱同时预制的牛腿(1)和端部带缺口的预制梁(2)之间连接区域的空隙处灌注高强微膨胀型无机胶粘材料。
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