CN108331262A - A kind of steel concrete supporting structure and its installation method - Google Patents
A kind of steel concrete supporting structure and its installation method Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 96
- 239000010959 steel Substances 0.000 title claims abstract description 96
- 239000004567 concrete Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009434 installation Methods 0.000 title claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- 239000011150 reinforced concrete Substances 0.000 abstract description 8
- 238000010276 construction Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000011440 grout Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
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Abstract
Description
技术领域technical field
本发明属于钢筋机械连接技术领域，尤其涉及一种钢筋机械连接结构及其安装方法。The invention belongs to the technical field of steel bar mechanical connection, and in particular relates to a steel bar mechanical connection structure and an installation method thereof.
背景技术Background technique
钢筋机械连接是一项新型钢筋连接工艺，被称为继绑扎、电焊之后的“第三代钢筋接头”，具有接头强度高于钢筋母材、速度比电焊快、无污染、节省钢材等优点。目前常见的钢筋机械连接方法有三种：(1)套筒挤压连接接头，通过挤压力使连接钢筋与套筒发生塑性变形而紧密咬合，但挤压设备比较笨重，现场施工不便；(2)锥螺纹连接接头，通过钢筋端头和连接件端头的锥形螺纹咬合而形成连接接头，锥螺纹丝头工厂预制，现场施工仅需扭矩扳手即可，操作方便，但锥螺纹连接接头质量不够稳定，一般用于接头质量等级要求不高的情况；(3)直螺纹连接接头，是钢筋等强连接的国际最新潮流，接头质量稳定可靠，连接强度高，施工方便快捷，其既有锥螺纹接头施工方便的优点，又克服了连接质量不稳定的缺点，因此直螺纹连接技术的出现给钢筋连接技术带来了质的飞跃。The mechanical connection of steel bars is a new type of steel bar connection technology, known as the "third-generation steel bar joint" after binding and electric welding. At present, there are three common mechanical connection methods for steel bars: (1) Sleeve extrusion joints, through the extrusion force, the connecting steel bars and sleeves are plastically deformed and tightly occluded, but the extrusion equipment is relatively heavy and the on-site construction is inconvenient; (2) ) taper thread connection joint, the connection joint is formed by the conical thread occlusal of the end of the steel bar and the end of the connector. It is not stable enough, and is generally used when the quality level of the joint is not high; (3) The straight thread joint is the latest international trend of strong connection such as steel bars. The quality of the joint is stable and reliable, the connection strength is high, and the construction is convenient and fast. The advantages of convenient construction of threaded joints have overcome the shortcomings of unstable connection quality, so the emergence of straight threaded connection technology has brought a qualitative leap in steel bar connection technology.
普通的单套筒直螺纹连接或锥螺纹连接需要对接钢筋能够自由转动，通过扭转钢筋保证在套筒中央位置相互顶紧，既能提高连接质量又能减少接头的残余变形。但对于预制混凝土构件和钢筋绑扎骨架，因钢筋位置随预制混凝土或钢筋绑扎骨架位置而固定，单根钢筋无法做到自由转动。实际施工时通常在一段连接钢筋上加长丝头，事先把连接套筒旋入加长丝头，待钢筋对位后，把连接套筒由加长丝头旋入另一根钢筋中，此种方法的弊端是，连接套筒在连接钢筋之间平滑旋转，无法施加扭矩使钢筋顶紧，此连接的残余变形非常大，接头质量很难保证。Ordinary single-sleeve straight thread connection or taper thread connection requires the butt steel bars to be able to rotate freely. By twisting the steel bars to ensure mutual tightness at the center of the sleeve, it can not only improve the connection quality but also reduce the residual deformation of the joint. But for prefabricated concrete components and steel bar binding skeleton, because the position of steel bar is fixed with the position of precast concrete or steel bar binding skeleton, single steel bar can't be achieved free rotation. In actual construction, a long wire head is usually added to a connecting steel bar, and the connecting sleeve is screwed into the long wire head in advance. After the steel bar is aligned, the connecting sleeve is screwed from the long wire head into another steel bar. The disadvantage is that the connecting sleeve rotates smoothly between the connecting steel bars, and the torque cannot be applied to tighten the steel bars. The residual deformation of this connection is very large, and the quality of the joint is difficult to guarantee.
建筑工业化是当前我国建筑业的发展趋势，是实现“四节一环保”绿色建筑的重要步骤。建筑工业化的重要特征就是，大部分构件在工厂预制，现场仅仅做简单的连接构造就能满足结构受力要求，预制构件的钢筋连接必须在现场完成，预制构件钢筋的现场连接常见的方法有：钢筋套筒灌浆连接和钢筋浆锚搭接连接。钢筋套筒灌浆连接接头的工作机理是给予灌浆套筒内灌浆料有较高的抗压强度，同时灌浆料具有微膨胀性，当浆料遇到套筒的约束时，在浆料与套筒内壁产生较大的压力，并由此压力产生摩擦力以传递钢筋的轴向应力，套管灌浆连接对连接套筒和钢筋的位置准确度要求很高，且要求灌浆料具有流动性和微膨胀性，施工难度很大，是建筑工业化快速发展的瓶颈。钢筋浆锚搭接连接与钢筋套筒灌浆连接类似，在混凝土中预埋波纹管，待混凝土强度达到要求后，钢筋穿过波纹管，再将高强度微膨胀灌浆料灌入波纹管养护，利用波纹管约束混凝土产生的挤压力传递钢筋的轴力。同样钢筋浆锚搭接连接也有施工难度大、灌浆料质量难控制等特点。The industrialization of construction is the development trend of my country's construction industry at present, and it is an important step to realize the "four festivals and one environmental protection" green building. The important feature of building industrialization is that most of the components are prefabricated in the factory, and only a simple connection structure on site can meet the structural force requirements. The reinforcement connection of prefabricated components must be completed on site. The common methods for on-site connection of prefabricated component reinforcement are: Reinforcement sleeve grouting connection and reinforcement grout anchor lap connection. The working mechanism of the steel sleeve grouting connection joint is to give the grouting material in the grouting sleeve a high compressive strength, and at the same time, the grouting material has micro-expansion. The inner wall generates a large pressure, and the pressure generates friction to transmit the axial stress of the steel bar. The casing grouting connection has high requirements for the position accuracy of the connecting sleeve and the steel bar, and the grouting material is required to have fluidity and micro-expansion nature, the construction is very difficult, and it is the bottleneck of the rapid development of construction industrialization. The steel grout anchor lap connection is similar to the steel sleeve grouting connection. The bellows are pre-embedded in the concrete. After the concrete strength meets the requirements, the steel bars pass through the bellows, and then the high-strength micro-expansion grouting material is poured into the bellows for maintenance. The extrusion force generated by the concrete confined by the bellows transmits the axial force of the steel bar. Similarly, the steel grout anchor lap connection also has the characteristics of difficult construction and difficult control of the quality of grouting materials.
发明内容Contents of the invention
针对上述不足，本发明提供一种钢筋机械连接结构及其安装方法，解决预制构件在现场的钢筋连接这一目前建筑工业化发展的瓶颈，利用本发明的方法进行钢筋连接，不仅能实现钢筋的等强连接，还能对被连接构件施加预应力，提高预制构件连接节点的抗震性能。In view of the above deficiencies, the present invention provides a steel bar mechanical connection structure and its installation method, which solves the bottleneck of the current construction industrialization development of prefabricated components on site. Strong connection can also apply prestress to the connected components and improve the seismic performance of the connection nodes of prefabricated components.
本发明所采用的技术方案如下：一种钢筋机械连接结构，包括第一连接套筒、第二连接套筒和连接螺杆，所述第一连接套筒和第二连接套筒内有内螺纹，两个内螺纹的旋向相反，所述连接螺杆由两端的螺纹段和中部的连接段三部分组成，螺纹段具有外螺纹，两个外螺纹的旋向相反，第一连接套筒旋接于连接螺杆的一端，第二连接套筒旋接于连接螺杆的另一端。The technical scheme adopted in the present invention is as follows: a steel bar mechanical connection structure, including a first connecting sleeve, a second connecting sleeve and a connecting screw rod, the first connecting sleeve and the second connecting sleeve have internal threads, The direction of rotation of the two internal threads is opposite. The connecting screw is composed of three parts: threaded sections at both ends and a connecting section in the middle. The threaded section has external threads, and the directions of rotation of the two external threads are opposite. The first connecting sleeve is screwed on the One end of the connecting screw rod is connected, and the second connecting sleeve is screwed on the other end of the connecting screw rod.
进一步的，所述第一连接套筒和第二连接套筒长度相同，第一连接套筒和第二连接套筒均比普通连接套筒要长，其长度通过计算确定，具体由下式计算：Further, the length of the first connecting sleeve and the second connecting sleeve is the same, and both the first connecting sleeve and the second connecting sleeve are longer than the common connecting sleeve, and the length is determined by calculation, specifically calculated by the following formula :
lt＝b+δl t = b +δ
式中lt为第一连接套筒或第二连接套筒的长度，lb为普通钢筋连接套筒的长度，δ为考虑到预制构件或钢筋骨架位置不准确而产生的误差。In the formula, lt is the length of the first connecting sleeve or the second connecting sleeve, lb is the length of the ordinary steel connecting sleeve, and δ is the error caused by considering the inaccurate position of the prefabricated component or steel skeleton.
进一步的，所述连接螺杆的长度由计算确定，其螺纹段的长度与第一连接套筒或第二连接套筒的长度相同，Further, the length of the connecting screw is determined by calculation, and the length of its threaded section is the same as the length of the first connecting sleeve or the second connecting sleeve,
连接螺杆的长度由下式计算：The length of the connecting screw is calculated by the following formula:
式中lg为连接螺杆的长度，为连接螺杆中部连接段的长度。where l g is the length of the connecting screw, is the length of the connecting section in the middle of the connecting screw.
进一步的，所述连接套筒外形为圆形或采用六角头构造。Further, the connecting sleeve is circular or adopts a hexagonal structure.
进一步的，所述连接螺杆中部外形为普通钢筋外形或采用六角头构造。Further, the shape of the middle part of the connecting screw is the shape of a common steel bar or a hexagonal head structure.
进一步的，所述第一连接套筒和第二连接套筒分别与连接螺杆的连接均为直螺纹连接或锥螺纹连接。Further, the connection between the first connecting sleeve and the second connecting sleeve and the connecting screw is either a straight thread connection or a tapered thread connection.
本发明还提供一种钢筋机械连接结构的安装方法，具体包括如下步骤：The present invention also provides a method for installing a steel bar mechanical connection structure, which specifically includes the following steps:
(1)完成第一待连接钢筋和第二待连接钢筋的就位，把第一连接套筒旋接于连接螺杆的一端，第二连接套筒旋接于连接螺杆的另一端；(1) Complete the placement of the first steel bar to be connected and the second steel bar to be connected, screw the first connecting sleeve to one end of the connecting screw, and screw the second connecting sleeve to the other end of the connecting screw;
(2)把第一连接套筒从连接螺杆上旋入第一待连接钢筋上，把第二连接套筒从连接螺杆上旋入第二待连接钢筋上，并对第一连接套筒和第二连接套筒施加扭矩；(2) Screw the first connecting sleeve from the connecting screw into the first steel bar to be connected, screw the second connecting sleeve from the connecting screw into the second steel bar to be connected, and align the first connecting sleeve and the second Two connecting sleeves apply torque;
(3)固定第一连接套筒和第二连接套筒，对连接螺杆施加反向扭矩；(3) fixing the first connecting sleeve and the second connecting sleeve, and applying reverse torque to the connecting screw;
(4)测量扭矩的大小和连接的变形量，满足要求后即可完成钢筋连接。(4) Measure the size of the torque and the deformation of the connection, and the steel bar connection can be completed after meeting the requirements.
本发明的有益效果如下：本发明提供的一种钢筋机械连接结构与两端被连接钢筋完成对位旋入连接后，对连接螺杆施加扭矩，可以减少钢筋连接的残余变形，保证连接质量。本发明可以用于两端连接钢筋均无法转动的情况，主要用于预制钢筋混凝土构件及整体钢筋绑扎骨架之间的钢筋连接，也可用于普通钢筋的连接。The beneficial effects of the present invention are as follows: After the mechanical connection structure of steel bars provided by the present invention is counter-rotated to the connected steel bars at both ends, torque is applied to the connecting screw, which can reduce the residual deformation of the steel bar connection and ensure the connection quality. The invention can be used in the situation that the steel bars connected at both ends cannot be rotated. It is mainly used for the steel bar connection between prefabricated reinforced concrete members and the integral steel bar binding framework, and can also be used for the connection of common steel bars.
附图说明Description of drawings
图1是本发明钢筋机械连接结构装配爆炸图；Fig. 1 is the assembling explosion diagram of steel bar mechanical connection structure of the present invention;
图2-5是本发明实施例1单根钢筋的连接状态图；Fig. 2-5 is the connection status figure of single steel bar of embodiment 1 of the present invention;
图6-11是本发明实施例2预制钢筋混凝土柱钢筋的连接状态图；Fig. 6-11 is the connection state diagram of prefabricated reinforced concrete column steel bar of embodiment 2 of the present invention;
图中，连接螺杆1、第一连接套筒2、第二连接套筒3、第一待连接钢筋4、第二待连接钢筋5。In the figure, a connecting screw 1, a first connecting sleeve 2, a second connecting sleeve 3, a first reinforcing bar 4 to be connected, and a second reinforcing bar 5 to be connected.
具体实施方法Specific implementation method
为了使本发明的技术方案和优点更加清楚，下面结合具体的应用对发明实施方式做进一步的阐述。In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with specific applications.
如图1所示，本发明提供的一种钢筋机械连接结构，包括连接螺杆1、第一连接套筒2和第二连接套筒3，所述第一连接套筒2和第二连接套筒3内有内螺纹，两个内螺纹的旋向相反，所述连接螺杆1由两端的螺纹段和中部的连接段三部分组成，螺纹段具有外螺纹，两个外螺纹的旋向相反，第一连接套筒2旋接于连接螺杆1的一端，第二连接套筒3旋接于连接螺杆1的另一端。As shown in Figure 1, a steel bar mechanical connection structure provided by the present invention includes a connecting screw 1, a first connecting sleeve 2 and a second connecting sleeve 3, and the first connecting sleeve 2 and the second connecting sleeve 3. There are internal threads inside, and the direction of rotation of the two internal threads is opposite. The connecting screw 1 is composed of three parts: threaded sections at both ends and a connecting section in the middle. The threaded section has external threads, and the direction of rotation of the two external threads is opposite. A connecting sleeve 2 is screwed on one end of the connecting screw 1 , and a second connecting sleeve 3 is screwed on the other end of the connecting screw 1 .
所述第一连接套筒2和第二连接套筒3长度相同，第一连接套筒2和第二连接套筒3均比普通连接套筒要长，其长度通过计算确定，具体由下式计算：The first connecting sleeve 2 and the second connecting sleeve 3 have the same length, and the first connecting sleeve 2 and the second connecting sleeve 3 are longer than ordinary connecting sleeves, and their lengths are determined by calculation, specifically by the following formula calculate:
lt＝b+δl t = b +δ
式中lt为第一连接套筒2或第二连接套筒3的长度，lb为普通钢筋连接套筒的长度，δ为考虑到预制构件或钢筋骨架位置不准确而产生的误差，与施工制作水平和施工管理水平有关。连接套筒的加工制作要求与普通钢筋连接套筒一致，满足现行的规范标准，利用现有的设备即可加工制作。连接套筒上要施加扭矩，现行普通的连接套筒均为圆形，施加扭矩需采用专门的扭矩扳手，扭矩扳手比较笨重，施工操作不方便。如连接套筒外形采用六角头，就可以使用普通扳手施加扭矩。In the formula, l t is the length of the first connecting sleeve 2 or the second connecting sleeve 3, l b is the length of the common steel bar connecting sleeve, δ is the error caused by considering the inaccurate position of the prefabricated component or steel bar skeleton, and The level of construction production is related to the level of construction management. The processing and production requirements of the connecting sleeve are consistent with those of ordinary steel bar connecting sleeves, meet the current norms and standards, and can be processed and manufactured by using existing equipment. Torque needs to be applied to the connecting sleeve. The current common connecting sleeves are all circular, and a special torque wrench is required to apply the torque. The torque wrench is cumbersome and inconvenient for construction and operation. If the shape of the connecting sleeve is a hexagonal head, a normal wrench can be used to apply the torque.
连接螺杆的材质可与连接钢筋母材一致，也可与连接套筒的母材一致，只要能满足钢筋连接的各项要求即可。如与连接钢筋母材一致，其中部连接段可保留钢筋外形用于施加扭矩；如与连接套筒母材一致，其中部外形可采用六角头构造以方便施加反向扭矩。无论采用何种材质，均可以利用现有的设备加工制作连接螺杆，成本低廉、技术可靠、质量可控。所述连接螺杆1的长度由计算确定，其螺纹段的长度与第一连接套筒2或第二连接套筒3的长度相同，The material of the connecting screw can be the same as the base material of the connecting steel bar, or the same as the base material of the connecting sleeve, as long as it can meet the requirements of the connecting steel bar. If it is consistent with the base material of the connecting steel bar, the middle connecting section can retain the shape of the steel bar for applying torque; if it is consistent with the base material of the connecting sleeve, the middle shape can adopt a hexagonal head structure to facilitate the application of reverse torque. No matter what material is used, existing equipment can be used to process and manufacture the connecting screw, which has low cost, reliable technology and controllable quality. The length of the connecting screw 1 is determined by calculation, and the length of its threaded section is the same as the length of the first connecting sleeve 2 or the second connecting sleeve 3,
连接螺杆的长度由下式计算：The length of the connecting screw is calculated by the following formula:
式中lg为连接螺杆的长度，为连接螺杆中部连接段的长度，其长度需满足施加反向扭矩的施工操作长度要求。where l g is the length of the connecting screw, To connect the length of the connecting section in the middle of the screw, the length needs to meet the length requirements of the construction operation for applying reverse torque.
进一步的，所述第一连接套筒2和第二连接套筒3分别与连接螺杆的连接均为直螺纹连接或锥螺纹连接，需满足钢筋连接的所有要求。Further, the connections between the first connecting sleeve 2 and the second connecting sleeve 3 and the connecting screw rods are either straight thread connections or taper thread connections, which need to meet all requirements for steel bar connections.
本发明还提供一种钢筋机械连接结构的安装方法，具体包括如下步骤：The present invention also provides a method for installing a steel bar mechanical connection structure, which specifically includes the following steps:
(1)完成第一待连接钢筋4和第二待连接钢筋5的就位，把第一连接套筒2旋接与连接螺杆1的一端，第二连接套筒3旋接与连接螺杆1的另一端；(1) Complete the placement of the first steel bar 4 to be connected and the second steel bar 5 to be connected, the first connecting sleeve 2 is screwed to one end of the connecting screw 1, and the second connecting sleeve 3 is screwed to the end of the connecting screw 1 another side;
(2)把第一连接套筒2从连接螺杆1上旋入第一待连接钢筋4上，把第二连接套筒3从连接螺杆1上旋入第二待连接钢筋5上，并对第一连接套筒2和第二连接套筒3施加扭矩；(2) Screw the first connecting sleeve 2 from the connecting screw 1 into the first reinforcing bar 4 to be connected, screw the second connecting sleeve 3 from the connecting screw 1 into the second reinforcing bar 5 to be connected, and A connecting sleeve 2 and a second connecting sleeve 3 apply torque;
(3)固定第一连接套筒2和第二连接套筒3，对连接螺杆1施加反向扭矩；(3) fix the first connecting sleeve 2 and the second connecting sleeve 3, and apply reverse torque to the connecting screw 1;
(4)测量扭矩的大小和连接的变形量，满足要求后即可完成钢筋连接。(4) Measure the size of the torque and the deformation of the connection, and the steel bar connection can be completed after meeting the requirements.
实施例1：单根钢筋的连接Example 1: Connection of a single steel bar
步骤a、根据连接钢筋的直径、种类采用配套的连接套筒和连接螺杆，连接套筒和连接螺杆需满足连接节点的各项性能要求，首先把两个连接套筒旋入连接螺杆上，如图2所示；Step a, according to the diameter and type of the connecting steel bar, use the matching connecting sleeve and connecting screw rod. The connecting sleeve and connecting screw rod must meet the performance requirements of the connecting node. First, screw the two connecting sleeves into the connecting screw rod, such as As shown in Figure 2;
步骤b、预制构件或钢筋骨架在绑扎钢筋之前，对需要待连接的第一待连接钢筋4和第二待连接钢筋5的端头加工制作螺纹丝头，丝头深度及长度需满足钢筋连接的相应要求，如图2所示；Step b, before the prefabricated component or the steel bar skeleton is bound to the steel bars, process the ends of the first steel bar 4 to be connected and the second steel bar 5 to be connected to make threaded threads, and the depth and length of the threaded heads must meet the requirements of the steel bar connection Corresponding requirements, as shown in Figure 2;
步骤c、预制构件或钢筋骨架的现场定位和固定，如图2所示，以确保连接件能准确旋入且接头处空隙需满足要求，当被连接钢筋的位置或对准度不能满足要求时，需对连接钢筋处理后才可连接。Step c. On-site positioning and fixing of prefabricated components or steel skeletons, as shown in Figure 2, to ensure that the connectors can be screwed in accurately and the gap at the joints must meet the requirements. When the position or alignment of the connected steel bars cannot meet the requirements , need to deal with the connecting reinforcement before connecting.
步骤d、把两端的连接套筒从连接螺杆上旋入待连接钢筋的两端上，并对连接套筒施加扭矩，如图3和4所示。Step d, screw the connecting sleeves at both ends from the connecting screw rods into the two ends of the steel bars to be connected, and apply torque to the connecting sleeves, as shown in Figures 3 and 4.
步骤e、固定连接套筒，对连接螺杆施加反向扭矩，如图5所示，施加的扭矩会产生轴向拉力，此轴力可以减少钢筋连接的残余变形，此扭矩值可作为衡量钢筋连接接头质量的指标之一。Step e, fix the connecting sleeve, apply a reverse torque to the connecting screw, as shown in Figure 5, the applied torque will generate an axial tension, this axial force can reduce the residual deformation of the steel connection, this torque value can be used as a measure of the steel connection One of the indicators of joint quality.
实施例2：预制钢筋混凝土柱钢筋的连接Example 2: Connection of steel bars in prefabricated reinforced concrete columns
步骤a、预制钢筋混凝土下柱运至现场吊装就位后，柱上端露出待连接钢筋，如图6所示，待连接钢筋上有连接螺纹(图中未示意)。Step a. After the prefabricated reinforced concrete lower column is transported to the site and hoisted in place, the upper end of the column exposes the steel bars to be connected, as shown in Figure 6, and there are connecting threads on the steel bars to be connected (not shown in the figure).
步骤b、预制钢筋混凝土上柱运至现场吊装就位后，柱下端也有待连接钢筋，如图7所示，待连接钢筋需对位准确Step b. After the upper column of prefabricated reinforced concrete is transported to the site and hoisted in place, the lower end of the column also needs to be connected with steel bars, as shown in Figure 7, and the alignment of the steel bars to be connected must be accurate
步骤c、每根待连接钢筋均需像实施例1一样安装本发明的连接结构，预先把连接套筒旋入连接螺杆上，如图8所示Step c, each steel bar to be connected needs to be installed with the connection structure of the present invention as in embodiment 1, and the connection sleeve is screwed into the connection screw rod in advance, as shown in Figure 8
步骤d、把每个连接结构的下连接套筒旋入下端待连接钢筋，并施加扭矩，如图9所示，上连接套筒旋入上端待连接钢筋，也施加扭矩，套筒旋入钢筋的长度需满足钢筋连接的相应要求，如图10所示。Step d, screw the lower connection sleeve of each connection structure into the steel bar to be connected at the lower end, and apply torque, as shown in Figure 9, screw the upper connection sleeve into the steel bar to be connected at the upper end, and apply torque, and the sleeve is screwed into the steel bar The length must meet the corresponding requirements for steel bar connection, as shown in Figure 10.
步骤e、依次固定每个连接结构的两端套筒，并对连接螺杆实施反向扭矩，并记录扭矩值，当扭矩值均满足要求时，即完成了预制钢筋混凝土柱的钢筋连接。Step e, fixing the sleeves at both ends of each connecting structure in turn, applying reverse torque to the connecting screw rod, and recording the torque value, when the torque value meets the requirements, the reinforcement connection of the prefabricated reinforced concrete column is completed.
步骤f、绑扎柱纵向钢筋连接区的箍筋，如图11所示。Step f, tying the stirrups in the connection area of the longitudinal reinforcement of the column, as shown in Figure 11.
步骤g、浇筑连接区的混凝土，待混凝土强度满足要求时，即完成了预制钢筋混凝土柱的连接。Step g, pouring concrete in the connection area, and when the strength of the concrete meets the requirements, the connection of the prefabricated reinforced concrete columns is completed.
以上仅描述了本发明的基本原理和优选实施方式，本领域人员可以根据上述描述做出许多变化和改进，这些变化和改进应该属于本发明的保护范围。The above only describes the basic principle and preferred implementation of the present invention, and those skilled in the art can make many changes and improvements according to the above description, and these changes and improvements should belong to the protection scope of the present invention.
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