黄晨

摘要：装配式混凝土建筑施工时，在转换层处会涉及现浇墙体与预制墙板的连接，连接的有效性和连接质量取決于现浇墙体内预留竖向插筋定位的精度。由于在浇筑墙体及叠合板现浇层时墙体内预留竖向插筋易被扰动，造成偏位，影响预制墙板安装效率和安装质量，难以保证转换层连接处的强度等性能要求。为解决上述问题，基于自主创新的预留钢筋定位系统，结合工程实例详细介绍了转换层墙体预留钢筋定位技术。施工结果表明保证了预留钢筋与预制墙板的可靠连接，实现了预制墙板的快速安装;有效提高了施工效率，节约了成本。

Abstract： During the construction of prefabricated concrete building， the connection between transfer layer and prefabricated wall panel will be involved in the transfer floor. The effectiveness and quality of the connection depend on the accuracy of the positioning of the reserved vertical joint bars in the transfer layer. Due to the disturbance of the reserved vertical joint bars in the wall body during the pouring of the wall and the cast-in-place layer of the laminated plate， the installation efficiency and quality of the prefabricated wall panel are affected， and it is difficult to ensure the strength of the joint of the transfer layer and other performance requirements. In order to solve the problem， the reserved joint bar positioning technology of the transfer layer is introduced in detail based on the independent innovation of the reserved joint bar positioning system and the engineering example. The construction results show that the reliable connection between the reserved joint bar and the prefabricated wall panel is ensured， the rapid installation of the prefabricated wall panel is realized， the construction efficiency is effectively improved， and the cost is saved.

关键词：装配式;转换层;预制墙板;定位

Key words： prefabricated;transfer layer;prefabricated wall panel;positioning

中图分类号：TU755.3                                  文献标识码：A                                  文章编号：1006-4311（2020）23-0123-02

0  引言

装配式混凝土剪力墙结构转换层墙体施工过程中，浇筑墙体混凝土时造成竖向插筋出现偏位及预留长度难以准确控制，导致在预制墙板构件安装时预留钢筋难以插入预制墙板底部的灌浆套筒内，进而无法保证转换层连接处的施工质量。当预留竖向插筋偏位较大时可能发生其无法与预制墙板定位孔位置进行对应的问题，导致后续的预制墙板施工难以进行，如果进行返工施工过程也极为复杂，增加施工成本，浪费资源。本文以实际工程为例，通过采用预留插筋定位技术解决了竖向插筋常出现偏位等问题，保证了连接部位的施工质量。

1  工程概况

某装配式住宅用地项目，总建筑面积约15万m2，其中1#至8#住宅楼均为装配式剪力墙结构，最大预制率40.1%，建筑最高为18层。……