## 1 Introduction  
In recent years, construction industrialization has emerged as a development trend within the construction industry. Prefabricated structures offer numerous advantages over conventional reinforced concrete structures, such as increased production and construction efficiency, reduced environmental impact, cost savings, and higher resource utilization rates [1]. However, certain drawbacks exist, including limited structural integrity and complex design challenges, which somewhat restrict their practical application [2, 3]. Damage and failure in prefabricated structures predominantly occur not in the precast components but in the connection joints between key components. These joints, often termed the \"weakest links\", significantly affect the overall performance of the structure [4]. Specifically, the quality of vertical grout anchor steel bar connections has a crucial impact on the overall seismic performance of prefabricated shear walls [5, 6, 7]. Therefore, selecting the appropriate connection type and ensuring the performance of joints and connection nodes between components constitute key research and development areas in prefabricated shear wall structures. Sustainable development in the prefabricated construction industry can be advanced via continuous innovation and improved connection technologies.  
Existing vertical connection methods for prefabricated shear wall structures primarily include wet and dry connections. Wet connections mainly consist of grouted sleeve connections and restrained grout anchor lap joints [8, 9]. Technologies within the restrained grout anchor lap connections include those restrained by spiral stirrups and those designed for prefabricated perforated metal corrugated pipes [10]. The working principles of restrained grout anchor lap connections and grouted sleeve connections are similar; both transmit force via the bond between the grouting material and the steel bar to achieve joint connection. Even when the bond between the steel bar and the grouting material is compromised, the connection can maintain force transmission via interlocking forces [11; 12]. The steel bars' lap length is critical in studying the structural performance of grout anchor lap joint connections.  
Given the existing technology in grout anchor lap connections, numerous scholars have sought to enhance its efficacy. [PERSON] et al. [13] introduced plug-in preformed hole grout steel bar lap connection technology in 2009. Subsequently, [PERSON] et al. [14] conducted a study which included a series of anchorage performance experiments and lap performance experiments employing the grout anchor lap method. [PERSON] et al. [15] discuss the seismic performance of nine full-scale shear walls, including seven precast specimens and two cast-in-place specimens, and proved that shear walls with metal bellows at the joint have good structural properties. [PERSON] et al. [16] performed incremental tensile load tests on 16 grouted sleeve lap connectors and 3 grouted splice connectors, and it was found that the tensile capacities of the grouted sleeve lapping connectors were up to 2.45 times that of the grouted splice connectors when the sleeve inner surfaces were smooth. All of the grouted sleeve lapping connectors failed via a bar tensile fracture or bar-grout.  
On the basis of previous studies, this study introduces a new type of corrugated pipe grout anchor connection technique, as illustrated in Figure 1. Two groups of 17 specimens were made, and the pull-out test on the new type of slurry anchor connection was carried out. The performance of the new type of corrugated pipe grout anchor connection is studied.