日本建设省关东技术事务所、日本建设机械化研究所和川村工业株式会社在1997年共同开发了抓、卸固堤混凝土块的机具——固堤混凝土块抓取专用夹钳(以下简称夹钳),解决了在江河泛滥堤坝决口时,混凝土块的装卸问题。夹钳分抓取2 t 混凝土块的2 t 型和可抓取2 t、4 t 混凝土块的兼用型(图1)。两种型号的夹钳结构相似(参数见表1和表2)。但 The Kanto Technology Office of the Japanese Ministry of Construction, the Japan Institute of Construction Mechanization, and Kawamura Industry Co., Ltd. jointly developed a machine for grasping and unloading embankment concrete blocks in 1997—an embankment concrete block grabbing clamp (hereinafter referred to as a clamp). It solved the problem of loading and unloading of concrete blocks during flooding of rivers and embankments. Clamps can be used for grabbing 2t of 2t concrete blocks and grabbing 2t and 4t concrete blocks (Figure 1). Two types of clamps are similar in structure (parameters are shown in Table 1 and Table 2). but