在设备基础施工中,常常需要预留螺孔。过去通常采用制作整体预埋盒的方法。这种盒体上小下大,拆模时十分困难,不仅费工费时,有时还会损坏孔壁混凝土,影响基础的整体质量。为避免这种情况,我们将预埋盒进行了改进。即由4个侧面和1个底面组成木结构锥体(侧面斜度5%左右),安装时大头在下,小头在上,分别由角模、中间插模、底模、带枋和内撑构成,如图1所示。 In equipment foundation construction, it is often necessary to reserve screw holes. In the past, the method of making an integral cassette was generally used. This type of box is small and large, and it is very difficult to remove the mold. It not only costs time and labor, but also sometimes damages the concrete of the hole wall, which affects the overall quality of the foundation. To avoid this situation, we have improved the embedded box. That is to say, the wooden structure cone is composed of four side surfaces and one bottom surface (the side slope is about 5%), the big head is under the installation, the small head is on the top, and the angle mold, the middle insert mold, the bottom mold, the belt tie and the inner support respectively. Composition, as shown in Figure 1.