摘要：【中文】本发明公开了一种无明矾红薯粉的制作工艺，将50份红薯淀粉、0.44‑2.2份复合添加剂及30份水混合后进行打浆，随后加入30份水进行搅拌打糊，得预处理粉芡；将预处理粉芡进行煮粉糊化，随后放入粉丝机中挤压成型，得成型粉丝；将成型粉丝加入沸水煮制后放入冷水中浸泡冷却，干燥后即得一种无明矾红薯粉丝。本发明制得的无明矾红薯粉丝不添加明矾，粉丝不粘连、不断条且筋道，杜绝了铝离子对人体潜在的危害，解决了长期以来渴望解决的问题。且生产方法简单，适合于工业化生产及家庭式、小批量的人工挤压生产。公开的复合添加剂具有较广的适用范围，可以用于马铃薯淀粉、红薯淀粉及木薯淀粉生产粉丝粉条。 【EN】The invention discloses a preparation process of alum-free sweet potato powder, which comprises the steps of mixing 50 parts of sweet potato starch, 0.44-2.2 parts of compound additive and 30 parts of water, pulping, adding 30 parts of water, stirring and pasting to obtain pretreated starch; cooking the pretreated starch paste, and then putting the starch paste into a vermicelli machine for extrusion forming to obtain formed vermicelli; adding boiling water into the formed vermicelli, boiling, soaking in cold water, cooling, and drying to obtain the alum-free sweet potato vermicelli. The alum-free sweet potato vermicelli prepared by the invention is not added with alum, is not adhered, broken and chewy, avoids the potential harm of aluminum ions to human bodies, and solves the problem which is eagerly solved for a long time. And the production method is simple and is suitable for industrial production and household and small-batch manual extrusion production. The disclosed composite additive has a wide application range, and can be used for producing vermicelli from potato starch, sweet potato starch and cassava starch.

摘要：【中文】本发明涉及一种隧洞伸缩缝背后注浆的施工工艺，具体步骤如下：第一步、检测：检测盾构钢筋混凝土管内部的布筋情况，并在盾构钢筋混凝土管的表面标出内部钢筋的位置；第二步、钻孔：在盾构钢筋混凝土管的十二点钟位置钻注浆孔以及排气孔；第三步、安装注浆管和排气管；第四步、注浆：伸缩缝内注入水泥浆液，待水泥浆液从排气管中排出，封闭排气管，将注浆压力控制在0.3MPa‑0.5MPa之间，当注浆机的浆液仓内的浆液15分钟无下降，停止注浆，最后将注浆机与单向止回注浆管分开，完成注浆。本发明具有能够向伸缩缝内部止水件背后进行注浆，从而对还未出现出现漏水情况的伸缩缝进行防水预防，从而使伸缩缝在短期内不易出现渗水的情况。 【EN】The invention relates to a construction process for grouting at the back of a tunnel expansion joint, which comprises the following specific steps: the first step is detection: detecting the bar arrangement condition in the shield reinforced concrete pipe, and marking the position of an internal reinforcing bar on the surface of the shield reinforced concrete pipe; step two, drilling: drilling a grouting hole and an exhaust hole at twelve o' clock positions of the shield reinforced concrete pipe; thirdly, installing a grouting pipe and an exhaust pipe; fourthly, grouting: and injecting cement slurry into the expansion joint, sealing the exhaust pipe after the cement slurry is discharged from the exhaust pipe, controlling the grouting pressure to be between 0.3 and 0.5MPa, stopping grouting when the slurry in a slurry bin of the grouting machine does not drop for 15 minutes, and finally separating the grouting machine from the one-way non-return grouting pipe to finish grouting. The invention can perform grouting to the back of the water stop part in the expansion joint, thereby performing waterproof prevention on the expansion joint without water leakage, and ensuring that the expansion joint is not easy to leak water in a short time.