A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Underwater sprayed concrete construction process
The invention discloses an underwater concrete spraying construction process which comprises the following steps: forming a low-resistance operation area underwater beside an operation surface, and spraying concrete to the operation surface from the interior of the low-resistance operation area to finish reinforcing and repairing construction; the drag reducer is sprayed out to form an air curtain after being mixed with compressed gas, the air curtain is a low-resistance operation area, the mass concentration of the drag reducer is 0.01-0.65%, and the compressed gas is compressed air with the air pressure of 0.3-1.5 MPa; an interface separant is added when the concrete is mixed, the dosage of the interface separant is 0.1-0.5% of the mass of the cementing material, the early-strength alkali-free accelerator and the pressurized gas are mixed to form a mixture, and the concrete is sprayed out after being mixed with the mixture before entering a low-resistance operation area. By creating an underwater local low-resistance operation area, the dispersion risk of concrete meeting water resistance in the spraying process is reduced; and meanwhile, the high cohesion and fast setting performance of the sprayed concrete material are combined, so that the one-time spraying thickness and compactness are improved, and underwater sprayed concrete construction is achieved.
本发明公开了一种水下喷射混凝土施工工艺，包括在作业面旁侧的水下形成一个低阻力作业区，将混凝土从低阻力作业区内部喷射至作业面，完成加固修补施工；减阻剂通过与压缩气体混合后喷出形成气幕，为低阻力作业区，减阻剂质量浓度为0.01‑0.65％，压缩气体为气压0.3～1.5MPa的压缩空气；混凝土在拌制时加入界面隔离剂，其用量为胶凝材料质量的0.1～0.5％，早强无碱速凝剂与带压气体混合后形成混合物，混凝土拌制完成后进入低阻力作业区前与上述混合物进行混合后喷出。本发明通过创造水下局部的低阻力作业区，降低喷射过程中混凝土遇水阻的分散风险；同时结合喷射混凝土材料的高黏聚与快凝结性能，从而提高一次喷射厚度和密实性，实现水下喷射混凝土的施工。
Underwater sprayed concrete construction process
The invention discloses an underwater concrete spraying construction process which comprises the following steps: forming a low-resistance operation area underwater beside an operation surface, and spraying concrete to the operation surface from the interior of the low-resistance operation area to finish reinforcing and repairing construction; the drag reducer is sprayed out to form an air curtain after being mixed with compressed gas, the air curtain is a low-resistance operation area, the mass concentration of the drag reducer is 0.01-0.65%, and the compressed gas is compressed air with the air pressure of 0.3-1.5 MPa; an interface separant is added when the concrete is mixed, the dosage of the interface separant is 0.1-0.5% of the mass of the cementing material, the early-strength alkali-free accelerator and the pressurized gas are mixed to form a mixture, and the concrete is sprayed out after being mixed with the mixture before entering a low-resistance operation area. By creating an underwater local low-resistance operation area, the dispersion risk of concrete meeting water resistance in the spraying process is reduced; and meanwhile, the high cohesion and fast setting performance of the sprayed concrete material are combined, so that the one-time spraying thickness and compactness are improved, and underwater sprayed concrete construction is achieved.
本发明公开了一种水下喷射混凝土施工工艺，包括在作业面旁侧的水下形成一个低阻力作业区，将混凝土从低阻力作业区内部喷射至作业面，完成加固修补施工；减阻剂通过与压缩气体混合后喷出形成气幕，为低阻力作业区，减阻剂质量浓度为0.01‑0.65％，压缩气体为气压0.3～1.5MPa的压缩空气；混凝土在拌制时加入界面隔离剂，其用量为胶凝材料质量的0.1～0.5％，早强无碱速凝剂与带压气体混合后形成混合物，混凝土拌制完成后进入低阻力作业区前与上述混合物进行混合后喷出。本发明通过创造水下局部的低阻力作业区，降低喷射过程中混凝土遇水阻的分散风险；同时结合喷射混凝土材料的高黏聚与快凝结性能，从而提高一次喷射厚度和密实性，实现水下喷射混凝土的施工。
Underwater sprayed concrete construction process
一种水下喷射混凝土施工工艺
WEI KAI (author) / CHEN FEIXIANG (author) / ZHANG GUOZHI (author) / LIU YONG (author) / FANG HUI (author) / XIAO JI (author) / LIU KEXIN (author) / JIN LANG (author) / WEN QING (author) / MING XIN (author)
2023-12-26
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
SPRAYED CONCRETE - Construction and repair with wet-process sprayed concrete and mortar
Online Contents | 2000
Sprayed concrete for bridge construction
| British Library Conference Proceedings | 1996