A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Light slurry for shield synchronous grouting
The invention discloses light slurry for shield synchronous grouting. The light slurry comprises the following components in parts by weight: 200 to 300 parts of cement, 50 to 160 parts of light aggregate, 600 to 800 parts of fly ash, 1.0 to 1.6 parts of a water reducing agent, 10 to 16 parts of a flocculating agent, 15 to 25 parts of a thickening time control agent and 600 to 750 parts of water.Compared with the prior art, the volume weight of the light slurry for shield synchronous grouting is 1.0-1.4 kg/m<3>; the volume weight is far less than that of existing synchronous mortar, the lightslurry cannot will not quickly sink to a bottom cushion supporting pipe sheet or be taken away by the circulating slurry at the slurry discharge port below, thereby greatly reducing the loss amount after the synchronous slurry is injected, obviously improving the shield synchronous grouting effect, and effectively preventing the pipe sheets from floating upwards in the shield construction in a water-rich section. Besides, the light slurry for shield synchronous grouting is not dispersed in water, the 3d compressive strength in water can reach 0.5 MPa or above, the final setting time is shorter than 15 h, the light slurry is particularly suitable for filling building gaps between pipe sheets and surrounding rock in tunnel synchronous shield tunneling construction, and the engineering quality can be better guaranteed.
本发明公开了一种盾构同步注浆用轻质浆液，以重量份数计，其包括200～300份水泥、50～160份轻集料、600～800份粉煤灰、1.0～1.6份减水剂、10～16份絮凝剂、15～25份调凝剂和600～750份水。相对于现有技术，本发明盾构同步注浆用轻质浆液的容重1.0～1.4kg/m，远远小于现有同步砂浆，不会快速下沉到底部垫托管片或被下方排浆口的循环泥浆带走，大大减少了同步浆液注入后的流失量，明显改善盾构同步注浆效果，可有效阻止富水区段盾构施工中的管片上浮。此外，盾构同步注浆用轻质浆液在水中不分散，水中3d抗压强度能达0.5MPa以上，终凝时间小于15h，特别适用于在隧洞同步盾构掘进施工中填充管片与围岩之间建筑空隙，能更好地保证工程质量。
Light slurry for shield synchronous grouting
The invention discloses light slurry for shield synchronous grouting. The light slurry comprises the following components in parts by weight: 200 to 300 parts of cement, 50 to 160 parts of light aggregate, 600 to 800 parts of fly ash, 1.0 to 1.6 parts of a water reducing agent, 10 to 16 parts of a flocculating agent, 15 to 25 parts of a thickening time control agent and 600 to 750 parts of water.Compared with the prior art, the volume weight of the light slurry for shield synchronous grouting is 1.0-1.4 kg/m<3>; the volume weight is far less than that of existing synchronous mortar, the lightslurry cannot will not quickly sink to a bottom cushion supporting pipe sheet or be taken away by the circulating slurry at the slurry discharge port below, thereby greatly reducing the loss amount after the synchronous slurry is injected, obviously improving the shield synchronous grouting effect, and effectively preventing the pipe sheets from floating upwards in the shield construction in a water-rich section. Besides, the light slurry for shield synchronous grouting is not dispersed in water, the 3d compressive strength in water can reach 0.5 MPa or above, the final setting time is shorter than 15 h, the light slurry is particularly suitable for filling building gaps between pipe sheets and surrounding rock in tunnel synchronous shield tunneling construction, and the engineering quality can be better guaranteed.
本发明公开了一种盾构同步注浆用轻质浆液，以重量份数计，其包括200～300份水泥、50～160份轻集料、600～800份粉煤灰、1.0～1.6份减水剂、10～16份絮凝剂、15～25份调凝剂和600～750份水。相对于现有技术，本发明盾构同步注浆用轻质浆液的容重1.0～1.4kg/m，远远小于现有同步砂浆，不会快速下沉到底部垫托管片或被下方排浆口的循环泥浆带走，大大减少了同步浆液注入后的流失量，明显改善盾构同步注浆效果，可有效阻止富水区段盾构施工中的管片上浮。此外，盾构同步注浆用轻质浆液在水中不分散，水中3d抗压强度能达0.5MPa以上，终凝时间小于15h，特别适用于在隧洞同步盾构掘进施工中填充管片与围岩之间建筑空隙，能更好地保证工程质量。
Light slurry for shield synchronous grouting
盾构同步注浆用轻质浆液
CUI XUEJUN (author) / YANG HONGBO (author) / ZHAO JIANGUANG (author) / WANG HUICHENG (author) / SHI LISHENG (author) / XIE HONGHUI (author) / LIU WENBIN (author) / LI JIZU (author) / WANG HENG (author) / ZHOU WEI (author)
2020-07-31
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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