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A platform for research: civil engineering, architecture and urbanism
Shield construction method for water-rich silt stratum
The invention relates to the technical field of shield construction, in particular to a shield construction method for a water-rich silt stratum. The shield construction method comprises the following steps of (S1) shielding to reach the water-rich silt stratum for soil pressure setting; (S2) injecting bentonite into a soil bin; (S3) injecting a bentonite and water glass mixture into a shield tunneling machine in a semi-circle mode, so that a mud film is formed on the upper stratum; (S4) performing synchronous grouting and synchronous slurry supplementing in a shield tail propelling process; (S5) forming holes in the top of the 7-ring position after the shield tail is separated out for secondary supplementing of double-liquid slurry; and (S6) propelling the shield tunneling machine so as to pass through the water-rich silt stratum. According to the method, the problems of difficulty in solidification of mortar and easiness in losing in the water-rich stratum can be effectively avoided, and water leakage of a duct piece in the shield construction process of the water-rich silt stratum can be effectively controlled. The shield construction method is mainly applied to shield tunneling of the water-rich silt stratum.
本发明涉及盾构施工技术领域，更具体而言，涉及一种富水粉砂地层盾构施工方法。包括以下步骤：S1、盾构到达富水粉砂地层进行土压设定；S2、土仓注入膨润土；S3、盾构机上半圆注入膨润土、水玻璃混合物，使上部地层形成泥膜；S4、盾尾推进过程同步注浆及同步补浆；S5、脱出盾尾后7环位置顶部开孔进行二次补充双液浆；S6、盾构机推进，通过富水粉砂地层。该方法能够能够有效避免了砂浆在富水地层中不易凝固、容易流失的问题，能够有效对富水粉砂地层盾构施工过程中管片出现的渗漏水进行控制。本发明主要应用于富水粉砂地层盾构方面。
Shield construction method for water-rich silt stratum
The invention relates to the technical field of shield construction, in particular to a shield construction method for a water-rich silt stratum. The shield construction method comprises the following steps of (S1) shielding to reach the water-rich silt stratum for soil pressure setting; (S2) injecting bentonite into a soil bin; (S3) injecting a bentonite and water glass mixture into a shield tunneling machine in a semi-circle mode, so that a mud film is formed on the upper stratum; (S4) performing synchronous grouting and synchronous slurry supplementing in a shield tail propelling process; (S5) forming holes in the top of the 7-ring position after the shield tail is separated out for secondary supplementing of double-liquid slurry; and (S6) propelling the shield tunneling machine so as to pass through the water-rich silt stratum. According to the method, the problems of difficulty in solidification of mortar and easiness in losing in the water-rich stratum can be effectively avoided, and water leakage of a duct piece in the shield construction process of the water-rich silt stratum can be effectively controlled. The shield construction method is mainly applied to shield tunneling of the water-rich silt stratum.
本发明涉及盾构施工技术领域，更具体而言，涉及一种富水粉砂地层盾构施工方法。包括以下步骤：S1、盾构到达富水粉砂地层进行土压设定；S2、土仓注入膨润土；S3、盾构机上半圆注入膨润土、水玻璃混合物，使上部地层形成泥膜；S4、盾尾推进过程同步注浆及同步补浆；S5、脱出盾尾后7环位置顶部开孔进行二次补充双液浆；S6、盾构机推进，通过富水粉砂地层。该方法能够能够有效避免了砂浆在富水地层中不易凝固、容易流失的问题，能够有效对富水粉砂地层盾构施工过程中管片出现的渗漏水进行控制。本发明主要应用于富水粉砂地层盾构方面。
Shield construction method for water-rich silt stratum
一种富水粉砂地层盾构施工方法
ZHANG DEQIANG (author) / LI JIANJUN (author) / LI ZILI (author) / CAO ZHIYONG (author) / WANG LIJUN (author) / YAN XIDONG (author) / CHEN XUEWEN (author)
2021-06-01
Patent
Electronic Resource
Chinese
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