• Title/Summary/Keyword: 그라우팅 자동관리 시스템

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Application of Grouting for Liquefaction Resistance Using Automatic Grouting System (그라우팅자동관리시스템을 이용한 액상화 방지 그라우팅의 적용)

  • Kong, Jinyoung;Kang, JunO;Cho, Hyunsoo;Kim, Jinchun;Chun, Byungsik
    • Journal of the Korean GEO-environmental Society
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    • v.12 no.9
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    • pp.79-87
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    • 2011
  • This study conducted the research on the method of grouting quality management and the improvement effect by applying grouting construction's quality management technology to automatic injection management equipment through measure of liquefaction based on the case of reinforcement applying grouting at the region where liquefaction happened at section 12 site of highway construction. The pressure(p), speed(q), grouting penetration radius(R) value from injection pressure, injection speed, characteristics of grain size, and characteristics of viscosity through p-q-t chart analysis was applied to the automatic grouting system which could improve the quality management of grouting. Standard penetration test results after injection showed that N values represented 5-20 and the prevention of liquefaction became possible.

An experimental study on the improving reliability of grouting by using p-q-t chart analyzing technique (P-q-t chart 분석기법을 이용한 그라무팅 신뢰성 향상 방안에 관한 실험적 연구)

  • Chon, Byung-Sik;Choi, Dong-Chan;Kim, Jin-Chun
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.10 no.4
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    • pp.383-395
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    • 2008
  • The grouting is one of the improved techniques which is aim to decrease the permeability and to strengthen the soft ground. But The grouting method has many problems about a suitability of grouting procedure and an effectiveness of grouting after grouting work because of a technical characteristic operated inside the soil. The grouting $p{\sim}q{\sim}t$ chart of a typical index about grouting rate and time alteration of grouting pressure is one method to estimate the suitability of grouting factor with monitoring during grouting procedure. This study is automatic grouting system (AGS) which can control the testing and grouting procedures. It can make the detailed $p{\sim}q{\sim}t$ chart and analyze the grouting characters of the ground by comparing the detailed pattern of $p{\sim}q{\sim}t$ chart with standard pattern. If using the $p{\sim}q{\sim}t$ chart derived from AGS in the grouting work, it is an objective standard estimating the suitability of grouting factor with grouting materials, grouting method, grouting rate and grouting pressure, as results it expects successfully to improve reliability of the grouting work.

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Development and Reliability Verification of Quality Control System for Compaction Grouting Method (컴팩션 그라우팅 공법의 품질관리 시스템 개발 및 신뢰성 검증)

  • Seo, Seok-Hyun;Lee, Jung-Sang;Jung, Eui-Youp;Park, Sang-Yeong;Lee, Hyo-Bum
    • Journal of the Korean Geosynthetics Society
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    • v.19 no.4
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    • pp.11-20
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    • 2020
  • This study introduced the compact grouting method that can be used for improving soft ground and restoring buildings with unequal subsidence. The pump used in the traditional compact grouting method is a system that injects one hole each, which reduces the construction efficiency, and the analog injection method manually manages the construction by field workers, making it difficult to manage consistent quality. Pump and quality control system were developed to solve problems in existing construction. Since field supervisor determines amount of injected materials by using analog equipment and controls manually, it is difficult to manage consistent quality of construction. Therefore, the quality control system was developed in order to solve that problem. The quality control system consists of automatic mixing system of injection materials, multiple simultaneous injection pumps, and injection management monitoring system. Performance of the quality control system was verified through on-site testing, and ground improvement performance was verified through quality testing after testing and testing of the compact grouting method. Therefore, it is expected that the integrated quality control system developed will improve the quality assurance and efficiency and stability of construction at sites where construction and quality verification are difficult.