...Kai Zhang; Yiguo Xue; Maoxin Su; Peng Wang; Shishu Zhang; Chuanqi Qu; Huimin Gong; Kang Fu; Guangkun Li Grouting is widely used to reinforce soft strata in reinforcement engineering projects, but few methods to confirm the quality of grout injection are available. Here, a multi-resistivity survey...

...Alireza Heydari Abdollahi, MSc; Ali Ghanbari, PhD Micropiles are often implemented through drilling, steel pipe installation, reinforcement and grouting. However, in some parts of the world, especially in areas with fine-grained soils, these shafts are implemented by steel pile driving, followed...

... also been qualitatively addressed. However, despite the increased use of hollow-bar micropiles, the effect of the grouting method on their performance has not been confirmed and numerical modelling of their behaviour has not been reported. No quantitative value for an increase in the bond strength...

... expansion ratio, concentration of foaming agent and the foam injection ratio were measured to be 20, 2·5% and 40% respectively. Pre-grouting and effective soil conditioning were also found to prevent excessive wear of the cutter discs and surface collapse incidents caused by face instability. 25 06...

... of very high risk. Historic tunnel construction in the heterogeneous RTD had limited success with permeation grouting, and face losses and instabilities occurred. For the case of Pal6, the railway tunnel overhead magnified the difficulties. Permeation grouting still remained the most feasible stabilising...

...Muhsiung Chang, BS, MS, PhD, PE; Ren-Chung Huang, BS, MS Generally, grout extent and ground deformation are of great concern in soil grouting practice. In this paper, the ground behaviour, injection mechanism and grout distribution relating to field grouting in soils are discussed. It is found...

...-induced settlement was mitigated through, among other measures, the use of compensation grouting. Installation of the compensation grouting array was observed to coincide with settlements of over 10 mm. The source of the settlement is attributed to the wet flush open bore method employed to install...

...Carlo Rabaiotti, Dr Sc; Cornelia Malecki, MSc; Mathias Amstad, MSc; Alexander M. Puzrin, FICE Jet grouting is a widely used technique for soil stabilisation, which provides support to geotechnical structures and buildings. One of the main problems related to this technique is excessive displacement...

... in the design of efficient fixed anchor lengths, proved highly effective. Also, the introduction of fixed anchor enhancement techniques such as end-of-casing grouting in granular soils and post-grouting in cohesive soils enabled anchor capacities more than double those previously achieved in the prevailing...

... level and was approximately 23 m below the ground surface in a silty sand layer. To remove the piles safely from the cutter head, horizontal grouting from two adjacent work pits was conducted for waterproofing and solidification purposes. By controlling the amount of soil being flushed out during...

... attempts to arrest the ingress using an expanding grout were unsuccessful, and manual monitoring showed a slow but continuing deformation of the tunnel. A detailed tunnel investigation revealed that intermittent voiding was present over a wide area. A more comprehensive tunnel investigation and grouting...

.... Features of the four pumps installed into the shaft Pump Label Depth from the ground level: m Distance from the CSM panel to the pump: m Pump 1 P1 −4·0 8·1 Pump 2 P2 −6·5 6·5 Pump 3 P3 −9·0 5·6 Pump 4 P4 −9·0 3·6 environment grouting offshore engineering...

...Vahidoddin Fattahpour, MSc, PhD; Béatrice Anne Baudet, Ingénieur ETP, MSc, PhD; James Wang-Cho Sze, MSc(Eng), MSc(IDM), CEng, MICE, MIStructE, FHKIE, RPE, RGE A series of tests is carried out using a purpose-built set-up to model compaction grouting around a pile shaft. The tests are performed...

...Zhi-Feng Wang, BEng; Shui-Long Shen, PhD; Chu-Eu Ho, ScD; Ye-Shuang Xu, PhD To reduce the impact of installation of horizontal jet grouting columns on surrounding ground, a new horizontal jet grouting technique termed controlled discharge horizontal jet grouting is developed. A field trial...

...Kai Fang, BEng; Zhongmiao Zhang, PhD; Qianqing Zhang, PhD; Xingwang Liu, PhD Pressure-grouting the shaft tip has been proven to be an effective method to improve the performance of drilled shafts. In this paper, the prestressing effect during grout injection is introduced and studied. The mechanism...

... grouting strength & testing of materials Since 1930, electro-osmosis has been used as a tool in geotechnical engineering to improve the mechanical strength of soft clay. Casagrande and Casagrande (1986) attempted to improve the strength of sensitive silty clay by electro-osmosis...

...Utkan Mutman, PhD; Aydın Kavak, PhD This study examined the effects of low-pressure grouting on soil properties at a site that is at risk of soil liquefaction. The study was conducted at a 96 m² site located in Yalova, Turkey, that is considered a first-degree seismic zone. Compaction...

...Haibo Yang, BEng, PhD; Thiam Soon Tan, PhD; Chun Fai Leung, PhD In deep excavation in soft soils, a layer of soil below formation level is often improved to stabilise the excavation. The improvement, usually by deep cement mixing or jet-grout piling, will result in the construction of a raft...

...M. Mollamahmutoglu, PhD, CEng; Y. Yilmaz, PhD, CEng The aim of this study is to investigate whether there is a loss in the strength of fine- to medium-grained colloidal-silica-grouted sand after cyclic loading. First, the rheological properties of colloidal silica grouts, such as gel time...

... Telford Ltd 2009 grouting maritime engineering sea defences Like every delta area, the Dutch delta consist of fertile lands with an abundance of (irrigation) water, which is one of the main reasons why the population of almost every delta area in the world is dense, and still increasing...