Study on the effect of reinforcing method of inclined jet grouting pile to control the uneven settlement of soft soil subgrade

2021 ◽  
Author(s):  
Jian q. Xu ◽  
Zhao b. Yan ◽  
Yan t. Wang ◽  
Jin f. Liao ◽  
Zhi p. Mao ◽  
...  
Keyword(s):  
Soft Soil ◽  
Jet Grouting

New Construction Machinery Developed in Ultra-Deep High Pressure Jet Grouting Pile

2013 ◽  
Vol 734-737 ◽  
pp. 2650-2654
Author(s):  
Chuan Li Wang ◽  
Shu Qing Sun ◽  
Jian Zhong Xia ◽  
Bo Qian ◽  
Yong Sheng Li ◽  
...  
Keyword(s):  
Quality Control ◽  
High Pressure ◽  
Soft Soil ◽  
Engineering Application ◽  
Coastal Areas ◽  
Construction Machinery ◽  
Jet Grouting ◽  
New Construction ◽  
Deep Soft Soil ◽  
Soil Area

High pressure jet grouting pile has been widely used in engineering application, with the increase of depth, demand for construction machinery will increase, also the difficulty of the construction quality control. Through the deep soft soil area in southeast coastal areas in fujian actual engineering example, we have improved ultra-deep Yet Grouting Pile machinery to meet the construction requirements.

Investigation of field-installation effects of horizontal twin-jet grouting in Shanghai soft soil deposits

2013 ◽  
Vol 50 (3) ◽  
pp. 288-297 ◽  
Author(s):  
Zhi-Feng Wang ◽  
Shui-Long Shen ◽  
Chu-Eu Ho ◽  
Yong-Hyun Kim
Keyword(s):  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Soft Soil ◽  
Ground Surface ◽  
Prediction Methods ◽  
Jet Grouting ◽  
Soil Deposits ◽  
Lateral Displacements ◽  
Surface Heave

This paper presents a case study of an investigation into the responses of the surrounding ground to the horizontal twin-jet grouting method (HTJGM) in soft soil deposits of Shanghai. During the field test, the variation of pore-water pressure, lateral earth pressure, lateral displacements of the subsurface soils, and ground surface heave induced by the installation of five horizontal jet-grouted columns were monitored. The monitoring results indicate that the excess pore-water pressure reached 4 to 6 times the undrained shear strength of the soils, while maximum lateral displacements and ground surface heave were up to 80 and 17 mm, respectively. The influence range due to the installation of jet-grouted columns was between 15 and 20 times the nominal column radius. The development of prediction methods for lateral displacements and ground surface heave induced by the HTJGM installation process are presented and discussed. Results from the investigation suggest that the proposed prediction methods can be used to provide reasonable estimates of ground response and influence range of horizontal jet grouting.

Prediction of Soil-Cement Mechanical Properties Using EC2 Approach

2013 ◽  
Vol 779-780 ◽  
pp. 286-289 ◽  
Author(s):  
Joaquim Tinoco ◽  
António Gomes Correia
Keyword(s):  
Mechanical Properties ◽  
Soft Soil ◽  
Soil Mixing ◽  
Soil Cement ◽  
Jet Grouting ◽  
Eurocode 2 ◽  
Wide Range ◽  
Mechanical Properties Prediction ◽  
Strength And Stiffness ◽  
Analytical Expressions

For a better design of Jet Grouting (JG) and Cutter Soil Mixing (CSM) technologies, a set of laboratory formulations are usually prepared aiming to give a first idea of the mechanical behavior of the final mixture. However, these formulations can represent an important cost to the project. Therefore, aiming to reduce such cost, in the present work the analytical expressions proposed by Eurocode 2 for strength and stiffness prediction of concrete were adapted to soil-cement laboratory formulations for JG and CSM projects. It is shown that these expressions can be successful applied in mechanical properties prediction over time of soft soil stabilized with cement for a wide range of cement content, water cement ratios and soil types.

scholarly journals Comparison of Single and Group Jet Grouting Columns Capacity Based on Field Load Test and Theoretical Methods

2019 ◽  
Vol 5 (6) ◽  
pp. 1353-1366
Author(s):  
Ali M. Al-Kinani ◽  
Mahmood D. Ahmed
Keyword(s):  
Bearing Capacity ◽  
Soft Soil ◽  
Water Flow Rate ◽  
Theoretical Method ◽  
Load Test ◽  
Theoretical Methods ◽  
Axial Capacity ◽  
Soil Cement ◽  
Jet Grouting ◽  
Pile Load Test

The evaluation of axial capacity of jet grouted soil cement columns in soft soil is a complicated issue because it depends according to the number of factors such as, soil type, influence mixture between soil and grouting materials, nozzle jet energy, jet grouting and water flow rate, rotation and lifting speed. These parameters related to the type of jet grouting methods (single, double and triple system). Most methods of design the bearing capacity of the jet-grouting column based on experience. Therefore, some designer calculates the bearing capacity of the jet grouting column based on jet grout section capacity. In this paper, different theoretical methods have been used to estimate of the jet grouting soil-cement capacity, such as Poulos and Davis, 1980 methods and then their comparison with the pile load test calculations based on the quick pile load test as presented in ASTM-D1143-07.  Therefore, the study describes a prototype test single and group jet grout soil-cement models of arrangement (1*1, 1*2 and 2*2) for total length to diameter ratios (L/D) is 13.33 and clear spacing three times of diameter has been constructed in soft clayey soils in the right bank of the Euphrates River, at Al- Nasiriyah city. As a result, the theoretical method for estimation the bearing capacity gives unfaithful values for the single and group jet grout column compared to the load- settlement calculations obtained from field pile load test data. On the other hand, the Hansen’s 90% and Butler and Hoy’s given closer results to each other and may be considered faithful interpretation methods to compute the bearing capacity of single and group jet grouting columns.

Study on the Effect of Jet Grouting Pile Reinforcing Soft Soil Subgrade

2012 ◽  
Vol 594-597 ◽  
pp. 1420-1428 ◽  
Author(s):  
Gang Yu Liu ◽  
Bing Long Wang
Keyword(s):  
High Speed ◽  
Soft Soil ◽  
Ground Surface ◽  
Horizontal Displacement ◽  
Composite Foundation ◽  
Original Design ◽  
Obvious Effect ◽  
High Speed Railway ◽  
Jet Grouting ◽  
Ground Surface Settlement

Composite foundation is commonly used to control the soft soil subgrade settlement. Considering that post-construction settlement of high speed railway is strictly controlled, it’s supposed to use jet grouting pile to strengthen the existed composite foundation and it’s necessary to analyse the effectiveness. Take a line as an example, analyse embankment settlement regularity of the original design mixing pile reinforcement and jet grouting pile reinforcement, evaluate the effect of the jet grouting pile reinforcement. The results show that the jet grouting pile reinforcement on the basis of original design does not have obvious effect on the embankment surface and ground surface settlement control, but effectively controls horizontal displacement at toe of slope and improves the foundation stability.

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