Ground Improvement with Jet Grouting Solutions at the New Cruise Terminal in Lisbon, Portugal

Pinto, Alexandre; Tomásio, Rui; Marques, Gonçalo

doi:10.1016/j.proeng.2016.06.176

Cited by 11 publications

(5 citation statements)

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“…HPJG has favorable pile-forming performance, and the soil was compressed via the thick slurry injection in a borehole to realize surface uplift, which was different from pressure grouting. is method had a smaller dispersion area, and the effect of single piles on the surface uplift was less obvious than that of pressure grouting; hence, the superposition effect of multi-HPJG grouting comprising multiple jet grouting piles can effectively realize the purpose of rectification [2][3][4][5].…”

Section: E Uplift Mechanism Of Hpjgmentioning

confidence: 99%

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Firefly Optimization Algorithm for the Prediction of Uplift due to High‐Pressure Jet Grouting

Dai

Zhang³

2020

Advances in Civil Engineering

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A project that needs to be uplifted by high-pressure jet grouting (HPJG) is exposed to particular geological and engineering circumstances; meanwhile, HPJG has intense subjectivity, short of the theoretical base, to ascertain the influence angle β and enlarged radius Δ a , which are the main parameters that affect the uplift effect. Therefore, we proposed a new method based on the firefly optimization algorithm to search for the optimal solution for the target function. Stochastic medium theory (SMT) was used in this article, in which the effect of single-pile HPJG was simulated as the superposition effect of the foam slurry at the same distance, to construct a stochastic medium prediction model of the effect of uplift due to multi-HPJG. In accordance with the range of the prediction results of single-pile HPJG and combined with in situ monitoring data to define the target function, the optimal parameters are substituted into the prediction model to predict the subsequent uplift effect due to HPJG. As a result of the global optimization capacity and by comparison with the genetic algorithm, the FOA has a greater advantage in terms of effectiveness and precision. Finally, it is proven that the prediction result meets the requirement of the prediction in advance by statistical data.

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Section: E Uplift Mechanism Of Hpjgmentioning

confidence: 99%

“…HPJG construction technology was developed in Japan in the 1970s and has been used as a primary technique in ground reinforcement projects because it has a wide range of applications in small working spaces; however, piles provide a higher bearing capacity [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Firefly Optimization Algorithm for the Prediction of Uplift due to High‐Pressure Jet Grouting

Dai

Zhang³

2020

Advances in Civil Engineering

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“…Grouting theory is the basis for the study of slurry diffusion rules, which can provide guidance for the design and implementation of grouting engineering [17][18][19][20][21][22]. The existing grouting theories mainly include pore rock mass grouting theory [23], fractured rock mass grouting theory [24], fracturing grouting theory [25], compaction grouting theory [26], and dynamic water grouting theory [27]. Theoretical analysis is an effective means to study the rules of slurry diffusion, in which the rule of slurry flow in a single fracture is the basis of the study of slurry diffusion rules.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Mechanism of Slurry during Grouting in a Fractured Aquifer: A Case Study in Chensilou Coal Mine, China

Zhai

Bai

2022

Mathematics

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Grouting is one of the main technical means to prevent water inrush hazards in coal seam floor aquifers. It is of great significance to elucidate the diffusion law of slurry in the process of grouting in fractured aquifers for safe mining in coal mines. In this paper, the mechanism of slurry diffusion in horizontal fractures of fractured aquifers was studied based on the Bingham slurry with time-varying characteristics; additionally, a one-dimensional seepage grouting theoretical model considering the temporal and spatial variation of slurry viscosity under constant grouting rate was established. In this model, the grouting pressure required by the predetermined slurry diffusion radius can be obtained by knowing the grouting hole pressure and injection flow. Slurry properties, fracture parameters, grouting parameters, and water pressure were the parameters affecting the slurry diffusion process. Looking at the problem of water disaster prevention of coal seam floor in the Working Face 2509 of the Chensilou Coal Mine, according to the aquifer parameters and model calculation results, a grouting scheme with a slurry diffusion radius of 20 m and grouting pressure of 12 MPa was proposed. Finally, with the comparative analysis of the transient electromagnetic method (TEM) and water inflow before and after grouting, it was verified that the design grouting pressure and the spacing of grouting holes were reasonable and the grouting effect was good.

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“…Jet grouting is a soil treatment technique adoption a high hydraulic energy to destroy the surrounding soil. Ground improvement by Jet grouting technology can be used in varied and difficult geological and geotechnical situations, showing its practical and economic advantages, in addition to the importance of the performance control on site, before and during the construction of the final foundations [2].…”

Section: Introductionmentioning

confidence: 99%

“…When soil particles were excavated then spoil outside the hole and recouped with cementing materials such as Portland cement to create a soil cement column aspect (soilcrete) [3] Construction of spoil, which could then again be recycled or integrated on the ground works [4]. When designing jet injection columns, change in the length of the jet grout columns and soil conditions must be carefully and correctly defined [5].…”

Section: Introductionmentioning

confidence: 99%

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

Al-Kinani

Ahmed

2019

Civ Eng J

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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.

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Ground Improvement with Jet Grouting Solutions at the New Cruise Terminal in Lisbon, Portugal

Cited by 11 publications

References 0 publications

Firefly Optimization Algorithm for the Prediction of Uplift due to High‐Pressure Jet Grouting

Firefly Optimization Algorithm for the Prediction of Uplift due to High‐Pressure Jet Grouting

Diffusion Mechanism of Slurry during Grouting in a Fractured Aquifer: A Case Study in Chensilou Coal Mine, China

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

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