Experimental Study on the Shear Properties of Soil around Piles with Permeation Grouting

Wang, Guisen; Hong, Baoning; Liu, Xin; Sun, Di; Yao, Yong

doi:10.3390/app13010621

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…The most effective combination was a DP of 19 MPa, a GP of 1 MPa, a DT of 10 min, and a W/C of 1.2 (A 4 B 2 C 4 D 3 ), with which the volume of the CCJG was maximized. As with other studies, the volume of the CCJG increases with a rise in the GP and grout cement content, and the strength of the CCJG is enhanced with an increase in the cement content within the grout [31,32].…”

Section: Resultssupporting

confidence: 84%

Study on the Diffusion Parameters of Newtonian Fluid in High-Pressure Jet Disturbance Grouting

Zhang,

Xu,

et al. 2024

Buildings

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In order to investigate the diffusion mechanism of slurry in post-pile grouting, this study develops a formula for calculating the diameter and the climb height of the cement core of jet grouting (CCJG). This research conducts field orthogonal tests using a self-developed grouting nozzle to analyze the effects of disturbance pressure (DP), disturbance time (DT), grouting pressure (GP), and the water–cement ratio (W/C) on the dimensions and strength of the CCJG. The findings revealed that the theoretical formula for calculating the diameter of the CCJG deviates by approximately 8% from the field test results, confirming the formula’s validity. In addition, the DP and DT significantly influence the volume of the CCJG, displaying a linear increase with their augmentation. Conversely, the W/C and DP predominantly affect the CCJG’s strength. Notably, an increase in the W/C results in diminished strength, whereas an increase in the DP enhances it. In addition, soil reinforcement is achieved through replacement, mixing, and compaction as the grout flows outward from the center of the grouting hole. These insights offer a theoretical foundation and technical support for effective grouting construction practices.

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Section: Resultssupporting

confidence: 84%

Study on the Diffusion Parameters of Newtonian Fluid in High-Pressure Jet Disturbance Grouting

Zhang,

Xu,

et al. 2024

Buildings

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“…The software of this computer allows you to control the radar in all operating modes;  digital signal generation module, multifunctional probe signal shaper, which implements the formation of a probe signal packet in accordance with the task received from the control computer;  analog-to-digital signal processor with mezzanine DAC and ADC modules, which digitizes the analog signal coming from the radar transceiver, buffers and initially processes the signal. The carrier module contains a processor that processes radar information [8] in real time.…”

Section: Technical Appearance Of the Sar Side-viewmentioning

confidence: 99%

Radar complex for unmanned aerial vehicles

Zhdanov,

Shpak

2023

E3S Web of Conf.

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The paper considers the problem of creating a radar complex designed to detect air, sea and ground objects as well as to determine their range, speed, geometric parameters, and promptly present the results of automated processing to the operator. The goal of the work is to create a side-scan airborne radar complex with a synthetic aperture installed on an unmanned aerial vehicle. The design of the airborne radar complex has been determined. The main characteristics of the developed complex are given. The main operating modes of the combined complex as part of an aircraft are considered and described: lateral sighting and sighting in the front hemisphere. The structural and functional diagram of the X-band side-view of airborne radar equipment, consisting of an antenna, a transceiver unit, a container with a digital core and a micronavigation system, is described. In high-resolution mode, the radio hologram generated on board is sent via a communication channel to the control and processing station. Radar image formation and secondary processing are performed at a ground station in automatic mode.

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“…During the grouting process, the slurry produces a series of physicochemical effects, such as cementation and compaction in the soil around the pile, ultimately forming a "cemented soil" at the tip of the pile. This improves the physical and mechanical properties of soil at the tip and around the pile, thus enlarging the bearing capacity of the pile foundation [21,22]. In the process of grouting, piles and soil between piles form a composite foundation [23] and produce an extrusion effect [24,25], the physical and mechanical properties of the composite foundation inter-pile soil have been greatly improved [26,27].…”

Section: Introductionmentioning

confidence: 99%

Effect of Solidified Depth on the Vertical Compressive Bearing Characteristics of the Soil Continuously Solidified Pile Group Foundation

Sun,

Wang,

et al. 2023

Applied Sciences

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To meet the ultra-high bearing capacity design requirements of pile foundations under geological conditions without a good holding layer, we invented a new type of group pile foundation with the soil continuously solidified between piles (hereinafter referred to as the SCS group pile foundation). Considering the solidified depth as a key influencing factor, the vertical ultimate compressive bearing capacity, load transfer law, and damage pattern of the soil around the continuously solidified group pile foundation were investigated using an indoor half-model test. The results revealed that the setting of the continuously solidified part has a significant effect on its compressive bearing characteristics. The ultimate compressive bearing capacity of the SCS group pile foundation was increased by four to nine times compared with the traditional group pile foundation. When the pile spacing is 4–6D (D = pile diameter), designing a continuously solidified depth greater than 14D is recommended. Except for the solidified depths of 2D and 18D, the lateral resistances of the other model piles first increase and then decrease with increasing depth. The maximum values were located at the continuously solidified part and were obviously larger than those of the other pile sections. The maximum pile lateral frictional resistance was provided at the maximum depth of the continuously solidified part. After setting up the continuously solidified part, none of the bearing capacity of the pile ends exceeded 5%. The bearing capacity of the SCS group pile foundation was mainly shared by the continuously solidified part and the pile lateral frictional resistance. For the same pile spacing, the high strain damage zone of the soil at the bottom of the continuously solidified 2D–14D foundation was “abacus bead”; when the burial depth of the continuously solidified part reached 18D, the foundation soil exhibited “inverted bowl” damage.

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Experimental Study on the Shear Properties of Soil around Piles with Permeation Grouting

Cited by 8 publications

References 31 publications

Study on the Diffusion Parameters of Newtonian Fluid in High-Pressure Jet Disturbance Grouting

Study on the Diffusion Parameters of Newtonian Fluid in High-Pressure Jet Disturbance Grouting

Radar complex for unmanned aerial vehicles

Effect of Solidified Depth on the Vertical Compressive Bearing Characteristics of the Soil Continuously Solidified Pile Group Foundation

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