These soils can be treated by compaction or by adding 15 additives to the soil. ... non-traditional expansive subgrade 26 treatment techniques using sustainable waste materials with respect to ...
A deep learning-based compaction monitoring technique for estimating soil stiffness is developed. ... 63.8, and 96.8 MN/m, are used, respectively; and the corresponding moduli of the subgrade reaction measured in the field experiment are K …
Subgrade compaction is the act of grading, shaping, and compacting the natural subgrade materials prior to placing an aggregate base or pavement. It …
0.4/D 85 (subgrade) ≤ 5, so the D 85 (subgrade) must be greater than or equal to 0.08 mm; and. 7/D 50 (subgrade) ≤ 25, so the D 50 (subgrade) must be greater than or equal to 0.28 mm. Use average gradation values for the subgrade. If both criteria are met, no fabric is necessary. Otherwise, include a fabric at the bottom of the excavation.
IC techniques rely on the interaction between the roller and the subgrade during compaction to determine the stiffness of the subgrade. Vibration of the roller drum during compaction is sensed using an accelerometer and the vibrations are analyzed in real-time to provide an estimate of the stiffness of the subgrade.
Subgrade compaction or densification using mechanical force is referred to as mechanical subgrade stabilisation (Afrin et al., 2017). ... Current expansive subgrade stabilisation techniques is focused on using chemical agents such as cement and lime in subgrade stabilisation. However, these chemical agents have limitations and prove to be non ...
1. Introduction. The high-speed railway subgrade compaction quality is controlled by the compaction degree (K), with the maximum dry density (ρ d max) serving as a crucial indicator for its calculation [1,2].The current mechanisms and methods for determining the ρ d max contribute to the determination of ρ dmax for coarse-grained soil filler in subgrades, but they …
In this study, RICM technology was combined with a real-time kinematic Beidou positioning system to monitor the compaction of subgrades filled with two types of silt. First, …
We can improve sub grade soil strength by applying compaction techniques. By doing this compaction process on sub grade soil the voids are going to reduce by cohesive attraction between sub grade soil particles. And we can add some admixtures like ordinary Portland cement, fly ash, quick lime, rice husk or by wood to get more strength for ...
The most direct subgrade settlement monitoring technique is to bury stress and strain sensors inside the subgrade, such as inclinometer tubes, layered settlement rings, ... Subgrade compaction uniformity is an important aspect to ensure the engineering performance and the long-term stability of the subgrade.
We can improve sub grade soil strength by applying compaction techniques. By doing this compaction process on sub grade soil the. voids are going to reduce by cohesive attraction …
combine to make traditional compaction techniques, and hence road construction costs, prohibitively expensive, even for ... situations where comparativel y deep subgrade soil improvement is required, as i s often recommended for …
Proper compaction of the subgrade is vital to achieve stability and prevent future settlement issues. Compaction can be done using various techniques, including mechanical compactors or vibrating plates, depending on the soil type and moisture content.
The compaction quality of a highway subgrade is influenced by the compaction parameters and soil properties. Current practice lacks reliable models to assess this multivariate situation. This paper describes a monitoring and evaluation method based on intelligent compaction (IC) and artificial neural networks (ANNs) to assess the compaction ...
Intelligent Compaction (IC) of subgrade soil has been proposed to continuously monitor the stiffness of subgrade during its compaction. Modern IC rollers are vibratory compactors equipped with (1) an onboard measuring system capable of estimating the stiffness of the pavement material being compacted, (2) Global Positioning System (GPS) sensor to …
Among the available ground improvement techniques, Dynamic compaction (DC) has gained popularity as an effective improvement technique for geomaterials over the past few decades, in view of its simplicity, low-environmental impact and cost effectiveness. ... Hamidi B, Nikraz H, Varaksin S (2011b) The treatment of a loose submerged subgrade ...
During the compaction of a road subgrade, the mechanical parameters of the soil mass change in real time, but current research assumes that these parameters remain unchanged. In order to address this discrepancy, this paper establishes a relationship between the degree of compaction K and strain ε. The relationship between the compaction degree K …
Compaction Techniques: Proper compaction is essential for achieving subgrade stability. Various compaction techniques, such as dynamic compaction and vibratory rollers, can be used to increase soil density and eliminate air voids. Compaction improves the load-bearing capacity and reduces the risk of settlement or deformation in the subgrade.
Request PDF | Application of Intelligent Compaction Technique in Real-Time Evaluation of Compaction Level During Construction of Subgrade | The long term performance of an asphalt pavement depends ...
This paper describes a monitoring and evaluation method based on intelligent compaction (IC) and artificial neural networks (ANNs) to assess the compaction quality of a highway subgrade. Field ...
This study proposes a subgrade compaction strategy that utilizes a heterogeneous dataset to estimate compaction quality across diverse scenarios while maintaining model …
This study proposes a subgrade compaction strategy that utilizes a heterogeneous dataset to estimate compaction quality across diverse scenarios while maintaining model accuracy.
By adhering to these proper compaction techniques, we lay the groundwork for paver installations that are as durable as they are aesthetically pleasing. Foundation and Subgrade Preparation Before laying pavers, it's pivotal that we establish a solid foundation and …
The importance of the reinforcement of the subgrade and particularly of its main platform is conditioned by the increase in train axle load. The analysis of the results of testing of the strength ...
Intelligent Compaction (IC) of subgrade has been pro-posed in recent years to address the shortcomings of tra-ditional QC test methods [8–12]. Modern IC rollers are ... Two different techniques are illustrated to validate the accuracy of M ICA through two separate case studies. In the first study, FWD tests were
Intelligent compaction (IC) is an innovative and modified technology used for quality control in subgrade digital construction. However, current intelligent compaction measurement values (ICMVs) cannot provide accurate measurement of the filling layer when the strength of the underlying layer is relatively high. Experimental field tests conducted in the cut …
The approach is simple and robust for stiff-over-soft conditions (e.g., base over subbase, subbase over subgrade). If such techniques are not followed in the field, LWD moduli often will be dependent on depth of influ- ence but not exactly on the layer thickness of the constructed aggregate base/subbase.
Preparation: Proper compaction and grading are essential for a reliable subgrade. The soil may be treated or stabilized to improve its bearing capacity. Subgrade Preparation Techniques Compaction. Compaction is essential to reduce voids in the soil and increase its load-bearing capacity. This is usually achieved using machines like rollers or ...
The compaction quality of a highway subgrade is influenced by the compaction parameters and soil properties. Current practice lacks reliable models to assess this multivariate situation. This paper describes a monitoring and evaluation method based on intelligent compaction (IC) and artificial neural networks (ANNs) to assess the compaction ...