WHICH IS THE BETTER (in selecting vibroflotation equipment)

Comparative Analysis of Vibroflotation Equipment Series: Performance Differences and Application Scenarios from Conventional Electric Vibroflot BJVE - 426 - 180, BJVE-450-260, Variable-Frequency Electric Vibroflot BJVEF-450-225 , Hydraulic Vibroflot BJVH-350-150

In the field of vibroflotation equipment, products of different technical types and models exhibit significant differences in performance parameters and application scenarios. This article conducts a multi-dimensional comparison of four vibroflotation equipment models—BJVE-426-180 (conventional electric), BJVE-450-260 (conventional electric), BJVH-350-150 (hydraulic), and BJVEF-450-225 (electric variable-frequency)—to provide professional references for equipment selection decisions.

Main parameter comparison :

I. Comparison of Core Parameters: From Specifications to Power Performance

1. Differences in Basic Specifications

Diameter:

The diameters of the four models vary significantly, ranging from 350mm (BJVH-350-150) to 450mm (BJVE-450-260 and BJVEF-450-225), with the BJVE-426-180 measuring 426mm. Diameter directly affects the equipment's adaptability to the operating environment. Larger-diameter equipment offers a wider deep vibration influence range and compaction scope, while smaller-diameter models provide stronger penetration, greater flexibility, and produce smaller pile diameters.

Power:

Power ranges from 150kW (BJVH-350-150) to 260kW (BJVE-450-260). The electric variable-frequency model BJVEF-450-225 has a power of 225kW, and the conventional electric model BJVE-426-180 has 180kW. Power determines the equipment's vibration output capacity and continuous operating intensity.

2. Power and Vibration Performance

Speed:

Conventional electric models BJVE-426-180 and BJVE-450-260 have a fixed speed of 1450rpm, classified as constant-speed vibroflotation equipment. They are mostly used in common soft soil foundation treatment projects.

The electric variable-frequency model BJVEF-450-225 features adjustable speed (1450-1740rpm), allowing flexible adjustment of vibration frequency according to operational needs. It is suitable for soft foundations with shallow hard soil layers.

The hydraulic model BJVH-350-150 has a wide speed range (2600-2900rpm). Its high speed enables faster vibration frequency, making it suitable for complex hard soil layers.

Centrifugal Force:

Centrifugal force is the core embodiment of the equipment's "exciting force". The BJVEF-450-225 leads significantly with 520kN, followed by the BJVE-450-260 (440kN), the BJVH-350-150 (250-350kN range), and the BJVE-426-180 (280kN). High centrifugal force means the equipment can more efficiently handle high-resistance, high-load vibration operations (such as deep foundation compaction and penetration capacity in hardness soil layer).

Maximum Amplitude:

Amplitude determines the "influence width" of vibration. The BJVE-450-260 has the largest amplitude at 26mm, followed by the BJVE-426-180 (22mm), the electric variable-frequency model BJVEF-450-225 (20mm), and the hydraulic model BJVH-350-150 (only 11mm). Equipment with large amplitude provides a larger radius of influence on soil compaction around the vibration area during foundation compaction construction.

II. Analysis of Technical Types and Application Scenarios

1. Conventional Electric Models (BJVE-426-180, BJVE-450-260)

Technical Features:

Relatively simple structure, constant speed, and low maintenance costs. Suitable for projects requiring stable vibroflotation parameters and single operating scenarios.

Application Scenarios:

BJVE-426-180 (426mm diameter, 180kW power): Applicable to medium-scale foundation treatment projects, meeting the dual requirements of vibroflotation compaction and vibroflotation replacement stone column/gravel piles. Double lifting can be used for compaction construction, and the spacing between piles can be considered to be 3-4m, greatly increasing work efficiency.

BJVE-450-260 (450mm diameter, 260kW power): With its 26mm large amplitude and 440kN high centrifugal force, it is widely used in large-scale hydraulic fill sand vibroflotation compaction construction. During construction, the spacing between piles can be considered to be 4-5m, thereby reducing the number of piles and lowering construction costs.

2. Hydraulic Model (BJVH-350-150)

Technical Features:

Driven by a hydraulic system, it offers high speed (2600-2900rpm), fast vibration frequency, and quick response. However, its centrifugal force and amplitude are relatively low.

Application Scenarios:

It can quickly penetrate soil layers in complex hard geological conditions, greatly improving work efficiency. In vibroflotation replacement stone column / gravel pile construction, it produces smaller pile diameters, facilitating pile diameter control and reducing material costs.

3. Electric Variable-Frequency Model (BJVEF-450-225)

Technical Features:

Adopts variable-frequency technology with adjustable speed (1450-1740rpm), enabling flexible adjustment of vibration parameters based on the hardness of the original foundation soil. It combines high centrifugal force (520kN) and large amplitude (20mm), representing a "high-performance + high-adaptability" solution.

Application Scenarios:

Provides adjustable penetration capacity in complex geological formations and offers a large vibration influence range in vibroflotation compaction projects.

III. Equipment Selection Recommendations

Prioritize conventional electric models: For construction in regular soft soil layers with limited budget, the BJVE-426-180 is a cost-effective choice.

Prioritize the conventional electric model BJVE-450-260: Suitable for rapid vibroflotation compaction projects in regular soil layers.

Prioritize the hydraulic model: In complex soil layers and vibroflotation stone column/gravel pile projects with high stone material costs, the BJVH-350-150's high-speed advantage can be fully utilized.

Prioritize the electric variable-frequency model: For vibroflotation compaction in complex geological conditions, with emphasis on long-term energy efficiency and equipment adaptability, the BJVEF-450-260's technical advantages deliver more efficient and precise operational performance for projects.

In summary, the four vibroflotation models differ in technical routes and performance, making each suitable for specific needs and operating scenarios. Equipment selection should consider core project factors such as project types, geological conditions, operational efficiency, and budget to identify the most suitable equipment solution.