菱建基礎 List of Products and Services

The "H-type PC pile" is a prestressed concrete member with an H-shaped cross-section manufactured in a factory, and it is a construction method for building retaining walls by continuous driving using a three-point pile driver. During construction, it is used as a temporary retaining wall, and during the permanent phase, it is used as the completed structure. The cross-sectional dimensions are available in three types: width 1070(mm) × height 540, 640, 740(mm), and the design standard strength of the concrete is 70(N/mm²). 【Features】 ■ No need for temporary retaining walls ■ Self-supporting wall heights of up to approximately 8.5(m) are possible ■ Rigid connection with base and top slabs is possible ■ Leakage suppression effect for groundwater and other water ■ Drainage effect for rainwater and other sources ■ Low noise and low vibration construction method ■ Shortened construction period on site *For more details, please refer to the PDF materials or feel free to contact us.

• Retaining wall
• Civil Engineering Method
• Special Construction Method

With the diversification of construction methods and the increasing complexity of site conditions in urban redevelopment projects, there has been a demand for the development of multifunctional and compact construction machinery, as well as the emergence of efficient construction methods. In this context, the "Multi-Drill Method" allows for multiple construction methods to be accommodated by exchanging tools on the same drilling machine, enabling economical construction. It is capable of excavating hard ground such as cobblestones and mudstone with various tools, as well as removing underground structures and precast piles, while offering good mobility of construction machinery, making it suitable for work in narrow spaces. 【Features】 ■ Good mobility of construction machinery, ideal for work in narrow spaces ■ A series of operations from underground obstacle removal to pile construction can be performed with the same machine ■ Compatible with all-casing piles, earth drill piles, and enlarged base pile methods ■ Allows for the prior removal of underground obstacles and replacement with quality soil for retaining piles ■ Capable of constructing columnar piles *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction
• Ground foundation construction method
• Pile and foundation work

The "KCTB cast-in-place steel pipe concrete pile" is a composite of steel pipes and concrete, featuring high ductility and strong resistance to earthquakes. By reducing the shaft diameter, the amount of excavated soil and concrete can be reduced by up to 40%. It can withstand large bending and shear forces. Additionally, the upper limit of the concrete design strength (Fc) is 45 N/mm², ensuring high safety and enabling economical design. 【Features】 ■ Significantly reduced shaft diameter compared to ordinary cast-in-place concrete piles ■ High ductility provides great safety during earthquakes ■ High bending stiffness and shear resistance ■ High design flexibility ■ High concrete design strength *For more details, please refer to the PDF materials or feel free to contact us.

• Foundation construction
• Concrete sheet piles and piles
• Ground foundation construction method

The "Power Blender Method" is a ground improvement technique that creates a continuous, homogeneous improved body even in multi-layered ground. The methods for adding improvement materials include "slurry injection," "powder injection," and "surface spreading." The selection is made according to the improvement depth, target soil type, and site conditions. With the construction management device, verticality, improvement depth, chain speed, and other parameters can be monitored in real-time, enabling highly reliable construction. 【Features】 ■ Improvement up to 13m is possible ■ Highly reliable construction is achievable ■ Excellent mobility ■ Adaptability for close-proximity construction ■ Environmentally conscious *For more details, please refer to the PDF materials or feel free to contact us.

• Renovation and repair methods
• Ground improvement
• Ground foundation construction method

The "Tsubasa Pile (Steel Pipe Rotational Press-in Pile)" is a method that involves rotating a steel pipe pile equipped with semicircular steel plates (tip wings) at the tip, which are installed in a crossed manner, to penetrate the ground with low noise and low vibration. The tip wings are expanded to 1.75 to 2.5 times the pile diameter, contributing to a significant tip bearing capacity when functioning as a pile, and providing thrust to the pile during the rotational penetration process. There are two types of tip shapes: "closed-end type" and "open-end type." Inclined piles that can respond to horizontal forces are also possible. 【Features】 ■ Achieves large tip bearing capacity ■ Environmentally friendly construction method ■ Cost reduction ■ By using an enlarged head structure, it has horizontal resistance, excellent seismic performance, and reduced costs ■ Easy to remove *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "TBH Method" is a construction method applied in cast-in-place pile work, utilizing a specialized drilling machine equipped with a reverse circulation mechanism and a top drive system. Compared to the BH method, which employs a positive circulation mechanism and spindle system, this method facilitates large-diameter drilling as a permanent pile. In addition to the conventional reverse method, this technique can also be executed under narrow and low-space construction conditions. Due to the reverse circulation drilling method, issues related to the settling and sedimentation of slime generated during drilling have been resolved, allowing for reliable management and construction. 【Features】 - The construction machinery is compact, enabling work in confined spaces. - It can be executed even in low working heights, such as under elevated structures or indoors. - It is lightweight and small, making transportation easy even on narrow access roads. - Heavy machinery is not required for the assembly and disassembly of the machine. - Noise and vibration levels during construction are extremely low. *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "Reverse Circulation Drill Method" was developed by the Salzgitter company in West Germany and introduced to Japan in 1962. It utilizes clean water, stabilizing the borehole walls with a static water pressure of 0.2 kg/cm (water head difference of 2.0 m) and a mud film created from clay and silt particles contained in the circulating water. By rotating the bit to cut the ground and discharging the excavated soil along with the borehole water to the surface using a suction pump, drilling is achieved. This method can accommodate deep drilling and, by using a special bit to increase torque, can also drill through bedrock. 【Features】 - Capable of constructing large-diameter (φ3000mm) piles at great depths (approximately 75m) - Construction is possible in water and low head conditions - Bedrock drilling is possible by using a special bit to increase torque - Due to reverse circulation natural mud water drilling, construction can be performed without collapse even in sandy soil conditions - Can be executed with low vibration and low noise *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "Vibrator Tremie Method" is a construction technique that prevents issues such as poor pile head quality due to insufficient concrete filling, and enables the creation of high-quality cast-in-place concrete. By equipping the tip of the tremie pipe with a vibration device, it is possible to effectively ensure fluidity by directly applying vibrations to the concrete being extruded from the pipe. Additionally, since the vibration device is inserted into the concrete from the start of the pouring process, it also prevents the inflow of impurities and water from within the hole (stabilizing fluid). 【Features】 ■ Simultaneous compaction of concrete during pouring ■ Reduced interference with half-round or sharp hooks of rebar due to a small diameter of 250mm inner diameter and 420mm outer diameter ■ Fewer excess wires to prevent issues such as disconnection or leakage ■ Ability to adjust the amount of vibration while checking pressure with a digital gauge *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "Earth Drill Method (Bell Earth Method)" protects the hole walls using a standpipe and stabilizing fluid, while excavation is performed by rotating a drilling bucket to cut the ground and discharge the soil contained in the bucket to the surface. For shaft excavation, a construction method suitable for the ground (full casing, reverse, earth drill) can be selected. The highly sealed bucket ensures the reliable removal of slime from the bottom of the hole, and the powerful rotational torque allows for large-diameter and deep excavation. 【Features】 ■ Shaft excavation allows for the selection of a construction method suitable for the ground ■ The four-wing excavation pit enables the construction of an excellent bell shape ■ The highly sealed bucket reliably removes slime from the bottom of the hole ■ Powerful rotational torque allows for large-diameter and deep excavation *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "SENTAN Pile Method" is a construction method based on the all-casing method. After excavation is completed, a split concrete ring installed at the bottom of the hole is pushed in with a load of 2,000 kN/m² or more for each ring, thereby strengthening the tip ground and allowing for pile installation. It is suitable for structures with uneven settlement or strict settlement restrictions, and is appropriate for foundations of railway viaduct construction divided into first and second phases, as well as for the widening of road bridge piers. 【Features】 ■ Dramatic improvement in pile reliability ■ Reduction in total costs ■ Applicable to various structures ■ Compliance with design standards *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "BKF method" is a groundbreaking technique that achieves low noise and low vibration through a hydraulic transmission hammer grab, replacing traditional excavation methods using swinging or fully rotating all-casing hammer grabs. It allows for vibration-free excavation without free fall, and excavation can be performed without hoses or units, ensuring both vibration-free and noise-free operations. By winding or warming the spring several times, the cutting edge gradually penetrates, increasing excavation efficiency. 【Features】 ■ Low noise crown; no impact noise ■ Vibration-free; maximum excavation depth of 100m ■ No components that could cause damage ■ No hoses required, eliminating wasted time ■ Reliable excavation without affecting technology *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "Expanded Base Pile Method" is a construction technique that allows for the removal of existing underground structures and pile foundations of previous buildings while simultaneously installing new piles for a new building. During the pile construction of the new building, the removal of existing underground structures and piles can also be carried out at the same time. Additionally, when used in conjunction with the Earth Drill Expanded Base Pile Method, it meets a wide range of needs for the piles of new buildings. 【Features】 ■ Shortened construction period ■ Cost reduction ■ Avoidance of issues related to the remaining underground structures ■ Removal of obstacles and pile construction can be done in one process ■ Pile installation can be performed without being affected by the backfill condition after obstacle removal *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

Our company has carried out the "Removal of Existing Structures" using the all-casing method. The all-casing method, introduced from France's Benot company, has evolved with the times, transitioning from a swinging type to a fully rotating type. What was once difficult, such as excavating hard rock and reinforced concrete, has become possible due to advancements in technology and skills, as well as the experience we have gained. It is now actively used in the removal of underground structures associated with redevelopment projects and in new foundation construction. 【Obstacle Removal Flow】 1. Installation 2. Excavation (reaching the obstacle) 3. Press-in excavation 4. Excavation 5. Obstacle crushing 6. Obstacle removal complete 7. Backfilling (fluidized treated soil) 8. Backfilling complete *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction

The "All Casing Method" is a technique that involves excavating the interior while protecting the drilling hole with a casing tube. At Hishiken Kiso Co., Ltd., we offer various application methods, including not only obstacle removal but also low-noise and low-vibration excavation using hydraulic hammer grabs, and reinforcement of the ground at the tip using concrete rings. 【Advantages of the "All Casing Method"】 ■ Minimal impact on surrounding ground ■ Capable of excavating bedrock, boulders, cobblestones, and cutting reinforced concrete ■ Beneficial for environmental conservation measures, such as wastewater treatment and consideration for groundwater ■ Low moisture content in excavated soil, making residual soil disposal relatively easy ■ The side friction force is comparable to driven piles due to the absence of stabilizing fluids or mud water *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Civil Engineering Method
• Foundation construction