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Deep Vacuum Drainage and Consolidation Dewatering Method - Super Well Point Method

Deep Vacuum Drainage and Consolidation Dewatering Method - Super Well Point Method

This is a new drainage method that solves the disadvantages of (gravity drainage + forced drainage) while incorporating their advantages.

The Super Well Point Method enables forced drainage while maintaining a vacuum inside the well by using a special double-pipe structure (special separate screen) for the trainer section, as opposed to conventional well point methods (forced drainage), deep well methods (gravity drainage), and vacuum deep well methods. ◎ For more details, please download and view the catalog.

  • Ground improvement
  • Roof and gutter construction
  • Special Construction Method

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Characteristics and Application Technologies of the Super Well Point Method

Characteristics and Application Technologies of the Super Well Point Method

I asked the branch manager of Asahi Techno Tokyo about the characteristics and application technologies of the SWP method.

The document is an interview article with Mr. Tetsuji Ozaki, the branch manager of Asahi Techno Co., Ltd. Tokyo. It introduces the characteristics and application technologies of the "Super Well Point Method." This method significantly improves groundwater collection capacity by utilizing suction force (negative pressure) from a vacuum pump in addition to gravity. It demonstrates a collection capacity that is 1.5 to over 20 times greater than that of gravity drainage wells, and it also requires less than half the number of construction points compared to conventional methods, contributing to substantial cost savings. Additionally, the technology is applied in ground improvement and soil contamination countermeasures, as well as in methods such as consolidation dewatering for soft cohesive soil layers. 【Contents】 ■ Introduction ■ Features of the SWP Method ■ Social Recognition and Basic Research ■ Application Technologies of the SWP Method ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

  • Special Construction Method
  • Water Treatment Plant

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Method for lowering groundwater levels associated with the construction of sewage treatment facilities in coastal lowland areas.

Method for lowering groundwater levels associated with the construction of sewage treatment facilities in coastal lowland areas.

Prior to the SWP construction method, a pumping test was conducted! Successfully achieved a favorable drop in groundwater levels.

In the construction of the sewage treatment facility (inflow pump building) under construction in Nishi Ward, Fukuoka City, we conducted a "pumping test prior to the implementation of the Super Well Point method." The test site was under pressure, and to achieve the necessary water level for preventing heave, a significant amount of groundwater needed to be pumped out, raising concerns about the lowering of the surrounding groundwater level. Therefore, we conducted a comparative study of methods for lowering groundwater levels. By utilizing the "SWP method," which has a high pumping capacity, we aimed to lower the groundwater level, and as a result of the pumping test, it was confirmed that the intended objectives were achieved. [Test Details] ■ Test Site: Sewage treatment facility construction in coastal lowland area (Nishi Ward, Fukuoka City) ■ Method Used: Super Well Point Method ■ Test Content: Pumping Test *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment
  • Water Treatment Plant
  • Special Construction Method

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New groundwater lowering method using a vacuum pump

New groundwater lowering method using a vacuum pump

Significant, rapid, and efficient lowering of groundwater levels! Development of a construction method using vacuum pumps!

We would like to introduce a new method developed for lowering groundwater levels, which is used when constructing structures underground: "A new method utilizing vacuum pumps." In this newly developed method, the height of the groundwater level in the well is adjusted using a vacuum pump, allowing for the simultaneous recovery of underground air around the well along with the groundwater. This method achieves a significant, rapid, and efficient lowering of the groundwater level, while ensuring that the surrounding groundwater level does not decrease significantly when surrounded by steel sheet piles. This method addresses concerns that have been raised regarding the lowering of groundwater levels around excavation sites in conventional deep well methods used for underground excavation. 【Features】 ■ Significant, rapid, and efficient lowering of groundwater levels ■ Surrounding groundwater levels do not decrease when surrounded by steel sheet piles ■ Also gaining attention as a method for recovering oil and other substances from contaminated soil and for ground consolidation dewatering *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment
  • Water Treatment Plant
  • Special Construction Method

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Three-dimensional analysis of groundwater flow around pumping wells under negative pressure propagation effects.

Three-dimensional analysis of groundwater flow around pumping wells under negative pressure propagation effects.

Investigation of flow characteristics through three-dimensional analysis! Introducing insights gained from the results.

This document summarizes the "Three-Dimensional Analysis of Groundwater Flow around Pumping Wells under Negative Pressure Propagation Effects." We applied a three-dimensional saturated-unsaturated numerical analysis model, developed for the negative pressure well method, which considers the water balance within the well, to a simulated excavation site. We conducted an analysis of groundwater level reduction due to the negative pressure well method and examined its flow characteristics. As a result of the study, we gained insights that by aligning the boundary conditions provided by the well with the negative pressure well method in the numerical analysis model of groundwater reduction by the well, we could express the water level reduction of the negative pressure well method. [Contents] ■ Introduction ■ Overview of the Structure and Water Absorption Principle of the Negative Pressure Well Method ■ Basic Equations of the Negative Pressure Well Method ■ Results of Numerical Analysis Assuming Excavation Work ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

  • Special Construction Method
  • Water Treatment
  • Water Treatment Plant

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Study on Water Level Decline in Improved Vacuum Deep Well Method

Study on Water Level Decline in Improved Vacuum Deep Well Method

Numerical analysis of conventional water surface lowering methods and improved types! Let me introduce the research content.

This document summarizes the study on "Investigation of Water Level Decline in Improved Vacuum Deep Well Method through Saturated-Unsaturated Flow Analysis." A comparison of the amount of water level decline when adopting the improved vacuum deep well method and the deep well method within an area enclosed by incomplete penetration sheet piles was conducted using three-dimensional saturated-unsaturated flow numerical analysis. The numerical analysis results indicated that the improved vacuum deep well method leads to a deeper decline. [Contents] ■ Introduction ■ Fundamental Equations ■ Numerical Calculation Method ■ Analysis Area and Calculation Conditions ■ Numerical Analysis Results and Discussion *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment
  • Water Treatment Plant
  • Special Construction Method

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Catalog "Overview of SWP Method"

Catalog "Overview of SWP Method"

When the groundwater level drops, it draws in underground air! Introducing the groundwater level lowering method 'SWP Method'.

This catalog introduces the "SWP method," which collects groundwater using a vacuum pump (negative pressure) in addition to gravity, and lifts the groundwater with a submersible pump. We provide clear explanations of the structure and verification content, as well as comparisons of groundwater level lowering methods, accompanied by diagrams and photographs. 【Contents】 ■ SWP well structure ■ Mechanism of the SWP method ■ Comparison of groundwater level lowering methods ■ Verification through experiments ■ Verification through analysis ■ Case studies *For more details, please refer to the PDF materials or feel free to contact us.

  • Special Construction Method
  • Water Treatment
  • Water Treatment Plant

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Introduction of News Article: "Super Well Point Method"

Introduction of News Article: "Super Well Point Method"

Received the Commissioner of the Patent Office Encouragement Award! Tackling groundwater issues and steadily expanding results!

We would like to introduce an article from the Construction Communication News featuring the "Super Well Point Method." The SWP method is a type of dewatering method that applies vacuum pressure to a dewatering well installed underground, efficiently lowering the groundwater level in the surrounding soil through a special screen. This article includes interviews with seven individuals involved in the SWP method and explanations of various groundwater lowering methods, all featured on the front page. [Contents] ■ Interviews - Shigekichi Takahashi, President of the Super Well Point Association - Takayuki Yamane, Deputy Director of the National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism, among others ■ Recipient of the "Commissioner of the Patent Office Encouragement Award" ■ Explanation of groundwater lowering methods (SWP method, VPRW method, SWPJr method) *For more details, please refer to the PDF document or feel free to contact us.

  • Special Construction Method
  • Water Treatment
  • Water Treatment Plant

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Development of a New Soft Ground Improvement Method Using Pore Water Suction and Superimposed Load

Development of a New Soft Ground Improvement Method Using Pore Water Suction and Superimposed Load

Introduction of the improvement principles, operation methods, and improvement effects regarding the development of a new soft ground improvement method.

This document summarizes the development of a new soft ground improvement method using pore water suction and surface load application. The Super Well Point method (SWP) is an improved version of the vacuum deep well technique, which enables efficient drainage of pore water from various types of ground, including cohesive soils, by separating and suctioning pore water and air within the ground. Using this SWP method, we have developed a technique to promote the settlement of soft cohesive soil layers and improve soil properties. As a result of the improvement, applying this method to alluvial cohesive soil layers and introducing air temporarily caused ground uplift, and continued suctioning has shown to promote settlement. [Contents] ■ Introduction ■ Improvement Principles ■ Arrangement and Operation Procedures of Suction Mechanisms ■ Improvement Effects ■ Future Developments *For more details, please refer to the PDF document or feel free to contact us.

  • Civil Engineering Method
  • Ground foundation construction method
  • Special Construction Method

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Paper on the SKK Method

Paper on the SKK Method

Improvement of soil quality in soft excavation soil using the gap water suction method (SKK method).

The "Tajiri District Drainage Channel No. 3 Construction" is a project to construct a road tunnel with an excavation length of 134 meters in the Tajiri Takaya area of Ichikawa City, Chiba Prefecture, close to the Tokyo Metro Tozai Line. The tunnel will be built using an open-cut method with an excavation width of approximately 30 meters and a depth of about 15 meters. Due to concerns about insufficient trafficability and deteriorating construction conditions during soil removal, the project utilized the SKK method, which combines the Super Well Point (SWP) method with suction pipes to improve soil quality by extracting pore water and underground air from the soft ground, thereby addressing these issues. The "Paper on the SKK Method" reports the results of confirming the applicability of the SKK method for soil improvement through trial construction and actual construction. 【Contents】 - Overview of the SKK Method - Confirmation of soil improvement effects through on-site trial construction - Application results of the SKK Method (verification in actual construction) For more details, please contact us or download the catalog.

  • Special Construction Method

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Comparison of Groundwater Lowering Methods

Comparison of Groundwater Lowering Methods

High pumping capacity! Comparison of the Super Well Point Method and other groundwater lowering methods.

This document compares three groundwater lowering methods: the "Super Well Point Method," the "Deep Well Method," and the "Well Point Method." It provides detailed information on each method, including an "Overview Diagram," "Principles (Pumping Methods)," and "Advantages and Disadvantages." The Super Well Point Method is effective not only for lowering groundwater levels but also for countermeasures against bulging, promoting consolidation, and landslide prevention. It is often adopted as a widespread groundwater lowering method for facilities such as adjustment ponds. We encourage you to read it. [Contents] ■ Methods (Division of Functions) ■ Overview Diagram ■ Principles (Pumping Methods) ■ Supplementary Principles ■ Advantages and Disadvantages *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment
  • Water Treatment Plant
  • Special Construction Method

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Groundwater Measures for the Main Underground Works of the Sendai Airport Access Railway

Groundwater Measures for the Main Underground Works of the Sendai Airport Access Railway

Introducing SWP method and VPRW method as foundation work and groundwater control technologies!

This document presents information on "Groundwater Measures in the Underground Main Construction of the Sendai Airport Access Railway." In this construction, the "Super Well Point Method" was adopted as the groundwater lowering method, and the "Vacuum Press Type Recharge Well Method" was used as the treatment method for returning pumped groundwater back underground. We introduce the methods that have also resolved issues such as the high concentration of dissolved iron in groundwater, starting from the comparative examination stage. [Contents] ■ Introduction ■ Overview of the Construction and Site Conditions ■ Overview of SWP Method and VPRW Method ■ Construction Details ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

  • Special Construction Method
  • Water Treatment
  • Water Treatment Plant

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A&S Method Case Studies

A&S Method Case Studies

A detailed explanation of Asahi Techno's ground improvement technology with examples!

This document provides a detailed explanation of the ground improvement technology developed as one of the methods of consolidation dewatering, known as the "SKK Method." It includes examples of consolidation dewatering using the "SKK Method" implemented in residential areas in the Kanto region. [Contents] ■ Ground improvement technology using the SKK Method ■ Overview of consolidation dewatering methods ■ Overview of the SKK Method ■ Examples of consolidation dewatering using the SKK Method ■ Challenges *For more details, please refer to the PDF document or feel free to contact us.

  • Ground improvement
  • Ground foundation construction method
  • Special Construction Method

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Groundwater lowering method associated with large-scale excavation work for the construction of a sewage treatment facility.

Groundwater lowering method associated with large-scale excavation work for the construction of a sewage treatment facility.

Adopting the "SWP" method for groundwater level lowering associated with excavation work! Contributing to dry work.

At the Hachioji Water Reclamation Center in the middle reaches of the Tamagawa River, the "Super Well Point Method" was adopted for groundwater lowering techniques in conjunction with the construction of a new treatment facility (western water treatment facility). After selectively operating based on excavation depth and groundwater lowering conditions, the groundwater level remained relatively stable overall. At this time, the pumping volume was also stable, and while maintaining this state, excavation of the floor surface at the deepest point was carried out. It was confirmed that there was no spring water at the floor surface and that it was in a dry state, indicating that the groundwater level at the excavation surface had been lowered to a significant depth. [Summary] ■ Test Site: Hachioji Water Reclamation Center located on the right bank of the middle reaches of the Tamagawa River ■ Adopted Method: Super Well Point Method ■ Purpose: Groundwater lowering technique during excavation work *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment
  • Water Treatment Plant
  • Special Construction Method

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Measures against bulging and condensate recovery associated with the reconstruction of the cleaning plant.

Measures against bulging and condensate recovery associated with the reconstruction of the cleaning plant.

Introducing examples of adopting the "SWP method" and "VPRW method" in factory reconstruction work.

In the reconstruction work of the Nerima Cleaning Plant of the Tokyo 23 Wards Cleaning Administrative Union, the "Super Well Point Method" and the "Vacuum Press Type Recharge Well Method" were adopted as measures against heaving and dry work, as well as for the treatment of pumped groundwater. As a result of using these two methods, the water levels of the confined groundwater and free water were lowered to the target level, preventing heaving and allowing excavation to proceed with dry work. Additionally, the pumped groundwater was able to be recharged through a recharge well. Furthermore, there was no decrease in the groundwater level in the shallow layer outside the retaining wall. [Overview] ■ Site: Reconstruction of the Nerima Cleaning Plant of the Tokyo 23 Wards Cleaning Administrative Union ■ Purpose and Methods - "Super Well Point Method" as a measure against heaving and dry work - "Vacuum Press Type Recharge Well Method" for the treatment of pumped groundwater *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment
  • Water Treatment Plant
  • Special Construction Method

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