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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

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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