Structure body and foundation treatment


10:54' SA-09, 09/12/2013

HEC provides structure body and foundation treatment for new construction and repair, upgrading of existing structures (with structure grades and design stages) in following fields: hydraulic projects and rural development, hydropower projects, construction projects, transportation projects, industrial projects, sea projects and other civil projects. Details are as follows:

• Preparation of bidding documents, requirement documents, participation into bid evaluation, preparation of tender documents, bidding and project management of investigation of structure body and foundation treatment.
• Implementation of consultancy on supervision, appraisal, review, inspection, participation into scientific research subjects and compilation of standards and regulations of seepage treatment for body and foundation of the structure.
• Implementation of technology transfer guidance, human resource training in seepage treatment for structure body and foundation.
• Technology in seepage treatment for structure body and foundation:

o Completely implementing all steps in chain of seepage treatment for structure body and foundation: Investigation, design, cost estimation; Construction; Preparation of design monitoring report; preparation of as-built report.
o Taking part in explaining, reporting and working with related agencies on seepage treatment for structure body and foundation during design and construction process.

• Completely applying technologies during design and construction of grouting for seepage treatment of structure body and foundation:

o Applying current standards, regulations in Vietnam together with standards of other countries including China, Euro, Japan and United States to design grouting for seepage treatment of structure body and foundation.
o Using internal and external software for design of grouting for seepage treatment of structure body and foundation.

• Construction of grouting for seepage treatment of structure body and foundation:

o Construction of grouting for seepage treatment of structure body and foundation with traditional technologies including pure pressure grouting, segmentation downwards, upwards, general grouting, consolidation grouting, filling grouting with materials such as clay, bentonite, cement, admixture, etc.
o Grouting with advanced technology: circular grouting with high pressure up to 10Mpa.

Typical projects completed and under construction:

• Large reservoirs: Cua Dat reservoir (Thanh Hoa province), Ngan Truoi reservoir (Ha Tinh province), Ta Trach reservoir (Thua Thien Hue province), Dinh Binh reservoir (Binh Dinh province), Tan My reservoir (Ninh Thuan province), lower Krong Buk, Upper EaSoup reservoirs (Dak Lak province), etc.
• Hanoi dike, Red river embankment, Da river embankment, Sai Gon river surrounding dike, etc.
• Hydropower projects: Thac Ba, Thac Bay, Cho river, Phu Ninh, Buon Taurah, Dinh Binh, Cua Dat, Khe Dien, Krong H’Nang, etc.

Materials and equipment:

• The design of seepage treatment for structure body and foundation is carried out by engineers with over 15 years of experience. The design uses authorized software such as Autocad, Microsoft office, Roclab, Dip, etc. and specialized software set up by HEC including GP 2000 (for setting up geologic section), software for analyzing field testing data, software for establishing appendices, tables in reports, etc.
• Field equipment includes drill XY1, XY1A, Tone, Koken, B53, GX1T, etc. using diamond auger, alloy auger with diameter of 42mm, 250mm, straight drilling with depth of 300m, inclined drilling with angle of 90o and depth of 50m.
• Grouting equipment include 3-pitston pumps, specialized stopper sets and pipes which can bear grouting pressure of 100Kg/cm2.
• Self-recording equipment include TS2 (China), automatic recorder of Western countries which provide high accuracy during grouting.

Experts participated in the projects:
For details, see the Specialist.

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Address: 95/2 Chua Boc Street, Dong Da District, Hanoi - Tel: (04) 3852-6285 - Fax: (04) 3563-2169
Chief Editor: Vo Van Lung - Deputy Director General

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