STABILIZE THE FACES OF DEEP EXCAVATION WITH SOIL NAILING TECHNIQUE IN URBAN AREAS

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TAGHI ZADEH GHAHI E.A.

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Journal: HONAR-HA-YE-ZIBA Year:2008 | Volume:- | Issue:35 Page(s): 51-61

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Title

STABILIZE THE FACES OF DEEP EXCAVATION WITH SOIL NAILING TECHNIQUE IN URBAN AREAS

Author(s)

TAGHI ZADEH GHAHI E.A. | Issue Writer Certificate

Keywords

DEEP EXCAVATIONQ3

DISPLACEMENTQ3

FAILUREQ3

SOIL NAILINGQ3

STABILIZINGQ3

TECHNIQUEQ3

Abstract

With increasing densities in limited denser areas of the cities, the number of building stories and consequently the depth of the excavations increase proportionately. The increase in excavation depth is usually accompanied by risks of instability and FAILURE of the exterior parts and walls of the excavated areas. Articles 38 and 132 of the Civil Law of Iran and Issues 7 and 12 of Building Code of Iran allow excavation only when the necessary precautionary measures for the safety of the adjacent areas have been taken into consideration. Therefore it is important to make sure that the necessary safety factors have been taken into consideration for the life span of the STABILIZING structures. The results obtained from a research project entitled “A survey on the degree of implementation of issue 12 of the Building Code of Iran in the City of Tehran”, carried out in the year 1383 by this author, indicate that 40 percent of the cases studied had followed the necessary STABILIZING measures for the exterior parts of the excavated areas and in only 17 percent of the cases studied the steps taken towards stabilization of the exterior parts of the excavated areas were found to be appropriate and adequate. The appropriate TECHNIQUE for excavation is usually selected based on many factors such as: soil type and property, underground water table level, depth and the dimensions of the excavation, site condition, the condition of the adjacent area, earthquake vulnerability of the area, legal requirements especially principles of safety provision of adjacent areas and people, stabilization cost, costs associated with the surface FAILURE or DISPLACEMENT and the difficulties and limitations of implementation. The SOIL NAILING TECHNIQUE which in recent years has been widely used for STABILIZING the exterior faces of excavation sites in large cities of the country includes building a wall by SOIL NAILING and reinforcing it in situ, expanding work as excavation continues by putting passive reinforcing bars that work in tensile conditions. In designing the SOIL NAILING TECHNIQUE, the details of the nail, the concrete facing and the metal bearing plate, surface and underground water drainage and horizontal and vertical DISPLACEMENTs of the nailed wall should be taken into consideration. The SOIL NAILING TECHNIQUE has considerable relative advantage. This is one the most appropriate TECHNIQUEs of STABILIZING the exterior faces of the excavation site for the following reason: the speedy implementation, reasonable cost, easy and speedy compatibility with different site conditions, non-use of heavy machinery, speedy and reliable implementation of humidity insulation and non-interference of the supporting structures with principal construction functions. The limitations of this TECHNIQUE are: entrance into adjacent property, possible lateral and vertical DISPLACEMENTs in the face of the excavation sites and in the adjacent land, and possibility of cracks in the adjacent buildings. Due to specialized nature of this TECHNIQUE and in order to prevent FAILURE of the exterior walls of the excavation sites, it is necessary to rank and approve the qualifications of the performers of the SOIL NAILING TECHNIQUEs in the country.

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APA: Copy

TAGHI ZADEH GHAHI, E.A.. (2008). STABILIZE THE FACES OF DEEP EXCAVATION WITH SOIL NAILING TECHNIQUE IN URBAN AREAS. HONAR-HA-YE-ZIBA, -(35), 51-61. SID. https://sid.ir/paper/5690/en

Vancouver: Copy

TAGHI ZADEH GHAHI E.A.. STABILIZE THE FACES OF DEEP EXCAVATION WITH SOIL NAILING TECHNIQUE IN URBAN AREAS. HONAR-HA-YE-ZIBA[Internet]. 2008;-(35):51-61. Available from: https://sid.ir/paper/5690/en

IEEE: Copy

E.A. TAGHI ZADEH GHAHI, “STABILIZE THE FACES OF DEEP EXCAVATION WITH SOIL NAILING TECHNIQUE IN URBAN AREAS,” HONAR-HA-YE-ZIBA, vol. -, no. 35, pp. 51–61, 2008, [Online]. Available: https://sid.ir/paper/5690/en

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