IfcImprovedGroundTypeEnum

Item	SPF	XML	Change	Description
IFC4X3_ADD2 to IFC4X4_draft
IfcImprovedGroundTypeEnum			ADDED

Semantic definitions at the type

Type definition

This enumeration defines the different predefined types (methods) for ground improvement that can specify an IfcImprovedGround.

Enumeration definition

Constant	Description
SURCHARGEPRELOADED	A method that applies load to the foundation to discharge pore water, and the foundation is consolidated to improve the foundation strength. Unloading when the carrying capacity reaches the required level.
VERTICALLYDRAINED	A method to set vertical drainage measures in the foundation, so that pore water in the soil is discharged and the foundation strength is improved.
DYNAMICALLYCOMPACTED	The method of using dynamic tamping machine usually free falling a heavy hammer from the height, compacting the soil and quickly improving the bearing capacity of the foundation.
REPLACED	Dig out the soft soil in a certain range below the foundation ground and then backfill the area with high strength, low compressibility and no corrosive materials.
ROLLERCOMPACTED	A kind of compacting method that adopts rolling machinery, repeated rolling and vibration compacts the foundation soil, increasing strength and descreasing compressibility.
INJECTIONGROUTED	A method of injecting curable slurry into cracks or pores of a geotechnical foundation to improve its physical and mechanical properties.
JETGROUTED	A method of ground reinforcement that unlike classical forms of grouting that permeate through the soil uses high kinetic energy in the form of a high velocity jet of grout to breakdown the soil structure and simultaneously mix and replace cement grout with the in-situ soil.
DEEPMIXED	A ground improvement technique that improves soft, high moisture clays, peats, and other weak soils, by mechanically mixing them with dry cementitious binder.
LATERALLYDRAINED	A method to set lateral drainage measures in the foundation, so that pore water in the ground is discharged and the foundation strength is improved.
FROZEN	Artificial ground freezing is used for waterproofing and/or temporary consolidation to support the excavation of underground structures under water in loose soils or in jointed rocks. It is suitable for any type of soil and fractured rock. Most used technologies are either direct method (liquid nitrogen) or indirect method (brine).
DEWATERED	A kind of ground improvement method where water is removed to lower water pressure in the ground by active dewatering of the ground by pumping.
USERDEFINED	User-defined type.
NOTDEFINED	Undefined type.

Formal representations

XML Specification

 <xs:simpleType name="IfcImprovedGroundTypeEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="surchargepreloaded"/>

   <xs:enumeration value="verticallydrained"/>

   <xs:enumeration value="dynamicallycompacted"/>

   <xs:enumeration value="replaced"/>

   <xs:enumeration value="rollercompacted"/>

   <xs:enumeration value="injectiongrouted"/>

   <xs:enumeration value="jetgrouted"/>

   <xs:enumeration value="deepmixed"/>

   <xs:enumeration value="laterallydrained"/>

   <xs:enumeration value="frozen"/>

   <xs:enumeration value="dewatered"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcImprovedGroundTypeEnum = ENUMERATION OF (

 SURCHARGEPRELOADED, 
 VERTICALLYDRAINED, 
 DYNAMICALLYCOMPACTED, 
 REPLACED, 
 ROLLERCOMPACTED, 
 INJECTIONGROUTED, 
 JETGROUTED, 
 DEEPMIXED, 
 LATERALLYDRAINED, 
 FROZEN, 
 DEWATERED, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram