Technical specification is the basis for the formulation of the programme
geological Engineering - a special kind of engineering that is performed according to the order. The basis for the engineering studies is a technical task. How to write a job on engineering-geological surveys? It should contain information on the basis of which will be the compiled program works, that is, the technical requirements actually depend on the number of wells and drilling depth.
On the question of how to make the technical project on engineering-geological surveys, there is a specific answer. It must contain the following information:
- that is supposed to build;
- on what foundations;
where it is located.
Program works - a guide to action
in accordance with the technical specifications drawn up research programme. Normative literature quite clearly establishes how to choose the number of wells for engineering-geological surveys. The state building code defines the minimum number of excavations within the footprint of the building under construction, depending on its level of responsibility, regulated and intervals. The level of responsibility indicated in the technical specifications.
Different parts of the building are characterized by different complexity of Geology. The complexity is established based on the combination of geological factors, such as:
- geomorphology (geomorphological);
- development of aquifers and the consistency of their chemical composition;
- the lack or existence of adverse processes;
- the presence in the context of soils with specific properties.
how many layers and the nature of their occurrence;
the homogeneity or heterogeneity of the characteristics;
So when the III level of responsibility of the building in simple terms (I category) is enough in the outline of the building to drill 1-2 elaborate, with the distance between them from 75 to 100 m. With the II level of responsibility in terms of average complexity (category II) drilling operations shall be assigned in the amount of not less than 3 wells, and reduced the distance up to 40-50 meters.
table 3.2 DBN sets how to choose the depth of drilling for engineering-geological investigations. According to the reference information about the load on the Foundation and depth of Foundation base sets the depth of the mine workings. For example, during construction on continuous footings under load on the Foundation 500 kN/m (4-6-storey building), the depth of excavations shall be deeper than the base of the Foundation at 9-12 m. in the presence of strata subsidence of the soil drilling is performed at full power with the grasping of the lower layer.
Thus, the number of wells and drilling depth is not abstract values, which depend on the whim of the performer, and quite specific, due to the complexity of construction and Geology.
Field work and report writing
once a program is approved by the customer, begin the field research. Drilling to provide material for laboratory tests and the construction of geological sections and models. Drilling is carried out by methods that accurately reflect the boundary layers and to take samples.
For field and laboratory supplies by geologists from the company "Guild Engineering" written report containing all necessary design information. Successful passage of the examination is guaranteed, if correctly selected number and depth of wells.