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and not merely a sad Appendix dawn.
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The love makes us similar.

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Life is full of signals;

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invisible signals.

receiving signals

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implausible signals,

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hidden signals

and circular signals.

Signs point you

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signals that do not have

signals to be

and signs that do not return

signs, signals where you are going?

impeccable Signs

imperfect signals

untouchable signals

indifferent signals

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hate you

and those you love.

signs demanding

nonbelievers signals

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and permanent signs

Countless signs!,

And those signs are coincidences

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Close your eyes and dream. Dream you're someone else,

nobody touches you, that nothing oppresses you, it all combines

you and your thoughts are so beautiful that

you become .. ...... So, without further.

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Seminars SEMSIG AETESS-on "Actions in geotechnical works harbor"

INTRODUCTION

This session on "Actions in geotechnical Port Works" presented met 10-year series of seminars organized jointly with the Society of Mechanics and Engineering Geotechnical Suelo (SEMSIG) il'Asociación of Firms and technology Suelo Subsuelo (AEtESS). During this time more than 4,000 professionals interested in various techniques related to engineering field have participated in this joint project.
As before, we continue with our goal of promoting a forum discussion in which we can discuss the most important aspects of design, implementation and monitoring of our work. To carry it out, as usual, we provided two round tables: the first devoted to aspects of "DissenyiControl" and the second to the "execution" of special works. Both will be introduced by a series of presentations by experts and renowned professionals in the field of geotechnical and serve as a basis for subsequent discussions on various aspects of the techniques considered and their regulations.
hope this 10th day in order to continue serving both companies to promote improving our industry through these technical meetings, and for this reason that we would continue to count on your participation.

More information on the following pages:

http://www.etcg.upc.edu/esdeveniments/jornades-tecniques-semsig-aetess-sobre -geotechnical-actions-on-the-works-port

http://www.aetess.com/detalle-jornadas-y-congresos.php?idJornada=3

http://www.johnny-villavicencio-garcia.blogspot.com

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Vertical Shaft Sinking Machines (VSM-007)

Machines Vertical Shaft Sinking (VSM-007)

Johnny Villavicencio García

Masters in Geotechnical Engineering and Earthquake Engineering

Civil Engineering and Ports (UPC)

October 2010 - Barcelona, \u200b\u200bSpain

Summary

discuss some of my experiences as responsible for the mechanical excavation of the ventilation shaft with the VSM-007 machine (Vertical Shaft Sinking Machines). In the proposed joint venture S-444 Node-Montcada i Reixac Trinidad; Project LAV (Barcelona-Frontera France)

Key words: Shaft sinking machine

1.-Introduction

As we know process technology in mechanized excavation of tunnels and ancillary equipment have rapidly advanced, the methods used in the construction of ventilation shafts or drainage systems in tunnels or in large urban areas today remain relatively conventional.

The main reason for the low level of mechanization is the necessary flexibility in relation to:

· Diameter or cross section

· Depth

· Geology

· The presence of groundwater

· covering construction

describing this method of digging is called ( Pipe jacking method ) and in particular is still showing that it can generally be used in accordance with the project plan, ie the deadline and financially competitive with traditional methods.

;

2 .- Mechanization and innovation in the construction of wells

An innovative development of Herrenknecht for all sorts of excavation Wells is the VSM (Vertical Shaft Sinking Machines), consists mainly of a sink unit and excavation unit and can be used in stable and unstable soils. Because groundwater is so costly excavation below water level, hence a machine concept has been developed which also works well below the water table and reduce costs.

3 .- Description of the process .-

The cutting process works similarly to a partial front digging machine. The rotating drum, which is equipped with special cutting tools are in the telescopic arm and pull the geology, making swinging in the bottom of the well.

The excavated material is removed hydraulically through pipelines to the separation plant on the surface. During the operation the drilling machine has steel cables connected to the sink unit found on the surface. This means that the machine may be under constant surveillance. A variety of different options are available well casing, depending on geology.

control units and the provision establishing an independent level and remain on the surface. And the provision of electricity and hydraulics, This means that the machine operator is always able to verify the technical parameters of the machine while you're Digging and can change them if necessary to adapt the drilling machine environmental and geological conditions make the optimum settings of the machine.

4.- geotechnical and construction aspects to consider

· Design segments and criteria tailored to local geology and construction methodology and transporting them.

· global stability and calculation of the cap background.

From a global perspective, the cap is dimensioned to withstand the vertical thrust of the water column decompensated

· ring friction with the ground in the backfill and filling technique with mortar Gap (Methodology constructively to ensure the backfill friction and to prevent the lifting of the background).

In the process of emptying the pit has to be slow, obviously the gap or over excavation and backfill will be filled with grout and the concrete bottom plug, both elements grout gap and bottom plug must have adequate structural strength (depth control in the process of construction).

Taking into account that one of the most sensitive is the transmission cap and push the water toward the segments of the well, which are the final resist the weight and friction of the drive (make checks plug-Bond keystone)

· geotechnical modeling in deep excavation in deformable soils and iteration control of movements of geotechnical instrumentation during excavation.

· Surveys and drilling to evaluate the material and design characteristics of the cutting drum depending on local geology considering aggressiveness of the environment, possible scuffs, etc. strata orientation.

· Calibration of the main machine parameters to geology (drum speed, pump flow, Torque drum, hydraulic pressures) during excavation to optimize production processes.

· logistics and supply aspects. (previous work, machine assembly, production, removal)

· Anticipate sealing techniques to spot leak through the joints in the rings (Resin Injection)

· Plant material separation and recycling of water has to be perfectly suited to the capacity to pump sludge remover

· Provide environmental aspects when final extraction well water.

5 .- Conclusions

· Technical and financial support traditional methods of excavation on the diameter, optimizing time and space in urban environments where access to civil works is limited and conditioned by the environment.

· You can reach excellent performance depending on factors such as geology, working groups and shifts.

· Low-construction affected the environment in safety and minimize workplace hazards.

6 .- References

http://www.herrenknecht.com/services-en/underground-technology-services.html

http://www.nodig-bau.de/praxisberichte/PR_tis_12-2004. pdf

Johnny Villavicencio García johnny_jvg007@yahoo.com.ar

http://www.visualcv.com/mguf4u9