SDA bolt is mainly used in the fault fracture zone advanced support construction

SDA bolt is mainly used in the fault fracture zone advanced support construction.

Organizzazioni Schweizer Depeschen Agentur
Argomenti sport, giornalismo

09/gen/2016 09.54.40 sinorockzqq Contatta l'autore

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 With the exploitation of the underground space in cities and the  
 large scale construction of the underground retail spaces, the deep 
  excavation projects is becoming more and more. The traditional deep 
  excavation retaining method can not meet the requirement of the  
stabilization of large-scale underground buildings. Especially in
 sandy cobble stratum where the ratio of finishing gas hole is very 
  low, it must lead to high pressure for the grouting and anchoring  
 later and increase the construction cost.
The technique of SDA bolt,which is introduced from foreign countries,
  is a new kind of rock-soil anchoring technique to apply for the  
projects in complicated geological conditions and construction
 environment especially in the weak soil and sandy cobble stratum.
Since SDA bolt is mainly used in the fault fracture zone advanced
 support construction, under the complex geological conditions 
  instead of ordinary catheter, overcoming the problems such as hole  
 collapse, unable to plug rod, grouting is not full,ect. which played  
 a supporting role in advance, ensuring the overall stability of the  
 surrounding rock, and the safety of construction personnel and tunnel, 
  with good application value. 
 http://www.neighbour123.com/blog/show/sinorock-s-friction-bolt-improves-rock-stability 
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