月別アーカイブ: 2016年9月

Sinorock carry a comprehensive range of various self drilling rock bolts,generally speaking,
we have two categories as below:
1,R25N, R32L, R32N, R32S, R38N,R51N, T76N, T76S, T111N, T111S
2,T30/16,T30/14,T40/16,T40/20,T52/26,T73/53,T73/45,T73/35,T103/78,T103/51
All self drilling rock bolts can be manufactured in different lengths, like 2 meters, 3
meters, 4 meters, 6 meters or 9 meters. Both left hand thread and right hand thread are
available upon customers request.
Besides, we also supply a complete range of accessories, including coupling sleeves, steel
plates, nuts, centralizers, and various anchor bits.
Sinorock has focused on creating self drilling rock bolt products that help people build
safer and stronger homes and buildings.
Considered a leader in rock bolt systems research, testing and innovation, Sinorock® is one
of the largest rock bolts suppliers in the world.
During construction, because of height differences between high-rise buildings, load and
distribution of structural rigidity are uneven, which maybe bring subsidence of different
parts’ foundation, cause inclination of inner structure or cracks, even threaten people’s
living security. So when designing and planning high-rise buildings, questions of foundation
subsidence need to be considered and preventive measures should be discussed to avoid the
emergence of danger.
1. Ensuring the accuracy and integrity of geological data.
Generally speaking, natural stratum has compressibility with different extents, such as rock
mass and soil layer. When received outer force or own gravity, compression will appear and
then phenomenon of subsidence will happen.
Before construction, project’s managers should strengthen supervision of geological
explosion work, make serious analysis to ensure the accuracy and integrity of geological
data. Geological environment should be also mastered well, such as property of soil layer,
distribution of underground water, etc. Also, education and training work should be carried
out for explorers.
2. Choosing self drilling rock bolt with good tensile and yield strength.
During the construction of high-rise buildings, self drilling anchor bolt has good
supporting effect and has played an important role. Under simple tension or compression, the
stress which plastic flow needs will increase with the deformation, that’s tension
strength. After the elastic deformation of self drilling anchor bolt reaching limitation,
its strength will occur fluctuation within a narrow range, then the plastic deformation
begins, that’s yield strength. Actually, tensile and yield strength are functions
determined by deformation speed, deformation temperature and deformation degree, these
functions influence each other and have relevance with property of self drilling anchor
bolt.
Generally speaking, self drilling rock bolt’s anchorage force is determined by stability
analysis, then the amount, form, size and length of self drilling rock bolt will be
confirmed.
3. Designing foundation height and decreasing precipitation processing.
During the foundation construction of high-rise buildings, reasonable foundation height
should be confirmed and precipitation processing should be decreased. Generally, the upper
structure of high-rise buildings is quite stable, to avoid uneven subsidence, the foundation
height should be confirmed reasonably. Researches show that precipitation processing has
certain influence on uneven subsidence, which will also increase the probability of uneven
subsidence.
4. Carrying out quality inspection work of foundation subsidence.
During the design process of high-rise buildings, the interaction between upper structure
and foundation should be analyzed and necessary measures should be adopted to enhance
buildings’ intensity, increase general bearing capacity and avoid deformation. Quality
inspectors should test design parameters, stability and depth of foundation, etc.