2017年06月26日

Soil nail

Soil nailing is been used in geotechnical engineering to stabilise existing slopes or excavations where top-to-bottom construction is advantageous compared to other retaining wall system. It is an in-situ reinforcement method used to reinforce and strengthen ground by installing steel bars called as soil nails .
In general, the economical use of soil nailing requires, the ground has to be stand unsupported in a vertical or steeply – sloped cut of 1 to 2 m in height for one to two days.

In addition, it is highly desirable that an open drill hole can maintain its stability for at least several hours neither the execution of the work would be more challenging.

Geologically the best suited conditions for soil nailing would be characterized as the stiff to hard fine-grained soils which include stiff to hard clays, clayey silts, silty clays, sandy clays, and sandy silts are preferred soils.

Sand, gravels, cobbles, pebbles and boulder, which are dense to very dense soils with some apparent cohesion also work well for soil nailing.

Weathered rocks is also favorable for soil nailing while it would be weathered throughout and there should not be the weak planes.

The soil which has been deposited by glacial event is also favorable for soil nailing.  
Posted by soilnailsystems at 18:28Comments(0)TrackBack(0)

2017年06月09日

Stainless steel soil nails

With the development of social economy, more and more geotechnical engineering structure will be built, as one of the important supporting measures in the engineering construction of reinforcement technology of soil nailing system is going to be a long-term development prospects.
Soil nailing system as an effective means of anchorage,was widely used in tunnel pre-support,radial support,reinforcement,as well as tunnel disease treatment works.And the use of soil nailing system has made a lot of good economic and social benefits.
Continued investments in Research & Development and the resulting patent applications sustainably strengthen the know-how available within the Sinorock Group. By offering innovative solutions in accordance with superior quality standards,Sinorock fulfills the constantly changing requirements of its target markets.
It may comprehensively command the quality in general operational production, and may save several percentage of cost in every process so as to realize the low-cost strategy with low-price sales, rapidly supply to world big factories and establish international customer relationship and strategic alliance with world big factories under new mode, upon which will ensure Sinorock’s authorized advantages for cold forging and maintain its position of the biggest supplier in the world for Stainless steel soil nails and self drilling soil nails.
As a responsible bolt manufacturer Sinorock manufactures a broad range of extremely reliable, precise and accurate soil nails of different sizes from high quality graded raw material. At the same time we can facilitate customers by our ready stock, for anchor nuts, drill bit,etc.Doing this in the anchoring most cost effective way possible.We have enough ability to meet your demand.
  
Posted by soilnailsystems at 16:51Comments(0)TrackBack(0)

2017年05月17日

Useful soil nailing support

Soil nailing support combines drilling, grouting and anchoring together, without casing pipe and only one person can operate it, which is secure, high-efficient and energy-saving. Overall thread on surface ensures enough bonding stress and long supporting time.
Based on this dam construction environment needing grouting and anchoring , it can be used soil nailing to stabilize the foundation effectively, which can be applied to kinds of environment, can ensure continuously steady construction, can be high degree of mechanization, low noise and less dust, can reduce the labor intensity of workers, and can be conducive to their health and safety.
Self drilling soil nail anchor is regarded as a common product for hydro projects. Sinorock manufacturers both R-thread and T-thread systems, including R25, R32, R38, R51, T30, T40, T52, T73, T76, T103, T111, T127 and T130 sizes. We has been always providing the safe, efficient, energy-saving and environmental friendly products and services for clients. Nowadays Sinorock hollow soil nail systems have been used in numerous famous hydropower plants at home and abroad.  
Posted by soilnailsystems at 17:54Comments(0)TrackBack(0)

2017年05月08日

Soil nail in soil

The swelling pressure induced lateral stress and deformation in soil, the maximum nail load, and the nail head load of a soil nail wall constructed in high plasticity expansive soil are determined using finite element model. Soil samples were collected from the construction site and were subjected to various laboratory testing to measure the soil parameters related to volume change due to change in soil suction and to establish the soil water characteristic curve for the soil. The moisture content profile of the construction site was monitored for two years and a wetting envelope was developed to represent the maximum change in moisture content due to seasonal fluctuation. A finite element model is developed to simulate the soil nail wall in high plasticity expansive soil, which shows that the lateral stress and deformation in soil, the maximum nail load, and the nail head load of a soil nail wall increases significantly due to seasonal fluctuation of the moisture content.   
Posted by soilnailsystems at 19:06Comments(0)TrackBack(0)

2017年04月17日

Powerful soil nails

Oversized holes of 100mm to 200mm in diameter are drilled and the centralized self drilling soil nail component is placed. The drill hole is then tremie grouted with cement grout. After the drill hole grout is cured, the soil nails may be torque tensioned against the protective shotcrete face to a slight load if desired.
It is well known that rock is relatively strong in compression and weak in tensile, shear and flexural strengths and often requires reinforcing. Further to this, excavated rock and coal surfaces often deteriorate on exposure. Bolting overlapping zones can safely and securely contain rock and coal within the vicinity of the bolts.
The effective anchorage and bonding to the rock by the soil nails is achieved by grouting. Thus the selection of the right grout is of paramount importance.
Sinorock places their clients in control of their soil stabilization and ground engineering needs. Our innovative techniques and engineered solutions save our clients thousands of dollars by minimizing down time and disruptions by using unique technologies for specialized solutions.So Sinorock makes the difference by making innovations in manufacturing self drilling soil nailing system.
At Sinorock, we are an experienced distributor of many types of self drilling soil nails and other important products. With an expansive range covering over a dozen product categories, we have made ourselves into a convenient, single-point source for these important products.
At the same time,Sinorock is the safeguard of construction.Sinorock has implemented a quality management system which has been registered to the ISO 9001:2008 standard and works to continually improve its effectiveness.Our most important goal is to meet our customers requirements and expectations. We are fully compliant to the self drilling soil nail.  
Posted by soilnailsystems at 18:19Comments(0)TrackBack(0)

2017年04月10日

Soil nail supporting structure

Soil nailing structure is a new retaining structure for soil excavation and slope stabilization since the 1970s. It combines soil mass, soil nail body and concrete front-panel. Through installing soil nail with certain length and density in soil mass, soil nail forms compound soil body based on cohesive force and frictional resistance. Under the circumstance of soil deformation, soil nail accepts passive stress and then reinforce the soil mass by the tension effect. This will not only enhance the stiffness of entire soil body, but also remedy the weakness of soil body: shear-resistance and low-extension strength. Then, the supporting structure with active restriction mechanism is formed, which will enhance the entire stability and improve soil body’s plastic deformation and failure property.
Soil nail has the functions of convenient, reliable and economical. At the same time, during soil nail construction, the influence for surrounding environment is little. So, soil nail supporting is widely used in foundation excavation project.
Facing with so many difficulties and challenges among excavation and support slope, supporting operation of soil nail has played an important role on the safety of construction.
There are several problems need to be considered during the construction:
1. Before installing soil nail, there are loose rocks falling down when cleaning. So workers shouldn’t operate under this area.
2.When working on muck bank or frame, safety should be noticed.
3.Workers should operate with each other. Temporary supporting shouldn’t be canceled before linking steel frame and soil nail.
4.When deformation or crack appearing during the process of drilling and grouting, efficient remedial measures should be adopted according to conditions and workers should leave danger areas immediately.
5.When mortar grouting into soil nail, pressure gauge should be checked closely. If the indication is too high, special measures should be adopted and ignoring blocking. In addition, nozzle of grouting pipe should not point to people.
6.Workers should operate according to the operation procedure strictly, ignoring the occurrence of security accident.
  
Posted by soilnailsystems at 17:13Comments(0)TrackBack(0)

2017年04月02日

Best soil nail system



Soil nailing is an economical technique for constructing retaining walls from the top down as well as stabilizing slopes. When applying the soil nailing process relatively small, closely spaced steel tendons are drilled and grouted into the soil. The soil nails significantly increase the apparent cohesion of the soil through their ability to carry tensile loads. A construction facing is also usually required, and is typically shotcrete reinforced by welded wire mesh. A shotcrete facing is typically applied, although more astatically pleasing options such as precast panels, cast-in-place concrete or revegetation are available for permanent structures. Typical applications of soil nailing are in the construction of new slopes in cuttings and remedial works for unstable slopes. Soil nailing can be used in any natural ground.
Soil nailing system is possible in a wide range of materials including: clays sandy soils, weathered rock, tallus slope deposits, heterogeneous and stratified soils. Soil nailing can be seen as unpractical under the following conditions: soft, plastic clays, organics/peat, loose, low density and/or saturated soils and fills (rubble, cinder, ash, etc.). Soil Nailing Drainage Systems are also a key consideration in design. Drainage systems are integrated into the nailed wall, minimizing liquid pressure and preventing erosion of the reinforced ground.

Soil nailing is used primarily for excavation support or slope stabilization. This process involves the installation of closely spaced soil nails drilled near horizontal and the application of a facing material such as reinforced shotcrete or structural mesh. The soil nails themselves tend to be small in diameter, typically 4″ to 6″, and consist of a center reinforcing bar surrounded by grout. Soil nail spacing usually ranges from 4′ to 6′ on center vertically and horizontally with the top row of soil nails generally being placed in the upper two feet of the excavation or slope.
From a design standpoint, soil nailing is a passive system attempting to place enough anchorage into the adjacent soil so it acts as a “reinforced block” to resist overturning. The load demand on each nail tends to be fairly low as they are intended to act as a group. In the case of excavation support, the facing is usually designed to take little load but more so tie the system together. In the case of slope stabilization, the facing may be designed to take more load and the nails may be post tensioned.  
Posted by soilnailsystems at 16:24Comments(0)TrackBack(0)

2017年03月13日

Drill Hollow Bar Micropiles

Micropiles , sometime also called root piles or mini piles, are a kind of speciality piles. They are

normally used for underpinning, including high speed railway, bridge building and so on.

The diameter of a micropile is 60 to 200 mm. The diameter is small in comparison with normal piles.
Thus Micropiles systems are allowed in almost any ground condition with equipment smaller than those used for traditional piles.

In general, Micropiles includes the reinforcement, hex nuts, steel casing, steel bearing plates and centralizer.

For Solid Bar Micropiles:

The predrilling is required.
The micropile system is limited to shallow rock, and very stiff throughout soil strata.
Casing is needed in soft soils.
Pre / Post Grouting.
Numbers of equipments.


In contrast, the Drill Hollow Bar Micropiles are more efficient and labor saving in strata

reinforcements:

No need of predrilling, high installation rate.
Self Drilling Hollow Bar Micropiles is available in difficult soil conditions.
No casing required, reduced material cost.
Only need drilling and grout injection.


Learn more about Hollow Bar Micropiles & Accessories at http://www.soil-nailing.com/.

- See more at: http://www.soil-nailing.com/download/  
Posted by soilnailsystems at 15:00Comments(0)TrackBack(0)

2017年01月23日

Soil nail wall for civil

Soil nail walls may not be appropriate for applications where very strict deformation control is
required for structures and utilities
located behind the proposed wall, as the system requires some soil deformation to mobilize resistance. Deflections can be reduced by post tensioning but at an increased cost.
Existing utilities may place restrictions on the location, inclination, and length of soil nails.
Soil nail walls are not well-suited where large amounts of groundwater seeps into the excavation because of the requirement to maintain a temporary unsupported excavation face.
Permanent soil nail walls require permanent, underground easements.
Construction of soil nail walls requires specialized and experienced contractors.
Sinorock® soil nailing system Spiles enable drilled installation, reducing localised disruption and
providing a conduit for grouting. Subsequent grouting assists in the consolidation of the surrounding ground.

Sinorock has long been recognized as a pioneer in the civil engineering and construction industries for developing alternative solutions for conventional structural applications. Our soil nails can be easily and quickly driven with conventional construction tools, little soil disturbance and is considered a low impact solution.

If you are a user of self drilling soil nail, our products are sure to interest you. We are setting new industry benchmarks in the production of self drilling soil nails. Sinorock produces self drilling soil nails to the tightest tollerances & the highest quality standards in the industry. This means, as a customer you get more length (meters) and therefore more finished product per tonne of self drilling soil nails that you purchase. This also means our products cost less to machine than our competitors.  
Posted by soilnailsystems at 17:24Comments(0)TrackBack(0)