2017年07月25日

Anchor bar supporting

Self drilling anchor bar is a new supporting method under new situation, it adopts special working technology to combine drilling, grouting and anchoring together. All working procedure can be done in one process, so construction is time-saving, energy-saving and high-efficient. It belongs to active support during the whole construction. Recent years, with increase of power demand, hydroelectric station is constructed more and more.
Self drilling anchor in hydroelectric station mainly reflects on dam foundation, diversion tunnel and slope reinforcement. So, it has great influence on hydroelectric station.

Self drilling anchor support can take full advantage of soil body’s self-bearing capacity. Compared to shotcrete support, it has characters of safety, high efficiency and convenience. It can be operated at small spaces, so under allowable condition, adopting self drilling anchor can enhance efficiency largely.

1. Applicability.

Generally speaking, self drilling anchor is suitable for foundation pit support or slope reinforcement with artificial soil, clayey soil and weak cement sandy soil above underground water or after artificial precipitation.

2. Engineering investigation.

Engineering investigation is an essential work for ensuring project’s safety and reliability. As for self drilling anchor project, two points should be noticed specially: underground pipelines and underground water. Distribution of underground pipelines and underground water should be listed in investigation report in order to do design work in advance.

3. Design and monitor problems.

Based on soil condition, soil deformation and stressed condition of self drilling anchor, distance and length of self drilling anchor should be adjusted.

Correct and reasonable design is the precondition for ensuring construction quality, which directly influences engineering safety, duration and economic investment.

Monitoring work mainly includes horizontal deformation, settlement, stress force of self drilling anchor and soil pressure. They can be chosen according to practical situation.  

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2017年07月13日

Reinforcement hollow bar

Hollow bar anchor has the effect of binding, combining and reinforcing surrounding rocks. It helps to improve rocks’ self-intensity and self-stability, lighten self-gravity, and ensure safety and stability of projects. So most countries in the world have began to use this kind of technology.
The hollow bar system are an efficient, economical, and simple solution to enhance reinforcement for mining,tunneling,hydroelectic and civil construction.
Sinorock gains high reputation from customers home and abroad by the implementation of the business philosophy of customer orientation.Sinorock pays great attention to quality improvement of products and promote development of Chinese bolt industry, and gained a lot of rewards from competent national authorities.
Our hollow anchor bar system for Slope stabilization of excavations for road and railway construction, tunnel portals.
It is a technique used to reinforce and strengthen existing ground conditions of slopes and battered cuttings, and offers a rapid and economical alternative to the traditional methods.
Foundations Reinforcement.
It is used for increasing of foundation capacity or settlement control on existing structures.  

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2017年07月07日

Self drilling anchor support

Self drilling anchor support can take full advantage of soil body’s self-bearing capacity. Compared to shotcrete support, it has characters of safety, high efficiency and convenience. It can be
operated at small spaces, so under allowable condition, adopting self drilling anchor can enhance efficiency largely.

Sinorock self drilling anchor can be used as the micropiles,here some advantages of self drilling anchor as micropile:
1. High work efficiency
Self drilling anchor system is usually used as a micropile. The hollow anchor bar can be regarded as a disposable drill rod, grouting pipe and reinforcement bar, so it can realize drilling, installation and grouting in one step. Without casing and grouting pipe, self drilling anchor can drill and grout directly. The operation steps will be less, the work efficiency will be higher, and the workload will be reduced.

2. Good anchoring effect
The friction between the micropile and the soil is high. The slurry can cover all the cracks around the drill hole, which can reach a good corrosion protection effect.

3. Strong adaptability
The full length of threaded hollow anchor bar can be cut arbitrarily. Self drilling anchor is suitable for small lightweight drilling equipment. It also can be used in remote areas or limited space where large equipment can not reach, such as steep slope, wet land, dock foundation, basement, overpass, etc.

4. Environmental protection
(1) Rotary percussion drilling causes low noise and small vibration.
(2) Both of self drilling anchor bolt and cement are environmentally friendly materials, without pollution to the soil.
(3) The drilling process has a lower pressure erosion effect on the surrounding environment, without damage to the nearby buildings.  

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