2017年09月26日

Hollow bar micropiles

Using hollow grouting anchor to support the large section permanent chamber, realize the bolting and grouting integration, improve the bearing capacity of anchor cable, and decrease two sides and the deformation amount between roof and floor of roadway, the roof deep separation has been effectively controlled, achieved good supporting effect, and saved the reinforcement support cost, which indicate that the bolting and grouting methods on the basis of hollow grouting anchor to the stability of large cross section chamber has significant effect, it is worthy of popularization and application.
The hollow bar technique have been used in the United States as a self-grouting soil nails which replaces the traditional drill and grout method. The drilling, installation and grouting of nailing in this method is combined into one single step. This method proves to be advantageous for caving ground conditions and was initially employed for temporary shoring applications.

The accessories for hollow core bar soil nails include washers, nuts, bearing plates, couplers and centralizers.The drill rig used on soil nailing projects using hollow core bars has the capacity to adapt to various sizes of hollow core bars and drill bits. Hydraulic rotary or rotary percussion drill rigs are commonly used. The rigs can be tack mounted or excavator mounted .The versatility of drilling rigs and concurrent drilling, installing and grouting procedure of hollow soil nails have worked well for remote access.

Sinorock hollow bar system is the efficient and economical solution to enhance reinforcement for Construction,so believe Sinorock.Choose us!  

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2017年09月22日

Rock reinforcement bar

Deep foundation excavation project is developing towards great depth, large area, high technology and big difficulty. It is usually constructed in dense building group and restricted by place, surrounding buildings, underground pipelines, etc. Safe slope has not enough room, so it is limit for deep foundation’s stabilization and deformation control. Large scale excavation and support system should be designed to ensure construction go on wheels.

Deep foundation excavation is temporary, if support system is not rational, it will probably cause severe consequence. According to different soil texture condition, construction technology, equipment level, choosing rational and economic supporting structural concept is always an important content in researching support problem of deep foundation excavation projects.
Sinorock hollow bar system is used for deep foundation, Sinorock hollow anchor bolt for rock reinforcement is a supporting method with higher efficiency, higher reliability, more obvious supporting effect and more extensive application. It can reinforce surrounding slope and prevent deformation, settlement, deformation and collapse effectively.  

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2017年09月14日

Grouting hollow bar

The self drilling hollow anchor bar is a new type anchor bolt which combines the function of the anchor bar and the grouting pipe. It is full of grouting, but also pressure grouting, to avoid the mortar loose caused by the pulling out of grouting pipe during construction. And because of the role of the accessories, the centered performance of anchor bars are good, which can be wrapped in full length to improve the quality of the project for solving many traditional problems in the anchoring system, which applied to the anti-floating of underground engineering, and it can better solve the other forms of anti-floating anchor rods in the soil, especially in the silt and muddy soil layer drilling easily caused by the collapse and necking problems, with a high promotional value.

In order to solve the problems of steep— inclined limestone,poor self support capability of weak and soft shale and difficulties in the control of the rock mass deformation in the construction of the underground powerplant of Pengshui hydropower station,the new technology of expansion and prestressed type hollow grouting bolt with steel wedge is adopted to reinforce the shallow— covered rock mass.The anchor piers with steel plates,which are used to replace the original concrete anchor piers, can simplify the construction technology,ensure the construction quality and enhance the construction speed.Thus,the wall rocks are deeply and immediately anchored and the deformation risks of the wall rocks are minimized.The comprehensive application of the new anchoring technology ensures the shallow and/or deep anchoring quality in soft and weak shale.In addition,the new technology results in significant economic and social benefits and can be popularized.

Sinorock is recognized for its excellent quality, delivery performance, innovative management and perfect service system. In addition, many products we have developed have become industry standards. The products we are provide all kinds of self drilling hollow bar and the corresponding accessories. Our self drilling hollow anchor bolt products received the consistent high praise by the customers. Till now, Sinorock has become one of the famous self drilling hollow bar suppliers.  

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2017年09月08日

Injection support hollow bar

Foundation pit support is a kind of protective measure for surrounding condition and side wall. It has the effect of reinforce and support. Foundation pit support, as a structural system, should meet demand of stability and anti-deformation.
The Sinorock injection hollow bar has some advantages for foundation pit
1. Low cost.

Compared with traditional supporting technologies, hollow injection anchor effectively decreases input and transport of supporting materials, then reduces materials’ cost.

Because hollow injection anchor penetrates into surrounding rock body, tunnel cross-section doesn’t need to be taken up, at design, it can decrease cross-sectional area, which will save excavation cost.

The stability of hollow injection anchor supporting is good, it can decrease amount of maintenance and then reduce cost of maintenance.

2. Rapid supporting function.

Compared with traditional supporting patterns, hollow injection anchor has small amount of materials and light weight, which can fasten transport speed and improve excavation efficiency.

During excavation, application of hollow injection anchor can reduce workers’ labor intensity, decrease operation procedure and improve working efficiency.

Hollow injection anchor combines drilling, grouting and anchoring together, construction procedure is simple. It can realize rapid surrounding rock support.

3. Good supporting effect.

Through analysis of hollow injection anchor supporting mechanism, hollow injection anchor belongs to active support. Using rock bodies’ self-supporting capacity to form stable structures, which can improve stability of integrity.  

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