Company Profile

Congratulations to your company for being selected as the 2020 Gold Supplier of China Railway Construction Heavy Industry Group Co., Ltd through the evaluation of the comprehensive capabilities of more than 1,000 registered qualified suppliers. Here, we thank you for your great help along the way, and thank you for your continued trust and support!

According to the comparison of No. 36 Simba H1354 trolley using different brands of drill rods and drill button bits, Litian drill rods have a longer service life, and Litian drills have better drilling speeds, better slag removal effects, and long service life. In particular, the service life of the drill bit with 14 buttons is greatly improved compared to other brands.

Litian rock tools have been used in our project with remarkable results, and the cost performance is better than other brand rock tool quality. Litan provided rock tool maintenance work and provide professional technical services and technical guidance for our project.

Geological conditions: It is an uneven stratum with the upper part soft and the lower part hard. The upper part of the interval is hard plastic cohesive soil and residual soil, and the lower part is fully and strongly weathered granite. The lithology of the tunnel section is quite different. There are generally 60m long bedrock protrusions in the interval, and the bottom protrusions are medium and lightly weathered granite, which intrude into the tunnel 0.5m-1.1m. The uniaxial compressive strength of the slightly weathered granite rock is as high as 120Mpa. The rock is very hard and extremely difficult to break.

The TBM cutters replacement and maintenance service team dispatched by your company has devoted a lot of energy to our service since it came to our project, and went all out to overcome on-site difficulties, saving precious tunneling time for the project department. At the same time, it also demonstrates your company's fine traditions, excellent technology, and perseverance entrepreneurial spirit. For this, our project department would like to express our gratitude to your company.

In this use, Litian shank has reached the service life of the imported high-quality shank adapters, and the service life of Litian drill rods is also equivalent to that of imported high-quality drill rods. In the high-intensity operation, it shows excellent comprehensive cost performance, which is ahead of other similar products.

In the second phase of Chongqing Rail Transit Line 9, the total length from the right line of the TBM section is 1962 meters. Litian TBM roller cutters have been tunneled for 1746 meters in this project. The tunneling thrust is usually 8000KN and the maximum thrust is 12000KN. The TBM cutters' performance is excellent during use, and the cutting tools are not replaced. There are no abnormal damages such as partial wear and disc cutter ring breakage, and the average wear is 1-3mm.

The whole dress of Litian TBM cutters was digging 1215 meters in the bid section (Huilong-Longma section), and there was no abnormal damage such as eccentric wear or cutter ring breakage during use, and the average wear was 2-4mm. Due to the relatively small wear of the TBM cutters in this section, the cutters can be used in the next section of the 1300-meter.

Litian drill rods are very wear-resistant, hard and tough, and the bolts are not easy to break in bolting.

The whole dress of Litian TBM cutting tools was boring more than 870 meters in the bid section, and there was no abnormal damage such as partial wear and breakage of the cutter ring during use. In particular, the disc cutter rings exhibit superior wear resistance and toughness in the typical cobblestone formation in Chengdu. Litian TBM cutters have good quality and stable performance.

In this use, Litian drill rods have reached the service life of the imported high-quality drill rods used in the past, which are equivalent to imported ones and are cost-effective.

Litian TBM cutters have been used in our project and have been tunneled for 1,840 meters. Only two single-edged hobs have been replaced. The wear value of the cutter rings is relatively small. It is expected that after the end of the two kilometers, some of the disc cutters can still be used with grease, seals, and bearings. Litian provides comprehensive technical support during the supply period, and the service personnel tracks it in place.

Geological description: limestone schistosized tuff, tuff breccia partially intercalated with quartz porphyry and other strata.

Litian rock tools manufacturer provides disc cutters supply and on-site service for the TBM tunneling construction of our project. The total excavation length of the project is about 5km. During the excavation, the TBM cutters are less abnormally damaged and the number of cutter changes is few. This improves the construction efficiency of the project. The daily maximum footage is 14 loops and 21 meters, and the monthly maximum footage is 436 meters. Litian TBM cutting tools and accessories have stable quality and long life. Their on-site service level is excellent, and on-site management is strict and standardized. While improving the construction progress, they reduce the cost of cutting tool consumption and fully meet the construction requirements of our project.

Litian drill rods and drill bits are of reliable quality and superior performance. They exhibit excellent comprehensive cost performance in high-strength operations, leading other similar products. Well-known imported drill rods have been bent in the past, causing sticking, and Litian drill rods have no such problem.

Litian TBM disc roller cutters have been boring 4.2 kilometers in our project, and the cutters are used well, and no large-area eccentric wear has been found.

Geological description: gray-green tuff with tuff breccia (containing quartz).