Download 
The Slope Support Project of Dong Miao Residential Area in Ji Nan
Time:2015-10-30View:
Engineering Condition
Dong Miao residential area was located in the north side of Lvyou Road in Lixia District, Jinan province. The west of the area is the Jingzhuang Mountains. As the strongly-weathered limestone is the bearing directly basic layer, the geographic conditions is more complex. The landscape is hill and the total building area is about 37526㎡.
The mountain has been cut and divided into west slope and east slope because of the engineering construction. The two slopes threaten badly to the project. The slope is mainly composed of a lot of construction wastes and a certain amount of household garbage, which was piled by the people around and remote city. Therefore, the homogeneity of the slope is extremely bad and the slope is even in a loose condition after long-time scour during the rainy season.
The Feature of Construction Method
The traditional deep excavation retaining method can not meet the requirement of the stabilization of large-scale underground buildings. Especially in sandy cobble stratum where the ratio of finishing gas hole is very low, it must lead to high pressure for the grouting and anchoring later and increase the construction cost.
The technique of self drilling anchor bolt, which is introduced from foreign countries, is a new kind of rock-soil anchoring technique to apply for the projects in complicated geological conditions and construction environment especially in the weak soil and sandy cobble stratum.
Engineering Design
This project adopts joint support method including cutting slope & reducing load, self drilling anchor bolt, barricade downhill, and concrete grille. The gradient of the slope is 1:0.8, the angel 50°and unloading earthwork quantity 5500 cubic meters. The vertical height of self drilling anchor bolt is 3 meters, the length between 16~20 meters and the distance on the surface of slope is 4 meters. They are arranged as a plum, and the dip angle is 15°. The total footage of the self drilling anchor bolt is 7320 meters. One thing should be noticed is that the bolts must be installed in the nodal point of the grille in order to be connected with each other as a whole.
| Project | Unit | Quantity | Notes |
| Self Drilling Anchor Bolt | M | 7320 | |
| Concrete | M³ | 610 | |
| Retaining walls | M³ | 660 | |
| earth excavation | M³ | 5500 |
latest cases
-
- Pre-support with Pipe Umbrella System for Gaojiaping Tunnel
- Time:2022-08-04From:This Site
- Project Background Zhengzhou-Wanzhou high-speed railway has a construction length of 818 kilometers, an estimated total investment of CNY 118 billion, and a des
- View details
-
- The Construction Method of Self Drilling Anchor Bolt in Sandy Gravel Deep Excavation
- Time:2015-10-22From:This Site
- With the exploitation of the underground space in cities and the large scale construction of the underground retail spaces, the deep excavation projects is becoming more and more.
- View details
-
- The Application of Self Drilling Anchor Bolt at the Tala Hydro Project for Tunneling in Poor Rock Mass Conditions
- Time:2015-08-20From:This Site
- The Tala hydroelectric project is located in Chukha Dzongkhag in western Bhutan. The dam site is in the Thimphu gneiss, and the section of HRT up to 14km downstream from C-1 is in gneiss with quartzite bands and biotite schists. There are joint sets, and the rock is highly faulted, with foliation shears of varying thickness up to 30cm. From 14km to 23km, the rock type is biotite gneiss with bands of quartzite, mica schist, and sericite-schist with amphibolite. Rock conditions merit 3 - 4 on the NGI Q system, with pretty poor conditions affecting parts of C2, C-3 and all of C-4. The rock format
- View details
-
.jpg)
- Xingyi Normal University for Nationalities Retaining Wall Reinforcement
- Time:2022-07-15From:This Site
- Project Background The project is located in Xingyi Normal University for Nationalities, Dingxiao Town, Xingyi City. It consists of two slopes, the upper part i
- View details
-
- Binjiang West Road Pedestrian Mall Project
- Time:2022-07-15From:This Site
- The project requires a shorter construction period and lower cost. After multiple rounds of plan review, the project party finally decided to adopt a self-drilling anchor system, using simultaneous drilling and grouting construction processes.
- View details
-
- The Application of Self Drilling Anchor Bolt in Beijing Oriental Plaza Foundation Support Project
- Time:2015-08-20From:This Site
- In recent years, the self drilling anchor bolt plays a more and more important role in the foundation support projects. The unconsolidated ground condition favors it for fast and simple method of installation compared to the traditional method. It has many good features just as follows:
- View details
-
- The Slope Support Project of Dong Miao Residential Area in Ji Nan
- Time:2015-10-30From:This Site
- The traditional deep excavation retaining method can not meet the requirement of the stabilization of large-scale underground buildings. Especially in sandy cobble stratum where the ratio of finishing gas hole is very low, it must lead to high pressure for the grouting and anchoring later and increase the construction cost.
- View details
-
- Application of Self-drilling Anchor Bolts in Vertical Shaft at Left Bank of Xiluodu Hydropower Station
- Time:2015-08-20From:This Site
- Self drilling anchor bolt has two performances: drilling and grouting. It features a hollow bore for flushing, or simultaneous drilling and grouting. It can be installed in sites with weak rocks, loose soil, weathered layer, sand with stone layer where it is so difficult to create a hole in complex formation. The unconsolidated ground conditions favor the self drilling anchor bolt technique for fast and simple method of installed compared to the traditional method, which was confirmed by the application in Vertical Shaft at Left Bank of Xiluodu Hydropower Station.
- View details
