Application of self drilling anchor bolt in deep foundation pit
In recent years, a large number of deep foundation pit had been constructed in the city, poor urban drainage system caused the roads water- logging, if deep foundation pit position low-lying, weak blocking drainage measures may lead to adverse water flow backward, which bring about foundation pit soaked by water immersion, to the foundation pit slope itself and the surrounding environment bring great safety hidden trouble, and even landslides and building damage accident. Heavy rains led to a deep foundation pit are soaked and some slopes were collapsed and the foundations of surrounding buildings were sunken. The causes of the accident are analyzed after emergency rescue. The main reason is foundation pit lateral groundwater with high water pressure, carrying a large number of soil particles of slope to foundation pit, and led to a collapse of the upper soil.
Then the foundation pit reinforcement schemes are designed, which are active area of soil grouting reinforcement and self-drilling bolt added. Grouting can be filled dense with soil that damaged by rain, improve soil shear strength, increase the bearing capacity of self drilling anchor bolt, thereby increasing the safety factor of foundation pit. Since the sealing curtain damaged, grouting in the pit top of slope will help repair sealing curtain and to prevent buildings around foundation pit generating uneven settlement. Using the grouting technology, the foundation pit is successfully completed and can provide technical references for similar projects.
Anchor bolts are often used to transfer load in concrete structures. They are used on variety of structures, including large structures such as dams, highways, foundation pit and hydroelectric，etc.
In order to ensure the construction project smooth implementation, the need to reinforce the soaking pit, Sinorock self drilling anchor bolt as the grouting reinforcement technique which is good for the foundation pit.