The Reasonable Selection Of The Pattern Of Deep Hole Excavated For Building Foundation Surrounding Protection In HangZhou Area

With the continuous increase of construction density and the increasing depth of high-rise construction foundation in Hang Zhou area, the hole excavated for building foundation supports and protects design are facing more and more difficulties. I have collected dozens of cases of late years about holes excavated for building foundation maintenance plans in Hang Zhou, and analyzed the supports and protects structure, stops the water plan, and the monitoring statistics from the construction sites of the hole excavated for building foundation , at the same time taking into consideration of the influences ,exercised by the different foundation characteristics of the eastern and the western region of the city,(eastern region takes the silt, the silt soil ground as its main the focus , while western region takes the silt argillaceous clay ground as the its main focus ,), on hole excavated for building foundation supports and protects plan and comparing the working principles, features, and the application domain of soil nailing wall supports and protects, the deep-level cement stirred the pile gravity retaining wall supports and protects, displacement pile supports and protects, the continuous concrete wall, the gate posture structure etc. I think more attention should be paid to analyzing the factors of stability and deformity of the foundation pit are whether the pressure of soil or water while selecting the appropriate plan of deep hole excavated for building foundationsupports and protects structure . In the eastern region of the city, the method of stops the water or the precipitation is the best choice. In the western region of the city , owing to the poor permeability of the silt argillaceous, the soil problem is our concern, namely the stability of supports and protects structure. Under the condition that the excavation depth is less than five meters and the surrounding ground is relatively wide, the puts the slope excavates should be adopted. While under the condition that the surrounding ground is not wide enough but allowing for the deformity of foundation pit, form of soil nailing or the compound soil nailing supports and protects should be adopted. If the depth of foundation pit is more than five meters, the usual measure is to adapt the displacement pile supports and protects the structure with one or two layers of supports and protects the structure. For exceptional foundation pit, such as more than 10 miles, the continuous wall, which at the same time functions as the basement wall, should be built. The cost of construction will be saved if the three walls can be combined into one.