The results indicate that the bored pile works well and has high potential carrying capacity. Under the precondition of construction quality, we can shorten pile's length and reduce investment through the measurement of pile's axial force and pile's end resistance.

結果表明，黃土地區的鉆孔灌注樁有較高的承載潛力和良好的工作性狀，在保證施工質量的前提下，可借助樁身軸力傳遞和樁端阻力的量測，縮短樁長，節約投資。

Construction process of underwater bored concrete pile as well as points for attention in construction is briefly introduced. Based upon analysis of engineering quality problems frequently encountered in construction corresponding prevention and treatment measures are proposed in order to ensure trouble-free construction of bored concrete pile.

簡述了水下澆筑混凝土的過程及注意要點，分析了水下澆筑混凝土過程中經常遇到的工程質量問題，并介紹了預防及處理措施，以保證鉆孔灌注樁工程的順利進行。

CZ-1200 percussion drill was developed to improve and perfect the performances and structures of CZ-22 cable percussion Rig used in diaphragm wall, bored pile and water well drilling engineering in China.

針對目前國內防滲墻、灌注樁樁孔施工及水井鉆鑿的主要設備CZ-22型鋼繩沖擊式鉆機在使用過程中的一些不足之處，研制開發了CZ-1200型沖擊鉆機。

Analysis of water emitting from the top of bored cast-in-situ Pile as well as settlement

鉆孔灌注樁樁頂冒水原因分析及處理