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In order to implement simultaneous casing while drilling of larger diameter pile holes and water wells in complex strata, a new type of bit for simultaneous casing while reverse circulation drilling with DTH air hammer was developed.

为实现在复杂地层用同步跟管钻进工艺钻凿直径较大的桩孔和水井,设计了一种气动潜孔锤反循环跟管钻进钻头。

Free falling heavy rammer was used in former piling constructions, but the piling depth and pile pipe diameter were comparatively small.

在以往的施工中采用重锤下落打桩,打桩的深度和桩管的直径都比较小。

The programe of setting of steel casings with the mature and effective methods of advance drilling and throwing fills in the clay and the slabstone and the cement is taken.

西江富湾特大桥56号主墩基础为18根φ2.50 m大直径钻孔灌注桩,由于存在深水、基岩倾斜、岩溶等因素,导致了复杂的成孔工艺,采用"钢护筒跟进"方案结合超前钻、抛填粘土、片石、水泥等较成熟且有效的方法进行施工,根据处理溶洞漏浆、塌孔、卡锤和埋锤的经验,总结了深水岩溶桩基的施工技术

Hydraulic pile hammer was a kind of the protection equipment, which was widely used in architecture and dock to make base.

液压打桩锤是用于建筑、码头等桩基础施工的预制桩施工机械。

Heavy hammer ; pile ; soil ; high strain ; impulse response ; heavy hammer and low strike

重锤;桩;岩土;高应变;冲击响应;重锤低击

The column hammer impact expanding pile process is the technology rising in more than ten years and widely being applied in the subgrade treatment of the building industry.

0前言柱锤冲扩桩法是近十几年兴起并广泛应用于建筑行业地基处理的技术,它主要借用强夯的原理采用桩的形式与地基土体共同作用形成复合地基。

column hammer impact expanding pile process ; composite subgrade ; ramming and extruding ; replacement

柱锤冲扩桩法具有夯击能量高、成桩快速、桩体材料可就地取材、工程造价低、处理效果显著等特点,因此在工

The northern sea wall in Gudong Oilfield at Yellow River Delta needed reinforcing so that the feasibility of three kinds of offshore driving pile construction methods was analyzed in consideration of the sea conditions of weather, hydrology and geology in Yellow River Delta area. Finally the driving pile construction scheme using vibrating hammer and piling catamaran was chosen.

黄河三角洲胜利孤东油田北海堤需要加固维修,针对黄河三角洲海域的气象、水文、地质条件,分析了3种海上沉桩施工方案的可行性,最终选择了振动锤双体打桩船沉桩方案。

Based on the pile driving logs, geological conditions on site and results of high-strain dynarnic pile-driving tests of the steel tubular piles driven in decomposed rocks, the effect of diesel and hydraulic hammers in driving these piles is analyzed.

本文根据风化岩地基施打钢管桩的打桩记录,地质条件,高应变动力检测成果进行比较,分析柴油锤和液压锤的使用效果,为在风化岩地基上施打大型钢管桩提供依据和设计施工参数。

Testing results of piles under low strain integrity are normally interpreted using one-dimensional stress wave theory. While one-dimensional stress wave theory is acceptable for pile-driving analysis the responses of piles integrity tests can not be adequately simulated when the hammer and the incident wave length are small in relation to the diameter of the pile.

基桩动测问题的理论基础一维应力波理论只有在锤径桩径比、波长桩径比、桩长桩径比足够大时才能近似成立,否则该问题实际上为应力波在柱体中传播的三维问题。

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