桩锤

In order to analyze the influence of filled metal particles on impact force for hydraulic pile hammer, analytical solution of mathematic model for pile hammer filled with metal particles considering effects of metal particles was presented. In the solution, lumped mass were used as metal particles, a spring was used as contact stiffness between metal particles and hammer body, different variable lumped masses were used as pile hammer, the ram and anvil, a spring and a dashpot were used as the anvil cushion and pile respectively.

为分析填充金属颗粒对打桩锤锤击力的影响，考虑填充金属颗粒的作用，用集中质量块表示填充的金属颗粒，用弹簧模拟金属颗粒与锤体相碰处的接触刚度，用不同的集中质量块表示桩锤、砧座和桩帽，用并联的弹簧、阻尼器表示锤垫，用弹簧表示桩垫，用阻尼器表示桩，建立了平衡方程。

Based on experiences, the calculation method for main parameters and relevant data of pile hammer of vibration pile driver extractor are presented, gives the theoretical basis for the design and application.

结合实践经验，给出了振动沉拔桩机振动桩锤主要参数以及相关数据的计算方法，为振动沉拔桩机振动桩锤的设计和应用提供了理论依据。

In the paper,the dynamic axial response of bar during impact,while the impactor and target are regarded as a system of vibration,is analyzed by means of variables separation method.

杆的冲击问题是一个经典问题，在今日的工程实践中具有重要的应用背景，如在土木工程中打桩过程桩体的应力分析和桩锤的选择。

One DZJ series of adjustable eccentric torque vibration pile hammers, GPE series of cooling water cycle vibration hammer and MD series hydraulic drill holes in the main exported to Japan.

其中DZJ系列可调偏心力矩振动桩锤、GPE系列水循环冷却振动锤及MD系列中孔液压式钻机主要出口日本。

Compared vibratory hammer is not a new pile hammer.

是振动锤不可相比的新型桩锤。

Using non-dimensional calculation, influence of parameter on impact force was analyzed combined with state space method. Then, impact forces generated by common pile hammer and PHFMP were compared.

结合状态空间法，采用量纲一化计算方法分析了各参数对锤击力的影响，并对金属颗粒填充桩锤与普通桩锤产生的锤击力进行了比较。

Furthermore, authors statistic actual impacting times in the local by various types of hammer when the pile drives into the different depth of the bearing stratum, it may offer the reference for the similar engineering to choose the hammer in the future.

因此，如何对该类型的桩进行合理沉桩分析，是桩基施工中急待解决的问题。 2沉桩阻力在沉桩施工的过程中，桩锤的冲击力应大于土层的沉桩阻力，桩才能顺利下沉。

The dynamical and kinematic specialty of hydraulic hammer is analyzed during piling. At the same time, the mathematical model is presented of each process. Based on mathematical model of each stage, simulation and analysis is made. The changing rule of displacement, velocity, acceleration can come to a decision from simulation plot during falling process of pile hammer.

提出桩锤在各个打击过程中的数学模型，并对各阶段进行仿真及分析，研究桩锤下打过程中，桩锤位移、速度、加速度变化规律，为进一步研究生产样机提供了理论依据。

Hydraulic pile hammer is one of ideal prefabricated pile driving machines because it can adjust stress waveform ,decrease stress peak value,prolong effectual act

认为与桩等波阻的细长状锤体能够产生理想的应力波波形；在桩锤重量一定的情况下，可针对不同的地质情况和桩，通过选择不同刚

Following the 2001 corporate DZJ series of new high-tech industries vibration hammer pile of projects passed the provincial-level identification of acceptance, in July 2002 DZJ series of new vibration pile hammer by the National Ministry of Science and Technology included in the national Torch Program.

继2001年公司承担的DZJ系列新型振动桩锤高技术产业化工程项目顺利通过了省级鉴定验收后，2002年7月DZJ系列新型振动桩锤被国家科学技术部列入国家级火炬计划。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。