地铁车站基坑下穿高架施工关键技术

结合上海地铁8号线西藏南路站基坑工程，介绍上海软土地区复杂地质条件下地铁车站基坑下穿高架施工的关键技术及施工措施。通过调整钻孔灌注桩成孔施工工序、调整高压旋喷桩喷射形式与作业间隔、坑内高压喷射地基加固、调整支撑体系、调整结构施工方法、机械设备选型和结构抗浮等关键技术措施，在保证基坑自身安全与稳定的同时，将基坑开挖施工对高架桥墩基础的影响降到最低，并对可能出现的风险提出一系列预案措施。     

Squeezing loading of segmental linings and the effect of backfilling

Overstressing of the segmental lining is one of the major hazard scenarios related to shielded TBM tunnelling in squeezing ground. The present paper deals with this specific problem, addressing the key question of the ground pressure acting upon a segmental lining installed behind a single shielded TBM. Starting with a structured discussion of the influencing factors and their interactions, the paper investigates how the type, location and thickness of the backfilling play an important role with respect to the loading of a segmental lining. Secondly, it explains how to take due account of the actual thickness of the backfilling (which is not known a priori since it depends on the deformations of the bored profile) in a numerical simulation. Thirdly, the paper advances a number of theory-based decision aids which cover the relevant range of ground parameters, initial stress, segmental lining and backfilling characteristics, thus supporting rapid initial assessments of the ground pressure acting upon a segmental lining and making a valuable contribution to the decision-making process.     

自制松土齿在锚孔钻造成孔施工中的运用

介绍了预应力锚索（杆）施工流程、锚孔钻造成孔施工的工作原理及一些关键技术,针对施工实践中遇到的问题,结合工程实例,阐述了自制松土齿在防止锚孔成孔施工中退钻卡钻问题上的应用,实践证明采用该措施是行之有效的。     

一种新的大口径深孔加工技术

介绍一种锻件大口径深孔的套料加工技术。     

本安型掘进机操作箱的研制

为了改进目前掘进机操作箱的种种不足,设计了基于MSP430F249的掘进机操作箱。介绍了该操作箱的系统结构与功能、硬件设计和软件设计。测试结果表明:以MSP430F249为核心控制器的本安型掘进机操作箱,可靠性高、实时性强。     

A fuzzy logic model to predict specific energy requirement for TBM performance prediction

Prediction of tunnel boring machine performance is a critical key for successful tunnel excavations. Specific energy requirement of disc cutters, which is defined as the amount of energy required to excavate a unit volume of rock, is one of the important parameters used for performance prediction of these machines. Much research has been conducted to predict cutting parameters of disc cutters using analytical, empirical and numerical approaches. In recent years alternative methods, such as fuzzy logic, have been extensively used to deal with subjects having ambiguities and uncertainties. In this study, a model was established to predict specific energy requirement of constant cross-section disc cutters in the rock cutting process by using fuzzy logic method. This model is based on experience and the database which consists of linear cutting test results that were generated over for many years at the Earth Mechanics Institute of the Colorado School of Mines. The model predicts specific energy requirements of disc cutters using uniaxial compressive and tensile strength of rocks, disc diameter and tip width, penetration and spacing of cuts.     

锻造镗孔技术在大口径厚壁无缝钢管生产中的应用

通过对成品钢管各项性能的检测,分析了北方重工生产的锻造镗孔无缝钢管的产品质量和特点。结果表明,锻造镗孔无缝钢管的质量稳定可靠,各项性能指标达到或超过相关标准的要求。     

一种多功能调节镗杆设计

针对煤矿机械加工、修理中的高精度内孔加工,普遍存在着刀具调整难、效率低、加工精度难以保证的问题,设计了一种多功能调节镗杆。该装置利用结构简单的差动螺机构,通过斜块实现刀具的粗调和微调,达到调整方便,高精、高效。     

某轮主机缸体断头螺栓镗削修理工艺探讨

通过对某轮主机缸体断头螺栓镗孔修理的可行性,施工影响因素的分析,提出了实际可行的工艺方案,获得了良好的施工效果。     

高速柴油机干式气缸套精镗夹具的设计

气缸套是柴油机的重要零件,精镗是干式气缸套生产过程中的一道重要工序,突破精镗夹具的传统设计思想,采用内压式弹性胀套设计了新型的精镗夹具,阐明了该夹具的设计原理和方法。