The collapsible loess is often met during the construction of the high - grade highway in the loess area , and the main failure is the uneven subsidence of the roadbed and the culvert , which affects the safe usage of the roadbed and the culvert , etc . directed against this , based on the chankou - lanzhou freeway construction , the paper analyzes the application of the composite ground formed by lime - soil pile under the bridge and designs the project , discusses the rules of the contact pressure , the stress ratio of the pile and the soil , compares the p - s curves of one pile , the composite ground formed by one pile and the composite ground formed by two piles based on the in - situ plate loading test , evaluates the bearing capacity of the composite ground of the project 黄土地区的高等级公路建设中经常遇到湿陷性黄土问题，其病害类型主要是地基土受水浸湿后引起路基、桥台、涵洞等的不均匀沉降，直接影响路基、构造物等的正常使用。针对此问题，本文依托甘肃谗口至兰州柳沟河高速公路建设工程，对桥基灰土桩复合地基应用的可行性进行了深入分析，根据具体工程进行了合理的设计与计算，并配合现场静载荷试验及压力盒实测数据，探讨了基底应力分布规律，桩土应力比，变形模量的变化关系，对比分析了单桩、单桩复合和双桩复合的p ? s关系，对桥基灰土桩复合地基承载力进行了整体评价。
This design of database structure is reasonable and has the characteristics of clear information classification , distinct arrangement , convenient to look up and easy to expand etc . finally , benefits from practicing the amrs are in detail analyzed , and according to trends of new automatic meter reading technology , and then future development of amrs is predicted 文章对数据库结构进行了合理的设计构思，使其具有信息分类明确、层次清晰、查询方便快捷、可扩充性好等特点。最后，我们作了详细的实施自动抄表系统的效益分析，并根据我国自动抄表新技术的发展趋势，对自动抄表系统的发展作了客观的预测。
Therefore , the precise estimate for deflection upwards of prestressed concrete bridge , from which searching for the reasonable design and construction method , is very important for practical projects . the theme of this paper is to solve the problem about how to determine the deflection upwards precisely and to seek the control methods of over - deformation 因此，对预应力混凝土桥梁的起拱度进行较精确的预估，利用计算的起拱值来寻求更为合理的设计和施工控制方法，从而对工程实践具有较强的指导意义。
The last chapter discusses the prospects of stock index futures in china ' s stock market . in this chapter , the author interprets the important roles of stock index futures for china ' s capital market , analyses the possible negative effects brought about by stock index futures , and consider that the conditions are getting mature . combining the international practices , this chapter raises my suggestions in the trading schemen 7 contract designing as well as supervisory system of stock index futures in china 尽管目前仍存在分歧，但大多数研究结果有助于澄清关于股指期货市场会加剧现货市场波动性的不切实际的指责和误解；第四部分考察了美、日、港三种股指期货市场的监管模式及各自的特征，并进行了比较分析，这对于我国未来金融期货市场的监管模式不无借鉴意义；本文最后一部分对我国开展股指期货交易进行了探讨，论述了推出我国的股指期货交易对于我国资本市场的健康发展有着重要的现实意义，同时对可能产生的负面影响进行了全面分析，并认为我国推出股指期货的条件也在日趋成熟，本部分还结合国际惯例，对我国股指期货交易模式、合约设计以及监管模式提出了较为合理的设计方案。
The object to study in this paper is the electric heat reservoir boiler , which is used to supply heat water and bask for the resident population . the use of the system define the character of the output medium with the lower request on quality and parameter , at the same time , it ask the boiler should has the higher character on the respect of the cost , reliability , economy , and so on . hence , the paper carefully design and study the system for the choice and design of the boiler core heating componet , the lay of the heat exchanger , the working status of the heat reservoir equipment , the adjustment and control mode of to supply heat water . the study work mainly include underside some contents , forexample : 1 . to confirm the heat medium parameter to adapt the requirements of the most of the heating equipments and to design the instruction of the boiler and heat reservoir as simple as possible 围绕上述原则，本文从电热锅炉核心加热元件的选型及设计、换热面的布置、蓄热设备的运行工况、供热的调节方式以及控制方法进行了较细致的研究和计算，具体研究工作有以下几个方面： 1 .根据使用要求，确定适用于多数采暖设备的热介质参数，设计在结构型式上尽可能简单的锅炉和蓄热器； 2 .对制造加热元件电热管的各种材料进行了对比和分析、在结构尺寸上进行了仔细的分析和计算，根据实际使用条件给出合理的设计，使其具有较高的可靠性和使用寿命； 3 .对不同换热面布置形式进行传热分析。
