湖南大力电建器材制造有限公�?/title> <style type=text/css>  </style> </head> <body topmargin="0" leftmargin="0"> <div align="center"> <center> <table border="0" width="782" cellspacing="0" cellpadding="0" height="225" bgcolor="#5a86ff"> <tr> <td width="780" bgcolor="#3169ff" height="105" colspan="2"><font color="#ffffff"><img border="0" src="images/top.jpg" width="780" height="102"></font></td> </tr> <tr> <td width="780" bgcolor="#5a86ff" height="192" colspan="2" valign="top"> <table border="0" width="103%" cellspacing="0" cellpadding="0" height="37" bgcolor="#7396ff"> <tr> <td width="55%" height="1" bgcolor="#5a86ff"><img border="0" src="images/dd.gif" width="437" height="94"></td> <td width="45%" height="1" bgcolor="#5a86ff" valign="middle">　</td> </tr> </center> <tr> <td width="30%" height="35" valign="middle" bgcolor="#5a86ff" colspan="2"> 　 <div align="center"> <center> <table border="0" width="100%" cellspacing="0" cellpadding="0" height="1264" bgcolor="#adcef0"> <tr> <td width="698" height="60" colspan="2"> <p align="center"> </p> <p align="center"><a href="gangsi.htm"><img border="0" src="nj/button1.1.gif" width="97" height="25"></a><a href="ganguan.htm"><img border="0" src="nj/button1.2.gif" width="97" height="25"></a><a href="tieta.htm"><img border="0" src="nj/button1.3.gif" width="95" height="25"></a><a href="duxin.htm"><img border="0" src="nj/button1.4.gif" width="95" height="25"></a> <a href="qizhongji.htm"><img src="nj/button1.5.gif" width="93" height="25" border="0"></a></p> <p align="center">　</p> </center> </td> </tr> <center> <tr> <td width="698" height="301" colspan="2"> <h1 align="center"><font color="blue" size="4">�?�?�?nbsp;</font></h1> <h1 align="center"><font size="2" color="blue">薄壁混凝土钢管简�?/font></h1> <p align="left"><font color="blue"> 大力公司生产的薄壁离心混凝土钢管是介于钢管和离心钢筋混凝土环形截面构件之间的一种新型钢—砼复合结构。它不仅可以充分发挥钢和混凝土这两种材料物理力学特性，而且可以克服它们在单独使用条件下的缺点。钢管可借助离心混凝土内衬管增强管壁的稳定性，提高构件的抗压承载能力，防止钢管内壁的锈蚀。混凝土可借助钢管对混凝土的套箍作用，使混凝土处于双向或三向受压应力状态，大大提高其抗压强度和抵抗变形能力，从根本上解决了混凝土电杆的裂缝问题，且具有钢结构可焊性和易于组装的特性，该产品已通过了北京良乡电力研究所的试验鉴定。可以组合成多种形式的塔架结构。广泛应用于220kv及以下电压等级线路和变电站支柱�?br> 与离心钢筋混凝土电杆相比具有如下优点�?br> �?）在相同承载能力条件下，可减少截面尺寸，节省水泥40%以上，减轻自�?5%左右�?br> �?）从根本上解决混凝土电杆所存在的裂缝问题，延长使用寿命�?br> �?）不受钢模规格的限制，可以根据工程需要生产任意规格和长度的构件；<br> �?）大大提高构件的抗冲击及抗震能力，在生产搬运和安装过程中基本无破损率�?br> �?）由于刚度好、稳定性好，取消了拉线，流畅美观的造型更可以美化环境、装点市容�?br> 与钢管结构或普通钢结构相比，除具有钢管结构的优点外，还可以�?br> �?）节省钢�?5%�?0%左右，降低造价20%�?0%左右�?br> �?）解决了钢管结构的内壁防腐问题；<br> �?）大大提高了结构的局部稳定性（对钢管结构而言），增大了截面刚度，减少变形�? </font> <p><font color="blue">　</font></td> </tr> <tr> <td width="342" height="262"> <p align="center"><img border="0" src="images/tieta.1.jpg" width="285" height="178"></td> <td width="358" height="262"> <p align="center"><img border="0" src="images/gangua14.jpg" width="285" height="178"></td> </tr> <tr> <td width="342" height="14"> 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