The development of a two - component elastic polyurethane sealing material for the anti - seepage of channel is described herein , and then the performed polymer structure , the molar ratio of iaocyanate to hydroxide radical and the effects from the components of the compounded curing agent on the performance of the material are discussed as well 摘要介绍了一种用于管道防渗止水的双组分聚氨酯弹性密封材料的开发，并讨论了基剂预聚体聚合物结构、异氰酸酯和羟基的摩尔比以及复合固化剂组分对材料性能的影响。
Sales : imported and domestic natural rubber , butylbenzene rubber , polybutadience rubber , butyronitrile rubber , epdm rubber , butyl rubber , chlorosulfonated polyethylene tyre types superfine , smell - free , butyl , butyronitrile , color and milk natural rubbers , compound rubbers and reclaimed rubbers ; raw and auxiliary materials for rubber chemical such as rubber accelerator , antiager , black , paraffin , octadecoic acid , zinc oxide , magnesium oxide , titanium pigment , coumarone and powder sulfur ; different specifications of epdm color granules , crossover antiskid rubber floor brick , plastic rubber sites , lawn layout , different specifications of antiskid rubber floor brick , rubber blind - people road brick , plant brick , tree guard brick , top adiabatic brick , road rubber reducer brick , special green rubber tyre rubber granule , rubber powder and product , different rubber and plastic pipe , adhesive tape and plate , flexible rubber soft joint , rubber stop tape , bridge extension device , natural rubber plate pedestal , water - expanding rubber , rubber and plastic air duct , pe / pp / pvc water pipe , fulgurite , flame retardant wire gutter , floor wire gutter , mc nylon product , rubber and plastic machinery and fitting relieve , and processing of different ordinary and special rubber and plastic and nylon products 经营销售：进口、国产天然胶、丁苯胶、顺丁胶、丁腈胶、三元乙丙胶、丁基胶、氯璜化聚乙烯、轮胎类精细、无味、丁基、丁腈、彩色、乳胶类等多种型号天然橡胶、合成橡胶和再生橡胶；硫化促进剂、防老剂、炭黑、石蜡、硬脂酸、氧化锌、氧化镁、钛白粉、古马龙、工业硫磺粉等各种橡胶化工原辅材料；各种规格epdm彩色颗粒，天桥防滑橡胶地砖、塑胶场地、人造草坪铺装、各种规格防滑橡胶安全地砖、橡胶盲道砖、植草砖、树木围护砖、屋顶隔热板、道路橡胶减速块，专用绿色环保型橡胶轮胎胶粒、胶粉及成品，各类橡胶、塑料胶管、胶带、胶板，可挠曲橡胶软接头，橡胶止水带，桥梁伸缩装置，天然胶板式橡胶支座，遇水膨胀橡胶，橡胶、塑料导风筒， pe pp pvc水管、电管、阻燃线槽，地板线槽、 mc尼龙产品、橡塑机械及配件调剂，并承接各种普通、特种橡塑、尼龙产品加工制造。
This paper effectively deals with water inflow for excavated and cast - in - place pile under water with the constrained condition and strata of large water content during the course of forming hole and casting pile by using triple tubes directional jet as waterproof curtain , to decrease the compression for river channel , and ensure safety and quality in the phase of construction 摘要针对水中施工挖孔桩，条件受到限制、地层中含水量较大，为尽可能避免造成对河道的占用与影响，采用三重管定喷技术做止水帷幕，有效地解决了成孔成桩过程中涌水等问题，保证了工程施工的安全与质量。
Designning well tube and drill - hole diameter in order to increase thickness of both annular packing gravel and water - resisting clay , nylon net packing around well tube filters , designing filter layer on the boundary between packing gravel and water - resisting clay and ramming the gravel by working the piston into the well after gravel packing completion and the filling clay for salt - water resisting etc . we succeeded in constructing 3 drinking - water wells in minqin county , proved the affectivity and feasibility of using it and giving a certain technical demonstration of construction of drinking - water well in the same similar to this area 通过孔径与管径的调配设计，增大环状粒料层和止水粘土层的厚度；滤水管外包尼龙纱网；粒料与止水粘土接触界面上设计反滤层；填粒后先行拉活塞利用水力夯实粒料层，再投粘土球止掉上部咸水等措施，在民勤县三口人饮水井施工中取得显著效果，证明了该套成井工艺的有效性和可行性，有望为同类地区人饮水井施工提供技术示范作用。
