Grouting of Small Pump Baseplates? Is It worth It?
نویسنده
چکیده
For pump installation most experts recommend installing conventional metallic baseplates on concrete foundations and securing them to the foundation with a combination of anchor bolts and epoxy grout. Many papers have been written on the techniques required to obtain a good quality installation free of voids and properly bonded to the concrete and baseplate itself so as to give a long trouble-free installation life. There is no question that such installations provide a basis for highly reliable pumps that operate at low vibration levels. However when this installation strategy is viewed in terms of the total cost of ownership for the pump, is it really cost effective? This paper examines the total cost of installation of small pumps using conventional metallic baseplates installed with epoxy grout and contrasts this installation strategy with several alternatives. Among these alternatives are polymer concrete baseplates, polymer concrete foundation systems, and pregrouted conventional metallic baseplates. Reliability and vibration data for each installation strategy are presented and the impacts of relative reliability are examined in light of total cost of ownership. WHY ASK THE QUESTION? Machinery alignment is critical to reliability. In the 1960s and 1970s dozens of technical papers dealt with the impact of alignment on machinery failures. At that time as many as two95 GROUTING OF SMALL PUMP BASEPLATES? IS IT WORTH IT?
منابع مشابه
Predicting the Occurrence of Hydraulic Fracture in Grouting Operations Based on the Pressure in the Penetrated Cement Grout
Cement grouting is an operation often carried out to consolidate and seal the rock mass in dam sites and tunnels. The quality and efficiency of a grouting operation depends on various factors such as water take, grout properties and grouting pressure. One of the parameters which have the highest effect is pressure since the application of excessive pressure causes the hydraulic fracture phenome...
متن کاملFactors Affecting Long-Term Efficiency of Compensation Grouting in Clays
Compensation grouting has been attracting attention in recent years to control ground settlement caused by underground construction. A successful and effective application of compensation grouting depends not only on the use of a good monitoring system in the field but also on a fundamental understanding of grout behavior in soils. For compensation grouting in clay, there is a need to consider ...
متن کاملGrouting of Rock Masses
The grouting of rock used to be a quite empirical constructional technique aimed to improve somewhat the physical properties of the masses, which are actually part of the civil engineering project. Different "grouting schools" or "ways of thinking" did develop and a considerable number of recipes were dictated by "great old men" and enforced later on by regulations of any kind. Only in the last...
متن کاملExploration and Grouting of Large-Scale Water Capsule in the Fault Fracture Zone of Yonglian Tunnel
A large-scale water capsule was formed after 8 times inrush of mud and water in Yonglian tunnel. The capsule seriously inhabited the construction of the tunnel. By combining with the geological conditions in tunnel site, the causes and characteristics of the water capsule were analyzed. Its spatial location and size were explorated by comprehensive exploration methods. In order to control the w...
متن کاملNumerical modeling of the effects of joint hydraulic aperture, orientation and spacing on rock grouting using UDEC: A case study of Bakhtiary Dam of Iran
This study aims at presenting a numerical model for predicting grout flow and penetration length into the jointed rock mass using Universal Distinct Element Code (UDEC). The numerical model is validated using practical data and analytical method for grouting process. Input data for the modeling, including geomechanical parameters along with grout properties, were obtained from a case study. The...
متن کامل