Abstract In this paper, the need of obtaining rock integrity index in rapid classification surrounding during tunnel construction is briefly described. The conventional introduced and rapidity its test acquisition analyzed. Based on design quick arrangement for coefficient, a method data preprocessing field wave velocity block (body) face proposed. For first time, two calculation models mass are put forward, one model asymptote method, other trend line method. principle, process, reliability...

To address the need for rapid in situ plugging and repair of hydraulic machinery chemical pipelines to resolve issue that a single curing agent cannot simultaneously achieve excellent mechanical properties epoxy resin systems, this study explores use composite agents. In particular, effective formulations are designed mixing fast slow agents, studying their effects on behavior, quality, resins elucidating influence mechanisms. The results indicate three systems meet requirements (curing time...

In this paper, nonlinear springs and linear under-soil are supposed to model the behavior of soil lying under vertically loaded circular plate. The analysis procedure using is introduced. Dozens loading test data used get estimation elastic modulus for analysis. characteristics each kind also discussed on basis relations between load settlement from field data. Settlements plate calculated by proposed compared with results. settlements in good agreement measured, except that a few...

Many uncertainties to evaluate the subgrade reaction on laterally loaded piles still remain, especially when considering effective stress reduction in soil around due pore water pressure increasing during an earthquake. The authors devised and made appropriate test apparatus for decreasing sand bed by using seepage flow, performed loading tests order investigate acting model pile. It was found out from experimental results that lateral pile at a given level is approximated hyperbola with...

Tripod is the key components of snubbing unit, its strength directly affect normal work unit. Considering structure and force characteristics tripod three-dimensional finite element analysis model established. By using method, mechanical conducted safety evaluation finished by adopting stress classification introducing design standard pressure vessel. The results show that unit are safe reliable under maximum lifting downward force. It provides theory evidence for design. method effective...

With the development of drilling technology, rotary drillstring not only produces random multi-directional collisions with inner wall pipe, also couples and outer annular fluids. This results in a complex system nonlinear fluid-structure interaction. In paper, structure mode operation about are considered, equations dynamics, fluid equation continuity momentum coupled. The three-dimensional numerical model computational method is established fluidstructure interaction dynamic analysis...

On October 6. 2000, a great earthquake with magnitude of 7.3 hit the western part Tottori prefecture, which was named The 2000 Western Prefecture Earthquake. characterized by liquefaction occurred in reclaimed lands around Yumigahama peninsula. In Abe-Hikona housing estate, many houses were also damaged liquefaction. authors investigated twice relationship between and damages to house foundation area after earthquake. This paper presents results investigations, including depth contour...

In previous studies, an analytical method has been developed for design of spread foundations. A hybrid analysis model with nonlinear discrete springs was proposed (2002) and predictions were made load-settlement behavior circular plates in loading tests. The results good agreement test small settlement but departed gradually from the as settlements increased, because soil shear failure neglected. Then, a taking into account local failure. built up applied tests on square clay sandy soils...

"Reply to Discussion on ″Analysis of Nonlinear Soil Behavior under Vertically Loaded Steel Plate Considering Local Shear Failure Soil″." Journal Asian Architecture and Building Engineering, 3(2), p. 366