Analysis of Quick Load Tests on Stone Columns: Case Histories

2009 ◽  
pp. 185-185-14 ◽  
Author(s):  
JD Hussin ◽  
JI Baez
Keyword(s):  
Stone Columns ◽  
Case Histories ◽  
Load Tests

scholarly journals Empirical Shaft Resistance of Driven Piles Penetrating Weak Rock

2020 ◽  
Vol 53 (12) ◽  
pp. 5531-5543
Author(s):  
John W. Barrett ◽  
Luke J. Prendergast
Keyword(s):  
Empirical Relationship ◽  
Empirical Relation ◽  
Driven Piles ◽  
Case Histories ◽  
Pile Capacity ◽  
Shaft Resistance ◽  
Fatigue Model ◽  
Load Tests ◽  
Pile Load Tests ◽  
Engineering Projects

AbstractIn this paper, an empirical relationship between the Unconfined Compressive Strength (UCS) of intact rock and the unit shaft resistance of piles penetrating rock is investigated. A growing number of civil engineering projects are utilizing steel piles driven into rock where a significant portion of the pile capacity is derived from the shaft resistance. Despite the growing number of projects utilizing the technology, little to no guidance is offered in the literature as to how the shaft resistance is to be calculated for such piles. A database has been created for driven piles that penetrate bedrock. The database consists of 42 pile load tests of which a majority are steel H-piles. The friction fatigue model is applied to seven of the pile load tests for which sufficient UCS data exists in order to develop an empirical relation. The focus of this paper is on case histories that include driven pipe piles with at least 2 m penetration into rock.

The Performance of Foundations on Various Soils Stabilized by the Vibro-compaction Method

1974 ◽  
Vol 11 (4) ◽  
pp. 509-530 ◽  
Author(s):  
V. Baumann ◽  
G. E. A. Bauer
Keyword(s):  
Organic Soil ◽  
Stone Columns ◽  
Case Histories ◽  
Established Method ◽  
Replacement Method ◽  
Loose Soil ◽  
Soil Deposits ◽  
Compaction Method ◽  
Partial Displacement ◽  
Load Conditions

The improvement of weak or loose soil deposits by the vibrational technique has now become a well established method. Loose or medium dense sands can be compacted with slender, cylindrical vibrators (vibro-compaction method). Cohesive or organic soil can be improved by their partial displacement or replacement with selected granular material which is vibrated into the parent soil (vibro-replacement method). Compaction depth up to 30 m (100 ft) can be achieved.This paper describes the method of construction of compaction columns and stone columns. Method of estimating the settlement of the improved soil under given load conditions is presented. The applicability and limits of the process are outlined.Two case histories are discussed and they were chosen for their various degrees of difficulties encountered in the subsoil and because the settlement specifications placed very strict limits on the foundation performance.

Field performance of the port of Sepetiba test fills

1995 ◽  
Vol 32 (1) ◽  
pp. 106-121 ◽  
Author(s):  
Vinod K. Garga ◽  
Luciano V. Medeiros
Keyword(s):  
Ground Improvement ◽  
Soft Soil ◽  
Soft Clay ◽  
Field Performance ◽  
Stone Columns ◽  
Field Investigations ◽  
Large Program ◽  
Soil Deposits ◽  
Load Tests ◽  
The Cost

The design of the industrial port of Sepetiba, 50 km south of Rio de Janeiro, Brazil, required a detailed evaluation of the underlying soft soil deposits. Initially, on the basis of laboratory tests, it was proposed to remove approximately 3.7 × 106 m3 of the very soft deposits in the stockpile area by dredging and substitute with hydraulic sand fill. Subsequently, in view of the cost of such a measure, a large program of field investigations was initiated to study the in situ characteristics of the soft clay to evaluate whether replacement of this material and (or) ground improvement was necessary. As part of this investigation, two large identically instrumented test fills (test fills B and D), each 65 m2 in plan and 5 m high, with 3:1 slopes were constructed. Test fill B was constructed over natural ground, whereas the subsoil beneath test fill D was treated with stone columns. The instrumentation for each test fill consisted of piezometers, deep settlement plates, surface settlement plates, and inclinometers. This paper provides a description of the field investigations, observations on installation of stone columns, analysis of instrumentation, a comparison of the behaviour of the two test fills, and a discussion on load tests on individual stone columns. Key words : case history, embankment, ground improvement, instrumentation, soft clay, stone columns.

Shear Load Tests on Stone Columns With and Without Geosynthetic Encasement

2009 ◽  
Vol 32 (1) ◽  
pp. 101219 ◽  
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
S. Murugesan ◽  
K. Rajagopal
Keyword(s):  
Stone Columns ◽  
Shear Load ◽  
Load Tests

Floating piles in soft, highly plastic clays

1983 ◽  
Vol 20 (1) ◽  
pp. 159-168 ◽  
Author(s):  
Per-Evert Bengtsson ◽  
Göran Sällfors
Keyword(s):  
Bearing Capacity ◽  
Soft Clay ◽  
Undrained Shear Strength ◽  
Case Histories ◽  
Load Range ◽  
Method Of Calculation ◽  
Tension Tests ◽  
Load Tests ◽  
Plastic Clays ◽  
Undrained Shear

In Sweden the bearing capacity of axially loaded floating piles in soft clay is calculated using the undrained shear strength of the clay (often determined by the field vane test). In this study several load tests, compression as well as tension tests, have been made on well-instrumented piles. The results from these tests, in combination with thorough investigations of the field vane test, have led to a well-documented understanding of the behaviour of floating piles in soft clay.In the article, a method is presented that makes it possible to calculate the load–displacement variation in the permissible load range, as well as the bearing capacity. Results from several load tests are presented and predictions are compared with performance. Keywords: soft clay, time dependence, floating piles, bearing capacity, load tests, method of calculation, case histories.

Sign in / Sign up

Export Citation Format

Share Document