EVALUATION AND ANALYSIS OF BEARING CAPACITY OF BORED PILES AND DEEP-LAID PILE-BARRETTE FOR A HIGH-RISE BUILDING ON LOOSE GROUNDS BASED ON CALCULATIONS AND FIELD TESTS

The study describes the standard procedure of the assessment of the bearing capacity of piles by field methods used in the Russian Federation. Basing on the example of an experimental deep-laid foundation pile (length L = 65 m, diameter D = 1.2 m) intended for a high-rise building designed for a thick layer of loose ground the study demonstrates the structure of a loading system on site and the results of static tests of piles in comparison with the results of analytical and numerical calculations. On the same construction site an experimental barrette-pile of rectangular cross-section measuring 3.3 x 1.1 with a length of 65 m was installed with the base in solid Proterozoic clays. The pile test was carried out using Osterberg cells. For this purpose in the process of the installation of the pile strain gauges were mounted in its reinforcing cage at 9 levels. The test barrette-pile was carried out in two stages. On the first stage a standard test of the whole pile in the top-down direction was performed (Top - Down). On the second stage, after reaching the maximum possible load, the “O - cell” element test was performed transmitting the load in two directions (up and down). “O - cell” was located at a depth of 50 m in the layer of blue- stone. The article contains the graphs of the movements of pile from under the load applied on the first and second stages of the tests and the general assessment of the load-bearing capacity of the barrette-piles by different methods

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Application of Long-Short-Pile Composite Foundation of High-Rise Building in Soft Soil

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.256-259.57 ◽

2012 ◽

Vol 256-259 ◽

pp. 57-60

Author(s):

Rong Fang Song ◽

Ling Yun Lang ◽

Jing Wang

Keyword(s):

Bearing Capacity ◽

Calculation Method ◽

Design Method ◽

Soft Soil ◽

Composite Foundation ◽

Soft Ground ◽

Design Calculation ◽

Actual Measurement ◽

High Rise ◽

High Rise Building

A case of the long-short-pile composite foundation in liquefied soft soil under a 30-storey high-rise building is presented, in which the long and short piles are made of cement-flyash-gravel (CFG) and lime. A new design calculation method of bearing capacity and settlement of composite foundation is introduced, and the calculated value is compared with the actual measurement. The results show that the liquefaction of soft ground is eliminated and the demand of load and settlement for upper building is met. At the same time, it is proved that the design method is feasible.

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Subgrade reaction and load-settlement characteristics of gravelly cobble deposits by plate-load tests

Canadian Geotechnical Journal ◽

10.1139/t98-044 ◽

1998 ◽

Vol 35 (5) ◽

pp. 801-810 ◽

Cited By ~ 15

Author(s):

Ping-Sien Lin ◽

Li-Wen Yang ◽

C Hsein Juang

Keyword(s):

Bearing Capacity ◽

Field Tests ◽

Load Test ◽

Subgrade Reaction ◽

Plate Load Test ◽

Modulus Of Subgrade Reaction ◽

High Rise ◽

Undisturbed Samples ◽

Load Tests ◽

Mat Foundations

This paper presents the result of plate-load tests conducted on a gravelly cobble deposit in Taichung Basin, Taiwan. The geologic formation of the gravelly cobble deposit makes it very difficult to obtain large undisturbed samples for laboratory testing. These field tests provide an opportunity to examine the applicability of existing theories on bearing capacity and subgrade reaction in this geologic formation. The modulus of subgrade reaction is of particular importance in the local practice of designing high-rise buildings on mat foundations. The results of the plate-load tests on this soil deposit are analyzed and discussed.Key words: plate-load test, gravelly cobble deposit, modulus of subgrade reaction, bearing capacity.

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SIMULASI KUAT PENERANGAN GEDUNG BERTINGKAT MENGGUNAKAN SOFTWARE DIALUX EVO 6.2. DI GEDUNG L1 TEKNIK ELEKTRO UNIVERSITAS NEGERI JAKARTA

Journal of Electrical Vocational Education and Technology ◽

10.21009/jevet.0032.07 ◽

2020 ◽

Vol 3 (2) ◽

pp. 28-31

Author(s):

Azhari Jum’atullah ◽

Irzan Zakir ◽

Massus Subekti

Keyword(s):

Measurement Method ◽

Standard Procedure ◽

Measuring Instrument ◽

Measurement Result ◽

Average Value ◽

High Rise ◽

High Rise Building ◽

Percent Increase ◽

Drawing Room ◽

Manual Calculation

The purpose of this research is to get the strong value of lighting at L1 building of Universitas Negeri Jakarta and compare the measurement result using luxmeter with software of Dialux Evo 6.2. This research uses engineering methods by utilizing three ways of measurement, manual calculation and simulation of Dialux Evo 6.2. Measurement method using Luxmeter as measuring instrument to get the measured value of the measured light in the learning room based on the standard procedure of calculation according to SNI and the simulation using the program of Dialux Evo 6.2 to predict the strong value of the illumination that should be in the building. The results of this study indicate that the average value of the average light is still not much according to the standard. Then by manual calculation and simulation, the strong value of illumination that should be in the building is also below 350 lux for study room, under 500 lux for laboratory, and under 750 lux for technic al drawing room. Then to improve the design of the high rise building, to achieve a strong value of lighting above 350 lux, 500 lux and 750 lux can be obtained by changing the wall color characters that increased to reach 3- 9.6 percent, a 52-84 percent increase after changing the point of light , as well as an increase of 54-85 percent after changing the color of the walls and the point of light. Abstrak Tujuan dari penelitian ini adalah untuk mendapatkan nilai kuat penerangan pada gedung L1 Universitas Negeri Jakarta dan membandingkan hasil pengukuran menggunakan luxmeter dengan software Dialux Evo 6.2. Penelitian ini menggunakan metode rekayasa teknik dengan memanfaatkan tiga cara yaitu pengukuran, perhitungan manual dan simulasi Dialux Evo 6.2. Cara pengukuran menggunakan Luxmeter sebagai alat ukur untuk mendapatkan nilai kuat penerangan yang terukur pada ruang belajar berdasarkan standar tata cara perhitungan menurut SNI dan cara simulasi menggunakan program Dialux Evo 6.2 untuk memprediksi nilai kuat penerangan yang seharusnya terdapat pada gedung bertingkat. Hasil penelitian ini menunjukan bahwa nilai kuat penerangan rata-rata yang masih banyak yang belum sesuai standar. Kemudian dengan cara perhitungan manual dan simulasi, nilai kuat penerangan yang seharusnya terdapat pada gedung bertingkat tersebut juga masih dibawah 350 lux untuk ruang belajar, dibawah 500 lux untuk laboratorium, dan dibawah 750 lux untuk ruang gambar teknik. Kemudian pada perbaikan desain gedung bertingkat tersebut, untuk mencapai nilai kuat penerangan di atas 350 lux, 500 lux dan 750 lux dapat diperoleh dengan merubah karakter warna dinding yang mengalami kenaikan mencapai 3-9,6 persen, kenaikan 52-84 persen setalah merubah titik lampu, serta kenaikan 54-85 persen setelah merubah warna dinding dan titik lampu.

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EXPERIMENTAL TESTS OF A BEARING CAPACITY OF «FUNDEX» PILES AFTER THE LONG “RELAXATION” IN CLAY SOILS THE DEAD PRESSING AND PULLING-OUT LOADS

Construction and Geotechnics ◽

10.15593/2224-9826/2019.4.02 ◽

2019 ◽

Vol 10 (2) ◽

pp. 13-29

Author(s):

A. V Savinov ◽

V. E Frolov ◽

Y. N Brovikov ◽

M. P Kozhinskiy

Keyword(s):

Bearing Capacity ◽

Field Tests ◽

Experimental Tests ◽

Soil Conditions ◽

Field Methods ◽

Technical Science ◽

Pull Out ◽

Geological Conditions ◽

Wide Range ◽

The Dead

In the article analyzes the results of experimental tests of new “Fundex” piles for The City of Saratov. Сlassification of piles based on their interplay with the pile base has been devised by Doctor of Technical Science, Professor F.K. Lapshin. Changes introduced in 2016 into SP 24.13330.2011 “Pile foundations” concerning calculation of the displacing stuffed concrete piles. The short analysis of history of creation of tables SP 24.13330 by determination of rated resistance on a lateral area and under the lower end of piles is carried out. It is shown that these sizes are not the limit resistances at exhaustion of a carrying capacity of a soil at “failure”, and are accepted with some stock at achievement by a pile of “predetermined” settling. There has been noted the existence of a large number of piles testing methods by means of incrementally increasing load different from methodology GOST 5686-2012 “Soils. Methods of field trials of piles” by various assessment criteria of the ultimate pile bearing capacity. Two identical piles have been manufactured in identical soils and after a long (3 months) “relaxation” without load tests have been conducted under GOST 5686 with static indenting and pull out loads. Engineering-geological conditions of the platform and distance between piles excluded their interference at manufacture and tests. the dead pressing and pulling-out loads. Comparison of results of field tests of “Fundex” piles to design values of a bearing capacity of the displacing piles determined by the recommendations of SP 24.13330 is carried out. The essential divergence of the experimental and estimated values at assessment of a bearing capacity of a heel of a pile is noted. Conclusions are drawn on need of additional experimental research of the basis of “Fundex” piles for the wide range of soil conditions by laboratory and field methods with parallel tests static indenting and pull out loads.

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DEVELOPMENT OF A METHOD FOR CALCULATING THE BEARING CAPACITY OF BORED CONICAL PILES

Bulletin of Belgorod State Technological University named after V G Shukhov ◽

10.34031/2071-7318-2021-6-9-28-36 ◽

2021 ◽

Vol 6 (9) ◽

pp. 28-36

Author(s):

I. Rybnikova ◽

A. Rybnikov

Keyword(s):

Bearing Capacity ◽

Field Tests ◽

Side Surface ◽

Strength Properties ◽

Empirical Method ◽

Full Scale ◽

Load Bearing Capacity ◽

Load Bearing ◽

Static Tests ◽

Ground Resistance

Three methods for determining the load-bearing capacity of bored conical piles are presented, considering the additional forces of the ground rebound along their inclined side surface under vertical load. It is proposed to determine the bearing capacity according to the results of field tests using the coefficient of transition from the maximum permissible settlement of the building foundation to the settlement of the pile obtained during static tests. Its value varies from 0.1 to 0.3 depending on the angle of the pile taper. To determine the bearing capacity of the empirical method, tabular data of the ground rebound forces on the side surface of the piles are developed. It depends on the strength properties of the base soil, the angle of the pile taper and the depth of the location of the changing cross-section of the pile along the length. The process of compressing the soil in a drilled well with an elastic cylindrical pressiometer is close to the occurrence of a ground rebound when it is pushed apart by the side surface of a conical pile during sediment under load. It is proposed to determine the ground resistance on the side surface of conical piles according to the same dependence as when processing the results of pressiometric tests of soils, taking into account the introduction of a correction factor depending on the parameters of the pile. The calculated load-bearing capacity of the piles, determined by the proposed methods, differs from the actual load-bearing capacity, determined by the results of static tests of full-scale piles, within 10 %. However, these methods need to be improved with the accumulation of statistical data for testing full-scale piles in different ground conditions.

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Assessment of the bearing capacity of piles during static load test

Construction and Architecture ◽

10.29039/2308-0191-2020-8-4-22-27 ◽

2020 ◽

Vol 8 (4) ◽

pp. 22-27

Author(s):

Pavel Gavrilov ◽

Vyacheslav Glukhov

Keyword(s):

Bearing Capacity ◽

Static Load ◽

Field Tests ◽

Load Test ◽

Static Load Test ◽

Static Tests ◽

Standard Values ◽

Bored Piles ◽

The Moment ◽

Experimental Researches

The purpose of this research is to estimate the bearing capacity of bored piles with broadening, formed by stone rolling. A series of static tests of the existing piles was performed in accordance with the requirements of the current regulatory documentation, the analysis of the obtained results was carried out. According to this experimental researches, was made a conclusion about the advisable to take into account the standard values of settlements at the determining of the bearing capacity of piles by ground. The results of field tests were compared with the calculated values, determined by calculation with the recommendations of SP 24.13330.2011. Noted, that the value of load, corresponding to the moment of the pile «failure», should be taken as a criterion of the factual bearing capacity.

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ANALISIS FAKTOR-FAKTOR PENYEBAB KETERLAMBATAN WAKTU PADA PEKERJAAN BASEMENT GEDUNG BERTINGKAT SEMI TOP-DOWN

JMTS: Jurnal Mitra Teknik Sipil ◽

10.24912/jmts.v3i4.8371 ◽

2020 ◽

Vol 3 (4) ◽

pp. 1335

Author(s):

Joshua Wangsadiputra ◽

Jane Sekarsari

Keyword(s):

Construction Project ◽

Test Reliability ◽

Relative Importance ◽

Top Down ◽

Building Projects ◽

Productivity Level ◽

High Rise ◽

High Rise Building ◽

Importance Index ◽

Building Project

Time delays in construction project will be very detrimental for both the provider and user of construction service because it can cause a conflict which leads to time demand and additional cost. The timeliness in construction of basement is one of the important aspect to gain a success at construction project, remembering basement is an early phase of development at high-rise building project. The purpose of this study is to analyze the factors that can cause time delay in high-rise building semi top-down basement work. The research method used in this study is quantitative and descriptive approach with questionnaire distribution to some high-rise building projects with semi top-down basement. With the help of SPSS software, next step is to analyzing the data in the form of a validity test, reliability test, normality test, and Relative Importance Index (RII) test. The result of this study shows 5 factors that cause the most influence the delay of semi top-down basement work based on the importance ranking is variation and changes of order by owner, low productivity level of labors, leak on the diaphragm wall, repeated changes rebar layout due to space that too narrow, and material delivery delays. ABSTRAKKeterlambatan waktu pada pelaksanaan proyek akan sangat merugikan para pelaku jasa konstruksi karena dapat menyebabkan konflik yang berujung terjadinya tuntutan waktu dan biaya tambahan. Ketepatan waktu pada pekerjaan basement merupakan salah satu aspek penting dalam kelancaran suatu proyek konstruksi, mengingat basement merupakan salah satu pembangunan tahap awal pada proyek gedung bertingkat. Penelitian ini bertujuan untuk menganalisa faktor-faktor yang dapat mempengaruhi keterlambatan waktu pada pekerjaan basement semi-top down. Metode penelitian yang digunakan pada studi ini adalah pendekatan secara deskriptif kuantitatif dengan penyebaran kuesioner kepada beberapa proyek gedung bertingkat dengan basement semi top-down. Selanjutnya, dilakukan pengolahan data dengan bantuan software SPSS berupa uji validitas, uji reliabilitas, uji normalitas, dan Relative Importance Index (RII). Hasil penelitian menunjukkan, terdapat 5 faktor yang paling mempengaruhi keterlambatan pekerjaan basement semi top-down menurut tingkat pengaruhnya yaitu perubahan perintah kerja dan variasi dari owner, produktivitas pekerja lapangan yang rendah, terjadi kebocoran pada Dinding Penahan Tanah (DPT), pengaturan tata letak penyimpanan tulangan yang berulang-ulang akibat lahan yang terlalu sempit, dan pengiriman material yang terlambat.

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