TECHNICAL NOTE. CORRELATION BETWEEN CALIFORNIA BEARING RATIO AND DYNAMIC CONE PENETROMETER STRENGTH MEASUREMENT OF SOILS.

1989 ◽  
Vol 87 (1) ◽  
pp. 119-125 ◽  
Author(s):  
JA HARISON ◽  
MC GRANT ◽  
A NATAATMADJA ◽  
GR WOODMAN
Keyword(s):  
Technical Note ◽  
California Bearing Ratio ◽  
Cone Penetrometer ◽  
Strength Measurement ◽  
Dynamic Cone Penetrometer

scholarly journals Assessment Of Designed And Measured Mechanistic Parameters Of Concrete Pavement Foundation

2019 ◽  
Vol 14 (1) ◽  
pp. 37-57
Author(s):  
Yang Zhang ◽  
Pavana Vennapusa ◽  
David Joshua White
Keyword(s):  
California Bearing Ratio ◽  
Cone Penetrometer ◽  
Falling Weight Deflectometer ◽  
In Situ Tests ◽  
Target Value ◽  
Dynamic Cone Penetrometer ◽  
Support Conditions ◽  
Falling Weight ◽  
Pavement Foundation

There are plenty of in situ tests available to examine pavement foundation performance regarding stiffness and support conditions. This study evaluates several in situ tests of the stiffness and support conditions of concrete pavement foundation layers. The principal objective of this study was to evaluate the outputs from Dynamic Cone Penetrometer tests and Falling Weight Deflectometer tests. The California Bearing Ratio from Dynamic Cone Penetrometer tests and the deflection data from Falling Weight Deflectometer tests were correlated to the design parameter – modulus of subgrade reaction k through correlations employed in pavement design manuals. Three methods for obtaining the k values were conducted, with the intent to evaluate which method provides the results most similar to the target value and whether the studied correlations are reliable. The back-calculated k values from Falling Weight Deflectometer deflections and the weak layer California Bearing Ratio correlated k values based on the Portland Cement Association method were close to the target value, while the California Bearing Ratio empirically correlated k based on the American Association of State Highway and Transportation Officials method presented values significantly higher than the target value. Those previously reported correlations were likely to overestimate the k values based on subgrade California Bearing Ratio values.

scholarly journals ANALISIS KEPADATAN TANAH PADA RUAS JALAN MASUK KEMAKAM GURU CANTUNG KECAMATAN KELUMPANG HULU KABUPATEN KOTABARU

2019 ◽  
Vol 5 (1) ◽  
pp. 37
Author(s):  
Dina Heldita
Keyword(s):  
Data Collection ◽  
Carrying Capacity ◽  
Function Analysis ◽  
California Bearing Ratio ◽  
Cone Penetrometer ◽  
Test Results ◽  
Soil Density ◽  
Average Value ◽  
Dynamic Cone Penetrometer ◽  
Highway Planning

Support for highway planning that must be determined according to the optimal traffic requirements for traffic that is in accordance with its function. Analysis of soil density on the Banian-Sungai Durian road uses a Dynamic Cone Penetrometer (DCP) tool with the aim of finding the CBR value of the soil. The value supported is to get the DCP value, the California Bearing Ratio (CBR) value, and the Land Carrying Capacity (DDT) value. Tests carried out along the 1,550 m with a width of 4m. For the point of data collection zigzag per 100 m. The test results show the average value of DCP is 29.32 mm, while the average value of CBR is 5.07%. Design CBR value is 2.24%, with DDT is 4.47%. The CBR value of the design obtained does not meet the standard CBR value requirements that have been set at 6%. It needs to be re-compacted on the ground because it does not meet the CBR value standards that have been determined and approved to add road pavement.Keywords: Land density, DCP, Field CBR, Banian Village

scholarly journals Comparison of California Bearing Ratio (CBR) Value Based on Cone Penetration Test (CPT) and Dynamic Cone Penetrometer (DCP)

2021 ◽  
Vol 4 (2) ◽  
pp. 70
Author(s):  
Reki Arbianto ◽  
Teguh Yuono ◽  
G Gunarso
Keyword(s):  
Soil Layer ◽  
Cone Penetration Test ◽  
California Bearing Ratio ◽  
Small Scale ◽  
Cone Penetrometer ◽  
Penetration Test ◽  
Cone Penetration ◽  
Dynamic Cone Penetrometer ◽  
Heavy Equipment ◽  
Cbr Test

In civil engineering, land is important because as a place for building infrastructure to be built, so that the building infrastructure on it is stable, adequate carrying capacity is needed. The amount of soil bearing capacity can be determined in several ways, including the California Bearing Ratio (CBR) Field Test, Cone Penetration Test (CPT) and Dynamic Cone Penetrometer (DCP). The CBR and DCP tests are often used to determine the level of surface soil density on road structures, while CPT is usually used to determine the hard soil layer on the building structure. However, in certain situations Sondir and DCP data are often used to predict the CBR value, because the test is quite practical and efficient compared to the CBR test. CBR testing requires heavy equipment which in most small-scale projects is not available. In this study, we compared the CBR value based on the data obtained from the Sondir and DCP tests. Data collection was carried out in Surakarta and its surroundings. Based on the test results, the CBR value generated from the DCP test tends to be smaller than that from the CPT test with a ratio of 0.62: 1. This study resulted in the relationship between CBR values from the results of the CPT and DCP tests shown in the following equation: CBR (DCP) % = 0.2552 CBR(CPT) + 2.6306 and CBR (DCP) % = 0.617 CBR(CPT).

scholarly journals HUBUNGAN EMPIRIS DAYA DUKUNG TANAH DASAR MENGUNAKAN ALAT DYNAMIC CONE PENETROMETER (DCP) DAN CALIFORNIA BEARING RATIO (CBR) RENDAMAN UNTUK DISAIN TEBAL PERKERASAN LENTUR JALAN RAYA

2018 ◽  
Vol 1 (3) ◽  
pp. 553-558
Author(s):  
Burhanuddin Burhanuddin ◽  
Junaidi Junaidi
Keyword(s):  
Carrying Capacity ◽  
Empirical Relationship ◽  
Public Works ◽  
California Bearing Ratio ◽  
Future Research ◽  
Cone Penetrometer ◽  
Foundation Soil ◽  
Ground Support ◽  
Dynamic Cone Penetrometer ◽  
Laboratory Test Results

Abstract: Subsoil (sub grade) is the lowest layer in highway construction. The reliability of the pavement thickness design is highly dependent on the accuracy of the carrying capacity of the ground. The carrying capacity of the foundation soil known in the value of California Bearing Ratio (CBR) can be determined by Dynamic Cone Penetrometer (DCP) equipment. The working principle of DCP is very simple and economical in the field. However, since 2013 the Ministry of Public Works has issued a 2013 Pavement Design Destruction Manual (MDP) which requires the use of CBR values from laboratory test results with 4 day immersion samples. The problem that occurs is the time and cost of testing the sample. CBR immersion with 4 days of immersion will take longer. The cost of sampling, sample preparation and sample testing are also more expensive than testing with DCP tools. With this background, this study aims to find an empirical relationship between the value of ground support capacity (CBR) of both tools (DCP and CBR immersion). This research is a preliminary study of Road Laboratory of Faculty of Engineering Unsyiah and is expected to be developed by multiplying future research samples for more precise results. Empirical values obtained after the research is: CBR Dcp = 1.083 + (0.347 x CBR Lab) Abstrak: Tanah dasar (sub grade) merupakan lapisan terbawah pada konstruksi jalan raya. Kehandalan disain tebal perkerasan sangat tergantung pada keakuratan nilai daya dukung tanah dasar. Daya dukung tanah dasar yang dikenal dalam nilai California Bearing Ratio (CBR) dapat ditentukan dengan peralatan Dynamic Cone Penetrometer (DCP). Prinsip kerja DCP sangat sederhana dan ekonomis dilakukan di lapangan. Namun, sejak tahun 2013 Kementerian Pekerjaan Umum mengeluarkan Manual Disain Tebal Perkerasan (MDP) 2013 yang menyaratkan penggunaan nilai CBR dari hasil uji laboratorium dengan sampel rendaman 4 hari. Permasalahan yang terjadi adalah waktu dan biaya pengujian sampel. CBR rendaman dengan 4 hari perendaman akan memakan waktu yang lebih lama. Biaya pengambilan sampel, penyiapan sampel dan pengujian sampel juga lebih mahal dibandingkan dengan pengujian dengan alat DCP. Dengan latar belakang tersebut, maka penelitian ini bertujuan untuk mencari hubungan secara empiris antara nilai daya dukung tanah dasar (CBR) dari kedua alat tersebut (DCP dan CBR rendaman). Penelitian ini merupakan studi awal dari Laboratorium Jalan Raya Fakultas Teknik Unsyiah dan diharapkan dapat dikembangkan dengan memperbanyak sampel penelitian dimasa mendatang untuk hasil yang lebih presisi.  Nilai empiris yang didapatkan setelah dilakukan Penelitian adalah : CBR Dcp = 1.083 + (0.347 x CBR Lab)

EVALUASI NILAI CBR LAPANGAN LAPISAN TANAH DASAR DAN CBR LABORATORIUM PADA PEKERJAAN JALAN LINGKUNGAN DENGAN ASPHALT HOTMIX DAN DRAINASE DI AREA GEDUNG OPERASIONAL 1 PAKET KANTOR OTORITAS BANDARA UDARA WILAYAH VII MANADO

2019 ◽  
Vol 15 (2) ◽  
pp. 95-100
Author(s):  
Richard Wempie Vicky Uguy ◽  
Yosua Richard Dwiputra Elias
Keyword(s):  
California Bearing Ratio ◽  
Cone Penetrometer ◽  
Dynamic Cone Penetrometer

Tanah merupakan salah satu komponen yang sangat berpengaruh terhadap ketahanan suatu struktur perkerasan jalan. Tanah yang memiliki kepadatan yang tinggi sangat baik untuk dijadikan dasar suatu struktur.Untuk mengetahui tingkat kepadatan suatu tanah maka perlu dilakukan pengujian CBR (California Bearing Ratio). Pengujian CBR sendiri dibagi menjadi 2 yaitu CBR Lapangan dilaksanakan dengan alat DCP (Dynamic Cone Penetrometer) pada tanah dasar dan CBR Laboratorium. Tujuan dilakukannya penelitian ini adalah untuk mengevaluasi nilai CBR Lapangan lapisan tanah dasar yang diperoleh dengan alat DCP dengan nilai CBRLaboratorium sampel tanah dari Jalan Ringroad I Kota Manado pada Pekerjaan Jalan Lingkungan Dengan Asphalt Hotmix dan Drainase di Area Gedung Operasional 1 paket Kantor Otoritas Bandara Udara Wilayah VIIManado. Penelitian ini dilaksanakan di Laboratorium Uji Material Politeknik Negeri Manado untuk pengujian CBR laboratorium dan pengujian CBR lapangan dilaksanakan oleh Tim Penguji dari Laboratorium Uji Tanah Politeknik Negeri Manado. Hasil nilai CBR Lapangan tanah dasar rata-rata yaitu : 7,49% dan nilai CBR Laboratorium tanah dari Jalan Ringroad I Kota Manado yaitu : 22,50%. Dapat disimpulkan Tanah Dasar di lokasi pekerjaan memiliki kondisi sedang atau tidak buruk. Disarankan jenis tanah dari Jalan Ringroad I Kota Manado direkomendasi sebagai bahan pengganti atau dilakukan pencampuran dengan tanah asli yang memiliki nilai CBR rendah untuk mendapatkan nilai daya dukung yang optimal sehingga berpengaruh pada ketahanan suatu struktur perkerasan jalan.   

scholarly journals EVALUASI DAYA DUKUNG TANAH DASAR UNTUK MENDUKUNG PENANGANAN KERUSAKAN RUAS JALAN WEELULI - FULUR KABUPATEN BELU – NTT

2017 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Welem Daga ◽  
Melchior Bria ◽  
Anastasia Muda ◽  
Ludofikus Dumin
Keyword(s):  
California Bearing Ratio ◽  
Cone Penetrometer ◽  
Dynamic Cone Penetrometer

Salah satu penyebab kegagalan struktur perkerasan jalan (pavement) dalam melayani arus lalulintas adalah daya dukung tanah (DDT) yang relatif rendah. Hal ini dapat diantisipasi sebelumnya melalui suatu penelitian tanah dasar pada ruas jalan baru maupun peningkatan jalan. Parameter yang paling umum dipakai dalam menilai daya dukung tanah untuk perkerasan jalan adalah nilai California Bearing Ratio (CBR) yang dapat diperoleh baik melalui uji CBR laboratorium atau uji Dynamic Cone Penetrometer (DCP) langsung di lapangan. Dalam penelitian ini akan dievaluasi bagaimana aplikasi dari kedua metode ini untuk menilai daya dukung tanah dasar dengan mengambil kasus di Ruas Jalan Weeluli – Fulur Kabupaten Belu NTT. Ruas jalan ini mengalami kerusakan yang cukup parah karena beban kendaraan yang melalui jalur ini melebihi kapasitas tonase jalan. Hasil dari penelitian ini adalah diperolehnya nilai DDT berdasarkan hasil uji lapangan menggunakan DCP dan hasil uji CBR laboratorium dan nantinya dipakai dalam merencanakan pekerjaan peningkatan ruas jalan Weeluli – Fulur. Hasil perbandingan nilai CBR diperoleh hubungan antara CBR lapangan (y) dengan CBR Laboratorium (x) adalah Linear menurut persamaan y = 1,249x – 0,557.

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