Skip to main content

Menard Presuremeter test

 Menard presuremeter test is an in situ stress controlled loading test performed on the wall of the borehole using cylindrical probe which can expand radially.

From the readings, stress strain curve can be obtained which yields : 

a. the presuremeter modulus 

b. the creep presure (yields presure)

c. the limit presure (failure presure)

Figure A.6.1 shows schematiic diagram of Menard presuremeter test and typical test curves 

1.2 Equipment 

(1) The Monitoring Unit 

Equiped with device to preciesly regulate the presure applied to the probe and read is volume change with presure increment and time. A gas cylinder provides the pressure source. It  includes a 800 cm3 volumeter with sight of tube, a main pressure a regulator , a differential presure regulator, presure gauge 0-2.5 and 0-6 Mpa for the measuring and guard cell (0.06 and 10 Mpa as option for soft soil and weak rock test) and the necesary valves and coupling. 

(2) The palstic tubing 

This coaxial or twin tubbing , flexible and of high resistance, conects the probe to the monitoring box with minimum deformmation. 

(3) The 3-Cell Probe

It includes a central measuring cell, filled with water . Its Volume change are read on the monitoring box volumeter. The probe is totally protected by rubber cover which is inflated by gas to form the 2 guard cell. Pressure applied ti the borehole walls are kept constant along the 3 cells through the differential pressure regulator to ensure a true cylindrical deformation along measuring cell. 

1.3 Test Procedure 

The borehole drilled so as to minimize wall disturbance and keep cavity diameter compatible with the probe size. The probe is lowered into the borehole to the required test depth and the pressure is applied by equal increments. Presure and volume readings are taken on the monitoring box.

In graveely soils under water table where the borehole would cave-in, the probe can be inserted in specially fitteds probes can also be part of string of pipes to be forced into soft soils, sometimes together with a static cone penetration device. 
























 

Comments

Post a Comment

Popular posts from this blog

Statigrafi dua mega proyek Indonesia

Ini statigrafi dua mega proyek di Indonesia. Mungkin ada yang bisa bedakan. pada MRT ada istilah aluvium dan dualivium. Sedangkan yang bawah tidak ada hanya klasifikasi tanah. Juga saya sering temui soal pewarnaan yang tidak sesuai juga motif dari jenis tanah. Karena tanah memiliki simbol - simbol tergantung jenis tanahnya. Hanya untuk koreksi ke depannya.   
Post a Comment
Read more

Arigato gozaimasu Patimban

This April is the last month I worked with Patimban. A lot memory happen from beginning it was a sea the continue to build couseway. Piling at couseway form one pier to ther pier, test pile PDA test and PIT and also start excavation.  Also don't forget to drilling test in bagan at sea.  In Patimban I meet 3 japanese people Atsutsi Kawamura, besso and Tishiko Nishio  1. Drilling at sea  Began in April 2021 and ended at June 2021. Firstly we place bagan at sea according the coordinate. then continue mobilize the drilling machine. A lot problem happen like like sea tide,  difficult to move drilling machine from one bagan to other bagan, machine broken and a lot more. From Abutment one to pier 24 about 1 km. 2. Ramp ON Ramp OFF We built a road in swampy area about 500 m from existing road which built with pile slab in Packet 4.  First install bamboo deep about 5 m then continue with matras bamboo then geotextile next embakment about 1 - 3 m.   3. PDA ...
Post a Comment
Read more