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Hammering steel pipe diameter 219

The steel pipe Ø219 metres was installed. Total length 18 metres. Depth of installation 2 metres. The machine used for the installation MAX K130S.

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Two pipe sections, 9 meters each.

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A large space around allows us to make long start pit. Otherwise, it would be necessary to cut the pipes into shorter sections.

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We have to remember, before starting of making installation, to weld steel rings: one inside and one outside, at the beginning of steel pipe. As a result we achieve less friction between steel pipe and soil during installation. It will increase the total length of installed pipe and reduce the time of installation. How to make it, please look in the HOW TO DO section. 

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Using the excavator, first we had been making the End pit and Start pit. Then the steel pipe was placed in the Start pit.

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The machine was mounted on a steel pipe. On the photo below we can see one mistake. The pipe was not mounted on the machine along the machine axis.

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In this situation, not all the energy of the machine's impact is transferred to the pipe. The part of energy is wasted. And the instalation takes longer.

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 A simple mathematical relationship applies here:

F(useful) = F(applied) x cos α

The α is an an angle betwwen axis of mole and axis of hammering pipe. As we know, the cosine function graph looks like this:

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As an example: 10 degrees of deviation reduces the impact energy transferred to the pipe by about 20%.

Difficult ground conditions meant that the installation 18 meters of pipe lasted several hours. It was heavily compacted clay, which had no way to flow out during installation. 

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In such cases, it is worth making a hole at the end of the pipe. Or, instead of the ears welded to the pipe, make holes for mounting the fastening belts.ilustracja   ilustracja

Finally tip: It is worth to protect the excavation walls. Otherwise the ground may flood the excavation and you will have to do the start pit and end pit again.

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 Contact

TERMA Sp. z o.o.
Czaple 100
80-298 Gdańsk
 mole@termamax.com

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CONTACT IN
ENGLISH:
 +48 607 451 268

CONTACT IN
RUSSIAN:
 +48 607 451 268

CONTACT IN
SPAIN:
+48 607 451 099


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MAX K130S WON THE RODEO 2012
FIRST INTERNATIONAL TRENCHLESS TECHNOLOGY COMPETITION
 


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MAX K95S HAS BEEN AWARDED
EXPERT 2012
during THE INTERNATIONAL NO-DIG CONFERENCE


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MAX K55
HAS BEEN AWARDED
EXPERT 2014
during THE INTERNATIONAL NO-DIG CONFERENCE
 
 

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