Precast concrete jacking pipes, Civil Engineering

Assignment Help:

Question

While precast concrete jacking pipes, from time to time grout holes are calculated inside these precast pipes. Give specific and key reasons?


Answer


Grout holes are there in precast jacking pipes for following reasons-

(i) They serve as locations for inoculation of bentonite or other lubricant. Lubricant is used for together granular top soils and cohesive soils to trim down frictional resistance. For cohesive soils, soils cannot get onto pipes by presence of lubricant and the shearing plane lies within lubricant. On other hand, for granular soils, lubricant mixes with soils with a considerably reduced friction. With use of lubricant, longer pipe lengths are able to be jacked without use of intermediate jacking station.

(ii) They give inlet locations for subsequent grouting works after completion of pipe jacking to fill totally the void space b/w pipes and surrounding soils.

(iii)They are used as lifting holes while placing precast jacking pipes into rails within jacking pits.

 

 


Related Discussions:- Precast concrete jacking pipes

Define corrosion - deterioration of steel structures, Define Corrosion - De...

Define Corrosion - Deterioration of Steel Structures? Corrosion is the principle cause of deterioration of steel structures. Corrosion of steel is an electrochemical process th

Verify the total active thrust on the wall per lineal metre, A smooth backe...

A smooth backed vertical wall is 6.3 m high and retains a soil with a bulk unit weight of 18 kN/m 3 and φ = 18°. The top of the soil is level with the top of the wall and is horiz

Structural analysis_cantilever trusses, Obtain the values and direction of ...

Obtain the values and direction of the supporting reactions of the truss given below. Use the method of section to determine the forces in each member.

Engineering mathamatics, #question.A strain gauge arrangement is used to me...

#question.A strain gauge arrangement is used to measure the applied force of a comnplex shaped civil engineering structure. Theoretical analysis have been round the relationship be

Design approach for the spacing of min-piles, Design approach for the spaci...

Design approach for the spacing of min-piles For close spacing of min-piles, it would provide substantial cost savings with reduction of pile cap size. Though close spacing of

Particle size distribution - soil compaction, Particle Size Distribution (G...

Particle Size Distribution (Gradation): The particle size distribution is determined by passing the aggregates through a set of standard IS sieves (Figure) and determining th

Culverts - causeway and bridges, Culverts, Causeway and Bridges: Roads...

Culverts, Causeway and Bridges: Roads have to cross several natural streams like - rivers and canals. They also have to cross railway lines and cross-roads. The structures nee

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd