Tag Archives: pipe-jacking

Beijing No Dig Exhibition

The 34th CSTT Exhibition ( China international trenchless technology conference and exhibition ) has concluded successfully in Beijing on Oct 12, 2016.

As the expert in the mud recycling system and equipment manufacturer, Brightway welcomed the customers at home and abroad.

trechless exhibation

trechless exhibation

beijing no dig exhibation

beijing no dig exhibation

During the exhibition, Enrico Boi,the chairman of Association for international trenchless technology seminar,came to visit Brightway No.38 Booth. All sales of Brightway extended a warm welcome to the arrival of the chairman. With the booming construction market trend domestic and overseas,  Brightway believe that we can contribute our efforts to our customers’ projects-tunneling, micro-tunneling, pipe jacking, piling, HDD etc.

TRENCHLESS CASE

TRENCHLESS CASE

NO DIG

NO DIG

What is pipe jacking?

Brightway slurry separation plant is widely used in the pipe jacking, then what is pipe jacking?

The below layout is the typical job site for pipe-jacking.

Mirco-tunneling slurry job site

Mirco-tunneling slurry job site

1. The virgin ground is being excavated to create a manhole pit, and the hydraulic jack is placed at a strategic spot. The size and depth of the manhole pit varies, depending on the specification requirements.

2. The pipes strings are stringed together piece by peice using the hydraulic jacking machine. Each unit of pipe are being lifted down into the manhole pit by a crane. The jacking of pipes towards the destined direction is done from the launch shaft to the target shaft.

3. Brightway Slurry Separation System is essential in different soil with different ground water levels. In the cutter head, the excavated spoil is mixed with water and then transported to the surface, where water and spoil are separated by the separation plant and the clean water then remains in the slurry circle.
Brightway unique separation plant can operate in different models depending on the ground condition.

4.Lastly, once the string of pipes are done, the crane will then, remove the cutter head from the manhole pit at the target shaft, and replace the gap with a connecting pipe inside. Both manhole pits will be sealed with cement seamlessly.

Slurry treatment system

Slurry treatment system

 

Pipe Jacking

Brightway provide the full range of slurry separation plant for pipe jacking project.

  • What is pipe jacking?

From the below picture, let’s know pipe jacking briefly.

pipe jacking layout

pipe jacking layout

1. The virgin ground is being excavated to create a manhole pit, and the hydraulic jack is placed at a strategic spot. The size and depth of the manhole pit varies, depending on the specification requirements.
2. The pipes strings are stringed together piece by peice using the hydraulic jacking machine. Each unit of pipe are being lifted down into the manhole pit by a crane. The jacking of pipes towars the destined direction is done from the launch shaft to the target shaft.
3.Lastly, once the string of pipes are done, the crane will then, remove the cutter head froom the manhole pit at the target shaft, and replace the gap with a connecting pipe inside. Both manhole pits will be sealed with cement seamlessly.

slurry separation plant

slurry separation plant

The technology used to separate and remove undesirable materials from a fluid

– Maximize drilled/excavated solids removal

– Minimize fluid lost with the discarded cuttings

– Minimize commercial solids lost with cuttings ƒ Maintain fluid properties for a clean, healthy slurry ƒ

The result is lower mud cost and manageable waste volume for efficient control of well costs.

IMPACT OF DRILL SOLIDS (CONTAMINANTS). ƒ

Increased hydrostatic head ƒ Interference with bit/formation interface ƒ Increase viscosity causing:

– Reduced efficiency of all SCE Coarser screens use Hindrance of accelerated settling (stokes law)

– Higher chemical and dilution costs – Higher disposal costs

ƒ Excess abrasion affects:

– Pumps and expendables

– SCE equipment Screens and screen supports/ Hydrocyclones Centrifuge rotating assembly

– Slurry separation plant drill bits

– Piping

ƒ Increase tunneling operating costs

Herrenknecht Separation Plant

Herrenknecht is a respectable enterprise.

I am lucky to join the 2016 Bauma Exhibation on Apr 11-17, 2016, and have a close contact with Herrenknecht culture, people and product.

As the slurry separation plant manufacturer, always pay great attention to the leaders in this industry worldwide.  Here is demo of Herrenknecht typical separation plant design.

Slurry separation plant

Slurry separation plant

slurry separation plant

slurry separation plant

To know the separation plant  processing flow, the below diagram for your reference.

Herrenknecht separation plant flow chart

Herrenknecht separation plant flow chart

The slurry from the discharge pump goes to the coarse screen firstly, then go to the 1st compartment of the tank, the 1st gravel pump takes the slurry from the 1st compartment to the desander for further separation with the cut point reaching 60 um, and the cleaner fluids goes to the 2nd tank compartment. The 2nd gravel pump has the slurry go to the desilter processing from the 2nd compartment, reaching the cut point 20 um, and the cleaner fluids go to the 3rd compartment, which can be used for the pipe jacking machine by the charging pump.

 

Brightway Separation Plant Flowchart

For the well-known brands in the slurry separation plant industry-Schauenburg, Herrenknecht, Bauer, etc, they are the respectable manufacturer.

Brightway is the growing company in the separation plant industry for the micro-tunneling( pipe-jacking) and TBM( Tunneling Bore Machine) projects, and I’d like to introduce our processing flow of Brightway separation plant as below.

Separation Plant Operation Flowchart

Separation Plant Operation Flowchart

Slurry charged with soil is conveyed to the plant through the supply line (1) and let out onto a vibrating coarse sieve (2) which removes particles exceeding 5 mm in size.
The sieved slurry processed by the second fine shaker and drops into a trough and passes through a pipe into the main reservoir (3) of the desanding module from where it is pumped (4) to the two main cyclones (5) which separate out sand from the slurry.

The sand pours out through the underflow outlets (6) of the cyclones and drops onto a vibrating fine sieve to be dewatered and removed (7) from the process.

The treated slurry leaving the cyclones through the overflow outlets pours into an intermediate tank (8) from where it passes to a storage tank (9).

A further refinement of the slurry can be achieved by pumping (10) already

Brightway Slurry Separation Plant

Brightway Slurry Separation Plant

I will update the processing flow of Herrenknecht , Bauer, Schauenburg in the follow weeks.