Trenchless sewer repair in Los Angeles is considered a new technology, but this is an exaggeration. Any method that leads to significant changes in the market becomes relatively new during the time of entering this market – without digging trenches, pipelines were changed in the last century.
Among the advantages of the trenchless sewer repair in Los Angeles are the absence of earthworks and the inviolability of the landscape. In some cases, this is not entirely true – pits are necessary if there are no sewer wells nearby. However, two dug wells cannot be compared with a trench. Time consuming, messy process of replacing sewer pipes in the traditional way with digging trenches
There are two methods of trenchless sewer repair in Los Angeles – sanitation and rupture. The rupture of the old pipe is exactly the replacement. Sanitation – repair of a pipeline, although in the end they get a completely new pipe inside the old one.
Technology Of Trenchless Replacement of Sewer Pipes
The essence of the technology is the replacement of old cast-iron, asbestos-cement, ceramic, concrete, that is, made of a relatively fragile material, sewer pipes by breaking them and then pulling a new pipe into the resulting cavity.
Since the end of the last century, the method has been actively improved, and today even metal pipes are being changed in this way.
Replacing The Pipeline with An Increase in The Diameter of The Pipes
The module of the new pipe is attached to the expander (the structure is prefabricated, the connection is threaded, the length of the segments depends on the diameter of the well). The working element, consisting of a pneumatic hammer and expander, moving along the old pipeline, destroys the walls, ramps the fragments into the ground, expands the cavity to the required diameter.
The new plastic pipe is pulled into the cavity, increasing in length as the expander advances. The reactive forces of the pneumatic hammer and the elastic action of the soil are absorbed by the traction cable. Through the deflecting anchor, the cable is led into the outlet well, where it is wound around the winch.
The equipment of trenchless sewer repair in Los Angeles is powered by a mobile compressor. If there are two sewer wells in the desired area, excavation is not required. If there are no wells, you will have to dig them out.
Equipment For Trenchless Pipe Replacement
For trenchless sewer repair in Los Angeles, a set of equipment is used, consisting of:
- Pneumatic hammer – a compact machine made taking into account placement in a sewer well
- Expander – an executive device consisting of a guide, destructive cone, expansion sleeve
- Pneumatic winches
- Deflecting anchor
- Hoses that conduct air
- Traction and safety rope
The package also includes tools for equipment maintenance and pipe installation.
Advantages Of Trenchless Replacement of Sewer Pipes
The first obvious benefit of trenchless sewer repair in Los Angeles is speed:
- On complex clay soils – from 0.5 to 0.6 m / h;
- On sandy and sandy loam – from 20 to 25 m3 / hour.
No shovels can dig a 20-meter trench 2-meter deep in an hour. Strengthening the personnel will not help – the workers will simply knock with shovels, but they will not dig.
The second is the time to work: it is reduced not only due to the rate of penetration, but also due to the fact that the pipes do not need to be removed.
The third is the price. But it depends to a large extent on the equipment used by the contractor.
Repair of pipelines by trenchless method
Using a trenchless method, the inner surface of the pipes is cleaned of deposits, and the damaged sections of the pipeline are restored with a sleeve coating.
- Hydrodynamic
- Hydrocavitation
- Hydro-milling
- Shock and deformation
A television survey of the highway is preliminarily done. They use a color camera that provides comprehensive information about the condition of the pipes, including even small cracks and foreign objects. The robot determines the exact position of the defect and its nature. Based on the results of the study, a decision is made on the necessary measures – replacement of a section of the line or local repair.
Local repair: polymer sleeve “darned” through damage to the pipeline
Restoration Of Sewer Pipes with A Sleeve Cover
Applying the so-called stocking trenchless sewer repair in Los Angeles, the work of pipelines (regardless of cross-section) with a diameter of 150–1400 mm, including pressure pipelines (up to 10 atm), is restored. Eliminate various defects, in particular through damage.
At the same time, they provide protection against corrosion and the effects of abrasive particles present in the effluent. A special coating is introduced into the pipeline, and then it is subjected to heat treatment – a pipe is formed in a pipe. Scheme of installation of equipment for pipeline restoration by the hose method
The wall thickness of the polymer pipe formed inside the damaged pipeline is 8–24 mm. This sleeve fits snugly against the walls of the old pipe.
Cleaning and remediation of a section of the pressure pipeline requires the decommissioning of the system and the removal of shut-off valves. On free-flow pipelines, the repaired section is isolated with pneumatic plugs. If there are sewer wells on the territory, earthworks are not carried out. Otherwise, only two 3-meter square pits are dug.
The work is carried out in stages:
- Cleaning
- Examination
- Impregnation
- Sleeve insertion
- Sleeve polymerization
- Final examination
The sleeve consists of several layers:
- Sealing, retaining the binder and excluding the penetration of water into the adhesive.
- Absorbent and retaining plastic material.
- Reinforcing, accepting a tensile load in the process of eversion and performing the function of reinforcement in the process of further operation of the pipeline.
The sleeve is delivered to the place of work dry. It is introduced into the pipeline under pressure (hydrostatic column of water). After entering the sleeve, the water heating installation is started – for 8 hours it is continuously heated with 90-degree water circulating through the sleeve and the boiler. Under the influence of temperature, polymerization occurs, and the material forms a pipe – independent, capable of withstanding 10 atm.
Upon completion of the warm-up, the robot with a TV camera is started again – not only to get an idea of the result, but also to capture it on disk. This disc is then given to the customer as a visual demonstration of the quality of the hidden works. Everything takes a maximum of 5 days (provided that the repaired area does not exceed 200 m).
Old trenchless sewer repair in Los Angeles may seem beneficial due to the influence of stereotypes. In fact, they are more costly and time-consuming – it only seems that digging trenches will be cheaper. Only digging (disfiguring the territory at the same time) will take as much time as it will take for all the work on trenchless replacement of sewer pipes – as a result, it will be twice as expensive.
Trenchless sewerage
In construction, trenchless sewer repair in Los Angeles is carried out by puncturing the soil and is an economical method that saves time and money.
With this method of laying, the surface layer of the soil is not affected, which means that damage to the green zone and buildings is not caused. Due to the fact that drilling is permissible even from the basements of houses, trenchless installation is useful where the trench method is powerless.
Benefits Of Trenchless Line Laying
It is worth noting high-tech equipment, with the help of which high rates of cost reduction and efficiency are achieved. The equipment for ground penetration and HDD is capable of working all-season under any climatic conditions, even with hard rocks and icy ground.
We can say that modern “smart” machines have given the process of laying sewage in a trenchless way a civilized look. Now such events have become practically noiseless, do not spoil the landscape, and are hidden from human eyes.
For the sake of the process of laying pipes, it is no longer necessary to block roads, stop the movement of cars and trains, destroy the asphalt pavement, railway tracks and structures.
The undoubted advantages of trenchless sewerage installation are as follows:
- Trenchless sewer repair in Los Angeles allows to increase the pipe diameter and the laying speed.
- The terms of repairs, the amount of preparatory work, the number of personnel and the amount of required documentation are reduced.
- There is no need to carry out earthworks, damage city objects, restrict traffic on the roads.
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