PT Tohoma Mandiri - Assembling Innovation

PT Tohoma Mandiri's success in the Palembang B2B IPAL Project

The Palembang City B2B WWTP project was built with the aim of reducing waste water pollution while improving the health quality of Palembang City residents. PT Tohoma Mandiri as one of the sub-contractors for this project also succeeded in completing the scope of work with a final span of 81m using the DN1000 jacking pipe method.

Despite of the challenges that exist, we always prioritize work health and safety, and ensure that the project we work on the carried out optimally by our professionals team in this field so as to achieve the best results. This reflects PT Tohoma Mandiri’s commitment to quality results and good perfomance.

PT Tohoma Mandiri succed making a breakthrought at WWTP B1 Makassar Project

PT Tohoma Mandiri succeeded in making a breakthrough on the Makassar B1 Wastewater Treatment Plant Project, Makassar City Main Wastewater Channel Work Package. The length of the span that we succeeded in working from the Departure Inlet Chamber to Arrival MH10347 was 87.48 meters using the jacking method.

This project has been running with PT. PP (Housing Development) – Memiontec (KSO) as Main Contractor, and PT Tohoma Mandiri as Sub Contractor for the DN1000mm microtunneling work. With the support of a team that is skilled and experienced in their field, PT Tohoma Mandiri is determined to make occupational health and safety a top priority, while ensuring that every project we carry out is carried out with full dedication to achieve optimal results.

PUPR Minister's visit to the IPAL B1 Makassar Project

Minister of Public Works and Public Housing (PUPR) Basuki Hadimuljono accompanied by the Mayor of Makassar Muhammad Ramdhan Pomanto visited the Wastewater Treatment Plant B1 installation project in Makassar on July 27 2023. This project has been running together with PT. PP (Housing Development) as Main Contractor.

During this visit, the Minister of PUPR conducted a review of the Centralized Domestic Wastewater Management System in the Metropolitan Sanitation Management Investment Project (MSMIP) program. This program aims to improve wastewater services in urban areas.

PT Tohoma Mandiri as one of the sub-contractors in the WWTP B1 Makassar project is working on a wastewater pipeline network construction project using the jacking microtunneling method. In addition, we always prioritize occupational health and safety, and ensure that the projects we work on are carried out optimally because they are carried out by our team of professionals in this field so as to achieve the best results.

WWTP B1 Makassar Project Package for Makassar City's Main Waste Water Channel

PT Tohoma Mandiri became one of the sub-contractors in the Makassar B1 Waste Water Treatment Installation Project, the Makassar City Main Wastewater Channel Work Package. This project has been running with PT. PP (Housing Development) – Memiontec (KSO) as Main Contractor.

The scope of our work is to install wastewater treatment using the microtunneling jacking method, which began with the installation of the first DN1000mm pipe on July 6, 2023. Together with a team that is professional and experienced in their field, PT Tohoma Mandiri is committed to prioritizing occupational health and safety, and ensuring that the projects we work on are carried out optimally so as to achieve the best results.

Microtunneling Method Makes Projects Smooth Without Traffic Disruption or Infrastructure Damage

Microtunneling or the process of building tunnels using a drilling machine (Microtunnel Boring Machines, MTBM) combined with jacking pipe techniques to install pipes underground in one driving. This process is carried out with the aim of avoiding open excavation.

In other methods, it often causes congestion because it requires diverting traffic lanes. However, Microtunneling operates underground and does not disrupt with traffic areas, so it does not cause congestion or noise problems. By involving the use of a remote controlled drilling machine, Mictotunneling does not require large trenches or open pits there by helping to maintain vegetation around the project area.

From the factors described above, the microtunneling jacking method is the right solution for projects in areas with dense population and traffic. PT Tohoma Mandiri has a team of professionals who are experts in the field of microtunneling, with extensive experience and expertise. Get the best work with us as a reliable partner in efficient microtunneling solutions to meet your project needs.

The Microtunneling of DN1000 work on the MH4007 - MH4006 span has been completed by PT Tohoma Mandiri in the IPAL (Wastewater Treatment) Project in Palembang City.

The Microtunneling of DN1000 work using the jacking method at this time is the longest span in the Palembang B2B WWTP work with a length of 143 m. Our team managed to achieve an average production progress of 12m/day with a maximum achievement of 16m/day.

The trace that we are working on does not experience significant geological obstacles, this is supported by the results of the analysis carried out by the geolytic team which shows similarities to the previous spans and traces that we have successfully worked on. As a result of good perfomance and proper supervision, the project is running well and achieving optimal results.

We have Succesfully Completed Jacking Pipe at the IPAL (Wastewater Treatment) Palembang Work with 104.910 span length

The microtunneling work on this route is special, where the drilling route passes under the Ampera Bridge, the Terminal. the Main Market and also the Palembang City LRT Overpass.The area is a critical area and crowded populated. As for the extra challenges that we have to face in this project, we need to drill in dense areas without affecting the surrounding environment such as traffic jams or technical problems in public facilities. Beside the existing of challenges, our team managed to carry out the project in a professional work with the best result.

Doing such a prominent project is pushing our team to give the best skill and science considering its safety and quality. Thus we are supported by precise information regarding geologist soil structure clearly provided by responsible parties. During this stage we expedite the jacking process, targeting 11.62 meter per day and proudly able to achieve 16.00 meter as the best result. There are some soil types that we have faced on this area such as clay, sandy soil, and silt.

Visiting by Management of PT Adhi Karya Head Office to the Pekanbaru City North Zone Wastewater Pipeline Development Project

PT Tohoma Mandiri is the sub-contractor of Adhi – Jaya Construction which has been working on the North Zone Wastewater Pipeline Development Project since the end of 2021 in Pekanbaru City. This project uses the Jacking Pipe – Microtunneling System method using a drilling machine (Microtunnel Boring Machines, MTBM) and is combined with hydraulic engineering from the departure shaft to the arrival shaft in (one drive).

PT Adhi Karya visited and reviewed the progress of the project being carried out by PT Tohoma Mandiri as a Sub-Contractor for the installation of 1000mm diameter RCP pipes. This visit began with a safety briefing before entering the MH-106 pit/shaft area, in accordance with the project’s K3 SOP.

Next, the Adhi Karya team entered the pit area and received an explanation of the progress of the work from the Project Manager of PT Tohoma Mandiri. They were immediately guided by the Tohoma team to go to the control room area, shaft area, and slurry system area. This work technique is very safe and environmentally friendly because it is done without open excavation so it does not damage the ground surface facilities for laying pipes with a depth of +/- 10 meters from the surface. Excavation is carried out from the control room by experienced Tohoma operators.

PT TOHOMA MANDIRI Invests in New Drilling Machines to Strengthen Operational Lines.

Looking at how infrastructure progress in Indonesia has impacted the increase in demand for infrastructure services. In this situation, PT Tohoma Mandiri invested by buying a new drilling machine from a well-known construction company in Germany, Herrenknitch. This aims to strengthen PT Tohoma Mandiri’s operational line to fulfil the demand for Microtunneling System – Pipe Jacking infrastructure services. A synopsis about Tunneling is an innovation of installing underground pipes without open excavation but using a drill machine that is controlled remotely, so it doesn’t impact traffic jams.

This new drilling machine is directly used to construct Pekanbaru’s northern zone wastewater pipeline infrastructure. Hopefully, this new drilling machine will continue to assist Indonesia’s infrastructure progress in the waterways system.

Large-scale construction does require some special techniques. One such technique is the jacking method. In Indonesia, major developments often occur, such as the construction of toll roads. In principle, this method involves driving the pipe underground by drilling, then pushing the pipe using hydraulic pressure. For a complete explanation, please refer to the following discussion.

What is the Pipe Jacking Method

Pipe jacking is no stranger to construction, especially in Indonesia because it has been used frequently. One of the purposes of using pipe jacking is to allow sewage to flow through the concrete pipes under the road. Thus, the potential for environmental pollution by this waste can be minimized and can prevent flooding.

Read : Pengertian, Fungsi, Kelebihan, dan Kekurangan Microtunneling

Therefore, this method is often used in urban areas because the water catchment area is quite minimal, especially to collect rainwater. Lack of green land is one of the factors that floods often occur. From these problems, the use of underground pipes is considered quite effective. What’s more, the pipe installation process also does not require open excavation so it is safe in traffic.

Main Factors of Pipe Jacking Method

1. Total population

The population is one of the most important factors to consider before starting pipe jacking. This is because the more people there are, the greater the supply of waste will be generated so that it can be taken into consideration before installing pipes.

2. Regional conditions

Considering that Indonesia has various characters from a geological perspective, this must also be considered. It is possible that in that place the soil conditions are less stable so if a pipe is installed it will be quite vulnerable. In addition, before drilling, it must also go through a licensing process first.

3. Conditions of environmental sanitation

In general, sanitation in urban areas is less than in rural areas. This sanitary condition will have a significant influence on how the pipes are installed so as to minimize various health and environmental risks.

4. Climate

The final consideration is climate. Although this method does not require open excavation, it does have some effect in some weather conditions. For example, when the rainy season arrives, it often rains heavily accompanied by wind, making it impossible to drill in order to avoid unwanted things.

Advantages of the Jacking Method

There are quite a number of advantages of using pipe jacking compared to other methods. These advantages include minimizing extreme environmental disturbances, safer installation, reducing business activities, especially in densely populated areas, comfortable living, no open excavations, and many more. Because of these considerations various developed countries have often used it in development.

That was a little discussion about the pipe jacking method in terms of construction. However, one thing to note is when you want to use this method, make sure to choose a trusted service such as Tohoma Mandiri. Having been established since 2005 is proof that this service has indeed proven its quality. For more information, you can visit