Design features and manufacturing technology of foundations on TISE piles

Literally speaking, foundations are the cornerstone of any construction project. In situations where the soil is expansive or unstable, conventional foundation techniques might not be adequate. Here’s where TISE (Twin Interlocking Sheet Pile) foundations come in handy, providing sturdy fixes for difficult ground situations.

TISE piles are specifically made to offer structural stability in regions where soil movement is common or where traditional foundations find it difficult to remain intact. Their special interlocking sheet pile design minimizes soil displacement during installation and enables effective load transfer.

To guarantee strength and uniformity, TISE piles are manufactured using precision engineering. These piles are manufactured to precise specifications and specifically designed to withstand the unique demands of the project site. They are usually constructed from sturdy materials like steel or reinforced concrete.

Soil analysis and site assessment are the first steps in the rigorous process that goes into installing TISE piles. This initial stage assists engineers in figuring out the ideal pile configuration and depth needed to properly support the intended structure.

Design Features	Manufacturing Technology
TISE piles are designed to expand at the base, creating a wider footing for better load distribution.	Begin by drilling a hole with a special TISE drill, ensuring the diameter matches the pile"s base.
They reduce the risk of foundation settlement due to their increased surface area at the bottom.	Insert a reinforcing cage into the drilled hole for added strength.
These piles are well-suited for various soil types, including clay and sand.	Pour concrete into the hole, ensuring it fills the expanded base and entire shaft.
TISE foundations are more cost-effective compared to traditional methods due to less concrete usage.	Allow the concrete to cure properly before applying any load or starting construction on top.
They offer high stability even in seismic regions due to the broader base.	Ensure proper alignment and spacing between piles for optimal support and load distribution.

What it is?

A new technology that emerged in the latter part of the 20th century and is now extensively utilized worldwide is the laying of pile-tape foundations. A reinforced concrete grillage is built on bored pillars with an expanded heel, which distinguishes this type of foundation from a traditional one.

The wider lower section removes the possibility of frost heaving forces lifting the load-bearing structure, and the increased supporting area makes the foundation resistant to heavier loads.

Load bearing capacity

The diameter of the pile bases, soil composition, and resistance all affect the foundation’s ability to support loads:

Soil type	Soil resistance, kg/m2	Load-bearing capacity of the load-bearing structure depending on the diameter of the heel, t
		50 cm	60 cm
clay, coarse sand	6	12	17
loam, sandy loam	3	6	8
dusty sand	2	4	5.5
medium sand	5	10	14

In actuality, the TISE foundation’s load-bearing capacity may be two times greater because cement laitance seeps into the ground and solidifies there, creating a 5-7 cm thick layer of soil concrete.

How a pile foundation is made?

The first step in design is gathering baseline data from soil geological surveys. The foundation is then calculated, taking into account the pitch between the supports, the structural elements’ parameters, and the amount of building materials required.

Marking the pile field using the conventional method is the first step in field work. Wells are then drilled to the intended depth. One by one, the extensions are made: an Ø500 mm recess is first created, after which the blades are straightened to their final position and the extensions are increased to their greatest length.

The completed fresh material is inserted into a reinforced frame, and concrete mortar is then poured into the structure. Following the hardening of the support, the conventional method of building a reinforced concrete grillage in the shape of a monolithic strip is followed. In this instance, the lower plane of the grillage and the ground surface should be separated by a distance of 30 to 45 cm.

You can save even more money by using your own hands to complete the TISE foundation construction instead of specialized equipment.

Turnkey laying price

If the owner does not have construction experience or technological understanding, they should get in touch with experts. The table shows the average market prices for services:

Parameters of the power structure with grillage parameters: width 40 cm, height 60 cm			Cost of one pile, rubles.	Price, rubles./running meter.	Cost of a foundation with an area of ​​6×6 m
Ø support, mm	Ø heel, mm	Depth, m
250	600	1.5	3–4 thousand.	4–5.5 thousand.	150–200 thousand.
200	500	1.5	2.8–3.5 thousand.	4–5.5 thousand.	120–170 thousand.

Scope and service life

Because TISE piles are universal power structures, they are frequently utilized in construction.

In these kinds of circumstances, the technology is particularly useful:

• during the construction of concrete and brick fences;
• for low-rise construction made of heavy materials;
• during the construction of two- and three-story residential buildings made of timber, foam concrete and frame panels;
• during the construction of bathhouses and other heavy structures.

With the exception of rocks, TISE piles can be constructed in clay, sandy soil, sandy loam, loess, and loam. The popularity of this technology is determined by the fact that 90% of the Russian regions are covered by the soil types listed.

Because of their design, piles near highways and railroads are unable to transfer vibrations and dynamic loads to the structure they support.

If construction is done strictly in accordance with technology and the structure’s operating load does not exceed its design value, the service life of a TISE pile-grillage foundation can exceed a century.

DIY base installation

We begin by gathering information from hydrogeological survey findings, and then we calculate the foundation so that we can choose the best structural element parameters. Now that you have the project and the drawings, you can start building.

Material calculation

Knowing the total weight of the house and the load-bearing capacity of one support will help you determine whether piles are necessary. The following parameters make up the load from the structure:

1. Weights of walls, partitions, ceilings, roofs and extensions.
2. Payload, taking into account the mass of people, interior items and heavy equipment (the value is assumed to be 150–180 kg per m2 of all floor area).
3. Snow cover mass (average value for the region, equal to 100–300 kg per m2 of roof).

The value obtained is divided by one pile’s load capacity and multiplied by the safety factor (1.1–1.4). The necessary number of piles is found in this manner. The pitch is determined by dividing the total number of supporting elements by the perimeter of the structure. SNiP states that the step should be between 1.5 and 2.5 meters. Starting from the corners, the support placement points are sketched along the contour of the drawing.

The foundation depth (based on the findings of geological research) should be 20–30 cm below the freezing level of the soil. TISE technology states that there should be a 30- to 45-centimeter gap between the grillage and ground level (depending on the amount of precipitation and the degree of frost heaving of the soil). Based on this gap—the size of the supporting element’s immersion into the grillage body—the height of the piles is computed, adding at least 10 centimeters.

The width of the grillage is chosen to match the diameter of the piles, which it may overhang by up to 10 cm, but not less than the thickness of the load-bearing walls. Keeping in mind the local climate, the height of the grillage is selected to be between 30 and 60 cm.

The entire volume of the foundation must be calculated to determine whether concrete is required. Divide the power structure into manageable chunks to accomplish this. Here is the formula to find the volume of one support:

Where 10% serves as the heel reserve and H and R represent the pile’s height and radius, respectively.

Multiplying the height by the supporting area yields the volume of one side of the grillage. After adding a reserve of five to seven percent, the obtained values are totaled.

Difficulties in drilling

A hand drill or a specialized installation (rent from 1,500 rubles/knocks) can be used to develop wells. Create shallow pits first, then fill them with water and use a metal rod as a bayonet if the soil is dry and compacted. When drilling, you can raise the handle’s shoulder to exert less force.

A crowbar must be used to loosen and remove stones larger than 5 cm. Big rocks are left in place, but the pit is covered up, and a new well is dug out close to the design point.

Collapse of the walls is another issue that can occur when working with dry soil. In this instance, the pit is wetted with water, which compacts the soil and helps it maintain its shape.

How to create an extension?

In order to construct an expansion device at the bottom of the well, utilize a drill that has a plow that can be adjusted to two different positions, 50 and 60 cm. As it accumulates, exhausted soil is taken out of the soil receptacle.

The plow moves in a clockwise direction without exerting any vertical force in order to avoid overly deepening the hole.

You will need additional tools when working with high-density soil, such as a rod with a curved end for breaking up solid earth layers. For this, a hoe or flat cutter work well as well.

Because of the already high bearing capacity under these geological conditions, the heel’s diameter can be decreased.

Reinforcement and pouring concrete

In order to give the structure rigidity, a reinforced frame needs to be inserted into the well before concrete is poured. The reinforcing bars that are visible above the surface will be utilized in the following stage of construction to firmly join the supports and grillage.

Pouring requires the use of concrete with a strength of M250–300. After pouring the heel, a formwork consisting of sheet roofing material rolled into a pipe is inserted into the well. The formwork should extend above the ground to a height equivalent to the value of the supporting elements’ above-ground portion.

To ensure that the walls of the pipe do not separate under the pressure of the solution, the circle in the upper section is secured with wire, and the structure is fortified with crushed stone.

Pouring concrete through the sleeve is convenient. Air bubbles and voids in the heel area, which are frequently created with this technology, are removed by bayoneting the solution once half the volume of the formwork has been filled with concrete. Next, flush the solution into the casing pipe.

TISE pile foundations are a key innovation in the field of contemporary construction, combining strong design with effective manufacturing methods. These foundations provide greater load-bearing capacity and stability by utilizing the strength of TISE (threaded and injected steel elements) piles. The strategic design considerations and streamlined manufacturing processes that are essential to building such foundations are examined in this article. It seeks to provide engineers and builders with crucial knowledge about how to use TISE pile technology for durable and sustainable building projects by exploring these facets. Tell me if this meets your needs or if you require any modifications!

Concrete structure care

Maintaining a concrete structure is essential to reducing plastic shrinkage, protecting it from drying out too soon, and preventing abrupt temperature changes from rupturing structural bonds.

For this, a film is placed on top of a moistened compress of sawdust that has been created on the surface of the concrete solution. The protective layer is re-covered in polyethylene and watered with water from a watering can (drip irrigation) once every three days.

Concrete needs to be forced heated during the winter months using polystyrene foam or mineral wool. Antifreeze modifiers are occasionally added to the solution during mixing specifically for this purpose.

Construction of the grillage starts in accordance with standard procedure for a pile foundation with reinforced concrete strip after the concrete reaches the required strength.

Reviews from private builders

A controlled series of technological operations is necessary for any construction technology. Inexperienced builders sometimes make mistakes because they don’t consider all the requirements, which leads to the premature destruction of the foundation and the structure as a whole.

Common errors made when building a TISE foundation include:

1. Shallow grillage on a sand cushion in rocky soil conditions. On the one hand, the drainage layer must protect the base from vertical loads. But the soil, under the influence of heaving forces, will one way or another expand and put pressure on the grillage through the incompressible sand cushion. The widened heel at the bottom of the base, in turn, will not allow the supports to rise, resulting in a rupture of the trunk. For this purpose, one should adhere to TISE technology and erect a grillage at a certain height above ground level.
2. Filling the well at one time, which leads to the formation of voids in the lower part of the foundation. In the process, groundwater seeps into the voids, which destroys the foundation and reduces its bearing capacity. To prevent this from happening, concrete is poured in portions, each time bayoneted with a rod to remove air bubbles.
3. Refusal of a reinforcing frame for piles leads not only to a decrease in the strength of the load-bearing structure, but also to a possible rupture at the junction of the supporting elements with the grillage. To reinforce the piles, corrugated steel rods with a diameter of 14–16 mm are used. The load-bearing structure must be connected by transverse rods with the same pitch. Longitudinal rods will later be used to rigidly connect the upper and lower parts of the foundation.

You can learn more about what else a breach of foundation laying technology can accomplish by visiting the forum and searching for "TISE pile construction." The participants in the discussion "Reviews of those who built the foundation using TISE technology" determine whether it is worthwhile to take on the construction of a load-bearing structure despite having little experience with foundation construction.

This site contains all of the information you require regarding the layout and building of a pile foundation.

Video on the topic of the article

In the video, technology for setting foundations on TISE piles is demonstrated.

TISE pile-supported foundations combine efficiency with environmental considerations to provide a reliable solution for a range of construction needs. These foundations are made to disperse structural loads uniformly, guaranteeing the longevity and stability of buildings. Construction projects can lessen their impact on the surrounding soil and cut down on the amount of extensive excavation required by using TISE piles.

TISE pile foundations are manufactured using precise engineering and installation. In order to create a stable foundation that supports the structure above, piles are driven into the ground to predetermined depths. This approach reduces construction site disturbance and expedites construction schedules, making it the method of choice for projects needing dependable performance and quick deployment.

TISE pile foundations’ ability to adapt to different soil conditions is one of their noteworthy design features. Engineers can customize pile specifications to maximize load-bearing capacity and guarantee structural integrity, regardless of the type of material—soft clay or dense gravel. Because of their adaptability, TISE piles can be used in a variety of construction settings, including both residential and commercial buildings.

To sum up, TISE pile foundations are a progressive solution to the issues facing contemporary building. Their creative design and effective manufacturing methods make them the perfect option for builders who want to increase the sustainability and efficiency of their projects. Construction professionals can support both structural integrity and environmental stewardship by making informed decisions based on their understanding of the distinct advantages of TISE piles.

Video on the topic

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Calculation of the foundation using the example of TISE piles. Priming. Armature. # We are building a reinforced concrete house

House built according to TISE, completion after 11 years of operation.

TISE piles for RUR 15,000. In 2 days for 72 sq. Why a foundation made of TISE piles is the best solution?

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TISE piles. Load-bearing capacity and design features