soil classification

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The key is to know what to look for so that you can anticipate the dangers that may be associated.

Shoring services in st Louis

When it comes to the construction industry, there are very few things that are as hazardous as trenching and shoring. Trenching and shoring are ways that the construction business uses to make the structural integrity of building sites and structures stronger and safer for employees to work on or around. The problem is that you can’t always anticipate all the conditions that can wreak havoc on a job site, especially when it comes to the weather.

Winter is one of the worst times for construction trenching. With a combination of frozen ground and precipitation, there are always conditions that must be accommodated. If they aren’t, then it can put a real hazard on your work site. Being able to compensate for weather conditions is imperative to keeping everyone working on a trenching and shoring site safe and injury-free. The key is to know what to look for so that you can anticipate the dangers that may be associated.

Soil Conditions and How they Create Instability

One of the biggest factors in ensuring a safe trenching or shoring site is the condition of the soil that you are working with. If the soil is riddled with extra water, then you are going to be fighting a losing battle trying to keep things structurally sound. Heavy rains will be the number-one enemy of safety. That is why, if you see any signs of the soil heaving, cracking, settling or boiling, then it is time to shut the operation down and find a way to compensate for the additional water instead of trying to work through it.

What Should you Do if you Notice Soil Problems?

Once you notice that there is a problem with soil conditions, they need to be addressed immediately. There are ways to pump water from a site to make it sounder. You can also use protective systems to either dig deeper or to excavate a wider area to compensate for the weather conditions. The key is to identify the signs of water problems and to find a way to solve them, instead of just pushing through and hoping that they will take care of themselves.

If you find that water is a problem, then you can use different methods of benching, shoring, or sloping, depending on what the issue is. It’s essential to have an engineer or management professional who not only can identify when your trenching operation is jeopardized by excess water, but also knows how to address it so that your workers are safe.

Trenching is one of the most dangerous parts of any construction site, because the integrity of the work site is compromised to begin with. To ensure that you are compensating for weather conditions, make sure to hire the right professional so they can not only identify when things need alterations, but also find the right way to fix the problem before a hazard exists. The smallest water or weather issue can take down your entire operation, slow down your timeline, or put your personnel at risk.

Experts in trench shoring and excavation projects. Call Luby Shoring Services at (636) 660-7467 or fill out our online contact form.

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Knowing what they are and how to evaluate and accommodate for them are critical to keeping workers safe.

Trenching St. Louis

Trenching is one of the most dangerous practices that you can engage in within the construction industry. Trenching is a way to build a structure to ensure the integrity of a worksite that may not be stable. There are many things that you have to take into consideration when devising the best trenching practices. One that might seem like the most benign, but it’s one of the most critical: being able to evaluate and accommodate various types of soil conditions.

Since your trench will rely on how well it holds up the surface around the worksite, things like soil type, the moisture that it retains, and the type of composition it contains should all help to determine the best way to shore things up to keep everyone safe.

There are many stresses that can be placed on the soil at a trenching site. Knowing what they are and how to evaluate and accommodate for them are critical to building the safest trenching operation possible.

Stable Rock

Stable rock soil conditions exist when there is natural mineral matter that can be extracted with both sides exposed. Examples of stable rock are sandstone and granite. Although it’s more difficult to crack, once you have a trenching site comprised of stable rock you have more stability, and it is impervious to weather conditions and cracks.

Type A Soils

Type A soils are unconfined and have a compressive strength of 1.5 tons per square foot or more. Things like clay, clay loam, sandy clay, or silty clay are examples of type A soil. It’s not impervious to water conditions, so weather and running water need to be accommodated for when trenching in type A soils.

Type B Soils

Type B soils are unconfined and have a strength of more than 0.5 but less than 1.5 per square foot. Examples of type B soils are silt loam and angular gravel. As they are more unstable than other types of soil, water and weather conditions definitely need to be factored in for safety.

Type C Soils

Type C soils are unconfined soils that have the strength of less than 0.5 per square foot or less. They are gradual in nature and pose the biggest threat of danger in a trenching site. They are the most unstable, so if you are trenching in type C soils you will need to either dig deeper, slope horizontally or vertically, and anticipate weather or water changes.

Layered Geological Strata

If you are dealing with soil that is geologically altered, then you have to take into account the various levels of soil and accommodate accordingly. Dealing with layered geological strata creates a highly complex trenching site, and there are many conditions to consider.

St. Louis Trench Shoring

Trenching is an extremely dangerous part of the construction industry and it’s heavily guided by the conditions that surround the work site. Chief among those concerns are the type of soil and how weather and other conditions will affect its integrity. If you are designing a trenching operation, it is imperative to get the help of a professional St. Louis trenching and shoring professional to ensure that you are taking soil and all other things into consideration.

Call Luby Shoring Services at (636) 660-7467 or fill out our online contact form.

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Before undertaking any excavation work, it is important to assess and classify the soil.

st louis trench shoring

A construction project may require an excavation at the site. Before taking up any excavation work, it is important to assess and classify the soil in order to ensure the safety of the workers.

Classification of The Soil

Structural Classification – The first step in evaluating the soil involves a structural classification of the soil on the site. Soil may be granular, granular cohesionless or cohesive in nature. The granular soil has 15% of clay and silt while cohesive soil has less than 15% of clay or silt.

Type Classifications – After categorizing the soil on its structural basis it may be classified according to its type. This helps the engineers to understand the plasticity of the soil and
determine the structural support to be used.

Types Of Soils

Type A – This soil is very stable. It has to be sloped at an angle of 53 degrees or 3/4:1 ratio. That means in an excavation the sides should slope back 3/4 foot for every 1-foot depth. It is cohesive. It is unconfined compressive strength is 1.5 tsf (tons per square foot) or more. This type of soil can be benched to provide protection to the workers. For this, a stair-step is created. The soil rises vertically from the base up to 5 feet and extends 4 feet horizontally forming angles of 90 degrees on the sides. It is repeated till the top.

Clay, sandy clay, clay loam and silty clay are some examples of this type of soil.

Type B – It is less stable compared to Type A. It is very cohesive. It’s unconfined compressive strength is between 0.5 to 1.5 tsf. It has to be sloped at an angle of 45 degrees or 1:1 ratio. In an excavation after a depth of 1 foot, the sides should be sloping back 1 foot. This type of soil can be benched, vertically rising 4 feet from the bottom and extending 4 feet
horizontally forming angles of 90 degrees on the sides. This can be repeated till the top.

This type of soil includes granular non-cohesive soils like angular gravel, silt loam, silt, sandy loam, disturbed soil which is not categorized as Type C, soil which is subject to vibration or is fissured but has the unconfined compressive strength like Type A, and dry rock which is not stable.

Type C – This is the most dangerous type of soil. It has minimum stability compared to the others. It should be sloped at an angle of 34 degrees or 1-1/2:1 ratio. The angle may have to be increased depending on the water seepage or saturation. This type of soil is cohesive. It’s unconfined compressive strength is 0.5 tsf or less. Benching should not be done for Type C soil.

Granular soils like sand, gravel, loamy sand, soil from which the water seeps freely, the submerged rock which is not stable and submerged soil are included in this category.

Call Luby Shoring Services today at (636) 660-7467.

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