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sinkholes-repair

Sinkhole Problems in North Kentucky

Sinkhole Problems in North Kentucky Are Hazardous

Northern Kentucky are experiencing sinkhole problems in which are threatening the safety and health conditions of residents. Due to the crumbling sewer lines, the sinkhole problem  has risen to high priority.

Mayors at North Kentucky have begun discussion for a possible solution that has caught its attention for public safety. The committed has determined all matters are one of public safety, therefore a plan of action to repair the streets will be given the approval to move forward. A-sinkhole-damage-repair

Currently, the resident of North Kentucky were responsible for repairs, nevertheless the repairing process hasn’t been a consistent one. The service for the maintenance had been suspended due to budget cuts. When maintenance was perform, it would cost the city about $600,000 annually. The problem has gotten so bad, that there isn’t any other way to cover them.

Milwaukee City Hall’s Foundation Repair

Milwaukee City Hall’s north side requires its foundation to be fixed, and the estimated cost is between $30 million to $40 million with an estimate dates of 2016 and 2017.

The figures are preliminary, and will likely change once foundation repair consultants define they project’s plans, according to Milwaukee Department of Public Works commissioner. Other phases of the projects are also expected.

The proposed plan was introduced to the Milwaukee’s Public Works Committee back in November 2014. One of the items that was also discussed was to let foundation-repairthe 119-year-old building’s wood foundation pilings continue to deteriorate. Since 1986,  City Hall settle up to 2 inches, which supports the bell tower. If the building’s foundation isn’t fix, it will continue to settle unevenly, which will eventually lead to the building leaning, which could possibly begin to split in other places, according to Milwaukee Department of Public Works commissioner

Since they soil is in mushy conditions, City Hall is on top of about 2,500 wood piles, which are placed in a submerged manner within water, so it can be preserved. But as water levels below City Hall have fluctuated, some pilings were exposed to air, got fungal rot and decayed, leading to the settling, said Kevin Johnson, Milwaukee’s owners representative on the foundation project.

The northern side of City Hall is in worst conditions, which has been place in first priority n the proposal that was submitted back in November 2014. In order to repair the foundation in City Hall, drilling of new foundation piers will have to be done that, through other work on the foundation, will acquire the load from the wood pilings. The wood pilings will remain in place with the propose plans. The plan is to keep City Hall open as normal, which the project’s noisy, and disruptive work will be done in the evenings after business hours, Johnson said.

The budget allocated for the foundation repair is set at $1.2 million in 2014 to begin engineering and other planning for the construction, which is to start in 2016 on City Hall’s northwestern corner. The northeastern corner will begin in 2017. A project timeline hasn’t been set yet for the repairs of the remaining sections of the building.

one-world-trade-center

One World Trade Center Time-Lapse Rocket Ride

Witnessing 515 years of history unfolding at the tip of Manhattan Island. That was the spectacular ride we have witness in a short 52 second video. When you ride the elevators to the observation deck of the Freedom Tower at 1 World Trade Center, the walls give you a time-lapse of the transformation of Manhattan.

An animated time lapse that recreates the development of New York City’s skyline, from the 1500s to today is located in the elevators to the observatory atop 1 World Trade Center.

Foundation Repair Methods

A quick online search for “foundation repair” reveals that there’s no shortage of foundation repair methods or companies proclaiming to do those repairs. In order to protect your investment, it’s important to understand the differing methods, their reliability, and make an informed decision regarding your home.

From Concrete to Steel

found its beginnings over 40 years ago in the use of concrete shoring pads to lift homes. Quickly, we found that the use of shallow piles was not a sufficient foundation repair method: adding more concrete to the footing of a home did nothing to stabilize the home long-term because the footings were still in shallow, shifting soil.

We’ve always been dedicated to research and development, employing in-house engineers. We began to learn more about the “Zone of Influence.” This refers to the area of soil that is affected seasonally by the water cycle—so shallow, shifting soil.

While we were able to achieve slightly more depth and a little more longevity by using concrete pressed piles, we still got consistent call-backs that foundations were shifting. Some companies use concrete shims today. This method provides a cheaper, short-term fix.
We knew we had to find a better, long-term foundation repair method.

The following is an examination of the four noteworthy techniques for establishment repair utilized as a part of Texas. While each has its preferences and its detriments, a one next to the other examination of Dawson’s Bell Bottom Pier technique plainly shows that it is the most solid approach to take care of a home establishment issue for all time. This technique is demonstrated and has been tried after some time. This is the same building idea used to assemble bolster sections for scaffolds and interstate bridges. What’s more, the accompanying connection will help you look at the genuine expense of establishment repair. When you get the actualities, you can be sure about your choice to trust Dawson Foundation Repair.

On the off chance that you might want a more specialized examination of each of the strategies for establishment repair, look at ADSC’s (The Association of Drilled Shaft Contractors) article Potential Heave in the Pressed Concrete and Pressed Steel Piles in Residential Foundation Construction which points of interest difficult issues with heaping techniques in the Dallas metroplex zone and how they can harm your home’s establishment – or investigate the finishes of PhD beneficiary Tom Witherspoon made in Load Capacity Testing and Analysis of Residential Underpinning Systems in Expansive Clay Environment.

Our Patented, Proven Foundation Repair Method

We resolved much of the issue when we began using hydraulically driven steel pilings. Due to the smaller diameter and higher compressive strength, the pilings could be pressed at up to 70,000 pounds of driving force.

With the introduction of a variable-length guide sleeve that prevented buckling of the pile, we finally had a foundation repair method that we could proudly put a lifetime warranty behind. With over 700,000 piles installed, we’ve had less than a 1% failure rate.

Our foundation repair methods and unique piling solutions provide the strength and stability that can only be found in the best American steel. The result is a lasting foundation and the peace of mind of knowing you’re on solid ground for the life of your home.

giant-sink-hole-siberia

Giant Sink Hole in Siberia Russia

giant-sink-hole-siberia-russiaGiant Sink Holes, measuring 260 feet wide in Siberia, Russia are likely caused by melting ice or permafrost, according toUniversity of Alaska geophysicist Vladimir Romanovsky. At first many speculated that those mysterious sink holes where cause by either extra terrestrials or military weapons testing.

One unique concept of the sink holes is that it actually erupted outside, tossing dirt around the rim.  Vladimir Romanovsky explains that natural gas could have caused pressure to build as the water collected in an underground cavity, and the dirt,  was eventually expelled.

The sink may be several years old, due to the face that there are plants around the crater, but in order to get an exact age, more analysis most be conducted. More sink holes may begin to appear, as the climate continues to change.giant-sink-hole-russia

 

FOUNDATION REPAIR METHODS

There are two general classes of foundation repair; deep, and shallow. Deep repairs, sometimes referred to as underpinning, mostly involve pushing or screwing steel piers into the ground to transfer the support and lift structural elements of a foundation. Shallow repairs can be used to address slab-on-grade foundations such as floating slab floors which have settled. Soil modification is a mid-depth repair typically performed in conjunction with shallow repairs.

Deep Repairs
Deep repairs are most frequently used for lifting concentrated loads, such as footings, and for bypassing unstable layers of soil which are causing recurrent problems with a foundation. Deep foundation repairs involve transferring the your foundation’s weight to a different layer of ground than it was originally built to sit on. We install two different types of deep foundation repair systems:

Helical Piers
Helical piers are screwed into the ground to transfer the weight of your foundation to a more stable layer of soil. The weight of the structure is transferred to the deep soil by the helices (rings) of the piers.

Push (Resistance) Piers
Push piers, also called resistance piers, are pushed into the ground against the weight of your foundation. Push piers are primarily designed to be end bearing, so they are pushed into the ground until the tip of the pier runs into a layer of soil hard enough to push against to lift the foundation. Push piers can either be eccentric (mounted on the side of a footing) or concentric (installed under the center of the foundation).

Shallow Repairs
Shallow repairs are best suited for lifting non-concentrated loads such as slab floors. Both shallow foundation repair processes we perform involve injecting material immediately under the foundation concrete to fill voids and raise the foundation as required. The least appreciated of foundation repair methods, shallow repairs are often much more economical and reliable than deep repairs for slab foundations. We perform two types of shallow foundation repairs:

Foam Jacking
Foam jacking is used to raise and support slab portions of foundations, such as interior floors. High density polyurethane is injected under the foundation, where it expands and pushes the foundation back into place. We utilize foam jacking in place of slab piers.

Slab Jacking
Slab jacking is used to raise and support concrete slabs, generally outside. Slab jacking repairs settlement by injecting sand-based grout below the concrete to fill voids and raise the concrete.

Soil Modification
Soil modification changes the properties of soil to make it more suitable for bearing the weight of a foundation or structure. It can be used to stabilize sinking foundations in place, when it is determined that the disruption associated with a deep foundation repair outweighs the benefits of mechanical lifting and stabilization, or in conjunction with shallow repairs where the problematic soil is relatively shallow, and a good candidate for soil modification through a chemical grouting process such as permeation grouting.

Methods of Foundation Repair

Below is a comparison of the four major methods of foundation repair used in Texas. While each has its advantages and its disadvantages, a side-by-side comparison of Dawson’s Bell Bottom Pier method clearly demonstrates that it is the most reliable way to solve a home foundation problem permanently. This method is proven and has been tested over time. This is the same building concept used to build support columns for bridges and highway overpasses. And the following link will help you compare the true cost of foundation repair. When you get the facts, you can be confident in your decision to trust Dawson Foundation Repair.
If you would like a more technical examination of each of the methods of foundation repair, check out ADSC’s (The Association of Drilled Shaft Contractors) article Potential Heave in the Pressed Concrete & Pressed Steel Piles in Residential Foundation Construction which details serious problems with piling methods in the Dallas metroplex area and how they can damage your home’s foundation – or take a look at the conclusions of PhD recipient Tom Witherspoon made in Load Capacity Testing and Analysis of Residential Underpinning Systems in Expansive Clay Environment.

FOUNDATION REPAIR – CONCRETE FOUNDATION LEVELING

Do you have cracked walls? Doors that won’t close? Bulging floors? Any of these can be signs of foundation problems. Foundation settlement can lead to major structural problems within your home. Luckily there are ways to repair a concrete foundation without having to tear it out and start from scratch.

Foundation settlement and movement requiring foundation repair can be caused by building on expansive clay, compressible or improperly compacted fill soils, or improper maintenance around foundations. Older homes are typically more susceptible to foundation problems, especially in the semi-arid southern region of the United States including cities such as Houston and Dallas, Texas. Whatever the cause, settlement can destroy the value of structures and even render them unsafe. If you see signs of foundation distress, don’t delay in getting the problem solved. The longer you wait, the more your foundation will sink and cause further costly damage.

There are two common methods for lifting a sunken concrete foundation: piering and slabjacking. Piering fixes concrete foundations by placing supports underground that lift and support the concrete. While, slabjacking fills the space under the slab with a grout mixture that floats the foundation back to its original position. A professional will be able to asses which repair method is best suited for your foundation issues.

Whether your home has sunk just a few inches or nearly a foot, a concrete floor and foundation repair contactor can provide some form of underpinning as one of their services to repair your failed foundation. If you think that there is a problem with your foundation, call a professional foundation repair contractor for an assessment of your property. They will be able to assess any damage that has occurred and determine the best plan for your situation. To repair your foundation it is likely that you will spend around $10,000 dollars. But remember, you are protecting your biggest investment, your home.

Use these resources to educate yourself on the process of foundation repair. As a homeowner, it is always good to protect yourself by knowing about the work you are having done.

CONCRETE FOUNDATION REPAIR METHODS

Past techniques for repair of sunken concrete has varied. Wood, concrete, cement and steel have been poured, pushed, turned or somehow forced into the ground trying to salvage these foundations and slabs, while early on, anyone and everyone, trained or untrained, became “experts” at this type of repair. Often as not, the repairs proved to be futile.

Other, more successful, methods of remediation involve extensive disruption of the family or business using the building. Usually, it is desirable that settlement of building slabs and monolithic foundations in residential areas be corrected without having to move all furniture, appliances, and possibly the whole family, or in commercial areas, without disrupting business.

However, with todays technology and trained experts, there are a number of very successful solutions to the problem of sunken concrete that involve little or no disruption to normal living or business routine.

The two most common methods of this type of repair are slabjacking and hydraulic jacking (also known as piering).

In a slabjacking operation, grout is pumped beneath a slab or beam to produce a lifting force that restores the member to its original elevation.

In piering, steel posts are driven through unstable soil and hydraulic jacks are used to raise or stabilize concrete slabs affected by changes in the underlying soil. The repair method used depends on the type of distress being treated.

Choosing the Correct Method for Concrete Foundation Repair

Before deciding on a repair method, you must determine what is causing the distress. Examine moldings and trim boards, mortar joints in brick veneer, and windows in low areas for clues. Also take note of recent weather. Unusually dry or wet weather can cause problems in the underlying soil.

The most commonly used method of correcting smaller slabs of sunken concrete, such as residential slabs, driveways, sidewalks, swimming pool decks, etc. is slabjacking.

Slabjacking is done by pumping a cement grout through small, strategically-located holes in the concrete slab. Once in place, the grout solidifies into a dense concrete mass and provides a competent bearing for the concrete slab.

If a soil-cement-lime grout is used, the lime content of the slurry will impart the benefits of lime stabilization to the base or sub-base. This combined treatment not only restores the slab to proper grade but also stabilizes the sub-soil to prevent re-occurrence of the problem.

For larger problems, especially those found in house and commercial building foundation shifting, piering is typically used to lift and stabilize the foundation.

Piering involves the use of strategically placed mechanical jacks to lift the settled beam to grade. The beam must be raised carefully to avoid further or unnecessary damage. Once raised, the beam is held to elevation by a specially designed spread footing and pier.

The footing is set deep enough so that it will be independent of variations in soil moisture. It is also designed to adequately distribute the load without creating unnecessary bulk or mass. The pier is tied into the footing with steel and supports the foundation beam.