Teoh Hon Kim . on LinkedIn: Bored piles are necessary for each bridge, as they are specially designed… (2024)

It was my pleasure to attend Mr. Li Hong Song's class, who is from China Railway Eryuan. He shared valuable information about China's railways, Chinese codes for track works, detailed designs of track works, and continuous welded rail (CWR). Although he has already returned to China, he was kind enough to leave his phone number so that I can stay in touch with him to discuss both countries' railway sectors.#knowledge #friendship

Do you know what the role of thermocouples is in construction? It is used to monitor the concrete temperature. Its main objective is to determine the maximum temperature differential of the mass concrete structure during and after casting. Besides, it shall commence at the beginning of each concreting and end after seven days, or whatever the temperature differential of concrete reduced to a level that further temperature monitoring is deemed unnecessary.#thermocouples #concrete #temperaturemonitoring

A pile cap is a thick, reinforced concrete slab that sits on top of a group of piles, binding them together to distribute loads evenly from the superstructure above (like a building or bridge) to the piles below. The construction involves setting out, excavation, lean concrete, preparation of pile head, rebar installation, concreting, and curing. The construction working sequence is depicted in the diagram below:Important notes:a. The piles should have completed the pile integrity testing before the construction of the pile cap. b. The excess length of pile head shall be hacked by pneumatic jack hammer to the designed pile cut-off level as indicated on the construction drawing. c. Any excavation more than 1.5m, bench shall be provided for slope stability. #pilecap

We might not know exactly how the Egyptian pyramids were built, but if we had had tower cranes back then, the process might have been much easier. There are different types of cranes, and they always play an important role, particularly in manufacturing and construction sites. For example, the tower crane. Of course, ECRL also uses tower cranes. Thank you for sharing this video with us. As an office boy, I rarely see the process that how contractors build tower cranes.#towercrane

Well done Muhammad Izzad! Good explanation of bored pile construction. Essentially, the bored pile is designed based on soil conditions. However, there are still challenges during the boring process, such as maintaining the correct inclination of the piles, encountering hard rock, and dealing with weather conditions.

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The Statnamic Load Test is a type of point load test designed to evaluate the axial load capacity of a pile by simulating static load conditions. It provides information on how the pile will behave under actual service loads, making it a reliable method for assessing foundation performance. FYI, ECRL also performs this test on bored piles, but it is only conducted in Section 9 in Selangor state.Procedure 1. Loading MechanismThe test uses a large, specially designed reaction mass that is propelled downward using a combustion-driven or gas-powered system. This rapid downward motion applies a force to the pile, causing it to move downward.2. Load ApplicationThe load is applied over a short duration, typically between 100 milliseconds to 1 second, depending on the test setup. Despite the short duration, the applied load is sustained long enough to simulate a static loading condition.3. MeasurementThe displacement of the pile is measured using high-precision sensors. The applied force and the resulting displacement are recorded to determine the pile's response to the load.Data AnalysisThe data from the SLT is analyzed to generate a load-displacement curve, similar to that obtained from a traditional static load test. Advanced techniques, such as integration of the measured acceleration data, are used to calculate the pile's capacity.#boredpiletest #SLT

Maintained Load Test or MLT 1. Main purpose- To verify the pile's ability to support a specified load without experiencing excessive settlement or failure. It helps engineers determine if the pile meets the design requirements.2. Procedurea. PreparationThe pile to be tested is first installed to its final position. The test setup includes a loading platform or reaction frame, which is securely anchored to the ground to apply the test load.b. LoadingIncremental loads are applied to the pile in stages, typically in increments of 25%, 50%, 75%, 100%, 125%, and sometimes up to 150% of the design load.c. Maintaining LoadAt each load increment, the load is maintained for a specified period (usually 15 to 60 minutes) to allow the pile to settle. The amount of settlement at each load stage is recorded.d. ObservationsThe settlement of the pile is measured using precise instruments such as dial gauges or electronic sensors. These measurements are taken continuously or at regular intervals during the load application.e. UnloadingAfter reaching the maximum test load, the load is gradually reduced in stages, and the pile's recovery (elastic rebound) is observed.3. Data analysisThe results from the test, including the load-settlement curve, are analyzed to determine the pile's ultimate load capacity, the load at which excessive settlement occurs, and the pile's overall performance under load.4. InterpretationThe data obtained from the MLT helps engineers decide whether the pile is suitable for the intended structural load or if any modifications or additional reinforcement are necessary.#Boredpilestest #MLT

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The term of condition for "cross hole sonic logging test"- Only can be carried out on cast-in-situ piles after 7 days or more from the date of pile casting otherwise allowed/instructed.- "Bored piles of length 40m or above" OR "pile diameter equal to or more than 1.5 m".- The internal tube diameter should be no less than 40mm, with no internal projections or couplings, and the wall thickness should be a minimum of 2mm.#boredpiletest #PIT #sonicloggingtest

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The term of condition for "Shock Test" (low-strain method)- Pile length <=40m or pile diameter<1.5m- Pile head not more than 1.0 above or below ground levelWorking FlowThe engineer hits the top of the foundation with a handheld hammer. The impact of the hammer generates a compressive stress wave in the pile or shaft, and an accelerometer placed on top monitors the motion associated with this wave. The stress wave propagates down the pile shaft and is reflected when it encounters either the toe or a non-uniformity of the shaft. These reflections cause a change in the acceleration signal measured on the pile top, which is picked up and processed by thePile Integrity Tester(PIT) equipment and interpreted by an experienced engineer.#Shocktest #hammer