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Steel sheet piles are a commonly used foundation support material in construction projects. They can effectively isolate soil and water and reduce foundation settlement and deformation. However, during the actual construction process, steel sheet piles also have some construction difficulties. This article will analyze these difficulties and discuss how to solve them.   Construction difficulties of steel sheet piles 1. Complex strata In some cases, the geological conditions of the construction site are unstable, the texture and thickness of the geological layers are uneven, and there are rock layers, loose layers, or large water levels in some places, which brings great challenges to the construction of steel sheet piles. Because different geological layers require different treatment methods during the construction process, and some precious resource areas have very high environmental protection restrictions, such as reducing the effects of steel sheet piles on water flow after ... Continue reading →

The ERW method, which stands for Electric Resistance Welding, is a commonly used metal welding method. It uses the principle of resistance heating to apply current at the metal joint to generate heat to locally melt the metal, and then connect the two metal joints together. ERW pipe is made by this method.   The ERW method is efficient, fast, and economical, and is widely used in various fields. The ERW method works by generating heat through the action of an electric current, causing local melting of the metal joints. During the welding process, two metal joints need to be tightly connected together, and an electric current is applied. The resistance created by the current passing through the metal causes the temperature of the joint to rise, reaching the melting point and starting to melt. Then, pressure is applied to compress the two metal joints together so that they form a strong connection in the molten state. This welding method can be used to weld different types of ... Continue reading →

LSAW (Longitudinal double submerge arc welding) is a type of SAW pipe made of steel plates that were hot rolled by JCOE or UOE forming technology. JCOE technology represents the shaping and forming processes involved during manufacturing as well as the inner and outer welding and cold expansion carried out after welding.   Process of straight seam submerged arc welded tube Longitudinal submerged arc welded tube is a common welding process used to weld steel pipes. The following is the process flow of straight seam submerged arc welded tube: 1. Preparation: Collect required materials and equipment, including steel pipes, welding rods, welding machines, brushes, sandpaper, etc.   2. Surface treatment: Use brushes and sandpaper to remove rust and dirt on the surface of the steel pipe to ensure the quality of welding.   3. Edge grinding: chamfer or bevel both ends of the steel pipe to be welded to form a V-shaped gap and improve the welding quality of the joint. 4. ... Continue reading →

During the entire construction process, steel sheet piles are auxiliary equipments that must be used. Only after the steel sheet piles are well positioned can the subsequent filling, pouring, and support be better completed, so that subsequent projects can be more efficient. It should be noted that steel sheet piles are not disposable items during construction and can be recycled. Therefore, they need to be dismantled after use to prepare for storage for subsequent secondary use.   The use of steel sheet piles (such as Larson steel sheet piles) is becoming more and more common now. There are also some considerations about the storage of steel sheet piles. A good storage environment can effectively extend the service life of steel sheet piles. Therefore, at the steel sheet pile construction site, "three connections and one leveling" must be done. And according to the site conditions, if possible, make a concrete cushion on the ground first to facilitate construction. ... Continue reading →

"ERW pipe" is Electric Resistance Welding, abbreviated as ERW. It is used to transport vapor and liquid objects such as oil and natural gas. It can meet various requirements of high and low pressure and occupies a decisive position in the field of transportation pipes in the world.   First, ERW steel pipes have good quality and long service life; second, ERW steel pipes have good surface quality, uniform coating, save a lot of coating materials, and low anti-corrosion costs for steel pipes; third, ERW steel pipes have high geometric and dimensional accuracy, fast butt welding speed, and on-site construction high efficiency, in addition to reducing the cost of spinning.   ERW steel pipe vs. SSAW steel pipe Due to the different shaping, welding and processes in the pipe making process of ERW steel pipes and SSAW steel pipe, there are certain differences in the performance of the two steel pipes.   (1) The surface quality of ERW steel pipes is better than SSAW ... Continue reading →

The steel pipe pile is composed of a steel pipe, a tongue and groove, and a tongue and tenon pin. The left end of the diameter of the steel pipe is vertically connected to the tongue and groove on the wall. The cross-section of the tongue and groove is a square frame with one side open. There are reinforcing ribs on the side, and a tongue-and-groove pin is vertically connected to the pipe wall at the right end of the diameter of the steel pipe at an offset radius position. The groove section of the tongue-and-groove pin is I-shaped.   Steel pipe pile is a pile made of steel pipe. Its functions are mainly reflected in the following aspects: 1. Foundation reinforcement When the bearing capacity of the foundation is insufficient, steel pipe pile reinforcement can be used to increase the bearing capacity of the foundation and achieve the purpose of reinforcing the foundation. 2. Deep foundation pit support When constructing deep foundation pits, steel pipe piles are usually used for ... Continue reading →

Z type sheet pile is a type of steel sheet pile. The locks of Z type sheet pile are symmetrically distributed on both sides of the neutral axis. Coupled with the continuity of the web, the section modulus of the steel sheet pile is greatly improved. It is improved to ensure that the mechanical properties of the section are fully utilized.   Characteristics of Z type sheet pile 1. The cross-section width is large and the pile sinking effect is remarkable. 2. Large section modulus. 3. The moment of inertia is higher, which enhances the stiffness of the steel sheet pile wall and reduces structural deformation. 4. Excellent anti-corrosion effect.   Advantages of Z type sheet pile 1. Flexible design, with relatively high section modulus and mass ratio; 2. Higher moment of inertia, thereby increasing the stiffness of the sheet pile wall and reducing displacement and deformation; 3. Large width, effectively saving time on hoisting and piling; 4. The increased cross-section width ... Continue reading →

Carbon steel seamless pipe is a kind of long steel material. Steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, coal gas, water and certain solid materials. The material constituting the seamless pipe can also be stainless steel, that is, stainless steel seamless pipe.   Characteristics of carbon steel seamless pipes 1. The biggest feature of carbon steel seamless pipe The biggest feature of carbon steel seamless steel pipes is that they have no welding seams and can withstand pressure from the inside. Therefore, they are widely used in various important transportation fields. Compared with seamed steel pipes, seamless steel pipes have better bending resistance, torsional strength and a pressure-bearing effect. It is made of perforated round steel, which has better bending, and torsional strength compared to steel pipes made of hot-bent steel plates.   2. Other characteristics of ... Continue reading →

Steel casing pipe is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Petroleum casing is usually made of steel, manganese steel and other alloy materials. Its nominal diameter is usually between 114 mm~620 mm. The length also has different specifications and requirements. It has the characteristics of high temperature, high pressure and corrosion resistance, so it can be used in harsh conditions. Stable operation under environmental conditions.   The production process of steel casing pipe The production process of steel casing pipe generally includes the following steps: The first is material preparation, which requires the selection of high-strength, high-corrosion-resistant steel or other alloy materials. Then they proceed to processing and manufacturing, and perform material cutting, shaping, welding, heat treatment and other processes according to ... Continue reading →

During the use of stainless steel seamless pipes, due to the influence of the external environment and conditions, the internal structure changes and oxide scale is produced. The oxide scale existing on the surface of stainless steel has a dense structure and strong adhesion to the substrate. It must be removed first before subsequent decorative treatments such as passivation, electroplating, and coloring. The existence of oxide scale will have a great impact on the quality of stainless steel, so the oxide scale must be treated. The following will introduce the oxidation scale treatment method of stainless steel seamless pipe. Chemical composition of stainless steel oxide scale. Stainless steel contains chromium, nickel, iron, a small amount of carbon and silicon, and may contain manganese, titanium, molybdenum, tungsten and other elements. During smelting, casting, hot rolling, heat treatment, welding and other processes, oxidation will inevitably be generated. There are a variety of ... Continue reading →

1.Material requirements The material of welded steel pipe(stainless welded steel ) should comply with American standards, European standards or other standards, and is usually made of carbon steel, alloy steel and other materials. Welded steel pipes of different materials have different performances in use, so the material should be selected according to actual needs.   2. Size requirements The dimensions of welded steel pipe should comply with relevant standards, including outer diameter, wall thickness and other parameters. You need to check whether its product description is complete, and whether the pipe body is marked with the relevant manufacturer, brand trademark, production date, product name, specifications and dimensions, implementation standard number, etc. In addition, whether the nominal outer diameter of the steel pipe, pipe system S, etc. are indicated. Whether the logo is clearly visible, and we need to check whether the logo is consistent with the actual ... Continue reading →

The cracking problem of stainless steel welded pipes indicates that there is a problem with the quality of the stainless steel welded pipes. The quality of stainless steel welded pipes is determined by the raw material steel strips. Good stainless steel pipe manufacturers choose steel strips produced by refining furnaces of large factories in the selection of raw materials. The main reasons why stainless steel welded pipes crack are as follows:   1. Inferior raw material steel strip The quality of stainless steel strips is the basis for determining the quality of stainless steel welded pipes. According to the level of copper content, it can be divided into low copper materials, medium copper materials and high copper materials. The ductility effect of the stainless steel pipes produced in this way is gradually enhanced, and at the same time The price will also increase accordingly. Because there are many brands of stainless steel pipes on the market and peers are lowering prices ... Continue reading →

What is oil casing? Oil casing is a pipe used to fix the oil shell in the oil well and control the stability of the well wall. It is usually made of high-strength steel pipes that can be several kilometers long and range from a few inches to a foot in diameter. The purpose of casing an oil well is to protect the well walls and control pressure so oil and gas can flow through the wellhead. Casing is one of the most important components of an oil well and plays a vital role in well safety, production and environmental protection. Design of oil casing Oil casing must be reasonably designed according to different oil well types and geological conditions. The design principle is to ensure that the casing is strong enough while minimizing the cost of oil well construction and the impact on the well's output. Most oil casings reserve a certain gap in the oil well to accommodate complete control systems, such as valves, hooks, filling systems, etc., and they also need to be perforated at ... Continue reading →

Seamless steel pipe is a long strip of steel with a hollow section and no seams around it. There are more than 5,100 production plants of more than 1,850 companies in more than 110 countries that produce seamless pipes around the world. Among them, more than 260 plants of more than 170 companies in 44 countries produce oil pipes.   Seamless steel pipes are lightweight, corrosion-resistant, high-temperature resistant, and not easily deformed. They are widely used in the transportation of oil, natural gas, gas, water, and certain solid materials. Disadvantages of seamless steel pipe 1. Difficulty in manufacturing The manufacture of seamless steel pipes requires multiple processes, including heating, perforation, rolling, etc. Each process requires precision control, making the process difficult. 2. The price is higher Due to the difficulty of manufacturing and high production costs, the price of seamless steel pipes is relatively high, which may impose a burden on some companies. 3. ... Continue reading →

When it comes to small foundation pit support excavation, especially municipal projects, steel sheet piles are the most common and relatively cost-effective support method. Steel sheet pile is a type of steel with a lock. The cross-sections include linear, Z-shaped, U-shaped, H-shaped, hat-shaped, etc.   Steel sheet piles are divided into two types according to production technology: cold-formed steel sheet piles and hot-rolled steel sheet piles, with the latter taking the lead. There are many different sizes, models and locking forms, such as the most commonly used Larson steel sheet pile. Why is it called Larson? Because the engineer who invented this steel sheet pile is called Larson. The so-called Larsen is a U-shaped riveted interlocking steel sheet pile. In short, it is a steel sheet pile designed with a U-shaped protruding cross-section and can be used to interlock adjacent steel sheet piles. Excavation and support construction is a key process that determines the success ... Continue reading →

The hardness of black carbon steel pipe can be affected by many different factors, including carbon exposure, the amount and type of other elements in the alloy, and the specific process used to make the steel. Mild steel contains 0.05% to 0.25% carbon and is typically the softest variety, but can be hardened through a process called carburization. Ultra-high black carbon steel pipe can be composed of up to 2% carbon and is generally the hardest type, although the final hardness of each product is also determined by various heat treatment processes. The quenching process can increase the hardness of black carbon steel pipe by about four times, although subsequent tempering usually reduces the hardness. Black carbon steel pipe is an alloy composed primarily of iron and carbon. Other elements may also be present, usually in very small amounts. The exact makeup of black carbon steel pipe has several different definitions, although elements such as silicon and copper typically make up ... Continue reading →

The following article will introduce the steel sheet pile construction specifications and construction process in detail.   First, steel sheet pile construction specifications (1) The location of the steel sheet piles must meet the design requirements to facilitate the earthwork construction of the trench foundation, that is, there is room for formwork support and removal outside the most prominent edge of the foundation.   (2) The support plane layout shape of the foundation pit trench steel sheet piles should be as straight and neat as possible, and irregular corners should be avoided to facilitate the use and support installation of standard steel sheet piles. The surrounding dimensions should be combined with the board module as much as possible.   (3) During the entire foundation construction period, during construction operations such as excavation, lifting, reinforcing steel bars, and concrete pouring, it is strictly prohibited to collide with supports, ... Continue reading →

Large-diameter seamless steel pipe, as the name suggests, is a seamless steel pipe with a relatively large diameter. The main production processes are hot-rolled large-diameter seamless steel pipes(hot-rolled seamless pipe)  and heat-enlarged diameter seamless steel pipes.   The problem of uneven wall thickness of large-diameter seamless steel pipes is relatively common in the production of seamless steel pipes, and it is also a headache for customers. The unevenness of thick-walled seamless steel pipes is mainly reflected in uneven spiral walls, uneven linear wall thickness, and slightly thicker and thinner ends at the head and tail. The inducing factors for the unevenness of large-diameter seamless steel pipes are uneven wall thickness caused by adjustment reasons such as the inclination of the cold-rolling center line of the cutting machine, the different inclination angles of the two hot-rolled strips, or the insufficient front reduction of the top. The entire length of ... Continue reading →

What is stainless steel welded pipe? Stainless steel welded pipe is a steel pipe made by welding stainless steel plates or steel strips after being curled and formed by a unit and a mold. The production process of stainless steel welded pipe is simple, the production efficiency is high, there are many varieties and specifications, and the equipment investment is low.   What is stainless steel seamless pipe? Stainless steel seamless pipe is a long steel material with a hollow section(Stainless Hollow Section) and no seams around it. The thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the processing cost will increase significantly. The process of this product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness of the inner and outer surfaces of the pipe, high cost of sizing, and pitting and black spots on the inner and outer surfaces that ... Continue reading →

一般要求 1、钢板桩的位置必须符合设计要求，以利于沟槽基础土方施工。也就是说，在地基最突出的边缘之外有用于模板支撑和拆除的空间。   2、基坑沟槽钢板桩的支护平面布置形状应尽可能平直、整齐，避免出现不规则的拐角，以利于标准钢板桩的使用和支护设置。周边尺寸应尽可能与单板模块结合。   3、整个基础施工期间，开挖、吊装、钢筋、混凝土浇筑等施工作业时，严禁碰撞支架、任意拆除支架、在支架上任意切割、焊接，重型设备不得使用。不得放置在支撑物上。事物。   支持线路测量 根据基坑、沟渠开挖​​设计断面宽度要求，测量并放行钢板桩打桩位置线，并用白石灰对钢板桩打桩位置进行标记。   钢板桩入口及存放区 根据施工进度或现场情况组织钢板桩进场时间，确保钢板桩施工满足预定要求。钢板桩堆放位置根据施工要求和现场情况沿支撑线分散，避免集中堆放在一起造成二次破坏。波蒂奇。   钢板桩施工顺序 定位布置——挖沟——安装导向梁——打入钢板桩——拆除导向梁——檩条及支撑施工——土方开挖——基础施工（输电带）——拆除支撑——地下室主体结构施工——土方回填——钢板桩的拆除——钢板桩拔拔后的间隙处理。   钢板桩的检验、吊装、堆垛 1、钢板桩的检查 对于钢板桩，一般会有材质检验和外观检验，以纠正不合格的钢板桩，减少打桩过程中的困难。   (1)外观检查：包括表面缺陷、长度、宽度、厚度、端部矩形比、直线度及锁形等。注： A。影响钢板桩打入的焊接部位应予以切除； b. 切孔和断面缺陷应进行加固； C。如果钢板桩腐蚀严重，应测量其实际截面厚度。原则上所有钢板桩均应进行外观质量检验。   (2)材料检验：对钢板桩基材的化学成分和力学性能进行全面检测。包括钢材的化学成分分析、构件的拉伸和弯曲试验、锁紧强度试验和伸长率试验等。每个规格的钢板桩至少进行一次拉伸和弯曲试验：每根钢材进行两个试件试验板桩重20-50t。   2、钢板桩吊装 ... Continue reading →