Whether the flexible connection of the prestressed reinforced concrete pipe groove type needs to be

Nanjing Mancartel has developed a 50-year underwater non-aging planting glue, which has passed non-toxic testing and has been widely used in projects including Zhejiang Zhoushan Wharf, with free technical support nationwide and same-day delivery. There are 8 offices in China, and the after-sales service is guaranteed. Passed ISO quality system certification, or China famous product products, underwritten by insurance companies, contact Mancartel 4-0-0-8-9-4-5-1-1-8

Differences: 1. Asphalt hemp wire caulking should be used for flat mouth construction, steel wire mesh should be laid outside, and high-strength mortar joints should be poured on the tongue and groove as long as asphalt hemp wire caulking and mortar joints are on the line.

2. The flat mouth pipe is easy to install, but after being affected by settlement, it will be misaligned and the pipe will leak. This will not happen with tongue-and-mouth ones.

According to the different types of pipe joints, concrete pipes can be divided into flat pipes, socket pipes and tongue-and-groove pipes. Its interface forms include cement mortar wiping belt interface, steel wire mesh cement mortar wiping belt interface, cement mortar socket and rubber ring socket.

The flat mouth construction is difficult, and the tongue and groove are simple.

Asphalt hemp wire caulking should be used for flat mouth construction, steel wire mesh is paved outside, and high-strength mortar joints are poured.

The jacking concrete pipe should be tongued and grooved.

GB175-1999 Portland cement, ordinary Portland cement.

GB199-1990 Fast hardening Portland cement.

GB T 701-1997 Mild Steel Hot Rolled Round Wire Rod.

GB748-1996 Sulfate-resistant Portland cement.

GB1344-1999 Slag Portland cement, pozzolana Portland cement and fly ash Portland cement.

GB1499-1998 Hot-rolled ribbed steel bars for reinforced concrete.

GB1596-1991 is used for fly ash in cement and concrete.

GB8076-1997 Concrete admixture.

GB13788-1992 Cold-rolled ribbed steel bar.

GB T14684-1993 Construction sand.

GB T14685-1993 Construction pebbles, gravel.

GB T1672-1997 Test Method for Concrete and Reinforced Concrete Drainage Pipes.

GB50204-1992 Code for Construction and Acceptance of Concrete Structure Engineering.

GB J81-1985 Test method for mechanical properties of ordinary concrete.

GB J107-1987 Concrete strength inspection and evaluation standard.

JG J63-1989 Standard for water used for concrete mixing.

JC 714-1996 Fast hard sulfur aluminate cement.

Introduction: Reinforced concrete pipes are pipes made of concrete or reinforced concrete. It is used to transport water, oil, gas and other fluids.

Classification: 1. Reinforced concrete pipes are divided into four categories: plain concrete pipes, ordinary reinforced concrete pipes, self-stressed reinforced concrete pipes and prestressed concrete pipes.

2. According to the different inner diameters of concrete pipes, they can be divided into small-diameter pipes (inner diameter below 400 mm), medium-diameter pipes (400 1400 mm) and large-diameter pipes (more than 1400 mm).

3. According to the different water pressure capacity of the pipe, it can be divided into low-pressure pipe and pressure pipe, and the working pressure of the pressure pipe is generally megapascal and so on.

4. Compared with steel pipes, concrete pipes can be divided into flat pipes, socket pipes and tongue-and-groove pipes according to the different types of pipe joints.

A flat mouth means that the two ends of the pipe are straight and the diameter of the pipe is the same.

The tongue and groove are the same as the socket, and the local diameter of one end of the pipe can be increased to allow the other pipe to be inserted, which is conducive to preventing water seepage of the joint.

The drainage pipe is mainly responsible for the drainage tasks of rainwater, sewage, farmland drainage and irrigation. Drainage pipes are divided into plastic drainage pipes, concrete pipes, and reinforced concrete pipes. The drainage pipe is a new type of corrugated plastic pipe formed by adding other additives to high-density polyethylene (HDPE), and the permeable corrugated pipe is made by punching holes in the groove and wrapping needle-punched geotextile around the outside of the pipe.

According to the type of bellows, it can be divided into single-wall permeable bellows and double-wall permeable bellows. Because the pipe hole of the product is in the trough and is elongated, it effectively overcomes the drawbacks of the flat round hole product that is easy to be blocked and affects the drainage effect, according to different drainage requirements, the size of the pipe hole can be 10mm 1mm-30mm 3mm, and can be evenly distributed in the range of 360 degrees, 270 degrees, 180 degrees, 90 degrees, etc., and is widely used in the drainage fields such as highways, railway subgrades, subway projects, landfills, tunnels, green belts, sports fields and slope protection caused by high water content. and underground irrigation and drainage systems for agriculture and horticulture. Together with soft permeable pipes and plastic blind ditches, it has become the three main products in China's civil engineering construction (water seepage and drainage).

Depending on the size of the drainage pressure, the municipal drainage pipe network can choose double-arm bellows and straight-wall pipes. The straight-walled pipe has a strong pressure bearing capacity and can be used for special pipes in large-scale drainage and sewage pipe networks.

DN is used to represent the pipe diameter, such as DN500, its inner diameter is basically about 500mm, as for the outer diameter should be based on different pipes, whether it is steel pipe or concrete pipe, reinforced concrete pipe, cast iron pipe, etc., and due to the difference in manufacturing process, etc., the different wall thicknesses are also taken into account, and different working pressure levels should be taken into account. Generally, the inner diameter and outer diameter of the steel pipe DN500 are 500mm and 530mm respectively.

DN500 nominal diameter 500mm.

The nominal diameter is also called the average outer diameter, which is neither the outer diameter nor the inner diameter, but close to the inner diameter, is a data near the inner diameter, generally = the average value of the inner diameter + wall thickness, the metric mm is the benchmark, called DN, it is the diameter we calculate, and the actual water capacity of the pipeline is reflected.

Nominal diameter, also known as mean outside diameter. Refers to a standardized diameter series of vessels, pipes, and their accessories. The use of nominal diameter is conducive to the standardization of parts, and is also convenient for design, manufacturing, repair and management, and reduces manufacturing costs.

For containers, the nominal diameter is expressed as the inner diameter; For pipes, it is expressed as a size smaller than the outer diameter and larger than the inner diameter. Corresponding to a certain nominal diameter of the pipe, its outer diameter is a certain value, and the inner diameter varies with the wall thickness.

The inner diameter of the standard steel pipe is 500mm, and the outer diameter is 508mm or 530mm.

Further information: Steel pipes have hollow sections that are much longer than steel with a diameter or circumference. According to the cross-sectional shape, it is divided into round, square, rectangular and special-shaped steel pipes; According to the material, it is divided into carbon structural steel pipe, low-alloy structural steel pipe, alloy steel pipe and composite steel pipe; According to the use, it is divided into steel pipes for transportation pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, and high-pressure equipment. According to the production process, it is divided into seamless steel pipe and welded steel pipe, of which seamless steel pipe is divided into hot rolling and cold rolling (drawing), and welded steel pipe is divided into longitudinal welded steel pipe and spiral seam welded steel pipe.

Steel pipes are not only used to transport fluids and powdery solids, exchange heat energy, and make mechanical parts and containers, it is also an economical steel. The use of steel pipes to manufacture building structure grids, pillars and mechanical supports can reduce weight, save metal by 20 40%, and can realize factory mechanized construction. The use of steel pipes to make highway bridges can not only save steel and simplify construction, but also greatly reduce the area of the protective layer and save investment and maintenance costs.

Steel pipes can be divided into two categories according to the production method: seamless steel pipes and seamed steel pipes, and seamed steel pipes are referred to as longitudinal steel pipes.

1.According to the production method, seamless steel pipes can be divided into: hot-rolled seamless pipes, cold-drawn pipes, precision steel pipes, hot-expanded pipes, cold-spinning pipes and extruded pipes. Seamless steel pipes are made of high-quality carbon steel or alloy steel, and are hot-rolled and cold-rolled (drawn).

2.Welded steel pipes are divided into furnace welded pipes, electric welded (resistance welded) pipes and automatic arc welded pipes because of their different welding processes, and are divided into two kinds of longitudinal welded pipes and spiral welded pipes because of their different welding forms, and round welded pipes and special-shaped (square, flat, etc.) welded pipes because of their end shapes.

Standard steel pipes. Inner diameter 500mm

Outer diameter 508mm or 530mm

Commonly known as inches and nominal outer diameter mm4 points 1 215 20

6 points 3 420 25

1 inch 125 32

1 inch 211 432 40

1 inch and a half 1'/_40ф50

2 inch 250 63

3 inch 380 90

4 inch 4100 110

5" 5125 140

6 inch 6150 160

DN is the nominal diameter, and the nominal diameter (or nominal diameter) is the common diameter of various pipes and pipeline accessories. Pipes and pipe accessories of the same nominal diameter can be connected to each other and are interchangeable. It is not an actual outer or inner diameter of a pipe, although its value is close to or equal to the inner diameter of the pipe;

In order to unify the connection size of pipes and pipe fittings, the nominal diameter (also known as nominal diameter and nominal diameter) is adopted. For example, welded steel pipes can be divided into thin-walled steel pipes, ordinary steel pipes and thickened steel pipes according to their thickness. Its nominal diameter is not the outer diameter or the inner diameter, but a nominal size approximating the inner diameter of ordinary steel pipes.

Each nominal diameter corresponds to an outer diameter, and its inner diameter value varies with the thickness. The owner wants to know the detailed parameters, and should also give the material and wall thickness.

1.Is the pipe diameter reasonable? It depends on his parameters to calculate, and you probably won't.

2.Whether the pipe diameter change and slope are reasonable, that is, do not change the diameter and slope frequently, which brings inconvenience to the construction.

3.Whether to take the top of the pipe flat connection. When the water head of the pipeline falls, it is advisable to set up a fall well; When the head of the water fall is larger, a water fall well should be set up. It is not advisable to set up a fall well at the turn of the pipeline.

4.Whether the bottom of the rainwater well is 250mm lower than the pipeline, and whether the sewage well is a launder.

5.The spacing between stormwater outlets should be 25 50m. The number of connecting pipe series rainwater outlets should not exceed 3. The length of the rainwater inlet connection pipe should not exceed 25m. However, when the longitudinal slope of the road is larger, the spacing of the stormwater inlets can be greater than 50m.

6.Whether the composite final discharge port can be discharged.

1. It is very important to determine whether the pipeline layout in the cross-sectional management committee diagram is reasonable, and whether it is based on the planning or the layout of the pipe position version of the built road. At the same time, check whether the requirements for the clear distance between pipelines meet the specification requirements of pipeline integration.

2. Check whether the elevation of the starting point drainage pipeline can meet the requirements of the rain and sewage pipeline transfer to other roads. If possible, it's a good idea to review the design flow of the pipeline.

3. The drainage pipeline connected to other roads must review the pipe bottom elevation, pipe diameter and current operation of the access point inspection well.

4. For the water supply design, mainly look at the node sample drawing. Are fire hydrants arranged more than 120m apart? Are fire hydrants crossed on both sides of the road? Whether the type of fire hydrant is reasonable, etc.

I hope it can help you, and deal with the leader first haha.

Drainage: see whether the slope meets the requirements of the code and the depth of burial. distance from other pipelines, etc.

Water supply: mainly the avoidance of various pipelines, the distance from the wall and the structure.