New railway construction integration role and soil mixing conveyor belt use

Living house dust and noise away from the spirit of the principle of mixing station located at the rear . After the completion of the layout of the site hardening mixing station

, laying the concrete layer and gravel cushion 10cm thick. Concrete mixing station layout three centralized selection of equipment supporting concrete

Soil mixing station mainly concentrated Equipment Name Model Number Capacity and specifications compulsory mixer JS50025m3/h2 batching machine HPW800D50m3/h2 computer controller

SLZK42 loaders ZL30A1 concrete pump truck drag chain conveyor concrete mixer truck Metropolis Metropolis IHI20m3/h1 cards 6m33

Generators 120kW14 mixing plant designed by two sets consisting of mixing floor pavers common arrangement mostly single or dual -column . Namely the so-called single-row

opposite type, the discharge port disposed roller conveyor in the middle, two sides of blender breakdown ; namely the so-called double -row side by side , two juxtaposed mixer

The discharge port are moving in one direction . Advantages of single -type concrete the material quickly , the overall stability, security and good ; drawback is you must

follow the mixer batching machine breakdown on both sides of the mouth feeding , stacking and loading of concentration, loaders must charge back and forth on both sides . Double

-row compact appearance with

Feeder two in a row, side by side on the material , loading concentration, and small footprint . Drawback is controlled by batching machine pitch , resulting in two sets mixing

machine spacing is too large, resulting in the discharge port connected hopper slope too slow , difficult to discharge , recurrent obstruction affecting production. According to

my unit volume of concrete and pipe work

The actual situation of tight , we chose the single -style layout .
Concrete production , transportation and pumping concrete pumping sand pipe production of concrete production is mainly carried out through the concrete mixing , and its

production process is semi-automatic , automatic control computer that batching , mixing manually controlled discharge , specific production process is divided into feed

, Metering , mixing , discharging four stages .
( A ) feed materials from the stockyard by a shovel loaders transported to breakdown on both sides of the mixer batching machine hopper . Hopper as one of the three- hopper

structure , a stone warehouse, two sand compartment.
( 2 ) Measurement of Aggregate measurement through batching machine computer controller automatically , portable weighing vehicles metering , simply enter the preset mixing

ratio can be automatically measured . Measured in pounds , said cement , artificial unpacking ; admixture add custom containers ; water metering using automated quantitative

water

Sheets to control .
( 3 ) mixing cement , gravel , sand by the lifting hopper raised to the mixer fully mixing , and controls water . Mixing using timing control , compulsory mixing . Optimal

mixing time required by field testing to determine , on-site control by not less than 45s .
( 4 ) adequate mixing of the raw material discharge port after falling to a tanker inside . The hopper can be made , the opening size and tanker inlet matches while ensuring a

smooth interior , slope can not be too slow , so as not to affect the flow rate of the concrete .
Concrete transport refers to transport concrete from the concrete mixing station pumping from the tankers to the scene of the process. Tanker loading excluded before the water

inside the drum . In the process of feeding and transport to gyrate , to prevent segregation of concrete . After access to the site , let Drum Forward

12min and then invert the material. After unloading tankers with self- hosed spout and chute concrete residue adhering to avoid affecting the next concrete discharge flow rate.

In the summer the temperature is high ( greater than 25e), pay attention to controlling the lifetime of the concrete in the tank does not exceed 1h. Cool

Summer season can be wrapped canvas tank to minimize the influence of ambient temperature on the slump .
The transport conveying concrete using concrete pumping main tank to send complementary approach. For bridge piers and other structures to pumping with higher strings pouring

cylinder method ; foundation for culverts and other structures in the lower tank Entitlement to chute pouring method . Construction should pay attention to the following parties

Face: ( a ) pumping grading requirements for raw materials is high, as can be required before mixing pump test. Reasonable mix and well-graded aggregate is an important factor

to prevent plugging . ( 2 ) before you start pumping water into the wet hopper and pipe , and then pressed into 1B2 cement mortar to lubricate the tube

Road, the concrete in the pipeline to increase mobility . General mixing two materials ( approximately 1m3) can be. ( 3 ) of the pumping site , the concrete tank due to the drop

height and the slump of the concrete , the concrete flow or poor often accumulate in the pump inlet grid made ​​of steel

Feed into the slow , dedicated two people can carry on a shovel from the tanker to the concrete chute down Pa , the accumulation of concrete paving on the grid to open .
Experience ( 1 ) through the establishment of centralized Qinshen line mixing station , concrete immediate focus was on the concrete mixing quality and the role of the

construction progress . First, the purchase of materials and the main timber unified , stable quality , which will help manage and reduce material waste ; Second , measuring

quasi-

Indeed, mixing speed, high quality concrete , reducing human factors on the quality of the concrete ; Third , equipment centralized management , maintenance and timely ; Fourth,

mixing station factory construction, construction procedures , skilled workers to operate , less prone to accidents. ( 2 ) Concrete concentrated

Mixing various projects currently stand construction has obviously demonstrated its superiority , but into a larger one , the ministry only mixing plant mixing station ,

batching machine, truck and tanker reached 4.4 million yuan investment . In order to save investment , conditions can be self-processing part of the equipment , such as batching

machine , storage

Hopper , purchasing some electronic component assembly can also achieve the same effect. Mixing machine during use , liner, leaves a large amount of wear and tear , replacing

more frequently, and expensive, belt conveyors can be customized to a specific mechanical machining or processing plant , the cost can be reduced about 70%.