St. asentCustomized leading small catheterPay attention to those common problems

Curing The concrete components shall be covered and moisture cured within 12h after pouring. The time of concrete curing by watering shall not be less than 7 days for the concrete mixed with Portland cement, ordinary portland cement or slag Portland cement; For the concrete mixed with retarded admixture or with impermeability requirements, it shall not be less than 14 degrees. The cured concrete shall be covered with plastic cloth, and all exposed surfaces shall be tightly covered, and condensed water shall be kept in the plastic cloth.

Verify the water permeability of the rock stratum according to the measured water absorption of the borehole to determine the grouting pressure and flow, and determine the grouting slurry and its initial concentration.

St. asent.It is necessary to comprehensively consider the selection and configuration of grouting pipes, and correct selection is very important. Only in this way can the design of the piping system be safe, reasonable, reliable and economical.?

3 cement water glass (sodium silicate) slurry cement water glass slurry is a grouting material composed of cement and water glass as the main agents, which are injected in a double liquid manner according to a certain proportion, the commonly installed grouting pipe is a straight pipe. A diffuser with one-way is set at 300min below the pipe. The grouting pipe is installed at the end of the reinforcement cage installation and sediment treatment (because the end of the bored pile is cone-shaped, in order to avoid damaging the one-way diffuser at the end of the grouting pipe when lowering the reinforcement cage, it is not appropriate to bundle the grouting pipe on the reinforcement cage and lower it at the same time.) The grouting pipe is set in the diffuser with one-way , and must be wrapped with a special inner tube. After the pipe is lowered, the grouting pipe must be filled with water, and the upper end of the grouting pipe should be blocked.

When each formwork is in place, lay the steam probe at the bottom of the formwork, and adjust the profiling after installation. According to the actual needs, the shaped reinforcement on both sides of 1200m shall be installed, and the well shall be upgraded and placed and marked.

The cement grouting method is applicable to the grouting of gravel layer and rock fissure. Ordinary portland cement is generally used the water cement ratio is 1:1, and 2% ~ 5% water glass can be added as the accelerator. Ordinary extrusion mortar pump is used for grouting, and the maximum grouting pressure shall not exceed 1MPa. For silty fine sand and cohesive soil with permeability coefficient less than 10-4cm / s, split grouting can be adopted. The consistency of the cement slurry used for split grouting is large, and other materials such as cement slurry in concrete are blocked outside the grouting pipe to ensure smooth use of the whole section of the grouting pipe.

It is applicable to the laying of buried pipes in gas pipeline projects, and is not applicable to the use of open pipes. The service life of pipes will be affected by the perennial ultraviolet corrosion of sunlight. How to use the grouting pipe after rusting will not affect its . The grouting pipe is a kind of rubber plate we often see. It is widely used and has a long service life. It has been praised and recognized by people. Next, I will introduce the relevant knowledge of the grouting pipe we produce in detail!

The cement grouting method is applicable to the grouting of gravel layer and rock fissure. Ordinary portland cement is generally used, the water cement ratio is 1:1, and 2% ~ 5% water glass can be added as the accelerator. Ordinary extrusion mortar pump is used for grouting, and the maximum grouting pressure shall not exceed 1MPa. For silty fine sand and cohesive soil with permeability coefficient less than 10-4cm / s, split grouting can be adopted. The consistency of the cement slurry used for split grouting is large, and the water cement ratio is 0.45 ~ 0.60. Flower tube method and one-way valve tube method are adopted for grouting. The maximum pressure of grouting is generally greater than 4MPa.

Welcome calls . Non woven filter cloth layer outside the framework. Only water and grout are allowed to pass through, and other materials such as cement slurry in concrete are blocked outside the grouting pipe to ensure smooth use of the whole section of the grouting pipe.

Grouting pipe is a kind of embedded grouting pipe system, which is used for permanent sealing of construction joints, cold joints, pipe seepage joints and gaps between ground walls in concrete. It is very important to install grouting pipes between the joints of new and old concrete. When water seeps into the joint, the PVC end grouting pipe merchants set on the surface can choose to ship at a fair price to reduce the purchase when the future market trend is not clear and the inventory of grouting pipes has decreased slightly. Affected by insufficient demand, and the daily turnover is basically below 50 tons. At present, the steel price may have reached the bottom, and there is limited room for decline in the later period. The future price may still be dominated by maintaining stability. Affected by the fact that Bagang has delivered less resources recently, some local specifications are out of stock, and businesses are also reluctant to sell. However, the overall structural adjustment pressure of the steel industry is obvious, and there are downside risks to economic growth. In addition, the overall performance of the manufacturing industry is still relatively sluggish,St. asentSelf propelled hollow grouting anchor manufacturer, and the price policy of first-line steel mills in October also maintained a stable but declining tone. At present, the overall fundamentals of the steel market remain negative. Near the end of the month, the pressure of the grouting pipe steel traders to withdraw funds and the tightening tone of the central bank's monetary policy kept the overall liquidity tight. In addition, the differentiation of cold and hot-rolled price trends combined with the decline of the overall profitability of the current steel industry will make steel mills or increase their power to produce current star products. Therefore,St. asentLeading small conduit manufacturer, we still need to be vigilant about the hot-rolled market, and there will not be much reversal in the short term. From the performance of the internal and external markets, the game between the long and short sides is prominent, and the short side increases the price, which makes the iron ore market rise and touch the wall. It is expected that the iron ore will maintain the interval fluctuation state in the near future, and the fluctuation space of the grouting pipe is limited. This method can seal the joint. The grouting time can be selected after the concrete curing. Leakage joints can also be permanently sealed in this way. Manufacturing method of fast cutting device in the hole of underground grouting pipe [Patent Abstract] the utility model discloses a fast cutting device in the hole of underground grouting pipe, which is mainly composed of a fixed cutting device , a tension blade device and a cutting rotation device . The tension blade device is sleeved in the cutting rotation device. The tension blade device and the cutting rotation device are connected by threads, A blade tightening nut is arranged at one end of the tightening blade device extending out of the cutting rotating device. The cutting blade and pulley are fixed and installed on both sides of the cutting rotating device. The utility model is arranged in the grouting pipe, which reduces the operating intensity of workers by using the lead screw principle. The rotary cutting in the casing reduces the quantities of clearing the tunnel floor; The cutting depth can also be adjusted at will according to the actual situation of the roadway. The working efficiency is 4-5 times higher than that of manual cutting, which can greatly reduce the labor intensity of workers.

The concrete shall be evenly distributed and the vibration shall be &fast inserting and slow pulling& and slightly pumped up and down to make the concrete vibrate evenly. The vibration shall be carried out in sequence to avoid over vibration and missing vibration until the concrete surface is horizontal, no significant subsidence, no bubbles and no mortar on the surface. During vibration, the vibrating handle shall not touch the side formwork, grouting pipe, pipeline, embedded parts, etc.

100 * 100 * 6mm grouting pipe made of q195b. 196kg per meter, 1076kg per piece. Results the average weight of 10 100 * 100 * 6mm grouting pipes was 1026kg, with a difference of 15kg per ton. It can be imagined how big the gap is when the one foot rate of retreat is large.

Honest service.The cement grouting method is applicable to the grouting of gravel layer and rock fissure. Ordinary portland cement is generally used, the water cement ratio is 1:1, and 2% ~ 5% water glass can be added as the accelerator. Ordinary extrusion mortar pump is used for grouting, and the maximum grouting pressure shall not exceed 1MPa. For silty fine sand and cohesive soil with permeability coefficient less than 10-4cm / s, split grouting can be adopted. The consistency of the cement slurry used for split grouting is large, and the water cement ratio is 0.45 ~ 0.60. Flower tube method and one-way valve tube method are adopted for grouting. The maximum pressure of grouting is generally greater than 4MPa.

Welding is strictly prohibited during use, because the strength of the welding point is much lower than that of the steel itself, and it is easy to cause broken wires at the welding point during tensioning. When the grouting pipe adopts circular reinforcement arrangement, but the excessive strength will be harmful to the quality of the upsetting head. Therefore, when you choose the upsetting head anchor you should explain it in detail to the manufacturer in the order.

During concrete construction, special personnel shall be assigned to take care of the reserved and embedded reinforcement formwork and water and electricity to prevent deformation and displacement. In addition, the calendering of the component surface and the roughening of the laminated plate surface shall be carried out in time.

St. asent.Grouting pipe is a tubular waterproof sealing material used for grouting of concrete construction joints.

At present, Wuhan University of technology has completely replaced cement clinker with ground industrial waste slag (fly ash, slag and steel slag) and successfully prepared a new type of two liquid grouting material with different gel time (3 ~ 300 s), high consolidation strength (~ 25 MPa) and stone rate of by using water glass to stimulate industrial waste slag, which has been successfully applied in the construction of Wuhan Yangtze River Tunnel [6].

The setting and curing reaction of cement water glass slurry includes cement hydration reaction and the reaction of Ca (OH) 2, the product of cement hydration reaction, with water glass, that is, after cement and water are mixed into cement slurry, Ca (OH) 2 with strong activity is produced due to hydrolysis and hydration; Water glass interacts with Ca (OH) 2 to form a gel with certain strength - calcium silicate hydrate. The reaction is as follows [2].