What matters need to be paid attention to when reinforcing foundation grouting

The grouting reinforcement method is one of the methods for strengthening the foundation, which is mainly used in the reinforcement of sand, cohesive soil and other foundations, which can prevent seepage and plug leakage and improve the strength of the foundation. belowReinforcement of young and middle-aged buildingsLet's talk about the matters that need to be paid attention to when reinforcing foundation grouting and reinforcement.

1.The grouting pressure can split, compact, and impregnate the soil layer, and the excessive pressure may cause the overlying soil layer to rise up, and the grout rises upward.

2.When the grout has not been solidified, it is equal to the external load that increases the reinforcement member, and the original bearing layer is disturbed when the grouting is carried out, which may cause additional settlement, and for such sensitive structures, one hole or several holes can be used to skip injection, and the interval time is more than 3 days as far as possible.

3.When grouting and reinforcing the pebble layer or the soil layer with relatively large hydrodynamic pressure, it is necessary to mix the grout with an accelerator, and intermittent grouting can also be used.

4.During construction, it should be monitored at any time, and if there is a sudden drop or rise in pressure, or when the slurry is abnormal, the cause of the fault should be identified in time and measures should be taken.

5.The grouting test was carried out 28 days after the end of grouting and the uniformity of the reinforced stratum was detected by standard penetration and static cone penetration.

6.Samples are taken every 1 m over the entire depth range of the reinforced soil to confirm its compressibility, strength, or permeability.

That's all it saysReinforcement of young and middle-aged buildings

Foundation reinforcement grouting 40 meters.

Cement grouting foundation refers to a kind of grouting foundation, which evenly injects cement slurry into the soil through the grouting pump and grouting pipe, and drives away the water and gas in the rock cracks or between the soil particles by filling, infiltrating and compacting, etc., and fills its position, and after it hardens, the rock and soil are cemented into a whole.

The formation of a new rock and soil mass with high strength, low compressibility, high impermeability and good stability strengthens the foundation and can prevent or reduce infiltration and uneven settlement. The holding point of this foundation is that it is easy to obtain materials, easy to operate, and is cheap, and is suitable for the reinforcement of soft clay, silt, cohesive soil, sandy soil foundation and the waterproof reinforcement of soil layer with a permeability coefficient greater than 10-7cms.

Before the foundation is reinforced by grouting and reinforcing the foundation, the length of the grouting section, the distance between the grouting holes, the grouting pressure and other relevant technical parameters should be determined through the test. The length of the grouting section is selected according to the conditions of soil cracks, looseness, permeability and grouting equipment capacity. Under general geological conditions, the length of the section is mostly controlled at 5 6 m.

In the case of serious looseness, crack development and strong permeability, it should be 2 4 m. The distance between grouting holes should generally not be greater than m, and the diameter range of single hole reinforcement can be considered as 1 2 m.

The depth of the hole depends on the depth of reinforcement of the soil layer. The grouting pressure refers to the full pressure of the grouting section, that is, the pressure indicated on the pressure gauge at the orifice, and the pressure used depends on the depth of the borehole, the permeability of the soil and the consistency of the cement slurry, etc., generally MPA.

Foundation refers to the soil or rock mass underneath the building that supports the foundation. The soil layer that serves as the foundation of a building is divided into rock, gravel soil, sand, silt, clayey soil and artificial fill. There are two types of foundations: natural foundations and artificial foundations (composite foundations).

A natural foundation is a natural layer of soil that does not need to be reinforced by man. Artificial foundations need to be reinforced, and there are stone chip cushions, sand cushions, mixed ash backfill and then tamping, etc.

Subsoil refers to the part of the soil that is subjected to the load of the superstructure. The soil or rock mass below the foundation that bears the full load of the building is called the foundation. The foundation is not an integral part of the building, but it plays a very important role in ensuring the durability of the building and is part of the earth.

From the perspective of on-site construction, the foundation can be divided into natural foundation and artificial foundation. The foundation is the rock and soil bearing layer under the pressure under the foundation. The natural foundation is a natural soil layer that can meet the requirements of bearing all the loads of the foundation in a natural state and does not need to be reinforced by man, which saves the project cost and does not need to be manually treated.

A natural foundation is a natural soil layer in which the foundation can be placed directly without the need to treat the foundation. It is divided into four main categories: rock, gravel soil, sandy soil, and cohesive soil.

Artificial foundation: A foundation that has been artificially treated or improved. When the geological condition of the soil layer is good and the bearing capacity is strong, the natural foundation can be used; And under the condition of poor geological conditions, such as slope, sand or silt geology, or although the texture of the soil layer is good, but the upper load is too large, in order to make the foundation have sufficient bearing capacity, it is necessary to adopt artificial reinforcement foundation, that is, artificial foundation.

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Answer: foundation reinforcement grouting 300 yuan a meter, professional foundation reinforcement engineer according to the market ** is 300 yuan a meter. This ** is not high or low, if you find some private people to do it, it may be two hundred and one disadvantages, but if you find a regular company to do foundation grouting reinforcement** is generally in accordance with 300 yuan a meter**.

The foundation reinforcement grouting is not fixed, and the first meter of the first meter is at least 100 yuan to 300 yuan, and the market is not the same. If you want to strengthen the foundation, you must first understand the corresponding **, and it is also necessary to combine the actual situation, the foundation sinking must be reinforced, but it is also necessary to combine the actual situation of sinking to deal with, when reinforcing can use sand, silt or artificial stupid car fill to reinforce the foundation, and the foundation will be more stable after reinforcement.

40 a meter. 1. The treatment method of grouting and reinforcement of weak soil is to choose the grout with cement as the main agent, or the two-liquid mixed grout of cement and water glass. Pressure grouting reinforcement refers to the use of hydraulic over-air pressure can solidify the grout evenly injected into the packing formation, slurry filling, infiltration and compacting and other ways, drive away the moisture and air between the soil particles and fill its position, after a certain period of time, the grout will be the original loose soil particles cemented into a whole.

For the treatment of weak soil, the slurry with cement as the main agent can be selected, and the two-component mixed slurry of cement and water glass can also be selected. In the presence of groundwater flow, a single-component cement slurry should not be used. The spacing of the grouting holes is desirable, and the reinforced soil should be connected into a whole within the plane and depth range.

2. The spacing of the grouting holes is between, so that the reinforced foundation is a whole in the plane and depth range. Grouting is divided into cement grout, chemical cracking grout, and mixed grout according to the material, and is divided into rock grouting, gravel grouting, clay grouting, coal body grouting, coal rock mass groutingAccording to the function, it is divided into anti-seepage grouting, reinforcement grouting, and foundation underpinning grouting. The grouting plug grouting construction is to use the pneumatic rock drill to drill on the road slab, the hole is deep to the design reinforcement depth, the orifice is closed with a grouting plug, and then through the grouting plug, the grouting pipe is connected to the grouting pump to evenly inject the pre-prepared grout into the void at the bottom of the slab, the base layer under the slab, the subgrade fill soil and the foundation, and drive away the bottom of the slab by filling, infiltrating, compacting, etc., and occupy its position after the water and air in the cracks in the base layer to make it reinforced.

3. In the cohesive soil foundation, the grout injection rate is 15%-20%, and the thickness of the covering soil on the grouting point should be greater than 2m. Grouting is to let cement or other grout in the surrounding soil through infiltration, filling, compacting expansion to form a slurry vein, pile column body and compacted foundation soil to form a composite foundation, interact with each other to control settlement, improve the bearing capacity. The grouting reinforcement method is suitable for foundation reinforcement such as sand, silt, cohesive soil and artificial fill.

It is generally used to prevent seepage and plug leakage, improve the strength and deformation modulus of foundation soil, and control formation settlement. The root pile method is suitable for the repair and addition of existing buildings on the foundation soil such as silt, silty soil, cohesive soil, silt, sand, gravel soil and artificial fill, the renovation of ancient buildings, and the crossing of underground closed railways.

Dear, hello, I am glad to answer for youA: Foundation reinforcement grouting is 300 yuan a meter, foundation reinforcement grouting 300 yuan a meter, professional foundation reinforcement engineer according to the market ** is 300 yuan a meter. This ** is not high or low, if you find some private people to do it, it may be two hundred and one meters, but if you find a regular company to do the foundation annihilation grouting reinforcement** is generally in accordance with 300 yuan a meter**.

The foundation reinforcement grouting is not fixed, and the first meter of one meter is at least to be 100 yuan to 300 yuan, and now the market is different. If you want to reinforce the foundation, you must first understand the corresponding **, and it is also necessary to combine the actual situation, the foundation must be reinforced, but it is also necessary to combine the actual situation of the subsidence to deal with, when reinforcing the sand, silt or artificial fill to reinforce the foundation, the foundation will be more stable after reinforcement.

If you find some private round chains to do, it may only cost one or two hundred yuan a meter. However, if you find a regular platform to do foundation grouting reinforcement, the price is generally about 250 yuan per meter.

Generally, this cost is calculated based on the size, depth and soil condition of the reinforced area.

First of all, the size of the reinforcement area has a great impact on the grouting cost. In general, the larger the reinforcement area, the higher the material and labor costs required. In addition, the depth of reinforcement is also one of the factors that affect **.

Secondly, the condition of the soil layer will also have an impact on the grouting cost. If the soil layer is relatively soft, the degree of reinforcement of the buried cavity foundation may be larger, so the ** reinforcement grouting will also increase accordingly. In addition, if the soil layer is relatively hard, the difficulty and cost of reinforcement are relatively low.

Therefore, when determining the cost of grouting costs, the soil condition of the foundation must be considered.

If you have any questions related to foundation reinforcement, you can ask questions to Wuli Reinforcement Detection!