CN101928126B - Embankment rapid rescue reinforcement material and embankment rapid rescue reinforcement construction method - Google Patents

Abstract

Rapid emergency reinforcement materials for embankments and construction methods for rapid emergency reinforcement of embankments. The composition of the reinforcement material is Portland cement and quick-setting curing agent; Portland cement accounts for 70-90%; quick-setting curing agent accounts for 10-30%; Calcium; the mass ratio of the three is 40~60:30~40:10~20. The preparation method is to first mix sodium aluminate, sodium chloride, and calcium oxide evenly to make a quick-setting curing agent; then make a quick-rescue reinforcement material together with Portland cement; weigh the soil, quick-rescue reinforcement material, and water in proportion ; Use the pumping pressure of the screw pump and the water-permeable mold bag at the outlet end and the weight of the mixture to squeeze out the water, reduce the water-binder ratio, and accelerate the condensation and hardening of the mixture. . The invention improves the durability of emergency reinforcement materials, can protect the environment, has strong adaptability to bad weather, improves construction efficiency and reduces costs.

Description

Embankment rapid emergency reinforcement material and embankment rapid emergency reinforcement construction method

technical field

The invention relates to an engineering material and a construction process, in particular to a rapid embankment reinforcement material and a rapid embankment reinforcement construction method using the embankment rapid rescue reinforcement material. It is mainly used in the field of embankment emergency reinforcement in water conservancy projects, and can quickly solve problems such as embankment leakage, piping, and slope instability.

Background technique

Type the technical field description paragraph here. At present, the materials used for embankment reinforcement in China are mainly cement concrete, masonry blocks, and soil. On the one hand, the use of cement concrete and mortar blocks to strengthen the embankment is greatly affected by the weather, and the reinforcement work cannot be carried out normally in rainy and snowy weather. Especially in the process of emergency plugging, the dangerous situation of the embankment cannot be removed in time, and there are potential safety hazards; secondly, cement After the embankment is reinforced with concrete and mortar block stones, the original ecological balance is destroyed, and the plants and animals on the shore cannot survive normally; again, the construction method of cement concrete and mortar block stone reinforcement embankment is relatively primitive, which wastes a lot of manpower and material resources, and the cost is relatively high. high.

The main problems of embankment reinforcement with soil are: 1. The soil itself has low consolidation strength, cannot withstand the long-term erosion and erosion of water flow, and the durability of materials is poor; 2. In severe weather such as emergency plugging, rain and snow, a single Due to its own defects, the soil body is not suitable for emergency rescue materials.

At present, there are many kinds of soil curing agents in China. For example, Yue Tao and Ni Wen of Beijing University of Science and Technology invented a soil curing agent called SSK. Its main components are lime and solid waste. This soil curing agent is added After soil mass, its 3d compressive strength can reach about 1.6MPa, and its 7d compressive strength can reach about 3.0MPa; The performance has been studied, and their research results show that: after adding HAS soil curing agent to the soil, its 7d, 14d, 28d compressive strength can reach: 3.9MPa, 4.5MPa, 5.1MPa; After adding special soil stabilizer, its 14d, 28d compressive strength can reach 4.3 MPa, 5.0 MPa. According to a large number of research literatures, at present, the promotion effect of soil curing agent on the soil strength is mainly manifested after 3 days. For dangerous situations such as embankment leakage and piping, the setting and hardening time is too long, and the dangerous situation cannot be eliminated in time. This kind of soil curing agent is not suitable for the quick relief and reinforcement of embankments. In the case of extreme bad weather in recent years, it is necessary to develop a soil curing agent with short setting and hardening time and fast strength development.

At present, the transportation of embankment reinforcement materials mainly includes manual transportation and conveyor belt transportation. Manual transportation is time-consuming and laborious, and the work efficiency is too low; conveyor belt transportation requires the soil to be dry and hard, and is greatly affected by the weather. Therefore, it is necessary to develop a conveying device that can adapt to bad weather to quickly solve the dangerous embankment in bad weather. .

Contents of the invention

In view of the deficiencies in current embankment emergency reinforcement materials and construction techniques, the purpose of the present invention is to provide a rapid embankment emergency reinforcement material and a rapid embankment reinforcement construction method using the embankment rapid emergency reinforcement material; it is mainly used in the field of water conservancy engineering embankment emergency reinforcement , can quickly solve problems such as embankment leakage, piping, and slope instability, so as to reduce costs and improve construction efficiency. It is fast and feasible in the process of emergency plugging, and can protect the surrounding environment of embankments.

The scheme of finishing above-mentioned invention task is, a kind of embankment quick rescue reinforcement material, its main component is as follows:

Portland cement, quick-setting curing agent. Among them, Portland cement accounts for 70-90 parts of the total mass; the quick-setting curing agent accounts for 10-30 parts of the total mass. The application recommends that the optimum mass ratio of the two is: portland cement accounts for 80 parts of the total mass; quick-setting curing agent accounts for 20 parts of the total mass.

The main components of the quick-setting curing agent are: sodium aluminate, sodium chloride, and calcium oxide; the mass ratio of the three is: 40-60:30-40:10-20. On the basis of a large number of experiments, this application recommends that the best mass ratio of the three is: 50:35:15.

When in use, it is better to weigh the soil, fast emergency reinforcement materials and water according to a certain ratio. The mass ratio of the three is: 50-70:4-16:20-40. On the basis of a large number of tests, this application recommends the combination of the three The best mass ratio is: 65:10:25.

The scheme for completing the 2nd invention task of the present application is a construction method for fast emergency reinforcement of embankments using the above-mentioned embankment rapid emergency reinforcement materials, and the steps are as follows:

⑴. Weigh sodium aluminate, sodium chloride, and calcium oxide according to the above mass ratio, and stir evenly to make a quick-setting curing agent;

⑵, Portland cement and quick-setting curing agent are weighed according to the above mass ratio, and stirred evenly to make a rapid reinforcement material;

⑶. Weigh the soil, rapid reinforcement material and water according to a certain ratio. The mass ratio of the three is: 50-70:4-16:20-40. On the basis of a large number of tests, this application recommends the best of the three. The best mass ratio is: 65:10:25. Stir with a forced mixer for 3-5 minutes;

(4) Pour the material obtained in step (3) into the screw pump, and transport the mixture to the designated construction site through the extrusion of the screw pump;

⑸. Use a permeable mold bag at the outlet of the screw pump to accept the mixture delivered by the screw pump;

⑹. Use the pumping pressure and the weight of the mixture to squeeze out the water in the mixture, reduce the water-binder ratio, and achieve rapid solidification of the soil, which is used for embankment emergency rescue, seepage prevention and plugging, and danger relief and reinforcement.

The optimization scheme of the above method is,

Described step (1) is in dry mixer, stirs 30min, makes quick-setting curing agent;

Described step (3) is to stir 3min-5min in mixer;

In the step (4), before the mixture is transported to the construction site through the extrusion of the screw pump, the following steps are added;

⑷-1. Filter the solid stones larger than 15mm through the vibrating screen, and the mixture passing through the vibrating screen leaks into the feed port of the screw pump; then the mixture is transported to the construction site through the extrusion of the screw pump;

The permeable mold bag in the step (5) is recommended by this application, and its diameter is 30 cm to 40 cm, and its length is 1.0 m to 2.0 m;

The step (6) uses the pumping pressure and the weight of the mixture to squeeze out the water in the mixture for 30 minutes to 120 minutes, and the unconfined compressive strength of the soil can reach 0.8 MPa-2.5 MPa, which can be used for embankment protection. Seepage plugging and danger elimination reinforcement.

In other words, the best approach is to follow these specific steps:

(1) Weigh sodium aluminate, sodium chloride and calcium oxide according to the above mass ratio, put them into a dry mixer, and stir for 30 minutes to make a quick-setting curing agent;

⑵. Weigh Portland cement and quick-setting curing agent according to the above mass ratio, put them into the mixer, and stir them evenly to make fast emergency reinforcement materials;

On the basis of a large number of experiments, this application recommends that the best mass ratio of the three is: 50:35:15. Quick emergency reinforcement materials, soil and water are weighed according to a certain ratio, put into the concrete mixer, stir in the mixer for 3-5min, and pour the mixture on the vibrating screen;

⑷. Filter the solid stones larger than 15mm through the vibrating screen, and the mixture through the vibrating screen leaks into the feed port of the screw pump, and the mixture is transported to the construction site through the extrusion of the screw pump;

⑸. At the outlet of the screw pump, use a water-permeable mold bag with a diameter of 30cm-40cm and a length of 1.0m-2.0m to accept the mixture delivered by the screw pump;

⑹. Use the pumping pressure and the weight of the mixture to squeeze out the water in the mixture. After 30 minutes to 120 minutes, the unconfined compressive strength of the soil can reach 0.8 MPa-2.5 MPa, which can be used for embankment rescue, Seepage prevention and plugging, danger elimination and reinforcement.

The equipment used in the construction of embankment rapid emergency reinforcement materials is: concrete mixer, vibrating screen with a screen hole diameter of 15mm, screw pump, and water-permeable membrane bag.

Compared with traditional reinforcement materials and construction techniques, the "rapid emergency reinforcement material for embankment and embankment rapid emergency reinforcement construction method" of the present invention has the following advantages:

1. The setting and hardening time is short and the strength develops quickly

At present, the unconfined compressive strength of domestic soil curing agent is between 1.0 MPa and 3.5 MPa in 3 days and 7 days. After 30min-120min of the material, the unconfined compressive strength of the soil can reach 0.8 MPa-2.5 MPa, which can be quickly used for embankment rescue, seepage prevention and plugging, and danger relief reinforcement.

2. Strong adaptability to bad weather

At present, the embankment reinforcement materials are transported manually or by conveyor belts. On the one hand, it is time-consuming and labor-intensive. On the other hand, the state of the materials is high. The third point is that it is significantly affected by the weather. Under extremely harsh conditions, the current delivery methods are therefore subject to certain restrictions.

The construction process of the present invention is all mechanized, and the mixture can be transported to the designated construction site with a screw pump according to the project requirements, and the transport process is not eroded by rain and snow to ensure stable material performance.

The embankment emergency reinforcement material produced by the present invention is packed in a water-permeable mold bag. On the one hand, the water-permeable mold bag plays a water-permeable role, and on the other hand, it plays a role in protecting the fresh mixture, so that the fresh mixture will not be damaged by rain and snow. After 30min-120min of erosion, the unconfined compressive strength of the soil can reach 0.8 MPa-2.5 MPa, which can be quickly used for embankment rescue, seepage prevention and plugging, and danger relief reinforcement.

3. Improve the durability of emergency reinforcement materials

Through stirring, the ordinary Portland cement and the quick-setting curing agent are evenly distributed into the soil, and the quick-setting curing agent is used to stimulate the active ingredients in the ordinary Portland cement and the soil, and through the ordinary Portland cement and the active ingredients in the soil Condensation and hardening increase the consolidation strength of the soil; the compaction of the soil is increased by the extrusion of the mixture during the conveying process by the screw pump. After the consolidation strength and compactness of the soil are improved, the ability of the revetment soil to resist water erosion and water erosion is significantly improved.

4. Protect the environment

By using rapid reinforcement materials to strengthen the embankment, the original ecological balance can be maintained, which is conducive to the growth of vegetation on the bank and provides a habitat for the survival of animals on the bank.

5. Improve construction efficiency

The construction process of the present invention is all mechanized, and the production efficiency per unit time of the machine can be adjusted by adjusting the motor type of the screw pump. A single machine can produce up to 200m ³ mixture per hour, and can transport the mixture to the designated construction site according to the engineering needs.

6. Reduce costs

The main components of the embankment reinforcement mixture produced by the invention are soil, ordinary Portland cement and quick-setting curing agent, and compared with cement concrete and mortar block stones, the cost of materials is reduced.

The construction technology of the present invention is all mechanized, requires less labor during production, and can reduce labor costs.

The construction efficiency of the invention is high, the construction period can be shortened, and capital turnover can be improved.

Detailed ways

Example 1,

The specific implementation steps for preparing fast emergency reinforcement materials and construction techniques are as follows:

1. Weigh a certain amount of sodium aluminate, sodium chloride and calcium oxide according to the mass ratio of 50:35:15, put them into a dry mixer, and stir for 30 minutes to make a quick-setting curing agent;

2. Weigh ordinary portland cement and quick-setting curing agent according to a certain quality ratio, put them into the mixer, and stir them evenly to make a quick emergency reinforcement material. Among them, Portland cement accounts for 80% of the total mass; quick-setting curing agent accounts for 20% of the total mass.

3. Weigh the soil, fast reinforcement materials and water according to a certain ratio, put them into the concrete mixer, stir in the mixer for 3min -5min, and pour the mixture on the vibrating screen;

4. Filter the solid stones larger than 15mm through the vibrating screen, the mixture through the vibrating screen leaks into the feed port of the screw pump, and the mixture is transported to the construction site through the extrusion of the screw pump;

5. At the outlet of the screw pump, use a permeable mold bag with a diameter of 30cm-40cm and a length of 1.0m-2.0m to accept the mixture delivered by the screw pump;

6. Use the pumping pressure and the weight of the mixture to squeeze out the water in the mixture. After 30 minutes to 120 minutes, the unconfined compressive strength of the soil can reach 0.8MPa-2.5MPa, which can be quickly used for embankment rescue, Seepage prevention and plugging, danger elimination and reinforcement.

Embodiment 2 is basically the same as Embodiment 1, but has the following changes: wherein, the quality of Portland cement accounts for 70% of the total mass; the quality of the quick-setting curing agent accounts for 30% of the total mass; sodium aluminate, sodium chloride, Calcium oxide; the mass ratio of the three is: 40:40:20.

The mass ratio of soil, rapid rescue reinforcement materials and water is 65:10:25.

Embodiment 3 is basically the same as Embodiment 1, but has the following changes: wherein, the quality of Portland cement accounts for 90% of the total mass; the quality of the quick-setting curing agent accounts for 10% of the total mass; sodium aluminate, sodium chloride, Calcium oxide; the mass ratio of the three is: 50:30:20.

The mass ratio of soil, rapid rescue reinforcement materials and water is 50:4:20.

Embodiment 4 is basically the same as Embodiment 1, but has the following changes: wherein, the quality of Portland cement accounts for 80% of the total mass; the quality of the quick-setting curing agent accounts for 20% of the total mass; sodium aluminate, sodium chloride, Calcium oxide; the mass ratio of the three is: 60:30:10.

The mass ratio of soil, fast rescue reinforcement material and water is 70:16:40.

Embodiment 5 is basically the same as Embodiment 1, but has the following changes: wherein, the quality of Portland cement accounts for 85% of the total mass; the mass ratio of the quick-setting curing agent accounts for 15% of the total mass; sodium aluminate, sodium chloride , calcium oxide; the mass ratio of the three is: 40:30:30.

The mass ratio of soil, fast rescue reinforcement materials and water is 50:16:20.

Example 6 is basically the same as Example 1, but with the following changes: among them, sodium aluminate, sodium chloride, and calcium oxide; the mass ratio of the three is: 55:30:15.

The mass ratio of soil, rapid rescue reinforcement material and water is 70:4:40.

Example 7 is basically the same as Example 1, but with the following changes: among them, sodium aluminate, sodium chloride, and calcium oxide; the mass ratio of the three is: 40:40:20.

The mass ratio of soil, rapid rescue reinforcement materials and water is 50:4:40.

Example 8 is basically the same as Example 1, but with the following changes: among them, sodium aluminate, sodium chloride, and calcium oxide; the mass ratio of the three is: 50:40:10.

Claims (9)

1. embankment reinforcement material of speedily carrying out rescue work fast is characterized in that, forms as follows:

Silicate cement and quick solidifying agent; Wherein the quality of silicate cement accounts for the 70-90 of total mass; The quality of quick solidifying agent accounts for the 10-30 of total mass;

The composition of quick solidifying agent is: sodium aluminate, sodium-chlor, quicklime; Three's mass ratio is 40-60:30-40:10-20.

2. the embankment according to claim 1 reinforcement material of speedily carrying out rescue work fast is characterized in that the mass ratio of said silicate cement accounts for 80 of total mass; The mass ratio of said quick solidifying agent accounts for 20 of total mass.

3. the embankment according to claim 1 and 2 reinforcement material of speedily carrying out rescue work fast is characterized in that said sodium aluminate, sodium-chlor, quicklime three's mass ratio is: 50:35:15.

4. the embankment according to claim 3 reinforcement material of speedily carrying out rescue work fast is characterized in that described embankment is speedily carried out rescue work reinforcement material in use fast, and soil, the speedily carry out rescue work mass ratio of reinforcement material and water is 50-70:4-16:20-40 fast.

5. the embankment according to claim 4 reinforcement material of speedily carrying out rescue work fast is characterized in that, soil, the speedily carry out rescue work mass ratio of reinforcement material and water is 65:10:25 fast.

6. one kind is used the described embankment of claim 1 embankment of the reinforcement material reinforced construction method of speedily carrying out rescue work fast of speedily carrying out rescue work fast, it is characterized in that step is following:

⑴., stir than weighing sodium aluminate, sodium-chlor, quicklime by quality, process the quick solidifying agent;

⑵. better than weighing silicate cement, quick solidifying agent by quality, stir, process the reinforcement material of speedily carrying out rescue work fast;

⑶. with soil, speedily carry out rescue work that weighing is good according to a certain percentage for reinforcement material and water fast, three's mass ratio is 50-70:4-16:20-40; With forcing the examination stirrer to stir 3-5 minute;

⑷. the material with step ⑶ obtains is transported to the job location to mix through the spiral pump squeezing action;

⑸. the exit end at spiral pump is accepted the mix that spiral pump transfers out with permeable mould bag;

⑹. utilize pumping pressure and mix own wt to push the moisture in the mix out, be used for the speedily carrying out rescue work of embankment, impervious leakage-stopping, reinforcement;

Wherein the quality of silicate cement accounts for the 70-90 of total mass; The quality of quick solidifying agent accounts for the 10-30 of total mass;

The staple of quick solidifying agent is: sodium aluminate, sodium-chlor, quicklime; Three's mass ratio is: 40-60:30-40:10-20.

7. the embankment according to claim 6 reinforced construction method of speedily carrying out rescue work fast is characterized in that,

Said step ⑴ is in dry whisking appliance, stirs 30min, processes the quick solidifying agent;

Said step ⑶ stirs 3min-5min in stirrer;

Said step ⑷ is being transported to mix through the spiral pump squeezing action before the job location, and increasing has following steps;

⑷-1 filters out the solid stone greater than 15mm through vibratory screening apparatus, and the mix through vibratory screening apparatus leaks into spiral pump opening for feed; And then be transported to the job location to mix through the spiral pump squeezing action;

The diameter of the permeable mould bag among the said step ⑸ is 30cm～40cm, the long 1.0cm～2.0m of being;

" being used for the speedily carrying out rescue work of embankment, impervious leakage-stopping, reinforcement " among the said step ⑹ is to utilize the 30min～120min after pumping pressure and mix own wt push the moisture in the mix out to carry out.

8. the embankment according to claim 6 reinforced construction method of speedily carrying out rescue work fast is characterized in that the mass ratio of said silicate cement accounts for 80 of total mass; The mass ratio of said quick solidifying agent accounts for 20 of total mass; Said sodium aluminate, sodium-chlor, quicklime; Three's mass ratio is: 50:35:15.

9. according to the described embankment of one of the claim 6-8 reinforced construction method of speedily carrying out rescue work fast, it is characterized in that described soil, the speedily carry out rescue work mass ratio of reinforcement material and water is 65:10:25 fast.