阅读说明：本技术 注浆液、制备方法及其在溶蚀破碎带加固处理中的应用 (Grouting liquid, preparation method and application of grouting liquid in corrosion crushing zone reinforcement treatment ) 是由 周云龙 吴东华 刘波 林义华 彭兴友 赵相停 邓勇 陈小兵 于 2021-08-25 设计创作，主要内容包括：本申请涉及一种注浆液、制备方法及其在溶蚀破碎带加固处理中的应用,涉及破碎带加固技术领域,其中注浆液由包括以下重量份的原料制成：水泥60-90、砂80-100、膨润土28-36、木粉5-10、玻璃微珠80-150、复合发泡剂1.2-2、悬浮剂12-16、分散剂4-8、水460-600；其中,复合发泡剂由动物性水泥发泡剂和十二烷基硫酸钠组成,玻璃微珠与木粉的重量比为1-3；制备方法包括以下步骤：按配比重量将悬浮剂和分散剂溶于水中混合均匀,加入玻璃微珠浸泡,充分搅拌后形成悬浮液；将木粉加入悬浮液中搅拌均匀,再加入发泡剂混合均匀形成混合液；将水泥、砂、膨润土混合搅拌均匀形成混合料；将混合液与混合料混合,加入早强剂搅拌均匀得到注浆液。该申请具有对破碎带快速加固的优点。(The application relates to grouting liquid, a preparation method and application thereof in corrosion broken belt reinforcement treatment, relating to the technical field of broken belt reinforcement, wherein the grouting liquid is prepared from the following raw materials in parts by weight: 60-90 parts of cement, 80-100 parts of sand, 28-36 parts of bentonite, 5-10 parts of wood powder, 80-150 parts of glass beads, 1.2-2 parts of composite foaming agent, 12-16 parts of suspending agent, 4-8 parts of dispersing agent and 460 parts of water as 600; wherein the composite foaming agent consists of an animal cement foaming agent and lauryl sodium sulfate, and the weight ratio of the glass beads to the wood powder is 1-3; the preparation method comprises the following steps: dissolving the suspending agent and the dispersing agent in water according to the weight ratio, uniformly mixing, adding the glass beads for soaking, and fully stirring to form a suspension; adding the wood powder into the suspension, uniformly stirring, adding the foaming agent, and uniformly mixing to form a mixed solution; mixing and stirring cement, sand and bentonite uniformly to form a mixture; and mixing the mixed solution with the mixture, adding the early strength agent, and uniformly stirring to obtain the grouting liquid. This application has the advantage of consolidating fast to broken area.)

1. A grouting fluid, characterized in that: the feed is prepared from the following raw materials in parts by weight:

60-90 parts of cement, 80-100 parts of sand, 28-36 parts of bentonite, 5-10 parts of wood powder, 80-150 parts of glass beads, 1.2-2 parts of composite foaming agent, 12-16 parts of suspending agent, 4-8 parts of dispersing agent and 460 parts of water as 600; wherein the composite foaming agent consists of an animal cement foaming agent and lauryl sodium sulfate, and the weight ratio of the glass beads to the wood powder is 1-3.

2. The grouting liquid according to claim 1, characterized in that: the grouting liquid is prepared from the following raw materials in parts by weight: 60-90 parts of cement, 80-100 parts of sand, 28-36 parts of bentonite, 7-9 parts of wood powder, 100-120 parts of glass beads, 1.5-2 parts of composite foaming agent, 12-16 parts of suspending agent, 4-8 parts of dispersing agent and 460-600 parts of water; wherein the composite foaming agent consists of an animal cement foaming agent and lauryl sodium sulfate, and the weight ratio of the glass beads to the wood powder is 1.1-1.7.

3. The grouting liquid according to claim 1, characterized in that: the grouting liquid also comprises 2.5-5 parts of an early strength agent.

4. The grouting liquid according to any one of claims 1 to 3, characterized in that: the grouting liquid also comprises 10-15 parts of hydroxymethyl cellulose.

5. The grouting fluid of claim 1, characterized in that: the grain size of the wood powder is 40-70 meshes.

6. The method of producing a slip casting according to any one of claims 1 to 5, wherein: the method comprises the following steps:

dissolving the suspending agent and the dispersing agent in water according to the weight ratio, uniformly mixing, adding the glass beads for soaking, and fully stirring to form a suspension;

adding the wood powder into the suspension, uniformly stirring, adding the foaming agent, and uniformly mixing to form a mixed solution;

mixing and stirring cement, sand and bentonite uniformly to form a mixture;

and mixing the mixed solution with the mixture, adding the early strength agent, and uniformly stirring to obtain the grouting liquid.

7. The method of producing a grouting liquid according to claim 6, characterized in that: and (3) carrying out ultrasonic oscillation on the mixed solution for 30-60min, wherein the ultrasonic oscillation frequency is 25KHz-28 KHz.

8. Use of the grouting according to any one of claims 1 to 3 in a reinforcement treatment of erosion fracture zones.

Technical Field

The application relates to the technical field of reinforcing of broken belts, in particular to grouting liquid, a preparation method and application of the grouting liquid in reinforcing treatment of an erosion broken belt.

Background

The mountain bodies on two sides of the river channel can crack due to the deformation of geological motion, and broken rocks can cause harm to navigation channels and overwater operating personnel if falling. In order to ensure the passage safety of the channel, the mountain bodies on both sides of the channel need to be surveyed so as to find potential risks in advance and perform prevention and treatment.

In the prior art, a guide rockfall prevention flexible net is generally hung on the surface of a rock, and rockfall is buffered by using a protective net. The protective net is fixed on the rock mass through an anchor cable.

The inventor considers that the technical scheme has the following defects: in the reconnaissance process, local rock mass is in basic stable state at present, but has the trend that deformation rate increases, because the volume is huge, in case dangerous rock mass forms, prevents falling flexible net and can't play a role, and at this moment administers the degree of difficulty and the safety risk is big. When the phenomena need to be found, dangerous rock bodies and mountain bodies are anchored by using the anchor cables, however, rock bodies on two sides of a river channel have more corrosion and breakage zones, so that the hole forming rate is low when the anchor cables are used for drilling holes in anchor cable construction.

Disclosure of Invention

In order to solve the problem of low hole forming rate when anchor cable construction drilling is carried out at a rock erosion broken zone, the application provides grouting liquid, a preparation method and application of the grouting liquid in the reinforcement treatment of the erosion broken zone.

In a first aspect, the present application provides a grouting liquid that adopts the following technical scheme:

the grouting liquid is prepared from the following raw materials in parts by weight:

60-90 parts of cement, 80-100 parts of sand, 28-36 parts of bentonite, 5-10 parts of wood powder, 80-150 parts of glass beads, 1.2-2 parts of composite foaming agent, 12-16 parts of suspending agent, 4-8 parts of dispersing agent and 460 parts of water as 600; wherein the composite foaming agent consists of an animal cement foaming agent and lauryl sodium sulfate, and the weight ratio of the glass beads to the wood powder is 1-3.

Preferably, the grouting liquid is prepared from the following raw materials in parts by weight: 60-90 parts of cement, 80-100 parts of sand, 28-36 parts of bentonite, 7-9 parts of wood powder, 100-120 parts of glass beads, 1.5-2 parts of composite foaming agent, 12-16 parts of suspending agent, 4-8 parts of dispersing agent and 460-600 parts of water; wherein the composite foaming agent consists of an animal cement foaming agent and lauryl sodium sulfate, and the weight ratio of the glass beads to the wood powder is 1.1-1.7.

By adopting the technical scheme, the wood powder increases the crack resistance of the hardened mortar, and reduces the number of cracks caused by drilling, thereby reducing the possibility of secondary rock mass falling caused by the expansion of tiny cracks in the follow-up process and increasing the effect of reinforcing the one-time corrosion fracture zone.

The glass beads can improve the grouting fluidity of the grout, and meanwhile, sand in departments is replaced, so that when the grout is injected into the same amount, the increased weight of a broken belt part after hardening is smaller, and the influence of extra weight increment caused by reinforcement on rock stress is reduced.

After the composite foaming agent is injected into the broken belt, the slurry expands in the hardening process, so that holes caused by shrinkage are avoided, the strength of the broken belt is improved, and the hole forming operation is facilitated.

The sodium dodecyl sulfate can clean impurities on the surface of the wood powder, so that the wood powder is combined with other adhesives more firmly, and the crack resistance of a broken zone is improved.

Preferably, the grouting liquid also comprises 2.5-5 parts of an early strength agent.

By adopting the technical scheme, the early strength agent can enable the slurry to be quickly hardened after being injected, so that the on-site subsequent drilling operation is facilitated, and the construction efficiency is improved.

Preferably, the grouting liquid also comprises 10-15 parts of hydroxymethyl cellulose.

By adopting the technical scheme, the hydroxymethyl cellulose enables the wood powder to be dispersed more uniformly, so that the components of the slurry at each position of the broken belt after grouting are more consistent, secondary cracks can not be generated due to different positions when the slurry is hardened and holes are formed, and the service life of the broken belt is prolonged.

Preferably, the particle size of the wood flour is 40-70 mesh.

By adopting the technical scheme, the wood flour has better fiber length, and the improvement effect on the aspect of crack resistance is increased.

In a second aspect, the present application provides a method for preparing a grouting liquid, which adopts the following technical scheme:

a method for preparing a grouting liquid comprises the following steps:

dissolving the suspending agent and the dispersing agent in water according to the weight ratio, uniformly mixing, adding the glass beads for soaking, and fully stirring to form a suspension;

adding the wood powder into the suspension, and uniformly stirring to form a mixed solution;

mixing and stirring cement, sand and bentonite uniformly to form a mixture;

and mixing the mixed solution with the mixture, adding the early strength agent, and uniformly stirring to obtain the grouting liquid.

By adopting the technical scheme, after the manufactured grouting liquid is injected into the broken zone, the strength and the crack resistance of the broken zone can be improved under the condition of smaller weight increment, and the subsequent hole forming operation is facilitated.

Preferably, the mixed solution is subjected to ultrasonic oscillation for 30-60min, and the ultrasonic oscillation frequency is 25KHz-28 KHz. More preferably, the selected mixed solution is subjected to ultrasonic oscillation for 45min, and the ultrasonic oscillation frequency is 27 KHz.

By adopting the technical scheme, the wood powder and the glass beads are fully and uniformly dispersed in the solution, and the agglomeration phenomenon is reduced. The lauryl sodium sulfate can wash the wood powder more fully, so that the wood powder and the binder are combined more firmly when the slurry is hardened and foamed, and the strength is improved.

In a third aspect, the application provides the application of the grouting in the corrosion-fractured zone reinforcing treatment.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the wood powder increases the crack resistance of the hardened mortar, and reduces the number of cracks caused by drilling, thereby reducing the possibility of secondary rock mass falling caused by the expansion of tiny cracks in the follow-up process, and increasing the effect of reinforcing the one-time corrosion and fracture zone. The glass beads can improve the grouting fluidity of the grout, and meanwhile, sand in departments is replaced, so that when the grout is injected into the same amount, the increased weight of a broken belt part after hardening is smaller, and the influence of extra weight increment caused by reinforcement on rock stress is reduced. Promote broken area reinforcing strength jointly, be favorable to the pore-forming.

Detailed Description

The embodiment of the application discloses grouting liquid, a preparation method and application of the grouting liquid in reinforcing treatment of an erosion fracture zone.

Examples

A method for preparing a grouting liquid comprises the following steps:

the suspending agent and the dispersing agent are dissolved in water according to the weight ratio and are uniformly mixed, the glass beads are added for soaking, and the suspension is formed after full stirring. The suspending agent is a commercially available nano silica sol, the dispersing agent is a commercially available sodium citrate, and the particle size of the glass beads is 40-70 meshes.

Adding wood powder into the suspension, stirring for 15-30min, adding foaming agent, stirring for 15-30min to form a mixed solution, and subjecting the mixed solution to ultrasonic oscillation for 30min at the ultrasonic oscillation frequency of 25 KHz. The fineness of the wood powder is 40-70 meshes, and the water content is 6% -8%. The foaming agent is a composite foaming agent formed by uniformly mixing an animal cement foaming agent and lauryl sodium sulfate.

Mixing and stirring cement, sand and bentonite uniformly to form a mixture;

and mixing and stirring the mixed solution after the ultrasonic oscillation and the mixed material for 45min, adding the early strength agent, and continuously stirring for 20s to obtain grouting liquid, wherein the early strength agent is commercially available calcium formate. The proportions of the respective raw materials are shown in Table 1 below.

Table 1 raw material proportioning table in each example

Example 9

A method of producing a slip casting slurry, which differs from that of example 7 in that 10g of hydroxymethyl cellulose is added to the wood flour before it is added to the suspension.

Example 10

A method of producing a slip casting, which differs from that of example 7 in that 12g of hydroxymethyl cellulose is added to the wood flour before it is added to the suspension.

Example 11

A method of producing a slip casting, which differs from that of example 7 in that 15g of hydroxymethyl cellulose is added to the wood flour before it is added to the suspension.

And (3) performance detection: the slurries prepared in examples 1 to 11 were examined for density, fluidity, initial setting time, final setting time, and hardening strength. The results of the performance measurements are shown in Table 2.

Comparative example 1

A method for preparing a slip casting slurry, which is different from that of example 2 in that glass beads are not contained in the raw materials and the amount of sand added is 180 g.

Comparative example 2

A method for producing a slip casting slurry, which is different from that of example 2, in that the amount of glass beads added to the starting material was 60 g.

Comparative example 3

A method for producing a slip casting, which is different from example 2 in that wood flour is not contained in the raw material.

Comparative example 4

A method for preparing a slip casting slurry, which is different from that of example 7 in that the raw material does not contain sodium dodecylsulfate.

Comparative example 5

A method for preparing a slip casting solution, which is different from that of example 7 in that wood flour and sodium dodecylsulfate are not contained in the raw materials.

Table 2 table of performance test data in each example

Grouting performance detection: and printing cuboid sand mold samples with uniform specification in batches by using a 3D printer, wherein the specification of the sand mold samples is 1000mm x 1000mm, and the sand mold samples are provided with micropores and cracks with consistent erosion broken band structures and anchor holes reserved with grouting. Measuring basis weight M of sand mold samples₀Drilling sampling to measure compressive strength F₀Recording the number of fractures Q around the borehole₀。

The grouting liquids of examples 1 to 11 were injected into the sand mold samples respectively, with a grouting pressure of 0.3MPa and a grouting speed of 60L/min. And stopping grouting when the grouting liquid overflows from the anchor hole, and recording the grouting time t at the moment. Measuring the weight M of the sand mold sample after the grouting liquid is hardened₁Drilling sampling to measure compressive strength F₁Recording the number of fractures Q around the borehole₁. The results are shown in Table 3.

Table 3 slip casting property test data table

According to the data of examples 1-3, when the weight ratio of the glass beads to the wood powder is reduced, the fluidity of the mortar is gradually reduced, and in combination with comparative examples 1 and 2, when the weight ratio of the glass beads to the wood powder is less than 10, the grouting performance of the slurry is obviously reduced, so that the grouting filling is uneven, and the mortar is easy to crack during drilling.

According to the data of examples 2, 4 and 5 and comparative example 4, it can be known that the addition of sodium dodecyl sulfate can change the foaming effect of wood flour to a certain extent, so that the bonding property of the wood flour in the system is better, and the crack resistance is improved.

According to the data of the embodiments 6 to 8, the glass beads can better improve the fluidity of the slurry, and are beneficial to filling of the slurry. Combining comparative example 4 and comparative example 5, it can be seen that sodium lauryl sulfate and wood flour together increase the crack resistance of the system.

From the data of examples 9-11, it is seen that the hydroxymethyl cellulose enables the wood flour to be more uniformly dispersed in the system, improving the overall crack resistance and strength, and improving the post-foaming stability of the slurry.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.