A composite material used in tunnel structure sinking

Abstract

The present invention belongs to the field of tunnel materials, and in particular, relates to a composite material for use in tunnel structure sinking. To address the problems of poor water repellency, reinforcement, and solidification speed of existing composite materials, the following solution is proposed. The composite material comprises the following raw materials in parts by weight: 30-50 parts of cement, 10-15 parts of water, 20-30 parts of river sand, 1-5 parts of a water reducer, 5-10 parts of nano-silica, 5-10 parts of a water repellent, 5-10 parts of a reinforcing agent, and 5-10 parts of a rapid setting agent. The present invention improves the water repellency by adding the water repellent, improves the curing strength by using the reinforcing agent, and improves the setting speed by using the rapid setting agent.

Description

Technical Field

[0001] The present invention relates to the field of tunnel materials, in particular to a composite material used in tunnel structure sinking. Background Art

[0002] Tunnels are often built in soft soil, surrounded by dense underground pipelines and complex geological conditions. Furthermore, the narrow, busy roads above, the densely populated buildings, and the ongoing urban development along subway lines inevitably cause longitudinal settlement of subway tunnel structures. Once settlement exceeds specified limits, especially when it is uneven, it can cause deformation of the subway tunnel structure, posing a threat to normal operation and impacting the surrounding environment. When tunnel structures sink, composite materials are often used for filling and repair.

[0003] In the existing technology, the composite materials have poor water repellency, reinforcement and solidification speed effects. Therefore, we propose a composite material for use in tunnel structure sinking to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of composite materials in the prior art, such as poor water repellency, reinforcement and solidification speed, and to propose a composite material for use in tunnel structure sinking.

[0005] The present invention proposes a composite material for use in tunnel structure sinking, comprising the following raw materials in parts by weight: 30-50 parts of cement, 10-15 parts of water, 20-30 parts of river sand, 1-5 parts of a water reducer, 5-10 parts of nano-silicon dioxide, 5-10 parts of a water repellent, 5-10 parts of a reinforcing agent, and 5-10 parts of a rapid setting agent.

[0006] Preferably, the hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and organosilicon.

[0007] Preferably, the reinforcing agent includes acrylic emulsion and quartz sand.

[0008] Preferably, the rapid solidifying agent includes sodium nitrate, sodium metaaluminate, and silica powder.

[0009] Preferably, the raw materials include the following parts by weight: 32-48 parts of cement, 11-14 parts of water, 22-28 parts of river sand, 2-4 parts of water reducer, 6-9 parts of nano-silicon dioxide, 6-9 parts of water repellent, 6-9 parts of reinforcing agent, and 6-9 parts of rapid setting agent.

[0010] Preferably, the raw materials include the following parts by weight: 40 parts of cement, 12 parts of water, 25 parts of river sand, 3 parts of water reducer, 7 parts of nano-silicon dioxide, 7 parts of water repellent, 7 parts of reinforcing agent, and 7 parts of rapid setting agent.

[0011] Preferably, the preparation method comprises the following steps:

[0012] S1. Cement, water and river sand are stirred and mixed to prepare a base material;

[0013] S2, adding a water reducing agent and nano-silicon dioxide to the base material, stirring and mixing evenly to obtain a mixture;

[0014] S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly, and prepare a composite material used in tunnel structure sinking.

[0015] Preferably, in S1, cement, water and river sand are stirred and mixed by a mixer for 20-30 minutes to obtain a base material.

[0016] Preferably, in S2, a water reducing agent and nano-silicon dioxide are added to the base material and stirred and mixed uniformly for 15-20 minutes to obtain a mixture.

[0017] Preferably, in S3, a water repellent, a reinforcing agent and a rapid setting agent are added to the mixture, and the mixture is stirred and mixed uniformly for 30-35 minutes to obtain a composite material used in tunnel structure sinking.

[0018] The beneficial effects of the present invention are:

[0019] Acrylic emulsion has good fluidity, permeability and viscosity. On the one hand, it can evenly disperse other active ingredients into the concrete to play a role; on the other hand, it plays a bonding role on the wear surface, preventing cement material particles from falling off the surface.

[0020] Nitrates can promote the reaction of cement and speed up the setting of concrete. Adding chemicals such as sodium nitrate and potassium nitrate to concrete can increase the nitrate content in the concrete, thereby accelerating the setting of concrete.

[0021] The present invention can improve the water repellency by adding the water repellent, can improve the curing strength by using the reinforcing agent, and can increase the curing speed by using the rapid setting agent. DETAILED DESCRIPTION

[0022] The present invention will be further explained below with reference to specific embodiments.

[0023] Example 1

[0024] The present invention proposes a composite material for use in tunnel structure sinking, comprising the following raw materials in parts by weight: 30 parts of cement, 10 parts of water, 20 parts of river sand, 1 part of a water reducer, 5 parts of nano-silicon dioxide, 5 parts of a water repellent, 5 parts of a reinforcing agent, and 5 parts of a rapid setting agent;

[0025] The preparation method comprises the following steps:

[0026] S1. Cement, water and river sand were stirred and mixed for 20 min to obtain a base material;

[0027] S2. Add water reducing agent and nano-silicon dioxide to the base material and stir to mix evenly for 15 minutes to obtain a mixture;

[0028] S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly for 30 minutes to obtain a composite material used in tunnel structure sinking.

[0029] In this embodiment, the hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and silicone, the reinforcing agent includes acrylic emulsion and quartz sand, and the rapid setting agent includes sodium nitrate, sodium metaaluminate, and silica powder.

[0030] Example 2

[0031] A composite material used in tunnel structure sinking, comprising the following raw materials in parts by weight: 35 parts of cement, 11 parts of water, 22 parts of river sand, 2 parts of a water reducing agent, 6 parts of nano-silicon dioxide, 6 parts of a water repellent, 6 parts of a reinforcing agent, and 6 parts of a rapid setting agent;

[0032] The preparation method comprises the following steps:

[0033] S1. Cement, water and river sand were stirred and mixed for 22 min to obtain a base material;

[0034] S2. Add water reducing agent and nano-silica to the base material and stir to mix evenly for 16 minutes to obtain a mixture;

[0035] S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly for 31 minutes to obtain a composite material used in tunnel structure sinking.

[0036] In this embodiment, the hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and silicone, the reinforcing agent includes acrylic emulsion and quartz sand, and the rapid setting agent includes sodium nitrate, sodium metaaluminate, and silica powder.

[0037] Example 3

[0038] A composite material used in tunnel structure sinking, comprising the following raw materials in parts by weight: 40 parts of cement, 12 parts of water, 25 parts of river sand, 3 parts of water reducing agent, 7 parts of nano-silicon dioxide, 7 parts of water repellent, 7 parts of reinforcing agent, and 7 parts of rapid setting agent;

[0039] The preparation method comprises the following steps:

[0040] S1. Cement, water and river sand were stirred and mixed for 25 min to obtain a base material;

[0041] S2. Add water reducing agent and nano-silicon dioxide to the base material and stir to mix evenly for 17 minutes to obtain a mixture;

[0042] S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly for 32 minutes to obtain a composite material used in tunnel structure sinking.

[0043] In this embodiment, the hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and silicone, the reinforcing agent includes acrylic emulsion and quartz sand, and the rapid setting agent includes sodium nitrate, sodium metaaluminate, and silica powder.

[0044] Example 4

[0045] A composite material used in tunnel structure sinking, comprising the following raw materials in parts by weight: 45 parts of cement, 14 parts of water, 28 parts of river sand, 4 parts of water reducing agent, 9 parts of nano-silicon dioxide, 9 parts of water repellent, 9 parts of reinforcing agent, and 9 parts of rapid setting agent;

[0046] The preparation method comprises the following steps:

[0047] S1. Cement, water and river sand were stirred and mixed for 28 min to obtain a base material;

[0048] S2. Add water reducing agent and nano-silicon dioxide to the base material and stir to mix evenly for 19 minutes to obtain a mixture;

[0049] S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly for 34 minutes to obtain a composite material used in tunnel structure sinking.

[0050] In this embodiment, the hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and silicone, the reinforcing agent includes acrylic emulsion and quartz sand, and the rapid setting agent includes sodium nitrate, sodium metaaluminate, and silica powder.

[0051] Example 5

[0052] A composite material used in tunnel structure sinking, comprising the following raw materials in parts by weight: 50 parts of cement, 15 parts of water, 30 parts of river sand, 5 parts of water reducing agent, 10 parts of nano-silicon dioxide, 10 parts of water repellent, 10 parts of reinforcing agent, and 10 parts of rapid setting agent;

[0053] The preparation method comprises the following steps:

[0054] S1. Cement, water and river sand were stirred and mixed for 30 min to prepare a base material;

[0055] S2. Add water reducing agent and nano-silicon dioxide to the base material and stir to mix evenly for 20 minutes to obtain a mixture;

[0056] S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly for 35 minutes to obtain a composite material used in tunnel structure sinking.

[0057] In this embodiment, the hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and silicone, the reinforcing agent includes acrylic emulsion and quartz sand, and the rapid setting agent includes sodium nitrate, sodium metaaluminate, and silica powder.

[0058] The experimental data of the composite materials used in tunnel structure sinking prepared in Examples 1 to 5 are compared with conventional composite materials as shown in the following table:

[0059]

[0060]

[0061] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A composite material used in tunnel structure sinking, characterized in that: The raw materials include the following parts by weight: 30-50 parts of cement, 10-15 parts of water, 20-30 parts of river sand, 1-5 parts of water reducer, 5-10 parts of nano-silicon dioxide, 5-10 parts of water repellent, 5-10 parts of reinforcing agent, and 5-10 parts of rapid setting agent; The hydrophobic agent includes one or more of ammonium zirconium carbonate, polysiloxane powder, isobutyltriethoxysilane, and organosilicon; The reinforcing agent includes acrylic emulsion and quartz sand; The rapid solidifying agent includes sodium nitrate, sodium metaaluminate and silica powder.

2. The composite material for use in tunnel structure sinking according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 32-48 parts of cement, 11-14 parts of water, 22-28 parts of river sand, 2-4 parts of water reducing agent, 6-9 parts of nano silicon dioxide, 6-9 parts of water repellent, 6-9 parts of reinforcing agent and 6-9 parts of rapid setting agent.

3. The composite material for use in tunnel structure sinking according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 40 parts of cement, 12 parts of water, 25 parts of river sand, 3 parts of water reducing agent, 7 parts of nano silicon dioxide, 7 parts of water repellent, 7 parts of reinforcing agent and 7 parts of rapid setting agent.

4. The composite material for use in tunnel structure sinking according to claim 1, characterized in that: The preparation method comprises the following steps: S1. Cement, water and river sand are stirred and mixed to prepare a base material; S2, adding a water reducing agent and nano-silicon dioxide to the base material, stirring and mixing evenly to obtain a mixture; S3. Add a water repellent, a reinforcing agent and a rapid setting agent to the mixture, stir and mix evenly, and prepare a composite material used in tunnel structure sinking.

5. The composite material used in tunnel structure sinking according to claim 4, characterized in that: In S1, cement, water and river sand are stirred and mixed by a mixer for 20-30 minutes to obtain a base material.

6. The composite material for use in tunnel structure sinking according to claim 4, characterized in that: In S2, a water reducing agent and nano-silicon dioxide are added to the base material and stirred to mix uniformly for 15-20 minutes to obtain a mixture.

7. The composite material for use in tunnel structure sinking according to claim 4, characterized in that: In S3, a water repellent, a reinforcing agent and a rapid setting agent are added to the mixture, and the mixture is stirred and mixed uniformly for 30-35 minutes to obtain a composite material used in tunnel structure sinking.

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