阅读说明：本技术 一种高强固结体施工方法 (Construction method of high-strength concrete ) 是由 王海涛 马文贤 于曼丽 刘飞 李有春 南夸 牛旭东 拉浪多杰 李涛 陈浩明 苏伟 于 2021-09-09 设计创作，主要内容包括：本发明涉及隧道施工技术领域,具体涉及一种高强固结体施工方法。具体施工方法为：块石原材检验、块石筛分、冲洗、模板加固、块石构筑、胶凝材料浇筑及脱模养护。本发明高强固结体施工方法,施工过程安全可靠、施工效率高且对工程施工质量有保证。其中,胶凝材料掺和物SK粉改为S95级矿粉,可以降低胶凝材料成本、提高胶凝材料抗压强度、降低水化热,减少胶凝材料裂缝、增加胶凝材料密实度,节约了一定的费用。(The invention relates to the technical field of tunnel construction, in particular to a construction method of a high-strength concrete. The specific construction method comprises the following steps: the method comprises the steps of block stone raw material inspection, block stone screening, washing, template reinforcement, block stone construction, cementing material pouring and demolding maintenance. The construction method of the high-strength concretion body has the advantages of safe and reliable construction process, high construction efficiency and guaranteed engineering construction quality. The SK powder serving as the binding material admixture is changed into S95-grade mineral powder, so that the cost of the binding material can be reduced, the compressive strength of the binding material can be improved, the hydration heat can be reduced, the cracks of the binding material can be reduced, the compactness of the binding material can be increased, and certain cost can be saved.)

1. A construction method of a high-strength concrete is characterized by comprising the following specific steps:

step 1, checking a stone block raw material: the test items of the raw material of the block stone comprise the grain diameter, the mud content, the compressive strength, the apparent density and the firmness of the block stone; wherein the apparent density of the block stone is not less than 2500kg/m³The lowest uniaxial compressive strength is not less than 80MPa, the average compressive strength is not less than 100MPa, the particle size of the rock block is 20-70 cm, and the surface is washed clean;

step 2, screening the rock lumps: measuring the block stones on site, and performing primary classified stacking according to two grading ranges of 200-500 mm and 500-700 mm, so that subsequent block stone placement construction is facilitated; the cross section of the rock block is preferably trapezoidal or wedge-shaped, the middle part is full, and the longest side is not more than 3 times of the shortest side; the block stone is required to be hard in texture, free of cracks, mud-sandwiched weak layers, weathering and sharp-angled thin edges;

step 3, washing: flushing the rock block by using a water pump or a sprinkler on site, mainly washing off dirt such as stone chips, mud dirt or water rust on the surface, and achieving the purpose of wetting the surface of the rock block so as to be convenient for bonding with the cementing material;

step 4, reinforcing the template: the template consists of a shaped steel die, a template card, an arched channel steel beam, a pull rod and a high-strength bolt, wherein the arched channel steel beam is processed by channel steel and is fixedly connected with the connecting bolt of the three-dimensional corrugated steel plate through a screw rod and a connecting screw rod, one end of the screw rod is welded on the three-dimensional corrugated steel plate; the thickness of the cementing material structure can be conveniently controlled by adjusting nuts penetrating through the upper part and the lower part of the arched channel steel beam on the screw rod; the periphery of the shaping template is provided with fastening holes, the template is connected with each other through template clamps when the template is installed, the arched channel steel beam and the shaping steel mould are provided with limiting holes, and the arched channel steel beam and the shaping steel mould are connected and fixed through movable clamping pins; the spacing hole pitch and the aperture of the arched channel steel beam and the limiting hole of the shaped steel die are strictly consistent;

during reinforcement, the lower end of the arched channel steel beam is fixed on foundation angle steel, and when the pouring of the foundation cementing material is completed, embedded steel bars are embedded in the proper position of the foundation; then the angle steel is welded and fixed with the embedded steel bar; the distance between the arched channel steel beams is 1.5m, and can also be adjusted according to the size of a shaped steel die, the transverse distance between the pull rods welded with the three-dimensional corrugated steel plate is 2m, the longitudinal distance between the pull rods and the arched channel steel beams is 3m, and the pull rods are connected with the arched channel steel beams through high-strength bolts; the arched channel steel beam is required to be accurately positioned, checked for passing through lines, firm and reliable when being installed, the shaping steel die is installed on the inner side of the arched channel steel beam, the linearity of each layer of shaping steel die is required to be checked for passing through the lines in time after the shaping steel die is installed, and if deviation exists, the shaping steel die can be adjusted by using a wedge-shaped wood block;

step 5, building the block stone: manually stacking is adopted, the block stones are transported to a stacking place by using a tower crane, and the stacking is stable according to the principle that a big end faces downwards, a small end faces upwards, a big stone is erected, a middle stone is filled with a space, and a small stone is filled in a seam; putting the rock blocks into a warehouse according to the concreting sequence of the concreting bodies in a layering way, wherein the stacking height of each layer is not more than 1.2 m; before placing the block stones in the bin, hanging a protective layer control sideline at the upper opening of the template, controlling according to 10cm, and after stacking the block stones, enabling the protective layer to be not less than 5 cm;

step 6, pouring a cementing material: because the concretion body is stacked densely, the cementing material can not be vibrated after being put in a bin, and the pouring is required to be guaranteed to be dense, so that the requirement on the compressive strength is met; in order to ensure the construction quality of the consolidation body bullet-shielding layer, improve the fluidity of the cementing material, improve the compressive strength of the cementing material, reduce the hydration heat, reduce the cracks of the cementing material and increase the compactness of the cementing material, the cementing material containing S95-grade mineral powder is adopted for pouring, and the pouring height is 10cm lower than the surface of the rock block when the cementing material is poured;

step 7, demolding and maintaining: and (3) after the cementing material is poured for 12 hours, removing the side formwork, and then carrying out heat preservation and watering maintenance on the cementing material after the side formwork is removed.

2. The construction method of the high-strength concrete according to claim 1, wherein in the step 4, the length of the shaped steel die is 1.5m, the width of the shaped steel die is 0.5m, the embedded steel bars are phi 25, and the space and the row spacing of the embedded steel bars are both 1.5 m; the width of two sides of the angle steel welded and fixed with the embedded steel bars is 50cm, and the thickness is 5 mm.

3. The construction method of the high-strength concrete according to claim 1, wherein in the step 6, the cementing material is poured by a pumping method, and the extension degree test is respectively carried out before the mixing station is out of the station and before the cementing material is poured on the construction site after the mixing of the cementing material is finished.

4. The construction method of a high-strength concrete according to claim 1, wherein in the step 6, the cementing material is composed of the following raw materials in parts by weight: 15-30 parts of cement, 1-5 parts of fly ash, 0.5-4 parts of S95-grade mineral powder, 25-40 parts of fine aggregate, 10-16 parts of first coarse aggregate, 28-45 parts of second coarse aggregate, 0.1-1.2 parts of additive and 5-8 parts of water.

5. The method as claimed in claim 4, wherein the fine aggregate has a particle size of less than 3mm, the coarse aggregate has a particle size of 3 to 5mm, and the coarse aggregate has a particle size of 5 to 7 mm.

6. A method as claimed in claim 4, wherein the cement is grade 52.5.

Technical Field

The invention relates to the technical field of protection engineering, in particular to a construction method of a high-strength concrete.

Background

In the engineering construction process of the alpine region, the geology of the engineering is mainly a sand-gravel layer, the water level is between 1.6 and 2.0m, and the water lowering construction is needed because the foundation burial depth is below the groundwater level. In addition, the construction area is large, and excavation construction needs to be carried out simultaneously during construction. Therefore, the precipitation adopts large-area well point precipitation construction, in addition, the geology of the lower part of the construction area is mainly sandy gravel, and when the traditional percussion drilling is adopted for construction, hole collapse is easily caused, so that the construction progress is influenced.

In addition, in the construction process, a deep liquefaction layer appears when a part of the foundation of the construction area is excavated, so that the construction progress of the project is influenced; for a new project, the construction of a high-strength consolidation body in the structure is particularly important for the project construction, wherein the quality and stacking form of the rock blocks, the mixing proportion of the cementing materials and the pouring process are tested and controlled, and the construction of the consolidation body is ensured to meet the requirements of a protection project.

Disclosure of Invention

Based on the technical problems, the invention tests and controls the quality and stacking form of the rock blocks, the mixing proportion of the cementing materials and the pouring process by researching the construction method of the high-strength concretion body, and aims to provide the construction method of the high-strength concretion body.

The invention discloses a construction method of a high-strength concrete, which comprises the following specific steps:

step 1, checking a stone block raw material: the test items of the raw material of the block stone comprise the grain diameter, the mud content, the compressive strength, the apparent density and the firmness of the block stone; wherein the apparent density of the block stone is not less than 2500kg/m³The lowest uniaxial compressive strength is not less than 80MPa, the average compressive strength is not less than 100MPa, the particle size of the rock block is 20-70 cm, and the surface is washed clean;

step 2, screening the rock lumps: measuring the block stones on site, and performing primary classified stacking according to two grading ranges of 200-500 mm and 500-700 mm, so that subsequent block stone placement construction is facilitated; the cross section of the rock block is preferably trapezoidal or wedge-shaped, the middle part is full, and the longest side is not more than 3 times of the shortest side; the block stone is required to be hard in texture, free of cracks, mud-sandwiched weak layers, weathering and sharp-angled thin edges;

step 3, washing: flushing the rock block by using a water pump or a sprinkler on site, mainly washing off dirt such as stone chips, mud dirt or water rust on the surface, and achieving the purpose of wetting the surface of the rock block so as to be convenient for bonding with the cementing material;

step 4, reinforcing the template: the template consists of a shaped steel die, a template card, an arched channel steel beam, a pull rod and a high-strength bolt, wherein the arched channel steel beam is processed by channel steel and is fixedly connected with the connecting bolt of the three-dimensional corrugated steel plate through a screw rod and a connecting screw rod, one end of the screw rod is welded on the three-dimensional corrugated steel plate; the thickness of the cementing material structure can be conveniently controlled by adjusting nuts penetrating through the upper part and the lower part of the arched channel steel beam on the screw rod; the periphery of the shaping template is provided with fastening holes, the template is connected with each other through template clamps when the template is installed, the arched channel steel beam and the shaping steel mould are provided with limiting holes, and the arched channel steel beam and the shaping steel mould are connected and fixed through movable clamping pins; the spacing hole pitch and the aperture of the arched channel steel beam and the limiting hole of the shaped steel die are strictly consistent;

during reinforcement, the lower end of the arched channel steel beam is fixed on foundation angle steel, and when the pouring of the foundation cementing material is completed, embedded steel bars are embedded in the proper position of the foundation; then the angle steel is welded and fixed with the embedded steel bar; the distance between the arched channel steel beams is 1.5m, and can also be adjusted according to the size of a shaped steel die, the transverse distance between the pull rods welded with the three-dimensional corrugated steel plate is 2m, the longitudinal distance between the pull rods and the arched channel steel beams is 3m, and the pull rods are connected with the arched channel steel beams through high-strength bolts; the arched channel steel beam is required to be accurately positioned, checked for passing through lines, firm and reliable when being installed, the shaping steel die is installed on the inner side of the arched channel steel beam, the linearity of each layer of shaping steel die is required to be checked for passing through the lines in time after the shaping steel die is installed, and if deviation exists, the shaping steel die can be adjusted by using a wedge-shaped wood block;

step 5, building the block stone: manually stacking is adopted, the block stones are transported to a stacking place by using a tower crane, and the stacking is stable according to the principle that a big end faces downwards, a small end faces upwards, a big stone is erected, a middle stone is filled with a space, and a small stone is filled in a seam; putting the rock blocks into a warehouse according to the concreting sequence of the concreting bodies in a layering way, wherein the stacking height of each layer is not more than 1.2 m; before placing the block stones in the bin, hanging a protective layer control sideline at the upper opening of the template, controlling according to 10cm, and after stacking the block stones, enabling the protective layer to be not less than 5 cm;

step 6, pouring a cementing material: because the concretion body is stacked densely, the cementing material can not be vibrated after being put in a bin, and the pouring is required to be guaranteed to be dense, so that the requirement on the compressive strength is met; in order to ensure the construction quality of the consolidation body bullet-shielding layer, improve the fluidity of the cementing material, improve the compressive strength of the cementing material, reduce the hydration heat, reduce the cracks of the cementing material and increase the compactness of the cementing material, the cementing material containing S95-grade mineral powder is adopted for pouring, and the pouring height is 10cm lower than the surface of the rock block when the cementing material is poured;

step 7, demolding and maintaining: and (3) after the cementing material is poured for 12 hours, removing the side formwork, and then carrying out heat preservation and watering maintenance on the cementing material after the side formwork is removed.

Further, in the step 4, the length of the shaping steel die is 1.5m, the width of the shaping steel die is 0.5m, the diameter of the embedded steel bar is phi 25, and the space and the row spacing of the embedded steel bars are both 1.5 m; the width of two sides of the angle steel welded and fixed with the embedded steel bars is 50cm, and the thickness is 5 mm.

Further, in the step 6, the cementing material is poured in a pumping mode, and the extension degree test is respectively carried out before the mixing station is out of the station and before the construction site pouring is finished after the cementing material is mixed.

Further, in the step 6, the cementing material is composed of the following raw materials in parts by weight: 15-30 parts of cement, 1-5 parts of fly ash, 0.5-4 parts of S95-grade mineral powder, 25-40 parts of fine aggregate, 10-16 parts of first coarse aggregate, 28-45 parts of second coarse aggregate, 0.1-1.2 parts of additive and 5-8 parts of water.

Furthermore, the particle size of the fine aggregate is less than 3mm, the particle size of the first coarse aggregate is 3-5 mm, and the particle size of the second coarse aggregate is 5-7 mm.

Further, the cement is grade 52.5.

Compared with the prior art, the invention has the following beneficial effects:

the construction method of the high-strength concretion body has the advantages of safe and reliable construction process, high construction efficiency and guaranteed engineering construction quality. The SK powder serving as the binding material admixture is changed into S95-grade mineral powder, so that the cost of the binding material can be reduced, the compressive strength of the binding material can be improved, the hydration heat can be reduced, the cracks of the binding material can be reduced, the compactness of the binding material can be increased, and certain cost can be saved.

Drawings

FIG. 1 is a flow chart of the construction method of the present invention;

fig. 2 is a schematic view of the reinforcing structure of the template of the present invention.

In the figure, 1, shaping a steel die; 2. an arched channel beam; 4. a high-strength bolt; 5. and (5) template clamping.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The invention discloses a construction method of a high-strength concrete, which comprises the following specific steps:

step 1, checking a stone block raw material: the test items of the raw material of the block stone comprise the grain diameter, the mud content, the compressive strength, the apparent density and the firmness of the block stone; wherein the stone block isObtaining the apparent density of not less than 2500kg/m³The lowest uniaxial compressive strength is not less than 80MPa, the average compressive strength is not less than 100MPa, the particle size of the rock block is 20cm, and the surface is washed clean;

step 2, screening the rock lumps: measuring the block stones on site, and performing primary classified stacking according to two grading ranges of 200-500 mm and 500-700 mm, so that subsequent block stone placement construction is facilitated; the cross section of the rock block is preferably trapezoidal or wedge-shaped, the middle part is full, and the longest side is not more than 3 times of the shortest side; the block stone is required to be hard in texture, free of cracks, mud-sandwiched weak layers, weathering and sharp-angled thin edges;

step 3, washing: flushing the rock block by using a water pump or a sprinkler on site, mainly washing off dirt such as stone chips, mud dirt or water rust on the surface, and achieving the purpose of wetting the surface of the rock block so as to be convenient for bonding with the cementing material;

step 4, reinforcing the template: the template consists of a shaped steel die, a template card, an arched channel steel beam, a pull rod and a high-strength bolt, wherein the arched channel steel beam is processed by channel steel and is fixedly connected with the connecting bolt of the three-dimensional corrugated steel plate through a screw rod and a connecting screw rod, one end of the screw rod is welded on the three-dimensional corrugated steel plate; the thickness of the cementing material structure can be conveniently controlled by adjusting nuts penetrating through the upper part and the lower part of the arched channel steel beam on the screw rod; the periphery of the shaping template is provided with fastening holes, the template is connected with each other through template clamps when the template is installed, the arched channel steel beam and the shaping steel mould are provided with limiting holes, and the arched channel steel beam and the shaping steel mould are connected and fixed through movable clamping pins; the spacing hole pitch and the aperture of the arched channel steel beam and the limiting hole of the shaped steel die are strictly consistent;

during reinforcement, the lower end of the arched channel steel beam is fixed on foundation angle steel, and when the pouring of the foundation cementing material is completed, embedded steel bars are embedded in the proper position of the foundation; then the angle steel is welded and fixed with the embedded steel bar; the distance between the arched channel steel beams is 1.5m, and can also be adjusted according to the size of a shaped steel die, the transverse distance between the pull rods welded with the three-dimensional corrugated steel plate is 2m, the longitudinal distance between the pull rods and the arched channel steel beams is 3m, and the pull rods are connected with the arched channel steel beams through high-strength bolts; the arched channel steel beam is required to be accurately positioned, checked for passing through lines, firm and reliable when being installed, the shaping steel die is installed on the inner side of the arched channel steel beam, the linearity of each layer of shaping steel die is required to be checked for passing through the lines in time after the shaping steel die is installed, and if deviation exists, the shaping steel die can be adjusted by using a wedge-shaped wood block;

step 5, building the block stone: manually stacking is adopted, the block stones are transported to a stacking place by using a tower crane, and the stacking is stable according to the principle that a big end faces downwards, a small end faces upwards, a big stone is erected, a middle stone is filled with a space, and a small stone is filled in a seam; putting the rock blocks into a warehouse according to the concreting sequence of the concreting bodies in a layering way, wherein the stacking height of each layer is not more than 1.2 m; before placing the block stones in the bin, hanging a protective layer control sideline at the upper opening of the template, controlling according to 10cm, and after stacking the block stones, enabling the protective layer to be not less than 5 cm;

step 6, pouring a cementing material: because the concretion body is stacked densely, the cementing material can not be vibrated after being put in a bin, and the pouring is required to be guaranteed to be dense, so that the requirement on the compressive strength is met; in order to ensure the construction quality of the consolidation body bullet-shielding layer, improve the fluidity of the cementing material, improve the compressive strength of the cementing material, reduce the hydration heat, reduce the cracks of the cementing material and increase the compactness of the cementing material, the cementing material containing S95-grade mineral powder is adopted for pouring, and the pouring height is 10cm lower than the surface of the rock block when the cementing material is poured;

step 7, demolding and maintaining: and (3) after the cementing material is poured for 12 hours, removing the side formwork, and then carrying out heat preservation and watering maintenance on the cementing material after the side formwork is removed.

Optimally, in the step 4, the length of the shaping steel die is 1.5m, the width of the shaping steel die is 0.5m, the diameter of the embedded steel bar is phi 25, and the space and the row spacing of the embedded steel bars are both 1.5 m; the width of two sides of the angle steel welded and fixed with the embedded steel bars is 50cm, and the thickness is 5 mm.

Preferably, in the step 6, the cementing material is poured in a pumping mode, and the extension degree test is respectively carried out before the mixing station is out of the station and before the construction site pouring is finished after the cementing material is mixed.

Preferably, in the step 6, the cementing material is composed of the following raw materials in parts by weight: 15 parts of cement, 1 part of fly ash, 0.5 part of S95-grade mineral powder, 25 parts of fine aggregate, 10 parts of first coarse aggregate, 28 parts of second coarse aggregate, 0.1 part of additive and 5 parts of water.

Optimally, the particle size of the fine aggregate is less than 3mm, the particle size of the first coarse aggregate is 3mm, and the particle size of the second coarse aggregate is 5 mm.

Further, the cement is grade 52.5.

Example 2

The invention discloses a construction method of a high-strength concrete, which comprises the following specific steps:

step 1, checking a stone block raw material: the test items of the raw material of the block stone comprise the grain diameter, the mud content, the compressive strength, the apparent density and the firmness of the block stone; wherein the apparent density of the block stone is not less than 2500kg/m³The lowest uniaxial compressive strength is not less than 80MPa, the average compressive strength is not less than 100MPa, the grain size of the rock block is 70cm, and the surface is washed clean;

step 2, screening the rock lumps: measuring the block stones on site, and performing primary classified stacking according to two grading ranges of 200-500 mm and 500-700 mm, so that subsequent block stone placement construction is facilitated; the cross section of the rock block is preferably trapezoidal or wedge-shaped, the middle part is full, and the longest side is not more than 3 times of the shortest side; the block stone is required to be hard in texture, free of cracks, mud-sandwiched weak layers, weathering and sharp-angled thin edges;

step 3, washing: flushing the rock block by using a water pump or a sprinkler on site, mainly washing off dirt such as stone chips, mud dirt or water rust on the surface, and achieving the purpose of wetting the surface of the rock block so as to be convenient for bonding with the cementing material;

step 4, reinforcing the template: the template consists of a shaped steel die, a template card, an arched channel steel beam, a pull rod and a high-strength bolt, wherein the arched channel steel beam is processed by channel steel and is fixedly connected with the connecting bolt of the three-dimensional corrugated steel plate through a screw rod and a connecting screw rod, one end of the screw rod is welded on the three-dimensional corrugated steel plate; the thickness of the cementing material structure can be conveniently controlled by adjusting nuts penetrating through the upper part and the lower part of the arched channel steel beam on the screw rod; the periphery of the shaping template is provided with fastening holes, the template is connected with each other through template clamps when the template is installed, the arched channel steel beam and the shaping steel mould are provided with limiting holes, and the arched channel steel beam and the shaping steel mould are connected and fixed through movable clamping pins; the spacing hole pitch and the aperture of the arched channel steel beam and the limiting hole of the shaped steel die are strictly consistent;

during reinforcement, the lower end of the arched channel steel beam is fixed on foundation angle steel, and when the pouring of the foundation cementing material is completed, embedded steel bars are embedded in the proper position of the foundation; then the angle steel is welded and fixed with the embedded steel bar; the distance between the arched channel steel beams is 1.5m, and can also be adjusted according to the size of a shaped steel die, the transverse distance between the pull rods welded with the three-dimensional corrugated steel plate is 2m, the longitudinal distance between the pull rods and the arched channel steel beams is 3m, and the pull rods are connected with the arched channel steel beams through high-strength bolts; the arched channel steel beam is required to be accurately positioned, checked for passing through lines, firm and reliable when being installed, the shaping steel die is installed on the inner side of the arched channel steel beam, the linearity of each layer of shaping steel die is required to be checked for passing through the lines in time after the shaping steel die is installed, and if deviation exists, the shaping steel die can be adjusted by using a wedge-shaped wood block;

step 5, building the block stone: manually stacking is adopted, the block stones are transported to a stacking place by using a tower crane, and the stacking is stable according to the principle that a big end faces downwards, a small end faces upwards, a big stone is erected, a middle stone is filled with a space, and a small stone is filled in a seam; putting the rock blocks into a warehouse according to the concreting sequence of the concreting bodies in a layering way, wherein the stacking height of each layer is not more than 1.2 m; before placing the block stones in the bin, hanging a protective layer control sideline at the upper opening of the template, controlling according to 10cm, and after stacking the block stones, enabling the protective layer to be not less than 5 cm;

step 6, pouring a cementing material: because the concretion body is stacked densely, the cementing material can not be vibrated after being put in a bin, and the pouring is required to be guaranteed to be dense, so that the requirement on the compressive strength is met; in order to ensure the construction quality of the consolidation body bullet-shielding layer, improve the fluidity of the cementing material, improve the compressive strength of the cementing material, reduce the hydration heat, reduce the cracks of the cementing material and increase the compactness of the cementing material, the consolidation body cementing material containing S95-grade mineral powder is adopted for pouring, and the pouring height is 10cm lower than the surface of the rock block when the cementing material is poured;

step 7, demolding and maintaining: and (3) after the cementing material is poured for 12 hours, removing the side formwork, and then carrying out heat preservation and watering maintenance on the cementing material after the side formwork is removed.

Further, in the step 4, the length of the shaping steel die is 1.5m, the width of the shaping steel die is 0.5m, the diameter of the embedded steel bar is phi 25, and the space and the row spacing of the embedded steel bars are both 1.5 m; the width of two sides of the angle steel welded and fixed with the embedded steel bars is 50cm, and the thickness is 5 mm.

Preferably, in the step 6, the cementing material is poured in a pumping mode, and the extension degree test is respectively carried out before the mixing station is out of the station and before the construction site pouring is finished after the cementing material is mixed.

Preferably, in the step 6, the solidification body cementing material is composed of the following raw materials in parts by weight: 30 parts of cement, 5 parts of fly ash, 4 parts of S95-grade mineral powder, 40 parts of fine aggregate, 16 parts of first coarse aggregate, 45 parts of second coarse aggregate, 1.2 parts of additive and 8 parts of water.

Optimally, the particle size of the fine aggregate is less than 3mm, the particle size of the first coarse aggregate is 5mm, and the particle size of the second coarse aggregate is 7 mm.

Further, the cement is grade 52.5.

Example 3

In the method, the SK powder serving as the binding material admixture is changed into S95-grade mineral powder, so that the cost of the binding material can be reduced, the compressive strength of the binding material can be improved, the hydration heat can be reduced, the cracks of the binding material can be reduced, the compactness of the binding material can be increased, and certain cost can be saved. The specific comparison is as follows:

the cementing material is compared by adopting a basic mixing ratio and an adjusted mixing ratio in the construction of the consolidation body bullet-shielding layer, and the following comparison is carried out on the two methods:

TABLE 1 raw base mix ratio of the gelled materials

TABLE 2 optimized basic mix ratio of cementitious materials

Through measurement and calculation, the original basic mix proportion unit price is 858 yuan/m³The optimized mixing ratio comprehensive unit price is 760 yuan/m³The mixing ratio after adjustment is saved by 98 yuan for each party.

According to the engineering quantity of the consolidation body bullet-shielding layer of the design drawing, 84.28 ten thousand yuan is saved by the optimized method.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.