Flow solidified soil bag type filling construction method

Abstract

The invention relates to a flowing solidified soil bag type filling construction method which specifically comprises the steps that a soil sample and a curing agent are mixed according to a preset proportion and then mixed with water, and flowing solidified soil is obtained; a bag is manufactured, the bag is bound on the constructed support to form a bag layer, and the bag layer is placed at the filling position; pumping equipment is adopted to fill flowing solidified soil into the bags, and filling of all the bags in the first bag layer is completed; a second bag layer is built on the first bag layer; then, all the bags in the second bag layer are filled; the operation is repeated until the filling work of the bags in all the bag layers is completed; and a high-pressure grouting pump is adopted to inject flowing solidified soil into gaps between the bags, so that filling operation is completed. According to the flowing solidified soil bag type filling construction method, the construction condition that the filling operation space is limited can be overcome, the construction efficiency and quality are improved, and meanwhile the influence on the environment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering filling construction, and more particularly to a flow-solidified soil bag type filling construction method. BACKGROUND

[0002] In civil engineering construction, filling operation is one of the common construction links. The traditional filling method mostly adopts mechanical compaction method to compact backfill soil. This method has many shortcomings, specifically: first, the mechanical compaction method will cause a huge noise in the construction process, thereby greatly affecting the surrounding environment; second, the compaction effect of the soil layer by the mechanical compaction method is affected by many factors, such as the water content of the soil layer and the soil quality, which is easy to cause uneven compaction, thereby affecting the quality and stability of the entire project; in addition, in some cases, the backfill operation space is limited, and the backfill soil cannot be fully rammed by the machine, so it is difficult to meet the requirement of compactness, and the backfill quality is difficult to guarantee; finally, the mechanical compaction method has relatively low construction efficiency, and it is difficult to meet the rapid construction demand of large-scale projects. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a flow-solidified soil bag type filling construction method, which can overcome the construction condition of limited filling operation space, improve the efficiency and quality of construction, and reduce the adverse effects on the environment.

[0004] The technical solution of the present application to solve the above technical problems is:

[0005] A flow-solidified soil bag type filling construction method, comprising the following steps:

[0006] Step 1: mixing soil samples and curing agents according to a predetermined ratio to obtain a mixture, and then mixing the mixture with water according to a set water-cement ratio to obtain flow-solidified soil;

[0007] Step 2: making a bag according to the engineering requirements, then binding the bag on the erected support to form a bag layer, and placing the support together with the bag layer on the filling position;

[0008] Step 3: filling the flow-solidified soil prepared in step 1 into the bag in the bag layer erected in step 2 by using a pumping device, and completing the filling of all bags in the first bag layer;

[0009] Step 4: repeating step 2 to erect a second bag layer on the first bag layer, connecting the support with the second bag layer to the support with the first bag layer; then repeating step 3 to fill all bags in the second bag layer;

[0010] Step 5: Repeat Step 4 until the filling work of all the bags in all the bag layers is completed;

[0011] Step 6: Fill the space between the bags with flowable solidified soil by using a high-pressure grouting pump to complete the filling work.

[0012] Preferably, in Step 1, the solidifying agent is selected to be a ternary solidifying agent containing mineral powder, desulfurized gypsum and carbide slag, the mass ratio of the mineral powder: desulfurized gypsum: carbide slag in the ternary solidifying agent being 0.8:0.15:0.05; the soil sample and the solidifying agent are mixed by using a forced mixer, and the obtained mixture is mixed according to a water-cement ratio of 0.55-1.20 to obtain the flowable solidified soil.

[0013] Preferably, in Step 2, the bag is made of high-strength geotextile with a tensile strength greater than 20 kN / m and a water permeability coefficient less than 1x10 - 2 cm / s, the bag is a square bag, and the length x width of the square bag is 1.0 m x 1.0 m to 2.5 m x 2.5 m.

[0014] Preferably, in Step 2, the support includes vertical steel pipes and horizontal frames arranged on the vertical steel pipes, wherein the horizontal frames include transverse steel pipes and longitudinal steel pipes; the vertical steel pipes, transverse steel pipes and longitudinal steel pipes are in multiple groups; the multiple groups of transverse steel pipes are arranged longitudinally; the multiple groups of longitudinal steel pipes are arranged transversely; the vertical steel pipes are arranged at the intersections between the transverse steel pipes and the longitudinal steel pipes, respectively; and the transverse steel pipes, longitudinal steel pipes and vertical steel pipes are connected by connecting structures.

[0015] Preferably, in Step 2, the bags in the bag layer are arranged in sequence along the length direction of the transverse steel pipes, and the four corners of the bag are tied to the adjacent two transverse steel pipes by tying structures, and are located within the frame formed by the two groups of transverse steel pipes and the two groups of longitudinal steel pipes.

[0016] Preferably, in Step 3, the pressure of the pumping device is controlled to be between 0.5 MPa and 1.0 MPa, and the transportation rate is controlled to be between 0.5 m 3 / min and 1.0 m 3 / min.

[0017] Preferably, in Step 4, the vertical steel pipes in the support on which the next layer of bag is installed are spliced with the vertical steel pipes in the support on which the previous layer of bag is installed by building pipe connectors.

[0018] Preferably, in step 6, the grouting pressure of the high-pressure grouting pump should be controlled between 0.8MPa to 1.2MPa, and the grouting flow should be controlled between 0.3m 3 / min to 0.5m 3 / min.

[0019] Preferably, in step 2, after placing the support together with the bag layer on the support at the filling position, the support is reinforced by the reinforcing structure arranged on the slope, wherein the installation steps of the reinforcing structure are as follows:

[0020] Drilling installation holes on the slope, inserting anchor rods into the installation holes, and fixing them with anchoring agents, so that one end of the anchor rod is inserted into the installation hole, and the other end is bent and connected with the transverse steel pipe in each layer of horizontal frame.

[0021] Preferably, after obtaining the flow solidified soil, the flow degree and compressive strength of the flow solidified soil need to be tested, and the test standard is that the flow degree is greater than or equal to 180mm, and the compressive strength after 3 days of curing is greater than or equal to 1.5Mpa; after placing the support together with the bag layer on the support at the filling position, a laser level or a level is needed to be used to ensure that the flatness error of the bag should be less than 5mm; after connecting the anchor rod with the transverse steel pipe in each layer of horizontal frame, a pull-out test device is needed to be used to test the fixing effect of the anchor rod to ensure that the pull-out force of the anchor rod should be greater than 50kN.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. The flow solidified soil bag type filling construction method of the present application uses flow solidified soil instead of traditional backfill soil, and by using the flowability of flow solidified soil, compaction is not needed, which can significantly improve the construction efficiency and shorten the construction period.

[0024] 2. The flow solidified soil bag type filling construction method of the present application has small noise and little influence on the surrounding environment during construction, which meets the environmental protection requirements.

[0025] 3. The flow solidified soil bag type filling construction method of the present application fills the bags on the support to form the basic structure skeleton, and then fills the gaps between the bags to improve the compactness, thereby enhancing the overall stability of the structure and preventing local deformation or collapse; wherein the bag provides a constraint space for the flow solidified soil, which can reduce the waste of flow solidified soil in disordered flow, thereby improving the material utilization rate and reducing the filling cost.

[0026] 4. The flow solidified soil bag type filling construction method of the present application adopts staged filling, i.e. filling from the lowest bag layer upwards, which facilitates construction operation and quality control, and the construction process is clearer and more efficient, and the construction period is shorter.

[0027] 5、The flow-solidified soil bag type filling construction method of the present application installs the bag first and then fills the bag, compared with the method of filling with the filled bag, the unfilled bag has small volume and light weight, can better cope with complex terrain, has stronger construction flexibility, lower construction cost and safer construction process.

[0028] 6、The support and anchor rod reinforcement technology are combined in the flow-solidified soil bag type filling construction method of the present application, the use of anchor rod can further enhance the strength of backfill soil, thereby improving the engineering stability.

[0029] 7、The flow-solidified soil bag type filling construction method of the present application is suitable for various soil and geological conditions, especially suitable for filling engineering under high water content soil layer and complex geological conditions. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a cross-sectional view of the filling structure formed by the flow-solidified soil bag type filling construction method of the present application.

[0031] Figure 2 is a top view of the filling structure formed by the flow-solidified soil bag type filling construction method of the present application.

[0032] Figure 3 and Figure 4 are structural schematic views of two different perspectives of the bag layer.

[0033] Figure 5 is a large-scale view of the connection mode between the anchor rod and the steel pipe.

[0034] Figure 6 is a flowchart of the flow-solidified soil bag type filling construction method of the present application.

[0035] In the figure: 1-anchor rod; 2-horizontal frame of transverse steel pipe and longitudinal steel pipe; 3-bag; 4-flow-solidified soil; 5-vertical steel pipe; 6-welding seam of anchor rod and transverse steel pipe. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in combination with examples and drawings, but the embodiments of the present application are not limited thereto.

[0037] Example 1

[0038] Referring to Figures 1-6The filling structure formed by the flow-solidified soil bag filling construction method comprises a support and a bag layer arranged on the support, wherein the bag layer is multi-layered, and the multi-layered bag layer is arranged along the height direction of the support; each bag layer comprises bags 3 arranged along the length direction and the width direction of the support in sequence, the bags 3 are installed on the support, and the bags 3 are filled with flow-solidified soil 4; the gap between adjacent two bags 3 is filled with flow-solidified soil 4.

[0039] Referring to Figures 1-6 The support comprises vertical steel pipes 5 and multiple groups of horizontal frames 2 arranged on the vertical steel pipes 5, wherein the vertical steel pipes 5 are multiple groups; the multiple groups of horizontal frames 2 are arranged along the extension direction of the vertical steel pipes 5; each group of horizontal frames 2 comprises a transverse steel pipe and a longitudinal steel pipe, wherein the transverse steel pipe and the longitudinal steel pipe are multiple groups; the multiple groups of transverse steel pipes are arranged longitudinally; the multiple groups of longitudinal steel pipes are arranged transversely; and the multiple groups of vertical steel pipes 5 can be arranged at the joint between each group of transverse steel pipes and each group of longitudinal steel pipes respectively; the transverse steel pipe, the longitudinal steel pipe and the vertical steel pipe 5 are connected through a connecting structure;

[0040] In the embodiment, the four corners of the square bag are bound and fixed on the adjacent two transverse steel pipes by using a binding structure (such as a metal wire or a special binding belt); the transverse steel pipe is provided with a connecting hole for the longitudinal steel pipe to pass through, and the joint between the transverse steel pipe and the longitudinal steel pipe is welded to form a stable horizontal frame 2, thereby completing the construction of the bag layer; meanwhile, the vertical steel pipe 5 passes through the vertical opening of the transverse steel pipe or the longitudinal steel pipe, and is fixed on the transverse steel pipe or the longitudinal steel pipe by welding, thereby completing the construction of the support; then, the support and the bag layer arranged on the support are placed at the predetermined filling position by using a crane or a hoist, and the placement position and the angle of the bag 3 are accurately controlled to prevent the bag 3 from being inclined or wrinkled during the placement.

[0041] In addition, in order to realize the splicing and lengthening of the steel pipes (such as the vertical steel pipe 5, the transverse steel pipe and the longitudinal steel pipe), a building pipe connector can be used to splice the transverse steel pipe and the transverse steel pipe, the longitudinal steel pipe and the longitudinal steel pipe, and the vertical steel pipe 5 and the vertical steel pipe 5 to lengthen the length of the steel pipe; in the embodiment, the building pipe connector can be implemented by using an existing device.

[0042] Referring to Figures 1-6 The bag 3 has a tensile strength greater than 20 kN / m and a water permeability coefficient less than 1×10 -2The capsule bag 3 is made of high-strength geotextile with a strength of 20 cm, the capsule bag 3 is a square capsule bag with a length x width of 1.0 m x 1.0 m to 2.5 m x 2.5 m, and the four corners of the square capsule bag are bound on the transverse steel pipe or the longitudinal steel pipe by using a binding structure (such as a metal wire or a special binding belt); in this embodiment, the four corners of the square capsule bag are bound and fixed on the adjacent two transverse steel pipes by using a metal wire or a special binding belt, and the capsule bag 3 is located in the frame formed by the adjacent two transverse steel pipes and the two longitudinal steel pipes.

[0043] Referring to Figures 1-6 The filling structure formed by the flow-cured soil capsule bag filling construction method of the present application further comprises a reinforcing structure for reinforcing the support, the reinforcing structure comprises an anchor rod 1 arranged on the slope, the anchor rod 1 is arranged in a mounting hole arranged on the slope, one end of the anchor rod 1 is inserted into the mounting hole and is fixed by an anchoring agent; the other end is bent and connected with the transverse steel pipe in each layer of horizontal frame 2; by arranging the above-mentioned reinforcing structure, the support can be reinforced, thereby improving the stability thereof;

[0044] In addition, in addition to being connected with the transverse steel pipe in each layer of horizontal frame 2, the anchor rod 1 can also be connected with the longitudinal steel pipe and the vertical steel pipe 5, so that the stability of the support can be further improved;

[0045] In this embodiment, the bending angle of the anchor rod 1 is 30 degrees to 45 degrees, and the length of the bent section is greater than or equal to 100 mm, and the length of the anchor rod 1 can be adjusted according to the specific engineering requirements, and the diameter can be set to 25 mm to 30 mm.

[0046] Referring to Figures 1-6 The diameter of the transverse steel pipe, the longitudinal steel pipe and the vertical steel pipe 5 can be set to 50 mm to 80 mm; and the transverse steel pipe, the longitudinal steel pipe and the vertical steel pipe 5 are fixedly connected with the anchor rod 1 by welding.

[0047] Referring to Figures 1-6 The flow-cured soil capsule bag filling construction method of the present application comprises the following steps:

[0048] Step 1: mix the soil sample and the curing agent according to a predetermined ratio to obtain a mixture, and then mix the mixture with water according to a set water-cement ratio to obtain the flow-cured soil 4;

[0049] Step 2: according to the engineering requirements, the capsule bag 3 is made, then the capsule bag 3 is bound on the built support to form a capsule bag layer, and the support together with the capsule bag layer on the support is placed at the filling position;

[0050] Step 3: Fill the flow solidified soil 4 prepared in step 1 into the bag 3 in the bag layer built in step 2 by using a pumping device, and complete the filling of all bags 3 in the first bag layer;

[0051] Step 4: Repeat step 2 to build a second bag layer on the first bag layer, connect the support installed with the second bag layer with the support installed with the first bag layer, and then repeat step 3 to fill all bags 3 in the second bag layer;

[0052] Step 5: Repeat step 4 until the filling of all bags 3 in all bag layers is completed.

[0053] Step 6: Fill the flow solidified soil 4 into the gap between the bags 3 by using a high-pressure grouting pump to complete the filling work.

[0054] In summary, the flow solidified soil bag filling construction method of the present application solves the problems of uneven compaction, low construction efficiency and large environmental impact in traditional filling construction, and has the characteristics of high efficiency, environmental protection and strong stability. By accurately controlling the proportioning and construction process of the flow solidified soil 4, the density and strength of the filling structure are ensured, especially in complex geological conditions and high requirement projects.

[0055] Example 2

[0056] The following is a specific implementation case of the flow solidified soil bag filling construction method of the present application:

[0057] Referring to Figures 1-6 The flow solidified soil bag filling construction method in the present embodiment comprises the following steps:

[0058] Step 1: Mix the soil sample and the curing agent according to the predetermined ratio to obtain a mixture, and then mix the mixture with water according to the set water-cement ratio to make the final mixture have good fluidity, so as to obtain the flow solidified soil 4, and ensure that the fluidity of the prepared flow solidified soil 4 in the construction process and the strength after solidification meet the requirements; wherein the type and mixing ratio of the curing agent can be adjusted according to the soil quality and water content of the actual project, and the water-cement ratio is controlled between 0.55 and 1.20;

[0059] In the embodiment, the curing agent is selected from the group consisting of mineral powder, desulfurized gypsum and carbide slag, and the flowable cured soil 4 prepared by using the ternary curing agent has better strength and curing effect, wherein the mass ratio of the mineral powder, the desulfurized gypsum and the carbide slag in the curing agent is 0.8:0.15:0.05; the incorporation ratio of the curing agent and the water-cement ratio can be determined according to the specific soil sample, for example, for the granite residual soil with a water content of 19.8%, the incorporation ratio of the curing agent can be 15% and the water-cement ratio can be 1.0; for the clay with a water content of 20%, the incorporation ratio of the curing agent can be 20% and the water-cement ratio can be 1.0; by the above-mentioned ratio, the flowability and strength of the flowable cured soil 4 prepared are better, the flow value can reach 180 mm, and the compressive strength after 3 days of curing can reach 1.5 MPa;

[0060] In the preparation process, the soil sample and the curing agent are mixed by using a forced mixer, wherein the stirring time of the forced mixer is not less than 3 minutes to ensure the uniformity of the mixture;

[0061] In addition, after obtaining the flowable cured soil 4, the flowability and compressive strength of the flowable cured soil 4 need to be tested, and the test standards are that the flowability is greater than or equal to 180 mm and the compressive strength after 3 days of curing is greater than or equal to 1.5 MPa.

[0062] Step 2: Selecting a suitable geotextile material, customizing the size and shape of the bag 3 according to engineering requirements, for example, a square bag with a size of 1.5 m x 1.5 m can be customized; then preparing a horizontal steel pipe with a diameter of 50 mm, the length of the horizontal steel pipe can be flexibly adjusted according to the spacing of the bag 3; at the same time, using a high-strength binding structure, for example, using a metal wire or a special binding belt to bind and fix the four corners of the square bag on the adjacent two horizontal steel pipes; the horizontal steel pipe is provided with a connecting hole for the longitudinal steel pipe to pass through, and the horizontal steel pipe and the longitudinal steel pipe are welded at the connecting position to form a stable horizontal frame 2 structure, thereby completing the construction of the bag layer; at the same time, the vertical steel pipe 5 is passed through the vertical opening of the horizontal steel pipe or the longitudinal steel pipe, and the vertical steel pipe 5 is fixed on the horizontal steel pipe or the longitudinal steel pipe by welding, thereby completing the construction of the support; then using a crane or a hoist to place the support and the bag layer arranged on the support at the predetermined filling position, and accurately controlling the placement position and angle of the bag 3 to prevent the bag 3 from being inclined or wrinkled during the placement process;

[0063] In addition, after placing the support together with the bag layer on the support at the filling position, a mechanical auxiliary device is used to ensure that the bag 3 is flat and stable, specifically: a laser level or a level is used to ensure that the flatness error of the bag 3 should be less than 5 mm;

[0064] In the embodiment, the material of the bag 3 is selected as high-strength geotextile, which has good water permeability and tensile strength. The tensile strength of the high-strength geotextile should be greater than 20 kN / m, and the water permeability coefficient should be less than 1 x 10 -2 cm / ; in addition, the size of the bag 3 is selected as 1.5 m x 1.5 m, and the shape is square or rectangular.

[0065] Step 3: The flow solidified soil 4 prepared in step 1 is filled into the bag 3 in the bag layer built in step 2 by using a pumping device, and the filling of all bags 3 in the first bag layer is completed.

[0066] In the embodiment, the filling of the flow solidified soil 4 uses an intelligent pumping device, which is pre-set with parameters such as the ratio of the curing agent, the pressure value, the transportation rate, and one-key start-stop. The pressure of the pumping device should be controlled between 0.5 MPa and 1.0 MPa, and the transportation rate should be controlled between 0.5 m 3 / min and 1.0 m 3 / min.

[0067] Step 4: Repeat step 2 to build a second bag layer on the first bag layer, connect the support installed with the second bag layer with the support installed with the first bag layer, and then repeat step 3 to fill all bags 3 in the second bag layer.

[0068] In the embodiment, the filling construction is finally built up by multiple bag layers, wherein after the filling of the first bag layer is completed, the construction of the second bag layer is continued above the first bag layer, i.e. the process of binding and fixing the bag 3 in step 2 is repeated. The vertical steel pipes 5 in the support installed with the next layer (for example, the second layer) are connected with the vertical steel pipes 5 in the support installed with the previous layer (for example, the first layer) through the building pipe connector to realize the integrity between the bag layers. The building steel pipe connector includes a connecting pipe, a connecting assembly and a strip-shaped through slot, which can be implemented by using the existing building steel pipe connector to ensure the firmness and sealing of the vertical steel pipe 5.

[0069] In addition, the building steel pipe connector can also be used for lengthening the horizontal / vertical steel pipe, i.e. the two horizontal / vertical steel pipes are spliced through the building steel pipe connector to lengthen the length of the horizontal / vertical steel pipe.

[0070] Step 5: Repeat step 4 until the filling of all bags 3 in all bag layers is completed.

[0071] Step 6: The flow solidified soil 4 is injected into the gap between the bags 3 by using a high-pressure grouting pump to ensure that the flow solidified soil 4 is evenly filled, so as to improve the density and stability of the overall structure, thereby completing the filling work.

[0072] In this embodiment, in order to ensure that the flow solidified soil 4 can be evenly filled into the gap between the bags 3, the grouting pressure of the high-pressure grouting pump should be controlled between 0.8MPa to 1.2MPa, and the grouting flow should be controlled between 0.3m 3 / min to 0.5m 3 / min; the method of layer grouting from bottom to top is adopted, and the grouting hole is arranged at the edge or corner of the bag 3 to facilitate the diffusion of the flow solidified soil 4, so as to ensure that the flow solidified soil 4 can be evenly filled into all gaps between the bags 3, so as to improve the density and stability of the overall structure of the backfill soil.

[0073] Referring to Figures 1-6 , after the support and the bag layer on the support are placed at the filling position, the support is reinforced by the reinforcing structure arranged on the slope, and the installation process of the reinforcing structure is as follows:

[0074] A mounting hole with a diameter of 30mm is drilled on the slope, and the depth is adjusted according to the length of the anchor rod 1, for example, the hole depth can be 2.5m; the anchor rod 1 with a diameter of 25mm is inserted into the mounting hole and fixed with an anchoring agent, so that one end of the anchor rod 1 is inserted into the mounting hole, and the other end is bent at a certain angle and connected with the transverse steel pipe in each layer of horizontal frame 2, wherein the bending angle of the anchor rod 1 is between 30° to 45°, and the length of the bent section is greater than or equal to 100mm; the height of the weld 6 is greater than or equal to 6mm, and the tensile strength of the connection structure between the anchor rod 1 and the transverse steel pipe should be between 375MPa to 540MPa, so as to ensure the stability and reliability of the connection.

[0075] In this embodiment, the anchor rod spacing and arrangement can be adjusted according to the specific circumstances of the actual project to ensure the stability of the overall filling structure, for example: in the vertical direction, the transverse steel pipe in each layer of horizontal frame 2 is welded with one end of the anchor rod 1, and the other end of the anchor rod 1 is fixed into the slope (as shown in Figure 3 ); in the horizontal direction, an anchor rod 1 can be arranged every several transverse steel pipes (as shown in Figure 4 ).

[0076] In addition, the anchoring agent used for the installation of the anchor rod 1 is cement slurry, and the ratio of the cement slurry should be accurately adjusted according to the actual engineering requirements, and the water-cement ratio of the cement slurry is selected as 0.4 to ensure the structural stability of the anchor rod 1.

[0077] In addition, after connecting the anchor rod 1 with the transverse steel pipe in each layer horizontal frame 2, a pulling test device is needed to perform a pulling test on the fixing effect of the anchor rod 1 to ensure that the pulling resistance of the anchor rod 1 should be greater than 50kN.

[0078] The above is the preferred embodiment of the present application, but the embodiments of the present application are not limited to the above, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application should be equivalent replacement methods and are included in the protection scope of the present application.

Claims

1. A flowable solidified soil bag filling construction method, characterized in that: The following steps are involved: Step 1: Mix the soil sample and the curing agent in a predetermined ratio to obtain a mixture, and then mix the mixture with water according to a set water-cement ratio to obtain a flowable solidified soil; Step 2: Make a pouch according to the project requirements, then tie the pouch to the built bracket to form a pouch layer, and place the bracket together with the pouch layer on the bracket at the filling position; Step 3: Use a pumping device to fill the fluidized solidified soil prepared in step 1 into the bags in the bag layer built in step 2, completing the filling of all bags in the first bag layer; Step 4: Repeat step 2 to build a second pouch layer on the first pouch layer, and connect the stent with the second pouch layer to the stent with the first pouch layer; then repeat step 3 to fill all the pouches in the second pouch layer. Step 5: Repeat step 4 until all the pouches in all pouch layers are filled. Step 6: Use a high-pressure grouting pump to inject the fluidized solidified soil into the gaps between the bags to complete the filling operation.

2. The flowable solidified soil bag filling construction method according to claim 1 is characterized in that: In step 1, the curing agent is a ternary curing agent containing mineral powder, desulfurization gypsum and carbide slag, and the mass ratio of mineral powder: desulfurization gypsum: carbide slag in the ternary curing agent is 0.8:0.15:0.05; a forced mixer is used to mix the soil sample and the curing agent, and the obtained mixture is mixed according to a water-cement ratio of 0.55-1.20 to obtain flowable solidified soil.

3. The flowable solidified soil bag filling construction method according to claim 1 is characterized in that: In step 2, the pouch is made of a material with a tensile strength greater than 20 kN / m and a water permeability coefficient less than 1×10 -2 The bag is made of high-strength geotextile with a capacity of 1.5 cm / s. The bag is a square bag with a length×width of 1.0 m×1.0 m to 2.5 m×2.5 m.

4. The flowable solidified soil bag filling construction method according to claim 3 is characterized in that: In step 2, the bracket includes a vertical steel pipe and a horizontal frame arranged on the vertical steel pipe, wherein the horizontal frame includes a transverse steel pipe and a longitudinal steel pipe; the vertical steel pipe, transverse steel pipe, and longitudinal steel pipe are all in multiple groups; multiple groups of transverse steel pipes are arranged longitudinally; multiple groups of longitudinal steel pipes are arranged transversely; the vertical steel pipes are respectively arranged at the intersection between the transverse steel pipe and the longitudinal steel pipe; the transverse steel pipe, longitudinal steel pipe, and vertical steel pipe are connected by a connecting structure.

5. The flowable solidified soil bag filling construction method according to claim 4 is characterized in that: In step 2, the bags in the bag layer are arranged in sequence along the length direction of the transverse steel pipe, and the four corners of the bags are respectively tied to two adjacent transverse steel pipes through a tying structure, and are located in a frame formed by two groups of transverse steel pipes and two groups of longitudinal steel pipes.

6. The flowable solidified soil bag filling construction method according to claim 1 is characterized in that: In step 3, the pressure of the pumping equipment should be controlled between 0.5MPa and 1.0MPa, and the transport rate should be controlled at 0.5m 3 / min to 1.0m 3 / min.

7. The flowable solidified soil bag filling construction method according to claim 4 is characterized in that: In step 4, the vertical steel pipes in the bracket installed with the next layer of bladder layer and the vertical steel pipes in the bracket installed with the previous layer of bladder layer are spliced ​​through building pipe connectors.

8. The flowable solidified soil bag filling construction method according to claim 1 is characterized in that: In step 6, the grouting pressure of the high-pressure grouting pump should be controlled between 0.8MPa and 1.2MPa, and the grouting flow rate should be controlled at 0.3m 3 / min to 0.5m 3 / min.

9. The flowable solidified soil bag filling construction method according to claim 1, characterized in that: In step 2, after the stent and the bag layer on the stent are placed at the filling position, the stent is reinforced by a reinforcement structure arranged on the slope, wherein the reinforcement structure is installed in the following steps: Drill mounting holes on the slope, insert anchor rods into the mounting holes, and fix them with anchoring agents so that one end of the anchor rod is inserted into the mounting hole and the other end is bent and connected to the transverse steel pipe in each horizontal frame.

10. The flowable solidified soil bag filling construction method according to claim 9, characterized in that: After obtaining the fluidized solidified soil, the fluidity and compressive strength of the fluidized solidified soil need to be tested. The test standards are that the fluidity is greater than or equal to 180mm, and the compressive strength after 3 days of solidification is greater than or equal to 1.5Mpa; after placing the bracket together with the bag layer on the bracket at the fill position, a laser level or level is needed to ensure that the flatness error of the bag should be less than 5mm; after connecting the anchor rod to the transverse steel pipe in each horizontal frame, a pull-out test equipment is needed to conduct a pull-out test on the fixing effect of the anchor rod to ensure that the pull-out force of the anchor rod should be greater than 50kN.

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