Fabricated coal retaining wall based on insurance mechanism and design method thereof

Abstract

The invention discloses an assembly type coal retaining wall based on an insurance mechanism and a design method of the assembly type coal retaining wall, relates to the technical field of coal retaining walls, and aims at solving the problems that in the prior art, the building procedure is complex, the construction period is long, the cost is high, and repairing is not easy after damage. The coal shed column is connected with a U-shaped buttress column through a strong connecting component and a weak connecting component, the U-shaped buttress column is of a two-section structure, one section of the U-shaped buttress column is strongly connected with the coal shed column, the other section of the U-shaped buttress column is weakly connected with the coal shed column, and a prestressed concrete hollow slab is inserted into the U-shaped buttress column. When the stress of the prestressed concrete hollow slab exceeds a critical state, a safety mechanism can be triggered, the prestressed concrete hollow slab is effectively separated from the coal shed column, the coal shed column is protected in a targeted mode, and structural potential safety hazards are reduced. The active pressure relief protection structure is simple in structure and more beneficial to field implementation. And after a safety mechanism is triggered, the coal retaining wall structure can be rapidly repaired conveniently through the standby anti-shearing bar grooves reserved in the coal shed columns. Assembly type assembly is adopted, the working procedure is simple, and the construction period is short.

Description

Technical Field

[0001] The invention relates to the technical field of coal retaining walls, and in particular to an assembled coal retaining wall based on a safety mechanism and a design method thereof. Background Art

[0002] Among the various coal storage methods in coal plants and power plants today, large-span coal storage sheds are widely used due to their large coal storage capacity, low cost, convenient construction, and environmental protection. The longitudinal support span of traditional coal retaining walls is generally greater than eight meters, and the lateral span is several dozen meters. The upper huge grid structure is supported on the coal shed column, and the top of the column is subject to a large lateral horizontal thrust from the grid. When the coal retaining wall is integrally connected to the coal shed column or is located near the inner side of the coal shed column in a separate connection, the coal retaining wall is subject to lateral soil pressure, coal pressure, vehicle and mechanical disturbance, earthquake, lateral wind and other loads and other unpredictable sudden factors. Under long-term action, it is easy to cause the top of the coal shed column to displace too much or cause sudden damage to the coal shed column, posing a great safety hazard to the overall structure of the coal storage shed. At present, most coal retaining walls are made of cast-in-place concrete, with complex on-site procedures, long construction period, large amount of steel bars and concrete, and high construction cost. When the top of the coal shed column is displaced too much or suddenly damaged, the deformation and damage are uncontrollable and not easy to repair quickly. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an assembled coal retaining wall based on a safety mechanism and a design method thereof, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention first discloses an assembled coal retaining wall based on a safety mechanism, and the technical solution adopted is that it includes a coal shed column, to which a prestressed concrete hollow slab is connected, and to which a U-shaped buttress column is connected, and the U-shaped buttress column includes a fixed part and a safety part, and the fixed part and the coal shed column are connected by a strong connecting member, and the safety part and the coal shed column are connected by a weak connecting member; the safety part is located above or on the upper part of the fixed part, and the safety part is connected to a group of the prestressed concrete hollow slabs, and another group of prestressed concrete hollow slabs is arranged below the group of the prestressed concrete hollow slabs, and the prestressed concrete hollow slabs located below are connected to the fixed part; the strength of the weak connecting member is lower than the strength of the prestressed concrete hollow slabs. When the lateral pressure on the prestressed concrete hollow slab installed in the insurance part is too great, the weak connection component breaks, triggering the insurance mechanism, and the prestressed concrete hollow slab installed in the insurance part falls off, releasing the pressure in time. This method makes the failure form of the coal retaining wall controllable, and when damage occurs, the prestressed concrete hollow slab can be reinstalled with a new weak connection component, which is convenient for quick repair.

[0005] As a preferred technical solution of the present invention, it also includes an H-shaped buttress column, which is located between two adjacent coal shed columns. The prestressed concrete hollow slab is connected between the U-shaped buttress column and the H-shaped buttress column. The H-shaped buttress column is used to connect the prestressed concrete hollow slab between two adjacent coal shed columns when the span is large, so as to prevent the span from being too large and the length of the prestressed concrete hollow slab from being too long, which may lead to excessive bending moment and the risk of damage to the prestressed concrete hollow slab.

[0006] As a preferred technical solution of the present invention, an independent foundation is connected below the H-shaped buttress column.

[0007] As a preferred technical solution of the present invention, the strong connection component is a connecting bolt, a sleeve is pre-embedded on the coal shed column, and the connecting bolt is connected to the sleeve. The strong connection can ensure a strong connection strength between the lower prestressed concrete hollow slab and the U-shaped buttress column.

[0008] As a preferred technical solution of the present invention, the weak connection member is a shear rod, and rod grooves are provided on the coal shed column and the U-shaped buttress column. The shear rod is inserted into the rod grooves of the coal shed column and the U-shaped buttress column. The insurance is triggered by the fracture of the shear rod, so that the damage to the coal retaining wall can be more controllable and easy to repair.

[0009] As a preferred technical solution of the present invention, the safety portion of the U-shaped buttress column is located above the fixing portion, the safety portion is an upper segment buttress column, and the upper segment buttress column and the fixing portion are both U-shaped structures.

[0010] As a preferred technical solution of the present invention, the fixing portion of the U-shaped buttress column includes a U-shaped portion and an L-shaped portion, the L-shaped portion is arranged above the U-shaped portion, and the safety portion is an outer baffle plate, which is connected to the L-shaped portion to form a U-shaped structure.

[0011] As a preferred technical solution of the present invention, a fireproof board is also connected to the prestressed concrete hollow slab to improve fire safety.

[0012] The present invention also discloses a design method of the assembled coal retaining wall based on the insurance mechanism, and the technical solution adopted is, comprising the following steps: Step 1: Calculate the maximum lateral pressure at the bottom of the coal retaining wall based on Rankine earth pressure theory : in, is the bulk density of coal, H is the maximum coal blocking height, is the active earth pressure coefficient; Step 2: Assume that the length of the prestressed concrete hollow slab constituting the coal retaining wall is , calculate the bending moment of the coal retaining wall and shear : in, is the partial factor of the variable load, is the maximum lateral pressure at the bottom of the coal retaining wall; The calculation model of the U-shaped buttress column is simplified to a cantilever column with a fixed bottom and a free top. The calculation of the U-shaped buttress column includes the lateral pressure transmitted by the side prestressed concrete hollow slab and the lateral pressure within its own range, and then the bottom bending moment of the U-shaped buttress column is calculated. and bottom shear : middle, is the partial factor of the variable load, is the active earth pressure resultant, H is the maximum coal retaining height; Step 3: According to the bottom shear force of the U-shaped buttress column Calculate the size and quantity of shear bars; Step 4: Determine the independent foundation area and perform overall stability verification; Step 5, determine the structural material of the U-shaped buttress column and the H-shaped buttress column and the preparation process of the independent foundation; Step 6: According to the maximum coal blocking height H The number of vertical blocks and thickness of the prestressed concrete hollow slab are determined by the width of a single prestressed concrete hollow slab.

[0013] As a preferred technical solution of the present invention, in step 5, the structural material of the U-shaped buttress column and the H-shaped buttress column is a steel structure or a concrete structure, and the preparation process of the independent foundation is prefabrication or cast-in-place.

[0014] Compared with the prior art, the invention has the following beneficial effects: the invention installs a U-shaped buttress column on the coal shed column, the U-shaped buttress column is divided into a fixed part and a safety part, a weak connection is adopted between the safety part and the coal shed column, and a strong connection is adopted between the fixed part and the coal shed column. When the force on the coal retaining wall formed by the prestressed concrete hollow slab exceeds the critical state, the safety mechanism is triggered, and the coal shed column is effectively separated, so as to protect the coal shed column in a targeted manner and reduce the potential safety hazards of the structure. The active pressure relief protection structure is simple in structure and more conducive to on-site implementation. And the spare shear rod groove reserved in the coal shed column is convenient for the rapid repair of the coal retaining wall structure after the safety mechanism is triggered. The invention realizes full assembly, shortens the construction period, reduces the amount of steel bars and concrete, reduces the cost, adopts the prestressed concrete hollow slab and the fireproof board to stick and anchor, avoids the conventional wet operation such as masonry refractory bricks, and has high-efficiency assembly construction. The overall structure has a clear force transmission path, the unit component form is conventional, the production cost is low, and the buttress column and the prestressed concrete hollow slab can be recycled and reused, which reduces the waste of resources.

[0015] Furthermore, the connection form of the components of the present invention is simple, the prestressed concrete hollow slab is laterally embedded in the buttress column slot, the U-shaped buttress column is embedded in the coal shed column, and the H-shaped buttress column adopts an independent foundation under the column, avoiding the traditional strip foundation and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the structure of the present invention; Figure 2 It is a front view of the structure of the present invention; Figure 3 This is an axonometric diagram of the structure of the present invention; Figure 4 This is a schematic diagram of the U-shaped buttress column structure of the first embodiment of the present invention; Figure 5 This is a schematic diagram of a U-shaped buttress column connection structure according to a first embodiment of the present invention; Figure 6 A top view of a U-shaped buttress column fixing portion connection structure according to a first embodiment of the present invention; Figure 7 A top view of the U-shaped buttress column safety part connection structure according to the first embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a U-shaped buttress column in a second embodiment of the present invention; Fig. 9 This is a schematic diagram of a U-shaped buttress column connection structure according to a second embodiment of the present invention; Fig.10 A top view of a U-shaped buttress column connection structure according to a second embodiment of the present invention; Fig.11 A top view of the H-shaped buttress column connection structure of the present invention; Fig.12This is a structural reference diagram for the present invention.

[0017] In the figure: 1. U-shaped buttress column; 2. H-shaped buttress column; 3. Independent foundation; 4. Shear rod; 5. Prestressed concrete hollow slab; 6. Coal shed column; 7. Upper segment buttress column; 8. Strong connection member; 9. Weak connection member; 10. Outer baffle; 11. Fireproof board. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1 to 7 As shown, this embodiment discloses the first implementation of the present invention. This embodiment first discloses an assembled coal retaining wall based on a safety mechanism. The technical solution adopted is that it includes a coal shed column 6. There is a base under the column of the coal shed column 6. There are ground piles on the bottom surface of the base, and the ground piles are below the ground. In this embodiment, the coal retaining wall is formed by a prestressed concrete hollow slab 5. In order to connect the prestressed concrete hollow slab 5, a U-shaped buttress column 1 is connected to the side of the column of the coal shed column 6. The prestressed concrete hollow slab 5 is inserted into the U-shaped buttress column 1. In order to prevent the span of the prestressed concrete hollow slab 5 between two adjacent coal shed columns 6 from being too large, resulting in a reduction in the strength of the prestressed concrete hollow slab 5, an H-shaped buttress column 2 is set between two adjacent coal shed columns 6, as shown in FIG. Fig.11 As shown, the column cross-section of the H-shaped buttress column 2 is H-shaped, and there are slots on both sides for connecting to the prestressed concrete hollow slabs 5. An independent foundation 3 is set on the bottom surface of the H-shaped buttress column 2, which makes the H-shaped buttress column 2 more stable and the force transmission path clearer.

[0020] In order to make the damage result controllable and easy to repair when the prestressed concrete hollow slab 5 is damaged by a large lateral force, a safety mechanism is set at the connection between the U-shaped buttress column 1 and the coal shed column 6. Specifically, the U-shaped buttress column 1 includes a fixed part and an upper segment buttress column 7 (i.e., the safety part) located above the fixed part, the fixed part is the lower segment buttress column, and the upper segment buttress column 7 and the lower segment buttress column are both U-shaped structures, such as Figure 6 , Figure 7As shown, the bottom surfaces of the U-shaped plug-in grooves of the lower segment buttress column and the upper segment buttress column 7 are provided with connection grooves that penetrate the contact surface with the coal shed column 6. Sleeves are pre-buried at positions corresponding to the connection grooves of the coal shed column 6 and the lower segment buttress column. The strong connection between the lower segment buttress column and the coal shed column 6 can be achieved by passing the connection bolts through the connection grooves and screwing them into the sleeves. The connection bolts and the sleeves constitute a strong connection component 8. The upper segment buttress column 7 and the coal shed column 6 are provided with rod grooves corresponding to the positions. The shear rods 4 are inserted into the rod grooves, so as to achieve a weak connection between the upper segment buttress column 7 and the coal shed column 6. The shear rods 4 are the weak connection components 9. A group of prestressed concrete hollow slabs 5 are inserted between the U-shaped grooves of the lower segment buttress column and the slots of the H-shaped buttress column 2, and another group of prestressed concrete hollow slabs 5 are inserted between the slots of the upper segment buttress column 7 and the H-shaped buttress column 2.

[0021] In order to meet the fire protection requirements, a fireproof board 11 is bonded and anchored on the side of the prestressed concrete hollow slab 5 that contacts the coal pile. In order to prevent the rod groove from being damaged when the weak connection member 9 is damaged, affecting the subsequent repair, spare rod grooves are set on the opposite surfaces of the U-shaped buttress column 1, the H-shaped buttress column 2 and the prestressed concrete hollow slab 5.

[0022] Working principle: When the lateral force on the prestressed concrete hollow slab 5 exceeds the critical value that the shear rod 4 can withstand, the shear rod 4 breaks, and the prestressed concrete hollow slab 5 and the upper segment buttress column 7 are separated from the U-shaped buttress column 1 and the H-shaped buttress column 2, and the coal pile is depressurized.

[0023] After eliminating the risks, insert the new shear rod 4 through the rod groove of the upper segment buttress column 7 into the rod grooves of the U-shaped buttress column 1 and the H-shaped buttress column 2, connect the upper segment buttress column 7 with the U-shaped buttress column 1 and the H-shaped buttress column 2, and insert the prestressed concrete hollow slab 5 into the slots of the U-shaped buttress column 1 and the H-shaped buttress column 2 to complete the repair of the coal retaining wall.

[0024] This embodiment also discloses a design method for the above-mentioned coal retaining wall, and the technical solution adopted is to include the following steps: Step 1, such as Fig.12 As shown in the figure, the maximum lateral pressure at the bottom of the coal retaining wall is calculated based on the Rankine earth pressure theory. : in, is the bulk density of coal (in this embodiment, the value is 10KN / m 3 ), H is the maximum coal blocking height (3.0m in this embodiment), is the active earth pressure coefficient (in this embodiment, the value is 0.8); during the calculation process, the internal friction angle with the coal Take 35 degrees; Step 2: Assume that the length of the prestressed concrete hollow slab 5 constituting the coal retaining wall is (4m in this embodiment), calculate the bending moment of the coal retaining wall and shear : in, is the partial factor of the variable load (in this embodiment, the value is 1.5), is the maximum lateral pressure at the bottom of the coal retaining wall (24KN / m calculated in step 1 of this embodiment) 2 ); The calculation model of the U-shaped buttress column 1 is simplified to a cantilever column with a fixed bottom and a free top. The calculation of the U-shaped buttress column 1 includes the lateral pressure transmitted by the side prestressed concrete hollow slab 5 and the lateral pressure within its own range, and then the bottom bending moment of the U-shaped buttress column 1 is calculated. and bottom shear (Because the prestressed concrete hollow slab 5 is inserted between the U-shaped buttress column 1 and the H-shaped buttress column 2, the lateral pressure borne by the U-shaped buttress column 1 is half of the lateral pressure transmitted by the prestressed concrete hollow slab 5): in, is the partial factor of the variable load (in this embodiment, the value is 1.5), is the active earth pressure force (in this embodiment, the value is 36KN), H is the maximum coal blocking height (3.0m in this embodiment); Step 3: Based on the bottom shear force of the U-shaped buttress column 1 Calculate the size and quantity of shear rod 4: When the cross section of the shear rod 4 is rectangular: in, is the design value of concrete tensile strength (in this embodiment, the value is 7.0N / mm 2 , using UHPC concrete), is the cross-sectional width of shear bar 4, is the cross-section height of shear bar 4; When the cross section of the shear rod 4 is circular: in, is the design value of concrete tensile strength (7.0N / mm 2 , using UHPC concrete), is the cross-sectional radius of shear bar 4; This embodiment uses a shear rod 4 with a circular cross section, and the cross-sectional radius thereof is 30 mm. After calculating the total cross-sectional area of ​​the shear rod 4, the number is calculated according to the actual cross-sectional area of ​​each shear rod 4; Step 4: Determine the independent foundation area through the force analysis of the buttress column, and perform the overall stability verification of anti-overturning and anti-slip; Step 5: According to the actual situation on site and project requirements, the structural material of the U-shaped buttress column 1 and the H-shaped buttress column 2 is steel structure, and the preparation process of the independent foundation 3 is cast-in-place; Step 6: According to the height of the top surface of the prestressed concrete hollow slab 5 from the bottom surface of the coal pile H Determine the number of vertical blocks of prestressed concrete hollow slab 5 n and thickness h : in, H is the maximum coal blocking height (3.0m in this embodiment), is the width of the prestressed concrete hollow slab 5 (1.2 m in this embodiment); Thickness of prestressed concrete hollow slab 5 h is a fixed modulus (0.16m in this embodiment); Step 7, set the first rod groove at the upper quarter of the midline of the side of the U-shaped buttress column 1 and the prestressed concrete hollow slab 5, set the second rod groove at 1.5 times the diameter below the first rod groove, set a spare rod groove at 3 times the diameter below the first rod groove, and pre-embed the sleeve on the coal shed column 6 at the position corresponding to the position of the first rod groove and the second rod groove.

[0025] After the design is completed, during assembly, the fireproof board 11 is glued and anchored on the side of the prestressed concrete hollow slab 5 that contacts the coal pile, and the floor below the prestressed concrete hollow slab 5 is compacted. One end of the prestressed concrete hollow slab 5 is placed above the independent foundation 3, and the other end is placed on the protruding ear of the coal shed column 6.

[0026] Example 2 like Figures 8 to 10 As shown, the difference between this embodiment and embodiment 1 is that the U-shaped buttress column 1 includes a fixing part and a safety part, wherein the lower part of the fixing part is a U-shaped structure, and the upper part is an L-shaped structure, the safety part is an outer baffle plate 10, and the outer baffle plate 10 is a square plate, which is connected to the end face of the L-shaped structure of the fixing part, and together with the L-shaped structure, forms a U-shaped structure, and the connecting groove of the fixing part is opened in the U-shaped groove of the U-shaped structure at the lower part of the fixing part and on the short side where the L-shaped structure and the coal shed column 6 are connected; the rod groove of the outer baffle plate 10 horizontally penetrates the outer baffle plate 10, and the rod groove is perpendicular to the connecting surface between the coal shed column 6 and the outer baffle plate 10.

[0027] Working principle: When the lateral force on the prestressed concrete hollow slab 5 exceeds the critical value that the shear rod 4 can withstand, the shear rod 4 breaks, and the prestressed concrete hollow slab 5 and the outer baffle 10 are separated from the U-shaped buttress column 1 and the H-shaped buttress column 2, and the coal pile is depressurized.

[0028] After eliminating the risks, insert the new shear rod 4 through the rod groove of the outer baffle plate 10 into the rod grooves of the U-shaped buttress column 1 and the H-shaped buttress column 2, connect the outer baffle plate 10 with the U-shaped buttress column 1 and the H-shaped buttress column 2, and insert the prestressed concrete hollow slab 5 into the slot surrounded by the U-shaped buttress column 1, the H-shaped buttress column 2 and the outer baffle plate 10 to complete the repair of the coal retaining wall.

[0029] The mechanical connection involved in the present invention is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of tests, which is common knowledge.

[0030] The components not described in detail in this article are existing technologies. In the design method, the method for determining the structural materials of the U-shaped buttress column 1 and the H-shaped buttress column 2, the method for determining the preparation process of the independent foundation 3, the method for determining the area of ​​the independent foundation 3, and the stability verification are all existing technologies in this field.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled coal retaining wall based on a safety mechanism, comprising a coal shed column (6), to which a prestressed concrete hollow slab (5) is connected, characterized in that: A U-shaped buttress column (1) is connected to the coal shed column (6), and the U-shaped buttress column (1) comprises a fixing portion and a safety portion, wherein the fixing portion and the coal shed column (6) are connected via a strong connection member (8), and the safety portion and the coal shed column (6) are connected via a weak connection member (9); the safety portion is located above or on the upper part of the fixing portion, and is connected to a group of prestressed concrete hollow slabs (5), and another group of prestressed concrete hollow slabs (5) is located below the group of prestressed concrete hollow slabs (5), and the prestressed concrete hollow slabs (5) located below are connected to the fixing portion.

2. The assembled coal retaining wall based on the insurance mechanism according to claim 1 is characterized in that: It also comprises an H-shaped buttress column (2), wherein the H-shaped buttress column (2) is located between two adjacent coal shed columns (6), and the prestressed concrete hollow slab (5) is connected between the U-shaped buttress column (1) and the H-shaped buttress column (2).

3. The assembled coal retaining wall based on the insurance mechanism according to claim 2 is characterized in that: An independent foundation (3) is connected below the H-shaped buttress column (2).

4. The assembled coal retaining wall based on the insurance mechanism according to any one of claims 1 to 3, characterized in that: The strong connection member (8) is a connection bolt, a sleeve is pre-buried on the coal shed column (6), and the connection bolt is connected in the sleeve.

5. The assembled coal retaining wall based on the insurance mechanism according to claim 4 is characterized in that: The weak connection member (9) is a shear rod (4), and rod grooves are provided on the coal shed column (6) and the U-shaped buttress column (1), and the shear rod (4) is inserted into the rod grooves of the coal shed column (6) and the U-shaped buttress column (1).

6. The assembled coal retaining wall based on the safety mechanism according to claim 1 is characterized in that: The securing portion of the U-shaped buttress column (1) is located above the fixing portion, the securing portion is an upper segment buttress column (7), and both the upper segment buttress column (7) and the fixing portion are U-shaped structures.

7. The assembled coal retaining wall based on the insurance mechanism according to claim 1 is characterized in that: The fixing portion of the U-shaped buttress column (1) comprises a U-shaped portion and an L-shaped portion, the L-shaped portion is arranged above the U-shaped portion, and the securing portion is an outer baffle plate (10), the outer baffle plate (10) being connected to the L-shaped portion to form a U-shaped structure.

8. The assembled coal retaining wall based on the safety mechanism according to claim 1 is characterized in that: The prestressed concrete hollow slab (5) is also connected to a fireproof board (11).

9. A design method for an assembled coal retaining wall based on a safety mechanism as claimed in claim 5, characterized in that: The following steps are involved: Step 1: Calculate the maximum lateral pressure at the bottom of the coal retaining wall based on Rankine earth pressure theory : ； in, is the bulk density of coal, H is the maximum coal blocking height, is the active earth pressure coefficient; Step 2: Assume that the length of the prestressed concrete hollow slab (5) constituting the coal retaining wall is , calculate the bending moment of the coal retaining wall and shear : ； ； in, is the partial factor of the variable load, is the maximum lateral pressure at the bottom of the coal retaining wall; The calculation model of the U-shaped buttress column (1) is simplified to a cantilever column with a fixed bottom and a free top. The calculation of the U-shaped buttress column (1) includes the lateral pressure transmitted from the side prestressed concrete hollow slab (5) and the lateral pressure within its own range, and then the bottom bending moment of the U-shaped buttress column (1) is calculated. and bottom shear : ； ； middle, is the partial factor of the variable load, is the active earth pressure resultant, H is the maximum coal retaining height; Step 3: Based on the bottom shear force of the U-shaped buttress column (1), Calculate the size and quantity of shear bars; Step 4: Determine the independent foundation area and perform overall stability verification; Step 5, determining the structural materials of the U-shaped buttress column (1) and the H-shaped buttress column (2) and the preparation process of the independent foundation (3); Step 6: According to the maximum coal blocking height H The number of vertical blocks and the thickness of the prestressed concrete hollow slab (5) are determined by the width of a single prestressed concrete hollow slab (5).

10. The design method of the assembled coal retaining wall based on the insurance mechanism according to claim 9 is characterized in that: In step 5, the structural material of the U-shaped buttress column (1) and the H-shaped buttress column (2) is a steel structure or a concrete structure, and the preparation process of the independent foundation (3) is prefabrication or cast-in-place.

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