A method for reconstructing an old thick-soil wall sunlight greenhouse

Abstract

The application relates to a reconstruction method of an old thick-soil-wall sunlight greenhouse, which comprises the following steps: removing all components except the enclosure wall; leveling the upper end surface of the north wall, arranging a support wall on the inner side of the north wall, and arranging a north wall ring beam protruding from the upper end surface of the north wall on the support wall; renovating or reconstructing the gable wall; arranging a front bottom foot ring beam higher than the ground at the front bottom foot; erecting a roof structure, which comprises a front roof and a rear roof, the lower end of the framework of the front roof is arranged on the front bottom foot ring beam, the lower end of the framework of the rear roof is arranged on the north wall ring beam, a column support structure for support is arranged below the roof structure, and the east-west direction of the roof structure is connected with the gable wall; filling a slope structure on the upper end surface of the north wall, and forming a guide slope with the rear roof. An economic and practical thick-soil-wall sunlight greenhouse reconstruction method which can balance the safety stability, heat preservation and storage property and mechanized operation of the greenhouse is provided.

Description

Technical Field

[0001] This invention relates to the field of greenhouse engineering technology, specifically a method for renovating old, thick-walled solar greenhouses. Background Technology

[0002] Thick-walled earthen greenhouses are favored by farmers for their excellent heat preservation and low construction cost, making a significant contribution to my country's facility vegetable production over the past 30 years and still accounting for the largest proportion of greenhouses. However, with increasing years of use, the collapse of thick-walled earthen greenhouses due to rainwater intrusion, snowstorms, and windstorms is becoming increasingly common. The greenhouse spans are increasing, but the amount of material used in the frame is insufficient, and the roof angles for light transmission do not meet standards, resulting in poor overall stability and thermal performance. Furthermore, with rising labor costs and the continuous development of agricultural machinery for greenhouse construction, old thick-walled earthen greenhouses with bamboo-wood hybrid structures and numerous columns can no longer meet the requirements of modern development.

[0003] Therefore, taking into full account the renovation costs, how to balance the safety and stability, heat preservation and storage, and mechanized operation of thick earthen wall solar greenhouses has become the main problem that urgently needs to be solved in the current renovation process of thick earthen wall solar greenhouses. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an economical and practical method for modifying thick earthen wall solar greenhouses that can take into account the safety and stability of the greenhouse, heat preservation and heat storage, and mechanized operation.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A method for renovating an old, thick-walled greenhouse includes the following steps:

[0007] Step 1: Remove all structural components except for the enclosing walls;

[0008] Step 2: Smooth the upper surface of the north wall and install a supporting wall on the inner side of the north wall. The supporting wall has a north wall ring beam that protrudes from the upper surface of the north wall.

[0009] Step 3: Repair or renovate the gable wall;

[0010] Step 4: Install a front abutment ring beam that is raised above the ground at the front abutment.

[0011] Step 5: Construct the roof structure, which includes a front roof and a rear roof. The lower end of the frame of the front roof is set on the front base ring beam, and the lower end of the frame of the rear roof is set on the north wall ring beam. A column support structure is set below the roof structure for support. Both the east and west sides of the roof structure are connected to the gable wall.

[0012] Step 6: Fill and install a slope structure on the upper surface of the north wall, and the slope structure and the rear roof form a guide slope.

[0013] In a preferred embodiment, the supporting wall includes several brick columns embedded in the inner side of the north wall and a north wall brick masonry wall set on the several brick columns. The north wall ring beam is set on the north wall brick masonry wall. The several brick columns are set at equal intervals. Several reinforcing bars are inserted in the brick columns and the north wall brick masonry wall. Several embedded parts are set in the north wall ring beam. The north wall ring beam is connected to the lower end of the frame of the rear roof through the embedded parts.

[0014] As a preferred embodiment, the method of repairing the gable wall in step three includes: compacting and leveling the upper part of the original gable wall, and then building a gable wall brick wall on the upper part of the original gable wall, wherein the shape and size of the top of the gable wall brick wall are adapted to the shape and size of the two sides of the roof structure.

[0015] As a preferred embodiment, the method of modifying the gable wall in step three includes: demolishing the original gable wall, and then building an east-west gable wall and a north-south gable wall at the original gable wall location;

[0016] The north-south gable wall includes a first gable wall strip foundation set in the north-south direction, a first gable wall ring beam set on the first gable wall strip foundation, and a number of first gable wall columns set at intervals on the first gable wall ring beam. The top of the first gable wall columns is connected to both sides of the roof structure, and a number of north-south gable wall longitudinal connections are provided on the number of first gable wall columns.

[0017] The east-west gable wall includes an east-west oriented second gable wall strip foundation, a second gable wall ring beam set on the second gable wall strip foundation, and a number of second gable wall columns spaced apart on the second gable wall ring beam. The top of the number of second gable wall columns is provided with an east-west oriented shoulder tube. The upper end face of the shoulder tube is flush with the upper end face of the north wall ring beam, and the shoulder tube is connected to the frame of the rear roof.

[0018] In a preferred embodiment, the outer sides of both the east-west gable wall and the north-south gable wall are provided with a gable wall layer structure, which includes, from the inside out, a polyurethane sprayed inner layer, an EPS lightweight composite partition wall board, a polyurethane sprayed outer layer, and a wall insulation mortar layer.

[0019] Calcium silicate boards are installed on the inner sides of both the east-west and north-south gable walls.

[0020] In a preferred embodiment, a rear roof insulation layer is laid on the frame of the rear roof, and the rear roof insulation layer includes bamboo plywood, polyurethane spray coating and rear roof insulation mortar layer arranged sequentially from the inside to the outside.

[0021] In a preferred embodiment, the outer surfaces of the guide slope and the north wall are covered with old plastic film removed from the original greenhouse.

[0022] In a preferred embodiment, a precast reinforced concrete slab is embedded at the excavation section of the front foot to prevent soil slippage.

[0023] In one preferred embodiment, the column support structure includes a plurality of fixed columns for supporting the rear roof and a plurality of movable columns for supporting the front roof.

[0024] The top of the fixed column is connected to the frame of the rear roof, and the bottom of the fixed column is fixed to the ground.

[0025] The frame of the front roof is equipped with several east-west longitudinal tie rods. The top of the movable column is detachably mounted on the longitudinal tie rod, and the other end of the movable column is detachably mounted on the ground. After the movable column is removed, farming machinery can operate inside the greenhouse.

[0026] In a preferred embodiment, the upper surface of the north wall is filled with concrete or soil to form the slope structure.

[0027] The beneficial effects of adopting the above technical solution are as follows:

[0028] 1. In this method, the original greenhouse enclosure walls are modified in situ as much as possible, so as not to damage the heat preservation and heat storage performance of the old thick earthen walls of the solar greenhouse, while reducing the cost of demolishing the walls and building new walls.

[0029] 2. This method increases the greenhouse's light-receiving roof angle by raising the walls, making the greenhouse's lighting more reasonable, improving the greenhouse's light and heat performance, and solving the problem of the difficulty in raising the earthen walls.

[0030] 3. In this method, the upper part of the ring beam at the front foot is higher than the ground, which effectively prevents rainwater from flowing back into the greenhouse during the rainy season. At the same time, the laying of reinforced concrete precast slabs prevents rainwater from causing the soil slope to slide and damage the plants.

[0031] 4. In the renovated thick earthen wall greenhouse, the brick columns on the inner side of the north wall, the brick wall of the north wall, and the ring beam of the north wall are firmly connected as one, which greatly strengthens the earthen structure of the north wall. At the same time, waterproofing is done on the outside of the north wall to prevent rainwater from seeping into the wall. These two measures have solved the problem of greenhouse wall collapse caused by rainwater backflow.

[0032] 5. Through the renovation of the steel frame gable wall and the steel frame, the safety and durability of the old thick earthen wall greenhouse have been enhanced.

[0033] 6. The installation of movable columns on the front roof after construction reduces costs, lowers the risk of collapse due to increased greenhouse load, and allows for mechanized operations inside the greenhouse. Attached Figure Description

[0034] Figure 1 This is a cross-sectional view of the old, thick-walled greenhouse before its renovation.

[0035] Figure 2 This is a cross-sectional view of the renovated thick-walled solar greenhouse.

[0036] Figure 3 This is a structural diagram of the repaired mud-brick mixed gable wall.

[0037] Figure 4 This is a structural diagram of the modified north-south oriented steel frame gable wall.

[0038] Figure 5 This is a vertical section view of the east-west oriented steel-framed heterogeneous composite gable wall and north wall after the renovation.

[0039] Figure 6 This is a vertical section view of the renovated brick columns, the brickwork wall on the north wall, and the ring beam on the north wall.

[0040] Figure 7 This is a cross-sectional view of the renovated brick column.

[0041] Figure 8 This is a cross-sectional view of the renovated north-south oriented, 14m span thick earthen wall solar greenhouse.

[0042] Figure 9 yes Figure 4 A schematic diagram of the structure at point A in the middle.

[0043] Figure 10 This is a schematic diagram of the movable column in the embodiment.

[0044] Figure 11 This is a schematic diagram of the lifting seat assembly and upper column of the movable column in the embodiment.

[0045] Among them: 100mm rear house insulation layer;

[0046] 1. Brick column; 2. North wall brickwork; 3. North wall ring beam; 4. Ring beam reinforcement; 5. Embedded parts; 6. Threaded steel; 7. North wall old earthen wall; 8. Sloping structure; 9. Gable wall old earthen wall; 10. Gable wall brickwork; 11. First gable wall column; 12. Gable wall longitudinal connection; 13. Gable wall reinforcing rod; 14. Calcium silicate board; 15. Second gable wall column; 16. Polyurethane spray inner layer; 17. EPS lightweight composite partition board; 18. Polyurethane spray outer layer; 19. Wall insulation mortar layer; 20. Strip foundation; 21. Shoulder pipe; 22. Front foot ring beam; 23. Reinforced concrete precast slab; 24. Rear roof frame; 25. Front roof frame; 26. Diagonal brace; 27. Fixed column; 28. Movable column; 29. ​​Longitudinal tie rod; 30. Connector; 31. Bamboo plywood; 32. Polyurethane spray coating; 33. 34 Rear roof insulation mortar layer; 35 Old plastic film; 36 First gable wall strip foundation; 37 First gable wall ring beam; 38 Frame connectors;

[0047] 28-1 Column base; 28-2 Base nail; 28-3 Lower column; 28-4 Lifting seat assembly; 28-41 Lifting screw; 28-42 Lifting base; 28-43 Rotating rod; 28-44 Thrust bearing; 28-45 Lifting seat; 28-5 Upper column; 28-51 Upper column insert; 28-6 Column hook. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the present invention clearer, the invention will be described clearly and completely below in conjunction with specific embodiments.

[0049] See Figure 1 The structure of the old, thick earthen wall greenhouse includes the old earthen wall 7 on the north side, the old front foundation and the old roof structure. The old, thick earthen wall greenhouse has sunk and the roof structure is not high enough, resulting in poor lighting performance.

[0050] A set of measures is proposed in response to this. Figure 2 , Figure 3 (or Figure 4 , Figure 5 ), Figure 6 and Figure 7 The renovation method for old, thick-walled greenhouses, as shown, involves the following specific steps:

[0051] Step 1: Remove all structural components except for the enclosing wall, referring to... Figure 1 and Figure 2 The original rolling shutter machine, insulation blanket, greenhouse film and all components were removed, leaving only the old earthen wall 7 on the north wall and the old earthen wall 9 on the east and west sides.

[0052] Step two: Repair and smooth the upper surface of the old earthen wall 7 on the north side. See details. Figure 2A supporting wall is provided on the inner side of the old earthen wall 7 of the north wall, and a north wall ring beam 3 protruding from the upper end face of the old earthen wall 7 of the north wall is provided on the supporting wall;

[0053] Step 3: Assess the extent of damage to the old earthen wall 9 of the gable wall and the conditions for reconstruction: (1) If the bottom of the gable wall is eroded by heavy rain, the damaged gable wall should be reconstructed; (2) If more than 1 / 3 of the gable wall has collapsed from top to bottom, it should be reconstructed. Repair conditions: If the top of the gable wall is damaged by no more than 1 / 3, it should be repaired. Repair or reconstruct the old earthen wall 9 of the gable wall according to the assessment results (see details). Figure 3 , Figure 4 and Figure 5 );

[0054] Step 4: Install a front base ring beam 22 10cm above the ground at the front base to prevent rainwater from flowing back into the greenhouse;

[0055] Step 5: Construct the roof structure, see details. Figure 2 The roof structure includes a front roof and a rear roof. The lower end of the front roof frame 25 is set on the front base ring beam 22, and the lower end of the rear roof frame 24 is set on the north wall ring beam 3. The frames are all made of 75*30*2.5 hot-dip galvanized elliptical tube single tube structure. The front roof frame 25 and the rear roof frame 24 are provided with diagonal supports 26 at the ridge connection to increase the support strength of the roof structure. The roof structure is provided with column support structure for support. The east and west sides of the roof structure are connected to the repaired or renovated old earthen wall 9 of the gable wall.

[0056] Step Six: A slope structure 8 is installed on the upper surface of the old earthen wall 7 on the north side, see [link / reference]. Figure 2 The slope structure 8 forms a guide slope with the rear roof to reduce rainwater retention. The guide slope and the outer surface of the modified north wall are covered with old plastic film 34 removed from the original greenhouse to increase waterproofing and recycle the original materials. The slope structure 8 can be obtained by filling with soil or concrete.

[0057] This implementation uses a ring beam structure to prevent the greenhouse from collapsing due to rainwater soaking the walls.

[0058] See Figure 2 , Figure 6 and Figure 7The supporting wall in step two includes several brick columns 1 embedded in the inner side of the north wall and a brick wall 2 of the north wall set on the several brick columns. The width of the brick column 1 is 24-37cm and the distance between two adjacent brick columns 1 is 3-4m. The north wall brickwork 2 has a height of 50-70cm and a width of 37-50cm. Its length is the east-west length of the old earthen wall 7 of the north wall, or 2-4m shorter at both ends than the east-west length of the old earthen wall 7 of the north wall. The north wall ring beam 3 is set in an east-west strip on the north wall brickwork 2. Several brick columns 1 are set at equal intervals. Four reinforcing ribs 6 (using φ12mm threaded steel) are inserted in the brick columns 1 and the north wall brickwork 2. Several embedded parts 5 are set at intervals in the north wall ring beam 3. The north wall ring beam 3 is connected to the lower end of the rear roof frame 24 through the frame connector 37 (a section of angle steel used to connect the frame and the shoulder pipe 21 or the frame and the embedded part 5, increasing the welding area and making the welding more solid) set on the embedded part 5.

[0059] See Figure 2 In step four, an east-west oriented strip foundation 20 is set at the front foot, and the front foot ring beam 22 is set on the strip foundation 20 in an east-west oriented strip shape. An east-west oriented precast reinforced concrete slab 23 is buried at the excavation section of the front foot to prevent soil slippage.

[0060] See Figure 3 The method for repairing the gable wall in step three includes: compacting and leveling the upper part of the original old earthen wall 9, and then building a 37 or 50 cm thick brick wall 10 with a height of 50-70 cm on the upper part of the original old earthen wall 9. The shape and size of the top of the brick wall 10 are adapted to the shape and size of the two sides of the roof structure.

[0061] See Figure 4 and Figure 5 The method for modifying the old earthen wall 9 in step three includes: demolishing the original old earthen wall 9, and then building an east-west wall and a north-south wall at the location of the original old earthen wall 9.

[0062] See Figure 4 The north-south gable wall includes a first gable wall strip foundation 35 arranged in the north-south direction, a first gable wall ring beam 36 arranged on the first gable wall strip foundation 35, and a plurality of first gable wall columns 11 arranged at intervals on the first gable wall ring beam 36. The top of the first gable wall columns 11 is connected to both sides of the roof structure. Specifically, the top of the first gable wall columns 11 is connected to the rear roof frame 24, the front roof frame 25 or the diagonal support 26. The diagonal support 26 adopts φ42*2.0 hot-dip galvanized round pipe. A plurality of north-south gable wall longitudinal connections 12 are provided on the plurality of first gable wall columns 11 to increase the north-south strength of the gable wall.

[0063] See Figure 5 The east-west oriented gable wall includes an east-west oriented second gable wall strip foundation, a second gable wall ring beam set on the second gable wall strip foundation, and a number of second gable wall columns 15 spaced apart on the second gable wall ring beam. Several east-west longitudinal gable wall connectors 12 are provided on the second gable wall columns 15. East-west oriented shoulder pipes 21 are provided on the top of the second gable wall columns 15. The upper end face of the shoulder pipe 21 is flush with the upper end face of the north wall ring beam 3, and the center line of the shoulder pipe 21 is aligned with the center line of the embedded part 5 in the north wall ring beam 3. The shoulder pipe 21 is connected to the framework of the rear roof. Both the gable wall columns and the gable wall longitudinal connectors 12 are made of hot-dip galvanized square steel.

[0064] In this embodiment, to increase the strength of the east-west gable wall and the north-south gable wall, several inclined gable wall reinforcing rods 13 are provided between the second gable wall column 15 and the gable wall longitudinal connection 12; several gable wall reinforcing rods 13 are also provided between the first gable wall column 11 and the gable wall longitudinal connection 12.

[0065] See Figure 4 and Figure 9 The east-west and north-south gable walls are equipped with a gable layer structure on their outer sides for insulation and waterproofing after renovation. The gable layer structure includes, from the inside out, a 3-5cm thick polyurethane sprayed inner layer 16, an EPS lightweight composite partition board 17, a 3-5cm thick polyurethane sprayed outer layer 18, and a wall insulation mortar layer 19. The wall insulation mortar layer 19 can be covered with a 0.12mm PO film for sealing. The inner sides of the east-west and north-south gable walls are equipped with calcium silicate board 14 or a 50mm thick film-sealed straw board.

[0066] See Figure 2 and Figure 9 The rear roof frame is covered with a rear roof insulation layer 100 for waterproofing and heat insulation of the rear roof. The rear roof insulation layer 100 includes a 1.0cm thick bamboo plywood 31, a 5-7cm thick polyurethane spray coating 32, and a 1-2cm thick rear roof insulation mortar layer 33, which are arranged sequentially from the inside to the outside.

[0067] See Figure 2 , Figure 10 and Figure 11 The column support structure includes a plurality of fixed columns 27 for supporting the rear roof and a plurality of movable columns 28 for supporting the front roof.

[0068] When the greenhouse span is 10-12m, a row of fixed columns 27 is installed at the rear roof, and a row of movable columns 28 is installed in the middle of the front roof, with a spacing of 3-4m. The front roof is equipped with 6-8 longitudinal tie rods 29. When the greenhouse span is 12-14m, a row of fixed columns 27 is installed at the rear roof, and a row of movable columns 28 is installed at 1 / 3 and 2 / 3 of the front roof, with a spacing of 3-4m. The front roof is equipped with no less than 8 longitudinal tie rods.

[0069] The top of the fixed column 27 is connected to the rear roof frame 24, and the bottom of the fixed column 27 is fixed to the ground. The fixed column 27 is made of hot-dip galvanized round pipe with parameters not lower than φ63*2.0.

[0070] See details Figure 2 and Figure 10 The front roof frame 25 is equipped with several east-west longitudinal tie rods 29 via herringbone clips or connectors 30. The tie rods 29 are made of hot-dip galvanized round pipe with parameters no less than φ25*2.0. The top of the movable column 28 is detachably mounted on the longitudinal tie rod 29, and the other end of the movable column 28 is detachably mounted on the ground. Removing the movable column 28 allows agricultural machinery to operate inside the greenhouse. Specifically, the movable column 28 includes, from bottom to top, a column base 28-1, a lower column 28-3, a lifting seat assembly 28-4, an upper column 28-5, and a column hook 28-6.

[0071] See details Figure 11 The lifting seat assembly 28-4 includes a lifting base 28-42, a lifting screw 28-41 disposed on the lower end face of the lifting base 28-42, a thrust bearing 28-44 disposed on the upper end face of the lifting base 28-42, and a support seat 28-45 rotatably disposed on the thrust bearing 28-44. The lower column 28-3 has a threaded hole corresponding to the lifting screw 28-41. The lifting base 28-42 is rotatably disposed on the lower column 28-3 via the lifting screw 28-41. The lifting base 28-42 is evenly provided with a plurality of rotating rods 28-43 in the circumferential direction. By driving the rotating rods 28-43, the lifting base 28-42 can be rotated, thereby raising and lowering the lifting base 28-42.

[0072] See details Figure 11 The lifting seat 28-45 is provided with a keyway, and the lower end face of the upper column 28-5 is provided with a key-shaped part. The upper column 28-5 is inserted into the keyway of the lifting seat 28-45 through the key-shaped part, thereby completing the docking of the upper column 28-5 and the lifting base 28-42.

[0073] See Figure 10The column hook 28-6 includes a hook portion at the top, a V-shaped portion at the bottom, and an opening. The hook portion of the column hook 28-6 is suspended from the longitudinal tie rod 29 through the opening. Then, the lifting seat assembly 28-4 drives the upper column 28-5 to rise, causing the V-shaped portion of the column hook 28-6 to abut against the longitudinal tie rod 29, thereby allowing the movable column 28 to support the front roof by supporting the longitudinal tie rod 29. Driving the upper column 28-5 to descend allows it to be suspended, enabling its removal and dismantling. In this embodiment, the upper movable column can be made of a hot-dip galvanized round tube with parameters no less than φ63*2.0.

[0074] See Figure 10 In this embodiment, a number (4) ground nails 28-2 are evenly arranged on the column base 28-1, which can be used to connect with the ground.

[0075] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for renovating an old, thick-walled solar greenhouse, characterized in that, It includes the following steps: Step 1: Remove all components except the enclosure wall, including the original roller shutter machine, insulation blanket, and greenhouse film. Step 2: Repair and smooth the upper surface of the old earthen wall on the north side, and set up a supporting wall on the inner side of the old earthen wall on the north side. The supporting wall is equipped with a north wall ring beam that protrudes from the upper surface of the old earthen wall on the north side. Step 3: Modify the old earthen wall of the gable. The method of modifying the old earthen wall of the gable includes: demolishing the old earthen wall of the gable, and then building an east-west gable and a north-south gable at the location of the old earthen wall. The north-south gable wall includes a first gable wall strip foundation set in the north-south direction, a first gable wall ring beam set on the first gable wall strip foundation, and a number of first gable wall columns set at intervals on the first gable wall ring beam. A number of north-south gable wall longitudinal connections are set on the number of first gable wall columns. The east-west gable wall includes an east-west oriented second gable wall strip foundation, a second gable wall ring beam set on the second gable wall strip foundation, and a number of second gable wall columns spaced apart on the second gable wall ring beam. The top of the number of second gable wall columns is provided with an east-west oriented shoulder tube, and the upper end face of the shoulder tube is flush with the upper end face of the north wall ring beam. The outer sides of the east-west gable walls and the north-south gable walls are provided with a gable wall layer structure, which includes, from the inside out, a polyurethane spray inner layer, an EPS lightweight composite partition wall board, a polyurethane spray outer layer, and a wall insulation mortar layer. Calcium silicate boards are installed on the inner sides of both the east-west and north-south gable walls. Step 4: Install a front abutment ring beam that is raised above the ground at the front abutment. Step 5: Construct the roof structure, which includes a front roof and a rear roof. The front roof includes a front roof frame, and the rear roof includes a rear roof frame. The lower end of the front roof frame is set on the front base ring beam, and the lower end of the rear roof frame is set on the north wall ring beam. A column support structure is provided below the roof structure for support. The two sides of the roof structure are connected to the top of the first gable wall column, and the rear roof frame is connected to the shoulder tube. Step Six: Fill and install a slope structure on the upper surface of the old earthen wall on the north wall, and the slope structure forms a guide slope with the rear roof.

2. The method for renovating an old, thick-walled solar greenhouse according to claim 1, characterized in that, The supporting wall includes several brick columns embedded inside the old earthen wall of the north wall and a brick wall of the north wall set on several brick columns. The north wall ring beam is set on the brick wall of the north wall. The several brick columns are set at equal intervals. Several reinforcing bars are inserted in the brick columns and the brick wall of the north wall. Several embedded parts are set in the north wall ring beam. The north wall ring beam is connected to the lower end of the frame of the rear roof through the embedded parts.

3. The method for renovating an old, thick-walled solar greenhouse according to claim 1, characterized in that, The rear roof frame is covered with a rear roof insulation layer, which includes bamboo plywood, polyurethane spray coating and rear roof insulation mortar layer arranged sequentially from the inside to the outside.

4. The method for renovating an old, thick-walled solar greenhouse according to claim 1, characterized in that, The outer surfaces of the guide slope and the old earthen wall of the north wall are covered with old plastic film removed from the original greenhouse.

5. The method for renovating an old, thick-walled solar greenhouse according to claim 1, characterized in that, A precast reinforced concrete slab is embedded in the excavated section of the front foot to prevent soil slippage.

6. The method for renovating an old, thick-walled solar greenhouse according to claim 1, characterized in that, The column support structure includes a number of fixed columns for supporting the rear roof and a number of movable columns for supporting the front roof. The top of the fixed column is connected to the frame of the rear roof, and the bottom of the fixed column is fixed to the ground. The frame of the front roof is equipped with several east-west longitudinal tie rods. The top of the movable column is detachably mounted on the longitudinal tie rod, and the other end of the movable column is detachably mounted on the ground. After the movable column is removed, farming machinery can operate inside the greenhouse.

7. The method for renovating an old, thick-walled solar greenhouse according to claim 1, characterized in that, The upper surface of the old earthen wall on the north side is filled with concrete or soil to form the slope structure.

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