Reinforcement cage pile foundation construction method applying short line matching method

Abstract

According to the reinforcement cage pile foundation construction method applying the short-line matching method, the reinforcement cage is manufactured and installed through the short-line matching method, the reinforcement cage binding space is formed by the fixed end and the movable end, the one-time qualification rate of main reinforcement connection is ensured through refined construction when the reinforcement cage is hoisted in a segmented mode, and the rework phenomenon of manufacturing and installation of the reinforcement cage is reduced. The construction efficiency can be greatly improved, materials are simple and easy to operate, the whole process is reasonable, safe, reliable and high in feasibility, good economic benefits are achieved, and the problems that in traditional reinforcement cage construction, a manufacturing device for segmented installation of the ultra-long reinforcement cage is low in reuse rate and high in manufacturing cost are solved.

Description

Technical Field

[0001] The invention relates to the field of steel cage pile foundation construction, and in particular to a steel cage pile foundation construction method using a short-line matching method. Background Art

[0002] The short-line matching method in steel cage processing is a method used in the prefabrication of steel cages. The first manufactured steel cage segment is used as the matching beam segment, and the later manufactured steel cage segment is matched with it. By precisely controlling the cutting, bending, and binding processes of the steel bars, the size and shape accuracy of each steel cage section is guaranteed, so that it can be spliced ​​and installed quickly and accurately on site.

[0003] The overall lifting of extra-long steel cages uses heavy lifting equipment, which poses a great safety risk, requires a wide site, and has high rental costs. The segmented lifting of steel cages has a low cost and a lower safety risk. The conventional process of segmented lifting of steel cages has a low pass rate for main reinforcement connections, and there are major quality risks in pile foundation construction, with a high rework rate. The one-time pass rate for the main reinforcement connections of the steel cages is particularly important, and there are defects in its use that need to be improved. Summary of the invention

[0004] The main purpose of the present invention is to provide a reinforcement cage pile foundation construction method using a short-line matching method, which solves the problem of low reuse rate and high cost of manufacturing equipment for segmented installation of super-long reinforcement cages in traditional reinforcement cage construction.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a reinforcement cage pile foundation construction method using a short-line matching method, the method comprising: S1. Cut the length of main reinforcement of multiple standard sections; S2. Then use professional equipment to thread both ends of all main bars, one end is half-threaded and the other end is fully threaded. After threading, both ends of the main bars are upset; S3, placing a plurality of main bars in a manufacturing device and tying them into a steel cage as a standard segment; S4, align the main reinforcement of the next segment with the main reinforcement of the standard segment in the manufacturing device and connect them in sequence using a straight thread sleeve; S5, repeat step S4 to complete the binding of the second section of the steel cage. After the binding is completed, remove the straight thread sleeve, and then use the sling to transfer the first section of the steel cage. Then, repeat steps S1 to S6 to complete the continuous production of the steel cage. S6. At the transportation site of the first steel cage section, use a crane to hoist the first steel cage section, first hoist the first steel cage section into the pile foundation hole, and fix the top of the first steel cage section with square steel; S7. Use a crane to hoist the second steel cage onto the first steel cage, butt the main bars of the two steel cages together, and connect them using straight threaded sleeves; S5. Repeat steps S6 to S7 to complete the hoisting of the entire pile foundation reinforcement cage.

[0006] In the preferred embodiment, in step S3, the manufacturing device includes a mobile end and a fixed end, the space between the mobile end and the fixed end is used to bind the steel cage, the steel cage is placed on a plurality of evenly distributed circular drums, and a plurality of limit frames are provided between the circular drums.

[0007] In a preferred embodiment, the mobile end includes a first base, a first vertical tie beam is provided on one side of the first base, a plurality of first main beams are provided between the first base and the first tie beam, and a first diagonal brace is provided between the first tie beam and the first main beam; The bottom of the first base is movably connected to the ground.

[0008] In a preferred embodiment, the fixed end includes a second base, a second tie beam is vertically arranged on one side of the second base, a plurality of second main beams are arranged between the second base and the second tie beam, and a second diagonal brace is arranged between the second tie beam and the second main beam; The bottom of the second base is anchored to the ground.

[0009] In a preferred embodiment, the second tie beam is arranged opposite to the first tie beam, and the main reinforcement in step S3 is placed between the second tie beam and the first tie beam.

[0010] In the preferred embodiment, the limiting frame includes a steel section, and a plurality of vertical clips are arranged above the steel section. The vertical clips are used to limit the width of the steel cage, and buckles are arranged in the vertical clips, which are used to place the main bars.

[0011] In the preferred embodiment, a steel groove is provided on the steel section, a long hole is also provided in the steel groove, a vertical clamp is arranged in the steel groove, a transverse bolt is provided at the bottom of the vertical clamp, and the transverse bolt is used to control the transverse movement of the vertical clamp; A vertical slide is provided on the vertical pallet, the main reinforcement is placed in the vertical slide, a side vertical plate is provided on one side of the vertical slide, a long hole is provided on the side vertical plate, a buckle is arranged in the long hole and can slide up and down, and the buckle is used to control the height of the main reinforcement.

[0012] In the preferred embodiment, the length accuracy of the main reinforcement bars of the steel cage in the same section in step S1 reaches ±2 mm.

[0013] In the preferred embodiment, in step S3, the preparation method is: S31, placing the main bars of the four steel cages on the limit frame, so that the main bars and stirrups are erected to form a steel cage skeleton; S32. Tie the main reinforcement of the steel cage in equal intervals, with one end of the main reinforcement supporting the fixed end, to ensure that all the main reinforcements are uniformly installed on the vertical surface; S33. Push the moving end of the other end of the main reinforcement forward and grind the uneven main reinforcement until both ends of all the main reinforcements are on the same vertical plane.

[0014] In the preferred solution, in step S32, the main reinforcement is tied twice. After the first main reinforcement is tied and fixed, the mobile end is moved back 1m and fixed, and the second row of main reinforcement is tied with a 1m gap. The main reinforcement is aligned with the mobile end, and the main reinforcement at the fixed end is polished to ensure that the length of the vertical surface remains consistent.

[0015] The present invention provides a method for constructing a steel cage pile foundation using a short-line matching method, which has the following beneficial effects: the steel cage is manufactured and installed by the short-line matching method, the fixed end and the movable end form a steel cage binding space, and the one-time qualified rate of the main reinforcement connection is ensured when the steel cage is hoisted in sections through refined construction, and the rework phenomenon of steel cage manufacturing and installation is reduced. It can greatly improve the construction efficiency, the materials are simple and easy to operate, the overall process is reasonable and safe and reliable, the feasibility is high, and it has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the first step of manufacturing the first section of the steel cage of the present invention; Figure 2 This is a schematic diagram of the second step of manufacturing the first section of the steel cage of the present invention; Figure 3 This is a schematic diagram of the third step of manufacturing the first section of the steel cage of the present invention; Figure 4 This is a schematic diagram showing the completion of the production of the first section of the steel cage of the present invention; Figure 5 This is a schematic diagram of the first step of making the steel cage matching of the present invention; Figure 6 This is a schematic diagram of the second step of manufacturing the steel cage matching of the present invention; Figure 7 This is a schematic diagram of the third step of manufacturing the steel cage matching of the present invention; Figure 8 This is a schematic diagram of the completion of the matching and manufacturing of the steel cage of the present invention; Fig. 9 This is a schematic diagram of the lifting of the steel cage after it is manufactured according to the present invention; Fig.10 This is a schematic diagram of the first step of manufacturing the head and tail steel cages of the present invention; Fig.11 This is a schematic diagram of the second step of manufacturing the head and tail steel reinforcement cages of the present invention; Fig.12 This is a schematic diagram of the completion of the manufacturing of the first and last reinforcement cages of the present invention; Fig.13 This is a schematic diagram of the hoisting of the first and last reinforcement cages of the present invention; Fig.14 It is a plan view of the lifting installation of the present invention; Fig.15 It is a schematic diagram of the longitudinal section of the lifting installation of the present invention; Fig.16 It is a longitudinal section schematic diagram of adjusting the lifting posture of the steel cage of the present invention; Fig.17 This is a schematic diagram of the installation of the first section of the steel cage of the present invention; Fig.18 It is a schematic diagram of the main reinforcement connection of a multi-section steel cage of the present invention; Fig.19 It is a schematic diagram of lowering a multi-section steel cage of the present invention; Fig. 20 It is a structural schematic diagram of the limiting frame of the present invention.

[0017] In the figure: mobile end 1; first base 101; first main beam 102; first tie beam 103; first diagonal brace 104; movable end 2; second base 201; second main beam 202; second tie beam 203; second diagonal brace 204; steel cage 3; main reinforcement 301; stirrups 302; half wire 3011; full wire 3012; round drum 4; limit frame 5; steel section 501; vertical clamping plate 502; buckle 503; steel section groove 504; transverse bolt 505; vertical slide groove 506; side vertical plate 507; crane 6; sling 7; straight thread sleeve 9. DETAILED DESCRIPTION

[0018] Example 1 like Figure 1-20 As shown, a method for constructing a steel cage pile foundation using a short-line matching method comprises: S1. Cut the length of main reinforcement 301 of multiple standard sections; S2. Then use professional equipment to thread both ends of all main bars 301, one end is half-threaded 3011, the other end is full-threaded 3012, and both ends of the main bars 301 after threading are upset; S3, placing a plurality of main reinforcements 301 in a manufacturing device and tying them into a reinforcement cage 3 as a standard segment; S4, align the main reinforcement 301 of the next segment with the main reinforcement 301 of the standard segment in the manufacturing device and connect them in sequence using a straight thread sleeve 9; S5, repeat step S4 to complete the binding of the second section of the steel cage 3. After the binding is completed, the straight thread sleeve 9 is removed, and the first section of the steel cage 3 is transported by the sling 7. Then, repeat steps S1 to S6 to complete the continuous production of the steel cage 3; S6, the first section of the steel cage 3 is transported to the site, and the first section of the steel cage 3 is hoisted by the crane 6. The first section of the steel cage 3 is first hoisted into the pile foundation hole, and the top of the first section of the steel cage 3 is fixed with square steel; S7, using a crane 6 to hoist the second steel cage 3 onto the first steel cage 3, butting the main bars 301 of the two steel cages together, and connecting them using a straight threaded sleeve 9; S5. Repeat steps S6 to S7 to complete the hoisting of the entire pile foundation reinforcement cage.

[0019] In the preferred embodiment, in step S3, the manufacturing device includes a mobile end 1 and a fixed end 2, the space between the mobile end 1 and the fixed end 2 is used to bind the steel cage 3, the steel cage 3 is placed on a plurality of evenly distributed circular drums 4, and a plurality of limit frames 5 are provided between the circular drums 4.

[0020] In the preferred embodiment, the mobile terminal 1 includes a first base 101, a vertical first tie beam 103 is provided on one side of the first base 101, a plurality of first main beams 102 are provided between the first base 101 and the first tie beam 103, and a first diagonal brace 104 is provided between the first tie beam 103 and the first main beam 102; The bottom of the first base 101 is movably connected to the ground.

[0021] In the preferred embodiment, the fixed end 2 includes a second base 201, a second tie beam 203 is vertically arranged on one side of the second base 201, a plurality of second main beams 202 are arranged between the second base 201 and the second tie beam 203, and a second diagonal brace 204 is arranged between the second tie beam 203 and the second main beam 202; The bottom of the second base 201 is anchored on the ground.

[0022] In a preferred solution, the second tie beam 203 and the first tie beam 103 are arranged opposite to each other, and the main reinforcement 301 in step S3 is placed between the second tie beam 203 and the first tie beam 103 .

[0023] In the preferred embodiment, the limiting frame 5 includes a steel section 501, and a plurality of vertical clips 502 are arranged above the steel section 501. The vertical clips 502 are used to limit the width of the steel cage 3. Buckles 503 are arranged inside the vertical clips 502, and the buckles 503 are used to place the main reinforcement 301.

[0024] In the preferred embodiment, a steel groove 504 is provided on the steel 501, and a long hole is also provided in the steel groove 504. The vertical clamping plate 502 is arranged in the steel groove 504, and a transverse bolt 505 is provided at the bottom of the vertical clamping plate 502. The transverse bolt 505 is used to control the transverse movement of the vertical clamping plate 502; A vertical slide groove 506 is provided on the vertical clamping plate 502, and the main reinforcement 301 is placed in the vertical slide groove 506. A side vertical plate 507 is provided on one side of the vertical slide groove 506. The side vertical plate 507 is provided with a long hole. The buckle 503 is arranged in the long hole and can slide up and down. The buckle 503 is used to control the height of the main reinforcement 301.

[0025] In the preferred embodiment, the length accuracy of the main bars 301 of the steel cage 3 in the same section in step S1 reaches ±2 mm.

[0026] In the preferred embodiment, in step S3, the preparation method is: S31, placing the main bars 301 of the four steel cages 3 on the limiting frame 5, so that the main bars 301 and the stirrups 302 are erected to form the skeleton of the steel cage 3; S32, tying the main reinforcement 301 of the steel cage 3 in sequence and at equal intervals, with one end of the main reinforcement 301 supporting the fixed end 2, to ensure that all the main reinforcement 301 are uniformly installed on the vertical plane; S33. The other end of the main reinforcement 301 pushes the moving end 1 forward and grinds the uneven main reinforcement 301 until both ends of all the main reinforcements 301 are on the same vertical plane.

[0027] In the preferred solution, in step S32, the main reinforcement 301 is tied twice. After the main reinforcement 301 is tied and fixed for the first time, the mobile end 1 is moved back 1m and fixed, and then the second row of main reinforcement 301 is tied with a gap of 1m. The main reinforcement 301 is aligned with the mobile end 1, and the main reinforcement 301 at the fixed end 2 is polished to ensure that the length of the vertical surface remains consistent. The detailed construction steps of a steel cage pile foundation construction method using the short-line matching method are as follows: Before construction, conduct a comprehensive survey of the construction site, including the collection and analysis of information such as geological conditions, groundwater level, and surrounding environment, to provide basic data for subsequent construction. At the same time, according to the design requirements, prepare the required materials, such as main reinforcement 301, stirrups 302, straight thread sleeves 9, steel sections, etc., and ensure that their quality meets relevant standards. Inspect and debug professional equipment to ensure that the equipment can operate normally during the construction process.

[0028] According to the construction drawings and site conditions, the placement of the manufacturing device is planned to ensure the stability of its installation position and the convenience of operation. At the same time, the hoist 7 and the crane 6 are prepared, and they are subjected to safety inspection and load test to ensure that they can safely lift the required weight of the steel cage 3.

[0029] S1: According to the design requirements, the length of the main reinforcement 301 of each standard section is accurately calculated to ensure that the length accuracy of the main reinforcement 301 of the steel cage 3 in the same section reaches ±2mm. Considering the subsequent processing and connection technology, a certain processing allowance is reserved during cutting. On the basis of the calculated length, an additional 10mm length is added to each main reinforcement 301 for subsequent processing procedures such as threading, upsetting and grinding.

[0030] S2: Use high-precision cutting equipment to cut the length of multiple standard sections of main reinforcement 301. The cutting equipment should have accurate length measurement and positioning functions to ensure cutting accuracy. During the cutting process, each cut main reinforcement 301 should be numbered and marked for subsequent processing and assembly operations.

[0031] S3: Use professional equipment to thread both ends of all main bars 301, one end is half-threaded 3011, and the other end is full-threaded 3012. The threading equipment should be accurately adjusted according to the diameter of the main bar 301 and the required thread specifications to ensure that the threading depth, pitch and tooth shape meet the design requirements. During the threading process, the threading quality is monitored in real time and spot checks are carried out using thread gauges to ensure that the threading quality is qualified.

[0032] S4: The ends of the main reinforcement 301 after threading are upset. The upset diameter is determined according to the design requirements. Generally, the ends of the main reinforcement 301 can be upset to 10%-20% larger than the original diameter to enhance the strength of the connection. The upsetting equipment should use advanced hydraulic upsetting machines to ensure the uniformity and dimensional accuracy of the upsetting. After upsetting, the upsetting parts are inspected for quality, including appearance inspection. The surface should be smooth and free of cracks, and the dimensions are measured to ensure that the upsetting quality meets the requirements.

[0033] S5: Install the mobile end 1 and the fixed end 2 of the manufacturing device at the predetermined position. For the mobile end 1, the bottom of the first base 101 can be connected to the ground by rollers, and a locking device can be set to facilitate the movement and positioning of the mobile end 1. The first tie beam 103, the first main beam 102 and the first diagonal brace 104 on the first base 101 are accurately installed and connected to ensure the stability of the structure. The spacing of the first main beam 102 can be designed to be 500mm-800mm according to the size of the steel cage 3 to ensure that the steel cage 3 can be effectively supported.

[0034] S6: For the fixed end 2, the bottom of the second base 201 is firmly anchored to the ground with expansion bolts to ensure that the fixed end 2 will not move during the construction process. The installation of the second tie beam 203, the second main beam 202 and the second diagonal brace 204 also needs to ensure the firmness and verticality of the structure.

[0035] S7: Install the steel section 501 of the limit frame 5 between the movable end 1 and the fixed end 2 at a predetermined spacing, and the spacing can be set to 2m-3m to ensure that the steel cage 3 can be evenly supported. Finely adjust and install the steel section groove 504, vertical clamping plate 502, buckle 503, vertical slide groove 506 and side vertical plate 507 on the steel section 501. The spacing of the vertical clamping plate 502 can be designed according to the spacing of the main reinforcement 301, which is generally 150mm-200mm. The width of the vertical slide groove 506 should be slightly larger than the diameter of the main reinforcement 301 to ensure that the main reinforcement 301 can be smoothly inserted and can be moved and adjusted within a certain range.

[0036] S8: four main bars 301 of the steel cage 3 are placed on the limiting frame 5, so that the main bars 301 and the stirrups 302 are erected to form the skeleton of the steel cage 3. When placing the main bars 301, the buckles 503 and the vertical slide grooves 506 on the limiting frame 5 are used to preliminarily locate and adjust the positions of the main bars 301.

[0037] S9: Tie the main bars 301 of the steel cage 3 at equal intervals in sequence, with one end of the main bar 301 supporting the fixed end 2, to ensure that all the main bars 301 are uniformly installed on the vertical surface. High-strength steel wire can be used as the binding material, and the binding spacing is set according to the design requirements. In the length direction of the main bar 301, one binding is performed every 200mm-300mm.

[0038] S10: The main reinforcement 301 is tied twice. After the first main reinforcement 301 is tied and fixed, the mobile end 1 is moved back 1m to be fixed, and the second row of main reinforcement 301 is tied 1m apart. The main reinforcement 301 is aligned with the mobile end 1, and the main reinforcement 301 of the fixed end 2 is polished to ensure that the length of the vertical surface is consistent. During the polishing process, fine polishing is performed using equipment such as a grinder. The surface roughness after polishing is controlled within Ra3.2 to ensure the flatness of subsequent connections.

[0039] S11: During the binding process, a laser level or other measuring tool can be used to measure the verticality and flatness of the steel cage 3 in real time to ensure that the overall shape of the steel cage 3 meets the design requirements. For the steel cage 3 that has been bound, a temporary support structure can be used to reinforce it to prevent deformation during subsequent operations.

[0040] S12: Align the main reinforcement 301 of the next segment with the main reinforcement 301 of the standard segment in the manufacturing device and connect them in sequence using the straight thread sleeve 9. Before connecting, clean the threaded part of the main reinforcement 301 to remove impurities such as oil and rust to ensure the connection quality. Use a torque wrench to tighten the straight thread sleeve 9. The torque value is determined according to the specifications and design requirements of the straight thread sleeve 9. For a straight thread sleeve 9 with a diameter of 20 mm, the tightening torque can be set to 200N·m-300N·m.

[0041] S13: During the connection process, use a special butt joint tool to position and assist the connection of the main reinforcement 301 to ensure the concentricity and verticality of the butt joint. Inspect the connected parts and use non-destructive testing methods such as ultrasonic testing to check the integrity and reliability of the connection.

[0042] S14: Repeat step S4 to complete the binding of the second section of the steel cage 3. During the binding process, reinforcing ribs may be arranged inside the steel cage 3 according to design requirements, and the spacing of the reinforcing ribs may be set to 2m to enhance the overall strength of the steel cage 3.

[0043] S15: After the binding is completed, the straight thread sleeve 9 is removed. Special tools are used during the removal process to avoid damage to the main reinforcement 301 and the reinforcement cage 3.

[0044] S16: Use the lifting device 7 to transfer the first section of the steel cage 3. The lifting device 7 should be selected according to the weight and size of the steel cage 3 to ensure that it has sufficient load-bearing capacity and safety factor. During the transportation process, the steel cage 3 is towed and controlled by a traction rope to prevent it from swinging and colliding. Then, repeat steps S1 to S6 to complete the continuous production of the steel cage 3.

[0045] S17: The first section of the steel cage 3 is transported to the site and hoisted by the crane 6. Before hoisting, the hoisting parameters of the crane 6 are reconfirmed, including the lifting weight, lifting height, amplitude, etc. The first section of the steel cage 3 is hoisted into the pile foundation hole, and the hoisting speed is controlled at 0.5m / s-1m / s to ensure the stability of the hoisting.

[0046] S18: Fix the top of the first section of the steel cage 3 with square steel. The specifications of the square steel are selected according to the size and weight of the steel cage 3. The square steel and the steel cage 3 are connected by welding or bolting. The welding quality should be ensured during welding, and the weld should be full without defects such as slag inclusion and pores.

[0047] S19: Use the crane 6 to hoist the second steel cage 3 onto the first steel cage 3, butt the main bars 301 of the two steel cages, and connect them using the straight thread sleeve 9. During the hoisting process, use a laser alignment device to accurately align the positions of the two steel cages 3 to ensure that the butt accuracy of the main bars 301 is within ±5 mm.

[0048] S20: Repeat steps S6 to S7 to complete the hoisting of the entire pile foundation steel cage. After each section of the steel cage 3 is hoisted, the installed steel cage 3 is inspected, including the position, verticality, connection quality, etc., and any problems are found and adjusted in time. At the same time, temporary supports can be set around the steel cage 3 to prevent it from displacement or deformation during the subsequent construction process.

[0049] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for constructing a steel cage pile foundation using a short-line matching method, characterized in that: The method includes: S1. Cut the length of main reinforcement (301) of multiple standard sections; S2. Then use professional equipment to thread both ends of all main bars (301), one end is half-threaded (3011), and the other end is full-threaded (3012). After threading, both ends of the main bars (301) are upset; S3, placing a plurality of main reinforcement bars (301) in a manufacturing device and tying them into a reinforcement cage (3) as a standard segment; S4, aligning the main reinforcement (301) of the next segment with the main reinforcement (301) of the standard segment in the manufacturing device and connecting them in sequence using a straight thread sleeve (9); S5, repeat step S4 to complete the binding of the second section of the steel cage (3), remove the straight thread sleeve (9) after the binding is completed, and then use the lifting device (7) to transfer the first section of the steel cage (3), and then repeat steps S1 to S6 to complete the continuous production of the steel cage (3); S6, the first section of the steel cage (3) is transported to the site, and the first section of the steel cage (3) is hoisted by a crane (6), and the first section of the steel cage (3) is first hoisted into the hole in the pile foundation, and the top of the first section of the steel cage (3) is fixed with square steel; S7, using a crane (6) to hoist the second steel cage (3) onto the first steel cage (3), butting the main bars (301) of the two steel cages together, and connecting them using a straight threaded sleeve (9); S5. Repeat steps S6 to S7 to complete the hoisting of the entire pile foundation reinforcement cage.

2. According to claim 1, a method for constructing a steel cage pile foundation using a short-line matching method is characterized in that: In step S3, the manufacturing device comprises a mobile end (1) and a fixed end (2), the space between the mobile end (1) and the fixed end (2) is used to bind the steel cage (3), the steel cage (3) is placed on a plurality of evenly distributed circular rollers (4), and a plurality of limit frames (5) are provided between the circular rollers (4).

3. According to claim 2, a method for constructing a steel cage pile foundation using a short-line matching method is characterized in that: The mobile end (1) comprises a first base (101), a first tie beam (103) is provided on one side of the first base (101), a plurality of first main beams (102) are provided between the first base (101) and the first tie beam (103), and a first diagonal brace (104) is provided between the first tie beam (103) and the first main beam (102); The bottom of the first base (101) is movably connected to the ground.

4. According to claim 2, a method for constructing a steel cage pile foundation using a short-line matching method is characterized in that: The fixed end (2) comprises a second base (201), a second tie beam (203) is provided on one side of the second base (201), a plurality of second main beams (202) are provided between the second base (201) and the second tie beam (203), and a second diagonal brace (204) is provided between the second tie beam (203) and the second main beam (202); The bottom of the second base (201) is anchored on the ground.

5. A method for constructing a steel cage pile foundation using a short-line matching method according to claim 4, characterized in that: The second tie beam (203) and the first tie beam (103) are arranged opposite to each other, and the main reinforcement (301) in step S3 is placed between the second tie beam (203) and the first tie beam (103).

6. The method for constructing a steel cage pile foundation using a short-line matching method according to claim 2 is characterized in that: The limiting frame (5) comprises a steel section (501), and a plurality of vertical clamping plates (502) are arranged above the steel section (501), wherein the vertical clamping plates (502) are used to limit the width of the steel cage (3), and buckles (503) are arranged inside the vertical clamping plates (502), and the buckles (503) are used to place the main reinforcement (301).

7. A method for constructing a steel cage pile foundation using a short-line matching method according to claim 6, characterized in that: A steel groove (504) is provided on the steel section (501), a long hole is also provided in the steel groove (504), a vertical clamping plate (502) is arranged in the steel groove (504), a transverse bolt (505) is provided at the bottom of the vertical clamping plate (502), and the transverse bolt (505) is used to control the transverse movement of the vertical clamping plate (502); A vertical slide groove (506) is provided on the vertical clamping plate (502), and the main reinforcement (301) is placed in the vertical slide groove (506). A side vertical plate (507) is provided on one side of the vertical slide groove (506), and a long hole is provided on the side vertical plate (507). A buckle (503) is arranged in the long hole and can slide up and down. The buckle (503) is used to control the height of the main reinforcement (301).

8. The method for constructing a steel cage pile foundation using a short-line matching method according to claim 1 is characterized in that: In step S1, the length accuracy of the main reinforcement (301) of the reinforcement cage (3) in the same section reaches ±2 mm.

9. The method for constructing a steel cage pile foundation using a short-line matching method according to claim 1, characterized in that: In step S3, the production method is: S31, placing the main bars (301) of the four steel cages (3) on the limiting frame (5), so that the main bars (301) and the stirrups (302) are erected to form a skeleton of the steel cage (3); S32, tying the main reinforcements (301) of the reinforcement cage (3) in sequence and at equal intervals, with one end of the main reinforcement (301) supporting the fixed end (2), to ensure that all the main reinforcements (301) are uniformly installed on the vertical plane; S33, the other end of the main reinforcement (301) pushes the moving end (1) forward, and grinds the uneven main reinforcement (301) until both ends of all the main reinforcements (301) are on the same vertical plane.

10. The method for constructing a steel cage pile foundation using a short-line matching method according to claim 8, characterized in that: In step S32, the main reinforcement (301) is tied twice. After the main reinforcement (301) is tied and fixed for the first time, the movable end (1) is moved back 1m to be fixed, and the second row of main reinforcement (301) is tied 1m apart. The main reinforcement (301) is aligned with the movable end (1), and the main reinforcement (301) at the fixed end (2) is polished to ensure that the length of the vertical surface remains consistent.

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