A construction method for breaking the SMW method pile door by pipe jacking

Abstract

The present invention provides a construction method for breaking the SMW construction method pile hole door by pipe jacking construction, the method relies on a mobile frame, including a main frame body whose inner cavity can accommodate H-shaped steel, one end of the main frame body is open, and the upper and lower ends of the two side ends adjacent to the open end are fixedly connected with longitudinal reinforcements, and the two opposite longitudinal reinforcements are movably connected with a transversely arranged pin shaft; the construction method includes the following steps: 1) chiseling away cement soil and chiseling out the H-shaped steel; 2) the H-shaped steel is sleeved into the main frame body from the open end, and cut from the upper and lower ends of the H-shaped steel respectively, and cutting holes are set at the cutting parts; 3) the pin shaft passes through the cutting hole and is fixed on the longitudinal reinforcement; 4) the H-shaped steel is moved outward by dragging the pin shaft by a lifting mechanism. In the present invention, the H-shaped steel only needs to be cut up and down twice, and the whole is cut and moved outward and hoisted out, which greatly reduces the cutting workload, saves manpower, and improves construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe jacking construction, and in particular to a construction method for breaking a SMW method pile hole door through pipe jacking construction. Background Art

[0002] To normally break the SMW construction piles corresponding to the tunnel gate, it is necessary to set up a scaffold, break the cement soil first, and then cut and hoist the H-shaped steel in sections. This is mainly due to the high safety risk of overall cutting, including the overall hoisting risk and the risk of collision with operators. Segmented cutting is conducive to reducing the risk. The cutting volume of segmented cutting is large, and during the cutting and hoisting process, it is necessary to cut a hoisting hole on the H-shaped steel each time and hoist it out with a crane lug. The cut H-shaped steel needs to be lifted from the tunnel gate position to a vertical hoisting state. There will be a swinging process, there is inertia, and there is a certain safety risk. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a construction method for breaking the SMW method pile hole door by pipe jacking construction, which can cut the H-shaped steel as a whole and then move it outward and transport it, saving manpower, being safe and stable, and having high construction efficiency.

[0004] Based on the above problems, the technical solution proposed in the present invention is a construction method for breaking the pile hole door of the SMW construction method by pipe jacking construction. The method relies on a mobile frame used for breaking the pile hole door of the SMW construction method by pipe jacking construction. The mobile frame includes a main frame body with an inner cavity that can accommodate H-shaped steel, and a ladder movably connected to both sides of the top of the main frame. One end of the main frame is open, and the upper and lower sides of the two side ends adjacent to the open end are fixedly connected with longitudinal reinforcement, and the two opposite longitudinal reinforcements are movably connected with a transversely arranged pin shaft.

[0005] Among them, the length of the main frame is 2.5 to 3 times the length of the H-shaped steel.

[0006] Furthermore, the longitudinal reinforcement is made of load-bearing I-beams or steel bars welded into bundles to bear the load.

[0007] Furthermore, the longitudinal reinforcement located at the upper end of the main frame is kept at a certain distance from the top end of the main frame, and the longitudinal reinforcement located at the lower end of the main frame is kept at a certain distance from the lower end of the main frame.

[0008] Furthermore, the top rods at both side ends adjacent to the open end are rotatably connected to sleeve shafts, and the top end of the ladder is fixedly connected to the sleeve shafts.

[0009] The construction method comprises the following steps:

[0010] 1) Remove the cement soil and chisel out the H-shaped steel;

[0011] 2) Put the H-shaped steel into the main frame, cut it from the upper and lower ends respectively, and set cutting holes in the cutting parts;

[0012] 3) The pin passes through the cutting hole and is fixed on the longitudinal rib;

[0013] 4) Use the lifting mechanism to drag the pin to move the H-beam outward.

[0014] The cutting hole at the upper end of the H-shaped steel is located 10 to 30 cm below the cutting position, and the cutting hole at the lower end of the H-shaped steel is located 10 to 30 cm above the cutting position.

[0015] Among them, step 2) is to put the H-shaped steel into the main frame, cut it from the upper end, set a cutting hole at the cut-off part, and partially cut it at the lower end. The H-shaped steel is moved horizontally in the main frame space by knocking until the H-shaped steel is completely out of its original position, and then a cutting hole is set at the lower end of the H-shaped steel.

[0016] Wherein, the lifting mechanism is a hand winch. After the hand winch moves the H-shaped steel out of the tunnel door, a crane is used to lift the cut H-shaped steel out as a whole.

[0017] Advantages and beneficial effects of the present invention:

[0018] 1. H-shaped steel only needs to be cut twice, up and down, and then moved out and lifted out after being cut as a whole, which greatly reduces the cutting workload and saves manpower.

[0019] 2. The frame structure is reasonable, safe and stable, and the safety of workers is guaranteed during the process of chiseling cement soil and cutting H-shaped steel.

[0020] 3. The frame can be transported as a whole without the need for temporary scaffolding, thus improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional view of the mobile frame of the present invention.

[0022] Figure 2 It is a front view of a mobile frame of the present invention.

[0023] Figure 3 It is a side view of the mobile frame for fixing H-shaped steel of the present invention.

[0024] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at A in the middle

[0025] Among them: 1. Main frame; 2. Ladder; 3. Longitudinal reinforcement; 4. Pin shaft; 5. Fixing rope; 6. Sleeve shaft; 7. Cutting hole. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-Figure 3As shown, a construction method for breaking the pile hole door of the SMW construction method by pipe jacking construction, the method relies on a mobile frame used for breaking the pile hole door of the SMW construction method by pipe jacking construction, the mobile frame includes a main frame body 1 whose inner cavity can accommodate H-shaped steel, and a ladder 2 movably connected to both sides of the top of the main frame body 1, one end of the main frame body 1 is open, and the upper and lower sides of the two side ends adjacent to the open end are fixedly connected with longitudinal reinforcement 3, and the two opposite longitudinal reinforcements 3 are movably connected with a transversely arranged pin shaft 4.

[0028] The length of the main frame 1 is 2.5 to 3 times the length of the H-shaped steel, which ensures that the H-shaped steel can be framed and that there is enough space to pull out the H-shaped steel.

[0029] Furthermore, the longitudinal reinforcement 3 is made of load-bearing I-beams or steel bars welded into bundles to bear the load.

[0030] Furthermore, the longitudinal reinforcement 3 located at the upper end of the main frame 1 is kept at a certain distance from the top end of the main frame 1 , and the longitudinal reinforcement 3 located at the lower end of the main frame 1 is kept at a certain distance from the lower end of the main frame 1 .

[0031] Further, such as Figure 4 As shown, the top rods at both ends adjacent to the open end are rotatably connected to the sleeve shaft 6, and the top of the ladder 2 is fixed to the sleeve shaft 6. The arrangement of the ladder 2 is convenient for operators to chisel away cement soil and cut H-shaped steel. The ladders 2 on both sides can be retracted to save space during the transportation of the device. When the ladder 2 is erected, a limit rope 5 is set between the ladder 2 and the main frame to ensure the overall stability, the overall shape is triangular, and the structure is reasonable.

[0032] The construction method comprises the following steps:

[0033] 1) Remove the cement soil and chisel out the H-shaped steel;

[0034] 2) Put the H-shaped steel into the main frame 1, and cut it from the upper and lower ends respectively.

[0035] Cutting holes 7 are set at all parts;

[0036] 3) The pin 4 passes through the cutting hole 7 and is fixed on the longitudinal rib 3;

[0037] 4) Use the lifting mechanism to drag the pin 4 to move the H-beam outward.

[0038] Among them, the cutting hole 7 located at the upper end of the H-shaped steel is located 10 to 30 cm below the cutting position, and the cutting hole 7 located at the lower end of the H-shaped steel is located 10 to 30 cm above the cutting position, which is adapted to the position of the longitudinal reinforcement 3 and the pin 4 to ensure that the H-shaped steel is completely framed in the mobile frame.

[0039] Among them, in step 2), the H-shaped steel is put into the main frame body 1, cut from the upper end of the H-shaped steel, and partially cut from the lower end. The H-shaped steel is moved horizontally in the main frame space by knocking until the H-shaped steel is completely out of the original position.

[0040] Among them, the lifting mechanism is a hand winch. After the H-shaped steel is cut, it is first moved horizontally and then vertically. After the hand winch moves the H-shaped steel out of the tunnel, the cut H-shaped steel is lifted out as a whole by a crane.

[0041] The above describes several embodiments of the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A mobile frame for breaking the SMW pile hole door in pipe jacking construction, comprising a main frame body with an inner cavity capable of accommodating H-shaped steel, and a ladder movably connected to both sides of the top of the main frame body, characterized in that: One end of the main frame is open, and the upper and lower ends of both side ends adjacent to the open end are fixedly connected with longitudinal reinforcements, and the two opposite longitudinal reinforcements are movably connected with a transversely arranged pin shaft.

2. The mobile frame for breaking the SMW method pile hole door in pipe jacking construction according to claim 1 is characterized in that: The length of the main frame is 2.5~3 times the length of the H-shaped steel.

3. The mobile frame for breaking the SMW method pile hole door in pipe jacking construction according to claim 2 is characterized in that: The longitudinal reinforcement is made of load-bearing I-beams or steel bars welded into bundles for load-bearing.

4. The mobile frame for breaking the SMW method pile hole door in pipe jacking construction according to claim 3 is characterized by: The longitudinal reinforcement located at the upper end of the main frame is kept at a certain distance from the top end of the main frame, and the longitudinal reinforcement located at the lower end of the main frame is kept at a certain distance from the lower end of the main frame.

5. The mobile frame for breaking the SMW method pile door in pipe jacking construction according to any one of claims 1 to 4, characterized in that: The top rods at the two side ends adjacent to the open end are rotatably connected to the sleeve shafts, and the top end of the ladder is fixedly connected to the sleeve shafts.

6. A construction method for breaking the SMW pile hole door by pipe jacking construction, characterized in that: The method relies on the mobile frame for breaking the SMW method pile hole door in pipe jacking construction as described in any one of claims 1 to 5, and comprises the following steps: 1) Remove the cement soil and chisel out the H-shaped steel; 2) Put the H-shaped steel into the main frame, cut it from the upper and lower ends respectively, and set cutting holes at the cutting parts; 3) The pin passes through the cut hole and is fixed on the longitudinal reinforcement; 4) Use the lifting mechanism to drag the pin to move the H-beam outward.

7. The construction method for breaking the SMW pile hole door by pipe jacking construction according to claim 6 is characterized by: The cutting hole at the upper end of the H-shaped steel is located 10 to 30 cm below the cut-off position, and the cutting hole at the lower end of the H-shaped steel is located 10 to 30 cm above the cut-off position.

8. The construction method for breaking the SMW pile hole door by pipe jacking construction according to claim 7 is characterized by: Step 2) To put the H-beam into the main frame, cut from the upper end of the H-beam, set a cutting hole at the cut-off part, and partially cut the lower end. Move the H-beam horizontally in the main frame space by knocking until the H-beam is completely out of its original position, and then set a cutting hole at the lower end of the H-beam.

9. The construction method for breaking the SMW pile hole door by pipe jacking construction according to any one of claims 6 to 8, characterized in that: The lifting mechanism is a hand chain hoist. After the hand chain hoist moves the H-shaped steel out of the tunnel door, a crane is used to lift the cut H-shaped steel out as a whole.

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