Construction method for pier shaft without internal tie rods and without form removal

Abstract

The present application relates to a construction method for pier shafts of a formwork without internal tie rods and without disassembly, which includes Step 1: splicing formwork components to form a formwork unit, fixing the formwork unit on the outer side wall of the formwork unit using fasteners, and stacking and splicing several formwork units to form a complete formwork; Step 2: excavating a foundation pit at a predetermined position, driving anchor bars into the bottom of the foundation pit and pouring concrete to form a foundation; Step 3: lifting the complete formwork and placing it on the foundation, and then placing a steel reinforcement cage into the complete formwork; Step 4: pouring concrete into the complete formwork until the complete formwork is filled with concrete; Step 5: lifting the complete formwork, and then using a fixing component to vertically place the complete formwork on the ground; Step 6: repeating Steps 2 to 5 at the next construction site. The present application has the effect of reducing the formwork construction process and accelerating the construction progress of piers.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and particularly to a construction method for pier shafts with a formwork without internal tie rods and without formwork removal. Background Art

[0002] When constructing high-speed rail track bridges, formworks are formed by splicing formwork bents. Then, concrete is poured into the formwork bents to form pier shafts. Using formwork bents to form formworks for construction has the advantages of simple construction, clear stress, and cost savings.

[0003] Currently, when constructing the piers of bridges, after sleeving threaded rods in pipes and passing them through two opposite formwork bent components, nuts are tightened on the outer sides of the formwork bent components to pull and lock the two opposite formwork bent components to form a formwork bent unit. Then, several formwork bent units are overlapped to form a formwork. Concrete is poured into the formwork, and after the concrete solidifies, a pier shaft is formed. After pulling out the threaded rods from the pipes, the formwork is removed and transported to the next construction site, and the formwork is reinstalled and the above steps are repeated to construct the next pier shaft.

[0004] Regarding the above related technology, when using formworks with internal tie rods for construction, the entire formwork needs to be disassembled and reassembled and then reused at the next construction site. The process of reusing formworks with internal tie rods is cumbersome, reducing construction efficiency and being unfavorable for completing construction within the scheduled period. Summary of the Invention

[0005] In order to reduce the formwork construction process and speed up the construction progress of piers, this application provides a construction method for pier shafts with a formwork without internal tie rods and without formwork removal.

[0006] A construction method for pier shafts with a formwork without internal tie rods and without formwork removal provided by this application includes:

[0007] Step 1: Splice formwork bent components to form a formwork bent unit, use fasteners to fix the formwork bent unit on the outer side wall of the formwork bent unit, and stack and splice the formwork bent units to form a complete formwork.

[0008] Step 2: Excavate a foundation pit at a predetermined position, drive anchor bars into the bottom of the foundation pit and pour concrete to form a foundation.

[0009] Step 3: Lift the complete formwork and place it into the foundation pit, and then place the steel reinforcement cage into the complete formwork.

[0010] Step 4: Pour concrete into the complete formwork until the complete formwork is filled with concrete.

[0011] Step 5: Lift the complete formwork, and then use a fixing component to vertically place the complete formwork on the ground.

[0012] Step 6: Repeat Steps 2 to 5 at the next construction site.

[0013] By adopting the above technical solution, after the concrete of the current pier body has set, since it is necessary to dig a foundation pit at the next construction site to pour concrete to form a foundation and then place the entire frame in it, the construction workers first lift the entire frame and place it beside the construction site, and then lift the entire frame and place it in the foundation pit after the foundation pit excavation and pile sinking grouting are completed; when placing the entire frame on the ground, due to the large weight and high overall height of the entire frame, it is easy to tip over after placement, resulting in damage to the entire frame. Therefore, when placing the entire frame on the ground, a fixing component is used to stabilize the entire frame and reduce the risk of the entire frame tipping over; through this solution, firstly, the bent frame is hoisted as a whole, and there is no need to disassemble the bent frame into parts and then reinstall it. The construction workers can directly hoist the entire frame to the next construction site and then start construction, reducing the process of assembling the bent frame and accelerating the construction progress; secondly, a bent frame without internal tie rods is used as the pier body formwork. Compared with the bent frame with internal tie rods, there is no need to reserve pipes in the concrete for the threaded rods to pass through, enhancing the structural strength of the pier body.

[0014] Preferably, the fixing component includes a plurality of steel pipe columns, and the plurality of steel pipe columns are arranged vertically at intervals along the circumferential direction on the outer side wall of the entire frame. The steel pipe column includes a fixing part and an insertion part for inserting into the ground. A bearing ring is fixedly installed on the outer side wall of the entire frame. The fixing part passes through and is clamped to the bearing ring. The insertion part is slidably installed in the fixing part. The steel pipe column further includes a locking part for positioning the insertion part on the fixing part;

[0015] The method of using the fixing component to vertically place the entire frame on the ground includes: sliding the insertion part out of the fixing part, then using the locking part to position the insertion part, and then the entire frame.

[0016] By adopting the above technical solution, since the entire frame is placed on a hard foundation and then concrete is poured to form the pier body, if the steel pipe column directly abuts against the hard concrete foundation, it may cause damage to the steel pipe column. Therefore, when pouring the pier body, the insertion part is retracted to reduce the occurrence of damage to the steel pipe column. When placing the entire frame on the soil, the insertion part is extended from the fixing part and the positioning part is used to fix the insertion part, so that the steel pipe column can be inserted into the soil, thereby enabling the entire frame to be stably placed on the ground and reducing the risk of tipping and damage.

[0017] Preferably, a sliding groove is formed in the inner side wall of the fixing part along the vertical direction, and a locking groove extends circumferentially on the side wall of the fixing part at the bottom of the sliding groove; the locking part includes a plurality of locking blocks, and the plurality of locking blocks are fixedly installed at intervals along the circumferential direction on the outer side wall of the insertion part. The locking blocks are slidably installed in the fixing part through the sliding groove;

[0018] The method of positioning the insertion part using the locking part includes: during the process of lifting the entire frame, the insertion part slides out from the fixing part by its own gravity, and then the insertion part is rotated until the locking block slides to the bottom of the locking groove.

[0019] By adopting the above technical solution, since the locking block slides directly in the sliding groove, when pouring concrete into the entire frame during pier construction, the hard concrete foundation can directly jack up the insertion part. When the entire frame is lifted, the insertion part slides out directly under the action of its own gravity. The construction workers only need to rotate the insertion part and turn the locking block into the locking groove to position the insertion part on the fixing part. This positioning method has a simple structure and is easy to operate.

[0020] Preferably, a support rod is provided at the bottom of the fixing part. A first rotation groove is formed in the outer side wall of the fixing part along the extending direction of the steel pipe column. One end of the support rod is hinged to the fixing part through the first rotation groove, and the other end is a free end; a limiting component for restricting the position of the support rod in the fixing part is further installed on the steel pipe column;

[0021] The method of vertically placing the entire frame on the ground using the fixing component further includes: after the insertion part extends out of the fixing part, the limiting of the support rod by the limiting component is released until the support rod tilts downward after flipping; then the entire frame is lowered continuously.

[0022] By adopting the above technical solution, a support rod is provided on the fixing part, which enhances the bearing capacity and structural stability of the steel pipe column; at the same time, since the length of the support rod is greater than the length from the hinge of the fixing part to the ground, if the support rod rotates freely, it will cause the support rod to collide vertically with the ground when lowering the entire frame, thus damaging the support rod. Therefore, after the support rod is flipped, the limiting component is used to lock the support rod. When the entire frame is placed on the ground, the locking of the support rod by the limiting component is released, so that the support rod abuts against the ground, enhancing the bearing capacity of the steel pipe column.

[0023] Preferably, opposite sliding holes are formed in the outer side wall of the insertion part along the horizontal direction. A pair of insertion rods are slidably installed in the two sliding holes of the insertion part. A rotating rod is rotatably installed in each steel pipe column. The rotating rod is vertically arranged, and the lower end of the rotating rod abuts against the insertion part. A driving block is sleeved on the rotating rod. Guide surfaces are provided at one ends of the two insertion rods close to the rotating rod. The cross-section of the driving block is elliptical, and the two far points of the driving block respectively abut against the guide surfaces on the two insertion rods; a positioning component for positioning the rotated rotating rod is installed on the steel pipe column; a resetting component for resetting the insertion rods into the steel pipe column is further installed on the steel pipe column;

[0024] The method of vertically placing the entire frame on the ground using the fixing components further includes: after inserting the steel pipe column into the soil, rotating the rotating rod to drive the inserting rod to slide away from the rotating rod until the two inserting rods are inserted into the soil, and then using the positioning member to position the rotating rod.

[0025] By adopting the above technical solution, when placing the entire frame on the ground, the insertion part is inserted into the ground. The construction worker rotates the rotating rod, and the driving blocks on the rotating rod rotate with the rotating rod. The two far points of the driving block gradually abut against the two inserting rods respectively, thereby pushing the two inserting rods to slide away from the rotating rod and extend out of the insertion part and insert into the soil body. Then, use the positioning member to fix the rotating rod to reduce the situation that the inserting rod resets due to the rotation of the rotating rod; position the insertion part in the soil body, improve the anti-pulling force of the insertion part, and thus enhance the stability of the entire frame placed on the ground; when continuing to rotate the rotating rod, the convex part of the driving block no longer abuts against the inserting rod, and the inserting rod resets under the action of the reset member.

[0026] Preferably, the positioning member includes a positioning rod, and the positioning rod passes through the rotating rod and the fixing part at the same time:

[0027] The specific method of positioning the rotating rod using the positioning member includes: directly inserting the positioning rod into the fixing part after rotating the rotating rod.

[0028] By adopting the above technical solution, the construction worker only needs to insert the positioning rod to complete the positioning of the rotating rod. This positioning method is simple to operate and easy to implement.

[0029] Preferably, the reset member includes an elastic member. The elastic member is sleeved on the section of the inserting rod located inside the steel pipe column. One end of the elastic member is installed at the orifice of the sliding hole close to the rotating rod, and the other end is installed at one end of the inserting rod close to the rotating rod;

[0030] The construction method after step six includes: after releasing the positioning of the rotating rod by the positioning member, rotating the rotating rod until the two far points of the driving block no longer abut against the inserting rod, and the inserting rod resets under the action of the elastic member.

[0031] By adopting the above technical solution, the construction worker rotates the rotating rod to drive the driving block to rotate. The two far points of the driving block respectively abut against the two inserting rods, pushing the inserting rods out of the insertion part and deforming the elastic member; when it is necessary to lift the entire frame from the ground, the rotating rod rotates. When the far point of the driving block no longer abuts against the inserting rod, the elastic member returns to its original shape, driving the inserting rod to move towards the rotating rod and retracting into the insertion part, thereby completing the reset. At this time, the entire frame can be lifted from the ground.

[0032] Preferably, gears are provided at the tops of the respective rotating rods. The gears are sleeved on the rotating rods, and a transmission chain is provided on the gears. The transmission chain is sequentially wound around the gears on the respective rotating shafts, and the transmission chain meshes with each of the gears;

[0033] The construction method of rotating the rotating rod to drive the insertion rod to slide in a direction away from the rotating rod includes: rotating one of the rotating rods, driving the rotation of the remaining rotating rods until the insertion rods on each of the rotating rods extend into the soil.

[0034] By adopting the above technical solution, gears are sleeved on the respective rotating rods and a chain is used to mesh with each gear, so that when one of the rotating rods is rotated, the remaining rotating rods can be rotated synchronously. Through the driving blocks on the rotating rods, the insertion rods on each steel pipe column can slide out of the insertion part synchronously, thereby positioning the insertion part. This solution only requires rotating one of the rotating rods to make the other rotating rods rotate synchronously, reducing the operation of construction workers and accelerating the construction speed.

[0035] The limiting component includes a first sliding rod, a second sliding rod, a first airbag and a second airbag. The fixing part is provided with a first sliding groove on the side wall of the first rotating groove perpendicular to the rotating plane of the support rod. The first sliding rod is slidably installed on the fixing part through the first sliding groove, and the first airbag is located at the bottom of the first sliding groove; the fixing part is provided with a second rotating groove on the side wall of the first rotating groove parallel to the rotating plane of the support rod. The fixing part extends second sliding grooves at both ends in the horizontal direction at the bottom of the second rotating groove. The second sliding rod is slidably inserted into the fixing part through the second sliding grooves and extends into the fixing part. A rotating rod is hinged on the second sliding rod. The rotating rod passes through the fixing part through the second rotating groove. The second airbag is located at the bottom of the second sliding groove. The first airbag and the second airbag are connected to each other through an air pipe; a driving ring is sleeved on the rotating rod. The driving ring is slidably installed in the fixing part. The outer ring of the driving ring abuts against one end of the second sliding rod close to the rotating rod. A guiding surface is provided on the lower side of the driving ring. When the insertion part jacks up the rotating rod, the height of the driving ring is higher than the height where the second sliding rod is located;

[0036] The specific method for releasing the limit of the limiting component on the support rod includes: lifting the entire frame until the rotating rod completely drops.

[0037] By adopting the above technical scheme, when the whole frame is used to construct the pier body, the support rod is flipped so that the support rod abuts against the first sliding rod, the first sliding rod squeezes the first air bag so that the gas is transmitted to the second air bag through the air pipe, thereby pushing the second sliding rod to slide, so that the rotating rod hinged to the second sliding rod rotates and passes through the second rotating groove to abut against the side of the support rod, and the support rod is locked in the first rotating groove, thereby reducing the situation where the support rod falls and hits the foundation during construction; when the whole frame is hoisted, the sliding part slides automatically, and the rotating rod moves downward at the same time, thereby driving the driving ring to slide downward and driving the second sliding rod to slide away from the rotating rod through the guide surface, and the rotating rod abuts against the side wall of the second rotating groove with the movement of the second sliding rod, thereby rotating, no longer abutting against the support rod, and releasing the limit on the support rod; at the same time, the second air bag is squeezed so that the gas is transmitted to the first air bag through the air pipe, pushing the first sliding rod to push the support rod out; thereby, the support rod rotates downward, and when the whole frame is placed on the ground, the support rod abuts against the ground, thereby strengthening the structural strength of the steel pipe column.

[0038] Preferably, the method of lifting the entire frame and placing it on the foundation further includes: first rotating the insertion portion until the rotating rod is lifted up, and then flipping the support rod and placing it into the first rotating groove.

[0039] By adopting the above technical solution, the insertion part is first rotated to lift the entire frame onto the foundation, and then the insertion part is lifted up, thereby lifting the rotating rod. At this time, the driving ring is located above the second sliding rod. When the entire frame is lifted and placed on the ground, the insertion part slides on the fixed part by its own gravity, and the rotating rod moves downward together to cause the driving ring to move downward. During the falling process of the driving ring, the second sliding rod is pushed into the second sliding groove through the guide surface, thereby completing the unlocking of the support rod, so that the support rod can be against the ground before the entire frame is placed on the ground. This unlocking method can be completed by relying solely on the falling of the rotating rod.

[0040] In summary, the present application includes at least one of the following beneficial effects:

[0041] 1. After the concrete of the current pier body solidifies, it is necessary to dig a foundation pit at the next construction site and pour concrete to form a foundation before placing the whole frame. The construction workers first hoist the whole frame and place it next to the construction site. After the foundation pit excavation and pile grouting are completed, the whole frame is hoisted and placed in the foundation pit; when the whole frame is placed on the ground, because the whole frame is heavy and the overall height is high, it is easy to tip over after placement, resulting in damage to the whole frame. Therefore, when the whole frame is placed on the ground, a fixed component is used to stabilize the whole frame to reduce the risk of tipping over; through this solution, first, the frame is hoisted as a whole, and there is no need to dismantle the frame into parts and then reinstall it. The construction workers can directly hoist the whole frame to the next construction site for construction, which reduces the process of assembling the frame and speeds up the construction progress; second, the frame without inner tie rods is used as the pier body template. Compared with the frame with inner tie rods, it is no longer necessary to reserve pipes in the concrete for the threaded rods to pass through, which enhances the structural strength of the pier body.

[0042] 2. When the entire frame is placed on the ground, the insertion part is inserted into the ground. The construction worker rotates the rotating rod, and the driving block on the rotating rod rotates along with the rotating rod. The two far points of the driving block gradually abut against the two inserting rods respectively, thereby pushing the two inserting rods to slide away from the rotating rod direction, extending out of the insertion part and inserting into the soil. Then, use the positioning part to fix the rotating rod to reduce the situation that the inserting rod resets due to the rotation of the rotating rod; position the insertion part in the soil, improve the uplift resistance of the insertion part, and thus enhance the stability of the entire frame placed on the ground; when the rotating rod is continuously rotated, the convex part of the driving block no longer abuts against the inserting rod, and the inserting rod resets under the action of the reset part.

[0043] 3. When using the entire frame to construct the pier body, flip the support rod so that the support rod abuts against the first sliding rod. The first sliding rod squeezes the first airbag to make the gas transmit through the air pipe to the second airbag, thereby pushing the second sliding rod to slide. The rotating rod hinged to the second sliding rod rotates and passes through the second rotating groove to abut against the side surface of the support rod, locking the support rod in the first rotating groove to reduce the situation that the support rod drops during construction and impacts the foundation; when lifting the entire frame, the sliding part automatically slides, and the rotating rod moves downward at the same time, thereby driving the driving ring to slide downward and driving the second sliding rod to slide away from the rotating rod direction through the guiding surface. The rotating rod rotates along with the movement of the second sliding rod and abuts against the side wall of the second rotating groove, no longer abutting against the support rod, releasing the limit on the support rod; at the same time, squeeze the second airbag to make the gas transmit through the air pipe to the first airbag to push the first sliding rod to eject the support rod; thus, the support rod rotates downward, and when the entire frame is placed on the ground, the support rod abuts against the ground to strengthen the structural strength of the steel pipe column. Description of the Drawings

[0044] Figure 1 is the flow chart of the construction method of the pier body of a formwork without internal tie rods and without disassembly.

[0045] Figure 2 is the overall frame structure diagram of the construction method of the pier body of a formwork without internal tie rods and without disassembly according to the embodiment of the present application.

[0046] Figure 3 is the overall frame sectional view of the construction method of the pier body of a formwork without internal tie rods and without disassembly according to the embodiment of the present application.

[0047] Figure 4 is the upward view sectional view of the steel pipe column of the construction method of the pier body of a formwork without internal tie rods and without disassembly according to the embodiment of the present application Figure 1 .

[0048] Figure 5 is the upward view sectional view of the steel pipe column of the construction method of the pier body of a formwork without internal tie rods and without disassembly according to the embodiment of the present application Figure 2 .

[0049] Figure 6It is the upward view sectional view of the steel pipe column of the pier construction method of the formwork without internal tie rods and without disassembly Figure 3 .

[0050] Figure 7 Is Figure 3 The enlarged view of A in

[0051] Figure 8 It is the upward view sectional view of the steel pipe column of the pier construction method of the formwork without internal tie rods and without disassembly Figure 4 .

[0052] Figure 9 Is Figure 8 The enlarged view of B in

[0053] Explanation of reference signs:

[0054] 1, formwork monomer; 101, whole formwork; 11, fastener; 2, fixing component; 21, steel pipe column; 211, fixing part; 212, insertion part; 214, sliding groove; 215, locking groove; 216, first rotation groove; 217, fixing ring; 22, support rod; 23, locking part; 231, locking block; 24, sliding hole; 25, inserting rod; 26, rotating rod; 261, driving block; 262, driving ring; 27, positioning part; 271, positioning rod; 28, reset key; 281, elastic part; 29, gear; 291, transmission chain; 3, limiting component; 31, first sliding rod; 311, first sliding groove; 32, second sliding rod; 321, second sliding groove; 33, first airbag; 34, second airbag; 35, rotating rod; 351, second rotation groove. Detailed implementation mode

[0055] The following further elaborates on this application with reference to the accompanying drawings.

[0056] The embodiment of this application discloses a pier construction method of a formwork without internal tie rods and without disassembly. Refer to Figure 1 And Figure 2 , the pier construction method of the formwork without internal tie rods and without disassembly includes:

[0057] S10: Construction workers assemble the formwork components to form the formwork monomer 1, fix the formwork monomer 1 on the outer side wall of the formwork monomer 1 using the fastener 11, stack multiple formwork monomers 1 on top of each other and then lock and assemble them with screws to form the whole formwork 101.

[0058] Among them, the fastener 11 can be a threaded rod or a steel hoop. In this embodiment, the fastener 11 is a threaded rod. Corresponding bases are provided outside the components of the formwork monomer 1. The threaded rod passes through the bases of the components of two formwork monomers 1 at the same time, and then tightened with nuts to fix the formwork monomer 1.

[0059] S20: Construction workers first use an excavator to dig a foundation pit at a predetermined position, and then drive anchor bars into the foundation pit and pour concrete to form a foundation.

[0060] S30: Use a crane to lift the entire frame 101 and place it on the foundation, and then place the steel reinforcement cage into the entire frame 101.

[0061] S40: Construction workers use a slurry pipeline to pour concrete into the entire frame 101, and vibrate while pouring to reduce the air bubbles in the concrete until the entire frame 101 is filled with concrete.

[0062] S50: After the concrete solidifies, lift the entire frame 101, and then use the fixing component 2 to vertically place the entire frame 101 on the ground.

[0063] S60: Repeat S20 to S50 at the next construction site to build the pier shaft.

[0064] Refer to Figure 2 and Figure 3 As shown in

[0065] Refer to Figure 4 As shown in

[0066] Refer to Figure 2 and Figure 3, a first rotation groove 216 is formed on the outer side wall of the bottom of the fixing part 211. A support rod 22 is rotatably installed in the first rotation groove 216 of the fixing part 211; one end of the support rod 22 is hinged to the fixing part 211 and the other end is a free end. A limiting component 3 for restricting the support rod 22 within the first rotation groove 216 is installed on the fixing part 211. When the entire frame 101 is used for pier construction, the support rod 22 is positioned on the fixing part 211 through the limiting component 3, reducing the damage of the support rod 22 after colliding with the foundation.

[0067] Refer to Figure 3 and Figure 5 , two opposite sliding holes 24 are formed in the outer side wall of the insertion part 212 in the horizontal direction. Plug rods 25 are slidably installed in the two sliding holes 24 of the insertion part 212 respectively. A rotating rod 26 is rotatably installed in each steel pipe column 21, and the axis of the rotating rod 26 coincides with the axis of the steel pipe column 21; a fixing ring 217 is arranged in the steel pipe column 21. One end of the rotating rod 26 abuts against the insertion part 212 and the other end passes through and is slidably installed in the fixing ring 217. The rotating rod 26 extends in the vertically upward direction. Guide surfaces are arranged at one ends of the two plug rods 25 close to the rotating rod 26. A driving block 261 is sleeved on the rotating rod 26. The cross-section of the driving block 261 is oval. Two far points of the driving block 261 respectively abut against the guide surfaces on the two plug rods 25; A positioning member 27 for positioning the rotated rotating rod 26 is installed on the steel pipe column 21. The positioning member 27 includes a positioning rod 271. The positioning rod 271 passes through the fixing part 211 and the rotating rod 26 at the same time. Lock the rotating rod 26 to drive the driving block 261 to rotate until the two far points of the driving block 261 respectively abut against the two plug rods 25, and push the plug rods 25 out of the insertion part 212 and into the soil; thereby fixing the insertion part 212 in the soil. A reset member for resetting the plug rods 25 into the insertion part 212 is also installed on the steel pipe column 21.

[0068] Refer to Figure 4 , the reset member includes an elastic member 281. In this embodiment, the elastic member 281 is a spring. The elastic member 281 is sleeved on the plug rod 25. One end of the elastic member 281 is fixedly installed at the orifice of the sliding hole 24 close to the rotating rod 26, and the other end is fixedly installed at one end of the plug rod 25 close to the rotating rod 26. Through the elastic member 281, when the convex part of the driving block 261 no longer abuts against the plug rod 25, the elastic member 281 drives the plug rod 25 to move towards the rotating rod 26 and retracts into the insertion part 212.

[0069] Refer to Figure 2, a gear 29 is sleeved on the top of each rotating rod 26. A transmission chain 291 is arranged on the rotating rod 26. The transmission chains 291 are wound around the gears 29 on each rotating rod 26, and the transmission chains 291 are meshed with each gear 29. When one of the rotating rods 26 is rotated, the other rotating rods 26 are synchronously rotated through the linkage of the gear 29 and the transmission chain 291. By only rotating one of the rotating rods 26, the other rotating rods 26 can be rotated so that the insertion rods 25 in each steel pipe column 21 are inserted into the soil, and the insertion part 212 is fixed in the soil, thereby improving the overall uplift resistance of the steel pipe column 21 and reducing the risk of the entire frame 101 tipping over.

[0070] In step S50, the specific method of using the fixing component 2 to vertically place the entire frame 101 on the ground further includes:

[0071] S51: The construction worker hoists the entire frame 101. When hoisting and lowering the entire frame 101, the bottom surface of the entire frame 101 is always parallel to the ground. Rotate the insertion part 212 so that the locking block 231 slides from the bottom of the sliding groove 214 to the bottom of the locking groove 215, and position the insertion part 212 outside the fixing part 211. When lowering the entire frame 101, the insertion part 212 is inserted into the ground so that the entire frame 101 is stably placed on the ground; at the same time, release the limit of the support rod 22 by the limit component 3, and make the support rod 22 tilt and abut against the ground, strengthening the bearing capacity and structural stability of the fixing component 2. After the insertion part 212 is inserted into the ground, the construction worker drives the rotating rod 26 to rotate, and drives the other rotating rods 26 to rotate through the linkage of the gear 29 and the transmission chain 291; the rotating rod 26 drives the driving block 261 to rotate, so that the two far points of the driving block 261 respectively abut against the two insertion rods 25, and drive the insertion rods 25 to eject from the insertion part 212 and insert into the soil. Then, simultaneously pass the positioning rod 271 through the rotating rod 26 and the fixing part 211 to fix the rotated rotating rod 26, so that the insertion rod 25 is always inserted in the soil, position the insertion part 212 in the soil, enhance the uplift resistance of the insertion part 212, and thus improve the stability of the entire frame 101 placed on the ground.

[0072] The limit component 3 includes a first sliding rod 31, a second sliding rod 32, a first airbag 33 and a second airbag 34. Refer to Figure 6 and Figure 7 , a first sliding groove 311 is opened on the side wall of the first rotating groove 216 of the fixing part 211 perpendicular to the rotating plane of the diagonal brace. The first sliding rod 31 is slidably installed on the fixing part 211 through the first sliding groove 311, and the first airbag 33 is located at the bottom of the first sliding groove 311;

[0073] Refer to Figure 7 and Figure 8, on the side wall of the first rotation groove 216 where the fixing part 211 is parallel to the rotation plane of the diagonal brace, a second rotation groove 351 is provided. At both ends of the bottom of the second rotation groove 351 in the horizontal direction, the fixing part 211 extends with second sliding grooves 321. The second sliding rod 32 is slidably inserted into the fixing part 211 through the second sliding grooves 321 and extends into the fixing part 211. A rotating rod 35 is hinged on the second sliding rod 32. The rotating rod 35 is inserted into the fixing part 211 through the second rotation groove 351. The second airbag 34 is located at the bottom of the second sliding groove 321. The first airbag 33 and the second airbag 34 are not on the same horizontal plane. The first airbag 33 and the second airbag 34 are connected to each other through an air pipe.

[0074] Refer to Figure 9 , a driving ring 262 is sleeved on the rotating rod 26. The driving ring 262 is slidably installed in the fixing part 211. The outer ring of the driving ring 262 abuts against one end of the second sliding rod 32 close to the rotating rod 26. A guiding surface is provided on the lower side of the driving ring 262. When the insertion part 212 jacks up the rotating rod 26, the height of the driving ring 262 is higher than the height where the second sliding rod 32 is located.

[0075] In S51, the specific method for releasing the limit of the limiting component 3 on the support rod 22 includes: when the rotating rod 26 moves downward along the vertical direction with the insertion part 212, the driving ring 262 abuts against the second sliding rod 32, and under the action of the guiding surface, the second sliding rod 32 is driven to move away from the rotating rod 26, driving one end of the rotating rod 35 hinged to the second sliding rod 32 to slide, and making the rotating rod 35 abut against the groove wall of the second rotation groove 351, retracting the rotating rod 35 into the second sliding groove 321. At the same time, the second sliding rod 32 squeezes the second airbag 34, and the gas is transported to the first airbag 33 through the air pipe to make the first airbag 33 expand, and the first sliding rod 31 pops out to jack up the support rod 22.

[0076] The construction method after S60 further includes: first rotating the insertion part 212 to make the locking block 231 slide out of the locking groove 215, then lifting the entire frame 101, hoisting it above the foundation, and during the falling process, first flipping the support rod 22 until the rotating rod 26 in the steel pipe column 21 is jacked up, and then putting the support rod 22 into the first rotation groove 216.

[0077] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A construction method for pier shafts of a formwork without internal tie rods and without dismantling, characterized in that, The construction method includes: Step 1: Assemble the bent components to form a bent monomer (1), fix the bent monomer (1) on the outer sidewall of the bent monomer (1) using fasteners (11), and stack and assemble a number of bent monomers (1) to form an entire frame (101); Step 2: Excavate a foundation pit at a predetermined position, drive anchor bars into the bottom of the foundation pit and pour concrete to form a foundation; Step 3: Lift the entire frame (101) and place it on the foundation, and then place the steel reinforcement cage into the entire frame (101); Step 4: Pour concrete into the entire frame (101) until the entire frame (101) is filled with concrete; Step 5: Lift the entire frame (101), and then use the fixing assembly (2) to vertically place the entire frame (101) on the ground; Step 6: Repeat Steps 2 to 5 at the next construction site; The fixing assembly (2) includes a number of steel pipe columns (21). The number of the steel pipe columns (21) is arranged at intervals in the circumferential direction and vertically on the outer sidewall of the entire frame (101). The steel pipe column (21) includes a fixing part (211) and an insertion part (212) for inserting into the ground. A bearing ring is fixedly installed on the outer sidewall of the entire frame (101). The fixing part (211) passes through and is clamped to the bearing ring. The insertion part (212) is slidably installed in the fixing part (211). The steel pipe column (21) further includes a locking member (23) for positioning the insertion part (212) on the fixing part (211); The method of using the fixing assembly (2) to vertically place the entire frame (101) on the ground includes: sliding the insertion part (212) out of the fixing part (211), then using the locking member (23) to position the insertion part (212), and then completely lowering the entire frame (101); A sliding groove (214) is opened in the inner sidewall of the fixing part (211) in the vertical direction, and a locking groove (215) extends circumferentially on the sidewall of the fixing part (211) at the bottom of the sliding groove (214); the locking member (23) includes a number of locking blocks (231). The number of the locking blocks (231) is fixedly installed at intervals in the circumferential direction on the outer sidewall of the insertion part (212). The locking block (231) is slidably installed in the fixing part (211) through the sliding groove (214); The method of using the locking member (23) to position the insertion part (212) includes: during the process of lifting the entire frame (101), the insertion part (212) slides out of the fixing part (211) by its own gravity, and then rotate the insertion part (212) until the locking block (231) slides to the bottom of the locking groove (215); A support rod (22) is provided at the bottom of the fixing part (211). A first rotating groove (216) is formed in the outer side wall of the fixing part (211) along the extending direction of the steel pipe column (21). One end of the support rod (22) is hinged to the fixing part (211) through the first rotating groove (216), and the other end is a free end. The steel pipe column (21) is further provided with a limiting component (3) for limiting the position of the support rod (22) within the fixing part (211). The method of using the fixing component (2) to vertically place the whole frame (101) on the ground further includes: after the insertion part (212) extends out of the fixing part (211), releasing the limitation of the limiting component (3) on the support rod (22) until the support rod (22) tilts downward after flipping; then continuing to lower the whole frame (101).

2. The construction method of the pier body of a formwork without internal tie rods and without dismantling, according to claim 1, is characterized in that, Sliding holes (24) are formed in the outer side wall of the insertion part (212) in the horizontal direction. A pair of inserting rods (25) are slidably installed in the two sliding holes (24) of the insertion part (212). A rotating rod (26) is rotatably installed in each steel pipe column (21). The rotating rod (26) is vertically arranged, and the lower end of the rotating rod (26) abuts against the insertion part (212). A driving block (261) is sleeved on the rotating rod (26). The cross section of the driving block (261) is oval, and the two far points of the driving block (261) respectively abut against one end of the two inserting rods (25) close to the rotating rod (26). The steel pipe column (21) is provided with a positioning part (27) for positioning the rotated rotating rod (26). The steel pipe column (21) is further provided with a reset part for resetting the inserting rod (25) into the steel pipe column (21). The method of using the fixing component (2) to vertically place the whole frame (101) on the ground further includes: after inserting the steel pipe column (21) into the soil, rotating the rotating rod (26) to drive the inserting rod (25) to slide away from the rotating rod (26) until the inserting rod (25) is inserted into the soil, and then using the positioning part (27) to position the rotating rod (26).

3. The construction method of pier body of a formwork without internal tie rods and without dismantling for the pier according to claim 2, characterized in that, The positioning part (27) includes a positioning rod (271), and the positioning rod (271) passes through the rotating rod (26) and the fixing part (211) at the same time: The specific method of using the positioning part (27) to position the rotating rod (26) includes: directly inserting the positioning rod (271) into the fixing part (211) after the rotating rod (26) rotates.

4. The construction method of pier body of a formwork without internal tie rods and without dismantling, according to claim 2, is characterized in that, The reset part includes an elastic part (281). The elastic part (281) is sleeved on the section of the inserting rod (25) located within the steel pipe column (21). One end of the elastic part (281) is installed at the orifice of the sliding hole (24) close to the rotating rod (26), and the other end is installed at one end of the inserting rod (25) close to the rotating rod (26). The construction method after the sixth step includes: after releasing the positioning of the rotating rod (26) by the positioning member (27), rotating the rotating rod (26) until the two far points of the driving block (261) no longer abut against the insertion rod (25), and the insertion rod (25) is reset under the action of the elastic member (281).

5. The construction method of pier body for a formwork without internal tie rods and without dismantling, according to claim 4, is characterized in that A gear (29) is provided at the top of each rotating rod (26). The gear (29) is sleeved on the rotating rod (26). A transmission chain (291) is provided on the gear (29). The transmission chain (291) is sequentially wound around the gears (29) on each rotating shaft, and the transmission chain (291) meshes with each gear (29). The construction method of rotating the rotating rod (26) to drive the insertion rod (25) to slide away from the rotating rod (26) includes: rotating one of the rotating rods (26) to drive the other rotating rods (26) to rotate until the insertion rods (25) on each rotating rod (26) penetrate into the soil.

6. The construction method of pier body for a formwork without internal tie rods and without dismantling, according to claim 5, is characterized in that The limiting component (3) includes a first sliding rod (31), a second sliding rod (32), a first airbag (33) and a second airbag (34). The fixing part (211) is provided with a first sliding groove (311) on the side wall of the first rotating groove (216) perpendicular to the rotating plane of the support rod (22). The first sliding rod (31) is slidably installed on the fixing part (211) through the first sliding groove (311), and the first airbag (33) is located at the bottom of the first sliding groove (311). The fixing part (211) is provided with a second rotating groove (351) on the side wall of the first rotating groove (216) parallel to the rotating plane of the support rod (22). The fixing part (211) extends with second sliding grooves (321) at both ends along the horizontal direction at the bottom of the second rotating groove (351). The second sliding rod (32) is slidably inserted into the fixing part (211) through the second sliding grooves (321) and extends into the fixing part (211). A rotating rod (35) is hinged on the second sliding rod (32). The rotating rod (35) passes through the fixing part (211) through the second rotating groove (351). The second airbag (34) is located at the bottom of the second sliding groove (321). The first airbag (33) and the second airbag (34) are connected to each other through an air pipe. A driving ring (262) is sleeved on the rotating rod (26). The driving ring (262) is slidably installed in the fixing part (211). The outer ring of the driving ring (262) abuts against one end of the second sliding rod (32) close to the rotating rod (26). When the insertion part (212) jacks up the rotating rod (26), the height of the driving ring (262) is higher than the height where the second sliding rod (32) is located. The specific method for releasing the limit of the limiting component (3) on the support rod (22) includes: hoisting the whole frame (101) until the rotating rod (26) completely falls.

7. A construction method for pier shafts of a formwork without internal tie rods and without form removal, according to claim 6, characterized in that, The method of lifting the entire frame (101) and placing it on the foundation further includes: first rotating the insertion portion (212) until the rotating rod (26) is lifted, and then flipping the support rod (22) and placing it into the first rotating groove (216).

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