Concrete inner support free-support dismantling device and dismantling method

Abstract

The application discloses a concrete inner support free-support dismantling device and method, which comprises a support main beam dismantling assembly for dismantling a support main beam and a support secondary beam dismantling assembly for dismantling a support secondary beam; the support secondary beam dismantling assembly comprises a hitching mechanism and a lifting ring, the hitching mechanism is hitched between adjacent to-be-dismantled support secondary beam sections and non-dismantled support secondary beam sections, and a plurality of lifting rings are pre-buried on the support secondary beam and arranged on each to-be-dismantled support secondary beam section; the support main beam dismantling assembly comprises a cantilever mechanism and a lifting ring, both ends of the cantilever mechanism are fixed on both ends of a to-be-dismantled support main beam section, and both ends of the cantilever mechanism are overlapped on non-dismantled support main beam sections at both ends of the to-be-dismantled support main beam section; a plurality of lifting rings are pre-buried on the support main beam and arranged on each to-be-dismantled support main beam section. The application relates to the technical field of foundation pit construction and can solve the problems of large engineering quantity, low efficiency and hidden safety hazards in the high-altitude dismantling of concrete inner supports in an ultra-deep foundation pit in the prior art.

Description

Technical Field

[0001] This invention relates to the field of foundation pit construction technology, and in particular to a concrete internal bracing removal device and removal method that do not require support. Background Technology

[0002] When anchoring the diaphragm wall is not possible due to other constraints during ultra-deep foundation pit construction, internal bracing is often used for diaphragm wall support. When the soil pressure inside the foundation pit is high, steel internal bracing generally cannot meet the stress requirements, and concrete internal bracing is required. However, the dismantling of concrete internal bracing involves a large amount of work and is slow, especially when dismantling at heights, where the erection of the operating scaffold is difficult and the use is dangerous.

[0003] Traditional methods for dismantling concrete internal supports typically involve erecting temporary steel pipe scaffolding under the supports. This method requires a full-span scaffolding setup, which is labor-intensive and inefficient. Furthermore, gaps inevitably exist between the working platform and the bottom of the internal supports. When the concrete internal support beam is cut, it falls directly onto the scaffolding, potentially causing impact and compromising its safety. Therefore, a supportless dismantling device and method for concrete internal supports are needed to address the problems of large workload, low efficiency, and safety hazards associated with high-altitude dismantling of concrete internal supports in ultra-deep foundation pits. Summary of the Invention

[0004] The purpose of this invention is to provide a supportless dismantling device and method for concrete internal supports, which can solve the problems of large workload, low efficiency and safety hazards in the high-altitude dismantling of concrete internal supports in ultra-deep foundation pits in the prior art.

[0005] This invention is implemented as follows:

[0006] A concrete internal bracing removal device includes a main beam removal assembly for removing the main supporting beam and a secondary beam removal assembly for removing the secondary supporting beams. The secondary beam removal assembly includes a tying mechanism and lifting rings. The tying mechanism is connected between adjacent secondary beam segments to be removed and those not yet removed. Several lifting rings are pre-embedded at intervals in the secondary supporting beams, and each secondary beam segment to be removed is equipped with a lifting ring. The main beam removal assembly includes a cantilever mechanism and lifting rings. Both ends of the cantilever mechanism are fixed to both ends of the main beam segment to be removed, and both ends of the cantilever mechanism overlap the remaining main beam segments at both ends of the main beam segment to be removed. Several lifting rings are pre-embedded at intervals in the main supporting beam, and each main beam segment to be removed is equipped with a lifting ring.

[0007] The tie mechanism includes a tie rope; the secondary support beam has pre-drilled holes at intervals, and each section of the secondary support beam to be removed has pre-drilled holes at both ends. The section of the secondary support beam to be removed and its adjacent section of the secondary support beam not removed are connected by the tie rope through the two pre-drilled holes, so that the adjacent section of the secondary support beam to be removed and the section of the secondary support beam not removed are connected and fixed.

[0008] The tie rope is equipped with a safety buckle, which abuts against the beam surface located at both ends of the reserved hole. That is, the four safety buckles abut against the two sides of the secondary beam section to be removed and the secondary beam section not removed.

[0009] The cantilever mechanism includes U-bolts, pressure plates, and through bars; a pair of U-bolts are respectively arranged around the bottom and sides of both ends of the main beam section to be dismantled, and the openings of each U-bolt pass through the pressure plate and are locked with nuts; the two ends of the through bars are respectively inserted between the two pressure plates and the top surfaces of the two ends of the main beam section to be dismantled, and the two ends of the through bars rest on the two adjacent sections of the main beam section to be dismantled that have not been dismantled.

[0010] The through bar is set along the central axis of the supporting main beam. Fastening blocks are provided between the two sides of the through bar and the two ends of the opening of the U-bolt. The pressure plate presses on the top surface of the through bar and the fastening blocks.

[0011] A method for removing a secondary beam supported by a concrete internal bracing device includes the following steps:

[0012] Step 1: Tie the tie mechanism between the end of the secondary beam section to be removed and the adjacent secondary beam section that has not been removed, so that the two ends of the secondary beam section to be removed are tied and fixed to the secondary beam sections that have not been removed at both ends through a pair of tie structures;

[0013] Step 2: Cut both ends of the secondary beam segment to be removed, so that the secondary beam segment to be removed is disconnected from the secondary beam segments that have not been removed at both ends; at this time, the two secondary beam segments that have not been removed bear the weight of the secondary beam segment to be removed through a pair of tie components.

[0014] Step 3: The hoisting equipment is connected to the secondary beam section to be dismantled via slings and lugs. At this time, the weight of the secondary beam section to be dismantled is borne by the secondary beam section that has not been dismantled and the hoisting equipment.

[0015] Step 4: Remove a pair of tie mechanisms. At this time, the weight of the secondary beam section to be removed is supported by the hoisting equipment, which lifts the secondary beam section to be removed out of the foundation pit.

[0016] Step 1 includes the following sub-steps:

[0017] Step 1.1: The tie rope is threaded through the reserved hole at the end of the secondary beam section to be removed and the reserved hole in the adjacent secondary beam section that has not been removed;

[0018] Step 1.2: Set safety buckles on the tie rope so that the four safety buckles abut against the two sides of the secondary beam section to be removed and the secondary beam section not removed;

[0019] Step 1.3: Connect the ropes into a ring structure so that one end of the secondary beam segment to be removed is connected to the adjacent secondary beam segment that has not been removed;

[0020] Step 1.4: Repeat steps 1.1-1.3 to connect both ends of the secondary beam segment to be removed with the two adjacent secondary beam segments that have not been removed.

[0021] A method for dismantling a main beam supported by a concrete internal bracing-free dismantling device includes the following steps:

[0022] Step A: Fix the cantilever mechanism at both ends of the main beam section to be dismantled, and place the two ends of the cantilever mechanism on the two adjacent sections of the main beam section that have not been dismantled.

[0023] Step B: Cut both ends of the main beam segment to be removed, so that the main beam segment to be removed is disconnected from the main beam segments to be removed at both ends; at this time, the two main beam segments to be removed bear the weight of the main beam segment to be removed through the cantilever mechanism.

[0024] Step C: The hoisting equipment is connected to the main beam section to be dismantled via slings and lugs. At this time, the weight of the main beam section to be dismantled is borne by the main beam section that has not been dismantled and the hoisting equipment.

[0025] Step D: Dismantle the cantilever mechanism. At this time, the weight of the main beam section to be dismantled is supported by the hoisting equipment, which lifts the main beam section to be dismantled out of the foundation pit.

[0026] Step A further includes the following sub-steps:

[0027] Step A.1: Wrap U-bolts around the bottom and both sides of the end of the main beam section to be removed;

[0028] Step A.2: Screw the nuts through the pressure plate at both ends of the U-bolt's opening;

[0029] Step A.3: Repeat steps A.1 and A.2 to install U-bolts at both ends of the main beam section to be removed;

[0030] Step A.4: Place the through bar on the top surface of the main beam section to be removed, with both ends of the through bar passing under the pressure plate and extending to the top surface of the main beam section to be removed that is not removed, which is adjacent to both ends of the main beam section to be removed.

[0031] Step A.5: Insert fastening blocks between the two sides of the through bar and the U-bolts, and tighten the nuts on the U-bolts to connect the main beam section to be removed with the adjacent main beam sections that have not been removed at both ends.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] 1. Because the present invention is equipped with a main beam dismantling assembly, when the main beam is dismantled, the main beam segment to be dismantled is suspended and fixed to the adjacent undismantled main beam segments at both ends by U-bolts and through bars. The cut main beam segment to be dismantled is suspended on the undismantled main beam segments and will not fall directly, eliminating construction safety hazards. It can be lifted out of the foundation pit by hoisting equipment through the pre-embedded lifting rings, improving construction safety and efficiency.

[0034] 2. Because the present invention is equipped with a secondary beam removal component, when the secondary beam is removed, the section of the secondary beam to be removed is tied to the adjacent sections of the secondary beam that have not been removed at both ends by threading a tie rope through the reserved hole. The cut section of the secondary beam to be removed is tied to the section of the secondary beam that has not been removed, so it will not fall directly, eliminating construction safety hazards. It can be lifted out of the foundation pit by hoisting equipment through the pre-embedded lifting ring, improving construction safety and efficiency.

[0035] 3. Because the present invention is equipped with a main beam dismantling component and a secondary beam dismantling component, it can assist in the dismantling of the main beam and secondary beam. It uses the undismantled beam segments as dismantling fixing points, eliminating the need to erect full-span scaffolding under the main beam and secondary beam, thus avoiding the problems of large workload and low efficiency of full-span scaffolding erection. It is beneficial to control the construction progress and construction cost, and is especially suitable for the dismantling of main and secondary beams that are high above the ground of the foundation pit. Attached Figure Description

[0036] Figure 1 This is a plan view of the concrete internal bracing of a deep foundation pit in a certain project.

[0037] Figure 2 This is an installation plan view of the secondary beam removal component in the concrete internal bracing removal device of the present invention;

[0038] Figure 3 This is a schematic diagram of the segmentation of the secondary supporting beam in the concrete internal bracing removal device of the present invention;

[0039] Figure 4 This is an installation plan view of the main beam removal component in the concrete internal bracing removal device of the present invention;

[0040] Figure 5 yes Figure 4 Cross-sectional view at point BB.

[0041] In the diagram, 100 is the circular main support beam, 101 is the dovetail main support beam, 200 is the transverse secondary support beam, 201 is the diagonal secondary support beam, 202 is the radial secondary support beam, 301 is the secondary support beam segment to be removed, 302 is the secondary support beam segment not yet removed, 401 is the main support beam segment to be removed, 402 is the main support beam segment not yet removed, 5 is the lifting ring, 6 is the tie rope, 601 is the safety buckle, 7 is the reserved hole, 8 is the U-bolt, 9 is the pressure plate, 10 is the through bar, and 11 is the fastening block. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] Please see the appendix Figure 1 To be continued Figure 5 During the construction of a deep foundation pit in a certain project, the internal concrete support consists of main support beams and secondary support beams. The main support beams include two concentric rings of main support beams 100 arranged circumferentially around the foundation pit, and two opposing support beams 101 arranged within the inner ring of the main support beams 100. The concentric rings of the main support beams 100 and the opposing support beams 101 are divided into multiple beam segments according to the demolition requirements. The beam segment that needs to be cut is the main support beam segment 401 to be demolished, and the remaining beam segments are the main support beam segments 402 that have not been demolished. The supporting secondary beams include multiple transverse supporting secondary beams 200 spaced between two opposing supporting main beams 101, multiple oblique supporting secondary beams 201 spaced between the inner ring supporting main beam 100 and the two opposing supporting main beams 101, multiple oblique supporting secondary beams 201 spaced between the outer ring supporting main beam 100 and the foundation pit retaining structure, and multiple radial supporting secondary beams 202 spaced between the inner and outer ring supporting main beams 100. The transverse supporting secondary beams 200, oblique supporting secondary beams 201, and radial supporting secondary beams 202 are divided into multiple beam segments according to the demolition requirements. The beam segment that needs to be cut is the supporting secondary beam segment 301 to be demolished, and the remaining beam segments are the supporting secondary beam segments 302 that have not been demolished.

[0044] The distribution of the main and secondary supporting beams is determined according to the deep foundation pit construction design requirements, and will not be elaborated here. Before the demolition operation, each main and secondary supporting beam is divided into segments, ensuring that the length and weight of each segment are matched to construction conditions such as cutting safety, hoisting capacity, and site space.

[0045] Please see the appendix Figure 2 To be continued Figure 4A concrete internal support unsupported dismantling device includes a main beam dismantling assembly for dismantling the main supporting beam and a secondary beam dismantling assembly for dismantling the secondary supporting beams. The secondary beam dismantling assembly includes a tying mechanism and lifting rings 5. The tying mechanism is tied between adjacent secondary beam segments 301 to be dismantled and 302 not dismantled. Several lifting rings 5 ​​are pre-embedded in the secondary supporting beams at intervals, and each secondary beam segment 301 to be dismantled is provided with a lifting ring 5. The main beam dismantling assembly includes a cantilever mechanism and lifting rings 5. The two ends of the cantilever mechanism are fixed to the two ends of the main beam segment 401 to be dismantled, and the two ends of the cantilever mechanism overlap the 302 not dismantled at the two ends of the main beam segment 401 to be dismantled. Several lifting rings 5 ​​are pre-embedded in the main supporting beams at intervals, and each secondary beam segment 401 to be dismantled is provided with a lifting ring 5.

[0046] The secondary beam segment 301 to be dismantled is secured to the adjacent, undismantled secondary beam segments 302 via a tying mechanism. After the cutting equipment cuts the secondary beam segment 301, its weight is supported by the undismantled secondary beam segments 302 at both ends through the tying mechanism, preventing it from falling directly and avoiding safety hazards. After connecting the lifting ring 5 to the sling of the hoisting equipment, the weight of the secondary beam segment 301 is supported by the hoisting equipment, allowing the tying mechanism to be dismantled, and the secondary beam segment 301 to be lifted out of the pit by the hoisting equipment.

[0047] A cantilever mechanism connects the main beam segment 401 to be dismantled between two adjacent, undismantled main beam segments 402. After the cutting equipment cuts the main beam segment 401, its weight is supported by the undismantled segments 402 at both ends via the cantilever mechanism, preventing it from falling directly and avoiding safety hazards. After connecting the lifting ring 5 to the slings of the hoisting equipment, the weight of the main beam segment 401 is supported by the hoisting equipment. The tying mechanism can then be disassembled, allowing the hoisting equipment to lift the main beam segment 401 out of the pit.

[0048] During the casting of the main and secondary supporting beams, lifting rings 5 ​​are pre-embedded in the main and secondary supporting beams. The position and number of lifting rings 5 ​​are determined according to the segmentation of the main and secondary supporting beams. Preferably, a lifting ring 5 is provided on both sides of each section of the main supporting beam 401 and the secondary supporting beam 301 to be dismantled, so that the force is evenly distributed and the stability of the cut beam segments is improved during hoisting.

[0049] Preferably, the hoisting equipment can be a tower crane, truck crane, etc., and the appropriate hoisting equipment can be selected according to the weight of the secondary beam section 301 and the main beam section 401 to be dismantled.

[0050] Please see the appendix Figure 2 and attached Figure 3The tie mechanism includes a tie rope 6; the secondary support beam has pre-drilled holes 7 at intervals, and each section of the secondary support beam 301 to be dismantled has pre-drilled holes 7 at both ends. The secondary support beam 301 to be dismantled and its adjacent section of the secondary support beam 302 not to be dismantled are connected by the tie rope 6 through the two pre-drilled holes 7, so that the adjacent section of the secondary support beam 301 to be dismantled and the section of the secondary support beam 302 not to be dismantled are connected and fixed.

[0051] The pre-drilled holes 7 facilitate the threading of the tie rope 6, making the connection simple. Furthermore, the tie rope can be fixed from both sides through the pre-drilled holes at both ends of the secondary beam section 301 to be removed, preventing the secondary beam section 301 from flipping after being cut.

[0052] Preferably, the tie rope 6 can be made of steel wire rope, which can be easily passed through the reserved hole 7 and tied between the secondary beam section 301 to be removed and the secondary beam section 302 not removed, ensuring the connection stability of the secondary beam section 301 to be removed and the secondary beam section 302 not removed after cutting, and making disassembly convenient.

[0053] Please see the appendix Figure 2 The tie rope 6 is provided with a safety buckle 601, which abuts against the beam surface located at both ends of the reserved hole 7. That is, the four safety buckles 601 abut against the two sides of the secondary beam section 301 to be removed and the secondary beam section 302 not removed.

[0054] Safety buckle 601 can be a special safety buckle for steel wire rope, used to lock onto the tie rope 6 and fit against the beam surface, to prevent the secondary beam section 301 to be removed from slipping due to the inconsistent level of the two reserved holes 7 after it is cut, thereby improving the stability of the secondary beam section 301 to be removed after cutting.

[0055] Please see the appendix Figure 4 and attached Figure 5 The cantilever mechanism includes U-bolts 8, pressure plates 9, and through bars 10; a pair of U-bolts 8 are respectively arranged around the bottom and sides of both ends of the main beam section 401 to be dismantled, and the opening ends of each U-bolt 8 pass through the pressure plates 9 and are locked with nuts; the two ends of the through bars 10 are respectively inserted between the two pressure plates 9 and the top surfaces of the two ends of the main beam section 401 to be dismantled, and the two ends of the through bars 10 are respectively placed on the two adjacent sections of the main beam section 402 that have not been dismantled.

[0056] Since the circular main support beam 100 and the inner ring supporting main support beam 101 of the ring structure are arranged in different positions, they cannot be cut after being fixed by left and right ties in the same way as the secondary beams. Therefore, a cantilever mechanism is used to cantilever the main support beam section 401 to be dismantled.

[0057] The closed ends of a pair of U-bolts 8 are wrapped around the bottom of both ends of the main beam section 401 to be removed, to bear the weight of the main beam section 401 to be removed. The pair of U-bolts 8 are hung on both ends of the through bar 10 through the pressure plate 9, and the two ends of the through bar 10 rest on the adjacent main beam sections 402 that have not been removed. Thus, the main beam section 401 to be removed is transferred to the main beam section 402 that has not been removed through the pressure plate 9 and the through bar 10, so that the main beam section 401 to be removed is in a suspended state after being cut and will not fall.

[0058] Preferably, the U-bolt 8 can be a U-shaped round steel bolt. The pressure plate 9 has pre-drilled round holes at both ends to match the U-bolt 8 for passing through. Nuts are screwed onto the open ends of the U-bolt 8, pressing it firmly onto the pressure plate 9. The U-bolt 8 and the pressure plate 9 form a ring structure for passing through the main beam section 401 to be dismantled and the through bar 10, thereby hanging the main beam section 401 to be dismantled on the adjacent, undismantled main beam section 402 via the through bar 10.

[0059] Please see the appendix Figure 4 and attached Figure 5 The through bar 10 is set along the central axis of the supporting main beam. Fastening blocks 11 are provided between the two sides of the through bar 10 and the two ends of the opening of the U-bolt 8. The pressure plate 9 is pressed on the top surface of the through bar 10 and the fastening blocks 11.

[0060] Preferably, the fastening block 11 can be made of wood, wooden wedges, etc., to hold the through bar 10 between the two ends of the opening of the U-bolt 8, so as to prevent the through bar 10 from slipping and causing the cut-off support beam section 401 to slip.

[0061] Please see the appendix Figure 1 To be continued Figure 5 A method for removing a secondary beam supported by a concrete internal bracing removal device, comprising the following steps:

[0062] Step 1: Tie the tie mechanism between the end of the secondary beam section 301 to be removed and the adjacent secondary beam section 302 that has not been removed, so that the two ends of the secondary beam section 301 to be removed are tied and fixed to the secondary beam sections 302 at both ends by a pair of tie structures.

[0063] Step 1 includes the following sub-steps:

[0064] Step 1.1: The tie rope 6 is threaded through the reserved hole 7 at the end of the secondary beam section 301 to be removed and the reserved hole 7 in the adjacent secondary beam section 302 that has not been removed.

[0065] Step 1.2: Set safety buckles 601 on the tie rope 6, so that the four safety buckles 601 abut against the two sides of the secondary beam section 301 to be removed and the secondary beam section 302 not removed.

[0066] Step 1.3: Connect the knotted ropes 6 into a ring structure, so that one end of the secondary beam segment 301 to be removed is connected to the adjacent secondary beam segment 302 that has not been removed.

[0067] Step 1.4: Repeat steps 1.1-1.3 to connect both ends of the secondary beam segment 301 to be removed with the two adjacent secondary beam segments 302 that have not been removed.

[0068] Step 2: Cut both ends of the secondary beam segment 301 to be removed, so that the secondary beam segment 301 to be removed is disconnected from the secondary beam segments 302 at both ends that have not been removed; at this time, the two secondary beam segments 302 that have not been removed bear the weight of the secondary beam segment 301 to be removed through a pair of tie components.

[0069] Step 3: The hoisting equipment is connected to the secondary beam section 301 to be dismantled via slings and lifting lugs 5. At this time, the weight of the secondary beam section 301 to be dismantled is jointly borne by the secondary beam section 302 that has not been dismantled and the hoisting equipment.

[0070] Step 4: Remove a pair of tie mechanisms. At this time, the weight of the secondary beam segment 301 to be removed is supported by the hoisting equipment, which lifts the secondary beam segment 301 out of the foundation pit.

[0071] Please see the appendix Figure 2 and attached Figure 3 A method for removing a main beam supported by a concrete internal bracing removal device includes the following steps:

[0072] Step A: Fix the cantilever mechanism at both ends of the main beam section 401 to be dismantled, and place the two ends of the cantilever mechanism on the two sections of the main beam section 402 that are not dismantled and are adjacent to the two ends of the main beam section 401 to be dismantled.

[0073] Step A further includes the following sub-steps:

[0074] Step A.1: Wrap the U-bolts 8 around the bottom and both sides of the end of the main beam section 401 to be removed.

[0075] Step A.2: The openings of the U-bolt 8 pass through the pressure plate 9 and the nuts are screwed on.

[0076] Step A.3: Repeat steps A.1 and A.2 to install U-bolts 8 at both ends of the main beam segment 401 to be removed.

[0077] Step A.4: Place the through bar 10 on the top surface of the main beam section 401 to be removed, with both ends of the through bar 10 passing under the pressure plate 9, and both ends of the through bar 10 extending to the top surface of the main beam section 402 that is not removed and is adjacent to both ends of the main beam section 401 to be removed.

[0078] Step A.5: Insert fastening blocks 11 between the two sides of the through bar 10 and the U-bolts 8, and tighten the nuts on the U-bolts 8 to connect the main beam section 401 to be removed with the adjacent main beam sections 402 that have not been removed at both ends.

[0079] Step B: Cut both ends of the main support beam segment 401 to be removed, so that the main support beam segment 401 to be removed is disconnected from the main support beam segments 402 at both ends that have not been removed; at this time, the two main support beam segments 402 that have not been removed bear the weight of the main support beam segment 401 to be removed through the cantilever mechanism.

[0080] Step C: The hoisting equipment is connected to the main beam section 401 to be dismantled via slings and lifting lugs 5. At this time, the weight of the main beam section 401 to be dismantled is jointly borne by the main beam section 402 that has not been dismantled and the hoisting equipment.

[0081] Step D: Dismantle the cantilever mechanism. At this time, the weight of the main beam section 401 to be dismantled is supported by the hoisting equipment, which lifts the main beam section 401 out of the foundation pit.

[0082] This invention addresses two different forms of supporting main beams and supporting secondary beams within a foundation pit, employing corresponding main beam dismantling components and supporting secondary beam dismantling components to assist in the dismantling of the supporting main beams and supporting secondary beams, respectively. During the dismantling of the supporting main beam, the section 401 to be dismantled is suspended and fixed to the adjacent, undismantled supporting main beam sections 402 at both ends using U-bolts 8 and through-bars 10. During the dismantling of the supporting secondary beam, the section 301 to be dismantled is tied and fixed to the adjacent, undismantled supporting secondary beam sections 302 at both ends using tie ropes 6 threaded through pre-drilled holes 7. This eliminates the need for full-span scaffolding beneath the supporting main beams and supporting secondary beams, and prevents sections 301 and 401 from falling onto the scaffolding and affecting its structural safety when being cut.

[0083] If the construction of the floor slab in the inner support area is temporarily suspended due to the steel trestle above the supporting main beam and supporting secondary beam, and the beam segments after dismantling cannot be transported to the hoisting area by forklift through the floor slab, a suspended transport device for the dismantled inner support beam can be added.

[0084] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A concrete internal bracing removal device without support, characterized in that: The assembly includes a main beam dismantling component for dismantling the main beam and a secondary beam dismantling component for dismantling the secondary beams. The secondary beam dismantling component includes a tie mechanism and lifting rings (5). The tie mechanism is tied between adjacent secondary beam segments (301) to be dismantled and undismantled secondary beam segments (302). Several lifting rings (5) are pre-embedded in the secondary beams at intervals, and each secondary beam segment (301) to be dismantled is provided with a lifting ring (5). The main beam dismantling component includes a cantilever mechanism and lifting rings (5). The two ends of the cantilever mechanism are fixed to the two ends of the main beam segment (401) to be dismantled, and the two ends of the cantilever mechanism overlap the undismantled main beam segments (402) at both ends of the main beam segment (401) to be dismantled. Several lifting rings (5) are pre-embedded in the main beams at intervals, and each secondary beam segment (401) to be dismantled is provided with a lifting ring (5). The tie mechanism includes a tie rope (6); the secondary support beam has pre-drilled holes (7) at intervals, and each section of the secondary support beam to be removed (301) has pre-drilled holes (7) at both ends. The secondary support beam to be removed (301) and its adjacent unremoved secondary support beam (302) are connected by the tie rope (6) through the two pre-drilled holes (7), so that the adjacent secondary support beam to be removed (301) and the unremoved secondary support beam (302) are connected and fixed.

2. The concrete internal bracing removal device according to claim 1, characterized in that: The tie rope (6) is provided with a safety buckle (601). The safety buckle (601) abuts against the beam surface located at both ends of the reserved hole (7). That is, the four safety buckles (601) abut against the two sides of the secondary beam section (301) to be removed and the secondary beam section (302) not to be removed.

3. The concrete internal bracing removal device according to claim 1, characterized in that: The cantilever mechanism includes U-bolts (8), pressure plates (9), and through bars (10); a pair of U-bolts (8) are respectively arranged around the bottom and sides of the two ends of the main beam section (401) to be dismantled, and the two ends of the opening of each U-bolt (8) pass through the pressure plate (9) and are locked with nuts; the two ends of the through bars (10) are respectively inserted between the two pressure plates (9) and the top surfaces of the two ends of the main beam section (401) to be dismantled, and the two ends of the through bars (10) are respectively placed on the two adjacent sections of the main beam section (402) to be dismantled.

4. The concrete internal bracing removal device according to claim 3, characterized in that: The through bar (10) is set along the central axis of the supporting main beam. Fastening blocks (11) are provided between the two sides of the through bar (10) and the two ends of the opening of the U-bolt (8). The pressure plate (9) presses on the top surface of the through bar (10) and the fastening block (11).

5. A method for removing a secondary beam supported by a concrete internal bracing removal device as described in claim 1, characterized in that: Includes the following steps: Step 1: Tie the tie mechanism between the end of the secondary beam section (301) to be removed and the adjacent secondary beam section (302) that has not been removed, so that the two ends of the secondary beam section (301) to be removed are tied and fixed to the secondary beam sections (302) at both ends by a pair of tie mechanisms; Step 2: Cut both ends of the secondary support beam segment (301) to be removed, so that the secondary support beam segment (301) to be removed is separated from the secondary support beam segments (302) at both ends that have not been removed; at this time, the two secondary support beam segments (302) that have not been removed bear the weight of the secondary support beam segment (301) to be removed through a pair of tie mechanisms. Step 3: The hoisting equipment is connected to the secondary beam section (301) to be dismantled via slings and lifting rings (5). At this time, the weight of the secondary beam section (301) to be dismantled is borne by the secondary beam section (302) to be dismantled and the hoisting equipment. Step 4: Remove a pair of tie mechanisms. At this time, the weight of the secondary beam section (301) to be removed is carried by the hoisting equipment, and the secondary beam section (301) to be removed is lifted out of the foundation pit by the hoisting equipment.

6. The method for removing the supporting secondary beam according to claim 5, characterized in that: Step 1 includes the following sub-steps: Step 1.1: The tie rope (6) is threaded through the reserved hole (7) at the end of the secondary beam section (301) to be removed and the reserved hole (7) in the adjacent secondary beam section (302) that has not been removed; Step 1.2: Set safety buckles (601) on the tie rope (6) so that the four safety buckles (601) abut against the two sides of the secondary beam section (301) to be removed and the secondary beam section (302) not removed; Step 1.3: Connect the knotted ropes (6) into a ring structure so that one end of the secondary beam segment (301) to be removed is connected to the adjacent secondary beam segment (302) that has not been removed; Step 1.4: Repeat steps 1.1-1.3 to connect the two ends of the secondary beam segment (301) to be removed with the two adjacent secondary beam segments (302) that have not been removed.

7. A method for dismantling a main beam supported by a concrete internal bracing removal device as described in claim 1, characterized in that: Includes the following steps: Step A: Fix the cantilever mechanism at both ends of the main beam section (401) to be dismantled, and place the two ends of the cantilever mechanism on the two sections of the main beam section (402) that are not dismantled and are adjacent to the two ends of the main beam section (401) to be dismantled; Step B: Cut both ends of the main support beam segment (401) to be removed, so that the main support beam segment (401) to be removed is separated from the main support beam segments (402) at both ends that have not been removed; at this time, the two main support beam segments (402) that have not been removed bear the weight of the main support beam segment (401) to be removed through the cantilever mechanism. Step C: The hoisting equipment is connected to the main beam section (401) to be dismantled via slings and lifting rings (5). At this time, the weight of the main beam section (401) to be dismantled is jointly borne by the main beam section (402) to be dismantled and the hoisting equipment. Step D: Remove the cantilever mechanism. At this time, the weight of the main beam section (401) to be removed is carried by the hoisting equipment, and the main beam section (401) to be removed is lifted out of the foundation pit by the hoisting equipment.

8. The method for dismantling the supporting main beam according to claim 7, characterized in that: Step A further includes the following sub-steps: Step A.1: Wrap the U-bolts (8) around the bottom and both sides of the end of the main beam section (401) to be dismantled; Step A.2: The openings of the U-bolt (8) pass through the pressure plate (9) and the nuts are screwed on. Step A.3: Repeat steps A.1 and A.2 to install U-bolts (8) at both ends of the main beam section (401) to be removed. Step A.4: Place the through bar (10) on the top surface of the main beam section (401) to be removed, with both ends of the through bar (10) passing under the pressure plate (9) and both ends of the through bar (10) extending to the top surface of the main beam section (402) that is adjacent to the two ends of the main beam section (401) to be removed; Step A.5: Fill the gap between the two sides of the through bar (10) and the U-bolt (8) with fastening blocks (11), and tighten the nuts on the U-bolt (8) to connect the main beam section (401) to be removed with the adjacent main beam sections (402) that have not been removed.

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