Demolition process of subway connection passage and auxiliary demolition equipment

Abstract

This application relates to the field of subway construction technology, involving the demolition process of subway connection channels and auxiliary demolition equipment. This application provides a demolition process for subway connection channels. The demolition process includes: excavating earthwork in sections to the foundation base, erecting steel sections between the retaining piles and the bottom slab of the connection channel; demolishing the third support, and continuing to pour under the side wall roof; using I-beams to support the retaining piles at the roof beam, reserving a space for demolishing the retaining piles; demolishing the retaining piles in a way that after demolishing two adjacent retaining piles, one pile is skipped and then demolished, truncating the upper and lower parts of the demolished piles, and hoisting out the truncated piles as a whole; determining the positions of pipelines in the access portal and relocating them, cutting the access portal into pieces, and removing the cut fragments. Based on the above method, the retaining piles are demolished first, and then the access portal is demolished, which can effectively and orderly demolish the subway connection channel with high efficiency.

Description

Technical Field

[0001] This application relates to the field of subway construction, and particularly to the demolition process of subway connection channels and auxiliary demolition equipment. Background Art

[0002] During the construction of the subway, it is necessary to build concrete columns and sealing walls at the subway entrance for convenient construction. After the subway construction is completed, it is necessary to demolish the connection channels of the subway to make the stations connected. The connection channels of the subway usually include multiple retaining piles at the entrance and exit and the reinforced concrete of the sealing wall (entrance portal) of the subway connection.

[0003] Currently, the demolition method adopted is mechanical and manual demolition by multiple machines, but there is no demolition method for standard demolition of subway connection channels. The demolition work is chaotic and the efficiency is not high. Summary of the Invention

[0004] This application provides a demolition process for subway connection channels. First, the retaining piles are demolished, and then the access portal is demolished, which can effectively and orderly demolish the subway connection channels.

[0005] In a first aspect, an embodiment of this application provides a demolition process for subway connection channels. The subway connection channels include retaining piles and access portals. The demolition process includes:

[0006] Excavate the soil in sections to the base, and erect steel sections between the retaining piles and the bottom slab of the connection channel;

[0007] Demolish the third support, and continue to pour under the side wall roof;

[0008] Support the retaining piles with I-beams at the roof beam, and reserve the space for chiseling the retaining piles;

[0009] Break two adjacent retaining piles, then break every other pile. Cut off the upper and lower parts of the broken piles, and lift out the whole cut-off piles;

[0010] Determine the positions of the pipelines in the access portal and relocate them. Cut the access portal into blocks, and remove the cut fragments.

[0011] In the demolition process of subway connection channels provided by this application, the step of excavating the soil in sections to the base and erecting steel sections between the retaining piles and the bottom slab of the connection channel includes:

[0012] Excavate the soil in sections to the base, and temporarily leave the existing retaining piles without chiseling. Construct the base cushion, bottom slab and the waterproof layer on the side wall of the retaining piles near the connection channel;

[0013] Steel beams are erected between the existing retaining piles and the bottom slab of the connecting passage. The spacing of the steel beams is adjusted according to the support positions, and the spacing is not greater than 6m.

[0014] In the demolition process of the subway connecting passage provided in this application, when demolishing the two retaining piles, one pile is left between the demolished piles, and then the next pile is demolished. The upper and lower parts of the demolished piles are truncated, and the whole truncated pile is hoisted out, including:

[0015] Use a pneumatic pick to demolish two piles with one pile in between. Demolish in the order of from top to bottom. The chiseling range is from 200mm above the subway roof to the bottom of the bottom slab of the newly built connecting passage. First, chisel the concrete at the upper elevation position of the retaining pile, leaving the steel bars. After the upper concrete chiseling is completed, start chiseling the lower concrete. After all the chiseling is completed, cut the steel bars, and use a crane to hoist the pile steel bars out as a whole at the post-cast strip.

[0016] In the demolition process of the subway connecting passage provided in this application, determine the pipeline positions in the access portal and relocate them, and cut the access portal into blocks and remove the cut fragments, including:

[0017] Determine the pipeline positions in the access portal. Part of the ceiling is relocated to embed various pipelines. After the pipeline relocation, use a water drill or a wire saw to cut the access portal into segments and blocks according to the size of the connection opening (width 5.2m, height 2.8m), and remove the cut concrete from the connecting passage.

[0018] In the demolition process of the subway connecting passage provided in this application, use a pneumatic pick to demolish two piles with one pile in between, and demolish in the order of from top to bottom, including

[0019] Chisel the retaining piles No. 2, 3, 5, 6, 8, 9, 11, 12, and 14;

[0020] Support the "hanging-foot piles" of the retaining piles No. 3 and 5 with double 30a I-beams. After the support is completed, chisel the retaining piles No. 1 and 4.

[0021] After chiseling 1m of pile No. 13, when the support condition is met, support the "hanging-foot piles" with 30a I-beams in time. After the support is completed, chisel the remaining part of pile No. 13 and the retaining pile No. 15.

[0022] Start constructing the bottom slab, side walls, and top slab for the first pouring part.

[0023] When the strength of the first concrete pouring part reaches more than 75%, support pile No. 8 or 9. After the support is completed, start chiseling the retaining piles No. 7 and 10.

[0024] After the chiseling of the retaining piles No. 7 and 10 is completed, start constructing the second structural bottom slab, side walls, and top slab.

[0025] In the demolition process of the subway connection passage provided in this application, it includes:

[0026] Before cutting the access portal, the auxiliary demolition equipment is run to the first construction position, and the extension frame on the auxiliary demolition equipment is jacked against the cutting surface of the access portal. When cutting the access portal, cut along the cutting opening opened on the extension frame;

[0027] After cutting the access portal, flip the extension frame to be parallel to the ground, move the cut fragments into the extension frame, control the auxiliary demolition equipment to move from the first construction position to the second construction position, and clear the fragments from the current construction site.

[0028] In the demolition process of the subway connection passage provided in this application, it includes:

[0029] Control the auxiliary demolition equipment to move to the third construction position. After the extension frame extends a preset distance relative to the main body of the auxiliary demolition equipment, use the extension frame as a fulcrum to lay a rainproof cloth to cover the current construction site.

[0030] In a second aspect, this application provides an auxiliary demolition equipment, including:

[0031] Guide rails;

[0032] A driving component, which is slidably connected to the guide rails, and the driving component is configured to move on any slidable part of the guide rails;

[0033] An extension frame, which is connected to the driving component, and the extension frame is configured to be controlled by the driving component to expand and contract, and to flip a preset angle relative to the guide rails.

[0034] In the auxiliary demolition equipment provided in this application, the extension frame includes:

[0035] A main frame, which is fixedly connected to the driving component, and four cutting areas are formed between the main frames. The four cutting areas are arranged at intervals along the periphery of the main frame;

[0036] Frame parts, which are arranged in each cutting area, and the frame parts are fixedly connected to the main frame, and there is a cutting opening between two adjacent frame parts.

[0037] In a third aspect, this application provides an auxiliary demolition equipment, which is arranged in a subway construction site and is used to assist in the demolition of the subway connection passage, including:

[0038] A track system, which is used to assist other components of the auxiliary demolition equipment to move in the construction site;

[0039] An extension frame, which is used to abut against the access portal at the first construction position, move the broken blocks from the first construction position to the second construction position, and support the rainproof cloth at the third construction position;

[0040] A driving system, which is used to drive the extension frame to abut against the access portal at the first construction position, drive the extension frame to move from the first construction position to the second construction position, rotate the extension frame relative to the track system to a vertical angle, and drive the extension frame to move to the third construction position.

[0041] The demolition process of the subway connection passage provided by this application includes: excavating the soil in sections to the base, erecting steel profiles between the retaining piles and the bottom slab of the connection passage; demolishing the third support and continuing to pour under the side wall roof; using I-beams to support the retaining piles at the roof beam, reserving a space for demolishing the retaining piles; demolishing the two retaining piles after the piles at intervals of one pile, cutting the upper and lower parts of the demolished piles, and hoisting the whole cut piles out; determining the pipeline positions in the access portal and diverting them, cutting the access portal in blocks, and removing the cut broken blocks. Based on the above method, the retaining piles are demolished first, and then the access portal is demolished, which can effectively and orderly demolish the subway connection passage with high efficiency.

[0042] The auxiliary demolition equipment provided by this application controls the telescopic movement of the extension frame through a driving component and flips it by a preset angle relative to the guide rail. The driving component slides on the guide rail, so that before cutting the access portal, the auxiliary demolition equipment is run to the first construction position, and the extension frame on the auxiliary demolition equipment is abutted against the cutting surface of the access portal. When cutting the access portal, the cutting is carried out along the cutting opening opened on the extension frame; after cutting the access portal, the extension frame is flipped to be parallel to the ground, the cut broken blocks are moved into the extension frame, the auxiliary demolition equipment is controlled to move from the first construction position to the second construction position, and the broken blocks are cleared out of the current construction site. It can also control the auxiliary demolition equipment to move to the third construction position. After the extension frame is extended by a preset distance relative to the main body of the auxiliary demolition equipment, a rainproof cloth is laid with the extension frame as a fulcrum to cover the current construction site.

[0043] The auxiliary demolition equipment provided by this application is based on a track system, an extension frame, and a drive system, and assists other components of the auxiliary demolition equipment to move in the construction site, abut against the access portal at the first construction position, move the fragments from the first construction position to the second construction position, support the rainproof cloth at the third construction position, and the drive system drives the extension frame to abut against the access portal at the first construction position, is used to drive the extension frame to move from the first construction position to the second construction position, is used to rotate the extension frame relative to the track system to a vertical angle, and drives the extension frame to move to the third construction position.

[0044] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0046] Figure 1 It is a schematic diagram of the demolition project location provided by the embodiment of this application;

[0047] Figure 2 It is a schematic diagram of the demolition project location provided by the embodiment of this application;

[0048] Figure 3 It is a schematic diagram of the demolition process of the subway connection passage provided by the embodiment of this application;

[0049] Figure 4 It is a schematic diagram of the demolition process of the subway connection passage provided by the embodiment of this application;

[0050] Figure 5 It is a schematic diagram of the demolition process of the subway connection passage provided by the embodiment of this application;

[0051] Figure 6 It is a schematic diagram of the demolition process of the subway connection passage provided by the embodiment of this application;

[0052] Figure 7 It is a schematic diagram of the alternate one-break-two process provided by the embodiment of this application;

[0053] Figure 8 It is a cross-sectional view of the construction measures for demolishing the subway entrance and exit blocking wall section provided by the embodiment of this application;

[0054] Figure 9 It is a cross-sectional view of the construction measures for demolishing the subway retaining piles provided by the embodiment of this application;

[0055] Figure 10 It is a schematic diagram of the plugging wall (access portal) at the iron access point provided by the embodiment of the present application;

[0056] Figure 11 It is a schematic diagram of the overall auxiliary demolition equipment provided by the embodiment of the present application;

[0057] Figure 12 It is a schematic diagram of the extension frame and the drive assembly (drive system) provided by the embodiment of the present application;

[0058] Figure 13 It is a schematic diagram of the drive assembly provided by the embodiment of the present application;

[0059] Figure 14 It is a schematic diagram of the structure of the extension frame provided by the embodiment of the present application.

[0060] Description of main elements and symbols:

[0061] Guide rail; 20. Drive assembly; 201. Slide block; 202. Fixed part; 203. Rotating shaft; 204. First motor; 205. Extension part; 206. Mounting part; 207. Telescopic part; 208. Second motor;

[0062] 30. Extension frame; 301. Main frame; 302. Frame part; 31. Cutting opening. Embodiment

[0063] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0064] Next, some embodiments of the present application will be described in detail in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0065] It should be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification of the present application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0066] It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. For example, the first groove and the second groove are merely used to distinguish different grooves and do not limit their order. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0067] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0068] During subway construction, concrete columns and blocking walls are required at subway entrances to facilitate construction. After completion, the connecting passages between the subway and subway stations need to be demolished to allow the stations to connect. Subway connecting passages typically consist of multiple guardrails (guard piles) at the entrances and exits, and reinforced concrete blocking walls (access portals) at the subway entrances. Current demolition methods involve multiple machines and manual labor, but there's no standardized method for dismantling subway connecting passages, resulting in chaotic and inefficient demolition.

[0069] In order to solve the above problems, the present application provides a demolition process for a subway connecting passage, which includes: excavating the earth in sections to the base, erecting steel sections between the retaining piles and the bottom plate of the connecting passage; removing the third support, and continuing to pour under the side wall top plate; using I-beams to support the retaining piles at the top plate beam, and reserving space for chiseling out the retaining piles; breaking two retaining piles and then breaking another pile at intervals, cutting off the broken piles above and below, and hoisting out the entire cut pile; determining the position of the pipeline in the access portal and relocating it, cutting the access portal into blocks, and removing the cut pieces. Based on the above method, the retaining piles are removed first, and then the access portal is removed, so that the subway connecting passage can be effectively and orderly demolished with high efficiency.

[0070] refer to Figure 1 and Figure 2 Sixteen reinforced concrete columns at the subway entrance and exit, along with a 9.57m³ barrier wall at the subway connection, were removed to connect the tunnel to the subway entrance and exit. 11.8m of soil was placed above the entrance and exit roof at the connection point. The soil above the roof was backfill, primarily composed of silty clay and construction waste. The connection portal was excavated to a width of 5.2m, a height of 2.3m, and a 0.8m thick sidewall.

[0071] refer to Figures 3 - 6 , Figures 8 - 10, showing a schematic diagram of a demolition process for a subway connecting passage, the demolition process for the subway connecting passage, the subway connecting passage including retaining piles and an access portal, the demolition process comprising:

[0072] Excavate the earth in sections to the base, and install steel sections between the retaining piles and the bottom plate of the connecting channel;

[0073] Remove the third support and continue pouring towards the bottom of the side wall top plate;

[0074] I-beams are used to support the retaining piles at the top beam, and space is reserved for the retaining piles to be chiseled out;

[0075] After breaking two of the retaining piles, another pile is broken at intervals, the broken piles are cut off at the top and bottom, and the cut piles are hoisted out in one piece;

[0076] The position of the pipeline in the access portal is determined and relocated, the access portal is cut into pieces, and the cut pieces are removed.

[0077] Before removing the subway retaining piles, the connecting tunnel structure roof was constructed (using full-height brackets, and removal was not permitted until the concrete in the post-cast zone reached the design strength). The roof was constructed to KL5, with a construction joint reserved. After the top slab concrete was poured, grouting was performed using a φ32 small conduit to reinforce the soil within 3m above the subway roof (see Grouting Reinforcement Methods for details). Once the concrete reached 100% strength, the subway retaining piles were removed using a jackhammer, breaking them one at a time, then breaking them down. The removal range was from 200mm above the subway roof to the bottom of the new connecting tunnel floor. Concrete at the upper elevation of the retaining piles was first removed, retaining the rebar. Once the upper concrete was removed, the lower concrete was removed. Once all the concrete was removed, the rebar was cut and hoisted whole from the post-cast zone using a crane. Following these removals, the lintel and the remaining top slab and wall CQ1 were constructed. Once the concrete reached 100% strength, the full-height brackets were removed.

[0078] Reinforcement for the retaining piles is cut using a cutting machine, and the reinforcement at the bottom of the pile is cut to the base elevation to ensure no impact on structural construction. Pile excavation is performed in sections upward along the pile, with enhanced pile and foundation pit monitoring. Grouting and support preparations are also in place. If horizontal deformation of the retaining piles or the axial force of the steel supports reaches 75% of the control value, additional steel supports should be implemented, while continued monitoring and measurement are strengthened to ensure pit safety. Reinforcement piles include multiple retaining piles.

[0079] Based on the above demolition method, the retaining piles are removed first, and then the access portal is removed. This can effectively and orderly demolish the subway connecting passage with high efficiency.

[0080] In some embodiments, the step of excavating earth in sections to the base and installing steel sections between the retaining piles and the bottom plate of the connecting channel includes:

[0081] Excavate the earthwork in sections to the base, leaving the retaining piles of the existing structure unremoved for the time being, and construct the base cushion layer, bottom plate, and waterproof layer on the side walls of the retaining piles near the connecting passage;

[0082] Steel sections are set up between the reserved existing retaining piles and the bottom plate of the connecting channel. The spacing between the steel sections is adjusted according to the support position and the spacing is not greater than 6m.

[0083] In some embodiments, after breaking two of the retaining piles, breaking another pile at intervals, cutting the broken piles at the top and bottom, and hoisting the cut piles out in one piece, comprises:

[0084] Use a jackhammer to break two piles with one pile between them, breaking them from top to bottom. The range of the chiseling is from 200mm above the subway roof to the bottom of the new connecting channel floor. First, break the concrete at the upper elevation of the retaining piles and retain the steel bars. After the upper concrete is chiseled out, start chiseling the lower concrete. After all the concrete is chiseled out, cut off the steel bars and use a crane to lift the pile steel bars out at the post-casting joint.

[0085] In some embodiments, determining the position of the pipeline in the access portal and relocating it, cutting the access portal into pieces, and removing the cut pieces include:

[0086] Determine the position of the pipelines in the access portal, partially relocate the suspended ceiling to pre-embed various pipelines, and after the pipelines are relocated, use a water drill or rope saw to cut them into sections and blocks according to the size of the connection port (width 5.2m, height 2.8m), and remove the cut concrete from the connecting channel.

[0087] In some embodiments, reference Figure 7 , shows the process of breaking two piles with one pile between them, using a jackhammer to break two piles, breaking them from top to bottom, including:

[0088] Remove retaining piles No. 2, 3, 5, 6, 8, 9, 11, 12 and 14;

[0089] The No. 3 and No. 5 retaining piles are supported by 30a double-jointed I-beam "hanging piles". After the support is completed, the No. 1 and No. 4 retaining piles are chiseled out.

[0090] After the No. 13 pile is chiseled out 1m, the "hanging pile" is promptly supported with 30a I-beam when the support conditions are met. After the support is completed, the remaining part of No. 13 and the No. 15 retaining pile are chiseled out.

[0091] The first pouring part begins with the construction of the bottom plate, side walls and top plate.

[0092] When the strength of the first concrete placement part reaches more than 75%, shore up pile No. 8 or No. 9. After the shoring is completed, start chiseling out retaining piles No. 7 and No. 10.

[0093] After chiseling out retaining piles No. 7 and No. 10, start constructing the second - phase structural floor slab, side wall and top slab.

[0094] Adopting the method of chiseling out two while leaving one intact can ensure the strength of the overall structure when chiseling out the retaining piles, prevent partial structural collapse and cause damage.

[0095] In some embodiments, it includes: before cutting the access portal, operate the auxiliary demolition equipment to the first construction position, hold the extension frame 30 on the auxiliary demolition equipment against the cutting surface of the access portal, and when cutting the access portal, cut along the cutting opening 31 opened on the extension frame 30;

[0096] After cutting the access portal, flip the extension frame 30 to be parallel to the ground, move the cut fragments into the extension frame 30, control the auxiliary demolition equipment to move from the first construction position to the second construction position, and clear the fragments from the current construction site.

[0097] Operating the auxiliary demolition equipment to the first construction position and holding the extension frame 30 on the auxiliary demolition equipment against the cutting surface of the access portal can ensure that when demolishing the access portal, the cut - off part of the access portal structure will not collapse during segmented cutting, ensuring personnel safety.

[0098] After cutting the access portal, flip the extension frame 30 to be parallel to the ground, move the cut fragments into the extension frame 30, control the auxiliary demolition equipment to move from the first construction position to the second construction position, and clear the fragments from the current construction site. The above - mentioned setting can avoid the problem of multiple equipment cooperating to clean the fragments, improve the transfer efficiency of the fragments. Generally, only two pieces of equipment are needed to cooperate with the auxiliary demolition equipment in the foundation pit to quickly clear the fragments out of the foundation pit.

[0099] In some embodiments, it includes: controlling the auxiliary demolition equipment to move to the third construction position, after stretching the extension frame 30 a preset distance relative to the auxiliary demolition equipment body, cover the current construction site with a rain - proof cloth using the extension frame 30 as a fulcrum.

[0100] In the above method, the auxiliary demolition equipment is moved to the third construction position, and a rainproof cloth is laid with the extension frame 30 as the fulcrum to cover the current construction site, which can protect the foundation pit from water accumulation when it rains. At the same time, in cooperation with external waterproof measures, earth mounds are built around the foundation pit to prevent water accumulation in the foundation pit, and it can also enable personnel to work even when it rains, or provide sun protection for personnel in summer.

[0101] Reference Figures 11 - 14 , the present application also provides an auxiliary demolition equipment, including: a guide rail 10; a driving component 20, which is slidably connected to the guide rail 10, and the driving component 20 is configured to move on any slidable part of the guide rail 10;

[0102] An extension frame 30, connected to the driving component 20, and the extension frame 30 is configured to be controlled by the driving component 20 to expand and contract, and to flip a preset angle relative to the guide rail 10.

[0103] By controlling the driving component 20 to expand and contract the extension frame 30 and flip a preset angle relative to the guide rail 10, and the driving component 20 slides on the guide rail 10, before cutting the access portal, the auxiliary demolition equipment is run to the first construction position, and the extension frame 30 on the auxiliary demolition equipment is abutted against the cutting surface of the access portal. When cutting the access portal, cutting is performed along the cutting opening 31 opened on the extension frame 30; after cutting the access portal, the extension frame 30 is flipped to be parallel to the ground, and the cut fragments are moved into the extension frame 30, and the auxiliary demolition equipment is controlled to move from the first construction position to the second construction position to clear the fragments from the current construction site. It is also possible to control the auxiliary demolition equipment to move to the third construction position, after the extension frame 30 is extended a preset distance relative to the auxiliary demolition equipment body, a rainproof cloth is laid with the extension frame 30 as the fulcrum to cover the current construction site.

[0104] Reference Figure 12 and Figure 14 , in some embodiments, the extension frame 30 includes:

[0105] A main frame 301, fixedly connected to the driving component 20, and four cutting areas are formed between the main frames 301, and the four cutting areas are arranged at intervals along the periphery of the main frame 301;

[0106] A frame part 302, arranged in each cutting area, the frame part 302 is fixedly connected to the main frame 301, and there is a cutting opening 31 between two adjacent frame parts 302.

[0107] When cutting the access portal along the cutting opening 31, part of the portal concrete is still connected. At this time, a hammering device is needed to hammer it to separate the fragments of the portal. When the hammering device hammers the portal, the frame part 302 still adheres to the portal to prevent the fragments from rolling down and causing damage.

[0108] In some embodiments, the driving assembly 20 includes a slider 201, a fixing part 202, a rotating part, an extension part 205, a first motor 204, a mounting part 206, a telescopic rod, and a second motor 208. The slider 201 is slidably connected to the slide rail, and the fixing part 202 is fixedly connected to the surface of the slider 201. The fixing part 202 has a rotating groove, and the rotating part is rotatably connected in the rotating groove. The rotating part includes a rotating shaft 203, and the rotating shaft 203 is rotatably connected to the fixing part 202 through a rotating hole, and the rotating shaft 203 passes through the fixing part 202. The first motor 204 is fixedly connected to the slider 201, and the driving end of the first motor 204 is fixedly connected to the rotating shaft 203. The rotation of the first motor 204 can drive the rotation of the rotating part. The extension part 205 is fixedly connected to the rotating part, and one end of the extension part 205 is fixedly connected with a mounting part 206. The telescopic part 207 passes through the mounting part 206 and the extension part 205, and the telescopic part 207 can telescopically move relative to the extension part 205. A second motor 208 is installed in the mounting part 206, and the driving end of the second motor 208 is fixedly connected with a gear. The side wall of the telescopic part 207 is provided with a long groove, and the inner wall of the groove has a tooth groove corresponding to the gear, and the two are meshed, so that the second motor 208 can drive the telescopic part 207 to telescopically move relative to the extension part 205. The telescopic part 207 is fixedly connected to the center of the main frame 301.

[0109] The first construction position is located at one end of the guide rail 10, the second construction position is at the opposite end of the guide rail 10, and the third construction position is located in the middle of the guide rail 10. The guide rail 10 is installed in the foundation pit.

[0110] A driving motor is provided on the slider 201 for driving the slider 201 to slide to any position relative to the guide rail 10.

[0111] When the docking entrance portal is pressed, the slider 201 moves on the guide rail 10 to the first construction position. At this time, the first motor 204 drives the rotating shaft 203 to rotate, the rotating shaft 203 drives the extension part 205 and the telescopic part 207 to rotate, and the second motor 208 controls the telescopic part 207 to expand and contract, so that the extension frame 30 is exactly flush with the portal and abuts against the portal. When transporting the broken pieces, control the second motor 208 to contract the telescopic part 207, and the first motor 204 drives the rotating shaft 203 to rotate, so that the extension frame 30 is parallel to the ground. At this time, the broken pieces are excavated into the frame part 302 by an excavator. The frame part 302 also includes a plurality of connecting rods arranged at intervals, which can support the broken pieces. Control the slider 201 to move from the first construction position to the second construction position, and then the broken pieces are dug out by the excavator, and the broken piece transfer can be quickly completed. Control the second motor 208 to extend the telescopic part 207, and the first motor 204 drives the rotating shaft 203 to rotate, so that the extension frame 30 is parallel to the ground. Control the extension frame 30 to be flush with the upper part of the foundation pit, cover it with a rain cloth, and it can prevent sun or rain. At this time, the auxiliary demolition equipment cannot be used to disassemble the portal, but other facilities in the foundation pit can be demolished.

[0112] The main frame 301 is in a cross shape. The cross main frame 301 divides an area into four areas, and the frame parts 302 are respectively connected to the extension parts of the cross main frame 301.

[0113] The auxiliary demolition equipment provided by the present application is arranged in the subway construction site and is used to assist in the demolition of the subway connection passage, including:

[0114] The track system is used to assist other components of the auxiliary demolition equipment to move in the construction site;

[0115] The extension frame 30 is used to abut against the docking entrance portal at the first construction position, move the broken pieces from the first construction position to the second construction position, and support the rain-proof cloth at the third construction position;

[0116] The drive system is used to drive the extension frame 30 to abut against the docking entrance portal at the first construction position, drive the extension frame 30 to move from the first construction position to the second construction position, rotate the extension frame 30 relative to the track system to a vertical angle, and drive the extension frame 30 to move to the third construction position.

[0117] Reference Figures 11 - 14, the auxiliary demolition equipment provided by the present application is based on a track system, an extension frame 30, and a drive system, and assists other components of the auxiliary demolition equipment to move in the construction site, abut against the access portal at the first construction position, move the debris from the first construction position to the second construction position, support the rainproof cloth at the third construction position, and the drive system drives the extension frame 30 to abut against the access portal at the first construction position, is used to drive the extension frame 30 to move from the first construction position to the second construction position, is used to rotate the extension frame 30 relative to the track system to a vertical angle, and drives the extension frame 30 to move to the third construction position.

[0118] As mentioned above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or replacements, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. Demolition process of subway connection passage, characterized in that, The subway connecting passage includes retaining piles and an access portal, and the demolition process includes: Excavate the earth in sections to the base, and install steel sections between the retaining piles and the bottom plate of the connecting channel; Remove the third support and continue pouring towards the bottom of the side wall top plate; I-beams are used to support the retaining piles at the top beam, and space is reserved for the retaining piles to be chiseled out; After breaking two of the retaining piles, another pile is broken at intervals, the broken piles are cut off at the top and bottom, and the cut piles are hoisted out in one piece; Determine the position of the pipeline in the access portal and relocate it, cut the access portal into pieces, and remove the cut pieces; After breaking two of the retaining piles, another pile is broken at intervals, the broken piles are cut off at the top and bottom, and the cut piles are hoisted out in one piece, including: Use a jackhammer to break two piles at a time, breaking them from top to bottom. The range of the chiseling is from 200mm above the subway roof to the bottom of the new connecting channel floor. First, break the concrete at the upper elevation of the retaining piles, retaining the steel bars. After the upper concrete is chiseled out, start chiseling the lower concrete. After all the concrete is chiseled out, cut the steel bars and use a crane to lift the pile steel bars out at the post-casting zone. The method of using a jackhammer to break two piles with one pile between them, breaking them from top to bottom, includes: Remove retaining piles No. 2, 3, 5, 6, 8, 9, 11, 12 and 14; Use 30a double-jointed I-beams to support the No. 3 and No. 5 retaining piles as "hanging piles". After the support is completed, remove the No. 1 and No. 4 retaining piles. After the No. 13 pile is chiseled out 1m, the "hanging pile" is promptly supported with 32a I-beam when the support is ready. After the support is completed, the remaining part of No. 13 and the No. 15 retaining pile are chiseled out; The first pouring part begins with the construction of the bottom plate, side walls, and top plate; When the strength of the first concrete pouring reaches more than 75%, support the No. 8 or No. 9 pile. After the support is completed, start to remove the No. 7 and No. 10 retaining piles; After the removal of No. 7 and No. 10 retaining piles, the second construction of the structural bottom plate, side wall and top plate began; The step of excavating earthwork in sections to the base and installing steel sections between the retaining piles and the bottom plate of the connecting channel includes: Excavate the earthwork in sections to the base, leaving the retaining piles of the existing structure unremoved for the time being, and construct the base cushion layer, bottom plate, and waterproof layer on the side walls of the retaining piles near the connecting passage; Set up steel sections between the reserved existing retaining piles and the bottom plate of the connecting channel. The spacing between the steel sections is adjusted according to the support position and the spacing is not more than 6m; The determining and relocating the pipeline position in the access portal, cutting the access portal into blocks, and removing the cut blocks include: Determine the position of the pipeline in the access door, partially relocate the ceiling to pre-embed various pipelines, and after the pipeline is relocated, use a water drill or rope saw to cut it in sections and blocks according to the size of the connection port, and remove the cut concrete from the connecting channel.

2. The demolition process of the subway connection passage according to claim 1, characterized in that include: Before cutting the access door, the auxiliary demolition device is moved to the first construction position, and the extension frame on the auxiliary demolition device is held against the cutting surface of the access door. When cutting the access door, the cutting is performed along the cutting opening on the extension frame. After cutting the access portal, flip the extension frame to be parallel to the ground, move the cut fragments into the extension frame, control the auxiliary demolition equipment to move from the first construction position to the second construction position, and remove the fragments from the current construction site.

3. The demolition process of the subway connection passage according to claim 2, characterized in that, Including: Control the auxiliary demolition equipment to move to the third construction position. After the extension frame is extended a preset distance relative to the auxiliary demolition equipment body, lay a rainproof cloth with the extension frame as a fulcrum to cover the current construction site.

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