Underwater concrete cofferdam cutting method and device

Abstract

The invention relates to the technical field of diamond chain rope machine cutting, and proposes an underwater concrete cofferdam cutting method. The method adopts a special underwater concrete cofferdam cutting device, and comprises the following steps: 1. installing the underwater concrete cofferdam cutting device on an object to be cut; 2. forming a closed loop through the diamond chain rope through the cutting device and making the diamond chain rope segment cross the vertical transverse cutting line of the object to be cut; 3. performing a first vertical transverse cutting on the object to be cut; 4. moving the cutting device backward, making the diamond chain rope segment cross the horizontal transverse cutting line of the object to be cut; 5. performing a second horizontal transverse cutting on the bottom of the object to be cut; 6. installing a segmented vertical transverse cutting device on the object to be cut; 7. performing segmented vertical transverse cutting on the object to be cut, and lifting the cut object; the invention solves the technical problem of fixing and winding a diamond chain on a concrete cofferdam to be cut, and has the advantages of simple equipment, convenient operation, good implementation effect, and the like.

Description

Technical Field

[0001] The invention relates to the technical field of diamond chain rope machine cutting, in particular to a cutting method for underwater concrete cofferdams. Background Art

[0002] Chinese patent application number 201810393777.7 discloses a method for dismantling a concrete support beam without a bracket, which includes the following steps.

[0003] Step a: Determine the cutting plan according to the actual situation on site, and mark the cutting position on the concrete support beam to be cut according to the cutting plan; Step b: Chisel off the concrete at the upper corner of the cutting position of the support beam to expose the main reinforcement at the upper corner of the support beam, and chisel a through groove for inserting the diamond chain under the main reinforcement; Step c: Pass the diamond chain through the groove, wrap it around the bottom of the support beam, connect and seal the diamond chain, and then use the diamond chain to cut the support beam in sections; Step d: After the segmented cutting of the support beam is completed, use a crane to lift each section of the support beam, and cut off the main reinforcement connected to the upper part of the support beam, so that each section of the support beam is completely cut, and then hoist it section by section.

[0004] This patent discloses a technical solution of winding the diamond chain along the bottom of the support beam, connecting and sealing the diamond chain, and then using the diamond chain to perform segmented cutting of the support beam.

[0005] In the prior art, diamond chains are commonly used to cut concrete, ore, etc. through the above-mentioned scheme. However, when using diamond chains to cut underwater concrete cofferdams, the technical problems that still need to be solved are mainly how to fix and wrap the diamond chain rope around the concrete cofferdam to be cut and what steps to take. Summary of the invention

[0006] The purpose of the present invention is to propose an underwater concrete cofferdam cutting method, which solves the technical problem of fixing and winding a diamond chain on the concrete cofferdam to be cut by designing a new underwater concrete cofferdam cutting equipment, and at the same time proposes steps for cutting the underwater concrete cofferdam using the equipment. The present invention has the advantages of simple equipment, easy operation and good implementation effect.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] An underwater concrete cofferdam cutting device comprises a steel structure support, a cutting machine mainframe, a diamond chain rope and a chain rope tension adjustment device, wherein a plurality of sprockets are arranged on the steel structure support.

[0009] The steel structure support includes an upper support frame and a lower support side frame: the upper support frame includes a horizontal frame and a vertical frame vertically connected to each other, the width of the vertical frame is greater than the width of the cofferdam of the object to be cut, the two lower support side frames are respectively connected to the two side edges of the upper support frame at flush ends, the spacing between the two lower support side frames is greater than the width of the cofferdam of the object to be cut, one side of the lower support side frame is flush with the end edge of the vertical frame and constitutes the front end of the steel structure support, and the horizontal frame end away from the front end of the steel structure support is the rear end of the steel structure support.

[0010] The vertical frame away from the horizontal frame end is the upper end of the steel structure support, and the lower support side frame away from the horizontal frame end is the lower end of the lower support side frame.

[0011] Two sets of redirecting sprockets are arranged on the horizontal frame, upper sprockets are arranged on both sides of the upper end of the steel structure support, and universal lower sprockets are arranged on the ends of the lower supporting side frames.

[0012] The diamond chain rope can be connected to the driving wheel of the cutting machine main machine and form a closed loop through two sets of redirecting sprockets, two upper sprockets and two universal lower sprockets on the steel structure bracket and can be driven by the cutting machine main machine. The chain rope tension adjustment device has a chain rope adjustment motor and can adjust the tightness of the diamond chain rope.

[0013] The chain rope tension adjustment device includes a slide rail, an adjustment screw and a chain rope adjustment motor. The adjustment screw connects the chain rope adjustment motor to the cutting machine host. The cutting machine host is installed on the slide rail. The chain rope adjustment motor can drive the adjustment screw to move the cutting machine host on the slide rail to adjust the tension of the diamond chain rope.

[0014] The universal lower sprocket is a double sprocket structure to prevent the rope from falling off.

[0015] The optimization scheme includes: the chain rope tension adjustment device is attached to the cutting machine mainframe or is separately arranged on the upper support frame, and the diamond chain rope passes through the chain rope tension adjustment device.

[0016] An underwater concrete cofferdam cutting method adopts an underwater concrete cofferdam cutting device, wherein the underwater concrete cofferdam cutting device is the underwater concrete cofferdam cutting device described above, and comprises the following steps:

[0017] Step 1, install the underwater concrete cofferdam cutting equipment, fix the steel structure support, the cutting machine main unit and the chain rope tension adjustment device on the cofferdam to be cut, so that the two lower support side frames of the steel structure support are respectively located on both sides of the cofferdam to be cut, and the lower end of the lower support side frame extends to the bottom of the cofferdam to be cut, and the front end of the steel structure support is located near the cutting line of the cofferdam to be cut.

[0018] Step 2, install the diamond chain rope, connect the diamond chain rope to the driving wheel of the cutting machine main engine and form a closed loop through two sets of redirecting sprockets, two upper sprockets and two universal lower sprockets on the steel structure bracket. The diamond chain rope section between the two universal lower sprockets crosses the vertical and horizontal cutting line of the cofferdam of the object to be cut.

[0019] Step 3, make the first vertical and horizontal cut on the cofferdam of the object to be cut, start the main cutting machine, and make the diamond chain rope make the first vertical and horizontal cut on the cofferdam of the object to be cut from top to bottom. The chain rope tension adjustment device adjusts the tightness of the diamond chain rope at the same time. During the cutting operation, the diamond chain rope segment between the two universal lower sprockets changes from an arc to a straight line, and finally cuts the first vertical and horizontal cutting seam, and shuts down the main cutting machine and the chain rope adjustment motor.

[0020] Step 4, move the cutting equipment, move the steel structure support, the main cutting machine and the chain rope tension adjustment device to the rear end of the steel structure support for a distance and fix them on the cofferdam of the object to be cut. The equipment layout after the movement is the same as step 1, and the installed diamond chain rope moves with the equipment, and the diamond chain rope section between the two universal lower sprockets crosses the horizontal transverse cutting line of the cofferdam of the object to be cut;

[0021] Step 5, make a second horizontal transverse cut on the bottom of the cofferdam to be cut, start the main cutting machine to make the diamond chain rope make a second horizontal transverse cut on the cofferdam to be cut, and the chain rope tension adjustment device adjusts the tightness of the diamond chain rope at the same time. During the cutting operation, the diamond chain rope segment between the two universal lower sprockets changes from an arc to a straight line, and a second horizontal transverse cutting seam is cut, and the main cutting machine and the chain rope adjustment motor are shut down.

[0022] Step 6, install the segmented vertical and transverse cutting equipment on the cofferdam of the object to be cut, the segmented vertical and transverse cutting equipment includes a second cutter, a second cutter driving wheel and a second chain rope, the second chain rope is passed through the second horizontal transverse cutting seam and upward around the cofferdam of the object to be cut, and then connected to the second cutter driving wheel to form a closed loop.

[0023] Step 7, perform segmented vertical and horizontal cutting of the cofferdam to be cut, start the second cutting machine, and use the second chain rope to perform segmented vertical and horizontal cutting of the cofferdam to be cut from bottom to top. During the cutting, insert a metal block into the second horizontal horizontal cutting seam or add a lifting device to the upper part of the cofferdam section to be cut until the cofferdam section to be cut is cut off, shut down the second cutting machine, and lift away the cut cofferdam section.

[0024] Repeat steps 4 to 5 to make a second horizontal transverse cut on the bottom of the cofferdam to be cut, and repeat steps 6 to 7 to make segmented vertical transverse cuts on the cofferdam to be cut (1) until the cofferdam to be cut is completely removed; wherein steps 6 and 7 can be performed simultaneously with step 5.

[0025] The present invention has the following outstanding substantive features and remarkable progress:

[0026] The method and steps for underwater concrete cofferdam cutting proposed in the present invention use the underwater concrete cofferdam cutting device of the present invention to solve the technical problem of fixing and winding the diamond chain around the concrete cofferdam to be cut, and is particularly suitable for cutting cofferdams with underwater parts, and has the advantages of simple equipment, easy operation and good implementation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the underwater concrete cofferdam cutting device of the present invention and the initial state of performing the first vertical transverse cutting.

[0028] Figure 2 for Figure 1 Right view of .

[0029] Figure 3 This is a schematic diagram of the final state of completing the first vertical transverse cutting of the present invention.

[0030] Figure 4 for Figure 3 Right view of .

[0031] Figure 5 This is a schematic diagram of the initial state of the second horizontal transverse cutting of the present invention.

[0032] Figure 6 It is a schematic diagram of the second horizontal transverse cutting in progress and the initial state of the segmented vertical transverse cutting according to the present invention.

[0033] Figure 7 It is a schematic diagram of the second horizontal transverse cutting in progress and the completion of one section of the segmented vertical transverse cutting according to the present invention.

[0034] Figure 8 , Fig. 9 This is a schematic diagram of the structure and installation of the universal lower sprocket of the double sprocket structure. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Example 1

[0037] refer to Figure 1 and Figure 2 An underwater concrete cofferdam cutting device includes a steel structure support, a cutting machine mainframe 4, a diamond chain rope 3 and a chain rope tension adjustment device, and a plurality of sprockets are arranged on the steel structure support.

[0038] The steel structure support includes an upper support frame and a lower support side frame 23: the upper support frame includes a horizontal frame 22 and a vertical frame 21 that are vertically connected to each other, the width of the vertical frame 21 is greater than the width of the cofferdam 1 of the object to be cut, and the two lower support side frames 23 are respectively connected to the two side edges of the upper support frame at flush ends, and the spacing between the two lower support side frames 23 is greater than the width of the cofferdam 1 of the object to be cut, one side of the lower support side frame 23 is flush with the end edge of the vertical frame 21 and constitutes the front end of the steel structure support. The lower support side frame 23 of this embodiment is an extension of the side frame of the vertical frame 21, and the end of the horizontal frame 22 away from the front end of the steel structure support is the rear end of the steel structure support.

[0039] The end of the vertical frame 21 away from the horizontal frame 22 is the upper end of the steel structure support, and the end of the lower support side frame 23 away from the horizontal frame 22 is the lower end of the lower support side frame.

[0040] Two sets of redirecting sprockets 31 are arranged on the horizontal frame 22 near the rear end of the steel structure support, upper sprockets 32 are arranged on both sides of the upper end of the steel structure support, and universal lower sprockets 33 are arranged at the ends of the lower support side frames 23. The universal lower sprockets 33 of this embodiment are double sprocket structures (such as Figure 8 ), the universal lower sprocket 33 is installed at the end of the lower supporting side frame 23 by an automatic steering bracket 330, and the automatic steering bracket 330 is provided with an auxiliary sprocket 34 beside the universal lower sprocket 33.

[0041] The diamond chain rope 3 can be connected to the driving wheel 41 of the cutting machine mainframe and form a closed loop through two sets of redirecting sprockets 31, two upper sprockets 32 and two universal lower sprockets 33 on the steel structure support and can be driven by the cutting machine mainframe 4.

[0042] The chain rope tension adjustment device of this embodiment includes a slide rail 51, an adjusting screw (not shown in the figure) and a chain rope adjustment motor 5. The adjusting screw connects the chain rope adjustment motor 5 to the cutting machine host 4. The cutting machine host 4 is installed on the slide rail 51. The chain rope adjustment motor 5 can drive the adjusting screw to move the cutting machine host 4 on the slide rail 51 to adjust the tension of the diamond chain rope 3.

[0043] Example 2

[0044] refer to Figures 1 to 7 , an underwater concrete cofferdam cutting method, using the underwater concrete cofferdam cutting device of embodiment 1 as the underwater concrete cofferdam cutting device, specifically comprising the following steps:

[0045] Step 1, install the underwater concrete cofferdam cutting equipment, fix the steel structure support, the cutting machine mainframe 4 and the chain rope tension adjustment device on the cofferdam 1 to be cut, so that the two lower support side frames 23 of the steel structure support are respectively located on both sides of the cofferdam 1 to be cut, and the lower end of the lower support side frame extends to the bottom of the cofferdam 1 to be cut, and the front end of the steel structure support is located near the cutting line of the cofferdam 1 to be cut (such as Figure 1and Figure 2 ).

[0046] Step 2, install the diamond chain rope, connect the diamond chain rope 3 to the driving wheel 41 of the main machine of the cutting machine, and form a closed loop through two sets of redirecting sprockets 31, two upper sprockets 32 and two universal lower sprockets 33 on the steel structure support. The diamond chain rope section between the two universal lower sprockets 33 crosses the vertical and horizontal cutting line of the cofferdam 1 to be cut (such as Figure 2 ).

[0047] Step 3, make the first vertical and horizontal cut on the cofferdam to be cut, start the cutting machine mainframe 4, make the diamond chain rope 3 make the first vertical and horizontal cut on the cofferdam 1 to be cut from top to bottom, and the chain rope tension adjustment device adjusts the tightness of the diamond chain rope 3 at the same time (in this embodiment, the chain rope adjustment motor 5 drives the adjustment screw to make the cutting machine mainframe 4 move backward on the slide rail 51, and the mainframe driving wheel 41 tightens the diamond chain rope 3). During the cutting operation, the diamond chain rope segment between the two universal lower sprockets 33 changes from an arc to a straight line, and finally cuts out the first vertical and horizontal cutting seam 11 (such as Figure 3 and Figure 4 ), shut down the cutting machine main unit 4 and the chain rope adjusting motor 5.

[0048] Step 4, move the cutting equipment, move the steel structure support, the cutting machine mainframe 4 and the chain rope tension adjustment device to the rear end of the steel structure support for a distance and fix them on the cofferdam 1 of the object to be cut. The equipment layout after the move is the same as step 1, and the installed diamond chain rope 3 moves with the equipment. The diamond chain rope segment between the two universal lower sprockets 33 passes through the first vertical transverse cutting seam 11 and horizontally crosses the horizontal transverse cutting line of the cofferdam 1 of the object to be cut (such as Figure 5 ), the universal lower sprocket 33 automatically turns (such as Fig. 9 ), the diamond chain rope 3 is wound around the auxiliary sprocket 34.

[0049] Step 5, a second horizontal transverse cut is made to the bottom of the cofferdam to be cut, the cutting machine mainframe 4 is started to make the diamond chain rope 3 make a second horizontal transverse cut to the cofferdam 1 to be cut, and the chain rope tension adjustment device adjusts the tightness of the diamond chain rope 3 at the same time (in this embodiment, the chain rope adjustment motor 5 drives the adjustment screw to make the cutting machine mainframe 4 move backward on the slide rail 51, and the mainframe driving wheel 41 tightens the diamond chain rope 3). When the cutting operation is in progress, the diamond chain rope segment between the two universal lower sprockets 33 changes from an arc to a straight line, and a second horizontal transverse cutting seam 12 is cut (such as Figure 6 ), shut down the cutting machine main unit 4 and the chain rope adjusting motor 5.

[0050] Step 6: Install a segmented vertical and horizontal cutting device on the cofferdam of the object to be cut. The segmented vertical and horizontal cutting device includes a second cutter 8, a second cutter driving wheel and a second chain rope 7. The second chain rope 7 passes through the second horizontal and horizontal cutting seam 12 and goes up around the cofferdam of the object to be cut 1 and is then connected to the second cutter driving wheel to form a closed loop (such as Figure 6 ).

[0051] Step 7, perform segmented vertical and horizontal cutting of the cofferdam of the object to be cut, start the second cutting machine 8, and use the second chain rope 7 to perform segmented vertical and horizontal cutting of the cofferdam 1 of the object to be cut from bottom to top. During the cutting, a metal block is inserted into the second horizontal horizontal cutting seam 12 or a lifting device is added to the upper part of the cofferdam section 10 of the object to be cut. In this embodiment, a lifting rope hole 101 is drilled near the upper end of the cofferdam section 10 of the object to be cut. The cofferdam sections 10 of the object to be cut are simultaneously lifted and tightened by a crane through the lifting rope hole 101 until the cofferdam sections 10 of the object to be cut are cut off, and the second cutting machine 8 is shut down to lift the cut cofferdam section 10 of the object to be cut away.

[0052] Repeat steps 4 to 5, make a second horizontal transverse cut on the bottom of the cofferdam 1 to be cut, extend the second horizontal transverse cutting seam 12, repeat steps 6 to 7, make segmented vertical transverse cuts on the cofferdam 1 to be cut, until the cofferdam 1 to be cut is completely removed; wherein steps 6 and 7 can be performed simultaneously with step 5.

Claims

1. An underwater concrete cofferdam cutting device, comprising a steel structure support, a cutting machine mainframe (4), a diamond chain rope (3) and a chain rope tension adjustment device, wherein a plurality of sprockets are arranged on the steel structure support, and characterized in that: The steel structure support comprises an upper support frame and a lower support side frame (23): the upper support frame comprises a horizontal frame (22) and a vertical frame (21) which are vertically connected to each other, the width of the vertical frame (21) is greater than the width of the cofferdam (1) of the object to be cut, the two lower support side frames (23) are respectively connected to the two side edges of the upper support frame at flush ends, the spacing between the two lower support side frames (23) is greater than the width of the cofferdam (1) of the object to be cut, one side of the lower support side frame (23) is flush with the end edge of the vertical frame (21) and constitutes the front end of the steel structure support, and the end of the horizontal frame (22) away from the front end of the steel structure support is the rear end of the steel structure support; The end of the vertical frame (21) away from the horizontal frame (22) is the upper end of the steel structure support, and the end of the lower support side frame (23) away from the horizontal frame (22) is the lower end of the lower support side frame; Two sets of redirecting sprockets (31) are arranged on the horizontal frame (22), upper sprockets (32) are arranged on both sides of the upper end of the steel structure support, and universal lower sprockets (33) are arranged on the ends of the lower supporting side frames (23); The diamond chain rope (3) can be connected to a driving wheel (41) of a main cutting machine and can form a closed loop through two sets of redirecting sprockets (31), two upper sprockets (32) and two universal lower sprockets (33) on a steel structure support and can be driven by a main cutting machine (4). The chain rope tension adjustment device has a chain rope adjustment motor and can adjust the tension of the diamond chain rope (3); The chain rope tension adjustment device comprises a slide rail (51), an adjustment screw and a chain rope adjustment motor (5); the adjustment screw connects the chain rope adjustment motor (5) to a cutting machine main machine (4); the cutting machine main machine (4) is mounted on the slide rail (51); the chain rope adjustment motor (5) can drive the adjustment screw to move the cutting machine main machine (4) on the slide rail (51) so as to adjust the tension of the diamond chain rope (3); The universal lower sprocket (33) is a double sprocket structure for preventing the rope from falling off.

2. The underwater concrete cofferdam cutting device according to claim 1, characterized in that: The chain rope tension adjustment device is attached to the cutting machine mainframe (4) or is separately arranged on the upper support frame, and the diamond chain rope (3) passes through the chain rope tension adjustment device.

3. An underwater concrete cofferdam cutting method, using an underwater concrete cofferdam cutting device, characterized in that: The underwater concrete cofferdam cutting equipment is the underwater concrete cofferdam cutting device according to claim 1 or 2, and comprises the following steps: Step 1, installing the underwater concrete cofferdam cutting equipment, fixing the steel structure support, the cutting machine main unit (4) and the chain rope tension adjustment device on the cofferdam (1) to be cut, so that the two lower support side frames (23) of the steel structure support are respectively located on both sides of the cofferdam (1) to be cut, and the lower ends of the lower support side frames are extended to the vicinity of the bottom of the cofferdam (1) to be cut, and the front end of the steel structure support is located near the cutting line of the cofferdam (1) to be cut; Step 2, installing the diamond chain rope, connecting the diamond chain rope (3) to the driving wheel (41) of the main machine of the cutting machine and forming a closed loop through two sets of redirecting sprockets (31), two upper sprockets (32) and two universal lower sprockets (33) on the steel structure support, and the diamond chain rope section between the two universal lower sprockets (33) crosses the vertical and horizontal cutting line of the cofferdam (1) of the object to be cut; Step 3, performing the first vertical and horizontal cutting on the cofferdam of the object to be cut, starting the cutting machine mainframe (4), causing the diamond chain rope (3) to perform the first vertical and horizontal cutting on the cofferdam of the object to be cut (1) from top to bottom, and the chain rope tension adjustment device simultaneously adjusts the tension of the diamond chain rope (3). During the cutting operation, the diamond chain rope section between the two universal lower sprockets (33) changes from an arc to a straight line, and finally cuts out the first vertical and horizontal cutting seam (11), and shuts down the cutting machine mainframe and the chain rope adjustment motor; Step 4, moving the cutting equipment, moving the steel structure support, the cutting machine mainframe (4) and the chain rope tension adjustment device toward the rear end of the steel structure support for a distance and fixing them on the cofferdam (1) of the object to be cut. The arrangement of the equipment after the movement is the same as that in step 1. The installed diamond chain rope (3) moves with the equipment, and the diamond chain rope section between the two universal lower sprockets (33) crosses the horizontal transverse cutting line of the cofferdam (1) of the object to be cut; Step 5, a second horizontal transverse cut is made to the bottom of the cofferdam of the object to be cut, the cutting machine mainframe (4) is started to make the diamond chain rope (3) make a second horizontal transverse cut to the cofferdam (1) of the object to be cut, and the chain rope tension adjustment device adjusts the tension of the diamond chain rope (3) at the same time. During the cutting operation, the diamond chain rope section between the two universal lower sprockets (33) changes from an arc to a straight line, and a second horizontal transverse cutting seam (12) is cut out, and the cutting machine mainframe and the chain rope adjustment motor are shut down; Step 6, installing a segmented vertical and transverse cutting device on the cofferdam of the object to be cut, the segmented vertical and transverse cutting device comprising a second cutter (8), a second cutter driving wheel and a second chain rope (7), passing the second chain rope (7) through the second horizontal transverse cutting seam (12) and upwardly surrounding the cofferdam of the object to be cut (1) and then connected to the second cutter driving wheel to form a closed loop; Step 7, cutting the cofferdam of the object to be cut vertically and horizontally in sections, starting the second cutting machine (8), so that the second chain rope (7) cuts the cofferdam of the object to be cut vertically and horizontally in sections from bottom to top, during the cutting, inserting a metal block into the second horizontal horizontal cutting seam (12) or adding a lifting device to the upper part of the cofferdam section (10) of the object to be cut until the cofferdam section (10) of the object to be cut is cut off, shutting down the second cutting machine (8), and lifting away the cut cofferdam section (10); Repeat steps 4 to 5 to make a second horizontal transverse cut on the bottom of the cofferdam (1) to be cut, and repeat steps 6 to 7 to make segmented vertical transverse cuts on the cofferdam (1) to be cut, until the cofferdam (1) to be cut is completely cut off and removed; wherein steps 6 and 7 can be performed simultaneously with step 5.

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