Cleaning method for framing concave joint of underground diaphragm wall

Abstract

The invention provides a method for cleaning a framing concave joint of an underground diaphragm wall, which belongs to the technical field of underground diaphragm wall cleaning and comprises the following steps: construction preparation: preparing materials and manufacturing a groove cleaner pile hammer; the punching type pile driver is in place, specifically, a winch punching type pile driver is installed, and the pile driver and a cleaning pile hammer are kept perpendicular; slurry is prepared, the height and concentration of wall protection slurry of original groove grabbing construction in the construction groove section are kept, the slurry concentration needs to be checked in the construction process, meanwhile, the slurry height is checked, and adjustment is conducted in time if changes exist; punching a groove by a pile hammer of a punching pile driver, wherein the pile hammer of the winch punching type pile driver is used for impacting and removing large soil, sand bags and concrete slurry leakage blocks in the groove of the wall body joint; a pile hammer of the punching pile machine is replaced with the pile hammer of the groove cleaner for joint cleaning; and groove cleaning is conducted, specifically, after joint cleaning and brushing work is completed, final groove cleaning is conducted on the underground diaphragm wall formed groove. According to the method, the punching pile machine pile hammer is firstly adopted for impact cleaning, then the groove cleaning device pile hammer is utilized for impact cleaning, through repeated cross operation, the purpose of cleaning up the joint groove is achieved, and the wall framing construction connection quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of underground continuous wall cleaning, in particular to a method for cleaning section concave joints of underground continuous walls. Background Art

[0002] As a foundation pit support technology, underground continuous wall has been widely used in deep foundation pit support projects and underground engineering construction. Grab-type trenching machines are often used in underground continuous wall construction to grab soil and form trenches. Generally, the wall section is divided into first and second phase wall construction with a length of 4 to 6 meters. During the trenching construction of the second phase wall of the underground continuous wall, the traditional construction method cannot completely remove the soil, sandbags, and concrete residues in the groove of the joint on the first phase wall. The poor quality of cleaning the joints of the underground continuous wall will directly affect the construction quality of the connection of the underground continuous wall section walls, and there is a great risk to the safety of the surrounding environment. Therefore, a cleaning method for the concave joints of the underground continuous wall sections is needed. Summary of the invention

[0003] The purpose of the present invention is to provide a method for cleaning concave joints of underground continuous wall sections, so as to solve the technical problem that the existing construction method cannot completely clean the concave joints of underground continuous wall sections. The cleaning method of the present invention transforms the old pile hammer of the punching pile driver into a groove cleaning device pile hammer, and uses the pile hammer of the punching pile driver and the pile hammer of the groove cleaning device to repeatedly cross-operate to clean the concave joints of the underground continuous wall sections, which can completely clean the soil, sandbags, concrete residues and rust on the surface of the steel plate in the groove of the underground continuous wall joint, ensure the connection quality of the wall section construction, and is worthy of promotion and application.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A method for cleaning concave joints of underground continuous wall sections, the cleaning method comprising the following steps:

[0006] Step 1: Construction preparation, including material preparation and making of the trench cleaner pile hammer;

[0007] Step 2: Put the punching pile driver in place, including installing the winch punching pile driver and keeping the pile driver and the cleaning pile hammer vertical;

[0008] Step 3: Prepare the mud, and maintain the height and concentration of the wall protection mud in the original grabbing trench construction in the construction trench section. During the construction process, the mud concentration should be checked, and the mud height should be checked at the same time. If there is any change, it should be adjusted in time;

[0009] Step 4: Punching piles with a pile hammer, using the pile hammer of the winch punching pile driver to impact and remove large pieces of soil, sandbags, and concrete leaking blocks in the groove of the wall joint;

[0010] Step 5: Use the trough cleaner hammer to clean the joint. Replace the pile hammer of the punching pile driver with the trough cleaner hammer to clean the joint.

[0011] Step 6: After the trench is cleaned and the joints are cleaned, the underground continuous wall trench is finally cleaned.

[0012] Furthermore, the material preparation in step 1 includes: selecting a pile hammer of a winch punching pile driver, a steel plate, a high-carbon steel wire rope, steel bars, and welding rods according to the width of the underground continuous wall.

[0013] Furthermore, the specific process of making the trough cleaner pile hammer in step 1 is: according to the joint width of the underground continuous wall, a trough cleaner box with an open upper end and a sealed lower end is made by welding steel plates, a wire rope brush is added to one end of the trough cleaner box, and a wire rope brush body is first assembled by welding steel plates and welded to the trough cleaner box, and then holes are punched on one end of the wire rope brush body and the side panel to fix the wire rope by welding, and the trough cleaner box with the wire rope brush is welded to the pile hammer of the winch punching pile driver to form a trough cleaner pile hammer.

[0014] Furthermore, the specific process of installing the winch punching pile driver in step 2 is: install the winch punching pile driver on the guide wall of the underground continuous wall, use the guide wall flange as the pile driver support surface, when the guide wall flange support does not meet the requirements, a steel plate can be added, and the center line of the pile driver is aligned with the center line of the underground continuous wall guide wall groove, keeping the pile driver and the pile hammer vertical.

[0015] Furthermore, the specific process of the punching pile driver pile hammer for impact cleaning in step 4 is: first, a winch-type punching pile driver pile hammer is used to perform free-fall grooving in the groove of the underground continuous wall joint, and the grooving is repeatedly performed from the top to the bottom of the groove section. The punching effect of the pile hammer is judged by the verticality of the up and down movement of the pile driver wire rope, and the grooving depth at the joint is judged by the release length of the winch wire rope and the measured depth of the measuring rope to meet the grooving depth requirement of the grooving machine.

[0016] Furthermore, the specific process of replacing the pile hammer of the punching pile driver in step 5 with the pile hammer of the slot cleaner is as follows:

[0017] Step a: After the pile hammer of the pile punching machine completes the slotting, the pile hammer is removed and the joint slot cleaning device pile hammer is installed;

[0018] Step b: After the joint cleaner pile hammer is installed, check and adjust the position of the punching pile driver and check the verticality of the cleaner pile hammer;

[0019] Step c: After the relevant work is prepared, the underground continuous wall joint groove is impacted, brushed and cleaned;

[0020] Step d: Cleaning of the joint groove:

[0021] Furthermore, the specific process of the joint groove cleaning operation in step d is as follows:

[0022] Step A: Use a winch punching pile driver, a pile hammer, a groove cleaner, and a pile hammer to perform free-fall flushing in the groove of the underground continuous wall joint;

[0023] Step B: The specific process of the flushing method in step A is: align one end of the wire rope brush of the trough cleaner pile hammer with the joint groove, and repeatedly flush from the top to the bottom of the joint groove, flushing each joint for no less than 30 times, until there is no mud on the wire rope brush of the trough cleaner pile hammer, and continue to flush for 3 to 5 times;

[0024] Step C: judging the wall brushing condition of the pile hammer of the slot cleaner by the verticality of the up and down movement of the steel wire rope of the pile driver, and judging the flushing effect by the free fall smoothness of the pile hammer of the slot cleaner;

[0025] Step D: When the grooving device pile hammer gets stuck or the verticality of the wire rope changes suddenly during the flushing process, the pile hammer of the punching pile driver can be replaced to flush the groove. After the flushing is completed, the grooving device pile hammer can be replaced to brush the joint wall. This process can be repeated and performed crosswise until the joint groove cleaning operation is finally completed.

[0026] Furthermore, the specific process of tank cleaning in step 6 is as follows: a tank forming machine is used to grab large pieces of sediment, and the remaining fine sediment can be cleaned by a mud processor using a mud reverse circulation method.

[0027] Furthermore, the cleaning device of the cleaning method comprises a punching pile driver and a cleaning pile hammer, and the cleaning pile hammer is connected to a winch of the punching pile driver through a pile driver wire rope.

[0028] Furthermore, the cleaning pile hammer is a punching pile driver hammer, which includes a first guide wall pile vertical body, the upper end of which is connected to the pile driver wire rope, and the lower end of which is provided with a first guide pile hammer tooth.

[0029] Furthermore, a first lifting lug is provided at the upper end of the vertical body of the first guide wall pile, the first lifting lug is connected to a steel wire rope of a pile driver, and a first wall hole is provided at the upper part of the vertical body of the first guide wall pile.

[0030] Furthermore, the cleaning pile hammer is a groove cleaner pile hammer, which includes a second guide wall pile hammer body and a groove cleaner, the upper end of the second guide wall pile hammer body is connected to the pile driver wire rope, the lower end of the second guide wall pile hammer body is connected to the groove cleaner, and the groove cleaner is provided with a plurality of connecting parts, one end of the connecting part is connected to the groove cleaner, and the other end of the connecting part is connected to one side of the upper part of the second guide wall pile hammer body.

[0031] Furthermore, the connecting piece is a reinforcing steel bar.

[0032] Furthermore, a second lifting lug is provided at the upper end of the second wall guide pile hammer body, the second lifting lug is connected to a steel wire rope of the pile driver, and a second wall hole is provided at the upper portion of the second wall guide pile hammer body.

[0033] Furthermore, the trench cleaning device includes a trench cleaning box and a wire rope brush, the second guide wall pile hammer is arranged inside the trench cleaning box, the bottom end of the trench cleaning box is provided with a second guide pile hammer tooth, and the wire rope brush is arranged on one end of the trench cleaning box.

[0034] Furthermore, a plurality of reinforcing transverse plates and a plurality of reinforcing vertical plates are arranged inside the tank cleaning box, the two ends of the reinforcing vertical plates are respectively connected to the inner side walls of the tank cleaning box, the reinforcing transverse plates are connected through the reinforcing vertical plates, and the two ends of the reinforcing transverse plates are respectively connected to the inner side walls of the tank cleaning box.

[0035] Furthermore, the trench cleaning box is configured as a box-type structure with an open upper end and a sealed lower end, the lower end of the second guide wall pile hammer is connected to the interior of the trench cleaning box, and the four corners of the trench cleaning box are connected to the upper part of the second guide wall pile hammer.

[0036] Furthermore, the wire rope brush comprises a wire rope brush body and a plurality of slot cleaning wire ropes, one end of the wire rope brush body is connected to a slot cleaning box, and the slot cleaning wire ropes are respectively arranged at the other end and both sides of the wire rope brush body.

[0037] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0038] 1. The cleaning method of the present invention is powered by a punching pile driver. The pile hammer of the punching pile driver is first used to impact and remove large pieces of soil, sandbags, and concrete leakage blocks in the groove of the wall joint. Then, the groove cleaner pile hammer is used to impact and clean the joint groove. The pile hammer of the punching pile driver and the pile hammer of the groove cleaner are used to repeatedly cross-operate to clean the concave joints of the underground continuous wall sections, thereby achieving the purpose of cleaning the joint grooves and ensuring the connection quality of the wall section construction. The method is worthy of popularization and application.

[0039] 2. When cleaning the concave joints of underground continuous walls, the present invention can alternately replace the joint groove cleaning device pile hammer and the punching pile driver pile hammer on the same punching pile driver to perform the joint groove flushing and wall brushing cleaning operation. It has a simple structure, is easy to operate, and can improve construction efficiency.

[0040] 3. Compared with the trenching machine grab bucket and the traditional punch pile driver hammer trenching joint method, the cleaning method of the present invention has the characteristics of fast speed, high efficiency and thorough wall brushing. It has a small working radius and reduces the auxiliary operation time increased by replacing construction machinery and process conversion. It can be widely used in foundation pit support projects using cast-in-place underground continuous wall construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic flow diagram of the cleaning method of the present invention;

[0042] Figure 2 It is a schematic diagram of using a pile hammer of a punching pile driver to punch a groove in the present invention;

[0043] Figure 3 It is a front view of the pile hammer of the punching pile machine of the present invention;

[0044] Figure 4 It is a schematic diagram of the present invention using a groove cleaner pile hammer to clean the brush joint;

[0045] Figure 5 is a front view of the pile hammer of the slot cleaner of the present invention;

[0046] Figure 6 It is a top view of the trench cleaner pile hammer of the present invention.

[0047] In the accompanying drawings, 1-punching pile driver, 2-pile driver wire rope, 3-punching pile driver hammer, 31-first guide wall pile vertical body, 32-first lifting ear, 33-first wall hole, 34-first guide pile hammer tooth, 4-groove cleaning device hammer, 41-second guide wall pile hammer body, 42-groove cleaning device, 421-groove cleaning box body, 422-wire rope brush, 423-second guide pile hammer tooth, 424-reinforced horizontal plate, 425-reinforced vertical plate, 426-wire rope brush body, 427-groove cleaning wire rope, 43-connecting piece, 44-second lifting ear, 45-second wall hole, 5-winch. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0049] like Figure 1 As shown, a method for cleaning concave joints of underground continuous wall sections, the cleaning method comprises the following steps:

[0050] The trench section is being constructed behind the underground continuous wall. The trenching machine has preliminarily completed the trenching operation, and the trench section is adequately equipped with mud. There are no obstacles on the construction surface that affect the operation of the bored pile driver, and the personnel, machinery and materials required for the construction are in place.

[0051] Step 1: Construction preparation,

[0052] Step 1.1: Material preparation: Select the pile hammer of the winch punching pile driver, steel plate, high carbon steel wire rope, steel bars, and welding rods according to the width of the underground continuous wall.

[0053] Specifically, you can choose two pile hammers of the old winch punching pile driver (the diameter is selected according to the width of the underground continuous wall), Q235 steel plate with thickness of 50mm, 30mm, and 10mm, A8 diameter 6x37 high carbon steel wire rope, A20 steel bar, and J422 welding rod.

[0054] Step 1.2: Make a trench cleaner pile hammer: According to the joint width of the underground continuous wall, use steel plates to weld a trench cleaner box with an open upper end and a sealed lower end. Add a wire rope brush at one end of the trench cleaner box. First, use steel plates to weld and assemble the wire rope brush body and weld it to the trench cleaner box. Then, drill holes at one end of the wire rope brush body and the side panel to weld and fix the wire rope. Weld the trench cleaner box with a wire rope brush to the pile hammer of the winch punching pile driver to form a trench cleaner pile hammer.

[0055] Specifically, the slot cleaning box is welded and assembled with 50mm thick Q235 steel plates, which can be welded and connected with the old pile hammer; the wire rope brush structure is welded and assembled with 30mm thick Q235 steel plates, which can be welded and connected with the slot cleaning box; the wire rope brush uses 8mm-6x37 high carbon steel wire rope, and the wire rope is installed and fixed by drilling holes on the upper side plate of the wire rope brush structure; the diameter and width of the pile hammer, slot cleaning box, wire rope brush and other structures are determined according to the width of the underground continuous wall and the width of the joint groove. The slot cleaning pile hammer can be modified and manufactured on site using the old pile hammer according to the width of the underground continuous wall and the joint form; the old pile hammer of the punching pile driver is transformed into a slot cleaning pile hammer, and a slot cleaning box with a wire rope brush is welded on the old pile cone, and a hole is drilled on the side with the wire rope brush to install the wire rope to make a slot cleaning pile hammer.

[0056] Step 2: Put the punching pile driver in place, install the winch punching pile driver on the guide wall of the underground continuous wall, use the guide wall flange as the support surface of the pile driver, when the guide wall flange support does not meet the requirements, add a steel plate, align the center line of the pile driver with the center line of the underground continuous wall guide groove, and keep the pile driver and pile hammer vertical.

[0057] Step 3: Prepare the mud, and maintain the height and concentration of the wall protection mud in the original grabbing trench construction in the construction trench section. During the construction process, the mud concentration should be checked, and the mud height should be checked at the same time. If there is any change, it should be adjusted in time;

[0058] Step 4: Punching grooves with the pile hammer of the punching pile driver. First, use the pile hammer of the winch-type punching pile driver to perform free-fall punching in the groove of the underground continuous wall joint. Punch grooves repeatedly from the top to the bottom of the groove section. The punching effect of the pile hammer is judged by the verticality of the up and down movement of the pile driver's wire rope. The release length of the winch wire rope and the depth measured by the measuring rope are used to judge whether the punching depth at the joint meets the groove grabbing depth requirement of the groove grabbing machine.

[0059] Step 5: Use the trough cleaner hammer to clean the joint. Replace the pile hammer of the punching pile driver with the trough cleaner hammer to clean the joint:

[0060] Step 5.1: The specific process of replacing the pile hammer of the punching pile driver with the pile hammer of the slot cleaner is as follows:

[0061] Step a: After the pile hammer of the pile punching machine completes the slotting, the pile hammer is removed and the joint slot cleaning device pile hammer is installed;

[0062] Step b: After the joint cleaner pile hammer is installed, check and adjust the position of the punching pile driver and check the verticality of the cleaner pile hammer;

[0063] Step c: After the relevant work is prepared, the underground continuous wall joint groove is impacted, brushed and cleaned;

[0064] Step d: Cleaning of the joint groove:

[0065] Step 5.2: The specific process of cleaning the joint groove is as follows:

[0066] Step A: Use a winch punching pile driver, a pile hammer, a groove cleaner, and a pile hammer to perform free-fall flushing in the groove of the underground continuous wall joint;

[0067] The trough cleaner pile hammer is connected to the pile driver wire rope of the punching pile driver to form a mechanical kinetic energy combination. The trough cleaner pile hammer is lifted by the winch, and the trough cleaner pile hammer's own weight is used for free fall motion to repeatedly impact and clean the underground continuous wall joints to achieve the cleaning purpose.

[0068] Step B: The specific process of the flushing method in step A is: align one end of the wire rope brush of the trough cleaner pile hammer with the joint groove, and repeatedly flush from the top to the bottom of the joint groove, flushing each joint for no less than 30 times, until there is no mud on the wire rope brush of the trough cleaner pile hammer, and continue to flush for 3 to 5 times;

[0069] Replace the pile hammer of the punching pile driver with the pile hammer of the joint cleaner to flush the joint groove, so as to effectively remove the dirt, sandbags, concrete leakage residues and other residues in the wall joint groove. At the same time, the wire rope brush on the pile hammer of the joint cleaner repeatedly rubs against the side of the wall joint groove to achieve the cleaning effect.

[0070] Step C: judging the wall brushing condition of the pile hammer of the slot cleaner by the verticality of the up and down movement of the steel wire rope of the pile driver, and judging the flushing effect by the free fall smoothness of the pile hammer of the slot cleaner;

[0071] Step D: When the grooving device pile hammer gets stuck or the verticality of the wire rope changes suddenly during the flushing process, the pile hammer of the punching pile driver can be replaced to flush the groove. After the flushing is completed, the grooving device pile hammer can be replaced to brush the joint wall. This process can be repeated and performed crosswise until the joint groove cleaning operation is finally completed.

[0072] Step 6: After the cleaning of the trench and the brushing of the joints are completed, the underground continuous wall trench is finally cleaned. A trenching machine is used to grab large pieces of sediment, and the remaining fine sediment can be cleaned by a mud processor using the mud reverse circulation method.

[0073] like Figure 2-3 As shown, the cleaning device of the cleaning method includes a punching pile driver 1 and a cleaning pile hammer, and the cleaning pile hammer is connected to the winch 5 of the punching pile driver 1 through the pile driver wire rope 2. The cleaning pile hammer is a punching pile driver hammer 3, and the punching pile driver hammer 3 includes a first guide wall pile pendant 31, the upper end of the first guide wall pile pendant 31 is connected to the pile driver wire rope 2, and the lower end of the first guide wall pile pendant 31 is provided with a first guide pile hammer tooth 34. The upper end of the first guide wall pile pendant 31 is provided with a first lifting lug 32, and the first lifting lug 32 is connected to the pile driver wire rope 2. The first lifting lug 32 facilitates the connection between the punching pile driver hammer and the pile driver wire rope. The upper part of the first guide wall pile pendant 31 is provided with a first wall hole 33, which can reduce the weight of the punching pile driver hammer itself.

[0074] like Figure 4-6 As shown, the cleaning pile hammer is a slot cleaner pile hammer 4, which includes a second guide wall pile hammer body 41 and a slot cleaner 42. The upper end of the second guide wall pile hammer body 41 is connected to the pile driver wire rope 2, and the lower end of the second guide wall pile hammer body 41 is connected to the slot cleaner 42. The slot cleaner 42 is provided with a plurality of connecting members 43, one end of the connecting member 43 is connected to the slot cleaner 42, and the other end of the connecting member 43 is connected to one side of the upper part of the second guide wall pile hammer body 41. The connecting member 4 is a reinforcing steel bar, and the reinforcing steel bar is provided to strengthen the stability of the connection between the slot cleaner and the second guide wall pile hammer body. The upper end of the second guide wall pile hammer body 41 is provided with a second lifting lug 44, and the second lifting lug 44 is connected to the pile driver wire rope 2. The second lifting lug is provided to facilitate the lifting of the slot cleaner pile hammer. The upper part of the second guide wall pile hammer body 41 is provided with a second wall hole 45, and the weight of the slot cleaner pile hammer itself can be reduced by providing the second wall hole.

[0075] The slot cleaning device 42 includes a slot cleaning box 421 and a wire rope brush 422. The second guide wall pile hammer body 41 is arranged inside the slot cleaning box 421. The bottom end of the slot cleaning box 421 is provided with a second guide pile hammer tooth 423. The wire rope brush 422 is arranged on one end of the slot cleaning box 421. The wire rope brush 422 is fixed to the slot cleaning box 421 by welding. A plurality of reinforcing transverse plates 424 and a plurality of reinforcing vertical plates 425 are arranged inside the slot cleaning box 421. The two ends of the reinforcing vertical plates 425 are respectively connected to the inner side walls of the slot cleaning box 421. The reinforcing transverse plates 424 are connected through the reinforcing vertical plates 425, and the two ends of the reinforcing transverse plates 424 are respectively connected to the inner side walls of the slot cleaning box 421. The strength of the slot cleaning box 421 is enhanced by providing the reinforcing transverse plates 424 and the reinforcing vertical plates 425. The slot cleaning box 421 is configured as a box-type structure with an open upper end and a sealed lower end. The lower end of the second guide wall pile hammer body 41 is connected to the inside of the slot cleaning box 421, and the four corners of the slot cleaning box 421 are connected to the upper part of the second guide wall pile hammer body 41. The slot cleaning box 421 can be assembled by welding with a 50mm thick Q235 steel plate and fixed by welding to the second guide wall pile hammer body 41. The wire rope brush 422 includes a wire rope brush body 426 and a plurality of slot cleaning wire ropes 427. One end of the wire rope brush body 426 is connected to the slot cleaning box 421, and the slot cleaning wire ropes 427 are respectively arranged at the other end and both sides of the wire rope brush body 426. The wire rope brush body can be assembled by welding 30mm thick Q235 steel plate and fixed to the slot cleaning box body. The slot cleaning wire rope can be 8mm-6x37 high carbon steel wire rope. The wire rope is fixed by punching holes on the upper side plate of the wire rope brush body.

[0076] The operating points of the cleaning method of the present invention include the following aspects:

[0077] 1. Strictly control the position of the punching pile driver and the verticality of the pile hammer to ensure that the center lines of the pile driver and pile hammer are aligned with the center line of the slot width and the center line of the joint groove;

[0078] 2. The pile hammer of the punching pile driver needs to repeatedly perform free fall motion to punch the grooves, and the release amount of the wire rope stroke for each punching pile must be released in place at one time;

[0079] 3. Each time the pile hammer of the punching pile machine is lifted, the bottom of the pile hammer must be embedded 300mm below the top of the slot and then punch the slot downwards;

[0080] 4. The pile hammer of the punching pile driver needs to repeatedly perform free fall motion to impact the wall, and the wire rope release amount of the wall-brushing winch must be released in place at one time each time;

[0081] 5. During each flushing operation, the height of the pile hammer of the slot cleaner should be ensured to be 300mm below the bottom of the joint groove and start to impact the wall downwards;

[0082] 6. During the flushing operation, ensure that the pile hammer with the wire rope brush is aligned with the joint groove for flushing to ensure the joint wall brushing effect;

[0083] 7. When flushing the joint, the wire rope end of the punching pile machine needs to be horizontally offset to the joint direction by a certain distance, the center of the groove width direction needs to be aligned, and the wire rope brush of the groove cleaner pile hammer needs to be in contact with the wall of the joint groove to ensure the wall brushing effect;

[0084] 8. The number of times the trough cleaner hammer repeatedly flushes the joints should be continuous and uninterrupted, ensuring that each joint has high-quality wall brushing times of not less than 30 times. The trough cleaner hammer continues to flush 3 to 5 times after the sludge is removed;

[0085] 9. If the flushing is not smooth or the flushing cannot reach the groove depth during the wall brushing process, a groove grabbing machine can be used to grab the groove, and then a punching pile driver can be used to flush the joint groove, and then a groove cleaning device pile hammer can be used to flush the groove and brush the wall;

[0086] 10. During the operations of grooving, flushing and wall brushing, the concentration and position of the wall protection mud need to be checked, and any abnormalities need to be adjusted in time.

[0087] In the cleaning method of the present invention, the punching pile driver provides power, and the pile hammer of the punching pile driver is first used to impact and remove large pieces of soil, sandbags, and concrete leakage blocks in the groove of the wall joint, and then the groove cleaner pile hammer is used to impact and clean the joint groove, and the punching pile driver pile hammer and the groove cleaner pile hammer are used to repeatedly cross-operate to clean the underground continuous wall section concave joints, thereby achieving the purpose of cleaning the joint grooves; when the present invention is cleaning the concave joints of the underground continuous wall, the joint groove cleaner pile hammer and the punching pile driver pile hammer can be alternately replaced on the same punching pile driver to perform joint groove flushing and wall brushing cleaning operations; compared with the groove forming machine grab and the traditional punching pile driver pile hammer groove joint cleaning method, the cleaning method of the present invention has the characteristics of fast speed, high efficiency, and thorough wall brushing, and its working radius is small, which reduces the auxiliary operation time increased by replacing construction machinery and process conversion, and can be widely used in foundation pit support projects using cast-in-place underground continuous wall construction.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for cleaning concave joints of underground continuous wall sections, characterized by: The cleaning method comprises the following steps: Step 1: Construction preparation, including material preparation and making of the trench cleaner pile hammer; Step 2: Put the punching pile driver in place, including installing the winch punching pile driver and keeping the pile driver and the cleaning pile hammer vertical; Step 3: Prepare the mud, and maintain the height and concentration of the wall protection mud in the original grabbing trench construction in the construction trench section. During the construction process, the mud concentration should be checked, and the mud height should be checked at the same time. If there is any change, it should be adjusted in time; Step 4: Punching piles with a pile hammer, using the pile hammer of the winch punching pile driver to impact and remove large pieces of soil, sandbags, and concrete leaking blocks in the groove of the wall joint; Step 5: Use the trough cleaner hammer to clean the joint. Replace the pile hammer of the punching pile driver with the trough cleaner hammer to clean the joint. Step 6: After the trench is cleaned and the joints are cleaned, the underground continuous wall trench is finally cleaned.

2. A method for cleaning concave joints of underground continuous wall sections according to claim 1, characterized in that: The material preparation in step 1 includes: selecting the pile hammer of the winch punching pile driver according to the width of the underground continuous wall, steel plates, high carbon steel wire ropes, steel bars, and welding rods.

3. A method for cleaning concave joints of underground continuous wall sections according to claim 1, characterized in that: The specific process of making the trough cleaner pile hammer in step 1 is as follows: according to the joint width of the underground continuous wall, a trough cleaner box with an open upper end and a sealed lower end is made by welding steel plates, a wire rope brush is added to one end of the trough cleaner box, and a wire rope brush body is first assembled by welding steel plates and connected by welding to the trough cleaner box. Then, holes are punched on one end of the wire rope brush body and the side panel to fix the wire rope by welding. The trough cleaner box with the wire rope brush is welded to the pile hammer of the winch punching pile driver to form a trough cleaner pile hammer.

4. A method for cleaning concave joints of underground continuous wall sections according to claim 1, characterized in that: The specific process of installing the winch punching pile driver in step 2 is: install the winch punching pile driver on the guide wall of the underground continuous wall, use the guide wall flange as the pile driver support surface, when the guide wall flange support does not meet the requirements, add a steel plate, align the center line of the pile driver with the center line of the underground continuous wall guide wall groove, and keep the pile driver and pile hammer vertical.

5. The method for cleaning concave joints of underground continuous wall sections according to claim 1, characterized in that: The specific process of impact cleaning by the pile hammer of the punching pile driver in step 4 is as follows: first, the winch-type punching pile driver pile hammer is used to perform free-fall grooving in the groove of the underground continuous wall joint, and the grooving is repeatedly performed from the top to the bottom of the groove section. The punching effect of the pile hammer is judged by the verticality of the up and down movement of the pile driver's wire rope, and the depth of the grooving at the joint is judged by the release length of the winch wire rope and the measured depth of the measuring rope to meet the grooving depth requirement of the grooving machine.

6. A method for cleaning concave joints of underground continuous wall sections according to claim 1, characterized in that: The specific process of replacing the pile hammer of the punching pile driver in step 5 with the pile hammer of the slot cleaner is as follows: Step a: After the pile hammer of the pile punching machine completes the slotting, the pile hammer is removed and the joint slot cleaning device pile hammer is installed; Step b: After the joint cleaner pile hammer is installed, check and adjust the position of the punching pile driver and check the verticality of the cleaner pile hammer; Step c: After the relevant work is prepared, the underground continuous wall joint groove is impacted, brushed and cleaned; Step d: Cleaning of the joint groove.

7. A method for cleaning concave joints of underground continuous wall sections according to claim 6, characterized in that: The specific process of the joint groove cleaning operation in step d is as follows: Step A: Use a winch punching pile driver, a pile hammer, a groove cleaner, and a pile hammer to perform free-fall flushing in the groove of the underground continuous wall joint; Step B: The specific process of the flushing method in step A is: align one end of the wire rope brush of the trough cleaner pile hammer with the joint groove, and repeatedly flush from the top to the bottom of the joint groove, flushing each joint for no less than 30 times, until there is no mud on the wire rope brush of the trough cleaner pile hammer, and continue to flush for 3 to 5 times; Step C: judging the wall brushing condition of the pile hammer of the slot cleaner by the verticality of the up and down movement of the steel wire rope of the pile driver, and judging the flushing effect by the free fall smoothness of the pile hammer of the slot cleaner; Step D: When the grooving device pile hammer gets stuck or the verticality of the wire rope changes suddenly during the flushing process, the pile hammer of the punching pile driver can be replaced to flush the groove. After the flushing is completed, the grooving device pile hammer can be replaced to brush the joint wall. This process can be repeated and performed crosswise until the joint groove cleaning operation is finally completed.

8. The method for cleaning concave joints of underground continuous wall sections according to claim 1, characterized in that: The specific process of tank cleaning in step 6 is as follows: a tank forming machine is used to grab large pieces of sediment during tank cleaning, and the remaining fine sediment can be cleaned by a mud processor using a mud reverse circulation method.

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