Positioning and protection device for embedded steel bar coupler of diaphragm wall and its construction method

Abstract

The present invention discloses a positioning and protection device for an embedded steel bar connector of a diaphragm wall and its construction method, including: a positioner which is arranged outside the embedded steel bar connector to position the embedded steel bar connector; a positioning bottom plate which is welded to the transverse reinforcement of the diaphragm wall, and the embedded steel bar connector and the positioner are installed on the positioning bottom plate, and the anchor bars of the diaphragm wall penetrate through the positioning bottom plate to be connected with the embedded steel bar connector; steel side plates which are arranged on both sides of the positioner to protect the positioner; a steel cover which is arranged on the top of the embedded steel bar connector, the positioner and the steel side plates; the bottom of the steel side plates is connected to the positioning bottom plate, and the top of the steel side plates is connected to the steel cover. A first bolt hole is reserved on the steel cover, and a first bolt passes through the first bolt hole on the steel cover and is threadedly connected with the embedded steel bar connector. The problems that the thread teeth of the embedded steel bar connector are damaged by chiseling, rusted, the positioning is uneven in height and skewed during the construction process, resulting in unusability, are solved.

Description

Technical Field

[0001] The invention belongs to the field of building construction and relates to a positioning and protection device for embedded steel bar connectors in diaphragm walls and a construction method thereof. Background Art

[0002] At present, diaphragm walls are generally used as the retaining structures for deep foundation pits of underground stations. During the construction of underground stations, in order to ensure reliable connection between each floor slab and the diaphragm wall, the commonly adopted solution is to embed steel bar connectors in the diaphragm wall to achieve the connection between the diaphragm wall and the main structure of the station. The main structure load of the station is transmitted to the bearing stratum through the steel bar connectors on the diaphragm wall, undertaking the tasks of transmitting the ground construction load, the self-weight of the floor slab and the beam-column joints.

[0003] During the actual construction process, problems such as uneven positioning height, skew of multiple embedded steel bar connectors, and damage and corrosion of the threads of the embedded steel bar connectors are common. The above problems will cause the embedded steel bar connectors to be unusable, resulting in the main structure of the underground station being unable to transmit the load to the diaphragm wall, which may cause cracks, leakage, etc. in the main structure of the station, thus affecting the service life of the underground station. At present, the construction party often uses the method of post-inserted bars to solve the problem that the main structure of the underground station cannot transmit the load to the diaphragm wall because the embedded steel bar connectors are damaged and unusable, but the method of post-inserted bars increases the construction cost. Summary of the Invention

[0004] The purpose of the embodiment of the invention is to provide a positioning and protection device for embedded steel bar connectors in diaphragm walls to solve the common problems in the construction process, such as uneven positioning height, skew of the embedded steel bar connectors, and damage and corrosion of the threads of the embedded steel bar connectors, resulting in their unusability.

[0005] Another purpose of the embodiment of the invention is to provide a construction method for the positioning and protection device for embedded steel bar connectors in diaphragm walls.

[0006] The technical solution adopted in the embodiment of the invention is as follows: The positioning and protection device for embedded steel bar connectors in diaphragm walls includes:

[0007] A positioner which is arranged outside the embedded steel bar connector to position the embedded steel bar connector;

[0008] A positioning base plate which is welded to the transverse bars of the diaphragm wall. The embedded steel bar connector and the positioner are installed on the positioning base plate, and the anchor bars of the diaphragm wall penetrate through the positioning base plate and are connected to the embedded steel bar connector;

[0009] Steel side plates which are arranged on both sides of the positioner to protect the positioner;

[0010] Steel cover, which is arranged on the top of the embedded steel bar coupler, positioner and steel side plate;

[0011] The bottom of the steel side plate is connected to the positioning bottom plate, and the top of the steel side plate is connected to the steel cover.

[0012] Furthermore, on the positioning bottom plate, a first steel side plate limiting groove, diaphragm wall anchor bar holes, a first coupler limiting hole and a first positioner limiting groove are reserved;

[0013] On the steel cover, a first bolt hole, a second steel side plate limiting groove, a second positioner limiting groove and a second coupler limiting hole are reserved;

[0014] The bottom of the embedded steel bar coupler is arranged in the corresponding first coupler limiting hole, and the top is arranged in the corresponding second coupler limiting hole;

[0015] The bottom of the steel side plate is arranged in the first steel side plate limiting groove, and the top is arranged in the second steel side plate limiting groove;

[0016] The bottom of the positioner is arranged in the corresponding first positioner limiting groove, and the top is arranged in the corresponding second positioner limiting groove;

[0017] The diaphragm wall anchor bar passes through the diaphragm wall anchor bar hole and is connected to the embedded steel bar coupler in the corresponding first coupler limiting hole;

[0018] The first bolt passes through the first bolt hole on the steel cover and is threadedly connected to the embedded steel bar coupler, connecting the embedded steel bar coupler, the positioning bottom plate, the steel side plate, the positioner and the steel cover into one body.

[0019] Furthermore, a plurality of embedded steel bar couplers are installed on the positioning bottom plate;

[0020] The steel side plate is arranged on both sides of a plurality of positioners;

[0021] The steel cover is installed on the top of a plurality of positioners and embedded steel bar couplers;

[0022] A plurality of first bolt holes are opened on the steel cover, and a plurality of first bolts are respectively connected to a plurality of embedded steel bar couplers through the corresponding first bolt holes.

[0023] Furthermore, the center positions of the nut and the screw of the first bolt are of a hollow structure;

[0024] A positioner is placed in the hollow structures of the nut and the screw;

[0025] The first bolt hole is composed of a first screw hole and a nut hole, and a detachable bolt protection cover is arranged at the orifice of the nut hole;

[0026] The diameter of the anchor bar hole of the diaphragm wall is the same as that of the anchor bar of the diaphragm wall, and the center of the first coupler limiting hole coincides with the center of the anchor bar hole of the diaphragm wall;

[0027] The second steel side plate limiting groove, the second locator limiting groove and the second coupler limiting hole are all located inside the steel cover, and the nut hole is located outside the steel cover;

[0028] The second coupler limiting hole communicates with the nut hole through the first screw hole, and the centers of the first screw hole, the nut hole and the second coupler limiting hole coincide.

[0029] Furthermore, each of the embedded steel bar couplers is surrounded by two detachable locators;

[0030] The locators of two adjacent embedded steel bar couplers on the positioning bottom plate are detachably connected.

[0031] Furthermore, L-shaped locator flanks are respectively arranged at the joints of the two locators of each of the embedded steel bar couplers, and second bolt holes are reserved on both plates forming the L shape of each locator flank;

[0032] The locator flanks of the two locators of each of the embedded steel bar couplers are detachably connected by second bolts matching the second bolt holes;

[0033] The locator flanks of two adjacent locators are detachably connected by second bolts matching the second bolt holes.

[0034] Furthermore, a third locator limiting groove corresponding to the locator flanks of multiple locators is reserved on one side of the steel side plate close to the locator;

[0035] The third locator limiting groove is snap-fitted with the locator flanks of the locator.

[0036] Furthermore, an inflatable airbag is arranged between multiple locators and the steel side plate, and two adjacent inflatable airbags are communicated;

[0037] An external inflatable nozzle penetrating the steel side plate is arranged on each of the inflatable airbags, and a detachable rubber protection plug is arranged on the external inflatable nozzle.

[0038] The technical solution adopted in the embodiment of the present invention is: the construction method of the positioning and protection device for the embedded steel bar coupler of the diaphragm wall as described above, including the following steps:

[0039] Step S1: Determine the specification model and layout spacing of the embedded steel bar couplers. Along the layout direction of the embedded steel bar couplers, mark the positions of the diaphragm wall anchor bars connected to one end of the embedded steel bar couplers on the positioning base plate, and drill holes on the positioning base plate according to the diameter of the diaphragm wall anchor bars to form diaphragm wall anchor bar holes;

[0040] Step S2: Continuously drill holes on the basis of the diaphragm wall anchor bar holes according to the outer diameter of the embedded steel bar couplers to form the first coupler limiting holes. Determine the thickness of the positioner, and reserve the first positioner limiting groove along the edge of the positioner on the inner side of the positioning base plate;

[0041] Step S3: Determine the thickness of the steel side plate, and reserve the first steel side plate limiting grooves at symmetric positions on the positioning base plate;

[0042] Step S4: According to the thickness of the positioner wings of the positioner, groove the third positioner limiting groove on the inner side of the steel side plate, and the grooving direction is perpendicular to the positioning base plate;

[0043] Step S5: Determine the specification model of the first bolt. According to the position of the center of the inner hole of the embedded steel bar coupler, drill holes on the corresponding position of the steel cover according to the diameter of the screw rod of the first bolt to form the first screw rod holes, and the opening depth of the first screw rod holes is equal to the thickness of the steel cover;

[0044] Step S6: Continuously drill holes at the outside of the steel cover of the first screw rod holes according to the diameter of the nut of the first bolt to form nut holes, and the opening depth is equal to the sum of the height of the nut of the first bolt and the thickness of the bolt protection cover;

[0045] Step S7: Reserve the second steel side plate limiting grooves at symmetric positions on the inner side of the steel cover, and the second steel side plate limiting grooves correspond to the first steel side plate limiting grooves on the positioning base plate;

[0046] Step S8: Reserve the second positioner limiting grooves along the edge of the positioner on the inner side of the steel cover, and the second positioner limiting grooves correspond to the first positioner limiting grooves on the positioning base plate;

[0047] Step S9: Assemble the positioning and protection device of the diaphragm wall embedded steel bar coupler to complete the installation construction of the positioning and protection device of the diaphragm wall embedded steel bar coupler.

[0048] Further, the specific process of Step S9 is as follows:

[0049] First, pass the positioning base plate through the diaphragm wall anchor bars through the diaphragm wall anchor bar holes, and weld the positioning base plate to the diaphragm wall transverse bars;

[0050] Then, the embedded steel bar couplers and positioners are installed in sequence. Two adjacent positioners are connected by the second bolts. After all the positioners are connected, it is necessary to ensure that all the embedded steel bar couplers are on the same horizontal line, and it is also necessary to ensure that the embedded steel bar couplers and positioners are completely snapped into the corresponding first coupler limit holes and first positioner limit grooves;

[0051] Next, the steel side plates are installed. After the installation is completed, it is necessary to ensure that the two steel side plates are completely embedded in the corresponding first steel side plate limit grooves, and it is also necessary to ensure that the positioner wings of the positioners are snapped into the corresponding third positioner limit grooves;

[0052] Finally, the steel cover is installed. After ensuring that the embedded steel bar couplers, positioners, and steel side plates are completely embedded in the corresponding second coupler limit holes, second positioner limit grooves, and second steel side plate limit grooves, the first bolt with the positioner placed on it is screwed in and the bolt protection cover is covered;

[0053] In step S4, along the layout direction of the third positioner limit grooves, the widths of the first and the last third positioner limit grooves are both equal to the thickness of the positioner wings of the positioner, and the widths of the remaining third positioner limit grooves are equal to twice the thickness of the positioner wings of the positioner.

[0054] The beneficial effects of the embodiments of the present invention are as follows:

[0055] 1. A stable steel support structure composed of positioners, steel side plates, steel covers, etc. is formed around the embedded steel bar couplers to bear the load from underwater concrete, avoiding the direct load on the embedded steel bar couplers, and at the same time avoiding damage to the embedded steel bar couplers during the subsequent chiseling of the diaphragm wall; by driving the first bolt into the embedded steel bar coupler, it is avoided that the concrete enters the inner side of the embedded steel bar coupler during the pouring of underwater concrete for the diaphragm wall, causing damage and corrosion to the threads of the embedded steel bar coupler, improving the survival rate of the embedded steel bar coupler, avoiding the need for post-implantation reinforcement due to the inability to use the embedded steel bar coupler normally in the later stage, saving a large amount of manpower, material resources and financial resources; solving the problem that the threads of the embedded steel bar coupler are chiseled and corroded during the construction process and cannot be used;

[0056] 2. By setting positioners around the embedded steel bar couplers, it is avoided that the embedded steel bar couplers deviate in angle or elevation due to collision with the groove wall during the hoisting of the diaphragm wall reinforcement cage, solving the common problem in the construction process that the positioning of the embedded steel bar couplers is uneven in height and skewed and cannot be used;

[0057] 3. The device is made of steel and has high self-strength. When pouring underwater concrete, it can utilize the multi-point simply supported characteristics of the steel side plates by the positioner to reasonably reduce the bending moment generated when the impact force of underwater concrete acts on the steel support structure composed of the positioning bottom plate, positioner, steel side plates and steel cover, thus realizing the self-protection of the device.

[0058] 4. It can effectively position and protect the steel bar couplers embedded in the diaphragm wall. This positioning and protection device is convenient for construction. And after the subsequent connection between the diaphragm wall and the main structure of the station is completed, components such as the positioner can be recycled, with a high reuse rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0060] Figure 1 It is a schematic installation diagram of the positioning and protection device for the steel bar couplers embedded in the diaphragm wall of this embodiment.

[0061] Figure 2 It is a schematic plan view of the positioning bottom plate of this embodiment.

[0062] Figure 3 It is a schematic plan view of the positioning bottom plate, embedded steel bar coupler and positioner of this embodiment.

[0063] Figure 4 It is a three-dimensional schematic diagram of the steel side plate of this embodiment.

[0064] Figure 5 It is a schematic inner plane view of the steel cover of this embodiment.

[0065] Figure 6 It is a schematic outer plane view of the steel cover of this embodiment.

[0066] Figure 7 It is a schematic structural diagram of the first bolt of this embodiment.

[0067] Figure 8 It is a three-dimensional schematic diagram of the positioner of this embodiment.

[0068] Figure 9 It is a schematic plan view of the inflatable airbag and steel side plate of this embodiment.

[0069] In the figure, 1. Embedded steel bar connector, 2. Positioning base plate, 3. Steel side plate, 4. Positioner, 5. First bolt, 6. Steel cover, 7. Bolt protection cover, 8. First steel side plate limiting groove, 9. Anchor bar hole of diaphragm wall, 10. First connector limiting hole, 11. Third positioner limiting groove, 12. Second steel side plate limiting groove, 13. First screw hole, 14. Nut hole, 15. Anchor bar of diaphragm wall, 16. Second bolt hole, 17. Second bolt, 19. Nut, 20. Screw, 21. Positioner flank, 22. First positioner limiting groove, 23. Second positioner limiting groove, 24. Second connector limiting hole, 25. Horizontal bar of diaphragm wall, 26. Inflatable airbag, 27. Flexible air pipe, 28. External inflatable nozzle, 29. Compressed air machine. Specific implementation mode

[0070] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0071] Embodiment 1

[0072] This embodiment provides a positioning and protection device for an embedded steel bar connector of a diaphragm wall, hereinafter referred to as the positioning and protection device, as Figures 1-3 shown, including:

[0073] A positioner 4 is arranged outside the embedded steel bar connector 1 to position the embedded steel bar connector 1;

[0074] A positioning base plate 2 is welded to the horizontal bar 25 of the diaphragm wall. The embedded steel bar connector 1 and the positioner 4 are installed on the positioning base plate 2, and the anchor bar 15 of the diaphragm wall penetrates through the positioning base plate 2 and is connected to the embedded steel bar connector 1;

[0075] Steel side plates 3 are arranged on both sides of the positioner 4 to protect the positioner 4;

[0076] A steel cover 6 is arranged on the top of the embedded steel bar connector 1, the positioner 4 and the steel side plates 3;

[0077] The bottom of the steel side plate 3 is connected to the positioning base plate 2, and the top of the steel side plate 3 is connected to the steel cover 6.

[0078] Through the above structure setting, a stable steel support structure is formed around the embedded steel bar connector 1. The steel side plates 3 around are used to bear the load from the concrete, avoiding the direct load on the embedded steel bar connector 1. The positioner 4 is arranged around the embedded steel bar connector 1, avoiding the collision with the groove wall during the hoisting of the diaphragm wall reinforcement cage, preventing the angular deviation or elevation deviation of the embedded steel bar connector 1, and also preventing the damage to the embedded steel bar connector 1 during the subsequent chiseling of the diaphragm wall. In addition, the positioner 4 simply supports the steel side plates 3 at multiple points, reducing the bending moment generated by the concrete impact force on the steel side plates and reducing the deformation of the steel side plates 3.

[0079] In some embodiments, as Figure 2 shown, the first steel side plate limiting groove 8, the diaphragm wall anchor bar hole 9, the first connector limiting hole 10 and the first positioner limiting groove 22 are reserved on the positioning bottom plate 2;

[0080] As Figure 5 shown, the first bolt hole, the second connector limiting hole 24, the second positioner limiting groove 23 and the second steel side plate limiting groove 12 are reserved on the steel cover 6;

[0081] The bottom of the embedded steel bar connector 1 is arranged in the corresponding first connector limiting hole 10, and the top is arranged in the corresponding second connector limiting hole 24;

[0082] The bottom of the positioner 4 is arranged in the corresponding first positioner limiting groove 22, and the top is arranged in the corresponding second positioner limiting groove 23;

[0083] The bottom of the steel side plate 3 is arranged in the first steel side plate limiting groove 8, and the top is arranged in the second steel side plate limiting groove 12;

[0084] The diaphragm wall anchor bar 15 passes through the diaphragm wall anchor bar hole 9 and is connected to the embedded steel bar connector 1 in the corresponding first connector limiting hole 10;

[0085] The first bolt 5 is threadedly connected to the internal thread of the embedded steel bar coupler 1 through the first bolt hole on the steel sealing cover 6, connecting the embedded steel bar coupler 1, the positioning bottom plate 2, the steel side plate 3, the positioner 4 and the steel sealing cover 6 into one body, ensuring that the components will not be displaced due to impact during the subsequent hoisting of the steel reinforcement cage and the pouring of underwater concrete. At the same time, by using the first bolt 5, it can play a plugging role, avoiding the concrete from entering the inside of the embedded steel bar coupler 1 during the pouring of underwater concrete for the diaphragm wall, causing damage and corrosion to the internal thread of the embedded steel bar coupler 1, improving the survival rate of the embedded steel bar coupler 1, and avoiding the need for post-implantation reinforcement due to the abnormal use of the embedded steel bar coupler 1 in the later stage, saving a large amount of manpower, material resources and financial resources. The positioning bottom plate 2, the steel side plate 3 and the steel sealing cover 6 are spliced, the construction process is simple and fast, reducing the time required for welding, and after the subsequent chiseling construction of the diaphragm wall is completed, it can be recycled and reused, improving the utilization rate and saving construction costs.

[0086] Specifically, as Figure 6 shown, the first bolt hole includes a first screw hole 13 and a nut hole 14. The nut 19 of the first bolt 5 is arranged in the nut hole 14, and the screw 20 of the first bolt 5 is arranged in the first screw hole 13.

[0087] In some embodiments, a plurality of embedded steel bar couplers 1 are installed on the positioning bottom plate 2;

[0088] The steel side plate 3 is arranged on both sides of a plurality of positioners 4;

[0089] The steel sealing cover 6 is installed on the tops of a plurality of positioners 4 and embedded steel bar couplers 1;

[0090] A plurality of first bolt holes are formed on the steel sealing cover 6, and a plurality of first bolts 5 are connected to a plurality of embedded steel bar couplers 1 in one-to-one correspondence through the corresponding first bolt holes.

[0091] In some embodiments, as Figure 7 shown, the central positions of the nut 19 and the screw 20 of the first bolt 5 are hollow structures, and the shape of the nut 19 is a regular hexagon. On the one hand, such a design can reduce its weight while ensuring the strength of the first bolt 5. On the other hand, a positioner is placed in the hollow structure of the first bolt 5, that is, the nut 19 and the screw 20. After the underwater concrete is poured, when the embedded steel bar coupler 1 is excavated, there may be a situation where the elevation of the embedded steel bar coupler 1 on the drawing does not match the actual elevation due to the settlement of the diaphragm wall. At this time, the position of the positioning protection device can be determined through the positioner, realizing the accurate excavation of the embedded steel bar coupler 1, avoiding large-scale excavation, saving a large amount of manpower and material resources, and improving construction efficiency.

[0092] In some embodiments, a detachable bolt protection cover 7 is provided at the orifice of the nut hole 14. The bolt protection cover 7 is used to protect the nut 19 of the first bolt 5, preventing concrete from entering the hollow structure of the first bolt 5. The surface of the bolt protection cover 7 is flush with the surface of the steel sealing cover 6 to avoid the situation where concrete seals the bolt protection cover 7 due to the height difference between the surface of the bolt protection cover 7 and the steel sealing cover 6, which may affect subsequent disassembly. When installing the first bolt 5, open the bolt protection cover 7, screw the first bolt 5 into the first bolt hole. After installation, cover the bolt protection cover 7 to effectively protect the first bolt 5 and prevent concrete from entering the first bolt hole during underwater concrete pouring, which may affect the subsequent disassembly of the first bolt 5.

[0093] In some embodiments, the depth of the first steel side plate limiting groove 8 and the first locator limiting groove 22 reserved on the positioning base plate 2 is maintained at half of the thickness of the positioning base plate 2, and the height of the diaphragm wall anchor bar hole 9 reserved is half of the thickness of the positioning base plate 2. Limiting the depth of the first steel side plate limiting groove 8, the diaphragm wall anchor bar hole 9 and the first locator limiting groove 22 is to avoid the phenomenon of misalignment between components during subsequent construction due to too small slot (hole) depth, which may cause the positioning protection device to fail. On the other hand, it is to avoid reducing the strength of each component due to too large opening (slot) depth, which may cause the protection performance of the positioning protection device to decrease. Unifying the slot (hole) depth can facilitate construction and improve construction efficiency. The diameter of the diaphragm wall anchor bar hole 9 is the same as the diameter of the diaphragm wall anchor bar 15, and the center of the first coupler limiting hole 10 coincides with the center of the diaphragm wall anchor bar hole 9, effectively reducing the axis deviation of the embedded steel bar coupler 1 caused by underwater concrete pouring.

[0094] In some embodiments, the second steel side plate limiting groove 12, the second locator limiting groove 23, and the second connector limiting hole 24 are all located inside the steel cover 6, the nut hole 14 is located outside the steel cover 6, and the second connector limiting hole 24 communicates with the nut hole 14 through the first screw hole 13. The centers of the circle of the first screw hole 13, the center of the circle of the nut hole 14, and the center of the circle of the second connector limiting hole 24 coincide. The depths of the second steel side plate limiting groove 12 and the second locator limiting groove 23 reserved on the steel cover 6 are maintained at one-third of the thickness of the steel cover 6, and the hole depths of the second connector limiting hole 24 and the nut hole 14 are both one-third of the thickness of the steel cover 6. The reason for such a design is that the aperture of the nut hole 14 is smaller than the sum of the width of the second locator limiting groove 23 and the aperture of the second connector limiting hole 24. If the depth of the groove (hole) is one-half of the thickness of the steel cover, it is easy for the cement slurry to invade the inside of the positioning protection device during subsequent construction. However, when the depth of the groove (hole) is one-third of the thickness of the steel cover 6, there will be a buffer zone between the nut hole 14 and the second connector limiting hole 24 on the steel cover 6, which can prevent the cement slurry from invading the inside of the positioning protection device during subsequent construction. At the same time, this can also ensure the tight connection between the first bolt 5, the steel cover 6, and the embedded steel bar connector 1.

[0095] In some embodiments, each embedded steel bar connector 1 is surrounded by two detachable locators 4 that are cooperatively connected;

[0096] The locators 4 of two adjacent embedded steel bar connectors 1 on the positioning base plate 2 are detachably connected, ensuring that all the embedded steel bar connectors 1 are on the same horizontal line and there will be no excessive elevation or angular deviation.

[0097] In some embodiments, L-shaped locator side wings 21 are respectively provided at the joints of the two locators 4 of each embedded steel bar connector 1, and second bolt holes 16 are reserved on both plates forming the L shape of each locator side wing 21, as Figure 8 shown;

[0098] As Figure 3 shown, the locator side wings 21 of the two locators 4 of each embedded steel bar connector 1 are detachably connected by a second bolt 17 that matches the second bolt hole 16;

[0099] The locator side wings 21 of the locators 4 of two adjacent embedded steel bar connectors 1 are detachably connected by a second bolt 17 that matches the second bolt hole 16, ensuring that all the embedded steel bar connectors 1 are on the same horizontal line and preventing the occurrence of azimuth angle deviation, which may affect the subsequent connection with the main structure of the station.

[0100] In some embodiments, as Figure 4As shown in the figure, on one side of the steel side plate 3 close to the locator 4, third locator limiting grooves 11 corresponding one by one to the locator flanks 21 of multiple locators 4 are reserved. The third locator limiting grooves 11 are engaged with the locator flanks 21 of the locator 4 in a matching manner to realize the mutual limiting function between the steel side plate 3 and the locator 4.

[0101] In some embodiments, the depth of the third locator limiting grooves 11 reserved on the steel side plate 3 is maintained at half of the thickness of the steel side plate 3.

[0102] In some embodiments, since the positioning protection device of the embedded steel bar coupler for the diaphragm wall is a spliced structure, it is difficult to avoid the underwater concrete slurry from seeping into the splicing seam. To save the disassembly time, as Figure 9 shown in the figure, an inflatable airbag 26 is arranged between multiple locators 4 and the steel side plate 3, and two adjacent inflatable airbags 26 are communicated. Specifically, two adjacent inflatable airbags 26 can be communicated through a flexible air pipe 27 penetrating through the locator flanks 21 of the locator 4. An external inflatable nozzle 28 penetrating through the steel side plate 3 is arranged on each inflatable airbag 26, and a detachable rubber protection plug is arranged on the external inflatable nozzle 28 to prevent the external inflatable nozzle 28 from being blocked by the concrete slurry subsequently.

[0103] After the concrete outside the positioning protection device of the embedded steel bar coupler for the diaphragm wall is chiseled and the first bolt 5 is removed, the soft rubber plug on the external inflatable nozzle 28 is removed, the external inflatable nozzle 28 of the inflatable airbag 26 and the air compressor 29 are communicated, and air is pressed into the inflatable airbag 26 through the air compressor 29. The steel cover 6 is disassembled by using the impact force generated by the inflation of the inflatable airbag 26 to realize the rapid removal of the steel cover 6.

[0104] Embodiment 2

[0105] This embodiment provides a construction method for the positioning protection device of the embedded steel bar coupler for the diaphragm wall described in Embodiment 1, including the following steps:

[0106] Step S1: Determine the specification model and layout spacing of the embedded steel bar coupler 1. Along the layout direction of the embedded steel bar coupler 1, mark the positions of the diaphragm wall anchor bars 15 connected to one end of the embedded steel bar coupler 1 on the positioning base plate 2, and open holes on the positioning base plate 2 according to the diameter of the diaphragm wall anchor bars 15 to form diaphragm wall anchor bar holes 9;

[0107] Step S2: Continuously open holes on the basis of the diaphragm wall anchor bar holes 9 according to the outer diameter of the embedded steel bar coupler 1 to form first coupler limiting holes 10. Determine the thickness of the locator 4, and reserve first locator limiting grooves 22 along the edge of the locator 4 on the inner side of the positioning base plate 2;

[0108] Step S3: Determine the thickness of the steel side plate 3, and reserve the first steel side plate limiting grooves 8 at symmetric positions on the positioning base plate 2;

[0109] Step S4: According to the thickness of the locator flank 21 of the locator 4, groove the third locator limiting groove 11 on the inner side of the steel side plate 3, and the grooving direction is perpendicular to the positioning base plate 2; It should be noted that along the layout direction of the third locator limiting groove 11, the widths of the first and the last third locator limiting grooves 11 are both equal to the thickness of the locator flank 21 of the locator 4, and the widths of the remaining third locator limiting grooves 11 are equal to twice the thickness of the locator flank 21 of the locator 4;

[0110] Step S5: Determine the specification and model of the first bolt 5, and according to the position of the inner hole center of the embedded steel bar coupler 1, open holes on the corresponding position of the steel cover 6 to form the first screw hole 13 according to the diameter of the screw rod 20 of the first bolt 5, and the opening depth of the first screw hole 13 is equal to the thickness of the steel cover 6;

[0111] Step S6: Continue to open holes on the outer side of the steel cover 6 where the first screw hole 13 is located to form the nut hole 14 according to the diameter of the nut 19 of the first bolt 5, and the opening depth is equal to the sum of the height of the nut 19 of the first bolt 5 and the thickness of the bolt protection cover 7;

[0112] Step S7: Reserve the second steel side plate limiting grooves 12 at symmetric positions on the inner side of the steel cover 6, and the second steel side plate limiting grooves 12 correspond to the first steel side plate limiting grooves 8 on the positioning base plate 2;

[0113] Step S8: Reserve the second locator limiting grooves 23 along the edge of the locator 4 on the inner side of the steel cover 6, and the second locator limiting grooves 23 correspond to the first locator limiting grooves 22 on the positioning base plate 2;

[0114] Step S9: Assemble the positioning and protection device. First, pass the positioning bottom plate 2 through the diaphragm wall anchor bar hole 9 and weld the positioning bottom plate 2 to the diaphragm wall horizontal bar 25. Then, sequentially install the embedded steel bar coupler 1 and the positioner 4. Adjacent two positioners 4 are connected by the second bolt 17. After all the positioners 4 are connected, it is necessary to ensure that all the embedded steel bar couplers 1 are on the same horizontal line, and ensure that the embedded steel bar coupler 1 and the positioner 4 are completely snapped into the corresponding first coupler limiting hole 10 and the first positioner limiting groove 22. Next, install the steel side plate 3. Similarly, it is necessary to ensure that the two steel side plates 3 are completely embedded into the corresponding first steel side plate limiting groove 8, and ensure that the positioner flank 21 of the positioner 4 is snapped into the corresponding third positioner limiting groove 11. Finally, install the steel cover 6. After ensuring that the embedded steel bar coupler 1, the positioner 4, and the steel side plate 3 are completely embedded into the corresponding second coupler limiting hole 24, the second positioner limiting groove 23, and the second steel side plate limiting groove 12, screw in the first bolt 5 and cover the bolt protection cover 7 to complete the installation construction of the positioning and protection device for the embedded steel bar coupler of the diaphragm wall.

[0115] By constructing using the above method, a positioner 4, a steel side plate 3, and a steel cover 6 are arranged around the embedded steel bar coupler 1, and a steel support structure composed of a positioning bottom plate 2, a steel side plate 3, a positioner 4, and a steel cover 6 outside the embedded steel bar coupler 1 is formed by a method similar to "building blocks". While protecting the embedded steel bar coupler 1, the first bolt 5 also plays a role in fixing the steel support structure, reducing the parts that need to be welded and fixed, and overcoming the disadvantage of the traditional method that the positioning and protection of the embedded steel bar coupler 1 are not in place. It should be noted that the above positioner 4, steel side plate 3, steel cover 6, and the first bolt 5, etc. can all be recycled and reused, reducing the construction cost and having good economic benefits.

[0116] The above is only the preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. Positioning and protection device for embedded steel bar connecting device of diaphragm wall, characterized in that Including: A locator (4), which is arranged outside the embedded steel bar coupler (1) to position the embedded steel bar coupler (1); A positioning base plate (2), which is welded to the diaphragm wall transverse reinforcement (25). The embedded steel bar coupler (1) and the locator (4) are installed on the positioning base plate (2), and the diaphragm wall anchor bar (15) penetrates through the positioning base plate (2) to be connected with the embedded steel bar coupler (1); Steel side plates (3), which are arranged on both sides of the locator (4) to protect the locator (4); A steel cover (6), which is arranged on the top of the embedded steel bar coupler (1), the locator (4) and the steel side plates (3); The bottom of the steel side plate (3) is connected to the positioning base plate (2), and the top of the steel side plate (3) is connected to the steel cover (6); The positioning base plate (2) is provided with a first steel side plate limiting groove (8), a diaphragm wall anchor bar hole (9), a first coupler limiting hole (10) and a first locator limiting groove (22); The steel cover (6) is provided with a first bolt hole, a second steel side plate limiting groove (12), a second locator limiting groove (23) and a second coupler limiting hole (24); The bottom of the embedded steel bar coupler (1) is arranged in the corresponding first coupler limiting hole (10), and the top is arranged in the corresponding second coupler limiting hole (24); The bottom of the steel side plate (3) is arranged in the first steel side plate limiting groove (8), and the top is arranged in the second steel side plate limiting groove (12); The bottom of the locator (4) is arranged in the corresponding first locator limiting groove (22), and the top is arranged in the corresponding second locator limiting groove (23); The diaphragm wall anchor bar (15) passes through the diaphragm wall anchor bar hole (9) to be connected with the embedded steel bar coupler (1) in the corresponding first coupler limiting hole (10); A first bolt (5) passes through the first bolt hole on the steel cover (6) and is threadedly connected to the embedded steel bar coupler (1), connecting the embedded steel bar coupler (1), the positioning base plate (2), the steel side plates (3), the locator (4) and the steel cover (6) into one body; Each of the embedded steel bar couplers (1) is surrounded by two detachable locators (4) in cooperation; The locators (4) of two adjacent embedded steel bar couplers (1) on the positioning base plate (2) are detachably connected; L-shaped locator flanks (21) are respectively arranged at the joints of the two locators (4) of each embedded steel bar coupler (1), and second bolt holes (16) are reserved on both plates forming the L shape of each locator flank (21); The locator flanks (21) of the two locators (4) of each embedded steel bar coupler (1) are detachably connected by a second bolt (17) matching the second bolt hole (16); The locator flanks (21) of two adjacent locators (4) are detachably connected by a second bolt (17) matching the second bolt hole (16).

2. The positioning and protection device for the embedded steel bar connector of the diaphragm wall according to claim 1, characterized in that, A plurality of embedded steel bar couplers (1) are installed on the positioning base plate (2); The steel side plates (3) are arranged on both sides of a plurality of locators (4); The described steel cover (6) is installed on top of multiple locators (4) and embedded steel bar couplers (1); Multiple first bolt holes are provided on the described steel cover (6), and multiple first bolts (5) are connected to the multiple embedded steel bar couplers (1) one by one through the corresponding first bolt holes.

3. The positioning and protection device for the embedded steel bar connector of the diaphragm wall according to claim 1, characterized in that, The central positions of the nuts (19) and screw rods (20) of the described first bolts (5) are hollow structures; Locators are placed inside the hollow structures of the nuts (19) and screw rods (20); The described first bolt hole consists of a first screw rod hole (13) and a nut hole (14), and a detachable bolt protection cover (7) is provided at the orifice of the nut hole (14); The diameter of the diaphragm wall anchor bar hole (9) is the same as the diameter of the diaphragm wall anchor bar (15), and the center of the first coupler limiting hole (10) coincides with the center of the diaphragm wall anchor bar hole (9); The second steel side plate limiting groove (12), the second locator limiting groove (23), and the second coupler limiting hole (24) are all located inside the steel cover (6), and the nut hole (14) is located outside the steel cover (6); The second coupler limiting hole (24) communicates with the nut hole (14) through the first screw rod hole (13), and the centers of the first screw rod hole (13), the nut hole (14), and the second coupler limiting hole (24) coincide.

4. The positioning and protection device for the embedded steel bar connector of the diaphragm wall according to claim 1, characterized in that, On one side of the steel side plate (3) close to the locator (4), a third locator limiting groove (11) corresponding to the locator flanks (21) of the multiple locators (4) is reserved; The third locator limiting groove (11) is snap-fitted with the locator flanks (21) of the locator (4).

5. The positioning and protection device for the embedded steel bar connector of the diaphragm wall according to any one of claims 1 to 4, characterized in that, An inflatable airbag (26) is arranged between the multiple locators (4) and the steel side plate (3), and two adjacent inflatable airbags (26) are communicated; Each of the described inflatable airbags (26) is provided with an external inflatable nozzle (28) penetrating through the steel side plate (3), and a detachable rubber protection plug is provided on the external inflatable nozzle (28).

6. The construction method of the positioning and protection device for the embedded steel bar connector of the diaphragm wall, as described in any one of claims 1 to 4, is characterized in that, Including the following steps: Step S1: Determine the specification model and layout spacing of the embedded steel bar coupler (1), along the layout direction of the embedded steel bar coupler (1), mark the position of the diaphragm wall anchor bar (15) connected to one end of the embedded steel bar coupler (1) on the positioning bottom plate (2), and open a hole on the positioning bottom plate (2) according to the diameter of the diaphragm wall anchor bar (15) to form a diaphragm wall anchor bar hole (9); Step S2: Continuously open a hole on the basis of the diaphragm wall anchor bar hole (9) according to the outer diameter of the embedded steel bar coupler (1) to form a first coupler limiting hole (10), determine the thickness of the locator (4), and reserve a first locator limiting groove (22) along the edge of the locator (4) inside the positioning bottom plate (2); Step S3: Determine the thickness of the steel side plate (3), and reserve a first steel side plate limiting groove (8) at the symmetrical position on the positioning bottom plate (2); Step S4: According to the thickness of the locator flanks (21) of the locator (4), open a third locator limiting groove (11) on the inner side of the steel side plate (3), and the grooving direction is perpendicular to the positioning bottom plate (2); Step S5: Determine the specification model of the first bolt (5). According to the center position of the inner hole of the embedded steel bar coupler (1), drill a first screw hole (13) at the corresponding position on the steel cover (6) with a diameter equal to that of the screw rod (20) of the first bolt (5). The drilling depth of the first screw hole (13) is equal to the thickness of the steel cover (6). Step S6: Continuously drill a nut hole (14) at the outer side of the steel cover (6) of the first screw hole (13) with a diameter equal to that of the nut (19) of the first bolt (5). The drilling depth is equal to the sum of the height of the nut (19) of the first bolt (5) and the thickness of the bolt protection cover (7). Step S7: Reserve second steel side plate limiting grooves (12) at symmetric positions on the inner side of the steel cover (6). The second steel side plate limiting grooves (12) correspond to the first steel side plate limiting grooves (8) on the positioning base plate (2). Step S8: Reserve second locator limiting grooves (23) along the edge of the locator (4) on the inner side of the steel cover (6). The second locator limiting grooves (23) correspond to the first locator limiting grooves (22) on the positioning base plate (2). Step S9: Assemble the positioning protection device of the diaphragm wall embedded steel bar coupler, and complete the installation construction of the positioning protection device of the diaphragm wall embedded steel bar coupler.

7. The construction method of the positioning and protection device for the embedded steel bar connector of the diaphragm wall, characterized in that, The specific process of the above Step S9 is as follows: First, pass the positioning base plate (2) through the diaphragm wall anchor bar holes (9) and through the diaphragm wall anchor bars (15), and weld the positioning base plate (2) to the diaphragm wall transverse bars (25). Then, install the embedded steel bar coupler (1) and the locator (4) in sequence. Adjacent two locators (4) are connected by the second bolt (17). After all the locators (4) are connected, it is necessary to ensure that all the embedded steel bar couplers (1) are on the same horizontal line, and it is necessary to ensure that the embedded steel bar couplers (1) and the locators (4) are completely clamped into the corresponding first coupler limiting holes (10) and the first locator limiting grooves (22). Next, install the steel side plates (3). After installation, it is necessary to ensure that the two steel side plates (3) are completely embedded into the corresponding first steel side plate limiting grooves (8), and ensure that the locator flanks (21) of the locator (4) are clamped into the corresponding third locator limiting grooves (11). Finally, install the steel cover (6). After ensuring that the embedded steel bar coupler (1), the locator (4), and the steel side plates (3) are completely embedded into the corresponding second coupler limiting holes (24), the second locator limiting grooves (23), and the second steel side plate limiting grooves (12), screw in the first bolt (5) with the locator placed and cover the bolt protection cover (7). In Step S4, along the layout direction of the third locator limiting grooves (11), the widths of the first third locator limiting groove (11) and the last third locator limiting groove (11) are both equal to the thickness of the locator flank (21) of the locator (4), and the widths of the remaining third locator limiting grooves (11) are equal to twice the thickness of the locator flank (21) of the locator (4).

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