Auxiliary support mechanism for grouting of pier column pin holes and construction method thereof

Abstract

The present application relates to an auxiliary support mechanism and a construction method for supplementary grouting of a pier column pin hole. A grouting assembly can be unlocked and installed at the first grouting hole of the corresponding support plate. The support assembly is inserted in the middle position of the pin hole, and the pin hole is divided into a first grouting space and a second grouting space by two support plates. Concrete is respectively poured into the first grouting space by two grouting assemblies. The two support plates are connected by a connecting rod. When the first grouting space is filled with concrete and the first grouting pressure is maintained, the position of the support plate will not move, which is convenient for ensuring the stability of concrete solidification. Then, the grouting assembly is unlocked from the support plate and poured into the second grouting space to achieve supplementary grouting of the entire pin hole. The above-mentioned use of the support plate can enhance the structural strength after pouring; and the grouting assembly is unlockably connected to the first pouring hole of the support plate, which is convenient for the grouting assembly to realize grouting of the first grouting space and the second grouting space respectively at different times.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to an auxiliary support mechanism for supplementary grouting of pier column pin holes and a construction method thereof. Background Art

[0002] In bridge construction projects, the construction of bridge pier cap beams is generally carried out by the hoop method or the steel rod method. The hoop method uses a cap beam hoop composed of two semi-circular arc steel plates, which is installed at the appropriate position of the pier column and clamped with high-strength bolts, so as to use the friction between the hoop and the pier column to support the temporary support for the cap beam construction. In order to ensure the stability of the hoop support, pin holes are usually drilled in the pier column and steel rods are inserted into the pin holes, so as to support the bottom of the hoop through the steel rod to avoid the problem of insufficient friction between the hoop and the pier column. When the steel rod method is used for construction, it is necessary to drill pin holes on the pier column and insert steel rods into the pin holes. The temporary support for the cap beam construction is placed and installed on the steel rod, and the entire temporary support is directly supported by the steel rod.

[0003] After the construction is completed, a pin hole will be left on the pier column. The pin hole generally runs through the pier column horizontally, which will directly affect the structural stability of the pier column. Therefore, the pin hole needs to be repaired. In the related art, a pouring pipe is generally installed on the surface of the pier column, and concrete is directly poured into the pin hole, and then maintained until the concrete solidifies. However, the concrete structure poured by this pouring method is not stable, which affects the overall structural strength of the pier column. Summary of the invention

[0004] Based on this, it is necessary to provide an auxiliary support mechanism and a construction method for supplementary pouring of pier column pin holes that can improve the pouring strength in order to solve the above problems.

[0005] 1. The grouting mechanism of claim 1, wherein the support assembly comprises a connecting rod and two support plates spaced relatively apart from each other, the connecting rod being located between the two support plates, and the two opposite ends of the connecting rod being connected to the two support plates, respectively. The two support plates are provided with exhaust holes and first grouting holes spaced apart from the exhaust holes, and the space between the two support plates is formed as a first grouting space. The supporting assembly is used to be inserted into the pin hole of the pier, and a side of one of the support plates facing away from the other support plate is formed as a second grouting space. The number of the grouting assemblies is consistent with the number of the support plates, and each of the grouting assemblies can be unlockably docked at the first grouting hole of the corresponding support plate, and the grouting assembly is located on a side of the docked support plate facing away from the other support plate.

[0006] In one of the embodiments, the grouting assembly includes a grouting pipe, a grouting joint and a quick-locking unit; the grouting joint is connected to one end of the grouting pipe, the quick-locking unit can be movably mounted outside the grouting joint, a butt joint is formed on the side of the support plate facing away from the first grouting space, the butt joint can be docked with the grouting joint, and the quick-locking unit can unlockably lock the butt joint and the grouting joint.

[0007] In one embodiment, the auxiliary support mechanism also includes a one-way component, the number of the one-way components is consistent with the number of the support plates, each of the one-way components is correspondingly arranged at a first grouting hole of the support plate, and the one-way component is used to realize one-way flow of fluid from the grouting component to the first grouting space.

[0008] In one of the embodiments, the quick-locking unit includes a movable sleeve, a locking body, a pulling piece and a locking elastic piece. A movable hole penetrating through the inner wall of the grouting joint is provided on the outer wall of the grouting joint. The locking body is arranged in the movable hole and can move along the axial direction of the movable hole. A locking groove is provided on the outer wall of the butt joint. The movable sleeve is sleeved on the grouting joint, and the locking elastic piece is arranged on the grouting joint and provides an elastic force for the movable sleeve to slide in the direction of the movable hole. When the butt joint is inserted into the grouting joint, the movable sleeve can slide in the direction of the support plate and cover the movable hole under the action of the locking elastic piece, so that the movable sleeve presses part of the locking body into the locking groove, so that the butt joint is locked with the grouting joint. One end of the pulling piece is provided on the movable sleeve, and the other end extends out of the pin hole along the grouting pipe. The pulling piece can drive the movable sleeve to move in a direction away from the support plate, so that the butt joint is unlocked from the grouting joint.

[0009] In one embodiment, the auxiliary support mechanism also includes two end covers and two positioning rods, the two positioning rods are respectively installed on the side of the corresponding support plate forming the second grouting space, the end cover is installed on the positioning rod, the cross-sectional size of the end cover tends to decrease in the direction toward the support plate, the position of the largest size of the end cover is interference fit with the pin hole, and the end cover is spaced from the outer wall of the pier; second grouting holes are opened on the two end covers, the grouting pipe is inserted into the second grouting holes, and the space between the end cover and the support plate forms the second grouting space.

[0010] In one of the embodiments, a safety monitor is provided on a side of the end cover facing the support plate, and the safety monitor is used to sense the stress and / or strain of concrete in the second grouting space.

[0011] In one embodiment, the auxiliary support mechanism also includes a reinforcement member, which is installed on the positioning rod and is located between the end cover and the support plate, and is spaced apart from the end cover and the support plate. The reinforcement member includes two spaced apart reinforcement mesh plates, one of which is located 12cm-20cm away from the pier surface, and the other reinforcement mesh plate is located 8cm-12cm away from the pier surface.

[0012] In one embodiment, the auxiliary support mechanism also includes a construction platform, which includes a platform portion and an overlapping portion, one end of the overlapping portion is installed on the top of the pier, and the other end is connected to the platform portion, and the platform portion is located at the pin hole of the pier.

[0013] Compared with the prior art, the auxiliary support mechanism for grouting the pier column pin hole has at least the following advantages:

[0014] During construction, the grouting assembly is installed at the first grouting hole of the corresponding support plate, and then the support assembly is inserted in the middle position of the pin hole, and the pin hole is divided into a first grouting space and two second grouting spaces by two spaced support plates. Concrete is poured into the first grouting space respectively by two grouting assemblies. Since the two support plates are connected by connecting rods, when the first grouting space is filled with concrete and the first grouting pressure is maintained, the position of the support plate will not move, which is convenient for achieving the pouring pressure of the concrete in the first grouting space, thereby ensuring the stability of the concrete solidification. Then, after the grouting assembly is unlocked from the support plate, the second grouting space is poured to achieve the supplementary pouring of the entire pin hole. The above-mentioned auxiliary support mechanism uses the support plate to divide the space in the pin hole on the one hand, so as to achieve the segmented supplementary pouring of the laterally arranged pin hole, which is convenient for achieving the purpose of increasing the pouring pressure of the concrete. On the other hand, the support plate can also strengthen the structural strength after pouring to improve the overall structural strength of the pier column. At the same time, the grouting assembly is unlockably connected to the first pouring hole of the support plate, so that the grouting assembly can grout the first grouting space and the second grouting space at different times.

[0015] A construction method for supplementary pouring of pier column plug pin holes, using the auxiliary support mechanism for supplementary pouring of pier column plug pin holes as described above, the construction method comprising:

[0016] The support assembly is inserted into the latch hole and arranged at the middle position of the latch hole;

[0017] injecting concrete into the first grouting space and maintaining the first grouting pressure;

[0018] After the first grouting space is filled with concrete, concrete is poured into the second grouting space, and the second grouting pressure is maintained until the second grouting space is filled, wherein the first grouting pressure is greater than the second grouting pressure.

[0019] In one embodiment, after the first grouting space is filled with concrete, pouring concrete into the second grouting space comprises:

[0020] After the first grouting space is filled with concrete, detecting the strength of the concrete in the first grouting space;

[0021] When the concrete strength in the first grouting space reaches a preset strength, concrete is poured into the second grouting space.

[0022] In one embodiment, the step of inserting the support assembly into the latch hole and arranging the support assembly at the middle position of the latch hole comprises:

[0023] The two grouting assemblies are respectively installed on the support plates of the two support assemblies;

[0024] The step of injecting concrete into the first grouting space comprises:

[0025] injecting concrete into the first grouting space through the grouting assembly;

[0026] After the first grouting space is filled with concrete, pouring concrete into the second grouting space comprises:

[0027] When the first grouting space is filled with concrete, the locking of the butt joint with the support plate is released by pulling the pulling piece of the quick lock unit of the grouting assembly;

[0028] Concrete is injected into the second grouting space through the grouting assembly.

[0029] In one embodiment, the method of filling the second grouting space further comprises:

[0030] Testing the concrete strength in the second grouting space;

[0031] When the concrete strength in the second grouting space reaches a stable strength, obtaining initial stress and / or strain data of the end cover;

[0032] Collect current stress and / or strain data of the end cap;

[0033] Determine the change value of the stress and / or strain of the end cap according to the initial stress and / or strain data;

[0034] When the change value is greater than the alarm threshold, an alarm will be issued.

[0035] Compared with the prior art, the above construction method for pier pin hole filling has at least the following advantages:

[0036] During construction, the support assembly is inserted into the pin hole and set in the middle of the pin hole; concrete is poured into the first grouting space, and the first grouting pressure is maintained. When the first grouting space is filled with concrete, concrete is poured into the second grouting space, and the second grouting pressure is maintained until the second grouting space is filled, thereby realizing the supplementary pouring of the entire pin hole. The first grouting pressure is greater than the second grouting pressure to avoid excessive second grouting pressure, which causes the concrete to collapse from the orifice of the pin hole. The first grouting pressure is relatively large, which can strengthen the concrete pressure in the middle of the pin hole and strengthen the stability of the supplementary pouring structure. At the same time, the support assembly is embedded in the supplementary pouring concrete, and the support assembly is used to further strengthen the structural strength of the supplementary pouring structure, thereby improving the overall structural strength of the pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0040] Figure 1 It is a cross-sectional view of an auxiliary support mechanism for supplementary grouting of a pier column pin hole in an embodiment installed in the pier column pin hole.

[0041] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0042] Figure 3 for Figure 2 A partial enlarged view of the grouting assembly and the support plate.

[0043] Figure 4 for Figure 3 A cross-sectional view of the support plate and the one-way component in the open state.

[0044] Figure 5 for Figure 4 A side view of the support plate and one-way assembly is shown.

[0045] Figure 6 for Figure 2Schematic diagram of the structure of the end cover.

[0046] Figure 7 It is a structural schematic diagram of a construction platform installed on a pier column in one embodiment.

[0047] Figure 8 for Figure 7 A top view of the construction platform is shown.

[0048] Description of reference numerals:

[0049] Auxiliary support mechanism 10; support assembly 100; connecting rod 110; support plate 120; exhaust hole 121; first grouting hole 122; butt joint 123; locking groove 124; mounting hole 125; grouting assembly 200; grouting pipe 210; grouting joint 220; movable hole 221; quick lock unit 230; movable sleeve 231; locking body 232; pulling member 233; connecting ring 2331; claw 233 2; pulling part 2333; locking elastic member 234; one-way component 300; covering plate 310; one-way elastic member 320; one-way connecting member 330; end cover 400; second grouting hole 410; safety monitor 420; positioning rod 500; reinforcement member 600; construction platform 700; platform part 710; overlapping part 720; pier 20; pin hole 30; first grouting space 302; second grouting space 304. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0051] See also Figure 1 and Figure 2The auxiliary support mechanism 10 for grouting of the pier column pin hole in one embodiment of the present application is applied in the construction of the cap beam. When the pin hole 30 is reserved on the pier column 20 and needs to be grouted, the auxiliary support mechanism 10 can at least ensure the reliability of the structure after the grouting. Specifically, the auxiliary support mechanism 10 includes a support assembly 100 and a grouting assembly 200. The support assembly 100 includes a connecting rod 110 and two support plates 120 arranged relatively spaced apart. The connecting rod 110 is located between the two support plates 120, and the opposite ends of the connecting rod 110 are respectively connected to the two support plates 120. The two support plates 120 are both provided with an exhaust hole 121 and a first grouting hole 122 spaced apart from the exhaust hole 121. The space between the two support plates 120 forms a first grouting space 302. The support assembly 100 is used to be inserted into the pin hole 30 of the pier column 20, and the side of one support plate 120 facing away from the other support plate 120 forms a second grouting space 304. The number of grouting assemblies 200 is consistent with the number of support plates 120. Each grouting assembly 200 can be unlocked and docked at the first grouting hole 122 of the corresponding support plate 120, and the grouting assembly 200 is located on the side of the docked support plate 120 that is away from the other support plate 120.

[0052] During construction, the grouting assembly 200 is unlockably installed at the first grouting hole 122 of the corresponding support plate 120, and then the support assembly 100 is inserted in the middle position of the pin hole 30, and the pin hole 30 is divided into a first grouting space 302 and two second grouting spaces 304 by two spaced support plates 120. Concrete is poured into the first grouting space 302 through two grouting assemblies 200. Since the two support plates 120 are connected by the connecting rod 110, when the first grouting space 302 is filled with concrete and the first grouting pressure is maintained, the position of the support plate 120 will not move, which is convenient for achieving the pouring pressure of the concrete in the first grouting space 302, thereby ensuring the stability of the concrete solidification. Then, the grouting assembly 200 is unlocked from the first grouting hole 122 of the support plate 120, and the second grouting space 304 is poured to achieve the supplementary pouring of the entire pin hole 30. The support plate 120 is used to divide the space in the pin hole 30, so as to realize the segmented filling of the transversely arranged pin hole 30, so as to improve the pouring pressure of the concrete. On the other hand, the support plate 120 can also strengthen the structural strength after pouring, so as to improve the overall structural strength of the pier 20. The grouting assembly 200 is unlockably connected to the first pouring hole 122 of the support plate 120, so as to realize the grouting of the first grouting space 302 and the second grouting space 304 at different times.

[0053] At the same time, the exhaust hole 121 is provided on the support plate 120 to exhaust and release pressure in the first grouting space 302, thereby reducing or even avoiding the problem of explosion caused by excessive pressure. Moreover, by providing the exhaust hole 121, the problem of dead corner gas trapping during the pouring process can be avoided, thereby reducing the possibility of the problem of poor fullness of concrete pouring.

[0054] See also Figure 3 In one embodiment, the grouting assembly 200 includes a grouting pipe 210, a grouting joint 220 and a quick lock unit 230. The grouting joint 220 is connected to one end of the grouting pipe 210, and the quick lock unit 230 can be movably sleeved outside the grouting joint 220. A butt joint 123 is formed on the side of the support plate 120 facing away from the first grouting space 302, and the butt joint 123 can be docked with the grouting joint 220, and the quick lock unit 230 can unlockably lock the butt joint 123 and the grouting joint 220. Before the grouting construction, the butt joint 123 and the grouting joint 220 are locked together by operating the quick lock unit 230, and then the support assembly 100 and the grouting assembly 200 are both inserted into the pin hole 30 to complete the grouting of the first grouting space 302. Then, by operating the quick lock unit 230, the butt joint 123 is separated from the grouting joint 220, so that the grouting joint 220 is located in the second grouting space 304. The grouting assembly 200 can be directly used to continue grouting the second grouting space 304 without setting up a separate grouting assembly 200 for the second grouting space 304.

[0055] Specifically, the quick lock unit 230 includes a movable sleeve 231, a locking body 232, a pulling member 233 and a locking elastic member 234. The outer wall of the grouting joint 220 is provided with a movable hole 221 penetrating the inner wall thereof. The locking body 232 is arranged in the movable hole 221 and can move along the axis direction of the movable hole 221. The outer wall of the butt joint 123 is provided with a locking groove 124. The movable sleeve 231 is sleeved on the grouting joint 220, and the locking elastic member 234 is arranged on the grouting joint 220 and provides elastic force for the movable sleeve 231 to slide in the direction of the movable hole 221. When the butt joint 123 is inserted into the grouting joint 220, the movable sleeve 231 can slide in the direction of the support plate 120 and cover the movable hole 221 under the action of the locking elastic member 234, so that the movable sleeve 231 presses part of the locking body 232 into the locking groove 124, so that the butt joint 123 and the grouting joint 220 are locked. One end of the pull member 233 is disposed on the movable sleeve 231, and the other end extends out of the latch hole 30 along the grouting pipe 210. The pull member 233 can drive the movable sleeve 231 to move in a direction away from the support plate 120 to unlock the butt joint 123 and the grouting joint 220. In this embodiment, the locking elastic member 234 is a spring.

[0056] When the support assembly 100 and the grouting assembly 200 are both arranged in the latch hole 30, since the grouting joint 220 and the butt joint 123 are located inside the latch hole 30 and near the middle, it is inconvenient to unlock the grouting joint 220 and the butt joint 123. Figure 3 As shown, the grouting joint 220 and the butt joint 123 are in an unlocked state, the pulling member 233 is pulled to compress the locking elastic member 234, and the movable sleeve 231 is not pressed against the locking body 232. At this time, the grouting pipe 210 is pulled outward, and the locking body 232 can move outward along the direction of the movable hole 221 to disengage the locking groove 124 of the butt joint 123, so that the grouting joint 220 can be pulled away from the butt joint 123. When locking is required, the pulling of the pulling member 233 is released, and the movable sleeve 231 moves toward the direction of the support plate 120 under the action of the locking elastic member 234, and the locking body 232 is pressed into the locking groove 124 of the butt joint 123 to lock the grouting joint 220 and the butt joint 123. The quick lock unit 230 is provided with a pulling member 233 to operate the locking and unlocking of the grouting joint 220 and the docking joint 123 outside the latch hole 30, thereby preventing the narrow space inside the latch hole 30 from affecting the locking and unlocking operations.

[0057] In one embodiment, the pulling member 233 includes a connecting ring 2331, a claw 2332 and a pulling portion 2333. The connecting ring 2331 is sleeved on the grouting pipe 210 and can slide along the grouting pipe 210. A slot is provided on the outer wall of the movable sleeve 231. One end of the claw 2332 is connected to the slot and the other end is connected to the connecting ring 2331. One end of the pulling portion 2333 is connected to the connecting ring 2331 and the other end extends outside the latch hole 30. By pulling the pulling portion 2333 outside the latch hole 30, the connecting ring 2331 can be pulled to slide along the grouting pipe 210, and then the movable sleeve 231 is driven to move in a direction away from the support plate 120 through the claw 2332. Specifically, the pulling portion 2333 can be a rope. Of course, the pulling portion 2333 can also be a rod structure.

[0058] See also Figure 1 , Figure 3 and Figure 4In one embodiment, the auxiliary support mechanism 10 further includes a one-way component 300, the number of which is consistent with the number of the support plates 120, and each one-way component 300 is correspondingly arranged at the first grouting hole 122 of a support plate 120, and the one-way component 300 is used to realize the one-way flow of the fluid from the grouting component 200 to the first grouting space 302. By setting the one-way component 300, when the grouting joint 220 and the butt joint 123 are unlocked, the one-way component 300 can effectively cover the first grouting hole 122, avoid the backflow of concrete in the first grouting space 302, and facilitate the continued use of the grouting component 200 to grout the second grouting space 304.

[0059] Specifically, the one-way assembly 300 includes a cover plate 310, a one-way elastic member 320 and a one-way connector 330. The cover plate 310 is located on the side of the support plate 120 that is away from the butt joint 123, and the cover plate 310 can cover the first grouting hole 122. The support plate 120 is provided with a mounting hole 125, one end of the one-way connector 330 is arranged in the mounting hole 125 through the one-way elastic member 320, and the other end is connected to the cover plate 310, and the one-way elastic member 320 applies an elastic force toward the butt joint 123 to the cover plate 310 through the one-way connector 330.

[0060] like Figure 3 As shown, the one-way component 300 is in a closed state. Figure 4 As shown, the one-way assembly 300 is in an open state. When grouting is performed to the first grouting hole 122 through the grouting pipe 210, concrete is pushed onto the cover plate 310, so that the cover plate 310 moves in a direction opposite to the corresponding grouting pipe 210, and the first grouting hole 122 is released from the cover, and the one-way elastic member 320 stores energy. After the grouting is completed, the pressure on the side of the cover plate 310 facing the first grouting hole 122 is reduced, and the one-way elastic member 320 releases the stored energy, so that the cover plate 310 covers the first grouting hole 122.

[0061] In this embodiment, the number of the one-way connectors 330 is at least two, and each one-way connector 330 is arranged at intervals around the cover plate 310. The number of the one-way elastic members 320 is consistent with the number of the mounting holes 125 and the number of the one-way connectors 330. Each one-way connector 330 is correspondingly installed in a mounting hole 125 through a one-way elastic member 320. By providing at least two one-way connectors 330, the stability of the movement of the cover plate 310 can be improved.

[0062] In other embodiments, the one-way component 300 may also be in other structural forms, as long as it can achieve one-way grouting of the first grouting space 302 .

[0063] In one embodiment, the first grouting hole 122 is located at a position of the support plate 120 near the top wall of the pin hole 30, and the exhaust hole 121 is located above the first grouting hole 122. Specifically, the cover plate 310 can cover the exhaust hole 121 and the first grouting hole 122 at the same time. By arranging the exhaust hole 121 and the first grouting hole 122 above the support plate 120, it is convenient to discharge the gas in the first grouting space 302 during grouting, thereby ensuring the density of the grouting. By covering the exhaust hole 121 and the first grouting hole 122 at the same time by the cover plate 310, it is possible to ensure the closure of the first grouting space 302 after grouting, thereby ensuring the pressure of the concrete in the first grouting space 302, and improving the structural stability in the first grouting space 302 after solidification.

[0064] See also Figures 1 to 3 In one embodiment, the auxiliary support mechanism 10 further includes two end caps 400 and two positioning rods 500. The two positioning rods 500 are respectively installed on the side of the corresponding support plate 120 facing away from the first grouting space 302. The end caps 400 are installed on the positioning rods 500 and spaced apart from the support plate 120. The two end caps 400 are both provided with second grouting holes 410. The grouting pipes 210 are inserted into the second grouting holes 410. The space between the end caps 400 and the support plate 120 forms the second grouting space 304. In the conventional method of supplementing the pin hole 30 of the pier column 20, it is generally necessary to install the grouting joint on the outer wall of the pier column 20, which is not only inconvenient to install but also will damage the surface structure of the pier column 20 again. In the present application, by arranging the end cap 400 on the positioning rod 500, the pin hole 30 can be divided into two second grouting spaces 304 and one first grouting space 302 by using two support plates 120 and two end caps 400, without considering how to install the joint of the grouting pipe 210 on the outer surface of the pier 20. When grouting into the second grouting space 304, the space formed between the end cap 400 and the support plate 120 can be used to increase the grouting pressure in the second grouting space 304 and improve the structural stability after grouting.

[0065] Specifically, the cross-sectional dimension of the end cap 400 tends to decrease in the direction toward the support plate 120, and the position where the end cap 400 has the largest dimension is interference-fitted with the pin hole 30. By setting the end cap 400 to a conical structure or a structure approximately conical, the installation of the end cap 400 is facilitated, and the sealing degree of the second grouting space 304 is ensured, so as to stabilize the grouting pressure of the concrete in the second grouting space 304.

[0066] In this embodiment, the end cap 400 is spaced apart from the outer wall of the pier 20. For example, in this embodiment, the distance between the end cap 400 and the outer wall of the pier 20 is less than 6 cm. This distance can leave space for the displacement and deformation of the end cap 400, and finally the space between the end cap 400 and the opening of the pin hole 30 can be filled.

[0067] In this embodiment, the positioning rod 500 is a threaded rod, and the end cap 400 is threadedly connected to the positioning rod 500. In other embodiments, the positioning rod 500 can also be a pin, and the end cap 400 can be installed on the positioning rod 500 by a buckle structure.

[0068] In one embodiment, the end cover 400 is also provided with an exhaust hole 121, and the exhaust hole 121 is used to discharge the gas in the second grouting space 304 to ensure the density of the grouting.

[0069] In one embodiment, the second grouting hole 410 on the end cover 400 is arranged opposite to the first grouting hole 122 to facilitate the insertion of the grouting pipe 210. When the grouting joint 220 and the butt joint 123 are unlocked, the grouting joint 220 can be pulled out from the second grouting hole 410, or it can be left in the second grouting space 304 without being pulled out.

[0070] See also Figure 5 In one embodiment, a safety monitor 420 is provided on the side of the end cover 400 facing the support plate 120, and the safety monitor 420 is used to sense the stress and / or strain of the concrete in the second grouting space 304. Since the position of the latch hole 30 is a weak position of the pier 20 structure, by providing the safety monitor 420, it is possible to monitor the changes in stress and / or strain of the pier 20 in use at the position of the latch hole 30 after the construction is completed. For example, the safety monitor 420 can be a stress detection sheet, which determines whether the concrete in the latch hole 30 will collapse by detecting the stress changes in the second grouting space 304. Of course, the safety monitor 420 can also be a strain detection sheet, or can be a device that detects stress and strain at the same time.

[0071] See also Figure 1 and Figure 2 In one embodiment, the auxiliary support mechanism 10 further includes a reinforcement member 600, which is mounted on the positioning rod 500, and is located between the end cap 400 and the support plate 120, and is spaced apart from the end cap 400 and the support plate 120. After the construction is completed, the reinforcement member 600 is embedded in the concrete of the second grouting space 304. By providing the reinforcement member 600, the structural strength of the second grouting space 304 can be further improved, thereby improving the structural strength of the pier 20.

[0072] Specifically, the reinforcement member 600 includes two reinforcing mesh plates 610 arranged at intervals, wherein one reinforcing mesh plate 610 is located 12 cm to 20 cm from the surface of the pier column 20, and the other reinforcing mesh plate 610 is located 8 cm to 12 cm from the surface of the pier column 20. During construction, the outer edge of the reinforcing mesh plate 610 can be welded to the hole wall of the latch hole 30, and then grouting is performed, which can enhance the pouring strength. By controlling the spacing between the two reinforcing mesh plates 610 and the surface of the pier column 20, the possibility of concrete collapse from the hole mouth of the latch hole 30 can be further reduced. For example, in this embodiment, the diameter of the latch hole 30 is 21 cm, and the diameter of the pier column 20 is 1.5 m to 2 m. It can be controlled that one reinforcing mesh plate 610 is located 15 cm from the surface of the pier column 20, and the other reinforcing mesh plate 610 is located 10 cm from the surface of the pier column 20.

[0073] In another embodiment, the reinforcement member 600 further includes a connecting frame, which connects the two reinforcement mesh plates 610 to improve the structural reliability of the reinforcement member 600. In other embodiments, the connecting frame can be omitted.

[0074] See also Figure 7 and Figure 8 In one embodiment, the auxiliary support mechanism 10 further includes a construction platform 700, which includes a platform portion 710 and an overlap portion 720. One end of the overlap portion 720 is mounted on the top of the pier 20, and the other end is connected to the platform portion 710. The platform portion 710 is located at the pin hole 30 of the pier 20. By building the construction platform 700, it is convenient to insert the support assembly 100 and other structures into the pin hole 30, and it is convenient to inject grout into the pin hole 30, so as to provide an operation support space for the construction operation.

[0075] See also Figure 1 and Figure 2 A construction method for filling the pier column pin hole, using the auxiliary support mechanism 10 in any of the above embodiments. Specifically, the construction method includes:

[0076] S1: Clean the wall of the pin hole 30 of the pier column 20. By cleaning the wall of the pin hole 30, the adhesion between the concrete and the wall of the pin hole 30 is improved.

[0077] S2: The two grouting assemblies 200 are respectively unlockably mounted on the butt joints 123 of the support plates 120 of the two support assemblies 100; the support assemblies 100 are inserted into the latch hole 30 and arranged at the middle position of the latch hole 30. Since the support assemblies 100 are located in the middle position in the latch hole 30, it is not convenient for installation operation, so the grouting assemblies 200 can be connected to the support plate 120 outside the latch hole 30.

[0078] S3: inject concrete into the first grouting space 302 and maintain the first grouting pressure. Specifically, inject concrete into the first grouting space 302 through the grouting assembly 200. Maintaining the first grouting pressure facilitates ensuring the density of the grouting, thereby ensuring the structural reliability after grouting.

[0079] S4: After the first grouting space 302 is filled with concrete, concrete is poured into the second grouting space 304, and the second grouting pressure is maintained until the second grouting space 304 is filled, wherein the first grouting pressure is greater than the second grouting pressure. This prevents the second grouting pressure from being too high, causing the concrete to collapse from the hole opening of the pin hole 30, while the first grouting pressure is relatively high, which can increase the concrete pressure in the middle of the pin hole 30 and enhance the stability of the supplementary pouring structure.

[0080] Specifically, step S4 includes:

[0081] S41: After the first grouting space 302 is filled with concrete, the strength of the concrete in the first grouting space 302 is detected;

[0082] S42: When the concrete strength in the first grouting space 302 reaches a preset strength, concrete is started to be injected into the second grouting space 304 .

[0083] For example, when the strength of the concrete in the first grouting space 302 reaches 60%-70%, the support plate 120 will no longer move or deform significantly, and concrete begins to be injected into the second grouting space 304. In other embodiments, steps S41 and S42 may also be omitted.

[0084] Furthermore, step S4 further includes:

[0085] S43: After the first grouting space 302 is filled with concrete, the locking of the butt joint 123 with the support plate 120 is released by pulling the pulling member 233 of the quick lock unit 230 of the grouting assembly 200;

[0086] S44: injecting concrete into the second grouting space 304 through the grouting assembly 200 .

[0087] When the support assembly 100 and the grouting assembly 200 are both arranged in the latch hole 30, it is inconvenient to unlock the grouting joint 220 and the butt joint 123. When unlocking, the pulling member 233 is pulled outside the latch hole 30 to compress the locking elastic member 234, and the movable sleeve 231 is not pressed against the locking body 232. At this time, the grouting pipe 210 is pulled outward, and the locking body 232 can move outward along the direction of the movable hole 221 to disengage from the locking groove 124 of the butt joint 123, so that the grouting joint 220 can be pulled away from the butt joint 123. The unlocking operation is simple and convenient, avoiding the limitation of the narrow space of the latch hole 30.

[0088] In one embodiment, the construction method further comprises:

[0089] S5: Detecting the concrete strength in the second grouting space 304;

[0090] S6: When the concrete strength in the second grouting space 304 reaches a stable strength, obtaining initial stress and / or strain data of the end cover 400;

[0091] S7: collecting current stress and / or strain data of the end cover 400, and determining a change value of the stress and / or strain of the end cover 400 according to the initial stress and / or strain data;

[0092] S8: When the change value is greater than the alarm threshold, an alarm is issued.

[0093] Since the position of the pin hole 30 is a weak position in the structure of the pier 20, after the construction is completed, the safety monitor 420 can monitor the changes in stress and / or strain of the pier 20 at the position of the pin hole 30, and issue an alarm in time when the change value is greater than the alarm threshold, thereby playing a role in safety warning.

[0094] The auxiliary support mechanism 10 and construction method for the grouting of the pier column pin hole above maintain the first grouting pressure greater than the second grouting pressure to avoid the second grouting pressure being too large, which causes the concrete to collapse from the hole mouth of the pin hole 30. By increasing the first grouting pressure, the concrete pressure in the middle of the pin hole 30 can be increased, and the stability of the grouting structure can be enhanced. At the same time, the support assembly 100, the reinforcement 600 and the end cover 400 are all embedded in the reinforced concrete. The support assembly 100, the reinforcement 600 and the end cover 400 can further enhance the structural strength of the grouting structure, thereby improving the overall structural strength of the pier column 20.

[0095] In this application, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0096] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0097] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0098] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An auxiliary support mechanism for grouting of pier column pin holes, characterized in that: The auxiliary support mechanism comprises: A support assembly, the support assembly comprising a connecting rod and two support plates arranged relatively at intervals, the connecting rod being located between the two support plates, and the opposite ends of the connecting rod being respectively connected to the two support plates, the two support plates being provided with exhaust holes and first grouting holes arranged at intervals from the exhaust holes, and the space between the two support plates forming a first grouting space; the support assembly being used to be inserted into the pin hole of the pier column, wherein the side of one of the support plates facing away from the other support plate forming a second grouting space; and Grouting assemblies, the number of which is consistent with the number of the support plates, each of which can be unlocked and docked at the first grouting hole of the corresponding support plate, and the grouting assembly is located on the side of the docked support plate facing away from the other support plate; Wherein, the grouting assembly comprises a grouting pipe, a grouting joint and a quick-locking unit, wherein the grouting joint is connected to one end of the grouting pipe; the quick-locking unit comprises a movable sleeve, a locking body, a pulling member and a locking elastic member, a movable hole penetrating through the inner wall of the grouting joint is provided on the outer wall, the locking body is arranged in the movable hole and can move along the axial direction of the movable hole, a butt joint is formed on the side of the support plate facing away from the first grouting space, the butt joint can be butt-jointed with the grouting joint, a locking groove is provided on the outer wall of the butt joint, the movable sleeve is sleeved on the grouting joint, and the locking elastic member is arranged on the grouting joint and provides elastic force for the movable sleeve to slide in the direction of the movable hole; When the butt joint is inserted into the grouting joint, the movable sleeve can slide toward the direction of the support plate and cover the movable hole under the action of the locking elastic member, so that the movable sleeve presses part of the locking body into the locking groove to lock the butt joint and the grouting joint; one end of the pulling member is arranged on the movable sleeve, and the other end extends out of the pin hole along the grouting pipe, and the pulling member can drive the movable sleeve to move in the direction away from the support plate to unlock the butt joint and the grouting joint.

2. The auxiliary support mechanism according to claim 1, characterized in that: The auxiliary support mechanism also includes a one-way component, the number of which is consistent with the number of the support plates, and each of the one-way components is correspondingly arranged at a first grouting hole of the support plate. The one-way component is used to realize one-way flow of fluid from the grouting component to the first grouting space.

3. The auxiliary support mechanism according to claim 1, characterized in that: The pulling member includes a connecting ring, a claw and a pulling part. The connecting ring is sleeved on the grouting pipe and can slide along the grouting pipe. A slot is provided on the outer wall of the movable sleeve. One end of the claw is connected to the slot and the other end is connected to the connecting ring. One end of the pulling part is connected to the connecting ring and the other end extends out of the pin hole.

4. The auxiliary support mechanism according to claim 1, characterized in that: The auxiliary support mechanism also includes two end covers and two positioning rods, the two positioning rods are respectively installed on the side of the corresponding support plate facing away from the first grouting space, the end cover is installed on the positioning rod and is spaced apart from the support plate, the cross-sectional size of the end cover tends to decrease along the direction toward the support plate, the position where the end cover has the largest size is interference fit with the pin hole, and the end cover is spaced apart from the outer wall of the pier; second grouting holes are opened on the two end covers, the grouting pipe is inserted into the second grouting holes, and the space between the end cover and the support plate forms the second grouting space.

5. The auxiliary support mechanism according to claim 4, characterized in that: A safety monitor is provided on a side of the end cover facing the support plate, and the safety monitor is used to sense the stress and / or strain of concrete in the second grouting space.

6. The auxiliary support mechanism according to claim 4 or 5, characterized in that: The auxiliary support mechanism also includes a reinforcement member, which is installed on the positioning rod, and the reinforcement member is located between the end cover and the support plate, and is spaced apart from the end cover and the support plate, and the reinforcement member includes two spaced apart reinforcement mesh plates, one of which is located 12 cm-20 cm away from the pier surface, and the other reinforcement mesh plate is located 8 cm-12 cm away from the pier surface; and / or The auxiliary support mechanism also includes a construction platform, which includes a platform part and an overlapping part. One end of the overlapping part is installed on the top of the pier column, and the other end is connected to the platform part. The platform part is located at the pin hole of the pier column.

7. A construction method for grouting of pier column pin holes, using the auxiliary support mechanism for grouting of pier column pin holes as claimed in claim 1, characterized in that: The construction method comprises: The support assembly is inserted into the latch hole and arranged at the middle position of the latch hole; injecting concrete into the first grouting space and maintaining the first grouting pressure; After the first grouting space is filled with concrete, concrete is poured into the second grouting space, and the second grouting pressure is maintained until the second grouting space is filled, wherein the first grouting pressure is greater than the second grouting pressure.

8. The construction method for supplementary pouring of pier column pin holes according to claim 7, characterized in that: After the first grouting space is filled with concrete, pouring concrete into the second grouting space comprises: After the first grouting space is filled with concrete, detecting the strength of the concrete in the first grouting space; When the concrete strength in the first grouting space reaches a preset strength, concrete is poured into the second grouting space.

9. The construction method for supplementary pouring of pier column pin holes according to claim 8, characterized in that: The method of inserting the support assembly into the latch hole and arranging the support assembly at the middle position of the latch hole comprises: The two grouting assemblies are respectively unlockably mounted on the butt joints of the support plates of the two support assemblies; The step of injecting concrete into the first grouting space comprises: injecting concrete into the first grouting space through the grouting assembly; After the first grouting space is filled with concrete, pouring concrete into the second grouting space comprises: When the first grouting space is filled with concrete, the locking of the butt joint with the support plate is released by pulling the pulling piece of the quick lock unit of the grouting assembly; Concrete is injected into the second grouting space through the grouting assembly.

10. The construction method for supplementary pouring of pier column pin holes according to claim 8 or 9, characterized in that: The auxiliary support mechanism also includes two end covers and two positioning rods, the two positioning rods are respectively installed on the side of the corresponding support plate facing away from the first grouting space, the end cover is installed on the positioning rod and is spaced apart from the support plate, the cross-sectional size of the end cover tends to decrease along the direction toward the support plate, the position where the end cover has the largest size is interference fit with the pin hole, and the end cover is spaced apart from the outer wall of the pier; a second grouting hole is opened on the two end covers, the grouting pipe is passed through the second grouting hole, and the space between the end cover and the support plate forms the second grouting space; a safety monitor is provided on the side of the end cover facing the support plate, and the safety monitor is used to sense the stress and / or strain of concrete in the second grouting space; The method further comprises the following steps: until the second grouting space is filled up: Testing the concrete strength in the second grouting space; When the concrete strength in the second grouting space reaches a stable strength, obtaining initial stress and / or strain data of the end cover; Collect current stress and / or strain data of the end cap; Determine the change value of the stress and / or strain of the end cap according to the initial stress and / or strain data; When the change value is greater than the alarm threshold, an alarm will be issued.

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