High-pier bearing pre-buried hole pre-buried part and pre-buried method

Abstract

The present application relates to the technical field of highway, railway, municipal bridge high pier construction, especially to a high pier bearing pre-buried hole pre-buried part and pre-buried method. The present application comprises the following construction steps: designing the installation position of the pier column pre-buried hole pre-buried part for guiding the on-site construction, pouring forming operation, including binding reinforcement, formwork installation, pouring concrete, vibrating and compacting, and product maintenance, carrying out special design on the reinforcement avoidance of the pre-buried hole position, installing the pre-buried part on the positioning and locking device, and then locking the pre-buried part by using the positioning and locking device. The information construction is convenient for construction scheme design and construction guidance, simplifies the preparation work in the early stage of construction, and solves the problem that the upper and lower spacing of the design horizontal stirrup is less than the height of the pre-buried part in the avoidance treatment of binding reinforcement in the pouring construction, so that the overall stress strength and actual strength of the reinforcement at the reserved hole position meet the requirements, the positioning and locking device can improve the construction precision, reduce the displacement of the pre-buried part during pouring, and improve the construction quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of highway, railway, municipal bridge high pier construction, in particular to a high pier load-bearing pre-buried hole pre-buried part and a pre-buried method. BACKGROUND

[0002] The high pier is an important supporting structure of the highway, railway and municipal bridge, and the quality of the high pier construction directly affects the safety and durability of the bridge during use. According to the height of the pier, the high pier bridge can be divided into three categories, including small high pier bridge (40m<H<80m), medium high pier bridge (80m<H<100m) and large high pier bridge (H>100m). The pier of the high pier bridge generally adopts a hollow thin-walled pier, and the cross-sectional form also has many types, including the common equal cross-section single thin-walled hollow pier, variable cross-section single thin-walled hollow pier and equal cross-section double thin-walled hollow pier.

[0003] In recent years, the expressway in China has developed rapidly, and the highway construction has begun to extend to mountainous areas. In these areas, the mountains are steep, the height difference is large, and the site is narrow, so the high pier structure is widely used in bridge construction. The traditional support construction needs to set up a large amount of scaffold, which not only consumes a large amount of manpower and material resources, but also has complex procedures, slow progress and low safety factor.

[0004] At present, the high pier construction of the bridge generally adopts two methods of turnover form and hydraulic climbing form. Compared with the turnover form method, the hydraulic climbing form method has the characteristics of simple structure, easy installation, convenient operation, high safety degree, fast construction speed and low labor input, and is the commonly used wall climbing form technology at home and abroad.

[0005] However, the traditional hydraulic climbing form construction needs to rely on pre-buried climbing cone, guide rail, reversing box, short-stroke jacking cylinder and other components to realize the overall lifting of the frame body. The disadvantages in the construction process include that the one-time consumable parts such as the pre-buried climbing cone increase the construction cost, the installation precision of the pre-buried climbing cone is not high, the positioning is complex and the deformation and displacement are easy to occur in the construction process. SUMMARY

[0006] In order to reduce the consumption of the pre-buried part, reduce the construction cost, simplify the construction, improve the construction quality and improve the safety factor of the construction, the present application provides a high pier load-bearing pre-buried hole pre-buried part and a pre-buried method.

[0007] On the one hand, the present application provides a high pier load-bearing pre-buried hole pre-buried part and a pre-buried method, which adopts the following technical scheme:

[0008] A high pier load-bearing pre-buried hole pre-buried part and a pre-buried method, including the following construction steps:

[0009] The position of the pier column load-bearing pre-buried hole is designed by using BIM simulation software, and finite element simulation analysis is carried out by using BIM simulation software;

[0010] using BIM design drawings to guide the site construction;

[0011] installing on the formwork according to the design installation position of the embedded part;

[0012] performing the pouring forming operation of the pier column according to the design size and shape of the pier column;

[0013] wherein the pouring construction tool comprises binding steel bars, formwork installation, pouring concrete, vibrating and compacting, finished product maintenance, and removing the formwork and the embedded part;

[0014] When the steel bars are bound, the steel bars are treated to avoid the design installation position of the embedded part;

[0015] When the formwork is erected, an installation hole is reserved on the formwork according to the design installation position of the embedded part, a positioning and locking device is installed outside the installation hole of the formwork, the embedded part is installed on the positioning and locking device, and then the embedded part is locked by using the positioning and locking device.

[0016] By adopting the above technical scheme, information construction is realized by using BIM to assist the construction, which facilitates the design and guidance of the construction scheme, simplifies the preparation work in the early stage of the construction, solves the problem that the upper and lower spacing of the design horizontal stirrup is less than the height of the embedded part during the binding of the steel bars in the pouring construction, and minimizes the interference of the embedded part on the overall structural integrity of the steel bars, so as to ensure that the overall stress strength and the actual strength of the steel bars at the reserved hole position meet the design requirements. The positioning and locking device can improve the construction precision, reduce the displacement of the embedded part during pouring, and improve the construction quality.

[0017] Preferably, a site bearing destructive test is performed on the bearing embedded hole before the pouring construction, and the site bearing destructive test comprises testing the ultimate load of the surrounding concrete of the embedded hole in a cracking or crushing state and whether the embedded part cracks or breaks in the cracking or crushing state of the concrete.

[0018] By adopting the above technical scheme, the bearing destructive test can calculate and predict the bearing capacity of the embedded part and the embedded hole, prevent the embedded part and the embedded hole from being damaged due to bearing a large load during the construction, and finally cause a serious construction accident.

[0019] Preferably, the site bearing destructive test comprises a simply supported test scheme and a cantilever test scheme, and the simply supported test scheme and the cantilever test scheme respectively apply pressure moments to the test bearing embedded hole by using a simply supported rod and a cantilever rod.

[0020] By adopting the above technical scheme, the simply supported test scheme and the cantilever test scheme can simulate two force conditions of the embedded part in actual use, analyze the two conditions respectively, and comprehensively judge the safe bearing range of the embedded part and the embedded hole.

[0021] Preferably, the pier pouring construction adopts layered pouring, the concrete strength required to reach the target strength is tested and calculated before pouring, and the pouring time is marked at the embedded part for controlling the form removal time.

[0022] By adopting the above technical scheme, the time required for the concrete strength to reach the target strength is tested and calculated, the time for waiting for the concrete to harden in actual construction is determined, and construction safety and quality accidents caused by substandard concrete strength are prevented.

[0023] Preferably, the avoiding treatment step includes position marking, design and manufacture of avoiding stirrups, cutting of design stirrups, and welding and bending of stirrups, wherein the avoiding stirrups are bent from continuous reinforcement and butt-jointed into hexagonal stirrups, the design stirrups are cut to a length consistent with the width of the embedded part, and the maximum length of the hexagonal stirrups is 2-4 times the width of the embedded part.

[0024] By adopting the above technical scheme, the hexagonal stirrups can effectively fix the embedded part and simultaneously effectively connect the reinforcement cage, ensuring the strength and integrity of the reinforcement cage, and the hexagonal stirrups are convenient to manufacture and can utilize waste materials on the construction site.

[0025] Preferably, the reserved mounting hole and the positioning locking device are sealed, and the positioning locking device and the embedded part are sealed, and the positioning locking device is supported and fixed by an inclined support rod, and the size of the reserved mounting hole is between the positioning locking device and the embedded part.

[0026] By adopting the above technical scheme, the sealing treatment can effectively prevent slurry leakage during pouring and improve the sealing performance of the formwork.

[0027] Preferably, the pouring concrete step includes spraying a release agent on the inner surface of the formwork, layered pouring, layered vibrating, and water spraying curing, the spraying area on the inner surface of the formwork mainly includes the joint between the formwork and the foundation and the joint between the formwork and the embedded part, and during the water spraying curing, water is continuously sprayed into the joint gap of the formwork lamination surface, and the formwork is disassembled after sufficient penetration.

[0028] By adopting the above technical scheme, surface spraying can handle the grouting compactness of details such as joints, and water spraying curing can improve the pouring quality and facilitate demolding.

[0029] On the other hand, the high-pier load-bearing embedded part provided by the present application adopts the following technical scheme:

[0030] The utility model provides a high pier bearing pre -buried hole pre -buried part, including pre -buried board and locating plate, pre -buried board includes stretch into board, facade board and installation head, stretch into board and installation head set up at facade board both sides respectively, stretch into board is inclined downward and is 10 with facade board Angle 15, the center of locating plate is opened locating groove, pre -buried board is installed in locating groove, the detachable setting of locating plate has locking lever, locking lever sets up respectively in the upper and lower both ends of locating groove, and pre -buried board size is higher than bearing wedge lower part 2cm, 3cm deep.

[0031] Through adopting the technical scheme, the stretch into board is inclined downward, so that the force direction in use is the wedge direction, the stability of the pre -buried part is improved, the locating plate can effectively improve the installation accuracy of the pre -buried board, and the locating plate can be repeatedly used, so that the consumables are reduced, the locking lever is used for locking the pre -buried board, and the displacement of the pre -buried board during pouring is reduced.

[0032] Preferably, one side of the locking lever is hinged to the locating plate, and the other side is detachably connected to the locating plate by a bolt.

[0033] Through adopting the technical scheme, the detachable locking lever and the locating plate are integrated and installed, so that the recycling of the locating plate is facilitated.

[0034] Preferably, the back surface of the facade board and the template contacting surface of the locating plate are both provided with a rubber covering layer.

[0035] Through adopting the technical scheme, the rubber covering layer is beneficial to sealing and reducing leakage during use.

[0036] To sum up, the utility model has the beneficial technical effects as follows:

[0037] 1. Information construction, through the auxiliary use of BIM in construction, convenient construction scheme design and guide construction, simplify the preparation work before construction, avoid the treatment of binding reinforcement in pouring construction, solve the problem that the upper and lower spacing of design horizontal stirrup is less than the height of pre -buried part, at the same time, as far as possible, reduce the interference of pre -buried part to the overall structure integrity of reinforcement, ensure that the overall stress strength and actual strength of the reinforcement at the reserved hole position meet the design requirements, the positioning and locking device can improve the construction accuracy, at the same time, reduce the displacement of pre -buried part during pouring, improve the construction quality.

[0038] 2, bearing destructive test can calculate and predict the bearing capacity of embedded parts and embedded holes, prevent embedded parts and embedded holes from being damaged by bearing large load during construction, and finally cause serious construction accidents, simply supported test scheme and cantilever test scheme can simulate two situations of force borne by embedded parts in actual use, analyze the two situations respectively, comprehensively judge the safe bearing range of embedded parts and embedded holes, test and calculate the time of concrete strength reaching target strength, and determine the time of waiting for concrete hardening in actual construction, so as to prevent construction safety and quality accidents caused by substandard concrete strength.

[0039] 3, the hexagonal stirrup can effectively fix the embedded part, effectively connect the steel reinforcement cage, ensure the strength and integrity of the steel reinforcement cage, and secondly, the hexagonal stirrup is convenient to process and manufacture, can utilize the waste materials on the construction site, the sealing treatment can effectively prevent the leakage during pouring, improve the sealing property of the formwork, the surface spraying can treat the grouting compactness of the joint details, and the water spraying maintenance can improve the pouring quality and facilitate demolding.

[0040] 4, the downward inclined setting of the extension plate makes the force direction in the use process be the wedge direction, improves the stability of the embedded part, the positioning plate can effectively improve the installation accuracy of the embedded plate, and can be reused, reducing the consumption of materials, the locking rod is used for locking the embedded plate, reducing the displacement of the embedded plate during pouring, the detachable locking rod and the positioning plate are integrated and installed, facilitating the recycling of the positioning plate, and the rubber covering layer is beneficial to sealing and reducing leakage during use. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is the structure diagram of the embedded part of the application;

[0042] Figure 2 is Figure 1 is a schematic view from another perspective;

[0043] Figure 3 is a schematic view of the on-site bearing destructive test device.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] 1, the embedded plate, 11 extension plate, 12 facade plate, 13 mounting head, 2, positioning plate, 21, locking rod, 10, rubber covering layer.

[0046] Figure 3 A is the experimental beam of the simply supported experiment, and B is the experimental beam of the cantilever experiment. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings Figures 1-3 The application will be further described in detail.

[0048] Example 1:

[0049] The embodiment of the application discloses a high-pier load-bearing pre-embedded hole pre-embedded part pre-embedding method, which comprises the following construction steps:

[0050] The position of the pier column load-bearing pre-embedded hole is designed by using a BIM simulation software, and finite element simulation analysis is performed by using the BIM simulation software;

[0051] The BIM design drawing is used to guide the on-site construction;

[0052] The pre-embedded part is installed on the formwork according to the designed installation position of the pre-embedded part;

[0053] The pier column is poured and formed according to the designed size and shape of the pier column;

[0054] The pouring construction comprises binding steel bars, formwork installation, pouring concrete, vibration compaction, product maintenance and formwork and pre-embedded part removal;

[0055] When the steel bars are bound, the steel bars are treated to avoid the pre-embedded part according to the designed installation position of the pre-embedded part;

[0056] When the formwork is erected, a reserved installation hole is reserved on the formwork according to the designed installation position of the pre-embedded part, a positioning and locking device is installed on the outside of the formwork of the reserved installation hole, the pre-embedded part is installed on the positioning and locking device, and then the pre-embedded part is locked by using the positioning and locking device.

[0057] Embodiment 2:

[0058] On the basis of embodiment 1, the following is added:

[0059] Before pouring construction, a field load-bearing destructive test is performed on the load-bearing pre-embedded hole, and the load-bearing destructive test comprises testing the ultimate load of the concrete around the pre-embedded hole in a cracking or crushing state and whether the pre-embedded part cracks or breaks in the cracking or crushing state of the concrete.

[0060] The field load-bearing destructive test comprises a simply supported test scheme and a cantilever test scheme, and the simply supported test scheme and the cantilever test scheme respectively apply pressure moments to the load-bearing pre-embedded hole for testing.

[0061] The pier column pouring construction adopts layer-by-layer pouring, the concrete strength reaching the target strength is tested and calculated before pouring, and the pouring time is marked at the pre-embedded part, so as to control the formwork removal time.

[0062] The avoiding treatment step comprises position marking, design and manufacture of avoiding hoop steel bars, cutting of designed hoop steel bars and welding of bent hoop steel bars, wherein the avoiding hoop steel bars are bent and butt-jointed into hexagonal hoop steel bars from continuous steel bars, the designed hoop steel bars are cut to have a length consistent with the width of the pre-embedded part, and the maximum length of the hexagonal avoiding hoop steel bars is 2-4 times the width of the pre-embedded part.

[0063] The reserved mounting hole is sealed between the positioning locking device and the embedded part, and the positioning locking device is supported and fixed by the inclined support rod, and the size of the reserved mounting hole is between the positioning locking device and the embedded part.

[0064] The pouring concrete step includes spraying release agent on the inner surface of the formwork, layering pouring, layering vibrating, and water spraying maintenance. The spraying area of the inner surface of the formwork mainly includes the joint between the formwork and the foundation and the joint between the formwork and the embedded part. When the water spraying maintenance is performed, the water spraying continuously penetrates into the joint gap of the formwork adhering surface, and the formwork is disassembled after sufficient penetration.

[0065] Simply supported test scheme:

[0066] The inner diameter of the oil cylinder is 200mm, and the effective loading area is 31416mm 2 The relationship between the edge reaction force of the concrete and the oil cylinder pressure is: edge reaction force = oil cylinder pressure / 84 x 60 = 0.714 oil cylinder pressure.

[0067] Cantilever test scheme:

[0068] The inner diameter of the oil cylinder is 200mm, and the effective loading area is 31416mm 2 The relationship between the edge reaction force of the concrete and the oil cylinder pressure is: edge reaction force = oil cylinder pressure / 30 x (24+30) = 1.80 oil cylinder pressure.

[0069] Main test conclusion

[0070] (1) The distance between the hole top and the top surface of the pier is 32cm thick, and the top range of the concrete has no cracking. The actual construction top is about 42cm, and the upper concrete constraint ability of the bearing wedge meets the requirements.

[0071] (2) The internal concrete of the bearing hole has no crushing and cracking phenomenon.

[0072] (3) The distance between the hole edge and the pier edge is 50cm thick, and the concrete on both sides has no splitting phenomenon.

[0073] (4) The lower edge concrete of the bearing hole directly contacts the bearing wedge, and obvious cracking occurs when the converted pressure reaches 20-25 tons. When the converted pressure reaches 40-45 tons, it is crushed.

[0074] Example 3:

[0075] The embodiment of the application discloses a high-pier load-bearing pre-buried hole pre-buried part, which comprises a pre-buried plate 1 and a positioning plate 2, the pre-buried plate 1 comprises an extension plate 11, a facade plate 12 and a mounting head 13, the extension plate 11 and the mounting head 13 are arranged on the two sides of the facade plate 12 respectively, the extension plate 11 is arranged in a downward inclination and forms an angle of 10-15 degrees with the facade plate 12, the positioning plate 2 is provided with a positioning groove in the center, the pre-buried plate 1 is arranged in the positioning groove, the positioning plate 2 is detachably provided with a locking rod 21, the locking rod 21 is arranged on the upper and lower ends of the positioning groove respectively, and the size of the pre-buried plate 1 is 2 cm higher and 3 cm deeper than the lower part of the load-bearing wedge.

[0076] The load-bearing wedge is a load-bearing part inserted into the load-bearing pre-buried hole during the climbing formwork construction.

[0077] One side of the locking rod 21 is hinged on the positioning plate 2, and the other side is detachably connected on the positioning plate 2 through bolts.

[0078] The back surface of the facade plate 12 and the template contacting surface of the positioning plate 2 are both provided with a rubber covering layer 10.

[0079] During installation, the recess is opened on the template, the positioning plate 2 is installed on the recess on the template through measurement and positioning, and the pre-buried plate 1 is installed on the positioning plate 2 and locked through the locking rod 21.

[0080] The above are the preferred embodiments of the application, and the protection scope of the application is not limited by the above, so that: all equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A method for embedding pre-embedded parts in pre-embedded holes for high pier load-bearing structures, characterized in that: The construction steps include the following: The location of the pre-embedded holes for the load-bearing structure of the pier was designed using simulation software such as BIM, and finite element simulation analysis was performed using BIM and other simulation software. Use BIM design drawings to guide on-site construction; Install the embedded parts on the template according to their designed installation positions; The pier columns are cast and shaped according to their design dimensions and shape. The concrete pouring process specifically includes tying reinforcing bars, installing formwork, pouring concrete, vibrating and compacting, curing finished product, and removing formwork and embedded parts. When tying the reinforcing bars, the reinforcing bars are made to avoid the embedded parts according to their designed installation positions. When the template is erected, installation holes are reserved on the template according to the design installation position of the embedded parts. A positioning and locking device is installed on the outside of the template with the reserved installation holes. The embedded parts are installed on the positioning and locking device, and then the positioning and locking device is used to lock the embedded parts. The avoidance process includes location marking, designing and manufacturing avoidance stirrups, cutting the designed stirrups, and welding and bending the stirrups. The avoidance stirrups are made by bending and butt-jointing connected steel bars to form hexagonal stirrups. The cut length of the designed stirrups is consistent with the width of the embedded part, and the maximum length of the hexagonal avoidance stirrups is 2-4 times the width of the embedded part.

2. The method for embedding pre-embedded parts for high pier load-bearing pre-embedded holes according to claim 1, characterized in that: Before pouring construction, an on-site load-bearing destructive test is conducted on the load-bearing pre-embedded hole. The load-bearing destructive test includes testing the ultimate load of the concrete around the pre-embedded hole under cracked or crushed conditions and whether the pre-embedded part exhibits cracks or fractures under cracked or crushed conditions.

3. The method for embedding pre-embedded parts for high pier load-bearing pre-embedded holes according to claim 2, characterized in that: The on-site load-bearing destructive test includes a simply supported test scheme and a cantilever test scheme. The simply supported test scheme and the cantilever test scheme respectively use a simply supported rod and a cantilever rod to apply a pressure torque to the pre-embedded load-bearing hole for the test.

4. The method for embedding pre-embedded parts for high pier load-bearing pre-embedded holes according to claim 1, characterized in that: The pier column pouring construction adopts layered pouring. Before pouring, the time required for the concrete strength to reach the target strength is tested and calculated. The pouring time is marked at the embedded parts to control the formwork removal time.

5. The method for embedding pre-embedded parts for high pier load-bearing pre-embedded holes according to claim 1, characterized in that: The reserved mounting hole and the positioning and locking device, as well as the positioning and locking device and the embedded part, are all sealed. The positioning and locking device is supported and fixed by a diagonal support rod. The size of the reserved mounting hole is between that of the positioning and locking device and the embedded part.

6. The method for embedding pre-embedded parts for high pier load-bearing pre-embedded holes according to claim 1, characterized in that: The concrete pouring steps include spraying a release agent on the inner surface of the formwork, pouring in layers, vibrating in layers, and water curing. The sprayed area on the inner surface of the formwork mainly includes the joint between the formwork and the foundation and the joint between the formwork and the embedded parts. During water curing, the water continuously seeps into the gaps of the formwork's mating surface. After it has fully penetrated, the formwork is removed.

7. A pre-embedded component for a high pier load-bearing pre-embedded hole, characterized in that: The high pier load-bearing pre-embedded hole pre-embedded part is applied to the high pier load-bearing pre-embedded hole pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part pre-embedded part according to any one of the claims 1 to 6. The high pier load-bearing pre-embedded hole pre-embedded part pre-embedded part includes a pre-embedded plate (1) and a positioning plate (2). The pre-embedded plate (11) is inclined downward and forms an angle of 10°-15° with the vertical panel (12). The positioning plate (2) has a positioning groove at its center. The pre-embedded plate (1) is installed in the positioning groove. The positioning plate (2) is detachably provided with a locking rod (21). The locking rod (21) is respectively provided at the upper and lower ends of the positioning groove. The size of the pre-embedded plate (1) is 2cm higher and 3cm deeper than the lower part of the load-bearing wedge.

8. The embedded part for the high pier load-bearing pre-embedded hole according to claim 7, characterized in that: The locking rod (21) is hinged to the positioning plate (2) on one side and detachably connected to the positioning plate (2) on the other side by bolts.

9. The embedded part for the high pier load-bearing pre-embedded hole according to claim 7, characterized in that: The back of the vertical panel (12) and the side of the positioning plate (2) that contacts the template are both provided with a rubber covering layer (10).

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