Multi-point pre-pressing system of high-pier pier top bearing platform

Abstract

A high-pier pier top bearing platform multi-point pre-pressing system comprises a bearing platform, the bearing platform is installed at the top of a pier column, the pier column is provided with two pier bodies, and the two pier bodies are spaced by a certain distance; the multiple anchoring systems are installed at the tops of the two pier bodies of the pier column correspondingly; the counter-force beam is mounted above the bearing platform through an anchoring system; the load applying device comprises a hydraulic pump station and jacks, the hydraulic pump station is placed at the top of the pier column, the multiple jacks are installed between the bearing platform and the counter-force beam, and the hydraulic pump station is connected with the jacks through hydraulic pipelines; and the data acquisition device is used for measuring the downwarping deformation of the bearing platform. Load is applied through the jack to pre-press the bearing platform, and the problems that an existing pre-pressing operation technology is troublesome in operation, low in work efficiency and high in safety risk are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a multi-point preloading system for a high pier top load-bearing platform. Background Art

[0002] At present, continuous rigid frames or continuous beams are often used to cross mountain valleys in large-span bridges. During the construction of such bridges, the load-bearing platform for the pouring construction of the pier top segment often needs to be pre-loaded for bearing capacity testing, and the elevation data for the installation of the platform template is determined through the pre-load test. When the pier column is short, the pre-load pre-load of the load-bearing platform is often selected in the form of pile loading. The pile loading materials are generally water bags, sand bags or prefabricated blocks, etc. However, when the pier column is high, the pile loading pre-load often requires a tower crane for vertical transportation. This method has the following three disadvantages: First, the construction efficiency is very low, the loading and unloading duration is long, and the entire support pre-load takes up a lot of construction time; second, there are great safety risks in the hoisting construction and high-altitude loading, which are highly dangerous and have few effective safeguards; third, it consumes a lot of manpower and material resources, increasing the cost of the entire support construction. In order to improve the efficiency of the support load test and reduce the safety risks during implementation, it is necessary to improve the current process of pre-loading the load-bearing system of the high pier top. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology, and to provide a multi-point pre-stressing system for the load-bearing platform on the top of a high pier, in which the load is applied by a jack to pre-stress the load-bearing platform, thereby solving the problems of the existing pre-stressing operation process, such as cumbersome operation, low efficiency and high safety risk.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a multi-point preloading system for a high pier top load-bearing platform, comprising:

[0005] A load-bearing platform, wherein the load-bearing platform is installed on the top of the pier column, wherein the pier column has two pier bodies, and the two pier bodies are spaced a distance apart;

[0006] Anchoring systems, wherein a plurality of said anchoring systems are respectively installed on the tops of two pier shafts of the pier column;

[0007] A reaction beam, wherein the reaction beam is installed above the load-bearing platform through an anchoring system;

[0008] A load applying device, wherein the load applying device comprises a hydraulic pump station and a jack, wherein the hydraulic pump station is placed on the top of the pier column, and a plurality of jacks are installed between the load-bearing platform and the reaction beam, and the hydraulic pump station and the jack are connected via a hydraulic pipeline;

[0009] A data acquisition device is used to measure the downward deflection of the load-bearing platform.

[0010] The load-bearing platform includes a longitudinal beam and a transverse beam. Steps are respectively arranged on both sides of the top of the pier column. Two longitudinal beams are installed on the steps on both sides. Multiple transverse beams are installed on the two longitudinal beams, and the transverse beams are arranged between the two pier bodies and on the outside of the pier bodies. A load distribution beam is also installed on the transverse beam, and the jack is placed on the load distribution beam.

[0011] The load-bearing platform also includes an unloading device, which is installed on the step and the longitudinal beam is installed on the unloading device.

[0012] The anchoring system includes embedded screws, anchoring beams and fasteners. Each anchoring system includes two embedded screws, anchoring beams are installed on the two embedded screws, and the fasteners are respectively installed on the top of the two embedded screws. The reaction beam is located between the two embedded screws of the anchoring system and on the lower side of the anchoring beam.

[0013] The anchoring system also includes a support pad, which is arranged on the top of the pier body and supports the reaction beam.

[0014] The data acquisition device includes a level, which is arranged on the top of the pier body. A level ruler is arranged on a preset measuring point on the load-bearing platform. The deformation data of each measuring point is observed by the level, so as to measure the downward deflection of the load-bearing platform.

[0015] The data acquisition device also includes a pressure sensor, which is arranged on the top of the jack.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model applies load to the load-bearing platform by means of a jack, thereby solving the problems of the existing pre-pressing operation process, which is cumbersome to operate, low in efficiency and high in safety risk.

[0018] 2. By adopting this system, the time of the bracket load test is greatly shortened, and the load test can be completed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the top view of the preloading system of the utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the AA section structure.

[0022] Figure 3 for Figure 1 Schematic diagram of the BB cross-section structure.

[0023] Figure 4 for Figure 1 Schematic diagram of the CC cross-section structure.

[0024] Figure 5 It is a schematic diagram of the arrangement of measuring points on the load-bearing platform of the preloading system of the utility model.

[0025] In the figure: pier 100, step 101;

[0026] Load-bearing platform 200, unloading device 201, longitudinal beam 202, transverse beam 203, load distribution beam 204;

[0027] Anchoring system 300, embedded screw rod 301, anchoring beam 302, fastener 303, support pad 304;

[0028] Reaction beam 400;

[0029] Load applying device 500, hydraulic pump station 501, jack 502, hydraulic pipeline 503

[0030] Data acquisition device 600 , pressure sensor 601 , measurement point 602 . DETAILED DESCRIPTION

[0031] See also Figure 1-5 , a multi-point preloading system for a high pier top bearing platform, comprising

[0032] The load-bearing platform 200 is installed on the top of the pier column 100. The pier column 100 has two piers, and the two piers are separated by a distance;

[0033] Anchoring system 300, wherein a plurality of anchoring systems 300 are respectively installed on the top of two piers of the pier column 100;

[0034] A reaction beam 400, wherein the reaction beam 400 is installed above the load-bearing platform 200 through an anchoring system 300;

[0035] A load applying device 500, the load applying device 500 comprises a hydraulic pump station 501 and a jack 502, the hydraulic pump station 501 is placed on the top of the pier 100, a plurality of jacks 502 are installed between the load-bearing platform 200 and the reaction beam 400, and the hydraulic pump station 501 and the jack 502 are connected via a hydraulic pipeline 503;

[0036] The data acquisition device 600 is used to measure the deflection deformation of the load-bearing platform 200 .

[0037] The load is applied by the jack 502 to pre-press the load-bearing platform 200, thereby solving the problems of the existing pre-pressing operation process, such as complicated operation, low efficiency and high safety risk.

[0038] See also Figure 2-4The load-bearing platform 200 includes a longitudinal beam 202 and a transverse beam 203. Steps 101 are respectively arranged on both sides of the top of the pier 100. Two longitudinal beams 202 are installed on the steps 101 on both sides. Multiple transverse beams 203 are installed on the two longitudinal beams 202, and the transverse beams 203 are arranged between the two pier bodies and on the outside of the pier bodies; a load distribution beam 204 is also installed on the transverse beam 203, and the jack 502 is placed on the load distribution beam 204.

[0039] The two ends of the longitudinal beam 202 are respectively placed on the steps 101 of the two piers, playing the role of supporting the main beam. Figure 1 , the transverse beam 203 is arranged between the two piers and on the outside of the piers, that is, Figure 1 In order to facilitate walking, support beams are installed on the left and right sides of the pier body respectively, which is convenient for walking. The longitudinal beam 202 and the transverse beam 203 are both made of steel, such as I-beam.

[0040] Furthermore, the load-bearing platform 200 further includes a discharge device 201, which is mounted on the step 101, and a longitudinal beam 202 is mounted on the discharge device 201. The discharge device 201 is also called a discharge block, which is a prior art. The discharge device 201 is placed on the step 101 to support the longitudinal beam 202. This facilitates the removal of the load-bearing platform 200 after pouring in the later stage. During removal, by loosening the nut on the discharge device 201, the height of the discharge device 201 will be reduced, thereby facilitating the removal of the load-bearing platform 200.

[0041] See also Figure 1 , 2 The anchoring system 300 includes a pre-embedded screw rod 301, an anchoring beam 302 and a fastener 303. Each anchoring system 300 includes two pre-embedded screw rods 301, and the two pre-embedded screw rods 301 are mounted with anchoring beams 302. The fasteners 303 are respectively mounted on the tops of the two pre-embedded screw rods 301. The reaction beam 400 is located between the two pre-embedded screw rods 301 of the anchoring system 300 and at the lower side of the anchoring beam 302. Through the above structure, the reaction beam 400 is limited.

[0042] The embedded screw 301 is made of finely rolled threaded steel. When the pier body is cast, the lower end of the embedded screw 301 is embedded in the pier body, and the top of the finely rolled threaded steel is processed with external threads. The fastener 303 includes a pad and a nut. The pad is worn on the embedded screw 301, and the nut is screwed on the top of the embedded screw 301. The anchor beam 302 is two profiles, and a gap is reserved between the two profiles. The embedded screw 301 is located in the gap between the two profiles, and the pad is located on the upper side of the anchor beam 302. The nut limits the pad. The fastener 303 can also adopt other structures. For example, the fastener 303 adopts a square steel plate, and a threaded hole is set in the middle of the square steel plate. The square steel plate is screwed with the embedded screw 301 through the threaded hole.

[0043] For further information, see Figure 2 , 4 The anchoring system 300 further includes a support pad 304, which is disposed on the top of the pier body and supports the reaction beam 400. The support pad 304 is used to support the reaction beam 400 and support the reaction beam 400 at a fixed height to facilitate the placement of the jack 502. The support pad 304 can be made of pipes or wood.

[0044] When the support pad 304 is not provided, it is necessary to place the jack 502 first, and then place the reaction beam 400 on the jack 502 .

[0045] See also Figure 1 , 3 -5, the data acquisition device 600 includes a level, which is set on the top of the pier body. A level rod is set on the preset measuring point 602 on the load-bearing platform 200. The deformation data of each measuring point 602 is observed through the level, so as to measure the downward deflection of the load-bearing platform 200. When used, a level rod of a certain height is glued on each preset measuring point 602, the level rod is fixed longitudinally, and a scale is set on the level rod. After the jack 502 is pressurized to the rated pressure, the pressure is maintained. The scale changes of each level rod before and after the pressure are observed through the level, so as to calculate the downward deflection of each measuring point 602 on the load-bearing platform 200, so as to judge the overall deformation of the load-bearing platform 200. When the pressure is pressed, the pressure of the jack 502 can be observed through the pressure gauge on the hydraulic pump station 501.

[0046] Furthermore, the data acquisition device 600 further includes a pressure sensor 601, which is disposed on the top of the jack 502. The pressure applied by each jack 502 can be measured more intuitively through the pressure sensor 601.

[0047] Preferably, the pressure sensor 601 can be a R160U standard source pressure sensor manufactured by Changzhou Ruierte Measurement and Control System Co., Ltd. The pressure sensor 601 is connected to a matching instrument to read data.

[0048] The working principle or use process of the utility model:

[0049] Reference Figure 1 Steps 101 are respectively arranged on the left and right sides of the top of the two piers of the pier column 100, and three sets of anchoring systems 300 are respectively embedded in the top of the pier. Figure 4 Two unloading devices 201 are placed on each step 101, the two ends of the longitudinal beam 202 are placed on the steps 101 of the two piers, the transverse beam 203 is set between the two piers and on the outside of the piers, and the load distribution beam 204 is installed on the transverse beam 203. In addition, support beams are installed on the left and right sides of the pier for easy walking.

[0050] See also Figure 4 A support pad 304 is placed between two embedded screws 301 of each anchoring system 300, and the reaction beam 400 is placed on the support pad 304 between the two embedded screws 301 corresponding to the two piers, and then installed on the anchoring beam 302 and the fastener 303, and the fastener 303 is tightened to fix the reaction beam 400.

[0051] Afterwards, a jack 502 is placed between the load distribution beam 204 and the reaction beam 400. The hydraulic pump station 501 can be one or more. The hydraulic pump station 501 is placed on the top of the pier body and connected to each jack 502 through a hydraulic pipe 503. The pressure sensor 601 is installed on the top of the jack 502 or the bottom of the reaction beam 400. The jack 502 is pressed by the hydraulic pump station 501. When the pressure sensor 601 detects that the preset pressure value has been reached, the jack 502 maintains the pressure. The scale changes of each level ruler before and after the pressure are observed by the level, so as to calculate the downward deflection of each measuring point 602 on the load-bearing platform 200, so as to judge the overall deformation of the load-bearing platform 200.

Claims

1. A multi-point preloading system for a high pier top load-bearing platform, characterized in that: include: A load-bearing platform (200), the load-bearing platform (200) being installed on the top of a pier column (100), the pier column (100) having two pier bodies, the two pier bodies being spaced apart by a distance; An anchoring system (300), wherein a plurality of the anchoring systems (300) are respectively installed on the tops of two pier bodies of the pier column (100); A reaction beam (400), wherein the reaction beam (400) is installed above the load-bearing platform (200) via an anchoring system (300); A load applying device (500), the load applying device (500) comprising a hydraulic pump station (501) and a jack (502), the hydraulic pump station (501) being placed on the top of the pier column (100), a plurality of jacks (502) being installed between the load-bearing platform (200) and the reaction beam (400), the hydraulic pump station (501) and the jacks (502) being connected via a hydraulic pipeline (503); A data acquisition device (600) is used to measure the deflection deformation of a load-bearing platform (200).

2. A multi-point preloading system for a high pier top load-bearing platform according to claim 1, characterized in that: The load-bearing platform (200) comprises a longitudinal beam (202) and a transverse beam (203); steps (101) are respectively arranged on both sides of the top of the pier column (100); two longitudinal beams (202) are installed on the steps (101) on both sides; a plurality of transverse beams (203) are installed on the two longitudinal beams (202); and the transverse beams (203) are arranged between the two pier bodies and on the outside of the pier bodies; a load distribution beam (204) is also installed on the transverse beam (203); and a jack (502) is placed on the load distribution beam (204).

3. A multi-point preloading system for a high pier top load-bearing platform according to claim 2, characterized in that: The load-bearing platform (200) further comprises a discharge device (201), wherein the discharge device (201) is mounted on the step (101), and the longitudinal beam (202) is mounted on the discharge device (201).

4. A multi-point preloading system for a high pier top load-bearing platform according to claim 1, characterized in that: The anchoring system (300) comprises a pre-embedded screw rod (301), an anchoring beam (302) and a fastener (303). Each anchoring system (300) comprises two pre-embedded screw rods (301), the two pre-embedded screw rods (301) are mounted with the anchoring beam (302), the fasteners (303) are respectively mounted on the top of the two pre-embedded screw rods (301), and the reaction beam (400) is located between the two pre-embedded screw rods (301) of the anchoring system (300) and at the lower side of the anchoring beam (302).

5. A multi-point preloading system for a high pier top load-bearing platform according to claim 4, characterized in that: The anchoring system (300) further comprises a support pad (304), which is arranged on the top of the pier body and supports the reaction beam (400).

6. The multi-point preloading system for the load-bearing platform on the top of a high pier according to claim 1, characterized in that: The data acquisition device (600) comprises a level, which is arranged on the top of the pier body. A level ruler is arranged on a preset measuring point (602) on the load-bearing platform (200). The deformation data of each measuring point (602) is observed by the level, thereby measuring the downward deflection of the load-bearing platform (200).

7. A multi-point preloading system for a high pier top load-bearing platform according to claim 6, characterized in that: The data acquisition device (600) further comprises a pressure sensor (601), wherein the pressure sensor (601) is arranged on the top of the jack (502).

Images