A cap system with a counter-pressure structure and a construction method thereof

Abstract

The present invention discloses a cap system with a counter-pressure structure and a construction method thereof, and relates to the technical field of bridge pier reinforcement. The cap system with a counter-pressure structure includes a bridge pier, a pile foundation, a distribution member, a jacking member and a reaction member. The pile foundation and the bridge pier are both extended and arranged in a vertical direction, the distribution member is fixedly installed on the top of the pile foundation, the reaction member is arranged above the distribution member and fixedly installed on the side of the bridge pier, the reaction member is connected to the distribution member through the jacking member, and the jacking member can lift the bridge pier upward through the reaction member to transfer part of the load of the bridge pier to the pile foundation through the distribution member. Compared with the prior art, the cap system with a counter-pressure structure provided by the present invention adopts a distribution member installed on the top of the pile foundation and a jacking member connected to the bridge pier through the reaction member, so that the one-time pouring construction of the cap can be achieved while meeting the unloading of the original bridge pier and the counter-pressure of the newly added pile foundation, and the construction efficiency is high, the construction period is short, the project cost is low, the application is wide, and the safety is high.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge pier reinforcement, and in particular to a cap system with a counter-pressure structure and a construction method thereof. Background Art

[0002] With the development of traffic load, the actual operating load of bridges is increasing. In addition, the piers in the water are eroded and collided, which seriously weakens the bearing capacity of the piers. In order to ensure the safety of the bridge structure, the piers need to be reinforced to improve the bearing capacity. The most effective way is to add pile foundations around the original piers, and then connect the pile foundations and piers into a whole through the addition of a cap to improve the bearing capacity of the piers. However, the reinforcement of piers now needs to be carried out in stages, which has problems such as low construction efficiency, long construction period, high construction difficulty, and high project cost.

[0003] In view of this, it is particularly important to design a cap system with a counter-pressure structure and a construction method with high construction efficiency, especially in bridge pier reinforcement projects. Summary of the invention

[0004] The purpose of the present invention is to provide a cap system with a back pressure structure, which can realize one-time pouring construction of the cap while meeting the unloading of the original pier and the back pressure of the newly added pile foundation, with high construction efficiency, short construction period, low project cost, wide application and high safety.

[0005] Another object of the present invention is to provide a construction method for a pedestal system with a back-pressure structure, which can realize a one-time pouring construction of the pedestal while satisfying the unloading of the original piers and the back-pressure of the newly added pile foundation, with high construction efficiency, short construction period, low project cost, wide application, high safety and good economic benefits.

[0006] The present invention is achieved by adopting the following technical solutions.

[0007] A cap system with a counter-pressure structure includes a bridge pier, a pile foundation, a distribution piece, a jacking piece and a reaction piece. The pile foundation and the bridge pier are both extended in the vertical direction. The distribution piece is fixedly installed on the top of the pile foundation. The reaction piece is arranged above the distribution piece and fixedly installed on the side of the bridge pier. The reaction piece is connected to the distribution piece through the jacking piece. The jacking piece can lift the bridge pier upward through the reaction piece to transfer part of the load of the bridge pier to the pile foundation through the distribution piece.

[0008] Furthermore, the distribution member includes a first lifting base plate, two distribution diagonal braces and two first distribution base plates. The number of pile foundations is two. The two distribution diagonal braces are fixedly connected and set at a first preset angle. Each distribution diagonal brace is fixedly connected to the top of a pile foundation through a first distribution base plate. The first lifting base plate is fixedly connected to the tops of the two distribution diagonal braces. The first lifting base plate is used to support the lifting member.

[0009] Furthermore, the distribution component also includes a distribution triangular support and a horizontal pull rod. The two distribution diagonal supports are combined to form a triangular cavity. The distribution triangular support is arranged at the top of the triangular cavity and is fixedly connected to the two distribution diagonal supports respectively. The horizontal pull rod is arranged at the bottom of the triangular cavity and is fixedly connected to the two distribution diagonal supports respectively.

[0010] Furthermore, the distribution member also includes two first reinforcing rib plates, which are arranged in a triangular shape, and each first reinforcing rib plate is fixedly connected between the first lifting bottom plate and a distribution diagonal brace.

[0011] Furthermore, the distribution member includes a second lifting base plate, a second distribution base plate, a plurality of distribution lattice columns and a plurality of distribution ribs, the plurality of distribution lattice columns are all extended in the vertical direction, each distribution rib is fixedly connected between two adjacent distribution lattice columns, the plurality of distribution lattice columns are fixedly connected to the top of the pile foundation through the second distribution base plate, the second lifting base plate is fixedly connected to the top of the plurality of distribution lattice columns, and the second lifting base plate is used to support the lifting member.

[0012] Furthermore, the reaction member includes a first lifting top plate, two first reaction diagonal braces, two adjustable reaction diagonal braces and two adjustable pads. The number of pile foundations is two. The two first reaction diagonal braces are fixedly connected and set at a second preset angle. Each first reaction diagonal brace is fixedly connected to an adjustable reaction diagonal brace through an adjustable pad. The adjustable reaction diagonal brace is fixedly connected to the side of the pier. The first lifting top plate is fixedly connected to the bottom of the two first reaction diagonal braces. The first lifting top plate is used to press the lifting member.

[0013] Furthermore, the reaction member also includes a reaction triangle support, and the reaction triangle support is fixedly connected between the two first reaction diagonal supports.

[0014] Furthermore, the reaction member also includes two second reinforcing rib plates, which are arranged in a triangular shape, and each second reinforcing rib plate is fixedly connected between the first lifting top plate and a first reaction force diagonal brace.

[0015] Furthermore, the adjustable reaction force brace includes a brace body, a first connecting plate and a first flange, one end of the brace body is fixedly connected to the first connecting plate, and the other end is fixedly connected to the first flange, a second flange is provided at one end of the first reaction force brace away from the first lifting top plate, the first flange is fixedly connected to the second flange through an adjusting pad, and the first connecting plate is fixedly connected to the side of the pier.

[0016] Furthermore, the adjusting reaction force brace also includes a fixing rod, one end of which is fixedly connected to the brace body, and the other end of which is fixedly connected to the fixing rod of another adjusting reaction force brace.

[0017] Furthermore, the reaction member includes a second reaction brace, a horizontal pressure rod, a second lifting top plate and two second connecting plates. The second reaction brace is fixedly connected to the horizontal pressure rod and is set at a third preset angle. The second reaction brace is fixedly connected to the side of the pier through a second connecting plate. The horizontal pressure rod is fixedly connected to the side of the pier through another second connecting plate. The second lifting top plate is fixedly connected to the bottom of the second reaction brace. The second lifting top plate is used to press the lifting member.

[0018] Furthermore, the reaction member also includes a third reinforcing rib plate, which is arranged in a triangular shape and is fixedly connected between the second reaction brace and the horizontal pressure rod.

[0019] Furthermore, the foundation system with a counter-pressure structure also includes an anchor, which includes a pile top embedded plate, a pile top embedded screw, a pile top adjusting nut and a pile top fixing nut. The pile top embedded screw extends into the top of the pile foundation and is fixedly connected to the pile foundation. The pile top embedded screw passes through the pile top adjusting nut, the pile top embedded plate, the distribution piece and the pile top fixing nut in sequence. The pile top adjusting nut is used to adjust the horizontality of the pile top embedded plate, and the pile top fixing nut is used to fix the relative position of the distribution piece and the pile top embedded plate.

[0020] Furthermore, the pedestal system with a counter-pressure structure also includes a corbel piece, which includes a corbel support plate, a corbel embedded screw, a corbel adjusting nut and a corbel fixing nut. The corbel embedded screw extends into the side of the pier and is fixedly connected to the pier. The corbel embedded screw passes through the corbel adjusting nut, the corbel support plate, the reaction piece and the corbel fixing nut in sequence. The corbel adjusting nut is used to adjust the verticality of the corbel support plate, and the corbel fixing nut is used to fix the relative position of the reaction piece and the corbel support plate.

[0021] Furthermore, the corbel support plate includes a fitting portion, a fixing portion and a reinforcement portion. The fitting portion is fixedly connected to the fixing portion and is arranged in an L shape. The reinforcement portion is fixedly connected to a side of the fixing portion away from the fitting portion. The fitting portion is arranged to fit the side of the pier.

[0022] Furthermore, the bridge pier is cylindrical, the fitting portion is in an arc-shaped plate shape, and the fixing portion is in a fan-shaped plate shape.

[0023] Furthermore, the cap system with a counter-pressure structure also includes a cap, which is wrapped around the distribution piece and the pier and is fixedly connected to the distribution piece and the pier respectively. The cap is arranged on the top of the pile foundation, and the pile foundation can bear part of the load of the pier through the cap.

[0024] A construction method for a cap system with a counter-pressure structure comprises: performing pile foundation construction; fixing a distribution member on the top of the pile foundation; installing a jacking member on the top of the distribution member; hoisting a reaction member to the top of the jacking member and fixing the reaction member to the side of a pier; and controlling the jacking member to lift the pier upwards.

[0025] Furthermore, after the step of controlling the lifting member to lift the bridge pier upward, the construction method of the cap system with a counter-pressure structure also includes: casting the cap on the top of the pile foundation so that the cap is wrapped around the distribution member and the bridge pier; and removing the lifting member and the reaction member.

[0026] The platform system with a back pressure structure and the construction method thereof provided by the present invention have the following beneficial effects:

[0027] The cap system with a counter-pressure structure provided by the present invention has a pile foundation and a bridge pier extending in a vertical direction, a distribution member fixedly installed on the top of the pile foundation, a reaction member arranged above the distribution member and fixedly installed on the side of the bridge pier, and the reaction member is connected to the distribution member through a jacking member, and the jacking member can lift the bridge pier upward through the reaction member to transfer part of the load of the bridge pier to the pile foundation through the distribution member. Compared with the prior art, the cap system with a counter-pressure structure provided by the present invention adopts a distribution member installed on the top of the pile foundation and a jacking member connected to the bridge pier through the reaction member, so that the one-time pouring construction of the cap can be achieved while satisfying the unloading of the original bridge pier and the counter-pressure of the newly added pile foundation, and has high construction efficiency, short construction period, low engineering cost, wide application and high safety.

[0028] The construction method of the cap system with a back-pressure structure provided by the present invention is applied to the cap system with a back-pressure structure. It can realize the one-time pouring construction of the cap while meeting the unloading of the original pier and the back pressure of the newly added pile foundation. It has high construction efficiency, short construction period, low project cost, wide application, high safety and good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A structural schematic diagram of a first viewing angle of a platform system with a back pressure structure provided by a first embodiment of the present invention;

[0031] Figure 2 A structural schematic diagram of a second viewing angle of a platform system with a back pressure structure provided by the first embodiment of the present invention;

[0032] Figure 3 A schematic structural diagram of a platform system with a back pressure structure provided by the first embodiment of the present invention from a third viewing angle;

[0033] Figure 4A schematic structural diagram of a distribution component in a platform system with a back pressure structure provided by the first embodiment of the present invention;

[0034] Figure 5 A schematic structural diagram of an anchor member in a cap system with a counter-pressure structure provided in a first embodiment of the present invention;

[0035] Figure 6 A schematic structural diagram of a reaction force member in a cap system with a counter-pressure structure provided in a first embodiment of the present invention;

[0036] Figure 7 for Figure 6 An exploded view of the middle adjustment reaction force brace connected to the first reaction force brace via an adjustment pad;

[0037] Figure 8 A schematic structural diagram of a corbel member in a cap system with a back pressure structure provided in the first embodiment of the present invention;

[0038] Fig. 9 A flowchart of the construction method of a cap system with a back pressure structure provided by the first embodiment of the present invention;

[0039] Fig.10 A structural schematic diagram of a support system with a back pressure structure provided by a second embodiment of the present invention from one perspective;

[0040] Fig.11 A structural schematic diagram of a support system with a back pressure structure provided by the second embodiment of the present invention from another perspective;

[0041] Fig.12 A schematic structural diagram of a distribution component in a platform system with a back pressure structure provided in a second embodiment of the present invention;

[0042] Fig.13 A schematic structural diagram of a reaction force member in a platform system with a back-pressure structure provided in the second embodiment of the present invention.

[0043] Icons: 10-capping system with counter-pressure structure; 100-bridge pier; 200-pile foundation; 300-distribution piece; 310-first lifting bottom plate; 320-distribution triangle support; 330-horizontal tie rod; 340-distribution diagonal support; 350-first distribution bottom plate; 360-first reinforcing rib plate; 370-triangular cavity; 381-second lifting bottom plate; 382-second distribution bottom plate; 383-distribution lattice column; 384-distribution rib plate; 400-lifting piece; 410-jack; 500-reaction piece; 510-first lifting top plate; 520-reaction triangle support; 530-second reinforcing rib plate; 540-first reaction diagonal support; 541-second flange; 550-adjustment Reaction brace; 551-brace body; 552-first connecting plate; 553-first flange; 554-fixing rod; 560-adjusting pad; 571-second reaction brace; 572-horizontal pressure rod; 573-second lifting top plate; 574-third reinforcing rib plate; 575-second connecting plate; 600-anchor; 610-pile top embedded plate; 620-pile top embedded screw; 630-pile top adjusting nut; 640-pile top fixing nut; 700-corbel; 710-corbel support plate; 711-fitting part; 712-fixing part; 713-reinforcement part; 720-corbel embedded screw; 730-corbel adjusting nut; 740-corbel fixing nut; 800-capping platform. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0050] First embodiment

[0051] Please refer to Figure 1 , Figure 2 and Figure 3 The embodiment of the present invention provides a cap system 10 with a back pressure structure, which is used to reinforce a bridge pier 100. It can realize the one-time pouring construction of the cap 800 while meeting the unloading of the original bridge pier 100 and the back pressure of the newly added pile foundation 200, with high construction efficiency, short construction period, low engineering cost, wide application and high safety.

[0052] The cap system 10 with a counter-pressure structure includes a pier 100, a pile foundation 200, a distribution component 300, a jacking component 400, a reaction component 500, an anchor component 600, a corbel component 700 and a cap 800. The pier 100 is a bridge pier that needs to be reinforced. All components except the pier 100 in the cap system 10 with a counter-pressure structure are used to reinforce the pier 100. The pile foundation 200 and the pier 100 are both extended in the vertical direction. The pile foundation 200 is arranged around the pier 100 in parallel and at intervals. The distance between the pile foundation 200 and the pier 100 needs to be determined according to actual conditions. The distribution component 300 is fixedly installed on the top of the pile foundation 200, and the pile foundation 200 can support the distribution component 300. The reaction component 500 is arranged above the distribution component 300 and fixedly installed on the side of the pier 100, and the reaction component 500 can support the pier 100. The reaction piece 500 is connected to the distribution piece 300 through the jacking piece 400. The jacking piece 400 is placed on the top of the distribution piece 300 and is arranged below the reaction piece 500. The jacking piece 400 is used to unload the pier 100 through the reaction piece 500, and transfer the unloaded load to the pile foundation 200 through the distribution piece 300. Specifically, when the jacking piece 400 rises upward, the jacking piece 400 lifts the pier 100 upward through the reaction piece 500 to transfer part of the load of the pier 100 to the pile foundation 200 through the distribution piece 300, thereby realizing the pile foundation 200 counterpressure and the pier 100 unloading operation at the same time, and the construction efficiency is high.

[0053] It is worth noting that the anchor 600 is fixedly installed on the top of the pile foundation 200 and is fixedly connected to the distribution member 300, that is, the distribution member 300 is fixedly connected to the pile foundation 200 through the anchor 600, and the anchor 600 can improve the connection strength between the distribution member 300 and the pile foundation 200 to fix the relative position of the distribution member 300 and the pile foundation 200. The bracket 700 is fixedly installed on the side of the pier 100 and is fixedly connected to the reaction member 500, that is, the reaction member 500 is fixedly connected to the pier 100 through the bracket 700, and the bracket 700 can improve the connection strength between the reaction member 500 and the pier 100 to fix the relative position of the reaction member 500 and the pier 100.

[0054] In this embodiment, the cap 800 is wrapped around the distribution member 300 and the pier 100, and is fixedly connected to the distribution member 300 and the pier 100 respectively. The cap 800 is arranged on the top of the pile foundation 200, and the pile foundation 200 can bear part of the load of the pier 100 through the cap 800. Specifically, the cap 800 is cast on the top of the pile foundation 200, and the pile foundation 200 can support the cap 800. The distribution member 300 is arranged in the cap 800, and the distribution member 300 serves as the skeleton of the cap 800. The pier 100 passes through the cap 800, and the cap 800 can transfer part of the load of the pier 100 to the pile foundation 200, so as to realize the auxiliary load-bearing function of the pile foundation 200.

[0055] In this embodiment, there are two bridge piers 100, which are arranged in parallel and spaced apart. There are two pile foundations 200, which are arranged in parallel and spaced apart. Both pile foundations 200 are arranged on the perpendicular midlines of the two bridge piers 100, that is, the connecting line of the two bridge piers 100 and the connecting line of the two pile foundations 200 are arranged in a cross shape. In this case, the two pile foundations 200 can simultaneously assist the bearing of the two bridge piers 100, so as to improve the construction efficiency, shorten the construction period, and reduce the construction cost.

[0056] Please refer to Figure 4 The distribution member 300 includes a first lifting base plate 310, a distribution triangle support 320, a horizontal pull rod 330, two distribution diagonal supports 340, two first distribution base plates 350 and two first reinforcing rib plates 360. The two distribution diagonal supports 340 are fixedly connected and arranged at a first preset angle. The two distribution diagonal supports 340 are arranged in an eight-shaped shape. The first preset angle needs to be determined according to actual conditions. Each distribution diagonal support 340 is fixedly connected to the top of a pile foundation 200 through a first distribution base plate 350, and the first distribution base plate 350 is fixedly connected to the pile foundation 200 through an anchor 600. The first lifting base plate 310 is fixedly connected to the top of the two distribution braces 340. The first lifting base plate 310 is used to support the lifting member 400. The lifting member 400 is placed on the first lifting base plate 310. The lifting member 400 can transfer pressure to the pile foundation 200 through the first lifting base plate 310, the distribution braces 340 and the first distribution base plate 350 in sequence.

[0057] It should be noted that the two distribution diagonal braces 340 are combined to form a triangular cavity 370, the distribution triangular brace 320 is arranged at the top of the triangular cavity 370, and is fixedly connected to the two distribution diagonal braces 340 respectively, and the horizontal pull rod 330 is arranged at the bottom of the triangular cavity 370, and is fixedly connected to the two distribution diagonal braces 340 respectively. The distribution triangular brace 320 and the horizontal pull rod 330 are both used to improve the connection strength of the two distribution diagonal braces 340 to fix the relative positions of the two distribution diagonal braces 340. Further, the first reinforcing rib plate 360 ​​is arranged in a triangular shape, and each first reinforcing rib plate 360 ​​is fixedly connected between the first lifting bottom plate 310 and a distribution diagonal brace 340. The first reinforcing rib plate 360 ​​is used to improve the connection strength between the first lifting bottom plate 310 and the distribution diagonal brace 340 to fix the relative positions of the first lifting bottom plate 310 and the distribution diagonal brace 340.

[0058] In this embodiment, the distribution triangle support 320, the horizontal tie rod 330 and the two distribution diagonal supports 340 are all made of double-pieced I-beams, and the first reinforcing rib plate 360 ​​is made of a triangular rib plate. The first lifting bottom plate 310, the distribution triangle support 320, the horizontal tie rod 330, the two distribution diagonal supports 340, the two first distribution bottom plates 350 and the two first reinforcing rib plates 360 are all fixedly connected by welding to improve the strength of the entire distribution member 300.

[0059] Please refer to Figure 5 The anchor 600 includes a pile top embedded plate 610, a pile top embedded screw 620, a pile top adjusting nut 630 and a pile top fixing nut 640. The pile top embedded screw 620 extends into the top of the pile foundation 200 and is fixedly connected to the pile foundation 200. The pile top embedded screw 620 passes through the pile top adjusting nut 630, the pile top embedded plate 610, the distribution member 300 and the pile top fixing nut 640 in sequence to fix the relative position of the distribution member 300 and the pile foundation 200. The pile top adjusting nut 630 is used to adjust the horizontality of the pile top embedded plate 610, thereby adjusting the horizontality of the first distribution bottom plate 350 of the distribution member 300. The pile top fixing nut 640 is used to fix the relative position of the distribution member 300 and the pile top embedded plate 610 to prevent the distribution member 300 from being displaced relative to the pile foundation 200.

[0060] Specifically, the pile top embedded screw 620 passes through the pile top adjusting nut 630, the pile top embedded plate 610 and the first distribution bottom plate 350 in sequence, and is threadedly matched with the pile top fixing nut 640. The pile top fixing nut 640 can be tightened relative to the pile top embedded screw 620 to fit and fix the pile top embedded plate 610 and the first distribution bottom plate 350 together, thereby fixing the relative position of the distribution component 300 and the anchor 600, and further fixing the relative position of the distribution component 300 and the pile foundation 200.

[0061] Please refer to Figure 6 and Figure 7The reaction member 500 includes a first lifting top plate 510, a reaction triangular support 520, two second reinforcing rib plates 530, two first reaction diagonal supports 540, two adjustment reaction diagonal supports 550 and two adjustment pads 560. The two first reaction diagonal supports 540 are fixedly connected and arranged at a second preset angle, and the two distribution diagonal supports 340 are arranged in an inverted figure eight shape, and the second preset angle needs to be determined according to actual conditions. Each first reaction diagonal support 540 is fixedly connected to an adjustment reaction diagonal support 550 through an adjustment pad 560, and the adjustment reaction diagonal support 550 is fixedly connected to the side of the pier 100 through a corbel 700. Specifically, the thickness of the adjustment pad 560 needs to be determined according to actual conditions. The first lifting top plate 510 is fixedly connected to the bottom of the two first reaction force braces 540. The first lifting top plate 510 is used to press the lifting member 400. The lifting member 400 can lift the first lifting top plate 510 upward to transfer the supporting force to the pier 100 through the first reaction force brace 540, the adjustment pad 560 and the adjustment reaction force brace 550 in sequence.

[0062] It should be noted that the reaction triangular brace 520 is fixedly connected between the two first reaction diagonal braces 540, and the reaction triangular brace 520 is used to improve the connection strength of the two first reaction diagonal braces 540 to fix the relative positions of the two first reaction diagonal braces 540. Further, the second reinforcing rib plates 530 are arranged in a triangular shape, and each second reinforcing rib plate 530 is fixedly connected between the first jacking top plate 510 and a first reaction diagonal brace 540, and the second reinforcing rib plates 530 are used to improve the connection strength between the first jacking top plate 510 and the first reaction diagonal brace 540 to fix the relative positions of the first jacking top plate 510 and the first reaction diagonal brace 540.

[0063] The adjusting reaction force brace 550 includes a brace body 551, a first connecting plate 552, a first flange 553 and a fixing rod 554. One end of the brace body 551 is fixedly connected to the first connecting plate 552, and the other end is fixedly connected to the first flange 553. Specifically, the first connecting plate 552 is welded to the first flange 553 through the brace body 551 to improve the connection strength of the adjusting reaction force brace 550. A second flange 541 is provided at one end of the first reaction force brace 540 away from the first lifting top plate 510, and the first flange 553 is fixedly connected to the second flange 541 through an adjusting pad 560, and bolts pass through the first flange 553, the adjusting pad 560 and the second flange 541 to fix the relative positions of the first reaction force brace 540 and the adjusting reaction force brace 550. The first connecting plate 552 is fixedly connected to the side of the pier 100 . The first connecting plate 552 is fixedly connected to the pier 100 through the corbel 700 to fix and adjust the relative position of the reaction force brace 550 and the pier 100 .

[0064] It should be noted that one end of the fixing rod 554 is welded or fixedly connected to the middle of the diagonal brace body 551 by bolts, and the other end of the fixing rod 554 is fixedly connected to the fixing rod 554 of another adjusting reaction force diagonal brace 550 by bolts. The two fixing rods 554 are arranged in a colinear manner and both extend in the horizontal direction. The two fixing rods 554 are arranged between the two diagonal brace bodies 551 to apply a horizontal inward pulling force to the two diagonal brace bodies 551. The pulling force can balance the horizontal outward thrust applied by the adjusting reaction force diagonal brace 550 to the bridge pier 100 through the corbel 700, so as to prevent the bridge pier 100 from being deformed or displaced in the horizontal direction during the upward lifting process.

[0065] In this embodiment, the reaction triangular brace 520, the diagonal brace body 551, the fixing rod 554 and the first reaction diagonal brace 540 are all made of double-jointed I-beams, and the second reinforcing rib plate 530 is made of a triangular rib plate. The first jacking top plate 510, the reaction triangular brace 520, the two first reaction diagonal braces 540 and the two second reinforcing rib plates 530 are all fixedly connected by welding to improve the strength of the entire reaction member 500.

[0066] Please refer to Figure 8 The corbel member 700 includes a corbel support plate 710, a corbel embedded screw 720, a corbel adjustment nut 730 and a corbel fixing nut 740. The corbel embedded screw 720 extends into the side of the pier 100 and is fixedly connected to the pier 100. The corbel embedded screw 720 passes through the corbel adjustment nut 730, the corbel support plate 710, the reaction piece 500 and the corbel fixing nut 740 in sequence to fix the relative position of the reaction piece 500 and the pier 100. The corbel adjustment nut 730 is used to adjust the verticality of the corbel support plate 710, thereby adjusting the verticality of the first connecting plate 552 of the reaction piece 500. The corbel fixing nut 740 is used to fix the relative position of the reaction piece 500 and the corbel support plate 710 to prevent the reaction piece 500 from being displaced relative to the pier 100.

[0067] The corbel support plate 710 includes a fitting portion 711, a fixing portion 712, and a reinforcing portion 713. The fitting portion 711 is fixedly connected to the fixing portion 712 and is arranged in an L shape, and the reinforcing portion 713 is fixedly connected to a side of the fixing portion 712 away from the fitting portion 711, and the fitting portion 711 is arranged to fit the side of the bridge pier 100. Specifically, the reinforcing portion 713 is welded to the fitting portion 711 through the fixing portion 712 to improve the strength of the corbel support plate 710.

[0068] In this embodiment, the bridge pier 100 is cylindrical, the fitting portion 711 is in an arc-shaped plate shape, the fixing portion 712 is in a fan-shaped plate shape, the first connecting plate 552 is in an arc-shaped plate shape, the fitting portion 711 is fitted on the side of the bridge pier 100, and the first connecting plate 552 is fitted on the side of the fitting portion 711 away from the bridge pier 100. The corbel pre-embedded screw 720 passes through the corbel adjustment nut 730, the fitting portion 711 and the first connecting plate 552 in sequence, and is threadedly matched with the corbel fixing nut 740. The corbel fixing nut 740 can be tightened relative to the corbel pre-embedded screw 720 to fit and fix the fitting portion 711 and the first connecting plate 552 together, thereby fixing the relative position of the reaction member 500 and the corbel member 700, and further fixing the relative position of the reaction member 500 and the bridge pier 100.

[0069] Please continue to refer to Figure 3 It should be noted that the jacking member 400 includes a jack 410 and a steel support (not shown). The jack 410 is used to lift the first jacking top plate 510 upwards, and the steel support is used to be clamped between the first jacking top plate 510 and the first jacking bottom plate 310 after the jack 410 lifts the first jacking top plate 510. The steel support serves as a temporary support member and has a self-discharging function for easy disassembly. Specifically, there are multiple jacking members 400, and multiple jacking members 400 are all arranged between the first jacking bottom plate 310 and the first jacking top plate 510 to simultaneously lift the first jacking top plate 510 upwards, thereby supporting the bridge pier 100, so that part of the load of the bridge pier 100 is transferred to the pile foundation 200, thereby realizing the auxiliary bearing function of the pile foundation 200.

[0070] Please refer to Fig. 9 The embodiment of the present invention also provides a construction method of a cap system 10 with a back pressure structure, which is applied to the above-mentioned cap system 10 with a back pressure structure. The construction method of the cap system 10 with a back pressure structure includes the following steps:

[0071] Step S100: constructing the pile foundation 200.

[0072] It should be noted that in step S100, the pile foundation 200 is arranged near the pier 100 so that the height of the pile foundation 200 is lower than that of the pier 100. Specifically, there are two pile foundations 200, and both pile foundations 200 are arranged on the mid-perpendicular lines of the two piers 100.

[0073] Step S200 : fixing the distribution member 300 on the top of the pile foundation 200 .

[0074] It is worth noting that in step S200, the pile head of the pile foundation 200 is firstly broken, a hole is drilled at the top of the pile foundation 200, and the pile top embedded screw 620 is fixedly installed, and then the pile top leveling nut is screwed to a specified height relative to the pile top embedded screw 620 according to the design elevation of the cap 800, and then the pile top embedded plate 610 is passed through the pile top embedded screw 620, and then the pile top fixing nut 640 is tightened to fix the position of the pile top embedded plate 610, and then the pile top embedded plate 610 is fixed at the top of the pile foundation 200 and the pile top embedded plate 610. The gap between 610 is filled with epoxy mortar. When the epoxy mortar reaches the designed strength, unscrew the pile top fixing nut 640, pass the first distribution base plate 350 through the pile top embedded screw 620, and fit tightly with the pile top embedded plate 610, and finally tighten the pile top fixing nut 640 again to fix the relative position of the pile top embedded plate 610 and the first distribution base plate 350, thereby fixing the relative position of the distribution component 300 and the pile foundation 200, and realizing the fixed installation operation of the distribution component 300 and the pile foundation 200.

[0075] Furthermore, after the distribution member 300 is fixedly installed, wooden planks are installed around the first lifting base plate 310, the top surface elevation of the wooden planks is consistent with the top surface elevation of the pedestal 800, and the formwork and steel bars of the pedestal 800 are installed on the pile foundation 200 to facilitate the later casting of the pedestal 800.

[0076] Step S300 : installing the lifting member 400 on the top of the distribution member 300 .

[0077] In this embodiment, a plurality of lifting members 400 are directly placed on the top of the distribution member 300 , and there is no need to fix the lifting members 400 to the distribution member 300 . The first lifting bottom plate 310 of the distribution member 300 can support the lifting members 400 .

[0078] Step S400 : hoisting the reaction member 500 to the top of the jacking member 400 , and fixing the reaction member 500 to the side of the pier 100 .

[0079] It is worth noting that before step S400, the corbel 700 needs to be fixedly installed on the side of the pier 100. Specifically, firstly, a hole is drilled on the side of the pier 100, and the corbel pre-embedded screw 720 is fixedly installed, and then the corbel adjustment nut 730 is screwed into the corbel pre-embedded screw 720, and then the corbel support plate 710 is passed through the corbel pre-embedded screw 720, and the verticality of the corbel support plate 710 is adjusted by the corbel adjustment nut 730 to meet the requirements, and then the corbel fixing nut 740 is tightened to fix the position of the corbel support plate 710, and then the corbel support plate 710 is fixedly installed on the corbel support plate 710. The gap between the plate 710 and the side of the pier 100 is filled with epoxy mortar. When the epoxy mortar reaches the designed strength, the corbel fixing nut 740 is unscrewed, and the first connecting plate 552 is passed through the corbel embedded screw 720 and fits tightly with the corbel support plate 710. Finally, the corbel fixing nut 740 is tightened again to fix the relative position of the corbel support plate 710 and the first connecting plate 552, thereby fixing the relative position of the reaction force brace 550 and the pier 100.

[0080] It should be noted that in step S400, the reaction member 500 is first hoisted to the top of the jacking member 400 so that the first jacking top plate 510 of the reaction member 500 is pressed on the jacking member 400, and then a suitable adjustment pad 560 is selected according to the distance between the first flange 553 and the second flange 541, and the adjustment pad 560 is installed between the first flange 553 and the second flange 541 by bolts to fix the relative position of the first reaction force brace 540 and the adjustment reaction force brace 550, thereby fixing the relative position of the reaction member 500 and the pier 100.

[0081] In this embodiment, after step S400, the fixing rods 554 of the two adjusting reaction force braces 550 are fixed together by bolts to fix the horizontal relative positions of the two adjusting reaction force braces 550, thereby fixing the horizontal relative positions of the two bridge piers 100 and preventing the bridge piers 100 from being deformed or displaced in the horizontal direction in the subsequent jacking steps.

[0082] Step S500: Control the lifting member 400 to lift the bridge pier 100 upward.

[0083] Specifically, in step S500, the jack 410 is first started, and the lifting force is applied in stages to the design value to transfer part of the load of the pier 100 to the pile foundation 200. Then, a steel support is installed between the first lifting top plate 510 and the first lifting bottom plate 310. The jack 410 is then unloaded in stages and then removed. At this time, the pile foundation 200 assists in bearing the pier 100 through the steel support.

[0084] Step S600 : Casting the cap 800 on the top of the pile foundation 200 so that the cap 800 is wrapped around the distribution piece 300 and the pier 100 .

[0085] It is worth noting that in step S600, the cap 800 concrete is poured on the pile foundation 200 and maintained. The cap 800 concrete is wrapped around the distribution piece 300 and the bridge pier 100. The distribution piece 300 serves as the skeleton of the cap 800 concrete to fix the relative position of the distribution piece 300 and the bridge pier 100. When the cap 800 concrete reaches the design strength, the cap 800 is formed. At this time, part of the load of the bridge pier 100 is directly transferred to the pile foundation 200 through the cap 800, and the pile foundation 200 can assist the bridge pier 100 in bearing the load through the cap 800. In this case, the cap 800 only needs to be poured once to be formed, which improves the construction efficiency, shortens the construction period, reduces the project cost, and has good social and economic benefits.

[0086] Step S700: remove the lifting member 400 and the reaction member 500.

[0087] Specifically, in step S700, the steel support is first released and removed. At this time, the reaction piece 500 is separated from the distribution piece 300, and the reaction piece 500 no longer transfers the load. Subsequently, the reaction piece 500 and the corbel piece 700 are removed in turn to facilitate their reuse next time, saving costs and reducing the project cost. Finally, the wooden planks around the first lifting base plate 310 are removed, and shrinkage compensating concrete is poured on the top of the first lifting base plate 310 to the top surface elevation of the pedestal 800.

[0088] In the cap system 10 with a counter-pressure structure provided in an embodiment of the present invention, the pile foundation 200 and the pier 100 are both extended in the vertical direction, the distribution member 300 is fixedly installed on the top of the pile foundation 200, the reaction member 500 is arranged above the distribution member 300 and fixedly installed on the side of the pier 100, the reaction member 500 is connected to the distribution member 300 through the jacking member 400, and the jacking member 400 can lift the pier 100 upward through the reaction member 500 to transfer part of the load of the pier 100 to the pile foundation 200 through the distribution member 300. Compared with the prior art, the cap system 10 with a counter-pressure structure provided by the present invention adopts a distribution member 300 installed on the top of the pile foundation 200 and a lifting member 400 connected to the pier 100 through a reaction member 500. Therefore, it can realize a one-time casting construction of the cap 800 while satisfying the unloading of the original pier 100 and the counter-pressure of the newly added pile foundation 200. It has high construction efficiency, short construction period, low project cost, wide application, and high safety, so that the construction method of the cap system 10 with a counter-pressure structure is simple and convenient to construct.

[0089] Second embodiment

[0090] Please refer to Fig.10 , Fig.11 , Fig.12 and Fig.13The embodiment of the present invention provides a cap system 10 with a counter-pressure structure. Compared with the first embodiment, the difference of this embodiment is that the number of pile foundations 200 and piers 100 is one, and the structures of the distribution member 300 and the reaction member 500 are different.

[0091] The subassembly 300 includes a second lifting base plate 381, a second distribution base plate 382, ​​a plurality of distribution lattice columns 383 and a plurality of distribution ribs 384. The plurality of distribution lattice columns 383 are all extended in the vertical direction, each distribution rib 384 is fixedly connected between two adjacent distribution lattice columns 383, and the plurality of distribution ribs 384 are arranged outside the plurality of distribution lattice columns 383. The plurality of distribution lattice columns 383 are fixedly connected to the top of the pile foundation 200 through the second distribution base plate 382, ​​and the second distribution base plate 382 is fixedly connected to the pile foundation 200 through the anchor 600. The second jacking base plate 381 is fixedly connected to the top of multiple distribution lattice columns 383. The second jacking base plate 381 is used to support the jacking member 400. The jacking member 400 is placed on the second jacking base plate 381. The jacking member 400 can transfer pressure to the pile foundation 200 through the second jacking base plate 381, the distribution lattice columns 383 and the second distribution base plate 382 in sequence.

[0092] In this embodiment, the number of the distribution lattice columns 383 and the distribution rib plates 384 are both three, the three distribution lattice columns 383 are distributed in a triangular shape, and the three distribution rib plates 384 connect the three distribution lattice columns 383 into one. Specifically, the distribution lattice columns 383 are made of double-jointed I-beams, and the distribution lattice columns 383 and the distribution rib plates 384 are welded to improve the strength of the entire distribution member 300.

[0093] The reaction member 500 includes a second reaction brace 571, a horizontal pressure rod 572, a second lifting top plate 573, a third reinforcing rib plate 574 and two second connecting plates 575. The second reaction brace 571 is fixedly connected to the horizontal pressure rod 572 and is arranged at a third preset angle. The second reaction brace 571 is fixedly connected to the side of the pier 100 through a second connecting plate 575, and the horizontal pressure rod 572 is fixedly connected to the side of the pier 100 through another second connecting plate 575. The second lifting top plate 573 is fixedly connected to the bottom of the second reaction brace 571, and the second lifting top plate 573 is used to press the lifting member 400. The lifting member 400 can lift the second lifting top plate 573 upward, so as to transmit the supporting force to the pier 100 through the second reaction brace 571 and the second connecting plate 575 in sequence, or transmit the supporting force to the pier 100 through the horizontal pressure rod 572 and the second connecting plate 575 in sequence. The third reinforcing rib plate 574 is arranged in a triangular shape and is fixedly connected between the second reaction force diagonal brace 571 and the horizontal pressure rod 572 . The third reinforcing rib plate 574 is used to increase the connection strength between the second reaction force diagonal brace 571 and the horizontal pressure rod 572 so as to fix the relative position of the second reaction force diagonal brace 571 and the horizontal pressure rod 572 .

[0094] In this embodiment, the second reaction force brace 571 and the horizontal pressure rod 572 are both made of double-pieced I-beams, and the third reinforcing rib plate 574 is made of a triangular rib plate. The second connecting plate 575 is in an arc-shaped plate shape so as to fit closely with the corbel support plate 710. The second reaction force brace 571, the horizontal pressure rod 572, the second jacking top plate 573, the third reinforcing rib plate 574 and the two second connecting plates 575 are all fixedly connected by welding to improve the strength of the entire reaction member 500.

[0095] The embodiment of the present invention further provides a construction method of a cap system 10 with a back pressure structure. Compared with the first embodiment, the difference of this embodiment is that the construction method of step S400 is different.

[0096] In this embodiment, before step S400, the corbel 700 needs to be fixedly installed on the side of the pier 100. Specifically, firstly, a hole is drilled on the side of the pier 100, and the corbel pre-embedded screw 720 is fixedly installed, then the corbel adjustment nut 730 is screwed into the corbel pre-embedded screw 720, then the corbel support plate 710 is passed through the corbel pre-embedded screw 720, and the verticality of the corbel support plate 710 is adjusted by the corbel adjustment nut 730 to meet the requirements, and then the corbel fixing nut 740 is tightened to fix the position of the corbel support plate 710, and then the gap between the corbel support plate 710 and the side of the pier 100 is filled with epoxy mortar, and when the epoxy mortar reaches the design strength, the corbel fixing nut 740 is screwed off.

[0097] In step S400, the reaction piece 500 is first hoisted to the top of the jacking piece 400 so that the second jacking top plate 573 of the reaction piece 500 is pressed on the jacking piece 400, and then the second connecting plate 575 is passed through the corbel embedded screw 720 and fits tightly with the corbel support plate 710, and finally the corbel fixing nut 740 is tightened again to fix the relative position of the corbel support plate 710 and the second connecting plate 575, thereby fixing the relative position of the reaction piece 500 and the pier 100.

[0098] The beneficial effects of the platform system 10 with a back pressure structure and the construction method thereof provided in the embodiment of the present invention are the same as those of the first embodiment, and will not be repeated here.

[0099] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cap system with a back pressure structure, characterized in that: The invention comprises a pier, a pile foundation, a distribution member, a jacking member and a reaction member, wherein the pile foundation and the pier are both extended in the vertical direction, the distribution member is fixedly installed on the top of the pile foundation, the reaction member is arranged above the distribution member and fixedly installed on the side of the pier, the reaction member is connected to the distribution member through the jacking member, and the jacking member can lift the pier upward through the reaction member to transfer part of the load of the pier to the pile foundation through the distribution member; The distribution member includes a first lifting base plate, two distribution diagonal braces and two first distribution base plates. The number of the pile foundations is two. The two distribution diagonal braces are fixedly connected and set at a first preset angle. Each distribution diagonal brace is fixedly connected to the top of a pile foundation through a first distribution base plate. The first lifting base plate is fixedly connected to the tops of the two distribution diagonal braces. The first lifting base plate is used to support the lifting member.

2. The platform system with a back pressure structure according to claim 1, characterized in that: The distribution member also includes a distribution triangular support and a horizontal pull rod. The two distribution diagonal supports are combined to form a triangular cavity. The distribution triangular support is arranged at the top of the triangular cavity and is fixedly connected to the two distribution diagonal supports respectively. The horizontal pull rod is arranged at the bottom of the triangular cavity and is fixedly connected to the two distribution diagonal supports respectively.

3. The platform system with a back pressure structure according to claim 1, characterized in that: The distribution member further includes two first reinforcing rib plates, which are arranged in a triangular shape, and each of the first reinforcing rib plates is fixedly connected between the first lifting bottom plate and one of the distribution diagonal braces.

4. The platform system with a back pressure structure according to claim 1, characterized in that: The distribution member includes a second jacking base plate, a second distribution base plate, a plurality of distribution lattice columns and a plurality of distribution ribs. The plurality of distribution lattice columns are extended in the vertical direction. Each of the distribution ribs is fixedly connected between two adjacent distribution lattice columns. The plurality of distribution lattice columns are fixedly connected to the top of the pile foundation through the second distribution base plate. The second jacking base plate is fixedly connected to the top of the plurality of distribution lattice columns. The second jacking base plate is used to support the jacking member.

5. The platform system with a back pressure structure according to claim 1, characterized in that: The reaction force member includes a first lifting top plate, two first reaction force braces, two adjustable reaction force braces and two adjustable pads. The number of the pile foundations is two. The two first reaction force braces are fixedly connected and set at a second preset angle. Each of the first reaction force braces is fixedly connected to an adjustable reaction force brace through an adjustable pad. The adjustable reaction force brace is fixedly connected to the side of the pier. The first lifting top plate is fixedly connected to the bottom of the two first reaction force braces. The first lifting top plate is used to press the lifting member.

6. The platform system with a back pressure structure according to claim 5, characterized in that: The reaction member further comprises a reaction triangular support, and the reaction triangular support is fixedly connected between the two first reaction diagonal supports.

7. The platform system with a back pressure structure according to claim 5, characterized in that: The reaction member further includes two second reinforcing rib plates, which are arranged in a triangular shape, and each of the second reinforcing rib plates is fixedly connected between the first lifting top plate and one of the first reaction force diagonal braces.

8. The platform system with a back pressure structure according to claim 5, characterized in that: The adjustable reaction force brace includes a brace body, a first connecting plate and a first flange, one end of the brace body is fixedly connected to the first connecting plate, and the other end is fixedly connected to the first flange, a second flange is provided at one end of the first reaction force brace away from the first lifting top plate, the first flange is fixedly connected to the second flange through the adjusting pad, and the first connecting plate is fixedly connected to the side of the pier.

9. The platform system with a back pressure structure according to claim 8, characterized in that: The adjustable reaction force brace also includes a fixing rod, one end of which is fixedly connected to the brace body, and the other end of which is fixedly connected to the fixing rod of another adjustable reaction force brace.

10. The platform system with a back pressure structure according to claim 1, characterized in that: The reaction member includes a second reaction brace, a horizontal pressure rod, a second lifting top plate and two second connecting plates. The second reaction brace is fixedly connected to the horizontal pressure rod and is arranged at a third preset angle. The second reaction brace is fixedly connected to the side of the pier through one of the second connecting plates. The horizontal pressure rod is fixedly connected to the side of the pier through another of the second connecting plates. The second lifting top plate is fixedly connected to the bottom of the second reaction brace. The second lifting top plate is used to press the lifting member.

11. The platform system with a back pressure structure according to claim 10, characterized in that: The reaction member also includes a third reinforcing rib plate, which is arranged in a triangular shape and is fixedly connected between the second reaction brace and the horizontal pressure rod.

12. The platform system with a back pressure structure according to any one of claims 1 to 11, characterized in that: The cap system with the counter-pressure structure also includes an anchor, which includes a pile top embedded plate, a pile top embedded screw, a pile top adjusting nut and a pile top fixing nut. The pile top embedded screw extends into the top of the pile foundation and is fixedly connected to the pile foundation. The pile top embedded screw passes through the pile top adjusting nut, the pile top embedded plate, the distribution piece and the pile top fixing nut in sequence. The pile top adjusting nut is used to adjust the horizontality of the pile top embedded plate, and the pile top fixing nut is used to fix the relative position of the distribution piece and the pile top embedded plate.

13. The platform system with a back pressure structure according to any one of claims 1 to 11, characterized in that: The pedestal system with the counter-pressure structure also includes a corbel piece, which includes a corbel support plate, a corbel embedded screw, a corbel adjustment nut and a corbel fixing nut. The corbel embedded screw extends into the side of the pier and is fixedly connected to the pier. The corbel embedded screw sequentially passes through the corbel adjustment nut, the corbel support plate, the reaction piece and the corbel fixing nut. The corbel adjustment nut is used to adjust the verticality of the corbel support plate, and the corbel fixing nut is used to fix the relative position of the reaction piece and the corbel support plate.

14. The platform system with a back pressure structure according to claim 13, characterized in that: The corbel support plate includes a fitting portion, a fixing portion and a reinforcement portion. The fitting portion is fixedly connected to the fixing portion and is arranged in an L shape. The reinforcement portion is fixedly connected to a side of the fixing portion away from the fitting portion. The fitting portion is arranged to fit the side of the pier.

15. The platform system with a back pressure structure according to claim 14, characterized in that: The bridge pier is cylindrical, the fitting portion is in an arc-shaped plate shape, and the fixing portion is in a fan-shaped plate shape.

16. The platform system with a back pressure structure according to any one of claims 1 to 11, characterized in that: The cap system with a counter-pressure structure also includes a cap, which is wrapped around the distribution member and the pier and fixedly connected to the distribution member and the pier respectively. The cap is arranged on the top of the pile foundation, and the pile foundation can bear part of the load of the pier through the cap.

17. A construction method for a cap system with a back pressure structure, characterized in that: A cap system with a back pressure structure as claimed in any one of claims 1 to 16, comprising: Carry out pile foundation construction; The distribution piece is fixedly installed on the top of the pile foundation; Installing a lifting member on the top of the distribution member; Hoisting the reaction piece to the top of the jacking piece, and fixing the reaction piece to the side of the pier; The lifting member is controlled to lift the bridge pier upward.

18. The construction method of the platform system with a counter-pressure structure according to claim 17, characterized in that: After the step of controlling the lifting member to lift the bridge pier upward, the construction method of the cap system with a counter-pressure structure further includes: Casting a cap on the top of the pile foundation so that the cap is wrapped around the distribution member and the pier; The lifting member and the reaction member are removed.

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