High-level bridge large-span pile cap structure and construction method thereof

Abstract

The application discloses a high bridge large-span pile cap structure and a construction method thereof, a sleeve connector is arranged at intervals along a vertical direction, a pier fixing sleeve and a pile fixing sleeve are vertically extended to the inside of the pile cap respectively, and are connected with each other through the sleeve connector; the supporting mechanism comprises a receiving pipe network arranged on the upper layer of the pile cap and a supporting pipe network arranged on the lower layer of the pile cap, the receiving pipe network and the supporting pipe network are arranged at intervals, and are connected with the bottom of the sleeve connector respectively. Through the fixing mechanism, the rigid connection between the pier column and the pile foundation is formed, the vertical stress of the pier column is directly transmitted to the pile foundation, and the load burden of the pile cap is effectively reduced; through the supporting mechanism, after the stress of the supporting network is pressed downward, the stress of the unloading network is decomposed, part of the vertical stress is converted into horizontal stress, and the longitudinal load of the pier column is offset; under the sequential action of the multi-layer receiving pipe network, the vertical stress of the pier column is greatly weakened, and the bearing capacity and the deformation resistance of the pile cap are improved as a whole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge structure, and in particular to a large-span bearing platform structure of viaduct and a construction method thereof. BACKGROUND

[0002] As a bridge foundation structure, the bearing platform is connected with the pile foundation and the pier column respectively, and bears the load of the pier column and the load above the pier column, and plays an important role in the bridge structure. With the rapid development of domestic infrastructure, the bridge construction scene is also gradually widespread, especially under the expansion of urban road network construction, the viaduct becomes a key facility for urban reconstruction and road upgrading. In order to adapt to the environment of rivers, mountains and railways, large-span bearing platforms are often used.

[0003] During the use of the large-span bearing platform, the load of the pier column and the load above the pier column is often larger, and after acting on the surface of the bearing platform, a larger longitudinal load is formed, which generates a downward bending moment on the bearing platform. If only the steel reinforcement framework inside the bearing platform is used, the bearing capacity and deformation resistance of the bearing platform are limited, and it is difficult to resist the burden of the longitudinal load, resulting in compression deformation of the bearing platform. On the one hand, the structural stability of the viaduct cannot be ensured, and on the other hand, the soil structure below the bearing platform is easily damaged, which has a large safety hazard. SUMMARY

[0004] The present application aims to solve the problems in the prior art and provides a large-span bearing platform structure of viaduct and a construction method thereof.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A large-span bearing platform structure of viaduct, comprising a horizontally arranged bearing platform, pier columns symmetrically arranged on the left and right sides of the bearing platform, and pile foundations uniformly arranged below the bearing platform, the pier columns and the pile foundations are coaxially arranged, a fixing mechanism is arranged between the pier columns and the pile foundations, and a supporting mechanism is arranged inside the bearing platform, characterized in that:

[0007] The fixing mechanism comprises a pier fixing sleeve arranged inside the pier column, a pile fixing sleeve arranged inside the pile foundation, and a sleeve connector arranged inside the bearing platform, the sleeve connector is arranged in a vertical direction, the pier fixing sleeve and the pile fixing sleeve are vertically extended into the bearing platform, and are connected with each other through the sleeve connector;

[0008] The supporting mechanism comprises a receiving pipe network arranged on the upper layer of the bearing platform, and a supporting pipe network arranged on the lower layer of the bearing platform, the receiving pipe network and the supporting pipe network are arranged in a spaced manner, and are connected with the bottom of the sleeve connector respectively;

[0009] The receiving pipe network is in an upward convex structure, comprising an upper and lower supporting network part and an extending network part, and a force relieving network part is connected between the supporting network part and the extending network part, the supporting network part is horizontally arranged and corresponds to the internal position of the pier column, and the force relieving network part is arranged in an inclined manner and corresponds to the edge position of the pier column.

[0010] Preferably, the pier fixing sleeve set comprises a pier fixing sleeve ring and pier fixing vertical rods uniformly arranged around the pier fixing sleeve ring, the pier fixing vertical rods vertically extend from the top of the pier column to the bottom of the bearing platform and are fastened to the pier fixing sleeve ring; the pile fixing sleeve set comprises a pile fixing sleeve ring and pile fixing vertical rods uniformly arranged around the pile fixing sleeve ring, the pile fixing vertical rods vertically extend from the bottom of the pile foundation to the top of the bearing platform and are fastened to the pile fixing sleeve ring, and the pier fixing vertical rods and the pile fixing vertical rods are fixed by the sleeve connector.

[0011] Preferably, the sleeve connector comprises a sleeve inner ring and a sleeve outer ring arranged coaxially, the sleeve inner ring is embedded in the sleeve outer ring and is fixed by clamping; the sleeve inner ring is vertically aligned with the pile fixing sleeve ring and is inserted into the pile fixing vertical rods, and the sleeve outer ring is vertically aligned with the pier fixing sleeve ring and is inserted into the pier fixing vertical rods; longitudinal springs are respectively connected between adjacent sleeve inner rings and between adjacent sleeve outer rings, and the longitudinal springs are sleeved on the outer sides of the pile fixing vertical rods and the pier fixing vertical rods.

[0012] Preferably, the fixing mechanism further comprises a foundation fixing ring arranged at the bottom of the bearing platform, the foundation fixing ring is coaxially arranged with the pile fixing sleeve ring and is connected with a foundation inclined rod, the foundation inclined rod extends upwardly and obliquely from the foundation fixing ring, an inclined spring is sleeved on the outer side of the foundation inclined rod, and the two ends of the inclined spring abut against the foundation fixing ring and the pier fixing sleeve ring, respectively.

[0013] Preferably, the receiving pipe network and the supporting pipe network are each arranged in three layers, the three layers of the receiving pipe network are arranged from top to bottom, and the inclination angles of the three layers of the receiving pipe network gradually decrease, and the supporting pipe network is vertically aligned with the receiving pipe network.

[0014] Preferably, the receiving pipe network and the supporting pipe network each comprise a plurality of longitudinally and transversely intersecting receiving stress pipes and supporting stress pipes, the receiving stress pipes and the supporting stress pipes are hollow and have stress cables inserted therein, the stress cables extend out of the two ends of the receiving stress pipes and the supporting stress pipes and are connected with fastening assemblies.

[0015] Preferably, the fastening assembly comprises a limiting cable sleeve arranged at the end of the stress cable and a stop flange arranged at the end of the receiving stress pipe and the supporting stress pipe, and a transverse spring is connected between the limiting cable sleeve and the stop flange.

[0016] A construction method of a high bridge large-span bearing platform structure, characterized in that the method comprises the following steps:

[0017] Step 1: constructing a pile foundation

[0018] Drill pile hole under the ground, check the construction drawing, determine the position where the pier column needs to be set up, mark the pile hole corresponding to the vertical position, the marked pile hole as a reference hole, the pile fixing sleeve is buried in the reference hole, and the upper end of the pile fixing sleeve protrudes from the ground;The steel reinforcement cage is vertically placed in the pile hole, the steel reinforcement cage is connected with the pile fixing sleeve, the concrete is poured into the steel reinforcement cage, and the pile foundation is obtained after the concrete reaches the design strength;

[0019] Step 2, build the bearing platform:

[0020] The bearing platform steel reinforcement frame is built above the pile foundation, the support pipe network is laid at the lower layer position of the bearing platform steel reinforcement frame, the bearing pipe network is laid at the upper layer position of the bearing platform steel reinforcement frame, the support pipe network and the bearing pipe network are distributed at intervals, and the supporting net part is vertically aligned with the reference hole;According to the size of the pier column, draw the range on the ground, the supporting net part corresponds to the inside of the pier column, and the force relieving net part corresponds to the outer edge of the pier column;The prestress tension is applied to the support pipe network and the bearing pipe network;The pier fixing sleeve is vertically connected with the pile foundation sleeve, is fixed through the sleeve connector, the upper end of the pier fixing sleeve protrudes from the bearing platform steel reinforcement frame, and the sleeve connector is fixed above the support pipe network and the bearing pipe network;The concrete is poured into the bearing platform steel reinforcement frame, and the bearing platform is obtained after the concrete reaches the design strength;

[0021] Step 3, build the pier column:

[0022] The pier column steel reinforcement frame is built above the bearing platform, the pier column steel reinforcement frame is connected with the pier fixing sleeve, the concrete is poured into the pier column steel reinforcement frame, and the pier column is obtained after the concrete reaches the design strength.

[0023] The present application has the following beneficial effects:

[0024] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The structure diagram of the bearing platform is shown in the present application

[0026] Figure 2 Structure diagram of the fixing mechanism of the present application

[0027] Figure 3 Structure diagram of the fixing mechanism of the present application

[0028] Figure 4 Front view of the support mechanism of the present application

[0029] Figure 5 Side view of the support mechanism of the present application

[0030] Figure 6 Structure diagram of the receiving pipe network of the present application

[0031] Figure 7 Structure diagram of the support pipe network of the present application

[0032] Figure 8 Structure diagram of the supporting network part of the present application

[0033] Figure 9 Structure diagram of the fastening assembly of the present application

[0034] BRIEF DESCRIPTION OF DRAWINGS: bearing platform 1, pier column 2, pile foundation 3, receiving pipe network 4, support pipe network 5, supporting network part 6, extending network part 7, force relieving network part 8, pier fixing sleeve ring 9, pier fixing vertical rod 10, pile fixing sleeve ring 11, pile fixing vertical rod 12, inner sleeve ring 13, outer sleeve ring 14, foundation fixing ring 15, foundation inclined rod 16, receiving stress pipe 17, support stress pipe 18, stress cable 19, limiting cable sleeve 20, stop flange 21. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] With reference to Figures 1 to 9 , an embodiment provided by the present application includes:

[0037] The application discloses a high bridge large-span bearing platform 1 structure which comprises a horizontally arranged bearing platform 1, symmetrically arranged pier columns 2 on the left and right sides of the bearing platform 1 and pile foundations 3 arranged below the bearing platform 1, the pier columns 2 and the pile foundations 3 are coaxially arranged, a fixing mechanism is arranged between the pier columns 2 and the pile foundations 3, a supporting mechanism is arranged in the bearing platform 1, the fixing mechanism comprises a pier fixing sleeve arranged in the pier column 2, a pile fixing sleeve arranged in the pile foundation 3 and a sleeve connector arranged in the bearing platform 1, the sleeve connector is arranged in a vertical direction, the pier fixing sleeve and the pile fixing sleeve are vertically extended into the bearing platform 1 and are connected with each other through the sleeve connector, the supporting mechanism comprises a receiving pipe network 4 arranged on the upper layer of the bearing platform 1 and a supporting pipe network 5 arranged on the lower layer of the bearing platform 1, the receiving pipe network 4 and the supporting pipe network 5 are arranged in a spaced mode and are connected with the bottom of the sleeve connector, the receiving pipe network 4 is in an upward protruding structure and comprises an upper and lower arranged supporting network part 6 and an extending network part 7, a force relieving network part 8 is arranged between the supporting network part 6 and the extending network part 7, the supporting network part 6 is horizontally arranged and corresponds to the inner position of the pier column 2, the force relieving network part 8 is arranged in an inclined mode and corresponds to the outer edge position of the pier column 2.

[0038] The bearing platform 1 is horizontally arranged on the ground, the top of the bearing platform 1 is connected with the pier column 2 and the bottom of the bearing platform 1 is connected with the pile foundation 3, the number of the pier columns 2 is two and the pier columns 2 are arranged on the left and right sides of the bearing platform 1, the pier columns 2 and the pile foundations 3 are in a cylindrical structure and are vertically installed and coaxially arranged, the fixing mechanism is arranged between the pier columns 2 and the pile foundations 3 and rigidly connects the pier columns 2 and the pile foundations 3, the supporting mechanism is arranged in the bearing platform 1 and provides a consolidation effect for the supporting mechanism, the pier fixing sleeve is arranged in the pier column 2 and is coaxially aligned with the pier column 2, the pile fixing sleeve is arranged in the pile foundation 3 and is coaxially aligned with the pile foundation 3, the sleeve connector is arranged in the bearing platform 1 and is vertically aligned with the pier fixing sleeve and the pile fixing sleeve, the sleeve connectors are arranged in a spaced mode and are distributed in a vertical direction, the bottom of the pier fixing sleeve is downwardly extended into the bearing platform 1, the top of the pile fixing sleeve is upwardly extended into the bearing platform 1, the pier fixing sleeve and the pile fixing sleeve are nested with each other and are fixedly connected through the sleeve connector.

[0039] A plurality of receiving pipe networks 4 are located on the upper layer of the bearing platform 1, and are in an upward protruding structure, are arranged horizontally, and are distributed at intervals along the vertical direction. A plurality of supporting pipe networks 5 are located on the lower layer of the bearing platform 1, and are in a horizontal network structure, are arranged horizontally, and are distributed at intervals along the vertical direction. The receiving pipe network 4 includes longitudinally and transversely intersecting receiving stress pipes 17, the supporting pipe network 5 includes longitudinally and transversely intersecting supporting stress pipes 18, the receiving pipe network 4 is vertically aligned with the supporting pipe network 5, the receiving stress pipe 17 corresponds in position to the supporting stress pipe 18, and the longitudinal load acts vertically downward from the receiving pipe network 4 to the supporting pipe network 5. The kit connector located on the upper layer of the bearing platform 1 is connected with the receiving pipe network 4, the bottom of the kit connector horizontally abuts against the top of the receiving pipe network 4, the kit connector located on the lower layer of the bearing platform 1 is connected with the supporting pipe network 5, and the bottom of the kit connector horizontally abuts against the top of the supporting pipe network 5, so that the longitudinal load of each kit connector can directly act on the corresponding position of the receiving pipe network 4 and the supporting pipe network 5, and the stress transmission efficiency is improved.

[0040] The receiving pipe network 4 is in an upward protruding structure, the protruding structure corresponds in position to the pier column 2, and is pre-stretched and tensioned, so that the receiving pipe network 4 has a pre-stress for offsetting a certain longitudinal load. The receiving pipe network 4 includes a supporting network part 6, a force relieving network part 8 and an extending network part 7 from top to bottom, and the supporting network part 6 is connected with the extending network part 7 through the force relieving network part 8. The supporting network part 6 is arranged horizontally and corresponds in position to the inside of the pier column 2, and is used for bearing the vertical stress of the pier column 2. The force relieving network part 8 is arranged obliquely and corresponds in position to the outer edge of the pier column 2, decomposes the vertical stress through the oblique structure, converts a certain vertical stress into horizontal stress, and thus offsets part of the vertical stress of the pier column 2. The extending network part 7 is arranged horizontally, disperses the horizontal stress, and improves the overall stress balance.

[0041] The vertical connection of the pier fixing kit and the pile fixing kit is formed through the setting of the fixing mechanism, the rigid connection of the pier column 2 and the pile foundation 3 is formed, the vertical stress of the pier column 2 is directly transmitted to the pile foundation 3, the load burden of the bearing platform 1 is effectively reduced by using the good bearing capacity of the pile foundation 3, the kit connector is overlapped above each layer of the receiving pipe network 4 and the supporting pipe network 5, the transmission efficiency of the vertical stress is improved, and the resisting effect of the supporting mechanism is fully played. Through the setting of the supporting mechanism, when the vertical stress of the pier column 2 acts on the bearing platform 1, the receiving pipe network 4 is used for supporting, the supporting network part 6 is stressed and pressed downward after being stressed, the force relieving network part 8 decomposes the stress, converts part of the vertical stress into horizontal stress, and offsets the longitudinal load of the pier column 2; under the sequential action of the plurality of receiving pipe networks 4, the vertical stress of the pier column 2 is greatly weakened, the foundation is reinforced through the supporting pipe network 5, and the supporting pipe network 5 and the receiving pipe network 4 have longitudinal pre-stress through pre-stretching and tensioning, the bearing capacity and the anti-deformation capacity of the bearing platform 1 are improved as a whole, and the compression deformation of the bearing platform 1 is avoided.

[0042] In this embodiment, as preferred, the pier fixing assembly comprises a pier fixing ring 9 and pier fixing vertical rods 10 evenly arranged around the pier fixing ring 9, the pier fixing vertical rods 10 vertically extend from the top of the pier column 2 to the bottom of the pile cap 1 and are fixedly connected with the pier fixing ring 9; the pile fixing assembly comprises a pile fixing ring 11 and pile fixing vertical rods 12 evenly arranged around the pile fixing ring 11, the pile fixing vertical rods 12 vertically extend from the bottom of the pile foundation 3 to the top of the pile cap 1 and are fixedly connected with the pile fixing ring 11, and the pier fixing vertical rods 10 and the pile fixing vertical rods 12 are fixed by the assembly connector.

[0043] The pier fixing ring 9 is horizontally arranged and has a circular ring structure, and a plurality of through holes for inserting the pier fixing vertical rods 10 are arranged on the surface. The pier fixing vertical rods 10 are vertically arranged and evenly arranged around the pier fixing ring 9. The pier fixing vertical rods 10 vertically extend from the top of the pier column 2 to the bottom of the pile cap 1 and are fixedly connected with the pier fixing ring 9. The pile fixing ring 11 is horizontally arranged and has a circular ring structure, and a plurality of through holes for inserting the pile fixing vertical rods 12 are arranged on the surface. The pile fixing vertical rods 12 are vertically arranged and evenly arranged around the pile fixing ring 11. The pile fixing vertical rods 12 vertically extend from the bottom of the pile foundation 3 to the top of the pile cap 1 and are fixedly connected with the pile fixing ring 11. The pier fixing vertical rods 10 and the pile fixing vertical rods 12 inside the pile cap 1 are staggered and fixedly connected by the assembly connector, so that the pier fixing assembly and the pile fixing assembly form an integral structure, constituting a rigid connection between the pier column 2 and the pile foundation 3, and directly transmitting the vertical stress of the pier column 2 to the pile foundation 3.

[0044] In this embodiment, as preferred, the assembly connector comprises an assembly inner ring 13 and an assembly outer ring 14 coaxially arranged, the assembly inner ring 13 is embedded in the assembly outer ring 14 and is fixedly connected by clamping; the assembly inner ring 13 is vertically aligned with the pile fixing ring 11 and is inserted with the pile fixing vertical rods 12, the assembly outer ring 14 is vertically aligned with the pier fixing ring 9 and is inserted with the pier fixing vertical rods 10; longitudinal springs are respectively connected between adjacent assembly inner rings 13 and between adjacent assembly outer rings 14, and the longitudinal springs are sleeved outside the pile fixing vertical rods 12 and the pier fixing vertical rods 10.

[0045] The inner sleeve 13 and the outer sleeve 14 are annular structures, and a plurality of through holes are arranged on the surfaces of the inner sleeve 13 and the outer sleeve 14. The inner side of the outer sleeve 14 is provided with a stepped groove, the inner sleeve 13 is embedded in the inner sleeve 14, and is clamped in the stepped groove and fixed by welding. The inner sleeve 13 is vertically aligned with the pile sleeve 11, the pile rod 12 in the cap 1 is inserted into the through hole of the inner sleeve 13, the outer sleeve 14 is vertically aligned with the pier sleeve 9, and the pier rod 10 in the cap 1 is inserted into the through hole of the outer sleeve 14. A plurality of sleeve connectors are arranged at intervals in the vertical direction, and longitudinal springs are arranged between adjacent inner sleeves 13 and sleeved on the outer side of the pile rod 12, and longitudinal springs are arranged between adjacent outer sleeves 14 and sleeved on the outer side of the pier rod 10. Under the action of the sleeve connector, the pier sleeve and the pile sleeve form a whole structure, the longitudinal spring is located between the adjacent sleeve connectors, the fastening force can be increased, the structural deformation can be reduced, and the stability and load capacity of the cap 1 can be improved.

[0046] In the embodiment, as a preferred, the fixing mechanism further comprises a foundation fixing ring 15 arranged at the bottom of the cap 1, the foundation fixing ring 15 is coaxially arranged with the pile sleeve 11, and is connected with a foundation inclined rod 16, the foundation inclined rod 16 extends upwardly and obliquely from the foundation fixing ring 15, and an inclined spring is sleeved on the outer side of the foundation inclined rod 16, and the two ends of the inclined spring are respectively abutted with the foundation fixing ring 15 and the pier sleeve 9.

[0047] The foundation fixing ring 15 is arranged at the bottom of the cap 1, is horizontally arranged on the ground, and is an annular structure coaxially arranged with the pile sleeve 11. The foundation inclined rod 16 extends upwardly and obliquely from the foundation fixing ring 15, the inclined spring is sleeved on the outer side of the foundation inclined rod 16, and the two ends of the inclined spring are respectively abutted with the foundation fixing ring 15 and the pier sleeve 9. The foundation fixing ring 15 reinforces the sleeve connector, disperses part of the stress of the sleeve connector to the foundation fixing ring 15, and then transmits the stress to the ground, expands the stress acting area, cooperates with the inclined spring to reduce the structural deformation, and further improves the stability and load capacity of the cap 1.

[0048] In the embodiment, as a preferred, the receiving pipe network 4 and the supporting pipe network 5 are respectively arranged in three layers, the three layers of the receiving pipe network 4 are arranged from top to bottom, and the inclination angles of the three layers of the receiving pipe network 4 corresponding to the force relieving network part 8 gradually decrease, and the supporting pipe network 5 is vertically aligned with the receiving pipe network 4.

[0049] The receiving pipe network 4 is located on the upper layer of the bearing platform 1, the receiving pipe network 4 is located on the lower layer of the bearing platform 1, the receiving pipe network 4 and the supporting pipe network 5 are arranged at intervals. The three layers of the receiving pipe network 4 are arranged from top to bottom, and the inclination angles of the load relief network parts 8 of the three layers of the receiving pipe network 4 gradually decrease, and the supporting pipe network 5 is vertically aligned with the receiving pipe network 4. It can be understood that the load relief network part 8 of the first layer of the receiving pipe network 4 has the maximum slope, the vertical stress is applied to the inclined surface of the load relief network part 8, the stress decomposition effect is more obvious, and the vertical stress can be offset, and the horizontal stress can be generated. The inclination angles of the load relief network parts 8 of the second and third layers of the receiving pipe network 4 gradually decrease, the influence of the horizontal stress on the bearing platform 1 can be reduced, and the offset effect of the vertical stress is considered.

[0050] In the embodiment, as preferred, the receiving pipe network 4 and the supporting pipe network 5 respectively include a plurality of longitudinally and transversely intersecting receiving stress pipes 17 and supporting stress pipes 18, the receiving stress pipes 17 and the supporting stress pipes 18 are hollowly arranged, and the stress cables 19 are inserted into the receiving stress pipes 17 and the supporting stress pipes 18, the stress cables 19 extend from both ends of the receiving stress pipes 17 and the supporting stress pipes 18, and the stress cables 19 are connected with the fastening assemblies.

[0051] The receiving pipe network 4 respectively includes a plurality of longitudinally and transversely intersecting receiving stress pipes 17, and the supporting pipe network 5 respectively includes a plurality of longitudinally and transversely intersecting supporting stress pipes 18. The receiving stress pipes 17 and the supporting stress pipes 18 are hollowly arranged, and the stress cables 19 are inserted into the receiving stress pipes 17 and the supporting stress pipes 18. The end portions of the stress cables 19 extend from the receiving stress pipes 17 and the supporting stress pipes 18. When the stress cables 19 are installed, the pre-stress tension method is adopted, the stress cables 19 are in a stretched state, and the stress cables 19 are fixed through the fastening assemblies, so that the supporting pipe network 5 and the receiving pipe network 4 have longitudinal pre-stress, and the bearing capacity and the anti-deformation capacity of the bearing platform 1 are improved.

[0052] In the embodiment, as preferred, the fastening assembly includes a limiting cable sleeve 20 arranged at the end portion of the stress cable 19, and a stop flange 21 arranged at the end portion of the receiving stress pipe 17 and the supporting stress pipe 18, and a transverse spring is connected between the limiting cable sleeve 20 and the stop flange 21.

[0053] The limiting cable sleeve 20 is fixed at the end portion of the stress cable 19, and the diameter of the limiting cable sleeve 20 is greater than the diameter of the receiving stress pipe 17 and the supporting stress pipe 18. The stop flange 21 is fixed at the end portion of the receiving stress pipe 17 and the supporting stress pipe 18, and the stop flange 21 and the limiting cable sleeve 20 abut against each other. The transverse spring is located between the limiting cable sleeve 20 and the stop flange 21, and the stress cable 19 is in a stretched state after the stress cable 19 is subjected to the stretching force, and the transverse spring is in a compressed state, so that the fastening force is increased, the structural deformation is reduced, part of the horizontal stress is offset, and the stability and the load capacity of the bearing platform 1 are improved.

[0054] Referring to Figures 1 to 9 Another embodiment provided by the application is as follows:

[0055] A construction method of a high bridge large-span pile cap 1 structure, characterized in that it comprises the following steps:

[0056] Step 1, constructing a pile foundation 3:

[0057] Drill a pile hole under the ground, check the construction drawing, determine the position where the pier 2 needs to be set up, mark the pile hole corresponding vertically, the marked pile hole as a reference hole, the pile fixing sleeve is embedded in the reference hole, the upper end of the pile fixing sleeve extends from the ground; vertically place the reinforcement cage into the pile hole, the reinforcement cage is staggered connected with the pile fixing sleeve, pour concrete into the reinforcement cage, and the pile foundation 3 is obtained after the concrete reaches the design strength;

[0058] The pile fixing sleeve is embedded in the reference hole, which comprises inserting a plurality of pile fixing vertical rods 12 into the through holes on the surface of the pile fixing sleeve ring 11, the pile fixing sleeve ring 11 is installed along the pile fixing vertical rods 12 at intervals, and the two are welded and fixed. The pile fixing sleeve is vertically placed in the reference hole by hoisting. In addition, the reinforcement cage can be arranged outside the pile fixing sleeve, and the two are staggered connected and welded and fixed, and are vertically placed in the reference hole together.

[0059] Step 2, constructing a pile cap 1:

[0060] Build a pile cap 1 reinforcement frame above the pile foundation 3, lay a support pipe network 5 at the lower position of the pile cap 1 reinforcement frame, and lay a receiving pipe network 4 at the upper position of the pile cap 1 reinforcement frame, the support pipe network 5 and the receiving pipe network 4 are distributed at intervals, and the support net part 6 is vertically aligned with the reference hole; draw a range on the ground according to the size of the pier 2, the support net part 6 corresponds to the inside of the pier 2, and the force relief net part 8 corresponds to the outer edge of the pier 2; prestress is applied to the support pipe network 5 and the receiving pipe network 4 by prestress tensioning; the pier fixing sleeve is vertically connected with the pile foundation 3 sleeve, and is fixed by the sleeve connector, the upper end of the pier fixing sleeve extends from the pile cap 1 reinforcement frame, and the sleeve connector is fixed above the support pipe network 5 and the receiving pipe network 4; pour concrete into the pile cap 1 reinforcement frame, and the pile cap 1 is obtained after the concrete reaches the design strength;

[0061] The support pipe network 5 is laid at the lower position of the pile cap 1 reinforcement frame, which comprises longitudinally and transversely interlacing the support stress pipes 18 to connect them into a net structure, and inserting the stress cables 19 into the support stress pipes 18, and connecting and fixing the stress cables 19 by the fastening assembly after applying tension to the ends of the stress cables 19 to a suitable prestress.

[0062] The support pipe network 4 is laid on the upper layer of the reinforced frame of the bearing platform 1, including drawing the range of the pier column 2 on the ground in advance, crossing the horizontal support stress pipe 18 longitudinally and transversely, connecting it as the bearing network part 6, and aligning it with the internal position of the pier column 2; connecting the inclined support stress pipe 18 along the outer side of the bearing network part 6, connecting it as the force relieving network part 8, and aligning it with the outer edge position of the pier column 2; connecting the horizontal support stress pipe 18 along the outer side of the force relieving network part 8, connecting it as the extension network part 7, and aligning it with the position of the support pipe network 5; the internal stress cable 19 is inserted into the support stress pipe 18, and after the appropriate prestress is applied to both ends of the stress cable 19, the fastening assembly is connected and fixed.

[0063] The pier fixing assembly is vertically connected with the pile foundation 3 assembly, including sleeving the assembly outer ring 14 into the pile fixing assembly, and the pile fixing vertical rod 12 is not connected with the assembly outer ring 14; the assembly inner ring 13 is sleeved from the upper end of the pile fixing assembly, the pile fixing vertical rod 12 is inserted into the through hole of the assembly inner ring 13 and is welded and fixed; the assembly outer ring 14 is moved upward, the assembly inner ring 13 is clamped in the stepped groove of the assembly outer ring 14, and the two are clamped, welded and fixed; a plurality of pier fixing vertical rods 10 are inserted into the through holes on the surface of the pier fixing sleeve ring 9, the pier fixing sleeve ring 9 is installed along the pier fixing vertical rod 10 at intervals, and the two are welded and fixed, and the lower end of the pier fixing vertical rod 10 is inserted into the through hole of the assembly outer ring 14 by hoisting and is welded and fixed.

[0064] Step 3, constructing the pier column 2:

[0065] The reinforced frame of the pier column 2 is built on the bearing platform 1, the reinforced frame of the pier column 2 is connected with the pier fixing assembly, the concrete is poured into the reinforced frame of the pier column 2, and the pier column 2 is obtained after the concrete reaches the design strength.

[0066] The above is only a preferred embodiment of the present application and is not used to limit the present application, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high bridge large-span pile cap structure, comprising a horizontally arranged pile cap, symmetrically arranged pier columns on both sides of the pile cap, and uniformly arranged pile foundations under the pile cap, the pier columns and the pile foundations are coaxially arranged, a fixing mechanism is arranged between the pier columns and the pile foundations, and a supporting mechanism is arranged inside the pile cap, characterized in that: the fixing mechanism comprises a pier fixing sleeve arranged inside the pier column, a pile fixing sleeve arranged inside the pile foundation, and a sleeve connector arranged inside the pile cap, the sleeve connector is arranged in a vertical direction, the pier fixing sleeve and the pile fixing sleeve are vertically extended into the pile cap, and are connected with each other through the sleeve connector; the supporting mechanism comprises a receiving pipe network arranged on the upper layer of the pile cap and a supporting pipe network arranged on the lower layer of the pile cap, the receiving pipe network and the supporting pipe network are arranged in a spaced manner, and are respectively connected with the bottom of the sleeve connector; the receiving pipe network is in a upward protruding structure, comprising an upper and lower arranged supporting network part and an extended network part, a force relieving network part is connected between the supporting network part and the extended network part, the supporting network part is horizontally arranged and corresponds to the position inside the pier column, and the force relieving network part is arranged in an inclined manner and corresponds to the position outside the pier column; the pier fixing sleeve comprises a pier fixing sleeve ring and a plurality of pier fixing vertical rods arranged around the pier fixing sleeve ring, the pier fixing vertical rods are vertically extended from the top of the pier column to the bottom of the pile cap and are tightly connected with the pier fixing sleeve ring; the pile fixing sleeve comprises a pile fixing sleeve ring and a plurality of pile fixing vertical rods arranged around the pile fixing sleeve ring, the pile fixing vertical rods are vertically extended from the bottom of the pile foundation to the top of the pile cap and are tightly connected with the pile fixing sleeve ring, and the pier fixing vertical rods and the pile fixing vertical rods are fixed through the sleeve connector; the sleeve connector comprises a sleeve inner ring and a sleeve outer ring arranged in a coaxial manner, the sleeve inner ring is embedded in the sleeve outer ring and is fixed through clamping; the sleeve inner ring is vertically aligned with the pile fixing sleeve ring and is inserted with the pile fixing vertical rods, the sleeve outer ring is vertically aligned with the pier fixing sleeve ring and is inserted with the pier fixing vertical rods; longitudinal springs are respectively arranged between adjacent sleeve inner rings and between adjacent sleeve outer rings and are sleeved on the outside of the pile fixing vertical rods and the pier fixing vertical rods; the fixing mechanism further comprises a foundation fixing ring arranged at the bottom of the pile cap, the foundation fixing ring is coaxially arranged with the pile fixing sleeve ring and is connected with a foundation inclined rod, the foundation inclined rod is inclinedly extended upward from the foundation fixing ring, an inclined spring is sleeved on the outside of the foundation inclined rod, and the two ends of the inclined spring are respectively abutted with the foundation fixing ring and the pier fixing sleeve ring; the receiving pipe network and the supporting pipe network respectively comprise a plurality of longitudinally and transversely intersected receiving stress pipes and supporting stress pipes, the receiving stress pipes and the supporting stress pipes are hollowly arranged and internally inserted with stress cables, the stress cables are extended from both ends of the receiving stress pipes and the supporting stress pipes and are connected with fastening assemblies. The receiving pipe network and the supporting pipe network are respectively arranged in three layers in a spaced manner, the three layers of the receiving pipe network are arranged from top to bottom, and the inclination angles of the force relieving network parts gradually decrease, and the supporting pipe network is vertically aligned with the receiving pipe network. The fastening assembly comprises a limiting cable sleeve arranged at the end of the stress cable and a stop flange arranged at the end of the receiving stress pipe and the supporting stress pipe, and a transverse spring is arranged between the limiting cable sleeve and the stop flange. The method comprises the following steps: Step 1, constructing a pile foundation: ​ ​ ​ 2. The high-level bridge large-span pile cap structure according to claim 1, characterized in that: ​ 3. The high-level bridge large-span pile cap structure according to claim 1, characterized in that: ​ 4. The construction method of the high bridge large-span pile cap structure according to any one of claims 1-3, characterized in that, ​ ​ Drilling pile hole under the ground, checking construction drawing, determining the position where the pier column needs to be set up, marking the pile hole corresponding to the vertical position, the marked pile hole as a reference hole, pile fixing sleeve set in the reference hole, the upper end of the pile fixing sleeve protruding from the ground; the steel cage is vertically placed in the pile hole, the steel cage is staggered connected with the pile fixing sleeve, the concrete is poured into the steel cage, and the pile foundation is obtained after the concrete reaches the design strength; Step 2, construct the pile cap: The pile cap steel reinforcement frame is built above the pile foundation, the support pipe network is laid at the lower layer position of the pile cap steel reinforcement frame, the bearing pipe network is laid at the upper layer position of the pile cap steel reinforcement frame, the support pipe network and the bearing pipe network are distributed at intervals, and the supporting net part is vertically aligned with the reference hole; the construction range of the pile cap is drawn on the ground according to the size of the pier column, the supporting net part corresponds to the inside of the pier column, and the force relief net part corresponds to the outer edge of the pier column; prestress tension is carried out to apply prestress to the support pipe network and the bearing pipe network; the pier fixing sleeve is vertically connected with the pile fixing sleeve and is fixed through the sleeve connector, the upper end of the pier fixing sleeve protrudes from the pile cap steel reinforcement frame, and the sleeve connector is fixed above the support pipe network and the bearing pipe network; the concrete is poured into the pile cap steel reinforcement frame, and the pile cap is obtained after the concrete reaches the design strength; Step 3, construct the pier column: The pier column steel reinforcement frame is built above the pile cap, the pier column steel reinforcement frame is staggered connected with the pier fixing sleeve, the concrete is poured into the pier column steel reinforcement frame, and the pier column is obtained after the concrete reaches the design strength.

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