CN-122013717-A - High-pile wharf cast-in-situ beam construction method based on reinforcement portion qualification and jig frame

CN122013717ACN 122013717 ACN122013717 ACN 122013717ACN-122013717-A

Abstract

The invention provides a construction method and a jig frame of a cast-in-situ cross beam of a high pile wharf based on reinforcement part qualification, wherein the construction method comprises the steps of collecting actual position data of a pile top of a steel pipe pile; the method comprises the steps of comparing actual position data and theoretical position data of steel pipe pile tops, calculating plane deviation and elevation deviation of each steel pipe pile top, calculating bending parameters and correction length of main reinforcements of beam part steel bars corresponding to each steel pipe pile according to the plane deviation of each steel pipe pile top, enabling reserved holes of the beam part steel bars to be aligned with the steel pipe piles, enabling overlap joint lengths of the main reinforcements of two adjacent beam part steel bars to meet requirements, manufacturing part steel bars by using steel bar binding jig frames, installing a bottom template on the steel pipe piles, placing the part steel bars on the bottom template, binding residual steel bars, installing side templates, pouring concrete, and removing the templates. The invention greatly reduces the operation time on water, effectively avoids the limitation of tidal water on the construction time, and remarkably improves the construction efficiency.

Inventors

ZHANG YANG
CHEN DONGFENG
Hong Julong
LIN HONGXING
SHI SHAOZHI
HE CONG
ZHANG HONG
TANG HENG
WANG HAINAN
XIA XINXING
LIN CHEN

Assignees

中交第二航务工程局有限公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (10)

1. A construction method of a cast-in-place beam of a high pile wharf based on reinforcement portion qualification is characterized by comprising the following steps: collecting actual position data of the pile top of the steel pipe pile; comparing actual position data and theoretical position data of the pile tops of the steel pipe piles, and calculating plane deviation and elevation deviation of each pile top of the steel pipe piles; Calculating bending parameters and correction lengths of main reinforcements (5) of the beam part steel bars (1) corresponding to each steel pipe pile according to the plane deviation of the pile top of each steel pipe pile, so that reserved butt joint holes (45) of the beam part steel bars (1) are aligned with the steel pipe pile, and the lap joint length of the main reinforcements (5) of two adjacent beam part steel bars (1) meets the requirement; Manufacturing part reinforcing steel bars by using reinforcing steel bar binding jig frames; installing a bottom template on the steel pipe pile, placing the part steel bars on the bottom template and binding the rest steel bars; Installing a side template; Pouring concrete and removing the template.
2. The construction method of the cast-in-situ cross beam of the high pile wharf based on reinforcement portion engineering according to claim 1, wherein the method is characterized in that each steel pipe pile is subjected to deflection grading according to the plane deflection of the pile top of each steel pipe pile: the plane deviation is the distance between the actual plane position and the theoretical plane position of the pile top of the steel pipe pile; If the plane deviation is less than or equal to the primary plane deviation, prefabricating a beam part steel bar (1) according to the standard size, wherein the steel pipe pile is the primary deviation; If the primary plane deviation is smaller than or equal to the plane deviation and smaller than or equal to the secondary plane deviation, the steel pipe pile is secondary deviation, and the main reinforcement (5) of the beam part steel bar (1) corresponding to the steel pipe pile is bent and adjusted in length; if the second-level plane deviation is smaller than or equal to the plane deviation and smaller than or equal to the third-level plane deviation, the steel pipe pile is out of tolerance deviation, and the pile top position adjusting device is adopted to rectify the steel pipe pile.
3. The method for constructing the cast-in-situ cross beam of the high pile wharf based on the reinforcement portion assembly of claim 1, wherein the elevation deviation is equal to the actual elevation of the pile top of the steel pipe pile minus the theoretical elevation, and if the elevation deviation is greater than a preset elevation deviation threshold, the steel pipe pile is truncated so that the elevation deviation is not greater than the preset elevation deviation threshold.
4. The construction method of the cast-in-situ cross beam of the high pile wharf based on the reinforcement portion production according to claim 2, wherein the calculation of the bending position and the correction length of the main reinforcement (5) of each cross beam portion reinforcement (1) according to the plane deviation of each steel pipe pile top comprises the following steps: the plane deflection comprises transverse deflection and longitudinal deflection, wherein the transverse deflection represents deflection along the width direction of the steel bar (1) of the beam part, and the longitudinal deflection represents deflection along the length direction of the steel bar (1) of the beam part; The main reinforcements of the beam part reinforcing steel bar (1) comprise a through long main reinforcement (43) and a non-through long main reinforcement (44), the through long main reinforcement (43) is a main reinforcement with the design length equal to that of the beam part reinforcing steel bar (1), the rest main reinforcements are the non-through long main reinforcements (44), each beam part reinforcing steel bar (1) is provided with a plurality of butt joint holes (45) corresponding to a plurality of steel pipe piles one by one, the plurality of butt joint holes (45) are arranged along the length direction of the beam part reinforcing steel bar (1), and the through long main reinforcements (43) are positioned on two sides of the plurality of butt joint holes (45); the following steps are carried out for each beam part reinforcing steel bar (1): Judging whether secondary offset steel pipe piles exist in a plurality of steel pipe piles corresponding to the current beam part steel bars (1), and if so, adjusting main bars of the beam part steel bars (1) according to plane offset conditions of all the secondary offset steel pipe piles: defining a butt joint hole (45) corresponding to the second-level offset steel pipe pile as a second-level butt joint hole; traversing each secondary offset steel pipe pile: Judging whether the steel pipe pile with the i second-level deviation has longitudinal deviation, If the steel pipe pile with the i second-level deviation has longitudinal deviation, extending or shortening the length of a non-through length main rib (44) corresponding to the i second-level butt joint hole, which is close to one end of the second-level butt joint hole, so that the second-level butt joint hole and the corresponding steel pipe pile can be aligned, and the extending or shortening length is equal to the longitudinal deviation length; And continuously judging whether the steel pipe pile with the i second-level deviation has the transverse deviation, if so, bending two through-length main ribs (43) closest to the second-level butt joint hole, correcting the length, wherein the bending direction is the transverse deviation direction, and acquiring the coordinate range of the second-level butt joint hole formed by extending or shortening the non-through-length main rib (44) along the length direction of the beam part steel bar (1), wherein the coordinate range is the bending position of the through-length main rib (43), the corrected length = the design length of the through-length main rib (43) plus the bending length of the through-length main rib (43), and the bending length of the through-length main rib (43) is twice the sum of the transverse deviation distances of the steel pipe piles with all the second-level deviations.
5. The construction method of the cast-in-place beam of the high pile wharf based on reinforcement part production according to claim 4, wherein if the steel pipe pile with the ith secondary deviation does not have longitudinal deviation, the steel pipe pile with the ith secondary deviation only has transverse deviation, two through-length main ribs (43) closest to the secondary butt joint holes are bent and corrected in length, the coordinate range of all the secondary butt joint holes along the length direction of the beam part reinforcement (1) is obtained, the coordinate range is the bending position of the through-length main ribs (43), the corrected length = the design length of the through-length main ribs (43) plus the bending length of the through-length main ribs (43), and the bending length of the through-length main ribs (43) = the sum of the transverse deviation distances of the steel pipe pile with the secondary deviation is doubled.
6. The construction method for the cast-in-situ cross beam of the high pile wharf based on reinforcement section according to any one of claims 1 to 5, wherein the step of manufacturing the section reinforcement by using the reinforcement bar binding jig comprises the steps of: binding the beam part product steel bars (1) by using the beam part product steel bar jig frame: The beam part product steel bar (1) comprises a lower main bar, an upper main bar, a tie bar (6), a lower beam stirrup (7) and an upper beam stirrup (8), wherein the lower main bar and the upper main bar are respectively positioned at the upper part and the lower part of the beam part product steel bar (1), the lower beam stirrup (7) is bound with the lower main bar, the upper beam stirrup (8) is bound with the upper main bar and part of the lower main bar, and a butt joint hole (45) is formed at the lower part of the beam part product steel bar (1); the position of a limit clamping groove (39) of the beam part product steel bar jig is adjusted according to the main bar spacing of the beam part product steel bar (1); The positions of the positioning baffles (38) of the beam part product steel bar jig frame are adjusted according to the bending length and the bending direction of part of the lower main bars, so that after the lower main bars of the lowest layer are arranged on the beam part product steel bar jig frame, all the positioning baffles (38) are attached to the lower main bars of the lowest layer; Preparing a lower main rib with a corresponding length according to the corrected length of part of the lower main rib, and bending the lower main rib to be bent according to the bending position and the bending length; The lower main reinforcement of the lowest layer is arranged on a limit clamping groove (39) of a beam part product reinforcing steel bar jig frame, a lower beam stirrup (7) is bound, and other lower main reinforcements and corresponding lacing wires (6) are bound; binding an upper main rib, an upper cross beam stirrup (8) and a corresponding lacing wire (6).
7. The method for constructing the cast-in-situ cross beam of the high pile wharf based on the reinforcement portion production according to any one of claims 1 to 5, wherein the step of installing the bottom template on the steel pipe pile comprises the steps of: the steel pipe pile is provided with a hoop (21), a main beam (25) and a distribution beam (26) are arranged on the hoop (21), and a beam bottom die (29) is arranged on the main beam (25) and the distribution beam (26); installing an inner pile bottom mould (33) in the steel pipe pile, wherein the inner pile bottom mould (33) is fixed in the steel pipe pile by adopting a steel bar hanger (30); sealing the space between the pile inner die (33) and the inner wall of the steel pipe pile and the space between the beam bottom die (29) and the outer wall of the steel pipe pile; the sand bags are adopted for grading prepressing, n hours are continuously observed, at least one tide cycle is included in the n hours, sedimentation deformation data of a crossbeam bottom die (29) are recorded, and the sedimentation deformation is compensated by adopting a fine adjustment screw rod (23) of a hoop (21).
8. The method for constructing the cast-in-situ cross beam of the high pile wharf based on the reinforcement portion production according to claim 7, wherein sealing the space between the inner bottom die (33) of the pile and the inner wall of the steel pipe pile and the space between the bottom die (29) of the cross beam and the outer wall of the steel pipe pile comprises: A water-swelling water stop strip (31) is arranged between an inner bottom mould (33) of the pile and the inner wall of the steel pipe pile, and a polyurethane sealant and a foam joint mixture are adopted between the water-swelling water stop strip (31) and the inner wall of the steel pipe pile for double plugging (32); If the gap between the beam bottom die (29) and the outer wall of the steel pipe pile is less than or equal to 3mm, filling with nano silicone sealant, and if the gap between the beam bottom die (29) and the outer wall of the steel pipe pile is more than 3mm, sealing with a stainless steel sheet and sealant combination.
9. The construction method for the cast-in-place beam of the high pile wharf based on the reinforcement portion product according to any one of claims 1 to 5, wherein the steps of placing the portion reinforcement on the bottom formwork and binding the remaining reinforcement include: the part steel bars comprise a beam part steel bar (1), a pile inner part steel bar (2), a head part steel bar (4) and a head reinforcing part steel bar (3); installing an angle locating plate on an inner pile bottom die (33), wherein the inclination angle of the angle locating plate is consistent with that of the steel pipe pile, hoisting the steel bar (2) of the inner pile to the inner pile bottom die (33), and bending the top of the steel bar (2) of the inner pile in the inclined steel pipe pile (19) to enable the steel bar exposed out of the pile top to be in a vertical state; Binding a temporary rigid support on the beam part steel bar (1), installing an elastic guide sleeve at a butt joint hole (45) of the beam part steel bar (1), hoisting the beam part steel bar (1) onto a beam bottom die (29), and guiding the butt joint hole (45) of the beam part steel bar (1) to butt joint with the pile interior part steel bar (2) and the steel pipe pile by the elastic guide sleeve; installing prefabricated ship leaning components at the end heads of the beam part product steel bars (1), and lifting and installing the end head part product steel bars (4) and the end head reinforcing part product steel bars (3) to the end heads of the beam part product steel bars (1); And the steel bars (20) to be bound on site comprise round stirrups (10) at the tops of the steel bars (2) of the products in the pile and the reinforcing bars at the outer sides of the pile tops of the steel pipe piles, wherein the steel bars between two adjacent beam part product steel bars (1) are bound on site.
10. The jig frame for the construction method of the cast-in-place cross beam of the high pile wharf based on reinforcement portion production is characterized by comprising a cross beam portion product reinforcement jig frame, wherein the cross beam portion product reinforcement jig frame comprises longitudinal beams (34) and cross beams (35), the cross beams (35) and the longitudinal beams (34) are vertically staggered to form a frame body, a plurality of butt joint holes are formed in the frame body, the positions of the butt joint holes correspond to the theoretical positions of steel pipe piles, steel pipes are arranged at the butt joint holes, a positioning baffle (38) and a limiting U-shaped plate are arranged on the frame body, limiting clamping grooves (39) are formed in the upper surface of the limiting U-shaped plate, the length directions of the positioning baffle (38) and the limiting clamping grooves (39) are parallel to a longitudinal beam (34), the limiting clamping grooves (39) are used for fixing main ribs of the lowest layer of the cross beam portion product reinforcement (1), bolt proppers (40) are arranged on the positioning baffle (38), the bolt proppers (40) are used for adjusting the positions of the positioning baffle (38) along the cross beam direction, and the positions of the main ribs after the positioning baffle (38) are used for limiting the positions of the bent ribs.

Description

High-pile wharf cast-in-situ beam construction method based on reinforcement portion qualification and jig frame Technical Field The invention relates to the technical field of high-pile wharf construction, in particular to a high-pile wharf cast-in-situ beam construction method based on reinforcement and a jig frame. Background The high pile wharf is used as the core structure of port engineering, and its cast-in-situ beam is the key bearing member for connecting pile foundation and upper structure to determine the whole bearing capacity and service life of wharf directly. In the construction of a cast-in-place beam of a high pile wharf, the traditional process generally adopts a process of binding reinforcing bars, supporting a formwork and pouring concrete in situ, namely, firstly, a temporary operation platform is erected on the top of a pile foundation, constructors carry out feeding and binding molding on the reinforcing bars of the beam on the water platform, and after the reinforcing bar framework is accepted by inspection, a template is installed and concrete is poured. However, due to the influence of tidal hydrologic conditions of ports, most high-pile wharfs have obvious tide level fluctuation phenomenon, and when the tide level rises, the tide level is often submerged to the top standard height position of the lower beam, so that two key constraints are formed for cast-in-situ beam construction, namely, the operation time window is limited. The tidal water inundation can lead to the incapability of using a water operation platform, core procedures such as steel bar binding, template installation and the like can be carried out only in a tidal-down period, the effective operation duration of each tidal-down is usually only 3-6 hours, severe weather influence is avoided, frequent interruption of procedure connection is caused, the construction period is greatly prolonged, particularly in a harbor area with a large tidal range, the problem of delay of construction period is more remarkable, and the risk of corrosion of the steel bars is prominent. In the traditional process, after the steel bars are bound and formed on site, if concrete cannot be poured in time, the bound steel bar framework can be directly submerged by seawater in the tide, corrosive media such as chloride ions, salts and the like contained in the seawater can be rapidly attached to the surfaces of the steel bars, so that passivation films on the surfaces of the steel bars are damaged, and corrosion is caused. Even if concrete is poured later, the corrosion products can also cause the reduction of the interfacial binding force between the steel bars and the concrete, weaken the bearing performance of the cross beam, and when serious, the rust removal reworking is needed to be carried out on the corrosion steel bars, so that the construction cost and the construction period are further increased, and meanwhile, the potential safety hazard of the structure is left. In order to alleviate the problems, the prior art tries to improve the method by means of prefabricating a part of steel reinforcement framework in advance and optimizing tidal operation scheduling, the method still needs to be carried out on a water platform in a segmented mode, the water operation time cannot be reduced fundamentally, the connection quality of steel reinforcements at the spliced position is difficult to guarantee, the method can only utilize a tide falling window to the maximum extent through manual scheduling, the time limit of the tide cannot be broken through, and the risk that the steel reinforcements are soaked by seawater in tide rising cannot be avoided. Therefore, how to develop a cast-in-situ beam construction technology capable of reducing the duration of water operation and avoiding the corrosion risk of steel bars and simultaneously considering the construction efficiency and the engineering quality aiming at the tidal environment characteristics of a high-pile wharf becomes a technical problem to be solved in the current port engineering field. Disclosure of Invention The invention aims at overcoming the defects of the prior art, and provides a high pile wharf cast-in-situ beam construction method and a jig frame based on reinforcement assembly, which greatly reduce the water operation time, effectively avoid the limitation of tide on the construction time and remarkably improve the construction efficiency. In order to solve the technical problems, on one hand, the invention provides a construction method of a cast-in-place beam of a high pile wharf based on reinforcement part production, which comprises the following steps: collecting actual position data of the pile top of the steel pipe pile; comparing actual position data and theoretical position data of the pile tops of the steel pipe piles, and calculating plane deviation and elevation deviation of each pile top of the steel pipe piles; Calculating bending parameters and correction l