Search

CN-122013678-A - Pre-buried connection structure for hoisting I-beam and construction method

CN122013678ACN 122013678 ACN122013678 ACN 122013678ACN-122013678-A

Abstract

The invention relates to the technical field of bridge construction, and particularly discloses an embedded connection structure for hoisting an I-beam and a construction method, wherein the embedded connection structure comprises a U-shaped steel strand and a positioning mechanism for assisting the U-shaped steel strand to be positioned and embedded, the positioning mechanism comprises a base, fixing pieces rotatably arranged at two ends of the base and positioning plates hinged at two sides of the base, a limiting groove is formed in the top of the base for supporting bending sections of the U-shaped steel strand, the fixing pieces are in a working state and an avoidance state of being retracted and withdrawn, the positioning plates are in an outwards-unfolded positioning state and a downwards-folded receiving state, and the positioning plates are provided with containing grooves with clamping pieces; the invention provides physical isolation and stable clamping for each U-shaped steel strand, solves the problem of the close adhesion of adjacent steel strands caused by forced extrusion in the traditional binding process, effectively prevents the U-shaped steel strands from shifting caused by impact during concrete pouring, and ensures the pre-buried quality.

Inventors

  • ZHOU XIHAI
  • CAI XIAOSI
  • LI ZHIGUO
  • TANG ZHIHONG
  • JIA WENBO
  • PAN CHANGSHENG
  • MA MINGYANG
  • CAO JUNCHAO
  • YUAN DEBIN
  • HU XIANFEI
  • HOU XIAOFENG
  • HUANG JINCHENG
  • ZENG WEI
  • WANG XUYANG
  • HUANG YUAN
  • BAI YONGLIANG
  • LI ZHAO
  • ZHANG HANZHAO

Assignees

  • 保利长大工程有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. The embedded connecting structure for hoisting the I-beam comprises a U-shaped steel stranded wire (11) and is characterized by further comprising a positioning mechanism for assisting the U-shaped steel stranded wire (11) in positioning and embedding, wherein the positioning mechanism comprises a base (2), a fixing piece (3) and a positioning assembly; The top of base (2) is equipped with spacing groove (201) that a plurality of are used for bearing U shaped steel stranded conductor (11) bending section along its length direction, mounting (3) rotate and install both ends around base (2), mounting (3) have can fix base (2) between two adjacent reinforcing bars (13) in I-beam (12) top, and can follow the state of dodging of withdrawing outward between two adjacent reinforcing bars (13) with base (2), locating component includes two locating plates (4) of hinging respectively in base (2) left and right sides wall, locating plate (4) have the storage state of drawing in downwards in base (2) bottom and the location state of outwards upset expansion for base (2) lateral wall, all be equipped with a plurality of holding grooves (401) that are used for holding U shaped steel stranded conductor (11) vertical section along its length direction interval on every locating plate (4), be equipped with in holding groove (401) and be used for carrying out clamp with release holder (5) to U shaped steel stranded conductor (11), be in the state and locating plate (4) when mounting (3) are in dodging state and locating plate (4) and the maximum width of two vertical section steel strand wires is in between the vertical section of two section of vertical section of section steel mechanism (11).
  2. 2. The embedded connecting structure for hoisting an I-beam according to claim 1, wherein a chute (21) is formed in the top of the base (2) along the length direction of the base, a plurality of limiting blocks (22) capable of moving independently are slidably mounted in the chute (21), the limiting blocks (22) can slide along the chute (21) and lock, and a limiting groove (201) is formed in the top end of each limiting block (22).
  3. 3. The embedded connection structure for hoisting an i-beam according to claim 1, wherein the fixing member (3) comprises four supporting arms (31) and four locking blocks (32), the four supporting arms (31) are hinged to the front end and the rear end of the base (2) respectively in a pair of two groups, the locking blocks (32) can rotate in a horizontal plane around a hinge axis, the locking blocks (32) are mounted at the lower ends of the supporting arms (31) and can slide and lock along the length direction of the supporting arms (31), when the fixing member (3) is in a working state, the supporting arms (31) rotate to a position perpendicular to the length direction of the base (2), so that the supporting arms (31) can be lapped on reinforcing steel bars (13) on two sides, at the moment, the locking blocks (32) slide along the supporting arms (31) to be buckled on the reinforcing bars (13), and when the fixing member (3) is in a avoiding state, the supporting arms (31) rotate to a position parallel to the length direction of the base (2), so that the supporting arms (31) can be stored on an end extension line of the base (2).
  4. 4. The embedded connecting structure for hoisting an i-beam according to claim 1, wherein the clamping piece (5) comprises a fixed block (51) and a movable clamping block (52) which are arranged in the accommodating groove (401), the fixed block (51) is fixedly arranged on one side inner wall of the accommodating groove (401), the movable clamping block (52) is slidably arranged in the accommodating groove (401) and can move and lock in a direction close to the fixed block (51), and a clamping channel for passing through the vertical section of the U-shaped steel stranded wire (11) is formed between the movable clamping block (52) and the fixed block (51).
  5. 5. The embedded connecting structure for hoisting an i-beam according to claim 3, wherein the supporting arm (31) is further provided with a first driving structure for driving the locking block (32) to slide, the first driving structure comprises a first screw rod (33), the first screw rod (33) is rotatably installed in the supporting arm (31) along the length direction of the supporting arm (31), one end of the first screw rod (33) far away from the base (2) is provided with an adjusting handle, and the locking block (32) is provided with a threaded hole in threaded fit with the first screw rod (33).
  6. 6. The embedded connection structure for hoisting an I-beam according to claim 4, wherein the positioning plate (4) is further provided with a second driving structure for driving the movable clamping block (52) to slide, the second driving structure comprises a second screw rod (53), the second screw rod (53) is rotatably arranged in the positioning plate (4) along the length direction of the positioning plate (4), one end of the second screw rod (53) penetrates through the positioning plate (4) and is provided with an adjusting handle, and the movable clamping block (52) is provided with a threaded hole in threaded fit with the second screw rod (53).
  7. 7. The embedded connection structure for hoisting an i-beam according to claim 1, wherein the positioning plate (4) is of a telescopic structure, so that the width of the positioning plate (4) can be adjusted, and the transverse distance between the accommodating grooves (401) on two sides can be adjusted to adapt to the U-shaped steel strands (11) with different opening widths.
  8. 8. The embedded connecting structure for hoisting an I-beam according to claim 4, wherein a concave arc-shaped surface matched with the U-shaped steel stranded wire (11) is arranged on one side of the movable clamping block (52) facing the clamping channel.
  9. 9. The pre-buried connection structure for hoisting an i-beam according to claim 8, wherein the side of the fixed block (51) facing the clamping channel and the concave arc surface of the movable clamping block (52) are both provided with rough structures.
  10. 10. A construction method for hoisting an i-beam, characterized in that an embedded connection structure for hoisting an i-beam according to any one of claims 1-9 is used, comprising the steps of: S1, mounting, namely placing a fixing piece (3) in an avoidance state, placing a positioning plate (4) in a storage state, inserting a positioning mechanism into a gap between two adjacent steel bars (13) at the top of an I-beam (12), switching the fixing piece (3) to a working state, fixing a base (2), and outwards overturning and unfolding the positioning plates (4) at two sides of the base (2) to switch the positioning plate to the positioning state; S2, arranging the U-shaped steel stranded wires (11) to be pre-buried in an aligned manner from the upper part of the base (2), and enabling the vertical sections at the two ends of the U-shaped steel stranded wires (11) to respectively penetrate through the containing grooves (401) on the positioning plates (4) at the two sides until the bending sections of the U-shaped steel stranded wires (11) fall into the limit grooves (201) at the top of the base (2); S3, clamping, namely after the layout of all the U-shaped steel stranded wires (11) is completed, clamping and fixing the vertical section of the U-shaped steel stranded wires (11) through a clamping piece (5); S4, pouring the I-shaped beam (12), after pouring is completed and the preset strength is achieved, releasing the clamping of the clamping piece (5) on the U-shaped steel stranded wire (11), reversely overturning the positioning plate (4) to a storage state, switching the fixing piece (3) to an avoidance state, and then withdrawing the positioning mechanism from the pre-buried U-shaped steel stranded wire (11).

Description

Pre-buried connection structure for hoisting I-beam and construction method Technical Field The invention relates to the technical field of bridge construction, in particular to an embedded connection structure for hoisting an I-beam and a construction method. Background In the engineering fields of building construction, bridge erection, large-scale equipment installation and the like, the I-beam is used as a bearing member, an overhanging supporting member and a hoisting transition member due to excellent bending and shearing resistance and higher material utilization rate. The hoisting connection stability of the I-beam is directly related to the safety of the whole construction system, and the embedded connection structure is used as a core component for the connection of the I-beam and the main body structure, so that the design rationality and the construction convenience become key influencing factors of engineering construction. The Chinese patent document with the bulletin number of CN112112055B discloses an embedded part embedded device of a large-scale bridge crossing a river and a construction method, the embedded part embedded device comprises a base plate arranged on a concrete pouring ground, an embedded device body is arranged on the base plate, the embedded device body comprises a bracket, and a connecting rod and a supporting rod which are arranged on the bracket. When the embedded device is used, the embedded device body is formed by the support, the connecting rod and the supporting rod, so that the embedded device is convenient to hoist, the support is pressed by fixing the pressing plate on the reinforcing steel bar on the concrete pouring ground, the embedded device is fixed, and the embedded device is more convenient to install and is also fixed more firmly. In the prior art, the steel strand embedded anchoring structure is a structure adopted in partial engineering in recent years, the structure adopts steel strands as anchoring parts, the steel strands need to penetrate through a steel reinforcement cage at the top of an I-beam, two ends are bent and embedded into concrete, iron wires are adopted for binding and fixing the steel strands, and only a middle section is reserved to form a U-shaped exposed end for connection of a lifting appliance. When the steel strands are buried in advance, the problems that when a plurality of steel strands are densely arranged, the steel strands are easy to squeeze and are gathered and adhered to prevent concrete aggregate from filling gaps, so that 'hollowness' or 'honeycomb' is generated on a contact surface, the grip strength and the anti-pulling safety are seriously weakened, in addition, the steel strands are easily damaged and simple bottom binding is extremely easy to occur due to strong impact and high-frequency excitation during concrete pouring, the steel strands are inclined, float upwards or deflect, the position deviation not only causes insufficient burial depth and uneven stress, causes potential safety hazards of hoisting, but also causes difficulty in hooking a follow-up lifting hook due to inaccurate positioning, and the construction quality is seriously influenced. Disclosure of Invention The invention provides an embedded connection structure for hoisting an I-beam and a construction method, and aims to solve the problems that a steel strand in the related art is difficult to maintain a design distance, is easy to be bonded together and is difficult to maintain positioning accuracy in a dynamic pouring environment. In a first aspect, the embedded connection structure for hoisting the I-beam comprises a U-shaped steel stranded wire, and also comprises a positioning mechanism for assisting the U-shaped steel stranded wire in positioning and embedding, wherein the positioning mechanism comprises a base, a fixing piece and a positioning assembly; The top of base is equipped with a plurality of spacing grooves that are used for bearing U shaped steel stranded conductor bending section along its length direction, the mounting rotates the front and back both ends of installing at the base, the mounting has the operating condition that can fix the base between two adjacent reinforcing bars in I-beam top, and can outwards withdraw from the base between two adjacent reinforcing bars dodge the state, positioning assembly includes two locating plates that articulate respectively in the base left and right sides wall, the locating plate has the storage state of drawing in the base bottom downwards and outwards overturn the location state of expansion for the base lateral wall, all be equipped with a plurality of holding tanks that are used for holding the vertical section of U shaped steel stranded conductor along its length direction on every locating plate, be equipped with in the holding tank and be used for pressing from both sides tight and release clamping piece to U shaped steel stranded conductor, when the mounting is in dodging the