CN110886219B - Construction method of in-water support dismantling system for cast-in-place bridge steel pipe pile - Google Patents
Construction method of in-water support dismantling system for cast-in-place bridge steel pipe pile Download PDFInfo
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- CN110886219B CN110886219B CN201911053858.3A CN201911053858A CN110886219B CN 110886219 B CN110886219 B CN 110886219B CN 201911053858 A CN201911053858 A CN 201911053858A CN 110886219 B CN110886219 B CN 110886219B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/04—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by cutting-off under water
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Abstract
The invention relates to a construction method of a cast-in-place bridge steel pipe pile underwater support dismantling system, which comprises the following construction steps: 1) construction preparation; 2) protecting the bottom of the bridge deck beam; 3) erecting a steel beam dismantling support; 4) removing the transverse steel beam; 5) removing the longitudinal steel beam; 6) cutting off the steel pipe pile; 7) and (5) pulling out the steel pipe pile. The invention has the beneficial effects that: the invention can limit the position of the transverse steel beam and the longitudinal steel beam through the sliding connector and reduce the interface friction by means of the groove bottom ball in the sliding connector; meanwhile, the sliding connector can be accurately controlled by the sliding adjusting bolt and the stay bar adjusting bolt, so that the difficulty of space positioning is reduced; in addition, the arrangement of the first supporting hoop and the second supporting hoop on the outer side of the steel pipe pile is beneficial to improving the integrity of the structure; according to the invention, the light base plate and the flexible protecting net are sequentially arranged on the lower surface of the bridge surface beam, so that construction protection can be provided for the bridge surface beam, and the safety of a construction structure is improved.
Description
Technical Field
The invention relates to a construction method of a cast-in-place bridge steel pipe pile underwater support dismantling system, belongs to the field of bridge engineering, and is suitable for cast-in-place bridge steel pipe pile underwater support dismantling engineering.
Background
With the gradual maturity of bridge construction technology in China, the underwater support of the steel pipe pile is widely applied to cast-in-place beams, however, the dismantling of the underwater support of the steel pipe pile is always a difficult point of field construction. When the current steel-pipe pile aquatic support demolishs the construction, often have that the construction operation face is little, demolish the low scheduling problem of efficiency of construction to when demolising vertical bailey beam, the risk that the bailey beam sideslip exists and topple has seriously influenced the security of construction.
The existing cast-in-place beam support integrally demolishs and transfers technique among the prior art, its characterized in that: pre-burying a preformed hole on a beam body, enabling a finish rolling deformed steel bar hanging rod to penetrate through the lower end of the preformed hole to be connected with a distribution beam, enabling the upper end of the finish rolling deformed steel bar hanging rod to penetrate through a jack to be anchored on a box girder top, enabling the jack to be started to bear force, utilizing a crane to remove a steel pipe support, and gradually putting down a support system in batches by taking the jack as a power device until the distribution beam, the Bailey beam and a template system are integrally put down to the ground. Although the technology can meet the requirement of dismantling the bracket, the difficulty of site hoisting construction is high, and the problem of efficient dismantling of the steel pipe pile cannot be solved.
In summary, the existing construction technology obtains better construction effect under suitable working conditions, but has improved lifting parts, and does not relate to the construction technology of removing the steel pipe pile. In view of the above, the invention provides a construction method of a cast-in-place bridge steel pipe pile underwater bracket dismantling system, which can reduce the steel pipe pile underwater bracket dismantling construction difficulty, improve the dismantling construction efficiency, improve the stress performance of a construction structure and improve the safety of field construction.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the construction method of the cast-in-place bridge steel pipe pile underwater support dismantling system, which can not only reduce the difficulty of bridge beam slab column dismantling construction, but also improve the supporting efficiency of a supporting system, improve the stress of a construction structure and protect the construction environment.
The construction method of the cast-in-place bridge steel pipe pile underwater support dismantling system comprises the following construction steps:
1) construction preparation: rechecking to determine the position of the steel pipe pile, and delimiting a material stacking site on the bridge surface beam; preparing construction devices and materials required by demolition construction;
2) protecting the bottom of the bridge surface beam: the lower surface of the bridge surface beam is sequentially provided with a light base plate and a flexible protecting net, and the flexible protecting net and the light base plate are tightly connected with the bridge surface beam through a protecting net stirrup;
3) erecting a steel beam dismantling support: sequentially arranging a first supporting hoop and a second supporting hoop on the outer side wall of the steel pipe pile from top to bottom; a connecting groove pipe and a sliding adjusting bolt are arranged on the outer side of the first supporting hoop; a hoop side supporting plate is arranged on the outer side of the second supporting hoop along the annular direction, and a supporting plate diagonal support is arranged between the hoop side supporting plate and the second supporting hoop; arranging an upright column foundation and a guardrail upright column along the circumferential direction at the periphery of the hoop side supporting plate at the outermost side; one end of the vertical stay bar is firmly connected with the lower surface of the sliding connector, and the other end of the vertical stay bar is connected with the stay bar adjusting bolt; one end of the adjusting connecting rod is inserted into the connecting groove pipe, the other end of the adjusting connecting rod is connected with the stay bar adjusting bolt, and the sliding adjusting bolt is connected with the sliding baffle on the adjusting connecting rod; hanging plate sliding grooves are respectively laid on adjacent hoop side supporting plates, so that hanging plate connecting beams on two side edges of the safety hanging plate are connected with the hanging plate sliding grooves through bolts;
4) removing the transverse steel beam: placing a transverse steel beam to be moved in a steel beam sliding groove of the sliding connecting body, connecting the connecting hanging ring with the limiting hanging plate, pressing the sliding baffle plate to control the transverse position of the sliding connecting body through a sliding adjusting bolt, and controlling the top surface elevation of the sliding connecting body through a stay bar adjusting bolt; after the control of the sliding connector is finished, a reinforcing brace is arranged between the adjusting connecting rod and the hoop side brace; arranging a beam moving hoop at the end part of the transverse steel beam, and dragging the transverse steel beam out from the lower part of the bridge surface beam through external dragging equipment;
5) removing the longitudinal steel beam: a sling pull ring connected with a first sling is arranged on the lower surface of the bridge surface beam, and a rotating body top support plate connected with a fixed sling and a second sling is respectively arranged on the upper surface of the bridge surface beam; after the transverse steel beam is dismantled, the elevations of the first supporting hoop and the second supporting hoop are adjusted, then the longitudinal steel beam to be moved is placed in a steel beam chute of the sliding connector, the connecting hanging ring is connected with the limiting hanging plate, the transverse position of the sliding connector is controlled by pressing the sliding baffle plate against the sliding adjusting bolt, and the elevation of the top surface of the sliding connector is controlled by the supporting rod adjusting bolt; after the control of the sliding connector is finished, a reinforcing brace is arranged between the adjusting connecting rod and the hoop side brace; arranging a beam moving hoop at the end part of the longitudinal steel beam, and dragging the longitudinal steel beam to a set position below the bridge surface beam through external dragging equipment; respectively arranging a first suspension hoop and a third suspension hoop at two ends of the longitudinal steel beam, and enabling the second suspension hoop to be arranged on the longitudinal steel beam close to the first suspension hoop; respectively connecting the first sling, the second sling and the fixed sling with the first suspension hoop, the second suspension hoop and the third suspension hoop; after the longitudinal steel beam is lifted up through the first sling and the fixed sling, synchronously tensioning the second sling and extending the first sling to enable the longitudinal steel beam to rotate to a direction vertical to the longitudinal center line of the bridge surface beam under the action of transverse tension, and then dragging the longitudinal steel beam out from the lower part of the bridge surface beam through external dragging equipment;
6) cutting off the steel pipe pile: a first pile cutting hoop and a second pile cutting hoop are respectively arranged below and above a to-be-cut section of the steel pipe pile, and a pile cutting support body is arranged between the first pile cutting hoop and the second pile cutting hoop; a pile cutting supporting plate is arranged on the outer side of the first pile cutting hoop, a protecting net chute and a circumferential protecting net are sequentially arranged on the pile cutting supporting plate, and the protecting net chute and the circumferential protecting net are connected through a chute rivet;
7) removing the steel pipe pile: arranging a first pile pulling hoop on a steel pipe pile to be pulled out, arranging a pile end connector at the top end of the steel pipe pile, and arranging a hanging ring connecting cable between a hoisting balance plate of the pile end connector and a hoop side hanging ring on the outer side wall of the first pile pulling hoop; arranging a second pile pulling hoop and a third pile pulling hoop on the adjacent steel pipe pile, and arranging a pressure-bearing cap plate at the top end of the steel pipe pile; a cap plate aligning body is arranged between the pressure-bearing cap plate and a cap plate supporting plate on the outer side of the second pile pulling hoop; firstly, adjusting the top surface evenness of the pressure-bearing cap plate through the cap plate position correcting body, and then sequentially placing a platform beam and a platform support plate on the pressure-bearing cap plate; the periphery of the platform supporting plate is provided with a rigid protective column and a flexible protective column from inside to outside, and an elastic connecting body is arranged between the rigid protective column and the flexible protective column; a reinforcing pull rod is arranged between the platform support plate and the third pile pulling hoop, and the tension strength of the reinforcing pull rod is controlled through a pull rod adjusting body; and arranging the pile pulling machine on the platform support plate, connecting a hoisting cable of the pile pulling machine with a rod top hoisting ring at the top end of the hoisting connecting rod, and pulling out the steel pipe pile.
Preferably, the method comprises the following steps: step 2) the guard net stirrups are made of steel bars or steel sheets or steel wire ropes and are arranged along the cross section direction of the bridge deck beam, and two ends of the guard net stirrups are in anchoring connection or welding connection with the bridge deck connecting plate on the inner side of the bridge deck guardrail; the light base plate is made of foam plates or PVC plates and is connected with the flexible protective net in a sticking mode or in a rivet connection mode; the flexible protective net is a nylon rope net or a wire net.
Preferably, the method comprises the following steps: step 3), the connecting groove pipes are welded with the first supporting hoop, and the two opposite connecting groove pipes are arranged in a mirror symmetry mode along the axis of the first supporting hoop; the sliding adjusting bolts are welded with the first supporting hoop, and the two opposite sliding adjusting bolts are arranged along the axis of the first supporting hoop in a mirror symmetry manner; the sliding connector comprises a limiting groove plate, a groove bottom ball and a rotating baffle plate, the limiting groove plate is formed by rolling a steel plate, a vertical plate of the limiting groove plate and a bottom plate jointly enclose to form a steel beam sliding groove, and a connecting transverse plate and a limiting hanging plate are symmetrically arranged on the outer side wall of the limiting groove plate; the cross section of the rotary baffle is L-shaped, one end of the rotary baffle is connected with the connecting transverse plate through a baffle rotating shaft, and the other end of the rotary baffle is connected with the limiting hanging plate through a connecting hanging ring; the limiting hanging plate is made of a steel wire rope or a steel plate; the cross section of the connecting hanging ring is in a circular ring shape and is formed by rolling steel bars; the groove bottom ball adopts a steel ball and is arranged between ball baffles on the bottom plate of the steel beam sliding groove.
Preferably, the method comprises the following steps: in the step 5), two rotating top support plates connected with the fixed sling and the second sling are respectively fixed on the upper surface of the bridge surface beam, and the connecting line of the two rotating top support plates, the fixed sling and the connecting end of the second sling is parallel to the cross section direction of the bridge surface beam; the first suspension hoop, the second suspension hoop and the third suspension hoop are the same as the beam moving hoop on the longitudinal steel beam in shape and size.
Preferably, the method comprises the following steps: the beam moving hoop in the steps 4) and 5) consists of two hoop hoops with the same shape, the cross section of the beam moving hoop connected with the transverse steel beam is matched with that of the transverse steel beam, and the cross section of the beam moving hoop connected with the longitudinal steel beam is matched with that of the longitudinal steel beam; a hoop fastening bolt is arranged at the joint of the two hoop plates of the hoop, and a sliding pull ring is arranged on the outer side wall of the hoop plate of the hoop.
Preferably, the method comprises the following steps: step 6) the pile cutting support body comprises a pile cutting lower support rod and a pile cutting upper support rod, and a support adjusting bolt is arranged between the pile cutting lower support rod and the pile cutting upper support rod to respectively enable the pile cutting lower support rod and the pile cutting upper support rod to be connected with the pile cutting support plate and the second pile cutting anchor ear in a welding mode; the protecting net sliding groove is formed by rolling a steel plate, the cross section of the protecting net sliding groove is U-shaped, and the protecting net sliding groove is annularly distributed along the upper surface of the pile cutting supporting plate; the screw fastening directions of the lower support rod of the pile cutting and the upper support rod of the pile cutting at the two ends of the supporting and adjusting bolt are opposite.
Preferably, the method comprises the following steps: step 7), the pile end connector comprises a hoisting balance plate, a top transverse plate, an arc outer plate, an arc inner plate, an adjustable clamping plate and a built-in adjusting bolt; the upper surface of the hoisting balance plate is provided with a hoisting connecting rod, a connecting vertical rod is arranged between the lower surface of the hoisting balance plate and the top transverse plate, and the top end of the hoisting connecting rod is provided with a rod top hanging ring; the arc outer plate is arranged on the lower surface of the transverse plate at the top and is formed by rolling a steel plate, the cross section of the arc outer plate is arc-shaped, the inner diameter of the arc outer plate is the same as the outer diameter of the steel pipe pile, the central angle of the arc outer plate is 60-120 degrees, and an outer plate fastening bolt is arranged on the arc outer plate; the arc inner plate and the adjustable clamping plate are arranged between the opposite arc outer plates, the outer diameter of the arc inner plate is the same as the inner diameter of the steel pipe pile, the central angle is 60-120 degrees, the arc inner plate is vertically welded and connected with the top transverse plate, and the adjustable clamping plate controls the transverse position of the adjustable clamping plate through an internal adjusting bolt; the built-in adjusting bolt is arranged between the arc inner plate and the adjustable clamping plate.
The invention has the beneficial effects that:
(1) the invention can limit the position of the transverse steel beam and the longitudinal steel beam through the sliding connector and reduce the interface friction by means of the groove bottom ball in the sliding connector; meanwhile, the sliding connector can be accurately controlled by the sliding adjusting bolt and the stay bar adjusting bolt, so that the difficulty of space positioning is reduced; in addition, the setting of the first support staple bolt in the outside of steel-pipe pile and second support staple bolt helps promoting the wholeness of structure.
(2) According to the invention, the light base plate and the flexible protecting net are sequentially arranged on the lower surface of the bridge surface beam, so that construction protection can be provided for the bridge surface beam, and the safety of a construction structure is improved.
(3) The invention can complete the swivel construction of the longitudinal steel beam by the retractable combination of the second sling and the first sling, thereby reducing the dismantling construction difficulty of the longitudinal steel beam.
(4) The invention can support the steel pipe pile by the pile cutting support body between the first pile cutting hoop and the second pile cutting hoop, can reduce the shaking of the steel pipe pile during pile cutting construction, and can synchronously control the deformation of the steel pipe pile at the cut part.
(5) According to the invention, the first pile pulling hoop is arranged on the steel pipe pile to be pulled out, and the pile end connector is arranged at the top end of the steel pipe pile, so that the stress of the steel pipe pile during pulling out construction can be improved, and the pile pulling construction difficulty of the steel pipe pile is reduced; meanwhile, the second pile pulling hoop and the third pile pulling hoop are arranged on the adjacent steel pipe pile, the pressure bearing cap plate is arranged at the top end of the steel pipe pile, and the reinforcing pull rod is arranged between the platform support plate and the third pile pulling hoop, so that the local stress of the pile end of the steel pipe pile can be reduced, and the stability of the pile pulling construction platform can be improved.
Drawings
FIG. 1 is a construction flow chart of a cast-in-place bridge steel pipe pile underwater bracket dismantling system;
FIG. 2 is a cross-sectional view of a transverse steel beam dismantling construction;
FIG. 3 is a longitudinal section view of a transverse steel beam dismantling construction structure;
FIG. 4 is a schematic longitudinal section view of a longitudinal steel beam dismantling construction structure;
FIG. 5 is a schematic view of the slip connector structure of FIGS. 2-4;
FIG. 6 is a schematic view of the collar structure of the walking beam of FIGS. 2-4;
FIG. 7 is a front elevation view of a longitudinal steel beam hoisting swivel;
FIG. 8 is a top view of the longitudinal steel beam hoisting swivel of FIG. 7;
FIG. 9 is a schematic diagram of a construction structure for cutting a steel pipe pile;
FIG. 10 is a schematic view of a construction structure for removing a steel pipe pile;
fig. 11 is a schematic view of the pile end connector structure of fig. 10.
Description of reference numerals: 1-steel pipe pile; 2-a bridge deck beam; 3-light base plate; 4-flexible protecting net; 5-protecting the net stirrup; 6-a first supporting hoop; 7-a second supporting hoop; 8-connecting the grooved tube; 9-a slippage adjusting bolt; 10-hoop side plates; 11-bracing a bracing plate; 12-a vertical strut; 13-a slip connector; 14-a strut adjusting bolt; 15-adjusting the connecting rod; 16-built-in adjusting bolt; 17-a slide baffle; 18-hanging plate sliding chutes; 19-safe hanging plate; 20-hanging the plate connecting beam; 21-a reinforcing brace; 22-a beam shifting collar; 23-transverse steel beams; 24-a first sling; 25-sling tabs; 26-a fixed sling; 27-a second sling; 28-swivel top stay plate; 29-longitudinal steel beams; 30-a first suspension hoop; 31-a third suspension hoop; 32-a second suspension hoop; 33-a first pile cutting hoop; 34-a second pile cutting hoop; 35-pile cutting support body; 36-cutting the supporting plate; 37-protective net chutes; 38-circumferential protective net; 39-chute anchor; 40-a first pile pulling hoop; 41-pile end connectors; 42-hoisting a balance plate; 43-a lifting ring connecting cable; 44-second pile pulling hoop; 45-third pile pulling hoop; 46-a pressure-bearing cap plate; 47-cap plate supporting plate; 48-cap plate retainers; 49-platform beam; 50-a platform support plate; 51-rigid bollard; 52-flexible bollard; 53-an elastic linker; 54-reinforcement tie rods; 55-a pull rod adjustment body; 56-pile pulling machinery; 57-hoisting the inhaul cable; 58-hoisting the connecting rod; 59-pole top hanging ring; 60-bridge deck guardrails; 61-bridge deck connection plates; 62-limiting groove plates; 63-groove bottom ball; 64-rotating the baffle; 65-steel beam runner; 66-connecting the transverse plates; 67-limit hanging plate; 68-a baffle rotation axis; 69-connecting a hanging ring; 70-ball baffles; 71-a ferrule collar plate; 72-ferrule securing pin; 73-sliding pull ring; 74-pile cutting lower support rod; 75-pile cutting upper support rods; 76-support adjustment bolts; 77-top transverse plate; 78-arc outer plate; 79-arc inner plate; 80-adjustable splints; 81-outer plate fastening bolts; 82-connecting a vertical rod; 83-guardrail posts; 84-column foundation; 85-hoop side hanging ring.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Referring to fig. 1, the construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system comprises the following construction steps:
1) construction preparation: rechecking to determine the position of the steel pipe pile 1, and delimiting a material stacking field on the bridge surface beam 2; preparing construction devices and materials required by demolition construction;
2) protecting the bottom of the bridge surface beam: the lower surface of the bridge surface beam 2 is sequentially provided with a light backing plate 3 and a flexible protecting net 4, and the flexible protecting net 4 and the light backing plate 3 are tightly connected with the bridge surface beam 2 through a protecting net stirrup 5;
3) erecting a steel beam dismantling support: sequentially arranging a first supporting hoop 6 and a second supporting hoop 7 on the outer side wall of the steel pipe pile 1 from top to bottom; a connecting groove pipe 8 and a sliding adjusting bolt 9 are arranged on the outer side of the first supporting hoop 6; a hoop side supporting plate 10 is arranged on the outer side of the second supporting hoop 7 along the annular direction, and a supporting plate diagonal support 11 is arranged between the hoop side supporting plate 10 and the second supporting hoop 7; a column foundation 84 and a guardrail column 83 are arranged on the periphery of the hoop side supporting plate 10 at the outermost side along the annular direction; one end of the vertical stay bar 12 is firmly connected with the lower surface of the sliding connector 13, and the other end is connected with a stay bar adjusting bolt 14; one end of an adjusting connecting rod 15 is inserted into the connecting groove pipe 8, the other end of the adjusting connecting rod is connected through a support rod adjusting bolt 14, and a sliding adjusting bolt 9 is connected with a sliding baffle 17 on the adjusting connecting rod 15; hanging plate sliding grooves 18 are respectively laid on adjacent hoop side supporting plates 10, so that hanging plate connecting beams 20 on two side edges of the safety hanging plate 19 are firmly connected with the hanging plate sliding grooves 18 through bolts;
4) removing the transverse steel beam: placing the transverse steel beam 23 to be moved in the steel beam sliding groove 65 of the sliding connecting body 13, connecting the connecting hanging ring 69 with the limiting hanging plate 67, jacking the sliding baffle plate 17 through the sliding adjusting bolt 9 to control the transverse position of the sliding connecting body 13, and controlling the top surface elevation of the sliding connecting body 13 through the stay bar adjusting bolt 14; after the control of the sliding connector 13 is finished, a reinforcing brace 21 is arranged between the adjusting connecting rod 15 and the hoop side brace 10; a beam moving hoop 22 is arranged at the end part of the transverse steel beam 23, and the transverse steel beam 23 is pulled out from the lower part of the bridge surface beam 2 through external pulling equipment;
5) removing the longitudinal steel beam: a sling pull ring 25 connected with a first sling 24 is arranged on the lower surface of the bridge surface beam 2, and a rotating top support plate 28 connected with a fixed sling 26 and a second sling 27 is respectively arranged on the upper surface; after the transverse steel beam 23 is removed, the elevations of the first supporting hoop 6 and the second supporting hoop 7 are adjusted, then the longitudinal steel beam 29 to be moved is placed in the steel beam chute 65 of the sliding connecting body 13, the connecting hanging ring 69 is connected with the limiting hanging plate 67, the transverse position of the sliding connecting body 13 is controlled by jacking the sliding baffle 17 through the sliding adjusting bolt 9, and the elevation of the top surface of the sliding connecting body 13 is controlled by the supporting rod adjusting bolt 14; after the control of the sliding connector 13 is finished, a reinforcing brace 21 is arranged between the adjusting connecting rod 15 and the hoop side brace 10; a beam moving hoop 22 is arranged at the end part of the longitudinal steel beam 29, and the longitudinal steel beam 29 is pulled to a set position below the bridge surface beam 2 through external pulling equipment; arranging a first suspension loop 30 and a third suspension loop 31 at two ends of the longitudinal steel beam 29 respectively, and enabling a second suspension loop 32 to be adjacent to the first suspension loop 30; connecting the first sling 24, the second sling 27 and the fixed sling 26 to a first hoop 30, a second hoop 32 and a third hoop 31, respectively; after the longitudinal steel beam 29 is lifted by the first sling 24 and the fixed sling 26, synchronously tensioning the second sling 27 and extending the first sling 24 to enable the longitudinal steel beam 29 to rotate to the direction vertical to the longitudinal center line of the bridge surface beam 2 under the action of transverse tension, and then dragging the longitudinal steel beam 29 out from the lower part of the bridge surface beam 2 by external dragging equipment;
6) cutting off the steel pipe pile: a first pile cutting hoop 33 and a second pile cutting hoop 34 are respectively arranged below and above a to-be-cut section of the steel pipe pile 1, and a pile cutting support body 35 is arranged between the first pile cutting hoop 33 and the second pile cutting hoop 34; a protecting net chute 37 and a circumferential protecting net 38 are sequentially arranged on the pile cutting supporting plate 36, and the protecting net chute 37 is connected with the circumferential protecting net 38 through a chute anchor 39;
7) removing the steel pipe pile: arranging a first pile pulling hoop 40 on a steel pipe pile 1 to be pulled out, arranging a pile end connector 41 at the top end of the steel pipe pile 1, and arranging a lifting ring connecting cable 43 between a lifting balance plate 42 of the pile end connector 41 and a hoop side lifting ring 85 on the outer side wall of the first pile pulling hoop 40; arranging a second pile pulling hoop 44 and a third pile pulling hoop 45 on the adjacent steel pipe pile 1, and arranging a pressure-bearing cap plate 46 at the top end of the steel pipe pile 1; a cap plate aligning body 48 is arranged between the pressure-bearing cap plate 46 and a cap plate supporting plate 47 at the outer side of the second pile pulling anchor ear 44; firstly, the flatness of the top surface of the pressure-bearing cap plate 46 is adjusted through the cap plate aligning body 48, and then the platform cross beam 49 and the platform support plate 50 are sequentially placed on the pressure-bearing cap plate 46; a rigid guard post 51 and a flexible guard post 52 are arranged on the periphery of the platform support plate 50 from inside to outside, and an elastic connecting body 53 is arranged between the rigid guard post 51 and the flexible guard post 52; a reinforcing pull rod 54 is arranged between the platform support plate 50 and the third pile pulling hoop 45, and the tensile strength of the reinforcing pull rod 54 is controlled through a pull rod adjusting body 55; the pile pulling machine 56 is arranged on the platform support plate 50, a hoisting cable 57 of the pile pulling machine 56 is connected with a rod top hoisting ring 59 at the top end of a hoisting connecting rod 58, and the steel pipe pile 1 is pulled out.
Referring to fig. 2 to 11, in the cast-in-place bridge steel pipe pile underwater support dismantling system, a transverse steel beam 23 and a longitudinal steel bar 29 are limited through a sliding connector 13, and the sliding connector 13 is accurately controlled through a sliding adjusting bolt 9 and a strut adjusting bolt 14; the lower surface of the bridge surface beam 2 is sequentially provided with a light base plate 3 and a flexible protecting net 4; the second sling 27 and the first sling 24 are combined in a retractable manner, so that the swivel construction of the longitudinal steel beam 29 is completed; the steel pipe pile 1 can be supported by a pile cutting support body 35 between the first pile cutting hoop 33 and the second pile cutting hoop 34; a first pile pulling hoop 40 is arranged on a steel pipe pile 1 to be pulled out, a second pile pulling hoop 44 and a third pile pulling hoop 45 are arranged on the adjacent steel pipe pile 1, a pressure bearing cap plate 46 is arranged at the top end of the steel pipe pile 1, and a reinforcing pull rod 54 is arranged between a platform support plate 50 and the third pile pulling hoop 45.
The steel pipe pile 1 adopts a steel pipe with the diameter of 600 multiplied by 10 mm.
The bridge deck beam 2 is a reinforced concrete box girder bridge having a strength grade of C50.
The light base plate 3 is formed by cutting a foam plate material with the thickness of 10cm and is connected with the bridge surface beam 2 in a sticking way.
The flexible protective net 4 adopts a steel wire mesh sheet.
The guard net stirrups 5 are formed by rolling steel plates with the thickness of 1mm and the width of 20cm and are connected with the bridge deck beam 2 through a bridge deck connecting plate 61; the bridge deck connecting plate 61 is made of a steel plate with the thickness of 2cm and is connected with the bridge deck beam 2 through an anchor.
The first supporting hoop 6 and the second supporting hoop 7 are composed of two hoop arc plates, the thickness of each hoop plate is 10mm, and the inner diameter of each hoop plate is 600 mm.
The connecting groove pipe 8 is vertically welded with the first supporting hoop 6 and is rolled by a steel pipe with the inner diameter of 100mm and the wall thickness of 10 mm.
The sliding adjusting bolt 9 is a high-strength bolt with the diameter of 60 mm.
The hoop side plate 10 is cut from a steel plate having a thickness of 3 mm.
The bracing plate 11 is made of twisted steel with the diameter of 30 mm.
The vertical stay bar 12 is made of a steel pipe with the diameter of 100mm and the wall thickness of 2 mm.
The sliding connector 13 comprises a limit groove plate 62, a groove bottom ball 63 and a rotary baffle plate 64.
The limiting groove plate 62 is formed by rolling a steel plate with the thickness of 10mm, a vertical plate of the limiting groove plate 62 and a bottom plate jointly enclose and close to form a steel beam sliding groove 65, and the depth of the steel beam sliding groove 65 is 20 cm. The ball 63 at the bottom of the groove is made of steel balls with the diameter of 10 mm. The cross section of the rotary baffle plate 64 is L-shaped, the rotary baffle plate is formed by rolling a steel plate material with the thickness of 10mm, and the rotary baffle plate is connected with a connecting transverse plate 66 and a limiting hanging plate 67 on the outer side wall of the limiting groove plate 62 through a baffle plate rotating shaft 68 and a connecting hanging ring 69 respectively.
The connecting transverse plate 66 is formed by rolling a steel plate with the thickness of 10mm and is connected with the limiting groove plate 62 in a welding mode.
The limiting hanging plate 67 is formed by rolling a steel pipe with the diameter of 60mm and is connected with the limiting groove plate 62 in a welding mode.
The baffle rotating shaft 68 is a stainless steel rotating shaft with a diameter of 10 mm.
The cross section of the connecting hanging ring 69 is in a circular ring shape and is formed by rolling a steel bar with the diameter of 10mm, and the diameter of the connecting hanging ring is 80 mm.
The ball baffle 70 is formed by cutting a steel plate with the thickness of 2mm and is connected with the bottom plate of the limiting groove plate 62 in a welding mode.
The stay bar adjusting bolt 14 is a high-strength bolt with an inner diameter of 100 mm.
The adjusting connecting rod 15 is made of a steel pipe with the diameter of 100mm and the wall thickness of 2 mm.
The sliding baffle 17 is made of a steel plate with the thickness of 10mm, the width of the sliding baffle is 10cm, and the sliding baffle is vertically welded and connected with the adjusting connecting rod 15.
The hanging plate sliding groove 18 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the hanging plate sliding groove is U-shaped, the hanging plate sliding groove is connected with the hoop side supporting plate 10 in a welding mode, the groove depth is 10cm, and the width is 1 cm.
The safety hanging plate 19 is made of a steel plate with the thickness of 2 mm.
The hanging plate connecting beam 20 is L-shaped in cross section, one side edge is welded with the safety hanging plate 19, and the other side edge is embedded into the hanging plate sliding groove 18 for connection.
The reinforcing support column 21 is a steel pipe with a diameter of 100mm and a wall thickness of 2 mm.
The beam-moving hoop 22 is composed of two hoop hooping plates 71 with the same shape, and the cross section of the hoop hooping plates is the same as the outer contour of the longitudinal steel beam 29. The ferrule collar plate 71 is made of a steel plate having a thickness of 10 mm.
The ferrule fastening pin 72 is a 30mm diameter bolt.
The sliding pull ring 73 is formed by rolling a steel bar with the diameter of 10mm, and the diameter of the sliding pull ring is 100 mm.
The transverse steel beam 23 is made of H-shaped steel with the specification of 300 multiplied by 10 multiplied by 15.
The first sling 24, the fixed sling 26 and the second sling 27 are all wire ropes with a diameter of 20 mm.
The sling pull ring 25 is rolled into a circle by smooth round steel bars with the diameter of 20mm, and the diameter of the sling pull ring is 10 cm.
The rotating body top supporting plate 28 is formed by rolling a steel plate with the thickness of 10 mm.
The longitudinal steel beam 29 is made of H-shaped steel with the specification of 400 multiplied by 13 multiplied by 21.
The first, second and third hangers 30, 32, 31 are the same size and shape as the walking beam collar 22.
The first pile cutting hoop 33 and the second pile cutting hoop 34 are composed of two hoop arc plates, the thickness of each hoop plate is 10mm, and the inner diameter of each hoop plate is 600 mm.
The pile cutting support body 35 comprises a pile cutting lower support rod 74 and a pile cutting upper support rod 75, which are both made of steel pipes with the diameter of 60mm, and the outer side walls of the pile cutting support body are provided with threads with opposite fastening directions. The support adjusting bolt 76 is matched with the pile cutting lower supporting rod 74 and the pile cutting upper supporting rod 75.
The pile cutting supporting plate 36 is formed by rolling a steel plate with the thickness of 20mm and is welded and connected with the upper surface of the first pile cutting hoop 33.
The protecting net chute 37 is formed by rolling a steel plate with the thickness of 2mm, the cross section of the protecting net chute is U-shaped, and the depth of the protecting net chute is 10 cm.
The annular protecting net 38 is made of a steel wire mesh, the bottom end of the annular protecting net is inserted into the protecting net sliding groove 37, and the annular protecting net is fastened through a sliding groove anchor 39. The chute anchor 39 is a stainless steel bolt with a diameter of 20 mm.
First pile pulling staple bolt 40, second pile pulling staple bolt 44 and third pile pulling staple bolt 45 constitute by two staple bolt arc boards, and hoop board thickness is 10mm, and the internal diameter is 600 mm.
The pile end connector 41 comprises a hoisting balance plate 42, a top transverse plate 77, an arc outer plate 78, an arc inner plate 79, an adjustable clamping plate 80 and a built-in adjusting bolt 16. Wherein the hoisting balance plate 42 is cut by a steel plate with the thickness of 20 mm; the built-in adjusting bolt 16 is composed of a screw rod and a bolt with the diameter of 30mm, one end of the built-in adjusting bolt is welded with the arc-shaped inner plate 79, and the other end of the built-in adjusting bolt is welded with the adjustable clamping plate 80; the arc-shaped inner plate 79 and the adjustable clamping plate 80 are formed by rolling steel plates with the thickness of 10mm, the cross sections of the arc-shaped inner plate and the adjustable clamping plate are arc-shaped, the outer diameter of the arc-shaped inner plate is the same as the inner diameter of the steel pipe pile 1, and the central angle of the arc-shaped inner plate and the adjustable clamping plate is 60; the arc-shaped outer plate 78 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the arc-shaped outer plate is arc-shaped, the inner diameter of the arc-shaped outer plate is the same as the outer diameter of the steel pipe pile 1, and the central angle of the arc-shaped outer plate is 60 degrees; the top transverse plate 77 is formed by rolling a steel plate with the thickness of 10mm, and the lower surface of the top transverse plate is vertically welded with the arc outer plate 78 and the arc inner plate 79; an outer plate fastening bolt 81 is arranged on the side wall of the arc-shaped outer plate 78; the outer plate fastening bolts 81 are stainless bolts having a diameter of 30 mm.
The hoisting ring connecting cable 43 is a steel wire rope with the diameter of 30 mm.
The pressure-bearing cap plate 46 and the cap plate supporting plate 47 are both formed by rolling steel plates with the thickness of 10 mm. Wherein the lower surface of the pressure-bearing cap plate 46 is provided with an embedded groove of the steel pipe pile 1; the cap plate supporting plate 47 is connected with the second pile pulling hoop 44 in a welding mode.
The cap plate aligning body 48 is formed by combining a screw rod and a bolt, the diameter of which is 30mm and the length of which can be adjusted, and the bottom end of the cap plate aligning body is vertically welded and connected with the cap plate supporting plate 47.
The platform beam 49 is made of H-shaped steel having a specification of 300 × 300 × 10 × 15.
The platform plate 50 is made of a steel plate with a thickness of 10 mm.
The rigid bollard 51 is made of a steel pipe material with the diameter of 60mm through rolling.
The flexible bollard 52 is made of a plastic pipe with the diameter of 60 mm.
The elastic connecting body 53 is a rubber strip with the thickness of 20mm, and two sides of the elastic connecting body are stuck and connected with the rigid protective column 51 and the flexible protective column 52.
The reinforcing pull rod 54 adopts a screw rod with the diameter of 20 mm. The tie rod adjusting body 55 is matched with the reinforcing tie rod 54, and the fastening directions of the reinforcing tie rods 54 on the two sides of the tie rod adjusting body 55 are opposite.
Pile pulling machine 56 employs a 16t crawler crane.
The hoisting inhaul cable 57 is made of a steel wire rope with the diameter of 65 mm.
The hoisting connecting rod 58 is made of steel pipe material with the diameter of 100mm and the wall thickness of 6 mm.
The rod top hanging ring 59 is formed by rolling a steel bar with the diameter of 32mm, and the diameter of the rod top hanging ring is 20 cm.
The connecting vertical rod 82 is made of a steel pipe material with the diameter of 60mm and the wall thickness of 6 mm.
The bridge floor guardrail 60 is a reinforced concrete guardrail.
The guardrail posts 83 are made of steel pipe materials with the diameter of 60mm through rolling.
The column base 84 is rolled by a steel plate with the thickness of 2mm, the cross section of the column base is U-shaped, and a slotted hole connected with the guardrail column 83 is arranged on the column base.
Hoop side rings 85 are rolled by using a steel bar material with the diameter of 10mm, the diameter of 100mm, and the hoop side rings are arranged on the outer side wall of the first pile pulling hoop 40.
Claims (7)
1. The construction method of the cast-in-place bridge steel pipe pile underwater support dismantling system is characterized by comprising the following steps of: the method comprises the following construction steps:
1) construction preparation: rechecking to determine the position of the steel pipe pile (1), and delimiting a material stacking field on the bridge surface beam (2); preparing construction devices and materials required by demolition construction;
2) protecting the bottom of the bridge surface beam: the lower surface of the bridge surface beam (2) is sequentially provided with a light base plate (3) and a flexible protecting net (4), and the flexible protecting net (4) and the light base plate (3) are tightly connected with the bridge surface beam (2) through a protecting net stirrup (5);
3) erecting a steel beam dismantling support: sequentially arranging a first supporting hoop (6) and a second supporting hoop (7) on the outer side wall of the steel pipe pile (1) from top to bottom; a connecting groove pipe (8) and a sliding adjusting bolt (9) are arranged on the outer side of the first supporting hoop (6); a hoop side support plate (10) is arranged on the outer side of the second support hoop (7) along the annular direction, and a support plate diagonal support (11) is arranged between the hoop side support plate (10) and the second support hoop (7); a column foundation (84) and a guardrail column (83) are arranged on the periphery of the hoop side supporting plate (10) at the outermost side along the annular direction; one end of a vertical stay bar (12) is firmly connected with the lower surface of the sliding connector (13), and the other end of the vertical stay bar is connected with a stay bar adjusting bolt (14); one end of an adjusting connecting rod (15) is inserted into the connecting groove pipe (8), the other end of the adjusting connecting rod is connected with a strut adjusting bolt (14), and a sliding adjusting bolt (9) is connected with a sliding baffle (17) on the adjusting connecting rod (15); hanging plate sliding grooves (18) are respectively laid on adjacent hoop side supporting plates (10), so that hanging plate connecting beams (20) on two side edges of the safety hanging plate (19) are connected with the hanging plate sliding grooves (18) through bolts;
4) removing the transverse steel beam: placing a transverse steel beam (23) to be moved in a steel beam sliding groove (65) of the sliding connecting body (13), connecting a connecting hanging ring (69) with a limiting hanging plate (67), jacking a sliding baffle plate (17) through a sliding adjusting bolt (9) to control the transverse position of the sliding connecting body (13), and controlling the top surface elevation of the sliding connecting body (13) through a strut adjusting bolt (14); after the position control of the sliding connector (13) is finished, a reinforcing support column (21) is arranged between the adjusting connecting rod (15) and the hoop side support plate (10); a beam moving hoop (22) is arranged at the end part of the transverse steel beam (23), and the transverse steel beam (23) is pulled out from the lower part of the bridge surface beam (2) through external pulling equipment;
5) removing the longitudinal steel beam: a sling pull ring (25) connected with a first sling (24) is arranged on the lower surface of the bridge surface beam (2), and a rotating body top support plate (28) connected with a fixed sling (26) and a second sling (27) is respectively arranged on the upper surface of the bridge surface beam (2); after the transverse steel beam (23) is dismantled, the elevations of the first supporting hoop (6) and the second supporting hoop (7) are adjusted, then the longitudinal steel beam (29) to be moved is placed in a steel beam sliding groove (65) of the sliding connecting body (13), the connecting hanging ring (69) is connected with the limiting hanging plate (67), the sliding adjusting bolt (9) is used for jacking the sliding baffle (17) to control the transverse position of the sliding connecting body (13), and the supporting rod adjusting bolt (14) is used for controlling the elevation of the top surface of the sliding connecting body (13); after the position control of the sliding connector (13) is finished, a reinforcing support column (21) is arranged between the adjusting connecting rod (15) and the hoop side support plate (10); a beam moving hoop (22) is arranged at the end part of the longitudinal steel beam (29), and the longitudinal steel beam (29) is pulled to a set position below the bridge surface beam (2) through external pulling equipment; arranging a first suspension hoop (30) and a third suspension hoop (31) at two ends of the longitudinal steel beam (29) respectively, and arranging a second suspension hoop (32) on the longitudinal steel beam (29) adjacent to the first suspension hoop (30); connecting a first sling (24), a second sling (27) and a fixed sling (26) to a first sling (30), a second sling (32) and a third sling (31), respectively; after the longitudinal steel beam (29) is lifted up through the first sling (24) and the fixed sling (26), the second sling (27) is synchronously tensioned, the first sling (24) is extended, the longitudinal steel beam (29) rotates to the direction vertical to the longitudinal center line of the bridge surface beam (2) under the action of transverse tension, and then the longitudinal steel beam (29) is pulled out from the lower part of the bridge surface beam (2) through external pulling equipment;
6) cutting off the steel pipe pile: a first pile cutting hoop (33) and a second pile cutting hoop (34) are respectively arranged below and above a to-be-cut section of the steel pipe pile (1), and a pile cutting support body (35) is arranged between the first pile cutting hoop (33) and the second pile cutting hoop (34); a pile cutting support plate (36) is arranged on the outer side of the first pile cutting anchor ear (33), a protective net chute (37) and a circumferential protective net (38) are sequentially arranged on the pile cutting support plate (36), and the protective net chute (37) is connected with the circumferential protective net (38) through a chute anchor (39);
7) removing the steel pipe pile: arranging a first pile pulling hoop (40) on a steel pipe pile (1) to be pulled out, arranging a pile end connector (41) at the top end of the steel pipe pile (1), and arranging a lifting ring connecting cable (43) between a lifting balance plate (42) of the pile end connector (41) and a ring side lifting ring (85) on the outer side wall of the first pile pulling hoop (40); arranging a second pile pulling hoop (44) and a third pile pulling hoop (45) on the adjacent steel pipe pile (1), and arranging a pressure-bearing cap plate (46) at the top end of the steel pipe pile (1); a cap plate aligning body (48) is arranged between the pressure-bearing cap plate (46) and a cap plate supporting plate (47) at the outer side of the second pile pulling hoop (44); firstly, the flatness of the top surface of a pressure-bearing cap plate (46) is adjusted through a cap plate corrector (48), and then a platform beam (49) and a platform support plate (50) are sequentially placed on the pressure-bearing cap plate (46); a rigid guard post (51) and a flexible guard post (52) are arranged on the periphery of the platform support plate (50) from inside to outside, and an elastic connecting body (53) is arranged between the rigid guard post (51) and the flexible guard post (52); a reinforcing pull rod (54) is arranged between the platform support plate (50) and the third pile pulling hoop (45), and the tension strength of the reinforcing pull rod (54) is controlled through a pull rod adjusting body (55); the pile pulling machine (56) is arranged on the platform support plate (50), a hoisting cable (57) of the pile pulling machine (56) is connected with a rod top hoisting ring (59) at the top end of a hoisting connecting rod (58), and the steel pipe pile (1) is pulled out.
2. The construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system according to claim 1, characterized by comprising the following steps: step 2), the net protecting stirrups (5) are made of steel bars or steel sheets or steel wire ropes and are arranged along the cross section direction of the bridge deck beam (2), and two ends of the net protecting stirrups are in anchoring connection or welding connection with a bridge deck connecting plate (61) on the inner side of a bridge deck guardrail (60); the light backing plate (3) is a foam plate or a PVC plate and is connected with the flexible protective net (4) in a sticking way or through an anchor nail; the flexible protective net (4) is made of nylon rope net or iron wire net.
3. The construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system according to claim 1, characterized by comprising the following steps: step 3), welding the connecting slot pipes (8) with the first supporting anchor ear (6), wherein the two opposite connecting slot pipes (8) are arranged in a mirror symmetry mode along the axis of the first supporting anchor ear (6); the sliding adjusting bolts (9) are welded with the first supporting hoop (6), and the two opposite sliding adjusting bolts (9) are arranged in a mirror symmetry mode along the axis of the first supporting hoop (6); the sliding connector (13) comprises a limiting groove plate (62), a groove bottom ball (63) and a rotating baffle (64), the limiting groove plate (62) is formed by rolling a steel plate, a vertical plate of the limiting groove plate (62) and a bottom plate jointly enclose to form a steel beam sliding groove (65), and a connecting transverse plate (66) and a limiting hanging plate (67) are symmetrically arranged on the outer side wall of the limiting groove plate (62); the cross section of the rotary baffle plate (64) is L-shaped, one end of the rotary baffle plate is connected with a connecting transverse plate (66) through a baffle plate rotating shaft (68), and the other end of the rotary baffle plate is connected with a limiting hanging plate (67) through a connecting hanging ring (69); the limiting hanging plate (67) adopts a steel wire rope or a steel plate; the cross section of the connecting hanging ring (69) is circular and is formed by rolling steel bars; the groove bottom balls (63) are steel balls and are arranged between ball baffles (70) on a bottom plate of the steel beam sliding groove (65).
4. The construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system according to claim 1, characterized by comprising the following steps: in the step 5), two rotating top support plates (28) connected with the fixed sling (26) and the second sling (27) are respectively fixed on the upper surface of the bridge surface beam (2), and the connecting line of the two rotating top support plates (28) and the connecting ends of the fixed sling (26) and the second sling (27) is parallel to the cross section direction of the bridge surface beam (2); the first suspension hoop (30), the second suspension hoop (32) and the third suspension hoop (31) are the same in shape and size as the beam moving hoop (22) on the longitudinal steel beam (29).
5. The construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system according to claim 1, characterized by comprising the following steps: step 4) and step 5), the beam moving hoop (22) consists of two hoop plates (71) with the same shape, the cross section shape of the beam moving hoop (22) connected with the transverse steel beam (23) is matched with that of the transverse steel beam (23), and the cross section shape of the beam moving hoop (22) connected with the longitudinal steel beam (29) is matched with that of the longitudinal steel beam (29); a hoop fastening bolt (72) is arranged at the joint of the two hoop plates (71), and a sliding pull ring (73) is arranged on the outer side wall of the hoop plate (71).
6. The construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system according to claim 1, characterized by comprising the following steps: step 6), the pile cutting support body (35) comprises a pile cutting lower support rod (74) and a pile cutting upper support rod (75), a support adjusting bolt (76) is arranged between the pile cutting lower support rod (74) and the pile cutting upper support rod (75), and the pile cutting lower support rod (74) and the pile cutting upper support rod (75) are respectively connected with the pile cutting support plate (36) and the second pile cutting hoop (34) in a welding mode; the protecting net sliding groove (37) is formed by rolling a steel plate, the cross section of the protecting net sliding groove is U-shaped, and the protecting net sliding groove is annularly distributed along the upper surface of the pile cutting supporting plate (36); the screw fastening directions of the pile cutting lower stay bar (74) and the pile cutting upper stay bar (75) at the two ends of the supporting and adjusting bolt (76) are opposite.
7. The construction method of the cast-in-place bridge steel pipe pile underwater bracket dismantling system according to claim 1, characterized by comprising the following steps: step 7), the pile end connecting body (41) comprises a hoisting balance plate (42), a top transverse plate (77), an arc outer plate (78), an arc inner plate (79), an adjustable clamping plate (80) and a built-in adjusting bolt (16); the upper surface of the hoisting balance plate (42) is provided with a hoisting connecting rod (58), a connecting vertical rod (82) is arranged between the lower surface of the hoisting balance plate (42) and the top transverse plate (77), and the top end of the hoisting connecting rod (58) is provided with a rod top hanging ring (59); the arc outer plate (78) is arranged on the lower surface of the top transverse plate (77) and is formed by rolling a steel plate, the cross section of the arc outer plate is arc-shaped, the inner diameter of the arc outer plate is the same as the outer diameter of the steel pipe pile (1), the central angle of the arc outer plate is 60-120 degrees, and an outer plate fastening bolt (81) is arranged on the arc outer plate; the adjustable steel pipe pile comprises an arc inner plate (79) and an adjustable clamping plate (80), wherein the arc inner plate (79) and the adjustable clamping plate (80) are arranged between opposite arc outer plates (78), the outer diameter of the arc inner plate (79) is the same as the inner diameter of the steel pipe pile (1), the central angle is 60-120 degrees, the arc inner plate (79) is vertically welded and connected with a top transverse plate (77), and the adjustable clamping plate (80) controls the transverse position of the adjustable clamping plate through a built-in adjusting bolt (16); the built-in adjusting bolt (16) is arranged between the arc inner plate (79) and the adjustable clamping plate (80).
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| CN201911053858.3A CN110886219B (en) | 2019-10-31 | 2019-10-31 | Construction method of in-water support dismantling system for cast-in-place bridge steel pipe pile |
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| CN201911053858.3A CN110886219B (en) | 2019-10-31 | 2019-10-31 | Construction method of in-water support dismantling system for cast-in-place bridge steel pipe pile |
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