CN110172965B

CN110172965B - Sectional construction device and construction method for underground continuous wall reinforcing steel bars

Info

Publication number: CN110172965B
Application number: CN201910480299.8A
Authority: CN
Inventors: 黄�俊; 张军; 陈耀钢; 姜雪岐
Original assignee: JIANGSU ZHONGNAN CONSTRUCTION INDUSTRY GROUP CO LTD
Current assignee: JIANGSU ZHONGNAN CONSTRUCTION INDUSTRY GROUP CO LTD
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2021-08-10
Anticipated expiration: 2039-06-04
Also published as: CN110172965A

Abstract

The invention discloses a sectional construction device for a reinforcement of an underground diaphragm wall, which comprises a diaphragm wall groove positioned under the ground, wherein a steel plate and a concrete terrace are sequentially laid at the flat position of an upper opening of the diaphragm wall groove from top to bottom, and the steel plate is fixedly connected with a profile steel cross beam through two profile steel columns; the two section steel columns are respectively arranged at two end parts of the section steel beam; the middle part of the profile steel beam is sequentially connected with a winch, a steel wire rope and a bearing frame from top to bottom; one end of each winch is fixedly connected with the profile steel cross beam, and the other end of each winch is fixedly connected with the bearing frame through a steel wire rope; the profile steel cross beam is also provided with a plurality of profile steel longitudinal beams, and the tops of the plurality of profile steel longitudinal beams are provided with platforms; a plurality of main reinforcements are fixedly connected to the bearing frame, horizontal reinforcements are sequentially arranged on the main reinforcements at equal intervals, and the horizontal reinforcements are bound and fall down. The invention also discloses a construction method, which has less prefabricated land occupation and is safe, and solves the problems of the phenomenon that the framework moves to touch the wall, the phenomena of no removal, exposed ribs, hole collapse and soil clamping of the continuous wall due to the fact that the framework touches the wall.

Description

Sectional construction device and construction method for underground continuous wall reinforcing steel bars

Technical Field

The invention relates to a sectional type construction device and a construction method, in particular to a sectional type construction device and a construction method for underground continuous wall reinforcing steel bars, and belongs to the technical field of building construction.

Background

The continuous wall steel bar construction device and the construction method in the prior art generally adopt a prefabrication mode, need a larger prefabricated binding steel bar framework field, and build a large-area frame binding platform. Therefore, the tall and big steel reinforcement framework is easy to deform during hoisting and depends on tall and big hoisting machinery; the problems of high difficulty in inserting into the wall slot, easy touch of the slot wall and easy exposure of ribs exist.

Disclosure of Invention

The invention aims to overcome the defects that a prefabricated continuous wall steel bar construction device in the prior art is easy to deform in hoisting, depends on hoisting machinery, is difficult to insert into a wall groove, is easy to touch the wall of the wall and is easy to expose steel bars, and provides a sectional type construction device for underground continuous wall steel bars, which has the following technical scheme:

the underground continuous wall steel bar sectional type construction device comprises a continuous wall groove positioned underground, wherein a steel plate and a concrete terrace are sequentially laid at the position of an upper opening flat position of the continuous wall groove from top to bottom, and the steel plate is fixedly connected with a profile steel cross beam through two profile steel columns; the two section steel columns are respectively arranged at two end parts of the section steel beam;

the middle part of the profile steel beam is sequentially connected with a winch, a steel wire rope and a bearing frame from top to bottom; one end of each winch is fixedly connected with the profile steel cross beam, and the other end of each winch is fixedly connected with the bearing frame through a steel wire rope;

the profile steel cross beam is also provided with a plurality of profile steel longitudinal beams, and the tops of the plurality of profile steel longitudinal beams are provided with platforms;

a plurality of main reinforcements are fixedly connected to the bearing frame, horizontal reinforcements are sequentially arranged on the main reinforcements at equal intervals, and the horizontal reinforcements are bound and fall down.

Further, the section of the continuous wall groove is polygonal or linear.

Preferably, a plurality of profile steel longitudinal beams are symmetrically arranged on the profile steel cross beam.

Preferably, the hoist is an automatic linkage motor hoist.

Further, the steel plate is welded on the concrete floor.

Preferably, a limit ring is arranged below the force bearing frame.

Further, install on the shaped steel crossbeam and hang the basket, it has two to hang the basket respectively and locates the both sides of shaped steel crossbeam, hangs the basket and includes the jib, hangs basket platform and railing, hangs the basket platform and passes through jib and shaped steel crossbeam fixed connection, the equidistant installation on the jib of railing.

A construction method utilizing the underground continuous wall steel bar sectional type construction device comprises the following steps:

step 1: digging a continuous wall groove underground, and erecting a bearing frame on the continuous wall groove; on the bearing frame, welding a straight thread sleeve at the corresponding position of the main rib and the bearing frame;

step 2: hanging a hanging basket and a steel bar binding hanging basket inner platform on the profile steel frame, vertically placing main bars downwards one by one through the hanging basket platform, and fixing the hanging basket and the steel bar binding hanging basket inner platform on a bearing frame through a straight thread sleeve 15;

and step 3: hanging the bearing frame on the profile steel beam through a winch and a steel wire rope;

and 4, step 4: starting a winch to adjust the bearing frame to the position where the upper opening of the continuous wall groove is flat;

and 5: a part of constructors vertically put down the main reinforcement downwards one by one through the platform, and fix the main reinforcement on the bearing frame through the straight thread casing 15;

the other part of constructors stand in the hanging basket platform to bind horizontal steel bars, tie bars and a horizontal structure connector;

step 6: the continuous wall steel reinforcement framework is placed down once after one section of continuous wall steel reinforcement framework is bound;

binding the last section of continuous wall steel reinforcement framework, lowering the last section of continuous wall steel reinforcement framework, pulling off the rope releasing pin of the steel wire rope at the bearing frame, and drawing out the steel wire rope;

and 7: and (5) pouring the concrete of the continuous wall.

Preferably, a drawpin rope is connected on the rope releasing pin in the construction method, and the steel wire rope is extracted by pulling the drawpin rope to separate the rope releasing pin from the steel wire rope and the force bearing frame.

Compared with the prior art, the invention has the following beneficial effects:

the prefabricated land occupation is small, the requirements on the lifting capacity, the height and the working radius of a hoisting machine are low, the operation is safe, the binding operation of workers in a hanging basket platform is centralized and does not change, the vertical hanging type binding steel bar framework is not deformed, the vertical position is easy to control, the phenomenon that the framework moves and collides the wall is avoided, the phenomena that the framework cannot fall off, the steel bars are exposed, the holes collapse and the like under the condition that the framework collides the wall are avoided, and the phenomenon that the continuous wall clamps soil is avoided.

Drawings

FIG. 1 is a structural view of a construction apparatus of the present invention;

FIG. 2 is a schematic sectional view of a polygonal continuous wall groove in example 1;

fig. 3 is a detail view of the outrigger of fig. 1;

fig. 4 is a schematic illustration of the outrigger wire rope attachment of fig. 1;

FIG. 5 is a detail view of the rope untying pin of FIG. 4;

FIG. 6 is a detailed view of the platform in embodiment 1;

fig. 7 is a wall armature bracket of the outrigger of fig. 1;

in the figure: 1. the steel structure comprises main reinforcements, 2. a platform, 3. a section steel cross beam, 4. a section steel longitudinal beam, 5. a section steel column, 6. a hanging basket, 601. a hanging rod, 602. a hanging basket platform, 603. a railing, 7. a horizontal steel bar, 8. a rope releasing pin, 801. a through hole, 802. an iron wire, 9. a winch, 10. a steel wire rope, 11. a continuous wall groove, 12. a steel plate, 13. a concrete terrace, 14. a bearing frame, 15. a straight thread sleeve, 16. a limiting ring, 17. a pulling pin rope and 18. a rope.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 6, the sectional construction device for the reinforcement of the underground diaphragm wall comprises a diaphragm wall groove 11 located underground, wherein a steel plate 12 and a concrete terrace 13 are sequentially laid at the position of the flat upper opening of the diaphragm wall groove 11 from top to bottom, and the steel plate 12 is fixedly connected with a section steel beam 3 through two section steel columns 5; the two section steel columns 5 are respectively arranged at two end parts of the section steel beam 3;

the middle part of the section steel beam 3 is sequentially connected with a winch 9, a steel wire rope 10 and a bearing frame 14 from top to bottom; two winches 9 are provided, one end of each winch 9 is fixedly connected with the section steel beam 3, and the other end of each winch 9 is fixedly connected with the bearing frame 14 through a steel wire rope 10;

the profile steel cross beam 3 is also provided with a plurality of profile steel longitudinal beams 4, and the tops of the plurality of profile steel longitudinal beams 4 are provided with platforms 2;

a plurality of main ribs 1 are fixedly connected to the bearing frame 14, horizontal ribs 7 are sequentially arranged on the main ribs 1 at equal intervals, and the horizontal ribs 7 are bound and fall down. Specifically, a straight thread sleeve 15 is welded on the force bearing frame 14, and the main rib 1 is in threaded connection with the force bearing frame 14 through the straight thread sleeve 15.

The cross-section of the continuous wall groove 11 is polygonal or linear.

A plurality of profile steel longerons 4 are located on the profile steel crossbeam 3 symmetrically.

The hoist 9 is an automatic linkage motor hoist 9.

The steel plate 12 is welded on the concrete floor 13. Specifically, the steel plate 12 is a large steel plate.

A limiting ring 16 is arranged below the force bearing frame 14. Specifically, the limiting ring is a phi 10 steel bar limiting ring welded below the bearing frame 14.

Install on shaped steel crossbeam 3 and hang basket 6, hang basket 6 and have two, hang respectively and locate shaped steel crossbeam 3's both sides, hang basket 6 and include jib 601, hang basket platform 602 and railing 603, hang basket platform 602 and pass through jib 601 and shaped steel crossbeam 3 fixed connection, the equidistant installation on jib 601 of railing 603. Railing 603 set up better protection ligature reinforcing bar's constructor's safety, prevent that constructor from dropping from hanging basket platform 602. The two hanging baskets are respectively positioned at two sides of the continuous wall groove 11 or the bearing frame 14, are formed by combining steel pipe fasteners, are divided into an upper working layer and a lower working layer, are 6 meters long and 800 millimeters wide, and are hung on the section steel structure beam 3 by a 16@1500 steel wire rope.

step 1: digging a continuous wall groove 11 underground, and erecting a bearing frame 14 on the continuous wall groove 11; on the bearing frame 14, a straight thread sleeve 15 is welded at the corresponding position of the main rib 1 and the bearing frame 14; specifically, the straight thread sleeve 15 is welded on the force bearing frame 14. The main reinforcements 1 are vertically arranged downwards one by one through the platform 2 and are fixed on the force bearing frame 14 through straight thread sleeves 15. The main reinforcement 1 is vertically connected, a wall and a column are put down from the section steel structure frame platform 2, two ends of the main reinforcement 1 are sheathed with threads, and the main reinforcement 1 is connected with the main reinforcement 1 through a straight thread sleeve (not shown in the figure);

the steel structure frame on the ground comprises upright posts, cross beams, a main wall reinforcement blanking part, a main reinforcement connecting platform 2, a steel bar hanging basket 6 bound by workers below, and a continuous wall steel bar framework movement automatic control bracket below.

Step 2: hanging baskets 6 and a steel bar binding basket platform 602 are hung on the steel frame, main bars 1 are vertically placed downwards one by one through the basket platform 602, and the steel frame is fixed on a bearing frame 14 through a straight thread sleeve 15;

and step 3: a bearing frame 14 is hung on the section steel beam 3 through a winch 9 and a steel wire rope 10;

and 4, step 4: starting the winch 9 to adjust the bearing frame 14 to the position where the upper opening of the continuous wall groove 11 is flat;

and 5: a part of constructors vertically lower the main reinforcement 1 downwards one by one through the platform 2, and fix the main reinforcement 1 on the bearing frame 14 through the straight thread casing 15;

the other part of the constructors stand in the hanging basket platform 602 to bind the horizontal steel bars 7, the tie bars and the horizontal structure connectors; constructors stand in the cradle platform 602 to work, the position and the platform are unchanged, the steel reinforcement framework flows downwards, the constructors do not move like a vertical assembly line, the construction is safe, and the labor intensity is low;

binding the last section of continuous wall steel reinforcement framework, putting down the last continuous wall steel reinforcement framework, stably seating the continuous wall steel reinforcement framework on the bottom of a continuous wall groove 11, pulling off a rope releasing pin 8 of a steel wire rope 10 at a bearing frame 14 after the elevation inspection acceptance is qualified, and drawing out the steel wire rope 10; specifically, the steel reinforcement framework is 3000mm high at every ligature, and every ligature section is 1500mm high.

And 7: and after the inspection and acceptance are qualified, pouring the concrete of the continuous wall.

The release pin 8 in the construction method is connected with a pin pulling rope 17, and the release pin 8 is separated from the steel wire rope 10 and the force bearing frame 14 by pulling the pin pulling rope 17 to withdraw the steel wire rope 10. A rope sleeve is made at the lower end of the steel wire rope 10, specifically, the lower end of the steel wire rope 10 penetrates through the rope 18 and then goes upwards, the steel wire rope 10 going upwards is bent into a semicircle, the semicircle is embedded into the rope sleeve and is fixed by a drawpin rope 17, the circular ring part of the pin goes upwards in an inclined way and is tied on the drawpin rope 17, the drawpin rope 17 is specifically a cotton rope, and the other end of the cotton rope is tied on a column (not shown in the figure) on the concrete floor 13; in addition, a rope 18 is wound and tied on the end part of the section steel cross beam 3 of the bearing frame 14, and the outside of the rope is fixed by a rope releasing pin 8; the steel wire ropes 10 and the steel wire ropes 18 are well padded at the contact part with the section steel beam 3 by steel rope pads (not shown in the figure). The iron wire 802 passes through the through hole 801 to fix the rope 18 by the rope releasing pin 8.

Referring to fig. 6, in the preferred embodiment, the platform 2 on the section steel beam 3 is a grid-type section steel blanking platform, and a basket 6 and a basket platform 602 thereof are suspended below the section steel beam 3.

As shown in fig. 7, in the present embodiment, a 50mm thick wooden scaffold board is used as the platform 2; the first steel beam 3 is made of N20H-shaped steel, and the distance is 2000 mm. The section steel longitudinal beam 4 is generally made of N16I-shaped steel, and the spacing is 800-1000 mm; the section steel column 5 is moved by N20 i-shaped steel, the 260 × 10 steel pipes are erected, the distance is 2000 mm, and the sizes of the i-shaped steel used in the section steel cross beam 3, the section steel longitudinal beam 4 and the section steel column 5 are calculated according to actual use. Hang 6 jib 601 of basket chooses for use in 48 x 3 steel pipe interval in the well, railing 603 chooses for use in 48 x 2.7 steel pipe interval 900 mm in the well, hang basket platform 602 chooses for use the wooden scaffold board of 50mm thickness, form the platform on the horizontal steel pipe of hanging the basket bottom. Specifically, the bottom-supporting steel tube, i.e., the steel tube under the cradle platform 602, supports a 50mm thick wooden scaffold board to form the platform. The middle section and the rear section of the steel pipe below the platform plate are 48 multiplied by 3 and the distance is 800 mm-1000 mm; the hoisting capacity of the winch 9 is determined by calculation; the specification of the hoisting steel wire rope 10 is determined by calculation, and the distance is 1500 mm; the thickness of the steel plate is 12 mm and is 20-30 mm; the concrete strength grade of the concrete terrace 13 is C25 and 150 mm thick; the force-bearing frame 14 is formed by horizontally welding N14H-shaped steel and cross beams (with the distance of 1500 mm), welding four longitudinal N14H-shaped steel (the number of rows of the N14H-shaped steel is the same as that of the main ribs 1, and welding straight thread sleeves at the corresponding positions of the vertical wall main ribs 1 on the longitudinal H-shaped steel so as to fix the positions of the vertical wall main ribs 1.

The invention relates to a sectional construction device and a construction method for reinforcing steel bars of an underground diaphragm wall, which are used for binding a reinforcing steel bar framework of a vertical underground diaphragm wall on site, do not need a large prefabricated field, bind a section of downward section in the vertical direction, bind a horizontal reinforcing steel bar and a horizontal reinforcing steel bar on a main reinforcing steel bar in the vertical direction according to the design requirement, complete the operation of one section of reinforcing steel bar framework and lower a section of downward section. The prefabricated floor area is small, the requirements on the lifting capacity, the height and the working radius of a lifting machine are low, the operation is safe, workers can perform binding operation in a cradle platform, the positions of the workers are basically not required to be moved in situ, the workers can not change in a centralized mode, the vertical hanging type binding steel bar framework is not deformed, the vertical position is easy to control, the phenomenon that the framework moves and collides with the wall is avoided, the phenomena that the framework cannot be removed when colliding with the wall, ribs are exposed, holes collapse and the like are avoided, and the phenomenon that the continuous wall clamps soil is avoided.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The underground continuous wall steel bar sectional type construction device is characterized by comprising a continuous wall groove positioned underground, wherein a steel plate and a concrete terrace are sequentially laid at the position of a flat upper opening of the continuous wall groove from top to bottom, and the steel plate is fixedly connected with a section steel beam through two section steel columns; the two section steel columns are respectively arranged at two end parts of the section steel beam;

the middle part of the profile steel beam is sequentially connected with a winch, a steel wire rope and a bearing frame from top to bottom; the number of the winches is two, one end of each winch is fixedly connected with the profile steel cross beam, and the other end of each winch is fixedly connected with the bearing frame through a steel wire rope;

the structural steel cross beam is also provided with a plurality of structural steel longitudinal beams, and the tops of the plurality of structural steel longitudinal beams are provided with platforms;

the utility model discloses a hanging basket, including bearing frame, hanging basket platform, railing, fixed connection is a plurality of main muscle of fixed connection, it is a plurality of in proper order equidistant on the main muscle set up horizontal reinforcement, horizontal reinforcement limit ligature limit tenesmus, install on the shaped steel crossbeam and hang the basket, it has two to hang the basket, hangs respectively and locates the both sides of shaped steel crossbeam, hang the basket include the jib, hang basket platform and railing, hang the basket platform pass through the jib with shaped steel crossbeam fixed connection, the equidistant installation of railing on the jib.

2. The construction apparatus as claimed in claim 1, wherein the cross-sectional surface of the continuous wall groove is polygonal or linear.

3. The construction apparatus according to claim 1, wherein a plurality of the section steel longitudinal beams are symmetrically provided on the section steel cross beam.

4. The construction apparatus according to claim 1, wherein the hoist is an automatic interlocking motor hoist.

5. The construction apparatus according to claim 1, wherein the steel plate is welded on the concrete floor.

6. The construction device according to claim 1, wherein a stop ring is arranged below the force bearing frame.

7. A construction method using the underground continuous wall steel bar sectional type construction device of claim 1, comprising the steps of:

step 1: digging a continuous wall groove underground, and erecting the bearing frame on the continuous wall groove; on the bearing frame, welding a straight thread sleeve at the position of the main rib corresponding to the bearing frame;

step 2: hanging a hanging basket and a steel bar binding hanging basket inner platform on a profile steel frame, vertically lowering the main bars one by one downwards through the hanging basket platform, and fixing the main bars on the bearing frame through the straight thread sleeve;

and step 3: the bearing frame is hung on the section steel beam through the winch and the steel wire rope;

and 4, step 4: starting the winch to adjust the bearing frame to the position where the upper opening of the continuous wall groove is flat;

and 5: a part of constructors vertically lower the main reinforcements downwards one by one through the platform, and fix the main reinforcements on the bearing frame through straight thread sleeves;

and 7: and (5) pouring the concrete of the continuous wall.

8. The construction method as claimed in claim 7, wherein a drawpin rope is connected to the rope releasing pin, and the rope is drawn out by pulling the drawpin rope to separate the rope releasing pin from the rope and the carrier.