Hoisting and mounting integrated construction method for prefabricated wall pieces of fabricated diaphragm wall

Abstract

The invention relates to a hoisting and mounting integrated construction method for prefabricated wall pieces of an assembled diaphragm wall, which comprises the following steps of: laying two guide rails on two sides of a foundation groove of the diaphragm wall, arranging a movable hanging bracket capable of moving along the guide rails on the two guide rails, and mounting two winches on the movable hanging bracket, a prefabricated wall piece lifting platform is arranged on the ground between two rails on the outer side of one end of an underground diaphragm wall base groove, a movable lifting frame lifts a first prefabricated wall piece to the position above a piece mounting position, a pin rod is adopted for temporary supporting after the first prefabricated wall piece is lowered by a certain height, and then a second prefabricated wall piece is lifted to be connected with the first prefabricated wall piece; after the whole is lowered to a certain height, a pin rod is adopted for temporary supporting; and subsequent wall pieces are sequentially hoisted according to the same method, and mounting construction of the prefabricated diaphragm wall is completed. The adopted movable hanging bracket has walking and hoisting functions, the structure is simple, the investment of large equipment can be reduced, the construction cost is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground continuous wall construction in construction projects, and specifically to an integrated construction method for lifting and installing prefabricated wall panels of an assembled ground-connected wall. Background Art

[0002] Underground continuous wall (ground-connected wall) is a common underground support facility in construction projects, and is widely used in large underground projects such as deep foundation pits and bridge anchors. Traditional ground-connected wall construction mostly adopts cast-in-place method, but the amount of concrete poured on site is large, the construction progress is slow, and the quality cannot be guaranteed. At present, the construction of ground-connected wall has developed from cast-in-place method to prefabricated method.

[0003] The assembled ground-connected wall is to divide the ground-connected wall into multiple sections longitudinally, and each section is vertically divided into multiple prefabricated wall pieces. The prefabricated wall pieces are transported to the site after being processed in the prefabrication field, and are hoisted piece by piece and section by section. Patent CN115613548A discloses a prefabricated ground-connected wall construction device and a construction method thereof, which sets up a guide positioning frame and two through-type jacks above the foundation groove of the ground-connected wall. The first prefabricated wall piece of the first ground-connected wall is hoisted into the guide positioning frame by a large hoisting device. The two through-type jacks are connected to the wall piece through a suspension rod and slowly lowered. After being lowered to a certain height, the crane hoists the second wall piece into the guide positioning frame, connects it to the first wall piece, and then continues to lower it; after one ground-connected wall is installed, the positioning guide frame is moved forward to lower the second ground-connected wall, and the construction is cyclically repeated. The above construction method requires large cranes and transport vehicles to follow the construction, which occupies large equipment for a long time and has high costs. In addition, the guide positioning frame needs to be assisted by a crane to move, and the lowering speed of the through-type jack is slow, resulting in low construction efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated construction method for lifting and installing prefabricated wall panels of assembled ground-connected walls in order to reduce the investment in large equipment to reduce construction costs and improve construction efficiency.

[0005] The technical solution of the present invention is as follows:

[0006] An integrated construction method for hoisting and installing prefabricated wall panels of an assembled ground-connected wall, characterized by comprising the following steps:

[0007] (1) Two guide rails are laid on the ground on both sides of the foundation trench of the ground-connected wall along the longitudinal direction of the foundation trench, and a movable hanger is arranged on the two guide rails. The movable hanger includes a frame beam welded from two longitudinal beams and two transverse beams. A column is welded to the bottom of each of the four corners of the frame beam. A track wheel is installed at the bottom of each column. The track wheels on both sides of the hanger are supported on the two guide rails and can move along the tracks; a load-bearing beam is set between the tops of the two transverse beams of the frame beam, and two winches are fixedly installed on the load-bearing beam;

[0008] (2) When processing the prefabricated wall pieces, two sockets are symmetrically arranged near the top of each prefabricated wall piece; a prefabricated wall piece lifting platform is arranged on the ground between two tracks outside one end of the ground-connected wall foundation groove, and a transport vehicle transports the prefabricated wall piece to the lifting platform;

[0009] (3) The mobile hanger moves along the track to the lifting platform, lifts the first prefabricated wall piece through two winches, and moves along the track to the top of the prefabricated wall piece installation position;

[0010] (4) Two cushion beams are arranged on the ground inside the two tracks on both sides of the top of the foundation trench of the ground-connected wall along the longitudinal direction of the foundation trench;

[0011] (5) Control the winch to lower the prefabricated wall piece into the foundation groove of the ground-connected wall until the two through holes at the upper end thereof are close to the two cushion beams, and insert a pin rod into each of the two through holes along the foundation groove horizontally, with the length of the pin rod being less than the distance between the two tracks; the winch continues to lower the prefabricated wall piece so that the two ends of each pin rod are supported on the two cushion beams respectively, and the weight of the prefabricated wall piece is completely borne by the two pin rods;

[0012] (6) Loosen the hoist rope of the winch, push the mobile hanger to the lifting platform to lift the second prefabricated wall piece, and move it above the first prefabricated wall piece;

[0013] (7) Lay a rubber water stop on the top of the first prefabricated wall piece, and place two pads on the rubber water stop; lower the second prefabricated wall piece onto the two pads, and connect the prestressed steel strands of the two prefabricated wall pieces with a connector;

[0014] (8) The winch slightly lifts the second prefabricated wall piece upward, removes the pad, and then lowers the second prefabricated wall piece onto the first prefabricated wall piece; the prestressed steel strands connecting the two prefabricated wall pieces are tensioned, and after tensioning, grouting and anchoring are performed to complete the connection between the two prefabricated wall pieces;

[0015] (9) The winch first lifts the two prefabricated wall pieces upward, extracts the pin rod in the through hole of the first prefabricated wall piece, and then lowers the two prefabricated wall pieces as a whole until the through hole at the upper end of the second prefabricated wall piece is close to the cushion beam, inserts the two pin rods into the through holes on the second prefabricated wall piece, and then continues to lower until the two pin rods are supported on the cushion beam;

[0016] (10) Repeat steps (6) to (9) to sequentially hoist the subsequent prefabricated wall pieces of a ground-connected wall until the ground-connected wall is lowered to the bottom of the foundation trench and gravel is filled on both sides of the ground-connected wall to complete the lowering and installation construction of a prefabricated ground-connected wall;

[0017] (11) Repeat the above steps (3) to (10) to sequentially carry out the lowering construction of the subsequent prefabricated wall segments of each ground-connected wall.

[0018] The mobile hanger adopted in the present invention has walking and lifting functions, simple structure, convenient moving and lowering operations, and can realize the integrated construction of lifting and lowering installation of prefabricated wall panels, which can reduce the investment in large equipment and thus reduce construction costs; a winch is used to lift and lower the prefabricated wall panels, and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the side view structure of the movable support and hanger adopted by the present invention and the state of lowering the first prefabricated wall piece;

[0020] Figure 2 It is a schematic diagram of the front elevation structure of the mobile support and hanger and the state of lowering the first prefabricated wall piece;

[0021] Figure 3 It is a schematic diagram of the planar structure of the mobile support and hanger;

[0022] Figure 4 This is a schematic diagram of the state of the second prefabricated wall piece being lowered by the mobile support and hanger;

[0023] Figure 5 This is a schematic diagram of the state after the two prefabricated wall panels are connected;

[0024] Figure 6 This is a schematic diagram of the state of the mobile support bracket lowering the third prefabricated wall piece. DETAILED DESCRIPTION

[0025] The specific construction method of the present invention is as follows:

[0026] (1) Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, two guide rails 1 are laid on the ground on both sides of the foundation groove 100 of the ground-connected wall along the longitudinal direction of the foundation groove, and a movable hanger is arranged on the two guide rails. The movable hanger includes a frame beam welded by two longitudinal beams 2 and two transverse beams 3. A column 4 is welded to the bottom of the four corners of the frame beam respectively, and a track wheel 5 is installed at the bottom of each column 4. The track wheels 5 on both sides of the hanger are respectively supported on the two guide rails 1 and can move along the track; a load-bearing beam 6 is set between the tops of the two transverse beams 3 of the frame beam, and two winches 7 are fixedly installed on the load-bearing beam 6;

[0027] (2) When processing the prefabricated wall pieces, two sockets 201 are symmetrically arranged near the top of each prefabricated wall piece 200; a prefabricated wall piece lifting platform is arranged on the ground between two tracks 1 outside one end of the ground-connected wall foundation groove, and a transport vehicle transports the prefabricated wall piece 200 to the lifting platform;

[0028] (3) The mobile hanger moves along the track to the lifting platform, and the first prefabricated wall piece 200 is lifted by the two winches 7 through the lifting ropes, and moved along the track 1 to the top of the prefabricated wall piece installation position;

[0029] (4) Two cushion beams 8 are arranged on the ground inside the two tracks on both sides of the top of the foundation trench of the ground-connected wall along the longitudinal direction of the foundation trench;

[0030] (5) Control the winch to lower the prefabricated wall piece into the foundation groove of the ground-connected wall until the two through holes at the upper end thereof are close to the two cushion beams 8, and insert a pin rod 9 into each of the two through holes along the foundation groove horizontally, with the length of the pin rod being less than the distance between the two tracks; the winch continues to lower the prefabricated wall piece so that both ends of each pin rod 9 are supported on the two cushion beams 8 respectively, and the weight of the prefabricated wall piece 200 is completely borne by the two pin rods 9;

[0031] (6) Figure 4 As shown, the hoist rope of the winch is loosened, and the mobile hanger is pushed to the lifting platform to lift the second prefabricated wall piece 200, and moved to the top of the first prefabricated wall piece;

[0032] (7) Lay a rubber water stop on the top of the first prefabricated wall piece 200, and place two pads 10 on the rubber water stop; lower the second prefabricated wall piece onto the two pads 10, and connect the prestressed steel strands 11 of the two prefabricated wall pieces with a connector;

[0033] (8) The hoist slightly lifts the second prefabricated wall piece upward, removes the spacer block 10, and then lowers the second prefabricated wall piece 200 onto the first prefabricated wall piece; tensions the prestressed steel strands connecting the two prefabricated wall pieces, and after tensioning, grouting and anchoring are performed to complete the connection between the two prefabricated wall pieces 200;

[0034] (9) Figure 5 As shown, the winch 7 first lifts the two prefabricated wall pieces upward, extracts the pin rod in the through hole of the first prefabricated wall piece, and then lowers the two prefabricated wall pieces as a whole until the through hole at the upper end of the second prefabricated wall piece is close to the cushion beam, inserts the two pin rods 9 into the through holes on the second prefabricated wall piece 200, and then continues to lower until the two pin rods 9 are supported on the cushion beam 8;

[0035] (10) Figure 6 As shown, repeat steps (6) to (9) to sequentially hoist the subsequent prefabricated wall pieces of a ground-connected wall until the ground-connected wall is lowered to the bottom of the foundation trench, and fill the two sides of the ground-connected wall with gravel to complete the lowering and installation construction of a prefabricated ground-connected wall;

[0036] (11) Repeat the above steps (3) to (10) to sequentially carry out the lowering construction of the subsequent prefabricated wall segments of each ground-connected wall.

[0037] When the above construction method is implemented, a vertical plate 12 can be welded to the top surface of each cross beam 3 of the movable hanger and on both sides of the load-bearing beam 6, and an adjusting screw 13 is inserted between the two vertical plates 12 on each cross beam. The adjusting screw 13 passes through the load-bearing beam 6 and is screwed with the load-bearing beam. A limit block 14 is welded on the outer side of the two vertical plates on the adjusting screw 13, and a rotating handle 15 is welded at one end of the adjusting screw; the load-bearing beam 6 is slidably arranged on the top surface of the cross beam 3, and by rotating the adjusting screw 13, the load-bearing beam 6 can be driven to slide on the cross beam 3, which is used to adjust the prefabricated wall piece 200 to face the center of the ground-connected wall foundation groove 100 when the prefabricated wall piece is lowered.

[0038] like Figure 2 As shown in , when the above-mentioned construction method is implemented, a reverse corbel 16 can be welded on the outer side of each column 4 of the mobile hanger near the lower end; when the mobile bracket lowers the prefabricated wall piece, a jack 17 is set under each reverse corbel 16, and four jacks are started simultaneously to push the reverse corbel upward to lift the four running wheels 5 of the mobile hanger off the track. The weight of the mobile hanger and the prefabricated wall piece is borne by the jack 17 to avoid damage to the running wheels.

Claims

1. An integrated construction method for hoisting and installing prefabricated wall panels of assembled ground-connected walls, characterized in that: The following steps are involved: (1) Two guide rails are laid on the ground on both sides of the foundation trench of the ground-connected wall along the longitudinal direction of the foundation trench, and a movable hanger is arranged on the two guide rails. The movable hanger includes a frame beam welded from two longitudinal beams and two transverse beams. A column is welded to the bottom of each of the four corners of the frame beam. A track wheel is installed at the bottom of each column. The track wheels on both sides of the hanger are supported on the two guide rails and can move along the tracks; a load-bearing beam is set between the tops of the two transverse beams of the frame beam, and two winches are fixedly installed on the load-bearing beam; (2) When processing the prefabricated wall pieces, two sockets are symmetrically arranged near the top of each prefabricated wall piece; a prefabricated wall piece lifting platform is arranged on the ground between two tracks outside one end of the ground-connected wall foundation groove, and a transport vehicle transports the prefabricated wall piece to the lifting platform; (3) The mobile hanger moves along the track to the lifting platform, lifts the first prefabricated wall piece through two winches, and moves along the track to the top of the prefabricated wall piece installation position; (4) Two cushion beams are arranged on the ground inside the two tracks on both sides of the top of the foundation trench of the ground-connected wall along the longitudinal direction of the foundation trench; (5) Control the winch to lower the prefabricated wall piece into the foundation groove of the ground-connected wall until the two through holes at the upper end thereof are close to the two cushion beams, and insert a pin rod into each of the two through holes along the foundation groove horizontally, with the length of the pin rod being less than the distance between the two tracks; the winch continues to lower the prefabricated wall piece so that the two ends of each pin rod are supported on the two cushion beams respectively, and the weight of the prefabricated wall piece is completely borne by the two pin rods; (6) Loosen the hoist rope of the winch, push the mobile hanger to the lifting platform to lift the second prefabricated wall piece, and move it above the first prefabricated wall piece; (7) Lay a rubber water stop on the top of the first prefabricated wall piece, and place two pads on the rubber water stop; lower the second prefabricated wall piece onto the two pads, and connect the prestressed steel strands of the two prefabricated wall pieces with a connector; (8) The winch slightly lifts the second prefabricated wall piece upward, removes the pad, and then lowers the second prefabricated wall piece onto the first prefabricated wall piece; the prestressed steel strands connecting the two prefabricated wall pieces are tensioned, and after tensioning, grouting and anchoring are performed to complete the connection between the two prefabricated wall pieces; (9) The winch first lifts the two prefabricated wall pieces upward, extracts the pin rod in the through hole of the first prefabricated wall piece, and then lowers the two prefabricated wall pieces as a whole until the through hole at the upper end of the second prefabricated wall piece is close to the cushion beam, inserts the two pin rods into the through holes on the second prefabricated wall piece, and then continues to lower until the two pin rods are supported on the cushion beam; (10) Repeat steps (6) to (9) to sequentially hoist the subsequent prefabricated wall pieces of a ground-connected wall until the ground-connected wall is lowered to the bottom of the foundation trench and gravel is filled on both sides of the ground-connected wall to complete the lowering and installation construction of a prefabricated ground-connected wall; (11) Repeat the above steps (3) to (10) to sequentially carry out the lowering construction of the subsequent prefabricated wall segments of each ground-connected wall.

2. The integrated construction method for lifting and installing prefabricated wall panels of an assembled ground-connected wall according to claim 1 is characterized in that: A vertical plate is welded to the top surface of each cross beam of the movable hanger and both sides of the load-bearing beam respectively, an adjusting screw is arranged between the two vertical plates on each cross beam, the adjusting screw passes through the load-bearing beam and is screwed with the load-bearing beam, a limit block is welded on the outer side of the two vertical plates on the adjusting screw respectively, and a rotating handle is welded at one end of the adjusting screw; the load-bearing beam is slidably arranged on the top surface of the cross beam, and the adjusting screw is rotated to drive the load-bearing beam to slide on the cross beam, so as to adjust the prefabricated wall piece to face the center of the ground-connected wall foundation groove.

3. The integrated construction method for lifting and installing prefabricated wall panels of an assembled ground-connected wall according to claim 1 is characterized in that: A bull leg is welded on the outer side of each column of the mobile hanger near the lower end; when the prefabricated wall piece is lowered for installation, a jack is arranged under each bull leg, and four jacks are started synchronously to push the bull leg upward, so as to lift the four running wheels of the mobile hanger off the track.

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