CN111827262A - Construction method of fold-line-shaped irregular underground continuous wall - Google Patents
Construction method of fold-line-shaped irregular underground continuous wall Download PDFInfo
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- CN111827262A CN111827262A CN202010763352.8A CN202010763352A CN111827262A CN 111827262 A CN111827262 A CN 111827262A CN 202010763352 A CN202010763352 A CN 202010763352A CN 111827262 A CN111827262 A CN 111827262A
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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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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Abstract
The invention discloses a construction method of a fold-line-shaped irregular underground continuous wall, which comprises the following steps: 1) dividing the groove section: no construction joint is left at the corner of the broken line of the underground continuous wall, and two sides of the broken line of the corner are combined into a whole to form a wall; 2) construction of a groove section: punching the groove sections with the length less than 3m to form grooves by using a square hammer punching machine, grabbing the grooves by using a groove grabbing machine at the groove sections with the length more than 3m, leading holes at the corners of the folding lines by using the square hammer punching machine, and then grabbing the groove by using the groove grabbing machine; 3) hoisting a steel reinforcement cage into a groove: the adjacent groove sections after being hoisted into the groove are spliced end to end by adopting a first-stage reinforcement cage and a second-stage reinforcement cage, and the reinforcement cage at the corner of the broken line is a splayed reinforcement cage; 4) and (6) pouring concrete. The invention adopts two forms of reinforcement cage ends to carry out wall joint butt joint, thereby ensuring the quality of construction joints; the 'splayed' steel reinforcement cage is adopted, so that the adverse factor that a construction joint is left at a corner is avoided; the problems of offset and dislocation of the formed groove, poor verticality, hole collapse and necking are solved by using a square punch hammer.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method of a fold-line-shaped irregular underground continuous wall.
Background
At present, the used machinery of underground continuous wall grooving construction is mainly a grooving machine, the size of a common grooving machine according to different grab buckets of power models is generally 3-6 meters, and when the underground continuous wall is in a broken line and is irregularly similar to an arc or in an S-shaped arrangement, the grooving quality is difficult to ensure during 3-6 meter grab bucket construction. As is well known, the underground continuous wall is often applied to projects with complex geological conditions and high requirements for water-stop support, and is particularly used as a two-in-one underground continuous wall of an underground outdoor wall structure, so that the requirement of the underground continuous wall on construction joints of a wall body is very high, and the construction joints play a great role in strength, rigidity and stability of the underground continuous wall. Therefore, the optimization treatment of the using mode of the trenching machine, the treatment of the construction joints, the manufacturing and hoisting of the reinforcement cage, the division of the groove sections and other processes is the key point for making up the defects of the conventional construction process and improving the construction quality of the diaphragm wall.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a fold-line-shaped irregular underground continuous wall, which is used for improving the construction quality of the underground continuous wall.
In order to solve the technical problems, the invention adopts the following technical scheme:
a construction method of a fold line-shaped irregular underground continuous wall comprises the following steps:
1) dividing the groove section: two reinforcement cages are spliced between two adjacent groove sections of the linear part of the underground continuous wall, no construction joint is reserved at the corner of the broken line of the underground continuous wall, and two sides of the broken line of the corner are combined into one wall;
2) construction of a groove section: punching a groove section with the length less than 3m to form a groove by using a square hammer punching machine, grabbing the groove by using a groove grabbing machine for the groove section with the length more than 3m, and if the groove section using the groove grabbing machine is positioned at a corner of a broken line of the underground continuous wall, leading holes by using the square hammer punching machine firstly, and grabbing earthwork between holes of the leading holes by using the groove grabbing machine;
3) hoisting a steel reinforcement cage into a groove: the first-stage reinforcement cage or the second-stage reinforcement cage at the corner of the broken line is an eight-shaped reinforcement cage matched with the corner angle of the broken line;
4) pouring concrete: placing the base of the guide pipe to a specified position of the groove section by using a crane, hoisting the guide pipe into the groove section by section, splicing the groove openings section by section to form a designed length, then placing the guide pipe to the bottom of the groove, and placing a circular pouring funnel on the top end of the guide pipe; before the first use of the conduit, a water sealing test is firstly carried out on the ground, and the test pressure is not less than 3Kg/cm2(ii) a Before concrete is poured, a waterproof bolt for ensuring the isolation of the concrete and the slurry is placed in the guide pipe; and (5) pulling and washing the pipe after pouring.
In the above technical scheme:
the processing method of the first-stage reinforcement cage and the second-stage reinforcement cage comprises the following steps:
two ends of the first-stage reinforcement cage are welded by I-shaped steel to form a groove-shaped interface, and two ends of the second-stage reinforcement cage are welded by sealing ribs to form a triangular joint; the joint of the second-stage reinforcement cage can be inserted into the groove-shaped joint of the first-stage reinforcement cage.
The processing method of the splayed reinforcement cage comprises the following steps:
firstly, a pedestal with a triangular cross section is built on the ground, the included angle between the slope surface of the pedestal and the ground is the same as the angle of a broken line corner of the underground continuous wall, two sections of steel reinforcement cages with the inverted V shape are respectively processed on the ground and the slope surface of the pedestal to form two sections of included angles, the two sections of cages are symmetrically arranged, and reinforcing ribs are arranged at the positions of the broken lines of the corners of the steel reinforcement cages with the inverted V shape along the longitudinal direction of the wall body at intervals of 3-5 m.
The steps of hoisting the reinforcement cage into the groove are as follows:
1) lifting the crane in a horizontal mode: the double-crane lifting is used, the center of a lifting hook is coincided with the gravity center of the steel reinforcement cage during lifting, and a main lifting appliance and an auxiliary lifting appliance are connected with each lifting point of the steel reinforcement cage; checking whether the connection of the fasteners is good or not and whether the steel wire rope is straight or not; tensioning the steel wire rope, checking whether the steel wire ropes of the main crane and the auxiliary crane are vertical to the central line of the steel reinforcement cage, and moving the crane if the steel wire ropes of the main crane and the auxiliary crane are not vertical to each other until the steel wire ropes of the crane are vertical to each other; lifting the reinforcement cage to 200-300mm away from the ground, and checking the condition of welding points near the hoisting point and whether bending exists in the penetrating rod;
2) inclined lifting: the main crane slowly lifts the reinforcement cage to 12-25 m, and the auxiliary crane keeps 0.4-0.6m away from the ground, so that the reinforcement cage is inclined;
3) counter-rotating by a crane: keeping the main crane still, and enabling the main hook of the auxiliary crane to rotate and move towards the main crane direction; the main crane gradually tightens the steel wire rope and rotates towards the auxiliary hoisting direction until the reinforcement cage is vertically erected; after the reinforcement cage is vertical, the auxiliary crane is lowered, the auxiliary crane sling is removed, and the main crane horizontally transports the reinforcement cage to a preset position for lowering.
Furthermore, the hoisting point is arranged at the intersection point of the longitudinal truss and the transverse truss.
Furthermore, the hanging points of the splayed reinforcement cage are two columns symmetrically arranged on the two sections of cage bodies, and the gravity center of the cross section of the splayed reinforcement cage and the projection of the two columns of hanging points on the cross section are positioned on the same straight line.
The placement method of the catheter comprises the following steps:
the groove section with the length less than 3m is provided with a set of guide pipes, the groove section with the length more than 3m is provided with two sets of guide pipes, and the distance between the guide pipes and the end part of the groove is 1 meter.
The invention has the advantages that:
1. wall joint butt joint is carried out by adopting two forms of reinforcement cage ends, the two ends of the reinforcement cage in the first stage are welded by I-shaped steel, and the reinforcement cage in the second stage is welded by a sealing rib, so that stable splicing of the reinforcement cage is ensured, and the quality of a construction joint is ensured;
2. the 'eight' -shaped reinforcement cage is skillfully adopted, so that the adverse factor that the construction joint is kept at a corner is avoided, and the irregular broken line type is also ensured;
3. the problems of offset dislocation, poor verticality and hole collapse necking of the formed groove are solved by using a square punch hammer;
4. the steel reinforcement cage is geometrically symmetrical, and the gravity center is just on the same straight line with the hoisting point, so that the safety and the construction quality of the hoisting process are ensured.
Drawings
FIG. 1 is a block flow diagram of a preferred embodiment.
Fig. 2 is a schematic view of processing of an eight-shaped reinforcement cage. In the figure: 1-pedestal and 2-splayed reinforcement cage.
Fig. 3 is a schematic structural view of a first-stage reinforcement cage. In the figure: 3-a cage body of a first-stage reinforcement cage, and 4-I-shaped steel.
Fig. 4 is a schematic structural view of a second-stage reinforcement cage. In the figure: 5-cage body of second-stage reinforcement cage, 6-sealing rib.
FIG. 5 is a distribution diagram of the hanging points of the steel reinforcement cage shaped like Chinese character 'ba'. The position of the ring in the figure is the hanging point.
Fig. 6-8 are schematic diagrams illustrating position changes of the reinforcement cage in the process of hoisting the reinforcement cage into the groove.
Detailed Description
The following examples are provided only for illustrating and explaining the present invention and are not intended to limit the present invention.
Referring to fig. 1 to 8, the construction method of the zigzag irregular underground continuous wall of the present embodiment includes the following steps:
1. groove segment division
Two reinforcement cages are spliced between two adjacent groove sections of the straight line part of the underground continuous wall, no construction joint is reserved at the corner of the broken line of the underground continuous wall, and two sides of the broken line of the corner are combined into a whole to form a wall.
To prevent the groove walls from collapsing, the groove segment length should be reduced to shorten the grooving time. The scheme that two cages are spliced at the broken line corner is not adopted, namely the construction joint is not left at the corner broken line, so that the advantage that the construction joint is prevented from being left at an unfavorable position is achieved, and the strength, the rigidity and the stability of the underground continuous wall are improved.
2. Construction of trough section
And punching the groove section with the length less than 3m by using a square hammer punching machine to form the groove, and grabbing the groove by using a groove grabbing machine for the groove section with the length more than 3 m. Due to the construction of the groove sections of the special-shaped cages such as the eight cage and the like, the requirement on the verticality is strict, and the groove entering failure can be caused by slight deviation or dislocation. Therefore, if the groove section using the groove grabbing machine is positioned at the corner of the broken line of the underground continuous wall, the hole is led by using a square hammer punching machine, and then earth and stone squares between holes of the lead holes are grabbed by using the groove grabbing machine.
3. Fabrication of reinforcement cage
Manufacturing a first-stage reinforcement cage and a second-stage reinforcement cage: two ends of the first-stage reinforcement cage are welded by I-shaped steel to form a groove-shaped interface, and two ends of the second-stage reinforcement cage are welded by sealing ribs to form a triangular joint; the joint of the second-stage reinforcement cage can be inserted into the groove-shaped joint of the first-stage reinforcement cage.
Manufacturing an inverted V-shaped reinforcement cage: firstly, a pedestal with a triangular cross section is built on the ground, the included angle between the slope surface of the pedestal and the ground is the same as the angle of a broken line corner of the underground continuous wall, two sections of steel reinforcement cages with the inverted V shape are respectively processed on the ground and the slope surface of the pedestal to form two sections of included angles, the two sections of cages are symmetrically arranged, and reinforcing ribs are arranged at the positions of the broken lines of the corners of the steel reinforcement cages with the inverted V shape along the longitudinal direction of the wall body at intervals of 3-5 m.
4. Steel reinforcement cage hoisting groove
The hoisting of the reinforcement cage adopts double-crane hoisting, which is the core process of hoisting construction, and particularly in the hoisting of an ultra-long and ultra-heavy reinforcement cage, the hoisting safety is directly influenced by the arrangement of hoisting points and the selection of hoisting equipment. The hanging points of the splayed reinforcement cage are two rows symmetrically arranged on the two cage bodies, the gravity center of the cross section of the splayed reinforcement cage and the projection of the two rows of hanging points on the cross section are positioned on the same straight line, the hanging points are arranged at the intersection point of the longitudinal truss and the transverse truss, and the specific distribution of the hanging points refers to fig. 5. And the first-stage reinforcement cage or the second-stage reinforcement cage at the corner of the broken line is an 'eight' -shaped reinforcement cage matched with the corner angle of the broken line.
The steps of hoisting the reinforcement cage into the groove specifically comprise:
4.1 leveling and lifting: referring to fig. 6, when the double-crane lifting crane is used, the center of the lifting hook must coincide with the center of gravity of the steel reinforcement cage during lifting, and the main crane and the auxiliary crane are connected with each lifting point of the steel reinforcement cage; checking whether the connection of the fasteners is good or not and whether the steel wire rope is straight or not; tensioning the steel wire rope, checking whether the steel wire ropes of the main crane and the auxiliary crane are vertical to the central line of the steel reinforcement cage, and moving the crane if the steel wire ropes of the main crane and the auxiliary crane are not vertical to each other until the steel wire ropes of the crane are vertical to each other; lifting the reinforcement cage to 200-300mm away from the ground, and checking the condition of welding points near the hoisting point and whether bending exists in the penetrating rod;
4.2 inclined lifting: referring to fig. 7, the main crane slowly lifts the reinforcement cage to 12-25 m, and the auxiliary crane keeps 0.4-0.6m away from the ground, so that the reinforcement cage is inclined;
4.3 counter-rotating by a crane: referring to fig. 8, the main hanger is kept still, and the main hook of the auxiliary hanger rotates and moves towards the main hanger direction; the main crane gradually tightens the steel wire rope and rotates towards the auxiliary hoisting direction until the reinforcement cage is vertically erected; after the reinforcement cage is vertical, the auxiliary crane is lowered, the auxiliary crane sling is removed, and the main crane horizontally transports the reinforcement cage to a preset position for lowering.
5. Pouring of concrete
Placing the guide pipe base at the specified position of the groove section by using a crane, lifting the guide pipes in sections to enter the groove, placing one set of guide pipe at the groove section with the length less than 3m, placing two sets of guide pipes at the groove section with the length more than 3m, and gradually placing the guide pipes at the groove openingAfter the sections are spliced into the designed length, the sections are put to the bottom of the tank, the distance between the guide pipe and the end part of the tank is 1 m, and a circular pouring funnel is arranged on the top end of the guide pipe; before the first use of the conduit, a water sealing test is firstly carried out on the ground, and the test pressure is not less than 3Kg/cm2(ii) a Before concrete is poured, a waterproof bolt for ensuring the isolation of the concrete and the slurry is placed in the guide pipe; and (5) pulling and washing the pipe after pouring.
Claims (7)
1. A construction method of a fold line-shaped irregular underground continuous wall is characterized by comprising the following steps:
1) dividing the groove section: two reinforcement cages are spliced between two adjacent groove sections of the linear part of the underground continuous wall, no construction joint is reserved at the corner of the broken line of the underground continuous wall, and two sides of the broken line of the corner are combined into one wall;
2) construction of a groove section: punching a groove section with the length less than 3m to form a groove by using a square hammer punching machine, grabbing the groove by using a groove grabbing machine for the groove section with the length more than 3m, and if the groove section using the groove grabbing machine is positioned at a corner of a broken line of the underground continuous wall, leading holes by using the square hammer punching machine firstly, and grabbing earthwork between holes of the leading holes by using the groove grabbing machine;
3) hoisting a steel reinforcement cage into a groove: the first-stage reinforcement cage or the second-stage reinforcement cage at the corner of the broken line is an eight-shaped reinforcement cage matched with the corner angle of the broken line;
4) pouring concrete: placing the base of the guide pipe to a specified position of the groove section by using a crane, hoisting the guide pipe into the groove section by section, splicing the groove openings section by section to form a designed length, then placing the guide pipe to the bottom of the groove, and placing a circular pouring funnel on the top end of the guide pipe; before the first use of the conduit, a water sealing test is firstly carried out on the ground, and the test pressure is not less than 3Kg/cm2(ii) a Before concrete is poured, a waterproof bolt for ensuring the isolation of the concrete and the slurry is placed in the guide pipe; and (5) pulling and washing the pipe after pouring.
2. The construction method according to claim 1, wherein the first-stage reinforcement cage and the second-stage reinforcement cage are processed by a method comprising: two ends of the first-stage reinforcement cage are welded by I-shaped steel to form a groove-shaped interface, and two ends of the second-stage reinforcement cage are welded by sealing ribs to form a triangular joint; the joint of the second-stage reinforcement cage can be inserted into the groove-shaped joint of the first-stage reinforcement cage.
3. The construction method according to claim 2, wherein the processing method of the splayed reinforcement cage comprises the following steps: firstly, a pedestal with a triangular cross section is built on the ground, the included angle between the slope surface of the pedestal and the ground is the same as the angle of a broken line corner of the underground continuous wall, two sections of steel reinforcement cages with the inverted V shape are respectively processed on the ground and the slope surface of the pedestal to form two sections of included angles, the two sections of cages are symmetrically arranged, and reinforcing ribs are arranged at the positions of the broken lines of the corners of the steel reinforcement cages with the inverted V shape along the longitudinal direction of the wall body at intervals of 3-5 m.
4. The construction method according to claim 1, wherein the step of hoisting the reinforcement cage into the groove comprises:
1) lifting the crane in a horizontal mode: the double-crane lifting is used, the center of a lifting hook is coincided with the gravity center of the steel reinforcement cage during lifting, and a main lifting appliance and an auxiliary lifting appliance are connected with each lifting point of the steel reinforcement cage; checking whether the connection of the fasteners is good or not and whether the steel wire rope is straight or not; tensioning the steel wire rope, checking whether the steel wire ropes of the main crane and the auxiliary crane are vertical to the central line of the steel reinforcement cage, and moving the crane if the steel wire ropes of the main crane and the auxiliary crane are not vertical to each other until the steel wire ropes of the crane are vertical to each other; lifting the reinforcement cage to 200-300mm away from the ground, and checking the condition of welding points near the hoisting point and whether bending exists in the penetrating rod;
2) inclined lifting: the main crane slowly lifts the reinforcement cage to 12-25 m, and the auxiliary crane keeps 0.4-0.6m away from the ground, so that the reinforcement cage is inclined;
3) counter-rotating by a crane: keeping the main crane still, and enabling the main hook of the auxiliary crane to rotate and move towards the main crane direction; the main crane gradually tightens the steel wire rope and rotates towards the auxiliary hoisting direction until the reinforcement cage is vertically erected; after the reinforcement cage is vertical, the auxiliary crane is lowered, the auxiliary crane sling is removed, and the main crane horizontally transports the reinforcement cage to a preset position for lowering.
5. The construction method according to claim 4, wherein: and the hoisting point is arranged at the intersection point of the longitudinal truss and the transverse truss.
6. The construction method according to claim 4 or 5, wherein: the hanging points of the splayed reinforcement cage are two rows symmetrically arranged on the two sections of cage bodies, and the gravity center of the cross section of the splayed reinforcement cage and the projection of the two rows of hanging points on the cross section are positioned on the same straight line.
7. The construction method according to claim 1, wherein the conduit is installed by: the groove section with the length less than 3m is provided with a set of guide pipes, the groove section with the length more than 3m is provided with two sets of guide pipes, and the distance between the guide pipes and the end part of the groove is 1 meter.
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| CN202010763352.8A CN111827262A (en) | 2020-07-31 | 2020-07-31 | Construction method of fold-line-shaped irregular underground continuous wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115434304A (en) * | 2022-08-06 | 2022-12-06 | 河南黄河河务局工程建设中心 | Construction method for long auger bored pile super-long reinforcement cage pile-entering hole |
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| CN115434304A (en) * | 2022-08-06 | 2022-12-06 | 河南黄河河务局工程建设中心 | Construction method for long auger bored pile super-long reinforcement cage pile-entering hole |
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Application publication date: 20201027 |
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| RJ01 | Rejection of invention patent application after publication |