CN112408197A - Hoisting method for reinforcement cage of underground continuous wall - Google Patents
Hoisting method for reinforcement cage of underground continuous wall Download PDFInfo
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- CN112408197A CN112408197A CN202011298269.4A CN202011298269A CN112408197A CN 112408197 A CN112408197 A CN 112408197A CN 202011298269 A CN202011298269 A CN 202011298269A CN 112408197 A CN112408197 A CN 112408197A
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- hoisting
- reinforcement cage
- crane
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- sling
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a hoisting method of a reinforcement cage of an underground continuous wall. The method comprises the following steps: step 1: the main sling and the auxiliary sling are installed in place, and each conversion sling is installed to complete the preparation work of hoisting; step 2: the double-crane lifting crane lifts the reinforcement cage off the ground, after the reinforcement cage is lifted to a height of more than 0.3 m, the main crane is lifted continuously until the reinforcement cage is completely upright, and the auxiliary crane is removed; and step 3: moving the main sling load to a position where the reinforcement cage enters the groove, and lowering the reinforcement cage; when the steel bar cage is placed to a second hoisting point of the main crane, the steel bar cage is temporarily placed on the guide wall by the placing section steel, and the sling of the main crane is loosened and connected with the first conversion sling; and 4, step 4: and continuously transferring to the first lifting point of the main crane, temporarily placing again, connecting the sling of the main crane and the second conversion sling, gradually transferring the steel reinforcement cage, and repairing the horizontal rib in the horizontal rib area after repair welding to finish hoisting. The hoisting method is safer in hoisting and faster in work efficiency, the main crane bears more weight when the main crane is lifted by the double cranes, and the load of the auxiliary crane is reduced.
Description
Technical Field
The invention relates to the field of a continuous wall construction method, in particular to a hoisting method for a reinforcement cage of an underground continuous wall.
Background
According to the conventional double-machine lifting and hoisting method for the reinforcement cage, the elevation of the top of the cage is used as a first hoisting point of a main crane, and each hoisting point of the main crane and each hoisting point of an auxiliary crane are sequentially distributed downwards; for example: 4-point hoisting of a main crane and 6-point hoisting of an auxiliary crane; a main crane is transversely hung for 2-4 points and longitudinally hung for 2-3 points; and (3) a multi-point hoisting method with 2-4 transverse points and 2-5 longitudinal points of the auxiliary hoisting.
The double-crane lifting process is that the main crane and the auxiliary crane horizontally lift the reinforcement cage off the ground, and then the main crane is lifted until the reinforcement cage is horizontally rotated and erected. When the steel reinforcement cage is placed in the groove and reaches a second lifting point of the main crane, the steel reinforcement cage is placed in the groove opening through a second placing point, a sling of the second lifting point of the main crane is loosened and is connected with a sling of the lifting point conversion, and the lifting point conversion is completed; and continuously transferring the steel reinforcement cage to a first hoisting point of the main crane, placing the steel reinforcement cage at the notch at the first placing point again, converting the sling to a hoisting ring at the top of the cage, and finally completing hoisting of the steel reinforcement cage.
The conventional hoisting method has the following defects: the resultant force center point of the sling of the main crane is far away from the gravity center of the reinforcement cage, the weight share of the reinforcement cage is less, the advantage of large lifting capacity cannot be exerted in the double-crane lifting crane, and meanwhile, the auxiliary crane is required to have large lifting capacity; secondly, a certain length range below the top of the reinforcement cage is an area with the largest and most concentrated load, and the reinforcement cage is often provided with main reinforcement reinforcing ribs, horizontal reinforcement encryption, embedded parts and the like. The bending moment and the deflection of the load concentration area are large during hoisting, so that the deformation of the reinforcement cage is easily caused, and even the accident of the reinforcement cage scattering occurs in serious cases. The length of the steel reinforcement cage capable of being lifted is limited, and the overlong steel reinforcement cage is often hoisted section by section, so that the construction process is complex and the construction efficiency is low.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a hoisting method of an underground continuous wall reinforcement cage, which adopts secondary conversion, is safer in hoisting process and higher in work efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a hoisting method for a reinforcement cage of an underground continuous wall is characterized by comprising the following steps:
step 1: the main hoisting and the auxiliary hoisting are in place, the main hoisting cable and the auxiliary hoisting cable are installed, all conversion hoisting cables are installed, a first hoisting point of the main hoisting is fixed on the back surface of the reinforcement cage, and a second hoisting point of the main hoisting is fixed on the front surface of the reinforcement cage, so that the hoisting preparation work is completed;
step 2: the double-crane lifting crane lifts the reinforcement cage off the ground, after the reinforcement cage is lifted to a height of more than 0.3 m, the main crane is lifted continuously until the reinforcement cage is completely upright, and the auxiliary crane is removed;
and step 3: moving the main sling load to a position where the reinforcement cage enters the groove, and lowering the reinforcement cage; when the steel bar cage is placed to a second hoisting point of the main crane, the steel bar cage is temporarily placed on the guide wall by the placing section steel, and the sling of the main crane is loosened and connected with the first conversion sling;
and 4, step 4: and continuously transferring to the first lifting point of the main crane, temporarily placing again, connecting the sling of the main crane and the second conversion sling, gradually transferring the steel reinforcement cage, and repairing the horizontal rib in the horizontal rib area after repair welding to finish hoisting.
The invention has the beneficial effects that: firstly, the position of a main hoisting point is lowered to be closer to the gravity center of a steel reinforcement cage, more weight is borne during double-crane hoisting, and meanwhile, the load of an auxiliary hoisting is reduced, so that the auxiliary hoisting with smaller tonnage can be selected, and the cost is saved; stress conditions of a load concentration area are improved, bending moment and deflection are reduced, and hoisting safety is facilitated; compared with the conventional method, the steel reinforcement cage with longer length can be hoisted at one time, and the work efficiency is improved; fourthly, secondary conversion is adopted, the first conversion sling is connected with the second hoisting point rope head of the main crane for the first time, the second conversion sling is connected with the first hoisting point rope head of the main crane for the second time, and finally hoisting is finished; performing notch post-treatment on the horizontal rib at the upper layer from the height level of the first horizontal rib to the first hoisting point of the main crane, so as to reserve a channel for the sling of the first hoisting point of the main crane in the process of horizontally rotating and erecting the reinforcement cage; sixthly, reinforcing the cage top hanging ribs in order to bear the weight of the conversion sling.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a conventional steel reinforcement cage double-crane lifting method for lifting a main crane at 4 points and an auxiliary crane at 6 points;
FIG. 2 is a schematic view showing the working conditions of horizontal rotation and vertical rotation of a reinforcement cage and conversion of a sling in the conventional double-machine lifting process of the reinforcement cage;
FIG. 3 is a schematic perspective view of a preparation for hoisting an underground continuous wall reinforcement cage according to the present invention;
fig. 4 is a schematic diagram of a double-machine lifting process for hoisting an underground continuous wall reinforcement cage provided by the invention;
FIG. 5 is a schematic view of a double-machine lifting process for hoisting an underground continuous wall reinforcement cage according to the present invention;
FIG. 6 is a schematic view of a double-machine lifting process for hoisting an underground continuous wall reinforcement cage according to the present invention;
FIG. 7 is a schematic diagram of a secondary conversion process of a main sling for hoisting a reinforcement cage of an underground continuous wall provided by the invention;
FIG. 8 is a schematic diagram of a secondary conversion process of a main sling for hoisting a reinforcement cage of an underground continuous wall provided by the invention;
FIG. 9 is a schematic diagram of a secondary conversion process of a main sling for hoisting a reinforcement cage of an underground continuous wall provided by the invention;
description of reference numerals:
the device comprises a main lifting hook 1, an auxiliary lifting hook 2, a conversion sling 3, a first laying point 4, a cage top lifting ring 5, a main lifting second lifting point 6, a second laying point 7, a main lifting first lifting point 8, a reinforcing lifting rib 9, a second conversion sling 10, a first conversion sling 11, a main lifting sling 12, a laying section steel 13, a guide wall 14 and a rear water replenishing flat rib area 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 3-9, a method for hoisting a reinforcement cage of an underground continuous wall comprises the following steps:
step 1: the main hoisting and the auxiliary hoisting are in place, the main hoisting cable and the auxiliary hoisting cable are installed, each conversion hoisting cable 3 is installed, the first hoisting point 8 of the main hoisting is fixed on the back surface of the steel reinforcement cage, and the second hoisting point 6 of the main hoisting is fixed on the front surface of the steel reinforcement cage, so that the hoisting preparation work is completed;
step 2: the double-crane lifting crane lifts the reinforcement cage away from the ground, and as the lifting point moves downwards, the resultant force center of the main crane is closer to the integral gravity center of the reinforcement cage, so that the load proportion born during horizontal lifting is improved, and the bending moment and the deflection of the reinforcement cage are reduced; after the steel bar cage rises to a height of more than 0.3 m, the main crane continues to lift until the steel bar cage is completely upright, and the auxiliary crane is withdrawn; in the process of horizontal rotation and vertical rotation, a first lifting point 8 of a main crane is positioned on the back of a reinforcement cage, a sling 12 of the main crane rotates around the first lifting point 8 of the main crane, a channel needs to be reserved on a rotating path, and a horizontal rib which hinders the rotation of the sling is subjected to post-compensation treatment when the reinforcement cage is put into a groove and is placed to a notch;
and step 3: moving the main sling load to a position where the reinforcement cage enters the groove, and lowering the reinforcement cage; when the steel reinforcement cage is lowered to the second hoisting point 6 of the main crane, the steel reinforcement cage is temporarily placed on the guide wall 14 by the placing section steel 13, and the main crane sling 12 is loosened and connected with the first conversion sling 113;
and 4, step 4: and continuously lowering the steel reinforcement cage to the first lifting point 8 of the main crane, temporarily placing the steel reinforcement cage again, connecting the main crane sling 12 with the second conversion sling 103, gradually lowering the steel reinforcement cage, and repairing the horizontal reinforcement in the horizontal reinforcement area 15 after repair welding to finish hoisting.
The invention has the beneficial effects that: firstly, the position of a main hoisting point is lowered to be closer to the gravity center of a steel reinforcement cage, more weight is borne during double-crane hoisting, and meanwhile, the load of an auxiliary hoisting is reduced, so that the auxiliary hoisting with smaller tonnage can be selected, and the cost is saved; stress conditions of a load concentration area are improved, bending moment and deflection are reduced, and hoisting safety is facilitated; compared with the conventional method, the steel reinforcement cage with longer length can be hoisted at one time, and the work efficiency is improved; fourthly, secondary conversion is adopted, the first conversion sling 113 is connected with the rope end of the second hoisting point 6 of the main crane for the first time, the second conversion sling 103 is connected with the rope end of the first hoisting point 8 of the main crane for the second time, and finally the hoisting is finished; performing notch post-treatment on the horizontal rib at the upper layer from the height level of the first horizontal rib to the first lifting point 8 of the main crane, so as to reserve a channel for the sling of the first lifting point 8 of the main crane in the process of horizontally rotating and standing the reinforcement cage; sixthly, reinforcing the cage top hanging rib in order to bear the weight of the conversion sling 3.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (1)
1. A hoisting method for a reinforcement cage of an underground continuous wall is characterized by comprising the following steps:
step 1: the main hoisting and the auxiliary hoisting are in place, the main hoisting cable and the auxiliary hoisting cable are installed, all conversion hoisting cables are installed, a first hoisting point of the main hoisting is fixed on the back surface of the reinforcement cage, and a second hoisting point of the main hoisting is fixed on the front surface of the reinforcement cage, so that the hoisting preparation work is completed;
step 2: the double-crane lifting crane lifts the reinforcement cage off the ground, after the reinforcement cage is lifted to a height of more than 0.3 m, the main crane is lifted continuously until the reinforcement cage is completely upright, and the auxiliary crane is removed;
and step 3: moving the main sling load to a position where the reinforcement cage enters the groove, and lowering the reinforcement cage; when the steel bar cage is placed to a second hoisting point of the main crane, the steel bar cage is temporarily placed on the guide wall by the placing section steel, and the sling of the main crane is loosened and connected with the first conversion sling;
and 4, step 4: and continuously transferring to the first lifting point of the main crane, temporarily placing again, connecting the sling of the main crane and the second conversion sling, gradually transferring the steel reinforcement cage, and repairing the horizontal rib in the horizontal rib area after repair welding to finish hoisting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298269.4A CN112408197A (en) | 2020-11-19 | 2020-11-19 | Hoisting method for reinforcement cage of underground continuous wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298269.4A CN112408197A (en) | 2020-11-19 | 2020-11-19 | Hoisting method for reinforcement cage of underground continuous wall |
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| Publication Number | Publication Date |
|---|---|
| CN112408197A true CN112408197A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011298269.4A Pending CN112408197A (en) | 2020-11-19 | 2020-11-19 | Hoisting method for reinforcement cage of underground continuous wall |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338295A (en) * | 2021-06-21 | 2021-09-03 | 中铁十二局集团有限公司 | Construction method of subway station deep foundation pit under water-rich geological condition |
| CN113353782A (en) * | 2021-06-08 | 2021-09-07 | 中铁四局集团第五工程有限公司 | Low-clearance ground wall-connected reinforcement cage rapid hoisting construction method |
| CN113756516A (en) * | 2021-09-15 | 2021-12-07 | 中铁隆工程集团有限公司 | Steel reinforcement cage and hoisting construction method thereof |
| CN115450200A (en) * | 2022-10-21 | 2022-12-09 | 中交二航局第四工程有限公司 | Sectional installation tool and construction method for socket type joint of ultra-deep diaphragm wall box |
-
2020
- 2020-11-19 CN CN202011298269.4A patent/CN112408197A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353782A (en) * | 2021-06-08 | 2021-09-07 | 中铁四局集团第五工程有限公司 | Low-clearance ground wall-connected reinforcement cage rapid hoisting construction method |
| CN113338295A (en) * | 2021-06-21 | 2021-09-03 | 中铁十二局集团有限公司 | Construction method of subway station deep foundation pit under water-rich geological condition |
| CN113756516A (en) * | 2021-09-15 | 2021-12-07 | 中铁隆工程集团有限公司 | Steel reinforcement cage and hoisting construction method thereof |
| CN115450200A (en) * | 2022-10-21 | 2022-12-09 | 中交二航局第四工程有限公司 | Sectional installation tool and construction method for socket type joint of ultra-deep diaphragm wall box |
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Application publication date: 20210226 |