CN114541442A - Method for mounting inner support of lock catch steel pipe or steel sheet pile cofferdam - Google Patents
Method for mounting inner support of lock catch steel pipe or steel sheet pile cofferdam Download PDFInfo
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- CN114541442A CN114541442A CN202210337795.XA CN202210337795A CN114541442A CN 114541442 A CN114541442 A CN 114541442A CN 202210337795 A CN202210337795 A CN 202210337795A CN 114541442 A CN114541442 A CN 114541442A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 123
- 239000010959 steel Substances 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 229910001204 A36 steel Inorganic materials 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 139
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a method for installing an inner support of a lock catch steel pipe or steel sheet pile cofferdam, which comprises the steps of manufacturing an upper layer inner support and a lower layer inner support; assembling the lower-layer inner support and the guard rail, installing a lower-layer hanging and limiting system, and integrally lowering the lower-layer inner support; assembling an upper-layer inner support and a protective guard, installing an upper-layer hanging and limiting system, and integrally lowering the upper-layer inner support; and (4) reinforcing the upper and lower layers of inner supports, and dismantling the upper and lower layers of hanging and limiting systems. Two-layer interior support adopts the mill's preparation and splices in advance, high accuracy, and bracket intensity, rigidity is big, with the lug on the steel casing adoption round pin hub connection, the installation with demolish the number of times few, it is convenient to be under construction, it is controllable to support to assemble the quality on the bracket in, adopt two track loop wheel machines successive layer to wholly transfer, utilize temporarily to hang, spacing system is fixed, it is convenient to be under construction, reduce the safety risk, and interior support is used as hasp steel pipe or steel sheet pile to insert and beats the location nose girder, interim nose girder input has been reduced, it is safe and the quality to change in control construction, and shorten construction cycle.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a method for installing an inner support of a lock catch steel pipe or steel sheet pile cofferdam.
Background
With the rapid development of economy and society in China, the scale of infrastructure construction is continuously increased, the bridge construction is different day by day, and the underwater foundation is also a countless number. The lock catch steel pipe or steel plate pile cofferdam is composed of lock catch steel pipes or steel plate piles and an inner support, and water and soil can be effectively prevented from entering the building position of a building. The lock catch steel pipe or steel sheet pile cofferdam has high strength, is easy to be driven into a hard soil layer, can be constructed in deep water, has less material consumption and high recovery rate, and is quicker to construct. When the common underwater bearing platform is constructed, the application is extremely wide.
When the inner support of the lock catch steel pipe or steel plate pile cofferdam is constructed by adopting a conventional method, a temporary positioning guide beam is generally installed firstly, the lock catch steel pipe or steel plate pile is inserted and punched, and the inner support is installed at the water pumping edge behind the back cover of the cofferdam. The construction by the conventional method has the following defects:
1. before inserting and driving the lock catch steel pipe or the steel plate pile, the overwater temporary positioning guide beam and the protective handrail need to be installed firstly, the positioning effect of the single-layer guide beam is poor, the inserting and driving precision of the lock catch steel pipe or the steel plate pile is difficult to control, the material input amount is large, and after the inner support is installed, the temporary positioning guide beam and the protective handrail need to be dismantled;
2. along with the pumping of water in the cofferdam, the difference between the internal and external water heads is increased, and the internal support is not installed at the moment and cannot participate in stress, so that the water pressure borne by the lock catch steel pipe or the steel sheet pile is gradually increased, the deformation quantity is increased, the water leakage at the lock catch is increased, and the cofferdam is difficult to leak;
3. when the cofferdam pumps water to the elevation about 1m below the bottom of the upper-layer inner support and the lower-layer inner support, the water pumping is suspended, the upper-layer inner support and the lower-layer inner support are installed layer by layer, and more personnel construction channels are required to be added for operation in the cofferdam;
4. the inner supports are installed in an order from top to bottom, when the inner supports are installed, most rod pieces are influenced by the upper positioning guide beam or the installed inner supports, cannot be directly hoisted to a designed position by using a crane, and need to be manually or hoisted in place by using measures such as a hoist and the like; meanwhile, due to the influence of the steel pile casing and the lock catch steel pipe or steel sheet pile, the operation space is narrow, part of lock catches have water leakage, and in order to ensure the construction safety and smooth installation of the inner support, the inner support needs to be manufactured into small segments when being manufactured in a factory, and a crane is adopted to be assembled and installed section by section on site;
5. when a hoisting machinery driver works, the blind area is large, the hoisting times are many, and the hoisting difficulty is large; the inner support installation personnel have the disadvantages of difficult operation, high safety risk, slow construction speed and difficult control of construction quality.
Disclosure of Invention
The invention aims to provide the method for installing the inner support of the lock catch steel pipe or steel sheet pile cofferdam, which has the advantages of convenient and quick construction, small construction investment, small safety risk and controllable quality.
The purpose of the invention is realized as follows:
a mounting method for an inner support of a lock catch steel pipe or steel sheet pile cofferdam is characterized in that: the method comprises the following steps:
A. manufacturing an upper layer inner support and a lower layer inner support in a segmented manner;
B. assembling the lower-layer inner support, installing a lower-layer protective railing, installing a lower-layer hanging and limiting system, and integrally lowering the lower-layer inner support; wherein: the lower layer hanging and limiting system comprises a lower layer hanging steel wire rope, a lower layer transverse limiting system and a lower layer vertical limiting system;
C. assembling an upper-layer inner support, installing an upper-layer protective railing, installing an upper-layer hanging and limiting system, and integrally lowering the upper-layer inner support; wherein: the upper layer hanging and limiting system comprises an upper layer hanging steel wire rope, an upper layer transverse limiting system, an upper layer vertical limiting system and an upper layer oblique limiting system;
D. and (4) reinforcing the lower-layer inner support and the upper-layer inner support, and dismantling the lower-layer hanging steel wire rope, the lower-layer transverse limiting, the upper-layer hanging steel wire rope, the upper-layer transverse limiting, the vertical limiting and the oblique limiting to complete construction.
In step A, when the upper support and the lower support are manufactured in a segmented mode, the large segment is manufactured as far as possible on the premise that hoisting and transportation are met, and meanwhile the upper hanging lugs, the upper integral lowering lugs, the lower hanging lugs and the lower integral lowering lugs are welded on the upper support and the lower support.
In step B, assemble the lower floor and support, install the protection railing of lower floor, install the lower floor and hang and spacing system, wholly transfer the lower floor to support and specifically include:
a. welding an upper bracket lifting lug (serving as an upper internal support hanging lug) and a lower bracket lifting lug (serving as a lower internal support hanging lug) on the steel casing, and hinging the inner support assembled bracket with the upper bracket lifting lug (serving as the upper internal support hanging lug) and the lower bracket lifting lug (serving as the lower internal support hanging lug) by using a pin shaft; welding the sections of the lower-layer inner support, and welding the lower-layer protective railing on the top of the lower-layer inner support by adopting an A36 steel pipe;
b. welding a lower layer transverse limit of HW300 multiplied by 300 on the side surface of the lower layer inner support, wherein the distance between the lower layer transverse limit and the steel casing is 3 cm;
c. the side surface of the lower-layer inner support is welded with the lower end of a vertical limit made of HW440 x 300 section steel, the bottom elevation of the vertical limit is consistent with the bottom elevation of the lower-layer inner support, and the top elevation of the vertical limit is consistent with the top elevation of the upper-layer inner support;
d. one end of the lower layer hanging steel wire rope is connected with a lower bracket lifting lug (also serving as a lower layer inner support hanging lug) on the steel casing by a pin shaft, and the other end of the lower layer hanging steel wire rope is connected with the lower layer hanging lug on the lower layer inner support by a shackle;
e. and (4) simultaneously hoisting the lower-layer inner support by using two crawler cranes, dismantling the inner support and assembling the bracket, and integrally lowering the bracket to the designed elevation.
In step C, assemble upper strata support, install upper strata and prevent guardrail bar, install the upper strata and hang and spacing system, wholly transfer the interior support of upper strata and specifically include:
a. installing an inner support assembling bracket, assembling an upper layer inner support, installing an upper layer hanging steel wire rope and upper layer transverse limiting, integrally hoisting the upper layer inner support, removing the inner support assembling bracket, and integrally lowering to a designed elevation;
b. the side surface of the upper layer inner support is welded with the upper end of the vertical limit of HW440 multiplied by 300, namely the vertical limit is used for connecting the lower layer inner support and the upper layer inner support;
c. the inclined position limitation of HW300 multiplied by 300 is respectively welded with the top of the upper inner support and the steel casing.
In step D, the upper support and the lower support are reinforced, and the upper hanging and limiting system and the lower hanging and limiting system are dismantled, and the concrete steps include:
a. inserting and driving lock catch steel pipes or steel sheet piles by using the upper-layer inner supports and the lower-layer inner supports as positioning guide beams, and sealing the bottom and pumping water by the cofferdam;
b. checking the close contact condition of the upper inner support and the lower inner support with the inner wall of the lock catch steel pipe or the steel sheet pile, and adopting a small steel member for filling and welding and fixing the positions with gaps;
c. an upper layer supporting bracket and a lower layer supporting bracket are respectively installed at the bottoms of the upper layer inner support and the lower layer inner support, the upper layer supporting bracket and the lower layer supporting bracket are respectively and firmly welded with the inner wall of the lock catch steel pipe or the steel sheet pile, and the upper layer hanging and limiting system and the lower layer hanging and limiting system are disassembled.
The invention adopts the sectional production of the inner support; assembling the lower-layer inner support, installing a lower-layer protective railing, installing a lower-layer hanging and limiting system, and integrally lowering the lower-layer inner support; assembling an upper-layer inner support, installing an upper-layer protective railing, installing an upper-layer hanging and limiting system, and integrally lowering the upper-layer inner support; and reinforcing the inner support of the two layers, and removing the hanging and limiting systems of the two layers.
The inner supports are manufactured in large sections in a factory, pre-assembled in the factory, high in machining precision, high in strength and rigidity of the inner support assembled corbels, connected with the lifting lugs on the steel casing through the pin shafts, few in installation and removal times, convenient and fast to construct, high in assembling speed of the two layers of inner supports on the corbels, controllable in quality, capable of being integrally lowered layer by adopting two crawler cranes, reducing the operation time in the cofferdam, fixed through the temporary hanging and limiting systems, convenient and fast to construct, and capable of reducing construction safety risks.
Therefore, compared with the prior art, the invention has the advantages that:
(1) the inserting and driving of the lock catch steel pipe or the steel plate pile uses the upper and lower inner supports as positioning guide beams, so that the material investment is less, and the inserting and driving precision of the lock catch steel pipe or the steel plate pile is easier to control;
(2) when the cofferdam pumps water, the water pressure is transmitted to the two layers of inner supports by the lock catch steel pipes or the steel plate piles, the deformation quantity of the lock catch steel pipes or the steel plate piles is smaller, and the waterproof effect of the cofferdam is better;
(3) the assembly of the two layers of inner supports is carried out on the water surface, the operation space is not limited, the two layers of inner supports can be processed into a large section when being manufactured in a factory, the field assembly is convenient and rapid, the safety risk is small, and the quality is controllable;
(4) after the inner supports are assembled on the inner support assembling bracket, the two crawler cranes are integrally lifted and lowered to the designed elevation, the hanging and limiting systems are temporarily fixed, after the lock catch steel pipes or steel sheet piles are inserted, the cofferdam is sealed and pumped, the inner supports are inspected and fixed, the upper hanging and limiting systems and the lower hanging and limiting systems can be detached, and the mechanical operation time, the operation time in the cofferdam and the whole construction period are effectively shortened.
The invention is more suitable for the construction requirement of the inner support installation of the lock catch steel pipe or steel sheet pile cofferdam of the underwater bearing platform.
Drawings
FIG. 1 is a floor plan view of a lifting lug in an embodiment of the present invention;
FIG. 2 is a schematic view of an installation elevation of an inner support assembly bracket according to an embodiment of the invention;
FIG. 3 is a facing view of an assembled inner support and installed guard rail in an embodiment of the present invention;
FIG. 4 is a plan view of an inner support restraint and sectional corbel arrangement in an embodiment of the present invention;
FIG. 5 is a schematic view of an integral lower inner support lowering elevation in an embodiment of the present invention;
FIG. 6 is a schematic view of an integral lowering elevation of the upper inner support in an embodiment of the present invention;
FIG. 7 is a floor plan view of the completed installation of the inner support in an embodiment of the present invention;
in the figure: 1-lower layer hanging lugs, 2-upper layer hanging lugs, 3-lower layer integral lowering lugs, 4-upper layer integral lowering lugs, 5-upper bracket lugs (and upper layer inner supporting hanging lugs), 6-lower bracket lugs (and lower layer inner supporting hanging lugs), 7-steel casing, 8-lower layer inner supports, 9-upper layer inner supports, 10-trestle, 11-inner supporting assembled bracket, 12-crawler crane, 13-lower layer guard rail, 14-oblique limit, 15-vertical limit, 16-lower layer transverse limit, 17-upper layer transverse limit, 18-lower layer hanging steel wire rope, 19-integral lowering steel wire rope, 20-upper layer hanging steel wire rope, 21-upper layer guard rail, 22-lock catch steel pipe or steel sheet pile, 23-back cover concrete, 24-lower layer supporting bracket and 25-upper layer supporting bracket.
Detailed Description
The present invention will be described in further detail with reference to the following drawings in conjunction with embodiments.
The embodiment of the invention provides a method for installing an inner support of a lock catch steel pipe or steel sheet pile cofferdam, which comprises the following steps of:
A. before the construction of the inner support of the lock catch steel pipe or steel sheet pile cofferdam is carried out, a drilling platform is dismantled, trestles 10 on two sides are reserved as operation platforms, and steel pile casings 7 are cut to be at a uniform elevation to serve as a bottom sealing platform foundation;
B. on the premise of guaranteeing hoisting and transportation, the lower-layer inner support 8 and the upper-layer inner support 9 are reasonably divided into a plurality of large sections, so that the field operation amount is reduced, matching processing is carried out among the sections during in-factory processing, pre-assembly is carried out in the process, the matching precision is strictly controlled, and the on-site assembly of the inner supports is guaranteed to meet the construction requirements; as shown in fig. 2, a lower layer hanging lug 1 and a lower layer integral lowering lug 3 are welded on the top surface of a lower layer support 8, an upper layer hanging lug 2 and an upper layer integral lowering lug 4 are welded on the top surface of an upper layer support 9, an upper bracket lug (also serving as an upper layer support hanging lug) 5, a lower bracket lug (also serving as a lower layer inner support hanging lug) 6, a lower layer transverse limit 16, an upper layer transverse limit 17, an oblique limit 14 and a vertical limit 15 are all processed in a factory, and after the processing is finished, the processed materials are transported to a construction site by a transport vehicle;
C. the steps of installing the upper inner support 8 and the lower inner support 9 performed on the construction site include the following:
a. support 8 in assembling lower floor, installation lower floor prevents guardrail bar 13, and installation lower floor hangs and spacing system, wholly transfers support 8 in lower floor:
welding an upper bracket lug (serving as an upper-layer support hanging lug) 5 and a lower bracket lug (serving as a lower-layer support hanging lug) 6 on a steel casing 7, hinging an inner support assembly bracket 11 with the upper bracket lug (serving as an upper-layer support hanging lug) 5 and an upper preformed hole of the lower bracket lug (serving as a lower-layer inner support hanging lug) 6 by using a pin shaft, measuring and lofting the side line of the lower-layer inner support 8 after the inner support assembly bracket 11 is installed, hoisting each section of the lower-layer inner support 8 onto the inner support assembly bracket 11 by using a crawler crane 12 for assembly and welding, and installing a lower-layer protective railing 13 at the same time;
a lower layer transverse limiting 16 made of section steel is welded on the side surface of the lower layer inner support 8, and the distance between the lower layer transverse limiting 16 and the steel casing 7 is 3 cm;
as shown in fig. 4 and 5, the side surface of the lower-layer inner support 8 is welded with the lower end of a vertical limit 15 made of section steel;
one end of a lower layer hanging steel wire rope 18 is connected with a lower preformed hole of a lower bracket lifting lug (serving as a lower layer inner supporting hanging lifting lug) 6 through a pin shaft, and the other end of the lower layer hanging steel wire rope 18 is connected with a lower layer hanging lifting lug 1 on a lower layer inner support 8 through a shackle;
as shown in fig. 6, the integral lowering steel wire rope 19 is connected with the integral lowering lifting lug 3 at the lower layer by shackle, the inner support 8 at the lower layer is lifted by two crawler cranes 12 at the same time, the inner support assembly bracket 11 is removed, and the integral lowering is carried out to the designed elevation;
b. support 9 in assembling the upper strata, install upper strata and prevent guardrail bar 21, install the upper strata and hang and spacing system, wholly transfer upper strata support 9:
installing an inner support assembling bracket 11, assembling an upper layer inner support 9, installing an upper layer hanging steel wire rope 20 and an upper layer transverse limiting 17, integrally hoisting the upper layer inner support 9, removing the inner support assembling bracket 11, and integrally lowering to a designed elevation;
as shown in fig. 4 and 6, the side surface of the upper inner support 9 is welded with the upper end of the vertical limit 15;
as shown in fig. 4 and 6, an oblique limit 14 made of section steel is respectively welded with the top of the upper inner support 9 and the steel casing 7;
c. support 8, the internal support 9 reinforcement of upper strata in the lower floor, the upper strata is hung and is demolishd with spacing system, lower floor's hanging and spacing system:
inserting and driving a lock catch steel pipe or steel sheet pile 22 by using the lower-layer inner support 8 and the upper-layer inner support 9 as positioning guide beams, pouring underwater bottom sealing concrete 23 into the cofferdam, and pumping water from the cofferdam after the bottom sealing concrete 23 reaches the designed strength;
checking the close contact condition of the lower-layer inner support 8 and the upper-layer inner support 9 with the inner wall of the lock catch steel pipe or steel plate pile 15, and adopting a small-sized steel member for making a pad to be compact and firmly welded at the position with a gap;
and (3) respectively installing a lower-layer support bracket 24 and an upper-layer support bracket 25 at the bottoms of the lower-layer inner support 8 and the upper-layer inner support 9, firmly welding the lower-layer support bracket 24 and the upper-layer support bracket 25 with the inner wall of the lock catch steel pipe or steel plate pile 22, and dismantling the hanging and limiting system to complete construction.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (5)
1. The mounting method of the inner support of the lock catch steel pipe or steel sheet pile cofferdam is characterized in that: the method comprises the following steps:
A. manufacturing an upper layer inner support and a lower layer inner support in a segmented manner;
B. assembling the lower-layer inner support, installing a lower-layer protective railing, installing a lower-layer hanging and limiting system, and integrally lowering the lower-layer inner support; wherein: the lower layer hanging and limiting system comprises a lower layer hanging steel wire rope, a lower layer transverse limiting system and a lower layer vertical limiting system;
C. assembling an upper-layer inner support, installing an upper-layer protective railing, installing an upper-layer hanging and limiting system, and integrally lowering the upper-layer inner support; wherein: the upper layer hanging and limiting system comprises an upper layer hanging steel wire rope, an upper layer transverse limiting device, a vertical limiting device and an inclined limiting device;
D. and (4) reinforcing the lower-layer inner support and the upper-layer inner support, and dismantling the lower-layer hanging steel wire rope, the lower-layer transverse limiting, the upper-layer hanging steel wire rope, the upper-layer transverse limiting, the vertical limiting and the oblique limiting to complete construction.
2. The method for installing the inner support in the lock catch steel pipe or steel plate pile cofferdam according to claim 1, characterized in that: in the step A, when the inner supports are manufactured in a segmented mode, the inner supports are manufactured into large segments as much as possible on the premise of meeting the requirements of hoisting and transportation, and meanwhile the inner supports are welded on the distribution beam to integrally lower the lifting lugs and hang the lifting lugs.
3. The method for installing the inner support in the lock catch steel pipe or steel plate pile cofferdam according to claim 1, characterized in that: in step B, assemble the lower floor and support, install the protection railing of lower floor, install the lower floor and hang and spacing system, wholly transfer the lower floor to support and specifically include:
a. welding an upper bracket lifting lug (serving as an upper internal support hanging lug) and a lower bracket lifting lug (serving as a lower internal support hanging lug) on the steel casing, and hinging the inner support assembled bracket with the upper bracket lifting lug (serving as the upper internal support hanging lug) and the lower bracket lifting lug (serving as the lower internal support hanging lug) by using a pin shaft; welding the sections of the lower-layer inner support, and welding the lower-layer protective railing on the top of the lower-layer inner support by adopting an A36 steel pipe;
b. welding a lower layer transverse limit of HW300 multiplied by 300 on the side surface of the lower layer inner support, wherein the distance between the lower layer transverse limit and the steel casing is 3 cm;
c. the side surface of the lower-layer inner support is welded with the lower end of a vertical limit made of HW440 x 300 section steel, the bottom elevation of the vertical limit is consistent with the bottom elevation of the lower-layer inner support, and the top elevation of the vertical limit is consistent with the top elevation of the upper-layer inner support;
d. one end of the lower layer hanging steel wire rope is connected with a lower bracket lifting lug (also serving as a lower layer inner support hanging lug) on the steel casing by a pin shaft, and the other end of the lower layer hanging steel wire rope is connected with the lower layer hanging lug on the lower layer inner support by a shackle;
e. and (4) simultaneously hoisting the lower-layer inner support by using two crawler cranes, dismantling the inner support and assembling the bracket, and integrally lowering the bracket to the designed elevation.
4. The method for installing the inner support in the lock catch steel pipe or steel plate pile cofferdam according to claim 1, characterized in that: in step C, assemble upper strata support, install upper strata and prevent guardrail bar, install the upper strata and hang and spacing system, wholly transfer the interior support of upper strata and specifically include:
a. installing an inner support assembling bracket, assembling an upper layer inner support, installing an upper layer hanging steel wire rope and upper layer transverse limiting, integrally hoisting the upper layer inner support, removing the inner support assembling bracket, and integrally lowering to a designed elevation;
b. the side surface of the upper layer inner support is welded with the upper end of the vertical limit of HW440 multiplied by 300, namely the vertical limit is used for connecting the lower layer inner support and the upper layer inner support;
c. the inclined position limitation of HW300 multiplied by 300 is respectively welded with the top of the upper inner support and the steel casing.
5. The method for installing the inner support in the lock catch steel pipe or steel plate pile cofferdam according to claim 1, characterized in that: in step D, the upper support and the lower support are reinforced, and the upper hanging and limiting system and the lower hanging and limiting system are dismantled, and the concrete steps include:
a. inserting and driving lock catch steel pipes or steel sheet piles by using the upper-layer inner supports and the lower-layer inner supports as positioning guide beams, and sealing the bottom and pumping water by the cofferdam;
b. checking the close contact condition of the upper inner support and the lower inner support with the inner wall of the lock catch steel pipe or the steel sheet pile, and adopting a small steel member for filling and welding and fixing the positions with gaps;
c. an upper layer supporting bracket and a lower layer supporting bracket are respectively installed at the bottoms of the upper layer inner support and the lower layer inner support, the upper layer supporting bracket and the lower layer supporting bracket are respectively and firmly welded with the inner wall of the lock catch steel pipe or the steel sheet pile, and the upper layer hanging and limiting system and the lower layer hanging and limiting system are disassembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210337795.XA CN114541442B (en) | 2022-04-01 | 2022-04-01 | Installation method of lock catch steel pipe or steel sheet pile cofferdam inner support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210337795.XA CN114541442B (en) | 2022-04-01 | 2022-04-01 | Installation method of lock catch steel pipe or steel sheet pile cofferdam inner support |
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| Publication Number | Publication Date |
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| CN114541442A true CN114541442A (en) | 2022-05-27 |
| CN114541442B CN114541442B (en) | 2023-12-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008297749A (en) * | 2007-05-30 | 2008-12-11 | Zenitaka Corp | Cofferdam construction method, cut-off structure, and cofferdam structure |
| CN105421473A (en) * | 2015-11-02 | 2016-03-23 | 中铁大桥局集团有限公司 | Double-wall opening-sealed steel sleeve box cofferdam and construction method |
| CN106958253A (en) * | 2017-05-03 | 2017-07-18 | 中交第二航务工程局有限公司 | A kind of new type of deep-water combined steel plate pile cofferdam construction method |
| CN110359476A (en) * | 2019-07-04 | 2019-10-22 | 中铁七局集团有限公司 | A kind of construction method of steel sheet-pile cofferdam inner support and drilled pile steel pile casting installation operation platform |
| CN111980019A (en) * | 2020-08-21 | 2020-11-24 | 中铁四局集团有限公司 | Construction method of steel pipe pile cofferdam for locking notch of main bridge bearing platform of super-large bridge |
| CN112459090A (en) * | 2020-11-11 | 2021-03-09 | 江苏玖沐精工装备科技有限公司 | Novel steel hanging box cofferdam construction method based on Larsen steel sheet pile |
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2022
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008297749A (en) * | 2007-05-30 | 2008-12-11 | Zenitaka Corp | Cofferdam construction method, cut-off structure, and cofferdam structure |
| CN105421473A (en) * | 2015-11-02 | 2016-03-23 | 中铁大桥局集团有限公司 | Double-wall opening-sealed steel sleeve box cofferdam and construction method |
| CN106958253A (en) * | 2017-05-03 | 2017-07-18 | 中交第二航务工程局有限公司 | A kind of new type of deep-water combined steel plate pile cofferdam construction method |
| CN110359476A (en) * | 2019-07-04 | 2019-10-22 | 中铁七局集团有限公司 | A kind of construction method of steel sheet-pile cofferdam inner support and drilled pile steel pile casting installation operation platform |
| CN111980019A (en) * | 2020-08-21 | 2020-11-24 | 中铁四局集团有限公司 | Construction method of steel pipe pile cofferdam for locking notch of main bridge bearing platform of super-large bridge |
| CN112459090A (en) * | 2020-11-11 | 2021-03-09 | 江苏玖沐精工装备科技有限公司 | Novel steel hanging box cofferdam construction method based on Larsen steel sheet pile |
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