CN109137751A - Based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure - Google Patents

Based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure Download PDF

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Publication number
CN109137751A
CN109137751A CN201811243687.6A CN201811243687A CN109137751A CN 109137751 A CN109137751 A CN 109137751A CN 201811243687 A CN201811243687 A CN 201811243687A CN 109137751 A CN109137751 A CN 109137751A
Authority
CN
China
Prior art keywords
cofferdam
pier
water
caisson
steel construction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811243687.6A
Other languages
Chinese (zh)
Inventor
孙业发
王春冉
张全林
薛春刚
马云洁
罗一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
No1 Engineering Compay Ltd Of Cccc First Barbor Engineering Co Ltd
CCCC First Harbor Engineering Co Ltd
Original Assignee
No1 Engineering Compay Ltd Of Cccc First Barbor Engineering Co Ltd
CCCC First Harbor Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by No1 Engineering Compay Ltd Of Cccc First Barbor Engineering Co Ltd, CCCC First Harbor Engineering Co Ltd filed Critical No1 Engineering Compay Ltd Of Cccc First Barbor Engineering Co Ltd
Priority to CN201811243687.6A priority Critical patent/CN109137751A/en
Publication of CN109137751A publication Critical patent/CN109137751A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/02Restraining of open water
    • E02D19/04Restraining of open water by coffer-dams, e.g. made of sheet piles

Abstract

The present invention is disclosed based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure, comprising steps of 1) precast caisson, processing steel construction cylinder, steel construction cylinder is connect with caisson, is assembled into cofferdam water sealing structure;2) water sealing structure is transported to bridge pier installation site, pier pile foundation is penetrated the preformed hole on Bottom plate of sinkbox by lifting, and cofferdam water sealing structure is fallen within above simple bedding;3) underwater concrete is poured in the cabin lattice for having pile foundation preformed hole on caisson, the satisfactory backfill material of backfill density in other cabin lattice;4) after underwater concrete reaches some strength, water in steel construction cylinder is evacuated to the quasi- installation bottom absolute altitude of pier or less the position 1m;5) prefabricated pier is installed, back pouring hole is poured;6) after back pouring hole reaches design strength, to cofferdam internal water flooding, when hydraulic pressure is consistent inside and outside cofferdam, the clamp device between steel construction cylinder and caisson is removed, lifting steel construction cylinder is recycled.Present invention assembling is easy to use, adapts to various depth condition constructions.

Description

Based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure
Technical field
The present invention relates to a kind of based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure, belongs to pier in water Mounting technique field.
Background technique
Currently, pier dry method installation water sealing structure uses two kinds of sides of excessive cylinder cofferdam and double-walled fore shaft steel boxed cofferdam Formula.
Wherein, it using large cylinder cofferdam, has the disadvantage that and insufficient: 1./vibration heavy to lifting equipment waterborne and large-scale vibration Equipment requirement height is pulled out, it is costly;2. being difficult to shake into geology such as the preferable layers of sand of bearing capacity;3. technique vibration underground layer needs only Water layer need to carry out patching to original soil matter, greatly increase construction cost such as without sealing layer.
Using double-walled fore shaft steel boxed cofferdam, have the shortcomings that following and deficiency: being 1. only applicable to phytal zone construction;2. institute There is vertical fore shaft to be both needed to sealing, sealing difficulty is big;3. barrel is completely disengaged with surrounding concrete by water filling to acquire a certain degree of difficulty, It is big that difficulty is integrally extracted in cofferdam.4. easily causing local deformation in work progress, it is difficult to be combined into entirety after local deformation.
Therefore, there are very big constructional difficulties in existing pier dry method installation water sealing structure.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of based on the Shui Zhongdun for sitting bottom cofferdam water sealing structure Platform dry method mounting process, assembling is easy to use, adapts to various depth conditions constructions.
To achieve the goals above, pier dry method erector in the water based on seat bottom cofferdam water sealing structure that the present invention uses Skill, comprising the following steps:
1) bottom of steel construction cylinder, is connect with caisson by clamp device, is assembled into cofferdam by precast caisson, processing steel construction cylinder Water sealing structure;
2) by the cofferdam, water sealing structure is transported to bridge pier installation site, lifts by crane the cofferdam sealing by crane ship cooperation universal hanger Pier pile foundation is penetrated the preformed hole on Bottom plate of sinkbox by structure, and the cofferdam water sealing structure for penetrating pier pile foundation is finally fallen within letter Above easy bedding;
3) underwater concrete is poured in the cabin lattice for having pile foundation preformed hole on caisson, realizes sealing between caisson and pile foundation;It is other The satisfactory backfill material of backfill density in the lattice of cabin;
4) after underwater concrete reaches some strength, water in steel construction cylinder is evacuated to the quasi- installation bottom absolute altitude of pier or less 1m It sets, so far completes the construction of bottom-sitting type cofferdam water sealing structure;
5) prefabricated pier is installed, back pouring hole is then poured;
6) after back pouring hole reaches design strength, to cofferdam internal water flooding, when hydraulic pressure is consistent inside and outside cofferdam, steel construction cylinder is removed Clamp device between caisson, crane ship lifting steel construction cylinder are recycled, and pier installation is completed.
As an improvement, the clamp device is bolt.
Compared with prior art, the beneficial effects of the present invention are:
1) the bottom-sitting type cofferdam water sealing structure in the present invention does not need in the installation of this structure and demolishing process without being inserted into soil layer Large-scale equipment of sink/extricating oneself from a predicament and brace oneself up to action of shaking, and to soil layer without sealing requirement, also there is no the geology such as medium-sand seam to be difficult to the problem of being inserted into, because This, this structure has a clear superiority relative to large cylinder cofferdam.
2) the bottom-sitting type cofferdam water sealing structure in the present invention can be recycled after the disassembly of steel construction cylinder, and can pass through and configure The steel construction cylinder of different height adjusts cofferdam height, adapts to various depth condition constructions;In addition, only top and the bottom are grouped this structure It need to make patching at dress, be both needed to sealing, this hair relative to traditional all vertical fore shafts of double-walled fore shaft steel boxed cofferdam technique Bright sealing difficulty substantially reduces;After the present invention unclamps the clamp device between steel construction cylinder and caisson, by crane ship by steel knot Structure cylinder, which is hung, to be removed, and there is no double-walled fore shaft steel boxed cofferdam techniques to remove the big problem of difficulty.Therefore, the present invention is locked relative to double-walled Mouth steel boxed cofferdam also has a clear superiority.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
In figure: 1, universal hanger, 2, steel construction cylinder, 3, caisson, 4, underwater concrete, 5, pier pile foundation, 6, back pouring hole, 7, prefabricated Pier, 8, backfill material, 9, the position 1m below the quasi- installation bottom absolute altitude of pier.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention is carried out below further detailed It describes in detail bright.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, it is not limited to this hair Bright range.
Unless otherwise defined, all technical terms and scientific terms used herein are led with technology of the invention is belonged to The normally understood meaning of the technical staff in domain is identical, and term as used herein in the specification of the present invention is intended merely to retouch State the purpose of specific embodiment, it is not intended that in the limitation present invention.
As shown in Figure 1, based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure, comprising the following steps:
1) bottom of steel construction cylinder 2, is connect with caisson 3 by clamp device, is assembled by precast caisson 3, processing steel construction cylinder 2 Cofferdam water sealing structure plays water-stagnating effect by the antipriming between 3 exterior wall of side wall and caisson of steel construction cylinder;
2) by the cofferdam, water sealing structure is transported to bridge pier installation site, is lifted by crane the cofferdam by crane ship cooperation universal hanger 1 and is stopped Pier pile foundation 5 is penetrated the preformed hole on 3 bottom plate of caisson, the cofferdam water sealing structure for penetrating pile foundation 5 is finally fallen within letter by water-bound Above easy bedding;
3) underwater concrete 4 is poured in the cabin lattice for having pile foundation preformed hole on caisson 3, backfill density meets the requirements in other cabin lattice Backfill material 8;
4) after underwater concrete 4 reaches some strength, water in steel construction cylinder 2 is evacuated to the quasi- installation bottom absolute altitude of pier or less 1m 9 are set, the construction of bottom-sitting type cofferdam water sealing structure is so far completed;
5) prefabricated pier 7 is installed, back pouring hole 6 is then poured;
6) after back pouring hole 6 reaches design strength, to cofferdam internal water flooding, when hydraulic pressure is consistent inside and outside cofferdam, steel construction is removed Clamp device between cylinder 2 and caisson 3, crane ship lifting steel construction cylinder 2 are recycled, and pier installation is completed.
In specific work progress, the height of caisson 3 is according in sealing between caisson 3 and pier pile foundation 5 and cofferdam Structure stress under state of drawing water it needs to be determined that.
As an improvement, the clamp device is bolt.
In specific work progress, the backfill material is the material for meeting counterweight requirements under state of drawing water in cofferdam.
The present invention constitutes combined type by pile foundation in steel construction barrel and gravity caisson and caisson and sits bottom structure, and formation stops Water cofferdam.Caisson corresponds to pile foundation storehouse lattice setting preformed hole, so that caisson and pile foundation is formed entirety by pouring underwater concrete, other Storehouse lattice backfill the satisfactory backfill material of density.Overcome using pile foundation withdrawal resistance, gravity caisson and internal backfill material buoyant weight power The buoyancy of state of drawing water in cofferdam flowering structure provides dry construction operating environment for pier installation.
Wherein, the present invention overcomes buoyancy mainly to utilize pile foundation withdrawal resistance, to caisson and internal backfill material weight demands ratio Lower, caisson height is small, relatively low to foundation bearing force request under caisson.
Bottom-sitting type cofferdam water sealing structure in the present invention is not required in the installation of this structure and demolishing process without being inserted into soil layer Large-scale equipment of sink/extricating oneself from a predicament and brace oneself up to action of shaking is wanted, and to soil layer without sealing requirement, also there is no the geology such as medium-sand seam to be difficult to the problem of being inserted into, Therefore, this structure has a clear superiority relative to large cylinder cofferdam.
Bottom-sitting type cofferdam water sealing structure in the present invention can be recycled after the disassembly of steel construction cylinder, and can be by configuring not Level steel construction barrel adjusts cofferdam height, adapts to various depth condition constructions;In addition, only top and the bottom are grouped this structure It need to make patching at dress, be both needed to sealing, this hair relative to traditional all vertical fore shafts of double-walled fore shaft steel boxed cofferdam technique Bright sealing difficulty substantially reduces;After the present invention unclamps the clamp device between steel construction cylinder and caisson, by crane ship by steel knot Structure cylinder, which is hung, to be removed, and there is no double-walled fore shaft steel boxed cofferdam techniques to remove the big problem of difficulty.Therefore, the present invention is locked relative to double-walled Mouth steel boxed cofferdam also has a clear superiority.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (2)

1. based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure, which comprises the following steps:
1) precast caisson (3), processing steel construction cylinder (2) are connected the bottom of steel construction cylinder (2) and caisson (3) by clamp device It connects, is assembled into cofferdam water sealing structure;
2) by the cofferdam, water sealing structure is transported to bridge pier installation site, lifts by crane the cofferdam by crane ship cooperation universal hanger (1) Pier pile foundation (5) is penetrated the preformed hole on caisson (3) bottom plate, finally stops the cofferdam for penetrating pier pile foundation (5) by water sealing structure Water-bound is fallen within above simple bedding;
3) it pours underwater concrete (4), is realized between caisson and pile foundation only in the cabin lattice for having pile foundation preformed hole on caisson (3) Water;The satisfactory backfill material (8) of backfill density in other cabin lattice;
4) after underwater concrete (4) reaches some strength, steel construction cylinder (2) interior water is evacuated to the quasi- installation bottom absolute altitude of pier or less The construction of bottom-sitting type cofferdam water sealing structure is so far completed in the position 1m (9);
5) prefabricated pier (7) is installed, back pouring hole (6) are then poured;
6) after back pouring hole (6) reaches design strength, to cofferdam internal water flooding, when hydraulic pressure is consistent inside and outside cofferdam, steel knot is removed Clamp device between structure cylinder (2) and caisson (3), crane ship lifting steel construction cylinder (2) are recycled, and pier peace is completed Dress.
2. according to claim 1 based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure, feature exists In the clamp device is bolt.
CN201811243687.6A 2018-10-24 2018-10-24 Based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure Pending CN109137751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811243687.6A CN109137751A (en) 2018-10-24 2018-10-24 Based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811243687.6A CN109137751A (en) 2018-10-24 2018-10-24 Based on pier dry method mounting process in the water for sitting bottom cofferdam water sealing structure

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CN109137751A true CN109137751A (en) 2019-01-04

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158161A (en) * 2007-10-19 2008-04-09 山东高速集团青岛高速公路有限公司 Underwater no-bottom closing concrete boxed cofferdam and method of use thereof
CN202577325U (en) * 2012-05-16 2012-12-05 科达集团股份有限公司 Cofferdam collaborative operation device of steel pipe pile platform and steel board pile
CN104631338A (en) * 2015-02-16 2015-05-20 中交第二航务工程局有限公司 Steel boxed cofferdam and positioning construction method
JP2016079591A (en) * 2014-10-10 2016-05-16 五洋建設株式会社 Work caisson and cut-off method for the same
CN107447767A (en) * 2017-08-10 2017-12-08 重庆水利电力职业技术学院 A kind of prefabricated reinforced concrete bottom plate steel lifted trunk and its construction method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158161A (en) * 2007-10-19 2008-04-09 山东高速集团青岛高速公路有限公司 Underwater no-bottom closing concrete boxed cofferdam and method of use thereof
CN202577325U (en) * 2012-05-16 2012-12-05 科达集团股份有限公司 Cofferdam collaborative operation device of steel pipe pile platform and steel board pile
JP2016079591A (en) * 2014-10-10 2016-05-16 五洋建設株式会社 Work caisson and cut-off method for the same
CN104631338A (en) * 2015-02-16 2015-05-20 中交第二航务工程局有限公司 Steel boxed cofferdam and positioning construction method
CN107447767A (en) * 2017-08-10 2017-12-08 重庆水利电力职业技术学院 A kind of prefabricated reinforced concrete bottom plate steel lifted trunk and its construction method

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