CN110067203B - Pier body bent cap hanging bracket applied to strong-surge low-pier area - Google Patents

Pier body bent cap hanging bracket applied to strong-surge low-pier area Download PDF

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Publication number
CN110067203B
CN110067203B CN201910315586.3A CN201910315586A CN110067203B CN 110067203 B CN110067203 B CN 110067203B CN 201910315586 A CN201910315586 A CN 201910315586A CN 110067203 B CN110067203 B CN 110067203B
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China
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casing
pier
surge
pile foundation
strong
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CN110067203A (en
Inventor
胡安祥
董科
鲁力
刘景红
秦宗平
刘亚东
林树奎
李宁
汪磊
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CCCC Second Harbor Engineering Co
China Communications 2nd Navigational Bureau 2nd Engineering Co Ltd
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CCCC Second Harbor Engineering Co
China Communications 2nd Navigational Bureau 2nd Engineering Co Ltd
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    • 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
    • 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
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a pier body bent cap hanging bracket applied to a strong surge low pier area, which comprises: the supporting bodies are distributed at intervals and are inserted into the seabed; each supporting main body comprises a pile foundation casing inserted into the seabed and a large casing fixedly sleeved outside the pile foundation casing, and the pile foundation casing and the large casing are partially overlapped; the pile foundation casing and the large casing are spaced at a certain distance, and the space between the pile foundation casing and the large casing is available for construction operation of operators; the bearing beam is placed at the tops of all the large protection cylinders simultaneously; and the plurality of supports are arranged on the bearing cross beam and are used for constructing the pier body capping beam. The bent cap suspension bracket is simple to mount, clear in stress, safe and reasonable, and convenient to operate, can realize the environment of dry construction work industry for pouring the bent cap of the pier body in situ under the condition of strong surge, and protects the safety of operators, thereby greatly reducing the window period condition required by construction, and directly providing the construction condition of the pier body part under water.

Description

Pier body bent cap hanging bracket applied to strong-surge low-pier area
Technical Field
The invention relates to the field of suspension supports. More particularly, the invention relates to a pier body bent cap suspension bracket applied to a strong surge low pier area.
Background
The low-pier capping beam generally means that the distance between the bottom surface of the capping beam and the water surface and the bottom surface of a riverbed is smaller, and the low-pier capping beam consists of a separated double-pile foundation, a pier body and a capping beam structure. A single-pile low-pier bent cap in a shallow beach area is constructed in an inland river or a common sea area, a hanging box is generally constructed to block water, a dry construction environment is formed, a pier body is constructed in the hanging box, and then a support is erected to form a cast-in-place bent cap.
In the strong surge shoal sea area, the construction drawbacks of the conventional hanging box and the cast-in-place support are mainly reflected as follows:
1) the construction process is complicated, the construction process comprises a series of processes of assembling and lowering the hanging box, sealing the bottom and lowering the water, constructing the pier body foundation, erecting the bent cap support, casting the bent cap in place and the like, and the construction period is long.
2) The integral hanging box has large water-facing area, needs to bear the impact of strong surge, has enough strong rigidity and large cost consumption.
3) The distance between the low pier support and the water surface is low, and the operation difficulty of hoisting, positioning, dismantling and support mounting of the hanging box is high in the strong surge sea area;
therefore, in the field of constructing the low pier capping beam in the strong-surge shallow sea area, a new construction suspension bracket structure needs to be developed.
Disclosure of Invention
In order to achieve the above object, the present invention provides a pier body capping beam suspension bracket applied to a strong-surge low-pier region, comprising:
the supporting bodies are distributed at intervals and are inserted into the seabed; each supporting main body comprises a pile foundation casing inserted into the seabed and a large casing fixedly sleeved outside the pile foundation casing, and the pile foundation casing and the large casing are partially overlapped; the pile foundation casing and the large casing are spaced at a certain distance, and the space between the pile foundation casing and the large casing is available for construction operation of operators;
the bearing beam is placed at the tops of all the large protection cylinders simultaneously;
and the plurality of supports are arranged on the bearing cross beam and are used for constructing the pier body capping beam.
Preferably, the pier body capping beam suspension bracket applied to the strong-surge low-pier area is characterized in that a plurality of shear plates are symmetrically welded between the large pile casing and the pile foundation casing so as to fixedly connect the large pile casing and the pile foundation casing into a whole.
Preferably, be applied to pier shaft bent cap hanging support in low mound district of strong surge, still include: the first waterproof board is placed at the tops of all the large protective cylinders and attached to the lower portion of the bearing beam, and therefore the situation that sea waves rush to the upper portion of the bearing beam to affect construction is avoided.
Preferably, be applied to pier shaft bent cap hanging support in low mound district of strong surge, still include: the second waterproof board is annularly connected to the upper end of the large protection barrel, so that the situation that sea waves rush into the large protection barrel to affect construction is avoided, and the top end of the second waterproof board is higher than the top end of the large protection barrel.
Preferably, be applied to pier shaft bent cap hanging support in the low mound district of strong surge, the elevation on a big fender section of thick bamboo top is according to bent cap construction and the height determination that surges, reserves out the installation space of assembled support, guarantees to surge in the work progress and does not surge a big fender section of thick bamboo.
Preferably, the pier body capping beam hanging bracket applied to the low-pier region with strong surge is characterized in that the shear plate is located at a window region with small surge height.
Preferably, the pier body bent cap suspension bracket applied to the strong-surge low-pier area is characterized in that the top end of the large protective cylinder is symmetrically grooved to form two arc-shaped notches so as to mount and clamp the bearing cross beam;
and the notch is positioned above the shear plate.
Preferably, the pier body capping beam hanging bracket applied to the strong-surge low-pier area is detachably connected with the bearing cross beam through bolts.
The invention at least comprises the following beneficial effects:
1) the structure of the hanging box is simplified, the large protecting sleeve and the pile foundation protecting sleeve are used as the stress foundation of the whole cast-in-place structure, the problems that the hanging box is easy to damage under the action of strong surge impact and is difficult to place and position are solved, and the wave blocking effect is realized;
2) the whole support stress is finally transmitted to the pile foundation casing, and the problem of a cast-in-place support bearing system is solved.
3) The advantage that pile foundation protects a section of thick bamboo stability good has been make full use of, and the operation of unit-installment, the installation is demolishd the convenience and has been solved the big problem of cast-in-place scaffold erection welding degree of difficulty.
4) The installation is simple, and the atress is clear and definite, and is safe reasonable, and convenient operation can realize the cast-in-place working environment of executing futilely of pier shaft bent cap under the strong billow condition, protects operation personnel safety to greatly reduced the required window period condition of construction, and directly provided the construction condition of pier shaft part under water. Meanwhile, the bearing steel beam and the bracket are of prefabricated mounting structures, so that the mounting and the dismounting are easy, the risk of a welding process in a surge environment is reduced, and the operation efficiency is high;
additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the overall structure of a pier body capping beam suspension bracket applied to a strong surge low pier region;
FIG. 2 is a top view of the pier body bent cap suspension bracket applied to a strong surge low pier area;
FIG. 3 is a schematic view of a single support body of the present invention;
figure 4 is a top view of a single support body of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, the present invention provides a pier body bent cap suspension bracket applied to a strong-surge low-pier region, comprising:
a plurality of support bodies 1 which are distributed at intervals and are all inserted into the sea bottom; each support body 1 comprises a pile foundation casing 101 inserted into the seabed and a large casing 102 fixedly sleeved outside the pile foundation casing 101, and the two parts are overlapped; the pile foundation casing 101 and the large casing 102 are spaced at a certain distance, and the space between the pile foundation casing 101 and the large casing is available for construction operation of operators;
the bearing beam 3 is placed on the tops of all the large protective cylinders 102 at the same time;
the plurality of supports 2 are arranged on the bearing cross beam 3 and used for pier body capping beam construction, and as shown in figure 1, the supports 2 are assembled on a distribution beam 7 of the bearing cross beam 3; and the bracket 2 and the distribution beam 7 are welded.
The construction steps of the pier body bent cap suspension bracket of the invention are as follows: first hoist respectively big casing 102, through the direction steel sheet along propping pile foundation casing 101 and transferring, big casing 102 can reduce the wave effectively and protect the climbing of section 101 in the pile foundation casing (even the wave is squeezed into big casing from the bottom, because it can weaken greatly after squeezing into big casing inside, also can't climb, can not influence the construction). The top elevation of the large pile casing 102 is determined according to the capping beam construction and the surge height, the installation space of the assembly type support is reserved, and the surge is guaranteed not to surge into the large pile casing 102. The diameter of the large casing 102 is generally larger than that of the pile foundation casing 101 by about 1.2m, so that an operator can conveniently work between the large casing 102 and the pile foundation casing 101, and meanwhile, a sufficient mounting position of a bearing steel beam is provided.
The whole structure can resist larger surge, meets the condition of bracket installation vertical support during the construction of the bent cap, and is in a dry construction state when the pier body steel bar binding template installation and the construction of the bent cap are carried out. After the bent cap construction is completed and the strength is reached, firstly removing the pier body bent cap template, then reversely removing the support 2, the water baffle (comprising the first waterproof plate 4 and the second waterproof plate 6) and the bearing beam 3 in sequence according to the installation sequence, finally cutting the large protection cylinder 102 and the pile foundation protection cylinder 101 into two halves, lifting out the pier body, and underwater cutting the underwater part by a diver. During underwater cutting, a diver firstly performs circular cutting and decomposition on the underwater part of the pile foundation casing 101, and the diver operates on the inner side of the large casing 102 at the moment, so that the underwater pile foundation casing is safer. And then underwater cutting of the large casing 102 is performed. The large protective cylinder 102 is used as a water retaining measure, so that the diving cutting efficiency is improved, and the window dependence is reduced. Compared with the traditional cofferdam construction, the construction of the suspension bracket provided by the invention has the advantages that the window period condition required by the construction is greatly reduced, the construction efficiency is improved, and the cost of each bracket can be reduced by 80 tens of thousands (each bracket comprises 2 large protection sleeves).
In another embodiment, as shown in fig. 4, in the pier body capping beam suspension bracket applied to a strong-surge low-pier region, a plurality of shear plates 5 are symmetrically welded between the large casing 102 and the pile foundation casing 101 to fixedly connect the two into a whole. And in a window area with smaller surge, a shear plate 5 is welded between the large pile casing 102 and the pile foundation casing 101 to form a stress base of the bearing cross beam 3.
In another embodiment, the pier body capping beam suspension bracket applied to the region of the strong-surge low pier further comprises, as shown in fig. 1: the first waterproof plate 4 is placed at the tops of all the large protective cylinders 102 at the same time, and is attached to the lower portion of the bearing cross beam 3, so that the situation that sea waves rush to the upper portion of the bearing cross beam 3 to affect construction is avoided.
In another embodiment, the pier body capping beam suspension bracket applied to the region of the strong-surge low pier further comprises, as shown in fig. 1: the second waterproof board 6 is annularly connected to the upper end of the large pile casing 102, so that the situation that sea waves rush into the large pile casing 102 to affect construction is avoided, and the top end of the second waterproof board 6 is higher than the top end of the large pile casing 102.
In another embodiment, the pier body capping beam suspension bracket applied to the strong-surge low-pier area is characterized in that the elevation of the top end of the large protection barrel 102 is determined according to capping beam construction and surge height, the installation space of the assembly type bracket is reserved, and the large protection barrel 102 is prevented from being flooded by surge in the construction process.
In another embodiment, the pier body capping beam hanging bracket applied to the low-pier region with strong surge is characterized in that the shear plate 5 is positioned at a window region with small surge.
In another embodiment, as shown in fig. 3-4, the top end of the large casing 102 is symmetrically grooved to form two circular-arc notches 103, and both the two notches 103 are parallel to the direction of the coping to mount and clamp the bearing beam 3; by the arrangement, the bearing cross beam 3 can be just clamped in the two notches 103, and the horizontal movement can not occur; and the notch 103 is located above the shear plate 5.
In another embodiment, the pier body capping beam suspension bracket applied to the strong-surge low-pier area is characterized in that the first waterproof plate 4 and the bearing cross beam 3 are detachably connected through bolts, so that welding is avoided, the dependence on a window period with smaller sea waves is reduced, the first waterproof plate can be quickly connected or detached, the window period with long time does not need to be waited, and the construction efficiency is improved.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a be applied to pier shaft bent cap hanging support in low mound district of strong surge which characterized in that includes:
the supporting bodies are distributed at intervals and are inserted into the seabed; each supporting main body comprises a pile foundation casing inserted into the seabed and a large casing fixedly sleeved outside the pile foundation casing, and the pile foundation casing and the large casing are partially overlapped; the pile foundation casing and the large casing are spaced at a certain distance, and the space between the pile foundation casing and the large casing is available for construction operation of operators;
the bearing beam is placed at the tops of all the large protection cylinders simultaneously;
and the plurality of supports are arranged on the bearing cross beam and are used for constructing the pier body capping beam.
2. The pier body bent cap hanging bracket applied to the strong-surge low-pier area according to claim 1, wherein a plurality of shear plates are symmetrically welded between the large pile casing and the pile foundation casing so as to fixedly connect the large pile casing and the pile foundation casing into a whole.
3. The pier body bent cap suspension bracket applied to the strong-surge low-pier region according to claim 1, further comprising: the first waterproof board is placed at the tops of all the large protective cylinders and attached to the lower portion of the bearing beam, and therefore the situation that sea waves rush to the upper portion of the bearing beam to affect construction is avoided.
4. The pier body bent cap suspension bracket applied to the strong-surge low-pier region according to claim 1, further comprising: the second waterproof board is annularly connected to the upper end of the large protection barrel, so that the situation that sea waves rush into the large protection barrel to affect construction is avoided, and the top end of the second waterproof board is higher than the top end of the large protection barrel.
5. The pier body capping beam suspension bracket applied to the strong-surge low-pier area according to claim 1, wherein the elevation of the top end of the large protection cylinder is determined according to capping beam construction and surge height, and an installation space of the assembly type bracket is reserved to ensure that the surge does not flow into the large protection cylinder in the construction process.
6. The pier body bent cap suspension bracket applied to the area with the strong swell and the low pier is characterized in that the shear plate is positioned at a height in a window area with small swell.
7. The pier body bent cap suspension bracket applied to the strong surge low pier area according to claim 2, wherein the top end of the large pile casing is symmetrically grooved to form two circular-arc-shaped notches so as to be installed and clamped with the bearing cross beam;
and the notch is positioned above the shear plate.
8. The pier body bent cap suspension bracket applied to the area with strong surge and low pier of claim 3, wherein the first waterproof plate is detachably connected with the bearing cross beam through bolts.
CN201910315586.3A 2019-04-19 2019-04-19 Pier body bent cap hanging bracket applied to strong-surge low-pier area Active CN110067203B (en)

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CN110616635B (en) * 2019-08-12 2020-12-25 中交二航局第二工程有限公司 Closure structure and lowering dislocation closure method of hybrid beam rigid frame bridge under strong surge condition
CN110616636B (en) * 2019-08-12 2020-12-25 中交二航局第二工程有限公司 Closure structure of hybrid beam rigid frame bridge under strong surge condition and method for lifting staggered closure
CN110528376B (en) * 2019-09-16 2021-10-19 中建五局土木工程有限公司 Assembly plate assembly, bearing device and construction process

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