阅读说明：本技术 一种用于预制墩台水下止水结构及其施工方法 (Underwater water stopping structure for prefabricated pier and construction method thereof ) 是由 郑和晖 张晓光 王敏 代浩 俞俊业 杨建平 邓玉鑫 余小龙 彭成明 李刚 田飞 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种适用于预制墩台的水下止水结构及其施工方法,其设置在钢管桩和预制墩台之间,所述预制墩台设置在钢管桩外侧,其特征在于,所述水下止水结构包括,第一止水结构,其为筒状,且贴合套设在所述钢管桩的外侧；第二止水结构,其为环板状,且套设在所述第一止水结构的外侧且位于所述预制承台的底部,所述第二止水结构的环板状上壁与所述预制承台的底部贴合；多个第三止水结构,其填充于所述第一止水结构与所述钢板桩之间、以及所述第二止水结构与所述预制承台的底部之间。本发明的技术方案具有快速、有效止水,且止水系统简单、施工方法方便快捷的技术效果。可广泛应用于预制墩台的止水结构技术领域。(The invention discloses an underwater water stop structure suitable for a prefabricated pier and a construction method thereof, wherein the underwater water stop structure is arranged between a steel pipe pile and the prefabricated pier, and the prefabricated pier is arranged on the outer side of the steel pipe pile; the second water stopping structure is in a ring plate shape, is sleeved on the outer side of the first water stopping structure and is positioned at the bottom of the prefabricated bearing platform, and the ring plate-shaped upper wall of the second water stopping structure is attached to the bottom of the prefabricated bearing platform; and the third water stopping structures are filled between the first water stopping structure and the steel sheet pile and between the second water stopping structure and the bottom of the prefabricated bearing platform. The technical scheme of the invention has the technical effects of quick and effective water stopping, simple water stopping system and convenient and quick construction method. But wide application in the stagnant water structural technology field of prefabricated pier.)

1. An underwater water-stopping structure suitable for a prefabricated pier is arranged between a steel pipe pile and a prefabricated pier, the prefabricated pier is arranged on the outer side of the steel pipe pile, and the underwater water-stopping structure is characterized by comprising,

the first water stopping structure is cylindrical and is fitted and sleeved on the outer side of the steel pipe pile;

the second water stopping structure is in a ring plate shape, is sleeved on the outer side of the first water stopping structure and is positioned at the bottom of the prefabricated bearing platform, and the ring plate-shaped upper wall of the second water stopping structure is attached to the bottom of the prefabricated bearing platform;

and the third water stopping structures are filled between the first water stopping structure and the steel sheet pile and between the second water stopping structure and the bottom of the prefabricated bearing platform.

2. The underwater water stopping structure suitable for the prefabricated abutment according to claim 1, wherein the third water stopping structure is a rubber water stopping structure.

3. The underwater water stopping structure suitable for the prefabricated abutment according to claim 2, wherein the rubber water stopping structure comprises a compressed rubber water stopping strip which is filled and arranged between the second water stopping structure and the bottom of the prefabricated bearing platform.

4. The underwater water stopping structure suitable for the prefabricated abutment according to claim 3, wherein the rubber water stopping structure further comprises a composite rubber water stopping strip which is composed of ethylene propylene diene monomer and compression rubber, and the composite rubber water stopping strip is filled between the first water stopping structure and the steel pipe pile.

5. The underwater water stopping structure suitable for the prefabricated abutment according to claim 3, wherein one surface of the compressed rubber water stopping strip is a first pasting part which is a plane, a first protruding compression part is arranged on the other surface of the compressed rubber water stopping strip, the compressed rubber water stopping strip is pasted between the first water stopping structure and the steel pipe pile, the first compression part is a plurality of rubber structures which are arranged at equal intervals and are provided with wave crests and wave troughs, and the rubber water stopping strip is connected to the second water stopping structure through a first bolt.

6. The underwater water stopping structure suitable for the prefabricated abutment according to claim 4, wherein the composite rubber water stopping belt is formed by clamping ethylene propylene diene monomer and compression rubber, one surface of the compression rubber is a second pasting part, the other surface of the compression rubber is a second compression part, the second pasting part is pasted on the first water stopping structure, a plurality of penetrating circular holes are formed in the second compression part, and the end surface, far away from the second pasting part, of the second compression part is provided with a plurality of clamping grooves which are arranged at equal intervals;

the compressed rubber is characterized in that one surface of the compressed rubber is provided with a plurality of clamping blocks arranged at intervals, the other surface of the compressed rubber is attached to the side wall of the steel pipe pile, the clamping blocks are clamped in the clamping grooves in a one-to-one correspondence mode, and the composite rubber water stop belt is connected to the first water stop structure through a second bolt.

7. The underwater water stopping structure suitable for the prefabricated abutment according to claim 1, wherein a hoisting device is arranged on the steel pipe pile right above the second water stopping structure, is vertically hoisted on the second water stopping structure, and is used for tensioning the distance between the second water stopping structure and the prefabricated abutment.

8. A construction method suitable for a prefabricated pier underwater water stop structure is characterized by comprising the following steps:

step S1, installing the third water stopping structures at predetermined positions of the first water stopping structure and the second water stopping structure, respectively;

step S2, sinking the steel pipe pile into a preset underwater position, lowering a water stopping structure, and adjusting the position once to enable the first water stopping structure to be naturally close to the outer wall of the steel pipe pile;

step S3, placing a plurality of prefabricated abutments to the outer side of the steel pipe pile, and adjusting the secondary position of the water stopping structure to enable the second water stopping structure to naturally approach the bottom of the prefabricated abutments;

and step S4, performing third position adjustment on the water stopping structure, so that the second water stopping structure in the step S3 is changed from naturally approaching the prefabricated abutment to a state of being tightly pressed and attached to the bottom of the prefabricated abutment, and the first water stopping structure in the step S2 is changed from naturally approaching the outer wall of the steel pipe pile to a state of being tightly pressed and attached to the outer wall of the steel pipe pile.

9. The construction method for the prefabricated pier underwater water stop structure according to claim 8, wherein the prefabricated pier is a second L-shaped structure consisting of a horizontal part and a vertical part, a pouring gap is left between the vertical part and the steel pipe pile, and after the step S4 is completed, an underwater pouring process is performed to pour the pouring gap layer by layer;

and a groove is formed in the middle of the vertical part, the notch is opposite to the steel pipe pile, and water in the groove is pumped out after the underwater pouring process is completed.

Technical Field

The invention relates to the technical field of water stop structures of prefabricated abutments. More particularly, the present invention relates to an underwater waterstop structure for prefabricating a pier and a construction method thereof.

Background

The large bridges across rivers and the seas in China are more and more, and the construction window period is very limited under the severe working condition. In order to reduce the influence of environmental factors and improve the construction efficiency, a basic design provides a guideline of 'large-scale, factory, standard and assembly', the project construction adopts a full-prefabricated hoisting construction process of a bearing platform pier body, and post-cast concrete is adopted for wet joint between a prefabricated bearing platform and a steel pipe composite pile. Under the condition, how to ensure whether the gap between the bearing platform and the pipe wall of the steel pipe can be successfully sealed becomes a key control factor for success or failure of the foundation construction.

In traditional construction, an integral pouring jacket and large-volume concrete bottom sealing water stopping scheme is often adopted, novel water stopping methods such as a water stopping tray and an inflatable capsule are also provided in recent years, but the project amount is large in the practical operation process of the scheme, and under the condition of a low water head, the water stopping device is high in manufacturing cost and low in construction efficiency, so that the related water stopping technology is very necessary to be optimized.

Disclosure of Invention

The invention aims to provide an underwater water stop structure suitable for a prefabricated pier and a construction method thereof.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an underwater water stopping structure adapted to a prefabricated abutment provided between a steel pipe pile and the prefabricated abutment provided at an outer side of the steel pipe pile, the underwater water stopping structure including,

the first water stopping structure is cylindrical and is fitted and sleeved on the outer side of the steel pipe pile;

the second water stopping structure is in a ring plate shape, is sleeved on the outer side of the first water stopping structure and is positioned at the bottom of the prefabricated bearing platform, and the ring plate-shaped upper wall of the second water stopping structure is attached to the bottom of the prefabricated bearing platform;

and the third water stopping structures are filled between the first water stopping structure and the steel sheet pile and between the second water stopping structure and the bottom of the prefabricated bearing platform.

Preferably, the third water stopping structure is a rubber water stopping structure.

Preferably, the rubber water stop structure comprises a compressed rubber water stop band which is filled between the second water stop structure and the bottom of the prefabricated bearing platform.

Preferably, the rubber water stop structure further comprises a composite rubber water stop band, the composite rubber water stop band is composed of ethylene propylene diene monomer and compressed rubber, and the composite rubber water stop band is filled between the first water stop structure and the steel pipe pile.

Preferably, the one side of compressed rubber waterstop is for being planar first portion of pasting, and the another side is provided with outstanding first compression portion, the compressed rubber waterstop pastes first stagnant water structure with between the steel-pipe pile, first compression portion is the rubber structure that has crest and trough that a plurality of equidistance intervals set up, just the rubber waterstop passes through first bolted connection and is in the second stagnant water is structural.

Preferably, the composite rubber waterstop comprises a rubber layer and a rubber layer, wherein the rubber layer is formed by clamping ethylene propylene diene monomer and compressed rubber, one surface of the compressed rubber is a second pasting part, the other surface of the compressed rubber is a second compression part, the second pasting part is pasted on the first waterstop structure, a plurality of penetrating circular holes are formed in the second compression part, and the end surface, far away from the second pasting part, of the second compression part is provided with a plurality of clamping grooves which are arranged at equal intervals;

the compressed rubber is characterized in that one surface of the compressed rubber is provided with a plurality of clamping blocks arranged at intervals, the other surface of the compressed rubber is attached to the side wall of the steel pipe pile, the clamping blocks are clamped in the clamping grooves in a one-to-one correspondence mode, and the composite rubber water stop belt is connected to the first water stop structure through a second bolt.

Preferably, a hoisting device is arranged on the steel pipe pile and located right above the second water stopping structure, and the hoisting device is vertically hoisted on the second water stopping structure and used for tensioning the distance between the second water stopping structure and the prefabricated abutment.

A construction method suitable for a prefabricated pier underwater water stop structure comprises the following steps:

step S1, installing the third water stopping structures at predetermined positions of the first water stopping structure and the second water stopping structure, respectively;

step S2, sinking the steel pipe pile into a preset underwater position, lowering a water stopping structure, and adjusting the position once to enable the first water stopping structure to be naturally close to the outer wall of the steel pipe pile;

step S3, placing a plurality of prefabricated abutments to the outer side of the steel pipe pile, and adjusting the secondary position of the water stopping structure to enable the second water stopping structure to naturally approach the bottom of the prefabricated abutments;

and step S4, performing third position adjustment on the water stopping structure, so that the second water stopping structure in the step S3 is changed from naturally approaching the prefabricated abutment to a state of being tightly pressed and attached to the bottom of the prefabricated abutment, and the first water stopping structure in the step S2 is changed from naturally approaching the outer wall of the steel pipe pile to a state of being tightly pressed and attached to the outer wall of the steel pipe pile.

Preferably, the prefabricated abutment is a second L-shaped structure consisting of a horizontal part and a vertical part, a pouring gap is left between the vertical part and the steel pipe pile, and after the step S4 is completed, an underwater pouring process is performed to pour the pouring gap layer by layer;

and a groove is formed in the middle of the vertical part, the notch is opposite to the steel pipe pile, and water in the groove is pumped out after the underwater pouring process is completed.

The invention at least comprises the following beneficial effects:

1. the invention not only can solve the difficult problem of water stop of overlarge or uneven gap between the prefabricated bearing platform and the pipe wall caused by low pile sinking precision of the steel pipe pile, but also can quickly and effectively stop water, and replaces the traditional construction scheme of large-volume concrete bottom sealing water stop.

2. The water stopping system has simple structure, convenient and quick construction method, reduces the environmental pollution to a certain extent, and has obvious cost advantage and great popularization and use value.

3. The sealing effect is good, and the underwater sealing water stop of the prefabricated abutment is realized by mutually matching the first water stop structure, the second water stop structure and the third water stop structure.

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 structural view of an underwater water stopping structure suitable for a prefabricated abutment of the present invention;

FIG. 2 is an enlarged view of A of FIG. 1 according to the present invention;

FIG. 3 is a block diagram of a compressed rubber waterstop of the present invention;

fig. 4 is a structural view of the composite rubber waterstop of the invention.

The specification reference numbers indicate: 1. the steel pipe pile comprises a steel pipe pile body, 2, a prefabricated pier, 3, a first water stopping structure, 4, a second water stopping structure, 5, a compressed rubber water stopping strip, 6, a hoisting device, 7, a composite rubber water stopping strip, 8, a stiffening rib, 501, a first pasting part, 502, a first compressing part, 503, a first bolt, 701, compressed rubber, 702, ethylene propylene diene monomer rubber, 703, a second pasting part, 704, a round hole, 705 and a second bolt.

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.

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 to 4, an underwater water stopping structure suitable for a prefabricated abutment is provided between a steel pipe pile 1 and a prefabricated abutment 2, the prefabricated abutment 2 is provided at an outer side of the steel pipe pile 1, the underwater water stopping structure includes,

the first water stopping structure 3 is cylindrical and is fitted and sleeved on the outer side of the steel pipe pile 1;

the second water stopping structure 4 is in a ring plate shape, is sleeved on the outer side of the first water stopping structure 3 and is positioned at the bottom of the prefabricated bearing platform, and the ring plate-shaped upper wall of the second water stopping structure 4 is attached to the bottom of the prefabricated bearing platform;

and the third water stopping structures are filled between the first water stopping structure 3 and the steel sheet pile and between the second water stopping structure 4 and the bottom of the prefabricated bearing platform.

In the technical scheme, the water stopping function of the side walls of the prefabricated pier 2 and the steel pipe pile 1 is realized by mutually matching the first water stopping structure 3, the second water stopping structure 4 and the third water stopping structure, and during setting, mounting materials are prepared first, and a water stopping steel frame is welded in a prefabricated field; cutting rubber waterstops and composite rubber waterstops 7 of corresponding specifications, and sticking or fixing the rubber waterstops and the composite rubber waterstops on a steel frame by bolts according to design requirements; then, after all the steel pipe piles 1 are sunk in place and meet the construction precision, lowering the water-stopping steel frame to a preset position, and properly adjusting the gap between the water-stopping steel frame and the steel pipe; transporting the prefabricated bearing platform to a construction site, hoisting and positioning by adopting hoisting equipment, temporarily fixing the prefabricated bearing platform after positioning is finished, arranging the fixed prefabricated bearing platform at two sides of the steel pipe pile 1, and forming a gap between the prefabricated bearing platform and the water-stopping steel frame; finally, 6 steel bars and a turnbuckle lifting device are arranged on the outer wall of the steel pipe column in the annular direction, and the rubber waterstop fixed on the top surface of the steel plate is in contact with the bottom surface of the prefabricated bearing platform by applying upward lifting force to the annular waterstop steel plate and generates certain compression deformation; properly adjusting the gap between the radial annular plate and the steel pipe wall to enable the side face of the composite water stop belt to be tightly attached to the outer wall of the steel pipe pile 1 as much as possible, then standing the composite water stop belt, and waiting for the expansion of the volume of the expanded rubber, so that the side face of the steel pipe pile 1 is further compressed to complete the water stop process; and after the water-stopping pipe pile reaches the design strength, pumping water into a cavity formed by the steel pipe pile 1 and the prefabricated bearing platform after water stopping, and further completing the water stopping process.

In another technical scheme, the third water stopping structure is a rubber water stopping structure.

Among the above-mentioned technical scheme, rubber stagnant water structure has good can and ductility, and the extrusion formula that is more fit for between pier and the steel-pipe pile 1 under water seals stagnant water.

In another technical scheme, the rubber water stop structure comprises a compressed rubber water stop belt 5 which is filled between the second water stop structure 4 and the bottom of the prefabricated bearing platform.

In the above technical scheme, the second water stopping structure 4 is an L-shaped lifting structure, the compressed rubber 701 water stopping belt 5 is firstly arranged between the second water stopping structure 4 and the prefabricated bearing platform, and then the second water stopping structure 4 is lifted and pulled to be compacted, so that a sealing water stopping effect is achieved.

Furthermore, a stiffening rib 8 is arranged on the side wall of the bottom between the steel pipe pile 1 and the prefabricated abutment 2.

In another technical scheme, the rubber water stop structure further comprises a composite rubber water stop 7, the composite rubber water stop 7 is composed of ethylene propylene diene monomer 702 and compression rubber 701, and the composite rubber water stop 7 is filled between the first water stop structure 3 and the steel pipe pile 1.

In another technical scheme, one side of the compressed rubber 701 waterstop 5 is a first pasting part 501 which is a plane, the other side of the compressed rubber 701 waterstop 5 is provided with a first protruding compressing part 502, the compressed rubber 701 waterstop 5 is pasted between the first waterstop structure 3 and the steel pipe pile 1, the first compressing part 502 is a plurality of rubber structures which are arranged at equal intervals and have wave crests and wave troughs, and the rubber waterstop is connected to the second waterstop structure 4 through a first bolt 503.

In the above technical scheme, first portion 501 of pasting for paste and fix on first stagnant water structure 3, first compression portion 502 is crest trough shape, and when receiving the extrusion, the crest extrudees towards the trough direction, stops as the extrusion force, and first compression portion 502 kick-backs, and then fills first stagnant water structure 3 and steel-pipe pile 1, forms closely knit sealed environment.

In another technical scheme, the rubber composite waterstop 7 comprises a structure formed by clamping and arranging the ethylene propylene diene monomer 702 and the compression rubber 701, one surface of the compression rubber 701 is a second pasting part 703, the other surface of the compression rubber 701 is a second compression part, the second pasting part 703 is pasted and arranged on the first waterstop structure 3, a plurality of penetrating circular holes 704 are arranged on the second compression part, and the end surface of the second compression part far away from the second pasting part 703 is provided with a plurality of clamping grooves arranged at equal intervals;

the compressed rubber 701 is provided with a plurality of clamping blocks at intervals on one surface, the other surface is attached to the side wall of the steel pipe pile 1, the plurality of clamping blocks are clamped in the plurality of clamping grooves in a one-to-one correspondence mode, and the composite rubber waterstop 7 is connected to the first waterstop structure 3 through a second bolt 705.

In the above technical scheme, the composite rubber water stop structure is composed of the compression rubber 701 and the ethylene propylene diene monomer rubber 702, the round hole 704 of the compression rubber 701 has a space contraction function, and when the compression rubber is squeezed, the round hole is temporarily contracted and provides resilience force when the squeezing force is relieved, so that the compression rubber 701 and the ethylene propylene diene monomer rubber 702 generate squeezing force from inside to outside, and the sealing technical effect is achieved.

In another technical scheme, a hoisting device 6 is arranged on the steel pipe pile 1 and located right above the second water stopping structure 4, and the hoisting device is vertically hoisted on the second water stopping structure 4 and used for tensioning the distance between the second water stopping structure 4 and the prefabricated abutment 2.

A construction method suitable for an underwater water stop structure of a prefabricated pier 2 comprises the following steps:

step S1, installing the third water stopping structures at predetermined positions of the first water stopping structure 3 and the second water stopping structure 4, respectively;

step S2, sinking the steel pipe pile 1 to a preset underwater position, lowering a water stopping structure, and adjusting the position once to enable the first water stopping structure 3 to be naturally close to the outer wall of the steel pipe pile 1;

step S3, lowering a plurality of prefabricated abutments 2 to the outer side of the steel pipe pile 1, and adjusting the secondary position of the water stopping structure to enable the second water stopping structure 4 to naturally approach the bottom of the prefabricated abutments 2;

and step S4, performing third position adjustment on the water stopping structure, so that the second water stopping structure 4 in the step S3 is changed from being naturally close to the prefabricated abutment 2 to a state of being tightly pressed against the bottom of the prefabricated abutment 2, and the first water stopping structure 3 in the step S2 is changed from being naturally close to the outer wall of the steel pipe pile 1 to a state of being tightly pressed against the outer wall of the steel pipe pile 1.

In another technical scheme, the prefabricated abutment 2 is a second L-shaped structure consisting of a horizontal part and a vertical part, a pouring gap is reserved between the vertical part and the steel pipe pile 1, and after the step S4 is completed, an underwater pouring process is performed to pour the pouring gap layer by layer;

and a groove is formed in the middle of the vertical part, the notch is opposite to the steel pipe pile 1, and water in the groove is pumped out after the underwater pouring process is completed.

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.