CN112144513B

CN112144513B - Construction method of prefabricated assembled underwater tie beam

Info

Publication number: CN112144513B
Application number: CN202011024017.2A
Authority: CN
Inventors: 莫志强; 刘刚; 罗红; 范超怀; 蔡华; 朱倩
Original assignee: Sichuan Communications Construction Group Co Ltd
Current assignee: Sichuan Communications Construction Group Co Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2022-04-01
Anticipated expiration: 2040-09-25
Also published as: CN112144513A

Abstract

The invention discloses a construction method of a prefabricated assembled underwater tie beam, which comprises the steps of prefabricating the tie beam, installing sleeves at two ends of the prefabricated tie beam, and then sleeving the sleeves on the periphery of a pile casing of a molded foundation; lowering the sleeve to a designated installation position, pouring bottom sealing concrete between the pile casing and the sleeve, and evacuating a water body between the pile casing and the sleeve; then, the pile casing is detached along the top of the pile foundation, and cast-in-place construction operations such as steel bar binding and the like are carried out in the sleeve; and after the pile beam is connected, solidified and molded, breaking the bottom sealing concrete, and dismantling the sleeve to complete construction. According to the construction method, the sleeve replaces the pile casing to serve as a waterproof part for subsequent construction operation, so that the construction area can be reduced to the size of the pile foundation range, the pollution to a water body and the occupation of the section area of flowing water are reduced, a large amount of turnover materials and cost are saved, and the construction efficiency is improved; and the construction quality of pile column and tie beam construction is ensured, the integral waterproof performance is improved, and the engineering quality is guaranteed.

Description

Construction method of prefabricated assembled underwater tie beam

Technical Field

The invention relates to the technical field of bridge construction, in particular to a construction method of a prefabricated assembled underwater tie beam.

Background

The tie beam is a structure which is positioned on the pier column and used for improving the stress of the column and the pile, is generally strip-shaped, and is used for connecting two piles with the same pier number, so that the two piles or the column are connected into a whole which is stressed together, and the integral rigidity of the pile or the pier is enhanced. The tie beam mainly comprises a pile foundation tie beam and a pile column tie beam, wherein the pile foundation tie beam is arranged at the junction of the pile and the pile column, is generally buried underground and mainly increases the transverse stability so that the pile foundation integrally bears the upper load; and the pile column tie beam is arranged in the middle of the pier and used for increasing the transverse stability of the pier. From the perspective of appearance and practicality, the tie beam of the wading bridge relates to underwater construction, and large construction difficulty exists. At present, to the construction of aquatic or underwater straining beam, adopt the mode of steel sheet pile cofferdam or steel boxed cofferdam to go on mostly, not only river course area occupied is big, and the week material quantity is big, and whole construction cycle is long moreover, and equipment requirement is high, still can produce great pollution to the water, is not conform to green theory.

Based on the above, the prior art provides a prefabricated installation method of a detachable pile casing and an underwater tie beam (with an authorized bulletin number of CN104988915B), wherein an upper pile casing, a middle pile casing and a lower pile casing are assembled into a whole by manufacturing a detachable pile casing device, the pile casing is embedded for pile foundation construction in a water area according to a pile position measurement lofting position, and then a tie beam placing groove is formed by detaching part of the upper pile casing and the middle pile casing, so that the underwater tie beam is installed. However, in order to achieve the specified bearing capacity, the pile driver can only be used for smashing the pile into the river bed when the pile casing is embedded, the integral rigidity of the separately assembled pile casing is poor, the pile foundation construction is adopted, the deformation of the connection part between the pile casings can be caused, the verticality of the pile column cannot be ensured, the waterproof measure of the connection part between the pile casings can be damaged, and great potential safety hazards are generated.

Disclosure of Invention

Therefore, in order to solve the above problems, it is necessary to provide a construction method of a prefabricated assembled underwater tie beam, which is convenient to operate, safe, reliable, economical and efficient, so as to ensure engineering quality and construction efficiency.

The invention is realized by the following technical scheme:

a construction method of a prefabricated underwater tie beam comprises the following construction steps:

s1, forming the precast tie beam according to design requirements, preparing sleeves adapted to the precast tie beam and correspondingly installing the sleeves at two ends of the precast tie beam, and taking waterproof measures between the sleeves and the precast tie beam;

s2, sleeving a sleeve loaded with a prefabricated tie beam on the periphery of a pile casing of the formed pile foundation or column body, lowering the sleeve along the pile casing, and keeping the top of the sleeve higher than the elevation of the water surface all the time in the lowering process;

s3, after the sleeve is lowered to the prefabricated tie beam to reach the specified installation position, pouring bottom sealing concrete between the pile casing and the sleeve, sealing the bottom of the sleeve, and evacuating the water body between the pile casing and the sleeve;

s4, detaching the pile casing along the top of the pile foundation, and carrying out steel bar installation and cast-in-place construction in the sleeve;

and S5, breaking the bottom sealing concrete, and dismantling and recycling the sleeve to finish construction.

In one embodiment, the cast-in-place construction comprises:

a) when installing a ground tie beam between pile foundations, the construction method comprises the cast-in-place construction operation of binding a pile top steel bar and a prefabricated tie beam end steel bar, setting up a template to pour pile beam end concrete, setting up a template to pour pier column concrete and removing the template;

b) when the waist tie beam is arranged between the columns, the construction method comprises the steps of binding steel bars at the top of the columns and steel bars at the end part of the prefabricated tie beam, setting up concrete at the beam end of a template pouring column, setting up pier column concrete on the template pouring tie beam and removing the template in a cast-in-place manner.

In one embodiment, the distance between the sleeve and the casing is not less than 15 CM.

In one embodiment, the bottom of the sleeve is formed with a rib inwardly; in step S2, the sleeve is lowered to the prefabricated tie beam to reach the designated installation position, a hollow plate is sleeved on the periphery of the casing, the hollow plate is lowered to the bottom of the sleeve along the outer side wall of the casing, the hollow plate is erected on the retaining edge, and then the bottom sealing concrete is poured.

In one embodiment, the sleeve is an integral sleeve and comprises a first sleeve body, the first sleeve body is formed by a pair of half sleeves in an involution mode, a plurality of groups of pin joint lugs and pin shafts are correspondingly arranged at the two involution connection positions of the two half sleeves, and the two half sleeves are folded and formed through the matched connection of the pin joint lugs and the pin shafts; a notch for placing a prefabricated tie beam is formed in a joint of the lower parts of the two half sleeves, and the end part of the prefabricated tie beam extends into the notch to be tightly connected with the first sleeve body; and a waterproof structure is arranged between the notch and the prefabricated tie beam.

In one embodiment, the sleeve is a segmented sleeve which comprises a plurality of segments of second sleeve bodies connected in sequence; the second sleeve body is formed by a pair of half sleeves in an involutive mode, a plurality of groups of pin connection lugs and pin shafts are correspondingly arranged at the joint of the two half sleeves in an involutive mode, and the two half sleeves are folded and formed through the matched connection of the pin connection lugs and the pin shafts; the bottom second sleeve body at the lowest end is provided with a notch for placing a prefabricated tie beam at a joint of the middle sections of the two half sleeves, and the end part of the prefabricated tie beam extends into the notch to be tightly connected with the second sleeve body; and a waterproof structure is arranged between the notch and the prefabricated tie beam.

In one embodiment, a first flange is arranged at the upper end of the second sleeve body, a second flange is arranged at the lower end of the second sleeve body, and the second sleeve bodies are connected in sequence through the butt joint of the first flange and the second flange; the first flanges comprise two first split flanges which are respectively and correspondingly arranged at the upper ends of the two half sleeves, and the two first split flanges are correspondingly folded when the two half sleeves are folded; the second flanges comprise two second split flanges, the two second split flanges are respectively and correspondingly arranged at the lower ends of the two half sleeves, and the two second split flanges are correspondingly folded when the two half sleeves are folded.

In one embodiment, the waterproof structure comprises a first waterproof board, a second waterproof board and two third waterproof boards;

the first waterproof plate is fixedly arranged on the upper side surface of the prefabricated tie beam, and waterproof filler is filled between the first waterproof plate and the notch;

the second waterproof board is fixedly arranged on the lower side surface of the prefabricated tie beam, the left side and the right side of the second waterproof board and the side edges of the two half sleeves are respectively and correspondingly provided with a pin joint lug and a pin shaft, and the second waterproof board and the two half sleeves are folded and formed through matched connection of the pin joint lug and the pin shaft.

Two third water proofing boards are outwards extended respectively in the left and right sides of notch by two half sleeves and form, wear to be equipped with the connecting rod perpendicularly in the face of third water proofing board, and eccentric pin hole has been seted up at the both ends of connecting rod, and it is equipped with the eccentric round pin axle to insert in eccentric round pin hole department, and the connecting rod passes left side third water proofing board, prefabricated tie beam and right side third water proofing board in proper order, and through rotating eccentric round pin axle with two third water proofing boards and prefabricated tie beam counter-pulling compress tightly.

In one embodiment, the pin shaft is vertically arranged at the position corresponding to the pin joint lug, a traction assembly is arranged at the top of the pin shaft, and the other end of the traction assembly extends upwards to be higher than the water level.

In one embodiment, the pin shaft is vertically arranged at the position corresponding to the pin joint lug, a traction assembly is arranged at the top of the pin shaft, and the other end of the traction assembly extends upwards to be higher than the water level; the eccentric pin shaft is vertically arranged at the eccentric pin hole corresponding to the eccentric pin shaft, the top of the eccentric pin shaft is also provided with a traction assembly, and the other end of the traction assembly extends upwards to be higher than the elevation of the water surface.

Compared with the prior art, the technical scheme of the invention at least has the following advantages and beneficial effects:

according to the invention, the tie beam and the sleeve are prefabricated on water, a waterproof measure between the prefabricated tie beam and the sleeve is made in advance, the sleeve is directly sleeved on the pile casing on the basis of the original pile foundation, the sleeve and the prefabricated tie beam are placed at the specified installation position, then bottom sealing and water pumping are carried out to form a waterless environment, the sleeve is used for replacing the pile casing to serve as a waterproof piece to carry out subsequent construction operation, the verticality of pile construction is ensured, the integral waterproof performance is improved, and the engineering quality is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic construction structure diagram of a construction method of a prefabricated underwater tie beam according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

FIG. 4 is a schematic structural view of a one-piece sleeve according to an embodiment of the present invention;

FIG. 5 is a schematic view of another construction structure of the construction method of the prefabricated underwater girt according to the embodiment of the present invention;

FIG. 6 is a schematic structural view of a segmented sleeve according to an embodiment of the present invention;

FIG. 7 is a schematic view of a connection structure between second sleeve bodies according to an embodiment of the present invention;

FIG. 8 is a schematic view of a waterproof structure provided in an embodiment of the present invention;

fig. 9 is an enlarged schematic view at C in fig. 8.

Icon: 1-sleeve, 11-first sleeve body, 12-second sleeve body, 121-first flange, 1211(1211a/1211b/1211c/1211d) -first split flange, 122-second flange, 1221(1221a/1221b) -second split flange, 13(13a/13b/13c/13d) -half-sleeve, 14(14a/14b/14c/14d) -pin lug, 15(15a/15b) -pin, 16-seal strip, 17-notch, 18-flange, 19-hollow plate, 2-precast tie beam, 21-precast tie beam end reinforcement, 3-casing, 4-waterproof construction, 41-first waterproof plate, 42-second waterproof plate, 43(43a/43b) -third waterproof plate, 44-waterproof filler, 45-connecting rod, 451-eccentric pin hole, 46-eccentric pin shaft, 461-mandrel, 462-eccentric part, 47-water stop strip, 5-traction component, 51-traction piece, 52-lifting ring, 6-bottom sealing concrete, 71-pile foundation, 72-column foundation, 8-water surface, 9-river bed and 91-bottom mud.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, a construction method of a prefabricated underwater tie beam will be more clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The preferred embodiment of the method of constructing prefabricated underwater stringers is shown in the accompanying drawings, however, the method of constructing prefabricated underwater stringers can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete in the construction of prefabricated, fabricated underwater tethers.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, when used in reference to an orientation or positional relationship indicated in the drawings, or as otherwise customary for use in the practice of the invention, are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

In the description of the present invention, it should be further noted that the terms "disposed," "mounted," "connected," and "connected" used herein should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The construction method provided by the invention is carried out under the condition that the underwater pile foundation or pier stud is formed, wherein the formed pile foundation or pier stud is drilled and founded by using the pile casing or other wall protection equipment, and the pile casing or other wall protection equipment is not removed. It should be understood that the present invention is intended to be described by way of example only, and not to be limited to practice on the basis of a casing, which is a relatively common pile-drilling wall protection apparatus, and that replacing a casing with another wall protection apparatus is also considered to be the claimed technical solution of the present invention. In addition, the casing and the sleeve provided by the invention generally refer to steel casings and steel sleeves with excellent waterproofness, compression resistance and corrosion resistance, and of course, the casing and the sleeve made of other materials which can meet the requirements of practical application also belong to the protection scope of the invention.

As shown in fig. 1, 2 and 5, an embodiment of the present invention provides a construction method of a prefabricated assembled underwater tie beam, including the following construction steps:

s1, forming the prefabricated tie beam 2 according to design requirements, preparing two groups of sleeves 1 which are matched with the prefabricated tie beam 2 and respectively and correspondingly installing the sleeves at two ends of the prefabricated tie beam 2, and making waterproof measures between the sleeves 1 and the prefabricated tie beam 2;

s2, sleeving the sleeve 1 loaded with the prefabricated tie beam 2 on the periphery of the pile casing 3 of the formed pile foundation 71 or the column foundation 72, descending the sleeve 1 along the pile casing 3, and keeping the top of the sleeve 1 higher than the elevation of the water surface 8 in the descending process;

s3, after the sleeve 1 is lowered to the prefabricated tie beam 2 to reach the specified installation position, pouring bottom sealing concrete 6 between the pile casing 3 and the sleeve 1, sealing the bottom of the sleeve 1, and evacuating the water body between the pile casing 3 and the sleeve 1;

s4, detaching the pile casing 3 along the top of the pile foundation 71, and carrying out steel bar installation and cast-in-place construction in the sleeve 1;

and S5, breaking the bottom sealing concrete 6, and removing and recycling the sleeve 1 to finish construction.

Specifically, the prefabricated tie beam 2 may be a prefabricated reinforced concrete structure tie beam, a reinforced concrete combined structure tie beam, or a steel structure tie beam, and the embodiment mainly takes a reinforced concrete structure tie beam as an example. The above mentioned corresponding to the precast tie beam 2 means that the sleeve 1 is used for the corresponding part of the precast tie beam 2, and can properly receive and load the precast tie beam 2. If the wall of the sleeve 1 is provided with a notch for installing the prefabricated tie beam 2, the size of the opening of the notch is slightly larger than the size of the cross section of the prefabricated tie beam 2, so that the prefabricated tie beam 2 can be placed and detached conveniently, and waterproof measures can be manufactured between the sleeve 1 and the prefabricated tie beam 2. Secondly, there is a certain distance between the bottom terminal surface of sleeve 1 and prefabricated tie beam 2, and preferred, the distance between the bottom terminal surface of sleeve 1 and the downside of prefabricated tie beam 2 is 50cm to the pouring and the shaping of back cover concrete 6 avoid influencing the construction between prefabricated tie beam 2 tip and pile top or the column top. And thirdly, the bottom sealing concrete 6 can adopt expansion mortar and is conveyed to the bottom of the sleeve 1 for bottom sealing by putting a pipeline between the pile casing 3 and the sleeve 1. Through prefabricating tie beam 2 and sleeve 1 on water to make the water-proof measure between prefabricated tie beam 2 and the sleeve 1, on original pile foundation 71's basis, directly establish sleeve 1 and transfer appointed mounted position with sleeve 1 and prefabricated tie beam 2 on protecting a section of thick bamboo 3, take out water at the back cover again and form anhydrous environment, replace protecting a section of thick bamboo 3 with sleeve 1 and carry out follow-up construction operation as waterproof, both guaranteed the vertical degree of stake construction, improved whole waterproof performance again, guaranteed engineering quality.

Further, as shown in fig. 1 and 5, since the construction of the underwater tie beam includes two types of the ground tie beam between the pile foundations and the waist tie beam between the pile foundations, and since the ground tie beam needs to be buried in the riverbed 9, and the riverbed 9 needs to be excavated, the lowering depth of the sleeve 1 and the arrangement manner of the precast tie beam 2 may be different according to the arrangement orientation of the tie beam, and thus, the cast-in-place construction includes, but is not limited to, the following two types of operations:

firstly, when a ground tie beam is installed between pile foundations 71, the method comprises the cast-in-place construction operations of binding pile top steel bars and prefabricated tie beam end steel bars 21, building templates to pour pile beam end concrete, building templates to pour pier column concrete, removing templates and the like.

Secondly, when the waist tie beam is arranged between the columns, the method comprises the steps of binding the steel bars at the top of the columns and the steel bars 21 at the end part of the prefabricated tie beam, setting up concrete at the beam end of the template pouring column, setting up pier column concrete on the template pouring tie beam, removing the template and the like.

Further, as shown in fig. 2 and 3, the reinforcing steel bars are reserved at the end parts of the prefabricated tie beams 2 to be continuously bound with the pile top reinforcing steel bars or the column top reinforcing steel bars, so that the distance between the sleeve 1 and the pile casing 3 is not less than 15CM, a placing space at the end part of the prefabricated tie beam 2 is reserved, and the sleeve 1 is convenient to put down. Preferably, the distance between the sleeve 1 and the protective sleeve 3 is 20CM, so that enough space can be reserved for placing the prefabricated tie beam 2, and the situation that the reinforcing steel bars 21 at the end part of the prefabricated tie beam are too short and are difficult to bind is avoided; secondly, reduce the interval between sleeve 1 and the pile casing 3 as far as possible to reduce the volume of back cover concrete 6, both can avoid back cover concrete 6 dead weight too big to increase and bear the weight of mechanism burden, can also make things convenient for follow-up demolish work of implementing back cover concrete 6.

Further, as shown in fig. 1, 2 and 8, the bottom of the sleeve 1 is formed with a rib 18 inward; in step S2, after the sleeve 1 is lowered to the prefabricated tie beam 2 to reach the designated installation position, a hollow plate 19 is sleeved on the periphery of the casing 3, the hollow plate 19 is of a hollow annular structure, the inner diameter of the hollow plate 19 is slightly larger than the outer wall of the casing 3, the hollow plate 19 is lowered to the bottom of the sleeve 1 along the outer side wall of the casing 3, the hollow plate 19 is erected on the retaining edge 18, then the bottom sealing concrete 6 is poured, the bottom sealing concrete 6 is blocked by the hollow plate 19 and the retaining edge 18 in a matching manner, a gap between the bottom of the sleeve 1 and the casing 3 is closed after the bottom of the sleeve 1 is molded, and then a water body between the casing 3 and the sleeve 1 is evacuated, so that a water-free environment can be formed in the sleeve 1 for subsequent construction. Specifically, the rib 18 may be formed by extending the bottom edge of the sleeve 1 inward, or may be formed by connecting other intermediate connectors extending inward of the sleeve 1, the rib 18 may be in the shape of a ring extending along the inner wall of the sleeve 1, or may be formed by a plurality of individual bodies dispersedly arranged in a ring shape, and the length of the rib 18 is smaller than the distance between the casing 3 and the sleeve 1, so as to avoid collision with the casing 3 and interference.

Further, as shown in fig. 1, 4, 7 and 8, the sleeve 1 may be an integral sleeve, which includes a first sleeve body 11, the first sleeve body 11 is formed by a pair of half sleeves 13 in a butt joint manner, a plurality of sets of pin lugs 14 and pin shafts 15 are correspondingly arranged at the butt joint positions of the two sides of the two half sleeves 13, and the two half sleeves 13 are folded and formed by the matching connection of the pin lugs 14 and the pin shafts 15; sealing strips 16 are arranged at the involutive connection positions of the two half sleeves 13, and the sealing strips 16 are extruded to form sealing after the two half sleeves 13 are folded; a notch 17 for placing the prefabricated tie beam 2 is formed in the involution connection position of one side of the lower parts of the two half sleeves 13, and the end part of the prefabricated tie beam 2 extends into the notch 17 to be tightly connected with the first sleeve body 11; a waterproof structure 4 is arranged between the notch 17 and the precast tie beam 2. After the construction is finished, only the pin shaft 15 needs to be pulled away, the fixation between the two half sleeves 13 can be released, the two half sleeves 13 are separated left and right, the first sleeve body 11 is dismantled, the whole disassembly is convenient and fast, and the construction efficiency is greatly improved.

Specifically, the steps of mounting the first sleeve body 11 and the precast tie beam 2 are as follows:

firstly, the two half sleeves 13 are in a separated state, and one end part of the prefabricated tie beam 2 is inserted into the notch 17 for placement; secondly, at the involutive connection part at one side of the two half sleeves 13, which is not provided with the notch 17, the pin shaft 15 is spliced with the correspondingly arranged pin joint lug 14, so that the two half sleeves 13 rotate along the pin shaft 15 to be correspondingly folded, and the prefabricated tie beam 2 is clamped; then, a waterproof structure 4 is arranged between the groove opening 17 and the prefabricated tie beam 2; finally, at the involutive connection position of the side of the notch 17, the pin shaft 15 is inserted into the corresponding pin joint lug 14, so that the two half sleeves 13 are tightly folded, the two half sleeves 13 are correspondingly folded, and the sealing strips 16 correspondingly arranged at each position are compressed, thereby realizing effective sealing and finishing the installation of the prefabricated tie beam 2 at the first sleeve body 11. Preferably, the pinning lugs 14 are arranged on the outer cylinder wall of the half-cylinder 13, avoiding interference with the cylinder. Preferably, waterproof structure 4 can set up the inboard at notch 17 to reduce the area of contact with the barrel outside water, slow down the corrosion rate of water to waterproof structure 4.

The dismantling steps of the first sleeve body 11, the pile casing 3 and the prefabricated tie beam 2 can be as follows:

firstly, pin shafts 15 at the joint of two sides of the two half sleeves 13 are sequentially pulled away from bottom to top; in a second step, the two sleeve halves 13 are separated towards their edges to complete the removal. The mode of sequentially pulling away the pin shaft 15 from bottom to top is adopted, so that the two half sleeves 13 can be prevented from being separated towards two sides due to the action of gravity, and the pin shaft 15 is difficult to pull away due to pretightening force generated between the pin shaft 15 and the pin joint lug 14 below; subsequently, the two half sleeves 13 are separated to the two sides, and the back concrete 6 can be torn and broken by the self-weight of the two half sleeves 13.

The dismantling steps of the first sleeve body 11, the pile casing 3 and the prefabricated tie beam 2 can also be as follows:

firstly, sequentially drawing the pin shafts 15 from bottom to top at the involutory connection part at one side of the notch 17; secondly, sequentially drawing the pin shafts 15 from bottom to top at the involutive connection part at the other sides of the two half sleeves 13; third, the two half-sleeves 13 are separated to the two sides to complete the dismantling. When the effect is achieved, the step-by-step dismantling can be carried out according to the construction depth. When carrying out shallow water construction, first sleeve body 11 bottom pressure is less, and the volume of back cover concrete 6 is less, and the adhesion strength of back cover concrete 6 to first sleeve body 11 is also less, carries out first step back, can open two halves sleeve 13 from notch 17 place side and separate in order to accomplish and demolish. When deep water construction is carried out, the pressure at the bottom of the first sleeve body 11 is large, the volume of the bottom sealing concrete 6 is large, the bonding force of the bottom sealing concrete 6 to the first sleeve body 11 is also large, at the moment, after the pin shaft 15 is completely pulled out, the two half sleeves 13 are separated towards the two sides where the two half sleeves are located, and the bottom sealing concrete 6 can be torn and broken by utilizing the dead weight of the two half sleeves 13.

Of course, if the volume of the bottom-sealed concrete 6 is too large, the bottom-sealed concrete 6 cannot be torn or damaged by the self-weight of the two half sleeves 13, and the pile body may be damaged, the bottom-sealed concrete 6 may be vibrated and crushed, and then the first sleeve body 11 may be removed.

Further, as shown in fig. 5 to 8, the sleeve 1 is a segmented sleeve, which includes a plurality of segments of second sleeve bodies 12 connected in sequence; the second sleeve body 12 is formed by a pair of half sleeves 13 in a matching way, a plurality of groups of pin connection lugs 14 and pin shafts 15 are correspondingly arranged at the matching connection positions of the two sides of the two half sleeves 13, and the two half sleeves 13 are folded and formed through matching connection of the pin connection lugs 14 and the pin shafts 15; sealing strips 16 are arranged at the involutive connection positions of the two half sleeves 13, and the sealing strips 16 are extruded to form sealing after the two half sleeves 13 are folded; the bottom second sleeve body 12 at the lowest end is provided with a notch 17 for arranging the prefabricated tie beam 2 at the involution joint of the middle sections of the two half sleeves 13, and the end part of the prefabricated tie beam 2 extends into the notch 17 to be tightly connected with the second sleeve body 12; a waterproof structure 4 is arranged between the notch 17 and the precast tie beam 2. The sectional sleeve 1 is adopted as the sleeve 1, so that the purposes of quick disassembly and construction efficiency improvement can be achieved, the sleeve 1 can be connected section by section for lowering when being lowered, the erection height of a hoisting tool during deepwater construction is reduced, and the sleeve 1 is more accurately placed and positioned; the number of the required second sleeve bodies 12 can be selected according to the construction depth, the applicability is stronger, and the storage and the transportation are convenient.

It will be understood that the second sleeve body 12 differs from the first sleeve body 11 only in the integral and split connection, and therefore the step of mounting the second sleeve body 12 to the prefabricated tie beam 2, and the step of removing the second sleeve body 12 from the casing 3 and the prefabricated tie beam 2, are substantially different from the step of mounting and removing the first sleeve body 11, and will not be described in detail herein.

Further, as shown in fig. 6 and 7, a first flange 121 is disposed at an upper end of the second sleeve body 12, a second flange 122 is disposed at a lower end of the second sleeve body 12, and the second sleeve bodies 12 are connected in sequence by butting the first flange 121 and the second flange 122; the first flange 121 includes two first split flanges 1211 (e.g., first split flanges 1211a and 1211b, and first split flanges 1211c and 1211d), the two first split flanges 1211 are respectively disposed at the upper ends of the two half sleeves 13 (e.g., the first split flanges 1211a and 1211b are disposed at the upper ends of the two half sleeves 13a and 13b, the first split flanges 1211c and 1211d are disposed at the upper ends of the two half sleeves 13c and 13d), and the two first split flanges 1211 are folded when the two half sleeves 13 are folded; the second flange 122 includes two second split flanges 1221 (for example, second split flanges 1221a and 1221b), the two second split flanges 1221 are respectively and correspondingly disposed at the lower ends of the two half sleeves 13 (for example, the second split flanges 1221a and 1221b are disposed at the lower ends of the two half sleeves 13a and 13 b), and the two second split flanges 1221 are correspondingly folded when the two half sleeves 13 are folded; sealing strips 16 are respectively arranged between the first flange 121 and the second flange 122, at the joint of the two first split flanges 1211 and at the joint of the two second split flanges 1221, and the sealing strips 16 are extruded to form sealing after the first flange 121 and the second flange 122 are butted, or after the two first split flanges 1211 are correspondingly folded, or after the two second split flanges 1221 are correspondingly folded.

Specifically, the above-mentioned second sleeve bodies 12 are connected in sequence by the first flange 121 and the second flange 122 in a butt joint manner, which means that the first flange 121 of the second sleeve body 12 located below (for example, the

first split flanges

1211c and 1211d at the two

half sleeves

13c and 13d) is connected with the second flange 122 of another second sleeve body 12 located above (for example, the

second split flanges

1221a and 1221b at the two

half sleeves

13a and 13 b) by bolts, and several second sleeve bodies 12 are connected in sequence in this way to form the sleeve 1.

Further, as shown in fig. 3, 8 and 9, the waterproof structure 4 includes a first waterproof board 41, a second waterproof board 42 and two third waterproof boards 43;

the first waterproof plate 41 is fixedly arranged on the upper side surface of the prefabricated tie beam 2, and waterproof filler 44 is filled between the first waterproof plate 41 and the notch 17; the gap between the first waterproof plate 41 and the sleeve 1 is filled and sealed through the waterproof filler 44, and effective sealing connection between the upper side of the prefabricated tie beam 2 and the sleeve 1 is achieved. Specifically, the waterproof packing 44 can be made of expansion mortar or other flexible waterproof materials, so that the adhesion with the sleeve 1 is reduced, the influence on the separation of the half sleeve 13 is avoided, and the waterproof packing 44 can be conveniently detached after the construction in the sleeve is finished, so that the separation of the half sleeve 13 is smoother. When the prefabricated tie beam 2 is arranged at the notch 17, the height of the first waterproof plate 41 is slightly higher than that of the upper side face of the notch 17, so that the height of the waterproof filler 44 is higher than that of the upper side face of the notch 17 when the waterproof filler 44 is filled, a gap between the first waterproof plate 41 and the half sleeve 13 is effectively and completely filled, waterproof strength can be achieved, and the prefabricated tie beam can be conveniently detached.

The second waterproof board 42 is fixedly arranged on the lower side surface of the prefabricated tie beam 2, at the moment, the notch 17 can penetrate downwards to the bottom of the half sleeve 13, the left side and the right side of the second waterproof board 42 and the side edges of the two half sleeves 13 are respectively and correspondingly provided with a pin joint lug 14 (such as a pin joint lug 14a, a pin joint lug 14b, a pin joint lug 14c, a pin joint lug 14d) and a pin shaft 15 (such as a pin shaft 15a, a pin shaft 15b), and the second waterproof board 42 and the two half sleeves 13 are folded and formed through matched connection of the pin joint lug 14 and the pin shaft 15 (such as a pin joint lug 14a, a pin joint lug 14b, a pin shaft 15a, a pin joint lug 14c, a pin joint lug 14d and a pin shaft 15 b); sealing strips 16 are arranged at the involutive connection positions of the second waterproof board 42 and the two half sleeves 13, and the sealing strips 16 are extruded to form sealing after the two half sleeves 13 are folded with the second waterproof board 42; the second waterproof plate 42 arranged on the lower side of the prefabricated tie beam 2 is connected with the two half sleeves 13 through the pin joint lugs 14 and the pin shafts 15, the two half sleeves 13 and the second waterproof plate 42 are correspondingly folded, and then the sealing strips 16 between the two half sleeves are compressed, so that effective sealing between the lower side of the prefabricated tie beam 2 and the sleeve 1 is realized. Specifically, the second waterproof sheet 42 is integrally formed with the prefabricated tie beam 2, the second waterproof sheet 42 can be regarded as a part fixedly arranged on the prefabricated tie beam 2 and used for forming the sleeve 1, the second waterproof sheet 42 is arranged, the sealing relation between the lower side of the sleeve 1 and the prefabricated tie beam 2 can be converted into the sealing relation between the second waterproof sheet 42 and the half sleeve 13, the second waterproof sheet 42 and the half sleeve 13 are sealed, and effective sealing between the lower side of the prefabricated tie beam 2 and the sleeve 1 can be achieved. The second waterproof board 42 may be a horizontal board, or an arc board with the same radian as the half-sleeve 13, and the thickness of the second waterproof board 42 is the same as that of the half-sleeve 13, so as to be stably connected with the half-sleeve 13; the width of the second waterproof board 42 can be consistent with that of the prefabricated tie beam 2, so that two sides of the groove opening 17 in the horizontal direction can extend downwards in a straight line, a corner is avoided, the arrangement of the sealing strip 16 is convenient, the positions of the pin joint lug 14 and the pin shaft 15 on two sides of the second waterproof board 42 are prevented from being shielded by the prefabricated tie beam 2, and the installation and the disassembly of the pin shaft 15 are convenient; the bottom of the second waterproof plate 42 is flush with the bottom of the half sleeve 13, so that the heights of the bottoms of the sleeves 1 are consistent, and the subsequent construction in the sleeves is facilitated; after the construction in the barrel is finished, the pin shaft 15 is pulled out, the two half sleeves 13 are separated from the second waterproof board 42, and the second waterproof board 42 can not be detached, so that the structural strength is not influenced.

The two third water-proofing plates 43 are formed by extending the two half sleeves 13 outwards respectively at the left side and the right side of the notch 17 (such as the third water-proofing plate 43a and the third water-proofing plate 43b), a connecting rod 45 vertically penetrates through the plate surface of the third water-proofing plate 43, two ends of the connecting rod 45 are provided with eccentric pin holes 451, eccentric pin shafts 46 are inserted in the eccentric pin holes 451, the eccentric pin shafts 46 are similar to a cam structure and comprise a mandrel 461 and an eccentric part 462, the mandrel 461 is inserted in the eccentric pin holes 451, the eccentric part 462 can abut against the plate surface of the third water-proofing plate 43 and extrude the third water-proofing plate 43 when the connecting rod turns to a certain angle, the connecting rod 45 sequentially penetrates through the left third water-proofing plate 43, the prefabricated tie beam 2 and the right third water-proofing plate 43, and the two third water-proofing plates 43 and the prefabricated tie beam 2 are oppositely pulled and compressed by rotating the eccentric pin shafts 46; be equipped with sealing rod 47 between third water proof plate 43 and prefabricated straining beam 2, sealing rod 47 can be the rubber waterstop that meets water inflation, and two third water proof plates 43 fold back with prefabricated straining beam 2 and extrude sealing rod 47 fixed, and sealing rod 47 expands after getting into the water and contacting with the water, is full of the clearance between third water proof plate 43 and the prefabricated straining beam 2 and forms sealedly to possess good waterproof performance.

Further, as shown in fig. 1, 5, 8 and 9, the pin 15 is vertically disposed at the corresponding pin lug 14 to be perpendicular to the separation direction of the half sleeve 13, so as to achieve the purpose of effective fastening and accurate positioning; and the top of round pin axle 15 is equipped with pulls subassembly 5, the other end of pulling subassembly 5 upwards extends to 8 elevations above the surface of water, pull subassembly 5 includes a plurality of traction piece 51, each round pin axle 15 corresponds sets up a traction piece 51, explain with the example of the steel cable as traction piece 51, tie up steel cable one end at the tip of round pin axle 15, the tip of round pin axle 15 can set up rings 52, in order to tie up the steel cable in rings 52 department, form firm connection, the other end of steel cable stretches out the surface of water 8, operate the steel cable above the surface of water 8 in order to take out from round pin axle 15, realize the dismantlement on water of sleeve 1 laborsavingly fast. It will be understood that the pulling assembly 5 can be composed of one pulling member 51, or of a plurality of pulling members 51; when one pulling member 51 is considered as one pulling assembly 5, each pin 15 can be independently operated; when a plurality of traction pieces 51 are regarded as one traction assembly 5, a plurality of pin shafts 15 can be operated at one time, if a plurality of pin shafts 15 are divided into a lower pin shaft group, a middle pin shaft group and an upper pin shaft group according to wading depth, one end of each traction piece 51 in each pin shaft group, which extends out of the water surface 8, can be integrated into one traction assembly 5, and the traction assembly 5 is operated to simultaneously pull out a plurality of pin shafts 15 in one group, so that the construction efficiency is improved.

Further, as shown in fig. 1, 5, 8 and 9, the eccentric pin 46 is vertically disposed at the corresponding eccentric pin hole 451, and the top of the eccentric pin 46 is also provided with the traction assembly 5, and the other end of the traction assembly 5 extends upwards to a level higher than the water surface 8 so as to be drawn out of the eccentric pin 46 on the water. It is understood that the arrangement, the selection of the number of the arrangement and the classification of the components of the traction assembly 5 at the eccentric pin 46 are practically the same as those of the traction assembly 5 at the pin 15, and are not further described herein; the end of the eccentric pin shaft 46 can also be provided with a hanging ring 52 so as to tie the traction assembly 5 at the hanging ring 52 to form stable connection, and then the traction assembly 5 is operated to be drawn away from the eccentric pin shaft 46, thereby achieving the purpose of quickly, labor-saving and conveniently disassembling the sleeve 1.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method of a prefabricated underwater tie beam is characterized by comprising the following construction steps:

s5, breaking the bottom sealing concrete, and dismantling and recycling the sleeve to finish construction;

the sleeve is formed by a pair of half sleeves in an involutive mode, a plurality of groups of pin connection lugs and pin shafts are correspondingly arranged at the position where the two half sleeves are in the involutive mode at the involutive connection position, and the two half sleeves are folded and formed through the matched connection of the pin connection lugs and the pin shafts; the pin shaft is vertically arranged at the pin joint lug corresponding to the pin shaft, a traction assembly is arranged at the top of the pin shaft, and the other end of the traction assembly extends upwards to be higher than the elevation of the water surface;

a flange is formed inwards at the bottom of the sleeve; in step S2, after the sleeve is lowered to the prefabricated tie beam and reaches the designated installation position, a hollow plate is sleeved on the periphery of the casing, the hollow plate is lowered to the bottom of the sleeve along the outer side wall of the casing, the hollow plate is erected on the retaining edge, and then bottom sealing concrete is poured;

the sleeve is an integral sleeve and comprises a first sleeve body, the first sleeve body is formed by a pair of half sleeves in an involutive mode, a plurality of groups of pin joint lugs and pin shafts are correspondingly arranged at the two involutive connection positions of the two half sleeves, and the two half sleeves are folded and formed through the matched connection of the pin joint lugs and the pin shafts; a notch for placing a prefabricated tie beam is formed in a joint of the lower parts of the two half sleeves, and the end part of the prefabricated tie beam extends into the notch to be tightly connected with the first sleeve body; and a waterproof structure is arranged between the notch and the prefabricated tie beam.

2. The method of constructing a prefabricated underwater gird according to claim 1, wherein the cast-in-place construction comprises:

3. The method of constructing a prefabricated underwater gird according to claim 2, wherein a distance between the sleeve and the casing is not less than 15 CM.

4. The construction method of the prefabricated underwater gird according to claim 1, wherein the sleeve is a segmented sleeve comprising a plurality of sequentially connected second sleeve bodies; the second sleeve body is formed by a pair of half sleeves in an involutive mode, a plurality of groups of pin connection lugs and pin shafts are correspondingly arranged at the position where the two half sleeves are in the involutive mode at the involutive connection position, and the two half sleeves are folded and formed through the matched connection of the pin connection lugs and the pin shafts; a notch for placing a prefabricated tie beam is formed in a joint of the middle sections of the two half sleeves of the second sleeve body at the bottom of the lowest end, and the end part of the prefabricated tie beam extends into the notch to be tightly connected with the second sleeve body; and a waterproof structure is arranged between the notch and the prefabricated tie beam.

5. The construction method of the prefabricated underwater gird according to claim 4, wherein a first flange is arranged at the upper end of the second sleeve body, a second flange is arranged at the lower end of the second sleeve body, and the second sleeve bodies are connected in sequence through butt joint of the first flange and the second flange; the first flanges comprise two first split flanges which are respectively and correspondingly arranged at the upper ends of the two half sleeves, and the two first split flanges are correspondingly folded when the two half sleeves are folded; the second flanges comprise two second split flanges, the two second split flanges are respectively and correspondingly arranged at the lower ends of the two half sleeves, and the two second split flanges are correspondingly folded when the two half sleeves are folded.

6. The construction method of the prefabricated underwater girt according to any one of claims 1 to 4, wherein the waterproof structure comprises a first waterproof sheet, a second waterproof sheet and two third waterproof sheets;

the first waterproof plate is fixedly arranged on the upper side face of the prefabricated tie beam, and waterproof filler is filled between the first waterproof plate and the notch;

the second waterproof plate is fixedly arranged on the lower side surface of the prefabricated tie beam, the left side and the right side of the second waterproof plate and the side edges of the two half sleeves are respectively and correspondingly provided with a pin joint lug and a pin shaft, and the second waterproof plate and the two half sleeves are folded and formed through matched connection of the pin joint lug and the pin shaft;

two the third water proofing board is outwards extended respectively in the left and right sides of notch by two half sleeves and forms, in the connecting rod is worn to be equipped with perpendicularly by the face of third water proofing board, and eccentric pin hole has been seted up at the both ends of connecting rod, and it is equipped with eccentric round pin axle to insert in eccentric round pin hole department, and the connecting rod passes left side third water proofing board, prefabricated tie beam and right side third water proofing board in proper order, through rotating eccentric round pin axle with two third water proofing board and prefabricated tie beam are to drawing and are compressed tightly.

7. The construction method of the prefabricated underwater tie beam according to claim 6, wherein the pin shaft is vertically arranged at the pin joint lug corresponding to the pin shaft, a traction assembly is arranged at the top of the pin shaft, and the other end of the traction assembly extends upwards to be higher than the water level; the eccentric pin shaft is vertically arranged at the eccentric pin hole corresponding to the eccentric pin shaft, the top of the eccentric pin shaft is also provided with a traction assembly, and the other end of the traction assembly extends upwards to be higher than the elevation of the water surface.