CN108708296B - Crab claw type deviation rectifying device arranged at bottom of bridge pier and construction process - Google Patents

Abstract

The invention relates to the technical field of bridge construction, in particular to a deviation rectifying device for a pier and a construction process. The invention provides a crab claw type deviation correcting device arranged at the bottom of a pier and a construction process, wherein a crab claw type reinforcing body comprises a fixed column on the pier, a guard plate is connected to a fixed part, the fixed part is connected with a sliding part, a seat body of the sliding part is connected with an arc-shaped body which is bent downwards, the arc-shaped body is connected with a crab claw part, the crab claw part comprises a movable crab claw and a fixed crab claw, the tip of the crab claw is arranged in a positioning groove, and the crab claw part is connected with the movable crab claw; the first valve on the oil supply and oil discharge pipeline of the hydraulic device in the sliding part controls the piston rod to move, the movable crab clamp and the fixed crab clamp are of inverted V-shaped structures, and a plurality of crab teeth are arranged on the inner side of the fixed crab clamp. The crab claw type deviation rectifying device at the bottom of the pier is reasonable in structure, convenient to disassemble and install, capable of effectively rectifying deviation of the pier, obvious in effect, simple in construction process and short in construction period.

Description

Crab claw type deviation rectifying device arranged at bottom of bridge pier and construction process

Technical Field

The invention belongs to the technical field of bridge construction, and particularly relates to a crab claw type deviation rectifying device arranged at the bottom of a bridge pier and a construction process.

Background

The pier is an indispensable part in bridge construction and mainly comprises an abutment and a pier column. The pier and the pier column are main structures for supporting the bridge span, not only bear all loads transmitted by the bridge span structure, but also directly bear various loads such as soil pressure, water flow impact force, ice pressure, ship impact force and the like, so that the pier body and the pier body have enough strength, rigidity and stability. However, in many of the piers after bridge construction, a phenomenon in which the pier is inclined individually occurs. At present, the following methods are generally adopted in construction to eliminate various acting forces for tilting the pier: 1) temporarily solidifying the upper structures of all bridge spans in the opposite direction of the deviation rectification of the pier to be rectified to form a stressed whole; 2) installing a jacking device at the top of the pier to be rectified, and jacking the upper beam body by the jacking device; 3) arranging a reaction frame and a deviation rectifying jack between the pier to be rectified and the beam body on the pier to be rectified, transversely pushing the upper beam body by the deviation rectifying jack, and pushing the pier to be rectified to a vertical position by the reaction force generated by pushing the upper beam body; and finally, restoring the original state.

However, the method has long construction period, complex installation process, poor effect of rectifying the pier and high cost.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the crab claw type deviation rectifying device arranged at the bottom of the pier and the construction process, through the crab claw type deviation rectifying device and the construction process, the deviation of the pier which is inclined is effectively rectified, the construction period is shortened, the installation process is simplified, the maintenance and deviation rectifying efficiency of the pier is improved, and the construction cost of the deviation rectifying pier is reduced.

In order to achieve the above purpose, the crab pincer type deviation correcting device provided by the invention comprises a plurality of crab pincer type reinforcing bodies which are annularly arranged, one end of each crab pincer type reinforcing body is connected to the outer side of a pier stud, the other end of each crab pincer type reinforcing body is connected with a reinforcing body, each crab pincer type reinforcing body comprises a fixing column which is fixedly inserted into a blind hole on the pier stud, the fixing column is fixedly connected to a protection plate which is corresponding to the outer side of the pier stud in shape, the protection plate is connected to a fixing part, the fixing part is connected with a sliding part for adjusting the horizontal position, a seat body which is obliquely arranged upwards is arranged on the sliding part, the seat body is connected with an arc-shaped body which is bent downwards, the arc-shaped body is connected with a crab clamping part, and the crab clamping part comprises a movable crab pincer and a fixed crab pincer which are connected through a first rotating shaft, crab clamp tips on the movable crab clamp and the fixed crab clamp are arranged in positioning grooves on the reinforcing body, and holes arranged on the crab clamping part are connected with the movable crab clamp through fixing pin shafts; the hydraulic device is arranged on the outer side of the sliding part, the oil supply of the hydraulic device and a piston rod which is arranged on an oil discharge pipeline and is used for controlling the piston rod to reciprocate in the oil cylinder are arranged, and the end of the piston rod is connected with a second rotating shaft on the crab clamp.

According to the preferable technical scheme, the movable crab clamp and the fixed crab clamp are of inverted V-shaped structures, and a plurality of crab teeth are arranged on the inner side of the fixed crab clamp.

According to the preferable technical scheme, the end positions in the crab pincer tips of the movable crab pincer and the fixed crab pincer are respectively provided with a lifting piston, the lifting pistons are controlled by a first lifting oil cylinder and a second lifting oil cylinder to move back and forth, the first lifting oil cylinder and the second lifting oil cylinder and a hydraulic branch pipeline arranged on an oil supply and oil discharge pipeline of a hydraulic device are respectively used for controlling the second lifting oil cylinder and the first lifting oil cylinder of the crab pincer tips arranged on the movable crab pincer and the fixed crab pincer to move up and down, and a second valve arranged on the hydraulic branch pipeline is used for controlling the second lifting oil cylinder and the first lifting oil cylinder of the crab pincer tips arranged.

According to the preferable technical scheme, the fixing part and the sliding part are of a mutual insertion structure, and the insertion structure is fixedly connected through a fixing bolt.

According to the preferable technical scheme, the reinforcing body is of a circular structure or an oval structure.

According to the preferable technical scheme, the reinforcing body is provided with a supporting groove, and the positioning groove is formed in the supporting groove.

According to the preferable technical scheme, the angle range of a third included angle formed by the sliding part and the base body is 30-40 degrees, the angle range of a first included angle formed by the arc-shaped body is 110-135 degrees, and the angle range of a second included angle formed between the crab clamping part and the crab fixing pincers is 135-155 degrees.

Preferably, the third included angle is 30 °, 35 ° or 40 °, the first included angle is 110 °, 115 °, 120 ° or 135 °, and the second included angle is 135 °, 140 °, 145 ° or 155 °.

The invention also provides a construction process of the crab claw type deviation rectifying device arranged at the bottom of the pier, and the construction process comprises the following steps:

step 1) arranging cofferdams around piers, cleaning the cofferdams by using an excavating machine, exposing the lower parts of piers and abutments of the piers, probing the outer sides of the abutments, pre-embedding and fixing prefabricated reinforcing bodies after finding a solid foundation, arranging support grooves on the reinforcing bodies, arranging more than two reinforcing bodies with an assembling structure, and fixedly assembling the more than two reinforcing bodies;

step 2) inserting the fixed column fixedly connected to the guard plate into a blind hole in the pier column in an interference fit manner, smoothly inserting and fixing the fixed column by using an upward inclination angle arranged on an opening of the blind hole, and then fixedly connecting the sliding part with the fixed part of the guard plate by screwing a fixed bolt;

step 3) putting the crab claw tips on the fixed crab claws into the inner side positioning grooves, extending or contracting the piston rods on the oil cylinders to a proper position by using a control device of the hydraulic device, and simultaneously putting the crab claw tips on the movable crab claws into the outer side positioning grooves to fix corresponding angles and positions, and then penetrating the fixing pin shafts into holes formed in the crab claw parts to be fixedly connected, so that the movable crab claws and the crab claw parts are firmly fixed;

step 4) opening a second valve switch to enable the second lifting oil cylinder and the lifting piston on the first lifting oil cylinder to extend out, performing position correction and correction on the pier, and closing the second valve when the pier is corrected to a proper position;

step 5) excavating and cleaning the inclined side of the pier and the pier pile by using an excavating machine, searching inclination reasons, removing inclination factors or pouring concrete on the excavated part, wherein the concrete pouring depth is greater than or equal to the maximum width of the pier column, and simultaneously curing the poured concrete after the concrete pouring;

and 6) after the poured concrete is completely solidified, removing the crab claw type deviation correcting device.

According to the preferable technical scheme, the construction process is characterized in that three-layer cooling maintenance is carried out on the poured concrete in the step 5), and the three-layer cooling maintenance step comprises the following sub-steps:

step 1) paving a first heat preservation layer on concrete poured on the surface, paving a first crushed ice layer with the thickness range of 10-15mm on the first heat preservation layer, wherein the particle range of the first crushed ice layer is 5-8mm, and then paving a second heat preservation layer on the crushed ice layer;

spreading a second crushed ice layer with the thickness range of 15-20mm on the second heat-insulating layer in the step 2), wherein the particle range of the second crushed ice layer is 10-15mm, and then laying a third heat-insulating layer on the second crushed ice layer;

spreading a third crushed ice layer with the thickness range of 20-30 mm on the third heat-insulating layer in the step 3), wherein the particle range of the third crushed ice layer is 15-20mm, and finally wrapping a fourth heat-insulating layer on the third crushed ice layer.

Compared with the prior art, the invention has the following beneficial effects:

1. the crab claw type deviation rectifying device arranged at the bottom of the pier is reasonable in structure and convenient to detach and install.

2. The method has the advantages of more obvious and controllable deviation rectifying construction effect on the bridge pier, more convenient construction and short construction period.

3. The crab claw type deviation rectifying device can be used repeatedly, and is lower in cost.

Drawings

FIG. 1 is a structural view of a crab claw type deviation rectifying device of the present invention installed at the bottom of a pier;

FIG. 2 is a top view of the structure of FIG. 1 with the solids added;

FIG. 3 is an internal structural view of the crab-claw type reinforcement body of FIG. 1;

FIG. 4 is an enlarged view of the internal structure at point A in FIG. 1;

fig. 5 is a top view of another structure of the stiffened body of fig. 1.

Reference numerals

In the figure: b is a first included angle, C is a second included angle, D is a third included angle, 1-abutment; 2-pier stud, 201-blind hole, 202-tilt-up angle; 3-bridge plate; 4-crab claw type reinforced body, 401-fixed column, 402-guard plate, 403-hydraulic device, 404-arc body, 405-first valve, 406-crab claw part, 407-first rotating shaft, 408-piston rod, 409-second rotating shaft, 410-movable crab claw, 411-first lift cylinder, 412-crab claw tip, 413-fixed pin shaft, 414-crab tooth, 415-lift piston, 416-second lift cylinder, 417-fixed crab claw, 418-hydraulic branch pipe, 419-cylinder, 420-second valve, 421-seat, 422-sliding part, 423-fixed part, 424-fixed bolt; 5, supporting the groove; 6-reinforcing body; 7-pile piling; 8-positioning groove.

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1-4, the crab-claw type deviation rectifying device provided by the invention is arranged at the positions of the abutment 1 and the pier stud 2, wherein the pier comprises the abutment 1 arranged below the pier stud 2, the pier stud 7 for fixing the pier is arranged below the abutment 1, and the upper surface of the pier stud 2 is fixedly connected with the bridge plate 3. Wherein, crab-claw shape deviation correcting device's spare part is the steel construction, and crab-claw shape deviation correcting device's concrete structure includes that a plurality of annular arranges crab-claw shape on pier stud 2 and consolidates body 4, and the quantity of crab-claw shape reinforcement body 4 is according to position and the inclination degree that the pier takes place to incline and specifically sets up. In this embodiment, the quantity that body 4 was consolidated to the crab pincers type is 6, and body 4 is consolidated to the crab pincers type also evenly sets up on the reinforcement body 6 of circular structure according to the ring type, still is equipped with supporting groove 5 on the reinforcement body 6, and constant head tank 8 sets up in supporting groove 5, and constant head tank 8 is more than two at least, and constant head tank 8 is mated relative setting structure. Wherein, the one end of every crab-claw-shaped reinforcing body 4 is connected in the outside of pier stud 2, the other end setting of crab-claw-shaped reinforcing body 4 is on strengthening the body 6, fixed column 401 on crab-claw-shaped reinforcing body 4 is fixed for the grafting structure with blind hole 201 on the pier stud 2, fixed column 401 is cylinder shape or hexagonal structure, in order to make fixed column 401 insert the blind hole 201 smoothly, be provided with ascending upward inclination 202 on the opening part of blind hole 201, blind hole 201 is equipped with big opening promptly, the effect of playing is that can more smoothly confirm the position of fixed column 401 and insert smoothly. Wherein, the fixed column 401 is circular cylinder or rectangular cylinder, and its other end rigid coupling is on the backplate 402 corresponding with 2 outside shapes of pier stud, and pier stud 2 and backplate 402 are the arc structure, and the backplate 402 of arc structure enables it to wrap up in the pier stud 2 outside more closely, guarantees that the contact surface of two parts is bigger, and the frictional force of undertaking is more even, and is better to the support effect of pier stud 2, and backplate 402 is more stable to the support of pier stud 2. The guard plate 402 is fixedly connected to the fixing portion 423, specifically, a welding manner or an integrally formed casting process may be adopted, the fixing portion 423 and the sliding portion 422 are in an insertion structure, and the insertion structure is fixedly connected through a fixing bolt 424; the sliding portion 422 is movable back and forth on the fixing portion 423, the sliding portion 422 is provided to adjust and determine a horizontal position thereof, and the sliding portion 422 and the fixing portion 423 are fixedly coupled and slid by tightening and loosening the fixing bolt 424. According to the preferable scheme, a seat body 421 which is arranged in an upward inclined manner is fixedly connected to the sliding portion 422, a third included angle D is formed between the sliding portion 422 and the seat body 421, the seat body 421 is connected with an arc-shaped body 404 which is arranged in a downward bending manner, a first included angle B is formed on the arc-shaped body 404, the first included angle B is an arc-shaped structural angle, the arc-shaped body 404 is fixedly connected with the end portion of the crab clamping portion 406, a second included angle C is formed between the crab clamping portion 406 and the crab clamp 417, the first included angle B, the second included angle C and the third included angle D form a crab clamp simulating structure, stress in mechanics is uniformly distributed, namely, a balancer function is achieved, the crab clamp reinforcing body 4 can support the bearing weight of an inclined pier, the borne weight can be reasonably transmitted to the reinforcing body 6, structural characteristics that other structures cannot form are achieved, and structural steel materials are saved. The structure of the crab clamping part 406 further comprises a movable crab claw 410 and a fixed crab claw 417 which are connected through a first rotating shaft 407, crab claw tips 412 on the movable crab claw 410 and the fixed crab claw 417 are arranged in positioning grooves 8 on the reinforcing body 6, and the positioning grooves 8 play a role of preventing the crab claw tips 412 from sliding after being positioned. The crab clamp part 406 is provided with a plurality of holes which are connected with the movable crab clamp 410 through a fixed pin 413, and the plurality of holes can be arranged horizontally, longitudinally or both, so that the position of the crab clamp part 406 and the position of the movable crab clamp 410 can be conveniently fixed; the outside of the sliding part 422 is provided with a hydraulic device 403, an oil supply pipeline and valves of various control devices (which are not described in detail in the prior art) are arranged inside the crab claw part 406, the oil supply of the hydraulic device 403 and a first valve 405 arranged on an oil discharge pipeline are used for controlling a piston rod 408 which reciprocates in an oil cylinder 419, the end of the piston rod 408 is connected with a second rotating shaft 409 shaft on the crab cutter 410, and the extending and retracting of the piston rod 408 drives the crab cutter 410 to change the angle. The movable crab pincers 410 and the fixed crab pincers 417 are of inverted V-shaped structures, a plurality of crab teeth 414 are arranged on the inner sides of the fixed crab pincers 417, the crab teeth 414 are arranged to improve strength and support force of the crab pincers 410 and the fixed crab pincers 417, and the outward arc-shaped structures of the crab teeth 414 can also play a role in stress dispersion.

The end positions in the crab claw tips 412 of the movable crab claw 410 and the fixed crab claw 417 are respectively provided with a lifting piston 415, the lifting pistons 415 are controlled by a first lifting oil cylinder 411 and a second lifting oil cylinder 416 to reciprocate respectively, the oil supply of the first lifting oil cylinder 411 and the second lifting oil cylinder 416 and the hydraulic device 403 is communicated with a hydraulic branch pipeline 418 arranged on an oil unloading pipeline, a second valve 420 arranged on the hydraulic branch pipeline 418 is used for controlling the second lifting oil cylinder 416 and the first lifting oil cylinder 411 of the crab claw tips 412 arranged on the movable crab claw 410 and the fixed crab claw 417 to lift, when the second lifting oil cylinder 416 and the first lifting oil cylinder 411 are lifted, the lifting pistons 415 extend out of the crab claw tips 412 and prop against a positioning groove 8 to play a role of a jack, and the deviation of an inclined bridge pier is corrected.

In this embodiment, in an optimal technical scheme, the first included angle B, the second included angle C, and the third included angle D are structurally combined as follows: the angle range of a third included angle D formed by the sliding part 422 and the seat body 421 is 30-40 degrees, the angle range of a first included angle B formed by the arc-shaped body 404 is 110-135 degrees, and the angle range of a second included angle C formed between the crab clamping part 406 and the crab pincers 417 is 135-155 degrees. Wherein the angle of the third included angle D is preferably 30 °, 35 ° or 40 °, the angle of the first included angle B is preferably 110 °, 115 °, 120 ° or 135 °, and the angle of the second included angle C is preferably 135 °, 140 °, 145 ° or 155 °.

Wherein a preferred composite structure is: the angle of the third included angle D is preferably 35 °, the preferred angle of the first included angle B is 115 °, and the preferred angle of the second included angle C is 145 °; wherein the other preferable combination structure is as follows: the angle of the third included angle D is preferably 35 °, the preferred angle of the first included angle B is 116 °, and the preferred angle of the second included angle C is 154 °; wherein another preferred composite structure is: the angle of third included angle D is preferably 30 °, the preferred angle of first included angle B is 110 °, and the preferred angle of second included angle C is 145 °. The combination of the structure can ensure that the crab pincer type reinforcing body 4 forms the optimal structural combination in crab pincer bionics, and also plays a role in stress balance for rectifying deviation of the pier, so that the supporting function of the crab pincer type reinforcing body 4 on the bearing weight of the inclined pier can be achieved, and the borne weight can be reasonably transmitted to the reinforcing body 6.

The invention also provides a construction process of the crab claw type deviation rectifying device arranged at the bottom of the pier, which comprises the following steps:

step 1) arranging cofferdams around piers, cleaning the cofferdams by using an excavating machine to enclose the cofferdams, exposing the lower parts of piers 2 and abutments 1 of the piers, firstly probing the outer sides of the abutments 1, pre-burying and fixing prefabricated reinforcing bodies 6 after finding a solid foundation, arranging support grooves 5 on the reinforcing bodies 6, selecting more than two reinforcing bodies 6 of an assembling structure, and fixedly assembling the more than two reinforcing bodies 6;

step 2) inserting the fixing column 401 fixedly connected to the guard plate 402 into the blind hole 201 of the pier stud 2, wherein the fixing column 401 and the blind hole 201 are in interference fit, the upper inclined angle 202 arranged at the opening of the blind hole 201 can be used for smooth insertion, and then the sliding part 422 is fixedly connected with the fixing part 423 of the guard plate 402 by screwing the fixing bolt 424;

step 3) putting the crab claw 412 on the fixed crab claw 417 into the inner side positioning groove 8, then extending or retracting the piston rod 408 on the oil cylinder 419 to a proper position by using the control device of the hydraulic device 403, and simultaneously putting the crab claw 412 on the movable crab claw 410 into the outer side positioning groove 8 to fix a corresponding angle and position, and then penetrating the fixed pin 413 into a hole arranged on the crab claw 406 to be fixedly connected, so that the movable crab claw 410 and the crab claw 406 are fixedly and firmly fixed;

step 4) opening a switch of a second valve 420, enabling a lifting piston 415 on a second lifting oil cylinder 416 and a first lifting oil cylinder 411 to extend out, correcting and correcting the position of the pier, and closing the second valve 420 after the pier is corrected to a proper position;

step 5) excavating and cleaning the inclined sides of the pier 1 and the pier pile 7 by using an excavating machine, searching inclination reasons, removing inclination factors or pouring concrete on the excavated part, wherein the concrete pouring depth is greater than or equal to the maximum width of the pier column 2, and simultaneously curing the poured concrete after the concrete pouring; according to the preferable technical scheme, the construction process comprises the following steps of performing three-layer cooling maintenance on the poured concrete in the step 5):

step 1) paving a first heat preservation layer on concrete poured on the surface, paving a first crushed ice layer with the thickness range of 10-15mm on the first heat preservation layer, wherein the particle range of the first crushed ice layer is 5-8mm, and then paving a second heat preservation layer on the crushed ice layer; the particle range of the first crushed ice layer is set to be 5-8mm, so that heat released by the poured concrete can be absorbed in time, and the phenomenon of expansion with heat and contraction with cold of the poured concrete is prevented;

spreading a second crushed ice layer with the thickness range of 15-20mm on the second heat-insulating layer in the step 2), wherein the particle range of the second crushed ice layer is 10-15mm, then laying a third heat-insulating layer on the second crushed ice layer, and setting the second crushed ice layer with the particle range of 10-15mm so as to prevent the first crushed ice layer from melting quickly and provide continuous cooling effect for the first crushed ice layer;

spreading a third crushed ice layer with the thickness range of 20-30 mm on the third heat-insulating layer in a sub-step 3), wherein the particle range of the third crushed ice layer is 15-20mm, finally wrapping a fourth heat-insulating layer on the third crushed ice layer, and setting the outermost particle range of the third crushed ice layer to be 15-20mm, wherein the selected granularity is the largest, firstly, the third crushed ice layer is used for blocking the heating influence of the outside on the poured concrete, and simultaneously, the third crushed ice layer is also used for providing continuous cooling effect for the first crushed ice layer and the second crushed ice layer, so that the heat released by the poured concrete can be absorbed in time;

first garrulous ice layer, second garrulous ice layer and third garrulous ice layer are from the bottom up's stair structure owing to thickness and the granule scope that sets up, can guarantee not take place expend with heat and contract with cold's phenomenon to the concrete of pouring, improve the precision of rectifying of pier.

And 6) after the poured concrete is completely solidified, removing the crab claw type deviation correcting device.

Example 2

As shown in fig. 5, this embodiment is further improved on the basis of embodiment 1, except that: the crab claw type deviation correcting device of setting in pier bottom that this embodiment provided, it is oval structure to add solid 6, and oval structure can adapt to more complicated external environment.

The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present invention.

Claims (9)

1. The crab claw type deviation correcting device is arranged at the bottom of a pier and is characterized by comprising a plurality of crab claw type reinforcing bodies (4) which are annularly arranged, one end of each crab claw type reinforcing body (4) is connected to the outer side of a pier stud (2), the other end of each crab claw type reinforcing body (4) is connected with a reinforcing body (6), each crab claw type reinforcing body (4) comprises a fixing column (401) which is fixedly connected with a blind hole (201) in the pier stud (2) in an inserting mode, the fixing column (401) is fixedly connected to a protection plate (402) corresponding to the outer side shape of the pier stud (2), the protection plate (402) is connected to a fixing part (423), the fixing part (423) is connected with a sliding part (422) used for adjusting the position in the horizontal direction, a seat body (421) which is obliquely arranged upwards is arranged on the sliding part (422), and the seat body (421) is connected with an arc-shaped body (404) which is bent downwards, the arc-shaped body (404) is connected with a crab clamping part (406), the crab clamping part (406) comprises a movable crab clamp (410) and a fixed crab clamp (417), a first rotating shaft (407) is arranged on the fixed crab clamp (417), the movable crab clamp (410) and the fixed crab clamp (417) are connected through the first rotating shaft (407) in a shaft mode, crab clamp tips (412) on the movable crab clamp (410) and the fixed crab clamp (417) are arranged in positioning grooves (8) on the reinforcing body (6), a plurality of holes which are transversely arranged and/or vertically arranged are arranged on the crab clamping part (406), and the holes are connected with the movable crab clamp (410) through fixing pin shafts (413); the crab claw type crab claw lifting device is characterized in that a hydraulic device (403) is arranged on the outer side of the sliding portion (422), a first valve (405) arranged on an oil supply and oil discharge pipeline of the hydraulic device (403) is used for controlling a piston rod (408) which moves back and forth in an oil cylinder (419), the end of the piston rod (408) is connected with a second rotating shaft (409) on the crab claw moving clamp (410) in a shaft mode, lifting pistons (415) are respectively arranged at the end positions in crab claw tips (412) on the crab claw moving clamp (410) and the crab claw fixing clamp (417), the lifting pistons (415) are controlled by a first lifting oil cylinder (411) and a second lifting oil cylinder (416) to move back and forth, hydraulic branch pipelines (418) are arranged on the oil supply and oil discharge pipelines of the first lifting oil cylinder (411) and the second lifting oil cylinder (416) and the hydraulic device (403), and a second valve (420) arranged on the hydraulic branch pipelines (418) is used for controlling a second lifting oil cylinder (416) arranged on the crab claw moving clamp (410) and the crab claw fixing clamp (417) to control a ) And the first lifting oil cylinder (411) performs lifting motion.

2. The crab claw type deviation rectifying device arranged at the bottom of a pier according to claim 1, wherein the movable crab claw (410) and the fixed crab claw (417) jointly form an inverted V-shaped structure, and a plurality of crab teeth (414) are arranged on the inner side of the fixed crab claw (417).

3. The crab claw type deviation rectifying device provided at the bottom of a bridge pier according to claim 1, wherein the fixing portion (423) and the sliding portion (422) are plug-in structures each other, and the plug-in structures are fixedly connected by a fixing bolt (424).

4. The crab-claw type deviation rectifying device for pier bottoms of claim 1, wherein the reinforcing body (6) has a circular or elliptical structure.

5. The crab claw type deviation correcting device provided at the bottom of a pier according to claim 1, wherein the reinforcing body (6) is provided with a supporting groove (5), and the positioning groove (8) is provided in the supporting groove (5).

6. The crab claw type deviation correcting device arranged at the bottom of a pier according to claim 1, wherein a third included angle (D) is arranged between the sliding part (422) and the base body (421), the angle range of the third included angle (D) is 30-40 degrees, the angle range of the first included angle (B) arranged on the arc-shaped body (404) is 110-135 degrees, and the angle range of the second included angle (C) arranged between the crab claw part (406) and the crab fixing claw (417) is 135-155 degrees.

7. The crab claw type deviation rectifying device provided at the bottom of a bridge pier according to claim 6, wherein the third included angle (D) has an angle of 30 °, 35 ° or 40 °, the first included angle (B) has an angle of 110 °, 115 °, 120 ° or 135 °, and the second included angle (C) has an angle of 135 °, 140 °, 145 ° or 155 °.

8. The construction process of the crab claw type deviation rectifying device arranged at the bottom of the pier according to any one of claims 1 to 7, wherein the construction process comprises the following steps:

step 1) arranging cofferdams around piers, cleaning the inside of the cofferdams by using an excavating machine, exposing the lower parts of pier studs (2) and abutments (1) of the piers, probing the outer sides of the abutments (1), pre-embedding and fixing prefabricated reinforcing bodies (6) after finding a solid foundation, arranging support grooves (5) on the reinforcing bodies (6), arranging more than two reinforcing bodies (6) of an assembly structure, and fixedly assembling the more than two reinforcing bodies (6);

step 2), inserting a fixed column (401) fixedly connected to a guard plate (402) into a blind hole (201) in the pier column (2) in an interference fit manner, smoothly inserting and fixing the fixed column by using an upper inclined angle (202) arranged at the opening of the blind hole (201), and then fixedly connecting a sliding part (422) with a fixing part (423) of the guard plate (402) by screwing a fixing bolt (424);

step 3), putting the crab claw tips (412) on the crab fixing pliers (417) into the inner side positioning grooves (8), extending or contracting the piston rods (408) on the oil cylinders (419) to a proper position by using a control device of the hydraulic device (403), putting the crab claw tips (412) on the crab moving pliers (410) into the outer side positioning grooves (8) for fixing a corresponding angle and position, and then penetrating the fixing pin shafts (413) into holes formed in the crab clamping parts (406) for fixing and connecting, so that the crab moving pliers (410) and the crab clamping parts (406) are fixed firmly;

step 4) opening a switch of a second valve (420), enabling a lifting piston (415) on a second lifting oil cylinder (416) and a first lifting oil cylinder (411) to extend out, correcting and correcting the position of the pier, and closing the second valve (420) after the pier is corrected to a proper position;

step 5) excavating and cleaning one inclined side of the pier (1) and the pier pile (7) by using an excavating machine, searching for the reason of inclination, removing inclination factors, then pouring concrete on the excavated part, wherein the concrete pouring depth is greater than or equal to the maximum width of the pier stud (2), and simultaneously curing the poured concrete after pouring the concrete;

and 6) after the poured concrete is completely solidified, removing the crab claw type deviation correcting device.

9. The construction process of the crab claw type deviation rectifying device arranged at the bottom of the pier according to claim 8, wherein the construction process is characterized in that the three-layer cooling maintenance is performed on the poured concrete in the step 5), and the three-layer cooling maintenance step comprises the following sub-steps:

step 1) paving a first heat preservation layer on concrete poured on the surface, paving a first crushed ice layer with the thickness range of 10-15mm on the first heat preservation layer, wherein the particle range of the first crushed ice layer is 5-8mm, and then paving a second heat preservation layer on the crushed ice layer;

spreading a second crushed ice layer with the thickness range of 15-20mm on the second heat-insulating layer in the step 2), wherein the particle range of the second crushed ice layer is 10-15mm, and then laying a third heat-insulating layer on the second crushed ice layer;

spreading a third crushed ice layer with the thickness range of 20-30 mm on the third heat-insulating layer in the step 3), wherein the particle range of the third crushed ice layer is 15-20mm, and finally wrapping a fourth heat-insulating layer on the third crushed ice layer.

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