CN114108631A - Vibrator for gravity grouting and gravity grouting method - Google Patents
Vibrator for gravity grouting and gravity grouting method Download PDFInfo
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- CN114108631A CN114108631A CN202111425793.8A CN202111425793A CN114108631A CN 114108631 A CN114108631 A CN 114108631A CN 202111425793 A CN202111425793 A CN 202111425793A CN 114108631 A CN114108631 A CN 114108631A
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- grouting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
- E04G21/08—Internal vibrators, e.g. needle vibrators
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- General Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a vibrator for gravity grouting, which comprises a support frame and a vibration motor, wherein the vibration motor is fixed on the support frame, a supporting part for supporting a support is convexly arranged at the bottom of one side of the support frame, a supporting leg extends downwards from the bottom of the support frame, the top of the supporting leg is connected to a telescopic mechanism, and the telescopic mechanism is arranged in the support frame. When the support is installed and grouted, the support frame can be supported to the periphery of the bottom of the support, the vibration motor is started to drive the whole support to vibrate, the vibration of the anchor bolt at the bottom of the support can assist in jolting slurry, the slurry can be ensured to be filled in the anchor bolt hole, the residue of bubbles is reduced, and the gravity grouting effect is greatly improved; after grouting is finished, the device can be taken out only by controlling the telescopic mechanism to retract the supporting leg.
Description
Technical Field
The invention relates to the field of building construction, in particular to a vibrator for gravity grouting and a gravity grouting method.
Background
The gravity grouting method is characterized in that a trapezoidal funnel-shaped template is manufactured at a grouting opening of a large unit needing secondary grouting, the slurry flows quickly by means of gravity action and depending on a high-low liquid level difference, and discharged air is filled between an equipment base and a foundation, so that a secondary grouting layer is compact. Gravity grouting is mostly used for fixing the pile foundation support.
The existing gravity grouting method comprises the steps of placing a support at a position to be installed, supporting the support to a certain height by using a base plate, erecting a template around the periphery of the support, and guiding slurry to the bottom of a support seat by using gravity until the slurry is higher than the bottom surface of the support to finish grouting. Although the grouting mode is simple, the support is directly in place to participate in grouting operation, and the slurry cannot be vibrated, so that the compactness of the slurry is lower than that of surrounding components and the support; and the air bubbles in the slurry can not be effectively discharged, especially in the anchor bolt hole where the anchor bolt is positioned at the bottom of the support, a large amount of air bubbles are easy to remain due to the fact that air can not be timely discharged in the grouting process, the firmness and the durability of the support are influenced, the capability of resisting extra-large disasters (such as earthquake, debris flow and the like) is reduced, and the slurry is not beneficial to being used in mountainous and multi-earthquake areas in China.
Therefore, a new gravity grouting method or a vibration device for gravity grouting is required to solve the above problems.
Disclosure of Invention
One object of the present invention is to provide a new technical solution for gravity grouting.
According to a first aspect of the invention, a vibrator for gravity grouting is provided, which comprises a support frame and a vibration motor, wherein the vibration motor is fixed on the support frame, a support part for supporting a support is convexly arranged at the bottom of one side of the support frame, a support leg extends downwards from the bottom of the support frame, the top of the support leg is connected to a telescopic mechanism, and the telescopic mechanism is arranged in the support frame.
According to the scheme, when the support is installed and grouted, the support frame can be supported to the periphery of the bottom of the support, the vibration motor is started to drive the whole support to vibrate, the vibration of the anchor bolt at the bottom of the support can assist in jolting slurry, the slurry can be ensured to be filled in the anchor bolt hole, the residue of bubbles is reduced, and the gravity grouting effect is greatly improved; after grouting is finished, the device can be taken out only by controlling the telescopic mechanism to retract the supporting leg.
Preferably, the telescopic mechanism comprises a telescopic cylinder and a buffer spring, the telescopic cylinder is arranged in the support frame, and the buffer spring is arranged between a piston rod of the telescopic cylinder and the support leg.
Through the scheme, the buffer spring can reduce the vibration transmitted to the supporting leg, the damage to the ground is reduced, the elastic connection can improve the vibration amplitude, and the vibration effect is improved; and the piston rod of the telescopic cylinder is not directly connected with the supporting legs, so that the transverse force applied to the supporting legs after being pressed can be prevented from being applied to the piston rod, and the telescopic cylinder is protected. .
Preferably, the bottom of the support frame is vertically provided with an adjusting cavity, the support leg is connected to the adjusting cavity in a sliding mode, and the piston rod extends downwards into the adjusting cavity.
Through this scheme, adjust the chamber and play spacing effect to the supporting leg, realize reciprocating of supporting leg and adjust.
Preferably, the outside of supporting part is provided with the constant head tank, the constant head tank is used for fixed vibrations net.
Through this scheme, when this device supported the support, fix a position in inserting the constant head tank with the vibrations net tip that reinforcement becomes, not only realized the location of reinforcing bar net piece, can also make the supplementary vibrations of reinforcing bar net piece, enlarge the area of jolt to improve the grout effect.
Preferably, a plurality of feet are fixed at the bottom of the supporting leg, and the feet at least extend to the position right below the supporting part.
According to the scheme, the support legs can improve the stability of the support legs and guarantee that the support can be stably supported; but also can increase the contact area with the bottom surface and reduce the pressure intensity.
According to a second aspect of the present invention, there is provided a gravity grouting method using the vibrator for gravity grouting, comprising the steps of:
the method comprises the following steps: hoisting the support to a position to be installed and placing a vibrator for gravity grouting to the periphery of the support;
step two: the supporting legs are controlled to extend out, so that the supporting parts are abutted to the periphery of the bottom surface of the support;
step three: extending the grouting pipe to the bottom of the support to start grouting, and starting a vibrator for gravity grouting to vibrate;
step four: after the vibration is finished, keeping the lifting position of the support stable, retracting the supporting legs and moving the supporting legs laterally to take out the vibrator for gravity grouting;
step five: grouting is continued until the specified height is reached.
Preferably, in the first step, after the vibration net is erected between the vibrators for gravity grouting, the support is lifted to the position to be installed, so that the anchor bolt at the bottom of the support penetrates through the vibration net.
Preferably, in the first to fifth steps, the lifting rope on the top of the support always applies the pulling force to the support.
Through this scheme, the lifting rope is all the time to the support application of force, avoids the gravity of support to damage support frame or supporting leg to impact to ground when can reducing vibrations.
Preferably, in step one, the gravity grouting is placed on a steel pad plate with a vibrator.
Through this scheme, further reduce the impact to ground, avoid shattering ground or the anchor bolt hole that collapses.
According to an embodiment of this disclosure, adopt this device to carry out the gravity grout, can transmit vibrations to support and crab-bolt on, utilize the crab-bolt to vibrate in the anchor bolt hole, improve the compactedness after the thick liquids are poured, reduce the reserve volume of bubble in the thick liquids, improve the fixed effect of support greatly, adapt to more complicated and abominable geological environment.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view illustrating an installation position of a vibrator for gravity grouting according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of the vibrator for gravity grouting of fig. 1.
Fig. 3 is a schematic cross-sectional view of the vibrator for gravity grouting of fig. 2.
Fig. 4 is a schematic diagram of the structure at a in fig. 1.
Fig. 5 is a top view of the vibrator of fig. 1.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
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, further discussion thereof is not required in subsequent figures.
Example one
As shown in fig. 1 to 5, the vibrator 1 for gravity grouting in the present embodiment includes a supporting frame 110 and a vibration motor 120, the vibration motor 120 is fixed to the supporting frame 110, a supporting portion 111 for supporting a support 2 is convexly disposed at the bottom of one side of the supporting frame 110, a supporting leg 130 downwardly extends from the bottom of the supporting frame 110, the top of the supporting leg 130 is connected to a telescopic mechanism, and the telescopic mechanism is disposed in the supporting frame 110.
According to the scheme of the embodiment, when the support 2 is installed and grouted, the support frame 110 can be supported to the periphery of the bottom of the support 2, the vibration motor 120 is started to drive the whole support 2 to vibrate, the vibration of the anchor bolt 21 at the bottom of the support 2 can assist in jolting slurry, the anchor bolt hole 31 can be filled with the slurry, the residue of bubbles is reduced, and the gravity grouting effect is greatly improved; after grouting, the telescopic mechanism is controlled to retract the supporting leg 130, the supporting part 111 falls off the support of the support 2, and the device can be taken out after horizontally moving the device.
In this embodiment or other embodiments, the telescopic mechanism includes a telescopic cylinder 141 and a buffer spring 142, the telescopic cylinder 141 is disposed in the supporting frame 110, and the buffer spring 142 is disposed between a piston rod of the telescopic cylinder 141 and the supporting leg 130. The buffer spring 142 can reduce the vibration transmitted to the supporting leg 130, reduce the damage to the ground, and the elastic connection can improve the vibration amplitude and improve the vibration effect;
and the piston rod of the telescopic cylinder 141 is not directly connected with the supporting leg 130, so that the transverse force or twisting force applied to the supporting leg 130 after being pressed can be prevented from being applied to the piston rod, and the telescopic cylinder 141 is protected.
The telescopic cylinder 141 may be a jack in which the extension and retraction of the piston rod is manually controlled to facilitate the control of the amount of extension and retraction, or an oil cylinder or an electric cylinder in which the extension and retraction is automatically controlled.
In this embodiment or other embodiments, the bottom of the supporting frame 110 is vertically provided with an adjusting cavity 113, the supporting leg 130 is slidably connected to the adjusting cavity 113, and the piston rod extends downward into the adjusting cavity 113. The buffer spring 142 is also arranged in the adjusting cavity 113, and the adjusting cavity 113 plays a limiting role on the supporting leg 130, so that the up-and-down movement adjustment of the supporting leg 130 is realized.
The top of the supporting leg 130 in the embodiment forms a boss towards the periphery, the inner side of the bottom of the adjusting cavity 113 is provided with a flange, and the flange is matched with the boss to limit the position of the supporting leg 130, so that the supporting leg 130 is prevented from extending out of the adjusting cavity 113. The two ends of the buffer spring 142 are respectively fixedly connected with the piston rod and the supporting leg 130, and in the process of carrying the device, the buffer spring 142 can pull the supporting leg 130 so as not to enable the boss to impact the flange.
In this embodiment or other embodiments, the outside of the supporting portion 111 is provided with a positioning groove 112, and the positioning groove 112 is used for fixing the vibrating net 23. When this device supports support 2, the vibrations net 23 that becomes with the reinforcement ligature all inserts in constant head tank 112 tip all around, make vibrations net 23 parallel with the bottom surface of support 2, fix a position vibrations net, can make the supplementary vibrations of vibrations net, enlarge the area of jolt, thereby improve the grout effect, and the interpolation of reinforcing bar net piece helps improving support 2 fixed effect, when having avoided traditional slip casting operation, because do not vibrate the drawback that the step can't add the reinforcing bar net (reinforcing bar net can block the infiltration of partial concrete, produce a large amount of holes, if do not vibrate the jolt step, then can't effectively fill up the hole, influence the intensity of concrete.
The vibration net 23 can also play a certain supporting role to assist in supporting the position of the device, and displacement and inclination of the device are reduced when the support is heavily pressed.
The vibrations net in this embodiment is the latticed structure that the reinforcement formed, and the diameter of its net is not less than the diameter of crab-bolt 21, makes crab-bolt 21 can pass the mesh of vibrations net, and the vibrations of crab-bolt 21 also can drive vibrations net 23 vibrations thereupon to reduce blockking to the thick liquids, improve the plain effect of jolt.
In this embodiment or other embodiments, several feet 131 are fixed to the bottom of the supporting leg 130, and the feet 131 at least extend to the right below the supporting part 111. The support legs 131 can improve the stability of the support legs 130, and ensure that the center of gravity can be positioned between the support legs 131, so that the support base 2 can be stably supported; but also can increase the contact area with the ground and reduce the pressure.
In order to further improve the supporting effect and avoid the influence of heavy pressure on the integrity of the anchor bolt hole 31 by penetrating the ground, a steel backing plate 32 can be laid at the bottom of the supporting leg 130 to protect the ground, and after the pouring is finished, the steel backing plate 32 is directly left below the support 2.
The gravity grouting method adopting the vibrator 1 for gravity grouting mainly comprises the following steps:
the method comprises the following steps: after the template 3 is erected, the support 2 is hoisted to a position to be installed, and a vibrator 1 for gravity grouting is placed around the support 2;
in the step, after the support 2 can be lifted to a designated position by using the lifting rope 22, the vibrator 1 for gravity grouting is placed in a space enclosed by the template 3, the support frame is close to the side surface of the support, and the support part is positioned below the support 2;
or the vibrators 1 for gravity grouting can be arranged in advance, a vibration net is erected between the vibrators for gravity grouting, the periphery of the vibration net is inserted into the positioning grooves, the vibration net is kept horizontal, and then the support is lifted to a position to be installed so that the anchor bolt at the bottom of the support penetrates through the vibration net.
In order to avoid damaging the ground or causing the collapse of the anchor bolt hole 31 during the vibration process, a vibrator for gravity grouting is placed on the steel backing plate 32 to enlarge the contact area and reduce the pressure.
Step two: the supporting legs 130 are controlled to extend out, so that the supporting parts 111 are abutted to the periphery of the bottom surface of the support 2, the supporting parts are always in a stress state, and the vibration of the supporting frame can be smoothly transmitted to the support.
Step three: extending the grouting pipe to the bottom of the support 2 to start grouting, and starting a vibrator for gravity grouting to vibrate; when the vibration motor vibrates, the vibration can be transmitted to the support to drive the support to vibrate simultaneously, and the support is used as a medium for transmitting the vibration to tamp the slurry; the vibration and grouting are carried out simultaneously, so that the gas accumulation at the bottom of the anchor bolt hole can be reduced, and the compaction effect in the anchor bolt hole is ensured; and simultaneously, the construction efficiency is improved.
Step four: after the vibration is finished, keeping the lifting position of the support stable, retracting the supporting legs and moving the supporting legs laterally to take out the vibrator for gravity grouting;
step five: grouting is continued until the specified height is reached.
In the first to fifth steps, the lifting rope 22 at the top of the support always applies a pulling force to the support 2, the lifting rope 22 always applies a force to the support 2, the support frame 110 or the support leg 130 is prevented from being damaged by the gravity of the support 2, and the impact on the ground in the vibration process can be reduced. When the slurry is completely solidified, the fixing of the support is completed after the lifting rope 22 is removed.
According to this embodiment, adopt this device to carry out the gravity grout, can transmit vibrations to support and crab-bolt on, utilize the crab-bolt to vibrate in the anchor bolt hole, improve the compactedness after the thick liquids are poured, reduce the reserve volume of bubble in the thick liquids, improve the fixed effect of support greatly, adapt to more complicated and abominable geological environment.
Example two
The gravity grouting method using the vibrator for gravity grouting in the embodiment mainly comprises the following steps:
the method comprises the following steps: hoisting the support 2 to a position to be installed and placing a vibrator 1 for gravity grouting to the periphery of the support 2;
step two: the supporting legs 130 are controlled to extend out, so that the supporting parts 111 are abutted to the periphery of the bottom surface of the support 2, the supporting parts are always in a stress state, and the vibration of the supporting frame can be smoothly transmitted to the support.
Step three: extending the grouting pipe to the bottom of the support 2 to start grouting, stopping grouting when grouting reaches the bottom surface of the support 2, and starting a vibrator for gravity grouting to vibrate;
step four: after the vibration is finished, keeping the lifting position of the support stable, retracting the supporting legs and moving the supporting legs laterally to take out the vibrator for gravity grouting;
step five: grouting is continued until the specified height is reached.
In the first to fifth steps, the lifting rope 22 at the top of the support always applies a pulling force to the support 2, the lifting rope 22 always applies a force to the support 2, the support frame 110 or the support leg 130 is prevented from being damaged by the gravity of the support 2, and the impact on the ground in the vibration process can be reduced. When the slurry is completely solidified, the fixing of the support is completed after the lifting rope 22 is removed.
Grouting operation and vibrations operation separately go on in this step, can reduce splashing of thick liquids, can reserve out the bubble that enough space supplied in the thick liquids moreover and spill over, avoid the support bottom surface to go out the gathering air, influence the plain effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. The utility model provides a vibrator for gravity is in milk, includes support frame (110) and shock dynamo (120), shock dynamo (120) are fixed to on support frame (110), its characterized in that, the one side bottom protrusion of support frame (110) is provided with supporting part (111) that are used for supporting the support, the bottom of support frame (110) has stretched out downwards supporting leg (130), supporting leg (130) top is connected to telescopic machanism, telescopic machanism set up in support frame (110).
2. The vibrator according to claim 1, wherein the telescopic mechanism comprises a telescopic cylinder (141) and a buffer spring (142), the telescopic cylinder (141) is disposed in the supporting frame (110), and the buffer spring (142) is disposed between a piston rod of the telescopic cylinder (141) and the supporting leg (130).
3. The vibrator for gravity grouting according to claim 2, wherein an adjusting cavity (113) is vertically arranged at the bottom of the supporting frame (110), the supporting leg (130) is slidably connected into the adjusting cavity (113), and the piston rod downwardly extends into the adjusting cavity (113).
4. The vibrator for gravity grouting according to claim 1, wherein a positioning groove (112) is provided at an outer side of the support part (111), and the positioning groove (112) is used for fixing the vibrating mesh (23).
5. The vibrator for gravity grouting according to claim 1, wherein a plurality of feet (131) are fixed to the bottom of the support leg (130), and the feet (131) at least extend to the right below the support part (111).
6. A gravity grouting method using the vibrator for gravity grouting of any one of claims 1 to 5, comprising the steps of:
the method comprises the following steps: hoisting the support to a position to be installed and placing a vibrator for gravity grouting to the periphery of the support;
step two: the supporting legs are controlled to extend out, so that the supporting parts are abutted to the periphery of the bottom surface of the support;
step three: extending the grouting pipe to the bottom of the support to start grouting, and starting a vibrator for gravity grouting to vibrate;
step four: after the vibration is finished, keeping the lifting position of the support stable, retracting the supporting legs and moving the supporting legs laterally to take out the vibrator for gravity grouting;
step five: grouting is continued until the specified height is reached.
7. The gravity grouting method according to claim 6, wherein in the first step, after the vibration net is erected between the vibrators for gravity grouting, the support is lifted to the position to be installed so that the anchor bolt at the bottom of the support passes through the vibration net.
8. A gravity grouting method according to claim 6, characterised in that in steps one to five, the lifting rope on top of the support always exerts a pulling force on the support.
9. The gravity grouting method according to claim 6, wherein in the first step, the gravity grouting is performed on a steel backing plate by a vibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425793.8A CN114108631B (en) | 2021-11-26 | 2021-11-26 | Vibrator for gravity grouting and gravity grouting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111425793.8A CN114108631B (en) | 2021-11-26 | 2021-11-26 | Vibrator for gravity grouting and gravity grouting method |
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| CN114108631A true CN114108631A (en) | 2022-03-01 |
| CN114108631B CN114108631B (en) | 2023-08-29 |
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| CN101545246A (en) * | 2009-05-05 | 2009-09-30 | 中国铁道科学研究院铁道建筑研究所 | Method for constructing support grouting material in winter |
| CN106926346A (en) * | 2017-04-14 | 2017-07-07 | 青岛科而泰环境控制技术有限公司 | Low noise acoustic excitation bearing |
| CN206509484U (en) * | 2017-02-06 | 2017-09-22 | 浙江杭机铸造有限公司 | A kind of casting and molding jolting device |
| CN208102068U (en) * | 2018-04-19 | 2018-11-16 | 江西水利职业学院(江西省水利水电学校、江西省灌溉排水发展中心、江西省水利工程技师学院） | A kind of hydraulic engineering pile foundation construction handling device |
| CN208455497U (en) * | 2018-06-30 | 2019-02-01 | 中铁二十局集团第一工程有限公司 | The built-in tamping equipment of bridge rotating flexural pivot envelope hinge construction |
| JP2019098723A (en) * | 2017-12-08 | 2019-06-24 | 株式会社竹中工務店 | Air release device for grout |
| CN209636650U (en) * | 2019-03-08 | 2019-11-15 | 中铁十二局集团第二工程有限公司 | Support grouting device |
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2021
- 2021-11-26 CN CN202111425793.8A patent/CN114108631B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101545246A (en) * | 2009-05-05 | 2009-09-30 | 中国铁道科学研究院铁道建筑研究所 | Method for constructing support grouting material in winter |
| CN206509484U (en) * | 2017-02-06 | 2017-09-22 | 浙江杭机铸造有限公司 | A kind of casting and molding jolting device |
| CN106926346A (en) * | 2017-04-14 | 2017-07-07 | 青岛科而泰环境控制技术有限公司 | Low noise acoustic excitation bearing |
| JP2019098723A (en) * | 2017-12-08 | 2019-06-24 | 株式会社竹中工務店 | Air release device for grout |
| CN208102068U (en) * | 2018-04-19 | 2018-11-16 | 江西水利职业学院(江西省水利水电学校、江西省灌溉排水发展中心、江西省水利工程技师学院） | A kind of hydraulic engineering pile foundation construction handling device |
| CN208455497U (en) * | 2018-06-30 | 2019-02-01 | 中铁二十局集团第一工程有限公司 | The built-in tamping equipment of bridge rotating flexural pivot envelope hinge construction |
| CN209636650U (en) * | 2019-03-08 | 2019-11-15 | 中铁十二局集团第二工程有限公司 | Support grouting device |
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| Publication number | Publication date |
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| CN114108631B (en) | 2023-08-29 |
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