CN114809093A - Manhole cover positioning and mounting device and mounting construction method - Google Patents

Manhole cover positioning and mounting device and mounting construction method Download PDF

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Publication number
CN114809093A
CN114809093A CN202210548910.8A CN202210548910A CN114809093A CN 114809093 A CN114809093 A CN 114809093A CN 202210548910 A CN202210548910 A CN 202210548910A CN 114809093 A CN114809093 A CN 114809093A
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well
frame
manhole cover
installation
chuck
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CN114809093B (en
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李杨
韩芳晓
张学
丁毕雨
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Second Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
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Second Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • 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
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/18—Adjusting tools; Templates
    • E04G21/1841—Means for positioning building parts or elements

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

本发明涉及市政井道系统施工的技术领域，尤其是涉及一种检查井盖定位安装装置及安装施工方法。本发明定位安装装置包括卡盘和支撑架，所述卡盘通过升降架活动安装在支撑架上，所述卡盘上活动安装有卡爪，所述支撑架上活动安装有激光发射器。本发明施工步骤为，在预定检查井安装位置进行基坑开挖，在基坑内安装井体，在浇注成型的井体顶部安装井框，回填井体外侧周围基坑，在井框顶部安装井盖，将井体周围整体压平。本发明利用激光发射器进行标高，调节方便，同时不受施工空间限制，昏暗情况下也能够清晰进行施工标高，受环境影响小，卡盘加持所需安装构件，通过机械进行调节，提高安装精度，方便工人操作。

Figure 202210548910

The invention relates to the technical field of municipal well system construction, in particular to an inspection manhole cover positioning and installation device and an installation and construction method. The positioning and installation device of the present invention includes a chuck and a support frame, the chuck is movably installed on the support frame through the lifting frame, the chuck is movably installed with a claw, and the support frame is movably installed with a laser transmitter. The construction steps of the invention are as follows: excavating the foundation pit at the predetermined inspection well installation position, installing the well body in the foundation pit, installing the well frame on the top of the poured well body, backfilling the foundation pit around the outside of the well body, and installing the well cover on the top of the well frame , flatten the whole around the well body. The invention uses the laser transmitter to carry out the elevation, which is convenient to adjust, and is not limited by the construction space. The construction elevation can be clearly carried out even in dark conditions, and is less affected by the environment. The chuck supports the required installation components, and can be adjusted by machinery to improve the installation accuracy. , which is convenient for workers to operate.

Figure 202210548910

Description

Manhole cover positioning and mounting device and mounting construction method
Technical Field
The invention relates to the technical field of municipal shaft system construction, in particular to a manhole cover positioning and mounting device and a mounting and construction method.
Background
At present, the construction quality of road reason is influenced to a great extent by the construction precision of urban road manhole covers, and the reason is that the construction precision of manhole covers can influence the road flatness, and then influence driving comfort and manhole cover service life.
Inspection well lid is installed before the pitch surface course on the town road usually, need use the spirit level to measure well lid surrounding surface elevation during the installation, and constructor fixes a position installation inspection well lid according to the measuring result hanging wire, and every inspection well lid need measure a plurality of points, hangs the construction line and confirms well lid elevation.
Rely on the hanging wire elevation on the one hand elevation precision low, on the other hand for the elevation stay wire receive the construction space influence, keep away from the construction position and can't carry out accurate elevation easily, be close to the construction position and receive the construction again easily and influence and arouse the disturbance or trip to, owing to be act as go-between, both sides all need be adjusted during consequently altitude mixture control, need adjust height and levelness simultaneously, the precision interference is great, is difficult for the construction.
Disclosure of Invention
The invention provides a manhole cover positioning and mounting device and a mounting construction method, aiming at improving the mounting precision of a manhole cover and reducing the difficulty of precision control in the mounting process.
On one hand, the manhole cover positioning and mounting device provided by the invention adopts the following technical scheme:
the utility model provides an inspection well lid location installation device, includes chuck and support frame, the chuck passes through crane movable mounting on the support frame, movable mounting has the jack catch on the chuck, movable mounting has laser emitter on the support frame.
Through adopting above-mentioned technical scheme, utilize laser emitter to carry out the elevation, it is convenient to adjust, does not receive the construction space restriction simultaneously, also can clearly carry out the elevation of being under the dim condition, receives environmental impact little, and the chuck adds holds required installation component, adjusts through machinery, improves the installation accuracy, makes things convenient for workman's operation.
Preferably, the support frame comprises four vertical support legs, and the laser transmitters are respectively installed on the vertical support legs on the same side of the support frame.
Through adopting above-mentioned technical scheme, mated laser emitter not only can carry out the elevation, also can cross mark mounted position's center, improves installation horizontal direction precision, and can mark two different part mounting heights alone, avoids the appearance of adjustment error.
Preferably, the jaws are mounted in runners in the chuck, the runners radiating around the center of the chuck.
Through adopting above-mentioned technical scheme, the jack catch can inwards snatch also can outside joint, can adapt to the component of ring and cake dress simultaneously and snatch, also can take different modes of snatching to the component of equidimension not and the component of different mounting means.
Preferably, chuck center department movable mounting has the double-screw bolt, the jack catch passes through push rod and double-screw bolt swing joint, push rod one end is articulated with the jack catch, and the other end and double-screw bolt threaded connection, the double-screw bolt top is provided with the rotation handle.
Through adopting above-mentioned technical scheme, through the elasticity of adjusting the jack catch to the screw column rotation, convenient operation rotates the handle convenience and adjusts the double-screw bolt.
Preferably, the lifting frame is provided with a telescopic rod, the movable end of the telescopic rod is fixedly connected with the chuck, the lifting frame is provided with a fixed hook, and the fixed hook is movably hung on a horizontal fixed rod of the support frame.
Through adopting above-mentioned technical scheme, the telescopic link is adjusted through outside power device, improves control degree and control accuracy, and multistage fixed couple can provide multiple altitude mixture control, and fixed couple can move on the support frame simultaneously, is suitable for multiple operating mode environment and workspace's the condition.
Preferably, the bottom of the support frame is provided with a movable wheel, the movable wheel is provided with a locking hole, and the support frame is provided with a locking block at a position close to the movable wheel.
Through adopting above-mentioned technical scheme, remove wheel locking hole and can carry out the locking with removing the wheel, prevent that the device from removing in the installation, influencing the construction.
On the other hand, the invention provides a manhole cover positioning, mounting and constructing method, which adopts the following technical scheme:
a construction method for positioning, installing and constructing a manhole cover comprises the following construction steps:
the method comprises the following steps: excavating a foundation pit at a preset inspection well installation position, then cleaning broken stones at the bottom of the foundation pit and carrying out leveling treatment on the edge of the foundation pit;
step two: installing a well body in the foundation pit, wherein the well body is of a reinforced concrete structure and is formed by casting on a construction site by utilizing a template;
step three: installing a well frame at the top of a well body formed by casting, hoisting the well frame to the position right above an installation position by using a manhole cover positioning and installing device during installation, and horizontally positioning and lowering the well frame by using laser to be installed to be flush with a road surface;
step four: backfilling foundation pits around the outer side of the well body after the well frame is installed and fixed, and continuously monitoring the height of the well frame in the backfilling process;
step five: and after the foundation pit is backfilled, mounting a well cover at the top of the well frame, and flattening the whole periphery of the well body.
Through adopting above-mentioned technical scheme, adopt laser assistance-localization real-time in the well body and the well lid installation, positioning accuracy is high and the location receives the interference little, and the arrangement installation relies on the device to accomplish, reduces the recruitment cost.
Preferably, in the third step, a combined construction mode of suspension and pad lifting is adopted during the installation of the well frame, the height of the well frame is firstly adjusted by using the manhole cover positioning and installing device, and then the well frame is leveled by using the pad lifting.
By adopting the technical scheme, the use of the positioning tool for adjusting the elevation of the well frame enables the suspension method and the pad lifting method to be combined, the advantages of the two methods are complementary, the speed is increased, and the positioning accuracy is also improved.
Preferably, in the step four, when backfilling, the well body and the outer circumference of the well frame are filled and fixed by using concrete, then the backfilling road base materials are filled around the well body and the outer circumference of the well frame, and asphalt is paved on the top of the backfilling road base materials.
Through adopting above-mentioned technical scheme, utilize the concrete to fill fixedly to well body and well frame outside a week and be favorable to fixing well body and well frame installation, prevent to backfill in-process and lead to well body and well frame skew, cause the phenomenon of doing over again.
Preferably, the installation height of the well lid in the fifth step is 1-3mm higher than the road surface.
Through adopting above-mentioned technical scheme, the well lid is owing to often the pressurized, consequently can slump, makes reasonable height in advance, reserves the space that collapses, improves life.
In summary, the invention has the following beneficial technical effects:
1. utilize laser emitter to carry out the elevation, it is convenient to adjust, does not receive the construction space restriction simultaneously, also can clearly carry out the elevation of being under the dim condition, receives environmental impact little, and the chuck adds holds required installation component, adjusts through machinery, improves the installation accuracy, makes things convenient for the workman to operate.
2. Paired laser transmitters can not only be used for elevation, but also can be used for marking the center of the installation position in a crossed manner, so that the accuracy of the installation and installation in the horizontal direction is improved, the installation heights of two different parts can be marked independently, and the occurrence of adjustment errors is avoided.
3. The jack catch can inwards snatch also can outside joint, can adapt to the component of ring and cake dress simultaneously and snatch, also can take the different modes of snatching to the component of equidimension not and the component of different mounting means.
4. The use of the positioning tool for adjusting the elevation of the well frame enables the suspension method and the pad lifting method to be combined, the advantages of the two methods are complementary, the speed is increased, and the positioning accuracy is also improved.
Drawings
FIG. 1 is a schematic view of a positioning and mounting device according to the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 from another view angle;
FIG. 3 is a schematic view of a chuck according to the present invention;
FIG. 4 is a schematic view of the moving wheel structure of the present invention.
Description of reference numerals:
1. chuck, 10, spout, 11, jack catch, 12, push rod, 13, double-screw bolt, 14, rotation handle, 2, crane, 21, telescopic link, 22, fixed couple, 3, support frame, 31, horizontal fixing pole, 32, removal wheel, 321, locking piece, 322, locking hole, 4, laser emitter.
Detailed Description
The invention is described in further detail below with reference to figures 1-4.
Example 1:
the embodiment of the invention discloses a manhole cover positioning and mounting device, and with reference to fig. 1 and 2, the manhole cover positioning and mounting device comprises a chuck 1 and a support frame 3, wherein the chuck 1 is movably mounted on the support frame 3 through a lifting frame 2, a clamping jaw 11 is movably mounted on the chuck 1, and a laser transmitter 4 is movably mounted on the support frame 3.
The embodiment of example 1 is:
snatch the installation component and mention through jack catch 11 on the regulation chuck 1, control support frame 3 moves to preset position, and control chuck 1 is transferred the installation component to reasonable position, wherein need adjust laser emitter 4 in advance and carry out the elevation in the installation.
Example 2:
on the basis of example 1, the following are added:
referring to fig. 1, 2 and 4, the supporting frame (3) comprises four vertical legs, and the laser transmitters (4) are respectively arranged on the vertical legs at the same side of the supporting frame (3)
Referring to fig. 1, 2 and 3, the jaws 11 are mounted in runners 10 of the chuck 1, the runners 10 being radially disposed about the center of the chuck 1.
Referring to fig. 1, 2 and 3, a stud 13 is movably mounted at the center of the chuck 1, the jaw 11 is movably connected with the stud 13 through a push rod 12, one end of the push rod 12 is hinged with the jaw 11, the other end of the push rod is in threaded connection with the stud 13, and a rotating handle 14 is arranged at the top of the stud 13.
Referring to fig. 1 and 2, the lifting frame 2 is provided with a telescopic rod 21, the movable end of the telescopic rod 21 is fixedly connected with the chuck 1, the lifting frame 2 is provided with a fixed hook 22, and the fixed hook 22 is movably hung on a horizontal fixed rod 31 of the support frame 3.
The telescopic rod 21 is a pneumatic rod or a hydraulic rod.
Referring to fig. 4, a moving wheel 32 is disposed at the bottom of the supporting frame 3, a locking hole 322 is formed on the moving wheel 32, and a locking block 321 is disposed at a position of the supporting frame 3 close to the moving wheel 32.
The moving wheel 32 is an airplane wheel.
When the locking block 321 is inserted into the locking hole 322, the same-side moving wheel 32 is splayed.
The embodiment of example 2 is:
the following are added on the basis of the embodiment of the example 1:
utilize manual control to rotate handle 14 during regulation jack catch 11 and rotate double-screw bolt 13 and adjust, through outside power device, the accurate mounting height who adjusts telescopic link 21 and control installation component, horizontal fixing rod 31 can be dismantled, dismantle horizontal fixing rod 31 and adjust fixed couple 22 then installation when needing to adjust fixed couple 22, control through knocking fixed couple 22 during horizontal adjustment chuck 1 and crane 2 position.
Example 3:
the embodiment of the invention discloses a construction method for positioning, installing and constructing a manhole cover, which comprises the following construction steps:
the method comprises the following steps: excavating a foundation pit at a preset inspection well installation position, then cleaning broken stones at the bottom of the foundation pit and carrying out leveling treatment on the edge of the foundation pit;
step two: installing a well body in the foundation pit, wherein the well body is of a reinforced concrete structure and is formed by casting on a construction site by utilizing a template;
step three: installing a well frame at the top of a well body formed by casting, hoisting the well frame to the position right above an installation position by using a manhole cover positioning and installing device during installation, and horizontally positioning and lowering the well frame by using laser to be installed to be flush with a road surface;
step four: backfilling foundation pits around the outer side of the well body after the well frame is installed and fixed, and continuously monitoring the height of the well frame in the backfilling process;
step five: and after the foundation pit is backfilled, mounting a well cover at the top of the well frame, and flattening the whole periphery of the well body.
And step three, adopting a combined construction mode of suspension and pad lifting during the installation of the well frame, firstly utilizing the manhole cover positioning and installing device to adjust the height, and then utilizing the pad lifting to level the well frame.
And fourthly, during backfilling, firstly filling and fixing the well body and the outer side of the well frame by using concrete, then backfilling a road base material around the well body and the outer side of the well frame, and paving asphalt on the top of the well body and the outer side of the well frame.
Fifthly, the installation height of the well cover is 1-3mm higher than the road surface.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1.一种检查井盖定位安装装置，其特征在于：包括卡盘（1）和支撑架（3），所述卡盘（1）通过升降架（2）活动安装在支撑架（3）上；1. An inspection manhole cover positioning and installation device, characterized in that it comprises a chuck (1) and a support frame (3), and the chuck (1) is movably installed on the support frame (3) through a lift frame (2); 所述卡盘（1）上活动安装有卡爪（11）；A jaw (11) is movably installed on the chuck (1); 所述支撑架（3）上活动安装有激光发射器（4）。A laser transmitter (4) is movably installed on the support frame (3). 2.根据权利要求1所述的一种检查井盖定位安装装置，其特征在于：所述支撑架（3）包括四个竖向支腿，在所述支撑架（3）同侧的竖向支腿上各安装一个所述激光发射器（4）。2. An inspection manhole cover positioning and installation device according to claim 1, characterized in that: the support frame (3) comprises four vertical legs, and the vertical supports on the same side of the support frame (3) One of the laser transmitters (4) is mounted on each leg. 3.根据权利要求1所述的一种检查井盖定位安装装置，其特征在于：所述卡爪（11）安装在卡盘（1）的滑槽（10）内，所述滑槽（10）围绕卡盘（1）中心呈辐射状设置。3. An inspection manhole cover positioning and installation device according to claim 1, characterized in that: the jaws (11) are installed in the chute (10) of the chuck (1), and the chute (10) Arranged radially around the center of the chuck (1). 4.根据权利要求3所述的一种检查井盖定位安装装置，其特征在于：所述卡盘（1）中心处活动安装有螺柱（13），所述卡爪（11）通过推杆（12）与螺柱（13）活动连接，所述推杆（12）一端与卡爪（11）铰接，另一端与螺柱（13）螺纹连接，所述螺柱（13）顶部设置有转动把手（14）。4. An inspection manhole cover positioning and installation device according to claim 3, characterized in that: a stud (13) is movably installed at the center of the chuck (1), and the claw (11) passes through a push rod ( 12) Actively connected with the stud (13), one end of the push rod (12) is hinged with the claw (11), and the other end is threadedly connected with the stud (13), and the top of the stud (13) is provided with a rotating handle (14). 5.根据权利要求1所述的一种检查井盖定位安装装置，其特征在于：所述升降架（2）上设置有伸缩杆（21），所述伸缩杆（21）的活动端与卡盘（1）固定连接，所述升降架（2）上设置有固定挂钩（22），所述固定挂钩（22）活动挂在支撑架（3）的水平固定杆（31）上。5 . An inspection manhole cover positioning and installation device according to claim 1 , wherein a telescopic rod ( 21 ) is arranged on the lifting frame ( 2 ), and the movable end of the telescopic rod ( 21 ) is connected to the chuck. 6 . (1) Fixed connection, the lifting frame (2) is provided with a fixing hook (22), and the fixing hook (22) is movably hung on the horizontal fixing rod (31) of the support frame (3). 6.根据权利要求1所述的一种检查井盖定位安装装置，其特征在于：所述支撑架（3）底部设置有移动轮（32），所述移动轮（32）上开有锁止孔（322），所述支撑架（3）靠近移动轮（32）处设置有锁止块（321）。6 . An inspection manhole cover positioning and installation device according to claim 1 , wherein a moving wheel ( 32 ) is arranged at the bottom of the support frame ( 3 ), and a locking hole is opened on the moving wheel ( 32 ). 7 . (322), a locking block (321) is provided on the support frame (3) close to the moving wheel (32). 7.一种检查井盖定位安装施工方法，其特征在于：包括以下施工步骤：7. An inspection manhole cover positioning and installation construction method is characterized in that: comprising the following construction steps: 步骤一：在预定检查井安装位置进行基坑开挖，然后清理基坑底部碎石并对基坑岸沿进行平整处理；Step 1: Excavate the foundation pit at the predetermined inspection well installation location, then clean up the gravel at the bottom of the foundation pit and level the edge of the foundation pit; 步骤二：在基坑内安装井体，所述井体为钢筋混凝土结构，并利用模板在施工现场浇筑成型；Step 2: install a well body in the foundation pit, the well body is a reinforced concrete structure, and is cast and formed at the construction site by using a template; 步骤三：在浇注成型的井体顶部安装井框，安装时先将井框悬利用检查井盖定位安装装置吊至安装位置正上方，并通过激光水平定位下放安装至与路面平齐；Step 3: Install the well frame on the top of the poured well body. When installing, first hang the well frame suspension to the right above the installation position with the inspection manhole cover positioning and installation device, and then lower it to the level with the road surface by laser horizontal positioning; 步骤四：等待井框安装固定后回填井体外侧周围基坑，回填过程中持续监测井框高度；Step 4: After the well frame is installed and fixed, backfill the foundation pit around the outside of the well body, and continuously monitor the height of the well frame during the backfilling process; 步骤五：基坑回填完成后，在井框顶部安装井盖，将井体周围整体压平。Step 5: After the backfill of the foundation pit is completed, install the manhole cover on the top of the well frame, and flatten the surrounding of the well body as a whole. 8.根据权利要求7所述的一种检查井盖定位安装施工方法，其特征在于：步骤三所述井框安装时采用悬吊与起垫联合施工方式，先利用检查井盖定位安装装置进行高度调节，然后在利用起垫对井框进行调平。8. A construction method for the positioning and installation of an inspection manhole cover according to claim 7, characterized in that: in the step 3, when the manhole frame is installed, a combined construction method of suspension and cushioning is adopted, and height adjustment is first performed by using a positioning and installation device for the inspection manhole cover , and then use the pad to level the well frame. 9.根据权利要求7所述的一种检查井盖定位安装施工方法，其特征在于：步骤四所述回填时先利用混凝土对井体和井框外侧一周进行填充固定，然后在周围进行回填路基料并在顶部铺设沥青。9 . The construction method for positioning, installing and installing an inspection manhole cover according to claim 7 , characterized in that: during backfilling in step 4, concrete is used to fill and fix the outer side of the well body and the well frame, and then backfill road base material around And lay asphalt on top. 10.根据权利要求7所述的一种检查井盖定位安装施工方法，其特征在于：步骤五所述井盖安装高度高于路面1-3mm。10 . The construction method for positioning, installing, and installing an inspection manhole cover according to claim 7 , wherein the installation height of the manhole cover in step 5 is 1-3 mm higher than that of the road surface. 11 .
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115305961A (en) * 2022-09-19 2022-11-08 聊城市市政工程管理服务中心 Municipal works are with road surface construction equipment that has regulatory function
CN115959607A (en) * 2022-12-30 2023-04-14 中国一冶集团有限公司 Well cover installation device and using method thereof

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CN109629605A (en) * 2019-01-16 2019-04-16 中交公局海威工程建设有限公司 Road inspection well well lid construction equipment and construction technology
CN111535364A (en) * 2020-05-09 2020-08-14 宁夏第三建筑有限公司 Multifunctional well circle elevation control frame
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CN213475357U (en) * 2020-10-28 2021-06-18 济宁市恒德建设有限公司 Municipal works construction is mentioned device with well lid
CN113247840A (en) * 2021-05-12 2021-08-13 巨锐山 Inspection shaft lid maintenance of equipment for town road construction
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CN215442037U (en) * 2021-08-28 2022-01-07 姚茜 Well lid structure for municipal administration
CN114348928A (en) * 2021-12-03 2022-04-15 国网山东省电力公司郓城县供电公司 Electric power well lid replacing device
CN216512740U (en) * 2021-12-24 2022-05-13 中建八局第二建设有限公司 Well lid installation device

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CN115305961A (en) * 2022-09-19 2022-11-08 聊城市市政工程管理服务中心 Municipal works are with road surface construction equipment that has regulatory function
CN115305961B (en) * 2022-09-19 2023-08-11 聊城市市政工程管理服务中心 Municipal works are with road surface construction device that has regulatory function
CN115959607A (en) * 2022-12-30 2023-04-14 中国一冶集团有限公司 Well cover installation device and using method thereof

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