CN111140258B - Culvert lining trolley and lining method - Google Patents
Culvert lining trolley and lining method Download PDFInfo
- Publication number
- CN111140258B CN111140258B CN202010031756.8A CN202010031756A CN111140258B CN 111140258 B CN111140258 B CN 111140258B CN 202010031756 A CN202010031756 A CN 202010031756A CN 111140258 B CN111140258 B CN 111140258B
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- 238000000034 method Methods 0.000 title claims description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 230000009194 climbing Effects 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000009415 formwork Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Sewage (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a culvert lining trolley which comprises a trolley set, a returning top frame, a jacking mechanism, wheels and supporting cylinders, wherein the trolley set comprises two side die frames and a span-reducing frame, the two side die frames are sequentially and transversely arranged, the span-reducing frame is arranged between the two side die frames, and the returning top frame is arranged at the rear part of the middle frame; the top parts of the side die frame and the span-reducing frame are respectively provided with a top die plate, and the bottom parts of the side die frame and the span-reducing frame are respectively connected with wheels through a jacking mechanism; the side die frame is far away from one side of the span-reducing frame and is provided with a corner template and a side template, a top template, a corner template and a side template of the side die frame are sequentially hinged, a plurality of supporting cylinders are arranged between the corner template, the side template and the side die frame, one ends of the supporting cylinders are respectively hinged with the side die frame, and the other ends of the supporting cylinders are respectively hinged with the corner template and the side template. According to the culvert lining trolley, the return roof frame is used for supporting instead of the trolley set, the trolley set is demoulded and moved to the next station for lining the culvert, and the construction efficiency is high.
Description
Technical Field
The invention belongs to the technical field of lining devices, and particularly relates to a culvert lining trolley and a lining method.
Background
When the inner wall of the culvert is lined with concrete, the two lining trolleys can be demolded until the concrete strength reaches a certain degree, for example, if the span of the culvert is L, demolding is permitted only when the concrete strength reaches 75% when the L is more than 2 meters and less than 8 meters, demolding is permitted only when the concrete strength reaches 100% when the L is more than 8 meters and less than 11-12 days. The reference day is 28 days and therefore it is necessary to stay the trolley at the lining for a period of time, which greatly limits the construction efficiency of the two-lining trolley.
Disclosure of Invention
Based on the above problems, the invention aims to provide a culvert lining trolley.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a culvert lining trolley, includes trolley set, back roof frame, climbing mechanism, wheel, supporting cylinder, trolley set include two side form frames of horizontal range in proper order and set up the frame of subtracting to stride between two side form frames, back roof frame is arranged in the rear portion of well frame; the top parts of the side die frame and the span-reducing frame are respectively provided with a top die plate, and the bottom parts of the side die frame and the span-reducing frame are respectively connected with wheels through a jacking mechanism; the side die frame is far away from one side of the span-reducing frame and is provided with a corner template and a side template, a top template, a corner template and a side template of the side die frame are sequentially hinged, a plurality of supporting cylinders are arranged between the corner template, the side template and the side die frame, one ends of the supporting cylinders are respectively hinged with the side die frame, and the other ends of the supporting cylinders are respectively hinged with the corner template and the side template.
The invention discloses a method for lining by utilizing the culvert lining trolley, which comprises the following steps:
Step 1: driving the trolley into the position of the culvert to be lined, and adjusting the jacking mechanism and the supporting cylinder to enable the top template, the corner template and the side template to be at the set position;
Step 2: pouring concrete on the top and the side parts of the trolley, and after the concrete strength reaches a certain degree, contracting the supporting cylinder to drive the corner templates and the side templates to release the membranes, contracting the jacking mechanism of the span-reducing frame to drive the top templates of the span-reducing frame to release the membranes, wherein the top templates of the side mold frames are kept in a supporting state;
step 3, the span-reducing frame is pushed forward to the next station, the back roof frame follows from the back, and the jacking mechanism of the back roof frame jacks up the back roof frame so that the top of the back roof frame supports the concrete lining the inner wall of the culvert;
step 4, the jacking mechanism of the side die frame contracts and moves forward to the two sides of the span-reducing frame to form a trolley group of the next station;
and 5, repeating the operations of the steps 1 to 4 to perform concrete lining on the inner wall of the culvert.
The culvert lining trolley further comprises upper longitudinal beams and translation oil cylinders, wherein the upper longitudinal beams and the translation oil cylinders are arranged between the side formwork frame or the span reduction frame and the top formwork, the tops of the two upper longitudinal beams which are transversely arranged are fixedly connected with the top formwork respectively, the bottoms of the two upper longitudinal beams are respectively connected with the side formwork frame or the span reduction frame in a sliding mode, the translation oil cylinders are transversely and horizontally arranged between the two upper longitudinal beams, a cylinder body of each translation oil cylinder is hinged with the side formwork frame or the span reduction frame, a piston rod is connected with the upper longitudinal beam which is far away from the span reduction frame on the side formwork frame or any upper longitudinal beam on the span reduction frame, and the translation oil cylinders drive the top formwork to horizontally move.
Specifically, the side form frame and the span reduction frame comprise the following structures: the support legs, the back timber, the intermediate beam, wherein, two rows of landing legs parallel arrangement, the top of two rows of landing legs respectively links firmly at the both ends of back timber, and the both ends of intermediate beam link firmly with the middle part of two rows of landing legs respectively, the landing leg at the front and back both ends of two rows of landing legs is connected with the wheel through climbing mechanism respectively.
Specifically, the supporting cylinder comprises an upper supporting cylinder and a lower supporting cylinder, wherein one end of the upper supporting cylinder is hinged with the side die frame, and the other end of the upper supporting cylinder is hinged with the hinged part of the corner die plate and the top die plate; one end of the lower supporting cylinder is hinged with the side die frame, and the other end is hinged with the side die plate
Specifically, the one side that corner template, side form are close to the side form frame sets up the tie-beam, set up the screw jack between tie-beam and the side form frame, the both ends of screw jack are articulated with tie-beam, side form frame respectively, when with corner template, side form roof to settlement department, carry out stable support through the screw jack to it, avoid corner template, side form demoulding under the pressure of concrete, when needing the drawing of patterns, the screw jack can be dismantled.
Specifically, still include the controller, the controller is connected with climbing mechanism, wheel, supporting cylinder communication, through the movement of controller control platform truck and the flexible of template.
Specifically, the lower part of side form frame sets up the balancing weight, guarantees the stability of platform truck.
Specifically, the front end and the rear end of the side die frame and the span-reducing frame are respectively provided with an escalator, and the escalator is convenient for operators to operate.
Preferably, the trolley set comprises two side mould frames and more than two span reducing frames arranged between the two side mould frames in sequence in a transverse arrangement mode, the number of the span reducing frames is selected according to the span of the culvert, and particularly when the span of the culvert is larger than 8 meters, two or more span reducing frames are arranged in the middle to reduce the concrete span, and the side mould frames on the two sides are released and pushed forward in a shorter time.
Specifically, climbing mechanism includes hydro-cylinder and screw jack, wherein, set up in the hydro-cylinder of bench set and set up in the screw jack of returning the roof-rack, side form frame, the bottom of subtracting striding the frame are connected with the wheel through the hydro-cylinder respectively, the bottom of returning the roof-rack is connected with the wheel through screw jack.
Optimally, a supporting block is arranged between the side die frame and the span-reducing frame.
The beneficial effects of the invention are as follows:
According to the culvert lining trolley and the lining method, two side form frames and the span-reducing trolley frame arranged between the two side form frames are used for forming the trolley set, and in the lining process, the top frame is returned to tightly jack the incompletely solidified concrete, so that the side form frames and the span-reducing frames are released to line a culvert at the next station.
Drawings
FIG. 1 is a schematic illustration of a culvert lining trolley provided by the invention;
FIGS. 2 to 4 are views of a demolding process of a culvert lining trolley;
wherein, 1 is the side form frame, 2 is the frame that subtracts strides, 3 is the back roof frame, 4 is the cope match-plate pattern, 5 is the turning template, 6 is the side form, 7 is the supporting cylinder, 8 is climbing mechanism, 9 is the upper longitudinal beam, 10 is the translation hydro-cylinder, 11 is the coupling beam, 12 is the lead screw jack, 13 is the balancing weight, 14 is the wheel.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1, the embodiment provides a culvert lining trolley, which comprises a trolley set, a returning top frame 3, a jacking mechanism 8, wheels 14, supporting cylinders 7, an upper longitudinal beam 9 and a translation cylinder 10, and a controller, wherein the trolley set comprises two side die frames 1 and a span-reducing frame 2 arranged between the two side die frames 1 in sequence and transversely arranged, and the returning top frame 3 is arranged at the rear part of the middle frame; the top of the side die frame 1 and the top of the span-reducing frame 2 are respectively provided with a top die plate 4, and the bottom of the side die frame is respectively connected with wheels 14 through a jacking mechanism 8; the side die frame 1 is provided with a corner die plate 5 and a side die plate 6 at one side far away from the span reduction frame 2, a top die plate 4, the corner die plate 5 and the side die plate 6 of the side die frame 1 are sequentially hinged, a plurality of supporting cylinders 7 are arranged between the corner die plate 5, the side die plate 6 and the side die frame 1, one ends of the supporting cylinders 7 are respectively hinged with the side die frame 1, and the other ends of the supporting cylinders are respectively hinged with the corner die plate 5 and the side die plate 6; the upper longitudinal beams 9 and the translation cylinder 10 are arranged between the side die frame 1 or the span-reducing frame 2 and the top template 4, the tops of the two transversely arranged upper longitudinal beams 9 are respectively fixedly connected with the top template 4, the bottoms of the two transversely arranged upper longitudinal beams are respectively in sliding connection with the side die frame 1 or the span-reducing frame 2, the translation cylinder 10 is transversely and horizontally arranged between the two upper longitudinal beams 9, the cylinder body of the translation cylinder 10 is hinged with the side die frame 1 or the span-reducing frame 2, a piston rod is connected with an upper longitudinal beam 9 which is far away from the span-reducing frame 2 on the side die frame 1 or any upper longitudinal beam 9 on the span-reducing frame 2, and the front ends and the rear ends of the side die frame 1 and the span-reducing frame 2 are respectively provided with an escalator; in this embodiment, a controller adopts a PLC (programmable logic controller), wheels 14 are driven by a traveling motor, and the controller is in communication connection with the jacking mechanism 8, the traveling motor, and the supporting cylinder 7.
Wherein, side form frame 1, subtract and stride frame 2 include following structure: the support legs, the top beam and the middle beam are arranged in parallel, the two ends of the top beam are respectively fixedly connected with the tops of the two rows of support legs, the two ends of the middle beam are respectively fixedly connected with the middle parts of the two rows of support legs, the support legs at the front end and the rear end of the two rows of support legs are respectively connected with the wheels 14 through the jacking mechanism 8, and the lower parts between the two rows of support legs are provided with the balancing weights 13;
The support cylinder 7 comprises an upper support cylinder 7 and a lower support cylinder 7, wherein one end of the upper support cylinder 7 is hinged with the side die frame 1, and the other end of the upper support cylinder is hinged with the hinge position of the corner die plate 5 and the top die plate 4; one end of the lower supporting cylinder 7 is hinged with the side die frame 1, and the other end is hinged with the side die plate 6
Wherein, the corner template 5, the side form 6 are close to one side of the side form frame 1 and set up the tie beam 11, set up the screw jack 12 between tie beam 11 and the side form frame 1, both ends of the screw jack 12 are articulated with tie beam 11, side form frame 1 respectively.
In this embodiment, the jacking mechanism 8 includes an oil cylinder and a screw jack, wherein the oil cylinder arranged on the trolley set and the screw jack arranged on the back top frame 3 are respectively connected with the wheels 14 through the oil cylinder at the bottom of the side mold frame 1 and the span-reducing frame 2, and the bottom of the back top frame 3 is connected with the wheels 14 through the screw jack.
When the culvert lining trolley provided by the embodiment is used, as shown in fig. 2 to 4, concrete is poured on the top and the side parts of the trolley, after the concrete strength reaches a certain solidification degree, the screw jack 12 is disassembled, the supporting cylinder 7 contracts to drive the corner templates 5 and the side templates 6 to be taken off the membrane, the oil cylinder of the span-reducing frame 2 contracts to drive the top template 4 of the span-reducing frame 2 to be taken off the membrane, and at the moment, the top template 4 of the side model frame 1 is kept in a supporting state; then the span-reducing frame 2 is pushed forward to the next station, the back top frame 3 is followed from the back, a screw jack of the back top frame 3 jacks up the back top frame 3 so that the top on the back top frame 3 supports the concrete lining the inner wall of the culvert, an oil cylinder of the side mould frame 1 contracts and walks forward to the two sides of the span-reducing frame 2 to form a trolley group of the next station, the oil cylinder stretches to push the top mould plate 4, the corner mould plate 5 and the side mould plate 6 to the set position, a screw jack 12 is arranged, and the operation is repeated to quickly conduct concrete lining on the inner wall of the culvert.
According to the culvert lining trolley and the lining method, the roof returning frame can replace the trolley set to support without waiting for the concrete to be completely solidified, and the trolley set is demoulded and moved to the next station to conduct culvert lining, so that the construction efficiency is high.
The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. Not all embodiments are exhaustive. Obvious changes and modifications which are extended by the technical proposal of the invention are still within the protection scope of the invention.
Claims (9)
1. The method for lining by using the culvert lining trolley is characterized by comprising a trolley set, a returning top frame, a jacking mechanism, wheels and a supporting cylinder, wherein the trolley set comprises two side die frames and a span-reducing frame arranged between the two side die frames in sequence and transversely arranged, and the returning top frame is arranged at the rear part of the middle frame; the top parts of the side die frame and the span-reducing frame are respectively provided with a top die plate, and the bottom parts of the side die frame and the span-reducing frame are respectively connected with wheels through a jacking mechanism; the side die frame is far away from the side die frame, a corner template and a side template are arranged on one side of the side die frame, a top template, the corner template and the side template of the side die frame are sequentially hinged, a plurality of supporting cylinders are arranged between the corner template, the side template and the side die frame, one ends of the supporting cylinders are respectively hinged with the side die frame, and the other ends of the supporting cylinders are respectively hinged with the corner template and the side template;
The method comprises the following steps:
Step 1: driving the trolley into the position of the culvert to be lined, and adjusting the jacking mechanism and the supporting cylinder to enable the top template, the corner template and the side template to be at the set position;
Step 2: pouring concrete on the top and the side parts of the trolley, and after the concrete strength reaches a certain degree, contracting the supporting cylinder to drive the corner templates and the side templates to release the membranes, contracting the jacking mechanism of the span-reducing frame to drive the top templates of the span-reducing frame to release the membranes, wherein the top templates of the side mold frames are kept in a supporting state;
step 3, the span-reducing frame is pushed forward to the next station, the back roof frame follows from the back, and the jacking mechanism of the back roof frame jacks up the back roof frame so that the top of the back roof frame supports the concrete lining the inner wall of the culvert;
step 4, the jacking mechanism of the side die frame contracts and moves forward to the two sides of the span-reducing frame to form a trolley group of the next station;
and 5, repeating the operations of the steps 1 to 4 to perform concrete lining on the inner wall of the culvert.
2. The method for lining by using the culvert lining trolley according to claim 1, further comprising an upper longitudinal beam arranged between the side mold frame or the span-reducing frame and the top template, and a translation cylinder, wherein the tops of the two transversely arranged upper longitudinal beams are respectively fixedly connected with the top template, the bottoms of the two transversely arranged upper longitudinal beams are respectively in sliding connection with the side mold frame or the span-reducing frame, the translation cylinder is transversely and horizontally arranged between the two upper longitudinal beams, a cylinder body of the translation cylinder is hinged with the side mold frame or the span-reducing frame, and a piston rod is connected with any upper longitudinal beam on the side mold frame, which is far away from the span-reducing frame, or the span-reducing frame.
3. The method of lining with a culvert lining trolley of claim 1 wherein the sideform frame, straddle-reducing frame comprises the following structure: the support legs, the back timber, the intermediate beam, wherein, two rows of landing legs parallel arrangement, the top of two rows of landing legs respectively links firmly at the both ends of back timber, and the both ends of intermediate beam link firmly with the middle part of two rows of landing legs respectively, the landing leg at the front and back both ends of two rows of landing legs is connected with the wheel through climbing mechanism respectively.
4. The method of lining with a culvert lining trolley of claim 1 wherein the support cylinders comprise an upper support cylinder and a lower support cylinder, wherein one end of the upper support cylinder is hinged with a sideform frame and the other end is hinged with a hinge of a corner form and a top form; one end of the lower supporting cylinder is hinged with the side die frame, and the other end of the lower supporting cylinder is hinged with the side die plate.
5. The method for lining by using the culvert lining trolley according to claim 1, wherein a connecting beam is arranged on one side of the corner template and the side template, which is close to the side template frame, a screw jack is arranged between the connecting beam and the side template frame, and two ends of the screw jack are hinged with the connecting beam and the side template frame respectively.
6. The method of lining a culvert with a culvert lining trolley of claim 1 further comprising a controller in communication with the jacking mechanism, wheels, support cylinders.
7. The method of lining a culvert with a culvert lining trolley of claim 1 wherein a counterweight is provided at a lower portion of the sideform frame.
8. The method of lining with a culvert lining trolley of claim 1 wherein the trolley group includes two sideform carriages arranged laterally in sequence and two or more straddle-reducing carriages disposed between the two sideform carriages.
9. The method of lining with culvert lining trolley of claim 1, wherein the jacking mechanism comprises an oil cylinder and a screw jack, wherein the oil cylinder arranged on the trolley set and the screw jack arranged on the back-up frame are respectively connected with wheels through the oil cylinder, the bottoms of the side mold frame and the span-reducing frame are respectively connected with the wheels through the screw jack, and the bottoms of the back-up frame are connected with the wheels through the screw jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031756.8A CN111140258B (en) | 2020-01-13 | 2020-01-13 | Culvert lining trolley and lining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031756.8A CN111140258B (en) | 2020-01-13 | 2020-01-13 | Culvert lining trolley and lining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111140258A CN111140258A (en) | 2020-05-12 |
| CN111140258B true CN111140258B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010031756.8A Active CN111140258B (en) | 2020-01-13 | 2020-01-13 | Culvert lining trolley and lining method |
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| Country | Link |
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| CN (1) | CN111140258B (en) |
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| CN104564104A (en) * | 2014-12-17 | 2015-04-29 | 张进军 | Trolley system used for tunnel lining |
| CN204402504U (en) * | 2014-12-17 | 2015-06-17 | 张进军 | A kind of tunnel steel form lining trolley |
| CN107119715A (en) * | 2017-04-28 | 2017-09-01 | 东北大学 | A kind of overall mould bases of pipe gallery and its application method |
| KR101814726B1 (en) * | 2017-08-03 | 2018-01-30 | 최해순 | Size changeable type movable steel form for cable tunnel structure |
| CN207194910U (en) * | 2017-08-01 | 2018-04-06 | 中工国际工程股份有限公司 | A kind of tunnel lining chassis |
| CN109139056A (en) * | 2018-10-29 | 2019-01-04 | 中国水利电力对外有限公司 | The telescoping steel form of tunnel side wall concrete lining cutting |
| CN212003206U (en) * | 2020-01-13 | 2020-11-24 | 成都锐龙机械制造有限公司 | Culvert lining cutting platform truck |
-
2020
- 2020-01-13 CN CN202010031756.8A patent/CN111140258B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296971A (en) * | 2011-08-08 | 2011-12-28 | 湖南五新重型装备有限公司 | Lining method for tunnel emergency turnout strips and tunnel-lining trolley |
| CN203476349U (en) * | 2013-08-05 | 2014-03-12 | 中铁十二局集团第二工程有限公司 | One-time forming lining trolley for tunnel ventilation inclined shaft |
| CN204098927U (en) * | 2014-01-21 | 2015-01-14 | 中铁五局（集团）有限公司 | Cast anchor hole or switch hole independence lining trolley in tunnel |
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| CN204402504U (en) * | 2014-12-17 | 2015-06-17 | 张进军 | A kind of tunnel steel form lining trolley |
| CN107119715A (en) * | 2017-04-28 | 2017-09-01 | 东北大学 | A kind of overall mould bases of pipe gallery and its application method |
| CN207194910U (en) * | 2017-08-01 | 2018-04-06 | 中工国际工程股份有限公司 | A kind of tunnel lining chassis |
| KR101814726B1 (en) * | 2017-08-03 | 2018-01-30 | 최해순 | Size changeable type movable steel form for cable tunnel structure |
| CN109139056A (en) * | 2018-10-29 | 2019-01-04 | 中国水利电力对外有限公司 | The telescoping steel form of tunnel side wall concrete lining cutting |
| CN212003206U (en) * | 2020-01-13 | 2020-11-24 | 成都锐龙机械制造有限公司 | Culvert lining cutting platform truck |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111140258A (en) | 2020-05-12 |
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