Grab bucket cutter device of underground diaphragm wall trenching machine under influence of large-diameter pipeline
By installing a cutting device on the outside of the grab bucket of the trenching machine, the problem of trenching for underground continuous walls under the influence of large-diameter pipelines was solved, achieving efficient earthwork excavation and construction safety, shortening the construction period and reducing the risk of water leakage.
Patent Information
- Application Number
- CN202520450174.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Due to the influence of large-diameter pipelines, existing technologies are unable to effectively form trenches, leading to the reverse excavation of underground continuous walls, which prolongs the construction period, increases the consumption of manpower and material resources, and increases the risk of water leakage.
A cutting device is installed on the outside of the grab bucket of the trenching machine. The rotation of the grab bucket drives the cutting device to cut the soil, thereby removing the soil directly below the pipeline. Combined with the soil removal by the grab bucket, the trenching below the pipeline is successfully completed.
It improves earthwork excavation efficiency, shortens the construction period, reduces the time spent on manual excavation, ensures construction safety, and avoids the risk of water leakage.
Smart Images
Figure CN223951849U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to underground continuous wall construction technical field, specifically speaking, relate to a kind of big pipe diameter pipeline influence under underground continuous wall trencher grab cutter device. BACKGROUND
[0002] With the continuous development of society, ground rail traffic has been difficult to meet people's travel, underground rail traffic has been booming development, to relieve ground traffic pressure, in subway construction, enclosure structure commonly uses underground continuous wall+internal support.Due to the working condition limitation of subway itself, pipeline around subway station is multiple and complex, and some large pipe diameter pipeline crossing foundation pit is difficult to move, and can only be constructed in the mode of suspending over foundation pit.
[0003] Under this working condition, underground continuous wall is affected by large pipe diameter pipeline, and trenching cannot be effectively carried out directly below the pipeline, so that only underground continuous wall can be excavated inversely during deep foundation pit excavation, and the excavation of underground continuous wall inversely can waste a lot of manpower and material resources.
[0004] On the one hand, the excavation of underground continuous wall inversely prolongs the construction period of deep foundation pit, and the excavation of earthwork needs to wait until the excavation of underground continuous wall inversely, and after the strength of concrete reaches, the excavation can be carried out;On the other hand, the excavation of underground continuous wall inversely brings the danger of seepage water to deep foundation pit, and the excavation of underground continuous wall inversely is generally carried out in a cycle of 1 meter from top to bottom, so that more construction joints are caused, and seepage water of deep foundation pit is easily caused.
[0005] In order to improve the efficiency of earthwork excavation directly below the pipeline and reduce the time of manual construction in pit, the existing excavation equipment needs to be improved. UTILITY MODEL CONTENT
[0006] The utility model aims at the deficiency of prior art, and provides a kind of underground continuous wall trencher grab cutter device under the influence of large pipe diameter pipeline, which improves the efficiency of earthwork excavation directly below the pipeline, reduces the time of manual construction in pit, guarantees construction period and construction safety.
[0007] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme that a kind of underground continuous wall trencher grab cutter device under the influence of large pipe diameter pipeline, including trencher grab and cutter;
[0008] The trencher grab includes left grab, right grab and hinge part, the top end of left grab and right grab is hingedly installed on the hinge part, and the opening direction of the trencher grab is set downward;
[0009] The cutter is arranged on the outer side of one of the grabs, the outer end of the cutter exceeds the outer contour of the grab, and the cutter is rotated and cut along with the swing of the grab around the hinge part.
[0010] Preferably, the outer side of the left grab bucket and the outer side of the right grab bucket are provided with cutters.
[0011] Preferably, the cutters are in the shape of a triangle beyond the area of the grab bucket, the tip of the triangle is the farthest end, and the hypotenuse of the triangle is below the cutters.
[0012] Preferably, the cutters comprise a rake face, a relief face and a connecting rib, the rake face is fixed to the front end face of the grab bucket, the relief face is fixed to the rear end face of the grab bucket, and the connecting rib is connected between the rake face and the relief face.
[0013] Preferably, the connecting rib is distributed along the outer contour of the cutters at equal intervals to form part of an effective cutting structure.
[0014] Preferably, the rake face and the relief face comprise a plurality of steel plates welded together.
[0015] Preferably, the radius of rotation of the cutters is ≤3m with the hinge as the center.
[0016] Preferably, the rake face and the relief face are welded from at least two steel plates.
[0017] Preferably, the rake face and the relief face are fixed to the grab bucket by welding.
[0018] Preferably, when the grab bucket is closed, the cutters are in a horizontal state as a whole.
[0019] The utility model discloses relative prior art has substantial characteristics and progress, specifically speaking, the utility model discloses install cutter on the grab bucket outside traditional continuous wall trenching machine, drive cutter rotation with the opening and closing of grab bucket, in the process of cutter unfolding, owing to the effective radius of grab bucket increases, realized the agitation to the soil body directly below pipeline, then take out the loose soil body with the grab bucket of trenching machine, pipeline below successfully trenching, this device utilizes the process of pipeline both sides groove, conveniently completed the removal of soil body below pipeline, improved construction efficiency, avoided manual pit operation, accelerated the construction period, guaranteed the safety of construction. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a structure principle drawing of a grab bucket cutter device of an underground continuous wall trenching machine under the influence of a large pipe diameter pipeline in the utility model.
[0021] Figure 2 It is a mechanism schematic view of a cutter in a grab bucket cutter device of an underground continuous wall trenching machine under the influence of a large pipe diameter pipeline in the utility model.
[0022] Figure 3 It is an installation structure drawing of a grab bucket cutter device of an underground continuous wall trenching machine under the influence of a large pipe diameter pipeline in the utility model.
[0023] Figure 4 This is one of the reference example diagrams of a grab bucket cutting device for a diaphragm wall trenching machine under the influence of a large-diameter pipe in this utility model.
[0024] Figure 5 This is the second reference example diagram of a grab bucket cutting device for a diaphragm wall trenching machine under the influence of large-diameter pipes in this utility model.
[0025] In the diagram: 1. Hinge; 2. Grab; 3. Cutter; 31. Front blade; 32. Back blade; 33. Connecting rib. Detailed Implementation
[0026] The technical solution of this utility model will be further described in detail below through specific embodiments.
[0027] like Figures 1-3 As shown, a grab bucket and cutter device for a trenching machine for diaphragm walls under the influence of large-diameter pipes includes a grab bucket 2 and a cutter 3 of the trenching machine.
[0028] The troughing machine grab bucket includes a left grab bucket, a right grab bucket, and a hinge part 1. The left grab bucket and the right grab bucket are collectively referred to as grab bucket 2. The top of the grab bucket 2 is hinged to the hinge part 1, and the opening direction of the grab bucket 2 of the troughing machine is set downward.
[0029] The cutter 3 is located on the outside of one of the grabs 2, and the outer end of the cutter 3 extends beyond the outer contour of the grab. As the grab swings around the hinge, the cutter performs rotary cutting.
[0030] Specifically, in this embodiment, the complete rotation radius of the cutter 3 around the hinge 1 should be ≤3m. The cutter 3 includes a front blade surface 31, a rear blade surface 32, and a connecting rib 33. The front blade surface 31 is fixed to the front end face of the grab bucket 2, the rear blade surface 32 is fixed to the rear end face of the grab bucket 2, and the connecting rib 33 connects the front blade surface 31 and the rear blade surface 32. The connecting rib 33 is evenly distributed along the outer contour of the cutter 3 to form part of the effective cutting structure.
[0031] In terms of specific manufacturing, the front cutting face 31 and the rear cutting face 32 include several steel plates welded together. The front cutting face and the rear cutting face are formed by welding at least two steel plates. The front cutting face 31 and the rear cutting face 32 are fixed to the grab bucket 2 by welding.
[0032] Its actual installation status is as follows Figure 4 and Figure 5 As shown.
[0033] The area of the cutter 3 extending beyond the grab bucket 2 is triangular, with the apex of the triangle being the farthest point and the hypotenuse of the triangle located below the cutter.
[0034] When the grab bucket is closed, the cutter is in a horizontal state as a whole.
[0035] In other embodiments, for the convenience of adjusting the operation direction, the outer side of the left grab bucket and the outer side of the right grab bucket are both provided with cutters.
[0036] Construction process description:
[0037] (1) By using the working mechanism of the trenching machine, when the trench is dug, the grab bucket is in a closed state, and after reaching the soil layer, the grab bucket is opened according to the rotation center to take out the soil, and the maximum opening width is 3 meters.
[0038] (2) According to the position of the rotation center, the welding position is selected according to the position of the pipeline, the cutter welding position is close to the pipeline side, then the cutter is welded, to ensure that the grab bucket is still in a closed state when the trench is dug, and the cutter does not exceed the range of 3 meters. The cutter is composed of two steel plates and connecting ribs, and the steel plates are processed according to the shape of the grab bucket of the trenching machine.
[0039] (3) With the rotation of the rotation center, the cutter slowly unfolds, and according to the selection of the welding position, the maximum unfolding radius can be adjusted.
[0040] (4) During the unfolding process of the cutter, the soil directly below the pipeline is slowly stirred, and finally the soil is taken out by the grab bucket, and the pipeline directly below is successfully grooved.
[0041] This scheme reduces the construction period of the deep foundation pit, and the deep foundation pit engineering is a dangerous and large engineering, which reduces the existence time of the dangerous and large risk source. Without using special materials, the problem that the diaphragm wall cannot be grooved under the influence of large-diameter pipelines is successfully solved, the effective closure of the enclosure structure-underground continuous wall is ensured, the effect is remarkable, the deep foundation pit earthwork excavation period is shortened, and the safety of the deep foundation pit is ensured.
[0042] Finally, it should be noted that: the above has made a detailed description of the preferred embodiments of the patent, but the patent is not limited to the above-mentioned embodiments, within the knowledge range of ordinary skilled persons in the art, various changes can be made without departing from the purpose of the patent.
Claims
1. A grab bucket cutting device for a diaphragm wall trenching machine under the influence of large-diameter pipelines, characterized in that: Including the troughing machine's grab bucket and cutter; The troughing machine grab bucket includes a left grab bucket, a right grab bucket, and a hinged part. The top ends of the left grab bucket and the right grab bucket are hinged to the hinged part, and the opening direction of the troughing machine grab bucket is downward. The cutter is located on the outside of one of the grabs, with its outer end extending beyond the outer contour of the grab. As the grab swings around the hinge, the cutter performs a rotary cut.
2. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 1, characterized in that: Cutting blades are installed on the outer sides of both the left and right grab buckets.
3. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 1, characterized in that: The area of the cutter extending beyond the grab bucket is triangular, with the apex of the triangle being the farthest point and the hypotenuse of the triangle located below the cutter.
4. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 3, characterized in that: The cutter includes a front blade, a rear blade, and a connecting rib. The front blade is fixed to the front end face of the grab bucket, the rear blade is fixed to the rear end face of the grab bucket, and the connecting rib connects the front blade and the rear blade.
5. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 4, characterized in that: The connecting ribs are evenly distributed along the outer contour of the cutter, forming part of the effective cutting structure.
6. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 5, characterized in that: The front and rear cutting faces consist of several steel plates welded together.
7. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 6, characterized in that: With the hinge as the center, the rotation radius of the cutter is ≤3m.
8. The grab bucket cutting device for trenching machine for diaphragm walls under the influence of large-diameter pipelines as described in claim 7, characterized in that: The rake face and flank face are welded together from at least two steel plates.
9. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 8, characterized in that: The front and rear cutting edges are fixed to the grab bucket by welding.
10. The grab bucket cutting device for trenching machine of underground continuous wall under the influence of large-diameter pipelines as described in claim 9, characterized in that: When the grab is closed, the cutter is in a horizontal position.