CN115354709B - Under-buried pipeline grooving construction method and under-buried pipeline continuous wall construction method - Google Patents
Under-buried pipeline grooving construction method and under-buried pipeline continuous wall construction method Download PDFInfo
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- CN115354709B CN115354709B CN202211107699.2A CN202211107699A CN115354709B CN 115354709 B CN115354709 B CN 115354709B CN 202211107699 A CN202211107699 A CN 202211107699A CN 115354709 B CN115354709 B CN 115354709B
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 239000002689 soil Substances 0.000 claims abstract description 52
- 238000013461 design Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 230
- 239000010959 steel Substances 0.000 claims description 230
- 230000002787 reinforcement Effects 0.000 claims description 210
- 238000000034 method Methods 0.000 claims description 40
- 238000007790 scraping Methods 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009432 framing Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/025—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with scraper-buckets, dippers or shovels
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Earth Drilling (AREA)
Abstract
The utility model discloses a buried pipeline becomes groove construction method and buried pipeline continuous wall construction method under, wherein, buried pipeline becomes groove construction method under includes: soil bodies at two sides of the pipeline influence area are excavated in two orders according to a conventional grooving mode, grooved areas are respectively formed at two sides of the pipeline influence area, and the grooving depth is greater than the design depth by 1m; a side digging scraper mechanism is arranged on a grab bucket of the grooving machine, the grab bucket with the side digging scraper mechanism is opened after being lowered to a designed height position from a grooved area, and then the grooving machine is translated to the designed side digging position and then is continuously lifted and pulled to scrape the side soil column of the soil column below the pipeline; after the soil body side soil column below the pipeline is scraped by the side digging, the grooving machine is opened to the other side of the pipeline influence area, the grab bucket with the side digging scraper mechanism is opened after being lowered to the designed height position from the grooved area, and then the grooving machine is translated to the designed side digging position and then is continuously lifted to be pulled into the grab bucket of the grooving machine to scrape the residual soil column below the pipeline.
Description
Technical Field
The disclosure relates to the field of embedded pipeline grooving construction, in particular to an embedded pipeline under-grooving construction method and an embedded pipeline under-continuous wall construction method.
Background
Along with the continuous development of urban modern construction, more and more projects are developed in underground space development such as subway stations, underground space commercial bodies, underground overpasses and the like, wherein the underground continuous wall is widely applied to a deep and large foundation pit building envelope due to high rigidity, good water stopping effect and small disturbance. Meanwhile, with the gradual deepening of the development limit of the underground space in each city, the construction operation conditions are more severe, and particularly the pipeline has a great influence.
At present, the conventional construction method for the ground wall affected by the pipeline is to wait for the construction after the pipeline is changed, so that the problems of construction period lag, mechanical secondary approach and shutdown are frequently caused. Therefore, how to complete the construction of the enclosure structure under the condition of in-situ protection of the pipeline is a technical problem to be solved.
At present, the problem of locating a reinforcement cage under a pipeline is solved by adopting a one-groove two-cage technology aiming at the underground diaphragm wall of the pipeline affected area in the related technology, but the one-groove two-cage technology is more applicable when the underground diaphragm wall is constructed by a small-diameter shallow buried pipeline, but a proper solution still does not exist for the problem of lifting the underground diaphragm wall in the affected area of the deep buried large-diameter pipeline.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to solve the problem of soil excavation directly under a pipeline by providing a novel under-buried pipeline grooving side scraping knife mechanism with high structural strength and grooving mode under the condition of in-situ protection of the buried pipeline, and finally realize the construction of a ground wall under the condition of in-situ protection of the pipeline.
The invention also aims to realize in-situ construction of the underground diaphragm wall under the condition of not changing the construction pipeline by matching with the separate hoisting construction technology of the reinforcement cage, and can solve the influence of the pipeline on the enclosure structure from the technical aspect.
The invention also aims to divide the underground diaphragm wall into four areas for processing and hoisting by utilizing the flexible joint principle of the underground diaphragm wall, and solve the problem of hoisting the underground diaphragm wall in place in the area affected by the deep buried large-diameter pipeline.
In order to achieve at least one of the above objects, the present disclosure adopts the following technical scheme:
a buried pipeline lower trenching side cutting scraper mechanism comprising:
the scraper box body is provided with opposite connecting ends and bearing ends; the connecting end of the scraper box body is used for being detachably and fixedly arranged on one side of a grab bucket of the grooving machine;
bucket teeth fixedly arranged at the bearing end of the scraper box body; the bucket teeth are arranged along the length direction perpendicular to the scraper box body; the bucket teeth adopt bucket teeth of a grooving machine.
Preferably, the doctor blade case includes three or more case steel plates arranged in parallel in a width direction thereof, and a transverse rib vertically connecting the plurality of case steel plates; one end of the box steel plate is provided with a plurality of bolt holes to form the connecting end, and the other end of the box steel plate is vertically connected with an end plate; and the bucket teeth are fixedly connected to the end plate.
Preferably, the end plate is fixedly welded with a plurality of connecting blocks; the connecting blocks are connected with the bucket teeth in a one-to-one correspondence manner; the connecting block is provided with a welding surface which is jointed and welded with the end plate, and a protruding part which protrudes outwards from one side of the back-to-back welding surface; the bucket teeth are fixedly welded to the protruding portions.
Preferably, a spacing part is corresponding to the space between two adjacent box steel plates; the number of the bucket teeth is equal to that of the spacing parts, and each bucket tooth is arranged on the front side of each spacing part in a one-to-one correspondence mode.
A channeling machine, comprising: the grab bucket and the submerged pipeline lower grooving side scraping mechanism are detachably and fixedly arranged on one side of the grab bucket, and the submerged pipeline lower grooving side scraping mechanism adopts the submerged pipeline lower grooving side scraping mechanism according to any one of claims 1 to 4.
Preferably, the width of the scraper box body is equal to the width of the grab bucket of the grooving machine.
Preferably, at least one of the box steel plates is provided with an anti-falling hole;
one side of the grab bucket is also provided with an anti-falling hanging piece on the upper side of the scraper mechanism; the anti-falling hanging piece is connected with the anti-falling hole through an anti-falling steel wire rope or is hinged with an anti-falling connecting plate.
Preferably, in the opened state of the grab bucket, the side digging scraper mechanism is in a horizontal transverse state; the length of the scraper box body is not less than half of the influence width of the buried pipeline.
Preferably, the end part of each box steel plate is provided with a plurality of bolt holes which are arranged up and down; one side of the grab bucket is fixedly connected with a scraper mounting piece; the scraper mounting piece comprises a plurality of pairs of connecting lug plates which are arranged along the width direction and are in one-to-one correspondence with the steel plates of the box body; each pair of connecting lug plates are arranged up and down and are fixedly connected with the corresponding box steel plates through bolts.
Preferably, the steel plate with the thickness of 20mm or more is adopted for the box body steel plate, the scraper mounting piece and the anti-falling hanging piece.
A buried pipeline lower grooving construction method comprises the following steps:
soil bodies at two sides of the pipeline influence area are excavated in two orders according to a conventional grooving mode, grooved areas are respectively formed at two sides of the pipeline influence area, and the grooving depth is greater than the design depth by 1m;
a side digging scraper mechanism is arranged on a grab bucket of the grooving machine, the grab bucket with the side digging scraper mechanism is opened (the grab bucket is vertically moved) after being lowered to a designed height position from a grooved area, and then the grooving machine is horizontally moved to a designed side digging position (the grooving machine is horizontally moved to horizontally move the grab bucket), and then the grab bucket of the grooving machine is continuously lifted to scrape the side soil column of the soil column below the pipeline;
after the soil column on one side of the soil body below the pipeline is scraped by the side digging, opening the groove forming machine to the other side of the pipeline influence area, opening the grab bucket with the side digging scraper mechanism from the grooved area to the designed height position, translating the groove forming machine to the designed side digging position, and continuously lifting the grab bucket of the groove forming machine to scrape the residual soil column of the soil column below the pipeline;
after the soft soil part is excavated, a rotary drilling rig is adopted to drill the rock-entering part, and a rotary drilling rig is adopted to drill the rock-entering part in a cross-slot inclined drilling mode for hole repairing (slot repairing) on the lower slot section of the pipeline.
Preferably, the method further comprises the step of, after digging the soil above the pipeline: and excavating soil above the pipeline by adopting a conventional method, and then constructing guide walls and pipeline protection measures.
Preferably, constructing the guide wall by adopting a sectional reverse construction method until the guide wall is designed to have a bottom elevation; the guide wall design bottom elevation is 0.5m below the pipeline bottom elevation.
Preferably, the guide wall is constructed according to the following steps:
constructing a first section of guide wall, digging grooves together with the ultra-deep guide wall section and the common section, constructing a ground connecting wall guide wall of a pipeline influence area together with the guide walls of the adjacent groove sections to form a whole, and pouring a transverse support inside;
constructing a second section of guide wall, and after the first section of guide wall reaches the design strength and the support between the guide walls is confirmed to be effective, starting the construction of the second section of guide wall, constructing the guide wall to the top surface of the sewage pipe, and pouring a transverse support in the guide wall after the construction is finished;
and constructing a third section of guide wall, and starting the construction of the third section of guide wall after the strength of the second section of guide wall reaches the design strength and the effective support is confirmed, wherein the construction reaches the design bottom elevation of the guide wall, and the sewage pipe protection angle steel is required to be pre-buried into the guide wall during the construction of the third section of guide wall.
Preferably, the method further comprises the steps of: and detecting the grooving quality of the groove section by adopting an ultrasonic wall measuring instrument.
Preferably, the scraped soil body is fished out from the tank bottom by adopting grab buckets at intervals in the process of side digging and soil scraping.
Preferably, the side digging scraper mechanism is detachably and fixedly arranged on one side of the grab bucket; the side digging scraper mechanism comprises:
the scraper box body is provided with opposite connecting ends and bearing ends; the connecting end of the scraper box body is used for being detachably and fixedly arranged on one side of a grab bucket of the grooving machine;
bucket teeth fixedly arranged at the bearing end of the scraper box body; the bucket teeth are arranged along the length direction perpendicular to the scraper box body; the bucket teeth adopt bucket teeth of a grooving machine.
Preferably, the doctor blade case includes three or more case steel plates arranged in parallel in a width direction thereof, and a transverse rib vertically connecting the plurality of case steel plates; one end of the box steel plate is provided with a plurality of bolt holes to form the connecting end, and the other end of the box steel plate is vertically connected with an end plate; the bucket teeth are fixedly connected to the end plate;
the end plate is fixedly welded with a plurality of connecting blocks; the connecting blocks are connected with the bucket teeth in a one-to-one correspondence manner; the connecting block is provided with a welding surface which is jointed and welded with the end plate, and a protruding part which protrudes outwards from one side of the back-to-back welding surface; the bucket teeth are fixedly welded to the protruding portions.
A construction method of a buried pipeline continuous wall comprises the following steps:
the under-buried pipeline grooving construction method according to any one of the above, wherein after the construction of guide walls and pipeline protection measures is completed, 3 steel wire ropes are reserved at the positions of the pipeline protection measures to serve as in-place steel wire ropes of the under-pipeline reinforcement cage, namely 1 steel wire rope at the bottom of the under-pipeline reinforcement cage and 2 steel wire ropes at the top of the under-pipeline reinforcement cage; the reserved steel wire rope is fixed on the top surface of the guide wall, and plain soil is adopted to backfill the guide wall after the fixation is completed;
after the grooving construction is completed, the reinforcement cage is hoisted in a split mode, and the reinforcement cage is hoisted in sequence: a lower reinforcement cage of the pipeline, an upper reinforcement cage of the pipeline and reinforcement cages on two sides of the pipeline;
after the reinforcement cage is lifted, sand bags are filled at two sides of the reinforcement cage or after lock catch pipes are arranged, the reinforcement cages at two sides are moved towards the middle (slightly).
Preferably, the reinforcement cage split is hoisted according to the following steps:
lifting and straightening a lower reinforcement cage (2) of the pipeline by adopting a double machine, and then moving the lower reinforcement cage (2) of the pipeline to an excavated groove section by a main crane, wherein the lower reinforcement cage (2) of the pipeline enters the groove from the side edge of the pipeline; and connecting a steel wire rope (8) at the bottom of the lower steel reinforcement cage (2) of the pipeline with the bottom of the steel reinforcement cage (2) after the bottom of the lower steel reinforcement cage (2) of the pipeline reaches the slotted hole.
After the connection of the steel wire ropes (8) at the bottom of the steel reinforcement cage under the pipeline is completed, continuing to lower the steel reinforcement cage (2), and when the cage top of the steel reinforcement cage (2) under the pipeline is lifted to the notch position of the ground wall, adopting a shoulder pole to fix the steel reinforcement cage for replacing the steel wire ropes; releasing a lifting rope at one side of the steel reinforcement cage (2) close to the pipeline, installing a lower steel reinforcement cage top rope changing (9) of the pipeline, and taking the rope changing (9) as the lifting rope after the lower steel reinforcement cage (9) of the pipeline moves to a designed position;
after the installation of the replacement rope (9) at the top of the steel reinforcement cage under the pipeline is completed, continuing to lower the steel reinforcement cage (2) under the pipeline, wherein only the lifting rope (10) far away from one side of the pipeline is stressed in the lowering process, and the replacement rope (9) at the top of the steel reinforcement cage under the pipeline cannot be stressed so as to prevent the hidden pipeline from being stressed due to the replacement of the rope;
the method comprises the steps that after a lower steel reinforcement cage (2) of a pipeline touches the bottom, a lower steel reinforcement cage lifting rope (10) of the pipeline is not stressed, a crane is adopted to slightly lift the steel reinforcement cage lifting rope (10), meanwhile, a steel wire rope (8) at the bottom of the lower steel reinforcement cage of the pipeline is lifted by auxiliary lifting, the lower steel reinforcement cage (2) of the pipeline is horizontally dragged, and dragging is stopped after the lifting rope (10) is aligned with a reserved design mark on a guide wall;
after the lower steel reinforcement cage (2) of the pipeline is dragged into place, directly losing the steel wire rope (8) at the bottom of the lower steel reinforcement cage of the pipeline to the bottom of the tank for discarding, lifting the lower steel reinforcement cage (2) of the pipeline together with the replacement rope (9) at the top of the tank, and after the steel reinforcement cage lifting rope (10) and the replacement rope (9) are aligned with the reserved design marks on the guide wall, re-lowering the steel reinforcement cage (2) to the bottom of the tank, and fixing the replacement rope (9) at the top of the lower steel reinforcement cage of the pipeline and the lower steel reinforcement cage lifting rope (10) of the pipeline to the notch guide wall;
lifting an upper steel reinforcement cage (3) of a pipeline, translating the upper steel reinforcement cage to the pipeline to affect the notch of the underground diaphragm wall and lowering the lower steel reinforcement cage, and connecting a plurality of guide steel wire ropes (11) reserved in the upper steel reinforcement cage (3) of the pipeline with a lower steel reinforcement cage lifting rope (10) of the lower steel reinforcement cage (2) of the pipeline and a top replacement rope (9) of the lower steel reinforcement cage of the pipeline by adopting lifting rings (12) when the bottom of the upper steel reinforcement cage (3) of the pipeline reaches the notch;
after the connection of the steel wire rope (11) with the lower steel reinforcement cage lifting rope (10) and the cage top replacement rope (9) is completed, the lower steel reinforcement cage (2) is continuously lowered, and the steel wire rope (11) is reserved in the lifting cage in the process to enable the lower steel reinforcement cage lifting rope (10) to pass out of the upper steel reinforcement cage (3); when the steel reinforcement cage (3) on the pipeline is hoisted to the designed position, fixing the steel reinforcement cage (3) on the pipeline to the top surface of the guide wall by adopting the shoulder pole, and then releasing the lifting rope (13) of the steel reinforcement cage (3) on the pipeline;
after the steel reinforcement cage (3) on the pipeline is in place, installing a steel reinforcement cage lifting rope (10) and a cage top replacement rope (9) on the pipeline to the main crane for re-lifting in place; after the lower reinforcement cage (2) of the pipeline is lifted to the designed elevation, a rope clamp is adopted to fix the lifting rope (10) of the lower reinforcement cage of the pipeline on a pre-installed carrying pole;
and (5) respectively hoisting the reinforcement cages at the two sides of the lowering pipeline by adopting a conventional hoisting mode.
According to the buried pipeline lower grooving side scraping knife mechanism provided by the embodiment of the disclosure, through fixing the bucket teeth of the plurality of grooving machines at one end of the scraping knife box body and matching with the grab bucket of the grooving machine, the buried pipeline lower grooving construction can be efficiently carried out, the problem of soil excavation under the pipeline is solved, and the construction of the ground wall under the condition of pipeline in-situ protection is finally realized.
The method for constructing the buried pipeline in the lower groove can be matched with the steel reinforcement cage split hoisting construction technology to realize in-situ construction of the underground diaphragm wall under the condition of not changing the construction pipeline, and can solve the influence of the pipeline on the enclosure structure from the technical aspect. The method for constructing the buried pipeline in the lower groove can effectively eliminate the influence of the pipeline on the construction of the underground diaphragm wall, and avoid the loss of mechanical cost and labor cost caused by the periodical shutdown of the underground diaphragm wall due to difficult pipeline transition or transition delay.
The buried pipeline continuous wall construction method provided by the embodiment of the disclosure can divide the underground continuous wall into four areas for processing and hoisting by utilizing the flexible joint principle of the underground continuous wall, and can effectively solve the problem of hoisting the underground continuous wall in place in the area affected by the buried large-diameter pipeline.
The construction method of the buried pipeline continuous wall can eliminate the influence of the pipeline on the construction of the underground continuous wall, avoid the mechanical cost and labor cost loss caused by the periodical shutdown of the underground continuous wall due to difficult transition or delay of transition of the pipeline, and in order to avoid the problem that the continuity of the upper and lower reinforcement cages of the pipeline is damaged after the technology is adopted, the force is transmitted by adopting a concrete ring beam or a steel purlin to support the upper and lower adjacent parts of the pipeline in the construction method of the buried pipeline continuous wall.
Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a block diagram of a submerged pipeline lower trenching side cutting blade mechanism according to one embodiment of the present disclosure;
FIG. 2 is a schematic view of a groover grapple attachment;
FIG. 3 is a schematic view of the side-cutting doctor mechanism of FIG. 1 after installation in the groover grapple of FIG. 2;
FIG. 4 is a schematic illustration of an under-pipeline trenching construction in accordance with one embodiment of the present disclosure;
fig. 5 is a split elevation view of a diaphragm wall rebar cage according to one embodiment of the present disclosure;
fig. 6 is a split top view of a diaphragm wall rebar cage according to one embodiment of the present disclosure;
FIG. 7 is a schematic illustration of a reserved wire rope according to one embodiment of the present disclosure;
fig. 8-18 are separate hoisting process diagrams of the underground diaphragm wall reinforcement cage of fig. 5;
fig. 19 is a flow chart illustrating steps of a method for constructing a buried pipeline continuous wall according to an embodiment of the present disclosure.
In the figure; 100. installing a bolt hole; 200. an anti-drop hole; 300. bucket teeth of a hydraulic grooving machine; 400. a doctor blade housing; 50. grab bucket of hydraulic grooving machine; 60. an anti-falling hanging piece; 70. a doctor blade mount; 80. an anti-falling steel wire rope; 90. a side digging scraper mechanism; 110. Grooved areas (trench holes have been excavated in the ground wall); 130. pipeline lower earth column; 140. a first grabbing and excavating part of the soil column below the pipeline; 150. and a second grabbing and excavating part of the soil column below the pipeline.
1. Buried pipeline; 2. a reinforcement cage under the pipeline; 3. a steel reinforcement cage is arranged on the pipeline; 4. a pipeline side steel reinforcement cage 1; 5. a pipeline side steel reinforcement cage 2; 6. pipeline affected area; 7. a concrete pouring conduit bin; 8. a steel wire rope at the bottom of the steel reinforcement cage under the pipeline; 9. rope replacement is carried out on the top of the reinforcement cage below the pipeline; 10. a steel reinforcement cage lifting rope under the pipeline; 11. a guide rope; 12. a hanging ring; 13. and a steel reinforcement cage lifting rope is arranged on the pipeline.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 4, one embodiment of the present disclosure provides a submerged pipeline under-grooving side-digging scraper mechanism that is used in combination with a grooving machine to solve the soil excavation problem directly under the submerged pipeline under the condition of in-situ protection of the submerged pipeline.
Specifically, the side-cutting scraper mechanism 90 includes: a doctor blade housing 400 having opposite connection ends 101 (the connection ends 101 being left ends when facing fig. 1) and a bearing end 102 (the bearing end 102 being right ends when facing fig. 1); the tooth 300 is fixedly mounted to the carrying end 102 of the doctor blade housing 400. The connecting end 101 of the scraper box 400 is detachably and fixedly arranged on one side of the grab bucket 50 of the grooving machine; the length of the scraper box 400 is not less than half the width of the buried pipeline 1. The side-cutting scraper mechanism 90 is mounted on one side of the bucket when the lower grooving of the buried pipeline 1 is required, and can be detached from the bucket when the lower grooving operation is completed.
The plurality of teeth 300 are arranged in a direction perpendicular to the length direction (the width direction or the extension direction of the buried line) of the doctor blade case 400. The front end of the bucket tooth 300 is in a conical structure and is welded or integrated on a rectangular body (cuboid), and the bucket teeth 300 are distributed along the width direction to form a shovel body structure with high structural strength. More specifically, to increase the side digging efficiency, the tooth 300 is a groover tooth 300.
To improve structural strength of the doctor blade mechanism, the doctor blade case 400 includes three or more case steel plates arranged in parallel in a width direction thereof, and transverse ribs 25 vertically connecting the plurality of case steel plates. The steel plate with the thickness of more than 20mm is adopted as the steel plate of the box body. The transverse rib 25 is also a steel plate having a thickness of 20mm or more. The transverse rib plates 25 are fixed with the box steel plates through welding, so that the structural strength is ensured. The transverse rib 25 and the box steel plate are rectangular steel plates.
To facilitate the detachable assembly with the grapple 50, one end of the steel plate of the case is provided with a plurality of bolt holes 100 (mounting bolt holes 100) to constitute the connection end 101. The other ends of the box steel plates are vertically connected with an end plate 26, and a plurality of bucket teeth 300 are fixedly connected to the end plate 26. The end plate 26 is fixedly welded with a plurality of connecting blocks 30. The plurality of connection blocks 30 are connected to the plurality of teeth 300 in one-to-one correspondence. The connecting block 30 has a (rectangular) welding surface bonded to the end plate 26 and a projecting portion 31 projecting outward from one side of the back-to-welding surface; the tooth 300 is fixedly welded to the projection 31. The connection block 30 is generally L-shaped. A spacing part (spacing gap) is corresponding between two adjacent box steel plates; the number of the bucket teeth 300 is equal to that of the spacing parts, and each bucket tooth 300 is centrally arranged on the front side of each spacing part in a one-to-one correspondence manner.
The present disclosure also provides a channeling machine, comprising: the grab 50 and the buried pipeline 1 lower grooving side scraping mechanism 90 detachably and fixedly installed on one side of the grab 50 are adopted as the buried pipeline 1 lower grooving side scraping mechanism. The width of the scraper box 400 is equal to the width of the groover grab 50. In the open position of the grapple 50, the side-digging scraper mechanism is in a horizontal position as shown in fig. 3.
In order to prevent the side digging scraper mechanism 90 from falling off in the soil digging process, at least one of the box steel plates is provided with an anti-falling hole 200, and one side of the grab bucket 50 is also provided with an anti-falling hanging piece 60 at the upper side of the scraper mechanism; the anti-falling hanging piece 60 is in a hanging plate structure with a bolt hole, and the anti-falling hanging piece 60 is connected with the anti-falling hole 2 through an anti-falling steel wire rope 80 or a hinged anti-falling connecting plate.
The end of each doctor case steel plate is provided with a plurality of bolt holes 100 arranged up and down. A scraper mounting member 70 is fixedly connected to one side of the grab 50; the blade mount 70 includes a plurality of pairs of connection lugs arranged in the width direction and in one-to-one correspondence with the case steel plates. Each pair of connecting lug plates are arranged up and down and are fixedly connected with the corresponding steel plate of the scraper box body through bolts. In order to ensure structural strength, side scraping of the lower grooving is smoothly carried out, and the scraper mounting piece and the anti-drop hanging piece 60 adopt steel plates with the thickness of more than 20 mm.
As shown in fig. 1 to 4, the under-buried pipeline trenching side cutting blade mechanism 90 is composed of a blade case 400 and a tooth 300. Wherein, the scraper box 400 is welded by adopting a 2cm thick steel plate, the length of the scraper box 400 is not less than half of the influence width of the buried pipeline 12 (the width of the covered area of the buried pipeline 12 and the peripheral protection measures thereof), and the width of the scraper box 400 is equal to the width of the grab bucket 50 of the grooving machine. The lower grooving side scraping knife mechanism 90 of the buried pipeline 1 is connected with the grooving machine grab bucket 50 through bolts 10, and the concrete mode is that the anti-drop hanging piece 60 of the side scraping knife mechanism 90 is welded on the grooving machine grab bucket 50. The anti-drop hanger 60 is formed by processing a 2cm thick steel plate and is provided with two bolt holes. The side-cutting scraper mechanism 90 is mounted to the side of the groover grab 50 when the earth column below the pipeline is to be cut, and the scraper mounting 70 is bolted in alignment with the bolt holes 100 in the scraper. After the side digging scraper mechanism 90 is connected with the trenching machine grab 50, the steel wire rope 80 is adopted to connect the side digging scraper mechanism 90 and the welded scraper anti-drop hanging piece 60 on the trenching machine grab 50, so that the side digging scraper 90 is prevented from dropping in the soil digging process.
By adopting the construction equipment, the underground diaphragm wall grooving construction step (four-grabbing grooving process) of the influence area of the buried pipeline 1 is as follows:
firstly, before underground continuous wall construction in an influence area of a buried pipeline 1 is constructed, framing adjustment is carried out, the influence area of the buried pipeline is adjusted to the middle position of the underground continuous wall, groove forming construction is facilitated on two sides of the influence area of the buried pipeline, and meanwhile, the influence groove section of the pipeline is adjusted to be first framing construction;
secondly, excavating a pipeline influence area, and constructing guide walls and (buried) pipeline protection measures; the soil body above the pipeline protection measures or the buried pipeline is completely excavated by adopting a conventional method, the protection measures can be to arrange a protection frame or an outer sleeve protection pipe sleeve and the like outside the buried pipeline, as shown in fig. 4, and in the embodiment, a square steel protection frame is arranged outside the buried pipeline; the area of influence of the (buried) pipeline described in this embodiment is the area of the buried pipeline and its protection measures and its coverage area.
Thirdly, excavating soil bodies at two sides of the influence area of the pipeline in two orders, forming grooved areas at two sides of the buried pipeline, wherein the grooved depth is 1m greater than the design depth, and facilitating hoisting of the subsequent reinforcement cage in place;
fourthly, installing a side digging scraper mechanism 90 on the grooving machine, marking a grab side digging start mark on the grab bucket 50, slowly opening the grab bucket of the grooving machine after the grooving grab bucket 50 is lowered to a design position from the grooving area 110, continuously lifting the grab bucket of the grooving machine to completely scrape the soil column 140 (the first grabbing and digging part 140 of the soil column below the pipeline) on one side of the soil column 130 below the pipeline after the grooving machine is translated to the design position, and taking out scraped soil from the tank bottom by adopting the grab bucket at intervals in the process of side digging and scraping;
fifthly, after the side digging and scraping of the soil column on one side of the soil body below the buried pipeline 1 is completed, the grooving machine is opened to a grooving section position on the other side of the pipeline influence area, and the fourth step is repeated to completely excavate the residual soil column 150 (the second grabbing and excavating part 150 of the soil column below the pipeline;
and sixthly, after the soft soil part is completely excavated, adopting a rotary drilling rig to excavate a rock entering part, and adopting a rotary drilling rig to enter the rock in a cross-slot inclined drilling mode for the groove section below the pipeline.
To ensure the safety of the pipeline during the construction of the ground wall, pipeline protection measures such as a protection frame and a guide wall structure are poured into a whole, and the depth of the guide wall is required to be more than 0.5m below the bottom elevation of the pipeline in the process. Although soil bodies on two sides are reinforced during construction of the guide wall of the deep buried pipeline (the buried pipeline), collapse risks cannot be completely eliminated, the guide wall is constructed by adopting a sectional reverse construction method to ensure construction safety, the sectional number of the guide wall is determined according to the depth of the guide wall, and the guide wall construction method is described by taking three sections as an example:
the first step: constructing a first section of guide wall, digging grooves together with the ultra-deep guide wall section and the common section, constructing a ground connecting wall guide wall of a pipeline influence area together with the guide walls of the adjacent groove sections to form a whole, and pouring a transverse support inside;
and a second step of: constructing a second section of guide wall, and after the first section of guide wall reaches the design strength and the support between the guide walls is confirmed to be effective, starting the construction of the second section of guide wall, constructing the guide wall to the top surface of the sewage pipe, and pouring a transverse support in the guide wall after the construction is finished;
and a third step of: and constructing a third section of guide wall, starting the construction of the third section of guide wall after the strength of the second section of guide wall reaches the design strength and the effective support is confirmed, and embedding the sewage pipe protection angle steel into the guide wall when the construction of the third section of guide wall is finished until the elevation of the design bottom of the guide wall (the elevation of the bottom of the pipeline is 0.5 m).
Fourth step: and after the guide wall pouring is completed and the condition of removing the template is provided, removing the third-layer guide wall template, and erecting the support. And installing templates by taking four section steel of the pipeline as boundaries, pouring concrete to encapsulate the pipeline, presetting 8 (1) traction ropes at the bottom of a reinforcement cage below the pipeline and 9 (2) replacement ropes at the top of the cage after the templates are removed, and backfilling earthwork, wherein the reserved steel wire ropes are shown in figure 5.
As shown in fig. 5 to 19, in one embodiment of the present disclosure, a method for separately hoisting and constructing a reinforcement cage of an underground diaphragm wall in an affected area of a pipeline is further provided, and the method is implemented after a grooving construction process of the underground diaphragm wall in the affected area of the buried pipeline 1.
Because there is conflict between underground diaphragm wall and the position of the deep buried large-diameter pipeline (buried pipeline), the reinforcement cage cannot be integrally hoisted, and the reinforcement cage needs to be split into four areas for processing and hoisting, in the embodiment, the reinforcement cage is divided into a pipeline lower reinforcement cage 2, a pipeline upper reinforcement cage 3, a pipeline side reinforcement cage 4 and a pipeline side reinforcement cage 5. The split reinforcement cages are connected by adopting concave-convex mortises as shown in fig. 6, reinforcement cages 2 and 3 in the pipeline influence area 6 are arranged to be concave joints, reinforcement cages 4 and 5 on the side surfaces of the pipeline are arranged to be convex joints, and the arrangement purpose is mainly to arrange concrete pouring guide pipe bins 7 in reinforcement cages on two sides of the pipeline influence area.
After the steel bar split design, the arrangement form of the steel bars is the same as that of different steel bar cages, the truss and the hanging point are required to be rearranged according to calculation, and meanwhile, a row of transverse trusses (not shown) are required to be added at the bottom of the steel bar cage 2 under the steel bars because the steel wire ropes 8 are required to be installed at the bottom of the steel bar cage for oblique dragging in the positioning process of the pipeline steel bar cage.
And (5) preparing a reinforcement cage before hoisting. After the construction of the ultra-deep guide wall and the pipeline protection measures is completed, three steel wire ropes are reserved at the positions of the pipeline protection measures and serve as in-place steel wire ropes of the lower steel reinforcement cage of the pipeline, the number of the steel wire ropes is 1 respectively at the bottom of the lower steel reinforcement cage of the pipeline, the number of the steel wire ropes is 2 at the top of the lower steel reinforcement cage of the pipeline, the reserved steel wire ropes are fixed on the top surface of the guide wall, and plain soil is adopted to backfill in the guide wall after the fixation is completed.
The underground diaphragm wall of the pipeline affected area is formed into grooves by adopting a special groove forming mode, and the groove forming mode can adopt the construction method of the four-grabbing groove forming process provided by the embodiment. The slurry level and the reserved steel wire rope are concerned whether the slurry level and the reserved steel wire rope are good or not in the construction process. After the grooving is completed, the groove holes are monitored by adopting an ultrasonic wall measuring instrument, and each grabbing position of the groove holes formed by four grabs is not required to have a larger dislocation. Meanwhile, because the inclined dragging condition exists in the process of positioning the steel reinforcement cage 2 under the pipeline, and the diagonal length of the steel reinforcement cage is longer than that of the steel reinforcement cage, the slotted hole is required to be deepened by 1m in the process of grooving, and the steel reinforcement cage 2 under the pipeline is convenient to position.
The pipeline influences the web section steel reinforcement cage to process at the processing bed-jig components of a whole that can function independently, and the concave joint needs the tight control angle when protruding joint processing, guarantees to connect the fit. After the installation of the steel reinforcement cage on the pipeline is completed, 4 steel wire ropes are installed in the steel reinforcement cage body and used as guide ropes 11 for hoisting and replacing the steel reinforcement cage under the pipeline.
And (3) hoisting the reinforcement cage. After the reinforcement cage hoisting preparation work is completed, the reinforcement cage is hoisted in a split mode, and the hoisting sequence is a pipeline lower reinforcement cage 2, a pipeline upper reinforcement cage 3 and reinforcement cages (4 and 5) on two sides of the pipeline in sequence. As shown in fig. 5 to 19, the specific procedure is as follows:
the first step: the lower reinforcement cage 2 of the pipeline is lifted by adopting a double machine, is moved to the excavated groove section by the main crane after being straightened, and enters the groove from the side of the pipeline. And after the bottom of the lower steel reinforcement cage 2 of the pipeline reaches the slotted hole, connecting a steel wire rope 8 at the bottom of the lower steel reinforcement cage of the pipeline with the bottom of the lower steel reinforcement cage 2 of the pipeline, as shown in fig. 8.
And a second step of: after the connection of the steel wire rope 8 at the bottom of the steel reinforcement cage under the pipeline is completed, the steel reinforcement cage 2 is continuously lowered, and when the steel reinforcement cage 2 is lifted to the notch position of the ground wall under the pipeline, the steel wire rope is replaced by adopting the shoulder pole to fix the steel reinforcement cage. Two lifting ropes on one side of the reinforcement cage 2 close to the pipeline are contacted, two rope changing 9 reserved under the pipeline are installed, and the rope changing 9 is used as a lifting rope after the reinforcement cage 2 under the pipeline moves to a designed position, as shown in fig. 9.
And a third step of: after the steel reinforcement cage rope 9 is installed, the lower steel reinforcement cage 2 of the pipeline is continuously lowered, at this time, only two lifting ropes 10 far away from one side of the pipeline are stressed in the lowering process, the rope 9 is not stressed, and the hidden pipeline is prevented from being stressed due to rope replacement, as shown in fig. 10.
Fourth step: after the lower steel reinforcement cage 2 of the pipeline touches the bottom (the lower steel reinforcement cage lifting rope 10 of the pipeline is not stressed), the crane is adopted again to slightly lift the steel reinforcement cage lifting rope 10, and meanwhile, the auxiliary lifting is adopted to lift the lower steel reinforcement cage bottom steel wire rope 8 of the pipeline and horizontally drag, and the posture of the steel reinforcement cage is shown in figure 11. The main crane and the auxiliary crane must drag synchronously, the auxiliary crane drag tension cannot be too large (smaller than the main crane drag tension), the position of the lifting rope 10 is concerned in the dragging process of the reinforcement cage 2, and the dragging is stopped after the design mark pair reserved on the lifting rope 10 and the guide wall.
Fifth step: after the steel reinforcement cage 2 under the pipeline is dragged to be in place, the steel wire rope 8 at the bottom of the steel reinforcement cage under the pipeline is directly lost to the bottom of the groove for discarding, the steel reinforcement cage lifting rope 10 and the cage top rope 9 are used for lifting the steel reinforcement cage 2 under the pipeline together, after the steel reinforcement cage lifting rope 10 and the rope 9 are aligned with the reserved design marks on the guide wall, the steel reinforcement cage 2 is lowered to the bottom of the groove again, and the steel wire ropes 9 and 10 are fixed on the notch guide wall as shown in fig. 12.
Sixth step: lifting the steel reinforcement cage 3 on the pipeline and translating to the pipeline to affect the notch of the underground diaphragm wall and lowering, and when the bottom of the steel reinforcement cage 3 on the pipeline reaches the notch position, reserving 4 guide steel wire ropes 11 in the steel reinforcement cage 3 on the pipeline, and connecting a cage top lifting rope 10 and a rope replacing 9 on the steel reinforcement cage below the pipeline by adopting lifting rings 12, as shown in fig. 13.
Seventh step: 4 guide ropes 11 in the pipeline upper reinforcement cage 3 are connected with the pipeline lower reinforcement cage 2 upper lifting rope 10 and the rope changing 9, and then the pipeline lower reinforcement cage 2 is continuously lowered, and the guide ropes 11 are reserved in the manual pulling cage in the process so that the pipeline lower reinforcement cage 2 upper lifting rope 10 penetrates out of the pipeline upper reinforcement cage 3. When the steel reinforcement cage 3 on the pipeline is hoisted to the designed position, the shoulder pole is adopted to fix the steel reinforcement cage on the pipeline on the top surface of the guide wall, and the lifting rope 13 of the steel reinforcement cage 3 on the pipeline is released.
Eighth step: after the upper steel reinforcement cage 3 of the pipeline is in place, the lower steel reinforcement cage lifting rope 10 and the rope changing 9 of the pipeline are installed to the main crane to be lifted again in place. After the under-pipeline reinforcement cage 2 is lifted to the designed elevation, the under-pipeline steel wire rope 10 is fixed on the pre-installed carrying pole by adopting a rope clip, as shown in fig. 15. During the process of lifting the lower reinforcement cage 2, attention is paid to crane lifting weight display equipment, and forced lifting is not needed when the lifting weight suddenly increases, so that the damage to a pipeline is prevented.
Ninth step: the side reinforcement cage 4 of the lowering pipeline is hoisted by adopting a conventional hoisting mode, as shown in fig. 16.
Tenth step: the side reinforcement cage 5 of the lowering pipeline is hoisted by adopting a conventional hoisting mode, as shown in fig. 17.
Eleventh step: after the reinforcement cage is lifted, as shown in fig. 18, sand bags (H-shaped steel joints) are filled at two sides of the reinforcement cage or sand bags (flexible joints) are filled after locking pipes are installed, so that the reinforcement cages at two sides slightly move in the middle.
Any numerical value recited herein includes all values of the lower and upper values that are incremented by one unit from the lower value to the upper value, as long as there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of components or the value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the purpose is to explicitly list such values as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. in this specification as well. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be explicitly recited in this description, and all possible combinations of values recited between the lowest value and the highest value are believed to be explicitly stated in the description in a similar manner.
Unless otherwise indicated, all ranges include endpoints and all numbers between endpoints. "about" or "approximately" as used with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.
All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional.
Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.
Claims (8)
1. The construction method of the buried pipeline continuous wall is characterized by comprising the following steps of:
soil bodies at two sides of the pipeline influence area are excavated in two orders according to a conventional grooving mode, grooved areas are respectively formed at two sides of the pipeline influence area, and the grooving depth is greater than the design depth by 1m;
a side digging scraper mechanism is arranged on a grab bucket of the grooving machine, the grab bucket with the side digging scraper mechanism is opened after being lowered to a designed height position from a grooved area, and then the grooving machine is translated to the designed side digging position and then is continuously lifted and pulled to scrape the side soil column of the soil column below the pipeline;
after the soil column on one side of the soil body below the pipeline is scraped by the side digging, opening the groove forming machine to the other side of the pipeline influence area, opening the grab bucket with the side digging scraper mechanism from the grooved area to the designed height position, translating the groove forming machine to the designed side digging position, and continuously lifting the grab bucket of the groove forming machine to scrape the residual soil column of the soil column below the pipeline;
after the soft soil part is completely excavated, a rotary drilling rig is adopted to drill a rock-entering part, and a rotary drilling rig cross-slot inclined drilling mode is adopted to enter the rock for hole repairing on the lower groove section of the pipeline;
after the guide wall and pipeline protection measures are constructed, reserving 3 steel wire ropes at the positions of the pipeline protection measures as steel wire ropes for positioning the lower reinforcement cage of the pipeline, wherein the steel wire ropes are respectively 1 steel wire rope at the bottom of the lower reinforcement cage of the pipeline, and 2 steel wire ropes are replaced at the top of the lower reinforcement cage of the pipeline; the reserved steel wire rope is fixed on the top surface of the guide wall, and plain soil is adopted to backfill the guide wall after the fixation is completed;
after the grooving construction is completed, the reinforcement cage is hoisted in a split mode, and the reinforcement cage is hoisted in sequence: a lower reinforcement cage of the pipeline, an upper reinforcement cage of the pipeline and reinforcement cages on two sides of the pipeline;
after the reinforcement cage is lifted, sand bags are filled at two sides of the reinforcement cage or after lock catch pipes are arranged, the reinforcement cages at two sides are moved towards the middle;
hoisting the steel reinforcement cage split according to the following steps:
lifting and straightening a lower reinforcement cage (2) of the pipeline by adopting a double machine, and then moving the lower reinforcement cage (2) of the pipeline to an excavated groove section by a main crane, wherein the lower reinforcement cage (2) of the pipeline enters the groove from the side edge of the pipeline; connecting a steel wire rope (8) at the bottom of the lower reinforcement cage (2) of the pipeline with the bottom of the reinforcement cage (2) after the bottom of the lower reinforcement cage (2) of the pipeline reaches the slotted hole;
after the connection of the steel wire ropes (8) at the bottom of the steel reinforcement cage under the pipeline is completed, continuously lowering the steel reinforcement cage (2), and when the cage top of the steel reinforcement cage (2) under the pipeline is lifted to the notch position of the ground wall, adopting a shoulder pole to fix the steel reinforcement cage for replacing the steel wire ropes; releasing the lifting rope at one side of the steel reinforcement cage (2) close to the pipeline, installing a rope changing (9) at the top of the lower steel reinforcement cage of the pipeline, and taking the rope changing (9) as the lifting rope after the lower steel reinforcement cage (2) of the pipeline moves to a designed position;
after the installation of the replacement rope (9) at the top of the steel reinforcement cage under the pipeline is completed, continuing to lower the steel reinforcement cage (2) under the pipeline, wherein only the lifting rope (10) far away from one side of the pipeline is stressed in the lowering process, and the replacement rope (9) at the top of the steel reinforcement cage under the pipeline cannot be stressed so as to prevent the hidden pipeline from being stressed due to the replacement of the rope;
the method comprises the steps that after a lower steel reinforcement cage (2) of a pipeline touches the bottom, a lower steel reinforcement cage lifting rope (10) of the pipeline is not stressed, a crane is adopted to slightly lift the steel reinforcement cage lifting rope (10), meanwhile, a steel wire rope (8) at the bottom of the lower steel reinforcement cage of the pipeline is lifted by auxiliary lifting, the lower steel reinforcement cage (2) of the pipeline is horizontally dragged, and dragging is stopped after the lifting rope (10) is aligned with a reserved design mark on a guide wall;
after the lower steel reinforcement cage (2) of the pipeline is dragged into place, directly losing the steel wire rope (8) at the bottom of the lower steel reinforcement cage of the pipeline to the bottom of the tank for discarding, lifting the lower steel reinforcement cage (2) of the pipeline together with the replacement rope (9) at the top of the tank, and after the steel reinforcement cage lifting rope (10) and the replacement rope (9) are aligned with the reserved design marks on the guide wall, re-lowering the steel reinforcement cage (2) to the bottom of the tank, and fixing the replacement rope (9) at the top of the lower steel reinforcement cage of the pipeline and the lower steel reinforcement cage lifting rope (10) of the pipeline to the notch guide wall;
lifting an upper steel reinforcement cage (3) of a pipeline, translating the upper steel reinforcement cage to the pipeline to affect the notch of the underground diaphragm wall and lowering the lower steel reinforcement cage, and connecting a plurality of guide steel wire ropes (11) reserved in the upper steel reinforcement cage (3) of the pipeline with a lower steel reinforcement cage lifting rope (10) of the lower steel reinforcement cage (2) of the pipeline and a top replacement rope (9) of the lower steel reinforcement cage of the pipeline by adopting lifting rings (12) when the bottom of the upper steel reinforcement cage (3) of the pipeline reaches the notch;
after the connection of the steel wire rope (11) with the lower steel reinforcement cage lifting rope (10) and the cage top replacement rope (9) is completed, the lower steel reinforcement cage (2) is continuously lowered, and the steel wire rope (11) is reserved in the lifting cage in the process to enable the lower steel reinforcement cage lifting rope (10) to pass out of the upper steel reinforcement cage (3); when the steel reinforcement cage (3) on the pipeline is hoisted to the designed position, fixing the steel reinforcement cage (3) on the pipeline to the top surface of the guide wall by adopting the shoulder pole, and then releasing the lifting rope (13) of the steel reinforcement cage (3) on the pipeline;
after the steel reinforcement cage (3) on the pipeline is in place, installing a steel reinforcement cage lifting rope (10) and a cage top replacement rope (9) on the pipeline to the main crane for re-lifting in place; after the lower reinforcement cage (2) of the pipeline is lifted to the designed elevation, a rope clamp is adopted to fix the lifting rope (10) of the lower reinforcement cage of the pipeline on a pre-installed carrying pole;
and (5) respectively hoisting the reinforcement cages at the two sides of the lowering pipeline by adopting a conventional hoisting mode.
2. The method of constructing a buried pipeline continuous wall according to claim 1, further comprising the step of, after digging out the soil above the pipeline: and excavating soil above the pipeline by adopting a conventional method, and then constructing guide walls and pipeline protection measures.
3. The method for constructing the buried pipeline continuous wall according to claim 1, wherein the guide wall is constructed by adopting a sectional reverse construction method until the guide wall is designed to have a bottom elevation; the guide wall design bottom elevation is 0.5m below the pipeline bottom elevation.
4. The method for constructing a buried pipeline continuous wall according to claim 1, wherein the guide wall is constructed according to the steps of:
constructing a first section of guide wall, digging grooves together with the ultra-deep guide wall section and the common section, constructing a ground connecting wall guide wall of a pipeline influence area together with the guide walls of the adjacent groove sections to form a whole, and pouring a transverse support inside;
constructing a second section of guide wall, and after the first section of guide wall reaches the design strength and the support between the guide walls is confirmed to be effective, starting the construction of the second section of guide wall, constructing the guide wall to the top surface of the sewage pipe, and pouring a transverse support in the guide wall after the construction is finished;
and constructing a third section of guide wall, and starting the construction of the third section of guide wall after the strength of the second section of guide wall reaches the design strength and the effective support is confirmed, wherein the construction reaches the design bottom elevation of the guide wall, and the sewage pipe protection angle steel is required to be pre-buried into the guide wall during the construction of the third section of guide wall.
5. The method of constructing a buried pipeline diaphragm wall of claim 1, further comprising the steps of: and detecting the grooving quality of the groove section by adopting an ultrasonic wall measuring instrument.
6. The method of constructing a buried pipeline diaphragm wall of claim 1, wherein the scraped soil is fished out of the bottom of the tank by a grab at intervals during the side digging and soil scraping process.
7. The method of constructing a buried pipeline diaphragm wall according to claim 1, wherein a side-cutting scraper mechanism is detachably and fixedly installed at one side of the grab; the side digging scraper mechanism comprises:
the scraper box body is provided with opposite connecting ends and bearing ends; the connecting end of the scraper box body is used for being detachably and fixedly arranged on one side of a grab bucket of the grooving machine;
bucket teeth fixedly arranged at the bearing end of the scraper box body; the bucket teeth are arranged along the length direction perpendicular to the scraper box body; the bucket teeth adopt bucket teeth of a grooving machine.
8. The buried pipeline diaphragm wall construction method of claim 7, wherein said scraper box comprises three or more box steel plates arranged in parallel in a width direction thereof, and a transverse rib vertically connecting a plurality of said box steel plates; one end of the box steel plate is provided with a plurality of bolt holes to form the connecting end, and the other end of the box steel plate is vertically connected with an end plate; the bucket teeth are fixedly connected to the end plate;
the end plate is fixedly welded with a plurality of connecting blocks; the connecting blocks are connected with the bucket teeth in a one-to-one correspondence manner; the connecting block is provided with a welding surface which is jointed and welded with the end plate, and a protruding part which protrudes outwards from one side of the back-to-back welding surface; the bucket teeth are fixedly welded to the protruding portions.
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| JPH09217344A (en) * | 1996-02-08 | 1997-08-19 | Maeda Corp | Construction method of underground continuous wall, and excavator |
| JP2004044083A (en) * | 2002-07-04 | 2004-02-12 | Chem Grouting Co Ltd | Undermining continuous wall construction method and excavation apparatus used therefor |
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Address after: 230000 No.96, Wangjiang East Road, Hefei City, Anhui Province Applicant after: CHINA TIESIJU CIVIL ENGINEERING GROUP Co.,Ltd. Applicant after: THE SECOND CONSTRUCTION CO., LTD. OF CTCE Group Address before: 215000 No. 9, litanghe Road, Xiangcheng District, Suzhou City, Jiangsu Province Applicant before: THE SECOND CONSTRUCTION CO., LTD. OF CTCE Group Applicant before: CHINA TIESIJU CIVIL ENGINEERING GROUP Co.,Ltd. |
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