CN108978754A - A kind of continuous trough forming system and the method that continuous subterranean wall is built using it - Google Patents
A kind of continuous trough forming system and the method that continuous subterranean wall is built using it Download PDFInfo
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- CN108978754A CN108978754A CN201810774365.8A CN201810774365A CN108978754A CN 108978754 A CN108978754 A CN 108978754A CN 201810774365 A CN201810774365 A CN 201810774365A CN 108978754 A CN108978754 A CN 108978754A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 claims abstract description 147
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 115
- 239000002689 soil Substances 0.000 claims description 67
- 239000002893 slag Substances 0.000 claims description 64
- 238000005086 pumping Methods 0.000 claims description 49
- 238000002347 injection Methods 0.000 claims description 37
- 239000007924 injection Substances 0.000 claims description 37
- 238000005507 spraying Methods 0.000 claims description 34
- 239000002002 slurry Substances 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 239000011178 precast concrete Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004576 sand Substances 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
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention provides a kind of continuous trough forming system, comprising: cabinet, guide pipe, discharge jet, dreg-drawing pipe, jet assembly, hack cutter；Discharge jet is connected to mud pit, jet assembly；Dreg-drawing pipe is I type, and dreg-drawing pipe connects mud pit；Hack cutter is fixedly installed in below water spray assembly；Cabinet bottom end two sides are provided with 1 guide pipe.The present invention also passes through a kind of method for building continuous subterranean wall using above-mentioned continuous trough forming system, comprising: by subterranean wall construction section in the way of every 6 meters of construction cells sub-unit；It first carries out odd number section to construct to form each continuous subterranean wall of odd number section at wall, the rear even number section that carries out constructs to form each continuous subterranean wall of even number section at wall；The continuous subterranean wall of odd number section and the continuous subterranean wall of even number section are connected to form complete continuous subterranean wall.The present invention has the features such as wall is continuous, at low cost, can be widely applied to underground engineering construction field.
Description
Technical Field
The invention relates to a grooving technology, in particular to a continuous grooving device and a method for building a continuous underground wall by adopting the same.
Background
Trenching techniques are all important methods for constructing underground diaphragm walls. Underground wall construction has been used in embankments, dam containment and the like. With the development of science and technology and economy, underground continuous walls are required to be built for the construction of various large underground buildings, such as underground shopping malls. In various grooving technologies for constructing underground continuous walls, the joints among underground walls are too many, the underground parts of the underground walls are split, the walls are discontinuous, and the like, and a large pile pulling mechanism is often adopted when the joints are pulled out. To remedy the above problems, various types of cost increases are also caused. In recent years, with the rapid development of the technology of subways and the like, the construction of subway stations is also in high-speed and high-efficiency construction like the spring shoots in the rainy season. For this reason, higher and higher demands are also placed on the trenching technology for underground diaphragm wall construction.
Therefore, in the prior art, the underground continuous wall grooving technology has the problems of more joints, easy forking, discontinuous wall, high cost, complex operation and the like.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a continuous grooving apparatus with good joint quality, no split, continuous wall body, high efficiency, continuous operation, low cost and convenient operation, and a method for constructing a continuous underground wall using the same.
In order to achieve the above object, a first technical solution proposed by the present invention is:
a continuous trenching apparatus comprising: the box body is used for installing a water injection pipe, a slag pumping pipe, a spraying assembly and a soil crushing cutter; 2 guide tubes for guiding the boundaries of two ends of the slot holes downwards; the soil crushing cutter is used for crushing the soil blocks among the 2 guide pipes to obtain crushed soil; a jetting pipe for guiding the muddy water from the external high-pressure jetting pump into the jetting assembly; a spraying assembly for spraying muddy water into the crushed soil crushed by the soil crushing cutter to form slurry; the slag pumping pipe is used for discharging the slurry into the slurry tank through an external slag pumping pump; wherein,
the water injection pipe is vertically arranged on one side in the box body, and the water inlet end of the water injection pipe is communicated with slurry through an external high-pressure water injection pumpThe water outlet end of the water jetting pipe is communicated with the water inlet end of the injection assembly, and the water outlet end of the water jetting pipe is positioned at the lower part of the box body; the slag pumping pipe is arranged at the other side in the box body and comprisesThe long-side pipe part of the slag pumping pipe is vertically arranged in the box body, the short-side pipe part of the slag pumping pipe is horizontally arranged, the inlet end of the slag pumping pipe faces the direction of the water jetting pipe, the outlet end of the slag pumping pipe is connected with a mud pit through an external pump, and the slag pumping pipe is positioned above the water spraying assembly; the water spraying assembly is horizontally arranged at the lower part of the box body, the inlet end of the water spraying assembly is communicated with the outlet end of the water jetting pipe, a vertically downward water outlet end is arranged on the water spraying assembly, and the water spraying assembly is positioned below the short side pipe of the slag pumping pipe; the soil crushing cutter is fixedly arranged below the water spraying assembly; two sides of the bottom end of the box body are respectively provided with 1 guide pipe, the horizontal distance of the 2 guide pipes is 1.5 meters, and the height of the 2 guide pipes is 0.3 meter; the thickness of the box is 0.7 m.
In conclusion, the continuous grooving device comprises a box body, 2 guide pipes, a slag pumping pipe, a water injection pipe, a spraying assembly and a soil breaking cutter, wherein the water injection pipe is communicated with a mud pit through a high-pressure water injection pump, and the slag pumping pipe is also communicated with the mud pit through a slag pumping pump. The jetting pipe conveys the muddy water in the muddy basin to the jetting assembly under the power action provided by the high-pressure jetting pump, the muddy water is jetted into the soil crushed by the soil crushing cutter among the 2 guide pipes by the jetting assembly, and the residue pumping pipe discharges the mud formed among the 2 guide pipes into the muddy basin under the power action provided by the pump check pump. Thus, the continuous grooving apparatus of the present invention can be used to form slotted holes. Therefore, the continuous grooving device is simple in structure, low in cost and convenient to operate; moreover, the device can realize the cyclic utilization of slurry water energy, so the continuous grooving device of the invention also saves energy.
In order to achieve the above object, a second technical solution proposed by the present invention is:
a method of constructing a continuous underground wall using the continuous trenching apparatus of claim 1 comprising the steps of:
1, dividing an underground wall construction section into N construction units from the starting end of the underground wall construction section in a manner of one construction unit per 6 meters; wherein N is a natural number.
Step 2, forming a guide hole i1 at the initial end of each odd construction unit by using a drill bit; then, a pilot hole is formed by a drill bit every 1.5 meters from the initial end to the corresponding terminal end, and the following steps are carried out in sequence: a guide hole i2, a guide hole i3, a guide hole i4 and a guide hole i 5; wherein i is 2m-1, m represents construction unit number, m is natural number and m is less than or equal to N.
And 3, sequentially carrying out odd-numbered section wall forming construction on each odd-numbered construction unit from the starting end of the 1 st construction unit along the N construction units of the underground wall construction section according to the sequence of the construction unit numbers from small to large to form each odd-numbered section continuous underground wall.
And 4, forming a guide hole by using a drill bit every 1.5 meters from the initial end between the initial end and the corresponding terminal end in each even number of construction units, sequentially: guide hole j1, guide hole j2, guide hole j 3; wherein j is 2 m.
And 5, sequentially carrying out even-numbered section wall forming construction on each even-numbered construction unit from the starting end of the 2 nd construction unit along the N construction units of the underground wall construction section according to the sequence of the construction unit numbers from small to large to form each even-numbered section continuous underground wall.
And 6, connecting each odd-numbered section of continuous underground wall with the left-side even-numbered section of continuous underground wall or the right-side even-numbered section of continuous underground wall adjacent to the odd-numbered section of continuous underground wall to form the complete continuous underground wall.
In summary, in the method for constructing the continuous underground wall by using the continuous trenching apparatus, the construction section of the underground wall is divided into a plurality of construction units; secondly, segmenting each odd construction unit according to the length of the continuous grooving device, and drilling a guide hole at the end point of each segment by using a drill bit; thirdly, for each odd construction unit, sequentially placing the continuous grooving device between two adjacent guide holes, carrying out continuous grooving device operation on two guide pipes on the continuous grooving device along the adjacent 2 guide holes to form a slotted hole, and building each section of underground wall of each construction unit with the odd serial number after finishing the grooving operation of each construction unit with the odd serial number; and then, segmenting each even number of construction units, drilling a guide hole at each segment of end point by using a drill bit between the head end and the terminal of each even number of construction units without the head end and the terminal of each even number of construction units, and constructing each segment of underground wall of each construction unit with the even number after completing the grooving operation of each construction unit with the even number by adopting the same operation method as each odd number of construction units. Thus, the underground walls of the construction units with odd serial numbers and the underground walls of the construction units with even serial numbers adjacent to the underground walls are connected to form the underground continuous wall of the whole construction section. Therefore, the method for constructing the continuous underground wall by adopting the continuous grooving device realizes the non-deviating connection of each section of underground wall through the combined action of the guide hole and the guide pipe with the special shape, and effectively improves the integral strength and the anti-permeability reliability of the underground wall.
Drawings
FIG. 1 is a front view of the continuous trenching apparatus of the present invention.
FIG. 2 is a left side view of the continuous trenching apparatus of the present invention.
FIG. 3 is a sectional top view of a continuous trenching apparatus B-B of the present invention.
FIG. 4 is a top view of the connection relationship between the water injection pipe, the slag extraction pipe and the box body.
FIG. 5 is a top view of the jetting assembly of the present invention.
FIG. 6 is a front view of the spray assembly of the present invention.
Fig. 7 is a top view of the tool of the present invention.
Fig. 8 is a front view of the tool of the present invention.
Fig. 9 is a left side view of the tool of the present invention.
FIG. 10 is a longitudinal sectional view of the soil crushing cutter of the present invention.
Fig. 11 is a flowchart illustrating a method for constructing a continuous underground wall using the above-described continuous trenching apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a front view of the continuous trenching apparatus of the present invention. FIG. 2 is a left side view of the continuous trenching apparatus of the present invention. FIG. 3 is a top view of a section B-B of the continuous trenching apparatus of the present invention. As shown in fig. 1, 2 and 3, the continuous grooving apparatus according to the present invention includes: the box body 1 is used for installing a water injection pipe 4, a slag pumping pipe 3, an injection assembly 5 and a soil crushing cutter 6; 2 guide tubes 2 for guiding the boundaries of both ends of the slot holes downward; a soil crushing cutter 6 for crushing the soil blocks between the 2 guide pipes to obtain crushed soil; a jetting pipe 4 for guiding muddy water from an external high-pressure jetting pump into the jetting assembly 5; a spray assembly 5 for spraying muddy water into the crushed soil crushed by the soil crushing cutter 6 to form slurry; a slag pumping pipe 3 for discharging the slurry into a slurry tank by an external slag pumping pump; wherein,
the water injection pipe 2 is vertically arranged on one side in the box body 1, the water inlet end of the water injection pipe 2 is communicated with the mud pit through an external high-pressure water injection pump, the water outlet end of the water injection pipe 2 is communicated with the water inlet end of the injection assembly 5, and the water outlet end of the water injection pipe 2 is positioned at the lower part of the box body 1; the slag pumping pipe 3 is arranged at the other side in the box body 1, and the slag pumping pipe 3 isThe shape of the mould is as follows,the long-side pipe part of the slag pumping pipe 3 is vertically arranged in the box body 1, the short-side pipe part of the slag pumping pipe 3 is horizontally arranged, the inlet end of the slag pumping pipe 3 faces the direction of the water jetting pipe 2, the outlet end of the slag pumping pipe 3 is connected with a mud pit through an external pump, and the slag pumping pipe 3 is positioned above the water spraying assembly 5; the water spraying assembly 5 is horizontally arranged at the lower part of the box body 1, the inlet end of the water spraying assembly 5 is communicated with the outlet end of the water jetting pipe 2, the water spraying assembly 5 is provided with a vertically downward water outlet end, and the water spraying assembly 5 is positioned below the short-edge pipe of the slag pumping pipe 3; the soil crushing cutter 6 is fixedly arranged below the water spray assembly 5; the left side and the right side of the bottom end of the box body 1 are respectively provided with 1 guide pipe 2, the horizontal distance of the 2 guide pipes 2 is 1.5 meters, and the height of the 2 guide pipes 2 is 0.3 meter; the thickness of the tank 1 is 0.7 m.
In a word, the continuous grooving device comprises a box body, 2 guide pipes, a slag pumping pipe, a water jetting pipe, a jetting assembly and a soil breaking cutter, wherein the water jetting pipe is communicated with a mud pit through a high-pressure water jetting pump, and the slag pumping pipe is also communicated with the mud pit through a slag pumping pump. The jetting pipe conveys the muddy water in the muddy basin to the jetting assembly under the power action provided by the high-pressure jetting pump, the muddy water is jetted into the soil crushed by the soil crushing cutter among the 2 guide pipes by the jetting assembly, and the residue pumping pipe discharges the mud formed among the 2 guide pipes into the muddy basin under the power action provided by the pump check pump. Thus, the continuous grooving apparatus of the present invention can be used to form slotted holes. Therefore, the continuous grooving device is simple in structure and low in cost; moreover, the device can realize the cyclic utilization of slurry water energy, so the continuous grooving device of the invention also saves energy.
In the continuous grooving device, the flow rate of the high-pressure water jet pump is 200-250 cubic meters per hour, and the lift is 50-70 meters. In practical application, the high-pressure water injection pump can be specifically determined according to actual conditions.
In the continuous grooving device, the slag pump has a head of 18 meters, a flow rate of 160 cubic meters per hour, a maximum passing particle size of 70 millimeters, a maximum sand pumping concentration of 60 percent, a submerged suction head of 15 meters and a matched power of 13.41 kilowatts. At this time, the diameter of the slag-extracting wiping pipe 3 is 4. In practical application, the slag pump can be specifically determined according to actual conditions.
The water injection pipe 2 is vertically arranged on one side in the box body 1, the water inlet end of the water injection pipe 2 is communicated with the mud pit through an external high-pressure water injection pump, the water outlet end of the water injection pipe 2 is communicated with the water inlet end of the injection assembly 5, and the water outlet end of the water injection pipe 2 is positioned at the lower part of the box body 1; the slag pumping pipe 3 is arranged at the other side in the box body 1, and the slag pumping pipe 3 isThe long-edge pipe part of the slag pumping pipe 3 is vertically arranged in the box body 1, the short-edge pipe part of the slag pumping pipe 3 is horizontally arranged, the inlet end of the slag pumping pipe 3 faces the direction of the water jetting pipe 2, the outlet end of the slag pumping pipe 3 is connected with a mud pit through an external pump, and the slag pumping pipe 3 is positioned above the water spraying assembly 5; the water spraying assembly 5 is horizontally arranged at the lower part of the box body 1, the inlet end of the water spraying assembly 5 is communicated with the outlet end of the water jetting pipe 2, the water spraying assembly 5 is provided with a vertically downward water outlet end, and the water spraying assembly 5 is positioned below the short-edge pipe of the slag pumping pipe 3; the soil crushing cutter 6 is fixedly arranged below the water spray assembly 5; the left side and the right side of the bottom end of the box body 1 are respectively provided with 1 guide pipe 2, the horizontal distance of the 2 guide pipes 2 is 1.5 meters, and the height of the 2 guide pipes 2 is 0.3 meter; the thickness of the tank 1 is 0.7 m.
In the invention, the periphery of the lower end of the box body 1 is flat-bottomed and serrated, and the lower end of the soil crushing cutter 6 is also flat-bottomed and serrated. In practical application, the periphery of the lower end of the box body 1 is in a flat-bottom sawtooth shape, and the lower end of the soil crushing cutter 6 is in a flat-bottom sawtooth shape, so that resistance applied in the sinking process of the continuous grooving device is further reduced, and the continuous grooving device also has the function of cutting soil.
In practical application, the continuous grooving device further comprises: 2 or 4 lifting lugs 7; wherein, 2 or 4 lugs 7 are symmetrically positioned at the top ends of two sides of the box body 1. When it is desired to use the continuous trenching apparatus of the present invention, the continuous trenching apparatus may be moved by fixing 2 or 4 lifting lugs 7 to the crane.
In the continuous grooving device, 2 guide pipes 2 and a box body 1 are of an integral structure, the cross section ends of the 2 guide pipes 2 are of a semicircular structure, and the arc side faces the inner side.
FIG. 4 is a top view of the connection relationship between the water injection pipe, the slag extraction pipe and the box body. In the invention, the water injection pipe 2 and the slag extraction pipe 3 are both fixed on the inner wall of the front side of the box body 1 and the inner wall of the rear side of the box body through the channel steel 8. FIG. 5 is a top view of the jetting assembly of the present invention. FIG. 6 is a front view of the spray assembly of the present invention. As shown in fig. 5 and 6, in the continuous grooving apparatus according to the present invention, the injection assembly 5 includes: a shooting pipe 51, more than 9 nozzles 52, and a fixing piece 53; the grout spraying pipe 51 comprises 3 paths of branch pipes which are arranged in an E shape, the lumped end of the 3 paths of branch pipes is communicated with the water outlet end of the water spraying pipe 2, and the dispersed ends of the 3 paths of branch pipes are sealed; more than 3 nozzles 52 are arranged on each branch pipe, and the distance between the outlet end of each nozzle 52 and the inner side of the bottom of the box body 1 is 0.1 meter; for all the nozzles 52, every other nozzle 52 is provided with a channel steel 53 at the connection of the nozzle 52 with the slurry injection pipe 51. Here, the channel steel 53 plays a role of fixing.
In the jet assembly of the present invention, the nozzle flow rate was 9.8 m/s and the nozzle diameter was 20 mm. In practical application, the number, diameter, flow rate and distance between nozzles can be determined according to practical conditions
Fig. 7 is a top view of the tool of the present invention. Fig. 8 is a front view of the tool of the present invention. Fig. 9 is a left side view of the tool of the present invention. FIG. 10 is a longitudinal section of the soil breaking blade of the present invention. As shown in fig. 7, 8, 9 and 10, in the continuous grooving apparatus of the present invention, the soil crushing cutters 6 are of a front-back symmetrical structure, the middle part is provided with more than 3 soil crushing cutters installed in a sequence from left to right or from right to left, the upper part is provided with more than 3 soil crushing cutters installed in a sequence from left to right or from right to left, and the lower part is provided with more than 3 soil crushing cutters installed in a sequence from left to right or from right to left; the soil crushing knives arranged on the upper part and the soil crushing knives arranged in the middle part are installed in a staggered mode, the soil crushing knives arranged on the lower part and the soil crushing knives arranged in the middle part are installed in a staggered mode, and the soil crushing knives on the upper part and the soil crushing knives on the lower part are symmetrically installed; all the soil crushing cutters are vertically downward. The double-sided milling cutter of hack sword lower extreme, hack sword both sides shop welds 3 millimeters wearing layer.
Fig. 11 is a flowchart illustrating a method for constructing a continuous underground wall using the above-described continuous trenching apparatus according to the present invention. As shown in fig. 11, the method for constructing a continuous underground wall according to the present invention using the above continuous trenching apparatus comprises the steps of:
1, dividing an underground wall construction section into N construction units from the starting end of the underground wall construction section in a manner of one construction unit per 6 meters; wherein N is a natural number.
Step 2, forming a guide hole i1 at the initial end of each odd construction unit by using a drill bit; then, a pilot hole is formed by a drill bit every 1.5 meters from the initial end to the corresponding terminal end, and the following steps are carried out in sequence: a guide hole i2, a guide hole i3, a guide hole i4 and a guide hole i 5; wherein i is 2m-1, m represents construction unit number, m is natural number and m is less than or equal to N.
In practice, to prevent mud from sticking to the fore shaft, isolation measures should be taken before the fore shaft is placed in each pilot hole. This part is the prior art and will not be described herein.
In the step 2, all the guide holes i1, i2, i3, i4 and i5 in each odd construction unit are round holes with the depth of 20.3 meters and the cross section diameter of 0.7 meter.
In the step 2, the fore shaft pipe is a circular pipe with the height of 20.3 meters and the diameter of the cross section of 0.7 meter.
And 3, sequentially carrying out odd-numbered section wall forming construction on each odd-numbered construction unit from the starting end of the 1 st construction unit along the N construction units of the underground wall construction section according to the sequence of the construction unit numbers from small to large to form each odd-numbered section continuous underground wall.
And 4, forming a guide hole by using a drill bit every 1.5 meters from the initial end between the initial end and the corresponding terminal end in each even number of construction units, sequentially: guide hole j1, guide hole j2, guide hole j 3; wherein j is 2 m.
In the step 4, all the guide holes j1, j2 and j3 in the even construction units are round holes with the depth of 20.3 meters and the cross section diameter of 0.7 meter.
And 5, sequentially carrying out even-numbered section wall forming construction on each even-numbered construction unit from the starting end of the 2 nd construction unit along the N construction units of the underground wall construction section according to the sequence of the construction unit numbers from small to large to form each even-numbered section continuous underground wall.
And 6, connecting each odd-numbered section of continuous underground wall with the left-side even-numbered section of continuous underground wall or the right-side even-numbered section of continuous underground wall adjacent to the odd-numbered section of continuous underground wall to form the complete continuous underground wall.
In summary, in the method for constructing the continuous underground wall by using the continuous trenching apparatus, the construction section of the underground wall is divided into a plurality of construction units; secondly, segmenting each odd construction unit according to the length of the continuous grooving device, and drilling a guide hole at the end point of each segment by using a drill bit; thirdly, for each odd construction unit, sequentially placing the continuous grooving device between two adjacent guide holes, carrying out continuous grooving device operation on two guide pipes on the continuous grooving device along the adjacent 2 guide holes to form a slotted hole, and building each section of underground wall of each construction unit with the odd serial number after finishing the grooving operation of each construction unit with the odd serial number; and then, segmenting each even number of construction units, drilling a guide hole at each segment of end point by using a drill bit between the head end and the terminal of each even number of construction units without the head end and the terminal of each even number of construction units, and constructing each segment of underground wall of each construction unit with the even number after completing the grooving operation of each construction unit with the even number by adopting the same operation method as each odd number of construction units. Thus, the underground walls of the construction units with odd serial numbers and the underground walls of the construction units with even serial numbers adjacent to the underground walls are connected to form the underground continuous wall of the whole construction section. Therefore, the method for constructing the continuous underground wall by adopting the continuous grooving device realizes the non-deviation connection of the underground walls by the slot mode between the adjacent underground walls of the sections through the combined action of the guide holes and the guide pipes with special shapes, and effectively improves the integral strength and the impermeability reliability of the underground walls.
In the method for constructing the continuous underground wall by adopting the continuous grooving device, in the step 3, the odd-number-section wall forming construction comprises the following steps:
and 31, sequentially placing the continuous grooving devices between the adjacent guide holes i1 and i2, between the adjacent guide holes i2 and i3, between the adjacent guide holes i3 and i4 and between the adjacent guide holes i4 and i5 by a grooving machine frame in the 2m-1 construction unit to perform odd-section grooving construction.
Step 32, after the grooving construction of each odd-numbered section is finished, adopting a hole inspection device with the length, width and height of 6.0 meters, 0.7 meters and 2.0 meters to inspect and accept each formed odd-numbered section of slotted hole, and cleaning each qualified odd-numbered section of slotted hole; after hole cleaning is completed, a locking pipe is placed in the terminal guide hole 15 of the 1 st construction unit, and locking pipes are respectively placed in the starting end guide holes i1 and the terminal guide holes i5 of the other odd construction units except the 1 st construction unit.
And step 33, taking a precast concrete block which is bound by steel bars in advance and has the thickness of 8 cm as a protective layer, and sinking into each odd-numbered section of slotted hole after hole cleaning.
And step 34, performing concrete pouring on each odd-numbered section of slotted hole with the protective layer placed thereon to form each odd-numbered section of continuous underground wall.
In practical application, both ends of each odd-number section of continuous underground wall formed by the method are wall edges in the shape of concave semicircles.
In the method for constructing the continuous underground wall by adopting the continuous grooving device, in the step 5, the even-number-section wall forming construction comprises the following steps:
51, in the 2m construction unit, sequentially placing the continuous grooving devices between the locking pipe and the guide hole j1 in the adjacent guide hole i5, between the adjacent guide hole j1 and the guide hole j2, between the adjacent guide hole j2 and the guide hole j3, and between the adjacent guide hole j3 and the locking pipe in the guide hole k1 by a grooving machine frame to perform even-number section grooving construction; wherein k is 2m +1, k is less than or equal to N, and k is a natural number.
And step 52, after the grooving construction of each even-numbered section is finished, pulling out the locking notch pipes at two ends of the slotted hole of the even-numbered section, adopting a hole tester with the length, width and height of 6.0 meters, 0.7 meters and 2.0 meters respectively to check and accept each formed slotted hole of the even-numbered section, and cleaning each qualified slotted hole of the even-numbered section.
And step 53, taking a precast concrete block which is bound by steel bars in advance and has the thickness of 8 cm as a protective layer to be sunk into each even-numbered section of slotted hole after hole cleaning.
And step 54, performing concrete pouring on each even-numbered section of the slotted hole with the protective layer placed thereon to form each even-numbered section of the continuous underground wall.
In practical application, both ends of each even-number section of continuous underground wall formed by the method are convex semicircular wall edges.
In the method for constructing the continuous underground wall by adopting the continuous grooving device, the step 31 is specifically as follows: in the 2m-1 construction unit, the continuous grooving device is placed between the adjacent guide hole i1 and the adjacent guide hole i2 by a grooving machine frame, a high-pressure water jet pump and a slag pump are started, two guide pipes of the continuous grooving device respectively work along the guide hole i1 and the guide hole i2 according to the vibration frequency of 20 times/minute and the sinking speed of 1 meter/minute: respectively washing and cutting the soil body in the middle part of the two guide holes by high-pressure muddy water and a soil crushing cutter to form mud, and discharging the mud into an external mud tank by a slag pump to finish the grooving construction with the depth of 20 meters, the width of 0.7 meter and the length of 1.5 meters; correspondingly, the continuous grooving device is sequentially placed between the adjacent guide hole i2 and the guide hole i3, between the adjacent guide hole i3 and the guide hole i4, and between the adjacent guide hole i4 and the guide hole i5 by a grooving machine frame, a high-pressure water jet pump and a slag pump are respectively started, two guide pipes of the continuous grooving device sequentially and respectively carry out the same operation as the operation between the adjacent guide hole i1 and the adjacent guide hole i2 along the guide hole i2 and the guide hole i3, the guide hole i3 and the guide hole i4, and the guide hole i4 and the guide hole i5 according to the vibration frequency of 20 times/minute and the sinking speed of 1 meter/minute, and the construction grooving with the depth of 20 meters, 0.7 meters and 6.0 meters in the 2m-1 construction unit is completed. After the grooving construction of the 2m-1 construction unit is completed, the slotted hole of the 2m-1 construction unit is formed.
In the method for constructing the continuous underground wall by adopting the continuous grooving device, the step 51 is specifically as follows: in the 2m construction unit, the continuous grooving device is placed between the locking pipe and the guide hole j1 in the adjacent guide hole i5 by a grooving machine frame, a high-pressure water jet pump and a slag pump are started, and the two guide pipes of the continuous grooving device respectively operate along the locking pipe and the guide hole j1 in the guide hole i5 according to the vibration frequency of 20 times/minute and the sinking speed of 1 m/minute: respectively washing and cutting the soil body in the middle part of the two guide holes by high-pressure muddy water and a soil crushing cutter to form mud, and discharging the mud into an external mud tank by a slag pump to finish the grooving construction with the depth of 20 meters, the width of 0.7 meter and the length of 1.5 meters; correspondingly, the continuous grooving device is sequentially placed between the adjacent guide holes j1 and j2, between the adjacent guide holes j2 and j3, between the adjacent guide holes j3 and the locking pipes in the guide holes k1 by the grooving machine frame, the high-pressure water jet pump and the slag pump are respectively started, the two guide pipes of the continuous grooving device sequentially and respectively follow the guide holes j1 and j2, the guide holes j2 and j3, the locking pipes in the guide holes j3 and k1, the same operation as the operation between the adjacent guide holes j1 and j2 is carried out according to the vibration frequency of 20 times/minute and the sinking speed of 1 meter/minute, and grooving construction with the depth of 20 meters, 0.7 meters and 6.0 meters in the 2m construction unit is completed. And after the grooving construction of the 2m construction unit is completed, a slotted hole of the 2m construction unit is formed.
In summary, in the method for constructing the continuous underground wall by using the continuous grooving device, the construction of the odd-numbered underground continuous wall is completed by performing a series of construction such as grooving, acceptance, hole cleaning, locking pipe placing, protective layer placing, pouring and the like on the odd-numbered sections, so that the wall edges at the two ends of each odd-numbered underground continuous wall are in the shape of a concave half circle. And then, performing a series of construction such as grooving, pulling out the locking pipe, checking and accepting, cleaning the hole, placing a protective layer, pouring and the like on the even sections to complete the construction of the underground continuous wall of the even sections, so that two ends of the slotted hole of the even sections are in the shape of convex semicircles. Moreover, when the continuous grooving device sinks for construction, the continuous grooving device sinks downwards along the guide hole or the fore shaft pipe, so that the phenomena of dislocation, bifurcation and the like between the even-numbered underground continuous walls and the odd-numbered underground continuous walls can be avoided, and the continuity of the whole underground wall is ensured. In addition, the overall structure condition ensures that the even-number section underground continuous wall and the odd-number section underground continuous wall are in mortise and tenon type inserting connection structures, so that the strength and the impermeability of the underground continuous wall constructed by the underground continuous wall forming method are greatly improved. In practical application, the odd sections are constructed firstly, and the fore shaft pipe is placed after the odd sections are constructed; then, constructing an even number of sections, and pulling out the locking pipe after the construction of the slotted holes of the even number of sections is finished; therefore, the method for constructing the continuous underground wall by the continuous grooving device can easily finish pile pulling without adopting large pile pulling equipment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A continuous trenching apparatus, comprising: the box body is used for installing a water injection pipe, a slag pumping pipe, a spraying assembly and a soil crushing cutter; 2 guide tubes for guiding the boundaries of two ends of the slot holes downwards; the soil crushing cutter is used for crushing the soil blocks among the 2 guide pipes to obtain crushed soil; a jetting pipe for guiding the muddy water from the external high-pressure jetting pump into the jetting assembly; a spraying assembly for spraying muddy water into the crushed soil crushed by the soil crushing cutter to form slurry; the slag pumping pipe is used for discharging the slurry into the slurry tank through an external slag pumping pump; wherein,
the water injection pipe is vertically arranged on one side in the box body, the water inlet end of the water injection pipe is communicated with the mud pit through an external high-pressure water injection pump, the water outlet end of the water injection pipe is communicated with the water inlet end of the injection assembly, and the water outlet end of the water injection pipe is positioned at the lower part of the box body; the slag pumping pipe is arranged at the other side in the box body, the slag pumping pipe is I-shaped, the long-side pipe part of the slag pumping pipe is vertically arranged in the box body, the short-side pipe part of the slag pumping pipe is horizontally arranged, the inlet end of the slag pumping pipe faces the direction of the water jetting pipe, the outlet end of the slag pumping pipe is connected with a mud pit through an external pump, and the slag pumping pipe is positioned above the water spraying assembly; the water spraying assembly is horizontally arranged at the lower part of the box body, the inlet end of the water spraying assembly is communicated with the outlet end of the water jetting pipe, a vertically downward water outlet end is arranged on the water spraying assembly, and the water spraying assembly is positioned below the short side pipe of the slag pumping pipe; the soil crushing cutter is fixedly arranged below the water spraying assembly; the left side and the right side of the bottom end of the box body are respectively provided with 1 guide pipe, the horizontal distance of 2 guide pipes is 1.5 meters, and the height of 2 guide pipes is 0.3 meter; the thickness of the box is 0.7 m.
2. The continuous trenching apparatus as claimed in claim 1, wherein the periphery of the lower end of the box body is in a shape of flat-bottom saw teeth, and the lower end of the soil crushing cutter is also in a shape of flat-bottom saw teeth.
3. The continuous trenching apparatus as recited in claim 1, further comprising: 2 or 4 lifting lugs; wherein, 2 or 4 lugs are symmetrically positioned at the top ends of two sides of the box body.
4. The continuous grooving apparatus according to claim 1, wherein 2 guide pipes are integrated with the box body, and 2 guide pipes are semicircular in cross-sectional end, with a circular arc side facing inward.
5. The continuous trenching apparatus as claimed in claim 1, wherein the water injection pipe and the slag extraction pipe are fixed on the inner wall of the front side of the tank body and the inner wall of the rear side of the tank body through channel steel.
6. The continuous slot forming apparatus of claim 1, wherein the jetting assembly comprises: a shooting pipe, more than 9 nozzles and a fixing piece; the grout spraying pipe comprises 3 paths of branch pipes which are arranged in an E shape, the lumped end of the 3 paths of branch pipes is communicated with the water outlet end of the grout spraying pipe, and the dispersed ends of the 3 paths of branch pipes are sealed; more than 3 nozzles are arranged on each branch pipe, and the distance between the outlet end of each nozzle and the inner side of the bottom of the box body is 0.1 m; for all nozzles, every other nozzle is provided with a channel steel at the connection of the nozzle and the slurry injection pipe.
7. The continuous grooving device according to claim 1 or 2, wherein the soil crushing cutters are of a front-back symmetrical structure, the middle parts of the soil crushing cutters are installed at intervals in the sequence from left to right or from right to left, the upper parts of the soil crushing cutters are installed at intervals in the sequence from left to right or from right to left, and the lower parts of the soil crushing cutters are installed at intervals in the sequence from left to right or from right to left, wherein the number of the soil crushing cutters is more than 3; the soil crushing knives arranged on the upper part and the soil crushing knives arranged in the middle part are installed in a staggered mode, the soil crushing knives arranged on the lower part and the soil crushing knives arranged in the middle part are installed in a staggered mode, and the soil crushing knives on the upper part and the soil crushing knives on the lower part are symmetrically installed; all the soil crushing cutters are vertically downward.
8. The continuous trenching apparatus as claimed in claim 7, wherein the soil breaking blade is provided with a double-sided milling cutter at a lower end thereof, and a 3 mm wear-resistant layer is welded on both sides of the soil breaking blade.
9. A method for constructing a continuous underground wall using the continuous trenching apparatus as claimed in claim 1, wherein the method for constructing a continuous underground wall comprises the steps of:
1, dividing an underground wall construction section into N construction units from the starting end of the underground wall construction section in a manner of one construction unit per 6 meters; wherein N is a natural number;
step 2, forming a guide hole i1 at the initial end of each odd construction unit by using a drill bit; then, a pilot hole is formed by a drill bit every 1.5 meters from the initial end to the corresponding terminal end, and the following steps are carried out in sequence: a guide hole i2, a guide hole i3, a guide hole i4 and a guide hole i 5; wherein i is 2m-1, m represents the ordinal number of a construction unit, m is a natural number and m is less than or equal to N;
step 3, sequentially carrying out odd-numbered section wall forming construction on each odd-numbered construction unit from the starting end of the 1 st construction unit along the N construction units of the underground wall construction section according to the sequence of the construction unit from small to large to form each odd-numbered section continuous underground wall;
and 4, forming a guide hole by using a drill bit every 1.5 meters from the initial end between the initial end and the corresponding terminal end in each even number of construction units, sequentially: guide hole j1, guide hole j2, guide hole j 3; wherein j is 2 m;
step 5, sequentially carrying out even-numbered section wall forming construction on each even-numbered construction unit from the starting end of the 2 nd construction unit along the N construction units of the underground wall construction section according to the sequence of the construction unit from small to large to form each even-numbered section continuous underground wall;
and 6, connecting each odd section of continuous underground wall with the adjacent left even section of continuous underground wall or the right even section of continuous underground wall to form the complete continuous underground wall.
10. The method for constructing a continuous underground wall using the continuous trenching apparatus as claimed in claim 1, wherein the odd-numbered stage wall-forming construction in the step 3 comprises the steps of:
31, sequentially placing the continuous grooving devices between adjacent guide holes i1 and i2, between adjacent guide holes i2 and i3, between adjacent guide holes i3 and i4 and between adjacent guide holes i4 and i5 by a grooving machine frame in the 2m-1 construction unit to perform odd-section grooving construction;
step 32, after the grooving construction of each odd-numbered section is finished, adopting a hole inspection device with the length, width and height of 6.0 meters, 0.7 meters and 2.0 meters to inspect and accept each formed odd-numbered section of slotted hole, and cleaning each qualified odd-numbered section of slotted hole; after hole cleaning is finished, a fore shaft pipe is placed in a terminal guide hole of the 1 st construction unit, and fore shaft pipes are respectively placed in initial end guide holes and terminal guide holes of the other odd construction units except the 1 st construction unit;
step 33, taking a precast concrete block which is bound by steel bars in advance and has the thickness of 8 cm as a protective layer to be sunk into each odd-numbered section of slotted hole after hole cleaning;
and step 34, performing concrete pouring on each odd-numbered section of slotted hole with the protective layer placed thereon to form each odd-numbered section of continuous underground wall.
11. The method for constructing a continuous underground wall according to claim 10, wherein the even-numbered stage wall forming construction in step 5 comprises the steps of:
51, in the 2m construction unit, sequentially placing the continuous grooving devices between the locking pipe and the guide hole j1 in the adjacent guide hole i5, between the adjacent guide hole j1 and the guide hole j2, between the adjacent guide hole j2 and the guide hole j3, and between the adjacent guide hole j3 and the locking pipe in the guide hole k1 by a grooving machine frame to perform even-number section grooving construction; wherein k is 2m +1, k is less than or equal to N, and k is a natural number;
step 52, after the grooving construction of each even-numbered section is completed, pulling out the locking notch pipes at two ends of the slotted hole of the even-numbered section, adopting a hole tester with the length, width and height of 6.0 meters, 0.7 meters and 2.0 meters respectively to check and accept each formed slotted hole of the even-numbered section, and cleaning each qualified slotted hole of the even-numbered section;
step 53, taking a precast concrete block which is bound by steel bars in advance and has the thickness of 8 cm as a protective layer to be sunk into each even-numbered section of slotted hole after hole cleaning;
and step 54, performing concrete pouring on each even-numbered section of the slotted hole with the protective layer placed thereon to form each even-numbered section of the continuous underground wall.
12. A method of constructing a continuous underground wall according to claim 10, wherein the step 31 is embodied as: in the 2m-1 construction unit, the continuous grooving device is placed between the adjacent guide hole i1 and the adjacent guide hole i2 by a grooving machine frame, a high-pressure water jet pump and a slag pump are started, two guide pipes of the continuous grooving device respectively work along the guide hole i1 and the guide hole i2 according to the vibration frequency of 20 times/minute and the sinking speed of 1 meter/minute: respectively washing and cutting the soil body in the middle part of the two guide holes by high-pressure muddy water and a soil crushing cutter to form mud, and discharging the mud into an external mud tank by a slag pump to finish the grooving construction with the depth of 20 meters, the width of 0.7 meter and the length of 1.5 meters; correspondingly, the continuous grooving device is sequentially placed between the adjacent guide hole i2 and the guide hole i3, between the adjacent guide hole i3 and the guide hole i4, and between the adjacent guide hole i4 and the guide hole i5 by a grooving machine frame, a high-pressure water jet pump and a slag pump are respectively started, two guide pipes of the continuous grooving device sequentially and respectively carry out the same operation as the operation between the adjacent guide hole i1 and the adjacent guide hole i2 along the guide hole i2 and the guide hole i3, the guide hole i3 and the guide hole i4, and the guide hole i4 and the guide hole i5 according to the vibration frequency of 20 times/minute and the sinking speed of 1 meter/minute, and the construction grooving with the depth of 20 meters, 0.7 meters and 6.0 meters in the 2m-1 construction unit is completed.
13. A method of constructing a continuous underground wall using the continuous trenching apparatus as claimed in claim 1, wherein the step 51 is embodied as: in the 2m construction unit, the continuous grooving device is placed between the locking pipe and the guide hole j1 in the adjacent guide hole i5 by a grooving machine frame, a high-pressure water jet pump and a slag pump are started, and the two guide pipes of the continuous grooving device respectively operate along the locking pipe and the guide hole j1 in the guide hole i5 according to the vibration frequency of 20 times/minute and the sinking speed of 1 m/minute: respectively washing and cutting the soil body in the middle part of the two guide holes by high-pressure muddy water and a soil crushing cutter to form mud, and discharging the mud into an external mud tank by a slag pump to finish the grooving construction with the depth of 20 meters, the width of 0.7 meter and the length of 1.5 meters; correspondingly, the continuous grooving device is sequentially placed between the adjacent guide holes j1 and j2, between the adjacent guide holes j2 and j3, between the adjacent guide holes j3 and the locking pipes in the guide holes k1 by the grooving machine frame, the high-pressure water jet pump and the slag pump are respectively started, the two guide pipes of the continuous grooving device sequentially and respectively follow the guide holes j1 and j2, the guide holes j2 and j3, the locking pipes in the guide holes j3 and k1, the same operation as the operation between the adjacent guide holes i5 and j1 is carried out according to the vibration frequency of 20 times/minute and the sinking speed of 1 meter/minute, and grooving construction with the depth of 20 meters, 0.7 meters and 6.0 meters in the 2m construction unit is completed.
14. The method for constructing a continuous underground wall according to claim 9, wherein the pilot hole is a circular hole having a depth of 20.3 m and a cross-sectional diameter of 0.7 m; the fore shaft pipe is a round pipe with the height of 20 meters and the diameter of the cross section of 0.7 meter.
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Application publication date: 20181211 |