CN118292426A - Construction method for forming groove protective cylinder on vertical partition wall side and forming groove on vertical partition wall - Google Patents
Construction method for forming groove protective cylinder on vertical partition wall side and forming groove on vertical partition wall Download PDFInfo
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Abstract
The invention relates to the technical field of vertical separation walls. The invention provides a vertical partition wall square forming groove protection cylinder, which comprises square inner ring channel steel, square steel frames, hanging rings and reinforced channel steel; the square inner ring channel steel is arranged at the top and the bottom of the square steel frame and fixedly connected with the square steel frame; the reinforcing channel steel is arranged on the inner wall of the long side of the square steel frame, and two ends of the reinforcing channel steel are respectively abutted against the square inner ring channel steel at the top and the bottom of the square steel frame to form an I-shaped structure; the rings are arranged on the channel steel of the inner ring at the top. The invention provides a method for constructing a vertical partition wall into a groove, which comprises the following steps: s1, leveling a field; s2, paving a steel plate roadbed box; s3, embedding the groove protection barrel; s4, excavating a groove. According to the invention, the steel plate roadbed box is paved as a channel, the embedded square formed groove pile casing is manufactured, and the groove is formed by dry operation, so that the disturbance to stratum is small; the reinforced concrete guide wall does not need to be applied, can be suitable for a narrower working space, and has the advantages of low cost, convenience, flexibility, short construction period, safety and stability.
Description
Technical Field
The invention relates to the technical fields of solid-risk waste landfill sites such as refuse landfill sites and soil restoration construction or municipal construction, building and the like, in particular to a vertical partition wall grooving pile casing and a vertical partition wall grooving construction method.
Background
Although the water amount of the landfill, which is permeated into the garbage pile body under the combined action of the drainage layer and the impermeable layer of the sealing covering system after the landfill is subjected to standard sealing treatment, is greatly reduced, the vertical barrier wall is still necessary because the landfill is a simple landfill without a horizontal impermeable system or the bottom membrane is locally damaged in the landfill operation process, and the leachate is still continuously generated after the household garbage is decomposed, so that the groundwater forms long-term pollution and extremely threatens the surrounding and downstream ecological environment and human health.
The vertical barrier wall is an impermeable barrier wall which is formed by digging a long and narrow deep groove on the ground in foundation engineering, pouring materials such as cement bentonite and the like in the deep groove and is used as a water interception, impermeable and water blocking structure.
The vertical partition wall is usually formed by adopting a slurry retaining wall wet method, and the reinforced concrete guide wall is firstly constructed for wet operation to serve as a notch section supporting, water storage and guiding structure. The guide wall construction has long preparation period, high cost, wet operation needs to treat waste mud, and site safety civilized construction is difficult to ensure. The wet-process grooving machine is generally equipment with large tonnage, the requirement on the foundation is high due to the dead weight of the equipment, and meanwhile, the wet-process grooving machine is required to meet the running water operation of a plurality of large machines and has high requirement on the operation space.
At present, the common machinery for grooving the underground vertical barrier wall foundation of the stratum geological is a double-wheel milling and rotary drilling combined impact drilling and grab bucket grooving machine. However, the grab bucket grooving machine is suitable for loose alluvial substances, is greatly influenced by the compactness of the stratum, is unsuitable for stratum containing large stones, drifting stones, bedrock and the like, and has low drilling efficiency. The double-wheel milling construction is advanced, the efficiency is high, the double-wheel milling construction is suitable for various geological conditions including bedrock, but the equipment is expensive, the price is high, a sufficient and spacious working space is needed, and the requirement on the bearing capacity of the temporary road foundation is high. The impact drill has low cost, is suitable for common soft stratum, and can also select sand gravel, pebbles, bedrock and the like, but has low pore-forming efficiency, long construction period and needs wet pore-forming. The rotary drilling and impact drilling and grab bucket grooving machine has low construction pore-forming efficiency and long construction period, and has lower layer thickness of upper layer miscellaneous filled soil and powdery clay, lower part of stratum with more strongly weathered gritty rocks, shorter axial length and smaller engineering quantity, and the construction cost is higher as the large-scale machine is put into more.
Therefore, the construction process and mechanical model selection of the stratum geological continuous wall foundation grooving are to be improved.
The patent of publication No. CN 107964940A relates to a construction method for grooving an underground diaphragm wall, dividing the ground to be excavated into a plurality of grooved sections according to the design specification of the underground diaphragm wall, and marking a plurality of drilling holes to be drilled above each grooved section; preparing slurry used in drilling; moving the rotary drilling rig to the excavated ground, adjusting the rotary drilling rig to a working state, and aligning a drill bit of the rotary drilling rig to the center of one of the drilling holes; starting the rotary drilling rig, and adopting progressive drilling operation at a drilling position; when the first-stage drilling operation of all drilling holes of the groove section is completed by adopting a jump drilling method, the residual earth and stones between the drilling holes are grabbed by adopting a hydraulic grab bucket to form a first groove body, then the next-stage drilling operation is carried out, and the like until the drilling design depth is reached. The technology adopts a rotary drilling liquid-adding hydraulic grab bucket wet method to form grooves, and reinforced concrete guide walls are needed to be applied.
The patent of publication No. CN 114250762B relates to a method for constructing a foundation of an underground diaphragm wall into a groove, which comprises the following steps of S1, leveling a field; s2, edge cutting; s3, excavating a groove. The construction method is to cut and excavate the groove. Adopting a dry method to form a groove, installing a guide mechanism in a corresponding installation hole, and installing a rope saw cutting machine and a rope saw; the rope saw is driven by the rope saw cutting machine to cut the edge of the foundation groove of the underground diaphragm wall, and the part which is not cut during cutting is cut into the groove by using the hydraulic circular saw installed on the long-arm excavator. The long-arm excavator is adopted in the technical support of the patent, and is large in size, complex in structure, high in oil consumption and high in operation, maintenance and repair cost. Because the length of the arm and the bucket rod is increased, the operation stability is not high, and the bucket capacity is gradually reduced along with the extension of the arm, so that the operation efficiency is affected.
The patent of publication No. CN 111945791A relates to a vertical blocking system of a polluted site and a construction method, wherein the vertical blocking system of the polluted site comprises an underground diaphragm wall and high-pressure jet grouting occluding piles, the underground diaphragm wall is vertically arranged around the polluted site, a plurality of high-pressure jet grouting occluding piles are arranged, and each high-pressure jet grouting occluding pile is distributed at the inner side of a joint of the adjacent underground diaphragm wall and at the internal corner of an inflection point. The barrier system meeting the anti-seepage requirement is formed by underground continuous walls and high-pressure jet grouting occluding piles. And constructing the vertical partition wall by adopting the underground diaphragm wall and the high-pressure jet grouting occluding pile.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the vertical partition wall square formed groove protection cylinder, the formed groove protection cylinder is used for construction, the reinforced concrete guide wall is not required to be arranged, the formed groove protection cylinder can flexibly move, the cost is low, and the vertical partition wall square formed groove protection cylinder is suitable for dry operation to form grooves.
The invention provides a vertical partition wall square forming groove protection cylinder, which comprises square inner ring channel steel, square steel frames, hanging rings and reinforced channel steel; the square inner ring channel steel is arranged at the top and the bottom of the square steel frame and fixedly connected with the square steel frame; the reinforcing channel steel is arranged on the inner wall of the long side of the square steel frame, and two ends of the reinforcing channel steel are respectively abutted against the square inner ring channel steel at the top and the bottom of the square steel frame to form an I-shaped structure; the rings are arranged on the purlin channel steel of the inner ring of the top.
Preferably, the hanging rings are symmetrically arranged on two long side sides of the channel steel of the inner ring at the top.
Specifically, the square inner ring channel steel is fixedly connected with the square steel frame in a welding mode.
The invention also provides a construction method for forming the groove of the vertical barrier wall, which comprises the following steps:
s1, leveling a field
Excavating, backfilling and leveling the ground field of the vertical partition wall;
s2, paving steel plate roadbed box
After the site is leveled, paving steel plate roadbed boxes along the two sides of the axis of the vertical barrier wall to form a temporary channel for mechanical operation;
S3, embedding square forming groove protective cylinder
After the steel plate roadbed box is paved, excavating and burying the formed groove protection barrel provided by the invention; preventing the orifice from collapsing and guiding the drilling hole through the casing device;
S4, excavating to form a groove
And (3) excavating soil in the square groove protective cylinder in the step (S3) and adopting a rotary drilling rig to carry out dry-process operation to excavate and test grooves.
Specifically, in the step S2, after the ground is leveled, the ground to be excavated is divided into a plurality of excavated groove segments according to the design specification of the vertical barrier wall, and then the steel plate roadbed boxes are paved along the two outer sides of the axis of the vertical barrier wall to form the mechanical operation channel.
Specifically, in the step S3, after the square groove casing is buried in a hoisting manner, the two sides of the periphery of the square groove casing are symmetrically filled with backfill and compacted, and the square groove casing is buried 20-40cm higher than the ground.
Specifically, in the step S3, when the bottom soil layer of the groove casing formed by the placement side is not cohesive soil, the soil should be excavated or replaced, and after the clay with the thickness of 300-500mm is backfilled and compacted at the pit bottom, the groove casing is formed by the placement side, so as to avoid soft and collapse of the soil at the bottom opening of the casing; when the installing party forms the groove protective cylinder, the steel wire rope can pass through the hanging ring to tie the batten or the steel bars to be symmetrically tensioned and anchored around, so as to prevent the protective cylinder from channeling downwards.
Specifically, in the step S4, the slotting method specifically includes:
(1) The square groove protection barrel in the step S3 is excavated into a groove by adopting dry operation of rotary drilling;
(2) The groundwater level before digging is controlled to be not less than 0.5m below the working surface;
(3) After the groove is dug, loose soil blocks, residues and the like at the bottom of the groove are removed by utilizing a drill bit of a rotary drilling rig;
(4) After the groove is formed, the groove body is required to be subjected to groove inspection according to design and specification requirements, and the groove body comprises groove forming depth, groove width, verticality, sediment thickness, rock entering depth of the groove bottom and the like;
(5) And the connectors of the adjacent groove sections are drilled and poured through the engagement sleeve, so that integral continuity is realized.
Specifically, in the step S4, the method for inspecting the groove includes that the depth of the cleaned groove body and the thickness of the sediment are inspected to form the groove according to design and specification requirements, and the depth of the groove body is inspected by using a measuring rope; measuring the width of the groove body by adopting a ruler; and judging whether the geological exploration and design drawing requirements are met by adopting the cleaned Kong Zha rock samples and the like, and ensuring that the bottom of the vertical impervious wall forming groove extends into the position of the impermeable layer deep stratum.
The dry process operation referred to in the present invention is a direct dry process operation, as opposed to a "wet process operation", i.e., drilling without the need for injection of water to form a slurry retaining wall.
The beneficial effects are that:
The formed groove pile casing is used for fixing a pile position and guiding drilling holes; protecting the orifice, stabilizing the hole wall and preventing the orifice soil layer from collapsing; the water on the outer surface layer of the isolation hole has the beneficial effects of being capable of isolating water on the outer surface layer of the hole.
According to the construction method for forming the groove of the vertical barrier wall, the steel plate roadbed box is paved to serve as a mechanical equipment construction channel, the embedded square forming groove pile casing is manufactured, the groove is formed in a construction process by dry operation, and disturbance to stratum is small; a slurry pond is not required to be arranged, so that the on-site civilized construction can be easily ensured; and the adjacent vertical barrier wall groove section joints are poured after drilling through a rotary drilling rig of the engagement sleeve, so that the wall body is continuous, and the impervious coefficient of the vertical barrier plastic wall meets the design requirement. The construction method does not need to purchase special mechanical equipment such as ballast, broken stone and the like to construct a road or pour a concrete road, does not need to construct a reinforced concrete guide wall as a vertical partition wall notch supporting structure to prevent the collapse of the orifice, can be suitable for narrower working space environment, and has the advantages of low construction cost, convenience, flexibility, short construction period, safety, stability and reliable quality. The connectors of the adjacent groove sections are drilled and poured through the engagement sleeve, so that integral continuity is realized, measures such as placing a joint pipe and a joint box are not needed, and the investment of auxiliary equipment and materials is reduced.
Drawings
FIG. 1 is a process flow diagram of a method of grooving a vertical barrier wall in accordance with an embodiment of the present invention;
FIG. 2 is a schematic illustration of an adjacent channel segment joint arrangement in an embodiment of the invention;
FIG. 3 is a schematic view of a vertical barrier wall forming a slot casing according to an embodiment of the present invention;
FIG. 4 is a schematic view of a long side orthographic projection of a vertical barrier wall forming a slot casing in accordance with an embodiment of the present invention;
fig. 5 is a schematic view showing an orthographic projection structure of a short side of a vertical barrier wall forming a slot casing according to an embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples. It is to be understood that the examples are illustrative of the present invention and are not intended to be limiting.
Example 1
As shown in fig. 3-5, in an embodiment of the present invention, a groove casing is formed on the vertical partition wall, and includes a square inner ring channel 1, a square steel frame 2, a hanging ring 3, and a reinforcing channel 4; the square inner ring channel steel 1 is arranged at the top and the bottom of the square steel frame 2 and is welded with the square steel frame 2; the reinforcing channel steel 4 is arranged in the depth direction of the inner wall of the long side of the square steel frame 2, and two ends of the reinforcing channel steel 4 are respectively abutted against the square inner ring channel steel 1 at the top and the bottom of the square steel frame 2 to form an I-shaped structure; the hanging ring 3 is arranged on the square inner ring channel steel 1 at the top. The 4 hanging rings 3 are symmetrically arranged on two long side sides of the square inner ring channel steel 1 at the top.
The manufacturing process and parameters of the formed groove casing in the embodiment are as follows:
(1) The square forming groove protecting cylinder is formed by welding a steel plate and channel steel;
(2) Adopting a steel plate made of a Q235 material with the thickness of 2 cm;
(3) The channel steel is U-shaped channel steel, the width is 10cm, the height is 4cm, and the thickness is 1cm;
(4) The width of the outer edge of the square forming groove pile casing is 1.46m, and the effective width of the inner side is 1.32m;
(5) The length of the outer edge of the square forming groove pile casing is 4m, and the effective length of the inner side is 3.8m;
(6) The square forms the groove casing height 2.3m.
According to geological survey reports and on-site exploration and inspection of geological conditions, backfill soil filled with about 2m of the surface layer and powdery clay are adopted as part of the surface layer, and strong weathered sandstone and apoplexy weathered sandstone are adopted as the lower soil layer. The height of the groove casing formed by the manufacturing method is 2.3m, so that the orifice can be protected, the hole wall is stabilized, and the collapse of the orifice soil layer is prevented;
(7) The top opening and the bottom opening of the square forming groove pile casing steel plate surface are respectively welded with a circle of channel steel, two reinforcing channel steel is welded in the longitudinal direction and the depth direction along the two sides of the length direction, the transverse and longitudinal I-shaped welding mode can support and reinforce the pile casing, and the overall stability and the lateral supporting force of the pile casing are improved;
(8) Two sides of the square forming groove protective cylinder along the upper opening in the length direction are welded with two non-cold-drawn steel pipes The smooth steel bar is used as a hanging ring, the width of the hanging ring is 13cm, the length of the hanging ring is 27cm, and the hanging ring is welded on the inner ring channel steel at the top of the steel plate frame.
Example 2
As shown in fig. 1, the present embodiment provides a method for constructing a vertical barrier wall as a groove, comprising the steps of:
s1, leveling a field
The situation of the field in this embodiment is as follows: the vertical partition wall axis is located between the south side of the landfill adjusting pool and the red line of the enclosing wall, the outer slope foot of the enclosing wall is a drainage ditch, the ditch is close to the farmland, the operation space of grooving in the red line is limited, if the farmland is occupied temporarily, related procedures of temporary occupation are needed to be handled by related departments, farmland recovery, acceptance and the like are involved in the follow-up process, the process is complicated, and meanwhile, the construction period is also influenced.
Therefore, the construction method for leveling the field comprises the following steps: notifying garden departments to remove arbor and shrub, removing structures such as red line enclosing walls, in-situ drainage ditches and underground water monitoring wells which affect construction, protecting pipelines such as existing cables, optical fibers and pipelines, using devices such as GPS (global positioning system), level gauges and the like to measure and loft the axes of the vertical baffle wall, setting down slopes, excavating and shaping, leveling the site, utilizing the tracks of the excavator to roll repeatedly, tamping soil layers by the buckets of the excavator, controlling the elevation of the operation range at two sides of the axes of the vertical baffle wall to be consistent, avoiding equipment inclination and affecting the grooving quality.
For the position of insufficient working space, in order to provide stable operation platform for machinery, utilize the better clay backfill of scene soil property to be in enclosure outer escape canal side slope, under the unblocked, the not influence function of use's prerequisite of guaranteeing infrared escape canal, protect the enclosure basis when widening machinery operation platform scope.
S2, paving steel plate roadbed box
After the ground is leveled, dividing the ground to be excavated into a plurality of excavated groove sections according to the design specification of the vertical partition wall, and marking a plurality of drilling sites to be drilled above each groove section. And paving a steel plate roadbed box along the axis of the vertical partition wall to form a mechanical operation channel.
Because the vertical partition wall is positioned between the south side slope of the regulating reservoir and the enclosing wall, the area is a greening area, and the surface layer is filled with backfill soil around 2m, such as excavation and filling of cement, the construction cost is high, the bearing capacity of the foundation for heavy engineering machinery vehicle operation is insufficient, and potential safety hazards such as collapse, instability and dumping and the like can exist. Because the field area is provided with the steel plate roadbed box during operation of the landfill site, the steel plate roadbed box can be reasonably utilized according to local conditions.
The roadbed box can be used for soft soil and complex pavement paving, and is convenient for various heavy equipment such as engineering vehicles, pile machines, diggers, rotary diggers and the like and vehicle traffic construction. The roadbed box is called a movable construction pavement, the movable construction pavement is paved simply and rapidly, energy is saved, and environment is protected, so that the roadbed box is a rapid temporary pavement construction mode, and is the preferable choice for temporary pavement construction and heavy mechanical equipment in-out field construction. The roadbed box can enable the earth-moving vehicle and the construction mechanical equipment to run fast and efficiently, so that the production efficiency is improved, the construction progress is quickened, and the resources are saved. The roadbed box is subjected to a plurality of welding processing procedures, so that the roadbed box is durable and is not easy to deform.
The roadbed box used on site in this embodiment has the following specifications: 5.5m long, 1.5m wide and 0.14m thick.
S3, embedding square forming groove protective cylinder
After the steel plate roadbed box is paved, embedding square forming groove protection cylinders, and symmetrically backfilling and tamping the two sides of the peripheries of the protection cylinders;
The square forming groove casing has the following functions: fixing pile positions and guiding drilling holes; (2) Protecting the orifice, stabilizing the hole wall and preventing the orifice soil layer from collapsing; (3) water on the outer surface of the inner hole of the isolation hole, etc.
S4, excavating to form a groove
The groove protection barrel formed in the step S3 is excavated into a groove by adopting a rotary drilling rig;
the hanging belt penetrates through the square to form a groove protection barrel hanging ring, and the groove protection barrel is formed by hoisting and installing the square on site by using a digging machine. The square formed groove pile casing is flexible and convenient to transport between groove sections, and can be repeatedly used in a turnover mode.
The square forming groove protects 4 rings of a barrel and is fixed on the periphery through the stretching of the steel wire rope to the four directions of the outer side, so that the stability of the protection barrel is ensured, and the protection barrel is prevented from sinking and shifting.
And (3) carrying out groove forming inspection on the depth of the cleaned groove body and the thickness of the sediments according to design and specification requirements:
Detecting the depth of the groove body by adopting a measuring rope;
Measuring the width of the groove body by adopting a ruler;
And judging whether the geological exploration and design drawing requirements are met by adopting the cleaned Kong Zha rock samples and the like, and ensuring that the bottom of the vertical impervious wall forming groove extends into the position of the impermeable layer deep stratum.
Example 3
In another embodiment of the invention, the construction method for forming the groove on the vertical barrier wall specifically comprises the following steps:
S1, leveling a field;
S2, paving a steel plate roadbed box;
dividing the ground to be excavated into a plurality of excavated groove sections according to the design specification of the vertical partition wall, and marking a plurality of drilling holes to be drilled above each groove section. Paving a steel plate roadbed box along the axis of the vertical partition wall to form a mechanical operation channel;
S3, embedding square forming groove protective cylinder
After the steel plate roadbed box is paved, a groove protection barrel is formed by burying the steel plate roadbed box, and backfilling and tamping are symmetrically conducted on two sides of the periphery of the protection barrel.
S4, excavating to form a groove
In the embodiment, an SWDM220 type rotary drilling rig is selected; factors influencing the selection of the rotary drilling bit are numerous, and three aspects are summarized, namely stratum conditions; a drilling machine function; deep hole diameter, ballast thickness, wall protection measures, etc. Because the thickness of the vertical barrier wall is designed to be 1m in the embodiment, the casting quality and the casting effect of the grooving are ensured according to the geological condition, the method adoptsRoller cone drill bit; hole site arrangement is carried out along the axis of the foundation grooving, and a groove protection barrel is formed by excavating a buried square; and (3) moving the rotary drilling rig to two sides of the buried forming groove casing along the steel plate roadbed box, adjusting the rotary drilling rig to a working state, aligning a drill bit of the rotary drilling rig to the center of one of drilling holes, ensuring the stability of the base and the top, and checking the perpendicularity of the rotary drilling rig and correcting the turntable. First adoptThe spiral drill bit with the base drills into soil, the rotary drilling rig is started, the drilling position adopts progressive drilling operation, and the progressive depth is 0.5m-1m each time; when the elevation of the hole bottom is lower than the designed elevation by 0.1-0.2m, the vertical seepage-proof bottom stretches into the position which is not smaller than 2.0m below the water impermeable layer (the wind-converted gritty rock), and the drilling is stopped. In the drilling process, the cut soil blocks are cleaned timely, temporarily stacked on the inner side of a slope toe vertical barrier wall of a south side dam body of the regulating tank, and redundant soil is transported to a pile body to serve as a sealing field to prevent seepage and cover a supporting soil layer with the thickness of 600 mm; when the first stage drilling operation of all drilling holes of the groove section is completed by adopting the jump drilling method, the groove section is replacedThe roller bit can limit the drilling direction, vertically grasp the residual soil and stones between the drilling holes, and then adoptsThe spiral roller bit with the base cleans scattered soil after cutting the groove body, ensures that the sediment thickness meets the design requirement, forms a first groove body, then enters the drilling operation of the next stage, and so on until the drilling design depth is reached. The use of square formed slot casings improves the efficiency of drilling and the accuracy of drilling.
After grooving, the groove body needs to be subjected to groove inspection according to design and specification requirements, and the method specifically comprises the following steps:
Measuring the depth of the groove body by adopting a calibrated measuring rope, and ensuring the groove depth;
measuring the width of the groove body by adopting a calibrated tape measure, and ensuring the casting thickness of the wall body;
And judging the depth of the vertical seepage-proof bottom extending into the impermeable layer by adopting the cleaned hole slag and the like. The trough section needs to refer to geological survey reports, meets the depth requirement of the designed vertical impervious wall, namely, the vertical impervious bottom extends into the impermeable layer to be not less than 2.0m (wind-converted gritty), ensures that a circle of closed vertical baffle wall is formed in a reservoir area of the landfill, can cut off the exposure path and the migration of pollution plumes of pollutants in the polluted site, cannot thoroughly remove the pollutants or reduce the concentration of the pollutants in the polluted site, and can prevent the polluted groundwater from flowing into the downstream. Thus, vertical barrier wall technology can be used alone for risk management of contaminated land areas. For different geological conditions, a proper vertical partition wall structure is selected, so that the operation of a landfill site can be ensured to be carried out smoothly.
In this embodiment, as shown in fig. 2, the adjacent groove segment connectors are drilled and poured through the engagement sleeve, so that integral continuity is realized, measures such as placing a connector pipe and a connector box are not needed, and auxiliary equipment and material investment are reduced.
The present invention has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. It will also be appreciated by persons skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the invention, which variations and modifications fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A vertical barrier wall square forming trough casing, characterized in that: the steel frame comprises square inner ring channel steel, square steel frames, hanging rings and reinforced channel steel; the square inner ring channel steel is arranged at the top and the bottom of the square steel frame and fixedly connected with the square steel frame; the reinforcing channel steel is arranged on the inner wall of the long side of the square steel frame, and two ends of the reinforcing channel steel are respectively abutted against the square inner ring channel steel at the top and the bottom of the square steel frame to form an I-shaped structure; the rings are arranged on the channel steel of the inner ring at the top.
2. A vertical barrier wall forming slot die as defined in claim 1 wherein: and the hanging rings are symmetrically arranged on two long side sides of the channel steel of the inner ring at the top.
3. A vertical barrier wall forming slot die as defined in claim 1 wherein: and the square inner ring channel steel is fixedly connected with the square steel frame in a welding mode.
4. A construction method for forming a groove of a vertical separation wall is characterized by comprising the following steps: the method comprises the following steps:
s1, leveling a field
Excavating, backfilling and leveling the ground field of the vertical partition wall;
s2, paving steel plate roadbed box
After the site is leveled, paving steel plate roadbed boxes along the two sides of the axis of the vertical barrier wall to form a temporary channel for mechanical operation;
S3, embedding square forming groove protective cylinder
After the steel plate roadbed box is paved, excavating and burying the square forming groove protection barrel in any one of claims 1-3;
S4, excavating to form a groove
And (3) excavating soil in the square groove casing in the step (S3) and adopting a rotary drilling rig to carry out dry operation to excavate the groove.
5. The method for constructing a vertical barrier wall as defined in claim 4, wherein: in the step S2, after the site is leveled, the ground to be excavated is divided into a plurality of excavation groove sections according to the design specification of the vertical partition wall, and then the steel plate roadbed boxes are paved along the two outer sides of the axis of the vertical partition wall to form a mechanical operation channel.
6. The method for constructing a vertical barrier wall as defined in claim 4, wherein: in the step S3, after the groove casing is formed by embedding the square in a hoisting mode, symmetrically backfilling soil is tamped at two sides of the periphery of the formed groove casing, and the casing is embedded 20-40cm higher than the ground.
7. The method for constructing a vertical barrier wall as defined in claim 4, wherein: in the step S3, when the bottom soil layer of the groove casing formed by the placement square is not cohesive soil, digging or changing soil, backfilling and tamping clay with the thickness of 300-500mm at the pit bottom, and then forming the groove casing by the placement square so as to avoid soft and collapse of the soil at the bottom opening of the casing; when the installing party forms the groove protective cylinder, the steel wire rope can pass through the hanging ring to tie the batten or the steel bars to be symmetrically tensioned and anchored around, so as to prevent the protective cylinder from channeling downwards.
8. The method for constructing a vertical barrier wall as defined in claim 4, wherein: in the step S4, the slotting method specifically includes:
(1) The square groove protection barrel in the step S3 is excavated into a groove by adopting dry operation of rotary drilling;
(2) The groundwater level before digging is controlled to be not less than 0.5m below the working surface;
(3) After the groove is dug, loose soil blocks, residues and the like at the bottom of the groove are removed by utilizing a drill bit of a rotary drilling rig;
(4) After the groove is formed, the groove body is required to be subjected to groove inspection according to design and specification requirements, and the groove body comprises groove forming depth, groove width, verticality, sediment thickness, rock entering depth of the groove bottom and the like;
(5) And the connectors of the adjacent groove sections are drilled and poured through the engagement sleeve, so that integral continuity is realized.
9. The method for constructing a vertical barrier wall as defined in claim 4, wherein: in the step S4, the method for inspecting the groove is as follows: carrying out groove forming inspection on the depth of the cleaned groove body and the thickness of the sediments according to design and specification requirements, and detecting the depth of the groove body by adopting a measuring rope; measuring the width of the groove body by adopting a ruler; and judging whether the geological exploration and design drawing requirements are met by adopting the cleaned Kong Zha rock samples and the like, and ensuring that the bottom of the vertical impervious wall forming groove extends into the position of the impermeable layer deep stratum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410512733.7A CN118292426A (en) | 2024-04-26 | 2024-04-26 | Construction method for forming groove protective cylinder on vertical partition wall side and forming groove on vertical partition wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410512733.7A CN118292426A (en) | 2024-04-26 | 2024-04-26 | Construction method for forming groove protective cylinder on vertical partition wall side and forming groove on vertical partition wall |
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| CN118292426A true CN118292426A (en) | 2024-07-05 |
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| CN202410512733.7A Pending CN118292426A (en) | 2024-04-26 | 2024-04-26 | Construction method for forming groove protective cylinder on vertical partition wall side and forming groove on vertical partition wall |
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| Country | Link |
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| CN (1) | CN118292426A (en) |
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- 2024-04-26 CN CN202410512733.7A patent/CN118292426A/en active Pending
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