CN115559339A - Construction method of HDPE (high-density polyethylene) film composite flexible underground diaphragm wall - Google Patents
Construction method of HDPE (high-density polyethylene) film composite flexible underground diaphragm wall Download PDFInfo
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- CN115559339A CN115559339A CN202211259278.1A CN202211259278A CN115559339A CN 115559339 A CN115559339 A CN 115559339A CN 202211259278 A CN202211259278 A CN 202211259278A CN 115559339 A CN115559339 A CN 115559339A
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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Abstract
The application provides a construction method of an HDPE film composite flexible underground diaphragm wall, which comprises the following steps: s1, excavating Shi Gongcao, and determining a first preset position and a second preset position in a construction groove; s2, arranging the HDPE membrane with the end part welded with the lock joint to a first preset position; s3, arranging the joint box device to a second preset position, and inserting the joint box device and the lock joint; s4, filling a filling material into the construction groove; and S5, taking the joint box device out of the second preset position before the filling material is solidified and the subsequent membrane is arranged below, and separating the lock joint from the joint box device and keeping the lock joint in a complete state. In this application can realize the compound flexible secret cut-off wall work progress of HDPE membrane, technical segmentation, divide the protection to HDPE diaphragm lock joint when preface construction or construction interrupt, HDPE diaphragm lock joint difficulty when avoiding follow-up construction has guaranteed efficiency of construction and quality.
Description
Technical Field
The application relates to the technical field of engineering such as civil engineering, mines, water conservancy and environment, in particular to a construction method of a HDPE (high-density polyethylene) film composite flexible underground diaphragm wall.
Background
The HDPE diaphragm is widely used in the engineering fields of civil engineering, mines, water conservancy, environment and the like at home, has very good corrosion resistance and extensibility as an anti-seepage or isolation effect, is mature and produced at home, is up to 3mm in thickness and more than 6 m in width, is lapped into any breadth by adopting mature hot melting welding, is mature in detection technology, and is widely used in the engineering fields of waterproof or isolation barriers of open-air refuse landfills, tunnels, underground structures and the like. The flexible underground impervious wall mainly comprises a clay slurry wall, a bentonite clay slurry wall, a self-setting mortar wall and the like, and has certain application in China due to good settlement adaptability and impervious performance. In order to further improve the impermeability, durability and reliability of the above-mentioned underground flexible underground diaphragm wall, the HDPE film composite flexible underground diaphragm wall is also gradually applied domestically.
The HDPE film composite flexible underground diaphragm wall construction firstly carries out underground diaphragm wall slotting operation, carries out lower installation of HDPE membranes after slotting the underground diaphragm wall with a certain length, carries out sealing filling or pouring on two sides (or one side) of the membranes, and is connected with the membranes in an inserting and interlocking manner through HDPE locking connectors welded at two ends of the membranes.
In the construction process, the HDPE film composite flexible underground diaphragm wall is required to be constructed in a segmented or sequential manner or interrupted in technical construction, and the wall body is required to be filled with the sealing material which can wrap the HDPE lock joint and can be solidified, so that the situation that the subsequent HDPE film cannot be normally locked with the HDPE lock joint of the preceding film is caused, the potential quality problem of the joint part is caused, and the construction quality and efficiency of the HDPE film composite flexible underground diaphragm wall are seriously influenced. Therefore, the application provides a construction method of the HDPE film composite flexible underground diaphragm wall.
Disclosure of Invention
The application aims to solve the problems and provide a construction method of an HDPE film composite flexible underground diaphragm wall.
The application provides a construction method of an HDPE film composite flexible underground diaphragm wall, which comprises the following steps:
s1, excavating Shi Gongcao, and determining a first preset position and a second preset position in a construction groove;
s2, arranging the HDPE membrane with the end part welded with the lock joint to the first preset position below the HDPE membrane;
s3, setting the lower part of the joint box device to the second preset position, and inserting the joint box device and the lock joint;
s4, filling a filling material into the construction groove;
and S5, before the filling material is set below the subsequent diaphragm after solidification, taking the joint box device out of the second preset position, and separating the lock joint from the joint box device and keeping the lock joint in a complete state.
According to the technical scheme provided by some embodiments of the application, in step S3, before the joint box device is arranged below the second preset position, a plurality of joint box sections with proper number are selected according to the depth of Shi Gongcao, and all the joint box sections are sequentially spliced and installed to obtain the joint box device.
According to the technical solution provided by some embodiments of the present application, the joint box section includes a joint box body; the two ends of the joint box body along the first direction are opened; a first cavity and a second cavity are distributed in the joint box body along a second direction; the second direction is perpendicular to the first direction; the first chamber and the second chamber are communicated; one end of the first chamber, which is far away from the second chamber, is communicated with the outside; the first chamber is used for accommodating the HDPE membrane; and a lock joint fixing component which is used for being connected with the lock joint in an inserting mode is arranged in the second cavity.
According to the technical scheme provided by some embodiments of the application, the cross section of the joint box body is trapezoidal; the first chamber is arranged close to the short side of the trapezoid; the second chamber is arranged close to the long side of the trapezoid.
According to the technical scheme provided by some embodiments of the present application, a through seam through which the HDPE film can pass is formed on a side wall of the first chamber away from the second chamber; a first included angle is formed between the depth direction of the penetrating seam and the second direction; the range of the first included angle is 15-30 degrees.
According to the technical scheme provided by some embodiments of the application, a chamfer structure is adopted at the penetrating seam.
According to the technical scheme provided by certain embodiments of the application, a tensioning piece for tensioning the HDPE membrane is detachably arranged in the first chamber.
According to the technical scheme provided by some embodiments of the present application, the tensioning member is made of flexible material and has a cylindrical structure, and the extending direction of the tensioning member is parallel to the first direction.
According to the technical scheme provided by some embodiments of the application, the diameter of the tensioning piece is larger than 60mm.
According to the technical scheme provided by certain embodiments of the application, the tensioning piece is open at two ends and hollow inside.
According to the technical scheme provided by some embodiments of the application, the lock joint fixing assembly comprises a fixing frame; a fixed space is formed in the fixed frame; a fixing piece used for being coupled with the lock joint is detachably connected in the fixing space; one end of the fixed space is communicated with the first cavity, and the other end of the fixed space is connected with a box body back plate.
Compared with the prior art, the beneficial effect of this application: according to the construction method of the HDPE film composite flexible underground impervious wall, when segmented or sequential construction or technical construction interruption needs to be carried out, occupation protection can be carried out on the locking joint of the HDPE film at the end through the joint box device, the joint box device is pulled out after grooving is carried out on the outer side of the joint box device during subsequent construction, continuous and reliable locking connection of the HDPE film is achieved, the HDPE film and the locking joint thereof are not damaged in the process of descending and pulling the joint box device, and the construction method of the HDPE film composite flexible underground impervious wall enables construction of the HDPE film composite flexible underground impervious wall to be planned to be interrupted at any time, construction difficulty and organization management cost are greatly reduced, the integrity of connection of the HDPE film in the composite flexible underground impervious wall is guaranteed, and the seepage prevention performance of the HDPE film composite flexible underground impervious wall is improved.
According to some embodiments of the present application, the joint box device comprises a plurality of joint box sections, each joint box section comprises a joint box body with openings at two ends along a first direction, and a first cavity and a second cavity which are distributed in the joint box body along a second direction and are communicated with each other, the first cavity is communicated with the outside and can contain the HDPE membrane, and a locking joint fixing component capable of being inserted and locked with a joint is arranged in the second cavity; when the connector box device is used, the connector box device is firstly lifted to be positioned above a lock connector of an HDPE membrane to be protected, the first cavity is aligned with the HDPE membrane, and the second cavity is aligned with the lock connector; then, the joint box device is arranged in a construction groove of the HDPE membrane from top to bottom, so that the HDPE membrane is inserted into the first cavity, and a locking joint connected to the end part of the HDPE membrane is inserted into a locking joint fixing component in the second cavity; before subsequent construction, hoisting the joint box device from top to bottom from the construction groove, so that the HDPE membrane is gradually separated from the first cavity, and the locking joint connected to the end part of the HDPE membrane is gradually separated from the second cavity; this joint case device can realize in the compound flexible secret cut-off wall work progress of different wall thickness HDPE membrane, to HDPE diaphragm lock protection that connects when technical segmentation, branch preface construction or construction interrupt, HDPE diaphragm lock joint difficulty when avoiding follow-up construction has guaranteed efficiency of construction and quality.
Drawings
Fig. 1 is a schematic structural diagram of a joint box device (not spliced with a lock joint of a HDPE film) of a HDPE film composite flexible underground diaphragm wall provided by an embodiment of the application;
FIG. 2 is a schematic structural diagram of a joint box device (in plug-in connection with a lock joint of a HDPE film) of the HDPE film composite flexible underground diaphragm wall provided by the embodiment of the application;
fig. 3 is a schematic diagram of HDPE film composite flexible underground diaphragm wall construction provided by the embodiment of the application.
The text labels in the figures are represented as:
101. a HDPE membrane; 102. locking the joint;
2. a joint box body; 201. a first chamber; 202. a second chamber; 203. penetrating the seam; 204. a box body back plate;
3. a tensioning member;
401. a fixed mount; 402. a fixed space; 403. a fixing member; 404. an opening;
501. a constructed section; 502. and (5) constructing sections.
Detailed Description
The following detailed description of the present application is given for the purpose of enabling those skilled in the art to better understand the technical solutions of the present application, and the description in this section is only exemplary and explanatory, and should not be taken as limiting the scope of the present application in any way.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the construction process of the HDPE film composite flexible underground diaphragm wall with different wall thicknesses, technical segmentation or sequence construction or technical construction interruption is often required, and at the moment, in order to avoid difficult locking connection of HDPE films in subsequent construction, a locking joint connected with the end parts of the HDPE films in the constructed section needs to be protected.
The embodiment provides a construction method of an HDPE film composite flexible underground diaphragm wall, which needs to use a joint box device of the HDPE film composite flexible underground diaphragm wall shown in FIG. 1 for protecting a lock joint 102 connected with the end part of an HDPE membrane 101, wherein the joint box device comprises a plurality of joint box sections which are sequentially connected; the joint box sections have the same structure and comprise joint box bodies 2; the two ends of the joint box body 2 along the first direction are opened; a first chamber 201 and a second chamber 202 are distributed in the joint box body 2 along a second direction; the second direction is perpendicular to the first direction; the first chamber 201 and the second chamber 202 are in communication; one end of the first chamber 201 far away from the second chamber 202 is communicated with the outside; the first chamber 201 is used for accommodating the HDPE membrane 101; a locking connector fixing component for being connected with the locking connector 102 is arranged in the second chamber 202.
Specifically, the joint box body 2 is mainly formed by processing section steel and plate materials in a factory; the first direction is a direction perpendicular to a paper surface in fig. 1, the length direction of the joint box body 2 is the first direction, and two ends of the joint box body 2 in the first direction are open, in this embodiment, the cross section of the joint box body 2 is a quadrilateral structure, that is, the joint box body 2 includes four plate bodies connected end to end in sequence; the second direction is a horizontal direction in fig. 1, i.e., a left-right direction; a partition plate is arranged inside the joint box body 2; the partition plate divides the interior of the joint box body 2 into a first chamber 201 and a second chamber 202 along the second direction; the partition plate is provided with a communication port for communicating the first chamber 201 with the second chamber 202; the first chamber 201 is a chamber for placing the HDPE film 101, and the second chamber 202 is a chamber for protecting the locking joint 102.
In use, the joint box apparatus is first hoisted to be positioned over the lock joint of the HDPE membrane sheets to be protected, and the first chamber 201 is aligned with the HDPE membrane sheets 101 and the second chamber 202 is aligned with the lock joint 102; then, the joint box device is arranged into a construction groove of an HDPE membrane from top to bottom, so that the HDPE membrane 101 is inserted into the first chamber 201, the lock joint 102 connected to the end part of the HDPE membrane 101 is inserted into the lock joint fixing component in the second chamber 202, and fig. 2 is a structural schematic diagram of the installed joint box device; before the subsequent construction, the joint box device is lifted from the top to the bottom from the construction groove, so that the HDPE membrane 101 is gradually separated from the first chamber 201, and the locking joint 102 connected to the end part of the HDPE membrane 101 is gradually separated from the second chamber 202.
This joint case device can protect the lock joint of the HDPE diaphragm end connection of having constructed the section, and HDPE diaphragm lock joint difficulty when avoiding follow-up construction has guaranteed efficiency of construction and quality.
Preferably, the cross section of the joint box body 2 is trapezoidal; the first chamber 201 is arranged close to the short side of the trapezoid; the second chamber 202 is disposed near the long side of the trapezoid.
Specifically, in this embodiment, the cross section of the joint box body 2 is an isosceles trapezoid, and a plane where the cross section is located is perpendicular to the first direction and parallel to the second direction; the direction in which the height of the trapezoid lies is parallel to the second direction; the first chamber 201 is formed by enclosing a partition plate, a short side of a trapezoid and part of side edges; the second chamber 202 is formed by enclosing a partition plate, a long side of a trapezoid and the other part of side edge; when the ladder-shaped structure is used, the short side of the ladder-shaped structure is positioned on the side of the prior construction (namely, the constructed section), and the long side of the ladder-shaped structure is positioned on the side of the subsequent construction (namely, the non-constructed section). By adopting the technical scheme, the trapezoid cross section of the joint box body is in open contact with the preorder wall section, so that the joint box body can be conveniently pulled out from the preorder wall section after subsequent grooving.
Further, a through seam 203 for the HDPE film 101 to pass through is formed on the sidewall of the first chamber 201 away from the second chamber 202; a first included angle is formed between the depth direction of the through seam 203 and the second direction; the range of the first included angle is 15-30 degrees.
Specifically, the through slit 203 is a passage through which the first chamber 201 communicates with the outside, and has a length direction as the first direction and a depth direction as a direction indicated by an arrow in fig. 1; the penetrating seam 203 is positioned in the middle of the box body plate on the short side of the trapezoidal section of the joint box body 2; the box body plates on the short side of the trapezoidal section of the joint box body 2 are divided into two unconnected parts by the penetrating seams 203; by adopting the inclined through seam 203, after the HDPE film passes through the through seam 203, the plugging slurry filled in the front wall section can be effectively isolated.
Preferably, a chamfer structure is adopted at the position of the penetrating seam 203; through additional chamfer processing, greatly reduced joint box body and set up, played the damage of scraping of pulling out the in-process to the HDPE diaphragm and destroy the risk.
Further, a tensioning member 3 for tensioning the HDPE membrane 101 is detachably arranged in the first chamber 201.
Specifically, tensioning member 3 is cylindric structure, and its extending direction is on a parallel with first direction, its diameter is greater than 60mm, when using, will connect case box 2 to set up to the construction inslot after, will tensioning member 3 top-down inserts in the first cavity 201, and make it be located run through seam 203 annex department, through adjusting tensioning member 3's position with whole HDPE diaphragm tensioning, reserve the HDPE membrane volume of stretching out when playing the activity for follow-up joint case box.
Preferably, tensioning member 3 both ends opening and inside cavity, in this embodiment, it is the rubber tube that the diameter is greater than 60mm, when using, can be through pouring into the thick liquid that is difficult for solidifying from the top of rubber tube, and the thick liquid can flow out from the bottom of rubber tube to in flowing to first cavity and the second cavity, can carry out circulation washing replacement to the filler that probably permeates in first cavity and second cavity, and filler here refers to the thick liquid that pours into in construction inslot HDPE membrane both sides during preceding construction.
Further, the locking head fixing assembly comprises a fixing frame 401; a fixing space 402 is formed inside the fixing frame 401; a fixing part 403 for coupling with the locking connector 102 is detachably connected in the fixing space 402; one end of the fixed space 402 is communicated with the first chamber 201, and the other end is connected with a box body back plate 204.
Specifically, in this embodiment, the lock joint 102 includes a web plate and a wing plate integrally formed with the web plate, and one side 403 of the web plate is integrally provided with a connecting concave buckle, an inverted L-shaped lock head, a convex lock head and an end limiting piece in sequence; the convex round lock head is provided with a connecting part connected with the web plate and a cylindrical locking part with an arc notch, which is arranged at one end of the connecting part far away from the web plate; the arc notches are obliquely arranged at an angle of 45 degrees; the connecting concave buckle is provided with a cylindrical locking through groove, and a communication port communicated with the outside is formed in the groove wall of the locking through groove; the size of the communication opening is smaller than the diameter of the cross section of the locking through groove; the convex lock head can be matched and connected with the connecting concave buckle;
the fixing frame 401 is of an approximately inverted-V-shaped structure, the top of the fixing frame 401 is located at a communication port on the partition plate, an opening 404 is reserved at the top of the fixing frame 401, one end of the locking connector 102 is provided with a wing plate, the wing plate is welded and fixed with the HDPE membrane 101 through the wing plate, and the wing plate of the locking connector 102 can pass through the reserved opening 404; the fixing piece 403 is anchored on the side wall of the fixing frame 401 through a rivet and can be coupled with the lock joint 102, the structure of the fixing piece 403 is the same as that of the lock joint 102, and the fixing piece 403 also comprises a web plate, a wing plate integrally formed with the web plate, and a connecting concave buckle, an inverted L-shaped lock head, a convex round lock head and an end limiting sheet which are sequentially and integrally arranged on one side of the web plate; when the fixing member 403 is coupled with the locking connector 102, the convex lock, the connecting concave buckle, and the inverted L-shaped lock of the fixing member 403 are respectively coupled with the connecting concave buckle, the convex lock, and the inverted L-shaped lock of the locking connector 102.
In the construction method of the HDPE film composite flexible underground cut-off wall provided by the embodiment, by adopting the joint box device of the HDPE film composite flexible underground cut-off wall, the effective protection of the HDPE film composite flexible underground cut-off wall construction can be realized, the construction requirement of the HDPE membrane connection integrity in the high-standard cut-off barrier construction can be met, referring to fig. 3, the construction method of the HDPE film composite flexible underground cut-off wall specifically comprises the following steps:
s1, excavating Shi Gongcao, and determining a first preset position and a second preset position in a construction groove;
when the underground diaphragm wall is constructed, firstly, grooving operation of the underground diaphragm wall is required, namely, excavating and cleaning holes according to requirements to obtain a construction groove with a certain length for arranging the HDPE membrane below; secondly, a first preset position and a second preset position need to be determined in the construction groove, the first preset position is used for arranging the HDPE membrane downwards, and the second preset position is used for arranging the joint box device downwards.
S2, arranging an HDPE membrane of which the end part is welded with a locking joint to the first preset position;
the HDPE diaphragm all is equipped with the lock joint about, the HDPE diaphragm down set to behind the first preset position, the lock joint that is located the left end is pegged graft fixedly with the lock joint of preceding HDPE diaphragm right-hand member.
S3, arranging a joint box device to a second preset position, and inserting the joint box device with the lock joint;
before the joint box device is arranged below, each joint box section needs to be assembled, specifically, a plurality of joint box sections with proper number are selected according to the depth of Shi Gongcao, then all the joint box sections are sequentially spliced through a hoisting or special pulling tool, and the joint box bodies 2 of the adjacent joint box sections are connected through pins to obtain the assembled joint box device; when the slot hole is deeper, the assembly can be carried out under the orifice.
When the joint box device is arranged downwards, firstly, the joint box device is lifted to be positioned above a second preset position, namely above a lock joint of an installed HDPE membrane, and the first chamber 201 is aligned with the HDPE membrane 101, and the second chamber 202 is aligned with the lock joint 102; then from top to bottom will connect the case device to descend to the second preset position in Shi Gongcao of HDPE diaphragm for HDPE diaphragm 101 inserts through running through seam 203 and establishes in first cavity 201, connects the lock joint 102 of this HDPE diaphragm 101 tip and pegs graft mutually through opening 404 with the fixed subassembly of 403 lock joint in the second cavity 202, fixes it on the construction platform of construction groove notch when connecting the bottom of case device and establishing to the construction groove, and concrete fixed mode can be: erecting a mounting frame at the notch of the construction groove, and fixedly connecting the box body of the interface box with the mounting frame through screws and the like; and finally, arranging a tensioning piece 3 in the first chamber 201, tensioning the whole HDPE membrane by adjusting the position of the tensioning piece 3, and reserving the stretching amount of the HDPE membrane when the follow-up joint box device is pulled out.
S4, filling a filling material into the construction groove;
and (3) filling the two sides of the HDPE membrane in the construction groove with filling materials, replacing retaining wall slurry in a pre-arranged wall section in the construction groove, namely the constructed section 501, wherein in the filling and replacing process, the box body back plate 204 of the joint box device needs to be supported by an original place layer which is not excavated or other materials, so that deformation is avoided. To the right of the splice enclosure assembly in fig. 3 is an unfinished section 502 that can provide support for the enclosure back plate 204.
After filling material pours into the groove of being under construction into, it begins to solidify gradually, and in its in-process that solidifies, accessible first chamber 201 and tensioning piece 3, circulation mud wash clearance first chamber 201 filling material that probably permeates, the concrete mode is: grout that is difficult for solidifying (for filler material) is poured from the top of rubber tube, and the grout can flow out from the bottom of rubber tube to in flowing to first cavity and second cavity, can carry out circulation washing replacement to the filler that probably exists in first cavity and the second cavity, and filler here refers to when preorder construction the grout that HDPE membrane both sides were poured in the construction groove, and circulation washing accessible sets up the circulating pump in the construction groove notch and realizes.
And S5, taking the joint box device out of the second preset position before the filling material is solidified and the subsequent membrane is arranged below, and separating the lock joint from the joint box device and keeping the lock joint in a complete state.
After the filler material of the preceding construction section in Shi Gongcao is solidified, and when the subsequent slotted hole excavation on the right side of the box body back plate 204 of the joint box device is completed and the hole cleaning is nearly completed, taking out the joint box device from the second preset position, wherein the specific operation mode can be as follows: a crane or a special puller is adopted, the tensioning piece 3 is lifted and taken out from the first chamber, then the joint box body 2 is lifted and pulled out from the inside of the construction groove from top to bottom, so that the HDPE membrane 101 is separated from the first chamber 201 gradually, the locking joint 102 connected to the end part of the HDPE membrane 101 is separated from the second chamber 202 gradually, and after the joint box device is completely separated from the locking joint, the HDPE membrane and the locking joint are kept intact.
Next, repeat above-mentioned step, prepare the epilogue HDPE diaphragm, with its lower setting install in the epilogue wall section to make the lock joint of epilogue HDPE diaphragm left end and the lock joint plug-in connection of preorder HDPE diaphragm (the HDPE diaphragm that connects the case device protection before promptly) right-hand member. The circulation is carried out, and the continuity, the integrity and the integrity of the HDPE membrane continuous downward arrangement are realized through the joint box device.
The invention effectively solves the problems of sectional or sequential construction or technical construction interruption and effective and reliable connection of HDPE films in the construction process of the HDPE film composite flexible underground diaphragm wall, so that the construction of the HDPE film composite flexible underground diaphragm wall can be planned to be interrupted at any time, the construction difficulty and the organization management cost are greatly reduced, the continuous integrity of the HDPE film is ensured, and the anti-permeability performance of the HDPE film composite flexible underground diaphragm wall is improved, and the application of the invention has the following characteristics:
1. common section steel and plate materials are used as main structural materials of the joint box device, and the joint box device is easy to process and realize;
2. the joint box device sections are designed to be convenient to transport and use, and joint box devices with different lengths can be obtained by selecting different numbers of joint box sections and sequentially connecting the joint box sections, so that the construction requirements of HDPE film composite flexible underground impervious walls with different depths can be met;
3. the HDPE membrane adjusting bin (namely a first chamber) in the joint box device is arranged to reserve the stretching amount of the HDPE membrane to adapt to the displacement of the joint box device in the lifting process, so that the potential risk that the HDPE membrane is pulled and damaged in the lifting process of the joint box device is eliminated;
4. the design of the middle protection bin (namely a second chamber) and the locking joint fixing component of the joint box device meets the construction requirements of HDPE film composite flexible underground impervious walls in different material filling processes, and the fixing piece 403 has the same structure as the HDPE film locking joint and is anchored on the inner wall of the second chamber, so that the insertion type engagement locking connection can be realized, and the complete protection of the locking joint locking hook is formed;
5. the arrangement and use of the adjusting rubber tube (namely a tensioning piece) and the locking joint fixing component can adjust the stretching amount of the reserved HDPE film and protect the integrity of the locking hook of the locking joint, thereby realizing the continuous integrity of the HDPE film; meanwhile, the adjusting rubber tube can be used as a circulating rubber tube to realize the cleaning and replacement of the fillers in the first cavity and the second cavity;
6. gaps with angles are reserved on the trapezoidal short sides of the joint box body, so that slurry can be effectively isolated and blocked, and meanwhile, chamfering treatment is added, so that the risk of scraping damage to the HDPE membrane in the processes of setting and pulling up the lower part of the joint box device is greatly reduced; the whole design is trapezoidal, and the follow-up slotting is pulled out and is separated smoothly.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are no specific structures which are objectively limitless due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the technical features mentioned above can be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention in other instances, which may or may not be practiced, are intended to be within the scope of the present application.
Claims (10)
1. The construction method of the HDPE film composite flexible underground diaphragm wall is characterized by comprising the following steps:
s1, excavating Shi Gongcao, and determining a first preset position and a second preset position in a construction groove;
s2, arranging an HDPE membrane of which the end part is welded with a locking joint to the first preset position;
s3, arranging a joint box device below the second preset position, and inserting the joint box device with the lock joint;
s4, filling a filling material into the construction groove;
and S5, taking the joint box device out of the second preset position before the filling material is solidified and the subsequent membrane is arranged below, and separating the lock joint from the joint box device and keeping the lock joint in a complete state.
2. The construction method of the HDPE film composite flexible underground diaphragm wall of claim 1, wherein in step S3, before the joint box device is arranged below the second preset position, a plurality of joint box sections with proper number are selected according to the depth of Shi Gongcao, and all the joint box sections are sequentially spliced and installed to obtain the joint box device.
3. The method for constructing an HDPE film composite flexible underground diaphragm wall as claimed in claim 2, characterized in that the joint box section comprises a joint box body (2); the two ends of the joint box body (2) are opened along a first direction; a first chamber (201) and a second chamber (202) are distributed in the joint box body (2) along a second direction; the second direction is perpendicular to the first direction; the first chamber (201) and the second chamber (202) are in communication; one end of the first chamber (201) far away from the second chamber (202) is communicated with the outside; the first chamber (201) is used for accommodating the HDPE membrane (101); a lock joint fixing component used for being connected with the lock joint (102) in an inserting mode is arranged in the second chamber (202).
4. The construction method of the HDPE film composite flexible underground diaphragm wall, which is characterized in that the cross section of the joint box body (2) is trapezoidal; the first chamber (201) is arranged close to the short side of the trapezoid; the second chamber (202) is arranged close to the long side of the trapezoid.
5. The construction method of the HDPE film composite flexible underground diaphragm wall as claimed in claim 3, wherein the side wall of the first chamber (201) far away from the second chamber (202) is provided with a through seam (203) for the HDPE film (101) to pass through; a first included angle is formed between the penetrating seam (203) and the second direction; the range of the first included angle is 15-30 degrees.
6. The construction method of HDPE membrane composite flexible underground diaphragm wall in claim 3, characterized in that a chamfer structure is adopted at the penetrating seam (203).
7. The method for constructing the HDPE film composite flexible underground diaphragm wall according to the claim 3, wherein a tensioning member (3) for tensioning the HDPE film (101) is detachably arranged in the first chamber (201).
8. The method for constructing an HDPE (high-density polyethylene) membrane composite flexible underground diaphragm wall according to claim 7, wherein the tensioning member (3) is made of flexible material and has a cylindrical structure, and the extending direction of the cylindrical structure is parallel to the first direction.
9. The method for constructing HDPE membrane composite flexible underground diaphragm wall according to claim 7, characterized in that the tension member (3) is open at both ends and hollow inside.
10. The method for constructing an HDPE film composite flexible underground diaphragm wall according to claim 3, wherein the locking joint fixing component comprises a fixing frame (401); a fixed space (402) is formed inside the fixed frame (401); a fixing piece (403) used for being coupled with the lock joint (102) is detachably connected in the fixing space (402); one end of the fixed space (402) is communicated with the first chamber (201), and the other end of the fixed space is connected with a box body back plate (204).
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| CN202211259278.1A CN115559339A (en) | 2022-10-14 | 2022-10-14 | Construction method of HDPE (high-density polyethylene) film composite flexible underground diaphragm wall |
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| CN202211259278.1A CN115559339A (en) | 2022-10-14 | 2022-10-14 | Construction method of HDPE (high-density polyethylene) film composite flexible underground diaphragm wall |
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