CN115419050A - Embedded sleeve combined underground continuous wall and construction method thereof - Google Patents
Embedded sleeve combined underground continuous wall and construction method thereof Download PDFInfo
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- CN115419050A CN115419050A CN202210937664.5A CN202210937664A CN115419050A CN 115419050 A CN115419050 A CN 115419050A CN 202210937664 A CN202210937664 A CN 202210937664A CN 115419050 A CN115419050 A CN 115419050A
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000011440 grout Substances 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims description 44
- 230000037431 insertion Effects 0.000 claims description 44
- 238000007789 sealing Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 12
- 238000010008 shearing Methods 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000007569 slipcasting Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 14
- 239000004744 fabric Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000002411 adverse Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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- E—FIXED CONSTRUCTIONS
- 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
- E02D19/185—Joints between sheets constituting the sealing aprons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention discloses an embedded sleeve combined underground continuous wall and a construction method thereof, and aims to provide an embedded sleeve combined underground continuous wall and a construction method thereof, wherein the embedded sleeve combined underground continuous wall has the advantages of high connection strength, good integrity and convenience in construction, can improve construction efficiency and can meet the requirements of bending resistance and shearing resistance of a wall body. The pre-buried sleeve combination formula underground continuous wall includes: prefabricating a wall body on the lower part; prefabricating a wall body on the upper part; vertical connected system, vertical connected system includes muffjoint device, muffjoint device is including burying the upper sleeve in the prefabricated wall body bottom in the upper panel in advance, pre-buried lower anchor rod of establishing at prefabricated wall body top in the lower panel, set up the slip casting passageway in prefabricated wall body bottom in the upper panel and set up the excessive thick liquid passageway in prefabricated wall body bottom in the upper panel, the upper portion of anchor rod is down inserted and is established in the upper sleeve, the slip casting passageway is used for pouring into high strength grout material into the upper sleeve, the clearance between upper sleeve and the lower anchor rod is filled through high strength grout material.
Description
Technical Field
The invention relates to an underground continuous wall, in particular to an embedded sleeve combined type underground continuous wall and a construction method thereof.
Background
The underground continuous wall is widely applied to soft soil foundation pit enclosure engineering due to the advantages of large integral rigidity, good water stopping effect and the like. The traditional cast-in-place underground continuous wall has the influences of long construction time, underwater concrete pouring and other factors, and is easy to cause the problems that underwater concrete clamping mud, concrete blocking pipes, wall breakage, joint mud clamping, leakage, embedded rib position are difficult to control and the like, and the adverse effect is caused to the engineering. The process for prefabricating the underground diaphragm wall can better solve the problems, and simultaneously has the advantages of high strength, industrial manufacture, high construction efficiency, construction site saving, environmental protection and the like.
The prefabricated underground continuous wall is influenced by traffic transportation control, the single-width length of the prefabricated underground continuous wall is often limited, the actual excavation depth is deep, and the single-width wall is difficult to meet the design requirement. Therefore, the multiple continuous walls need to be vertically connected from top to bottom so as to meet the design requirement of wall depth. In the installation process of the underground continuous walls, the strength and the impermeability of the connection nodes between the underground continuous walls are key factors needing to be controlled. At present, the vertical connecting structures between the upper prefabricated wall body and the lower prefabricated wall body are usually connected through concrete pouring, welding and other modes. The method has the problems of complex construction process, low construction efficiency, site environment pollution easily caused by concrete pouring, incapability of ensuring the bending resistance of the connecting joint and the like.
Disclosure of Invention
The invention aims to provide an embedded sleeve combined underground continuous wall and a construction method thereof, wherein the embedded sleeve combined underground continuous wall has high connection strength, good integrity and convenient construction, can improve the construction efficiency and can meet the requirements of bending resistance and shearing resistance of a wall body.
The technical scheme of the invention is as follows:
an embedded sleeve combined underground continuous wall, comprising:
prefabricating a wall body on the lower wall;
prefabricating a wall body on the upper panel;
the vertical connecting system is used for connecting the lower prefabricated wall body and the upper prefabricated wall body, the vertical connecting system comprises a sleeve connecting device, the sleeve connecting device comprises an upper sleeve which is pre-embedded at the bottom of the upper prefabricated wall body, a lower anchor bar which is pre-embedded at the top of the lower prefabricated wall body, a grouting channel which is arranged at the bottom of the upper prefabricated wall body and an overflow channel which is arranged at the bottom of the upper prefabricated wall body, the lower end of the upper sleeve is communicated with the lower end face of the upper prefabricated wall body, the upper portion of the lower anchor bar extends out of the upper portion of the lower prefabricated wall body, the upper portion of the lower anchor bar is inserted into the upper sleeve, one end of the overflow channel is communicated with the outer side face of the upper prefabricated wall body, the other end of the overflow channel is communicated with the upper portion of the upper sleeve, one end of the grouting channel is communicated with the outer side face of the upper prefabricated wall body, the other end of the grouting channel is communicated with the lower portion of the upper sleeve, the grouting channel is used for injecting high-strength grouting material into the upper sleeve, a gap between the upper sleeve and the lower anchor bar is filled with the prefabricated wall body. The utility model provides a sleeve connecting device of pre-buried sleeve combination formula underground continuous wall, its upper portion that adopts down the anchorage bar pole is inserted and is established in last sleeve to through the gap that the grout material that excels in filled between sleeve and the lower anchorage bar pole leads to, realize the status to prefabricated wall body of lower panel and the prefabricated wall body of upper panel, and with prefabricated wall body of lower panel and the prefabricated wall body of upper panel even as an organic whole. Meanwhile, the high-strength grouting material is used for filling the gap between the lower end face of the upper prefabricated wall body and the upper end face of the lower prefabricated wall body, so that the integrity of the prefabricated underground continuous wall and the strength of the connecting part of the upper prefabricated wall body and the lower prefabricated wall body can be further improved; the water stopping performance of the connecting part between the upper prefabricated wall body and the lower prefabricated wall body can be improved, and the requirements of seepage prevention and water stopping are met. Therefore the embedded sleeve combination formula underground continuous wall of this scheme's joint strength is high, the wholeness is good, the construction is convenient, can improve the efficiency of construction, can satisfy the wall body bending resistance again and the requirement that shears.
Preferably, the vertical connecting system further comprises a screw locking device, the screw locking device comprises a pre-embedded lower screw locking assembly and a pre-embedded upper screw locking assembly, the pre-embedded upper screw locking assembly is pre-embedded in the lower end face of the upper prefabricated wall body, the pre-embedded upper screw locking assembly comprises an inserting rod, and the lower end of the inserting rod is provided with a clamping joint;
the embedded lower screw lock assembly comprises a lower fixed cylinder embedded in advance on the upper end face of the lower prefabricated wall body, a limiting cylinder fixedly arranged in the lower fixed cylinder, and a clamping ring and a lower spring arranged in the lower fixed cylinder, the lower end of the lower fixed cylinder is sealed, the upper end of the lower fixed cylinder is open, an inner hole of the limiting cylinder is formed into a limiting insertion hole matched with the insertion rod, the lower end of the limiting insertion hole is a clamping ring guide cavity with the inner diameter gradually increased from top to bottom, the clamping ring supports against the inner wall of the clamping ring guide cavity under the action of the lower spring, the insertion rod is inserted into the limiting insertion hole, and the clamping ring clamps the clamping head to prevent the insertion rod from moving upwards.
The screw locking device can be matched with the sleeve connecting device to connect the lower prefabricated wall body and the upper prefabricated wall body into a whole, specifically, the lower prefabricated wall body is well installed, when the upper prefabricated wall body is hoisted, the inserting rod of the pre-embedded upper screw locking assembly pre-embedded on the upper prefabricated wall body is inserted into the limiting inserting hole in the limiting cylinder pre-embedded on the lower prefabricated wall body, and thus, the requirements of bending resistance and shearing resistance of the wall body are further improved; simultaneously, block the joint through the snap ring to prevent the inserted link up to remove, thereby realize linking as an organic whole with prefabricated wall body in lower panel and prefabricated wall body in upper panel, further guarantee the joint strength and the wholeness that prefabricated wall body in lower panel and prefabricated wall body in upper panel link, simultaneously, its construction is convenient, can improve the efficiency of construction, can satisfy wall body bending resistance and shearing requirement again. In addition, the two connection modes of the screw locking device and the sleeve connection device are matched, so that the defects of the two modes can be effectively overcome, the connection strength and reliability are obviously improved, and the problem that the connection part of the underground diaphragm wall is broken due to the failure of one connection mode, and the adverse effect on the engineering is caused can be avoided.
Preferably, the embedded upper screw lock assembly further comprises an upper guide cylinder embedded on the lower end face of the upper prefabricated wall in advance, a sliding column sliding along the upper guide cylinder and an upper spring located above the sliding column, the upper end and the lower end of the upper guide cylinder are closed, an inserting rod through hole is formed in the lower end of the upper guide cylinder, the sliding column abuts against the lower end of the upper guide cylinder under the action of the upper spring, and the inserting rod is fixedly arranged at the lower end of the sliding column. Because the weight of the prefabricated wall body of the upper part of the drawing is big, the inserted link is located the prefabricated wall tongue-and-groove of the upper part of the drawing, at the in-process of hoist and mount prefabricated wall body of the drawing, the operator is difficult to the embedded inserted link of the screw lock subassembly of going up of effectual observation for the embedded inserted link of going up the screw lock subassembly is adjusted the operation degree of difficulty with the embedded spacing spliced eye of screw lock subassembly down and is adjusted the great degree of difficulty. Appear easily in the actual operation in-process because of inserted bar and spacing spliced eye are not adjusted well for the inserted bar of screw lock subassembly supports on the top surface of prefabricated wall tenon of next width of cloth in advance on pre-buried, and leads to pre-buried screw lock subassembly to be destroyed. In order to solve this problem, this scheme improves the spiral shell lock subassembly on pre-buried, and the in-process of the prefabricated wall body of width of cloth on the hoist and mount if not adjusting well with spacing spliced eye according to the inserted link for when the inserted link of spiral shell lock subassembly supports the top surface at the prefabricated wall tenon of width of cloth down in the pre-buried, the effort of going up the spring will be overcome to the slip post, makes inserted link and slip post up move to the guide cylinder in, thereby avoid the pre-buried problem of spiral shell lock subassembly destroyed.
Preferably, a lower prefabricated wall tenon is arranged in the middle of the upper end face of the lower prefabricated wall body, an upper prefabricated wall mortise is arranged in the middle of the lower end face of the upper prefabricated wall body, the lower prefabricated wall tenon is arranged in the upper prefabricated wall mortise, the lower end of the upper sleeve is communicated with the upper prefabricated wall mortise, and the upper part of the lower anchor bar rod penetrates through the lower prefabricated wall tenon from bottom to top and is positioned above the lower prefabricated wall tenon; and a plurality of screw locking devices are distributed on two opposite sides of the lower prefabricated wall tenon. The mortises of the upper prefabricated wall and the mortises of the lower prefabricated wall can be connected in an occlusion manner, so that the horizontal relative displacement resistance capability of the underground continuous wall is effectively improved. On the other hand, through the reasonable layout of the tenon of the lower prefabricated wall, the mortise of the upper prefabricated wall, the sleeve connecting device and the screw locking device, the connection strength and the integrity of the lower prefabricated wall and the upper prefabricated wall can be effectively improved under the condition that the lower prefabricated wall, the mortise of the upper prefabricated wall, the sleeve connecting device and the screw locking device are not influenced mutually.
Preferably, the vertical connecting system further comprises a bent bolt connecting device, the bent bolt connecting device comprises a bent bolt, a bent bolt lower channel arranged at the upper part of the lower prefabricated wall body and a bent bolt upper channel arranged at the lower part of the upper prefabricated wall body, the upper end of the bent bolt lower channel is communicated with the upper end face of the lower prefabricated wall body, the lower end of the bent bolt lower channel is communicated with the outer side face of the lower prefabricated wall body, the lower end of the bent bolt upper channel is communicated with the lower end face of the upper prefabricated wall body, the upper end of the bent bolt upper channel is communicated with the outer side face of the upper prefabricated wall body, and the bent bolt penetrates through the bent bolt lower channel and the bent bolt upper channel and connects the lower prefabricated wall body and the upper prefabricated wall body into a whole.
The bent bolt connecting device can be matched with a sleeve connecting device to connect the lower prefabricated wall body and the upper prefabricated wall body into a whole, specifically, the lower prefabricated wall body is well installed, and when the upper prefabricated wall body is hoisted, a lower anchor bar rod on the lower prefabricated wall body is inserted into an upper sleeve on the upper prefabricated wall body; then, the lower prefabricated wall body and the upper prefabricated wall body are connected into a whole through the bent bolts, the connection strength and integrity of the lower prefabricated wall body and the upper prefabricated wall body are further guaranteed, meanwhile, the construction is convenient and fast, the construction efficiency can be improved, and the requirements of bending resistance and shearing resistance of the wall body can be met. In addition, the screw locking device and the bent bolt connecting device are matched in two connecting modes, so that the defects of the two modes can be effectively overcome, the connecting strength and reliability are obviously improved, and the problem that the connecting part of the underground diaphragm wall is broken due to the failure of one connecting mode, and the engineering is adversely affected can be avoided.
Preferably, a lower prefabricated wall tenon is arranged in the middle of the upper end face of the lower prefabricated wall body, an upper prefabricated wall mortise is arranged in the middle of the lower end face of the upper prefabricated wall body, the lower prefabricated wall tenon is arranged in the upper prefabricated wall mortise, the lower end of the upper sleeve is communicated with the upper prefabricated wall mortise, and the upper part of the lower anchor bar rod penetrates through the lower prefabricated wall tenon from bottom to top and is positioned above the lower prefabricated wall tenon; a plurality of bent bolt connecting devices are uniformly distributed on two opposite sides of the lower prefabricated wall tenon. The mortises of the upper prefabricated wall and the mortises of the lower prefabricated wall can be connected in an occlusion manner, so that the horizontal relative displacement resistance capability of the underground continuous wall is effectively improved. On the other hand, through the reasonable layout of the tenon of the lower prefabricated wall, the mortise of the upper prefabricated wall, the sleeve connecting device and the bent bolt connecting device, the connection strength and the integrity of the lower prefabricated wall and the upper prefabricated wall can be effectively improved under the condition that the lower prefabricated wall, the mortise of the upper prefabricated wall, the sleeve connecting device and the bent bolt connecting device are not influenced mutually.
Preferably, the middle of the upper end face of the lower prefabricated wall body is provided with a tenon of the lower prefabricated wall body, and the middle of the lower end face of the upper prefabricated wall body is provided with a mortise of the upper prefabricated wall body. The mortises of the upper prefabricated wall and the mortises of the lower prefabricated wall can be connected in an occlusion manner, so that the horizontal relative displacement resistance capability of the underground continuous wall is effectively improved.
Preferably, the sleeve connecting device comprises an upper anchor rod pre-embedded at the bottom of the upper prefabricated wall body, the lower part of the upper anchor rod is provided with an upper port of an upper sleeve inserted into the upper sleeve, and a gap between the upper sleeve and the upper anchor rod is filled with high-strength grouting material. So, can improve the steadiness of upper sleeve in the prefabricated wall body of upper panel.
Preferably, the upper anchor bar is a pre-stressed anchor bar, and the lower anchor bar is also a pre-stressed anchor bar.
Preferably, an annular sealing rubber strip is arranged between the lower end face of the upper prefabricated wall body and the upper end face of the lower prefabricated wall body, and the annular sealing rubber strip extends along the edge of the upper end face of the upper prefabricated wall body. The setting of annular joint strip can avoid the grouting material seepage flow that excels in.
A construction method of an embedded sleeve combined underground continuous wall is characterized by sequentially comprising the following steps:
constructing a cement soil underground continuous wall;
pressing the lower prefabricated wall body into the cement-soil underground continuous wall along the vertical direction until the upper end face of the lower prefabricated wall body is h meters higher than the ground surface;
hoisting the upper prefabricated wall body, hoisting the upper prefabricated wall body to be right above the lower prefabricated wall body, then slowly descending the upper prefabricated wall body to a set height, and then adjusting the position of the upper prefabricated wall body to align an upper sleeve on the upper prefabricated wall body with a lower anchor bar rod on the lower prefabricated wall body; aligning the plug-in connection rod on the upper prefabricated wall body with the limiting plug-in connection hole on the lower prefabricated wall body; then, slowly descending the upper prefabricated wall body, inserting the lower anchor bar rod on the lower prefabricated wall body into the upper sleeve on the upper prefabricated wall body, inserting the insertion rod on the upper prefabricated wall body into the limiting insertion hole on the lower prefabricated wall body, and clamping the clamping joint by the clamping ring to prevent the insertion rod from moving upwards;
installing a bent bolt connecting device, enabling a bent bolt to penetrate through a lower bent bolt channel and an upper bent bolt channel, then locking a nut on the bent bolt, and connecting the lower prefabricated wall body and the upper prefabricated wall body into a whole;
injecting high-strength grouting material into the upper sleeve through the grouting channel, so that the high-strength grouting material is injected into a gap between the lower end face of the upper prefabricated wall and the upper end face of the lower prefabricated wall, a lower bent bolt channel, an upper bent bolt channel and the upper sleeve through the upper sleeve;
then, sealing the peripheral edges of the gap between the upper prefabricated wall body and the lower prefabricated wall body through sealant;
and (VI) continuously pressing the upper prefabricated wall body and the lower prefabricated wall body into the cement-soil underground continuous wall.
The invention has the beneficial effects that: the wall body anti-bending and anti-shearing device has the characteristics of high connection strength, good integrity and convenience in construction, and can improve the construction efficiency and meet the requirements of bending resistance and shearing resistance of the wall body.
Drawings
Fig. 1 is a schematic partial structural view of an embedded sleeve combined underground continuous wall after an upper prefabricated wall body and a lower prefabricated wall body are assembled according to a first embodiment of the present invention.
Fig. 2 is a partial structural schematic view of an embedded sleeve combined underground continuous wall according to a first embodiment of the present invention, before the prefabricated wall bodies on the upper and lower panels are assembled.
Fig. 3 is a partial structural schematic view of a pre-buried lower screw lock component and a pre-buried upper screw lock component of a screw lock device of a pre-buried sleeve combined underground continuous wall according to a first embodiment of the present invention before assembly.
Fig. 4 is a partially enlarged view of a point a in fig. 1.
Fig. 5 is a partial structural schematic view of an embedded sleeve combined underground continuous wall according to a second embodiment of the present invention after the prefabricated wall bodies on the upper and lower panels are assembled.
Fig. 6 is a partial structural schematic view of an embedded sleeve combined underground continuous wall according to a second embodiment of the present invention, before the prefabricated wall bodies on the upper and lower panels are assembled.
In the figure:
the wall body 1 is prefabricated in the lower part, and the wall tenon 1.1 is prefabricated in the lower part;
an upper prefabricated wall body 2 and an upper prefabricated wall mortise 2.1;
the grouting device comprises a sleeve connecting device 3, an upper sleeve 3.1, a lower anchor rod 3.2, a grouting channel 3.3, a slurry overflow channel 3.4 and an upper anchor rod 3.5;
the device comprises a screw locking device 4, an embedded upper screw locking assembly 4.0a, an embedded lower screw locking assembly 4.0b, an upper guide cylinder 4.1, an insertion rod 4.2, a clamping joint 4.3, a lower fixing cylinder 4.4, a lower spring 4.5, a limiting cylinder 4.6, a clamping ring 4.7, an annular pressing sheet 4.8, an upper prestressed anchor rib 4.9, a lower prestressed anchor rib 4.10, an annular clamping groove 4.11, a sliding column 4.12, an upper spring 4.13, a limiting insertion hole 4.14, a clamping ring guide cavity 4.15, an embedded pipe 4.16 and a rubber sealing plug 4.17;
an annular sealing rubber strip 5.
The device comprises a bent bolt connecting device 6, a bent bolt 6.1, a bent bolt lower channel 6.2 and a bent bolt upper channel 6.3.
Detailed Description
In a first specific embodiment, as shown in fig. 1 and 2, a pre-buried sleeve combined underground continuous wall includes a lower prefabricated wall 1, an upper prefabricated wall 2 and a vertical connection system. The upper prefabricated wall body is a solid prefabricated underground continuous wall or a hollow prefabricated underground continuous wall. The lower prefabricated wall body is a solid prefabricated underground continuous wall or a hollow prefabricated underground continuous wall. All be provided with the steel reinforcement cage in the prefabricated wall body of upper panel and the prefabricated wall body of lower panel, the steel reinforcement cage includes vertical muscle and horizontal muscle.
The vertical connecting system is used for connecting the lower prefabricated wall body and the upper prefabricated wall body. The vertical connection system comprises a sleeve connection 3. The sleeve connecting device comprises an upper sleeve 3.1 pre-embedded at the bottom of the upper prefabricated wall body, a lower anchor rod 3.2 pre-embedded at the top of the lower prefabricated wall body, a grouting channel 3.3 arranged at the bottom of the upper prefabricated wall body and a grout overflowing channel 3.4 arranged at the bottom of the upper prefabricated wall body. The lower end of the upper sleeve is communicated with the lower end face of the upper prefabricated wall body. In this embodiment, the upper sleeve is vertically distributed. The upper part of the lower anchor bar rod extends out of the upper part of the lower prefabricated wall body. This embodiment, lower tendon pole is vertical distribution. The upper part of the lower anchor bar rod is inserted in the upper sleeve. One end of the slurry overflow channel is communicated with the outer side surface of the upper prefabricated wall body, and the other end of the slurry overflow channel is communicated with the upper portion of the upper sleeve. One end of the grouting channel is communicated with the outer side face of the upper prefabricated wall body, and the other end of the grouting channel is communicated with the lower portion of the upper sleeve. The slip casting passageway is used for pouring into the upper sleeve with the grout material that excels in. The gap between the upper sleeve and the lower anchor rod is filled with high-strength grouting material. And a gap between the lower end face of the upper prefabricated wall body and the upper end face of the lower prefabricated wall body is filled with high-strength grouting material. During actual construction, high-strength grouting material is injected into the upper sleeve through the grouting channel, so that the high-strength grouting material is injected into a gap between the lower end face of the upper prefabricated wall and the upper end face of the lower prefabricated wall and the upper sleeve through the upper sleeve, a gap between the upper sleeve and the lower anchor rod is filled with the high-strength grouting material, and a gap between the lower end face of the upper prefabricated wall and the upper end face of the lower prefabricated wall is filled with the high-strength grouting material.
The sleeve connecting device of the embedded sleeve combined underground continuous wall adopts the structure that the upper parts of the lower anchor bars are inserted into the upper sleeve, and the gap between the upper sleeve and the lower anchor bars is filled with high-strength grouting material, so that the positions of the lower prefabricated wall body and the upper prefabricated wall body are realized, and the lower prefabricated wall body and the upper prefabricated wall body are connected into a whole. Meanwhile, the high-strength grouting material is used for filling a gap between the lower end face of the upper prefabricated wall body and the upper end face of the lower prefabricated wall body, so that the integrity of the prefabricated underground continuous wall and the strength of the connecting part of the upper prefabricated wall body and the lower prefabricated wall body can be further improved; the water stopping performance of the connecting part between the upper prefabricated wall body and the lower prefabricated wall body can be improved, and the requirements of seepage prevention and water stopping are met. Therefore the embedded sleeve combination formula underground continuous wall of this scheme's joint strength is high, the wholeness is good, the construction is convenient, can improve the efficiency of construction, can satisfy the wall body bending resistance again and the requirement that shears.
Further, as shown in fig. 1 and 2, the sleeve connection device comprises an upper anchor bar 3.5 pre-embedded at the bottom of the upper prefabricated wall body, an upper port of an upper sleeve is arranged at the lower part of the upper anchor bar and inserted into the upper sleeve, and a gap between the upper sleeve and the upper anchor bar is filled with high-strength grouting material. In this embodiment, go up the anchor bar pole and be vertical distribution. So, can improve the steadiness of upper sleeve in the prefabricated wall body of upper panel.
The upper anchor bar is a prestressed anchor bar, and the lower anchor bar is also a prestressed anchor bar.
Further, as shown in fig. 1 and 2, an annular sealing rubber strip 5 is arranged between the lower end surface of the upper prefabricated wall body and the upper end surface of the lower prefabricated wall body, and the annular sealing rubber strip extends along the edge of the upper end surface of the upper prefabricated wall body. The sleeve connecting device is positioned on the inner side of the annular sealing rubber strip. The arrangement of the annular sealing rubber strips can avoid seepage of high-strength grouting materials, so that the water stopping performance of the connecting part between the upper prefabricated wall body and the lower prefabricated wall body is improved, and the requirements of seepage prevention and water stopping are met.
Further, as shown in fig. 1 and 2, a lower prefabricated wall tenon 1.1 is arranged in the middle of the upper end face of the lower prefabricated wall body, an upper prefabricated wall mortise 1.2 is arranged in the middle of the lower end face of the upper prefabricated wall body, and the lower prefabricated wall tenon is arranged in the upper prefabricated wall mortise. The mortises of the upper prefabricated wall and the mortises of the lower prefabricated wall can be connected in an occlusion manner, so that the horizontal relative displacement resistance capability of the underground continuous wall is effectively improved. In this embodiment, the cross section of lower width of cloth prefabricated wall tenon is rectangle or trapezoidal, and the cross section of upper width of cloth prefabricated wall tongue-and-groove is the rectangle or trapezoidal correspondingly.
Further, as shown in fig. 1, 2, 3 and 4, the vertical connection system further includes a screw locking device 4. The screw locking device 4 comprises a lower pre-embedded screw locking component 4.0b and an upper pre-embedded screw locking component 4.0a. The screw lock subassembly is buried underground in advance on the lower terminal surface of upper panel prefabricated wall body in advance, and the screw lock subassembly includes spliced pole 4.2 in advance, and in this embodiment, the spliced pole is vertical distribution. The lower end of the inserting rod is provided with a clamping joint 4.3. The pre-buried lower screw lock component comprises a lower fixing barrel 4.4 pre-buried on the upper end face of the lower prefabricated wall body, a limiting barrel 4.6 fixedly arranged in the lower fixing barrel, and a snap ring 4.7 and a lower spring 4.5 arranged in the lower fixing barrel. In this embodiment, the lower fixed cylinder is vertically distributed. The lower end of the lower fixed cylinder is closed, and the upper end of the lower fixed cylinder is opened. The inner hole of the limiting cylinder forms a limiting plug hole 4.14 matched with the plug rod, and the limiting plug hole is vertically distributed. The lower end of the limiting insertion hole is a snap ring guide cavity 4.15 with the inner diameter gradually increasing from top to bottom. The snap ring moves upwards under the action of the lower spring and abuts against the inner wall of the snap ring guide cavity. The inserting rod is inserted in the limiting inserting hole. The snap ring clamps the snap joint to prevent the plug rod from moving upwards.
The screw locking device of the embodiment can be matched with the sleeve connecting device to connect the lower prefabricated wall body and the upper prefabricated wall body into a whole, specifically, the lower prefabricated wall body is well installed, when the upper prefabricated wall body is hoisted, the lower anchor bar rod on the lower prefabricated wall body is inserted into the upper sleeve on the upper prefabricated wall body, and the inserting rod of the pre-embedded upper screw locking assembly pre-embedded on the upper prefabricated wall body is inserted into the limiting inserting hole in the limiting sleeve pre-embedded on the lower prefabricated wall body, so that the bending resistance and shearing resistance requirements of the wall body are further improved; simultaneously, block the joint through the snap ring to prevent the inserted link up to remove, thereby realize linking as an organic whole with prefabricated wall body in the upper panel with prefabricated wall body in the lower panel, further guarantee the joint strength and the wholeness that prefabricated wall body in the lower panel and prefabricated wall body in the upper panel are even, simultaneously, its construction is convenient, can improve the efficiency of construction, can satisfy wall body bending resistance and shearing requirement again. In addition, the two connection modes of the screw locking device and the sleeve connection device are matched, so that the defects of the two modes can be effectively overcome, the connection strength and reliability are obviously improved, and the problem that the connection part of the underground diaphragm wall is broken due to the failure of one connection mode, and the adverse effect on the engineering is caused can be avoided.
Specifically, the snap ring 4.7 comprises a plurality of clamping blocks with the same shape and size, and the clamping blocks are uniformly distributed along the axial direction of the limiting cylinder and surround to form the snap ring. The number of the clamping blocks is 2 blocks, 3 blocks, 4 blocks, 5 blocks or more, in the embodiment, the number of the clamping blocks is 3. The outer wall of the clamping block is matched with the inner wall of the clamping ring guide cavity. The inner wall of the clamping block is provided with clamping teeth for improving the friction force between the clamping block and the clamping head. In this embodiment, pre-buried spiral shell lock subassembly still includes annular preforming 4.8 down, and the annular preforming is located between spring and the snap ring down. The lower end of the lower spring is propped against the lower end of the lower fixed cylinder, and the upper end of the lower spring is propped against the annular pressing sheet. The annular pressing sheet upwards supports the clamping ring to press on the inner wall of the clamping ring guide cavity under the action of the lower spring.
The bayonet joint can pass spacing spliced eye. The outer diameter of the clamping head is increased from bottom to top and then reduced. The lower extreme of inserted bar and joint junction form be used for with snap ring complex annular joint groove 4.11. The inner wall of the annular clamping groove is conical, and the outer diameter of the inner wall of the annular clamping groove is gradually reduced from bottom to top. So, at the in-process of hoist and mount prefabricated wall body of upper panel, be favorable to the peg graft pole to insert spacing spliced eye to make the snap ring block joint, in order to prevent the peg graft pole upwards to move.
In the process of hoisting the upper prefabricated wall body, the insertion rod is downwards inserted into the limiting insertion hole. When the clamping ring is matched with the annular clamping groove, each clamping block of the clamping ring moves upwards along the inner wall of the clamping ring guide cavity under the action of the lower spring, and each clamping block of the clamping ring abuts against the inner wall of the annular clamping groove; thereby the snap ring is used for clamping the bayonet joint to prevent the plug rod from moving upwards.
Further, as shown in fig. 1 and 2, the lower end of the upper sleeve 3.1 is communicated with the mortise 3.1 of the prefabricated wall in the upper frame. The upper part of the lower anchor bar rod 3.2 penetrates through the tenon of the lower prefabricated wall from bottom to top and is positioned above the tenon 1.1 of the lower prefabricated wall. The number of the screw locking devices is several, and each screw locking device is arranged into 2 rows or 4 rows, in this embodiment, each screw locking device is arranged into 4 rows. Each row of screw locking devices comprises a plurality of screw locking devices which are distributed along the length direction of the tenon of the lower prefabricated wall at equal intervals. The opposite two sides of prefabricated wall tenon in lower panel all distributes and has a plurality of screw locking device, specifically, screw locking device symmetric distribution is in the opposite both sides of prefabricated wall tenon in lower panel.
Further, as shown in fig. 1 and 4, an upper prestressed anchor bar 4.9 is arranged at the upper end of the upper guide cylinder. Therefore, the stability of the embedded upper screw lock assembly embedded in the upper prefabricated wall body in advance can be improved. The lower end of the lower fixed cylinder is provided with a lower prestressed anchor bar 4.10. So, can improve pre-buried stability of screw lock subassembly is buried underground in last width of cloth prefabricated wall in advance under pre-buried.
Furthermore, an internal thread is arranged on the inner wall of the lower fixing barrel, an external thread is arranged on the outer wall of the limiting barrel, and the limiting barrel is connected with the lower fixing barrel through the thread. So, be convenient for spacing section of thick bamboo installation and dismantlement, simultaneously, still be convenient for adjust the mounting height of spacing section of thick bamboo fixed cylinder down.
Further, as shown in fig. 1, 2, 3 and 4, the pre-embedded upper screw lock assembly further includes an upper guide cylinder 4.1 pre-embedded on the lower end surface of the upper prefabricated wall body, a sliding column 4.12 sliding along the upper guide cylinder, and an upper spring 4.13 located above the sliding column. The upper end and the lower end of the upper guide cylinder are sealed, and the lower end of the upper guide cylinder is provided with a plug rod via hole. The sliding column is propped against the lower end of the upper guide cylinder under the action of the upper spring. The insertion rod 4.2 is fixedly arranged at the lower end of the sliding column. In this embodiment, the downward pressure of the upper spring on the sliding column is greater than the upward pressure of the lower spring on the annular pressing sheet. Because the weight of the prefabricated wall body of upper panel is big, at the in-process of hoist and mount prefabricated wall body of upper panel, the inserted bar of screw lock subassembly is adjusted well the operation degree of difficulty with the spacing spliced eye of screw lock subassembly under pre-buried great in advance and is adjusted well, appears easily in the actual operation in-process not adjusting well because of inserted bar and spacing spliced eye for the inserted bar of screw lock subassembly supports on the up end of prefabricated wall body of lower panel in advance in pre-buried, and leads to pre-buried screw lock subassembly to be destroyed. In order to solve this problem, this scheme improves the spiral shell lock subassembly on pre-buried, and the in-process of the prefabricated wall body of width of cloth on the hoist and mount if not adjusting well with spacing spliced eye according to the inserted link for when the inserted link of spiral shell lock subassembly supports the top surface at the prefabricated wall tenon of width of cloth down in the pre-buried, the effort of going up the spring will be overcome to the slip post, makes inserted link and slip post up move to the guide cylinder in, thereby avoid the pre-buried problem of spiral shell lock subassembly destroyed.
Further, as shown in fig. 1 and 4, an embedded pipe 4.16 is arranged on an upper guide cylinder in an embedded upper screw locking assembly of one or two screw locking devices in each screw locking device, the upper guide cylinder is connected with the sliding column in a sliding and sealing manner, and a cavity above the sliding column in the upper guide cylinder is filled with liquid. One end of the embedded pipe is communicated with the upper part of the inner cavity of the upper guide cylinder, and the other end of the embedded pipe is communicated with the outer side surface of the upper prefabricated wall body. The other end of the embedded pipe is internally provided with a rubber sealing plug 4.17 which can be pulled out. Although the embedded upper screw lock assembly can be effectively solved, the embedded upper screw lock assembly is damaged because the insertion rod is not aligned with the limiting insertion hole in the process of hoisting the upper prefabricated wall body; however, after the upper prefabricated wall body is hung on the upper end face of the lower prefabricated wall body, the screw locking device is completely shielded, an operator often difficultly judges whether the insertion rod is inserted into the limiting insertion hole, if the insertion rod is not inserted into the limiting insertion hole, the offshore failure of the lower prefabricated wall body and the upper prefabricated wall body can be caused, in order to solve the problem, the scheme is improved, one screw locking device is improved, in the process of hoisting the upper prefabricated wall body, if the insertion rod of the screw locking device is not aligned with the limiting insertion hole, the insertion rod of the screw locking device is abutted against the upper end face of the lower prefabricated wall body, the insertion rod and the sliding column are moved upwards into the upper guide cylinder, so that liquid in the upper guide cylinder is pressed out through the embedded pipes (the liquid automatically jacks the rubber sealing plugs), and thus, the operator can judge whether the insertion rod of the screw locking device is aligned with the limiting insertion hole or not through whether the liquid in the embedded pipes flows out or not, and then the situation that whether the rod of the screw locking device is aligned with the limiting insertion hole is aligned with the embedded pipe is judged; if liquid flows out of the embedded pipes, the plug-in rod of the screw locking device is not aligned with the limiting plug-in hole; at the moment, the operator needs to hoist the upper prefabricated wall body again so as to align the plug rod of the screw locking device with the limiting plug hole.
The second embodiment is the same as the first embodiment, except that,
as shown in fig. 5 and 6, the vertical connection system further includes a bent bolt connection device 6. The bent bolt connecting device is used for connecting the lower prefabricated wall body and the upper prefabricated wall body. The bent bolt connecting device 6 comprises a bent bolt 6.1, a bent bolt lower channel 6.2 arranged at the upper part of the lower prefabricated wall body and a bent bolt upper channel 6.3 arranged at the lower part of the upper prefabricated wall body. The upper channel of the bent bolt is arc-shaped, and the lower channel of the bent bolt is arc-shaped. The upper end of the lower channel of the bent bolt is communicated with the upper end face of the lower prefabricated wall body, and the lower end of the lower channel of the bent bolt is communicated with the outer side face of the lower prefabricated wall body. The lower end of the upper channel of the bent bolt is communicated with the lower end face of the upper prefabricated wall body, and the upper end of the upper channel of the bent bolt is communicated with the outer side face of the upper prefabricated wall body. And the bent bolt penetrates through the lower bent bolt channel and the upper bent bolt channel and connects the lower prefabricated wall body and the upper prefabricated wall body into a whole.
The bent bolt connecting device can be matched with the sleeve connecting device and the screw locking device to connect the lower prefabricated wall body and the upper prefabricated wall body into a whole, specifically, the upper prefabricated wall body is hoisted to the upper end of the lower prefabricated wall body, a lower anchor bar on the lower prefabricated wall body is inserted into an upper sleeve on the upper prefabricated wall body, and an insertion rod of a pre-embedded upper screw locking assembly pre-embedded on the upper prefabricated wall body is inserted into a limiting insertion hole in a limiting cylinder pre-embedded on the lower prefabricated wall body; and then, the bent bolt penetrates through the lower bent bolt channel and the upper bent bolt channel to connect the lower prefabricated wall body and the upper prefabricated wall body into a whole, so that the connection strength and integrity of the lower prefabricated wall body and the upper prefabricated wall body are further ensured. More importantly, the bent bolt connecting device is matched with the sleeve connecting device and the screw locking device, and the three connecting modes act together, so that the defects of the three modes can be effectively overcome, the connecting strength and the reliability between the upper prefabricated wall body and the lower prefabricated wall body are obviously improved, and the problem that the connecting part of the underground continuous wall is broken due to the failure of any one connecting mode, and the engineering is adversely affected is avoided.
In this embodiment, the upper end of the lower channel of the bent bolt and the lower end of the upper channel of the bent bolt are both located on the inner side of the annular sealing rubber strip. So, at the in-process of pouring into the grout material that excels in through the slip casting passageway in to the upper sleeve, the air in the gap between the lower terminal surface of upper panel prefabricated wall body and the up end of lower panel prefabricated wall body can be discharged through bent bolt passageway down and bent bolt passageway on to be favorable to pouring into the grout material that excels in through the upper sleeve in the gap between the lower terminal surface of upper panel prefabricated wall body and the up end of lower panel prefabricated wall body and bent bolt passageway down and the bent bolt passageway on.
Further, as shown in fig. 5 and 6, the lower channel 6.2 of the bent bolt and the upper channel of the bent bolt are both counter bored holes, and the lower end of the lower channel of the bent bolt is provided with a stepped hole for accommodating the head or the nut of the bent bolt. The upper end of the elbow bolt upper channel 6.3 has a stepped bore for receiving the head or nut of the elbow bolt. The head of the bent bolt is received in a stepped hole in the upper end of the upper channel of the bent bolt or in a stepped hole in the lower end of the lower channel of the bent bolt. The nut on the elbow bolt is received in a stepped hole in the lower end of the elbow bolt lower passage or in a stepped hole in the upper end of the elbow bolt upper passage, and in this embodiment, the nut on the elbow bolt is received in a stepped hole in the lower end of the elbow bolt lower passage. So, guarantee that the head and the nut of curved bolt all hold in the shoulder hole, be favorable to the prefabricated wall body cartridge of upper panel to arrive in the underground soil layer.
Further, as shown in fig. 5 and 6, the number of the bent bolt connection devices is several. The relative both sides of prefabricated wall tenon of lower panel are equallyd divide and are distributed a plurality of curved bolted connection device, in this embodiment, each curved bolted connection device distributes and is two rows, and two rows of curved bolted connection device distribute in the relative both sides of prefabricated wall tenon of lower panel. Each row of bent bolt connecting devices comprise a plurality of bent bolt connecting devices which are distributed along the length direction of the tenon of the lower prefabricated wall at equal intervals.
The screw locking devices are arranged in two rows or four rows, in the embodiment, the screw locking devices are arranged in two rows, and the two rows of screw locking devices are distributed between the two rows of bent bolt connecting devices.
The third concrete embodiment is a construction method of the embedded sleeve combined underground continuous wall, and the concrete structure of the embedded sleeve combined underground continuous wall of the embodiment refers to the second concrete embodiment.
A construction method of an embedded sleeve combined underground continuous wall sequentially comprises the following steps:
firstly, constructing a cement-soil underground continuous wall;
secondly, pressing the lower prefabricated wall body, and pressing the lower prefabricated wall body into the cement-soil underground continuous wall along the vertical direction until the upper end surface of the lower prefabricated wall body is 0.8-1.2 m higher than the ground surface;
hoisting an upper prefabricated wall body, hoisting the upper prefabricated wall body to be right above a lower prefabricated wall body, then slowly descending the upper prefabricated wall body to a set height, wherein the distance between the lower end of the upper prefabricated wall body and the upper end of the lower prefabricated wall body is 0.3-0.6 m, and then adjusting the position of the upper prefabricated wall body to align an upper sleeve on the upper prefabricated wall body with a lower anchor bar on the lower prefabricated wall body; aligning the plug-in connection rod on the upper prefabricated wall body with the limiting plug-in connection hole on the lower prefabricated wall body; then, slowly descending the upper prefabricated wall body to enable the lower anchor bar rod on the lower prefabricated wall body to be inserted into the upper sleeve on the upper prefabricated wall body, enabling the insertion rod on the upper prefabricated wall body to be inserted into the limiting insertion hole on the lower prefabricated wall body, and enabling the clamping ring to clamp the clamping joint so as to prevent the insertion rod from moving upwards;
fourthly, installing a bent bolt connecting device, enabling a bent bolt to penetrate through a lower bent bolt channel and an upper bent bolt channel, then locking a nut on the bent bolt, and connecting the lower prefabricated wall body and the upper prefabricated wall body into a whole;
fifthly, injecting high-strength grouting material into the upper sleeve through the grouting channel, so that the high-strength grouting material is injected into a gap between the lower end face of the upper prefabricated wall and the upper end face of the lower prefabricated wall, the lower channel of the bent bolt, the upper channel of the bent bolt and the upper sleeve through the upper sleeve;
then, sealing the peripheral edges of the gap between the upper prefabricated wall body and the lower prefabricated wall body through sealant;
and (VI) continuously pressing the upper prefabricated wall body and the lower prefabricated wall body into the cement-soil underground continuous wall.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modifications, alterations and equivalent changes made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. An embedded sleeve combined underground continuous wall, comprising:
prefabricating a wall body on the lower wall;
prefabricating a wall body on the upper part;
the vertical connecting system is used for connecting the lower prefabricated wall body and the upper prefabricated wall body and is characterized by comprising a sleeve connecting device, wherein the sleeve connecting device comprises an upper sleeve embedded at the bottom of the upper prefabricated wall body in advance, a lower anchor bar embedded at the top of the lower prefabricated wall body, a grouting channel arranged at the bottom of the upper prefabricated wall body and a grout overflow channel arranged at the bottom of the upper prefabricated wall body, the lower end of the upper sleeve is communicated with the lower end face of the upper prefabricated wall body, the upper part of the lower anchor bar extends out of the upper part of the lower prefabricated wall body, the upper part of the lower anchor bar is inserted into the upper sleeve, one end of the grout overflow channel is communicated with the outer side face of the upper prefabricated wall body, the other end of the grouting channel is communicated with the outer side face of the upper prefabricated wall body, the grouting channel is used for injecting high-strength grout into the upper sleeve, a gap between the upper sleeve and the lower anchor bar is filled with the high-strength grouting material, and the upper end of the upper prefabricated wall body is filled with the high-strength grout gap between the lower prefabricated wall body.
2. The embedded sleeve combined underground continuous wall as claimed in claim 1, wherein the vertical connection system further comprises a screw locking device, the screw locking device comprises an embedded lower screw locking component and an embedded upper screw locking component, the embedded upper screw locking component is embedded in the lower end surface of the upper prefabricated wall body in advance, the embedded upper screw locking component comprises an insertion rod, and a clamping joint is arranged at the lower end of the insertion rod;
the embedded lower screw lock assembly comprises a lower fixed cylinder embedded in advance on the upper end face of the lower prefabricated wall body, a limiting cylinder fixedly arranged in the lower fixed cylinder, and a clamping ring and a lower spring arranged in the lower fixed cylinder, the lower end of the lower fixed cylinder is sealed, the upper end of the lower fixed cylinder is open, an inner hole of the limiting cylinder is formed into a limiting insertion hole matched with the insertion rod, the lower end of the limiting insertion hole is a clamping ring guide cavity with the inner diameter gradually increased from top to bottom, the clamping ring supports against the inner wall of the clamping ring guide cavity under the action of the lower spring, the insertion rod is inserted into the limiting insertion hole, and the clamping ring clamps the clamping head to prevent the insertion rod from moving upwards.
3. The embedded sleeve combined underground continuous wall as claimed in claim 2, wherein the embedded upper screw locking assembly further comprises an upper guide cylinder embedded on the lower end surface of the upper prefabricated wall body in advance, a sliding column sliding along the upper guide cylinder and an upper spring positioned above the sliding column, the upper end and the lower end of the upper guide cylinder are closed, the lower end of the upper guide cylinder is provided with a through hole for a plugging rod, the sliding column abuts against the lower end of the upper guide cylinder under the action of the upper spring, and the plugging rod is fixedly arranged at the lower end of the sliding column.
4. The embedded sleeve combined type underground continuous wall as claimed in claim 2 or 3, wherein a lower prefabricated wall tenon is arranged in the middle of the upper end surface of the lower prefabricated wall body, an upper prefabricated wall mortise is arranged in the middle of the lower end surface of the upper prefabricated wall body, the lower prefabricated wall tenon is arranged in the upper prefabricated wall mortise, the lower end of the upper sleeve is communicated with the upper prefabricated wall mortise, and the upper part of the lower anchor bar rod penetrates through the lower prefabricated wall tenon from bottom to top and is positioned above the lower prefabricated wall tenon; and a plurality of screw locking devices are distributed on two opposite sides of the lower prefabricated wall tenon.
5. The embedded sleeve combined underground continuous wall as claimed in claim 1, 2 or 3, wherein the vertical connection system further comprises a bent bolt connection device, the bent bolt connection device comprises a bent bolt, a bent bolt lower channel arranged at the upper part of the lower prefabricated wall body and a bent bolt upper channel arranged at the lower part of the upper prefabricated wall body, the upper end of the bent bolt lower channel is communicated with the upper end surface of the lower prefabricated wall body, the lower end of the bent bolt lower channel is communicated with the outer side surface of the lower prefabricated wall body, the lower end of the bent bolt upper channel is communicated with the lower end surface of the upper prefabricated wall body, the upper end of the bent bolt upper channel is communicated with the outer side surface of the upper prefabricated wall body, and the bent bolt penetrates through the bent bolt lower channel and the bent bolt upper channel and connects the lower prefabricated wall body and the upper prefabricated wall body into a whole.
6. The embedded sleeve combined type underground continuous wall as claimed in claim 5, wherein a lower prefabricated wall tenon is arranged in the middle of the upper end surface of the lower prefabricated wall body, an upper prefabricated wall mortise is arranged in the middle of the lower end surface of the upper prefabricated wall body, the lower prefabricated wall tenon is arranged in the upper prefabricated wall mortise, the lower end of the upper sleeve is communicated with the upper prefabricated wall mortise, and the upper part of the lower anchor rod penetrates through the lower prefabricated wall tenon from bottom to top and is positioned above the lower prefabricated wall tenon; a plurality of bent bolt connecting devices are uniformly distributed on two opposite sides of the lower prefabricated wall tenon.
7. The embedded sleeve combined underground continuous wall as claimed in claim 1, 2 or 3, wherein the middle of the upper end surface of the lower prefabricated wall body is provided with a tenon of the lower prefabricated wall body, and the middle of the lower end surface of the upper prefabricated wall body is provided with a mortise of the upper prefabricated wall body.
8. The embedded sleeve combined type underground continuous wall as claimed in claim 1, 2 or 3, wherein the sleeve connecting device comprises an upper anchor bar pre-embedded at the bottom of the upper prefabricated wall body, the lower part of the upper anchor bar is provided with an upper port of an upper sleeve inserted into the upper sleeve, and a gap between the upper sleeve and the upper anchor bar is filled with high-strength grouting material.
9. The embedded sleeve combined underground continuous wall as claimed in claim 1, 2 or 3, wherein an annular sealing rubber strip is arranged between the lower end surface of the upper prefabricated wall body and the upper end surface of the lower prefabricated wall body, and the annular sealing rubber strip extends along the edge of the upper end surface of the upper prefabricated wall body.
10. The construction method of the embedded sleeve combined underground continuous wall as claimed in claim 5, which is characterized by comprising the following steps in sequence:
firstly, constructing a cement-soil underground continuous wall;
secondly, pressing the lower prefabricated wall body in a press fit mode, and pressing the lower prefabricated wall body into the cement-soil underground continuous wall along the vertical direction until the upper end face of the lower prefabricated wall body is h meters higher than the ground surface;
hoisting the upper prefabricated wall body, hoisting the upper prefabricated wall body to be right above the lower prefabricated wall body, then slowly descending the upper prefabricated wall body to a set height, and then adjusting the position of the upper prefabricated wall body to align an upper sleeve on the upper prefabricated wall body with a lower anchor bar rod on the lower prefabricated wall body; aligning the plug-in connection rod on the upper prefabricated wall body with the limiting plug-in connection hole on the lower prefabricated wall body; then, slowly descending the upper prefabricated wall body to enable the lower anchor bar rod on the lower prefabricated wall body to be inserted into the upper sleeve on the upper prefabricated wall body, enabling the insertion rod on the upper prefabricated wall body to be inserted into the limiting insertion hole on the lower prefabricated wall body, and enabling the clamping ring to clamp the clamping joint so as to prevent the insertion rod from moving upwards;
fourthly, installing a bent bolt connecting device, enabling a bent bolt to penetrate through a lower bent bolt channel and an upper bent bolt channel, then locking a nut on the bent bolt, and connecting the lower prefabricated wall body and the upper prefabricated wall body into a whole;
injecting high-strength grouting material into the upper sleeve through the grouting channel, so that the high-strength grouting material is injected into a gap between the lower end face of the upper prefabricated wall and the upper end face of the lower prefabricated wall, a lower bent bolt channel, an upper bent bolt channel and the upper sleeve through the upper sleeve;
then, sealing the peripheral edges of the gap between the upper prefabricated wall body and the lower prefabricated wall body by using sealant;
and (VI) continuously pressing the upper prefabricated wall body and the lower prefabricated wall body into the cement-soil underground continuous wall.
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| CN202210937664.5A CN115419050A (en) | 2022-08-05 | 2022-08-05 | Embedded sleeve combined underground continuous wall and construction method thereof |
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| CN202210937664.5A CN115419050A (en) | 2022-08-05 | 2022-08-05 | Embedded sleeve combined underground continuous wall and construction method thereof |
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| CN111172991A (en) * | 2019-11-11 | 2020-05-19 | 浙江省建筑设计研究院 | Embedded steel bar sleeve type prefabricated underground continuous wall |
| KR102223856B1 (en) * | 2020-09-04 | 2021-03-05 | 시지엔지니어링(주) | Foundation structure of waste landfill site and construction method thereof |
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| CN101979778A (en) * | 2010-10-07 | 2011-02-23 | 周兆弟 | Method for butting concrete prefabricated member consisting of prefabricated member connector |
| WO2018146431A1 (en) * | 2017-02-13 | 2018-08-16 | Soletanche Freyssinet | Anchor device for pre-stressed cast wall |
| CN208309568U (en) * | 2018-05-08 | 2019-01-01 | 中国铁路设计集团有限公司 | A kind of prefabricated assembled ground-connecting-wall structure |
| CN111172991A (en) * | 2019-11-11 | 2020-05-19 | 浙江省建筑设计研究院 | Embedded steel bar sleeve type prefabricated underground continuous wall |
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