CN205399401U - Novel underground continuous wall of wallboard formula - Google Patents
Novel underground continuous wall of wallboard formula Download PDFInfo
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- CN205399401U CN205399401U CN201620203751.8U CN201620203751U CN205399401U CN 205399401 U CN205399401 U CN 205399401U CN 201620203751 U CN201620203751 U CN 201620203751U CN 205399401 U CN205399401 U CN 205399401U
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Abstract
The utility model discloses a novel underground continuous wall of wallboard formula. This diaphragm wall comprises a plurality of unit groove section, and each unit groove section includes: reinforced concrete leads wall, two main walls and one and mills the fishplate bar, milling the fishplate bar and building in between two main walls, the embedding degree of depth 20~30cm is pour by plain concrete or soil cement and forms. I phase main wall full play diaphragm wall rigidity is big, resist the moment of flexure, supporting construction is out of shape little characteristics, utilizes it to build in that the degree of depth, rigidity are big etc. Solves the stable problem of foundation ditch, utilizes the big solution pit deformation problem of diaphragm wall the stiffness, mill fishplate bar and I phase main wall and play effect native between water proof prevention of seepage, barricade, the manger plate. This novel underground continuous wall of wallboard formula construction process is simple, and the save material quantity has saved junction block (case) and has hung to put and push up and pull out the link, has avoided the junction block to pull out absolutely or the pipe laying risk, and is efficient, with low costs.
Description
Technical field
This utility model relates to field of engineering technology, is a kind of wall board type Novel underground diaphragm wall, it is adaptable to level of ground water bury shallow, containing the mutual Deep Foundation Pit Supporting Project of deep & thick silt or aquiclude.
Background technology
In recent years, degree and requirement that China's Urban Underground Space Excavation utilizes are more and more higher, China comes into the epoch large-scale developing and utilizing the underground space, large-scale basement in high rise building, market place builet below the ground, underground municipal works etc. have deep-foundation pit engineering, urban architecture thing is day by day intensive, the foundation ditch of more than degree of depth 15m again and again occur such as structure large deformation, hole wall unstability, the end, hole convex gush, the problem such as antiseepage or precipitation inefficacy, not only build and self baffle, and cause a large amount of surrounding enviroment problem.
Diaphram wall is for utilizing trench machine, by the retaining wall effect of mud, digs out narrow and deep groove in underground, and within it builds suitable material and form the continuous underground wall body together with antiseepage (water), gear soil and weight-bearing function.Have that integral rigidity is big, good integrity, antiseepage intercept water good, surrounding enviroment disturbance is the little feature of performance, and ground limited within can making full use of property line and space, next-door neighbour's existing building and underground utilities excavate foundation ditch deep, big；" the two wall unifications " support technology combined with agent structure, can be greatly saved construction costs, adopt " contrary sequence method " construction, above and below ground synchronous construction, greatly speed up construction speed, reduction of erection time.Making full use of the underground space, it is achieved in urban tridimensionalization development process, diaphram wall has been acknowledged as one of best supporting construction.
Diaphram wall seam is the key position easily gone wrong in diaphram wall waterproofing design and use procedure thereof, diaphram wall seam within the scope of excavation of foundation pit and below foundation ditch substrate is all extremely important, apply more joint form at present and have junction block, joint case and various iris type joints etc., due to reasons such as seam construction wrong, quality control on construction difficulty is bigger, wall seam percolating water is the common quality defect of construction of diaphragm wall, seepage not only directly affects the use of engineering underground structure, and is difficult to process.For ensure continuous underground wall structure entirety without seep water, leaks, uniform force, and economize on resources and construction costs, form the density of the intersegmental seam of unit groove of diaphram wall, joint treatment is key link.
Summary of the invention
The purpose of this utility model is a kind of good integrity of research and development, and in Excavation Process, malformation is little, and impervious gear soil is respond well, saves the wall board type diaphram wall of engineering cost, and this construction of diaphragm wall technique is simple, saves material usage and construction costs.
The technical scheme that this utility model provides is: a kind of wall board type Novel underground diaphragm wall, it is made up of several groove segment units, it is characterized in that: each groove segment unit includes armored concrete and leads wall, first, second main wall and the first milling fishplate bar being connected between two main walls, described first, second main wall is reinforced concrete structure, it is mounted on soil layer or basement rock, has reached the build-in stability criterion requirement of diaphragm wall；Described armored concrete is led wall and is arranged on main wall body of wall both sides, and the armored concrete of two adjacent slot segment units is led wall and is connected as a single entity；The thickness of described milling fishplate bar is less than the thickness of main wall, its two ends are respectively embedded in two main walls, connected by the second milling fishplate bar between the adjacent main wall of two adjacent slot segment units, second milling fishplate bar one end is embedded in the second main wall of a groove segment unit, and the other end embeds in the first main wall being adjacent unit groove section.
This utility model is technical scheme preferably: the size of described first, second main wall is identical, and its width is 3～6m, thick 0.5～1.5m.
This utility model is technical scheme preferably: described first milling fishplate bar and the second milling fishplate bar are plain concrete or soil cement structure, and its thickness is the 1/2-2/3 of main wall thickness, and width is 2.8～5.6m；The degree of depth that first, second milling fishplate bar two ends embed in main wall is 20～30cm.
This utility model is technical scheme preferably: the cross section of wall (1) led by described armored concrete is inverted "L" shaped or "] [" type.
The construction method of a kind of wall board type Novel underground diaphragm wall described in the utility model, Specific construction step is as follows:
(1) according to existing construction method construct diaphram wall lead wall, lead the armored concrete that wall is cast-in-place or prefabricated and lead wall, be arranged on main wall body both sides, cross section is inverted "L" shaped or "] [" type；Act primarily as grooving guide-localization, safeguard the effect of slurry trench stability；
(2) along leading wall length direction, diaphram wall is divided into several groove segment units and several the second milling fishplate bar groove sections being placed between two adjacent slot segment units according to designing requirement；
(3) according to designing requirement, each groove segment unit is divided into the first main wall groove section, first milling fishplate bar groove section and the second main wall groove section three part, and first groove segment unit first main wall groove fragment position adopt grooving mechanical equivalent of light excavation form the first main wall groove, the one-tenth groove depth of the first main wall groove enters at least 15 meters of degree of depth below at the bottom of foundation ditch, a left side for first main wall groove, right two ends are respectively beyond the first main wall groove section edge 20-30cm, after first main wall groove completes, put into the previously prepared good steel reinforcement cage matched with the first main wall groove, and casting concrete forms the first main wall of first groove segment unit, the build-in of the first main wall requires to reach the build-in stability criterion requirement of foundation ditch diaphragm wall；
(4) grooving mechanical equivalent of light excavation is adopted to form the second main wall groove according to designing requirement in the second main wall groove fragment position of first groove segment unit, the one-tenth groove depth of the first main wall groove enters at least 15 meters of degree of depth below at the bottom of foundation ditch, the left and right two ends of the second main wall groove are respectively beyond the second main wall groove section edge 20-30cm, after second main wall groove completes, put into the previously prepared good steel reinforcement cage matched with the second main wall groove, and casting concrete forms the second main wall of first groove segment unit, the build-in of the second main wall requires to reach the build-in stability criterion requirement of foundation ditch diaphragm wall；
(5) slot milling machine is entered under the first milling fishplate bar groove fragment position between the first main wall groove section of diaphram wall the first groove segment unit and the second main wall groove section, mill off the first groove section main wall and the second groove section main wall exceed the concrete at groove section edge respectively, form fresh zigzag concrete faying surface, and between the first groove section main wall and the second groove section main wall casting concrete or soil cement, forming the first milling fishplate bar, the degree of depth of the first milling fishplate bar enters 2-5 rice below at the bottom of foundation ditch and meets analysis of seepage flow stability；
(6) step (4) and step (5) are repeated, complete the construction of the second groove segment unit, and enter slot milling machine under between the first groove segment unit and the second groove segment unit, second main wall of mill off the first groove segment unit and the first main wall of the second groove segment unit exceed the concrete at groove section edge respectively, form fresh zigzag concrete faying surface, and between the first groove segment unit and the second groove segment unit casting concrete or soil cement, forming the second milling fishplate bar, the degree of depth of the second milling fishplate bar enters 2-5 rice below at the bottom of foundation ditch and meets analysis of seepage flow stability；
(7) construction of step (6) the second milling fishplate bar of being sequentially completed between multiple groove segment unit and multiple groove segment unit is repeated to last groove segment unit, then slot milling machine is entered under in the end between a groove segment unit and first groove segment unit, second main wall of last groove segment unit of mill off and the first main wall of the first groove segment unit exceed the concrete at groove section edge respectively, form fresh zigzag concrete faying surface, and the second milling fishplate bar of in the end constructing between a groove segment unit and first groove segment unit, form a complete diaphram wall.
Trenching construction in step (3) and step (4) is to adopt grab bucket, or hydraulic pressure milling, or impact is bored, or grab bucket and hydraulic pressure milling combine, or the method construction that impact is bored and grab bucket combines.
Wide 3～the 6m of wall of described main wall, thick 0.5～1.2m, be mounted on soil layer or basement rock；The size of main wall and Reinforcement Design need to be calculated by underground underground diaphragm wall inner force and deformation, checking of bearing capacity；According to the employing grab bucket of foundation ditch formation condition or the equipment construction grooving such as hydraulic pressure milling or impact brill, become groove depth to enter should adopting of silty sand ground (SPT blow count N hits more than 50) and grab milling combination or bore the method grooving grabbing combination.The length of described first milling fishplate bar groove section and the second milling fishplate bar groove section is 2.8～5.6m.
The Main Function of the main wall in this utility model is to ensure that stablizing of foundation ditch, its construction reference is identical with the construction reference of existing diaphram wall, in work progress, the requirement according to soil layer calculates and designs its building-in depth, guarantee that main wall can reach build-in stability, if temporary structure has only to embed in the soil layer that below foundation ditch is stable, if permanent structure, it is necessary to embed in the basement rock of below foundation ditch；Milling fishplate bar Main Function plays the effect of soil between water proof antiseepage, barricade, it is built by plain concrete or soil cement to form, bottom enters water barrier or entrance water-bearing layer certain depth meets analysis of seepage flow stability to reduce hydraulic gradient, cut off the hydraulic connection of the inside and outside diving of foundation ditch and artesian water, or enough degree of depth bottom entrance foundation ditch, collectively form reliable water seal curtain with main wall, play the effect of soil between water proof antiseepage, barricade.Described water barrier be infiltration coefficient less than 0.001m/d soil layer, such as general clay, mud, tight rock etc..
Main wall in this utility model can give full play to the feature that diaphragm wall rigidity is big, resist torque, Supporting Structure deformation are little, utilizes its building-in depth, rigidity big etc. and solves base pit stability problem, utilizes the big solution foundation pit deformation problem of diaphragm wall integral rigidity；Milling fishplate bar plays the effect of soil, dash between water proof antiseepage, barricade together with main wall.Compared with tradition diaphram wall version and construction method, this wall board type Novel underground construction of diaphragm wall technique is simple, save material usage and construction costs, construction method is ripe, eliminate junction block (case) hang and pull link, avoiding junction block to pull off or pipe laying risk, efficiency is high, cost is low.
Accompanying drawing explanation
Fig. 1 is Facad structure schematic diagram of the present utility model；
Fig. 2 is transverse sectional view of the present utility model；
Fig. 3 is longitudinal sectional view of the present utility model；
Fig. 4, Fig. 5 are this utility model embodiment schematic diagrams.
In figure: wall led by 1 armored concrete, 2 first main walls, 2-1 the second main wall, 3 first milling fishplate bars, 3-1 the second milling fishplate bar, 4 miscellaneous fills, 5 sandy silts, 6 silt clay, 7 silty claies, 8 sandy silt folder flour sands, 9 Extra-fine sand, 10 waist rails, 11 Guan Liang, 12 reinforced concrete inner supports.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is further described.A kind of wall board type Novel underground diaphragm wall as shown in Figure 1 to Figure 3, it is made up of several groove segment units, each groove segment unit includes armored concrete and leads wall 1, first, second main wall 2,2-1 and the first milling fishplate bar 3 being connected between two main walls, reinforced concrete structure identical sized by described first, second main wall 2,2-1, its width is 3～6m, thick 0.5～1.5m；Described armored concrete is led wall 1 and is arranged on main wall body of wall both sides, and the armored concrete of two adjacent slot segment units is led wall 1 and is connected as a single entity, and cross section is inverted "L" shaped or "] [" type；Lead the construction of wall include smooth location, surveying setting-out, grooving and process spoir, assembling reinforcement, formwork supporting plate, casting concrete, form removal successively and arrange stull and lead the process backfilling soil outside wall.Described first its two ends of milling fishplate bar 3 are respectively embedded in first, second main wall 2,2-1, connected by the second milling fishplate bar 3-1 between the adjacent main wall of two adjacent slot segment units, second milling fishplate bar 3-1 one end is embedded in the second main wall 2-1 of a groove segment unit, and the other end embeds in the first main wall 2 being adjacent unit groove section.Described first milling fishplate bar 3 and the second milling fishplate bar 3-1 are plain concrete or soil cement structure, and its thickness is the 1/2-2/3 of main wall thickness, and width is 2.8～5.6m；The degree of depth that first, second milling fishplate bar 3,3-1 two ends embed in main wall is 20-30cm.
After first main wall groove section of each unit groove section and the second main wall groove section casting concrete, the cutting with the first milling fishplate bar joint should be carried out within the rational time and construct.First main wall groove section and the second main wall groove section casting concrete optimized cutting intensity are 7d～14d age strength, and the first milling fishplate bar groove section of constructing within this time period is the most efficient, economical.
Embodiment one: be specific to certain foundation ditch and construct, agent structure is a 46 floor framed-tube structure, three layers basement is set, excavation of foundation pit degree of depth 17.51m, foundation pit side-wall is followed successively by miscellaneous fill, sandy silt from top to bottom, silt clay, silty clay, sandy silt folder flour sand and Extra-fine sand, subsoil water is mainly perched water and artesian water.This engineering adopts wall board type Novel underground diaphragm wall as foundation pit enclosure structure, foundation pit construction stage diaphram wall is not only as soil-baffling structure but also as water-stop curtain, diaphram wall main wall thickness is 1.0m, milling fishplate bar thickness 0.6m, after construction of diaphragm wall completes, will be close to the wall of leading inside foundation ditch remove, and vertically arranged three roads horizontal reinforcement concrete support system (as shown in Figure 5) in foundation ditch.The concrete construction procedure of this wall board type Novel underground diaphragm wall is as follows:
(1) construction lead wall: according to existing construction method construct diaphram wall lead wall, leading wall is that cast-in-situ steel reinforced concrete leads wall, is arranged on main wall body both sides, and cross section is inverted "L" shaped.Lead the Specific construction step of wall: be followed successively by smooth location, surveying setting-out, grooving and process spoir, assembling reinforcement, formwork supporting plate, casting concrete, form removal and stull be set and lead backfill soil outside wall；Smooth location needs only assure that place meets construction requirement；Surveying setting-out is according to construction drawing measurement location, then uses pulverized limestone unwrapping wire；Grooving can directly adopt artificial grooving, grooving degree of depth 1.5-1.8m, wide 1.2-1.5m, after digging, the sidewall of cell body is evened out process, just in the outer face, both sides of cell body and the assembling reinforcement of position, two side after digging, adopting the cold rolled reinforcing bar of 8-10mm diameter, the spacing of vertical muscle is 20-30cm, the spacing of horizontal bar is 15-20cm, vertical employing steel wire lashing between muscle and horizontal bar；Formwork supporting plate is to adopt steel form supporting thick for 4-6mm in cell body two side, and uses steel pipe support between the steel plate of both sides；Concrete adopts C20, uniformly builds, in casting process, it is consolidated, and needs to carry out the maintenance of 5-7 days after concreting well；When form removal, it is necessary to the concrete wall of cell body both sides is arranged a wood stull every 10-15m, it is also possible to carry out building by laying bricks or stones at cell body inwall employing solid brick and both sides body of wall is reinforced；
(2) ground-connecting-wall unit groove section is divided: according to design drawing, diaphram wall is divided into several groove segment units and several the second milling fishplate bar groove sections being placed between two adjacent slot segment units, each groove segment unit is divided into the first main wall groove section, the first milling fishplate bar groove section and the second main wall groove section three part, and the angle groove section of foundation ditch is set to main wall groove section；
(3) unit groove section construction
A. hydraulic grab grooving equipment excavation is adopted to form the first main wall groove in the first main wall groove fragment position of first groove segment unit, the one-tenth groove depth of the first main wall groove enters below at the bottom of foundation ditch 17.6 meters, in arrival fine sand layer, the left and right two ends of the first main wall groove are respectively beyond the first main wall groove section edge 20cm (joint set milling thickness of cutting).Putting into steel reinforcement cage, and casting concrete forms the first main wall 2 of first groove segment unit, the width of described first main wall 2 is 4m, and thickness is 1.0m；
B. hydraulic grab grooving equipment excavation is adopted to form the second main wall groove in the second main wall groove fragment position of first groove segment unit, the one-tenth groove depth of the second main wall groove enters below at the bottom of foundation ditch 17.6 meters, in arrival fine sand layer, the left and right two ends of the second main wall groove are respectively beyond the second main wall groove section edge 20cm (set milling thickness of cutting), after second main wall groove completes, put into steel reinforcement cage, and casting concrete forms the second main wall 2-1 of first groove segment unit, in second main wall 2-1 and step a, the size of the first main wall 2 is identical, width is 4m, and thickness is 1.0m；
C. slot milling machine is entered under the first milling fishplate bar groove fragment position between the first main wall groove section of diaphram wall the first groove segment unit and the second main wall groove section, mill off the first groove section main wall and the second groove section main wall exceed the concrete at groove section edge respectively, form fresh zigzag concrete faying surface, and between the first groove section main wall and the second groove section main wall casting concrete, form the first milling fishplate bar 3, the degree of depth of the first milling fishplate bar 3 enters below at the bottom of foundation ditch 3.5 meters, reach farinose argillic horizon, its thickness is 0.6m, and width is 2.8m；
(4) step (2) and step (3) are repeated, complete the construction of the second groove segment unit, and enter slot milling machine under between the first groove segment unit and the second groove segment unit, second main wall of mill off the first groove segment unit and the first main wall of the second groove segment unit exceed the concrete at groove section edge respectively, form fresh zigzag concrete faying surface, and between the first groove segment unit and the second groove segment unit casting concrete, form the second milling fishplate bar, the degree of depth of the second milling fishplate bar enters below at the bottom of foundation ditch 3.5 meters, reach farinose argillic horizon, its thickness is 0.6m, width is 2.8m；
(5) construction of step (4) the second milling fishplate bar of being sequentially completed between multiple groove segment unit and multiple groove segment unit is repeated to last groove segment unit, then slot milling machine is entered under in the end between a groove segment unit and first groove segment unit, second main wall of last groove segment unit of mill off and the first main wall of the first groove segment unit exceed the concrete at groove section edge respectively, form fresh zigzag concrete faying surface, and the second milling fishplate bar of in the end constructing between a groove segment unit and first groove segment unit, form a complete diaphram wall.
Embodiment one constructed rear a portion structural representation as shown in Figure 5, main wall in the present embodiment can give full play to the feature that diaphragm wall rigidity is big, resist torque, Supporting Structure deformation are little, milling fishplate bar plays the effect of soil, dash between water proof antiseepage, barricade together with main wall, and stability is also higher.Embodiment of the present utility model is regardless of and is limited to above-mentioned one, the difference of the existing construction technology of root Ju and each junction parameter, it is possible to write out multiple embodiment, do not repeat one by one at this.
Claims (4)
1. a wall board type Novel underground diaphragm wall, it is made up of several groove segment units, it is characterized in that: each groove segment unit includes armored concrete and leads wall (1), first, second main wall (2,2-1) and the first milling fishplate bar (3) being connected between two main walls, described first, second main wall (2,2-1) is reinforced concrete structure, described armored concrete is led wall (1) and is arranged on main wall body of wall both sides, and the armored concrete of two adjacent slot segment units is led wall (1) and is connected as a single entity；The thickness of described first milling fishplate bar (3) is less than the thickness of main wall (2), its two ends are respectively embedded in two main walls, connected by the second milling fishplate bar (3-1) between the adjacent main wall of two adjacent slot segment units, second milling fishplate bar (3-1) one end is embedded in second main wall (2-1) of a groove segment unit, and the other end embeds in the first main wall (2) being adjacent unit groove section.
2. a kind of wall board type Novel underground diaphragm wall according to claim 1, it is characterised in that: the size of described first, second main wall (2,2-1) is identical, and its width is 3～6m, thick 0.5～1.5m.
3. a kind of wall board type Novel underground diaphragm wall described in Ju claims 1, it is characterized in that: described first milling fishplate bar (3) and the second milling fishplate bar (3-1) are plain concrete or soil cement structure, its thickness is the 1/2-2/3 of main wall thickness, and width is 2.8～5.6m；The degree of depth that first, second milling fishplate bar (3,3-1) two ends embed in main wall is 20～30cm.
4. a kind of wall board type Novel underground diaphragm wall according to claim 1, it is characterised in that: the cross section of wall (1) led by described armored concrete is inverted "L" shaped or "] [" type.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620203751.8U CN205399401U (en) | 2016-03-16 | 2016-03-16 | Novel underground continuous wall of wallboard formula |
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| CN201620203751.8U CN205399401U (en) | 2016-03-16 | 2016-03-16 | Novel underground continuous wall of wallboard formula |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625299A (en) * | 2016-03-16 | 2016-06-01 | 中冶集团武汉勘察研究院有限公司 | Wallboard type novel underground continuous wall and construction method thereof |
| CN110258510A (en) * | 2019-05-28 | 2019-09-20 | 广州穗岩土木科技股份有限公司 | A kind of cast-in-place diaphram wall and assembled metro station construction integral method |
-
2016
- 2016-03-16 CN CN201620203751.8U patent/CN205399401U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625299A (en) * | 2016-03-16 | 2016-06-01 | 中冶集团武汉勘察研究院有限公司 | Wallboard type novel underground continuous wall and construction method thereof |
| CN110258510A (en) * | 2019-05-28 | 2019-09-20 | 广州穗岩土木科技股份有限公司 | A kind of cast-in-place diaphram wall and assembled metro station construction integral method |
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