CN103615253A - Shield cutter head overhaul working well support device and equipment - Google Patents
Shield cutter head overhaul working well support device and equipment Download PDFInfo
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- CN103615253A CN103615253A CN201310594640.5A CN201310594640A CN103615253A CN 103615253 A CN103615253 A CN 103615253A CN 201310594640 A CN201310594640 A CN 201310594640A CN 103615253 A CN103615253 A CN 103615253A
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Abstract
The invention discloses a shield cutter head overhaul working well support device and equipment and belongs to the field of foundation pit support. The device comprises a splicing type support structural body and a air-water isolation layer. The splicing type support structural body is an annular structure connected by a plurality of support structural units, a plurality of circumferential connecting component, and a plurality of pretightening components. The air-water isolation layer is spirally wound on the outer surface of the splicing support structural body from top to bottom and located between the outer surface of the splicing type support structural body and the inner wall of a working well. The lap joint width of the air-water isolation layer is not smaller than the height of a single-layer support structure steel piece. The invention further provides shield cutter head overhaul working well support equipment. The device is convenient to mount and demount, reusable, capable of isolating air and water by the air-water isolation layer and effectively removing underground water by a vacuum plastic pipe water descending device, simple in structure, convenient, easy to use, economical, environmental friendly, safe and efficient, and the lateral deformation of a foundation pit wall can be controlled effectively.
Description
Technical field
The present invention relates to the supporting field of active well, particularly relate to a kind of suspension device and equipment of shield cutter service work well.
Background technology
In recent years, shield method is that urban subway tunnel is built one of most important method.In shield method tunnel construction process, usually need maintenance or change cutter (cutterhead), so the construction of shield cutter service work foundation ditch (well) is the indispensable part of shield method.Compare conventional foundation ditch, there are much features of self in shield structure service work hole (well), as relatively fixing in shield structure service work well planar dimension, for common shield structure, be generally the circle of 7 meters of left and right of diameter, the relative non-excavating construction of buried depth (horizontal orientation, push pipe) is darker, generally below 5 meters; In addition, shield structure service work hole (well) belongs to temporary supporting structure, after completing service work, will remove and backfill, if adopt traditional foundation ditch construction method, as reinforcing bar grid adds concrete shotcrete, open caisson etc., long construction period, cost is high, a lot of materials can not be recycled, and concrete supporting structure particularly, after having constructed, mostly cannot be removed completely, environment is caused to very large impact.In addition, in (well) building course of shield structure service work hole, usually run into the dissimilar underground water of Different Strata and multilayer (as interlayer backwater), according to the requirement of relevant specification, need to carry out precipitation processing, if adopt conventional precipitation method, as radial, electric osmose well etc., not only can greatly increase construction cost, cause the serious waste of underground water, and be difficult to guarantee dewatering effect.
In traditional Municipal Engineering Construction, maintenance or change cutter (cutterhead) and conventionally adopt rectangle or square foundation ditch in shield method tunnel construction, support pattern adopts the steel disc stake of cofferdam type driving into type or timber sheet piling, soil nail wall, open caisson, diaphragm wall, soil nail wall, cement earth pile etc. more.But because above-mentioned support pattern all belongs to disposable coming into operation, difficulty of construction is larger, long in time limit, construction costs is high, can not recycling, and these permanent supportings are closed on engineering also may to follow-up construction or following other and be made troubles, and current support pattern is also built a difficult problem for impact in unresolved interlayer backwater stratum on shield structure service work hole (well).
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of shield cutter service work well suspension device and equipment, easy disassembly, and energy trapping water proof, can reuse, and can solve interlayer backwater stratum and shield structure service work hole (well) be built to the problem of impact.
For solving the problems of the technologies described above, the invention provides a kind of shield cutter service work well suspension device, comprising:
Pin-connected panel supporting and protection structure body and trapping water barrier; Wherein,
Described pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit, a plurality of hoop connecting elements and a plurality of pretension member;
Described trapping water barrier from top to bottom spiral winding is arranged in described pin-connected panel supporting and protection structure external surface, between described pin-connected panel supporting and protection structure external surface and active well inwall, described trapping water barrier lap width is not less than the height of described pin-connected panel supporting and protection structure body.
The present invention also provides a kind of shield cutter service work well support apparatus, comprising:
A plurality of pin-connected panel supporting and protection structure bodies, a plurality of vertical connecting elements and trapping water barrier; Wherein,
Described each pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit, a plurality of hoop connecting elements and a plurality of pretension member;
A plurality of pin-connected panel supporting and protection structure bodies are put by stacked installing, between each layer of pin-connected panel supporting and protection structure body, by some vertical connecting elementss, are connected to form whole loop configuration body;
Described trapping water barrier from top to bottom spiral winding is arranged in described a plurality of pin-connected panel supporting and protection structure body and forms whole loop configuration external surface, between described loop configuration body and active well inwall, the lap width of every layer of described trapping water barrier is not less than the height of every layer of described pin-connected panel supporting and protection structure body.
Beneficial effect of the present invention is: this device easy disassembly, can reuse, and by trapping water barrier, can trapping water proof.It is simple in structure, facilitate easy-to-use, economic environmental protection, can effectively control the lateral deformation of foundation pit walls.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the suspension device that Fig. 1 provides for the embodiment of the present invention;
The supporting and protection structure cell schematics of the suspension device that Fig. 2 provides for the embodiment of the present invention;
The cushion block schematic diagram of the suspension device that Fig. 3 provides for the embodiment of the present invention;
The hoop connecting elements schematic diagram of the suspension device that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is that A-A in Fig. 4 is to sectional view;
Fig. 6 is the enlarged diagram that the B in Fig. 4 is ordered;
The vacuum-dewatering device schematic diagram of the suspension device that Fig. 7 provides for the embodiment of the present invention;
The plastics well-point pipe schematic diagram of the vacuum-dewatering device of the suspension device that Fig. 8 provides for the embodiment of the present invention
The structural representation of the support apparatus that Fig. 9 provides for the embodiment of the present invention.
The specific embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
Embodiment mono-
The present embodiment provides a kind of shield cutter service work well suspension device, and as shown in Figure 1, this device comprises: pin-connected panel supporting and protection structure body and trapping water barrier;
Wherein, pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit 1, a plurality of hoop connecting elements 3 and a plurality of pretension member 2;
Trapping water barrier 4 is arranged on described pin-connected panel supporting and protection structure external surface by the mode of spiral winding, between described pin-connected panel supporting and protection structure external surface and active well inwall, the lap width of trapping water barrier 4 is not less than the height of pin-connected panel supporting and protection structure body.
In the pin-connected panel supporting and protection structure body of above-mentioned suspension device, supporting and protection structure unit is six, and as shown in Figure 2, each supporting and protection structure unit is welded by arc steel plate 13, a plurality of cushion block 11 and curved steel tube 12; Described curved steel tube 12 is connected on the middle part of described arc steel plate 13 inner sides by described a plurality of cushion block 11 pad welding equipments.
In above-mentioned supporting and protection structure unit, arc steel plate adopts Q235 carbon structure steel disc, and its arc length is 3900mm, and thickness is 4mm, and height is 200mm, and its radius of curvature is 3748mm, and corresponding central angle is 59.62 °, and steel disc flexibility is 12.72%;
Curved steel tube adopts Q235 steel pipe, and arc length is 3600mm, and its external diameter is 60mm, and wall thickness is 9mm, and its radius of curvature is 3676mm, and corresponding central angle is 56.11 °, and flexibility of steel pipe is 12.00%, and steel pipe two ends are provided with bolt hole 14, are of a size of 22 * 18mm;
As shown in Figure 3, steel cushion block adopts 60mm * 60mm * 40mm cube.As shown in Fig. 4～6, in the pin-connected panel supporting and protection structure body of above-mentioned suspension device, hoop connecting elements is four, each hoop connecting elements consists of sleeve 22 and two screw rods 21,23 that are threaded connection at described sleeve two ends, and the free end of described each screw rod 21,23 is provided with the bolt hole 24 that connects described supporting and protection structure unit.
In the pin-connected panel supporting and protection structure body of above-mentioned suspension device, pretension member is two, each pretension member consists of sleeve and two screw rods that are threaded connection at described sleeve two ends, and the free end of described each screw rod is provided with the bolt hole that connects described supporting and protection structure unit.The structure of pretension member is identical with hoop connecting elements, but using method is different.Can be with reference to Fig. 4.
As shown in Figure 7, above-mentioned suspension device also comprises: vacuum-dewatering device comprises: the unit (not shown) of drawing water, plastics well-point pipe 51, tube connector 53,55 and water header 52,54; Wherein, it is external that described plastics well-point pipe 51 is vertically arranged on described pin-connected panel supporting and protection structure, described water header 52,54 ringwise, it is inner and/or outer that horizontal circle is arranged on described pin-connected panel supporting and protection structure body, and described water header 52,54 is connected with described plastics well-point pipe 51 by described tube connector 53,55; The described unit that draws water is connected with described water header 52,54;
As shown in Figure 8, described plastics well-point pipe 51 is formed by connecting through threeway parts 513 by two parts pipeline section 511,512, each pipeline section from top to bottom by common pipeline section 5111, be provided with a plurality of through holes and at the fillter section 5112 of the coated filtration beds of described through hole external surface and the precipitating phase 5113 that is not communicated with outside, form (corresponding, the pipeline section 512 of bottom by common pipeline section 5121, be provided with a plurality of through holes and be coated the fillter section 5122 of filtration beds and the precipitating phase 5123 not being communicated with outside forms at described through hole external surface).
Below in conjunction with the drawings and specific embodiments, above-mentioned suspension device is described further:
Shield cutter service work well suspension device of the present invention, can solve the problem to groundwater control in shield cutter service work well supporting and construction.
This suspension device consists of pin-connected panel supporting and protection structure body and the trapping water barrier of steel work, and pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit, a plurality of hoop connecting elements and a plurality of pretension member, detachably reuses.
Pin-connected panel supporting and protection structure body has 6 supporting and protection structure unit to be connected to form the similar round of sealing, first by 4 hoop connecting elementss, 5 supporting and protection structure unit are connected, then between 3 supporting and protection structure unit that in the end connect, 2 pretension members have been laid, after 6 installations, adjust pretension member, make structure and foundation ditch inwall closely connected, and apply the circumference stress that can offset self gravitation simultaneously.Specific as follows:
(1) supporting and protection structure unit:
This suspension device is applicable to the Circular Pit that diameter is the dark 8～9m of 7.5m, and hoop adopts 6 standard steel construction supporting and protection structure unit splicings to form.The supporting and protection structure unit of steel work is by arc steel plate, cushion block and the curved steel tube (see figure 2) that is welded, wherein, arc steel plate adopts Q235 structural carbon steel, its arc length is 3900mm, thickness is 4mm, and height is 200mm, and its radius of curvature is 3748mm, corresponding central angle is 59.62 °, and steel disc flexibility is 12.72%; Curved steel tube adopts Q235 steel pipe, and arc length is 3600mm, and its external diameter is 60mm, and wall thickness is 9mm, and its radius of curvature is 3676mm, and corresponding central angle is 56.11 °, and flexibility of steel pipe is 12.00%, and steel pipe two ends are provided with bolt hole, are of a size of 22 * 18mm; Cushion block structure as shown in Figure 3, is a kind of cubical steel cushion block, facilitates curved steel tube end to be connected with hoop connecting elements, and adjacent two corresponding central angles of steel cushion block are 9.94 °, and the distance of end steel cushion block distance steel panel edges is 325mm.The weight of each supporting and protection structure unit is 72kg.
(2) hoop connecting elements:
In order to make as far as possible closely to connect between two supporting and protection structure unit, in this suspension device, take hoop connecting elements to connect, hoop connecting elements mainly forms (as shown in Figure 4) by sleeve and two screw rods that are connected to sleeve two ends, and the free end of each screw rod is provided with bolt hole.By hoop connecting elements, realized being threaded connection between two supporting and protection structure unit like this and added the fixing mode of bolt and connect, be threaded and can facilitate the connection between arc steel plate, fixing displacement, rotation with in surface and the torsion that can retrain supporting and protection structure unit tie point of bolt.Between the curved steel tube that hoop supports and the screw rod of hoop connecting elements, be bolted, the circular hole of outputing Ф 18mm of correspondence on screw rod, is then bolted the curved steel tube end of screw rod and supporting and protection structure unit.
Through strength checking, the bolt that determine to connect the curved steel tube of supporting and protection structure unit can adopt that specification is that d=M16, nominal length are that 100mm, properties of product grade are 10.9, surface oxidation, product hierarchy are the hexagon-headed bolt of A level, note: GB/T5782-2000-M15*100-10.9A-O.
The size of screw thread designs according to GB/T5796.1-1986.Thread type is chosen as the trapezoidal thread that nominal diameter is 52mm, and pitch is 8mm, and height of thread is 4.5mm, and thread crest and tooth bottom width are 2.79mm, and form of thread angle is 30 °, and screw thread is labeled as Tr52 * 8(trapezoidal thread, diameter 52, pitch 8).The large footpath 52mm of external screw thread, external screw thread path 43mm, the large footpath 53mm of internal thread, internal thread path 44mm.Through checking computations, screw rod can meet strength and stability requirement in member normal operation, and ridge intensity also meets the demands, and screw thread can keep self-locking under dead load effect.
(3) pretension member:
After installing 6 supporting and protection structure unit, also remain the gap that has 149mm, in order to allow pin-connected panel supporting and protection structure body can become a circular configuration complete and that can independently bear external load, the device of an energy pretension need to be installed at steel work gap location, make structure and foundation ditch inwall closely connected, this structure is called to pretension member.The size of pretension member is consistent with the selection of screw thread and hoop connecting elements, and just using method is different, and hoop connecting elements is that member is screwed, and pretension member is the effect of pretension of playing by member is unscrewed.
(4) trapping water barrier:
At arranged outside one deck trapping water barrier of pin-connected panel supporting and protection structure body, it can play the effect of trapping water proof.
(41) effect:
Water proof vapour barrier adopts asperities geomembrane, this material has water proof trapping effect, water-resisting property can prevent in foundation ditch current direction foundation ditch around, to guarantee easy construction and construction safety, gas barrier properties can be by shield structure inspection-pit and soil layer isolation, avoid the loss of vacuum, to increase vacuum-dewatering effect.
(42) feature:
This asperities geomembrane has the characteristics such as higher friction factor, lower transmission coefficient, mechanical strength are high, easy construction, environment-protecting asepsis.Crude surface can increase friction factor, and the frictional force between structural support layer and soil layer is increased, and improves the stability of structure; There is good mechanical strength, good elasticity and deformability.
(43) construction method:
(43a) complete but do not apply before pretightning force in pin-connected panel supporting and protection structure body assembling, the asperities geomembrane as trapping water barrier is layered between supporting and protection structure layer and active well inwall, from well head downwards along the coiling of active well spiral inner wall, outside structure one week;
(43b) after winding, apply pretightning force, obtain trapping water barrier.
(5) vacuum-dewatering device:
Vacuum-dewatering is mainly suitable for silt or clay stratum, and water content is little, if adopt conventional precipitation, does not reach dewatering effect.
The design of vacuum-dewatering device is the principle that adopts aspiration vacuum, changes the matric potential in the soil body on the one hand, makes to reduce near the matric potential of the borehole wall, forms difference with the soil body in certain limit, and water is migrated, and flows in well; On the other hand, for the capillarity because of the soil body, be bound in the moisture in hole, because vacuum has changed the size of matric suction, destroyed the stress balance state in the soil body, therefore cause this part weak binding water to flow out, reached the object of draining.
Vacuum-dewatering device is by the unit that draws water, plastics well-point pipe, tube connector, water header etc. be partly formed by connecting (referring to Fig. 7,8).
(51) unit that draws water:
The unit that draws water is comprised of vacuum pump, moisture separator, centrifugal pump.
(52) plastics well-point pipe, tube connector and water header:
Plastics well-point pipe 51 is comprised of upper tubular section 511 and lower tubular section 512 two parts, and upper and lower two parts connect with plastic three-way 513.Every part is respectively common tube 5111, filter pipe 5112 and sediment tube 5113 from top to bottom and forms.6.0 meters of upper length, 3.7 meters of common pipe ranges, chimney filter is long 2 meters, 0.3 meter of precipitation pipe range, for 5.5 meters of drawdowns with interior underground water; Lower length is 4 meters, 1.7 meters of common pipe ranges, long 2 meters of chimney filter, 0.3 meter of precipitation pipe range, the underground water that is greater than 5.5 meters for drawdown degree.Well-point pipe diameter 32mm, wall thickness 2.5mm, on filter pipe, filter opening is quincunx distribution, and diameter is 8mm, and chimney filter twines geotextiles filter screen outward, with iron wire, ties up firmly, and all shut upper and lower two-part sediment tube bottom.Plastics well-point pipe 51 is arranged on outside pin-connected panel supporting and protection structure body 10, and plastics well-point pipe 51 is laid in the position of outer 0.2 meter of active well, circularizes laying.Su Liao Bowl point pipe 51 organigrams are as Fig. 8.
Water header is divided into water header 52 and lower water header 54, water header external diameter 63mm, and wall thickness 5mm, establishes a joint being connected with well-point pipe in tube wall one side every 1～2m, between two pipes, by Three-way Union, connects.Water header has certain radian, to facilitate it to be connected with plastics well-point pipe 51.
Plastics well-point pipe 51 is connected by tube connector 53,55 with water header 52,54, and tube connector 53,55 adopts reinforcement hose.Tube connector is divided into tube connector and lower tube connector.Fig. 7 is shown in connection between plastics well-point pipe 51, tube connector 53,55 and water header 52,54.
The different soil body conditions of laying quantity basis and the moisture situation of plastics well-point pipe 51 are tried to achieve as calculated.
(53) moisture separator:
The effect of moisture separator is by the moisture of extracting out from down-hole and air separation, conventionally moisture separator is connected with water header, vacuum pump is connected with moisture separator respectively with centrifugal pump again, and moisture separator adopts gravity sedimentation type principle herein, arranges one.
(54) sealing of junction:
Between upper tubular section 511 and lower tubular section 512, adopt screw thread threeway to connect, be wound around unsintered tape, outer painting fluid sealant.The sealing that is connected between tube connector and plastics well-point pipe and water header adopts iron wire that joint banding is improved to its sealing, is connected, and uses iron wire tighten, assurance sealing between vacuum pump and water header with rubber neck.Under connecting, in water header and well-point pipe process, need to penetrate water proof vapour barrier, therefore herein for guaranteeing the integrality of water proof vapour barrier, need the clay of backfill densification, and with fluid sealant, Polypropylence Sheet is bonded to opening part.
(55) pore-forming and equipment connection:
Adopt water jetting pore-forming, 0.2 meter, wellhole center to center distance active well border, the degree of depth of punching is greater than the 0.5m of desired depth, is used for offsetting the impact of the stone of slump on plastic pipe.First connect plastics well-point pipe, then threeway is sealed up, will mould material Bowl point pipe and put into boring after pore-forming, really protect the centre position of Bowl point Guan Kong, have a side of three ports towards active well center, Bowl point pipe is wanted 0.2 meter above ground level.Backfill filtrate, will be used clay to seal apart from the distance of ground 1m, guarantees certain vacuum.After moulding material Bowl point pipe and laying, ground face connect connect Bowl point manage, on water header and the unit that draws water, carry out precipitation.When cutting depth is less than 5.5 meters, only use the said equipment precipitation; If cutting depth is greater than 5.5 meters, when being excavated to underground 5.8 meters of, connecting and connect Bowl point pipe, lower water header, the unit that draws water, the unit that will draw water is arranged on foundation ditch inner side and carries out precipitation, and excavate and the unit that sinks to drawing water on limit, until excavation is to designated depth.
(56) whole pump process is expressed as follows:
Utilize vacuum pump aspiration vacuum, vacuum forms certain head difference in the soil body, under head difference effect, moisture in the soil body enters plastics well-point pipe by treatment hole, in plastics well-point pipe, effect due to vacuum, the air pressure on liquid level top is lower than the standard atmospheric pressure on earth's surface, form certain pressure reduction, according to Bernoulli Jacob's fluid law, moisture flows into water header along plastics well-point pipe, after circulating, in aqueous vapor separator, water separation is discharged, by the continuous draining for a long time of centrifugal pump, just can guarantee that foundation ditch water content drops to below the safety value of requirement.
Embodiment bis-
As shown in Figure 9, the present embodiment provides a kind of shield cutter service work well support apparatus, comprising:
A plurality of pin-connected panel supporting and protection structure bodies 81, a plurality of vertical connecting elements 82 and trapping water barrier 83; Wherein,
Described each pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit 81, a plurality of hoop connecting elements 85 and a plurality of pretension member 84;
A plurality of pin-connected panel supporting and protection structure bodies are put by stacked installing, between each layer of pin-connected panel supporting and protection structure body, by some vertical connecting elementss 82, are connected to form whole loop configuration body;
Described water proof vapour barrier 83 from top to bottom spiral winding is arranged in described a plurality of pin-connected panel supporting and protection structure body and forms whole loop configuration external surface, between described loop configuration body and active well inwall, the lap width of every layer of described trapping water barrier is not less than the height of every layer of described pin-connected panel supporting and protection structure body.Trapping water barrier is arranged on described a plurality of pin-connected panel supporting and protection structure body and forms between whole loop configuration body and active well inwall, from well head, along active well spiral inner wall, coil downwards, between geomembrane is upper and lower two-layer, lap width is not less than individual layer supporting and protection structure steel disc height, and trapping water barrier whole height should be greater than the height of supporting and protection structure.
The structure of each pin-connected panel supporting and protection structure body in this support apparatus is identical with the pin-connected panel supporting and protection structure body in embodiment mono-, all to be formed by connecting by six supporting and protection structure unit, four hoop connecting elementss and two pretension members, can, with reference to embodiment mono-, at this, no longer repeat.
Trapping water barrier in this support apparatus is all consistent with trapping water barrier structure, function, material in embodiment mono-, no longer repeat specification.Different is while trapping water barrier being set in construction, according to the following steps:
(a) excavation active well, assembled first floor supporting and protection structure body.At first floor pin-connected panel supporting and protection structure body, assemble complete but do not apply before pretightning force, trapping water barrier is arranged between pin-connected panel supporting and protection structure body and active well inwall, from well head, along active well spiral inner wall, coil downwards, between geomembrane is upper and lower two-layer, lap width is not less than individual layer supporting and protection structure steel disc height, and trapping water barrier whole height should be greater than the height of supporting and protection structure.Around the external side of described assembling supporting construction one week;
(b) after within one week, being wound around, apply pretightning force, continue assembled supporting and protection structure body below;
(c) assembling supporting construction body limit in limit excavation limit is wound around by above-mentioned winding method.
(d) repeat (c) step, until set up trapping water barrier.
In above-mentioned support apparatus, the structure of vertical connecting elements is: vertical joint steel pipe and fastener; By adopting vertical joint steel pipe that every layer of pin-connected panel supporting and protection structure body coupled together.Every adjacent three layers of pin-connected panel supporting and protection structure body are connected by scaffold clasp by vertical joint steel pipe; According to actual installation situation, every layer of even structure installed 12 vertical joint steel pipes, the installation of will staggering mutually between each layer of pin-connected panel supporting and protection structure body.The vertical long 600mm of joint steel pipe, external diameter 60mm, internal diameter 42mm.After connection, make whole support apparatus there is good structural stability.
Wherein, the scaffold that connects vertical joint steel pipe to clasp select can for external diameter be 60mm steel pipe to clasp, fastener mechanical property should meet the related request (General Administration of Quality Supervision, Inspection and Quarantine o of the People's Republic of China of < < steel tube scaffold clasp > > (GB15831-2006), Standardization Administration of China, 2006).
A plurality of cushion blocks are set in the supporting and protection structure unit of every layer of pin-connected panel supporting and protection structure body between arc steel plate and curved steel tube, can be so that vertical connecting elements be installed, the curved steel tube that makes scaffold clasp can well catch hoop to support, by the cushion block arranging, increase the Installation Flexibility of vertical connecting elements, also strengthened integrally-built rigidity.
This support apparatus overall structure and mounting method are as follows:
First by hoop connecting elements, the supporting and protection structure unit of same layer is connected into an individual layer pin-connected panel supporting and protection structure body that can independently bear external load, then by vertical connecting elements, each individual layer pin-connected panel supporting and protection structure body is connected into overall structure, make it have larger rigidity, good stability, can be good at resisting external load.
When every layer of independent pin-connected panel supporting and protection structure body is installed, first 5 supporting and protection structure unit are coupled together by four hoop connecting elementss, remaining two pretension members are screwed into the tightest state, insert respectively on the supporting and protection structure unit having connected, then put the 6th supporting and protection structure unit, then, by two people, revolve pretension member simultaneously, make it elongated, finally make structure connect into as a whole.Between each layer, will stagger mutually in the installation site of pretension member.In aggregates by vertical connecting elements connection between each layer of pin-connected panel supporting and protection structure body, every adjacent three layers of pin-connected panel supporting and protection structure body are connected by scaffold clasp by vertical joint steel pipe; According to actual installation situation, every layer of even structure installed 12 vertical joint steel pipes, the installation of will staggering mutually between each deck.
This support apparatus also arranges vacuum-dewatering device, and the structure of this vacuum-dewatering device is identical with vacuum-dewatering apparatus structure and set-up mode that Fig. 7,8 in above-described embodiment one illustrates, can, with reference to the description of embodiment mono-, at this, no longer repeat.
Support apparatus of the present invention, can apply prestressing force to every layer of independent pin-connected panel supporting and protection structure body, make it that small outside expansion occur on hoop, thereby make support apparatus and foundation pit walls closely connected, increased the frictional force between trapping water barrier and foundation pit walls, change passive protecting is active support, can effectively control the lateral deformation of foundation pit walls; Trapping water barrier adopts asperities geomembrane, it is a kind of trapping water proof material, there is certain elasticity and tensile strength, at the outside of steelframe supporting and protection structure spiral winding, just can, by the water resistance in stratum every outside supporting and protection structure, can increase again the dewatering effect of vacuum-dewatering device.This support apparatus has the advantages such as safe and efficient, quick for installation, easy construction, economic environmental protection.Can significantly reduce the duration, by the pretension of supporting and protection structure, can effectively reduce the displacement of hole wall; Adopt trapping water barrier, not only can increase the dewatering effect of vacuum-dewatering device, and can guarantee that anhydrous operation makes construction safer; The vacuum-dewatering device adopting, can reach the advantages such as better dewatering effect.
The above; be only the present invention's specific embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. a shield cutter service work well suspension device, is characterized in that, comprising:
Pin-connected panel supporting and protection structure body and trapping water barrier; Wherein,
Described pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit, a plurality of hoop connecting elements and a plurality of pretension member;
Described trapping water barrier from top to bottom spiral winding is arranged in described pin-connected panel supporting and protection structure external surface, between described pin-connected panel supporting and protection structure external surface and active well inwall, described trapping water barrier lap width is not less than the height of described pin-connected panel supporting and protection structure body.
2. device according to claim 1, is characterized in that, described supporting and protection structure unit is six, and each supporting and protection structure unit is welded by arc steel plate, a plurality of cushion block and curved steel tube; Described curved steel tube is connected on the middle part of described arc steel plate inner side by described a plurality of cushion block pad welding equipments.
3. device according to claim 2, is characterized in that, described arc steel plate adopts Q235 carbon structure steel disc, its arc length is 3900mm, and thickness is 4mm, and height is 200mm, its radius of curvature is 3748mm, and corresponding central angle is 59.62 °, and steel disc flexibility is 12.72%;
Described curved steel tube adopts Q235 steel pipe, and arc length is 3600mm, and its external diameter is 60mm, and wall thickness is 9mm, and its radius of curvature is 3676mm, and corresponding central angle is 56.11 °, and flexibility of steel pipe is 12.00%, and steel pipe two ends are provided with bolt hole, are of a size of 22 * 18mm;
Described cushion block adopts the cube steel cushion block of 60mm * 60mm * 40mm.
4. device according to claim 1 and 2, it is characterized in that, described hoop connecting elements is four, each hoop connecting elements consists of sleeve and two screw rods that are threaded connection at described sleeve two ends, and the free end of described each screw rod is provided with the bolt hole that connects described supporting and protection structure unit.
5. device according to claim 1 and 2, it is characterized in that, described pretension member is two, and each pretension member consists of sleeve and two screw rods that are threaded connection at described sleeve two ends, and the free end of described each screw rod is provided with the bolt hole that connects described supporting and protection structure unit.
6. device according to claim 1 and 2, is characterized in that, also comprises: vacuum-dewatering device, and this vacuum-dewatering device comprises: the unit that draws water, plastics well-point pipe, tube connector and water header; Wherein,
It is external that described plastics well-point pipe is vertically arranged on described pin-connected panel supporting and protection structure, and ringwise, it is inner and/or outer that horizontal circle is arranged on described pin-connected panel supporting and protection structure body to described water header, and described water header is connected with described plastics well-point pipe by described tube connector; The described unit that draws water is connected with described water header;
Described plastics well-point pipe is formed by connecting through threeway parts by two parts pipeline section, each pipeline section from top to bottom by common pipeline section, be provided with a plurality of through holes and in the fillter section of the coated filtration beds of described through hole external surface and the precipitating phase formation not being communicated with outside.
7. a shield cutter service work well support apparatus, is characterized in that, comprising:
A plurality of pin-connected panel supporting and protection structure bodies, a plurality of vertical connecting elements and trapping water barrier; Wherein,
Described each pin-connected panel supporting and protection structure body is the loop configuration being connected into by a plurality of supporting and protection structure unit, a plurality of hoop connecting elements and a plurality of pretension member;
A plurality of pin-connected panel supporting and protection structure bodies are put by stacked installing, between each layer of pin-connected panel supporting and protection structure body, by some vertical connecting elementss, are connected to form whole loop configuration body;
Described trapping water barrier from top to bottom spiral winding is arranged in described a plurality of pin-connected panel supporting and protection structure body and forms whole loop configuration external surface, between described loop configuration body and active well inwall, the lap width of every layer of described trapping water barrier is not less than the height of every layer of described pin-connected panel supporting and protection structure body.
8. equipment according to claim 7, is characterized in that, described each pin-connected panel supporting and protection structure body is formed by connecting by six supporting and protection structure unit, four hoop connecting elementss and two pretension members; Wherein,
Each supporting and protection structure unit is welded by arc steel plate, a plurality of cushion block and curved steel tube; Described curved steel tube is connected on the middle part of described arc steel plate inner side by described a plurality of cushion block pad welding equipments; Described arc steel plate adopts Q235 carbon structure steel disc, and its arc length is 3900mm, and thickness is 4mm, and height is 200mm, and its radius of curvature is 3748mm, and corresponding central angle is 59.62 °, and steel disc flexibility is 12.72%; Described curved steel tube adopts Q235 steel pipe, and arc length is 3600m, and its external diameter is 60mm, and wall thickness is 9mm, and its radius of curvature is 3676mm, and corresponding central angle is 56.11 °, and flexibility of steel pipe is 12.00%, and steel pipe two ends are provided with bolt hole, are of a size of 22 * 18mm; Described cushion block adopts the cube steel cushion block of 60mm * 60mm * 40mm;
Each hoop connecting elements consists of sleeve and two screw rods that are threaded connection at described sleeve two ends, and the free end of described each screw rod is provided with the bolt hole that connects described supporting and protection structure unit;
Each pretension member consists of sleeve and two screw rods that are threaded connection at described sleeve two ends, and the free end of described each screw rod is provided with the bolt hole that connects described supporting and protection structure unit.
9. according to the equipment described in claim 7 or 8, described trapping water barrier adopts the asperities geomembrane with water proof trapping function.
10. according to the equipment described in claim 7 or 8, also comprise: vacuum-dewatering device, this vacuum-dewatering device comprises: the unit that draws water, plastics well-point pipe, tube connector and water header; Wherein,
It is external that described plastics well-point pipe is vertically arranged on described pin-connected panel supporting and protection structure, and ringwise, it is inner and/or outer that horizontal circle is arranged on described pin-connected panel supporting and protection structure body to described water header, and described water header is connected with described plastics well-point pipe by described tube connector; The described unit that draws water is connected with described water header;
Described plastics well-point pipe is formed by connecting through threeway parts by two parts pipeline section, each pipeline section from top to bottom by common pipeline section, be provided with a plurality of through holes and in the fillter section of the coated filtration beds of described through hole external surface and the precipitating phase formation not being communicated with outside.
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| CN201310594640.5A CN103615253B (en) | 2013-11-21 | 2013-11-21 | Shield cutter service work well suspension device and equipment |
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Effective date of registration: 20180706 Address after: 100083, No. 16, No. 16, Beijing, Zhi Xin Village, 304 Patentee after: Beijing Zhong Di Shield Engineering Technology Research Institute Co., Ltd. Address before: 100083 No. 29, Haidian District, Beijing, Xueyuan Road Patentee before: China University of Geosciences (Beijing) |
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