CN108678751A - The shield cutter inspection-pit assembly construction method excavated after first jacking - Google Patents
The shield cutter inspection-pit assembly construction method excavated after first jacking Download PDFInfo
- Publication number
- CN108678751A CN108678751A CN201810468569.9A CN201810468569A CN108678751A CN 108678751 A CN108678751 A CN 108678751A CN 201810468569 A CN201810468569 A CN 201810468569A CN 108678751 A CN108678751 A CN 108678751A
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- Prior art keywords
- inspection
- pit
- assembled
- excavated
- steel
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Abstract
The invention discloses the shield cutter inspection-pit assembly construction methods excavated after a kind of first jacking, including：Construction pretreatment；It excavates and makes assembled fore shaft coil assembly at inspection-pit；Stage excavation inspection-pit, layering setting assembled supporting construction is as borehole wall supporting in inspection-pit, until being excavated to inspection-pit shield section top layer, the then backfill earthwork to the above 3m of shield machine waits for shield machine jacking；Shield machine jacking is to inspection-pit precalculated position, earth excavation to shield section top layer again.Semi-loop of the excavation supporting far from one side region of shield since the shield section, until shaft bottom, carries out shield cutter maintenance, the assembled supporting construction removed in inspection-pit is layered from bottom to top after the completion of shield cutter maintenance, follow-up backfill waits for that shield machine continues to tunnel after the completion of all backfilling.This method makes inspection-pit construction speed improve, noresidue in the soil body, pollution-free, will not be impacted to Other Engineering, safe, and construction cost is low.
Description
Technical field
The present invention relates to the shield cutter inspections excavated after the inspection-pit construction field of shield more particularly to a kind of first jacking
Well workover assembly construction method.
Background technology
In the constructions such as current tunnel, subway, it is required to use shield technique.In existing shield-tunneling construction, need applying
It needs to overhaul shield cutter during work, shield cutter is overhauled at present, to be spaced on the route excavated
Inspection-pit is set.But current shield cutter inspection-pit, after excavation, the borehole wall is all made of concreting molding, shield cutter
After maintenance, when preparation backfills inspection-pit, since concrete walling is firmer, and it can not be removed from soil and recycling concrete
The borehole wall is had to stay in soil, and to being backfilled, being caused in this way with soil in inspection-pit well the problem of is：Due to concrete walling
It stays in soil, the construction of follow-up Other Engineering can be adversely affected, not only feature of environmental protection difference and low construction efficiency.Meanwhile
The mode that standard-sized sheet is dug at present, can if first excavating the shield section of inspection-pit if encountering soil structures special the case where should not excavating
The problem of influencing inspection-pit construction speed.And in the maintenance well construction carried out with concrete, the especially engineerings such as city underground,
Due to Job Operations narrow space, operating environment is complicated, construction machinery type is various, easily operating personnel is damaged and by
The more influences for closing on risk source such as pipeline is intensive, are also not easy to safe construction.Therefore, inventor discover how can efficiently,
Pollution-free and safe carry out shield cutter maintenance well construction is problem to be solved.
Invention content
Based on the problems of prior art, the object of the present invention is to provide the shield cutters excavated after a kind of first jacking
Inspection-pit assembly construction method when encountering that soil structures are special to be excavated can ensure construction efficiency, reduce and be constructed into
This, and effectively reduce and pollute and influence Other Engineering caused by concrete that inspection-pit apply is not recyclable the soil body and construct
The problems such as.
The purpose of the present invention is what is be achieved through the following technical solutions：
Embodiment of the present invention provides the shield cutter inspection-pit assembly construction method excavated after a kind of first jacking, packet
It includes：
Construction pretreatment is carried out in the position of setting inspection-pit；
Assembled fore shaft coil assembly is made at inspection-pit excavating；
In the corresponding inspection-pit position stage excavation inspection-pit of the assembled fore shaft coil assembly, in the inspection-pit excavated
Borehole wall supporting of the interior layering setting assembled supporting construction as the inspection-pit, until the inspection-pit is excavated to the inspection-pit
At the top of shield section；
Shield machine has excavated the predetermined maintenance position of beneath portions into hole and jacking to the inspection-pit；
The processing of half excavation：Region is excavated using a side region of the shield section of inspection-pit far from shield machine direction as half, separately
Half region is shield machine position, excavates region stage excavation from top to bottom described half, and be layered setting assembled branch
Protection structure excavates the borehole wall supporting in region as half, until being excavated to the maintenance position of the inspection-pit, is assembled in bottom assembly
Formula steel back cover；
After the completion of half excavates, shield cutter maintenance is carried out, layering removes and recycles the inspection after the completion for shield cutter maintenance
Assembled supporting construction in well workover, follow up backfilling of earthwork, and shield machine continues to dig after whole backfilling of earthwork are completed to restore landforms
Into i.e. completion half backfills formula shield cutter inspection-pit fabricated construction.
As seen from the above technical solution provided by the invention, the shield excavated after first jacking provided in an embodiment of the present invention
Structure cutterhead inspection-pit assembly construction method, advantage are：
By using stage excavation inspection-pit from top to bottom, and the layering setting dress from top to bottom in the inspection-pit excavated
Borehole wall supporting with formula supporting construction as the inspection-pit, with digging with branch, closing cyclization is strong, and speed of application is fast, is filled after use
It is recyclable with formula supporting construction, subsequent construction cost is reduced, after the completion of construction, noresidue in the soil body will not cause dirt to the soil body
Dye is avoided using the expendable concrete for making inspection-pit borehole wall, easily cause soil pollution, influence Other Engineering construction etc.
Problem；In particular, in inspection-pit shield section using the jacking of shield machine elder generation to predetermined maintenance position, then in such a way that half excavates,
It is convenient that in the soil body that should not be excavated, inspection-pit is set, realize that cutter head of shield machine repair or cutter head of shield machine damage in precalculated position,
Which construction inspection-pit can be used to overhaul cutter head of shield machine, meanwhile, the present invention in inspection-pit shield section to using half
It excavates, shoveling amount is few, improves efficiency, can also reduce the backfilling working amount in inspection-pit work progress, improves inspection-pit and builds
Speed.Moreover, because to be related to equipment relatively fewer for the construction method, it, also can be more in the case that risk source is more at the construction field (site)
Good guarantee working security.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the shield cutter inspection-pit assembly construction method flow excavated after first jacking provided in an embodiment of the present invention
Figure；
Fig. 2 is the structural plan schematic diagram of the inspection-pit routine section in construction method provided in an embodiment of the present invention；
Fig. 3 is A-A in Fig. 2 to diagrammatic cross-section；
Fig. 4 is the B-B direction diagrammatic cross-section in Fig. 2；
Fig. 5 is the structural plan schematic diagram of the inspection-pit shield section in construction method provided in an embodiment of the present invention；
Fig. 6 is that assembled support construction walks sequence schematic diagram in construction method provided in an embodiment of the present invention；
Fig. 7 is the floor map of assembled fore shaft coil assembly in construction method provided in an embodiment of the present invention；
Fig. 8 is each sub- girder construction schematic diagram of steel waist rail in construction method provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of each wavelet card of corrugated plating in construction method provided in an embodiment of the present invention；
In Fig. 2,3,4 and 5：The conventional section of 1- inspection-pits；The shield section of 2- inspection-pits；The shield jacking area of 3- shield sections
Domain；31- steel waist rails；The first sub- beams of 311-；The second sub- beams of 312-；The sub- beam of 313- thirds；The 4th sub- beams of 314-；The 5th sons of 315-
Beam；316- steel waist rail connectors；32- inner support members；The first support bases of 321-；The second support bases of 322-；33- corrugated platings； 34-
Longitudinal connecting member；The longitudinally connected columns of 35-；C- shield machine jackings direction；4- slip casting tubules；
In Fig. 7：21- concrete collar tie beams；22- prefabricated steel collar tie beams；23- prefabricated steel collar tie beam channel steels；24- weld seams；25- spiral shells
Keyhole；26- well head guardrails；
In Fig. 8：310- strip bolts hole；317- cutting openings；
In Fig. 9：330- corrugated platings；331- strip nose ends；332- connection nose ends；333,335- ribbed panels；334,336- thousand
Jin top card slot.
Specific implementation mode
With reference to the particular content of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
Belong to protection scope of the present invention.The content not being described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field
The well known prior art.
As shown in Fig. 1 to 5, the embodiment of the present invention provides the shield cutter inspection-pit assembled excavated after a kind of first jacking and applies
Work method, including：
Construction pretreatment is carried out in the position of setting inspection-pit；Preferably, the pretreatment includes：To the position of inspection-pit is arranged
Set and periphery place carry out it is smooth, it is smooth after the completion of setting enclosing and facing build, and access water, electricity and introducing device therefor；
As shown in Fig. 1 to 5, the embodiment of the present invention provides the shield cutter inspection-pit assembled excavated after a kind of first jacking and applies
Work method, including：
Construction pretreatment is carried out in the position of setting inspection-pit；
Assembled fore shaft coil assembly is made at inspection-pit excavating；
In the corresponding inspection-pit position stage excavation inspection-pit of the assembled fore shaft coil assembly, in the inspection-pit excavated
Borehole wall supporting of the interior layering setting assembled supporting construction as the inspection-pit, until the inspection-pit is excavated to the inspection-pit
At the top of shield section；
Shield machine has excavated the predetermined maintenance position of beneath portions into hole and jacking to the inspection-pit；
The processing of half excavation：Region is excavated using a side region of the shield section of inspection-pit far from shield machine direction as half, separately
Half region is shield machine position, excavates region stage excavation from top to bottom described half, and be layered setting assembled branch
Protection structure excavates the borehole wall supporting in region as half, until being excavated to the maintenance position of the inspection-pit, is assembled in bottom assembly
Formula steel back cover；
After the completion of half excavates, shield cutter maintenance is carried out, layering removes and recycles the inspection after the completion for shield cutter maintenance
Assembled supporting construction in well workover, follow up backfilling of earthwork, and shield machine continues to dig after whole backfilling of earthwork are completed to restore landforms
Into i.e. completion half backfills formula shield cutter inspection-pit fabricated construction.
In above-mentioned construction method, include excavating making assembled fore shaft coil assembly (structure is referring to Fig. 7) at inspection-pit：
Step 1) cast-in-place concrete collar tie beam：
The earthwork within the scope of collar tie beam is excavated at inspection-pit, construction cushion coat, installation pre-embedded steel slab, formwork supporting plate, pours at assembling reinforcement
It builds collar tie beam concrete and concrete collar tie beam is made；
Step 2) assembly prefabricated steel：
Installation prefabricated steel forms prefabricated steel collar tie beam on the concrete collar tie beam made of pour, by prefabricated steel collar tie beam with
Pre-embedded steel slab welding on concrete collar tie beam, when welding, are fixed by the way of full weld, that is, complete assembled fore shaft circle system
Make；
Step 3) installs well head guardrail：Preferred well head guardrail is using assembled corrugated plating baffle walls；
Assembled corrugated plating baffle walls or steel guard rail are set on prefabricated steel collar tie beam as well head guardrail, that is, assembled is made
Fore shaft coil assembly.
Alternatively,
In the method, include excavating making assembled fore shaft coil assembly at inspection-pit：
Step 1) is laid with bed course：
It is being laid with bed course in inspection-pit position；
Step 2) assembly prefabricated steel：
Prefabricated steel is fixedly mounted on the bed course of laying and forms prefabricated steel collar tie beam, that is, completes assembled fore shaft circle system
Make；
Step 3) installs well head guardrail：
Steel guard rail is set on prefabricated steel collar tie beam as well head guardrail, that is, assembled fore shaft coil assembly is made.
This assembled fore shaft coil assembly without concrete for making concrete collar tie beam is more convenient to remove and recycle when backfill
It uses, lifting construction speed also reduces pollution without concrete.
In above-mentioned construction method, in the corresponding inspection-pit position stage excavation inspection-pit of the assembled fore shaft coil assembly,
Borehole wall supporting of the layering setting assembled supporting construction as the inspection-pit in the inspection-pit excavated, until the inspection-pit
It is excavated at the top of the shield section of the inspection-pit and is：
(1) when stage excavation inspection-pit, first of waist rail is set up after carrying out earth excavation, with connector by first of waist rail
It is connect with the prefabricated steel collar tie beam of assembled fore shaft coil assembly, after first of waist rail closing cyclization, by first of waist rail and in advance
Steel plate collar tie beam processed is bolted connection；
(2) after setting up first layer waist rail, continue to excavate the soil body, every layer of cutting depth is equal to or more than the width of one layer of corrugated plating
Degree sets up one layer of corrugated plating below first of waist rail, this layer of corrugated plating is connect fastening with first of waist rail above it, on
Under adjacent one layer of steel waist rail and one layer of corrugated plating form a Pin assembled supporting construction；
(3) assembled lower one of waist rail, the roads Bing Jianggai waist rail are connect with the corrugated plating for the closing cyclization that top assembly is completed, phase
The assembled seam of adjacent twice road waist rail is staggered, and the assembled seam of adjacent twice corrugated plating is staggered；
(4) inner support is set up in every Pin assembleds supporting construction；
Work progress later repeats (3), (4) step, until the inspection-pit is excavated to the shield section top of the inspection-pit
Portion.
Specifically, borehole wall supporting of the layering setting assembled supporting construction as the inspection-pit in the inspection-pit excavated
The step of it is as follows：
Step 1) earth excavation depth is 0.5m, and first layer waist rail is set up after inspection-pit earth excavation, will with connector
First layer waist rail connect with the prefabricated steel collar tie beam of assembled fore shaft coil assembly and is attached, by preload piece by first layer steel waist
Beam is strutted and is put in place, and is bolted each sub- beam of steel waist rail connector and first layer steel waist rail with bolt, and by first layer waist
Beam connect with the prefabricated steel collar tie beam of assembled fore shaft circle and is bolted connection；
After step 2) sets up first layer waist rail, one layer of corrugated plating is set up on the borehole wall of inspection-pit after excavation, by this layer of wave
Card is hung on first layer steel waist rail, is strutted adjacent two pieces of corrugated platings with preload piece, with connector that this layer of corrugated plating is tight
It is solidly connected, and corrugated plating and first of steel waist rail is bolted connection, neighbouring one layer of steel waist rail and one layer of ripple
Board group is at a Pin assembled supporting construction；
Step 3) sets up inner support member in every Pin assembleds supporting construction；
Subsequent construction process repeats that each layer assembled supporting construction is arranged from top to bottom successively in the way of above-mentioned steps, directly
It is excavated at the top of the shield section of the inspection-pit to the inspection-pit.
In above-mentioned construction method, in process of the layering setting assembled supporting construction as the borehole wall supporting of the inspection-pit
In, the longitudinal short column of connection one on two waist rails at the both ends in every 1m, and set up two layers of inner support；It (can also root per 1.5m
Other slip casting distances, such as 2m are chosen according to soil layer state) in corrugated plating backfill slip casting behind；It (can also be according to soil layer shape per 3m
State chooses other slip casting distances, such as 2m or 3.5m) in both ends two waist rails on connect a longitudinal connecting member.
In above-mentioned construction method, longitudinal connecting member uses channel steel, by the steel of six longitudinally adjacent Pin assembled supporting construction
Waist rail connects together.
As shown in Fig. 2 to 5, in above-mentioned construction method, the layering setting assembled supporting construction in the inspection-pit excavated
Borehole wall supporting as the inspection-pit includes：
In the conventional section of excavated inspection-pit, the more Pin routines formula assembled supportings of layering setting in the inspection-pit excavated
Borehole wall supporting of the structure as the inspection-pit；
In the changeover portion of excavated inspection-pit, the more Pin transition types assembled supportings of layering setting in the inspection-pit excavated
Borehole wall supporting of the structure as the inspection-pit；
In the shield section of excavated inspection-pit, the more Pin shield types assembled supportings of layering setting in the inspection-pit excavated
Borehole wall supporting of the structure as the inspection-pit.
In above-mentioned assembled supporting construction, include per Pin conventional type assembled supporting construction：Steel waist rail, corrugated plating, interior branch
Support member and multiple connectors；Wherein, the steel waist rail is and the matched loop configuration of borehole wall shape in underground shaft；
The corrugated plating be and the matched loop configuration of borehole wall shape in underground shaft；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector, connector is excellent
Choosing uses bolt；
The inner support member is located in the steel waist rail, and the both ends of the inner support member are supported on the support base, can be right
The waist rail is pre-tightened；
In above-mentioned assembled supporting construction, the height for the Pin assembled supporting construction that waist rail and corrugated plating collectively constitute is
0.5~0.75 meter.
In above-mentioned assembled supporting construction, steel waist rail is cirque structure or oval ring structure；
The corrugated plating is cirque structure or oval ring structure；
The steel waist rail is identical as the shape of the corrugated plating.
In above-mentioned assembled supporting construction, steel waist rail is formed by connecting by multiple sub- beams through steel waist rail connector；
The multiple sub- beam includes：(that illustrates in such as Fig. 2 connects multiple sub- beams of straight panel through steel waist rail with the sub- beam of multiple arcs
The first sub- beam 311, the second sub- beam 312, the sub- beam 313 of third, the 4th sub- beam 314 and the 5th sub- beam 315 etc. that part 316 connects).
In above-mentioned assembled supporting construction, corrugated plating is formed by connecting by multiple wavelet cards through corrugated plating connector；
The multiple wavelet card includes：Multiple straight panel wavelet cards and multiple arcs wavelet card.
In above-mentioned assembled supporting construction, inner support member is by that can adjust the prefastening straight-bar structure of length and the branch at both ends
Seat is supportted to constitute.
In above-mentioned assembled supporting construction, steel waist rail, the corrugated plating and the inner support member are multiple, and the steel
Waist rail, the corrugated plating are identical with the inner support member quantity；
Wherein, one of steel waist rail forms a Pin supporting construction bodies with corrugated plating together.
Above-mentioned support equipment further includes：Longitudinal connecting member links together six longitudinally adjacent Pin supporting construction bodies.It is excellent
Choosing, longitudinal connecting member uses channel steel.
In above-mentioned supporting construction, each sub- beam of steel waist rail can be used square tube and be made, thereon, lower surface long bolts are set
Cutting openings are arranged in the square tube inside in hole, strip bolt hole side, are facilitated by strip bolt hole and connect upper and lower component (ginseng
See Fig. 8).
Referring to Fig. 9, the head end of each wavelet card of corrugated plating is connection nose end, and tail end is matched with strip nose end
Strip nose end, multiple arcs corrugated plating and multiple straight panel wavelet cards are in such a way that two ends are connected through multiple corrugated plating connectors
Connecting into circumferential can adjust prestressed cirque structure or oval ring structure, be matched with inspection-pit.Each wavelet card
The two sides for removing two ends are equipped with horizontal connection side, connect and are uniformly distributed on side equipped with the connection of multiple strips
Hole, it is convenient to be connect with the assembling type steel waist rail of upper and lower.The connection nose end of each wavelet card head end is equipped with parallel from top to bottom set
The multirow connecting hole set, often row connecting hole includes multiple spaced connecting holes, and the strip nose end of each wavelet card tail end is set
There are multiple elongate holes disposed in parallel from top to bottom；The initial and end end of each wavelet card is equipped with ribbed panel, each ribbed panel both ends
It is respectively equipped with jack card slot, convenient for jack is arranged between the wavelet card of connection at two, realizes that prestressing force is adjusted.It is this
Each wavelet card of structure type facilitates connection, and can carry out prestressing force adjusting.
In the above method, the steel waist rail in inspection-pit used in each section of borehole wall supporting is a kind of assembling type steel waist rail, ripple
Plate is a kind of pin-connected panel corrugated plating, is assembled when easy to use, recycling, transport is also convenient for after use, and prestressing force is facilitated to adjust.
In above-mentioned construction method, assembled assembled steel back cover includes：
When the inspection-pit is excavated to shield section bottom, substrate is flattened, is laid with bed course, back cover steel is laid on bed course
Plate, is laid with horizontally-supported on back cover steel plate, is horizontally supported between end and the waist rail of bottom and is bolted to connection, and seals
Bottom steel plate and it is horizontally-supported between be connected and fixed.
In above-mentioned construction method, in the assembled steel back cover, back cover steel plate is using the field-installed prefabricated steel of energy；
It is described horizontally-supported using I-steel.
In above-mentioned construction method, layering setting assembled supporting construction is as the inspection-pit in the inspection-pit excavated
In borehole wall supporting, neighbouring two layers of assembled supporting construction fissure of displacement setting.
In above-mentioned construction method, layering setting assembled supporting construction is as the inspection-pit in the inspection-pit excavated
In borehole wall supporting, the stability that can increase supporting construction is arranged in neighbouring two layers of assembled supporting construction fissure of displacement setting, the fissure of displacement.
In above-mentioned construction method, before inspection-pit excavates or in digging process, the shield machine peripheral extent soil body is carried out
Consolidation process.It can carry out the soil body in rotary jet grouting reinforcing shield machine peripheral extent before inspection-pit excavation in ground, can also open
It digs during inspection-pit, the shield machine range inner periphery soil body is reinforced several times in inspection-pit, deep hole can be used in reinforcing
Slip casting.
The embodiment of the present invention is specifically described in further detail below.
The embodiment of the present invention provides the shield cutter inspection-pit assembly construction method excavated after a kind of first jacking, with certain shield
For structure engineering, it is class ellipse that inspection-pit, which excavates size, and long axial length 3.6m, the long 3m of short axle, retaining wall supporting are added using steel waist rail
Corrugated plating adds the assembled supporting construction of inner support.
As shown in Fig. 1 to 5, before shield cutter overhauls well construction, construction guard fender is first carried out, water power is solved the problems, such as, then applies
Do assembled fore shaft coil assembly；Well head guardrail installation is carried out after the completion of fore shaft circle, material plant is marched into the arena, everything in readiness
After start inspection-pit excavation, inspection-pit step excavation simultaneously install steel waist rail, hang corrugated plating, fastened after preload.By one layer of waist
Beam adds last layer corrugated plating as a Pin supporting construction, is excavated at the top of the shield section of design inspection-pit；Shield machine jacking is extremely examined
The predetermined maintenance position of the shield section of well workover；A side region using the shield section of inspection-pit close to shield machine direction is excavated as half
Region, region stage excavation from top to bottom is excavated in the other half region as region is not excavated, half, and is layered setting assembled branch
Protection structure excavates the borehole wall supporting in region as half, until being excavated to the predetermined maintenance position of shield machine, is assembled in bottom assembly
Formula steel back cover；Shield cutter maintenance is carried out, is layered after the completion of shield cutter maintenance and is removed and recycle the assembly in the inspection-pit
Formula supporting construction, follow up backfilling of earthwork, and shield machine continues to tunnel after whole backfilling of earthwork are completed to restore landforms, that is, completes half time
Fill out formula shield cutter inspection-pit fabricated construction.
Specifically, the shield cutter inspection-pit assembly construction method excavated after above-mentioned elder generation's jacking includes the following steps：
The first step：
(1) construction concrete collar tie beam；
(2) prefabricated steel ring beam is installed；
(3) 0.5m, an assembled ring corrugated plating and a ring steel waist rail, referred to as a Pin are excavated, and is set up in time to support；
(4) step (3) is repeated, is excavated, supporting to 32 Pin assembled supporting construction, at absolute altitude 27.98m；
Second step：
(1) continue to excavate downwards, often excavate, after one Pin assembled supporting construction of supporting, carried out by the injected hole position of arrangement
Horizontal deep hole grouting；
(2) it repeats step (1) and performs 4 Pin downwards；
(3) shaft bottom carries out deep hole grouting by the hole of range of grouting and setting position；
(4) after the completion of slip casting, backfill inspection-pit to the above 3m in shield machine top, backfill uses soil cement, and this time backfill is
Because excavation has arrived shield top, need up to fill out a distance, then ensures pressure when shield machine promotes；
Third walks：
Shield machine jacking is to predetermined maintenance position；
4th step：
(1) the backfill earthwork is dug out；
(2) continue to excavate downwards, carry out pipe canopy and reinforcing ring construction；
(3) shield section is excavated, assembled supporting construction and ductule are constructed；
(4) bottom conduit is constructed；
(5) back cover is constructed；
(6) service work face is provided.
In above-mentioned digging process, the shield machine range inner periphery soil body is reinforced in three times in shaft bottom, is reinforced using deep
Hole slip casting, reinforcement depth 11m, soil stabilization index：Unconfined compressive strength is not less than 0.8MPa, should there is good the soil body after reinforcing
Good uniformity and independence.
The shield cutter inspection-pit assembly construction method excavated after above-mentioned elder generation's jacking is as follows：
(1) fore shaft circle is constructed：
Fore shaft collar tie beam overall size 1.2m × 0.5m (depth) (referring to Fig. 7).
(11) after the completion of fore shaft circle excavates, 100mm thickness C20 plain concrete cushion layers are laid with；Walling crib uses C30 commodity coagulations
Soil, disposable continuous placing are molded to form concrete collar tie beam.
(12) prefabricated steel is assembled：
After the completion of concrete collar tie beam pours, it is laid with one layer of 15mm thickness prefabricated steel at an upper portion thereof and forms prefabricated steel collar tie beam,
Pre-embedded steel slab on prefabricated steel collar tie beam and concrete collar tie beam welds, and when welding need to be fixed by the way of full weld.
(13) guardrail is installed：
To prevent sundries from surprisingly falling into, ensureing the safety of whole operating personnels, the well of 1.2m high is applied in prefabricated steel
Mouth guardrail, can be used steel guard rail, assembled corrugated plating baffle walls can also be used.
(2) earth excavation：
It cuts the earth successively to excavate from top to bottom, shoveling order is to dig the intermediate soil body after first digging the surrounding soil body.It defers to and diagonally opens
Principle is dug, first digs edge soil, then excavate to well center.Per Pin cutting depth 0.5m~0.75m, depth is equivalent to a ring waist rail
Add a ring ripple board size.Excavate the soil body and be packed into suspension bucket in time and transport, vertical transport uses 25t truck cranes, dregs to be hung to ground
The interim laydown area of face dregs, mound area will have enough safe distances with excavation area.
In digging process, plumb aligner (steel wire) unwrapping wire is set up, steel ruler is used in combination to be oriented subsidiary, stringent control maintenance
Borehole axis line ensures that deviation is not more than 5mm, excavated section size 3m × 3.6m.It needs strictly to control during earth excavation and excavates matter
Amount, avoids the occurrence of and backbreaks.
(3) borehole wall supporting：
(31) first layer waist rail is set up after earth excavation, is attached waist rail and prefabricated collar tie beam with bolt, and preload piece will
Waist rail is strutted and is put in place, and is bolted waist rail connector and each sub- beam of waist rail with bolt, and by waist rail and prefabricated collar tie beam spiral shell
Bolt is fastenedly connected.
(32) after setting up first layer waist rail, a Pin corrugated platings are set up thereunder, and corrugated plating and first layer steel waist rail are connected
It after connecing, is strutted with preload piece, is fastenedly connected circumferential corrugated plating with bolt, and corrugated plating and first of steel waist rail are bolted.
(33) second layer steel waist rail is connect with corrugated plating with connector, preload piece struts steel waist rail and is put in place, and uses
Bolt bolts connector and steel waist rail, and steel waist rail and corrugated plating fastening are bolted.
(34) inner support member is set up in time.
(35) subsequent work progress repeats (32), (33), (34) step.
It should be noted in above structure assembly Bracing Process：(1) a longitudinal short column is installed per 1m, and is set up two layers
Inner support；(2) backfill slip casting is carried out behind in corrugated plating per 1.5m；(3) per 3m longitudinal connecting member of connection.
Above-mentioned assembled support construction step sequence is as shown in Figure 6, wherein the step of figure (1) is：Leveling, performs grooving
Collar tie beam；Scheme (2) the step of be：It excavates, 0.75 meter or 0.5 meter of single；Scheme (3) the step of be：Assembled first of steel waist rail；Figure
(4) the step of is：Assembled first layer corrugated plating；Scheme (5) the step of be：Assembled lower one of steel waist rail；Scheme (6) the step of be：It opens
Earth excavation, and assembled follow-up corrugated plating and steel waist rail.
(4) corrugated plating back-grouting：
Backfill slip casting is carried out behind in corrugated plating every 1.5m, to fill corrugated plating behind gap, promotes assembled supporting
The stickiness of structure and the borehole wall.It is each on four ripple plates of monocycle corrugated plating to reserve an injected hole, or using scene
The mode of punching.
Injecting paste material uses cement mortar or the macromolecule polymer material with expansion characteristics；
(5) stair of going into the well are constructed：
Stair of going into the well using prefabricated cat ladder either stair shaft excavation when stair are fixed on steel waist rail or overhang and
On collar tie beam, it is fastened and fixed using bolt.
(6) shield jacking：
Shield machine jacking is to the predetermined maintenance position of the shield section of inspection-pit.
(7) half processing and back cover are excavated：
Region is excavated using a side region of the shield section of inspection-pit far from shield machine direction as half, the other half region is shield
Region stage excavation from top to bottom is excavated half, and is layered setting assembled supporting construction and is excavated as half in structure machine position
The borehole wall supporting in region, until the shield machine overhauling position at inspection-pit bottom is excavated to, in bottom assembly assembled steel back cover；
(8) shield cutter overhauls：
Shield cutter is overhauled；
(9) inspection-pit backfill, structure recycling and land restoration：
(81) it backfills：After the completion of shield machine overhauling, all assembled supporting construction, backfill maintenance are successively recycled from bottom to up
Well.
1. removing a Pin assembleds supporting construction and corresponding inner support member；
2. the soil body and compaction in layers of the follow-up backfill with a Pin assembled supporting construction same thickness (0.5m), compacting factor
Not less than 0.94；
3. repeat 1., 2. step, until removing all assembled supporting construction.
(82) it is backfilled at fore shaft circle, removes guardrail, remove prefabricated steel, abolish fore shaft circle concrete, backfill plain earth rammer
It is real, restore original appearance, that is, completes the construction method of the present invention.
The construction method of the present invention, the supporting by using assembled supporting construction as the inspection-pit borehole wall, with digging with branch,
Closing cyclization is fast, improves construction efficiency, the supporting construction facilitates recycling after use, will not remain in the soil body, pollution-free, ring
Guarantor property is good, by the way of shield section is excavated using half, excavates that soil mass is few, and also reduction primary backfill soil mass, improves inspection-pit
Construction speed and shield machine inspection speed.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (10)
1. the shield cutter inspection-pit assembly construction method excavated after a kind of elder generation's jacking, which is characterized in that including：
Construction pretreatment is carried out in the position of setting inspection-pit；
Assembled fore shaft coil assembly is made at inspection-pit excavating；
In the corresponding inspection-pit position stage excavation inspection-pit of the assembled fore shaft coil assembly, divide in the inspection-pit excavated
Borehole wall supporting of the layer setting assembled supporting construction as the inspection-pit, until the inspection-pit is excavated to the shield of the inspection-pit
Section top；
Shield machine has excavated the predetermined maintenance position of beneath portions into hole and jacking to the inspection-pit；
The processing of half excavation：Region is excavated using a side region of the shield section of inspection-pit far from shield machine direction as half, the other half
Region is shield machine position, excavates region stage excavation from top to bottom described half, and be layered setting assembled supporting knot
Structure excavates the borehole wall supporting in region as half, until the maintenance position of the inspection-pit is excavated to, in bottom assembly assembled steel
Back cover；
After the completion of half excavates, shield cutter maintenance is carried out, layering removes and recycles the inspection-pit after the completion for shield cutter maintenance
Interior assembled supporting construction, follow up backfilling of earthwork, and shield machine continues to tunnel after whole backfilling of earthwork are completed to restore landforms, i.e.,
Complete half backfill formula shield cutter inspection-pit fabricated construction.
2. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to claim 1, feature exist
In in the method, making assembled fore shaft coil assembly includes at excavation inspection-pit：
Step 1) cast-in-place concrete collar tie beam：
The earthwork within the scope of collar tie beam is excavated at inspection-pit, construction cushion coat, installation pre-embedded steel slab, formwork supporting plate, pours circle at assembling reinforcement
Concrete collar tie beam is made in beam concrete；
Step 2) assembly prefabricated steel：
Installation prefabricated steel forms prefabricated steel collar tie beam on the concrete collar tie beam made of pouring, by prefabricated steel collar tie beam and coagulation
Pre-embedded steel slab welding on pedosphere beam, when welding, are fixed by the way of full weld, that is, are completed assembled fore shaft circle and made；
Step 3) installs well head guardrail：
Steel guard rail is set on prefabricated steel collar tie beam as well head guardrail, that is, assembled fore shaft coil assembly is made.
Alternatively,
In the method, include excavating making assembled fore shaft coil assembly at inspection-pit：
Step 1) is laid with bed course：
It is being laid with bed course in inspection-pit position；
Step 2) assembly prefabricated steel：
Prefabricated steel is fixedly mounted on the bed course of laying and forms prefabricated steel collar tie beam, that is, completes assembled fore shaft circle and makes；
Step 3) installs well head guardrail：
Steel guard rail is set on prefabricated steel collar tie beam as well head guardrail, that is, assembled fore shaft coil assembly is made.
3. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to claim 1, feature exist
In in the method, in the corresponding inspection-pit position stage excavation inspection-pit of the assembled fore shaft coil assembly, what is excavated
Borehole wall supporting of the layering setting assembled supporting construction as the inspection-pit in inspection-pit, until the inspection-pit is excavated to the inspection
It is at the top of the shield section of well workover：
(1) when stage excavation inspection-pit, first of waist rail is set up after carrying out earth excavation, by first of waist rail and is filled with connector
Prefabricated steel collar tie beam connection with formula fore shaft coil assembly, after first of waist rail closing cyclization, by first of waist rail and pre-manufactured steel
Plate collar tie beam is bolted connection；
(2) after setting up first layer waist rail, continuing to excavate the soil body, every layer of cutting depth is equal to or more than the width of one layer of corrugated plating,
One layer of corrugated plating is set up below first of waist rail, this layer of corrugated plating is connect fastening with first of waist rail above it, up and down
Adjacent one layer of steel waist rail and one layer of corrugated plating forms a Pin assembled supporting construction；
(3) assembled lower one of waist rail, the roads Bing Jianggai waist rail are connect with the corrugated plating for the closing cyclization that top assembly is completed, and adjacent two
The assembled seam of road road waist rail is staggered, and the assembled seam of adjacent twice corrugated plating is staggered；
(4) inner support is set up in every Pin assembleds supporting construction；
Work progress later repeats (3), (4) step, until the inspection-pit is excavated at the top of the shield section of the inspection-pit.
4. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to claim 3, feature exist
In in the method, during borehole wall supporting of the assembled supporting construction as the inspection-pit is arranged in layering, in every 1m
A longitudinal short column is connected on two waist rails at both ends, and sets up two layers of inner support；Per 1.5m in corrugated plating backfill slip casting behind；
A longitudinal connecting member is connected on two waist rails at the both ends in per 3m.
5. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to claim 4, feature exist
In the longitudinal connecting member uses channel steel, and the steel waist rail of six longitudinally adjacent Pin assembled supporting construction is connected together.
6. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to any one of claims 1 to 5,
It is characterized in that, in the method, layering setting assembled supporting construction is as the inspection-pit in the inspection-pit excavated
Borehole wall supporting includes：
In the conventional section of excavated inspection-pit, the more Pin conventional types assembled supporting construction of layering setting in the inspection-pit excavated
Borehole wall supporting as the inspection-pit；
In the changeover portion of excavated inspection-pit, the more Pin transiens assembled supporting construction of layering setting in the inspection-pit excavated
Borehole wall supporting as the inspection-pit；
In the shield section of excavated inspection-pit, the more Pin shields type assembled supporting construction of layering setting in the inspection-pit excavated
Borehole wall supporting as the inspection-pit.
7. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to claim 6, feature exist
In, in the method,
Include per Pin conventional type assembled supporting construction：Steel waist rail, corrugated plating, inner support member and multiple connectors；Wherein, described
Steel waist rail be and the matched loop configuration of borehole wall shape in underground shaft；
The corrugated plating be and the matched loop configuration of borehole wall shape in underground shaft；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector, connector is preferably adopted
Use bolt；
The inner support member is located in the steel waist rail, and the both ends of the inner support member are supported on the support base, can be to described
Waist rail is pre-tightened；
Include per Pin transiens assembled supporting construction：Steel waist rail, inner support member and multiple connectors；Wherein, the steel waist rail
For with the matched loop configuration of borehole wall shape in underground shaft；
The inner support member is located in the steel waist rail, and the both ends of the inner support member are supported on the support base, can be to described
Waist rail is pre-tightened；
Include per Pin shield type assembled supporting construction：Steel waist rail, corrugated plating, inner support member and multiple connectors；Wherein, described
Steel waist rail be and the matched loop configuration of borehole wall shape in underground shaft；
The corrugated plating be and the matched loop configuration of borehole wall shape in underground shaft；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector, connector is preferably adopted
Use bolt；
The inner support member is located in the steel waist rail, and the both ends of the inner support member are supported on the support base, can be to described
Waist rail is pre-tightened.
8. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to any one of claims 1 to 5,
It is characterized in that, in the method, assembled assembled steel back cover includes：
When the inspection-pit is excavated at the top of shield section, substrate is flattened, is laid with bed course, back cover steel plate is laid on bed course,
It is laid with horizontally-supported on back cover steel plate, is horizontally supported between end and the waist rail of bottom and is bolted to connection, back cover steel
Plate and it is horizontally-supported between be connected and fixed.
9. the shield cutter inspection-pit assembly construction method excavated after elder generation's jacking according to claim 8, feature exist
In in the assembled steel back cover, back cover steel plate is using the field-installed prefabricated steel of energy；
It is described horizontally-supported using I-steel.
10. the shield cutter inspection-pit fabricated construction side excavated after elder generation's jacking according to any one of claims 1 to 5
Method, which is characterized in that in the method, layering setting assembled supporting construction is as the inspection-pit in the inspection-pit excavated
Borehole wall supporting in, the setting of neighbouring two layers of assembled supporting construction fissure of displacement.
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| CN201810468569.9A CN108678751B (en) | 2018-05-16 | 2018-05-16 | Assembly type construction method of shield cutter head manhole by jacking and excavating firstly |
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| CN201810468569.9A CN108678751B (en) | 2018-05-16 | 2018-05-16 | Assembly type construction method of shield cutter head manhole by jacking and excavating firstly |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110748354A (en) * | 2019-12-10 | 2020-02-04 | 中铁十四局集团隧道工程有限公司 | Construction method of assembled shield maintenance well |
| CN110924949A (en) * | 2019-12-10 | 2020-03-27 | 中铁十四局集团隧道工程有限公司 | Assembled shield structure manhole system |
| CN111927464A (en) * | 2020-08-14 | 2020-11-13 | 中建三局集团有限公司 | Prefabricated assembled shaft inner supporting structure |
| CN112796763A (en) * | 2021-03-19 | 2021-05-14 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Deep underground tunnel ventilation shaft supporting construction |
| RU2804015C1 (en) * | 2023-05-10 | 2023-09-26 | Владимир Васильевич Галайко | Method for fixing the mine shaft of elliptical section with monolithic reinforced concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110748354A (en) * | 2019-12-10 | 2020-02-04 | 中铁十四局集团隧道工程有限公司 | Construction method of assembled shield maintenance well |
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| CN111927464A (en) * | 2020-08-14 | 2020-11-13 | 中建三局集团有限公司 | Prefabricated assembled shaft inner supporting structure |
| CN112796763A (en) * | 2021-03-19 | 2021-05-14 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Deep underground tunnel ventilation shaft supporting construction |
| RU2804015C1 (en) * | 2023-05-10 | 2023-09-26 | Владимир Васильевич Галайко | Method for fixing the mine shaft of elliptical section with monolithic reinforced concrete |
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|---|---|
| CN108678751B (en) | 2020-04-07 |
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