CN108643917A - Half backfill formula shield cutter inspection-pit assembly construction method - Google Patents
Half backfill formula shield cutter inspection-pit assembly construction method Download PDFInfo
- Publication number
- CN108643917A CN108643917A CN201810468550.4A CN201810468550A CN108643917A CN 108643917 A CN108643917 A CN 108643917A CN 201810468550 A CN201810468550 A CN 201810468550A CN 108643917 A CN108643917 A CN 108643917A
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- China
- Prior art keywords
- inspection
- pit
- steel
- waist rail
- assembled
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/08—Sinking shafts while moving the lining downwards
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
-
- 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
- E21D8/00—Shafts not provided for in groups E21D1/00 - E21D7/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
Abstract
The invention discloses a kind of shield cutter inspection-pit assembly construction methods, including：Construction pretreatment；It excavates and makes assembled fore shaft circle at inspection-pit, well head guardrail is installed；Stage excavation inspection-pit, borehole wall supporting of the layering setting assembled supporting construction as the inspection-pit in inspection-pit, until projected depth is excavated to, in bottom assembling construction steel back cover；It is backfilled at the second home of shield machine top at more than demolition of support structure at hole to shield machine top the first home with half back-filling way；Shield machine is into hole and earth excavation is to bottom is overhauled, and carries out shield cutter maintenance, the assembled supporting construction removed in inspection-pit is layered after the completion of shield cutter maintenance, follow-up backfill, shield machine continues to tunnel after the completion of waiting for all backfills.This method is safe, and at low cost.
Description
Technical field
The present invention relates to inspection-pit construction fields, more particularly to a kind of half backfill formula shield cutter inspection-pit fabricated 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 reinforced concrete structure, and structure performs
Will produce dust pollution in the process, after shield cutter maintenance, when preparation backfills inspection-pit, shaft wall structure abolish it is very difficult,
Concrete walling can not be completely removed from soil, has to stay in soil, to being backfilled with soil in inspection-pit well, made in this way
At the problem of be：Since concrete walling stays in soil, the construction of follow-up Other Engineering can be adversely affected, not only ring
Guarantor property difference and low construction efficiency.And in the maintenance well construction carried out with concrete, the especially engineerings such as city underground, due to making
Industry operating space is narrow, operating environment is complicated, construction machinery type is various, is easily damaged to operating personnel and close by pipeline
The more influences for closing on risk source such as collection, are also not easy to safe construction.Therefore, inventor discovers how that energy is efficient, pollution-free
And the carry out shield cutter maintenance well construction of safety is problem to be solved.
Invention content
Based on the problems of prior art, the object of the present invention is to provide a kind of half backfill formula shield cutter inspection-pits
Assembly construction method can improve construction efficiency, reduce construction cost, and effectively reducing the concrete applied by inspection-pit can not return
Receive the problems such as Other Engineering construction is polluted and influenced caused by the soil body.
The purpose of the present invention is what is be achieved through the following technical solutions：
Embodiment of the present invention provides a kind of half backfill formula shield cutter inspection-pit assembly construction 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 projected depth,
In the bottom assembly assembled steel back cover of the inspection-pit；
Half backfill is handled：Region is backfilled as half close to the half region in shield machine direction using in the inspection-pit excavated,
The other half region is set as region is not backfilled, in the shaft bottom of inspection-pit between not backfilling region and partly backfilling region from bottom to up
Breast boards is set, region is half-and-half backfilled and is layered the assembled supporting construction for removing and recycling the half backfill region from bottom to up, and is right
The half backfill region for removing assembled supporting construction carries out follow-up backfilling of earthwork, until the assembled supporting construction in inspection-pit is torn open
Except the second home to the first home more than shield machine top set, more than backfilling of earthwork to shield machine top set
Place；
After the completion of half backfills, shield machine carries out shield into hole and earth excavation to half backfill region of the maintenance bottom
Structure cutterhead overhauls, and is layered from bottom to up after the completion of shield cutter maintenance and removes and recycle whole assembled branch in the inspection-pit
Protection structure, 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 backfill formula
Shield cutter inspection-pit fabricated construction.
As seen from the above technical solution provided by the invention, half backfill formula shield cutter provided in an embodiment of the present invention
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；Meanwhile the present invention in inspection-pit to using half backfill to handle, it is possible to reduce the backfilling working in inspection-pit work progress
Amount improves inspection-pit construction speed.Moreover, because to be related to equipment relatively fewer for the construction method, at the construction field (site) risk source compared with
In the case of more, it also can preferably ensure 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 half backfill formula shield cutter inspection-pit assembly construction method flow chart provided in an embodiment of the present invention；
Fig. 2 is assembled fore shaft coil assembly floor map 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 that assembled support construction walks sequence schematic diagram in construction method provided in an embodiment of the present invention；
Fig. 5 is the floor map of assembled supporting construction in construction method provided in an embodiment of the present invention；
Fig. 6 is the side diagrammatic cross-section of assembled supporting construction in construction method provided in an embodiment of the present invention；
Fig. 7 is the inspection-pit diagrammatic cross-section in construction method provided in an embodiment of the present invention；
Fig. 8 is diagrammatic cross-section at half backfill region of the inspection-pit in construction method provided in an embodiment of the present invention；
Fig. 9 is the diagrammatic cross-section of the sub- beam of the steel waist rail in construction method provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of the wavelet card of the corrugated plating in construction method provided in an embodiment of the present invention；
In Fig. 2,3：21- concrete collar tie beams；22- prefabricated steel collar tie beams；23- prefabricated steel collar tie beam channel steels；24- weld seams；25-
Bolt hole；26- corrugated plating baffle walls；
In Fig. 5,6,7：31- steel waist rails；The first sub- beams of 311-；The second sub- beams of 312-；The sub- beam of 313- thirds；The 4th sons of 314-
Beam；The 5th sub- beams of 315-；316- steel waist rail connectors；32- inner support members；The first support bases of 321-；The second support bases of 322-；
33- corrugated platings；
In Fig. 8：81- breast boards；82- triangle inner supports；32- inner support members；821- diagonal braces；822- Two bors d's oeuveres work is longitudinally vertical
Column；A- shield machines；B- shield machine shields direction；C- partly backfills region；B- removes the region of assembled supporting construction；
In Fig. 9：310- strip bolts hole；317- cutting openings；
In Figure 10：330- wavelet cards；331- strip nose ends；332- connection nose ends；333,335- ribbed panels；334、336-
Jack 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. 1,8, the embodiment of the present invention provides a kind of half backfill formula shield cutter inspection-pit assembly construction 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；
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 projected depth,
In the bottom assembly assembled steel back cover of the inspection-pit；
Half backfill is handled：Region is backfilled as half close to the half region in shield machine direction using in the inspection-pit excavated,
The other half region is set as region is not backfilled, in the shaft bottom of inspection-pit between not backfilling region and partly backfilling region from bottom to up
Breast boards is set, region is half-and-half backfilled and is layered the assembled supporting construction for removing and recycling the half backfill region from bottom to up, and is right
The half backfill region for removing assembled supporting construction carries out follow-up backfilling of earthwork, until the assembled supporting construction in inspection-pit is torn open
Except the second home to the first home more than shield machine top set, more than backfilling of earthwork to shield machine top set
Place；
After the completion of half backfills, shield machine carries out shield into hole and earth excavation to half backfill region of the maintenance bottom
Structure cutterhead overhauls, and is layered from bottom to up after the completion of shield cutter maintenance and removes and recycle whole assembled branch in the inspection-pit
Protection structure, 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 backfill 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. 2,3) 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 uses corrugated plating barricade；
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 above 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, the shoveling for excavating inspection-pit is：
It successively cuts the earth from top to bottom, shoveling order is to dig the intermediate soil body after first digging the surrounding soil body, and each digging depth is equal to
The height of one layer of assembled supporting construction；
Excavate the soil body to transport using hanging device lifting.
In above-mentioned construction method, in inspection-pit digging process, it is oriented measurement, control inspection-pit misalignment of axe is not more than
5mm, inspection-pit excavated section size are equal to design size.
Referring to Fig. 5,6, in above-mentioned construction method, the layering setting assembled supporting construction conduct in the inspection-pit excavated
The borehole wall supporting of the inspection-pit includes：
In the conventional section of excavated inspection-pit, the more Pin routines section assembled supportings of layering setting in the inspection-pit excavated
Borehole wall supporting of the structure as the inspection-pit；
Include per Pin routine section assembled supporting construction：Steel waist rail, corrugated plating, inner support member and multiple connectors；Wherein,
The steel waist rail be and the matched loop configuration of borehole wall shape in inspection-pit；
The corrugated plating be and the matched loop configuration of borehole wall shape in inspection-pit；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector；
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 steel waist rail is pre-tightened；
In above-mentioned routine section assembled supporting construction, steel waist rail is formed by connecting by multiple sub- beams through steel waist rail connector；It is more
A sub- beam includes：The sub- beam of multiple straight panels and the sub- beam of multiple arcs through steel waist rail connector 316 (referring to connecting of illustrating in Fig. 5
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.).
In above-mentioned routine section assembled supporting construction, corrugated plating connected through corrugated plating connector by multiple wavelet cards and
At；The multiple wavelet card includes：Multiple straight panel wavelet cards and multiple arcs wavelet card.
In above-mentioned routine section assembled supporting construction, inner support member is by that can adjust the prefastening straight-bar structure and two of length
The support base at end is constituted.
In above-mentioned routine section assembled supporting construction, steel waist rail, corrugated plating and inner support member be it is multiple, and steel waist rail,
Corrugated plating is identical with inner support member quantity.
In the changeover portion of excavated inspection-pit, the more Pin changeover portions assembled supportings of layering setting in the inspection-pit excavated
Borehole wall supporting of the structure as the inspection-pit；
Include per Pin changeover portion assembled supporting construction：Steel waist rail, inner support member and multiple connectors；Wherein, the steel
Waist rail be and the matched loop configuration of borehole wall shape in inspection-pit；
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 steel waist rail is pre-tightened；
In above-mentioned changeover portion assembled supporting construction, steel waist rail is formed by connecting by multiple sub- beams through steel waist rail connector；It is more
A sub- beam includes：The sub- beam of multiple straight panels and the sub- beam of multiple arcs through steel waist rail connector 316 (referring to connecting of illustrating in Fig. 5
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.).
In the shield section of excavated inspection-pit, the more Pin shields section assembled supportings of layering setting in the inspection-pit excavated
Borehole wall supporting of the structure as the inspection-pit；
Include per Pin shield section assembled supporting construction：Steel waist rail, corrugated plating, inner support member and multiple connectors；Wherein,
The steel waist rail be and the matched loop configuration of borehole wall shape in inspection-pit；
The corrugated plating be and the matched loop configuration of borehole wall shape in inspection-pit；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector；
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 steel waist rail is pre-tightened.
In above-mentioned shield section assembled supporting construction, steel waist rail is formed by connecting by multiple sub- beams through steel waist rail connector；It is more
A sub- beam includes：The sub- beam of multiple straight panels and the sub- beam of multiple arcs through steel waist rail connector 316 (referring to connecting of illustrating in Fig. 5
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.).
In above-mentioned shield section assembled supporting construction, corrugated plating by multiple wavelet cards through corrugated plating connector connect and
At；The multiple wavelet card includes：Multiple straight panel wavelet cards and multiple arcs wavelet card.
In above-mentioned shield section assembled supporting construction, inner support member is by that can adjust the prefastening straight-bar structure and two of length
The support base at end is constituted.
In above-mentioned shield section assembled supporting construction, steel waist rail, corrugated plating and inner support member be it is multiple, and steel waist rail,
Corrugated plating is identical with inner support member quantity.
In the above method, the steel waist rail used in each section of borehole wall supporting of inspection-pit is a kind of steel waist rail, and corrugated plating is one
Kind 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, in the conventional section of excavated inspection-pit, the more Pin of layering setting in the inspection-pit excavated
Conventional section assembled supporting construction includes as the borehole wall supporting of the inspection-pit：
(1) when the conventional section of stage excavation inspection-pit, first of steel waist rail is set up after earth excavation, with connector by first
Road steel waist rail is connect with the prefabricated steel collar tie beam of assembled fore shaft coil assembly；
(2) after setting up first of steel waist rail, continue to excavate the soil body, every layer of cutting depth is equal to or more than one layer of corrugated plating
Width sets up one layer of corrugated plating below first of steel waist rail, this layer of corrugated plating is connect tightly with the waist rail of steel together above it
Gu neighbouring one of steel waist rail and one layer of corrugated plating forms a Pin assembled supporting construction；
(3) corrugated plating of assembled lower one of steel waist rail, the closing cyclization that the roads Bing Jianggai steel waist rail is completed with top assembly connects
It connects, the assembled seam of adjacent twice steel waist rail is staggered, and the assembled seam of adjacent two layers corrugated plating is staggered；
(4) match in formula supporting construction in the conventional section of every Pin dresses and set up inner support；
Work progress later repeats step (3), (4), until the inspection-pit is excavated to conventional section projected depth.
In above-mentioned construction method, in the changeover portion of excavated inspection-pit, the more Pin of layering setting in the inspection-pit excavated
Changeover portion assembled supporting construction includes as the borehole wall supporting of the inspection-pit：
(1) when the changeover portion of stage excavation inspection-pit, first of steel waist rail is set up after earth excavation, with connector by transition
The roads the Di steel waist rail of the conventional section assembled supporting construction of first of steel waist rail of section and inspection-pit connects；
(2) after setting up first of steel waist rail, continue to excavate the soil body, every layer of cutting depth is equal to or more than one steel waist rail
Width, one of steel waist rail under being set up below first of steel waist rail, which is connect with the waist rail of steel together above it
Fastening, neighbouring twice steel waist rail assembly seam are staggered, to increase the stability of supporting construction, adjacent twice steel waist rail composition
One Pin assembled supporting construction；
(3) inner support is set up in every Pin changeover portions assembled supporting construction；
Work progress later repeats (2), (3) step, until the inspection-pit is excavated to changeover portion projected depth.
In above-mentioned construction method, the more Pin shields section assembled supporting construction conducts of layering setting in the inspection-pit excavated
The borehole wall supporting of the inspection-pit includes：
(1) when the shield section of stage excavation inspection-pit, first of steel waist rail is set up after earth excavation, with connector by shield
The roads the Di steel waist rail of the changeover portion assembled supporting construction of first of steel waist rail of section and inspection-pit connects；
(2) after setting up first of steel waist rail, continue to excavate the soil body, every layer of cutting depth is equal to or more than one layer of corrugated plating
Width sets up one layer of corrugated plating below first of steel waist rail, this layer of corrugated plating is connect tightly with the waist rail of steel together above it
Gu neighbouring one of steel waist rail and one layer of corrugated plating forms a Pin assembled supporting construction；
(3) corrugated plating of assembled lower one of steel waist rail, the closing cyclization that the roads Bing Jianggai steel waist rail is completed with top assembly connects
It connects；It is set for neat seam with the whole steel waist rails and corrugated plating for not backfilling region junction in half backfill region of shield section, in this way
Convenient for when half-and-half backfill region carries out half backfill processing, facilitating the shield section assembled supporting construction for removing the region, remaining position
The assembled seam for the adjacent twice steel waist rail set is staggered, to increase the stability of supporting construction, the adjacent two layers ripple of remaining position
The assembled seam of plate is staggered；
(4) match in formula supporting construction in the conventional section of every Pin dresses and set up inner support；
Work progress later repeats step (3), (4), until the inspection-pit is excavated to shield section projected depth.
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. 9).
Referring to Figure 10, the head end of the wavelet card of each corrugated plating is connection nose end, and tail end is to be matched with strip nose end
Strip nose end, multiple arcs wavelet card and multiple straight panel wavelet cards connect in such a way that two ends are connected through multiple corrugated platings
Fitting, which connects into, circumferential to adjust prestressed cirque structure or oval ring structure, matched with inspection-pit.Each wavelet
The two sides that card removes two ends are equipped with horizontal connection side, connect and are uniformly distributed on side equipped with multiple strips company
Hole is connect, it is convenient to be connect with the steel waist rail of upper and lower.The connection nose end of each wavelet card head end is equipped with disposed in parallel from top to bottom
Multirow connecting hole, often row connecting hole includes multiple spaced connecting holes, the strip nose end of each wavelet card tail end be equipped with from
Multiple elongate holes disposed in parallel under；The initial and end end of each wavelet card is equipped with ribbed panel, each ribbed panel both ends difference
Equipped with jack card slot, convenient for jack is arranged between the wavelet card of connection at two, realize that prestressing force is adjusted.This structure
Each wavelet card of form facilitates connection, and can carry out prestressing force adjusting.
It is adjacent in conventional section assembled supporting construction and shield section assembled supporting construction in above-mentioned construction method
A longitudinal short column is connected on twice steel waist rail, and sets up two layers of inner support；(such as may be used at interval of a distance according to formation condition
To be 1.5m or 2m, i.e. formation stability is good, then can be with distance, and formation stability is poor, then can be apart from short) in ripple backboard
After backfill slip casting；A longitudinal connecting member is connected on six adjacent steel waist rails；
In the method, it is short that a longitudinal direction is connected in changeover portion assembled supporting construction, on adjacent twice steel waist rail
Column, and set up two layers of inner support.
In above-mentioned construction method, the longitudinal connecting member uses channel steel, by six longitudinally adjacent Pin assembled supporting construction
Steel waist rail connect together.
In above-mentioned routine section assembled supporting construction and shield section assembled supporting construction, one of steel waist rail and one layer of ripple
The height for the Pin assembled supporting construction that plate collectively constitutes is 0.5~0.75 meter；Corrugated plating is cirque structure or elliptical ring
Shape structure；Steel waist rail is identical as the shape of the corrugated plating.
In above-mentioned routine section, changeover portion and shield section assembled supporting construction, steel waist rail is cirque structure or elliptical ring
Shape structure.
In above-mentioned construction method, include in the bottom assembly assembled steel back cover of the inspection-pit：
When the inspection-pit is excavated to projected depth, substrate is flattened, is laid with bed course, back cover steel plate is laid on bed course,
It is laid on back cover steel plate horizontally-supported, 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.
In above-mentioned construction method, the back cover steel plate is using the field-installed prefabricated steel of energy；The horizontally-supported use
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, to increase the stability of supporting construction.
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.
In above-mentioned construction method, rotary jet grouting reinforcing shield machine peripheral extent can be carried out in ground before inspection-pit excavation
The interior soil body several times can also be reinforced the shield machine range inner periphery soil body in inspection-pit during excavating inspection-pit,
Deep hole grouting can be used in reinforcing.
The embodiment of the present invention is specifically described in further detail below.
The embodiment of the present invention provides a kind of half backfill formula shield cutter inspection-pit assembly construction method, with certain shield engineering
For, it is class ellipse that inspection-pit, which excavates size, and long axial length 3.6m, the long 3m of short axle is (it is recognised that the maintenance that the present embodiment provides
Well section form, be only used for for example, the present invention method be also applied for section be circular inspection-pit, as long as using with its
Matched assembled supporting construction), retaining wall supporting uses and is matched with inspection-pit routine section, changeover portion and shield Duan Yougang waists
Beam adds the assembled supporting construction that corrugated plating adds inner support to form and be only made of steel waist rail, inner support.
As shown in Figure 1, before shield cutter maintenance well construction, construction guard fender is first carried out, solves the problems, such as water power, then performs dress
With formula fore shaft circle；Well head guardrail installation is carried out after the completion of fore shaft circle, material plant marches into the arena, starts to examine after everything in readiness
Well workover is excavated, and inspection-pit step excavation simultaneously installs steel waist rail, hangs corrugated plating, is fastened after preload.One layer of waist rail is added one
Layer corrugated plating is excavated to projected depth, assembling construction steel back cover as a Pin supporting construction.Primary backfill, using half backfill side
Formula often sets up one layer of triangle inner support in the inspection-pit excavated, installs one piece of breast boards, removes the inspection of 0.5m high
Assembled supporting construction at the well head of well workover recycles assembled supporting construction after dismounting, and between breast boards and shaft bottom hole
Sector region follow-up backfill, until the assembled supporting construction of the inspection-pit is torn open to the above 0.5m in shield machine top, the earthwork is returned
It is filled to the above 3m in shield machine top；Shield machine is into hole, and earth excavation carries out cutterhead maintenance, after the completion of maintenance certainly to bottom of foundation ditch
Assembled supporting construction is removed toward higher slice and is recycled in shaft bottom, and follow up backfilling of earthwork, is waited for all backfilling and is completed land restoration backing
Structure continues to tunnel, that is, completes the construction method.
In digging process, the shield machine range inner periphery soil body is reinforced in three times in shaft bottom, reinforces and is noted using deep hole
Slurry, reinforcement depth 11m, soil stabilization index：Unconfined compressive strength is not less than 0.8MPa, should there is good the soil body after reinforcing
Uniformity and independence.
Above-mentioned half backfill formula shield cutter inspection-pit assembly construction method is as follows：
(1) fore shaft circle is constructed：
Fore shaft collar tie beam overall size 1.2m × 0.5m (depth) (referring to Fig. 2,3).
(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 molding.
(12) prefabricated steel is assembled：
After the completion of concreting, it is laid with one layer of 15mm thickness prefabricated steel, prefabricated steel and concrete collar tie beam at an upper portion thereof
On pre-embedded steel slab welding, 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 steel of 1.2m high is applied in prefabricated steel
Guardrail.
(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 of 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 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 at interval of a distance (such as can be 1.5m or 2m)；(3) connect per 3m
Connect a longitudinal connecting member.
Above-mentioned assembled support construction step sequence is as shown in Figure 4, 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.
Aforesaid way is suitable for conventional section, is also applied for shield section, shield section pay attention to half backfill region of shield section with
It is that neat seam is set not backfill whole steel waist rails of region junction and corrugated plating, is also applied for changeover portion, only changeover portion
It is added without corrugated plating layering and gathers and steel waist rail is set, changeover portion assembled supporting construction is formed due to being all made of steel waist rail
It gathers and is arranged, reinforcing ring supporting construction is formed in the changeover portion of inspection-pit.
(4) corrugated plating back-grouting：
According to formation condition, at interval of a distance (such as can be 1.5m or 2m, i.e. formation stability is good, then can between
Every distance, formation stability is poor, then can be short with spacing distance) backfill slip casting is carried out behind in corrugated plating, to fill corrugated plating
Behind gap promotes the stickiness of assembled supporting construction and the borehole wall.It is each reserved on four ripple plates of monocycle corrugated plating
One injected hole, or in such a way that scene is punched.
Injecting paste material uses cement mortar or the macromolecule polymer material with expansion characteristics；
(5) stair of going into the well are constructed：
Stair are fixed on steel waist rail or are overhang when either stair inspection-pit excavates using prefabricated cat ladder by stair of going into the well
In on collar tie beam, it is fastened and fixed using bolt.
(6) inspection-pit back cover：
When digging to projected depth, substrate cleaning leveling is carried out, bed course is laid with, steel plate is laid on bed course, on the steel plate
Be laid with it is horizontally-supported, it is horizontally-supported use I22a I-steel, central axes spacing 0.5m, be horizontally supported between end and waist rail lead to
Bolt is crossed to be fixedly connected, steel plate and it is horizontally-supported between be connected and fixed.Back cover steel plate uses prefabricated steel, and scene is assembled.
(7) inspection-pit backfill, structure recycling and land restoration (referring to Fig. 8)：
Entire inspection-pit backfill operation is shared twice.
(71) primary backfill：
1. installing one layer of triangle inner support member in the shaft bottom of inspection-pit；
2. installing breast boards；
3. removing supporting construction at the hole of bottom shaft bottom；
4. the sector region between follow-up backfill breast boards and shaft bottom hole.
It repeats the above steps, until structural demolition to the above 0.5m in shield machine top, is backfilled at the 3m of shield machine top.
(72) secondary backfill：After the completion of shield machine overhauling, the assembled supporting of all steel constructions is successively recycled from bottom to up
Structure backfills inspection-pit.
1. removing a Pin assembleds supporting construction and the corresponding bracing members as inner support member；
2. the soil body and the compaction in layers of follow-up one Pin assembled supporting construction same thickness (0.5m) of backfill, compacting factor is not
Less than 0.94；
3. repeat 1., 2. step, until removing all assembled supporting construction.
(73) it is backfilled at assembled fore shaft circle, removes well head guardrail, prefabricated steel collar tie beam is removed, if there is coagulation pedosphere
Beam abolishes the concrete collar tie beam of assembled fore shaft circle, backfills rammed earth, restores 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, and the assembled supporting construction recycles after facilitating dismounting after use, will not remain in the soil body
In, pollution-free, the feature of environmental protection is good, and when primary backfill, using half back-filling way, the backfill soil body is few, improves the construction effect of inspection-pit
Rate.
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. a kind of half backfill formula shield cutter inspection-pit assembly construction method, 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 projected depth, in institute
State the bottom assembly assembled steel back cover of inspection-pit；
Half backfill is handled：Region is backfilled as half close to the half region in shield machine direction using in the inspection-pit excavated, it is another
Half region is not as region is backfilled, and in the shaft bottom of inspection-pit, setting from bottom to up is kept off between not backfilling region and partly backfilling region
Native plate half-and-half backfills region and is layered the assembled supporting construction for removing and recycling the half backfill region from bottom to up, and to removing
Half backfill region of assembled supporting construction carries out follow-up backfilling of earthwork, until the assembled demolition of support structure in inspection-pit is extremely
The first home more than shield machine top set, at the second home more than backfilling of earthwork to shield machine top set；
After the completion of half backfills, shield machine carries out shield knife into hole and earth excavation to half backfill region of the maintenance bottom
Disk overhauls, and is layered from bottom to up after the completion of shield cutter maintenance and removes and recycle whole assembled supporting knots in the inspection-pit
Structure, 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 backfill formula shield
Cutterhead inspection-pit fabricated construction.
2. half backfill formula shield cutter inspection-pit assembly construction method according to claim 1, which is characterized in that described
In method, include excavating making assembled fore shaft coil assembly 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 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. half backfill formula shield cutter inspection-pit assembly construction method according to claim 1, which is characterized in that described
In method, layering setting assembled supporting construction includes as the borehole wall supporting of the inspection-pit in the inspection-pit excavated：
In the conventional section of excavated inspection-pit, the more Pin routines section assembled supporting construction of layering setting in the inspection-pit excavated
Borehole wall supporting as the inspection-pit；
Include per Pin routine section 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 inspection-pit；
The corrugated plating be and the matched loop configuration of borehole wall shape in inspection-pit；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector；
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
Steel waist rail is pre-tightened；
In the changeover portion of excavated inspection-pit, the more Pin changeover portions assembled supporting construction of layering setting in the inspection-pit excavated
Borehole wall supporting as the inspection-pit；
Include per Pin changeover portion 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 inspection-pit；
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
Steel waist rail is pre-tightened；
In the shield section of excavated inspection-pit, the more Pin shields section assembled supporting construction of layering setting in the inspection-pit excavated
Borehole wall supporting as the inspection-pit；
Include per Pin shield section 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 inspection-pit；
The corrugated plating be and the matched loop configuration of borehole wall shape in inspection-pit；
The corrugated plating is located at the steel waist rail in the following, being connect with the steel waist rail by the connector；
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
Steel waist rail is pre-tightened.
4. half backfill formula shield cutter inspection-pit assembly construction method according to claim 3, which is characterized in that described
In method, in the conventional section of excavated inspection-pit, the more Pin routines section assembled supportings of layering setting in the inspection-pit excavated
Structure includes as the borehole wall supporting of the inspection-pit：
(1) when the conventional section of stage excavation inspection-pit, first of steel waist rail is set up after earth excavation, with connector by first of steel
Waist rail is connect with the prefabricated steel collar tie beam of assembled fore shaft coil assembly；
(2) after setting up first of steel 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 steel waist rail, this layer of corrugated plating is connect fastening with the waist rail of steel together above it,
Neighbouring one of steel waist rail and one layer of corrugated plating forms a Pin assembled supporting construction；
(3) assembled lower one of steel waist rail, the roads Bing Jianggai steel waist rail are connect with the corrugated plating for the closing cyclization that top assembly is completed, phase
The assembled seam of adjacent twice steel waist rail is staggered, and the assembled seam of adjacent two layers corrugated plating is staggered；
(4) match in formula supporting construction in the conventional section of every Pin dresses and set up inner support；
Work progress later repeats step (3), (4), until the inspection-pit is excavated to conventional section projected depth.
5. half backfill formula shield cutter inspection-pit assembly construction method according to claim 3, which is characterized in that described
In method, in the changeover portion of excavated inspection-pit, the more Pin changeover portions assembled supportings of layering setting in the inspection-pit excavated
Structure includes as the borehole wall supporting of the inspection-pit：
(1) when the changeover portion of stage excavation inspection-pit, first of steel waist rail is set up after earth excavation, with connector by changeover portion
The roads the Di steel waist rail connection of the conventional section assembled supporting construction of one of steel waist rail and inspection-pit；
(2) after setting up first of steel waist rail, continue to excavate the soil body, every layer of cutting depth is equal to or more than the width of one of steel waist rail
Degree, one of steel waist rail under being set up below first of steel waist rail, which is connect tightly with the waist rail of steel together above it
Gu neighbouring twice steel waist rail assembly seam is staggered, adjacent twice steel waist rail forms a Pin assembled supporting construction；
(3) inner support is set up in every Pin changeover portions assembled supporting construction；
Work progress later repeats (2), (3) step, until the inspection-pit is excavated to changeover portion projected depth.
6. half backfill formula shield cutter inspection-pit assembly construction method according to claim 3, which is characterized in that described
In method, borehole wall branch of the more Pin shields section assembled supporting construction of layering setting as the inspection-pit in the inspection-pit excavated
Shield includes：
(1) when the shield section of stage excavation inspection-pit, first of steel waist rail is set up after earth excavation, with connector by shield section
The roads the Di steel waist rail connection of the changeover portion assembled supporting construction of one of steel waist rail and inspection-pit；
(2) after setting up first of steel 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 steel waist rail, this layer of corrugated plating is connect fastening with the waist rail of steel together above it,
Neighbouring one of steel waist rail and one layer of corrugated plating forms a Pin assembled supporting construction；
(3) assembled lower one of steel waist rail, the roads Bing Jianggai steel waist rail are connect with the corrugated plating for the closing cyclization that top assembly is completed；
Half backfill region of shield section is that neat seam is set with the whole steel waist rails and corrugated plating for not backfilling region junction, remaining position
The assembled seam of adjacent twice steel waist rail is staggered, and the assembled seam of the adjacent two layers corrugated plating of remaining position is staggered；
(4) match in formula supporting construction in the conventional section of every Pin dresses and set up inner support；
Work progress later repeats step (3), (4), until the inspection-pit is excavated to shield section projected depth.
7. backfilling formula shield cutter inspection-pit assembly construction method, feature according to claim 3 to 6 any one of them half
It is, in the method, in conventional section assembled supporting construction and shield section assembled supporting construction, adjacent twice steel waist
A longitudinal short column is connected on beam, and sets up two layers of inner support；According to formation condition at interval of a distance in corrugated plating behind
Backfill slip casting；A longitudinal connecting member is connected on six adjacent steel waist rails；
In the method, a longitudinal short column is connected in changeover portion assembled supporting construction, on adjacent twice steel waist rail, and
Set up two layers of inner support.
8. half backfill formula shield cutter inspection-pit assembly construction method according to claim 7, which is characterized in that described
Longitudinal connecting member uses channel steel, and the steel waist rail of six longitudinally adjacent Pin assembled supporting construction is connected together.
9. half backfill formula shield cutter inspection-pit assembly construction method according to any one of claims 1 to 6, feature
It is, in the method, includes in the bottom assembly assembled steel back cover of the inspection-pit：
When the inspection-pit is excavated to projected depth, substrate is flattened, is laid with bed course, back cover steel plate is laid on bed course, is being sealed
It is laid with horizontally-supported on the steel plate of bottom, is horizontally supported between end and the waist rail of bottom and is bolted to connection, back cover steel plate
With it is horizontally-supported between be connected and fixed.
10. half backfill formula shield cutter inspection-pit assembly construction method according to claim 9, which is characterized in that institute
Back cover steel plate is stated using the field-installed prefabricated steel of energy；
It is described horizontally-supported using I-steel.
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| CN201810468550.4A CN108643917B (en) | 2018-05-16 | 2018-05-16 | Semi-backfill type shield cutter head maintenance well assembly type construction method |
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| CN201810468550.4A CN108643917B (en) | 2018-05-16 | 2018-05-16 | Semi-backfill type shield cutter head maintenance well assembly type construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161476A (en) * | 2012-10-26 | 2013-06-19 | 中铁隧道集团有限公司 | Mechanical shaft-forming method of shield cutterhead maintenance shaft in tunnel and underground construction |
| CN103615253A (en) * | 2013-11-21 | 2014-03-05 | 中国地质大学（北京） | Shield cutter head overhaul working well support device and equipment |
| CN103806916A (en) * | 2012-11-07 | 2014-05-21 | 北京市市政四建设工程有限责任公司 | Process for constructing shield rapid inspection shaft |
| CN105569666A (en) * | 2016-01-20 | 2016-05-11 | 铁道第三勘察设计院集团有限公司 | Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing |
| CN106640098A (en) * | 2017-01-02 | 2017-05-10 | 姜智彬 | Shield construction method for subway tunnel |
| CN107387090A (en) * | 2017-09-10 | 2017-11-24 | 沈阳建筑大学 | Deep layer tunnel shaft is accessed with water purification desilting function |
-
2018
- 2018-05-16 CN CN201810468550.4A patent/CN108643917B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161476A (en) * | 2012-10-26 | 2013-06-19 | 中铁隧道集团有限公司 | Mechanical shaft-forming method of shield cutterhead maintenance shaft in tunnel and underground construction |
| CN103806916A (en) * | 2012-11-07 | 2014-05-21 | 北京市市政四建设工程有限责任公司 | Process for constructing shield rapid inspection shaft |
| CN103615253A (en) * | 2013-11-21 | 2014-03-05 | 中国地质大学（北京） | Shield cutter head overhaul working well support device and equipment |
| CN105569666A (en) * | 2016-01-20 | 2016-05-11 | 铁道第三勘察设计院集团有限公司 | Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing |
| CN106640098A (en) * | 2017-01-02 | 2017-05-10 | 姜智彬 | Shield construction method for subway tunnel |
| CN107387090A (en) * | 2017-09-10 | 2017-11-24 | 沈阳建筑大学 | Deep layer tunnel shaft is accessed with water purification desilting function |
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