CN107338798A - Recoverable module deep foundation pit construction technique, recoverable module and deep foundation pit support - Google Patents
Recoverable module deep foundation pit construction technique, recoverable module and deep foundation pit support Download PDFInfo
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- CN107338798A CN107338798A CN201710708617.2A CN201710708617A CN107338798A CN 107338798 A CN107338798 A CN 107338798A CN 201710708617 A CN201710708617 A CN 201710708617A CN 107338798 A CN107338798 A CN 107338798A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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Abstract
The invention provides a kind of recoverable module deep foundation pit construction technique, recoverable module and deep foundation pit support, belong to deep pit digging support technology field, comprise the following steps：Lower digging foundation ditch；Into first of anchor cable hole, first of anchor cable is put into, stop grouting plug, grouting are installed；Into second anchor cable hole, second anchor cable is put into, stop grouting plug, grouting are installed；Module and connection fastener are installed；Prestressing force is applied to first of anchor cable and second anchor cable, forms first layer supporting；Repeat above-mentioned formation multilayer supporting；Module, anchor cable and the connection fastener of last layer of supporting, then backfill are reclaimed to the bottom surface of layer supporting second from the bottom, until recovery first layer supporting.The present invention carries out supporting and retaining system to deep basal pit surrounding soil jointly using module and anchor cable, the recyclable recycling of module, reduces waste of material and construction cost.
Description
Technical field
The invention belongs to deep pit digging support technology field, is to be related to a kind of recoverable moduleization depth more specifically
Foundation pit construction technique, recoverable module and deep foundation pit support for the construction technology.
Background technology
In construction project, because building buried depth and underground garage, equipment room the reason such as utilize with room, the underground space,
Generally require to excavate the soil body, surrounding building, road, pipeline and the safety during foundation pit construction during in order to ensure to excavate,
Need to carry out supporting and retaining system to excavating the soil body on the outside of scope, it is ensured that deep pit monitor.Supporting and retaining system system is mostly using disposable stake, soil at present
Wall or both combination is followed closely, treats just to lose effect after the completion of foundation ditch backfill, due to not recyclable, causes waste of material.
Meanwhile architecture Foundation Pit Engineering is provisional engineering, national regulation provides that general service life is 1 year, positive reason
The stake life-span of supporting and retaining system can reach decades or longer under condition, and being embedded in underground can not reuse, and cause unnecessary material
Material wastes, and anchor pole or anchor cable take the periphery underground space in addition, and giving rear perimeter edge, project under construction impacts again.
The content of the invention
It is an object of the invention to provide a kind of recoverable module deep foundation pit construction technique, to solve to deposit in the prior art
System of deep foundation pit support in the not recyclable technical barrier for causing waste of material and successive projects being impacted of component.
To achieve the above object, the technical solution adopted by the present invention is：A kind of recoverable module deep foundation pit construction is provided
Technique, comprise the following steps：
Step 1: lower digging foundation ditch；
Step 2: into first of anchor cable hole, first of anchor cable is put into, stop grouting plug, grouting are installed；
Step 3: into second anchor cable hole, second anchor cable is put into, stop grouting plug, grouting are installed；
Step 4: installation module and connection fastener；
Step 5: applying prestressing force to first of anchor cable and second anchor cable, first layer supporting is formed；
Step 6: repeat step one forms multilayer supporting to step 5；
Step 7: backfill to the bottom surface of last layer of supporting, discharges last one of anchor cable and road anchor cable second from the bottom
Prestressing force, reclaims module, anchor cable and the connection fastener of last layer of supporting, then backfill is to the bottom surface of layer supporting second from the bottom；
Step 8: repeat step seven to recovery first layer supporting.
Further, in step 1, lower digging foundation ditch depth H millimeters；
In step 2, the position of deep h millimeters below foundation ditch top surface, multiple institutes are set along foundation ditch surrounding inwall same level
First of anchor cable hole is stated, and makes the centre-to-centre spacing of first of the anchor cable hole of adjacent on same inwall two be L millimeters, it is same
The center of outermost two first of anchor cable holes is respectively S millis with the distance of the intersecting lens of two adjacent inwalls on inwall
Meter, first of anchor cable is set respectively in each described first of anchor cable hole；
In step 3, the position of the center M millimeters away from first of anchor cable hole, set along foundation ditch surrounding inwall same level
With first of anchor cable hole second anchor cable hole correspondingly, set respectively in each described second anchor cable hole
The second anchor cable；
In step 4, the size of the module is L × M millimeters, and supporting is in two adjacent first of anchor cables and one
On the square inwall that the second anchor cable corresponding to one is formed, the module is fastened by anchor head and connection fastener；
In step 6, the supporting when excavating, each cutting depth is M millimeters, until design of foundation pit depth, forms multilayer film
Block supporting.
Further, in step 1, lower digging foundation ditch depth H is 4000-4500mm；
In step 2, deep h below foundation ditch top surface is 100-200 millimeters, on same inwall it is adjacent two described first
The centre-to-centre spacing L of anchor cable hole is 1000-3000mm millimeters, on same inwall in outermost two first of anchor cable holes
The heart is respectively 400-500 millimeters with the distance S of the intersecting lens of two adjacent inwalls；
In step 6, each cutting depth M is 1000-4000mm, and last one of the anchor cable formed is apart from bottom of foundation ditch
100-200 millimeters.
Further, in step 5, the 105%-110% that prestressing force reaches design load is applied to first of anchor cable, to second
Road anchor cable applies prestressing force to the 30% of design load；During second layer supporting, apply prestressing force to second anchor cable up to design load
105%-110%, to the 3rd anchor cable application prestressing force to the 30% of design load, later each layer of supporting the like.
The beneficial effect of recoverable module deep foundation pit construction technique provided by the invention is：Compared with prior art,
Recoverable module deep foundation pit construction technique of the present invention, supporting and retaining system is carried out to deep basal pit surrounding soil using module and anchor cable jointly,
The recyclable recycling of module, waste of material is greatly reduced, reduce construction cost；Modular construction also causes construction reference
Change, simplify constructing operation, improve efficiency of construction while reduce labor intensity；Reduce cement concrete wet trade, subtract
Lack construction noise, realized green construction, be advantageous to environmental protection.
The present invention also aims to provide a kind of recoverable module, for the recoverable module described in any of the above-described
Deep foundation pit construction technique, including intermediate module, the intermediate module and the side module include steel plate and are welded in the steel
Plate the same face and the reinforcement laid in length and breadth, the length and width dimensions of the steel plate are L × M millimeters, and the corner of the steel plate, which is provided with, to be used
In the breach that anchor cable passes through.
Further, size L × M of the steel plate be 3000 × 4000mm, 3000 × 3000mm, 2000 × 3000mm,
Any of 1000 × 3000mm.
Further, the reinforcement is I-steel.
Further, the breach is square structure, and the length of side is 100-200 millimeters.
Further, in addition to for supporting in the top module of inwall edge, following module, left module, the right side
Side module, upper left Corner Block List Representation, lower-left Corner Block List Representation, upper right Corner Block List Representation and bottom right Corner Block List Representation, each module include steel plate and weldering
The steel plate the same face and the reinforcement laid in length and breadth are connected to, the length and width dimensions of the steel plate are L × M millimeters.
The beneficial effect of recoverable module provided by the invention is：For soil mass of foundation pit supporting, it can reclaim and repeat
Utilize, greatly reduce the waste of material and reduce construction cost, and due to modular construction, simple to operate, construction
It is time saving and energy saving, shorten the construction period.
The present invention also aims to provide a kind of deep foundation pit support, including it is multiple into line-column matrix supporting in deep basal pit four
The module of all inwalls, the tangent laying of adjacent module, two row modules and the phase of two adjacent inwalls at left and right sides of same inwall
Intersection is tangent, and each described indentation, there is provided with the vertical anchor cable for inserting inwall, and four relative modules of corner use one
Individual anchor head and a connection fastener are fixed on inwall, and the neighbouring module of same inwall is using an anchor head and a connection
Fastener is compressed and is fixed on inwall.
It is provided by the invention can the beneficial effect of deep foundation pit support be：As a result of module supporting construction, operation letter
Just, construction is time saving and energy saving, shortens the construction period for folk prescription；And make stake without using a large amount of reinforcing bars, cement and sand material
Or present walling pile, reduce the utilization of the non-renewable material such as cement, sandstone and reinforcing bar, reduce deep foundation pit support expense, reduction is applied
Work cost, be advantageous to green, sustainable development.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation of deep foundation pit support provided in an embodiment of the present invention；
Fig. 2 is Fig. 1 sectional view；
Fig. 3 is the knot of 3000 × 4000 recoverable module upper left Corner Block List Representation provided in an embodiment of the present invention and bottom right Corner Block List Representation
Structure schematic diagram；
Fig. 4 is lower-left Corner Block List Representation and upper right Corner Block List Representation in 3000 × 4000 recoverable module provided in an embodiment of the present invention
Structural representation；
Fig. 5 is the structure of left module and the right module in 3000 × 4000 recoverable module provided in an embodiment of the present invention
Schematic diagram；
Fig. 6 is the structure of top module and following module in 3000 × 4000 recoverable module provided in an embodiment of the present invention
Schematic diagram；
Fig. 7 is the structural representation of intermediate module in 3000 × 4000 recoverable module provided in an embodiment of the present invention；
Fig. 8 is the knot of 3000 × 3000 recoverable module upper left Corner Block List Representation provided in an embodiment of the present invention and bottom right Corner Block List Representation
Structure schematic diagram；
Fig. 9 is lower-left Corner Block List Representation and upper right Corner Block List Representation in 3000 × 3000 recoverable module provided in an embodiment of the present invention
Structural representation；
Figure 10 is left module and the knot of the right module in 3000 × 3000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 11 is the knot of top module and following module in 3000 × 3000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 12 is the structural representation of intermediate module in 3000 × 3000 recoverable module provided in an embodiment of the present invention；
Figure 13 is 2000 × 3000 recoverable module upper left Corner Block List Representation provided in an embodiment of the present invention and bottom right Corner Block List Representation
Structural representation；
Figure 14 is lower-left Corner Block List Representation and upper right Corner Block List Representation in 2000 × 3000 recoverable module provided in an embodiment of the present invention
Structural representation；
Figure 15 is left module and the knot of the right module in 2000 × 3000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 16 is the knot of top module and following module in 2000 × 3000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 17 is the structural representation of intermediate module in 2000 × 3000 recoverable module provided in an embodiment of the present invention；
Figure 18 is the knot of top module and following module in 3000 × 2000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 19 is 3000 × 2000 recoverable module upper left Corner Block List Representation provided in an embodiment of the present invention and bottom right Corner Block List Representation
Structural representation；
Figure 20 is lower-left Corner Block List Representation and upper right Corner Block List Representation in 3000 × 2000 recoverable module provided in an embodiment of the present invention
Structural representation；
Figure 21 is 1000 × 3000 recoverable module upper left Corner Block List Representation provided in an embodiment of the present invention and bottom right Corner Block List Representation
Structural representation；
Figure 22 is lower-left Corner Block List Representation and upper right Corner Block List Representation in 1000 × 3000 recoverable module provided in an embodiment of the present invention
Structural representation；
Figure 23 is left module and the knot of the right module in 1000 × 3000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 24 is the knot of top module and following module in 1000 × 3000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram；
Figure 25 is 3000 × 1000 recoverable module upper left Corner Block List Representation provided in an embodiment of the present invention and bottom right Corner Block List Representation
Structural representation；
Figure 26 is lower-left Corner Block List Representation and upper right Corner Block List Representation in 3000 × 1000 recoverable module provided in an embodiment of the present invention
Structural representation；
Figure 27 is the knot of top module and following module in 3000 × 1000 recoverable module provided in an embodiment of the present invention
Structure schematic diagram.
Wherein, each reference in figure：
1- modules；11- steel plates；12- reinforcements；2- anchor heads；3- connection fasteners；4- anchor cables；5- breach；6- preformed holes.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Drawings and Examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, it can be directly another
On one element or it is connected on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", " on ", " under ", "front", "rear", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " top ", " bottom " " interior ", " outer " are to be closed based on orientation shown in the drawings or position
System, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must have
Specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
Fig. 1 and Fig. 2 is referred to, now recoverable module deep foundation pit construction technique provided by the invention is illustrated.Institute
Recoverable module deep foundation pit construction technique is stated, including a kind of recoverable module deep foundation pit construction technique is provided, including it is as follows
Step：
Step 1: lower digging foundation ditch；
Step 2: into first of anchor cable hole, first of anchor cable is put into, stop grouting plug, grouting are installed；
Step 3: into second anchor cable hole, second anchor cable is put into, stop grouting plug, grouting are installed；
Step 4: installation module 1 and connection fastener；
Step 5: applying prestressing force to first of anchor cable and second anchor cable, first layer supporting is formed；
Step 6: repeat step one forms multilayer supporting to step 5；
Step 7: backfill to the bottom surface of last layer of supporting, discharges last one of anchor cable and road anchor cable second from the bottom
Prestressing force, reclaims module 1, anchor cable and the connection fastener of last layer of supporting, then backfill is to the bottom surface of layer supporting second from the bottom；
Step 8: repeat step seven to recovery first layer supporting.
Recoverable module deep foundation pit construction technique provided by the invention, compared with prior art, module pass through anchor cable, company
Clasp and anchor head carry out supporting and retaining system to deep basal pit surrounding soil jointly, when foundation ditch backfills, remove simultaneously recycling module and anchor cable, weight
The waste in other pattern foundation pit supporting structures, greatly reducing material is multiplexed, reduces deep foundation pit support expense and construction cost, makes to apply
Work is convenient, safe and reliable；Due to using module carry out deep foundation pit supporting construction, when carrying out deep foundation pit supporting construction, only need by
Module supporting fastens on the soil body of excavation and with anchor cable and periphery basis, and the supporting when excavating, and simplifies constructing operation, contracts
The short construction period, and make construction standardization；Constructed using recoverable module, showed without using a large amount of reinforcing bars, cement and sand material
Field makes stake or present walling pile, reduces the utilization of the expendable material such as cement, sandstone and reinforcing bar, reduces deep foundation pit support and takes
With reduction construction cost；Due to using module construction, reducing the mix of cement, sandstone, wet trade reduction, realizing green
Construction, is advantageous to environmental protection.
Wherein, the aperture of anchor cable hole is preferably 100mm, 150mm etc..
Further, also referring to Fig. 1 to Fig. 2, as recoverable module deep foundation pit construction work provided by the invention
A kind of embodiment of skill, in step 1, lower digging foundation ditch depth H millimeters；
In step 2, the position of deep h millimeters below foundation ditch top surface, multiple institutes are set along foundation ditch surrounding inwall same level
First of anchor cable hole is stated, and makes the centre-to-centre spacing of first of the anchor cable hole of adjacent on same inwall two be L millimeters, it is same
The center of outermost two first of anchor cable holes is respectively S millis with the distance of the intersecting lens of two adjacent inwalls on inwall
Meter, first of anchor cable is set respectively in each described first of anchor cable hole；
In step 3, the position of the center M millimeters away from first of anchor cable hole, set along foundation ditch surrounding inwall same level
With first of anchor cable hole second anchor cable hole correspondingly, set respectively in each described second anchor cable hole
The second anchor cable；
In step 4, the size of the module 1 is L × M millimeters, and supporting is in two adjacent first of anchor cables and one
On the square inwall that the second anchor cable corresponding to one is formed, the module 1 is fastened by anchor head and connection fastener；
In step 6, the supporting when excavating, each cutting depth is M millimeters, until design of foundation pit depth, forms multilayer film
Block supporting.
Each size can be adjusted according to design of deep foundation pit parameter in above-mentioned, ensure that inwall does not stay complementary angle in supporting
And gap, completely by module supporting.
Further, Fig. 1 to Fig. 2 is referred to, is applied as recoverable module deep basal pit provided by the invention
A kind of embodiment of work technique, in step 1, lower digging foundation ditch depth H is 4000-4500mm；
In step 2, deep h below foundation ditch top surface is 100-200 millimeters, on same inwall it is adjacent two described first
The centre-to-centre spacing L of anchor cable hole is 1000-3000mm millimeters, on same inwall in outermost two first of anchor cable holes
The heart is respectively 400-500 millimeters with the distance S of the intersecting lens of two adjacent inwalls；
In step 6, each cutting depth M is 1000-4000mm, and last one of the anchor cable formed is apart from bottom of foundation ditch
100-200 millimeters.Here, last one of anchor cable reserves a certain distance with bottom of foundation ditch, is easy for last one of anchor cable hole
Prepare, the installation of last layer of supporting, similarly, for example, in first layer supporting, second anchor cable hole and corresponding excavation pit
Bottom surface between be also required to leave a certain distance, in order to second anchor cable hole preparation and first layer module 1 installation.
Further, refering to Fig. 1 and Fig. 2, one as recoverable module deep foundation pit construction technique provided by the invention
Kind of embodiment, in step 5, apply the 105%-110% that prestressing force reaches design load to first of anchor cable, to second
Anchor cable applies prestressing force to the 30% of design load；During second layer supporting, apply prestressing force to second anchor cable up to design load
105%-110%, to the 3rd anchor cable application prestressing force to the 30% of design load, later each layer of supporting the like.Here,
Because second layer module does not have supporting also, it also requires the module of first layer is fixed, it is necessary to certain to second anchor cable
Prestressing force, after second layer module supporting, corner is pushed down with connection fastener, then apply prestressing force reach design load 105%-
110%.
The present invention also aims to provide a kind of recoverable module, Fig. 3 to Figure 27 is referred to, for any of the above-described institute
The recoverable module deep foundation pit construction technique stated, including intermediate module, the intermediate module and the side module include steel
Plate and the same face of steel plate 11 and the reinforcement 12 laid in length and breadth being welded in, the length and width dimensions of the steel plate are L × M millimeters,
The corner of the steel plate, which is provided with, is used for the breach 5 that anchor cable passes through.Wherein, indentation, there passes through for anchor cable, can conveniently fasten.
The beneficial effect of recoverable module provided by the invention is：For soil mass of foundation pit supporting, it can reclaim and repeat
Utilize, greatly reduce the waste of material and reduce construction cost, and due to modular construction, simple to operate, construction
It is time saving and energy saving, shorten the construction period.
Further, Fig. 3 to Figure 27 is referred to, size L × M of the steel plate is 3000 × 4000mm (see Fig. 3-Fig. 7),
3000 × 3000mm (see Fig. 8-Figure 12), 2000 × 3000mm (see Figure 13-Figure 17), 1000 × 3000mm (see Figure 20-Figure 24)
Any of, accompanying drawing additionally provides 3000 × 2000mm (see Figure 18-Figure 20), 3000 × 1000mm (see Figure 25-Figure 27) rule
The module of lattice.
Further, Fig. 3 to Figure 27 is referred to, the reinforcement is I-steel.
Further, Fig. 3 to Figure 27 is referred to, the breach is square structure, and the length of side is 100-200 millimeters.It is preferred that
The length of side of breach is 100mm.
Further, Fig. 3 is referred to Figure 27, in addition to for supporting in the top module, following of inwall edge
Module, left module, the right module, upper left Corner Block List Representation, lower-left Corner Block List Representation, upper right Corner Block List Representation and bottom right Corner Block List Representation, each mould
Block includes steel plate and is welded in the steel plate the same face and the reinforcement laid in length and breadth, and the length and width dimensions of the steel plate are L × M
Millimeter.Wherein, the module of inwall the right and left is arranged on for these, anchor cable hole is beaten for convenience and is easily installed, on side
The anchor cable hole that side is beaten keeps certain spacing with the vertical the right and left of inwall；Moreover, for for installed in inwall surrounding
The module on edge, its edge is settable to be easy to anchor cable to pass through preformed hole 6.
The present invention also aims to provide a kind of deep foundation pit support, referring to Fig. 1 and Fig. 2, including it is multiple into line-column matrix
Supporting is in the module 1 of deep basal pit surrounding inwall, adjacent 1 tangent laying of module, two row modules 1 at left and right sides of same inwall with
The intersecting lens of two adjacent inwalls is tangent, and the vertical anchor cable 4 for inserting inwall, corner phase are provided with each described breach 5
To four modules 1 be fixed on using an anchor head 2 and a connection fastener 3 on inwall, the neighbouring module of same inwall
Compress and be fixed on inwall using an anchor head and a connection fastener.
, can be with from Fig. 1, Fig. 3 and Fig. 6 by taking the module of 3000 × 4000mm specifications as an example there is also the need to explanation
Find out, in the top module of first layer supporting, first of anchor cable hole is in the centre position of breach, and second anchor cable hole is in
The intersecting position of bilevel module, therefore, the hole heart of first of anchor cable hole and second anchor cable hole away from less than 4000mm,
But 4000mm subtracts breach center to the distance of module upper edge, the supporting of last layer is identical with first layer supporting, and in
Between supporting module, the hole heart between anchor cable hole is away from being 4000mm.Because module in an intermediate position, is one
Connection fastener press four modules, and upper following module, such as first of anchor cable and finally together with anchor cable, if placed at module
Edge on, then the effect that compresses can difference, and be arranged in breach, then connection fastener and the contact surface of module can be bigger,
The effect of compression can be quite a lot of.
The beneficial effect of the recyclable deep foundation pit support of modularization provided by the invention is：Applied as a result of module supporting
Work, simple to operate, construction is time saving and energy saving, shortens the construction period；And show without using a large amount of reinforcing bars, cement and sand material
Field makes stake or present walling pile, reduces the utilization of the non-renewable material such as cement, sandstone and reinforcing bar, reduces deep foundation pit support and takes
With reduction construction cost.
Below by taking 12m deep basal pits as an example, specifically comprise the following steps：
Step 1: using mechanically or manually excavating, every layer of cutting depth determines according to capacity of equipment, excavates 4000mm and is
One step, from foundation ditch side excavate, by design angle while dig it is artificial while Xiu Po；
Step 2: using anchor cable machine or manually in below ground foundation ditch inwall 100mm position levels into first of anchor cable
Hole, aperture 150mm, depth press design requirement, are manually placed into Recyclable anchor rope, lay stop grouting plug, cement mortar of pouring water, cement：Sand
Mass ratio be 1.2:1, water ash mass ratio is 1:0.4, add 10% swelling agent, 5% water reducer；
Preferably, it is located at domatic, vertical direction by design of foundation pit depth and length and width dimensions, cloth hole, first of anchor cable hole exists
100mm below ground location, on the inside of foundation ditch, horizontal pore-forming, tilt for 0 degree of angle, horizontal direction the right and left and upper and lower corner it is attached
Nearly anchor cable hole is from side, angular distance 500mm；
Step 3: design requirement is being pressed into second anchor cable hole, aperture 150mm, depth apart from ground 3000mm positions, under
Recyclable anchor rope, lay stop grouting plug, cement mortar of pouring water, cement：Sand mass ratio is 1.2:1, water ash mass ratio is 1:0.4, add
10% swelling agent, 5% water reducer；
Preferably, anchor cable uses steel strand wires, and typically selecting one to three is advisable, and elongatedness direction sets circle every 1 meter
Support, ensure anchor cable in hole centre position；
Wherein, first, second anchor cable hole can be carried out simultaneously, and last one of anchor cable should be in foundation ditch bottom surface above 100mm positions
Put, in order to the preparation of last one of anchor cable hole, the final step earthwork determines according to design of foundation pit depth.
Step 4: installation sizing module and connection fastener, according to foundation ditch size, last layer of side, angle and bottom of foundation ditch mould
Block uses off-standard size, for example with upper left Corner Block List Representation, bottom right Corner Block List Representation, lower-left Corner Block List Representation, upper right Corner Block List Representation, left and right Bian Mo
Block and upper following module, centre use 3000 × 3000mm of standard size, according to foundation ditch dimension combination, junction button when module is installed
Part is installed simultaneously, and flatness is adjusted in installation；
Step 5: module adjustment it is smooth after, start apply prestressing force, apply prestressing force when should uniformly slowly, to same mould
Anchor cable on block, which applies prestressing force, to be carried out simultaneously；
Step 6: repeat two, three, four, five rapid, two, three, four layers of module of formation and three, four, five anchor cables, completion foundation ditch
Support system is constructed；
Step 7: support system can is removed when more than main body construction to ground, first backfill to the 4th layer of module
Bottom surface, the 4th anchor cable and the 5th prestressd anchor cable are discharged, then remove the 4th layer of module, reclaim the 5th anchor cable；
Backfill is using dirt or element soil, and free from foreign meter, backfill soil property amount will meet country, save quality requirement, by setting
Match ratio construction is counted, compacting uses cal rolling or hand compaction, and compactness is not less than 0.95；
Step 8: repeat step seven, the backfill earthwork to designed elevation.
It should be noted that cutting depth is less than or equal to 12 meters, it is adapted to more than level of ground water, the domatic slope of foundation ditch is not less than
5 degree of angles, soil layer Self-standing height are not less than cutting depth.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. recoverable module deep foundation pit construction technique, it is characterised in that comprise the following steps：
Step 1: lower digging foundation ditch；
Step 2: into first of anchor cable hole, first of anchor cable is put into, stop grouting plug, grouting are installed；
Step 3: into second anchor cable hole, second anchor cable is put into, stop grouting plug, grouting are installed；
Step 4: installation module and connection fastener；
Step 5: applying prestressing force to first of anchor cable and second anchor cable, first layer supporting is formed；
Step 6: repeat step one forms multilayer supporting to step 5；
Step 7: backfill discharges last one of anchor cable and the pre- of road anchor cable second from the bottom should to the bottom surface of last layer of supporting
Power, reclaims module, anchor cable and the connection fastener of last layer of supporting, then backfill is to the bottom surface of layer supporting second from the bottom；
Step 8: repeat step seven to recovery first layer supporting.
2. recoverable module deep foundation pit construction technique as claimed in claim 1, it is characterised in that：In step 1, lower digging base
Cheat deep H millimeters；
In step 2, the position of deep h millimeters below foundation ditch top surface, multiple described the are set along foundation ditch surrounding inwall same level
One of anchor cable hole, and make the centre-to-centre spacing of first of the anchor cable hole of adjacent on same inwall two be L millimeters, same inwall
The center of upper outermost two first of anchor cable holes is respectively S millimeters with the distance of the intersecting lens of two adjacent inwalls,
First of anchor cable is set respectively in each described first of anchor cable hole；
In step 3, the position of the center M millimeters away from first of anchor cable hole, along the setting of foundation ditch surrounding inwall same level and institute
State first of anchor cable hole second anchor cable hole correspondingly, set respectively in each described second anchor cable hole described in
Second anchor cable；
In step 4, the size of the module is L × M millimeters, and supporting is in two adjacent first of anchor cables and one a pair
On the square inwall that the second anchor cable answered is formed, the module is fastened by anchor head and connection fastener；
In step 6, the supporting when excavating, each cutting depth is M millimeters, until design of foundation pit depth, forms multilayer module branch
Shield.
3. recoverable module deep foundation pit construction technique as claimed in claim 2, it is characterised in that：In step 1, lower digging base
It is 4000-4500mm to cheat deep H；
In step 2, deep h below foundation ditch top surface is 100-200 millimeters, two adjacent first of anchor cables on same inwall
The centre-to-centre spacing L in hole is 1000-3000mm millimeters, the center point of outermost two first of anchor cable holes on same inwall
It is 400-500 millimeters not with the distance S of the intersecting lens of two adjacent inwalls；
In step 6, each cutting depth M is 1000-4000mm, and last one of the anchor cable formed is apart from bottom of foundation ditch 100-
200 millimeters.
4. recoverable module deep foundation pit construction technique as claimed in claim 1, it is characterised in that：In step 5, to first
Road anchor cable applies the 105%-110% that prestressing force reaches design load, applies prestressing force to second anchor cable to the 30% of design load；Second
During layer supporting, apply the 105%-110% that prestressing force reaches design load to second anchor cable, prestressing force is applied to setting to the 3rd anchor cable
The 30% of evaluation, later each layer of supporting the like.
5. recoverable module, for the recoverable module deep foundation pit construction technique any one of claim 1-4, it is special
Sign is：Including the intermediate module that length and width dimensions are L × M millimeters, the intermediate module includes steel plate and is welded in the steel plate
The same face and the reinforcement laid in length and breadth, the length and width dimensions of the steel plate are L × M millimeters, and the corner of the steel plate, which is provided with, to be used for
The breach that anchor cable passes through.
6. recoverable module as claimed in claim 5, it is characterised in that：Size L × M of the intermediate module be 3000 ×
Any of 4000mm, 3000 × 3000mm, 2000 × 3000mm, 1000 × 3000mm.
7. recoverable module as claimed in claim 5, it is characterised in that：The reinforcement is I-steel.
8. recoverable module as claimed in claim 5, it is characterised in that：The breach is square structure, length of side 100-
200 millimeters.
9. recoverable module as claimed in claim 5, it is characterised in that：Also include being used for supporting in inwall edge
Side module, following module, left module, the right module, upper left Corner Block List Representation, lower-left Corner Block List Representation, upper right Corner Block List Representation and bottom right angle mould
Block, each module include steel plate and are welded in the steel plate the same face and the reinforcement laid in length and breadth, the length of the steel plate
Wide size is L × M millimeters.
10. deep foundation pit support, it is characterised in that：Including multiple recoverable modules as any one of claim 5-9, institute
Module is stated into line-column matrix supporting in deep basal pit surrounding inwall, the adjacent tangent laying of the module, the same inwall left and right sides
Two row modules and the intersecting lens of two adjacent inwalls it is tangent, each described indentation, there is provided with the vertical anchor for inserting inwall
Rope, four relative modules of corner are fixed on inwall using an anchor head and a connection fastener, above and below same inwall
Adjacent module is fixed on inwall using an anchor head and a connection fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708617.2A CN107338798A (en) | 2017-08-17 | 2017-08-17 | Recoverable module deep foundation pit construction technique, recoverable module and deep foundation pit support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708617.2A CN107338798A (en) | 2017-08-17 | 2017-08-17 | Recoverable module deep foundation pit construction technique, recoverable module and deep foundation pit support |
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| CN107338798A true CN107338798A (en) | 2017-11-10 |
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| CN201710708617.2A Pending CN107338798A (en) | 2017-08-17 | 2017-08-17 | Recoverable module deep foundation pit construction technique, recoverable module and deep foundation pit support |
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Cited By (3)
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| CN108049411A (en) * | 2017-11-22 | 2018-05-18 | 浙江海洋大学 | A kind of foundation pit protective stent of high safety performance |
| CN108643224A (en) * | 2018-06-11 | 2018-10-12 | 北京爱地地质勘察基础工程公司 | A kind of assembled soil nailed wall retaining structure and its construction method |
| CN109371984A (en) * | 2018-12-21 | 2019-02-22 | 王维玉 | A kind of bracing of deep foundation pit and its construction technology that pin-connected panel is recyclable |
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| CN103147449A (en) * | 2013-03-07 | 2013-06-12 | 河海大学 | Partition-anchoring press plate type slope protection brick structure and construction laying method thereof |
| CN103614988A (en) * | 2013-12-07 | 2014-03-05 | 黄靓 | Flexible scour-preventing protective cushion and construction method thereof |
| CN104947684A (en) * | 2015-05-27 | 2015-09-30 | 山东大学 | Soil nailing wall supporting construction method based on assembly type recoverable process |
| CN205822135U (en) * | 2016-07-15 | 2016-12-21 | 江阴市祝塘水利农机管理服务站 | The ecological revetment of wind and wave resistance landslide-proofing |
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| CN103147449A (en) * | 2013-03-07 | 2013-06-12 | 河海大学 | Partition-anchoring press plate type slope protection brick structure and construction laying method thereof |
| CN103614988A (en) * | 2013-12-07 | 2014-03-05 | 黄靓 | Flexible scour-preventing protective cushion and construction method thereof |
| CN104947684A (en) * | 2015-05-27 | 2015-09-30 | 山东大学 | Soil nailing wall supporting construction method based on assembly type recoverable process |
| CN205822135U (en) * | 2016-07-15 | 2016-12-21 | 江阴市祝塘水利农机管理服务站 | The ecological revetment of wind and wave resistance landslide-proofing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049411A (en) * | 2017-11-22 | 2018-05-18 | 浙江海洋大学 | A kind of foundation pit protective stent of high safety performance |
| CN108643224A (en) * | 2018-06-11 | 2018-10-12 | 北京爱地地质勘察基础工程公司 | A kind of assembled soil nailed wall retaining structure and its construction method |
| CN109371984A (en) * | 2018-12-21 | 2019-02-22 | 王维玉 | A kind of bracing of deep foundation pit and its construction technology that pin-connected panel is recyclable |
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