CN104895089B - Basement floor and the construction method of the cooperative permanent support system of support pile - Google Patents
Basement floor and the construction method of the cooperative permanent support system of support pile Download PDFInfo
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- CN104895089B CN104895089B CN201510162771.5A CN201510162771A CN104895089B CN 104895089 B CN104895089 B CN 104895089B CN 201510162771 A CN201510162771 A CN 201510162771A CN 104895089 B CN104895089 B CN 104895089B
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Abstract
The invention discloses basement floor and the construction method of the cooperative permanent support system of support pile, the system includes foundation pit supporting pile and depends on the components such as the overhanging support of level, the waist rail of basement floor construction.Above-mentioned support pile uses prestressed cable anchorage in the excavation of foundation pit stage, and the basement construction stage, supporting structure system forever played a role with agent structure by setting permanent overhanging support to substitute the horizontal applied force that anchor pole undertakes support pile.The present invention can change provisional foundation pit supporting construction permanently to descend supporting construction as a kind of new underground space support system, make full use of material property, reduce construction costs, protect underground environment.
Description
Technical field
The invention belongs to industry and civil buildings foundation field, more particularly to basement floor and the common work of support pile
The construction method of the permanent support system of work.
Background technology
In deep foundation pit of construction engineering field, the piled anchor foundation pit supporting construction based on cast-in-situ bored pile is as main provisional
One of pattern foundation pit supporting structure form, significant wastage is caused to construction material and social resources.In traditional design thinking, base pit engineering belongs to
Provisional is working measure, and Design of Main Structure is often ahead of the design of foundation pit supporting construction, causes in design process both
Disconnection.Permanent foundation pit supporting system based on cast-in-situ bored pile is by permanent overhanging support, by agent structure underground
Part is combined with concrete support stake, forms main body under ground portion horizontal structure and support system shared rock and soil pressure
Horizontal Path of Force Transfer and Lateral Resistant System.New technology will effectively reduce construction costs, economize on resources, environmental protection, promote city
The sustainable development that city is built.
The content of the invention
To solve the above problems, the present invention provides a kind of：It is permanent to change existing provisional foundation pit supporting construction system
Property foundation pit supporting construction system, the basement floor and support pile for giving full play to the permanent effect of support system is cooperative
The construction method of permanent support system.
To achieve these goals, the present invention is adopted the following technical scheme that：
Overhanging support is set between outer wall of basement and support pile, and the overhanging support includes the overhanging support of Base isolation system
With the overhanging support of agent structure, the overhanging support of the Base isolation system is located in Base isolation system plane, two ends respectively with Base isolation system
With support pile connection；The overhanging support of agent structure is in the beam slab plane of each layer corresponding height, its one end and body junction
The beams and slabs connection of structure, the other end is connected by waist rail with support pile；The support pile is in the overhanging support of agent structure and waist
A part of the connection as the permanent support system in underground for beam.
The support pile uses concrete drilling bored concrete pile, and the underground space structure of the agent structure is at least one layer of.
In the waist rail and each layer beam slab of agent structure are generally aligned in the same plane, the waist rail passes through built-in fitting and support pile
Connection, the waist rail is reinforced concrete structure.
The overhanging support of Base isolation system is plain concrete support.
The upper surface of the overhanging support of Base isolation system is flushed with raft plate surface.
The bottom processing of the overhanging support of Base isolation system includes the thick plain concrete cushion layers of bottom 200mm, and on bed course
Portion's backfill level matches somebody with somebody good rubble, middle sand.
The overhanging support of agent structure is reinforced concrete support.
The overhanging support of agent structure is connected by reserved steel bar and the beams and slabs of the agent structure of corresponding height.
Filled with the backfill soil body between the outer wall of basement and support pile.
The outer wall of basement is provided with insulation water-proof layer.
Basement floor and the construction method of the cooperative permanent support system of support pile, comprise the following steps：
Step 1：Support pile is performed, excavation of foundation pit is carried out, performs the support system in excavation of foundation pit stage；
Step 2：Carry out bottom of foundation ditch bed course, construction Base isolation system and the overhanging support of Base isolation system；
Step 3：Bottom basement main structure construction is carried out, after bottom basement main structure construction, is carried out first
The overhanging support of agent structure and the construction of corresponding waist rail；
Step 4：The overhanging support of more last layer basement agent structure and the construction of corresponding waist rail are carried out successively until underground
Room first floor floor and overhanging Construction of Supporting terminate；
Step 5：The fertile groove backfill soil body of construction and compaction in layers.
Wherein, in step 1, the support system in the excavation of foundation pit stage uses the piled anchor body of concrete drilling bored concrete pile
System.
In step 1, support pile is using the stake of concrete drill hole poured support, and its work progress includes the welding of steel reinforcement cage, bored
Machine pore-forming, hang steel reinforcement cage, perfusion pile concrete, stake top Guan Liang construction, carry out anchor bolt construction.
In step 2, after the overhanging support of the Base isolation system reaches 80% design strength, remove and reclaim first of anchor
Bar.
In step 2, after the Base isolation system construction terminates, building in dead slot between cleaning raft edges of boards edge and foundation pit supporting pile
Building refuse, lays plain concrete cushion layer；Level is backfilled in the plain concrete cushion layer and matches somebody with somebody good rubble, middle sand.
In step 2, the thickness of the overhanging support of Base isolation system is not less than 500mm.
In step 3, the overhanging support of first of agent structure follows the progress of basement bottom floor slab construction, absolute altitude positioning closely
In floor level.
In step 3, after the intensity of the overhanging support of the agent structure of corresponding height reaches 80% design strength, tear open
Except the anchor pole for reclaiming corresponding height.
In step 3, waist rail is connected by built-in fitting with foundation pit supporting pile
In step 4, after basement first floor floor and overhanging Construction of Supporting terminate, carry out successively outer wall of basement waterproof,
Heat preservation construction, the fertile groove backfill soil body of construction and compaction in layers.
Beneficial effects of the present invention are：
In the present invention, the main function of overhanging support is contact agent structure and supporting construction, transmits horizontal force；Waist rail has
On the one hand retaining piles are connected as an entirety by two effects by waist rail, on the other hand, and waist rail can pass overhanging support
The concentrated force come is evenly distributed to each campshed, it is to avoid stress concentration causes structure to destroy.Pass through permanent overhanging support and waist rail
Collective effect so that support pile and underground space main body floor are combined, formed space lateral resisting structure system, and by return
Force path is enriched in power transmission of banketing.
The present invention makes every effort to agent structure System Design and dominates foundation pit supporting system design, changes conventional base pit engineering and structure
Design the present situation departed from.
The present invention realizes the permanence effect of foundation pit supporting construction on the basis of original provisional pattern foundation pit supporting structure is theoretical,
It is the tremendous increase to traditional pattern foundation pit supporting structure theory.
The present invention changes the present situation that conventional foundation pit supporting system goes out of use after underground main structure construction is finished, and realizes
Foundation pit supporting construction, to permanent transformation, saves construction cost, with reference to the recycling of anchor cable, protection ring by provisional
Border, the sustainable development for promoting urban underground space to build.
Using permanent foundation pit supporting construction form, it can effectively improve the stress of supporting construction and underground agent structure
Feature, using the reasonable mechanical of overhanging support, can replace with Recyclable anchor rope by common anchor cable, ensure the same of structure safety
When, it is cost-effective, economize on resources, more meet the theory of green building.
The invention can play a great role in the Pile-Anchor Supporting for Deep Excavation structural system widely applied, and can change existing
The provisional foundation pit supporting construction system having is permanent foundation pit supporting construction system, gives full play to the permanent work of support system
With the horizontal stress that effectively reduction agent structure outer wall of basement undertakes saves construction cost, reduces construction costs.
Brief description of the drawings
Fig. 1 is the integral structural system figure of patent of the present invention.
Fig. 2 is overhanging support, waist rail and the interdependent node construction vertical cross section detail drawing of patent of the present invention.
Fig. 3 is overhanging support, waist rail and the interdependent node tectonic level sectional detail drawing of patent of the present invention.
The label implication of each in figure：The overhanging support of 1- concrete drilling bored concrete piles, 2- Guan Liangs, 3- agent structures, 4- bases
Sand bed, 6- outer wall of basement, 7- basements floor, 8- Base isolation systems, 9- blinding layers, 10- in the overhanging support of raft plate, 5- rubbles
Backfill the soil body, 11- waist rails, 12- outer wall of basement waterproof layer, 13- outer wall of basement heat-insulation layer, 14- built-in fittings.
Embodiment
The present invention is described in further details below in conjunction with the drawings and specific embodiments.
Embodiment 1：
Shown in Fig. 1, excavation of foundation pit and Underground Construction stage, pattern foundation pit supporting structure uses pile-anchor supporting system.
Shown in Fig. 2, first of permanent overhanging support is the overhanging support 4 of Base isolation system, in the plane of Base isolation system 8,
It is plain concrete support.
Support system includes concrete drilling bored concrete pile 1, Guan Liang 2, the overhanging support 3 of agent structure, the overhanging branch of Base isolation system
Sand bed 5 in support 4, rubble, outer wall of basement 6, basement floor 7, Base isolation system 8, blinding layer 9 backfills the soil body 10, waist rail
11, outer wall of basement waterproof layer 12, outer wall of basement heat-insulation layer 13, built-in fitting 14.
Shown in Fig. 2, other supports beyond first of overhanging support are body junctions in the floor level of corresponding height
The overhanging support of structure, belongs to reinforced concrete support, is connected by reserved steel bar and the floor member of the agent structure of corresponding height,
Support outside acts on waist rail 11, and waist rail 11 is connected by steel plate built-in fitting 14 with support pile.
Basement floor comprises the following steps with the cooperative permanent support system construction technology of support pile：
(1) construction of concrete drilling bored concrete pile, including the welding of steel reinforcement cage, rig pore-forming, hang steel reinforcement cage, bored concrete pile
Body concrete, stake top Guan Liang 2 are constructed；
(2) excavation of foundation pit and prestressed anchor construction；
(3) bottom of foundation ditch bed course 9 and Base isolation system 8 are performed；
(4) the overhanging support 4 of Base isolation system is constructed, and sets Base isolation system overhanging between Base isolation system 8 and foundation pit supporting pile
Support 4, the support supports for permanent plain concrete, and Specific construction technique is：Blinding layer 9 and the construction of Base isolation system 8 terminate
Afterwards, fertile groove of being constructed between raft edges of boards edge and foundation pit supporting pile is cleared up, first in plain concrete thick empty fertile trench bottom laying 200mm
Bed course, then backfill on bed course certain thickness rubble, middle sand, and the outer of Base isolation system 8 is poured in rubble on sand bed 5
Support is stretched, upper surface and the upper surface flush of Base isolation system 8 of the overhanging support, the overhanging construction of support 4 of Base isolation system are finished；
(5) bottom basement main structure construction；
(6) the overhanging support 3 of agent structure and waist rail 11 are constructed：Second master is set in the plane of bottom basement floor 7
The overhanging support 3 of body structure and waist rail 11, waist rail 11 and the support are reinforced concrete support, and its work progress follows basement closely
Bottom floor slab construction is carried out, and absolute altitude is positioned in bottom floor level, is connected by reserved steel bar with basement floor 7, waist
Beam 11 is connected by built-in fitting 14 with foundation pit supporting pile, and the overhanging support 3 of second agent structure is completed；
(7) more last layer basement agent structure and waist rail 11 and the overhanging support 3 of corresponding agent structure are carried out successively
Construction；
(8) after first floor basement floor 7 and overhanging Construction of Supporting terminate, carry out successively outer wall of basement waterproof layer 12,
The construction of lower room insulating layer of external wall 13, especially the water-proofing treatment of multiple knot；
(9) fertile groove of constructing backfills the soil body 10 and compaction in layers.
Embodiment 2
Basement floor comprises the following steps with the cooperative permanent support system construction technology of support pile：
(1) cast-in-situ bored pile 1 is performed；
(2) excavation pit and anchor pole is performed；
(3) blinding layer 9 and Base isolation system 8 are performed；
(4) permanent plain concrete is set to support between Base isolation system 8 and support pile 1, i.e. the overhanging support of Base isolation system
4, Specific construction technique is：After the construction of raft plate terminates, building waste in dead slot, paving between cleaning raft edges of boards edge and foundation pit supporting pile
If plain concrete bed course thick 200mm, backfill level matches somebody with somebody layer of sand 5 in good rubble, pours thick not less than 500mm in raft plate plane
Plain concrete horizontal support, first of overhanging Construction of Supporting is finished；
(5) first of anchor cable, which are removed, to be reclaimed：After the overhanging support 4 of Base isolation system reaches 80% design strength, remove simultaneously
Reclaim first of anchor cable；
(6) bottom basement main structure construction；
(7) the overhanging support 3 of agent structure is performed：Perform the overhanging support of second for the overhanging support 3 of agent structure, the branch
Support as reinforced concrete structure, follow the progress of basement bottom floor slab construction closely, be arranged at outer wall of basement 6 and filled with concrete drill hole
Note between stake 1, absolute altitude is positioned in floor level, by being arranged on the armored concrete waist of corresponding height between support pile 1
The power transmission of beam 11；
(8) second anchor cable is removed and reclaimed：80% design strength is reached in the overhanging support of second armored concrete
Afterwards, remove and reclaim first of anchor cable；
(9) construction of more last layer basement agent structure and overhanging structure is carried out successively, and carries out returning for respective anchors rope
Receive；
(10) after basement first floor floor and overhanging Construction of Supporting terminate, waterproof, the insulation of outer wall of basement are carried out successively
Construction, especially the water-proofing treatment of multiple knot；
(11) fertile groove of constructing backfills the soil body and compaction in layers.
The present invention is a kind of basement floor and the cooperative permanent support system of support pile, by setting up outside permanent
Support, waist rail and the backfill soil body are stretched, the flat force transfer system of composite water is set up between foundation pit supporting pile and underground space structure,
To realize that the lateral resisting structure system is permanently played effectiveness.
Claims (5)
1. basement floor and the construction method of the cooperative permanent support system of support pile, it is characterised in that including following
Step：
Step 1：Support pile is performed, excavation of foundation pit is carried out, performs the support system in excavation of foundation pit stage；
Step 2：Carry out bottom of foundation ditch bed course, construction Base isolation system and the overhanging support of Base isolation system；
Step 3：Bottom basement main structure construction is carried out, after bottom basement main structure construction, first of main body is carried out
The overhanging support of structure and the construction of corresponding waist rail；
In step 3, the waist rail is connected by built-in fitting with foundation pit supporting pile；
Step 4：The overhanging support of more last layer basement agent structure and the construction of corresponding waist rail are carried out successively until basement is first
Floor plate and overhanging Construction of Supporting terminate；
Filled with the backfill soil body between the outer wall of basement and support pile；
Step 5：The fertile groove backfill soil body of construction and compaction in layers；
In step 1, the support system in the excavation of foundation pit stage uses the pile-anchor system of concrete drilling bored concrete pile；
In step 3, after the intensity of the overhanging support of the agent structure of corresponding height reaches 80% design strength, remove back
Receive the anchor pole of corresponding height；
In step 2, after the overhanging support of the Base isolation system reaches 80% design strength, remove and reclaim first of anchor pole；
In step 3, the overhanging support of first of agent structure follows the progress of basement bottom floor slab construction closely, and absolute altitude is positioned at building
In plate plane.
2. basement floor according to claim 1 and the construction method of the cooperative permanent support system of support pile,
It is characterized in that：In the step 1, support pile is using the stake of concrete drill hole poured support, and it, which performs process, includes steel reinforcement cage
Welding, rig pore-forming, hang steel reinforcement cage, perfusion pile concrete, stake top Guan Liang construction, carry out anchor bolt construction.
3. basement floor according to claim 1 and the construction method of the cooperative permanent support system of support pile,
It is characterized in that：In step 2, after the Base isolation system construction terminates, between cleaning raft edges of boards edge and foundation pit supporting pile in dead slot
Building waste, lay plain concrete cushion layer；Level is backfilled in the plain concrete cushion layer and matches somebody with somebody good rubble, middle sand.
4. basement floor according to claim 1 and the construction method of the cooperative permanent support system of support pile,
It is characterized in that：In step 2, the thickness of the overhanging support of Base isolation system is not less than 500mm.
5. basement floor according to claim 1 and the construction method of the cooperative permanent support system of support pile,
It is characterized in that：In step 4, after basement first floor floor and overhanging Construction of Supporting terminate, the anti-of outer wall of basement is carried out successively
Water, heat preservation construction, the fertile groove backfill soil body of construction and compaction in layers.
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| CN201510162771.5A CN104895089B (en) | 2015-04-08 | 2015-04-08 | Basement floor and the construction method of the cooperative permanent support system of support pile |
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| CN201510162771.5A CN104895089B (en) | 2015-04-08 | 2015-04-08 | Basement floor and the construction method of the cooperative permanent support system of support pile |
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| CN104895089B true CN104895089B (en) | 2017-08-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105735352A (en) * | 2016-04-20 | 2016-07-06 | 山东大学 | Fabricated structure based on foundation pit retaining pile for basement exterior walls, and construction method |
| CN105951848B (en) * | 2016-07-01 | 2018-06-19 | 浙江新曙光建设有限公司 | Ultra-deep foundation pit supports Non-intermittent combined type transformational structure and construction method |
| CN108385693B (en) * | 2018-02-27 | 2023-10-03 | 中科院广州化灌工程有限公司 | Equal-generation anchor bolt supporting method and system for staged basement supporting |
| CN109322312A (en) * | 2018-12-08 | 2019-02-12 | 上海宝冶集团有限公司 | A kind of ultra-deep foundation pit sole plate combines anti-floating construction and its construction method with support pile |
| CN109403349A (en) * | 2018-12-10 | 2019-03-01 | 中建局集团建设发展有限公司 | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method |
| CN111705847A (en) * | 2020-06-15 | 2020-09-25 | 山东大学 | Permanent support structure and method combining anti-floating anchor rod with underground horizontal structure |
| CN112012218B (en) * | 2020-07-17 | 2021-05-25 | 广州市设计院 | Main supporting and connecting method at waist beam |
| CN111827303B (en) * | 2020-07-27 | 2021-06-01 | 山东建勘集团有限公司 | Backfill-free foundation pit permanent support system and construction method thereof |
| CN112502180A (en) * | 2020-12-09 | 2021-03-16 | 苏州第五建筑集团有限公司 | Construction method of deep foundation pit basement bottom raft |
| CN114482081B (en) * | 2022-01-28 | 2024-01-23 | 中国建筑第八工程局有限公司 | Deep foundation pit fertilizer groove backfill system |
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| CN101476331B (en) * | 2007-12-12 | 2012-07-04 | 中国二十冶集团有限公司 | Closed demolition blasting method for internal concrete reinforcement bracing of basement foundation ditch |
| JP5681039B2 (en) * | 2011-05-02 | 2015-03-04 | 戸田建設株式会社 | Mountain fastening method |
| CN103306301A (en) * | 2013-07-04 | 2013-09-18 | 天津市天友建筑设计股份有限公司 | Pile foundation structure and construction method thereof based on fender post and basement baseplate |
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