CN104895089A - Construction method of permanent retaining system characterized by joint work of basement floor slabs and retaining piles - Google Patents
Construction method of permanent retaining system characterized by joint work of basement floor slabs and retaining piles Download PDFInfo
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- CN104895089A CN104895089A CN201510162771.5A CN201510162771A CN104895089A CN 104895089 A CN104895089 A CN 104895089A CN 201510162771 A CN201510162771 A CN 201510162771A CN 104895089 A CN104895089 A CN 104895089A
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Abstract
The invention provides a construction method of a permanent retaining system characterized by joint work of basement floor slabs and retaining piles. The system comprises foundation pit retaining piles and members depending on a basement floor slab structure, such as horizontal outward-extending supports and middle beams. The retaining piles are anchored by using pre-stressed anchor cables in the foundation pit excavation stage. In the basement construction stage, the permanent outward-extending supports are arranged to replace anchor rods to bear the horizontal working force of the retaining piles. The retaining structure system and the body structure can function together permanently. The invention provides a novel underground space retaining system; a temporary foundation pit retaining structure can be changed into a permanent underground retaining structure; the properties of materials can be fully utilized; the construction costs can be reduced; and underground environments can be protected.
Description
Technical field
The invention belongs to industry and civilian construction foundation field, the particularly construction method of basement floor and the cooperative permanent support system of soldier pile.
Background technology
At deep foundation pit of construction engineering field, based on the piled anchor foundation pit supporting construction of bored pile as one of main provisional pattern foundation pit supporting structure form, significant wastage is caused to constructional materials and social resources.In traditional design thinking, it is working measure that base pit engineering belongs to provisional, and Design of Main Structure is often ahead of the design of foundation pit supporting construction, to cause in design process both disconnections.Permanent foundation pit supporting system based on bored pile is by permanent overhanging support, agent structure under ground portion is combined with concrete support stake, forms horizontal Path of Force Transfer and the Lateral Resistant System of main body under ground portion horizontal structure and support system shared rock and soil pressure.New technology will effectively reduce construction costs, economize on resources, protection of the environment, promote the sustainable development of urban construction.
Summary of the invention
For solving the problem, the invention provides one: changing existing provisional foundation pit supporting construction system is permanent foundation pit supporting construction system, give full play to the basement floor of the permanent effect of support system and the construction method of the cooperative permanent support system of soldier pile.
To achieve these goals, the present invention adopts following technical scheme:
Between outer wall of basement and soldier pile, arrange overhanging support, described overhanging support comprises the overhanging support of Base isolation system and the overhanging support of agent structure, and the overhanging support of described Base isolation system is positioned at Base isolation system plane, and two ends are connected with Base isolation system and soldier pile respectively; The overhanging support of described agent structure is positioned at the beam slab plane of each layer corresponding height, and its one end is connected with the beams and slabs of agent structure, and the other end is connected with soldier pile by waist rail; Described soldier pile is in the part being connected to become the permanent support system in underground of the overhanging support of agent structure and waist rail.
Described soldier pile adopts concrete drilling bored concrete pile, underground space structure at least one deck of described agent structure.
Each layer beam slab of described waist rail and agent structure is positioned at same plane, and described waist rail is connected with soldier pile by built-in fitting, and described waist rail is reinforced concrete structure.
The overhanging support of described Base isolation system is that plain concrete supports.
The upper surface of the overhanging support of described Base isolation system flushes with raft plate surface.
The bottom process of the overhanging support of described Base isolation system comprises the thick plain concrete cushion layer of bottom 200mm, and rubble, medium sand that bed course top backfill grating is good.
Described agent structure is overhanging is supported for reinforced concrete support.
The overhanging support of described agent structure is connected by the beams and slabs of reserved steel bar with the agent structure of corresponding height.
The backfill soil body is filled with between described outer wall of basement and soldier pile.
Described outer wall of basement is provided with insulation water-proof layer.
The construction method of basement floor and the cooperative permanent support system of soldier pile, comprises the following steps:
Step 1: perform soldier pile, carries out excavation of foundation pit, performs the support system in excavation of foundation pit stage;
Step 2: carry out foundation ditch bottom cushion, construction Base isolation system and the overhanging support of Base isolation system;
Step 3: carry out the main structure construction of bottom basement, after the main structure construction of bottom basement, carries out the construction of the overhanging support of first agent structure and corresponding waist rail;
Step 4: carry out the construction of the more overhanging support of last layer basement agent structure and corresponding waist rail successively until basement first floor floor and overhanging Construction of Supporting terminate;
Step 5: fertile groove of constructing backfills the soil body and compaction in layers.
Wherein, in step 1, the support system in described excavation of foundation pit stage adopts the pile-anchor system of concrete drilling bored concrete pile.
In step 1, soldier pile adopts the stake of concrete drill hole poured support, and its work progress comprises the welding of reinforcing cage, rig pore-forming, install reinforcing cage, perfusion pile concrete, the construction of stake apical cap beam, carries out anchor bolt construction.
In step 2, after the overhanging support of described Base isolation system reaches the design strength of 80%, remove and reclaim first anchor pole.
In step 2, after described Base isolation system construction terminates, the building waste between cleaning raft panel edges and foundation pit supporting pile in dead slot, lays plain concrete cushion layer; Described plain concrete cushion layer backfills the good rubble of grating, medium sand.
In step 2, the thickness of the overhanging support of described Base isolation system is not less than 500mm.
In step 3, the overhanging support of described first agent structure follows basement bottom floor slab construction closely and carries out, and absolute altitude is positioned in floor level.
In step 3, after the intensity of the overhanging support of described agent structure of corresponding height reaches the design strength of 80%, remove the anchor pole reclaiming corresponding height.
In step 3, waist rail is connected with foundation pit supporting pile by built-in fitting
In step 4, after basement first floor floor and overhanging Construction of Supporting terminate, carry out the waterproof of outer wall of basement, heat preservation construction successively, fertile groove of constructing backfills the soil body and compaction in layers.
Beneficial effect of the present invention is:
In the present invention, the Main Function of overhanging support is contact agent structure and supporting and protection structure, transmits horizontal force; Waist rail has two effects, and connected by retaining piles as a whole by waist rail on the one hand, on the other hand, the concentrated force that overhanging support is transmitted can be evenly distributed to each campshed by waist rail, avoids stress to concentrate and causes structural deterioration.By the acting in conjunction of permanent overhanging support and waist rail, soldier pile and underground space main body floor are combined, form space lateral resisting structure system, and enrich force path by backfill power transmission.
The present invention makes every effort to agent structure System Design and dominates foundation pit supporting system design, changes the present situation that base pit engineering and structure design in the past depart from.
The present invention achieves the permanence effect of foundation pit supporting construction on the basis of original provisional pattern foundation pit supporting structure theory, is the tremendous increase to traditional pattern foundation pit supporting structure theory.
The present invention changes the present situation that foundation pit supporting system in the past goes out of use after the main structure construction of underground; achieve foundation pit supporting construction by provisional to permanent transformation; save construction cost; in conjunction with the recycling of anchor cable; protection of the environment, promotes the sustainable development that urban underground space is built.
Use permanent foundation pit supporting construction form, effectively can improve the loading characteristic of supporting and protection structure and Main Underground body structure, utilize the reasonable mechanical of overhanging support, common anchor cable can be replaced with Recyclable anchor rope, while guarantee structural safety, cost-saving, economize on resources, more meet the theory of green building.
This invention can be played a great role in the Pile-Anchor Supporting for Deep Excavation structural system widely applied, can change existing provisional foundation pit supporting construction system is permanent foundation pit supporting construction system, give full play to the permanent effect of support system, the horizontal stress that effective reduction agent structure outer wall of basement is born, save construction cost, reduce construction costs.
Accompanying drawing explanation
Fig. 1 is the integral structural system figure of patent of the present invention.
Fig. 2 is the overhanging support of patent of the present invention, waist rail and interdependent node structure vertical cross section detail drawing.
Fig. 3 is the overhanging support of patent of the present invention, waist rail and interdependent node tectonic level sectional detail drawing.
Each label implication in figure: in 1-concrete drilling bored concrete pile, the overhanging support of 2-Guan Liang, 3-agent structure, the overhanging support of 4-Base isolation system, 5-rubble, sand bed, 6-outer wall of basement, 7-basement floor, 8-Base isolation system, 9-foundation pad, 10-backfill the soil body, 11-waist rail, 12-outer wall of basement waterproofing course, 13-outer wall of basement insulation layer, 14-built-in fitting.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Embodiment 1:
Shown in Fig. 1, excavation of foundation pit and Underground Construction stage, pattern foundation pit supporting structure adopts pile-anchor supporting system.
Shown in Fig. 2, the permanent overhanging support of first is the overhanging support 4 of Base isolation system, is positioned at Base isolation system 8 plane, is that plain concrete supports.
Support system comprises concrete drilling bored concrete pile 1, hat beam 2, the overhanging support 3 of agent structure, the overhanging support 4 of Base isolation system, sand bed 5 in rubble, outer wall of basement 6, basement floor 7, Base isolation system 8, foundation pad 9, the backfill soil body 10, waist rail 11, outer wall of basement waterproofing course 12, outer wall of basement insulation layer 13, built-in fitting 14.
Shown in Fig. 2, other beyond the overhanging support of first support the floor level being positioned at corresponding height, it is the overhanging support of agent structure, belong to reinforced concrete support, be connected by the floor member of reserved steel bar with the agent structure of corresponding height, support outside and act on waist rail 11, waist rail 11 is connected with soldier pile by steel plate built-in fitting 14.
Basement floor and soldier pile cooperative permanent support system construction technology comprise the following steps:
(1) construction of concrete drilling bored concrete pile, comprises the welding of reinforcing cage, rig pore-forming, install reinforcing cage, perfusion pile concrete, stake apical cap beam 2 constructs;
(2) excavation of foundation pit and prestressed anchor construction;
(3) foundation ditch bottom cushion 9 and Base isolation system 8 is performed;
(4) the overhanging support 4 of Base isolation system is constructed, the overhanging support 4 of Base isolation system is set between Base isolation system 8 and foundation pit supporting pile, this is supported for permanent plain concrete and supports, Specific construction technique is: after foundation pad 9 and Base isolation system 8 construction terminate, fertile groove of constructing between raft panel edges and foundation pit supporting pile is cleared up, first lay the thick plain concrete bed course of 200mm at the fertile trench bottom of sky, certain thickness rubble is backfilled again on bed course, medium sand, and in rubble, on sand bed 5, build the overhanging support of Base isolation system 8, the upper surface of described overhanging support and Base isolation system 8 upper surface flush, the overhanging support of Base isolation system 4 is constructed complete,
(5) bottom basement main structure construction;
(6) the overhanging support of agent structure 3 and waist rail 11 are constructed: in bottom basement floor 7 plane, arrange the overhanging support 3 of second agent structure and waist rail 11, waist rail 11 and this support are reinforced concrete support, its work progress follows basement bottom floor slab construction closely to carry out, absolute altitude is positioned in ground floor board plane, be connected with basement floor 7 by reserved steel bar, waist rail 11 is connected with foundation pit supporting pile by built-in fitting 14, and the overhanging support 3 of second agent structure completes;
(7) construction of more last layer basement agent structure and waist rail 11 and the overhanging support 3 of corresponding agent structure is carried out successively;
(8), after first floor basement floor 7 and overhanging Construction of Supporting terminate, carry out the construction of outer wall of basement waterproofing course 12, outer wall of basement insulation layer 13 successively, especially the waterproofing work of multiple knot;
(9) the also compaction in layers of fertile groove of the constructing backfill soil body 10.
Embodiment 2
Basement floor and soldier pile cooperative permanent support system construction technology comprise the following steps:
(1) bored pile 1 is performed;
(2) excavation pit and perform anchor pole;
(3) foundation pad 9 and Base isolation system 8 is performed;
(4) between Base isolation system 8 and soldier pile 1, arrange permanent plain concrete to support, the i.e. overhanging support 4 of Base isolation system, Specific construction technique is: after the construction of raft plate terminates, building waste in dead slot between cleaning raft panel edges and foundation pit supporting pile, lay the plain concrete bed course that 200mm is thick, layer of sand 5 in the rubble that backfill grating is good, build in raft board plane and be not less than the thick plain concrete horizontal support of 500mm, the overhanging Construction of Supporting of first is complete;
(5) first anchor cable is removed and is reclaimed: after the overhanging support 4 of Base isolation system reaches the design strength of 80%, remove and reclaim first anchor cable;
(6) bottom basement main structure construction;
(7) the overhanging support of agent structure 3 is performed: perform the overhanging support of second into the overhanging support of agent structure 3, this is supported for reinforced concrete structure, follow basement bottom floor slab construction closely to carry out, be arranged between outer wall of basement 6 and concrete drilling bored concrete pile 1, absolute altitude is positioned in floor level, and by being arranged on reinforced concrete waist rail 11 power transmission of corresponding height between soldier pile 1;
(8) second anchor cable is removed and is reclaimed: after the overhanging support of second steel concrete reaches the design strength of 80%, removes and reclaims first anchor cable;
(9) carry out the construction of more last layer basement agent structure and overhanging structure successively, and carry out the recovery of respective anchors rope;
(10), after basement first floor floor and overhanging Construction of Supporting terminate, carry out the waterproof of outer wall of basement, heat preservation construction successively, especially the waterproofing work 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 soldier pile, by setting up permanent overhanging support, waist rail and the backfill soil body, between foundation pit supporting pile and underground space structure, set up the flat force transfer system of composite water, play effectiveness to realize this lateral resisting structure system is permanent.
Claims (10)
1. the construction method of basement floor and the cooperative permanent support system of soldier pile, is characterized in that, comprise the following steps:
Step 1: perform soldier pile, carries out excavation of foundation pit, performs the support system in excavation of foundation pit stage;
Step 2: carry out foundation ditch bottom cushion, construction Base isolation system and the overhanging support of Base isolation system;
Step 3: carry out the main structure construction of bottom basement, after the main structure construction of bottom basement, carries out the construction of the overhanging support of first agent structure and corresponding waist rail;
Step 4: carry out the construction of the more overhanging support of last layer basement agent structure and corresponding waist rail successively until basement first floor floor and overhanging Construction of Supporting terminate;
Step 5: fertile groove of constructing backfills the soil body and compaction in layers.
2. the construction method of basement floor according to claim 1 and the cooperative permanent support system of soldier pile, is characterized in that: in step 1, and the support system in described excavation of foundation pit stage adopts the pile-anchor system of concrete drilling bored concrete pile.
3. the construction method of basement floor according to claim 2 and the cooperative permanent support system of soldier pile, it is characterized in that: in described step 1, soldier pile adopts the stake of concrete drill hole poured support, it performs process and comprises the welding of reinforcing cage, rig pore-forming, install reinforcing cage, perfusion pile concrete, the construction of stake apical cap beam, carries out anchor bolt construction.
4. the construction method of basement floor according to claim 2 and the cooperative permanent support system of soldier pile, is characterized in that: in step 2, after the overhanging support of described Base isolation system reaches the design strength of 80%, removes and reclaims first anchor pole.
5. the construction method of basement floor according to claim 1 and the cooperative permanent support system of soldier pile, it is characterized in that: in step 2, after described Base isolation system construction terminates, the building waste between cleaning raft panel edges and foundation pit supporting pile in dead slot, lays plain concrete cushion layer; Described plain concrete cushion layer backfills the good rubble of grating, medium sand.
6. the construction method of basement floor according to claim 1 and the cooperative permanent support system of soldier pile, is characterized in that: in step 2, and the thickness of the overhanging support of described Base isolation system is not less than 500mm.
7. the construction method of basement floor according to claim 1 and the cooperative permanent support system of soldier pile, it is characterized in that: in step 3, the overhanging support of described first agent structure follows basement bottom floor slab construction closely and carries out, and absolute altitude is positioned in floor level.
8. the construction method of basement floor according to claim 2 and the cooperative permanent support system of soldier pile, it is characterized in that: in step 3, after the intensity of the overhanging support of described agent structure of corresponding height reaches the design strength of 80%, remove the anchor pole reclaiming corresponding height.
9. the construction method of basement floor according to claim 1 and the cooperative permanent support system of soldier pile, it is characterized in that: in step 3, described waist rail is connected with foundation pit supporting pile by built-in fitting.
10. the construction method of basement floor according to claim 1 and the cooperative permanent support system of soldier pile, it is characterized in that: in step 4, after basement first floor floor and overhanging Construction of Supporting terminate, carry out waterproof, the heat preservation construction of outer wall of basement successively, fertile groove of constructing backfills the soil body and compaction in layers.
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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 |
| CN105951848A (en) * | 2016-07-01 | 2016-09-21 | 杭州江润科技有限公司 | Non-intermittent composite transfer structure for super-deep foundation pit support and construction method |
| CN108385693A (en) * | 2018-02-27 | 2018-08-10 | 中科院广州化灌工程有限公司 | A kind of waiting for anchor rod support method and support system for basement supporting by stages |
| 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 |
| CN111827303A (en) * | 2020-07-27 | 2020-10-27 | 山东建勘集团有限公司 | Backfill-free foundation pit permanent support system and construction method thereof |
| CN112012218A (en) * | 2020-07-17 | 2020-12-01 | 广州市设计院 | Main supporting and connecting method at waist beam |
| 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 |
| CN114482081A (en) * | 2022-01-28 | 2022-05-13 | 中国建筑第八工程局有限公司 | Deep foundation pit fertilizer groove backfilling system |
| CN116043910A (en) * | 2022-12-12 | 2023-05-02 | 中国建筑第四工程局有限公司 | Construction method for sharing supporting piles and connecting multiple layers of basement in staged construction |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105951848A (en) * | 2016-07-01 | 2016-09-21 | 杭州江润科技有限公司 | Non-intermittent composite transfer structure for super-deep foundation pit support and construction method |
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| 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 |
| CN108385693A (en) * | 2018-02-27 | 2018-08-10 | 中科院广州化灌工程有限公司 | A kind of waiting for anchor rod support method and support system for basement supporting by stages |
| 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 |
| CN112012218A (en) * | 2020-07-17 | 2020-12-01 | 广州市设计院 | Main supporting and connecting method at waist beam |
| CN112012218B (en) * | 2020-07-17 | 2021-05-25 | 广州市设计院 | Main supporting and connecting method at waist beam |
| CN111827303A (en) * | 2020-07-27 | 2020-10-27 | 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 |
| CN114482081A (en) * | 2022-01-28 | 2022-05-13 | 中国建筑第八工程局有限公司 | Deep foundation pit fertilizer groove backfilling system |
| 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 |
| CN116043910A (en) * | 2022-12-12 | 2023-05-02 | 中国建筑第四工程局有限公司 | Construction method for sharing supporting piles and connecting multiple layers of basement in staged construction |
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