CN105040706A - Double-row pile support structure capable of fully utilizing basement space and construction method of double-row pile support structure - Google Patents
Double-row pile support structure capable of fully utilizing basement space and construction method of double-row pile support structure Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 77
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 15
- 238000005056 compaction Methods 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims description 50
- 238000005859 coupling reaction Methods 0.000 claims description 50
- 230000008878 coupling Effects 0.000 claims description 48
- 238000009412 basement excavation Methods 0.000 claims description 20
- 230000002787 reinforcement Effects 0.000 claims description 12
- 230000011218 segmentation Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 238000006467 substitution reaction Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 238000002271 resection Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000009435 building construction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
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Abstract
The invention relates to a double-row pile support structure capable of fully utilizing basement space and a construction method of the double-row pile support structure, and belongs to the field of building construction and room buildings. A crown beam I is arranged on the top of a front row pile, and a crown beam II is arranged on the top of a rear row pile. The top of the front row pile and the top of the rear row pile are connected through a connecting beam I. A waterproof curtain pile is arranged in a pile rear soil body of the rear row pile. After a field is leveled, all project piles are constructed according to the design. A connecting beam II is poured on the top of the cut front row pile. The connecting beam II and a negative layer basement bottom plate are integrally poured. The part between the front row pile and a minus-two floor basement outer wall is filled with layering compaction filling soil. The part between the front row pile and a minus-two floor basement bottom plate is filled with plain concrete. According to the double-row pile support structure, double-row piles are changed into a single-row-pile structure with the same rigidity by means of the equal-rigidity replacement principle of the double row piles and the single row piles, the horizontal displacement of a support structure system can be controlled, and meanwhile the foundation pit support cost can be greatly reduced; and good economical efficiency is achieved in a foundation pit project with basements with multiple layers.
Description
Technical field
The present invention relates to a kind of Retaining Structure with Double-row Piles and the construction method thereof that can make full use of basement space, belong to building operations and field of house buildings.
Background technology
Along with the quickening of urbanization process paces, the building height of inner city is more and more higher, and the basement of building is towards darker, great development, and geological conditions worse and worse, and base pit engineering surrounding enviroment become increasingly complex.The available land resources of base pit engineering of inner city is fewer and feweri, but how to utilize to greatest extent in existing land resources be the targets that developers jointly ask most.At present, the supporting scheme that China often adopts has: put slope excavation, soil-nail wall support, pile-anchor retaining, cement-soil gravity type retaining wall, campshed add the support pattern such as inner supporting structure, double-row pile.Put slope excavation, soil-nail wall support, the support space of pile-anchor retaining required for inner city are excessive, often cannot adopt.For the base pit engineering containing multi-storey basement, adopt cantilevered Single row pillars supporting and protection structure can not meet the requirement of foundation pit deformation; Cantilevered Retaining Structure with Double-row Piles rigidity is large but the adaptation degree of depth is limited; Common campshed adds that inner support supporting and protection structure cost is high, long construction period and basement space utilization rate is inadequate.Therefore, traditional supporting and protection structure is used to have certain limitation.
Summary of the invention
In order to better solve the problem, enable basement space be fully utilized simultaneously, the invention provides a kind of Retaining Structure with Double-row Piles and the construction method thereof that can make full use of basement space.
Technical scheme of the present invention is: a kind of Retaining Structure with Double-row Piles that can make full use of basement space, bankets 10, negative one deck basement bottom board 12, negative two layers of basement bottom board 13, coupling beam II 14 form by front campshed 1, rear campshed 2, hat beam I 3, hat beam II 4, coupling beam I 5, water-stop curtain stake 6, basement 7, engineering pile 8, plain concrete 9, compaction in layers; Wherein front campshed 1 top is provided with hat beam I 3, the stake top of rear campshed 2 is provided with hat beam II 4, front campshed 1 is connected by coupling beam I 5 with rear campshed 2 top, water-stop curtain stake 6 is provided with in the soil body after rear campshed 2, by all engineering piles 8 of design and construction after the leveling of place, one coupling beam II 14 is built in 1 top casting of front campshed after a resection, coupling beam II 14 and negative one deck basement bottom board 12 monobloc cast, charge stratifying compacted fill 10 between front campshed 1 and negative two layers of outer wall of basement, filling plain concrete 9 between front campshed 1 and negative two layers of basement bottom board 13.
Rectangular or " fourth " font array arrangement of the pile body layout of described front campshed 1 and rear campshed 2 and be spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, described construction sequence is as follows:
Step1, requirement according to Geological condition and deep pit monitor Stability Numerical Analysis, determine that the stake of campshed is long, stake footpath and pile spacing, determines the spacing, sectional dimension and the arrangement form that support; The cross-sectional strength of campshed and support system and arrangement of reinforcement are designed; Determine sectional dimension and the quantity of reinforcement of Guan Liang; Determine excavation operation;
Step2, according to the pile body stiffness of Single row pillars by etc. rigidity substitution principle replace into Retaining Structure with Double-row Piles, after in double-row pile, the position of campshed is determined according to the scope of excavation of foundation pit and the position of building line, and before and after ensureing, the array pitch of campshed is the campshed diameter (the total materials of pile shaft material obtain and significantly reduce) of 3 ~ 5 times;
Step3, according to construction requirement, after levelling of the land, setting absolute altitude to be constructed all engineering piles 8;
Step4, construction water-stop curtain stake 6, pile-type is by design and sealing requirement is determined;
Campshed 2 after Step5, construction, pile-type is determined by design;
Campshed 1 before Step6, construction, pile-type is determined by design;
Step7, construction hat beam I 3, hat beam II 4, coupling beam I 5, coupling beam II 14, make whole support system form an entirety, each several part cooperative bearing is out of shape;
Step8, to excavate by operating mode layer and section and to design each layer support system, until at the bottom of excavation to Foundation Pit;
Step9, build basement bottom board, and the basement structure remove each road support system, until before building negative one deck basement bottom board 12 of up constructing;
First inner support, front campshed 1, hat beam I 3 and coupling beam I 5 are removed in Step10, segmentation, and campshed inter-pile soil body before and after removing; The segmentation of negative one deck basement bottom board 12 built to being the position of 1m apart from rear campshed 2 and building outer wall of basement to ground, wherein basement structure can adopt front campshed Cantilever Beams 15 also can be adopted as vertical force transfer system as force transfer system; By said process section construction until whole basement construction completes.
When before basement structure adopts, campshed is as force transfer system, together with the basement of extension must be provided with original basement connecting portion, settlement joint 11 (avoids differential settlement to cause the basement structure of epitaxial part to destroy, front campshed not only will meet the requirement as anti-bending bearing capacity during supporting and protection structure, and will meet the requirement as Compressive Bearing Capacity during force transfer system and Vertical Settlement distortion).The length of described front campshed 1 can be designed to be more than or equal to rear campshed 2 length.
When basement structure adopts Cantilever Beams 15 as vertical force transfer system, the sectional dimension of Cantilever Beams 15 and spacing should calculate according to the load of extension basement structure to be determined.
If determine, employing diameter is the single supporting pile structure of d, Single row pillars structure being replaced into Double-row-piles Structure by waiting Rigidity Theory, suppose the equal diameters of the front and back campshed of Retaining Structure with Double-row Piles, and the soldier pile diameter after replacement being D, the array pitch of getting soldier pile is 4D, presses and waits Rigidity Theory then: EI
single=EI
two(wherein, soldier pile is reinforced concrete pile, and Single row pillars is equal with the elastic modulus E of double-row pile), obtains π d
4/ 64=2 ∫ y
2dA (wherein y=2D, A=π D
2/ 4), solve
then Retaining Structure with Double-row Piles front and back campshed section area and be:
get the long stake appearance etc. with Single row pillars supporting and protection structure of the stake of double-row pile, then under equal rigidity condition, double-row pile concrete amount is only 1/4 of Single row pillars, and its economy is considerable.
The invention has the beneficial effects as follows:
1, for deep big foundation pit engineering, particularly containing base pit engineering more than two-layer basement, current Single row pillars becomes main flow in conjunction with inner support support form, but the rigidity of Single row pillars is less, along with the increase of foundation depth, the horizontal movement of supporting and protection structure be controlled, the sectional dimension etc. of the diameter that so will certainly increase soldier pile, the level reducing support and vertical spacing, increase braced structures, significantly add engineering material, cause unnecessary waste.From this angle, by double-row pile and Single row pillars etc. rigidity substitution principle, the rigidity such as double-row pile are replaced into Single row pillars structure, not only can control the horizontal movement of supporting structure system, can also significantly reduce pattern foundation pit supporting structure expense simultaneously.
2, Retaining Structure with Double-row Piles is compared with Single row pillars supporting and protection structure, improves the stress performance of supporting and protection structure, decreases pile shaft material consumption, effectively controls the displacement of soldier pile pile body; Compared with traditional double campshed, increase the utilized space of negative one deck basement, limited land resources is fully utilized, improves economic benefit, in the base pit engineering with multi-storey basement, have good economy.
3, using the vertical force transfer system of front campshed as proposed building basement, the purposes of front campshed can be added as required.
Accompanying drawing explanation
Fig. 1 is that basement structure of the present invention adopts front campshed as sectional drawing during force transfer system;
Fig. 2 is that basement structure of the present invention adopts Cantilever Beams as sectional drawing during force transfer system;
Each label in figure: campshed before 1-; Campshed after 2-; 3-is preced with beam I; 4-is preced with beam II; 5-coupling beam I; The stake of 6-water-stop curtain; 7-basement; 8-engineering pile; 9-plain concrete; 10-compaction in layers is banketed; 11-settlement joint; 12-bears one deck basement bottom board; 13-bears two layers of basement bottom board; 14-coupling beam II; 15-Cantilever Beams.
Detailed description of the invention
Embodiment 1: as shown in Figure 1, a Retaining Structure with Double-row Piles for basement space can be made full use of, banket 10 by front campshed 1, rear campshed 2, hat beam I 3, hat beam II 4, coupling beam I 5, water-stop curtain stake 6, basement 7, engineering pile 8, plain concrete 9, compaction in layers, negative one deck basement bottom board 12, negative two layers of basement bottom board 13, coupling beam II 14 form; Wherein front campshed 1 top is provided with hat beam I 3, the stake top of rear campshed 2 is provided with hat beam II 4, front campshed 1 is connected by coupling beam I 5 with rear campshed 2 top, water-stop curtain stake 6 is provided with in the soil body after rear campshed 2, by all engineering piles 8 of design and construction after the leveling of place, one coupling beam II 14 is built in 1 top casting of front campshed after a resection, coupling beam II 14 and negative one deck basement bottom board 12 monobloc cast, charge stratifying compacted fill 10 between front campshed 1 and negative two layers of outer wall of basement, filling plain concrete 9 between front campshed 1 and negative two layers of basement bottom board 13.
The rectangular array arrangement of pile body layout of described front campshed 1 and rear campshed 2 and be spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, described construction sequence is as follows:
Step1, requirement according to Geological condition and deep pit monitor Stability Numerical Analysis, determine that the stake of campshed is long, stake footpath and pile spacing, determines the spacing, sectional dimension and the arrangement form that support; The cross-sectional strength of campshed and support system and arrangement of reinforcement are designed; Determine sectional dimension and the quantity of reinforcement of Guan Liang; Determine excavation operation;
Step2, according to the pile body stiffness of Single row pillars by etc. rigidity substitution principle replace into Retaining Structure with Double-row Piles, after in double-row pile, the position of campshed is determined according to the scope of excavation of foundation pit and the position of building line, and before and after ensureing, the array pitch of campshed is the campshed diameter of 3 times;
Step3, according to construction requirement, after levelling of the land, setting absolute altitude to be constructed all engineering piles 8;
Step4, construction water-stop curtain stake 6, pile-type is by design and sealing requirement is determined;
Campshed 2 after Step5, construction, pile-type is determined by design;
Campshed 1 before Step6, construction, pile-type is determined by design;
Step7, construction hat beam I 3, hat beam II 4, coupling beam I 5, coupling beam II 14, make whole support system form an entirety, each several part cooperative bearing is out of shape;
Step8, to excavate by operating mode layer and section and to design each layer support system, until at the bottom of excavation to Foundation Pit;
Step9, build basement bottom board, and the basement structure remove each road support system, until before building negative one deck basement bottom board 12 of up constructing;
First inner support, front campshed 1, hat beam I 3 and coupling beam I 5 are removed in Step10, segmentation, and campshed inter-pile soil body before and after removing; The segmentation of negative one deck basement bottom board 12 built to being the position of 1m apart from rear campshed 2 and building outer wall of basement to ground, wherein basement structure adopts front campshed as force transfer system; By said process section construction until whole basement construction completes.
When before basement structure adopts, campshed is as force transfer system, settlement joint 11 together with the basement of extension must be provided with original basement connecting portion.
The length of described front campshed 1 can be designed to equal rear campshed 2 length.
Embodiment 2: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the length of described front campshed 1 can be designed to be greater than rear campshed 2 length.
Embodiment 3: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a Retaining Structure with Double-row Piles for basement space, the pile body layout of described front campshed 1 and rear campshed 2 is " fourth " font array arrangement and is spaced arrangement.
Embodiment 4: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a Retaining Structure with Double-row Piles for basement space, the pile body layout of described front campshed 1 and rear campshed 2 is " fourth " font array arrangement and is spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the length of described front campshed 1 can be designed to be greater than rear campshed 2 length.
Embodiment 5: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the array pitch of described front and back campshed is the campshed diameter of 5 times.
Embodiment 6: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the array pitch of described front and back campshed is the campshed diameter of 5 times.The length of described front campshed 1 can be designed to be greater than rear campshed 2 length.
Embodiment 7: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a Retaining Structure with Double-row Piles for basement space, the pile body layout of described front campshed 1 and rear campshed 2 is " fourth " font array arrangement and is spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the array pitch of described front and back campshed is the campshed diameter of 5 times.The length of described front campshed 1 can be designed to be greater than rear campshed 2 length.
Embodiment 8: as shown in Figure 1, substantially the same manner as Example 1, its difference:
Can make full use of a Retaining Structure with Double-row Piles for basement space, the pile body layout of described front campshed 1 and rear campshed 2 is " fourth " font array arrangement and is spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the array pitch of described front and back campshed is the campshed diameter of 5 times.
Embodiment 9: as shown in Figure 2, a Retaining Structure with Double-row Piles for basement space can be made full use of, banket 10 by front campshed 1, rear campshed 2, hat beam I 3, hat beam II 4, coupling beam I 5, water-stop curtain stake 6, basement 7, engineering pile 8, plain concrete 9, compaction in layers, negative one deck basement bottom board 12, negative two layers of basement bottom board 13, coupling beam II 14 form; Wherein front campshed 1 top is provided with hat beam I 3, the stake top of rear campshed 2 is provided with hat beam II 4, front campshed 1 is connected by coupling beam I 5 with rear campshed 2 top, water-stop curtain stake 6 is provided with in the soil body after rear campshed 2, by all engineering piles 8 of design and construction after the leveling of place, one coupling beam II 14 is built in 1 top casting of front campshed after a resection, coupling beam II 14 and negative one deck basement bottom board 12 monobloc cast, charge stratifying compacted fill 10 between front campshed 1 and negative two layers of outer wall of basement, filling plain concrete 9 between front campshed 1 and negative two layers of basement bottom board 13.
The rectangular array arrangement of pile body layout of described front campshed 1 and rear campshed 2 and be spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, described construction sequence is as follows:
Step1, requirement according to Geological condition and deep pit monitor Stability Numerical Analysis, determine that the stake of campshed is long, stake footpath and pile spacing, determines the spacing, sectional dimension and the arrangement form that support; The cross-sectional strength of campshed and support system and arrangement of reinforcement are designed; Determine sectional dimension and the quantity of reinforcement of Guan Liang; Determine excavation operation;
Step2, according to the pile body stiffness of Single row pillars by etc. rigidity substitution principle replace into Retaining Structure with Double-row Piles, after in double-row pile, the position of campshed is determined according to the scope of excavation of foundation pit and the position of building line, and before and after ensureing, the array pitch of campshed is the campshed diameter of 3 times;
Step3, according to construction requirement, after levelling of the land, setting absolute altitude to be constructed all engineering piles 8;
Step4, construction water-stop curtain stake 6, pile-type is by design and sealing requirement is determined;
Campshed 2 after Step5, construction, pile-type is determined by design;
Campshed 1 before Step6, construction, pile-type is determined by design;
Step7, construction hat beam I 3, hat beam II 4, coupling beam I 5, coupling beam II 14, make whole support system form an entirety, each several part cooperative bearing is out of shape;
Step8, to excavate by operating mode layer and section and to design each layer support system, until at the bottom of excavation to Foundation Pit;
Step9, build basement bottom board, and the basement structure remove each road support system, until before building negative one deck basement bottom board 12 of up constructing;
First inner support, front campshed 1, hat beam I 3 and coupling beam I 5 are removed in Step10, segmentation, and campshed inter-pile soil body before and after removing; The segmentation of negative one deck basement bottom board 12 built to being the position of 1m apart from rear campshed 2 and building outer wall of basement to ground, wherein basement structure adopts Cantilever Beams 15 as vertical force transfer system; By said process section construction until whole basement construction completes.
When basement structure adopts Cantilever Beams 15 as vertical force transfer system, the sectional dimension of Cantilever Beams 15 and spacing should calculate according to the load of extension basement structure to be determined.
According to the size of encorbelment width and the dead load load of extension basement, certain Cantilever Beams 15 is set in negative one deck basement bottom board 12 at a certain distance to transmit the load of epitaxial part basement.
Embodiment 10: as shown in Figure 2, substantially the same manner as Example 9, its difference:
Can make full use of a Retaining Structure with Double-row Piles for basement space, the pile body layout of described front campshed 1 and rear campshed 2 is " fourth " font array arrangement and is spaced arrangement.
Embodiment 11: as shown in Figure 2, substantially the same manner as Example 9, its difference:
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the array pitch of described front and back campshed is the campshed diameter of 5 times;
Embodiment 12: as shown in Figure 2, substantially the same manner as Example 9, its difference:
Can make full use of a Retaining Structure with Double-row Piles for basement space, the pile body layout of described front campshed 1 and rear campshed 2 is " fourth " font array arrangement and is spaced arrangement.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, the array pitch of described front and back campshed is the campshed diameter of 5 times.
Embodiment 13: as shown in Figure 1-2, a Retaining Structure with Double-row Piles for basement space can be made full use of, banket 10 by front campshed 1, rear campshed 2, hat beam I 3, hat beam II 4, coupling beam I 5, water-stop curtain stake 6, basement 7, engineering pile 8, plain concrete 9, compaction in layers, negative one deck basement bottom board 12, negative two layers of basement bottom board 13, coupling beam II 14 form; Wherein front campshed 1 top is provided with hat beam I 3, the stake top of rear campshed 2 is provided with hat beam II 4, front campshed 1 is connected by coupling beam I 5 with rear campshed 2 top, water-stop curtain stake 6 is provided with in the soil body after rear campshed 2, by all engineering piles 8 of design and construction after the leveling of place, one coupling beam II 14 is built in 1 top casting of front campshed after a resection, coupling beam II 14 and negative one deck basement bottom board 12 monobloc cast, charge stratifying compacted fill 10 between front campshed 1 and negative two layers of outer wall of basement, filling plain concrete 9 between front campshed 1 and negative two layers of basement bottom board 13.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, described construction sequence is as follows:
Step1, requirement according to Geological condition and deep pit monitor Stability Numerical Analysis, determine that the stake of campshed is long, stake footpath and pile spacing, determines the spacing, sectional dimension and the arrangement form that support; The cross-sectional strength of campshed and support system and arrangement of reinforcement are designed; Determine sectional dimension and the quantity of reinforcement of Guan Liang; Determine excavation operation;
Step2, according to the pile body stiffness of Single row pillars by etc. rigidity substitution principle replace into Retaining Structure with Double-row Piles, after in double-row pile, the position of campshed is determined according to the scope of excavation of foundation pit and the position of building line, and before and after ensureing, the array pitch of campshed is the campshed diameter of 3 ~ 5 times;
Step3, according to construction requirement, after levelling of the land, setting absolute altitude to be constructed all engineering piles 8;
Step4, construction water-stop curtain stake 6, pile-type is by design and sealing requirement is determined;
Campshed 2 after Step5, construction, pile-type is determined by design;
Campshed 1 before Step6, construction, pile-type is determined by design;
Step7, construction hat beam I 3, hat beam II 4, coupling beam I 5, coupling beam II 14, make whole support system form an entirety, each several part cooperative bearing is out of shape;
Step8, to excavate by operating mode layer and section and to design each layer support system, until at the bottom of excavation to Foundation Pit;
Step9, build basement bottom board, and the basement structure remove each road support system, until before building negative one deck basement bottom board 12 of up constructing;
First inner support, front campshed 1, hat beam I 3 and coupling beam I 5 are removed in Step10, segmentation, and campshed inter-pile soil body before and after removing; The segmentation of negative one deck basement bottom board 12 built to being the position of 1m apart from rear campshed 2 and building outer wall of basement to ground, wherein basement structure adopts front campshed as force transfer system; By said process section construction until whole basement construction completes.
When before basement structure adopts, campshed is as force transfer system, settlement joint 11 together with the basement of extension must be provided with original basement connecting portion.The length of described front campshed 1 can be designed to be more than or equal to rear campshed 2 length.
Embodiment 14: as shown in Figure 1-2, a Retaining Structure with Double-row Piles for basement space can be made full use of, banket 10 by front campshed 1, rear campshed 2, hat beam I 3, hat beam II 4, coupling beam I 5, water-stop curtain stake 6, basement 7, engineering pile 8, plain concrete 9, compaction in layers, negative one deck basement bottom board 12, negative two layers of basement bottom board 13, coupling beam II 14 form; Wherein front campshed 1 top is provided with hat beam I 3, the stake top of rear campshed 2 is provided with hat beam II 4, front campshed 1 is connected by coupling beam I 5 with rear campshed 2 top, water-stop curtain stake 6 is provided with in the soil body after rear campshed 2, by all engineering piles 8 of design and construction after the leveling of place, one coupling beam II 14 is built in 1 top casting of front campshed after a resection, coupling beam II 14 and negative one deck basement bottom board 12 monobloc cast, charge stratifying compacted fill 10 between front campshed 1 and negative two layers of outer wall of basement, filling plain concrete 9 between front campshed 1 and negative two layers of basement bottom board 13.
Can make full use of a construction method for the Retaining Structure with Double-row Piles of basement space, described construction sequence is as follows:
Step1, requirement according to Geological condition and deep pit monitor Stability Numerical Analysis, determine that the stake of campshed is long, stake footpath and pile spacing, determines the spacing, sectional dimension and the arrangement form that support; The cross-sectional strength of campshed and support system and arrangement of reinforcement are designed; Determine sectional dimension and the quantity of reinforcement of Guan Liang; Determine excavation operation;
Step2, according to the pile body stiffness of Single row pillars by etc. rigidity substitution principle replace into Retaining Structure with Double-row Piles, after in double-row pile, the position of campshed is determined according to the scope of excavation of foundation pit and the position of building line, and before and after ensureing, the array pitch of campshed is the campshed diameter of 3 ~ 5 times;
Step3, according to construction requirement, after levelling of the land, setting absolute altitude to be constructed all engineering piles 8;
Step4, construction water-stop curtain stake 6, pile-type is by design and sealing requirement is determined;
Campshed 2 after Step5, construction, pile-type is determined by design;
Campshed 1 before Step6, construction, pile-type is determined by design;
Step7, construction hat beam I 3, hat beam II 4, coupling beam I 5, coupling beam II 14, make whole support system form an entirety, each several part cooperative bearing is out of shape;
Step8, to excavate by operating mode layer and section and to design each layer support system, until at the bottom of excavation to Foundation Pit;
Step9, build basement bottom board, and the basement structure remove each road support system, until before building negative one deck basement bottom board 12 of up constructing;
First inner support, front campshed 1, hat beam I 3 and coupling beam I 5 are removed in Step10, segmentation, and campshed inter-pile soil body before and after removing; The segmentation of negative one deck basement bottom board 12 built to being the position of 1m apart from rear campshed 2 and building outer wall of basement to ground, wherein basement structure adopts Cantilever Beams 15 as vertical force transfer system; By said process section construction until whole basement construction completes.
When basement structure adopts Cantilever Beams 15 as vertical force transfer system, the sectional dimension of Cantilever Beams 15 and spacing should calculate according to the load of extension basement structure to be determined.
By reference to the accompanying drawings the specific embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (6)
1. can make full use of a Retaining Structure with Double-row Piles for basement space, it is characterized in that: be banketed (10) by front campshed (1), rear campshed (2), hat beam I (3), hat beam II (4), coupling beam I (5), water-stop curtain stake (6), basement (7), engineering pile (8), plain concrete (9), compaction in layers, negative one deck basement bottom board (12), negative two layers of basement bottom board (13), coupling beam II (14) form, wherein front campshed (1) stake top is provided with hat beam I (3), the stake top of rear campshed (2) is provided with hat beam II (4), front campshed (1) is connected by coupling beam I (5) with rear campshed (2) stake top, water-stop curtain stake (6) is provided with in the soil body after rear campshed (2) stake, by all engineering piles of design and construction (8) after the leveling of place, one coupling beam II (14) is built in front campshed (1) stake top casting after a resection, coupling beam II (14) and negative one deck basement bottom board (12) monobloc cast, charge stratifying compacted fill (10) between front campshed (1) and negative two layers of outer wall of basement, filling plain concrete (9) between front campshed (1) and negative two layers of basement bottom board (13).
2. the Retaining Structure with Double-row Piles that can make full use of basement space according to claim 1, is characterized in that: rectangular or " fourth " font array arrangement of the pile body layout of described front campshed (1) and rear campshed (2) and be spaced arrangement.
3. the construction method that can make full use of the Retaining Structure with Double-row Piles of basement space according to claim 1 and 2, is characterized in that: described construction sequence is as follows:
Step1, requirement according to Geological condition and deep pit monitor Stability Numerical Analysis, determine that the stake of campshed is long, stake footpath and pile spacing, determines the spacing, sectional dimension and the arrangement form that support; The cross-sectional strength of campshed and support system and arrangement of reinforcement are designed; Determine sectional dimension and the quantity of reinforcement of Guan Liang; Determine excavation operation;
Step2, according to the pile body stiffness of Single row pillars by etc. rigidity substitution principle replace into Retaining Structure with Double-row Piles, after in double-row pile, the position of campshed is determined according to the scope of excavation of foundation pit and the position of building line, and before and after ensureing, the array pitch of campshed is the campshed diameter of 3 ~ 5 times;
Step3, according to construction requirement, after levelling of the land, setting absolute altitude to be constructed all engineering piles (8);
Step4, construction water-stop curtain stake (6), pile-type is by design and sealing requirement is determined;
Campshed (2) after Step5, construction, pile-type is determined by design;
Campshed (1) before Step6, construction, pile-type is determined by design;
Step7, construction hat beam I (3), hat beam II (4), coupling beam I (5), coupling beam II (14), make whole support system form an entirety, each several part cooperative bearing is out of shape;
Step8, to excavate by operating mode layer and section and to design each layer support system, until at the bottom of excavation to Foundation Pit;
Step9, build basement bottom board, and the basement structure remove each road support system, until it is front to build negative one deck basement bottom board (12) of up constructing;
First inner support, front campshed (1), hat beam I (3) and coupling beam I (5) are removed in Step10, segmentation, and campshed inter-pile soil body before and after removing; Build bearing one deck basement bottom board (12) segmentation to the position being 1m apart from rear campshed (2) and build outer wall of basement to ground, wherein basement structure can adopt front campshed Cantilever Beams (15) also can be adopted as vertical force transfer system as force transfer system; By said process section construction until whole basement construction completes.
4. the construction method that can make full use of the Retaining Structure with Double-row Piles of basement space according to claim 3, it is characterized in that: when before basement structure adopts, campshed is as force transfer system, settlement joint (11) together with the basement of extension must be provided with original basement connecting portion.
5. the construction method that can make full use of the Retaining Structure with Double-row Piles of basement space according to claim 3, is characterized in that: the length of described front campshed (1) can be designed to be more than or equal to rear campshed (2) length.
6. the construction method that can make full use of the Retaining Structure with Double-row Piles of basement space according to claim 3, it is characterized in that: when basement structure adopts Cantilever Beams (15) as vertical force transfer system, the sectional dimension of Cantilever Beams (15) and spacing should calculate according to the load of extension basement structure to be determined.
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| CN105735325A (en) * | 2016-04-20 | 2016-07-06 | 山东大学 | Intensified permanent support assembly type basement structure system and construction method |
| CN105804093A (en) * | 2016-05-05 | 2016-07-27 | 宁波建工工程集团有限公司 | Prefabricated double-row pile and water-stop curtain integrated foundation pit supporting structure and construction method thereof |
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| CN108824483A (en) * | 2018-07-23 | 2018-11-16 | 中国建筑第八工程局有限公司 | The external wall structure and its construction method of multi-storey basement |
| CN109914394A (en) * | 2019-03-30 | 2019-06-21 | 西安科技大学 | A kind of zigzag Row Piles Supporting Structure |
| CN110309557A (en) * | 2019-06-13 | 2019-10-08 | 中建一局集团第二建筑有限公司 | A kind of construction method lifted on double support pile system deep basal pit side |
| CN110777806A (en) * | 2019-11-12 | 2020-02-11 | 广东省工程勘察院 | Multi-connecting-rod plane frame permanent supporting structure and construction process thereof |
| CN110777806B (en) * | 2019-11-12 | 2020-11-27 | 广东省工程勘察院 | Multi-connecting-rod plane frame permanent supporting structure and construction process thereof |
| CN112962667A (en) * | 2021-02-08 | 2021-06-15 | 中国建筑第八工程局有限公司 | Outer wall structure of sinking yard and construction method thereof |
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