CN206157726U - Composite pile type structure suitable for coast deep dredger fill soil foundation handle - Google Patents

Composite pile type structure suitable for coast deep dredger fill soil foundation handle Download PDF

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Publication number
CN206157726U
CN206157726U CN201621117598.3U CN201621117598U CN206157726U CN 206157726 U CN206157726 U CN 206157726U CN 201621117598 U CN201621117598 U CN 201621117598U CN 206157726 U CN206157726 U CN 206157726U
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China
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pile
stake
spray
way stirring
stirring powder
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CN201621117598.3U
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Inventor
李照东
胡永涛
陈广飞
杨鹏
鲍尤智
丁锴
周金学
章定文
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Jiangsu Port Construction Group Co., Ltd
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Lianyungang Port Engineering Co
Southeast University
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Abstract

The utility model discloses a composite pile type structure suitable for coast deep dredger fill soil foundation handle, spout stake and upper portion mattress layer including stake of prestressed concrete thin -wall hollow side and the two -way stirring powder of nail type. The stake of prestressed concrete thin -wall hollow side is longer rigidity stake, passes dredger fill layer to supporting course, is used for control to subside, simultaneously sets up the reinforced concrete cushion cap in prestressed concrete thin -wall hollow side's pile bolck portion, is used for adjusting the pile -soil load and shares and comparing, the high bearing capacity performance of full play prestressed concrete thin -wall hollow side's stake, the two -way stirring powder of nail type spouts the stake for flexible stake, based on the composite foundation stress transfer with bear the principle of optimality, consolidate the hydraulic reclamation weak soil layer that upper portion additional stress is big especially, improve upper portion pile body displacement ratio, the two -way stirring powder of stake of prestressed concrete thin -wall hollow side and nail type spouts the stake to be arranged in turn, can enough satisfy bearing capacity and post -construction settlement's requirement, can practice thrift engineering cost again.

Description

A kind of compound pile-type structure processed suitable for coastal deep reclaimed ground
Technical field
This utility model is related to a kind of compound pile-type structure processed suitable for coastal deep reclaimed ground.
Background technology
China possesses the coastline of 18000km, coastal to have Liaoning, Hebei, Tianjin, Shandong, Jiangsu, Shanghai, Zhejiang, good fortune Build, Taiwan, Guangdong, 12 provinces, municipalities and autonomous regions such as Guangxi and Hainan, tidal land develops very much, and potentiality to be exploited is big.Meanwhile, with me The fast development of state's coastal cities economic construction, coastal area population is more and more, also increasing to the demand in soil, and It is then the effective way for alleviating shortage of land resource situation using the sea reclamation of coastal Intertidal zone mud beach.According to the preliminary statistics, China has reclaimed fields from the sea about 1.2 ten thousand hectares since founding of New, equivalent to the 55% of existing beach area, is filled out with blowing-filling sludge Extra large epeirogenetic has become the important means of coastal cities land development.Particularly in port construction, on the one hand, Container Terminal land-based area Formation need substantial amounts of engineered packings, on the other hand, navigation channel needs to excavate substantial amounts of bottom silt again with the enlarging of basin, if The mud excavated is used for into sea reclamation, coastal waters throwing mud can not only be substantially reduced and abandoned the pollution become silted up to marine environment, additionally it is possible to be saved About epeirogenetic engineering cost.
Reclaiming land around sea is generally formed using hydraulic reclamation mode, builds enclose sth. made by twisting engineering first, and shallow sea is surrounded, and is formed and is fixed Hydraulic reclamation region, then, dredged channel bed mud or shallow sea mud and sea water are mixed into in certain proportion mud, and use blowpipe Hydraulic reclamation region is transported to, Jing after fall silt, bleeding, consolidation land-based area is formed, therefore, blowing-filling sludge has special engineering Matter --- high-moisture percentage, high-compressibility, high void ratio, high sensitivity, structural difference, the degree of consolidation are low.Reclaimed ground one As can not meet requirement of engineering, it is necessary to could use through consolidation process.
Be the requirement for meeting the control of ground bearing capacity for reclaimed ground, typically can using preloading, Vacuum-loading Pre-pressing Method, heavy-tamping method, cement mixing pile, crushed stone pile, prefabricated tubular pile, low strength pile compound foundation method Deng these engineering methods all play a role in reclaimed ground, but have its scope of application, there is certain limitation Property.Piling prepressing is limited by the duration, and Deep Mix Column into Supporting is then limited by stir process depth and settlement after construction etc., in advance Then easily is there is bearing capacity reduction by the pile-side negative friction effect of later stage settlement of foundation induction in stress reinforced concrete pipe pile, and Limited by its construction costs, so conventional method for processing foundation can not simultaneously meet bearing capacity, Deformation control and saving The requirement of cost.
Utility model content
Utility model purpose:For above-mentioned prior art, there is provided a kind of to process suitable for coastal deep reclaimed ground Compound pile-type structure, can meet the requirement of bearing capacity control.
Technical scheme:A kind of compound pile-type structure processed suitable for coastal deep reclaimed ground, including prestressing force is mixed Solidifying soil thin-walled hollow square pile and nail type two-way stirring powder-spray pile and top mattress layer;The prestressed concrete thin-walled hollow square pile Transversely arrange with longitudinal direction successively alternate intervals with nail type two-way stirring powder-spray pile, the prestressed concrete thin-walled hollow square pile Bottom squeeze into soil supporting layer;The top of the prestressed concrete thin-walled hollow square pile arranges reinforced concrete pile cap, institute Reinforced concrete pile cap top surface and nail type two-way stirring powder-spray pile top surface are stated in same elevation, is laid on described in the mattress layer The top of prestressed concrete thin-walled hollow square pile and nail type two-way stirring powder-spray pile, laying steel modeling lattice in the middle of the mattress layer Grid.Prestressed concrete thin-walled hollow square pile can effective control upper load to bottom supporting course, and then control reclaimed ground Deflection.The more conventional soil cement powder-spray pile of nail type two-way stirring powder-spray pile, can make full use of soil stress transfer law, strengthen Soil body top strength of composite foundation, greatly improves bearing capacity of single pile, while top pile body replacement rate can also be improved, between increase stake Away from saving construction costs.It is two-way that mattress layer setting can improve prestressed concrete thin-walled hollow square pile, nail type in composite foundation The collective effect characteristic of stirring powder-spray pile and inter-pile soil, reduces the stress concentration of prestressed concrete thin-walled hollow square pile, makes Type two-way stirring powder-spray pile and inter-pile soil must be followed closely just to participate in undertaking load at the load-bearing initial stage, it is ensured that stake soil being capable of shared lotus Carry.
Further, the stake position of the prestressed concrete thin-walled hollow square pile and nail type two-way stirring powder-spray pile is in length and breadth etc. Spacing is arranged;Laterally or longitudinally in rows of nail type two-way stirring powder-spray pile, adjacent two nail type two-way stirring powder-spray piles Centre position also sets and is equipped with a nail type two-way stirring powder-spray pile, and the length of the nail type two-way stirring powder-spray pile is barged-in fill The 1/3~1/2 of foundation thickness.
Further, the length of side of the prestressed concrete thin-walled hollow square pile be 0.45~0.6m, internal diameter be 0.25~ 0.35m, pile spacing is 3.0~3.6m;The top enlarged footing stake footpath of the nail type two-way stirring powder-spray pile be 0.8~1.0m, institute 4~6m of height of enlarged base is stated, the bottom stake footpath of nail type two-way stirring powder-spray pile is 0.5~0.6m, and pile spacing is 1.5~1.8m.
Further, the reinforced concrete pile cap length of side on the prestressed concrete thin-walled hollow square pile top be 1.6~ 1.8m, 0.4~0.5m of thickness, are cast-in-place or prefabricated reinforced concrete pile cap.
Further, the mattress layer is laid using rubble point two-layer, and the thickness of the mattress layer is no less than 50cm, One layer of steel is respectively laid in the bottom and intermediate layer of mattress layer mould grid.
Beneficial effect:
1. prestressed concrete thin-walled hollow square pile processes depth greatly, is capable of the weak soil of reinforcing deep, so as to significantly Reduce foundation deformation;Compare with pile for prestressed pipe, the square pile external surface area that same volume concrete is formed is big, and because profile is in Square or many corner types, pile body and the angle of repose of soil much bigger than circular surface in soil layer so that in equal geological conditions Under, square pile can obtain bigger bearing capacity.The soil plug that prestressed concrete thin-walled hollow square pile is internally formed can be carried further High pile body bearing capacity.The reinforced concrete pile cap arranged at the top of prestressed concrete thin-walled hollow square pile can adjust stake soil lotus Share ratio is carried, the high-bearing capacity performance of prestressed concrete thin-walled hollow square pile is given full play to.
2. nail type two-way stirring powder-spray pile is put based on composite foundation Stress Transfer with the principle of optimality, raising top pile body is carried Rate is changed, emphasis reinforces the big Soft Soil Layer of top additional stress.Compare with common uiform section soil cement powder-spray pile, nail type two-way stirring Powder-spray pile can increase stake soil anchoring effect, on the premise of bearing capacity is ensured, increase pile spacing, save construction costs.
Description of the drawings
The compound pile-type schematic cross-sectional views of Fig. 1;
The compound pile-type schematic top plan views of Fig. 2.
Specific embodiment
For the NEW TYPE OF COMPOSITE pile-type that coastal deep type reclaimed ground is processed, including prestressed concrete thin-walled hollow side Stake and nail type two-way stirring powder-spray pile and top mattress layer.Prestressed concrete thin-walled hollow square pile and nail type two-way stirring powder spray Stake stake position equidistant interval setting in length and breadth successively, every row prestressed concrete thin-walled hollow square pile is set, and the prestressing force with row is mixed Solidifying soil thin-walled hollow square pile and the spaced setting of nail type two-way stirring powder-spray pile.Laterally or longitudinally rows of nail type two-way stirring In powder-spray pile, the centre position of two adjacent nail type two-way stirring powder-spray piles also sets and is equipped with a nail type two-way stirring powder spray Stake, and cause the outer layer of compound pile-type structure to be nail type two-way stirring powder-spray pile, as shown in Figure 2.
As shown in figure 1, the length of nail type two-way stirring powder-spray pile is the 1/3~1/2 of reclaimed ground thickness.Prestressing force is mixed The length of side of solidifying soil thin-walled hollow square pile is 0.45~0.6m, and internal diameter is 0.25~0.35m, and pile spacing is 3.0~3.6m;Nail type is double To stirring powder-spray pile top enlarged footing stake footpath be 0.8~1.0m, 4~6m of height of enlarged base, nail type two-way stirring powder-spray pile Bottom stake footpath is 0.5~0.6m, and pile spacing is 1.5~1.8m.The reinforced concrete on prestressed concrete thin-walled hollow square pile top The native cushion cap length of side is 1.6~1.8m, 0.4~0.5m of thickness;The thickness of mattress layer is no less than 50cm.
In the present embodiment, prestressed concrete thin-walled hollow square pile and nail type two-way stirring powder-spray pile are in the plane in pros Shape arranges that pile spacing is 1.7m, and prestressed concrete thin-walled hollow square pile pile spacing is 3.4m.Prestress thin wall square pile size is 0.45 × 0.45m, internal diameter is 0.25m, strength grade of concrete C80, a length of 38m of stake, squeezes into supporting course 1m.Prestressed concrete Thin-walled hollow square pile top adopts size for the cast-in-situ steel reinforced concrete cushion cap of 160 × 160 × 40cm, and concrete grade is C30. The a length of 15m of nail type two-way stirring Powder-jet Pile, top enlarged footing stake footpath is 0.9m, and high 5m, bottom stake footpath is 0.5m, the long 11m of stake. Reinforced concrete pile cap top surface is in same elevation with nail type two-way stirring powder-spray pile top surface.Prestressed concrete thin-walled hollow side Stake and nail type two-way stirring powder-spray pile top arrange mattress layer.Prestressed concrete thin-walled hollow square pile and nail type two-way stirring powder The blotter of 50cm is laid on spray stake top, and a point two-layer is laid, and respectively one layer of steel of laying moulds grid for bottom and intermediate layer.
The construction method of the compound pile-type structure processed suitable for coastal deep reclaimed ground, comprises the steps:
Step 1, determines that prestressed concrete thin-walled hollow square pile and nail type are two-way in coastal deep reclaimed ground region The stake position of stirring powder-spray pile, the stake position of prestressed concrete thin-walled hollow square pile and the stake position of nail type two-way stirring powder-spray pile are along horizontal To with longitudinal direction successively alternate intervals arrangement, and cause the outer layer of compound pile-type structure to be nail type two-way stirring powder-spray pile.
Step 2, the construction of prestressed concrete thin-walled hollow square pile:
The construction of prestressed concrete thin-walled hollow square pile lays out pile from district center is reinforced to both sides, and pile extension is welded using steel end plate Connection is welded, and the pile joint for welding starts injection in natural cooling using static pressure method or hammering method, and work progress pile hangs down Straight degree deviation is not more than 0.5%, and soil supporting layer is squeezed in the bottom of prestressed concrete thin-walled hollow square pile, and all prestressing force are mixed After solidifying soil thin-walled hollow square pile construction is finished, the stake top discrepancy in elevation should be controlled within 15cm.
Step 3, the construction of nail type two-way stirring powder-spray pile:
Nail type two-way stirring cement injection pile lays out pile from district center is reinforced to both sides, and nail type two-way stirring powder-spray pile top is expanded Major part stirs two spraying construction techniques using four, and bottom pile body stirs a spraying construction technique using two.Wherein, parameters of construction technology is:Water Mud adopts 42.5 slag cements, and cement mixed weight is be reinforced wet soil quality 12%~20%, 1.0~1.2m/ of rate of penetration Min, lifts 0.5~0.8m/min of speed, 30~50 turns/min of rotary speed, 0.4~0.7MPa of spray power during drilling, interior brill Bar electric current is 20~30A, and outer drilling rod electric current is 60~100A.
Specific construction process:
(1) pile dusting machine positioning;
(2) native sinking is cut, while open sending grey pump to soil body spraying cement powder, two groups of blade forward and reverse rotations simultaneously are sunk, Until enlarged footing projected depth;
(3) blade is shunk, two groups of blades are while forward and reverse rotations, blender persistently sinks, until projected depth;
(4) stirring is lifted, grey pump is sent in closing, two groups of blades forward and reverse rotation stirring concrete earth simultaneously, to enlarged footing bottom surface Absolute altitude;
(5) blade is stretched, changes the direction of rotation of inside and outside drilling rod, stirring vane is stretched over into diameter 900mm;Blender is carried Rise, two groups of blades forward and reverse rotation stirring concrete earth simultaneously, until earth's surface or design stake top absolute altitude above 50cm;
(6) native sinking is cut, while open sending grey pump, to soil body water spray plaster, two groups of blades are while forward and reverse rotary cutting Cut, stir the soil body, until enlarged footing projected depth;
(7) stirring is lifted, grey pump is sent in closing, two groups of blades forward and reverse rotation stirring concrete earth simultaneously until earth's surface or sets Meter stake top absolute altitude above 50cm, completes single pile construction.
Step 4, arranges armored concrete and holds at the top of each prestressed concrete thin-walled hollow square pile using cast-in-place method Platform.Specific construction process is:First in stake top banding steel cage, cast-in-situ template is set, then carries out concreting, treat that concrete coagulates Gu rear form removal.
Step 5, the construction of mattress layer:
After reinforced concrete pile cap is conserved 7 days, blotter is laid in stake top, blotter is divided into two-layer and is spread If first laying one layer of steel in bottom and moulding grid, the blotter of one layer of 25cm is re-layed, Jing after road roller is rolled the second layer is laid Steel moulds grid, re-lays the blotter of one layer of 25cm, and the laying of blotter is completed Jing after rolling.
This utility model is to save construction costs, by prestressing force on the premise of the control of ground bearing capacity is met Concrete thin-wall hollow square pile and nail type two-way stirring powder-spray pile use in conjunction are formed polynary multiple processing deep reclaimed ground Close foundation technical.On the one hand, prestressed concrete thin-walled hollow square pile processes depth greatly, can reinforce the Soft Soil Layer in deep, from And settlement after construction is dramatically reduced;The soil plug that simultaneously prestressed concrete thin-walled hollow square pile is internally formed can improve pile body Bearing capacity.On the other hand, nail type two-way stirring powder-spray pile is reinforced based on composite foundation Stress Transfer with the principle of optimality, emphasis is carried The big Soft Soil Layer of top additional stress, improve top pile body replacement rate, solve the problems, such as foundation bearing capacity with it is stable.In advance should simultaneously The reinforced concrete pile cap that power concrete thin-wall hollow square pile top is arranged can be used to adjust bearing ratio in piles and soils, fully send out Wave the high-bearing capacity performance of prestressed concrete thin-walled hollow square pile.Additionally, blotter can improve in composite foundation in advance should The collective effect characteristic of power concrete thin-wall hollow square pile, nail type two-way stirring powder-spray pile and inter-pile soil, reduces prestressing force and mixes The stress concentration of solidifying soil thin-walled hollow square pile so that nail type two-way stirring powder-spray pile and inter-pile soil just participate in undertaking at the load-bearing initial stage Load, it is ensured that stake soil being capable of shared load.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and Retouching also should be regarded as protection domain of the present utility model.

Claims (5)

1. a kind of compound pile-type structure processed suitable for coastal deep reclaimed ground, it is characterised in that:It is mixed including prestressing force Solidifying soil thin-walled hollow square pile and nail type two-way stirring powder-spray pile and top mattress layer;The prestressed concrete thin-walled hollow square pile Transversely arrange with longitudinal direction successively alternate intervals with nail type two-way stirring powder-spray pile, the prestressed concrete thin-walled hollow square pile Bottom squeeze into soil supporting layer;The top of the prestressed concrete thin-walled hollow square pile arranges reinforced concrete pile cap, institute Reinforced concrete pile cap top surface is stated with nail type two-way stirring powder-spray pile top surface in same elevation, the mattress layer is laid on pre- answering The top of power concrete thin-wall hollow square pile and nail type two-way stirring powder-spray pile, laying steel modeling grid in the middle of the mattress layer.
2. the compound pile-type structure processed suitable for coastal deep reclaimed ground according to claim 1, its feature exists In:The stake position of the prestressed concrete thin-walled hollow square pile and nail type two-way stirring powder-spray pile is equally spaced in length and breadth;Laterally Or in the rows of nail type two-way stirring powder-spray pile in longitudinal direction, the centre position of two adjacent nail type two-way stirring powder-spray piles also sets and adds A nail type two-way stirring powder-spray pile is provided with, the length of the nail type two-way stirring powder-spray pile is the 1/3 of reclaimed ground thickness ~1/2.
3. the compound pile-type structure processed suitable for coastal deep reclaimed ground according to claim 1 and 2, its feature It is:The length of side of the prestressed concrete thin-walled hollow square pile be 0.45~0.6m, internal diameter be 0.25~0.35m, pile spacing For 3.0~3.6m;The top enlarged footing stake footpath of the nail type two-way stirring powder-spray pile be 0.8~1.0m, the height of enlarged base 4 ~6m, the bottom stake footpath of nail type two-way stirring powder-spray pile is 0.5~0.6m, and pile spacing is 1.5~1.8m.
4. the compound pile-type structure processed suitable for coastal deep reclaimed ground according to claim 3, its feature exists In:The reinforced concrete pile cap length of side on the prestressed concrete thin-walled hollow square pile top be 1.6~1.8m, thickness 0.4~ 0.5m, is cast-in-place or prefabricated reinforced concrete pile cap.
5. the compound pile-type structure processed suitable for coastal deep reclaimed ground according to claim 1 or 4, its feature It is:The mattress layer is laid using rubble point two-layer, and the thickness of the mattress layer is no less than 50cm, at the bottom of mattress layer Respectively one layer of the laying steel moulds grid for portion and intermediate layer.
CN201621117598.3U 2016-10-12 2016-10-12 Composite pile type structure suitable for coast deep dredger fill soil foundation handle Active CN206157726U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106245643A (en) * 2016-10-12 2016-12-21 连云港港务工程公司 A kind of compound pile-type structure being applicable to the process of coastal deep reclaimed ground and construction method
CN108999204A (en) * 2018-09-25 2018-12-14 大连理工大学 A kind of skirt-type adds partition diaphram wall-stake composite type base

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106245643A (en) * 2016-10-12 2016-12-21 连云港港务工程公司 A kind of compound pile-type structure being applicable to the process of coastal deep reclaimed ground and construction method
CN108999204A (en) * 2018-09-25 2018-12-14 大连理工大学 A kind of skirt-type adds partition diaphram wall-stake composite type base

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Address after: 222043 Jiangsu Province, Lianyungang City Lianyun District No. 260 Su Lu Yun

Co-patentee after: SOUTHEAST University

Patentee after: Jiangsu Port Construction Group Co., Ltd

Address before: 222043 Jiangsu Province, Lianyungang City Lianyun District No. 260 Su Lu Yun

Co-patentee before: SOUTHEAST University

Patentee before: LIANYUNGANG HARBOUR ENGINEERING CONSTRUCTION Co.,Ltd.

Address after: 222043 Jiangsu Province, Lianyungang City Lianyun District No. 260 Su Lu Yun

Co-patentee after: SOUTHEAST University

Patentee after: LIANYUNGANG HARBOUR ENGINEERING CONSTRUCTION Co.,Ltd.

Address before: 222043 Jiangsu Province, Lianyungang City Lianyun District No. 260 Su Lu Yun

Co-patentee before: SOUTHEAST University

Patentee before: LIANYUNGANG HARBOUR ENGINEERING Co.