CN203684222U - Pile-anchor combined supporting structure with rotary jet enlarging head pre-stressed anchor rods - Google Patents

Pile-anchor combined supporting structure with rotary jet enlarging head pre-stressed anchor rods Download PDF

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Publication number
CN203684222U
CN203684222U CN201420055823.XU CN201420055823U CN203684222U CN 203684222 U CN203684222 U CN 203684222U CN 201420055823 U CN201420055823 U CN 201420055823U CN 203684222 U CN203684222 U CN 203684222U
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China
Prior art keywords
pile
anchor
supporting
soil
piles
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CN201420055823.XU
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Chinese (zh)
Inventor
陈江滨
洪昌华
李树枝
江志峰
陈松炎
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Zhejiang Guotai Construction Group Co Ltd
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Zhejiang Guotai Construction Group Co Ltd
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Abstract

The utility model relates to a pile-anchor combined supporting structure with rotary jet enlarging head pre-stressed anchor rods. The combined supporting structure comprises supporting piles and the anchor rods, wherein the supporting piles comprise concrete grouting piles and water-stop piles, the two ends of the anchor rods are arranged in the supporting piles and the soil layer respectively, and the ends, arranged in the soil layer, of the anchor rods are large-diameter concrete pile body sections which are anchored and tensioned through pre-stressed anchor bars and anchorage devices arranged on the supporting piles. The diameter of the large-diameter concrete pile body sections is larger than that of a conventional anchor rod section, so that the contact area of the bottom of concrete soil and the soil layer is increased to increase friction resistance, the pre-stressed anchor bars are additionally arranged in the formed concrete soil pile bodies to form reinforced concrete soil piles, and bending resistance and shearing strength of a concrete soil body are greatly improved.

Description

Jet grouting enlarged footing prestressed anchor pile anchor combination supporting and protection structure
Technical field
The present invention relates to the deep foundation pit supporting structure in building field, particularly a kind of jet grouting enlarged footing prestressed anchor pile anchor combination supporting and protection structure.
Background technology
Common traditional pattern foundation pit supporting structure form has: soil nailing, anchor pole, cantilevered campshed, inner supporting structure, diaphragm wall etc.Soil nailing, the anchor pole scope of application are little, and foundation ditch security and stability is poor; The displacement of the identical cutting depth of cantilevered campshed is large, and internal force is large, and supporting and protection structure needs more heavy in section and insertion depth; Inner supporting structure complex forms, construction inconvenience, construction are removed length consuming time, are had high input; Construction of diaphragm wall difficulty is large, expense is high.
Summary of the invention
That technical problem to be solved in the utility model is to propose for prior art is a kind of simple in structure, the deep foundation pit supporting structure of technical feasibility, safe and reliable, economical rationality.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that
Jet grouting enlarged footing prestressed anchor pile anchor combination supporting and protection structure, comprise soldier pile and anchor pole, soldier pile comprises concrete filling pile and water-seal pile, it is characterized in that, described anchor pole two ends are located at respectively in soldier pile and soil layer, the described end of being located in soil layer is major diameter cement pile body section, and described major diameter cement pile body section is by prestressing force dowel and be located at the ground tackle anchoring stretch-draw on soldier pile.
The major diameter cement pile body section that more than two reaming slip casting that distributes on described anchor pole forms.
The anchor pole of described connection soil layer and soldier pile forms the upper and lower layer distributed of some rows.
Anchoring stretch-draw on one row's prestressed anchor ground tackle capping beam of the described the superiors, is positioned at ground tackle on the anchor pole of lower floor by the steel wale anchoring stretch-draw of bearing down on one on soldier pile.
Effect of the present utility model is: 1, broken through the forbidden zone of can not construct anchor pole or soil nailing in Muddy Bottoms and artesian flow layer of sand, adopted the supporting of jet grouting enlarged footing prestressed anchor pile anchor combination can solve the limited problem of anchored force; 2, in bracing of foundation pit, adopt the supporting of jet grouting enlarged footing prestressed anchor pile anchor combination can cancel inner support, shortened the duration, saved support cost, and made shoveling work very easy; 3, the required plant equipment of pile-anchor retaining structure construction is simple to operate, labour intensity is little, cost is relatively low, is conducive to save engineering cost; 4, by setting many row's jet grouting enlarged footing prestressed anchor anchoring piles, and be connected by waist rail, form a gravity retaining structures, can effectively prevent upper side slope slippage, protuberance etc.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, will the accompanying drawing of required use in embodiment be briefly described below.
Fig. 1 is the whole implementation figure of jet grouting enlarged footing prestressed anchor of the present utility model (row) Anchor-Pile Retaining Structure structure;
Fig. 2 is the whole implementation figure of jet grouting enlarged footing prestressed anchor of the present utility model (arranging) Anchor-Pile Retaining Structure structure more;
Fig. 3 is that the major diameter cement soil pile of Fig. 1 forms schematic diagram.
Shown in figure 1, major diameter cement pile body section, 11, enlarged footing, 12, form anchor, 2, prestressing force dowel, 3, ground tackle, 41, concrete filling pile, 42, water-seal pile, 5, waist rail, 6, soil layer.
The specific embodiment
In order to make those skilled in the art person understand better the scheme of the utility model embodiment, below in conjunction with drawings and embodiments, the embodiment of the present invention is described in further detail.
As shown in Figure 1: jet grouting enlarged footing prestressed anchor pile anchor combination supporting and protection structure, comprise soldier pile and anchor pole, soldier pile comprises concrete filling pile 41 and water-seal pile 42, described anchor pole two ends are located at respectively in soldier pile and soil layer 6, the described end of being located in soil layer is major diameter cement pile body section 1, and described major diameter cement pile body section is by prestressing force dowel 2 and be located at the ground tackle 3 anchoring stretch-draw on soldier pile.As shown in Figure 3, prestressing force dowel 2 ends are fixing by form anchor (12), and prestressing force dowel 2 adopts non-bending steel cable.
In addition, major diameter cement pile body section forms by boring, reaming, rotary jet grouting, major diameter cement pile body section diameter is preferably the 800mm into Φ 600mm-Φ, adopt water under high pressure or cement paste to spray reaming, also can set up an even multiple reaming in middle part, thereby slip casting forms multiple major diameter cement pile body segment bodies.
Major diameter cement soil pile diameter described in the utility model, reaming number of times, prestressing force dowel length and diameter, prestressed anchor level inclination, space length between supporting piles all can be determined according to on-the-spot actual needs.
Be a kind of improvement project as shown in Figure 2, the anchor pole that connects soil layer and soldier pile forms two rows, is upper and lower two-layer distribution.Anchoring stretch-draw on one row's prestressed anchor ground tackle capping beam of the superiors, is positioned at ground tackle on the anchor pole of lower floor by the steel wale 5 anchoring stretch-draw of bearing down on one on soldier pile.
The utility model major diameter cement pile body section is compared the enlarged-diameter of conventional anchor pole section, cement-soil bottom and the contact area of soil layer are increased, increase frictional resistance, in the cement soil pile forming, increase prestressing force dowel, form reinforced cement earth pile body, greatly improved bending resistance, the shear strength of soil-cement body.Meanwhile, major diameter cement pile body section has been improved the mechanical property of Loose Soft Soil Fields layer to a great extent in rotary jet grouting process, and bonding force, angle of internal friction value, the impermeability of the soil body are improved significantly.

Claims (5)

1. jet grouting enlarged footing prestressed anchor pile anchor combination supporting and protection structure, comprise soldier pile and anchor pole, soldier pile comprises concrete filling pile and water-seal pile, it is characterized in that, described anchor pole two ends are located at respectively in soldier pile and soil layer, the described end of being located in soil layer is major diameter cement pile body section, and described major diameter cement pile body section is by prestressing force dowel and be located at the ground tackle anchoring stretch-draw on soldier pile.
2. supporting and protection structure according to claim 1, is characterized in that, described major diameter cement pile body section diameter is Φ 600mm-Φ 800mm.
3. supporting and protection structure according to claim 1, is characterized in that, the major diameter cement pile body section that more than two reaming slip casting that distributes on described anchor pole forms.
4. supporting and protection structure according to claim 1, is characterized in that, the anchor pole of described connection soil layer and soldier pile forms the upper and lower layer distributed of some rows.
5. supporting and protection structure according to claim 3, it is characterized in that, described anchor pole forms the upper and lower layer distributed of two rows, and anchoring stretch-draw on row's prestressed anchor ground tackle capping beam of the superiors is positioned at ground tackle on the anchor pole of lower floor by the steel wale anchoring stretch-draw of bearing down on one on soldier pile.
CN201420055823.XU 2014-01-28 2014-01-28 Pile-anchor combined supporting structure with rotary jet enlarging head pre-stressed anchor rods Active CN203684222U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420055823.XU CN203684222U (en) 2014-01-28 2014-01-28 Pile-anchor combined supporting structure with rotary jet enlarging head pre-stressed anchor rods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420055823.XU CN203684222U (en) 2014-01-28 2014-01-28 Pile-anchor combined supporting structure with rotary jet enlarging head pre-stressed anchor rods

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CN203684222U true CN203684222U (en) 2014-07-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804092A (en) * 2016-05-03 2016-07-27 泰兴市第建筑安装工程有限公司 Anchor support device for deep foundation pit piles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804092A (en) * 2016-05-03 2016-07-27 泰兴市第建筑安装工程有限公司 Anchor support device for deep foundation pit piles

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