CN211547744U - Novel deep foundation pit supporting structure - Google Patents
Novel deep foundation pit supporting structure Download PDFInfo
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- CN211547744U CN211547744U CN201922137094.8U CN201922137094U CN211547744U CN 211547744 U CN211547744 U CN 211547744U CN 201922137094 U CN201922137094 U CN 201922137094U CN 211547744 U CN211547744 U CN 211547744U
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- 238000004873 anchoring Methods 0.000 claims abstract description 43
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 38
- 239000004568 cement Substances 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000009412 basement excavation Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A novel deep foundation pit supporting structure is shown in figure 1, and comprises a pile top prestressed anchor cable 1, an external prestressed anchor cable 2, a prestressed support 3, a reinforced concrete supporting pile 4, a pile cap 5, a pile top prestressed anchor cable anchoring section 6, an external prestressed anchoring section 7, a cement mixing pile 8, a reinforced concrete supporting pile 4 filled between piles 9, a pile top inner support 11 and an external prestressed anchor pile section 14.
Description
Technical Field
The utility model belongs to the geotechnical engineering field relates to a deep basal pit supporting scheme, specifically is a novel deep basal pit supporting construction and construction process.
Background
In the field of deep foundation pit support, a support pile (wall) is very widely applied, and meanwhile, the application of a prestressed anchor cable (anchor rod) technology established on the basis of the support pile (wall) is also very wide, so that a composite structure of the support pile (wall) and the anchor cable (anchor rod) technology has a very good effect in the north or in an area with relatively low underground water content.
However, in coastal soft soil areas, the lateral pressure of deep foundation pits is very high, on one hand, the process of forming holes in soft soil by anchor cables (anchor rods) is very difficult, and on the other hand, the anchoring force of the anchor cables (anchor rods) in the soft soil foundation is very small, so that the supporting requirement of the foundation pits is difficult to meet, and accidents frequently occur in actual engineering.
Based on the above reasons, design unit generally adopts the effect of supporting in the foundation ditch and replacing anchor rope (stock), but along with the increase of foundation ditch span, the interior support technique that satisfies foundation ditch support internal force demand can lead to the construction of foundation ditch very complicated loaded down with trivial details on the one hand, and delays the time limit for a project and increases engineering cost, and on the other hand supports in the deep basal pit and will demolish in the later stage, causes the huge waste of resource.
In order to solve the difficult problem, when having solved anchor rope (stock) in soft soil foundation pore-forming technique and improving anchor rope anchorage force in soft foundation, the utility model provides a novel supporting construction and anchor rope (stock) embodiment and construction process, through the implementation of this technique for foundation ditch anchor pile (wall) provide reliable holding power, reduce or cancel interior support, practice thrift the cycle and the expense of soft soil deep basal pit construction greatly.
Disclosure of Invention
In order to achieve the above object, the utility model relates to a novel deep basal pit support technical scheme, concrete content is as follows:
the utility model provides a novel deep basal pit supporting construction, pile bolck prestressed anchorage cable 1, external prestressed anchorage cable 2, prestressed support 3, reinforced concrete fender pile 4, pile cap 5, pile bolck prestressed anchorage cable anchor section 6, external prestressed anchorage section 7, soil cement mixing pile 8, fill 9 between the stake of reinforced concrete fender pile 4, foundation ditch pit bottom 10, support 11 in the pile bolck, the inside part 12 in the foundation ditch pit, foundation ditch pit outer part 13, external prestressed anchorage crosses stake section 14.
The method is characterized in that: the pile top prestressed anchor cable 1 is arranged in the range of the outer portion 13 of the foundation pit, the upper end of the pile top prestressed anchor cable 1 is anchored on the pile cap 5 through an anchorage device, the lower end of the pile top prestressed anchor cable 1 is provided with a pile top prestressed anchor cable anchoring section 6, the pile top prestressed anchor cable anchoring section 6 generates anchoring force through consolidation with the surrounding soil body, and the included angle alpha between the pile top prestressed anchor cable 1 and the reinforced concrete support pile 4 is not more than 45 degrees.
The external prestressed anchor cable 2 is arranged in the range of the part 12 in the foundation pit, and the upper end of the external prestressed anchor cable 2 is fixed on the pile cap 5 through an anchorage device; the middle part of the external prestressed anchor cable 2 is fixed on a reinforced concrete supporting pile 4 through a prestressed bracket 3; the lower end of the external prestressed anchorage cable 2 is provided with an external prestressed anchorage pile passing section 14, and the lower end of the external prestressed anchorage pile passing section 14 is provided with an external prestressed anchorage section 7.
The external prestressed anchorage pile-passing section 14 is bonded in the combination of the cement soil mixing pile 8, the reinforced concrete support pile 4 and the filling 9 between the piles through anchorage.
The external prestressed anchoring section 7 is arranged in the range of the outer side part 13 of the foundation pit and generates anchoring force through consolidation with the surrounding soil body.
The utility model relates to a novel deep basal pit supporting construction, 1 upper end of pile top prestressed anchorage cable is passed through ground tackle anchor on pile cap 5, alpha between pile top prestressed anchorage cable 1 and the reinforced concrete fender pile 4 is not more than 45, concreties mutually and produces the anchoring force with the underground rock mass through pile top prestressed anchorage cable anchoring section 6 that sets up at pile top prestressed anchorage cable 1 lower extreme, through locking prestressed anchorage cable and producing the pretension force at 5 upper portions of pile top pile cap, under the pretension effect, can prevent and reduce reinforced concrete fender pile 4 and take place to rotate the displacement to the foundation ditch inboard among the foundation ditch excavation process, realize the anchor effect.
The external prestressed anchor cable 2 is arranged in the range of an internal part 12 of a foundation pit, the upper end of the external prestressed anchor cable 2 is fixed on a pile cap 5 through an anchorage device, the middle part of the external prestressed anchor cable 2 is fixed on a reinforced concrete supporting pile 4 through a prestressed support 3, the lower end of the external prestressed anchor cable 2 is provided with an external prestressed anchoring through pile section 14, the lower end of the external prestressed anchoring through pile section 14 is provided with an external prestressed anchoring section 7, the external prestressed anchoring through pile section 14 is bonded in a cement mixing pile 8 and a combination of the reinforced concrete supporting pile 4 and an inter-pile filling 9 through anchoring, the external prestressed anchoring section 7 is arranged in the range of an external part 13 of the foundation pit, in the implementation process, firstly, the external prestressed anchoring section 7 at the lowest end of the external prestressed anchor cable 2 is applied with pretension, and is bonded in the cement mixing pile 8 and the reinforced concrete supporting pile 4 and the inter-pile filling 9 through anchoring through the external prestressed anchoring through pile section 14 In the combined body, the horizontal component of the anchoring counterforce of the external prestressed anchoring over-pile section 14 is an acting force which is vertical to the reinforced concrete supporting pile 4 and points to the outside of the foundation pit, so that the internal force of the pile body of the reinforced concrete supporting pile 4 is greatly reduced, meanwhile, after the external prestressed anchoring over-pile section 14 reaches the anchoring design strength, a proper time is selected to stretch and lock the prestressed anchor cable 2 on the upper part of the pile cap 5 to generate a pre-tensioning force, the external prestressed anchor cable 2 generates an acting force which is vertical to the reinforced concrete supporting pile 4 and points to the outside of the foundation pit through the prestressed support 3 fixed on the reinforced concrete supporting pile 4, so that the internal force of the pile body of the reinforced concrete supporting pile 4 is greatly reduced, and the effect of improving the internal force of the supporting pile body 4 by external prestress is realized.
The utility model has the benefits that: through implementing a neotype deep basal pit supporting construction stage by stage, provide a neotype supporting scheme for the deep basal pit for the construction progress reduces the time limit for a project, reduces engineering cost, increases the reliability of structure, reduces the waste of resource.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the reinforced concrete support piles 4 and the soil cement mixing piles 8.
Fig. 3 is a schematic plan view of the external prestressing.
Fig. 4 is a schematic structural view of embodiment 2.
In the figure: the pile comprises a pile top prestressed anchor cable 1, an external prestressed anchor cable 2, a prestressed support 3, a reinforced concrete supporting pile 4, a pile cap 5, a pile top prestressed anchor cable anchoring section 6, an external prestressed anchoring section 7, a cement mixing pile 8, a pile space filling 9 of the reinforced concrete supporting pile 4, a foundation pit bottom 10, a pile top inner support 11, a foundation pit inner part 12, a foundation pit outer part 13 and an external prestressed anchoring pile section 14.
Detailed Description
The structure and the advantages of the present invention will be further described with reference to fig. 1, fig. 2, fig. 3, and fig. 4.
Example 1
A novel deep foundation pit supporting structure is disclosed, as shown in figure 1, figure 2 and figure 3, the construction of reinforced concrete supporting piles 4 and cement soil mixing piles 8 is symmetrically carried out at the position of the pit wall of the foundation pit before the deep foundation pit is excavated, the filling 9 is carried out between the piles of the reinforced concrete supporting piles 4, then pile caps 5 are carried out, then pile top inner support 11 is carried out at the pile tops, then pile top prestressed anchor cables 1 are carried out, the upper ends of the pile top prestressed anchor cables 1 are anchored on the pile caps 5 through anchorage devices, alpha between the pile top prestressed anchor cables 1 and the reinforced concrete supporting piles 4 is not more than 45 degrees, the anchoring force is generated by the consolidation of pile top prestressed anchor cable anchoring sections 6 arranged at the lower ends of the pile top prestressed anchor cables 1 and underground rock bodies, the pretension force is generated by the tensioning of the anchor cables at the upper parts of the pile top pile caps 5, the rotation displacement of the reinforced concrete supporting piles 4 towards the inner side can be prevented and reduced in the excavation process of the foundation pit under the pretension, the internal force of the support 11 in the pile top is reduced, and the anchoring effect is achieved.
Before the foundation pit is excavated, the external prestressed anchor cable 2 is implemented, the external prestressed anchor cable 2 is arranged in the range of the inner part 12 of the foundation pit, the upper end of the external prestressed anchor cable 2 is fixed on the pile cap 5 by an anchorage device, the middle part of the external prestressed anchor cable 2 is fixed on the reinforced concrete supporting pile 4 by a prestressed support 3, the lower end of the external prestressed anchor cable 2 is provided with an external prestressed anchorage through pile section 14, the lower end of the external prestressed anchorage through pile section 14 is provided with an external prestressed anchorage section 7, the external prestressed anchorage through pile section 14 is bonded in a cement mixing pile 8 and a combination body of the reinforced concrete supporting pile 4 and a pile space filling 9 by anchoring, the external prestressed anchorage section 7 is arranged in the range of the outer part 13 of the foundation pit, before the foundation pit is excavated, the external prestressed anchorage section 7 at the lowest end of the external prestressed anchor cable 2 is implemented with prestressing force firstly, and the external prestressed anchorage through pile section 14 is bonded by anchoring In the combination body of the cement soil mixing pile 8, the reinforced concrete supporting pile 4 and the pile filling 9, the horizontal component of the anchoring reaction force of the external prestress anchoring pile passing section 14 is the acting force which is vertical to the reinforced concrete supporting pile 4 and points to the outer side of the foundation pit, the pile body internal force of the reinforced concrete supporting pile 4 is greatly reduced, meanwhile, after the external prestressed anchorage pile section 14 reaches the designed anchoring strength, the external prestressed anchorage cable 2 is tensioned on the upper part of the pile cap 5 by selecting proper time and position along with the excavation of the foundation pit to generate pretension, the external prestressed anchorage cable 2 generates acting force which is perpendicular to the reinforced concrete support pile 4 and points to the outer side of the foundation pit through the prestressed support 3 fixed on the reinforced concrete support pile 4, the pile body internal force of the reinforced concrete support pile 4 is greatly reduced, and the effect of improving the internal force of the reinforced concrete support pile 4 by external prestressing is realized.
Example 2
A novel deep foundation pit supporting structure is shown in figures 4, 2 and 3, a pile top inner support 11 is omitted on the basis of embodiment 1, and other structures and implementation sequences are the same as those of embodiment 1.
Claims (3)
1. The utility model provides a novel deep basal pit supporting construction, includes pile bolck prestressed anchorage cable (1), external prestressed anchorage cable (2), prestressed support (3), reinforced concrete fender pile (4), pile cap (5), pile bolck prestressed anchorage cable anchor section (6), external prestressed anchorage section (7), cement mixing pile (8), fill (9) between the stake of reinforced concrete fender pile (4), pile section (14) are crossed in external prestressed anchorage, its characterized in that: the pile top pre-stressed anchor cable (1) is arranged in the range of the outer part (13) of the foundation pit, the upper end of the pile top pre-stressed anchor cable (1) is anchored on a pile cap (5) through an anchorage device, the lower end of the pile top pre-stressed anchor cable (1) is provided with a pile top pre-stressed anchor cable anchoring section (6), the pile top pre-stressed anchor cable anchoring section (6) is solidified with the surrounding soil body to generate anchoring force, and the included angle alpha between the pile top pre-stressed anchor cable (1) and the reinforced concrete support pile (4) is not more than 45 degrees; the external prestressed anchor cable (2) is arranged in the range of the inner part (12) of the foundation pit, and the upper end of the external prestressed anchor cable (2) is fixed on the pile cap (5) through an anchorage device; the middle part of the external prestressed anchor cable (2) is fixed on a reinforced concrete supporting pile (4) through a prestressed bracket (3); the lower end of the external prestressed anchor cable (2) is provided with an external prestressed anchoring pile passing section (14), and the lower end of the external prestressed anchoring pile passing section (14) is provided with an external prestressed anchoring section (7).
2. A new type of deep foundation pit supporting structure as claimed in claim 1, wherein the external prestressed anchorage pile-passing section (14) is anchored and bonded in the combination of the soil cement mixing pile (8) and the reinforced concrete supporting pile (4) and the inter-pile filler (9).
3. A new type of deep foundation pit supporting structure as claimed in claim 1, wherein the external prestressed anchoring section (7) is located within the outer portion (13) of the foundation pit and generates anchoring force by anchoring with the surrounding soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922137094.8U CN211547744U (en) | 2019-12-03 | 2019-12-03 | Novel deep foundation pit supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922137094.8U CN211547744U (en) | 2019-12-03 | 2019-12-03 | Novel deep foundation pit supporting structure |
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| CN211547744U true CN211547744U (en) | 2020-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886298A (en) * | 2019-12-03 | 2020-03-17 | 珠海小可乐科技有限公司 | Novel deep foundation pit supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886298A (en) * | 2019-12-03 | 2020-03-17 | 珠海小可乐科技有限公司 | Novel deep foundation pit supporting structure |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240130 Address after: 519000 Office 1901, No. 169 Rongzhu Road, Hengqin New District, Zhuhai City, Guangdong Province Patentee after: Zhuhai railway construction building real estate Co.,Ltd. Country or region after: China Patentee after: ZHUHAI LCOLA TECHNOLOGY Co.,Ltd. Patentee after: NORTHWEST RESEARCH INSTITUTE Co.,Ltd. OF C R E C Patentee after: CHINA RAILWAY SHANGHAI DESIGN INSTITUTE GROUP Co.,Ltd. Address before: 519000, Room 218-193, Building 19, Creative Valley, No. 1889 Huandao East Road, Hengqin New District, Zhuhai City, Guangdong Province Patentee before: ZHUHAI LCOLA TECHNOLOGY Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |