CN211446886U - Secant pile grout stopping wall structure for water-rich karst development geology - Google Patents
Secant pile grout stopping wall structure for water-rich karst development geology Download PDFInfo
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- CN211446886U CN211446886U CN201922371737.5U CN201922371737U CN211446886U CN 211446886 U CN211446886 U CN 211446886U CN 201922371737 U CN201922371737 U CN 201922371737U CN 211446886 U CN211446886 U CN 211446886U
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model discloses a secant pile grout stop wall structure of water-rich karst development geology, which comprises a foundation, wherein at least one karst cave is arranged below the foundation, and at least one part of a proposed underground continuous wall passes through the karst cave; and occlusion pile insertion holes are vertically formed in the outer side of the foundation surface, penetrating through the proposed underground continuous wall corresponding to the karst cave, corresponding occlusion piles are inserted into the occlusion pile insertion holes, and the occlusion piles and the karst cave corresponding to the inner side of the proposed underground continuous wall form a closed space. The utility model discloses a set up the secant pile to form the enclosure space with corresponding the solution cavity, form and plan for the thick liquid wall that ends in the underground continuous wall outside, effectively prevent that the thick liquid from running off or the condition of hole collapse appearing in the underground continuous wall grooving in-process, and improve underground continuous wall's construction quality.
Description
Technical Field
The utility model relates to a only thick liquid wall construction technical field especially relates to secant pile of rich water karst development geology only thick liquid wall structure.
Background
The underground continuous wall has the characteristics of strong geological adaptability, excellent waterproof performance and small influence on surrounding buildings, and is widely applied to foundation pit supporting engineering of high-rise buildings. However, when the underground diaphragm wall is constructed in a groove under the condition of water-rich karst development geology, the slurry in the groove construction is easy to lose due to the karst cave and abundant underground water flow to cause hole collapse, or the groove forming quality is influenced due to the loss of cement slurry, so that a slurry stopping wall structure of the water-rich karst development geology needs to be provided on the outer side of the proposed underground diaphragm wall before the groove construction.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at overcoming the shortcoming and not enough among the prior art, providing the interlock stake of rich water karst development geology and ends thick liquid wall structure.
The secant pile grout stop wall structure for the water-rich karst development geology comprises a foundation, wherein at least one karst cave is arranged below the foundation, and at least one part of a proposed underground continuous wall penetrates through the karst cave; and occlusion pile insertion holes are vertically formed in the outer side of the foundation surface, penetrating through the proposed underground continuous wall corresponding to the karst cave, corresponding occlusion piles are inserted into the occlusion pile insertion holes, and the occlusion piles and the karst cave corresponding to the inner side of the proposed underground continuous wall form a closed space.
Rich water karst development geology's secant pile only starch wall structure, through setting up the secant pile to form the enclosure space with corresponding solution cavity, form and plan to build the only thick liquid wall in the underground continuous wall outside, effectively prevent that the condition in thick liquid runs off or the hole of collapsing from appearing in the underground continuous wall grooving in-process, and improve underground continuous wall's construction quality.
Further, when the closed space exceeds 300 cubic meters, snap pile insertion holes are vertically formed in the surface of the foundation at the inner side of the proposed underground continuous wall penetrating through the karst cave, and corresponding snap piles are inserted into the snap pile insertion holes.
The beneficial effect of adopting above-mentioned further scheme is that, because the cavern is too big, through setting up the secant pile simultaneously in the inside and outside of proposing to build underground continuous wall, form two grout stop wall structures, can effectively reduce the grout volume, save the cost greatly.
Furthermore, both ends of the occlusive pile penetrate through the karst cave edge in the horizontal direction, and the length of the part of both ends of the occlusive pile, which exceeds the karst cave edge, in the horizontal direction is more than 5 m; the distance between the center line of the secant pile row pile and the outer edge of the proposed underground continuous wall is 1 m.
The beneficial effect who adopts above-mentioned further scheme is through setting the length that exceeds the solution hole part with the secant pile in the horizontal direction to be greater than 5m, can guarantee that the condition that the thick liquid runs off can not appear in the continuous wall grooving in-process.
Further, the bite pile passes through the bottom of the cavern in the vertical direction, and the length of the bite pile exceeding the bottom part of the cavern is more than 500 mm.
Adopt above-mentioned further scheme's beneficial effect to be through setting the length that exceeds the interlock stake bottom part to be greater than 500mm, can further guarantee that the condition that the thick liquid runs off can not appear in the continuous wall grooving in-process.
Further, the pile diameter of the occlusive pile is 1000mm, and the distance between pile cores is 800 mm.
The pile diameter of the secant pile is 1000mm, the distance between pile cores is 800mm, the secant pile can be guaranteed to have enough strength, and the situation of pile breakage is avoided.
Further, the occlusive pile is a concrete occlusive pile.
The concrete occlusive pile has the beneficial effects that the cost is relatively low and the construction is easy by selecting the concrete occlusive pile.
Furthermore, guide walls are arranged on the surface of the foundation on the periphery of the insertion holes of the occlusive piles; and the guide wall is vertically provided with a positioning hole corresponding to the jack of the occlusive pile.
The beneficial effect who adopts above-mentioned further scheme is that, through setting up the guide wall, can effectively improve the positioning accuracy of secant pile construction.
Furthermore, the diameter of the positioning hole in the guide wall is 10-20 mm larger than the pile diameter of the occlusion pile.
The beneficial effect who adopts above-mentioned further scheme is through setting up the locating hole diameter on the guide wall to be slightly bigger than the stake footpath of secant pile, can make the preformed gap during secant pile construction, avoids disconnected stake.
Further, the height of the guide wall is 60-80 mm.
The beneficial effect of adopting above-mentioned further scheme is that, the height of leading the wall is 60 ~ 80mm, can guarantee to lead the wall locating hole and give the sufficient direction length of secant pile, guarantees the straightness that hangs down of secant pile.
Furthermore, the guide wall is a concrete guide wall or a reinforced concrete guide wall.
The concrete guide wall or the reinforced concrete guide wall has the advantages of relatively low cost and easiness in construction.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic sectional structure view of the secant pile grout stopping wall structure of the water-rich karst development geology of the utility model;
fig. 2 is a schematic plan view of the double grout stop wall structure of the present invention;
fig. 3 is a schematic plane position diagram of the secant pile grout stopping wall structure of the water-rich karst development geology of the utility model;
fig. 4 is a schematic plan view of the guide wall according to the present invention.
In the figure: 10. a foundation; 20. karst cave; 30. drawing up an underground continuous wall; 40. an occlusive pile; 50. a guide wall; 51. positioning holes; D. the diameter of the positioning hole on the guide wall; d. the pile diameter of the occlusive pile; l, the distance between the pile line of the occlusive pile row and the outer edge of the proposed underground continuous wall.
Detailed Description
Referring to fig. 1 to 4, the secant pile grout stop wall structure for water-rich karst development geology of the embodiment includes a foundation 10, at least one karst cave 20 is formed below the foundation 10, and at least one part of a proposed underground continuous wall 30 penetrates through the karst cave 20; the surface of the foundation 10 is vertically provided with secant pile insertion holes at the outer side positions of the proposed underground continuous wall 30 penetrating through the corresponding karst caves 20, corresponding secant piles 40 are inserted into the secant pile insertion holes, and the secant piles 40 and the karst caves 20 at the inner side of the corresponding proposed underground continuous wall 30 form a closed space;
specifically, referring to fig. 2, when the enclosed space exceeds 300 cubic meters, snap pile insertion holes are vertically formed in the surface of the foundation 10 at the inner side of the proposed underground continuous wall 30 penetrating through the karst cave 20, corresponding snap piles 40 are inserted into the snap pile insertion holes, and then the snap piles 40 at the two sides of the proposed underground continuous wall 30 form a double grout stop wall structure;
specifically, both ends of the occlusive pile 40 in the horizontal direction penetrate through the edge of the karst cave 20, and the length of the portions of both ends of the occlusive pile 40 exceeding the edge of the karst cave 20 in the horizontal direction is greater than 5m, preferably 6m in the embodiment; referring to fig. 3, the distance L between the center line of the row of the occlusive piles 40 and the outer edge of the proposed underground continuous wall 30 is 1 m;
specifically, the bite pile 40 penetrates through the bottom of the cavern 20 in the vertical direction, and the length of the bite pile 40 exceeding the bottom of the cavern 20 is more than 500mm, and the length of the bite pile 40 exceeding the bottom of the cavern 20 is preferably 600mm in the embodiment;
specifically, the pile diameter of the occlusive pile 40 is 1000mm, and the pile core interval is 800 mm;
specifically, the occlusive pile 40 is a concrete occlusive pile;
specifically, referring to fig. 4, the surface of the foundation 10 is provided with a guide wall 50 around the circumference of the insertion hole of the occlusive pile; the guide wall 50 is vertically provided with a positioning hole 51 corresponding to the jack of the occlusive pile;
specifically, the diameter D of the positioning hole on the guide wall 50 is 10-20 mm larger than the pile diameter D of the occlusive pile, and preferably 15mm in the embodiment;
specifically, the height of the guide wall 50 is 60-80 mm, and the preferred height of the guide wall is 70mm in the embodiment;
specifically, the guide wall 50 is a concrete guide wall 50 or a reinforced concrete guide wall 50.
The construction flow of the embodiment is as follows:
according to the distribution range and the depth of the karst caves, carrying out plain concrete secant pile construction on the outer side of the underground continuous wall to be built through a full-casing full-rotary drilling machine to form a grout stopping wall; the concrete construction process of the all-casing all-slewing drilling machine to form the plain concrete secant pile comprises the following steps: aligning a full-rotation full-casing drilling machine; flushing, grabbing, soil taking and pipe pressing; thirdly, carrying out rock embedding, soil taking and pipe pressing on the rotary drilling rig; measuring verticality, depth of hole and sediment; fifthly, placing a guide pipe and pouring concrete; sixthly, pipe drawing and pile driving are carried out by moving the pile driver.
Compared with the prior art, rich water karst development geology's interlock stake only thick liquid wall structure, through setting up the interlock stake to form the enclosure space with corresponding the solution cavity, form the only thick liquid wall in the underground continuous wall outside of proposing to build, effectively prevent that the underground continuous wall grooving in-process from appearing the thick liquid and running off or the condition of collapsing the hole, and improve underground continuous wall's construction quality.
In addition, due to the fact that the size of the karst cave is too large, the occlusive piles are arranged on the inner side and the outer side of the proposed underground diaphragm wall simultaneously, a double grout stop wall structure is formed, grouting amount can be effectively reduced, and cost is greatly saved.
The length of the part of the occlusive pile exceeding the karst cave in the horizontal direction is set to be larger than 5m, and the length of the part of the occlusive pile exceeding the bottom of the karst cave is set to be larger than 500mm, so that the condition that slurry runs off in the grooving process of the continuous wall can be ensured.
The pile diameter of the secant pile is 1000mm, the pile core interval is 800mm, the secant pile can be ensured to have enough strength, and the pile breaking condition is avoided; the height of the guide wall is 60-80 mm, so that the guide wall positioning holes can be guaranteed to give enough guide length to the secant pile, and the verticality of the secant pile is guaranteed.
By selecting the concrete occlusive pile, the cost is relatively low, and the construction is easy.
Through setting up the guide wall, can effectively improve the positioning accuracy of secant pile construction.
The diameter of the positioning hole in the guide wall is slightly larger than the pile diameter of the secant pile, so that a clearance can be reserved during construction of the secant pile, and pile breakage is avoided.
The concrete guide wall or the reinforced concrete guide wall is selected, so that the cost is relatively low, and the construction is easy.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The secant pile grout stop wall structure of the water-rich karst development geology is characterized by comprising a foundation, wherein at least one karst cave is arranged below the foundation, and at least one part of the proposed underground continuous wall penetrates through the karst cave; and occlusion pile insertion holes are vertically formed in the outer side of the foundation surface, penetrating through the proposed underground continuous wall corresponding to the karst cave, corresponding occlusion piles are inserted into the occlusion pile insertion holes, and the occlusion piles and the karst cave corresponding to the inner side of the proposed underground continuous wall form a closed space.
2. The secant pile grout stop wall structure of water-rich karst development geology according to claim 1, characterized in that when the closed space exceeds 300 cubic meters, the surface of the foundation is vertically provided with secant pile insertion holes at the inner side positions of the proposed underground continuous wall penetrating through the karst cave, and corresponding secant piles are inserted into the secant pile insertion holes.
3. The secant pile grout stopping wall structure of the water-rich karst development geology according to the claim 2, characterized in that both ends of the secant pile pass through the karst cave edge in the horizontal direction, and the length of the section of both ends of the secant pile exceeding the karst cave edge in the horizontal direction is more than 5 m; the distance between the center line of the secant pile row pile and the outer edge of the proposed underground continuous wall is 1 m.
4. A spud-pile grout-stopping wall construction of water-rich karst developmental geology according to claim 3, characterized in that the spud-pile is passed through the bottom of the cavern in the vertical direction and the length of the spud-pile beyond the bottom part of the cavern is more than 500 mm.
5. The secant pile grout stop wall structure of the water-rich karst development geology according to claim 4, characterized in that the secant pile has a pile diameter of 1000mm and a pile core spacing of 800 mm.
6. The secant pile grout stopping wall structure of the water-rich karst development geology according to claim 5, characterized in that the secant pile is a concrete secant pile.
7. The secant pile grout stop wall structure of the water-rich karst development geology according to claim 6, characterized in that a guide wall is arranged on the surface of the foundation on the periphery of the jack of the secant pile; and the guide wall is vertically provided with a positioning hole corresponding to the jack of the occlusive pile.
8. The secant pile grout stopping wall structure of the water-rich karst development geology according to claim 7, wherein the diameter of the positioning hole on the guide wall is 10-20 mm larger than the pile diameter of the secant pile.
9. The secant pile grout stop wall structure for the water-rich karst development geology according to claim 8, wherein the height of the guide wall is 60-80 mm.
10. The bite-block grout stop wall structure for water-rich karst development geology according to claim 9, characterized in that the guide wall is a concrete guide wall or a reinforced concrete guide wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922371737.5U CN211446886U (en) | 2019-12-24 | 2019-12-24 | Secant pile grout stopping wall structure for water-rich karst development geology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922371737.5U CN211446886U (en) | 2019-12-24 | 2019-12-24 | Secant pile grout stopping wall structure for water-rich karst development geology |
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| CN211446886U true CN211446886U (en) | 2020-09-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904951A (en) * | 2019-12-24 | 2020-03-24 | 广州市住宅建设发展有限公司 | Construction method of underground continuous wall of water-rich karst development geology and grout stop wall structure |
| WO2022268976A1 (en) * | 2021-06-23 | 2022-12-29 | Hemet Adrien | Lost formwork for a guide wall for erecting a bulkhead made of piles |
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2019
- 2019-12-24 CN CN201922371737.5U patent/CN211446886U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904951A (en) * | 2019-12-24 | 2020-03-24 | 广州市住宅建设发展有限公司 | Construction method of underground continuous wall of water-rich karst development geology and grout stop wall structure |
| WO2022268976A1 (en) * | 2021-06-23 | 2022-12-29 | Hemet Adrien | Lost formwork for a guide wall for erecting a bulkhead made of piles |
| FR3124529A1 (en) * | 2021-06-23 | 2022-12-30 | Adrien HEMET | Lost formwork for guide walls for the construction of a pile wall |
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