CN214738189U - Bucket waterproof curtain and hole digging pile supporting structure of water-rich sand layer - Google Patents

Bucket waterproof curtain and hole digging pile supporting structure of water-rich sand layer Download PDF

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Publication number
CN214738189U
CN214738189U CN202120087804.5U CN202120087804U CN214738189U CN 214738189 U CN214738189 U CN 214738189U CN 202120087804 U CN202120087804 U CN 202120087804U CN 214738189 U CN214738189 U CN 214738189U
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pile
water
grouting
piles
jet grouting
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陈顺平
刘智春
李文浩
王希
杨翔
刘桂林
刘诗文
郗宏庆
李东锋
喻强
陈丹阳
卫营军
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China Railway Siyuan Survey and Design Group Co Ltd
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China Railway Siyuan Survey and Design Group Co Ltd
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Abstract

The utility model relates to the technical field of bridge engineering and deep foundation pit protection engineering, and provides a bucket waterproof curtain of a water-rich sand layer, which comprises a plurality of jet grouting piles arranged in an annular shape and a plurality of first grouting holes formed in an underground drilling hole, wherein the adjacent jet grouting piles are arranged in an occluded manner, and the area formed by enclosing each jet grouting pile is an area for arranging digging piles; each first grouting hole is located in the arrangement range of the dug pile. Still provide a bored pile bearing structure, including the bored pile, still include foretell cask stagnant water curtain in rich water sand layer, the bored pile is located each the jet grouting pile encloses the region that closes and form. The utility model discloses an interlock of high pressure jet grouting pile and the slip casting in first slip casting hole have constituted cask formula stagnant water curtain, have solved and have dug the hole bored concrete pile in the past and have constructed the degree of difficulty greatly, pore-forming difficulty, the construction safety high risk scheduling problem at the higher, abundant sand soil layer of moisture of ground water level.

Description

Bucket waterproof curtain and hole digging pile supporting structure of water-rich sand layer
Technical Field
The utility model relates to a bridge engineering, deep basal pit protection engineering technical field specifically are a cask stagnant water curtain and a bored pile bearing structure of rich water sand soil layer.
Background
Along with the development of traffic and cities, more and more roads and municipal roads are crossed with railways, the underpass railway roadbed sections of the roads and the municipal roads are usually constructed by jacking frame bridges, the existing railway lines need to be reinforced in an overhead manner before jacking construction operation, and all supporting points in the middle of an overhead system need to be supported by pile foundations; in addition, pile foundations are generally adopted to support, excavate and protect the edge supporting structures of the existing railway lines or buildings of various projects. When the existing railway line is reinforced, because the supporting pile of the overhead system is close to the edge of the existing railway line, the construction condition of the drilled pile is not provided, and the construction is carried out by adopting a manual hole digging pile; in addition, when various engineering deep basal pit edges are close to the existing buildings, the construction space conditions of the bored pile are not met, and the construction of the deep basal pit edge protection pile needs to be carried out by adopting the manual bored pile. The hole digging filling pile uses a soil layer without underground water or with a deeper underground water level; when the engineering geological condition is a sandy soil stratum, the construction is influenced by higher underground water level and richer underground water, the construction implementation difficulty of the manual hole digging pile is high, the hole forming is difficult, the construction risk is high, and engineering measures are required to be taken for pretreatment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cask stagnant water curtain and digging hole stake bearing structure of rich water sand soil layer can solve partial defect among the prior art at least.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: a bucket waterproof curtain of a water-rich sandy soil layer comprises a plurality of jet grouting piles annularly arranged and a plurality of first grouting holes formed in underground drilling holes, wherein adjacent jet grouting piles are arranged in an occluded mode, and the area formed by enclosing of the jet grouting piles is an area for arranging the digging piles; each first grouting hole is located in the arrangement range of the dug pile.
Furthermore, the number of the jet grouting piles is 24, the distance between every two adjacent jet grouting piles is 30cm, and the diameter of an annular hole formed by each jet grouting pile is 0.24 m.
Further, the pile diameter of each jet grouting pile is 450 mm.
Furthermore, there are four first grouting holes, and the four first grouting holes are arranged in a square shape.
Further, the distance between two adjacent first grouting holes is 0.8 m.
Further, a water sealing and water isolating bottom layer is formed at the bottom of each first grouting hole.
Furthermore, a second grouting hole is formed outside each jet grouting pile in the underground drilling mode.
The embodiment of the utility model provides another kind of technical scheme: a dug pile supporting structure comprises dug piles and the bucket waterproof curtain of the water-rich sand layer, wherein the dug piles are located in an area formed by surrounding the rotary spraying piles.
Further, the length of each jet grouting pile is not smaller than that of the hole digging pile.
Compared with the prior art, the beneficial effects of the utility model are that: through the occlusion of the high-pressure jet grouting pile and the grouting of the first grouting hole, the bucket type waterproof curtain is formed, the problems that the construction difficulty of a hole digging filling pile in a sand layer with higher underground water level and rich water content is large, the hole forming is difficult, the construction safety risk is high and the like in the prior art are solved, and the effects of simple construction, safety and reliability and low construction safety risk are achieved. The construction condition requirement is low, the height of construction machinery equipment is small, the water stopping and soft soil layer strengthening effects are good, the application is flexible, and only one-time pile forming is needed. The construction method has the advantages that existing railway engineering is penetrated under large roads and municipal engineering, the times of reversing the reinforcing temporary beam or the longitudinal and transverse lifting beam of the line can be reduced, the arrangement of temporary supporting piles is omitted, the construction period is shortened, the slow-moving operation period of the railway is shortened, and the influence on the business of the existing railway is reduced.
Drawings
Fig. 1 is a plan layout view of a bucket waterproof curtain of a water-rich sand layer according to an embodiment of the present invention;
fig. 2 is a vertical layout view of a bucket waterproof curtain of a water-rich sand layer provided by the embodiment of the utility model;
in the reference symbols: 1-jet grouting pile; 2-a first grouting hole; 3-sealing the water and water-proof bottom layer; 4-pillow block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a bucket waterproof curtain for a water-rich sandy soil layer, including a plurality of jet grouting piles 1 annularly arranged and a plurality of first grouting holes 2 formed in an underground drill hole, wherein adjacent jet grouting piles 1 are arranged in an occluded manner, and an area formed by enclosing each jet grouting pile 1 is an area for placing a digging pile; each of the first grouting holes 2 is located within a range in which a bored pile is installed. In this embodiment, through the interlock of high pressure jet grouting pile 1 and the slip casting of first slip casting hole 2, constituted cask formula stagnant water curtain, solved and dug the hole bored concrete pile in the past and construct the degree of difficulty greatly, the pore-forming difficulty is big in the sand layer that ground water level is higher, moisture is abundant, construction safety risk height scheduling problem, gained the effect that the construction is simple, safe and reliable, construction safety risk is low. Specifically, firstly, a circle of circularly arranged rotary spraying piles 1 are driven along the outer side of the dug pile to be constructed, the adjacent rotary spraying piles 1 are mutually occluded, first grouting holes 2 are processed in the plane range of the dug pile to be constructed, a bucket type waterproof curtain is formed, so that grouting is performed through the first grouting holes 2, a water sealing and water isolating bottom layer 3 is formed at the bottom, and double-slurry bottom sealing is adopted. So adopt the high-pressure jet grouting pile 1 of two liquid thick liquids back cover cooperation interlock at the pile foundation of digging a hole can play fine stagnant water effect. Preferably, taking a bored pile with a diameter of 1.5m as an example, the number of the jet grouting piles 1 is 24, the distance between two adjacent jet grouting piles 1 is 30cm, and the aperture of the ring formed by each jet grouting pile 1 is 0.24 m. And the pile diameter of each jet grouting pile 1 is 450 mm.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 and fig. 2, there are four first grouting holes 2, and the four first grouting holes 2 are arranged in a square shape. In the present embodiment, the number of the first grouting holes 2 is preferably four, and four first grouting holes 2 are arranged in a square shape, and each first grouting hole has a side length of 0.8 m. Of course, the number of the first grouting holes 2 may be selected according to actual conditions. The first orifice 2 is defined herein to distinguish it from the second orifice below, except that the first and second orifices have no other limiting meaning.
As the embodiment of the utility model provides an optimization scheme, each spout stake 1 outside underground drilling hole forms the second slip casting hole soon. In the embodiment, grouting holes can be arranged on the outer side of the occlusal surface of the high-pressure jet grouting pile 1 according to actual conditions, so that water leakage at places with lower sealing strength due to improper occlusion is prevented, and the grout is ensured to be effectively injected into the stratum.
An embodiment of the utility model provides a bored pile bearing structure, cask stagnant water curtain including bored pile and foretell rich water sand soil layer, bored pile is located each spout stake 1 soon and enclose in closing the region of formation. In this embodiment, the bucket waterproof curtain of the above-mentioned rich water sand layer has been adopted to bored pile bearing structure, through the interlock of high pressure jet grouting pile 1 and the slip casting of first slip casting hole 2, has constituted bucket formula waterproof curtain, has solved and has dug the hole bored pile in the past and higher, the abundant sand layer construction degree of difficulty of moisture is big, the pore-forming difficulty, construction safety risk height scheduling problem, has obtained the effect that the construction is simple, safe and reliable, construction safety risk is low. Specifically, carry out earlier along the outside of the dug pile of treating the construction and beat the rotatory jet grouting pile 1 that the circle annular was arranged, and make adjacent the mutual interlock of rotatory jet grouting pile 1 to carry out first injected hole 2 at the planar range of the dug pile of treating the construction and handle, form cask formula stagnant water curtain, so that through these first injected hole 2 slip casting, form water seal water proof bottom 3 in the bottom, adopt the high pressure of two liquid thick liquids back cover cooperation interlock at the dug pile foundation 1 so can play fine stagnant water effect. Preferably, the number of the jet grouting piles 1 is 24, the distance between two adjacent jet grouting piles 1 is 30cm, and the aperture of the ring formed by each jet grouting pile 1 is 0.24 m. And the pile diameter of each jet grouting pile 1 is 450 mm. The support structure for the expanded excavation pile can be used for the situation that the support pile of the overhead system is close to the edge of an existing railway line, a drilled pile construction condition is not met, and a manual excavation pile is required to be adopted for construction, and is also suitable for the situation that deep foundation pits are excavated in various projects and pile foundations are required to be adopted for supporting excavation protection.
As the embodiment of the utility model provides an optimization scheme, each the length of jet grouting pile 1 is all not less than the length of digging pile.
The embodiment of the utility model provides a bored pile supports construction technology, including following step: s1, erecting a small-span temporary beam or a longitudinal and transverse lifting beam, and temporarily reinforcing the existing railway line (the point is supported by a sleeper pillar 4 or a concrete block and is placed on the shoulder of the existing railway); s2, downwards excavating the existing railway subgrade to 3-5 m below the shoulder; s3, driving a circle of circularly arranged rotary spraying piles 1 along the outer side of the dug pile to be constructed, and enabling the adjacent rotary spraying piles 1 to be meshed with each other; performing first grouting hole 2 treatment in the plane range of the dug pile to be constructed to form a bucket type waterproof curtain; s4, constructing the dug pile to the top and bottom elevations required by the design; s5, completing a longitudinal and transverse lifting beam overhead system of the jacking frame bridge according to design requirements; and S6, jacking the frame bridge, backfilling the roadbed at two sides, and dismantling the longitudinal and transverse lifting beam overhead system. And the drilling machine is closely observed to overflow the water outlet condition, if a large amount of overflow occurs, the drilling machine is stopped immediately, and the construction can be continued after the practical reasons are analyzed and clarified.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a cask stagnant water curtain in rich water sand layer which characterized in that: the grouting pile comprises a plurality of jet grouting piles which are annularly arranged and a plurality of first grouting holes which are formed by drilling holes into the ground, wherein adjacent jet grouting piles are arranged in an occlusion manner, and the area formed by enclosing of the jet grouting piles is an area for arranging the hole digging piles; each first grouting hole is located in the arrangement range of the dug pile.
2. The bucket waterproof curtain of the water-rich sandy soil layer as claimed in claim 1, wherein: the jet grouting pile comprises 24 jet grouting piles, the distance between every two adjacent jet grouting piles is 30cm, and the diameter of an annular hole formed by each jet grouting pile is 0.24 m.
3. The bucket waterproof curtain of the water-rich sandy soil layer as claimed in claim 1, wherein: the pile diameter of each jet grouting pile is 450 mm.
4. The bucket waterproof curtain of the water-rich sandy soil layer as claimed in claim 1, wherein: the number of the first grouting holes is four, and the four first grouting holes are arranged in a square shape.
5. The bucket waterproof curtain of the water-rich sandy soil layer as claimed in claim 4, wherein: the distance between two adjacent first grouting holes is 0.8 m.
6. The bucket waterproof curtain of the water-rich sandy soil layer as claimed in claim 1, wherein: and a water sealing and water isolating bottom layer is formed at the bottom of each first grouting hole.
7. The bucket waterproof curtain of the water-rich sandy soil layer as claimed in claim 1, wherein: and drilling outside the jet grouting piles to the underground to form second grouting holes.
8. The utility model provides a bored pile bearing structure, includes bored pile, its characterized in that: the bucket waterproof curtain of the water-rich sandy soil layer is further included according to any one of claims 1 to 7, and the hole digging piles are located in the area formed by the surrounding of the rotary spraying piles.
9. A bored pile support structure according to claim 8, wherein: the length of each jet grouting pile is not less than that of the hole digging pile.
CN202120087804.5U 2021-01-13 2021-01-13 Bucket waterproof curtain and hole digging pile supporting structure of water-rich sand layer Active CN214738189U (en)

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CN202120087804.5U CN214738189U (en) 2021-01-13 2021-01-13 Bucket waterproof curtain and hole digging pile supporting structure of water-rich sand layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120087804.5U CN214738189U (en) 2021-01-13 2021-01-13 Bucket waterproof curtain and hole digging pile supporting structure of water-rich sand layer

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CN214738189U true CN214738189U (en) 2021-11-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112761175A (en) * 2021-01-13 2021-05-07 中铁第四勘察设计院集团有限公司 Bucket waterproof curtain and hole digging pile supporting structure for water-rich sand layer and construction process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112761175A (en) * 2021-01-13 2021-05-07 中铁第四勘察设计院集团有限公司 Bucket waterproof curtain and hole digging pile supporting structure for water-rich sand layer and construction process

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