CN114508113A - Construction method of waist support type anti-slide pile structure - Google Patents

Construction method of waist support type anti-slide pile structure Download PDF

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Publication number
CN114508113A
CN114508113A CN202210086710.5A CN202210086710A CN114508113A CN 114508113 A CN114508113 A CN 114508113A CN 202210086710 A CN202210086710 A CN 202210086710A CN 114508113 A CN114508113 A CN 114508113A
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China
Prior art keywords
pile
supporting
vertical
plate
plates
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CN202210086710.5A
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Chinese (zh)
Inventor
肖世国
齐远
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Southwest Jiaotong University
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Southwest Jiaotong University
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Priority to CN202210086710.5A priority Critical patent/CN114508113A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0258—Retaining or protecting walls characterised by constructional features
    • E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
    • 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
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • 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
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • 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
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0007—Production methods using a mold
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0004—Synthetics
    • E02D2300/0018—Cement used as binder
    • E02D2300/002—Concrete
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0071—Wood

Abstract

The invention provides a construction method of a waist support type slide-resistant pile structure, which comprises the following steps: (1) excavating pile holes in rock-soil bodies behind the piles to be supported to a designed position at intervals, and installing vertical piles for supporting the rock-soil bodies behind the piles in the pile holes; (2) excavating a sliding body in front of the vertical piles to a stable stratum in front of the piles, and erecting a soil retaining structure between adjacent vertical piles; (3) when a sliding body before the vertical pile is excavated and reaches a stable stratum before the pile, a plurality of supporting structures are arranged on the stable stratum before the pile at intervals, each supporting structure is connected with each vertical pile in a one-to-one correspondence mode, then a backfill body covers the supporting structures to the designed height on the stable stratum before the pile, and the backfill soil layer is compacted. The invention adopts a step-by-step construction method, has reasonable working procedures, simple construction process and strong operability, and can complete large landslide treatment, high slope reinforcement or deep foundation pit support within a relatively short construction period. Therefore, the structure has strong practical engineering applicability.

Description

Construction method of waist support type anti-slide pile structure
Technical Field
The invention relates to the technical field of civil engineering, in particular to a construction method of a waist support type slide-resistant pile structure.
Background
In the side slope retaining engineering, the slide-resistant pile has the obvious advantages of high structural rigidity, good stability, small settlement deformation, strong shock resistance, convenient construction, adaptability to various complex geological conditions and the like, and is a commonly used retaining structure at present. The main working principle is that the anchoring force of the anchoring section of the anti-slide pile inserted below the sliding surface balances the landslide thrust of the loaded section above the sliding surface, and meanwhile, for the excavation slope, a soil retaining plate is arranged between the piles to prevent soil from being extruded out laterally, so that the stability of the slope is further enhanced.
In actual engineering, the single anti-slide pile mainly comprises two construction modes of prefabrication and cast-in-place, a straight pile form is usually adopted in consideration of the field construction difficulty, and when landslide thrust is relatively large, the design and calculation requirements can be met only by measures of increasing the sectional area of a pile body, increasing the reinforcement quantity or arranging a pre-stressed anchor cable and the like. The increase of the cross section area of the pile body and the increase of the reinforcement quantity can improve the landslide control cost, increase the engineering quantity and cause great investment on manpower, material resources, financial resources and the like; the anchor pile formed by adding the prestressed anchor cable not only has large construction difficulty, complex process and higher cost, but also can generate stress relaxation effect along with time, and has weakening influence on the long-term stability of the slope body.
Disclosure of Invention
The invention mainly aims to provide a waist support type anti-slide pile structure to solve the problems of high landslide control cost and large engineering quantity in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a lumbar support type slide pile structure, including:
the post-pile structure comprises a plurality of vertical piles which are arranged at intervals and used for supporting rock-soil bodies behind the piles, and a soil retaining structure arranged between every two adjacent vertical piles;
the pile front structure comprises a plurality of supporting structures which are correspondingly connected with each vertical pile and are arranged in a stable stratum in front of the pile.
Further, the support structure comprises support beams/plates.
Further, the support beams/plates are used to stabilize the horizontal layout inside the formation before the piles.
Further, the support structure further comprises a stop/plate connected to the end of the support beam/plate.
Further, the ends of the support beam/plate are connected to the upper or middle of the stop/plate.
Further, the support beams/plates are arranged obliquely to fit the upper surface of the inclined ground layer before the piles.
Further, the support structure also includes an anchor block connected to the ends of the support beams/plates.
Further, the vertical piles and the supporting structure are of a reinforced concrete structure or a steel structure, and the soil retaining structure is of one of a reinforced concrete structure, a steel structure and a wood structure.
Furthermore, the vertical pile comprises an embedded section and a loaded section, wherein the embedded section is used for being supported in a stable stratum of the slope body, the loaded section is used for being supported on the front side of the sliding body, and the supporting structure is connected with the front side of the loaded section respectively.
Further, the support structure is connected with the middle upper part of the vertical pile.
According to another aspect of the invention, a construction method of a lumbar support type slide-resistant pile structure is provided,
the method comprises the following steps:
(1) excavating pile holes at intervals in the rock-soil mass behind the pile to be supported to a designed position, and installing vertical piles for supporting the rock-soil mass behind the pile in the pile holes;
(2) excavating a sliding body in front of the vertical piles to a stable stratum in front of the piles, and erecting a soil retaining structure between adjacent vertical piles;
(3) when a sliding body before the vertical pile is excavated and reaches a stable stratum before the pile, a plurality of supporting structures are arranged on the stable stratum before the pile at intervals, each supporting structure is connected with each vertical pile in a one-to-one correspondence mode, then a backfill body covers the supporting structures to the designed height on the stable stratum before the pile, and the backfill soil layer is compacted.
Further, the vertical piles and the supporting structures are all of reinforced concrete structures, and the construction method specifically comprises the following steps:
(1) excavating pile holes in the rock-soil mass behind the pile to be supported at intervals to a designed position, mounting a vertical pile reinforcement cage in the excavated pile holes, reserving reserved steel plates for connecting with the support structure reinforcement cage at the side parts of the vertical pile reinforcement cage, and performing concrete pouring on the vertical pile reinforcement cage;
(2) after the concrete of the vertical pile reaches the maintenance age, excavating a pile body front sideslip body to a stable stratum, and carrying out erection and installation of a retaining structure;
(3) when a sliding body before a vertical pile is excavated to a stable stratum before the pile, a plurality of supporting structure steel reinforcement cages are arranged on the stable stratum before the pile at intervals, concrete of reserved steel plates on the side faces of the vertical pile is broken at the connecting position of the vertical pile and the supporting structure so as to leak local steel bars and the reserved steel bars, the reserved steel plates are connected with the supporting structure steel reinforcement cages, a template of the supporting structure is erected, concrete is poured on the supporting structure steel reinforcement cages, the template is detached after the maintenance age is reached, then backfill bodies cover the supporting structure to the designed height on the stable stratum before the pile, and a backfill soil layer is compacted.
Further, the support structure comprises support beams/plates.
Furthermore, the supporting structure also comprises a stop block/plate connected with the end part of the supporting beam/plate, the step (3) comprises the steps of arranging a plurality of supporting beam/plate reinforcement cages and corresponding stop block/plate reinforcement cages on the front stable stratum at horizontal intervals when a sliding body in front of the vertical pile is horizontally excavated to the front stable stratum of the pile, integrally binding and fixing the end parts of the supporting beam/plate reinforcement cages and the stop block/plate reinforcement cages, breaking concrete reserved on the side surfaces of the vertical pile at the connecting position of the vertical pile and the supporting beam/plate reinforcement cages to leak the reserved steel plates, connecting the reserved steel plates with the supporting beam/plate reinforcement cages by welding, erecting templates of the supporting beam/plate reinforcement cages and the stop block/plate reinforcement cages, and pouring the supporting beam/plate reinforcement cages and the stop block/plate reinforcement cages, and removing the template after the maintenance age is reached, backfilling a support beam/plate and a stop block/plate to the designed height on the stable stratum in front of the pile, and compacting the backfilled soil layer, wherein the end part of the support beam/plate is connected with the upper end or the middle part of the stop block/plate.
Furthermore, the supporting structure also comprises an anchor block connected with the end part of the supporting beam/plate, the step (3) comprises the steps of obliquely excavating a sliding body in front of the vertical pile to a stable stratum in front of the pile, arranging a plurality of supporting beam/plate steel reinforcement cages and corresponding anchor block steel reinforcement cages at intervals in an inclined mode in the stable stratum in front of the pile, integrally binding and fixing the end parts of the supporting beam/plate steel reinforcement cages and the anchor block steel reinforcement cages, breaking concrete reserved on the side surfaces of the vertical pile at the connecting position of the vertical pile and the supporting beam/plate steel reinforcement cages to leak the reserved steel plates, connecting the reserved steel plates and the supporting beam/plate steel reinforcement cages by welding, erecting templates of the supporting beam/plate steel reinforcement cages and the anchor block steel reinforcement cages, carrying out concrete pouring on the supporting beam/plate steel reinforcement cages and the anchor block steel reinforcement cages, removing the templates after the maintenance period is reached, and then backfilling soil on the stable stratum in front of the pile to cover the anchor block to the design height, and compacting the backfill soil layer. Because the inclined beam/plate has a certain gradient, the scheme can be considered to adopt quick-setting concrete pouring during construction.
Further, the vertical piles and the supporting structures are all steel structures, and the construction method specifically comprises the following steps:
(1) vertical piles are driven into a soil body structure behind the pile to be supported at intervals to a designed position;
(2) excavating a lateral sliding body in front of the pile body to a stable stratum, and erecting and installing a soil retaining structure;
(3) when a sliding body before a vertical pile is excavated to a stable stratum before the pile, according to a design position, supporting structures are arranged on the stable stratum before the pile at intervals, the vertical pile and the supporting structures are welded at the connecting position of the vertical pile and the supporting structures, then a backfill body covers the supporting structures to a design height on the stable stratum before the pile, and the backfill soil layer is compacted.
Further, the support structure comprises support beams/plates.
Further, the supporting structure also comprises a stop block/plate connected with the end part of the supporting beam/plate, the step (3) comprises the steps of arranging a plurality of supporting beams/plates and corresponding stop blocks/plates on the stable stratum in front of the pile at intervals horizontally when a sliding body in front of the vertical pile is excavated horizontally to the stable stratum in front of the pile, welding the supporting beams/plates with one side of the vertical pile, welding the end part of the supporting beams/plates with the stop blocks/plates, then covering the supporting beams/plates and the stop blocks/plates with backfill soil on the stable stratum in front of the pile to a designed height, and compacting the backfill soil layer, wherein the end part of the supporting beams/plates is connected with the upper end or the middle part of the stop blocks/plates.
Further, the supporting structure further comprises anchor blocks connected with the end portions of the supporting beams/plates, the step (3) comprises the steps of obliquely arranging a plurality of supporting beams/plates and corresponding anchor blocks at intervals on the stable stratum in front of the pile when a sliding body in front of the vertical pile is obliquely excavated to the stable stratum in front of the pile, welding the supporting beams/plates with one side of the vertical pile, welding the end portions of the supporting beams/plates with the anchor blocks, then covering the anchor blocks with backfill bodies on the stable stratum in front of the pile to a designed height, and compacting the backfill soil layer.
Furthermore, the post-pile rock-soil body comprises a sliding body and a slope body stable stratum, the vertical pile comprises an embedded section and a loaded section, the embedded section is used for supporting and locating in the slope body stable stratum of the post-pile rock-soil body, the loaded section is used for supporting and locating on the front side of the sliding body of the post-pile rock-soil body, and the supporting structures are connected with the front side of the loaded section respectively.
Compared with the prior art, the invention has the advantages that: the supporting structure is arranged in the stable stratum before the pile at intervals, the stable stratum generates end resistance before the pile, side friction resistance is generated on the side face of the supporting structure, the resistance is used for providing pile front resistance for the vertical pile through the fixed nodes, pile body stress is reduced, and the overall stability of the anti-slide pile structure can be effectively improved. The stress of the steel plate is more reasonable, the economy is good, and the steel plate has higher integral stability, stronger engineering applicability and construction operability. Because the stress of the pile body structure is improved, the pile diameter can be reduced to a certain extent, the reinforcement amount is reduced, a better slope body treatment effect is achieved on the basis of reducing the engineering cost, and the method has good economic benefits.
The invention can be applied to different projects such as natural landslide control, project high slope reinforcement, deep foundation pit support and the like, wherein the support beam and the stop block can properly enlarge the section to form a plate, provide larger side friction resistance and end resistance, can be used for the situation of larger landslide thrust and has stronger project applicability.
The construction method has reasonable procedures, simple construction process and strong operability, can finish large landslide control, high slope reinforcement or deep foundation pit support in a relatively short construction period, and has strong practical engineering applicability.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:
fig. 1 is a perspective view of an embodiment 1 of the lumbar support type slide pile structure according to the present invention.
Fig. 2 is a sectional view of an embodiment 1 of the lumbar support type slide pile structure according to the present invention.
Fig. 3 is a top view of an embodiment 1 of the lumbar support type slide pile structure of the present invention.
Fig. 4 is a perspective view of embodiment 2 in the lumbar support type slide-resistant pile structure of the present invention.
Fig. 5 is a sectional view of the lumbar support type slide pile structure according to the embodiment 2 of the present invention.
Fig. 6 is a top view of embodiment 2 in the lumbar support type slide pile structure of the present invention.
Fig. 7 is a perspective view of an embodiment 3 of the lumbar support type slide-resistant pile structure of the present invention.
Fig. 8 is a sectional view of the lumbar support type slide pile structure according to the embodiment 3 of the present invention.
Fig. 9 is a top view of the lumbar support type slide resistant pile structure of the embodiment 3 of the invention.
Fig. 10 is a perspective view of an embodiment 4 of the lumbar support slide-resistant pile structure of the present invention.
Fig. 11 is a sectional view of the lumbar support type slide pile structure of the embodiment 4 of the present invention.
Fig. 12 is a top view of the lumbar support type slide pile structure of the embodiment 4 of the invention.
The relevant references in the above figures are: 1-post stable stratum, 2-sliding body, 3-sliding surface, 4-pre-pile stable stratum, 5-soil retaining plate, 6-vertical pile, 7-vertical pile reinforcement cage, 8-cross beam reinforcement cage, 9-cross beam reinforcement cage, 10-block reinforcement cage, 11-block reinforcement cage, 12-diagonal beam reinforcement cage, 13-diagonal beam, 14-anchor block reinforcement cage, 15-anchor block and 16-local reserved steel plate of vertical pile reinforcement cage.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The terms "comprising," "having," and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
The waist support type slide-resistant pile structure comprises:
the post-pile structure comprises a plurality of vertical piles 6 which are arranged at intervals and used for supporting rock-soil bodies behind the piles, and a soil retaining structure 5 arranged between every two adjacent vertical piles 6;
the pile front structure comprises a plurality of supporting structures which are correspondingly connected with each vertical pile 6 and are arranged in the stable stratum 4 in front of the pile.
The support structure comprises support beams/plates.
The support beams/plates are used to stabilize the horizontal layout inside the ground 4 in front of the piles.
The support structure further comprises a stop/plate 11 connected to the ends of the support beam/plate.
The ends of the support beam/plate are connected to the upper or middle of the block/plate 11.
The support beams/plates are arranged obliquely to the upper surface of the inclined ground layer 4 before the pile is attached.
The support structure also includes anchor blocks 15 connected to the ends of the support beams/plates.
The vertical piles 6 and the supporting structure are of a reinforced concrete structure or a steel structure, and the soil retaining structure 5 is of one of a reinforced concrete structure, a steel structure and a wood structure.
The post-pile rock-soil body comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section which is used for supporting and arranged in the slope body stable stratum 1 of the post-pile rock-soil body and a loading section which is used for supporting and arranged on the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structure is connected with the front side of the loading section respectively.
The support structure is connected to the middle upper part of the vertical piles 6.
The construction method of the waist support type anti-slide pile structure comprises the following steps:
(1) excavating pile holes to a design position at intervals in the rock-soil mass behind the pile to be supported, and installing vertical piles 6 for supporting the rock-soil mass behind the pile in the pile holes;
(2) excavating a sliding body 2 in front of the vertical piles 6 to a stable stratum 4 in front of the piles, and building a soil retaining structure 5 between adjacent vertical piles 6;
(3) when the sliding body 2 in front of the vertical pile 6 is excavated to the pre-pile stable stratum 4, a plurality of supporting structures are arranged on the pre-pile stable stratum 4 at intervals, each supporting structure is connected with each vertical pile 6 in a one-to-one correspondence mode, then the backfill body covers the supporting structures to the designed height on the pre-pile stable stratum 4, and the backfill soil layer is compacted.
The vertical pile 6 and the supporting structure are both reinforced concrete structures, and the construction method specifically comprises the following steps:
(1) excavating pile holes in rock-soil bodies behind a pile to be supported at intervals to a designed position, mounting a vertical pile reinforcement cage 7 in the excavated pile holes, reserving reserved steel plates for connecting with a support structure reinforcement cage at the side part of the vertical pile reinforcement cage 7, and performing concrete pouring on the vertical pile reinforcement cage 7;
(2) after the concrete of the vertical pile 6 reaches the maintenance age, excavating the front sideslip body 2 of the pile body to a stable stratum, and erecting and installing the soil retaining structure 5;
(3) when a sliding body 2 in front of an excavated vertical pile 6 reaches a pre-pile stable stratum 4, a plurality of supporting structure steel reinforcement cages are arranged on the pre-pile stable stratum 4 at intervals, concrete of reserved steel plates on the side faces of the vertical pile 6 is broken at the connecting position of the vertical pile 6 and the supporting structure to leak the reserved steel plates, the reserved steel plates are connected with the supporting structure steel reinforcement cages, a template of the supporting structure is erected, concrete pouring is carried out on the supporting structure steel reinforcement cages, the template is dismantled after the maintenance age is reached, then backfill soil covers the supporting structure to the designed height on the pre-pile stable stratum 4, and a backfill soil layer is compacted.
The support structure comprises support beams/plates.
The supporting structure further comprises a stop block/plate 11 connected with the end part of the horizontal supporting beam/plate, the step (3) comprises the steps of arranging a plurality of horizontal supporting beam/plate reinforcement cages and corresponding stop block/plate reinforcement cages 10 on the front stable stratum 4 at horizontal intervals when a sliding body 2 in front of a vertical pile 6 is horizontally excavated to the front stable stratum 4 of the pile, integrally binding and fixing the end parts of the horizontal supporting beam/plate reinforcement cages and the stop block/plate reinforcement cages 10, breaking concrete reserved on the side surfaces of the vertical pile 6 at the connecting position of the vertical pile 6 and the horizontal supporting beam/plate reinforcement cages to leak reserved steel plates, connecting the reserved steel plates and the horizontal supporting beam/plate reinforcement cages by welding, erecting a template of the horizontal supporting beam/plate reinforcement cages and the stop block/plate reinforcement cages 10, and carrying out stop block pouring on the horizontal supporting beam/plate reinforcement cages and the stop block/plate reinforcement cages 10, and removing the formwork after reaching the maintenance age, then covering a support beam/plate and a stop block/plate 11 on the pile front stable stratum 4 to the designed height by a backfill body, and compacting the backfill layer, wherein the end part of the support beam/plate is connected with the upper end or the middle part of the stop block/plate 11.
The supporting structure further comprises anchor blocks 15 connected with the end portions of the supporting beams/plates, the step (3) comprises the steps of obliquely excavating a sliding body 2 in front of the vertical piles 6 to a pile front stable stratum 4, arranging a plurality of supporting beam/plate steel reinforcement cages and corresponding anchor block steel reinforcement cages 14 on the pile front stable stratum 4 at an inclined interval, integrally binding and fixing the end portions of the supporting beam/plate steel reinforcement cages and the anchor block steel reinforcement cages 14, breaking concrete reserved on the side faces of the vertical piles 6 at the connecting positions of the vertical piles 6 and the supporting beam/plate steel reinforcement cages to leak reserved steel plates, connecting the reserved steel plates and the supporting beam/plate steel reinforcement cages through welding, erecting templates of the supporting beam/plate steel reinforcement cages and the anchor block steel reinforcement cages 14, pouring the supporting beam/plate steel reinforcement cages and the anchor block steel reinforcement cages 14, and dismantling the templates after the curing period is reached, and then covering the anchor blocks 15 with backfill on the pre-pile stabilized stratum 4 to the designed height, and compacting the backfill.
The vertical piles 6 and the supporting structure are both steel structures, and the construction method specifically comprises the following steps:
(1) driving vertical piles 6 into rock-soil mass behind the pile to be supported at intervals to a designed position;
(2) excavating the pile body front sideslip body 2 to a stable stratum, and erecting and installing a soil retaining structure 5;
(3) when the sliding body 2 in front of the vertical pile 6 is excavated to the pre-pile stable stratum 4, according to the design position, the supporting structures are arranged on the pre-pile stable stratum 4 at intervals, the vertical pile 6 and the supporting structures are welded at the connecting position of the vertical pile 6 and the supporting structures, then the backfill soil body covers the supporting structures to the design height on the pre-pile stable stratum 4, and the backfill soil layer is compacted.
The support structure comprises support beams/plates.
The supporting structure further comprises a stop/plate 11 connected with the end part of the supporting beam/plate, the step (3) comprises the steps of horizontally arranging a plurality of supporting beams/plates and corresponding stop/plates 11 on the pre-pile stable stratum 4 at intervals when a sliding body 2 in front of the vertical pile 6 is horizontally excavated to the pre-pile stable stratum 4, welding the supporting beam/plate with one side of the vertical pile 6, welding the end part of the supporting beam/plate with the stop/plate 11, then covering the supporting beam/plate and the stop/plate 11 with backfill on the pre-pile stable stratum 4 to a designed height, and compacting the backfill layer, wherein the end part of the supporting beam/plate is connected with the upper end or the middle part of the stop/plate 11.
The supporting structure further comprises anchor blocks 15 connected with the end portions of the supporting beams/plates, the step (3) comprises the steps of obliquely arranging a plurality of supporting beams/plates and corresponding anchor blocks 15 at intervals on the stable stratum 4 in front of the pile when a sliding body 2 in front of the vertical pile 6 is obliquely excavated to the stable stratum 4 in front of the pile, welding the supporting beams/plates with one side of the vertical pile 6, welding the end portions of the supporting beams/plates with the anchor blocks 15, then covering the anchor blocks 15 with backfill soil on the stable stratum 4 in front of the pile to a designed height, and compacting the backfill soil layer.
The post-pile rock-soil body comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section which is used for supporting and arranged in the slope body stable stratum 1 of the post-pile rock-soil body and a loading section which is used for supporting and arranged on the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structure is connected with the front side of the loading section respectively.
The invention is further illustrated by the following specific examples:
example 1
As shown in fig. 1 to 3, the lumbar support type slide pile structure in this embodiment 1 includes:
the pile rear structure comprises a plurality of vertical piles 6 which are arranged at intervals and used for supporting rock-soil bodies behind the piles, and soil retaining structures 5 which are arranged between the adjacent vertical piles 6; the post-pile rock-soil body comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section which is used for supporting and arranged in the slope body stable stratum 1 of the post-pile rock-soil body and a loading section which is used for supporting and arranged on the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structure is connected with the front side of the loading section respectively.
The pile front structure comprises a plurality of supporting structures which are correspondingly connected with each vertical pile 6 and are arranged in the stable stratum 4 in front of the pile. The support structure comprises horizontal support beams/plates 9 arranged horizontally inside the stable ground 4 before the piles. The vertical piles 6 and the supporting structure are both reinforced concrete structures, and the soil retaining structure 5 is one of a reinforced concrete structure, a steel structure and a wood structure.
The construction method of the waist-brace type slide-resistant pile structure in the embodiment 1 specifically comprises the following steps:
(1) excavating a pile hole to a design position at intervals in post-pile rock-soil bodies needing to be supported, installing a vertical pile reinforcement cage 7 in the excavated pile hole, reserving a reserved steel plate 16 for connecting a horizontal supporting beam/plate reinforcement cage 8 at the side part of the vertical pile reinforcement cage 7, and performing concrete pouring on the vertical pile reinforcement cage 7, wherein the post-pile rock-soil bodies comprise a sliding body 2 and a slope body stable stratum 1, each vertical pile 6 comprises an embedded section for supporting in the slope body stable stratum 1 of the post-pile rock-soil body and a loaded section for supporting in the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structures are respectively connected with the front side of the loaded section;
(2) after the concrete of the vertical pile 6 reaches the maintenance age, excavating a pile body front sideslip body 2 to a stable stratum, and carrying out erection and installation on a retaining structure 5, wherein the retaining structure 5 is a retaining plate, the erection and installation of the retaining structure 5 is particularly carried out from bottom to top, and the retaining plate can be a prefabricated steel structure or a wood structure or a cast-in-place reinforced concrete structure;
(3) when a sliding body 2 in front of a vertical pile 6 is excavated to a pre-pile stable stratum 4, a plurality of horizontal supporting beams/plate steel bar cages 8 are arranged on the pre-pile stable stratum 4 at intervals, concrete of reserved steel plates on the side faces of the vertical pile 6 is broken at the connecting positions of the vertical pile 6 and the horizontal supporting beams/plates 9 to leak reserved steel plates 16, the reserved steel plates 16 are connected with the horizontal supporting beams/plate steel bar cages 8, templates of the horizontal supporting beams/plates 9 are erected, concrete pouring is carried out on the horizontal supporting beams/plate steel bar cages 8, the templates are removed after the maintenance age is reached, then a backfill body covers the horizontal supporting beams/plates 9 to the designed height on the pre-pile stable stratum 4, and the backfill body is compacted.
Example 2
As shown in fig. 4 to 6, the lumbar support type slide-resistant pile structure in this embodiment 2 includes:
the post-pile structure comprises a plurality of vertical piles 6 which are arranged at intervals and used for supporting rock-soil bodies behind the piles, and a soil retaining structure 5 arranged between every two adjacent vertical piles 6; the post-pile rock-soil body comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section which is used for supporting and arranged in the slope body stable stratum 1 of the post-pile rock-soil body and a loading section which is used for supporting and arranged on the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structure is connected with the front side of the loading section respectively.
The pile front structure comprises a plurality of supporting structures which are correspondingly connected with each vertical pile 6 and are arranged in the stable stratum 4 in front of the pile. The support structure comprises horizontal support beams/plates 9 arranged horizontally inside the stable ground 4 in front of the piles and vertically arranged blocks/plates 11 connected to the ends of the horizontal support beams/plates 9, the ends of the horizontal support beams/plates 9 being connected to the upper ends of the blocks/plates 11. The vertical piles 6 and the supporting structure are both reinforced concrete structures, and the soil retaining structure 5 is one of a reinforced concrete structure, a steel structure and a wood structure.
The construction method of the waist-brace type slide-resistant pile structure in the embodiment 2 specifically comprises the following steps:
(1) excavating a pile hole to a design position at intervals in post-pile rock-soil bodies needing to be supported, installing a vertical pile reinforcement cage 7 in the excavated pile hole, reserving a reserved steel plate 16 for connecting a horizontal supporting beam/plate reinforcement cage 8 at the side part of the vertical pile reinforcement cage 7, and performing concrete pouring on the vertical pile reinforcement cage 7, wherein the post-pile rock-soil bodies comprise a sliding body 2 and a slope body stable stratum 1, each vertical pile 6 comprises an embedded section for supporting in the slope body stable stratum 1 of the post-pile rock-soil body and a loaded section for supporting in the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structures are respectively connected with the front side of the loaded section;
(2) after the concrete of the vertical pile 6 reaches the maintenance age, excavating a pile body front sideslip body 2 to a stable stratum, and carrying out erection and installation on a retaining structure 5, wherein the retaining structure 5 is a retaining plate, the erection and installation of the retaining structure 5 is particularly carried out from bottom to top, and the retaining plate can be a prefabricated steel structure or a wood structure or a cast-in-place reinforced concrete structure;
(3) when a sliding body 2 in front of a vertical pile 6 is horizontally excavated to a pre-pile stable stratum 4, a plurality of horizontal supporting beams/plate reinforcement cages 8 and corresponding stop blocks/plate reinforcement cages 10 are horizontally arranged on the pre-pile stable stratum 4 at intervals, the end parts of the horizontal supporting beams/plate reinforcement cages 8 and the upper ends of the stop blocks/plate reinforcement cages 10 are integrally bound and fixed, concrete of reserved steel plates on the side surfaces of the vertical pile 6 is broken at the connecting position of the vertical pile 6 and the horizontal supporting beams/plate reinforcement cages 8 to leak reserved steel plates 16, the reserved steel plates 16 and the horizontal supporting beams/plate reinforcement cages 8 are connected by welding, a formwork of the horizontal supporting beams/plates 9 and the stop blocks/plates 11 is erected, the horizontal supporting beams/plate reinforcement cages 8 and the stop blocks/plate reinforcement cages 10 are cast by concrete, and the formwork is removed after a maintenance period is reached, the backfill then covers the horizontal support beams/plates 9 and the stops/plates 11 to the design height above the pre-pile stabilized ground 4 and compacts the backfill, the ends of the horizontal support beams/plates 9 and the upper ends of the stops/plates 11.
Example 3
As shown in fig. 7 to 9, the lumbar support type slide-resistant pile structure in this embodiment 3 includes:
the post-pile structure comprises a plurality of vertical piles 6 which are arranged at intervals and used for supporting rock-soil bodies behind the piles, and a soil retaining structure 5 arranged between every two adjacent vertical piles 6; the post-pile rock-soil body comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section which is used for supporting and arranged in the slope body stable stratum 1 of the post-pile rock-soil body and a loading section which is used for supporting and arranged on the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structure is connected with the front side of the loading section respectively.
The pile front structure comprises a plurality of supporting structures which are correspondingly connected with each vertical pile 6 and are arranged in the stable stratum 4 in front of the pile. The support structure comprises horizontal support beams/plates 9 arranged horizontally inside the stable ground 4 in front of the piles and vertically arranged blocks/plates 11 connected to the ends of the horizontal support beams/plates 9, the ends of the horizontal support beams/plates 9 being connected to the middle of the blocks/plates 11. The vertical piles 6 and the supporting structure are both reinforced concrete structures, and the soil retaining structure 5 is one of a reinforced concrete structure, a steel structure and a wood structure.
The construction method of the waist-brace type slide-resistant pile structure in the embodiment 3 specifically comprises the following steps:
(1) excavating a pile hole to a design position at intervals in post-pile rock-soil bodies needing to be supported, installing a vertical pile reinforcement cage 7 in the excavated pile hole, reserving a reserved steel plate 16 for connecting a horizontal supporting beam/plate reinforcement cage 8 at the side part of the vertical pile reinforcement cage 7, and performing concrete pouring on the vertical pile reinforcement cage 7, wherein the post-pile rock-soil bodies comprise a sliding body 2 and a slope body stable stratum 1, each vertical pile 6 comprises an embedded section for supporting in the slope body stable stratum 1 of the post-pile rock-soil body and a loaded section for supporting in the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structures are respectively connected with the front side of the loaded section;
(2) after the concrete of the vertical pile 6 reaches the maintenance age, excavating a pile body front sideslip body 2 to a stable stratum, and carrying out erection and installation on a retaining structure 5, wherein the retaining structure 5 is a retaining plate, the erection and installation of the retaining structure 5 is particularly carried out from bottom to top, and the retaining plate can be a prefabricated steel structure or a wood structure or a cast-in-place reinforced concrete structure;
(3) when a sliding body 2 in front of a vertical pile 6 is horizontally excavated to a pre-pile stable stratum 4, a plurality of horizontal supporting beams/plate reinforcement cages and corresponding stop blocks/plate reinforcement cages 10 are horizontally arranged on the pre-pile stable stratum 4 at intervals, the end parts of the horizontal supporting beams/plate reinforcement cages 8 and the upper ends of the stop blocks/plate reinforcement cages 10 are integrally bound and fixed, concrete of reserved steel plates 16 on the side surfaces of the vertical pile 6 is broken at the connecting position of the vertical pile 6 and the horizontal supporting beams/plate reinforcement cages 8 to leak the reserved steel plates 16, the reserved steel plates 16 and the horizontal supporting beams/plate reinforcement cages 8 are connected by welding, a formwork of the horizontal supporting beams/plates 9 and the stop blocks/plates 11 is erected, the horizontal supporting beams/plate reinforcement cages 8 and the stop blocks/plate reinforcement cages 10 are cast by concrete, and the formwork is removed after a maintenance period is reached, then, a backfill body covers the supporting beams/plates 9 and the stop blocks/plates 11 to the designed height on the stabilization stratum 4 in front of the pile, and the backfill layer is compacted, wherein the end parts of the horizontal supporting beams/plates 9 are connected with the middle parts of the stop blocks/plates 11.
Example 4
As shown in fig. 10 to 12, the lumbar support type slide pile structure in this embodiment 4 includes:
the post-pile structure comprises a plurality of vertical piles 6 which are arranged at intervals and used for supporting rock-soil bodies behind the piles, and a soil retaining structure 5 arranged between every two adjacent vertical piles 6; the post-pile rock-soil body comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section which is used for supporting and arranged in the slope body stable stratum 1 of the post-pile rock-soil body and a loading section which is used for supporting and arranged on the front side of the sliding body 2 of the post-pile rock-soil body, and the supporting structure is connected with the front side of the loading section respectively.
The pile front structure comprises a plurality of supporting structures which are correspondingly connected with each vertical pile 6 and are arranged in the stable stratum 4 in front of the pile. The support structure comprises inclined supporting beams/plates 13 arranged obliquely on the surface of the inclined stable ground 4 before the piles and anchor blocks 15 connected to the ends of the inclined supporting beams/plates 13 and arranged obliquely, the ends of the inclined supporting beams/plates 13 being connected to the anchor blocks 15. The vertical piles 6 and the supporting structure are both reinforced concrete structures, and the soil retaining structure 5 is one of a reinforced concrete structure, a steel structure and a wood structure.
The construction method of the lumbar support type slide-resistant pile structure in the embodiment 4 specifically comprises the following steps:
(1) excavating a pile hole to a design position at intervals in post-pile rock-soil mass needing to be supported, installing a vertical pile reinforcement cage 7 in the excavated pile hole, reserving a reserved steel plate 16 for connecting with an inclined support beam/plate reinforcement cage 8 at the side part of the vertical pile reinforcement cage 7, and performing concrete pouring on the vertical pile reinforcement cage 7, wherein the post-pile rock-soil mass comprises a sliding body 2 and a slope body stable stratum 1, the vertical pile 6 comprises an embedded section for supporting in the slope body stable stratum 1 of the post-pile rock-soil mass and a loaded section for supporting in front of the sliding body 2 of the post-pile rock-soil mass, and the support structures are respectively connected with the front of the loaded section;
(2) after the concrete of the vertical pile 6 reaches the maintenance age, excavating a pile body front sideslip body 2 to a stable stratum, and carrying out erection and installation on a retaining structure 5, wherein the retaining structure 5 is a retaining plate, the erection and installation of the retaining structure 5 is particularly carried out from bottom to top, and the retaining plate can be a prefabricated steel structure or a wood structure or a cast-in-place reinforced concrete structure;
(3) when a sliding body 2 in front of a vertical pile 6 is obliquely excavated to a stable stratum 4 in front of the pile, a plurality of oblique supporting beam/plate reinforcement cages 12 and corresponding anchor block reinforcement cages 14 are obliquely arranged at intervals in front of the pile in the stable stratum 4, the connecting parts of the end parts of the oblique supporting beam/plate reinforcement cages 12 and the anchor block reinforcement cages 140 are integrally bound and fixed, concrete of reserved steel plates 16 on the side surfaces of the vertical pile 6 is broken at the connecting positions of the vertical pile 6 and the oblique supporting beam/plate reinforcement cages 12 to leak the reserved steel plates 16, the reserved steel plates 16 are connected with the oblique supporting beam/plate reinforcement cages 12 through welding, templates of the oblique supporting beam/plate reinforcement cages 12 and the anchor blocks 15 are erected, concrete is poured on the oblique supporting beam/plate reinforcement cages 12 and the anchor block reinforcement cages 14, the templates are removed after a maintenance period is reached, and then earth is backfilled on the stable stratum 4 in front of the pile to cover the anchor blocks 15 to a design height, and compacting the backfill with the ends of the inclined support beams/plates 13 connected to the anchor blocks 15.
The invention also aims at implementing a specific embodiment when the vertical piles 6 and the supporting structure are both of reinforced concrete structures, which is not shown in the figure.
Structurally, the reinforced concrete structures of the horizontal support beam/plate 9, the stopper/plate 11, the inclined support beam/plate 13, and the anchor block 15 of the above embodiments 1 to 4 are replaced with steel structures, respectively.
On the basis that the reinforced concrete structure of the embodiment 1 is replaced by the steel structure foundation, the construction method comprises the following steps:
(1) driving vertical piles 6 into rock-soil mass behind the pile to be supported at intervals to a designed position;
(2) excavating the pile body front sideslip body 2 to a stable stratum, and erecting and installing a soil retaining structure 5;
(3) when a sliding body 2 in front of a vertical pile 6 is excavated to a pre-pile stable stratum 4, according to a design position, supporting structures are arranged on the pre-pile stable stratum 4 at intervals, the connecting position of the vertical pile 6 and the supporting structures is welded, then a backfill body covers the supporting structures to a design height on the pre-pile stable stratum 4, and the backfill soil layer is compacted, wherein the supporting structures comprise supporting beams/plates.
On the basis that the reinforced concrete structure of embodiment 2 is replaced with the steel structure foundation, the construction method is as follows:
(1) driving vertical piles 6 into rock-soil mass behind the pile to be supported at intervals to a designed position;
(2) excavating the pile body front sideslip body 2 to a stable stratum, and erecting and installing a soil retaining structure 5;
(3) the supporting structure further comprises a stop/plate 11 connected with the end portions of the supporting beams/plates, when a sliding body 2 in front of the vertical pile 6 is horizontally excavated to a stable stratum 4 in front of the pile, a plurality of supporting beams/plates and corresponding stop/plates 11 are horizontally arranged on the stable stratum 4 in front of the pile at intervals, the supporting beams/plates are welded with one side of the vertical pile 6, the end portions of the supporting beams/plates are welded with the stop/plate 11, then a backfill body covers the supporting beams/plates and the stop/plates 11 to a designed height on the stable stratum 4 in front of the pile, the backfill layer is compacted, and the end portions of the supporting beams/plates are connected with the upper end of the stop/plate 11.
On the basis that the reinforced concrete structure of embodiment 3 is replaced with the steel structure foundation, the construction method is as follows:
(1) driving vertical piles 6 into rock-soil mass behind the pile to be supported at intervals to a designed position;
(2) excavating the pile body front sideslip body 2 to a stable stratum, and erecting and installing a soil retaining structure 5;
(3) the supporting structure further comprises a stop/plate 11 connected with the end portions of the supporting beams/plates, when a sliding body 2 in front of the vertical pile 6 is horizontally excavated to a stable stratum 4 in front of the pile, a plurality of supporting beams/plates and corresponding stop/plates 11 are horizontally arranged on the stable stratum 4 in front of the pile at intervals, the supporting beams/plates are welded with one side of the vertical pile 6, the end portions of the supporting beams/plates are welded with the stop/plate 11, then a backfill body covers the supporting beams/plates and the stop/plates 11 to a designed height on the stable stratum 4 in front of the pile, the backfill layer is compacted, and the end portions of the supporting beams/plates are connected with the middle portions of the stop/plates 11.
On the basis that the reinforced concrete structure of embodiment 4 is replaced with the steel structure foundation, the construction method is as follows:
(1) driving vertical piles 6 into rock-soil mass behind the pile to be supported at intervals to a designed position;
(2) excavating a pile body front side sliding body 2 to a stable stratum, and carrying out erection of a soil retaining structure 5;
(3) the supporting structure further comprises anchor blocks 15 connected with the end portions of the supporting beams/plates, when a sliding body 2 in front of the vertical pile 6 is obliquely excavated to a stable stratum 4 in front of the pile, a plurality of supporting beams/plates and corresponding anchor blocks 15 are obliquely arranged on the stable stratum 4 in front of the pile at intervals, the supporting beams/plates are welded with one side of the vertical pile 6, the end portions of the supporting beams/plates are welded with the anchor blocks 15, then backfill soil on the stable stratum 4 in front of the pile covers the anchor blocks 15 to the designed height, and the backfill soil layer is compacted.
The waist-supported anti-slide pile structure adopts an integral combined structure consisting of vertical piles, horizontal supporting beams/plates or inclined supporting beams/plates, baffle plates/blocks or anchor blocks and soil retaining plates, is more reasonable in stress and good in economical efficiency, and has higher integral stability, stronger engineering applicability and construction operability.
The baffle plate/block or the anchor block of the waist support type anti-slide pile structure is positioned in the stable stratum in front of the pile, and the stratum at the front end of the waist support type anti-slide pile structure generates end resistance; the horizontal support beams/plates are located inside the stabilized ground before the pile and the inclined support beams/plates are located on the surface of the stabilized ground before the pile, thereby providing side frictional resistance, respectively. The resistance all provides resistance before the stake for the vertical pile through fixed node above, reduces pile body atress, can effectively improve slide-resistant pile structure overall stability.
The waist support type anti-slide pile structure can be applied to different projects such as natural landslide management, project high slope reinforcement, deep foundation pit support and the like, wherein the selection of the horizontal support beam/plate or the inclined support beam/plate, the baffle plate/block or the anchor block can be changed according to specific construction conditions, the section is increased to form a plate, and the plate can provide larger side friction resistance and end resistance and can be used for the condition of larger landslide thrust. Therefore, the structure has strong engineering applicability.
The waist support type anti-slide pile structure improves the stress of the pile body structure, can reduce the pile diameter to a certain extent, reduces the reinforcement amount, and achieves better slope body treatment effect on the basis of reducing the engineering cost. Therefore, the structure has good economic benefit.
The construction method of the waist support type anti-slide pile structure adopts a step-by-step construction method, has reasonable working procedures, simple construction process and strong operability, and can complete large-scale landslide treatment, high slope reinforcement or deep foundation pit support within a relatively short construction period. Therefore, the structure has strong construction operability.
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.

Claims (10)

1. The construction method of the waist support type anti-slide pile structure is characterized by comprising the following steps:
(1) excavating pile holes to a design position at intervals in the rock-soil mass behind the pile to be supported, and installing vertical piles (6) for supporting the rock-soil mass behind the pile in the pile holes;
(2) excavating a sliding body (2) in front of the vertical piles (6) to a stable stratum (4) in front of the piles, and building a soil retaining structure (5) between adjacent vertical piles (6);
(3) when a sliding body (2) in front of a vertical pile (6) is excavated to a stable stratum (4) in front of the pile, a plurality of supporting structures are arranged on the stable stratum (4) in front of the pile at intervals, each supporting structure is respectively connected with each vertical pile (6) in a one-to-one correspondence manner, and then a backfill body covers the supporting structures to a designed height on the stable stratum (4) in front of the pile, and the backfill soil layer is compacted.
2. The construction method of the waist-supported slide-resistant pile structure according to claim 1, wherein the vertical pile (6) and the support structure are both reinforced concrete structures, and the construction method specifically comprises the following steps:
(1) excavating pile holes in rock-soil bodies behind a pile to be supported at intervals to a designed position, mounting a vertical pile reinforcement cage (7) in the excavated pile holes, reserving a local steel plate (16) for connecting with a support structure reinforcement cage at the side part of the vertical pile reinforcement cage (7), and performing concrete pouring on the vertical pile reinforcement cage (7);
(2) after the concrete of the vertical pile (6) reaches the maintenance age, excavating the front sideslip body (2) of the pile body to a stable stratum, and erecting and installing a soil retaining structure (5);
(3) when a sliding body (2) before a vertical pile (6) is excavated to a stable stratum (4) before the pile, a plurality of supporting structure steel reinforcement cages are arranged on the stable stratum (4) before the pile at intervals, concrete of a reserved steel plate (16) on the side surface of the vertical pile (6) is broken at the connecting position of the vertical pile (6) and the supporting structure so as to leak the reserved steel plate (16), the reserved steel plate (16) is connected with the supporting structure steel reinforcement cages, a template of the supporting structure is erected, concrete pouring is carried out on the supporting structure steel reinforcement cages, the template is removed after the maintenance age is reached, then a backfill body covers the supporting structure to the designed height on the stable stratum (4) before the pile, and a backfill soil layer is compacted.
3. A method of lumbar support slide-resistant pile structure construction as set forth in claim 2, wherein said support structure includes support beams/plates.
4. The construction method of a waist-supported anti-slide pile structure according to claim 3, wherein the supporting structure further comprises a stopper/plate (11) connected with the end of the horizontal supporting beam/plate, the step (3) comprises arranging a plurality of horizontal supporting beam/plate reinforcement cages and corresponding stopper/plate reinforcement cages (10) on the pre-pile stabilization ground (4) at intervals horizontally when the sliding body (2) in front of the vertical pile (6) is excavated to the pre-pile stabilization ground (4), integrally binding and fixing the end of the horizontal supporting beam/plate reinforcement cage and the stopper/plate reinforcement cage (10), breaking the concrete reserved on the side of the vertical pile (6) at the connecting position of the vertical pile (6) and the horizontal supporting beam/plate reinforcement cage to leak the reserved steel plate (16), and connecting the reserved steel plate (16) with the horizontal supporting beam/plate reinforcement cage by welding, erecting a template of a horizontal supporting beam/plate reinforcement cage and a stop block/plate reinforcement cage (10), performing concrete pouring on the horizontal supporting beam/plate reinforcement cage and the stop block/plate reinforcement cage (10), removing the template after reaching the curing age, backfilling a supporting beam/plate and the stop block/plate (11) to the designed height on a pile front stable stratum (4), compacting the backfilled soil layer, and connecting the end part of the supporting beam/plate with the upper end or the middle part of the stop block/plate (11).
5. The construction method of a waist-supported anti-slide pile structure according to claim 3, wherein the supporting structure further comprises anchor blocks (15) connected to the ends of the supporting beams/plates, the step (3) comprises arranging a plurality of inclined supporting beam/plate reinforcement cages and corresponding anchor block reinforcement cages (14) at inclined intervals in the pile-front stable ground (4) when the slide body (2) in front of the vertical piles (6) is obliquely excavated to the pile-front stable ground (4), integrally binding and fixing the ends of the inclined supporting beam/plate reinforcement cages and the anchor block reinforcement cages (14), breaking the concrete of the reserved steel plates (16) on the sides of the vertical piles (6) at the connecting positions of the vertical piles (6) and the inclined supporting beam/plate reinforcement cages to leak the reserved steel plates (16), and connecting the reserved steel plates (16) and the supporting beam/plate reinforcement cages by welding, erecting templates of the oblique supporting beam/plate reinforcement cage and the anchor block reinforcement cage (14), performing integrated concrete pouring on the oblique supporting beam/plate reinforcement cage and the anchor block reinforcement cage (14), removing the templates after the curing age is reached, covering a backfill on the pile front stable stratum (4) with the anchor block (15) to the designed height, and compacting the backfill.
6. The construction method of the waist-supported slide-resistant pile structure according to claim 1, wherein the vertical piles (6) and the support structure are both steel structures, and the construction method specifically comprises the following steps:
(1) vertical piles (6) are driven into the rock-soil mass behind the pile to be supported at intervals to a designed position;
(2) excavating a side sliding body (2) in front of the pile body to a stable stratum, and erecting and installing a soil retaining structure (5);
(3) when a sliding body (2) in front of a vertical pile (6) is excavated to a stable stratum (4) in front of the pile, supporting structures are arranged on the stable stratum (4) in front of the pile at intervals according to design positions, the vertical pile (6) and the supporting structures are welded at the connecting position of the vertical pile and the supporting structures, then a backfill body covers the supporting structures to the design height on the stable stratum (4) in front of the pile, and the backfill soil layer is compacted.
7. A method of lumbar support slide-resistant pile structure construction according to claim 6, wherein the support structure comprises support beams/plates.
8. A construction method of a lumbar support slide pile structure according to claim 6, characterized in that the support structure further comprises a stopper/plate (11) connected to the end of the support beam/plate, the step (3) comprises the steps that when the sliding body (2) in front of the vertical pile (6) is horizontally excavated to the stable stratum (4) in front of the pile, arranging a plurality of supporting beams/plates and corresponding stoppers/plates (11) on the stable stratum (4) in front of the pile at intervals horizontally, welding the supporting beams/plates with one side of the vertical pile (6), welding the end parts of the supporting beams/plates with the stoppers/plates (11), backfilling the supporting beams/plates and the stoppers/plates (11) on the stable stratum (4) in front of the pile to a designed height, and compacting the backfill soil layer, wherein the end parts of the supporting beams/plates are connected with the upper ends or the middle parts of the stop blocks/plates (11).
9. The lumbar support type slide-resistant pile structure construction method as set forth in claim 6, wherein the support structure further comprises anchor blocks (15) connected to ends of the support beams/plates, and the step (3) comprises laying a plurality of support beams/plates and corresponding anchor blocks (15) at inclined intervals in the pre-pile stabilized ground (4) when the sliding body (2) in front of the vertical pile (6) is obliquely excavated to the pre-pile stabilized ground (4), welding the support beams/plates to one side of the vertical pile (6), welding ends of the support beams/plates to the anchor blocks (15), and thereafter backfilling the anchor blocks (15) to a designed height on the pre-pile stabilized ground (4), and compacting the backfilled ground.
10. The construction method of a waist-supported slide-resistant pile structure according to claim 1, wherein the post-pile rock-soil mass comprises a slide body (2) and a slope body stabilizing ground layer (1), the vertical pile (6) comprises an embedded section for supporting in the slope body stabilizing ground layer (1) of the post-pile rock-soil mass and a loaded section for supporting in front of the slide body (2) of the post-pile rock-soil mass, and the support structures are respectively connected with the front of the loaded section.
CN202210086710.5A 2022-01-25 2022-01-25 Construction method of waist support type anti-slide pile structure Pending CN114508113A (en)

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Publication number Priority date Publication date Assignee Title
CN106498953A (en) * 2016-11-23 2017-03-15 中国科学院、水利部成都山地灾害与环境研究所 Cut slope composite supporting construction and its construction method
CN107938685A (en) * 2017-06-20 2018-04-20 重庆市高新工程勘察设计院有限公司 A kind of new diagonal brace composite support device
CN210917398U (en) * 2019-08-22 2020-07-03 中铁十局集团第三建设有限公司 A supporting construction for inflation dirt road moat is domatic to be under construction
CN111395316A (en) * 2020-04-28 2020-07-10 中铁二院工程集团有限责任公司 Composite anti-slide pile and construction method
AU2020102073A4 (en) * 2020-09-01 2020-10-08 BZ Geotechnical Co. Ltd. Protection device for landslide prevention

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106498953A (en) * 2016-11-23 2017-03-15 中国科学院、水利部成都山地灾害与环境研究所 Cut slope composite supporting construction and its construction method
CN107938685A (en) * 2017-06-20 2018-04-20 重庆市高新工程勘察设计院有限公司 A kind of new diagonal brace composite support device
CN210917398U (en) * 2019-08-22 2020-07-03 中铁十局集团第三建设有限公司 A supporting construction for inflation dirt road moat is domatic to be under construction
CN111395316A (en) * 2020-04-28 2020-07-10 中铁二院工程集团有限责任公司 Composite anti-slide pile and construction method
AU2020102073A4 (en) * 2020-09-01 2020-10-08 BZ Geotechnical Co. Ltd. Protection device for landslide prevention

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Application publication date: 20220517