CN113981996A - Construction method of combined type slide-resistant pile structure - Google Patents

Abstract

The invention discloses a construction method of a combined type anti-slide pile structure, and relates to the technical field of slope collapse prevention construction. The construction method of the combined type slide-resistant pile structure specifically comprises the following operations: s1, optimizing the design of the composite piles, reserving a construction platform on the slope easy to collapse, arranging the anti-slide piles in an arch shape, arranging the anti-slide piles in front and back rows, connecting the piles through connecting beams, and forming a plurality of 'pin' -shaped composite pile units on the whole. According to the construction method of the combined type anti-slide pile structure, the combined type anti-slide piles are arranged in a shape like a Chinese character 'pin', two rows of piles are connected into an integral arch structure through the connecting beams, pile top displacement is effectively controlled, and landslide thrust of front and rear rows of piles is shared more reasonably; the actual distribution condition of landslide thrust is considered in the design process to determine the pile length of the anti-slide pile, the deep displacement of the pile body and the slide body is detected by adopting the inclinometer, the stability condition of the landslide can be mastered in real time, and meanwhile powerful data are provided for analyzing the prevention and control effect of the anti-slide pile.

Description

Construction method of combined type slide-resistant pile structure

Technical Field

The invention relates to the technical field of slope collapse prevention construction, in particular to a construction method of a combined type slide-resistant pile structure.

Background

The anti-slide pile has the function of balancing the thrust of the slide body by using the resistance (anchoring force) of a stable stratum below the sliding surface of the anti-slide pile to the pile, so that the stability of the anti-slide pile is improved. When the sliding body slides downwards, the sliding body is resisted by the anti-sliding pile, so that the sliding body in front of the pile reaches a stable state. The method selects the wooden pile, the steel pile, the concrete and the reinforced concrete pile according to the thickness of the sliding body, the thrust, the waterproof requirement, the construction condition and the like. The depth of the anti-slide pile embedded below the stratum is one third of the designed pile length in the soft rock stratum according to general experience; the length of the hard rock is one fourth of the designed pile length; the soil sliding bed is designed to be half of the pile length. When the soil layer slides along the surface of the foundation rock, the anchoring depth is 2-5 times of the adopted pile diameter. The arrangement form of the anti-slide piles comprises pile rows connected with each other, pile rows spaced at the lower part and connected with the top, anchor piles spaced with each other and the like. The distance between the piles is generally 3-5 times of the diameter of the piles, so that the sliding soil body does not slide out of the piles.

The existing method adopts single-row piles for the construction of the slide-resistant piles, is easy to cause the collapse phenomenon on high-risk easy-to-collapse slopes, and has low construction safety.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a construction method of a combined slide-resistant pile structure, which solves the problems that the existing method adopts a single row of piles for slide-resistant pile construction, the collapse phenomenon is easily caused for high-risk easy-to-collapse slopes, and the construction safety is low.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a construction method of a combined type slide-resistant pile structure specifically comprises the following operations:

s1, optimizing the design of the composite piles, reserving a construction platform on the slope easy to collapse, arranging the anti-slide piles in an arch shape, dividing the anti-slide piles into front and rear rows, connecting the piles with the piles through connecting beams, and forming a plurality of 'pin' type composite pile units on the whole, wherein the tops of the connecting beams are flush with the slope surface, and the 'pin' type composite pile units are as follows: forming two anti-slide piles into a V-shaped combination, transversely arranging three V-shaped combinations, and arranging a transverse anti-slide pile between two adjacent V-shaped combinations to form a combined pile after connection;

s2, because the slope body behind the pile is still easy to collapse, a retaining wall is arranged behind the pile and resists landslide thrust together with the anti-slide pile, the retaining wall is arranged along the connecting beam of the anti-slide pile behind, and the retaining wall foundation is deep below the elevation of the connecting beam;

s3, cutting the slope according to the original design slope rate, cleaning the slope surface from top to bottom, and cleaning loose soil and rocks on the slope surface without disturbing the stratum state of the slope;

s4, pile hole piles are formed by adopting a rotary drilling rig, a lengthened steel pile casing is matched, a hydraulic vibration hammer is adopted to drive into a rock stratum without wall protection, after one pile is poured for 7 days, holes can be drilled in adjacent pile holes, after the back row pile is poured, the front row pile is constructed, when the front row pile is constructed, pile holes of anti-slide piles at two sides are firstly constructed, and after the anti-slide piles at two sides are poured for 7 days, the middle anti-slide pile is excavated and poured;

s5, reserving the anti-slide pile part connected with the connecting beam, and after the pile body below the connecting beam is poured for 7 days, starting to install connecting beam reinforcing steel bars and form erecting pouring. Adopting mechanical hole forming construction to construct a combined type slide-resistant pile;

and S6, arranging a monitoring device, namely an inclinometer, detecting the front row pile and one rear row pile of the middle roof truss type pile unit, tracking the monitoring effect, and performing comparative analysis.

(III) advantageous effects

The invention provides a construction method of a combined type slide-resistant pile structure. The method has the following beneficial effects:

(1) the construction method of the combined type anti-slide pile structure adopts measures of arranging and matching the combined type anti-slide piles with the arch-connected circular cross sections and arranging retaining walls on the slope bodies of the back row piles, can effectively prevent and treat the side slopes easy to slide and collapse, and has good collapse prevention stability;

(2) the two rows of piles are connected into an integral arch structure through the connecting beam, pile top displacement is effectively controlled, landslide thrust of the front row of piles and the rear row of piles is shared more reasonably, and the arrangement structure is good in stability and economical and reasonable;

(3) the rotary drilling construction is adopted, and the lengthened steel protective cylinder is erected in cooperation with the hydraulic vibration hammer, so that the wall protection is not needed, the environment is not polluted, and the mechanized construction requirements are met;

(4) in the design process, the actual distribution condition of landslide thrust is considered to determine the pile length of the anti-slide pile, and the anti-slide pile is reasonable in design, safe and stable;

(5) based on the internet technology, the inclinometer is adopted to detect the deep displacement of the pile body and the sliding body, so that the stability of the landslide can be mastered in real time, and meanwhile, powerful data are provided for analyzing the control effect of the anti-slide pile.

Drawings

Fig. 1 is a plan view of a combined slide-resistant pile according to the invention;

fig. 2 is an elevation view of the combined slide-resistant pile of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a construction method of a combined type slide-resistant pile structure specifically comprises the following operations:

s1, optimizing the design of the composite piles, reserving a construction platform on the slope easy to collapse, arranging the anti-slide piles in an arch shape, dividing the anti-slide piles into front and rear rows, connecting the piles with the piles through connecting beams, and forming a plurality of 'pin' type composite pile units on the whole, wherein the tops of the connecting beams are flush with the slope surface, and the 'pin' type composite pile units are as follows: forming two anti-slide piles into a V-shaped combination, transversely arranging three V-shaped combinations, and arranging a transverse anti-slide pile between two adjacent V-shaped combinations to form a combined pile after connection;

s2, because the slope body behind the pile is still easy to collapse, a retaining wall is arranged behind the pile and resists landslide thrust together with the anti-slide pile, the retaining wall is arranged along the connecting beam of the anti-slide pile behind, and the retaining wall foundation is deep below the elevation of the connecting beam;

s3, cutting the slope according to the original design slope rate, cleaning the slope surface from top to bottom, and cleaning loose soil and rocks on the slope surface without disturbing the stratum state of the slope;

s4, pile hole piles are formed by adopting a rotary drilling rig, a lengthened steel pile casing is matched, a hydraulic vibration hammer is adopted to drive into a rock stratum without wall protection, after one pile is poured for 7 days, holes can be drilled in adjacent pile holes, after the back row pile is poured, the front row pile is constructed, when the front row pile is constructed, pile holes of anti-slide piles at two sides are firstly constructed, and after the anti-slide piles at two sides are poured for 7 days, the middle anti-slide pile is excavated and poured;

s5, reserving the anti-slide pile part connected with the connecting beam, and after the pile body below the connecting beam is poured for 7 days, starting to install connecting beam reinforcing steel bars and form erecting pouring. Adopting mechanical hole forming construction to construct a combined type slide-resistant pile;

and S6, arranging a monitoring device, namely an inclinometer, detecting the front row pile and one rear row pile of the middle roof truss type pile unit, tracking the monitoring effect, and performing comparative analysis.

In conclusion, the construction method of the combined type anti-slide pile structure adopts the roof trusses to arrange the combined type anti-slide piles, which are different from single-row piles or double-row piles, two rows of piles are connected into an integral arched structure through the connecting beams, the pile top displacement is effectively controlled, and the landslide thrust of the front row of piles and the rear row of piles is shared more reasonably; in the design process, the actual distribution condition of landslide thrust is considered to determine the pile length of the anti-slide pile, and the anti-slide pile is reasonable in design, safe and stable; based on the internet technology, the inclinometer is adopted to detect the deep displacement of the pile body and the sliding body, so that the stability of the landslide can be mastered in real time, and meanwhile, powerful data are provided for analyzing the control effect of the anti-slide pile.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 (1)

1. A construction method of a combined type slide-resistant pile structure is characterized by comprising the following steps: the specific operation is as follows:

s1, optimizing the design of the composite piles, reserving a construction platform on the slope easy to collapse, arranging the anti-slide piles in an arch shape, dividing the anti-slide piles into front and rear rows, connecting the piles with the piles through connecting beams, and forming a plurality of 'pin' type composite pile units on the whole, wherein the tops of the connecting beams are flush with the slope surface, and the 'pin' type composite pile units are as follows: forming two anti-slide piles into a V-shaped combination, transversely arranging three V-shaped combinations, and arranging a transverse anti-slide pile between two adjacent V-shaped combinations to form a combined pile after connection;

s2, because the slope body behind the pile is still easy to collapse, a retaining wall is arranged behind the pile and resists landslide thrust together with the anti-slide pile, the retaining wall is arranged along the connecting beam of the anti-slide pile behind, and the retaining wall foundation is deep below the elevation of the connecting beam;

s3, cutting the slope according to the original design slope rate, cleaning the slope surface from top to bottom, and cleaning loose soil and rocks on the slope surface without disturbing the stratum state of the slope;

s4, pile hole piles are formed by adopting a rotary drilling rig, a lengthened steel pile casing is matched, a hydraulic vibration hammer is adopted to drive into a rock stratum without wall protection, after one pile is poured for 7 days, holes can be drilled in adjacent pile holes, after the back row pile is poured, the front row pile is constructed, when the front row pile is constructed, pile holes of anti-slide piles at two sides are firstly constructed, and after the anti-slide piles at two sides are poured for 7 days, the middle anti-slide pile is excavated and poured;

s5, reserving the anti-slide pile part connected with the connecting beam, and after the pile body below the connecting beam is poured for 7 days, starting to install connecting beam reinforcing steel bars and form erecting pouring. Adopting mechanical hole forming construction to construct a combined type slide-resistant pile;

and S6, arranging a monitoring device, namely an inclinometer, detecting the front row pile and one rear row pile of the middle roof truss type pile unit, tracking the monitoring effect, and performing comparative analysis.

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