CN110777815B - Multistage high-strength rock slope cutting construction method - Google Patents
Multistage high-strength rock slope cutting construction method Download PDFInfo
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- CN110777815B CN110777815B CN201910926869.1A CN201910926869A CN110777815B CN 110777815 B CN110777815 B CN 110777815B CN 201910926869 A CN201910926869 A CN 201910926869A CN 110777815 B CN110777815 B CN 110777815B
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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Abstract
The invention discloses a multistage high-strength rock slope cutting construction method, which comprises the following steps: s1: constructing a protective bent frame, namely building the protective bent frame at the slope bottoms of the first, second and third grade slopes before construction; s2: constructing an anchoring area, namely anchoring the third-level side slope by adopting an anchor rope, and supporting the second-level side slope by adopting a deep anchor rod; s3: constructing a static cutting area, namely performing static cutting on the slope toe of the first-stage side slope and the second-stage side slope, hoisting and transporting the cut stones block by block to form an upper mechanical breaking construction space and a lower slag discharging transportation space; s4: constructing a mechanical breaking area, namely performing mechanical chiseling construction on the residual side slope after static cutting to break the residual rock mass; s5: and (5) carrying out net hanging construction, namely removing scattered rock masses on the side slope and carrying out net hanging construction. The construction method can ensure the economy, safety and high efficiency of the slope cutting construction of the multistage high-strength rock slope.
Description
Technical Field
The invention relates to the technical field of roadbed construction. More specifically, the invention relates to a multistage high-strength rock slope cutting construction method.
Background
At present, expressways built in early days are in a condition of saturated traffic, traffic accidents are increased gradually, and reconstruction and expansion of old expressways are imminent. When the highway is subjected to high-strength rocky slope widening construction in reconstruction and extension, blasting and mechanical chiseling are usually adopted to carry out slope cutting construction on the whole slope in the traditional construction, so that the engineering quantity is large; the blasting construction is adopted, the traffic is necessarily interrupted, and potential safety hazards exist; the use of a single cutting or gas fracturing process is cost prohibitive and inefficient. The use of mechanical chiseling, which requires traffic closure, is also inefficient.
Disclosure of Invention
The invention aims to provide a multistage high-strength rock slope cutting construction method which ensures economy, safety and high efficiency of multistage high-strength rock slope cutting construction.
To achieve these objects and other advantages in accordance with the present invention, there is provided a multistage high-strength rocky slope cutting construction method, comprising the steps of:
s1: constructing a protective bent frame, namely building the protective bent frame at the slope bottoms of the first, second and third grade slopes before construction;
s2: constructing an anchoring area, namely anchoring the third-level side slope by adopting an anchor rope, and supporting the second-level side slope by adopting a deep anchor rod;
s3: constructing a static cutting area, namely performing static cutting on the slope toe of the first-stage side slope and the second-stage side slope, hoisting and transporting the cut stones block by block to form an upper mechanical breaking construction space and a lower slag discharging transportation space;
s4: constructing a mechanical breaking area, namely performing mechanical chiseling construction on the residual side slope after static cutting to break the residual rock mass;
s5: and (5) carrying out net hanging construction, namely removing scattered rock masses on the side slope and carrying out net hanging construction.
Preferably, the secondary slope deep anchor bolt support construction in the step S2 includes the following specific steps:
s21: drilling a stepped pore channel inwards perpendicular to the secondary side slope, wherein the pore channel is a shallow hole at the upper part and a deep hole at the lower part;
s22: the anchor backing plate is arranged at the step of the pore channel;
s23: the lengthened screw rod is connected with the finish rolling deformed steel bar anchor rod, and the finish rolling deformed steel bar anchor rod penetrates through the anchor backing plate and is positioned in the deep hole through the center-penetrating jack;
s24: removing the through jack and the lengthened screw rod, and pouring concrete in the deep hole to anchor the finish-rolled deformed steel bar anchor rod in the deep hole;
s25: and repeating the steps along the secondary side slope to finish the anchoring of the plurality of finish rolling deformed steel bar anchor rods.
Preferably, the step S5 of hanging the net further includes a slope support construction before the construction, which includes the following steps:
the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom;
step two: a plurality of pile foundations are arranged at intervals along the length direction of the slope bottom of the side slope, and protection plates are fixed on the side, close to the side slope, of the pile foundations and are parallel to the protection bent frames;
step three: erecting a pair of templates at two sides of the protection plate, placing the scattered rock mass in a space formed by the pair of templates, the protection plate and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall which is formed by uniformly distributing the scattered rock mass in the concrete;
step four: a plurality of protection supporting rods are arranged between the pile foundation and the side slope above the protection wall.
Preferably, the pile foundation includes the pile foundation in the end and connects the pile foundation, it is greater than the pile foundation in the end and connects the pile foundation bottom and upwards sunken have the diameter to slightly be greater than the concave passageway of pile foundation in the end to connect the pile foundation, it fits on the pile foundation in the end through concave passageway to connect the pile foundation, the guard plate is integrated into one piece's two parts, forms the L type, and the step of guard plate is blocked in connecting pile foundation bottom department and the guard plate closely pastes the pile foundation in the end and is connected the pile foundation setting just.
Preferably, the protection plate and the outer side of the connection pile foundation are clamped through a clamp.
Preferably, the height of the protection wall is equal to that of the protection plate, and the specific construction comprises the following steps:
the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom;
step two: arranging a plurality of bottom pile foundations at intervals along the length direction of the slope bottom of the side slope, sleeving connecting pile foundations on the plurality of bottom pile foundations, clamping a protection plate at the bottom pile foundations and the connecting pile foundations, wherein the protection plate is parallel to the protection bent frame, and clamping a clamp at the outer sides of the protection plate and the connecting pile foundations;
step three: erecting a pair of templates at two sides of the protection plate, placing the scattered rock mass in a space formed by the pair of templates, the protection plate and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall which is formed by uniformly distributing the scattered rock mass in the concrete;
step four: and a plurality of protection supporting rods are arranged between the connecting pile foundation and the side slope above the protection wall.
Preferably, the height of the protection wall is equal to the height of the protection plate at the step, and the specific construction comprises the following steps:
the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom;
step two: a plurality of bottom pile foundations are arranged at intervals along the length direction of the slope bottom of the side slope, a protection plate is fixed on the bottom pile foundations and is parallel to the protection bent frame;
step three: erecting a pair of templates at two sides of the protection plate, placing the scattered rock mass in a space formed by the pair of templates, the protection plate and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall which is formed by uniformly distributing the scattered rock mass in the concrete;
step four: the pile foundation is established to the cover between the guard plate on the end pile foundation to establish the clamp at the guard plate with the card in the connection pile foundation outside, then set up many protection branch between the connection pile foundation of guard wall top and side slope.
Preferably, the connection pile foundation is provided with a plurality of concave holes, one end of the protection supporting rod is anchored in the first-stage side slope, and the other end of the protection supporting rod is clamped in the concave holes.
Preferably, the end of the lengthened screw rod is a steel pipe with an internal thread, and the finish-rolled deformed steel anchor rod is a rod body with an external thread at the end, and the two are connected through the end thread.
The invention at least comprises the following beneficial effects:
the construction method is economical and efficient, the construction speed is accelerated, the limitation of a single excavation process is overcome, and the construction method has a remarkable effect on slope cutting construction of the road-related multistage high-strength hard rock slope.
The method is safe and reliable. The top of the slope is supported by a prestressed anchor cable and an anchor rod, so that the stability of the slope after slope cutting is improved. And a prestressed deep anchor rod is adopted for supporting, and the construction is safe after the supporting and the excavation are carried out.
② the economy is good. Compared with a single slope cutting process, the slope cutting process adopts a combined technology, so that the construction period and the cost investment are saved, and the economical efficiency is outstanding.
And thirdly, the operability is strong. The combination technology adopts mature construction technology and has strong operability.
And fourthly, the influence on the periphery is small. And the combined process is adopted for construction, so that blasting construction is avoided, and the operation of the existing expressway is not influenced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the construction of step S1 of the present invention;
FIG. 2 is a schematic view of the construction of step S2 according to the present invention;
FIG. 3 is a schematic view of the present invention in step S3;
FIG. 4 is a schematic view of the construction of step S4 according to the present invention;
FIG. 5 is a schematic illustration of the construction of the anchor in the construction step S2 according to the present invention;
FIG. 6 is a schematic view of the position of the slope support construction of the present invention;
FIG. 7 is an enlarged schematic view of the slope support construction of the present invention;
fig. 8 is another enlarged view of the slope support construction of the present invention.
Description of reference numerals:
1. protection framed bent, 2, anchor rope, 3, stock, 4, mechanical demolition construction space, 5, slag transportation space, 6, mechanical demolition district, 31, shallow hole, 32, deep hole, 33, finish rolling screw-thread steel stock, 34, anchor backing plate, 35, punching jack, 36, extension screw, 61, end pile base, 62, connection pile foundation, 63, guard plate, 64, clamp, 65, protective wall, 66, protection branch.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 4, the invention provides a multistage high-strength rock slope cutting construction method, which comprises the following steps: s1: constructing a protection bent frame 1, and building the protection bent frame 1 at the slope bottoms of the first, second and third grade slopes before construction; s2: constructing an anchoring area, namely anchoring the third-level side slope by adopting an anchor rope 2, and supporting the second-level side slope by adopting a deep anchor rod 3; s3: constructing a static cutting area, namely performing static cutting on the slope toe of the first-stage side slope and the second-stage side slope, hoisting and transporting the cut stones block by block to form an upper mechanical breaking construction space 4 and a lower slag transport space 5; s4: constructing a mechanical breaking area 6, namely performing mechanical chiseling construction on the residual side slope after static cutting to break the residual rock mass; s5: and (5) carrying out net hanging construction, namely removing scattered rock masses on the side slope and carrying out net hanging construction.
In the technical scheme, the construction method mainly comprises the steps of anchor cable 2 and anchor rod 3 supporting (bolting), static cutting (cut) and mechanical breaking (machine) combination, and is called BCM combination process for short. The process is divided into anchoring areas according to construction areas: anchor cable 2 is adopted to anchor tertiary side slope, and deep stock 3 is adopted to support secondary side slope, increases the stability of side slope superstructure. Static force cutting area: and (3) performing static cutting on the slope toe of the second-level slope and the first-level slope by using a cutting machine, and conveying the cut stones out to form an upper mechanical breaking construction space 4 and a lower slag discharging transportation space 5. Mechanical breaking area 6: after the channel is opened, the residual side slope after static force cutting is constructed by matching an excavator with a hydraulic breaking hammer through increasing equipment investment, and the residual side slope is broken.
As shown in fig. 5, the secondary slope deep anchor bolt support construction in step S2 includes the following specific steps: s21: a step-shaped pore channel is drilled inwards perpendicular to the secondary side slope, and the pore channel is a shallow hole 31 at the upper part and a deep hole 32 at the lower part respectively; s22: the anchor backing plate 34 is arranged at the step of the hole; s23: the lengthened screw rod 36 is connected with the finish-rolled deformed steel bar anchor rod 33, and the finish-rolled deformed steel bar anchor rod 33 penetrates through the anchor backing plate 34 and is positioned in the deep hole 32 through the center-through jack 35; s24: dismantling the through jack 35 and the lengthened screw rod 36, and pouring concrete in the deep hole 32 to anchor the finish-rolled deformed steel bar anchor rod 33 in the deep hole 32; s25: and repeating the steps along the secondary side slope to complete the anchoring of the plurality of finish rolling deformed steel bar anchor rods 33.
In the technical scheme, two drilling machines with different apertures are adopted, firstly, shallow holes 31 are drilled, then deep holes 32 are drilled, the anchoring position and the design of an anchor backing plate 34 are kept unchanged, the anchor backing plate is connected with a finish rolling deformed steel anchor rod 33 through an extension screw rod 36, and the extension screw rod 36 is removed after tensioning and locking.
As shown in fig. 6 to 8, in another technical solution, before the step S5 of hanging net construction, a slope support construction is further included, which includes the following steps: the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom; step two: a plurality of pile foundations are arranged at intervals along the length direction at the bottom of the side slope, and protection plates 63 are fixed on the side, close to the side slope, of the pile foundations and are parallel to the protection bent frames 1; step three: erecting a pair of templates at two sides of the protection plate 63, placing the scattered rock mass in a space formed by the pair of templates, the protection plate 63 and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall 65 which is formed by uniformly distributing the scattered rock mass in the concrete; step four: a plurality of protection struts 66 are arranged between the pile foundation and the side slope above the protection wall 65.
In above-mentioned technical scheme, in order to guarantee the stability of side slope, occupy the new highway space that a bit was excavated and carry out the side slope support construction, the pile foundation is very close apart from the side slope, and guard plate 63 sets up to be stably fixed in on the pile foundation and guard plate 63 will break up the rock isolated to the side slope bottom. Set up interim template and be used for concreting to form protecting wall 65, the stability of the multiplicable side slope of protecting wall 65's setting, what utilized simultaneously is the loose broken rock, has reduced the cost of transportation processing loose broken rock. When concrete is poured, the concrete is poured and stirred at the same time, so that the loose rock is uniformly distributed in the concrete, and the overall stability of the protective wall 65 is better. The quantity of the broken rock is limited, and protective wall 65 sets up too high cost increase and the efficiency of construction reduces, is unfavorable for the process of whole construction, consequently sets up at the bottom at protective wall 65, and accomplishes the back, sets up protection branch 66 on the one-level slope on protective wall 65 upper strata and protects.
In another kind of technical scheme, the pile foundation includes end pile foundation 61 and connection pile foundation 62, connection pile foundation 62 diameter is greater than end pile foundation 61 and connects pile foundation 62 bottom upwards sunken have the diameter slightly to be greater than the concave passageway of end pile foundation 61, connection pile foundation 62 cooperates on end pile foundation 61 through concave passageway, protection plate 63 is integrated into one piece's two parts, forms the L type, and protection plate 63's step is blocked in connection pile foundation 62 bottom department and protection plate 63 hugs closely end pile foundation 61 and connection pile foundation 62 setting just. The protection plate 63 and the outer side of the connecting pile foundation 62 are clamped through a clamp 64.
In above-mentioned technical scheme, the pile foundation comprises two parts, and the pile foundation 61 is shorter on the one hand, and convenient construction connects the pile foundation 62 prefabricated back direct assembly can, improves the efficiency of construction, reduces the construction degree of difficulty, and on the other hand, the pile foundation can also play the effect of protection framed bent when follow-up needs continue to cut the slope. The protection plate 63 is blocked in the position of the pile foundation 61 and the connection pile foundation 62, and is clamped through the clamp 64, and the protection plate 63 does not need to be fixed in other fixing modes.
In another technical scheme, the height of the protective wall 65 is equal to that of the protective plate 63, and the specific construction comprises the following steps: the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom; step two: arranging a plurality of bottom pile foundations 61 at intervals along the length direction of the slope bottom of the side slope, sleeving connecting pile foundations 62 on the plurality of bottom pile foundations 61, clamping a protection plate 63 at the positions of the bottom pile foundations 61 and the connecting pile foundations 62, enabling the protection plate 63 to be parallel to the protection bent frame, and clamping a clamp 64 outside the protection plate 63 and the connecting pile foundations 62; step three: erecting a pair of templates at two sides of the protection plate 63, placing the scattered rock mass in a space formed by the pair of templates, the protection plate 63 and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall 65 which is formed by uniformly distributing the scattered rock mass in the concrete; step four: a plurality of protection struts 66 are arranged above the protection wall 65 between the connection pile foundation 62 and the side slope. As shown in fig. 7, the protection plate 63 has the same height as the formed protection wall 65, and the stability is higher.
In another technical scheme, the height of the protection wall 65 is equal to the height of the protection plate 63 at the step, and the specific construction comprises the following steps: the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom; step two: a plurality of bottom pile foundations 61 are arranged at intervals along the length direction of the slope bottom of the side slope, a protection plate 63 is fixed on the bottom pile foundations 61, and the protection plate 63 is parallel to the protection bent frame; step three: erecting a pair of templates at two sides of the protection plate 63, placing the scattered rock mass in a space formed by the pair of templates, the protection plate 63 and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall 65 which is formed by uniformly distributing the scattered rock mass in the concrete; step four: the connecting pile foundation 62 is sleeved between the protection plates 63 on the bottom pile foundation 61, the clamp 64 is clamped between the protection plates 63 and the outer sides of the connecting pile foundation 62, and then a plurality of protection supporting rods 66 are arranged between the connecting pile foundation 62 above the protection wall 65 and the side slope. As shown in fig. 8, if the connection pile foundation 62 is set up at the beginning, it is inevitably inconvenient to construct the protective wall 65, so that by the above construction method, the protective wall 65 is set to be shorter, which can meet the requirement of slope stability, and also can facilitate the construction of the protective wall 65, and the connection pile foundation 62 is assembled and the protective support rod 66 is set after the construction of the protective wall 65 is completed.
In another technical scheme, a plurality of concave holes are formed in the connecting pile foundation 62, one end of the protective support rod 66 is anchored in the first-stage side slope, and the other end of the protective support rod is clamped in the concave holes.
In another technical solution, the end of the extension screw 36 is a steel pipe with an internal thread, and the finish-rolled deformed steel anchor 33 is a rod with an external thread at the end, and the two are connected by the end thread. The connection strength between the lengthened screw rod 36 and the finish-rolled deformed steel anchor rod 33 is required to meet the anti-pulling requirement.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A multistage high-strength rock slope cutting construction method is characterized by comprising the following steps:
s1: constructing a protective bent frame, namely building the protective bent frame at the slope bottoms of the first, second and third grade slopes before construction;
s2: constructing an anchoring area, namely anchoring the third-level side slope by adopting an anchor rope, and supporting the second-level side slope by adopting a deep anchor rod;
s3: constructing a static cutting area, namely performing static cutting on the slope toe of the first-stage side slope and the second-stage side slope, hoisting and transporting the cut stones block by block to form an upper mechanical breaking construction space and a lower slag discharging transportation space;
s4: constructing a mechanical breaking area, namely performing mechanical chiseling construction on the residual side slope after static cutting to break the residual rock mass;
s5: carrying out net hanging construction, namely removing scattered rock mass on the side slope and carrying out net hanging construction;
the concrete steps of the secondary side slope deep anchor rod support construction in the step S2 are as follows:
s21: drilling a stepped pore channel inwards perpendicular to the secondary side slope, wherein the pore channel is a shallow hole at the upper part and a deep hole at the lower part;
s22: the anchor backing plate is arranged at the step of the pore channel;
s23: the lengthened screw rod is connected with the finish rolling deformed steel bar anchor rod, and the finish rolling deformed steel bar anchor rod penetrates through the anchor backing plate and is positioned in the deep hole through the center-penetrating jack;
s24: removing the through jack and the lengthened screw rod, and pouring concrete in the deep hole to anchor the finish-rolled deformed steel bar anchor rod in the deep hole;
s25: and repeating the steps along the secondary side slope to finish the anchoring of the plurality of finish rolling deformed steel bar anchor rods.
2. The multistage high-strength rock slope cutting construction method as claimed in claim 1, wherein before the step S5 of netting construction, slope support construction is further included, which includes the following steps:
the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom;
step two: a plurality of pile foundations are arranged at intervals along the length direction of the slope bottom of the side slope, and protection plates are fixed on the side, close to the side slope, of the pile foundations and are parallel to the protection bent frames;
step three: erecting a pair of templates at two sides of the protection plate, placing the scattered rock mass in a space formed by the pair of templates, the protection plate and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall which is formed by uniformly distributing the scattered rock mass in the concrete;
step four: a plurality of protection supporting rods are arranged between the pile foundation and the side slope above the protection wall.
3. The multistage high-strength rock slope cutting construction method according to claim 2, wherein the pile foundation comprises a bottom pile foundation and a connecting pile foundation, the connecting pile foundation is larger in diameter than the bottom pile foundation, the bottom end of the connecting pile foundation is upwards recessed to form a concave channel, the diameter of the concave channel is slightly larger than that of the bottom pile foundation, the connecting pile foundation is matched with the bottom pile foundation through the concave channel, the protection plate is integrally formed into two parts to form an L shape, the step of the protection plate is just clamped at the bottom end of the connecting pile foundation, and the protection plate is tightly attached to the bottom pile foundation and the connecting pile foundation.
4. The multistage high-strength rock slope cutting construction method according to claim 3, wherein the protection plate and the outer side of the connection pile foundation are clamped tightly through a clamp.
5. The multistage high-strength rock slope cutting construction method as claimed in claim 4, wherein the protection wall and the protection plate are equal in height, and the concrete construction comprises the following steps:
the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom;
step two: arranging a plurality of bottom pile foundations at intervals along the length direction of the slope bottom of the side slope, sleeving connecting pile foundations on the plurality of bottom pile foundations, clamping a protection plate at the bottom pile foundations and the connecting pile foundations, wherein the protection plate is parallel to the protection bent frame, and clamping a clamp at the outer sides of the protection plate and the connecting pile foundations;
step three: erecting a pair of templates at two sides of the protection plate, placing the scattered rock mass in a space formed by the pair of templates, the protection plate and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall which is formed by uniformly distributing the scattered rock mass in the concrete;
step four: and a plurality of protection supporting rods are arranged between the connecting pile foundation and the side slope above the protection wall.
6. The multistage high-strength rock slope cutting construction method as claimed in claim 4, wherein the height of the protection wall is equal to the height of the protection plate at the step, and the concrete construction comprises the following steps:
the method comprises the following steps: cleaning the scattered rock mass on the side slope and stacking the rock mass close to the first-stage side slope at the slope bottom;
step two: a plurality of bottom pile foundations are arranged at intervals along the length direction of the slope bottom of the side slope, a protection plate is fixed on the bottom pile foundations and is parallel to the protection bent frame;
step three: erecting a pair of templates at two sides of the protection plate, placing the scattered rock mass in a space formed by the pair of templates, the protection plate and the side slope, pouring concrete, and removing the pair of templates after concrete curing is finished to form a bottom protection wall which is formed by uniformly distributing the scattered rock mass in the concrete;
step four: the pile foundation is established to the cover between the guard plate on the end pile foundation to establish the clamp at the guard plate with the card in the connection pile foundation outside, then set up many protection branch between the connection pile foundation of guard wall top and side slope.
7. The multistage high-strength rock slope cutting construction method according to claim 3, wherein a plurality of concave holes are formed in the connection pile foundation, one end of the protection support rod is anchored in the first-stage slope, and the other end of the protection support rod is clamped in the concave holes.
8. The multistage high-strength rock slope cutting construction method as claimed in claim 1, wherein the end of the lengthened screw rod is a steel pipe with internal threads, the end of the finish-rolled deformed steel bar anchor rod is a rod body with external threads, and the two are connected through end threads.
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Effective date of registration: 20220218 Address after: 430048 No. 11 Jinyinhu Road, Dongxihu District, Wuhan City, Hubei Province Patentee after: CCCC SECOND HARBOR ENGINEERING Co.,Ltd. Patentee after: CCCC Wuhan harbor engineering design and Research Institute Co., Ltd Address before: 430048 No. 11 Jinyinhu Road, Dongxihu District, Wuhan City, Hubei Province Patentee before: CCCC SECOND HARBOR ENGINEERING Co.,Ltd. |