CN113463658A - Method for replacing, filling and removing obstacles of grabbing groove before construction of SMW construction method pile in stratum containing boulders - Google Patents
Method for replacing, filling and removing obstacles of grabbing groove before construction of SMW construction method pile in stratum containing boulders Download PDFInfo
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- CN113463658A CN113463658A CN202110770923.5A CN202110770923A CN113463658A CN 113463658 A CN113463658 A CN 113463658A CN 202110770923 A CN202110770923 A CN 202110770923A CN 113463658 A CN113463658 A CN 113463658A
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Images
Classifications
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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
- E02D17/06—Foundation trenches ditches or narrow shafts
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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
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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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
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/12—Back-filling of foundation trenches or ditches
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/025—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with scraper-buckets, dippers or shovels
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/22—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling
- E02F5/223—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling for back-filling
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
Abstract
The invention provides a grabbing groove replacement filling barrier removing method before construction of a pile in an SMW construction method for a stratum containing boulders, and relates to the technical field of grabbing groove replacement filling barrier removing. The method comprises the following steps: digging and forming a guide channel on the surface of a base layer along a preset track position of a pile needing to be subjected to an SMW construction method; crushing rock blocks or waste rainwater pipes in the soil layer below the guide channel; carrying out groove grabbing, replacing and filling treatment in the guide channel; after the replacement and filling are completed, preparing to carry out pile construction in an SMW method; by adopting the method, larger stones and waste rainwater pipes in the stratum are removed, the risk of collapse is reduced, good operation conditions are provided for the SMW construction method, the normal operation of the SMW construction method is ensured, and the good operation effect is achieved after the SMW construction method is finished; generally, the construction method is low in construction risk and high in safety, and is suitable for stratum obstacle clearing construction when construction of the pile is difficult due to the fact that stratum contains undetected large stones when the pile is constructed by the SMW construction method.
Description
Technical Field
The invention relates to the technical field of grabbing groove replacement and filling barrier removal, in particular to a grabbing groove replacement and filling barrier removal method before construction of a pile in an SMW (soil mixing wall) construction method for a stratum containing boulders.
Background
The SMW construction method is also called as a novel cement mixing pile wall, namely H-shaped steel and the like (mostly H-shaped steel, Larsen steel sheet piles, steel pipes and the like) are inserted into a cement pile to combine the bearing load with the seepage prevention and water retaining, so that the enclosure wall with a supporting structure with the functions of bearing force and seepage prevention is formed.
The support characteristics of SMW supporting construction mainly do: the cement-soil mixing pile has the advantages of basically no noise during construction, small influence on the surrounding environment and reliable structural strength, can be used in all occasions where the cement-soil mixing pile is applied, and is particularly suitable for soft strata mainly comprising clay and fine sand; the water retaining and seepage preventing performance is good, a water retaining curtain is not required to be additionally arranged, and the water retaining and seepage preventing device can be applied to a deeper foundation pit in cooperation with a plurality of supports; the construction method can replace the underground continuous wall as an underground enclosure under certain conditions, and if certain construction measures can be adopted to successfully recover materials such as H-shaped steel and the like, the cost is greatly lower than that of the underground continuous wall.
The SMW construction method is that a multi-shaft type drilling and digging mixer drills and digs at a certain depth on site, cement series reinforcer is sprayed out of a drill bit to be repeatedly mixed and stirred with foundation soil, overlapping construction is adopted among construction units, then H-shaped steel or steel plates are inserted into the cement soil mixture before the cement soil mixture is hardened to form a continuous and complete seamless underground wall body with certain strength and rigidity.
Before the SMW construction method is implemented, drilling needs to be carried out on the site at a certain depth, and the following problems exist at present:
1. designing the position of the pile in the SMW construction method according to geological detailed exploration and reconnaissance report conditions; if a large number of stone blocks with the diameter of more than 0.5m exist, the maximum grain diameter reaches 1.3m, the depth of the stone blocks is distributed between 3.8m and 6m, and DN1500 waste rainwater pipes exist at the construction positions of the construction method piles, the construction method piles cannot be directly constructed;
2. if a conventional filling and obstacle removing mode is adopted, the collapse risk exists, the site construction site is narrow, the linear distance between the construction method pile and the main road is only 2m, and slope-releasing excavation conditions are not provided.
Therefore, a proper construction method is needed to treat the boulder and ensure the construction safety.
Therefore, how to design a method for replacing, filling and clearing obstacles of a grabbing groove before pile construction in an SMW construction method of a stratum containing boulders is urgent to solve at present.
Disclosure of Invention
The invention aims to provide a method for replacing and filling a grabbing groove and clearing obstacles before pile construction in an SMW (soil mixing wall) construction method for a stratum containing boulders, which is used for clearing away larger stones and waste rainwater pipes in the stratum and reducing the risk of collapse, so that the SMW construction method is ensured to be smoothly carried out.
The embodiment of the invention is realized by the following steps:
the embodiment of the application provides a grabbing groove replacement and filling barrier removing method before construction of a pile by an SMW (soil mixing wall) construction method for a stratum containing boulders, which comprises the following steps:
digging and forming a guide channel on the surface of a base layer along a preset track position of a pile needing to be subjected to an SMW construction method;
crushing rock blocks or waste rainwater pipes in the soil layer below the guide channel;
carrying out groove grabbing and filling treatment at the bottom of the guide channel;
and (5) after the replacement and filling are finished, preparing to carry out the construction of the SMW construction method pile.
According to the technical scheme, firstly, a guide ditch is formed by digging at a preset track position of a pile needing to be subjected to the SMW construction method, broken stones or waste pipelines in a soil layer below the guide ditch are crushed, then the crushed stones or waste pipelines in the soil layer are discharged through groove grabbing and replacement, and then clay is filled again, so that the operation is finished; and good operation conditions are provided for the SMW construction method, so that the normal operation of the SMW construction method is ensured, and a good operation effect is achieved after the SMW construction method is completed.
In some embodiments of the present invention, after digging and forming the guide trench along the preset track position of the pile required to implement the SMW method, the method further includes:
and constructing the side walls on the two sides of the guide channel to form a guide wall. Through the technical scheme, the bearing capacity of the ground on two sides of the guide channel is enhanced.
In some embodiments of the present invention, before the breaking the rock blocks or the waste rain pipes in the soil layer below the guide trench, the method further comprises:
and drilling downwards along the soil layer at the bottom of the guide channel, and then forming a lead hole. Through the technical scheme, the hole leading means that before operation, the hole is punched at the reinforcing position at the bottom of the rainwater pipe by the rotary drilling drill, so that the hole breaks the artificial reinforcing layer to reach the silt layer, and the hole leading is formed, so that the hole leading device is convenient for mechanical operation for crushing block stones and pipelines, and can also achieve the effect of accurate positioning.
In some embodiments of the present invention, after drilling a hole downwards along the soil layer at the bottom of the guiding groove to form a guiding hole, the method further includes:
and crushing the rock blocks or the waste rainwater pipes in the soil layer below the guide channel through the guide holes. Through above-mentioned technical scheme to reach accurate location and broken stone and exhaust gas pipeline's effect.
In some embodiments of the present invention, when the groove grabbing and filling process is performed on the bottom of the guide channel, the method further includes:
and adopting a clay throwing and on-site slurry making mode, and backfilling by using clay immediately after the groove grabbing is finished. According to the technical scheme, in the process of grabbing the groove, in order to ensure the stability of two sides of the guide wall, the mud proportion is increased by adopting a method of throwing clay to make the mud on site, and the groove is grabbed and then timely backfilled by using the clay to avoid the phenomenon of collapse.
In some embodiments of the present invention, the method of excavating the guide trench in the surface of the substrate includes:
dividing a preset track on the surface of the base layer, and carrying out density detection on the base soil at the preset track; and excavating the foundation soil along a preset track by using an excavator to form a guide channel. Through the technical scheme, the guide channel is formed on the base layer.
In some embodiments of the present invention, the method for breaking rock blocks or waste rainwater pipes in the soil layer below the guide channel comprises:
and the rotary drill is used for extending into the soil layer through the guide hole so as to break the rock blocks or the waste rainwater pipes in the soil layer. Through the technical scheme, the aim of crushing the rock block and the waste gas pipeline is fulfilled.
In some embodiments of the present invention, the method for performing the groove grabbing and filling process on the bottom of the guide channel includes:
and (3) carrying out grooving treatment on the bottom end of the guide channel by using a grooving machine, excavating broken rock blocks or waste rainwater pipes out at the same time, and filling clay into the guide channel again. Through the technical scheme, the ground can reach the operation condition of the SMW construction method, and the normal implementation of the SMW construction method is ensured.
In some embodiments of the present invention, the width of the guide groove is 1.2 m. Through the technical scheme, the size of the device reaches the operation condition.
In some embodiments of the present invention, the depth of the guide channel is 1.5 m. Through the technical scheme, the size of the device reaches the operation condition.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects: firstly, digging and forming a guide channel at a preset track position of a pile needing to be subjected to an SMW construction method, crushing rock blocks and waste pipelines in a soil layer below the guide channel, grabbing a groove and replacing and filling, discharging the crushed rock blocks or waste pipelines in the soil layer, and then filling clay again to finish the operation; good operation conditions are provided for the SMW construction method, so that the normal operation of the SMW construction method is ensured, and a good operation effect is achieved after the SMW construction method is completed;
generally, the construction mode is low in construction risk and high in safety, and is suitable for removing obstacles in a stratum containing boulders under the conditions that the surrounding environment is complex, the construction site is limited and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic flow chart of a method in an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the formation of a guide channel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of rotary drilling to process rock blocks or waste pipelines in the embodiment of the invention;
FIG. 4 is a schematic diagram illustrating the operation of grabbing and replacing the slot of the trenching machine according to the embodiment of the present invention.
Icon: 1. and (4) a guide channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
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. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.
Examples
Referring to fig. 1-4, fig. 1 is a schematic flow chart of a method according to an embodiment of the invention; FIG. 2 is a schematic diagram illustrating the formation of a guide channel 1 according to an embodiment of the present invention; FIG. 3 is a schematic diagram of the operation of rotary drilling to process rock blocks or waste pipelines in the embodiment of the invention; FIG. 4 is a schematic diagram illustrating the operation of grabbing and replacing the slot of the trenching machine according to the embodiment of the present invention.
The embodiment provides a method for replacing, filling and removing obstacles by grabbing grooves before construction of an SMW construction method pile in a stratum containing boulders, which comprises the following steps:
s1, excavating along the preset track position of the pile needing to be subjected to the SMW construction method on the surface of the base layer and forming a guide channel 1;
s2, crushing stones or waste rainwater pipes in the soil layer below the guide channel 1;
s3, performing groove grabbing and filling treatment at the bottom of the guide channel 1;
and S4, completing the replacement and filling, and preparing to carry out the construction of the SMW construction method pile.
That is, when the SMW construction method needs to be performed and a large amount of stones with a diameter of more than 0.5m exist in a soil layer or waste rainwater pipes exist, a large gap will exist in the soil layer, which is not beneficial to the implementation of the SMW construction method, and also affects the actual effect after the SMW construction method is performed, so that the SMW construction method cannot achieve the expectation, and on the one hand, the purpose of reducing the cost can be achieved, and on the other hand, the feasibility and the implementation effect of the SMW construction method are greatly improved.
Firstly, excavating at a preset track position of a pile needing to be subjected to an SMW construction method, forming a guide ditch 1, crushing rock blocks and waste pipelines in a soil layer below the guide ditch 1, and discharging the crushed rock blocks or the waste pipelines in the soil layer through groove grabbing and replacement filling, and then filling clay again, thereby finishing the operation; and good operation conditions are provided for the SMW construction method, so that the normal operation of the SMW construction method is ensured, and a good operation effect is achieved after the SMW construction method is completed.
In this embodiment, after the pile is excavated and formed along the preset track position where the SMW construction method is to be performed, the method further includes:
and constructing the side walls of the two sides of the guide channel 1 to form a guide wall.
That is, guide walls are arranged on two end surfaces of the guide channel 1, so that the bearing capacity of the ground on two sides of the guide channel 1 is enhanced.
In this embodiment, before crushing the rock block or the waste rainwater pipe in the soil layer below the guide channel 1, the method further includes:
and drilling downwards along the soil layer at the bottom of the guide channel 1, and then forming a lead hole.
The hole leading is that before the operation, the hole is punched at the reinforcing position at the bottom of the rainwater pipe by a rotary drilling rig, so that the hole breaks through the manually-reinforced soil layer to reach the sludge layer.
The method saves reinforcing steel bars and concrete, reduces construction cost, can reduce the strength grade of the adopted concrete by 1-2 grades, can save the reinforcing steel bars by about 40 percent compared with a hammering method, has no noise, vibration and pollution during construction, has small interference to the surrounding environment, and is suitable for pile foundation engineering in soft soil areas, city centers or dense buildings and extension engineering of precise factories.
Through the formed guide hole, the mechanical operation for crushing the rock block and the pipeline is facilitated, and the effect of accurate positioning can be achieved.
In this embodiment, the bottom of the guiding groove 1 is drilled downwards along the soil layer to form a guiding hole, and the method further includes:
the guide holes crush the stones or waste rainwater pipes in the soil layer below the guide channel 1.
In this embodiment, when the groove catching and the filling and replacing process are performed on the bottom of the guide channel 1, the method further includes:
and adopting a clay throwing and on-site slurry making mode, and backfilling by using clay immediately after the groove grabbing is finished. In the process of grabbing the groove, in order to ensure the stability of two sides of the guide wall, the specific gravity of the slurry is increased by adopting a clay throwing and in-situ slurry making mode, and the groove is grabbed and then timely backfilled by using clay to avoid the phenomenon of collapse.
In the present embodiment, the method for excavating the guide trench 1 on the surface of the substrate includes:
dividing a preset track on the surface of the base layer, and carrying out density detection on the base soil at the preset track; the foundation soil is excavated along a predetermined trajectory using an excavator to form the guide trench 1.
In this embodiment, the method for crushing the rock block or the waste rainwater pipe in the soil layer below the guide channel 1 includes:
and the rotary drill is used for extending into the soil layer through the guide hole so as to break the rock blocks or the waste rainwater pipes in the soil layer.
In this embodiment, the method for performing the groove grabbing and filling process on the bottom of the guide channel 1 includes:
and (3) carrying out grooving treatment on the bottom end of the guide channel 1 by using a grooving machine, excavating broken rock blocks or waste rainwater pipes, and filling clay into the guide channel 1 again.
After the hydraulic grab bucket wall-grooving machine is positioned, the grab bucket is parallel to the inner side surface of the guide wall, and when the grab bucket is lowered, the grab bucket automatically falls into the guide wall, so that strong pushing is not allowed, and the grooving precision is ensured.
The grab bucket filled with the soil is slightly stopped when lifted to the top surface of the guide wall, and is lifted to a temporary soil piling field after the slurry on the grab bucket is completely drained so as to prevent the slurry from polluting the field. Soil falling on the guide wall is cleared to the outside of the slotted hole, and is strictly forbidden to be shoveled into the slotted hole.
In the process of digging soil by the grab bucket, the upper lifting speed and the lower lifting speed are slowly carried out, the grab bucket is closed and put down, and the grab bucket is opened again during digging so as to avoid eddy current scouring of the wall of the bucket and causing hole collapse.
When the grab bucket is placed down for digging, the center of the grab bucket is aligned with the hole site center marker placed on the guide wall and is placed down along the outer side wall of the guide wall, and the correct digging position is ensured.
In the process of grabbing the groove, in order to keep the stability of the wall of the excavated groove, clay is adopted for making slurry on site, and the groove grabbing operation is carried out after clay is thrown and extruded. The mud proportion and the water head are ensured, and hole collapse is prevented.
As the grabbing groove area is a massive stone layer, certain instability is achieved, and the influence of sediment thickness is not considered when the SMW construction method pile is constructed after the grabbing groove is replaced and filled. Therefore, a slurry of large specific gravity is used. And the slurry is backfilled by adopting a clay slurry making mode, so that the stability of the tank wall is ensured.
In the present embodiment, the width of the guide groove 1 is 1.2 m.
In this embodiment, the depth of the guide groove 1 is 1.5 m.
Of course, the depth of the width of the guide channel 1 may be other dimensions, depending on the implementation environment.
In this embodiment, the ratio of the slurry to be slurried in situ is suitably increased to maintain the pit wall stable. Generally, the construction mode has small construction risk and high safety.
The construction mode is suitable for the obstacle removing construction of the stratum containing the boulders under the conditions that the surrounding environment is complex, the construction site is limited and the like.
The mode can exert absolute advantages in the environments with dense buildings, large traffic flow of people flow, narrow construction sites and the like. Since in this environment, collapse is very likely to occur if the barrier is removed directly.
And (4) removing obstacles on the block stones at the pile positions in the construction method by adopting a groove grabbing and filling mode of a grooving machine according to the determination of the piles in the construction method. Firstly constructing a guide wall, crushing the rock block by adopting a rotary drilling pilot hole, and finally grabbing the groove for replacement and filling by adopting a grooving machine, wherein in the process of grabbing the groove, in order to ensure the stability of two sides of a groove of the guide wall, a clay throwing in-situ slurry making mode is adopted, so that the specific gravity of slurry is increased. And backfilling with clay in time after the groove grabbing is finished.
The method comprises the steps of adopting machinery to excavate a guide wall groove, constructing in rainy days, excavating the guide wall groove in sections, excavating one section to pour one section, excavating a drainage ditch or an earth dike at two side walls of a foundation trench to prevent ground rainwater from flowing into the guide wall groove, and frequently checking side slopes and supporting conditions to prevent the pit wall from collapsing due to water immersion.
Before the construction of the guide wall, underground pipelines in the excavation range are carefully explored, mechanical excavation can be used when no underground pipeline exists, and otherwise, manual excavation is adopted.
Removing obstacles in the range of the piles in the construction method during the construction of the guide wall, and enabling the wall to fall on undisturbed soil; the guide wall concrete must be poured compactly, the strength of the side wall concrete must reach 10Mpa when the mould is removed, and a wall back soil body can be backfilled after wood supports with the horizontal spacing of 2m are arranged between walls, so as to prevent the wall body from cracking and deforming; the backfill behind the wall back adopts clay for layered tamping, and the backfill is symmetrically carried out on the inner side and the outer side, so that the displacement of the wall body is prevented; after the guide wall is constructed, the heavy machinery is prevented from operating or stopping near the guide wall.
The working principle of the grabbing groove replacement filling barrier removing method before the SMW construction method of the stratum containing the boulders is as follows: firstly, digging and forming a guide ditch 1 at a preset track position of a pile needing to be subjected to an SMW construction method, crushing rock blocks and waste pipelines in a soil layer below the guide ditch 1, and discharging the crushed rock blocks or the waste pipelines in the soil layer through grabbing a groove and replacing and filling so as to re-fill clay, thereby finishing the operation; and good operation conditions are provided for the SMW construction method.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A method for replacing, filling and removing barriers of a grabbing groove before construction of a pile in an SMW construction method of a stratum containing boulders is characterized by comprising the following steps:
digging and forming a guide channel on the surface of a base layer along a preset track position of a pile needing to be subjected to an SMW construction method;
crushing rock blocks or waste rainwater pipes in the soil layer below the guide channel;
carrying out groove grabbing and filling treatment in the guide channel;
and (5) after the replacement and filling are finished, preparing to carry out the construction of the SMW construction method pile.
2. The method for replacing, filling and removing the obstacles of the grabbing groove before the construction of the SMW construction method pile in the stratum containing the boulder as claimed in claim 1, is characterized in that after digging along the preset track position of the pile needing to be implemented by the SMW construction method and forming the guide channel, the method further comprises the following steps:
and constructing the side walls on the two sides of the guide channel to form a guide wall.
3. The method for replacing, filling and removing the obstacles in the grabbing groove before the construction of the SMW pile in the stratum containing the boulders as claimed in claim 1, is characterized by further comprising the following steps before crushing the boulders or the waste rainwater pipe in the soil layer below the guide channel:
and drilling downwards along the soil layer at the bottom of the guide channel, and then forming a lead hole.
4. The method for replacing, filling and removing the obstacles of the grabbing groove before the construction of the SMW-method pile in the stratum containing the boulders, as claimed in claim 3, is characterized in that after the bottom of the guide channel is drilled downwards along the soil layer to form a guide hole, the method further comprises the following steps:
and crushing the rock blocks or the waste rainwater pipes in the soil layer below the guide channel through the guide holes.
5. The method for replacing, filling and removing the obstacles in the grabbing groove before the construction of the pile by the SMW construction method of the stratum containing the boulders as claimed in claim 1, is characterized by further comprising the following steps of when the grabbing groove and the replacing and filling treatment are carried out on the bottom of the guide channel:
and (3) adopting a clay throwing in-situ slurry making mode, and backfilling with clay immediately after the groove grabbing is finished.
6. The method for replacing, filling and clearing the obstacle before constructing the pile by the SMW method for the stratum containing the boulder as claimed in claim 1, wherein the method for excavating the guide channel on the surface of the base layer comprises the following steps:
dividing the preset track on the surface of the base layer, and carrying out density detection on the base soil at the preset track; and excavating foundation soil along the preset track by utilizing an excavator to form the guide channel.
7. The method for replacing, filling and removing the obstacles of the grabbing groove before the construction of the SMW-process pile in the stratum containing the boulders as claimed in claim 1, wherein the method for crushing the boulders or the waste rainwater pipes in the soil layer below the guide channel comprises the following steps:
and the rotary drill is used for extending into the soil layer through the guide hole so as to break the rock blocks or the waste rainwater pipes in the soil layer.
8. The method for replacing, filling and removing the obstacles of the grabbing groove before the construction of the pile by the SMW construction method of the stratum containing the boulders as claimed in claim 1, wherein the method for grabbing the groove and replacing and filling in the guide channel comprises the following steps:
and (3) carrying out grooving treatment on the bottom end of the guide channel by using a grooving machine, excavating broken rock blocks or waste rainwater pipes out at the same time, and filling clay into the guide channel again.
9. The method for replacing, filling and removing the obstacles in the grabbing groove before the construction of the SMW-process pile in the stratum containing the boulders as claimed in claim 1, wherein the width of the guide channel is 1.2 m.
10. The method for replacing, filling and removing the obstacles in the grabbing groove before the construction of the pile by the SMW method for the stratum containing the boulders as claimed in claim 1, wherein the depth of the guide channel is 1.5 m.
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| CN202110770923.5A CN113463658A (en) | 2021-07-07 | 2021-07-07 | Method for replacing, filling and removing obstacles of grabbing groove before construction of SMW construction method pile in stratum containing boulders |
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