CN217651802U - Compound anchor rope supporting construction of double round milling cement soil wall - Google Patents
Compound anchor rope supporting construction of double round milling cement soil wall Download PDFInfo
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- CN217651802U CN217651802U CN202220937337.5U CN202220937337U CN217651802U CN 217651802 U CN217651802 U CN 217651802U CN 202220937337 U CN202220937337 U CN 202220937337U CN 217651802 U CN217651802 U CN 217651802U
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Abstract
The utility model discloses a double round mills cement soil wall composite anchor rope supporting structure, including the rectangular double round mills cement soil cut-off wall, the I-steel has been inserted at the interval in the double round mills cement soil cut-off wall, has constructed the ring roof beam around the double round mills cement soil cut-off wall at the double round mills cement soil cut-off wall top and on the double round mills cement soil cut-off wall inner wall, has constructed the vertical tie beam between each ring roof beam adjacent from top to bottom; and arranging an outer side supporting structure unit consisting of a horizontal connecting beam and a vertical foundation pile on the outer side of the ring beam at the top of the double-wheel milling cemented soil impervious wall, and arranging anchor cables on the ring beam on the inner wall of the double-wheel milling cemented soil impervious wall at equal intervals along the length direction of the ring beam. The composite support structure is stable, can effectively support the foundation pit of the foundation with the strong permeable layer, and ensures the safety of the construction process of excavating the foundation pit and the underground structure.
Description
Technical Field
The utility model belongs to the technical field of the excavation supporting, concretely relates to compound anchor rope supporting construction of cement-soil wall is milled to double round.
Background
The foundation pit supporting structure system generally comprises two parts, namely a soil retaining structure and a precipitation and water stopping system. Pile and wall type supporting structures often adopt steel sheet piles, reinforced concrete sheet piles, column-column type cast-in-place piles, underground continuous walls and the like. According to soil conditions and the size of a foundation pit, the foundation pit can be designed to be cantilever type, inner support type or anchor type. The gravity type supporting structure mostly adopts a cement soil mixing pile retaining wall, a soil nailing wall and the like. When the supporting structure can not play the role of water stop, a water stop curtain can be arranged or precipitation outside the pit is adopted at the same time so as to achieve the purpose of controlling underground water, so that the foundation pit earthwork engineering can be excavated under the dry operation condition.
Although the sheet pile type supporting structure can be suitable for various stratums, the process requirement is very high due to the adoption of the pile and wall type supporting structures in the highly permeable stratums, and the construction effect of the anti-seepage and water-stop curtain needs to be enhanced, so that the construction cost is increased rapidly. The underground continuous wall supporting system can be used for a foundation pit supporting structure of a strongly permeable stratum, but the construction cost is very high for a foundation pit of which the supporting structure is only temporarily supported, and the construction investment is not favorably controlled. Cement mixing pile retaining wall, high pressure jet grouting pile retaining wall and other gravity type retaining walls. The wall mainly bears pressure, generally does not bear tensile force, and when soil conditions are poor, the excavation depth of the foundation pit is not too large, so that the wall is suitable for small foundation pit engineering. When the soil quality condition is better, the cement soil stirring process is limited in use.
The technology of double-wheel milling deep mixing wall is a novel construction method, and double-wheel milling deep mixing equipment comprises two types: the guide rod type double-wheel milling deep layer stirring equipment can achieve a digging and stirring depth of 45m, and the suspended type double-wheel milling deep layer stirring equipment can achieve a digging and stirring depth of 65m.
The double-wheel milling deep-layer stirring impervious wall is formed by combining the technical characteristics of a hydraulic double-wheel slot milling machine and the traditional deep-layer stirring, and in the process of tunneling grouting, air supply, milling, cutting and stirring, the two milling wheels oppositely rotate to mill a stratum; meanwhile, downward propelling force is applied through the Kaiser square guide rod, and downward tunneling and cutting are carried out. In the process, high-pressure gas and slurry are respectively injected into the tank through the gas supply and grouting systems at the same time until the required design depth is reached. And then, the two milling wheels rotate oppositely in opposite directions, the milling wheels are lifted upwards slowly through the Kai's square guide rod, gas and curing liquid are respectively injected into the groove through a gas supply and grouting pipeline system and are mixed with the foundation soil in the groove, and therefore an impermeable body formed by the foundation soil, a curing agent, water, an additive and the like is formed.
For the high-water-head foundation pit support of the highly permeable stratum, the supporting structures of the sheet pile, the cement soil mixing pile, the underground continuous wall and the gravity type cement soil wall have different defects. The double-wheel milling deep cement mixing earth wall and I-steel composite supporting seepage-proofing structure can achieve the double purposes of supporting and water stopping, can well save cost and shorten the construction period, and is a low-carbon and environment-friendly composite supporting structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a compound anchor rope supporting construction of cement soil wall is milled to double round.
The utility model discloses a realize through following technical scheme:
a double-wheel milling cement-soil wall composite anchor cable supporting structure comprises a rectangular double-wheel milling cement-soil cut-off wall, I-shaped steel is inserted into the middle of the double-wheel milling cement-soil cut-off wall at intervals, ring beams are constructed on the top of the double-wheel milling cement-soil cut-off wall and the inner wall of the double-wheel milling cement-soil cut-off wall around the double-wheel milling cement-soil cut-off wall, the interval between the upper ring beam and the lower ring beam is 5-6m, the inner side of the ring beam at the top of the double-wheel milling cement-soil cut-off wall is required to exceed the inner side of the double-wheel milling cement-soil cut-off wall, and vertical connecting beams are constructed between the upper ring beam and the lower ring beam;
arranging an outer side supporting structure unit consisting of a horizontal connecting beam and a vertical foundation pile on the outer side of a ring beam at the top of the double-wheel milling cement-soil impervious wall, wherein one end of the horizontal connecting beam is fixedly connected with a first ring beam, the other end of the horizontal connecting beam is connected with the top end of the vertical foundation pile, and the vertical foundation pile is vertically embedded in the stratum; the number of the outer side supporting structure units is multiple, and the outer side supporting structure units are arranged at intervals along the length direction of the ring beam at the top of the double-wheel milling cement-soil impervious wall;
and arranging anchor cables on the ring beam on the inner wall of the double-wheel milling cement-soil impervious wall at equal intervals along the length direction of the ring beam.
In the technical scheme, the length of the I-shaped steel is preferably 20-30m.
In the technical scheme, the top of the I-shaped steel is required to exceed the ring beam at the top of the double-wheel milling cement-soil impervious wall.
In the technical scheme, all the ring beams are made of reinforced concrete, and the cross sections of the ring beams are rectangular.
In the technical scheme, a foundation pit floor is built at the bottom of the double-wheel milling cemented soil impervious wall, and a vertical supporting beam is built between the foundation pit floor and the last ring beam on the foundation pit floor.
In the technical scheme, the ring beam constructed on the inner wall of the double-wheel milling cement-soil impervious wall is a reinforced concrete beam, and the reinforcing steel bars of the ring beam are driven into the double-wheel milling cement-soil impervious wall, so that the connection strength between the ring beam and the inner wall of the double-wheel milling cement-soil impervious wall is increased.
In the technical scheme, the vertical connecting beam is tightly attached to the inner wall of the double-wheel milling cement-soil impervious wall, the vertical connecting beam is made of reinforced concrete, and the reinforcing steel bars of the vertical connecting beam are driven into the double-wheel milling cement-soil impervious wall.
In the technical scheme, the vertical supporting beam is tightly attached to the inner wall of the double-wheel milling cement-soil impervious wall, the vertical supporting beam is made of reinforced concrete, and reinforcing steel bars of the vertical supporting beam are driven into the double-wheel milling cement-soil impervious wall.
In the technical scheme, the number of the ring beams on the inner wall of the cement-soil diaphragm wall is 3-5 by double-wheel milling, and the distance along the depth direction is 5-6m.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
the utility model discloses found multichannel collar tie beam on the double round mills cement impervious wall basis, set up vertical connection and a supporting beam between each collar tie beam, set up the outside bearing structure unit of constituteing by horizontal connection roof beam and vertical foundation pile in the first collar tie beam outside to along its length direction equidistant anchor rope of arranging on the collar tie beam. The composite support structure is stable, can effectively support the foundation pit of the strong permeable bed foundation, and ensures the safety of the construction process of excavating the foundation pit and the underground structure.
The cutter of the double-wheel milling head is made of alloy materials and diamonds, a proper cutter can be selected according to different geological stratum conditions, the double-wheel milling head can dig a soil layer, a sand layer, a gravel layer and a weathered rock layer, and the field adaptability is strong.
A double-wheel milling deep stirring and I-steel composite vertical supporting structure belongs to a semi-rigid supporting structure, is applicable to various stratums and cannot be damaged by brittle fracture.
Drawings
Fig. 1 is a top view of a double-wheel milling cement-soil wall composite anchor cable support structure.
Fig. 2 is a sectional view of the double-disc milling cement-soil wall composite anchor cable support structure shown in fig. 1, taken along the direction a.
Fig. 3 is a B-direction cross-sectional view of the double-disc milling cement-soil wall composite anchor cable supporting structure shown in fig. 1.
For a person skilled in the art, without inventive effort, other relevant figures can be derived from the above figures.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
A rectangular double-wheel milling cement-soil wall composite anchor cable supporting structure is constructed on a foundation pit site to be excavated, the depth of the double-wheel milling cement-soil impervious wall 1 is equal to that of the foundation pit, I-shaped steel 2 is inserted into the middle of the double-wheel milling cement-soil impervious wall 1 at intervals, ring beams 3.1-3.4 are constructed on the top of the double-wheel milling cement-soil impervious wall and on the inner wall of the double-wheel milling cement-soil impervious wall 1 around the double-wheel milling cement-soil impervious wall 1, the interval between the upper ring beam and the lower ring beam is 5-6m, the inner side of the ring beam at the top of the double-wheel milling cement-soil impervious wall exceeds the inner side of the double-wheel milling cement-soil impervious wall, and vertical connecting beams 5.1-5.3 are constructed between the upper ring beam and the lower ring beam.
Arranging an outer side supporting structure unit consisting of a horizontal connecting beam a and a vertical foundation pile b outside a ring beam 3.1 at the top of the double-wheel milling cement-soil impervious wall, wherein one end of the horizontal connecting beam is fixedly connected with a first ring beam, the other end of the horizontal connecting beam is connected with the top end of the vertical foundation pile, and the vertical foundation pile is vertically embedded in a stratum; the number of the outer side supporting structure units is multiple, and the outer side supporting structure units are arranged at intervals along the length direction of the ring beam at the top of the double-wheel milling cement-soil impervious wall; and arranging anchor cables on the ring beam on the inner wall of the double-wheel milling cement-soil impervious wall at equal intervals along the length direction of the ring beam.
In addition, a foundation pit floor 6 is built at the bottom of the double-wheel milling cemented soil impervious wall, and a vertical supporting beam 5.4 is built between the foundation pit floor and the last ring beam on the foundation pit floor.
This embodiment uses a certain building site stratum as an example, and is right the utility model discloses a construction method of double round milling cement soil wall composite anchor rope supporting construction explains. The ground layer of a certain building site comprises sand, pebble gravel, fully weathered rock, strongly weathered rock, stroke rock, breezy rock and unspent rock from top to bottom, the underground water level is 3m below the ground, the building requirements are that the excavation depth of a foundation pit is 20m, the foundation pit is rectangular, and the size of the foundation pit is 200m x 20m.
The construction method of the double-wheel milling cement-soil wall composite anchor cable supporting structure comprises the following specific steps:
leveling a building structure field, and removing earth surface vegetation and construction waste.
And step two, positioning double-wheel milling equipment, and testing piles according to the soil property of the stratum to determine construction parameters such as cement mixing amount, stirring speed and the like.
Thirdly, dividing the double-wheel milling cement soil impervious wall into a plurality of groove sections according to the shape and the size of a foundation pit to be excavated (the foundation pit in the embodiment is rectangular and the size is 200m x 20m), wherein the groove sections are numbered as 1,2,3,4,5 \8230insequence, and adopting a reciprocating type construction process, namely firstly constructing the groove sections 1, 3 and 5 and then constructing the groove sections 2, 4 and 6 \8230insequence, wherein the interval time between the sequence I and the sequence II is less than or equal to 12h; the length of each groove section is 2800mm, and the lap joint length is not less than 300mm; the wall body of the double-wheel milling cement-soil impervious wall is 100cm in thickness, and the depth of the wall body is 1m for entering the strongly weathered rock.
And step four, after construction of each double-wheel milling cemented soil impervious wall groove section is finished, vertically inserting two I-beams 2 into each double-wheel milling cemented soil impervious wall 1, wherein the length of each I-beam is 23m, preferably inserting two I-beams into each double-wheel milling cemented soil impervious wall groove section, the interval between the two I-beams is 1250mm, and smearing a lubricant or a plastic film on the surfaces of the I-beams.
After all the double-wheel milling cemented soil impervious walls and the I-beams are constructed, pouring and constructing a first ring beam 3.1 at the top of the double-wheel milling cemented soil impervious wall around the constructed rectangular double-wheel milling cemented soil impervious wall 1, wherein the top of the I-beams 2 exceeds the first ring beam; the first ring beam 3.1 is made of reinforced concrete, the section is rectangular, the size of the section is 80cm in height and 120cm in width, namely, the inner side of the first ring beam 3.1 exceeds the inner side of the double-wheel milling cement soil impervious wall 1 by 20cm.
Step six, arranging an outer side supporting structure unit consisting of a horizontal connecting beam a and a vertical foundation pile b on the outer side of the first ring beam 3.1, wherein one end of the horizontal connecting beam a is fixedly connected with the first ring beam 3.1, the other end of the horizontal connecting beam a is connected with the top end of the vertical foundation pile b, the vertical foundation pile b is vertically embedded in the stratum, and the depth of the vertical foundation pile b is preferably 5-7 m; the number of the outer side supporting structure units is multiple, the outer side supporting structure units are arranged at intervals along the length direction of the first ring beam 3.1, and the interval is preferably 20-30 meters. The outer side supporting structure unit is used for providing outward tensile force for the first ring beam 3.1 and preventing the first ring beam 3.1 and the double-wheel milling cement impervious wall from inclining inwards and collapsing.
And seventhly, excavating a foundation pit after the first ring beam 3.1 and the outer side supporting structure unit are constructed.
Step eight, when the foundation pit is excavated to the depth of 5m, constructing a second ring beam 3.2 on the inner wall of the double-wheel milling cemented soil impervious wall at the position of 5m around the rectangular double-wheel milling cemented soil impervious wall 1, wherein the second ring beam 3.2 is a reinforced concrete beam, and reinforcing steel bars of the second ring beam are driven into the double-wheel milling cemented soil impervious wall, so that the connection strength between the second ring beam 3.2 and the inner wall of the double-wheel milling cemented soil impervious wall is increased; in addition, in order to prevent the second ring beam 3.2 from falling, a vertical connecting beam 5.1 needs to be constructed between the second ring beam 3.2 and the part of the first ring beam 3.1, which exceeds the inner side of the double-wheel milled cement impervious wall, the second ring beam 3.2 is hung through the vertical connecting beam, the cross-sectional dimension of the vertical connecting beam is 30cm x 20cm, the number of the vertical connecting beams is multiple, the vertical connecting beams are arranged at intervals of 10m, the vertical connecting beams are tightly attached to the inner wall of the double-wheel milled cement impervious wall, and preferably, reinforcing steel bars of the vertical connecting beams are also driven into the inner part of the double-wheel milled cement impervious wall; then, arranging a first layer of anchor cables 4.1 on the second ring beam 3.2 at equal intervals along the length direction of the second ring beam, wherein the interval of the anchor cables is preferably 10m; it should be noted that when the second ring beam 3.2 is poured, an anchor hole is reserved in the second ring beam 3.2, so that an anchor cable is installed in the anchor hole after the second ring beam 3.2 is solidified.
Step nine, when the foundation pit is excavated to 10m deep, constructing a third ring beam 3.3 on the inner wall of the double-wheel milling cement-soil impervious wall around the rectangular double-wheel milling cement-soil impervious wall 1 at the position 10m deep, wherein the third ring beam 3.3 is a reinforced concrete beam, and reinforcing steel of the third ring beam is driven into the double-wheel milling cement-soil impervious wall, so that the connection strength between the third ring beam 3.3 and the inner wall of the double-wheel milling cement-soil impervious wall is increased, and in addition, in order to prevent the third ring beam 3.3 from falling, a vertical connecting beam 5.2 is also required to be constructed between the third ring beam 3.3 and the second ring beam 3.2; and then, laying a second layer of anchor cables 4.2 on the third ring beam 3.3 at equal intervals along the length direction of the third ring beam, wherein the interval of the anchor cables is preferably 10m.
Step ten, when the foundation pit is excavated to the depth of 15m, a fourth ring beam 3.4 is constructed on the inner wall of the double-wheel milling cement-soil impervious wall at the position of 10m around the rectangular double-wheel milling cement-soil impervious wall 1, the fourth ring beam 3.4 is a reinforced concrete beam, and reinforcing steel of the fourth ring beam is driven into the double-wheel milling cement-soil impervious wall, so that the connection strength between the fourth ring beam 3.4 and the inner wall of the double-wheel milling cement-soil impervious wall is increased, and in addition, in order to prevent the fourth ring beam 3.4 from falling off, a vertical connecting beam 5.3 is also required to be constructed between the fourth ring beam 3.4 and the third ring beam 3.3; and then, arranging a third layer of anchor cables 4.3 on the fourth ring beam 3.4 at equal intervals along the length direction of the fourth ring beam, wherein the interval of the anchor cables is preferably 10m.
Step eleven, excavating to the bottom of a foundation pit, pouring a foundation pit floor 6, and constructing a vertical supporting beam 5.4 between the foundation pit floor 6 and a fourth ring beam 3.4 (the vertical supporting beam is tightly attached to the inner wall of the double-wheel milling cement-soil impervious wall, preferably, reinforcing steel bars of the vertical supporting beam are also driven into the double-wheel milling cement-soil impervious wall); and then basement construction is carried out.
And step twelve, after the underground structure is constructed, pulling out the I-beams one by using a jack, wherein the I-beams can be recycled.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments to describe one element or feature's relationship to another element or feature as illustrated in the figures for ease of description. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (9)
1. The utility model provides a compound anchor rope supporting construction of double round milling cement soil wall which characterized in that: the double-wheel milling cement soil impervious wall comprises a rectangular double-wheel milling cement soil impervious wall, I-shaped steel is inserted into the double-wheel milling cement soil impervious wall at intervals, ring beams are constructed on the top of the double-wheel milling cement soil impervious wall and the inner wall of the double-wheel milling cement soil impervious wall around the double-wheel milling cement soil impervious wall, the interval between the upper ring beam and the lower ring beam is 5-6m, the inner side of the ring beam at the top of the double-wheel milling cement soil impervious wall is required to exceed the inner side of the double-wheel milling cement soil impervious wall, and a vertical connecting beam is constructed between each adjacent ring beam;
arranging an outer side supporting structure unit consisting of a horizontal connecting beam and a vertical foundation pile on the outer side of a ring beam at the top of the double-wheel milling cement-soil impervious wall, wherein one end of the horizontal connecting beam is fixedly connected with a first ring beam, the other end of the horizontal connecting beam is connected with the top end of the vertical foundation pile, and the vertical foundation pile is vertically embedded in the stratum; the number of the outer side supporting structure units is multiple, and the outer side supporting structure units are arranged at intervals along the length direction of the ring beam on the top of the double-wheel milling cement-soil impervious wall;
and arranging anchor cables on the ring beam on the inner wall of the double-wheel milling cement-soil impervious wall at equal intervals along the length direction of the ring beam.
2. The double round mills cement-soil wall composite anchor rope supporting construction of claim 1 characterized in that: the length of the I-shaped steel is 20-30m.
3. The double-wheel milling cement-soil wall composite anchor cable supporting structure as claimed in claim 1, wherein: the top of the I-shaped steel is required to exceed the ring beam on the top of the double-wheel milling cement-soil impervious wall.
4. The double round mills cement-soil wall composite anchor rope supporting construction of claim 1 characterized in that: all the ring beams are made of reinforced concrete materials, and the sections of the ring beams are rectangular.
5. The double round mills cement-soil wall composite anchor rope supporting construction of claim 1 characterized in that: a foundation pit floor is built at the bottom of the double-wheel milling cemented soil diaphragm wall, and a vertical supporting beam is built between the foundation pit floor and the last ring beam on the foundation pit floor.
6. The double round mills cement-soil wall composite anchor rope supporting construction of claim 1 characterized in that: and the ring beam constructed on the inner wall of the double-wheel milling cement-soil impervious wall is a reinforced concrete beam, and the reinforcing steel bars of the ring beam are driven into the double-wheel milling cement-soil impervious wall.
7. The double round mills cement-soil wall composite anchor rope supporting construction of claim 1 characterized in that: the vertical connecting beams are tightly attached to the inner wall of the double-wheel milling cemented soil impervious wall, the vertical connecting beams are made of reinforced concrete, and reinforcing steel bars of the vertical connecting beams are driven into the double-wheel milling cemented soil impervious wall.
8. The double-wheel milling cement-soil wall composite anchor cable supporting structure as claimed in claim 5, wherein: the vertical supporting beam is tightly attached to the inner wall of the double-wheel milling cemented soil impervious wall, the vertical supporting beam is made of reinforced concrete, and reinforcing steel bars of the vertical supporting beam are driven into the double-wheel milling cemented soil impervious wall.
9. The double round mills cement-soil wall composite anchor rope supporting construction of claim 1 characterized in that: the number of the ring beams on the inner wall of the double-wheel milling cement-soil impervious wall is 3-5, and the distance along the depth direction is 5-6m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220937337.5U CN217651802U (en) | 2022-04-21 | 2022-04-21 | Compound anchor rope supporting construction of double round milling cement soil wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220937337.5U CN217651802U (en) | 2022-04-21 | 2022-04-21 | Compound anchor rope supporting construction of double round milling cement soil wall |
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