CN217758897U - Waterproof curtain structure used in running water environment in complex soil layer - Google Patents
Waterproof curtain structure used in running water environment in complex soil layer Download PDFInfo
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- CN217758897U CN217758897U CN202221073647.3U CN202221073647U CN217758897U CN 217758897 U CN217758897 U CN 217758897U CN 202221073647 U CN202221073647 U CN 202221073647U CN 217758897 U CN217758897 U CN 217758897U
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Abstract
The utility model relates to a waterproof technical field of building construction foundation ditch, specific relate to a stagnant water curtain structure that is arranged in complicated soil layer under moving water environment, including the cement continuous wall that sets up in the rubble fill out soil within range, still spout pile group and second high pressure soon including setting up at the first high pressure of cement continuous wall below and spout pile group, the top and the cement wall bottom interlock of the jet grouting pile of first high pressure jet grouting pile group, mutual interlock between the double-phase adjacent jet grouting pile of first high pressure jet grouting pile group, the axis of the jet grouting pile of first high pressure jet grouting pile group and the central line coincidence of the vertical direction of cement continuous wall, second high pressure jet grouting pile group sets up the inboard at first high pressure jet grouting pile group, and second high pressure jet grouting pile group and first high pressure jet grouting pile group interlock each other, utilize respective advantage complementary disadvantaged potential of each other, form stable stagnant water curtain structure.
Description
Technical Field
The utility model relates to a waterproof technical field of building construction foundation ditch, specificly relate to a stagnant water curtain structure that is arranged in complicated soil layer under the flowing water environment.
Background
Along with the continuous development and utilization of underground space, civil engineering constantly develops toward the direction of depth to a large amount of deep basal pit engineering have appeared, and deep basal pit is very easily influenced by groundwater in the excavation process, if groundwater rivers gush into too much, not only lead to the unable normal use of foundation ditch, still probably lead to the emergence of incident simultaneously, therefore precipitation measure is unusual important in deep basal pit engineering.
The waterproof curtain is an important structure in the existing deep foundation pit for preventing water, and basically needs to be arranged to prevent the underground water from leaking if the bottom surface of the foundation pit is below the underground water level and the precipitation is difficult.
In coastal cities, the scale of construction of coastal underground spaces is increasing with the construction of coastal cities. Under the geological conditions of coastal deep filling and soft soil stratum, the influence of seawater and tide is great, underground water is abundant, and the construction of a waterproof curtain is a basic condition when an underground space is excavated.
In the currently used waterproof curtain structure, a waterproof wall formed by continuous mixing piles (cement mixing piles, etc.) and single-pipe and three-pipe jet grouting piles is called a waterproof curtain. Common waterproof curtains include a high-pressure jet grouting pile, a deep mixing pile waterproof curtain, a jet grouting pile waterproof curtain, and a spiral drilling machine plain concrete or mud jacking waterproof curtain recently appears; underground building envelopes in the form of underground continuous walls, drilled secant piles and the like.
The diaphragm wall, also called underground diaphragm wall, is a foundation engineering, and adopts a trenching machine on the ground to excavate a long and narrow deep groove along the peripheral axis of the deep excavation engineering under the condition of slurry wall protection. After the groove is cleaned, a reinforcement cage is hung in the groove, and then underwater concrete is poured by a guide pipe method to form a unit groove section. The construction is carried out section by section, a continuous reinforced concrete wall is built underground and serves as a water intercepting, seepage preventing, bearing and retaining structure, but the continuous wall is difficult to construct under the geological conditions of soft mucky soil and superhard rocks, and the construction adaptability problem exists.
The high-pressure jet grouting pile is a continuous columnar combination poured by adopting a high-pressure jet grouting method, can be used for foundation reinforcement treatment, deep foundation pit water stop curtain, slope soil retaining or water retaining, foundation pit bottom reinforcement and other foundation reinforcement layers of existing buildings and newly-built buildings, but has larger curtain construction difficulty and is limited by the conditions of a water environment and a soil layer when large-particle-diameter stone blocks, hard cohesive soil, a large number of plant roots and stems or excessive organic matters exist, and during construction, if a high-pressure jet grouting pile construction process is adopted, cement and other curing materials are easy to dissipate along with water flow, the curtain is ineffective, and water stopping is difficult.
Due to the influence of water and tide on coastal cities, particularly when complex geological conditions such as soft soil at the lower part exist below a deep broken stone filling layer on the ground surface, the diaphragm wall or the high-pressure jet grouting pile which is used independently cannot be well suitable for the complex geological conditions, so that the water stopping purpose cannot be achieved, or the water stopping purpose can be achieved only by investing a large amount of cost.
Utility model patent CN207597401U discloses a waterproof curtain with stagnant water steel sheet, for the stagnant water intensity and the pile body intensity that increase waterproof curtain, improves the performance of the manger plate of waterproof curtain and designs. The waterproof curtain consists of waterproof curtains and waterproof steel sheets, wherein the pile bodies are mutually meshed; however, the construction cost of the steel sheet is high, and the steel sheet is difficult to install when the water stopping depth is large.
The patent of invention patent CN110792093A discloses a foundation pit waterproof curtain construction method and a waterproof curtain, wherein concrete piles are constructed at intervals, and the concrete piles are mutually occluded. The technical problems that the waterproof curtain in the prior art cannot meet the requirement of dry groove operation in a foundation pit under the condition that the water level of underground water rises sharply, and construction progress and construction quality are influenced are solved. The problems of high construction cost and long construction period exist.
The above patent slightly strengthens the self strength and water stopping of the waterproof curtain by adding the waterproof steel sheet, or strengthens the water stopping effect by constructing concrete piles at intervals in a place where the soil layer is single, but does not describe how to increase the water stopping effect of the waterproof curtain in a complex soil layer structure.
The invention patent CN105986570A discloses a high-pressure jet grouting pile construction method for reinforcing, sealing and sealing water of an underground continuous wall interface, which adopts a mature high-pressure jet grouting pile construction process and strengthens, seals and seals water of a weak link of the underground continuous wall interface in a mode of additionally manufacturing a high-pressure jet grouting pile on the outer side of the underground continuous wall interface, and is characterized by comprising the following technical measures: a. determining construction parameters and selecting a construction method, b, controlling a spraying material, c, measuring and positioning, d, testing a pile, e, controlling a spraying process construction technology, f, observing slurry return, g, recharging, h, observing the surrounding environment in the spraying process and i, discharging waste slurry and sewage.
However, in the above technical solution, the interface of the continuous wall is treated by the high-pressure jet grouting piles at the interface of the continuous wall, so as to improve the water stopping effect of the weak link of the interface of the continuous wall.
Therefore, the technical personnel in the field need an integrated water stopping system which has convenient construction, low manufacturing cost and high water stopping reliability and can achieve the preset water stopping effect under the complex soil layer environment with gravel filling, soft soil and the like.
Disclosure of Invention
To the problem that exists above, the utility model aims to: the integrated waterproof curtain structure avoids the problems that the independent high-pressure jet grouting cannot form piles in the gravel filling, and a cement-soil continuous wall cannot penetrate soft soil below the gravel filling, is convenient to construct, low in manufacturing cost and high in waterproof reliability, and can achieve a preset waterproof effect under the complex soil layer environments with gravel filling, soft soil and the like.
In order to achieve the above purpose, the utility model discloses the technical scheme who takes is: the utility model provides a waterproof curtain structure for among complicated soil layer move under water environment, includes the cement continuous wall that sets up in the rubble fill out soil within range, still spouts pile group and second high pressure jet grouting pile group soon including setting up the first high pressure that sets up in cement continuous wall below, the top and the cement wall bottom interlock of the jet grouting pile of first high pressure jet grouting pile group, mutual interlock between the double-phase adjacent jet grouting pile of first high pressure jet grouting pile group, the axis of the jet grouting pile of first high pressure jet grouting pile group and the central line coincidence of the vertical direction of cement continuous wall, second high pressure jet grouting pile group sets up at the inboard of first high pressure jet grouting pile group, and second high pressure jet grouting pile group and first high pressure jet grouting pile group interlock each other.
According to the waterproof curtain structure used in the dynamic water environment in the complex soil layer, the through hole for installing the injection device of the first high-pressure jet grouting pile group is prefabricated at the center line of the cement continuous wall in the vertical direction.
According to the waterproof curtain structure used in the dynamic water environment in the complex soil layer, the occlusion depth of the top of the first high-pressure rotary spraying pile group and the bottom of the cement-soil continuous wall is 0.5-1.0 m, and the diameter of the first high-pressure rotary spraying pile group is larger than the thickness of the cement-soil continuous wall.
According to the waterproof curtain structure used in the dynamic water environment in the complex soil layer, the engagement depth between the adjacent rotary spraying piles of the first high-pressure rotary spraying pile group is 0.2-0.3 m, and the distance between two engagement points between the adjacent rotary spraying piles is larger than the thickness of the cement-soil continuous wall.
Foretell a stagnant water curtain structure for under moving water environment in the complicated soil layer, the pile group is spouted soon with first high pressure to the second high pressure spouts pile group parallel arrangement each other, and the pile top elevation and the pile bottom elevation that the pile group was spouted soon to the second high pressure are the same with the pile top elevation and the pile bottom elevation that the pile group was spouted soon to first high pressure, the deep water barrier in bottom that the pile group was spouted soon to first high pressure is no less than 0.5m.
According to the waterproof curtain structure used in the moving water environment in the complex soil layer, the occlusion part between the rotary jet piles of the second high-pressure rotary jet pile group close to the first high-pressure rotary jet pile group is superposed and/or occluded with the occlusion part between the rotary jet piles of the first high-pressure rotary jet pile group close to the second high-pressure rotary jet pile group.
The utility model relates to a stagnant water curtain structure that is arranged in complicated soil layer to move under the aquatic environment is: the cement continuous wall is arranged in the deep gravel filling layer, the construction and water stop advantages of the cement continuous wall in a gravel environment are utilized, the influence of a dynamic water environment in a soil layer is reduced, the high-pressure rotary spraying pile group is arranged in a soft soil layer below the gravel filling layer, the property that the efficiency of the high-pressure rotary spraying pile in the soft soil layer is higher than that of the cement continuous wall is utilized, the problems that a pile cannot be formed in the gravel filling layer due to independent high-pressure rotary spraying and the cement continuous wall cannot penetrate through soft soil below the gravel filling layer are solved, the cement wall and the high-pressure rotary spraying pile curtain are combined to form an integrated water stop system, and the disadvantages of mutual complementation of the advantages are utilized to form a stable water stop curtain structure; the through holes are arranged at the position of the longitudinal center line of the cement-soil continuous wall as required, so that the high-pressure rotary spraying piles are conveniently arranged under the cement-soil continuous wall, the structure that the top end of the first high-pressure rotary spraying pile group is mutually meshed with the bottom of the cement-soil continuous wall is utilized, the cement-soil continuous wall and the high-pressure rotary spraying pile curtain are combined to form an integrated water stopping system, the second high-pressure rotary spraying pile group is arranged on the inner side of the first high-pressure rotary spraying pile group, the gaps between the cement-soil continuous wall and the first high-pressure rotary spraying pile group and the gaps between the rotary spraying piles in the first high-pressure rotary spraying pile group can be further plugged, and the water stopping effect is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 isbase:Sub>A schematic sectional view of the part A-A of the present invention;
FIG. 3 is a schematic top view of the cement continuous wall of the present invention;
fig. 4 is a schematic top view of the staggered occlusion structure of the jet grouting pile set of the present invention.
Description of reference numerals: the water-resistant water-level-lowering construction method comprises a broken stone filling layer 1, a soft soil layer 2, a water-proof stratum 3, a cement-soil continuous wall 4, a first high-pressure rotary spraying pile group 5, a second high-pressure rotary spraying pile group 6, through holes 7, the ground 8, an upstream water-moving water level line 9 and a design precipitation water level 10.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to the following detailed description and accompanying drawings.
As shown in fig. 1-4, a waterproof curtain structure for use in a flowing water environment in a complex soil layer, the complex soil layer including but not limited to a deep gravel pack 1 including an upper layer, a soft soil layer 2 below the gravel pack, and a waterproof layer 3 below the layer, the waterproof curtain structure including a cement continuous wall 4 arranged within a gravel pack range, a first high-pressure jet grouting pile group 5 and a second high-pressure jet grouting pile group 6 below the cement continuous wall, a through hole penetrating the cement continuous wall in a vertical direction being prefabricated at a central line position of the cement continuous wall in the vertical direction, the through holes can be sequentially arranged on the cement continuous wall according to the number of the set rotary spraying piles of the high-pressure rotary spraying pile group through the high-pressure injection device of the high-pressure rotary spraying pile group, when the high-pressure rotary spraying pile group is injected, the diameter of the first high-pressure rotary spraying pile group is larger than the thickness of the cement continuous wall, the top end of the rotary spraying pile of the first high-pressure rotary spraying pile group is meshed with the bottom of the cement continuous wall, the meshing depth is 0.5m-1.0m, two adjacent rotary spraying piles of the first high-pressure rotary spraying pile group are meshed with each other, the meshing depth is 0.2m-0.3m, and the distance between two meshing points between two adjacent rotary spraying piles is larger than the thickness of the cement continuous wall.
The second high-pressure jet grouting pile group and the first high-pressure jet grouting pile group are arranged in parallel, the pile top elevation and the pile bottom elevation of the second high-pressure jet grouting pile group are the same as those of the first high-pressure jet grouting pile group, and the bottom of the first high-pressure jet grouting pile group is deep into the waterproof layer and is not less than 0.5m.
Further, in order to better improve the auxiliary plugging effect of the second high-pressure jet grouting pile group on the first high-pressure jet grouting pile group, the occlusion part of the second high-pressure jet grouting pile group close to the jet grouting piles of the first high-pressure jet grouting pile group is overlapped and/or occluded with the occlusion part of the first high-pressure jet grouting pile group close to the jet grouting piles of the second high-pressure jet grouting pile group, so that no gap is reserved at the occlusion position between the jet grouting piles of the first high-pressure jet grouting pile group.
Furthermore, staggered and crossed occlusion can be adopted between the second high-pressure rotary jet pile group and the first high-pressure rotary jet pile group, namely, the central line position of the second high-pressure rotary jet pile group is aligned with the occlusion point position of the first high-pressure rotary jet pile group, and the central line position of the first high-pressure rotary jet pile group is aligned with the occlusion point position of the second high-pressure rotary jet pile group.
Specifically, a cement-soil continuous wall is constructed in broken stone filled soil at a construction position of the ground 8 by adopting a cement-soil continuous wall process, a water-moving line 9 on the upstream side is arranged on the outer side of the cement-soil continuous wall, a foundation pit construction area is arranged on the inner side of the cement-soil continuous wall, and the water level of the water-moving line on the upstream side needs to be reduced to a design precipitation water level 10 required by construction in the area. The cement-soil continuous wall needs to penetrate through a deep gravel filling layer to enter a soft soil layer, a through hole is prefabricated on the cement-soil continuous wall, after the cement-soil continuous wall is solidified, a first high-pressure rotary spraying pile group is constructed in the through hole of the cement-soil continuous wall, the pile top of the first high-pressure rotary spraying pile group is meshed with the cement-soil continuous wall by 0.5-1.0 meter, the pile bottom of a rotary spraying pile of the first high-pressure rotary spraying pile group enters a water-resisting layer by not less than 0.5 meter, a second high-pressure rotary spraying pile group is meshed between adjacent rotary spraying piles of the first high-pressure rotary spraying pile group by 0.2-0.3 meter, after the first high-pressure rotary spraying pile group is solidified, a pile top elevation and a pile bottom elevation of the second high-pressure rotary spraying pile group are constructed on the cement-soil continuous wall and the inner side (namely the precipitation side of the inner side of a foundation trench), and the pile top elevation and the pile bottom elevation of the second high-pressure rotary spraying pile group are the same as those of the first high-soil rotary spraying pile group. The high-pressure jet grouting pile is closely connected with the cement continuous wall which is formed by jetting high-pressure water and cement slurry, and occlusion is realized. The first row of high-pressure jet grouting piles are meshed with the cement continuous wall. And (3) injecting cement in the high-pressure jet grouting pile construction, and filling cement slurry into the drilled holes in the cement-soil wall to realize mutual occlusion. After the curtain strength reaches the design strength, the water level in the foundation pit can be reduced to the design precipitation water level so as to meet the construction requirement.
The above embodiments are only for illustrating the structural conception and the characteristics of the present invention, and the purpose thereof is to enable the person skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. The utility model provides a waterproof curtain structure for among complicated soil layer move under the water environment, includes the cement continuous wall that sets up in rubble fill soil within range, its characterized in that: still spout pile group and second high pressure soon including setting up first high pressure of cement continuous wall below and spout pile group soon, the top and the cement continuous wall bottom interlock of the jet grouting pile of first high pressure jet grouting pile group, mutual interlock between the double-phase adjacent jet grouting pile of first high pressure jet grouting pile group, the axis of the jet grouting pile of first high pressure jet grouting pile group and the central line coincidence of the vertical direction of cement continuous wall, the pile group setting is spouted soon at first high pressure to the second high pressure, and second high pressure jet grouting pile group and first high pressure spout mutual interlock between the pile group soon.
2. The waterproof curtain structure used in the running water environment in the complex soil layer according to claim 1, wherein: and a through hole for installing a spraying device of the first high-pressure rotary spraying pile group is prefabricated at the center line of the cement-soil continuous wall in the vertical direction.
3. The waterproof curtain structure used in the running water environment in the complex soil layer according to claim 1, wherein: the occlusion depth of the top of the first high-pressure rotary spraying pile group and the bottom of the cement-soil continuous wall is 0.5-1.0 m, and the diameter of the first high-pressure rotary spraying pile group is larger than the thickness of the cement-soil continuous wall.
4. The waterproof curtain structure used in the running water environment in the complex soil layer according to claim 3, wherein: the occlusion depth between adjacent jet grouting piles of the first high-pressure jet grouting pile group is 0.2-0.3 m, and the distance between two occlusion points between the adjacent jet grouting piles is larger than the thickness of the cement continuous wall.
5. The waterproof curtain structure used in the running water environment in the complex soil layer according to claim 1, wherein: second high pressure spouts pile group soon and spouts pile group parallel arrangement each other with first high pressure soon, and the pile bolck elevation that pile group was spouted soon to second high pressure are the same with the pile bolck elevation and the pile bolck elevation that pile group was spouted soon to first high pressure, the deep water barrier in bottom that first high pressure spouts pile group soon is no less than 0.5m.
6. The waterproof curtain structure used in the running water environment in the complex soil layer according to claim 5, wherein: the occlusion part of the second high-pressure rotary spraying pile group close to the rotary spraying piles of the first high-pressure rotary spraying pile group is overlapped and/or occluded with the occlusion part of the first high-pressure rotary spraying pile group close to the rotary spraying piles of the second high-pressure rotary spraying pile group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221073647.3U CN217758897U (en) | 2022-05-07 | 2022-05-07 | Waterproof curtain structure used in running water environment in complex soil layer |
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| CN202221073647.3U CN217758897U (en) | 2022-05-07 | 2022-05-07 | Waterproof curtain structure used in running water environment in complex soil layer |
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| CN217758897U true CN217758897U (en) | 2022-11-08 |
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| CN202221073647.3U Active CN217758897U (en) | 2022-05-07 | 2022-05-07 | Waterproof curtain structure used in running water environment in complex soil layer |
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