CN204530730U - The novel closed cutting off water system of a kind of water rich strata foundation ditch - Google Patents

The novel closed cutting off water system of a kind of water rich strata foundation ditch Download PDF

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Publication number
CN204530730U
CN204530730U CN201520178004.9U CN201520178004U CN204530730U CN 204530730 U CN204530730 U CN 204530730U CN 201520178004 U CN201520178004 U CN 201520178004U CN 204530730 U CN204530730 U CN 204530730U
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water
foundation ditch
suspension type
foundation
closed cutting
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王国富
宋洋
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Jinan Rail Transit Group Co Ltd
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Jinan Rail Transit Group Co Ltd
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Abstract

The utility model belongs to the technical field of construction work, is specifically related to the novel closed cutting off water system of a kind of water rich strata foundation ditch and construction method.This totally-enclosed foundation ditch water-stop technology, foundation pit side-wall adopts suspension type water-stop curtain, the artificial water barrier of Horizontal seals is adopted bottom foundation ditch, described sidewall suspension type water-stop curtain and the artificial water barrier of described Horizontal seals define closed cutting off water system, within the scope of foundation ditch, underground water and the outer underground water in hole are without hydraulic connection, become Static Water, and by reasonably arranging each construction parameter and each structural parameters, provide the totally-enclosed foundation ditch that a kind of structure is excellent, and construction method is simple, solve existing when there is no a water barrier foundation pit construction bottom region of FuShui foundation ditch inside and outside foundation ditch a large amount of precipitation destroy the deficiency of groundwater resources, protect groundwater resources, prior meaning is had to the spring protection in spring city.

Description

The novel closed cutting off water system of a kind of water rich strata foundation ditch
Technical field
The utility model belongs to the technical field of construction work, is specifically related to the novel closed cutting off water system of a kind of water rich strata foundation ditch.
Background technology
Traditional region of FuShui deep foundation pit precipitation generally adopts foundation pit side-wall to arrange water-stop curtain, water-stopping structure is combined with supporting and protection structure, water-stop curtain and substrate water barrier form closed water proof system, now within the scope of foundation ditch underground water with hole outer underground water without hydraulic connection, become Static Water, as long as extract the underground water of more than the following certain depth in the end, hole as required, and then carry out cheating interior precipitation, ensure that base pit engineering safety.But, extensively distribute at Jinan Spring Region karst crevice water, substrate Karst corridor is complicated and water barrier is thinner sometimes, substrate water proof weak effect, traditional water-stop curtain does not have due effect, in this case foundation pit construction usually adopts in suspension type water-stop curtain+hole and cheats the method for outer precipitation simultaneously, the water conservancy gradient formed meets the requirement of groundwater table lower than the end, hole, but this construction method needs continuously groundwater abstraction in work progress, huge waste is caused to groundwater resources, huge hidden danger is brought to the protection of Jinan Area spring, therefore, above-mentioned two kinds of conventional Method on Dewatering of Foundation Pits all have drawback in Jinan Area.
Utility model content
For the deficiency of above-mentioned construction method; the purpose of this utility model is to provide a kind of Jinan Area water rich strata foundation ditch novel closed cutting off water system; be specially the construction method of precipitation in artificial water barrier Horizontal seals+Foundation Pit bottom foundation pit side-wall suspension type water-stop curtain+foundation ditch; under this construction method; manufacture artificial horizontal water barrier back cover bottom foundation ditch; form closed cutting off water system; avoid the outer precipitation in hole; decrease the waste of water resource, have prior meaning to the spring protection in spring city especially.
the technical solution adopted in the utility model is as follows:
The novel closed cutting off water system of a kind of water rich strata foundation ditch, comprise artificial water barrier Horizontal seals bottom foundation pit side-wall suspension type water-stop curtain and foundation ditch, bottom described foundation pit side-wall suspension type water-stop curtain and described foundation ditch, artificial water barrier Horizontal seals forms closed cutting off water system; Described foundation pit side-wall suspension type water-stop curtain is got to bottom foundation ditch following without the need to arriving natural water barrier; Bottom described foundation ditch, artificial water barrier Horizontal seals is artificial horizontal water barrier bottom the foundation ditch that adopts high-pressure rotary jet grouting pile to expand within the scope of foundation ditch to form sealing behind the end, and described high-pressure rotary jet grouting pile expands end ability Reasonable Arrangement within the scope of foundation ditch according to it.
Carry out precipitation in foundation ditch after closed cutting off water system completes, meet after foundation ditch water level inside requires and carry out excavation of foundation pit.
The feature of the novel closed cutting off water system of water rich strata foundation ditch of the present utility model also has:
The stake composition of described foundation pit side-wall suspension type water-stop curtain employing 600-800mm or employing thickness are the diaphragm wall composition of 600-800mm.
Described foundation pit side-wall suspension type water-stop curtain gets to the following 500-800mm degree of depth bottom foundation ditch, without the need to arriving natural water barrier.
Bottom described foundation ditch, the thickness of artificial water barrier Horizontal seals adopts 500-800mm thickness to be good, forms good Horizontal seals layer.
The sphere of action of described high-pressure rotary jet grouting pile is diameter 2-3m.
Described foundation pit side-wall suspension type water-stop curtain adopts diaphragm wall, fender post+waterproof between piles, high-pressure rotary jet grouting pile or three axes agitating pile construction to obtain.
the construction method of the novel closed cutting off water system of a kind of water rich strata foundation ditch of the present utility model, step is as follows:
Step (1), carry out foundation pit side-wall suspension type water-stop curtain according to designing requirement construction layout after excavate guide groove;
Step (2), configuration cement paste, mixer rear mixing-filling in place, completes the construction of described foundation pit side-wall suspension type water-stop curtain;
Step (3), employing high-pressure rotary jet grouting pile expand artificial water barrier Horizontal seals bottom end formation foundation ditch bottom foundation ditch, according to ability hole arranged position within the scope of foundation ditch at the bottom of the expansion of described high-pressure rotary jet grouting pile, and driller insertion;
Step (4), carry out described high-pressure rotary jet grouting pile and expand bottom application work, namely through preparing cement paste, after sleeve pipe drilling rod to the following degree of depth of substrate transferred by startup rig, inject high pressure water and air destroys the foundation soil organizational styucture below bottom foundation ditch, then inject high pressure cement grout and air, progressively promote afterwards and spray cement injection, spray after rising to foundation ditch elevation of bottom and terminate, lift lug pipe bit bar completes the working procedure of a high-pressure rotary jet grouting pile, the inner all Construction of High Pressure Jet Grouting Pile operations of foundation ditch are completed after telephone-moving is in place, after high-pressure rotary jet grouting pile expands the end, substrate is covered completely and form artificial water barrier Horizontal seals bottom foundation ditch, for guaranteeing the totally-enclosed of substrate, need after Construction of High Pressure Jet Grouting Pile completes to carry out supplementary slip casting, ,
After bottom step (5), described foundation pit side-wall suspension type water-stop curtain and described foundation ditch, artificial water barrier Horizontal seals forms closed cutting off water system, carry out cheating interior precipitation within the scope of foundation ditch;
Step (6), excavation pit.
It is that the kinetic energy utilizing super-pressure churning body to have destroys foundation soil organizational styucture following bottom foundation ditch with grouting behind shaft or drift lining that described high-pressure rotary jet grouting pile expands end construction, mix and blend these destroyed grogs and hardened materials, form bigbore substrate modified body, each expansion after end modified body overlaps forms one deck level artificial water barrier as water barrier Horizontal seals artificial bottom foundation ditch.
Described foundation pit side-wall suspension type water-stop curtain generally adopts diaphragm wall, fender post+waterproof between piles, high-pressure rotary jet grouting pile or three axes agitating pile construction to construct, and gets to following bottom foundation ditch but do not need natural water barrier by described foundation pit side-wall suspension type water-stop curtain by water-stopping structure.
the beneficial effects of the utility model are as follows:
The utility model provides a kind of closed cutting off water system for water rich strata, this totally-enclosed foundation ditch water-stop technology, foundation pit side-wall adopts suspension type water-stop curtain, the artificial water barrier of Horizontal seals is adopted bottom foundation ditch, described sidewall suspension type water-stop curtain and the artificial water barrier of described Horizontal seals define closed cutting off water system, within the scope of foundation ditch, underground water and the outer underground water in hole are without hydraulic connection, become Static Water, and by reasonably arranging each construction parameter and each structural parameters, provide the totally-enclosed foundation ditch that a kind of structure is excellent, and construction method is simple, solve existing when there is no a water barrier foundation pit construction bottom region of FuShui foundation ditch inside and outside foundation ditch a large amount of precipitation destroy the deficiency of groundwater resources, protect groundwater resources, prior meaning is had to the spring protection in spring city.
Accompanying drawing explanation
Fig. 1 is foundation pit side-wall suspension type water-stop curtain and foundation ditch inner high voltage rotary churning pile layout plan;
Fig. 2 is excavation of foundation pit front side wall suspension type water-stop curtain and hole inner high voltage rotary churning pile sectional drawing;
Fig. 3 is that foundation ditch defines the rear sectional drawing of closed water-stopping structure excavation;
In figure: 1-foundation pit side-wall suspension type water-stop curtain; 2-high-pressure rotary jet grouting pile expands end modified body; 3-foundation pit supporting construction; 4-high-pressure rotary-spray pipe casing; 5-groundwater table; 6-foundation ditch bottom surface absolute altitude; Artificial water barrier Horizontal seals bottom 7-foundation ditch; Groundwater table after precipitation in 8-foundation ditch.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
As shown in Figure 1, Figure 2, Figure 3 shows; this foundation ditch is Jinan Spring Region area foundation ditch; groundwater table 5 is higher; foundation ditch bottom surface absolute altitude 6 is positioned at below groundwater table; according to advance works geological mapping, without water barrier below substrate, therefore from protection spring and security of foundation ditch construction angle; the pattern foundation pit supporting structure precipitation scheme determined adopts foundation pit side-wall suspension type water-stop curtain 1, and the scheme that the end arranges artificial water barrier Horizontal seals 7 bottom foundation ditch is expanded by high-pressure rotary jet grouting pile in the end, hole.
The novel closed cutting off water system of a kind of water rich strata foundation ditch, comprise artificial water barrier Horizontal seals 7 bottom foundation pit side-wall suspension type water-stop curtain 1 and foundation ditch, bottom described foundation pit side-wall suspension type water-stop curtain 1 and described foundation ditch, artificial water barrier Horizontal seals 7 forms closed cutting off water system; Described foundation pit side-wall suspension type water-stop curtain adopts three axes agitating pile construction, water-stop curtain is got to following 500mm place bottom foundation ditch, and without the need to arriving natural water barrier, this foundation pit side-wall suspension type water-stop curtain adopts the stake composition of 600-800mm; Bottom described foundation ditch, artificial water barrier Horizontal seals is the artificial horizontal water barrier in bottom forming sealing after adopting high-pressure rotary jet grouting pile to expand the end within the scope of foundation ditch, described high-pressure rotary jet grouting pile expands end ability Reasonable Arrangement within the scope of foundation ditch according to it, and high-pressure rotary jet grouting pile sphere of action at the bottom of the expansion of substrate is diameter 2-3m; The kinetic energy utilizing super-pressure churning body to have destroys foundation soil organizational styucture following bottom foundation ditch with grouting behind shaft or drift lining, mix and blend these destroyed grogs and hardened materials, form bigbore high-pressure rotary jet grouting pile and expand end modified body 2, one deck level artificial water barrier is formed after modified body at the bottom of each expansion overlaps, bottom described foundation ditch, the thickness of artificial water barrier Horizontal seals adopts 500-800mm thickness to be good, forms good Horizontal seals layer.
Bottom described foundation pit side-wall suspension type water-stop curtain and described foundation ditch, artificial water barrier Horizontal seals forms totally enclosed sealing system.
Diaphragm wall, fender post+waterproof between piles, Construction of High Pressure Jet Grouting Pile engineering method can also be adopted to obtain about foundation pit side-wall suspension type water-stop curtain.
The construction sequence of above-mentioned closed cutting off water system is as follows:
Step (1), according to providing coordinate basis point, release stake position, set up and control stake temporarily by figure, according to bracing of foundation pit sideline digging machine excavation agitation pile groove, and remove underground obstacle, groove dimensions is that 1 meter of wide × 1 is meter dark.
Step (2), three axes agitating pile center distance are 600mm, stake footpath 800mm, pile-forming machine perching.
Step (3), prepare cement grout and slurries and inject, the water/binder ratio of cement grout applies according to code requirement, cement mixing content 20%, slurry flow rate is 250L/min, grouting pressure is not less than 1.0MPa, complete three axes agitating pile construction, form foundation pit side-wall suspension type water-stop curtain, this foundation pit side-wall suspension type water-stop curtain 1 also can be used as foundation pit supporting construction 3;
Step (4), employing high-pressure rotary jet grouting pile expand artificial water barrier Horizontal seals bottom end formation foundation ditch bottom foundation ditch, according to ability hole arranged position within the scope of foundation ditch at the bottom of the expansion of described high-pressure rotary jet grouting pile, and driller insertion;
Step (5), carry out described high-pressure rotary jet grouting pile and expand bottom application work, namely through preparing cement paste, after below high-pressure rotary-spray pipe casing 4 drilling rod to the substrate 500mm degree of depth transferred by startup rig, inject high pressure water and air destroys the foundation soil organizational styucture below bottom foundation ditch, then inject high pressure cement grout and air, progressively promote afterwards and spray cement injection, spray after rising to foundation ditch elevation of bottom and terminate, lift lug pipe bit bar completes the working procedure of a high-pressure rotary jet grouting pile, the inner all Construction of High Pressure Jet Grouting Pile operations of foundation ditch are completed after telephone-moving is in place, after high-pressure rotary jet grouting pile expands the end, sleeve pipe extracted and continue slip casting with conduit, guarantee substrate to cover completely and form artificial water barrier Horizontal seals bottom foundation ditch,
After bottom step (6), described foundation pit side-wall suspension type water-stop curtain and described foundation ditch, artificial water barrier Horizontal seals forms closed cutting off water system, carry out cheating interior precipitation within the scope of foundation ditch, in foundation ditch, after precipitation, groundwater table 8 is down to foundation ditch bottom surface absolute altitude less than 6;
Step (7), excavation pit.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.

Claims (6)

1. the novel closed cutting off water system of water rich strata foundation ditch, comprise artificial water barrier Horizontal seals bottom foundation pit side-wall suspension type water-stop curtain and foundation ditch, bottom described foundation pit side-wall suspension type water-stop curtain and described foundation ditch, artificial water barrier Horizontal seals forms closed cutting off water system; Described foundation pit side-wall suspension type water-stop curtain is got to bottom foundation ditch following without the need to arriving natural water barrier; Bottom described foundation ditch, artificial water barrier Horizontal seals is artificial horizontal water barrier bottom the foundation ditch that adopts high-pressure rotary jet grouting pile to expand within the scope of foundation ditch to form sealing behind the end, and described high-pressure rotary jet grouting pile expands end ability Reasonable Arrangement within the scope of foundation ditch according to it.
2. the novel closed cutting off water system of water rich strata foundation ditch according to claim 1, is characterized in that, the stake composition of described foundation pit side-wall suspension type water-stop curtain employing 600-800mm or employing thickness are the diaphragm wall composition of 600-800mm.
3. the novel closed cutting off water system of water rich strata foundation ditch according to claim 1, is characterized in that, described foundation pit side-wall suspension type water-stop curtain gets to the following 500-800mm degree of depth bottom foundation ditch, without the need to arriving natural water barrier.
4. the novel closed cutting off water system of water rich strata foundation ditch according to claim 1, is characterized in that, bottom described foundation ditch, the thickness of artificial water barrier Horizontal seals adopts 500-800mm thickness to be good, forms good Horizontal seals layer.
5. the novel closed cutting off water system of water rich strata foundation ditch according to claim 1, is characterized in that, the sphere of action of described high-pressure rotary jet grouting pile is diameter 2-3m.
6. the novel closed cutting off water system of water rich strata foundation ditch according to claim 1, it is characterized in that, described foundation pit side-wall suspension type water-stop curtain adopts diaphragm wall, fender post+waterproof between piles, high-pressure rotary jet grouting pile or three axes agitating pile construction to obtain.
CN201520178004.9U 2015-03-27 2015-03-27 The novel closed cutting off water system of a kind of water rich strata foundation ditch Active CN204530730U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104674827A (en) * 2015-03-27 2015-06-03 济南轨道交通集团有限公司 Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system
CN105369813A (en) * 2015-10-14 2016-03-02 河海大学 Geotextile bag type support erecting method
CN106567399A (en) * 2016-10-12 2017-04-19 上海市建工设计研究院有限公司 Ultrathick coral chip-contained stratum foundation pit water stop structure and method
CN108625384A (en) * 2018-05-16 2018-10-09 中交公局第二工程有限公司 A kind of construction method of deep strong permeable layer base pit dewatering structure
CN113235612A (en) * 2021-05-17 2021-08-10 中铁二十四局集团有限公司 Deep foundation pit supporting construction method for soft soil foundation high-pressure-bearing water environment adjacent to high-speed rail

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104674827A (en) * 2015-03-27 2015-06-03 济南轨道交通集团有限公司 Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system
CN105369813A (en) * 2015-10-14 2016-03-02 河海大学 Geotextile bag type support erecting method
CN106567399A (en) * 2016-10-12 2017-04-19 上海市建工设计研究院有限公司 Ultrathick coral chip-contained stratum foundation pit water stop structure and method
CN108625384A (en) * 2018-05-16 2018-10-09 中交公局第二工程有限公司 A kind of construction method of deep strong permeable layer base pit dewatering structure
CN113235612A (en) * 2021-05-17 2021-08-10 中铁二十四局集团有限公司 Deep foundation pit supporting construction method for soft soil foundation high-pressure-bearing water environment adjacent to high-speed rail

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