CN110241828A - The outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining - Google Patents

The outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining Download PDF

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Publication number
CN110241828A
CN110241828A CN201910529055.4A CN201910529055A CN110241828A CN 110241828 A CN110241828 A CN 110241828A CN 201910529055 A CN201910529055 A CN 201910529055A CN 110241828 A CN110241828 A CN 110241828A
Authority
CN
China
Prior art keywords
tubular pole
anchor
construction
supporting
anchor cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910529055.4A
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Chinese (zh)
Inventor
罗炎雄
朱峰
朱谦
杨岳良
夏泽志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENZHEN ZHONGBANG (GROUP) CONSTRUCTION CONTACT CO Ltd
Original Assignee
SHENZHEN ZHONGBANG (GROUP) CONSTRUCTION CONTACT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENZHEN ZHONGBANG (GROUP) CONSTRUCTION CONTACT CO Ltd filed Critical SHENZHEN ZHONGBANG (GROUP) CONSTRUCTION CONTACT CO Ltd
Priority to CN201910529055.4A priority Critical patent/CN110241828A/en
Publication of CN110241828A publication Critical patent/CN110241828A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/12Restraining of underground water by damming or interrupting the passage of underground water
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/50Piles comprising both precast concrete portions and concrete portions cast in situ
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/76Anchorings for bulkheads or sections thereof in as much as specially adapted therefor

Abstract

The invention discloses sealing construction method for supporting outside anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining, comprising the following steps: step 1, Farm Planning;PHC tubular pole is embedded in underground, steel reinforcement cage is placed in tubular pole and pours expansion pea gravel concreten by step 2;Step 3, sets the first mixing pile in tubular pole stuff up a crack, sets the second mixing pile in tubular pole outside;Step 4: crown beam is poured in the top surface of tubular pole;Step 5 excavates topsoil within the scope of crown beam, and in foundation pit side-wall gunite concrete surface layer and pours waist rail;Step 6, the drilling installation anchor cable on foundation pit side-wall.Tubular pole of the present invention is in conjunction with mixing pile, and the pressure of foundation pit soil layer is born in multiple supporting, it is ensured that base pit stability.The support system that tubular pole, mixing pile, concrete topping and anchor cable are formed, has the effect of earth-retaining and sealing, solves the technical issues of single support system is not able to satisfy practice of construction demand, effectively improve construction efficiency, lifting construction quality.

Description

The outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining
Technical field
The present invention relates to the realm of building construction, the outer sealing supporting of anchor is applied in more particularly a kind of row's grating tubular pole grouting behind shaft or drift lining Work method.
Background technique
Pattern foundation pit supporting structure is soil-baffling structure and water-stop curtain according to function division in traditional sense.Soil-baffling structure mainly has: soil Follow closely wall, campshed, anchor pole, inner support, gravity type cement-soil retaining wall, the stake of SMW engineering method, armored concrete basement diaphragm wall etc.. Water-stop curtain mainly uses: cement mixing method, jet grouting, press injecting method etc., the geological conditions of foundation pit and week Surrounding environment determines supporting construction selection.Geological conditions includes soil condition and groundwater condition, and surrounding enviroment include neighboring buildings Object, road, public utility, underground utilities and construction loads etc..With urban construction fast development, the underground space is obtained More to utilize, the foundation pit encountered under complex environment is more and more, such as only with above a certain or two kinds of supporting measures, very much In the case of be difficult to meet supporting requirement, generally require for several supporting measures to be used in combination with.Therefore, under complex environment Foundation pit, how to select to adaptation to local conditions some support pattern, construction technology, reasonable combination, become pendulum in construction technical staff New problem in front.
Summary of the invention
Have the construction method for supporting of earth-retaining and water-stagnating effect can be with simultaneously the main purpose of the present invention is to provide a kind of Effectively solve the problems in background technique.
The present invention provides sealing supporting construction sides outside anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining to achieve the goals above Method, comprising the following steps:
Step 1: Farm Planning, levelling of the land to construction surface;
Step 2: PHC tubular pole is mounted in underground using piling machine in construction area boundary, and places steel in the tubular pole Muscle cage simultaneously pours expansion pea gravel concreten;
Step 3: it is stirred pile driving construction after the completion of the tube pile construction, stuff up a crack sets the first mixing pile between tubular pole, in tubular pole The second mixing pile is set at the curtain of outside;
Step 4: after having set up tubular pole and mixing pile, crown beam is poured in the top surface of tubular pole;
Step 5: topsoil, after interior comb stake is dug out, the pile lining on the inside of foundation pit are excavated to lower leaf, piecemeal within the scope of crown beam Upper extension layer of steel wire net, and gunite concrete surface layer pour waist rail when digging to the centre of foundation pit on side wall;
Step 6: after the completion of foundation pit construction, the drilling installation anchor cable on foundation pit side-wall.
As a preferred technical solution of the present invention, in step 2, the spacing between the tubular pole is 800mm, described Connector is using the double groove electric welding connections of end plate between tubular pole.
As a preferred technical solution of the present invention, in step 3, the first mixing pile diameter is 500mm, installation Pilespacing is 900mm, and the second mixing pile diameter is 500mm, installation pilespacing is 300mm.
It is fixed when wire netting is installed as a preferred technical solution of the present invention, described in step 5 using setscrew Onto tubular pole.
As a preferred technical solution of the present invention, waist rail described in step 5 is equipped with reinforcing bar and is connected on tubular pole, makes Waist rail is obtained to be connected with tubular pole.
As a preferred technical solution of the present invention, anchor cable described in step 6 is respectively upper anchor cable and lower anchor cable, is divided It is not mounted at crown beam and waist rail, and is reinforced and locked by nut.
As a preferred technical solution of the present invention, the first Grouting Pipe and the second Grouting Pipe, institute are equipped in the anchor cable The side for stating anchor cable is equipped with several steel strand wires.
As a preferred technical solution of the present invention, pass through the first Grouting Pipe and the second Grouting Pipe when anchor cable is installed for water Mud injects in anchor cable hole in two times, it is ensured that Forming Quality of the anchor cable in anchor cable hole.
The prior art is compared, the present invention provides have it is following the utility model has the advantages that
The innovative point of the patent of invention carries out closely knit add using PHC tubular pole joint bar cage concrete grouting behind shaft or drift lining mode in retaining piles Gu solving the problems, such as that joint anti-bending bearing capacity is weak, the anti-bending bearing capacity of tubular pole while and cement mixing pile are effectively improved In conjunction with the pressure of foundation pit soil layer is born in multiple supporting, it is ensured that base pit stability.Grouting Pipe is equipped in anchor cable, construction while pours Build cement slurry, it is ensured that anchor cable Forming Quality improves frictional force, bond stress between anchor cable and the soil body, and prestress anchorage cable changes base The stress in hole reduces the displacement of foundation pit crater wall, maintains the stabilization of supporting construction.Tubular pole, mixing pile, concrete topping and The support system that anchor cable is formed has the effect of earth-retaining and sealing, solves single support system in small space and is not able to satisfy reality The compound construction method for supporting of border construction demand, can effectively improve construction efficiency, lifting construction quality.
Detailed description of the invention
Fig. 1 is pattern foundation pit supporting structure plan view of the present invention;
Fig. 2 is that pattern foundation pit supporting structure of the present invention installs drawing;
Fig. 3 is that pattern foundation pit supporting structure of the present invention installs sectional view;
Fig. 4 is anchor cable crown beam scheme of installation of the present invention;
Fig. 5 is anchor cable structure plan view of the present invention;
In figure: 1. tubular poles, 2. first mixing piles, 3. second mixing piles, 4. crown beams, 5. waist rails, 6. concrete toppings, 7. anchor cables.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated, it should be understood that and the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
Schematic diagram disclosed by the invention is as shown in Fig. 1~5, the outer sealing supporting construction of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining Method, comprising the following steps:
Step 1: Farm Planning, levelling of the land to construction surface;
Step 2: tubular pole 1 is mounted in underground using piling machine in construction area boundary, and places steel in the tubular pole 1 Muscle cage simultaneously pours expansion pea gravel concreten, and for solving at PHC tubular pole 1 itself and welding point, bending resistance is poor, is easy to happen The shortcomings that broken pile, inclination;It carries out filling out core processing with C40 expansion pea gravel concreten, effectively improve the lateral rigidity of tubular pole 1 and resists Curved bearing capacity.
Step 3: the completion of tubular pole 1 is stirred pile driving construction, and stuff up a crack sets diameter as 500mm, pilespacing and is between tubular pole 1 The first mixing pile 2 of 900mm, 1 outside curtain of tubular pole set diameter as the second mixing pile 3 that 500mm, pilespacing are 300mm, and cement stirs Stake requirement is mixed using " four sprays four are stirred " technique, is constructed by mortar gunite method.
Step 4: after having set up tubular pole 1 and mixing pile, crown beam 4 is poured in the top surface of tubular pole 1, the crown beam 4 uses reinforcing bar Concrete collar tie beam, framework of steel reinforcement when pouring construction in crown beam are connect with the steel reinforcement cage that 1 top surface of tubular pole is exposed, concrete strength etc. Grade is C30.
Step 5: above-mentioned steps complete construction, and 4 concrete strength of crown beam divides downwards in 4 range of crown beam after reaching requirement Layer, piecemeal excavate topsoil, after interior comb stake 1 is dug out, to prevent inter-pile soil from falling off, hang layer of steel wire on pile lining on the inside of the foundation pit Net for solidifying foundation pit periphery soil property, while reaching water-stop curtain then in inter-pile soil area spray C20 concrete topping 6 Effect.Waist rail 5 is poured in foundation pit side-wall when foundation pit is dug to half, the waist rail 5 passes through the reinforcing bar of reinforcing bar and waist rail 5 before constructing Frame connection continues excavation pit sandy soil so that waist rail 5 is connected with tubular pole 1 after 5 concrete strength of waist rail reaches requirement, And casting concrete surface layer 6, the projected depth of foundation pit is arrived until digging.
Step 6: after the completion of foundation pit construction, several anchor cables 7 are installed in drilling on foundation pit side-wall, and the anchor cable 7 divides for upper anchor Rope and lower anchor cable are separately mounted at crown beam 4 and waist rail 5, after 7 injecting cement paste intensity of anchor cable reaches the 75% of design strength, side Can tensioning fixation, the anchor cable 7 is locked at crown beam 4 and waist rail 5 by nut reinforcing.
1 grouting behind shaft or drift lining of PHC tubular pole and prestress anchorage cable 7 are formed into binary earth-retaining building enclosure, a side by 4 waist rail 5 of crown beam Face carries out earth-retaining by PHC tubular pole 1, is on the other hand passed to the power that supporting construction is born steadily by prestress anchorage cable 7 Layer applies tensile stress to anchor cable 7, be conducive to frictional force between anchoring body and the soil body, the bond stress of drag-line and anchoring body and The collective effect of 7 intensity of anchor cable makes anchoring system keep stablizing.
Second mixing pile 3 in 1 outside of the first mixing pile 2 and tubular pole between tubular pole 1, adds pneumatically placed concrete on the inside of tubular pole 1 Surface layer 6 solidifies foundation pit periphery soil property, all has the effect of sealing.
The support system that the tubular pole 1, mixing pile, concrete topping 6 and anchor cable 7 are formed, the effect with earth-retaining and sealing Fruit solves the compound construction method for supporting that single support system in small space is not able to satisfy practice of construction demand, Ke Yiyou Effect improves construction efficiency, lifting construction quality.
Preferably, the anchoring section on the anchor cable 7 is made of surely middle bracket, and free segment is equipped with two Grouting Pipes and steel twists Line protrudes into anchoring section and anchor head, the slip casting when Grouting Pipe is constructed for anchor cable 7, it is ensured that 7 Forming Quality of anchor cable, so that anchor cable 7 It is fastened in the anchor cable hole on stratum, the anchor head of the anchor cable 7 is equipped with the nut for reinforcing locking anchor cable 7.
Preferably, in step 2, the spacing between tubular pole 1 is 800mm, and connector is using the double slopes of end plate between the tubular pole 1 Mouth electric welding connection.
Preferably, it is fixed on tubular pole 1 when wire netting is installed described in step 5 using setscrew.
The patent of invention is applicable to small space or the supporting of two layers of business district basement and ten meters or so deep basal pits is applied Work.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (8)

1. the outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining, comprising the following steps:
Step 1: Farm Planning, levelling of the land to construction surface;
Step 2: PHC tubular pole (1) is mounted in underground using piling machine in construction area boundary, and in the tubular pole (1) It places steel reinforcement cage and pours expansion pea gravel concreten;
Step 3: it is stirred pile driving construction after the completion of tubular pole (1) construction, stuff up a crack sets the first mixing pile between tubular pole (1) (2), the second mixing pile (3) are set at the curtain of tubular pole (1) outside;
Step 4: after having set up tubular pole (1) and mixing pile, crown beam (4) are poured in the top surface of tubular pole (1);
Step 5: topsoil is excavated to lower leaf, piecemeal in crown beam (4) range, after interior comb stake (1) is dug out, in foundation pit Hang layer of steel wire net on the pile lining of side, and gunite concrete surface layer (6) pours waist rail (5) when digging to the centre of foundation pit on side wall;
Step 6: after the completion of foundation pit construction, drilling installation anchor cable (7) on foundation pit side-wall.
2. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 1 In: in step 2, the spacing between tubular pole (1) is 800mm, and connector is connected using the double groove electric welding of end plate between the tubular pole (1) It connects.
3. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 1 In: in step 3, the first mixing pile (2) diameter is 500mm, installation pilespacing is 900mm, and the second mixing pile (3) diameter is 500mm, installation pilespacing are 300mm.
4. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 1 In: it is fixed on tubular pole (1) when wire netting being installed described in step 5 using setscrew.
5. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 1 In: waist rail described in step 5 (5) is equipped with reinforcing bar and is connected on tubular pole (1), so that waist rail (5) is connected with tubular pole (1).
6. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 1 In: anchor cable described in step 6 (7) is respectively upper anchor cable and lower anchor cable, is separately mounted at crown beam (4) and waist rail (5), and lead to It crosses nut and reinforces locking.
7. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 6 In: the first Grouting Pipe and the second Grouting Pipe are equipped in the anchor cable (7), the side of the anchor cable (7) is equipped with 2~4 steel strand wires.
8. the outer sealing construction method for supporting of anchor, feature exist in a kind of row's grating tubular pole grouting behind shaft or drift lining according to claim 7 In: cement slurry is injected in anchor cable hole in two times by the first Grouting Pipe and the second Grouting Pipe when installation anchor cable (7), it is ensured that anchor cable (7) in the Forming Quality of anchor cable hole.
CN201910529055.4A 2019-06-19 2019-06-19 The outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining Pending CN110241828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910529055.4A CN110241828A (en) 2019-06-19 2019-06-19 The outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910529055.4A CN110241828A (en) 2019-06-19 2019-06-19 The outer sealing construction method for supporting of anchor in a kind of row's grating tubular pole grouting behind shaft or drift lining

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CN110241828A true CN110241828A (en) 2019-09-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648376A (en) * 2020-06-10 2020-09-11 深圳市市政工程总公司 Construction method adopting deep foundation pit supporting and anchoring structure for supporting
CN111794246A (en) * 2020-07-21 2020-10-20 安徽省交通建设股份有限公司 Excavation supporting system for foundation pit of upper-penetrating subway tunnel and construction method
CN112252331A (en) * 2020-08-28 2021-01-22 河海大学 Deep foundation pit inclined support supporting structure and construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648376A (en) * 2020-06-10 2020-09-11 深圳市市政工程总公司 Construction method adopting deep foundation pit supporting and anchoring structure for supporting
CN111794246A (en) * 2020-07-21 2020-10-20 安徽省交通建设股份有限公司 Excavation supporting system for foundation pit of upper-penetrating subway tunnel and construction method
CN112252331A (en) * 2020-08-28 2021-01-22 河海大学 Deep foundation pit inclined support supporting structure and construction method

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