CN100543240C - Build the method for thin concrete underground diaphragm wall - Google Patents
Build the method for thin concrete underground diaphragm wall Download PDFInfo
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- CN100543240C CN100543240C CNB2008100285316A CN200810028531A CN100543240C CN 100543240 C CN100543240 C CN 100543240C CN B2008100285316 A CNB2008100285316 A CN B2008100285316A CN 200810028531 A CN200810028531 A CN 200810028531A CN 100543240 C CN100543240 C CN 100543240C
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Abstract
The present invention relates to construction engineering technical field, a kind of widen type water jetting device that is used to build thin concrete underground diaphragm wall is proposed, its structure is formed except that casing, water inlet pipe, dreg-drawing pipe, jet assembly and the cutting tool assembly of common jetting capstan engine, expansion groove cutter and guide pad that " eight " font is arranged also are installed in tank ends, increase horizontal nozzle simultaneously.This capstan engine uses in the second stage of groove section pore-creating step of building thin concrete underground diaphragm wall, make formed the second stage of slotted eye have the bellend part that is positioned at periphery, first phase wall section termination, thereby first phase wall section termination in the diaphragm wall that is caused being inserted form insertion slot type in the groove of the second stage of wall section termination connect.The present invention with one, the second stage of wall section become the insertion slot type connection by the common planar overlap joint, the anti-permeability performance of joint significantly improves; Capstan engine grooving of the present invention is accurate, can guarantee that the second stage of wall section does not have to depart from first phase wall section to be connected, and improves the bulk strength and the impervious reliability of body of wall.
Description
Technical field
The present invention relates to construction engineering technical field, especially build the thin diaphragm wall technology.
Background technology
Thin concrete underground diaphragm wall (hereinafter to be referred as " thin wall ") is meant a kind of diaphragm wall that its thickness is thin with respect to common diaphragm wall.Because plurality of advantages such as thin wall has good seepage-proof property, quick construction, reduce investment outlay, thereby in recent years many water conservancies and environment-friendly engineering, replaced common diaphragm wall, as the dyke seepage control that impervious wall is used for rivers, lake, reservoir reinforce, engineerings such as groundwater environment pollution control and the discarded underground antiseepage processing of landfill yard of rubbish.Can affirm that along with approaching the full-fledged of wall building technology, its application will be more and more widely.At present, build grooving (pore-creating) method that approaches the wall employing and mainly contain water jetting, grab bucket method, Churn drill method etc.Wherein, water jetting has more advantage at aspects such as work efficiency, energy-saving and environmental protection than additive method, thus in Jiangxi of China, more this technology that adopted in area such as Fujian, Beijing, Guangdong.
The basic principle that water jetting is built thin wall technology is: the jet assembly that high pressure slurry pump is delivered to water under high pressure in the capstan engine through water inlet pipe also penetrates by the vertical nozzle of the row of one on it, forms high-speed jet the stratum is cut.Meanwhile, the capstan engine generation impact force that pumps under the drive of main winch is by being arranged at the further die-cut stratum of cutter of capstan engine bottom outer rim.Thereby earth formation is damaged to form under the double action of jet and cutter and has the flat cylindricality slotted eye of setting size.Mixed to form water and soil slag slurry by jet and the die-cut dregs that gets off of cutter with water, under the effect of the impact of capstan engine and jet, be the state of rolling, utilize sand pump to extract the slag slurry out slotted eye through dreg-drawing pipe.Along with capstan engine drilling depth progressively, continue from the aperture to slotted eye supply slurry coat method and keep enough slurry face elevation to stablize slotted eye.Slotted eye carries out hole clearly after reaching projected depth, and clear hole finishes and in time adopts the catheterized reperfusion concrete, thereby builds up unit wall section.Separate the second stage of groove section during construction, elder generation's construction first phase groove section, treat to carry out the second stage of groove section construction again after adjacent two sections first phase wall section concretes reach certain intensity, the first phase wall section that the second stage of wall section of building up is adjacent with the left and right sides fuses, and a plurality of one, the second stage of unit wall section overlaps mutually and is linked to be complete concrete continuous wall.Fig. 1 is that groove section sequence of construction and body of wall form schematic diagram.
Thin wall thickness degree is generally 220mm～500mm, unit wall segment length 2～2.8m, and the degree of depth can reach 40m.Because body of wall is thin, the degree of depth is big, very easily fissure of displacement overlap joint between the generating unit wall section causes anti-seepage effect not reach the situation of requirement.Therefore, guarantee that the verticality and the dimensional accuracy of each unit wall section of building up is most important.At present, the design vertical precision (gradient) of domestic state-of-the-art water injection process for building wall machine is 1/300.That is to say, if the dark 30m of wall, wall thickness 300mm, grooving gradient are 1/300, the designing requirement of wall section size conforms, so in the dark bottom of 30m, the overlap joint thickness of adjacent wall section may have only 100mm, if have some link precision to fail to reach requirement in the construction process in addition, the wall section just take place probably overlap mass defects such as bad.This shows that thin wall quality seriously is limited by the technology status and the technical level of operators of grooving equipment.How to adopt an effective measure guarantees the overlap joint quality of wall section, has been that numerous engineers and technicians made great efforts the difficult problem explored always for it since the water injection process for building wall technology was come out.Effectively break through this difficult problem, will open incomparable wide popularization and application space for the thin wall building technology of water jetting.
Summary of the invention
The objective of the invention is to propose the method that a kind of widen type water jetting method is built thin concrete underground diaphragm wall, it can solve the articulation issues of the second stage of wall section and first phase wall section, guaranteeing that the second stage of wall section does not have to depart from first phase wall section is connected, and improves the quality of thin concrete underground diaphragm wall greatly; Propose to be used for the widen type water jetting device of this method simultaneously.
Purpose of the present invention adopts following technical scheme to realize:
Widen type water jetting method is built the method for thin concrete underground diaphragm wall, carries out the pore-creating of first phase groove section successively, first phase wall section becomes wall, the pore-creating of the second stage of groove section, the second stage of wall section to become four steps of wall, wherein:
The pore-creating of plain edition jetting capstan engine is adopted in the pore-creating of first phase groove section, makes to form to have flat cylindricality first phase slotted eye;
First phase wall section becomes wall, and job practices concrete perfusion in the first phase slotted eye makes and forms flat cylindricality first phase wall section routinely;
The pore-creating of widen type water jetting device is adopted in second phase groove section pore-creating, makes to form the flat cylindricality second phase slotted eye with bellend;
Second phase wall section becomes wall, and job practices concrete perfusion in the second stage of slotted eye makes and forms the flat cylindricality second phase wall section with bellend routinely;
It is characterized in that: in the second stage of groove section pore-creating step, the bellend of formed flat cylindricality second phase slotted eye partly is positioned at periphery, first phase wall section termination, the flat cylindricality second phase wall section that forms behind the concrete perfusion has the groove shaped bellend, and the interior insertion slot type that forms of groove that the second stage of wall section termination is inserted in first phase wall section termination connects.
In the second stage of groove section pore-creating step, adopt special thin diaphragm wall jetting capstan engine pore-creating, this jetting capstan engine is the transformation of existing jetting capstan engine, its structure includes casing, water inlet pipe, dreg-drawing pipe, jet assembly and cutting tool assembly, jet assembly and cutting tool assembly are located at bottom half, the end of water inlet pipe is connected with jet assembly, the dreg-drawing pipe mouth of pipe opens wide down, its end places bottom half, the side, two ends of casing is provided with wire brush, and the casing top is provided with suspension ring and guide peg, it is characterized in that: add in tank ends and expand the groove cutter, expand the oblique casing of groove cutter and stretch out certain-length outward, two of every end are expanded the groove cutter and form " eight " font layout.
Prioritization scheme is to expand the groove cutter to be installed on tank ends by upper/lower positions, and tank ends is equipped with by top and expands the guide pad that corresponding two groups of " eight " fonts of groove cutter are arranged.
Jet assembly increases the horizontal nozzle in two ends.
This capstan engine is exclusively used in the formation of the second stage of slotted eye, during operation, the capstan engine two ends are expanded the groove cutter and are cut the soil body in advance, be the open expansion groove of " eight " font cutter and slightly put in and stick first phase wall section end to first phase wall section, in the second stage of groove section pore forming process, utilize the die-cut effect of expanding the groove cutter to enlarge the slotted eye width of connecting portion, and corner cut is carried out in first phase wall section end repair the conformation of rules that makes its formation band chamfering, meanwhile open jetting function and make capstan engine follow-up pore-creating, the horizontal nozzle at capstan engine two ends and wire brush are cleaned cleaning to first phase wall section end.Along with whole capstan engine enters soil layer, guide pad begins to play a role, and it is that guide way plays guiding, positioning action to capstan engine with first phase wall section, the guiding capstan engine to depth direction drilling depth until satisfying degree of depth requirement.Formed the second stage of slotted eye has the expansion termination, and this bellend head part is positioned at periphery, first phase wall section termination.
After the second stage of slotted eye with expansion termination has been arranged, become the second stage of wall section that concrete perfusion just can form the expansion termination with band groove in the wall step, realized that the insertion slot type that insert in the groove of the second stage of wall section termination first phase wall section termination connects in the second stage of wall section.
With existing thin concrete underground diaphragm wall building technology contrast, the present invention has following outstanding substantive distinguishing features and obvious improvement:
With one, the second stage of wall section become the insertion slot type connection by the common planar overlap joint, enlarged the entity volume and the overlap joint area of joint, prolonged seepage paths greatly, significantly improved the anti-permeability performance of joint.
2. lead expansion formula capstan engine with the first phase wall section of and arranged on left and right sides as guide way, formed the second stage of slotted eye can be guaranteed that the second stage of wall section does not have to depart from first phase wall section and be connected, avoided owing to one, the second stage of wall section generation perpendicularity deviation or dislocation cause overlapping bad may, guarantee the continuity of body of wall, improved the bulk strength and the impervious reliability of body of wall.
3. when the second stage of groove section is constructed, the expansion groove cutter of leading on the expansion formula capstan engine carries out top-down finishing to the form of first phase wall section end, excises water caltrop and ledge on it, forms the conformation of rules of band chamfering, improve the connection effect of wall section, guaranteed the total quality of diaphragm wall body of wall.
4. lead in the expansion formula capstan engine drilling depth process, the wire brush that is installed on its side, two ends pumps with capstan engine, assisting down of horizontal injection stream, has effectively removed the mud skin and the impurity of first phase wall section end face, has improved the compactness of joint.
5. the drilling depth operation of leading expansion formula capstan engine in fact also is a testing process, can check the verticality and the dimensional accuracy of first phase wall section from its drilling depth situation, find the defective that first phase wall section may exist early, be convenient in time adopt remedial measures, guarantee thin wall quality.
6. lead expansion formula capstan engine and can make multiple patterns such as linear pattern or arc according to actual needs,, be convenient to build arc, broken line shape, the thin wall of polygon to satisfy the concrete needs of different engineerings.
Description of drawings:
Fig. 1 underground continuous wall groove segment sequence of construction and body of wall form schematic diagram;
Fig. 2 diaphragm wall building technology of the present invention process chart;
The common jetting capstan engine of Fig. 3 structural representation;
The common jetting capstan engine of Fig. 4 structure vertical view;
Fig. 5 widen type water jetting device of the present invention structural representation;
Fig. 6 widen type water jetting device of the present invention structure vertical view;
Fig. 7 is of the present invention when leading the operation of expansion formula capstan engine and the relative position schematic diagram of first phase wall section;
Of the present invention one, the second stage of wall section connection diagram of Fig. 8.
The specific embodiment
Embodiment one
With reference to figure 5 and Fig. 6, implementing key technology of the present invention is to use a kind of widen type water jetting device, the structure of this jetting capstan engine as shown in Figure 5 and Figure 6, be to form by the transformation of existing common jetting capstan engine (as Fig. 3 and Fig. 4), it includes casing 1, water inlet pipe 4, dreg-drawing pipe 5, jet assembly 2 and cutting tool assembly 3, jet assembly 2 and cutting tool assembly 3 are located at bottom half, the end of water inlet pipe 4 is connected with jet assembly 2, dreg-drawing pipe 5 mouths of pipe open wide down, its end places casing 1 bottom, the side, two ends of casing 1 is provided with wire brush 9, casing 1 top is provided with suspension ring 6 and guide peg 11, it is characterized in that: add at casing 1 two ends and expand groove cutter 8, expand groove cutter 8 oblique casings and stretch out certain-length outward, two of every end are expanded groove cutter 8 and form " eight " font layout.The expansion groove cutter 8 of present embodiment is installed on casing 1 two ends by upper/lower positions, and casing 1 two ends are equipped with by top and expand the guide pad 7 that groove cutter 8 corresponding two groups of " eight " fonts are arranged; Jet assembly 2 increases the horizontal nozzle 21 in two ends, and arrow is represented jet water course or taken out the slag direction among the figure.
Embodiment two
With reference to figure 1, Fig. 2, Fig. 3 and Fig. 4, the widen type water jetting method that the present invention proposes is built the method for thin concrete underground diaphragm wall, carry out the pore-creating of first phase groove section successively, first phase wall section becomes wall, the pore-creating of the second stage of groove section, the second stage of wall section to become four steps of wall, its section phase divide and construction sequence as depicted in figs. 1 and 2, wherein:
Plain edition jetting capstan engine (as Fig. 3 and Fig. 4) pore-creating is adopted in the pore-creating of first phase groove section; Make to form and have flat cylindricality first phase slotted eye;
First phase wall section becomes wall, and job practices concrete perfusion in the first phase slotted eye makes and forms flat cylindricality first phase wall section 10 routinely;
Widen type water jetting device (as Fig. 5 and Fig. 6) pore-creating (as Fig. 7) is adopted in second phase groove section pore-creating; Make to form the flat cylindricality second phase slotted eye 20 ' (as Fig. 8) with bellend, the bellend part 201 ' of flat cylindricality second phase slotted eye 20 ' is positioned at 101 peripheries, first phase wall section termination;
Second phase wall section becomes wall, and job practices concrete perfusion in the second stage of slotted eye 20 ' makes and forms the flat cylindricality second phase wall section 20 with bellend routinely, and the bellend 201 of the second stage of wall section 20 has groove,
The interior insertion slot type that forms of groove that the second stage of wall section bellend 201 is inserted in first phase wall section 10 terminations 101 of formed thin diaphragm wall connects (as shown in Figure 8).
Adopt the widen type water jetting device of describing among the embodiment one to form the second stage of slotted eye 20 ' in the second phase groove section pore-creating step, in conjunction with reference to figure 5, Fig. 6 and Fig. 7, during operation, the expansion groove cutter 8 at capstan engine two ends is cut the soil body in advance, be the open expansion groove of " eight " font cutter 8 and slightly put in and stick first phase wall section 10 ends to first phase wall section 10, in the second stage of groove section pore forming process, utilize the die-cut effect of expanding groove cutter 8 to enlarge the slotted eye width of connecting portion, and corner cut is carried out in first phase wall section 10 ends repair the conformation of rules that makes its formation band chamfering, meanwhile open jetting function and make capstan engine follow-up pore-creating, cleaning is cleaned in the horizontal nozzle 21 at capstan engine two ends and 9 pairs of first phase walls of wire brush section, 10 ends.Along with whole capstan engine enters soil layer, guide pad 7 begins to play a role, and it is that guide way plays guiding, positioning action to capstan engine with first phase wall section 10, the guiding capstan engine to depth direction drilling depth until satisfying degree of depth requirement.
Claims (1)
1. build the method for thin concrete underground diaphragm wall, carry out the pore-creating of first phase groove section successively, first phase wall section becomes wall, the pore-creating of the second stage of groove section, the second stage of wall section to become four steps of wall, wherein:
The pore-creating of plain edition jetting capstan engine is adopted in the pore-creating of first phase groove section, makes to form to have flat cylindricality first phase slotted eye;
First phase wall section becomes wall, and job practices concrete perfusion in the first phase slotted eye makes to form flat cylindricality first phase wall section routinely;
The pore-creating of widen type water jetting device is adopted in second phase groove section pore-creating, makes to form the flat cylindricality second phase slotted eye with bellend;
Second phase wall section becomes wall, and job practices concrete perfusion in the second stage of slotted eye makes and forms the flat cylindricality second phase wall section with bellend routinely;
It is characterized in that: in the second stage of groove section pore-creating step, the bellend of formed flat cylindricality second phase slotted eye partly is positioned at periphery, first phase wall section termination, the flat cylindricality second phase wall section that forms behind the concrete perfusion has the groove shaped bellend, and the interior insertion slot type that forms of groove that the second stage of wall section termination is inserted in first phase wall section termination connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100285316A CN100543240C (en) | 2008-06-04 | 2008-06-04 | Build the method for thin concrete underground diaphragm wall |
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| CNB2008100285316A CN100543240C (en) | 2008-06-04 | 2008-06-04 | Build the method for thin concrete underground diaphragm wall |
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| CN100543240C true CN100543240C (en) | 2009-09-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102182217B (en) * | 2011-01-24 | 2014-11-19 | 项敬来 | Tongue and groove joint saw tools |
| CN102619246B (en) * | 2012-04-18 | 2014-07-30 | 国网浙江余姚市供电公司 | Impact groove expander |
| CN107700475B (en) * | 2017-11-16 | 2023-07-28 | 浙江杰立建设集团有限公司 | Assembled concrete underground diaphragm wall structure and construction process |
| CN108265703B (en) * | 2018-02-12 | 2024-02-23 | 江苏地龙重型机械有限公司 | Cutter device for seamless grooving machine of thin-wall continuous wall |
| CN108978754A (en) * | 2018-07-05 | 2018-12-11 | 河南黄河河务局焦作黄河河务局 | A kind of continuous trough forming system and the method that continuous subterranean wall is built using it |
| CN109469046B (en) * | 2018-12-27 | 2024-01-16 | 重庆长征重工有限责任公司 | Strip deep and narrow foundation excavation grouting integrated equipment |
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